Unified · Split
| @@ -0,0 +1,3 @@ | |||
| 1 | [spatch] | ||
| 2 | options = --timeout 200 | ||
| 3 | options = --use-gitgrep | ||
| @@ -37,6 +37,7 @@ modules.builtin · 36 unmodified lines | |||
| 37 | Module.symvers | 37 | Module.symvers |
| 38 | *.dwo | 38 | *.dwo |
| 39 | *.su | 39 | *.su |
| 40 | *.c.[012]*.* | ||
| 40 | 41 | ||
| 41 | # | 42 | # |
| 42 | # Top-level generic files | 43 | # Top-level generic files |
| @@ -66,6 +67,7 @@ Module.symvers · 23 unmodified lines | |||
| 66 | # | 67 | # |
| 67 | !.gitignore | 68 | !.gitignore |
| 68 | !.mailmap | 69 | !.mailmap |
| 70 | !.cocciconfig | ||
| 69 | 71 | ||
| 70 | # | 72 | # |
| 71 | # Generated include files | 73 | # Generated include files |
| @@ -92,9 +92,17 @@ Krzysztof Kozlowski <krzk@kernel.org> <k.kozlowski.k@gmail.com> · 91 unmodified lines | |||
| 92 | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 92 | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| 93 | Leonid I Ananiev <leonid.i.ananiev@intel.com> | 93 | Leonid I Ananiev <leonid.i.ananiev@intel.com> |
| 94 | Linas Vepstas <linas@austin.ibm.com> | 94 | Linas Vepstas <linas@austin.ibm.com> |
| 95 | Linus Lüssing <linus.luessing@c0d3.blue> <linus.luessing@web.de> | ||
| 96 | Linus Lüssing <linus.luessing@c0d3.blue> <linus.luessing@ascom.ch> | ||
| 95 | Mark Brown <broonie@sirena.org.uk> | 97 | Mark Brown <broonie@sirena.org.uk> |
| 96 | Matthieu CASTET <castet.matthieu@free.fr> | 98 | Matthieu CASTET <castet.matthieu@free.fr> |
| 97 | Mauro Carvalho Chehab <mchehab@kernel.org> <maurochehab@gmail.com> <mchehab@infradead.org> <mchehab@redhat.com> <m.chehab@samsung.com> <mchehab@osg.samsung.com> <mchehab@s-opensource.com> | 99 | Mauro Carvalho Chehab <mchehab@kernel.org> <mchehab@brturbo.com.br> |
| 100 | Mauro Carvalho Chehab <mchehab@kernel.org> <maurochehab@gmail.com> | ||
| 101 | Mauro Carvalho Chehab <mchehab@kernel.org> <mchehab@infradead.org> | ||
| 102 | Mauro Carvalho Chehab <mchehab@kernel.org> <mchehab@redhat.com> | ||
| 103 | Mauro Carvalho Chehab <mchehab@kernel.org> <m.chehab@samsung.com> | ||
| 104 | Mauro Carvalho Chehab <mchehab@kernel.org> <mchehab@osg.samsung.com> | ||
| 105 | Mauro Carvalho Chehab <mchehab@kernel.org> <mchehab@s-opensource.com> | ||
| 98 | Matt Ranostay <mranostay@gmail.com> Matthew Ranostay <mranostay@embeddedalley.com> | 106 | Matt Ranostay <mranostay@gmail.com> Matthew Ranostay <mranostay@embeddedalley.com> |
| 99 | Matt Ranostay <mranostay@gmail.com> <matt.ranostay@intel.com> | 107 | Matt Ranostay <mranostay@gmail.com> <matt.ranostay@intel.com> |
| 100 | Mayuresh Janorkar <mayur@ti.com> | 108 | Mayuresh Janorkar <mayur@ti.com> |
| @@ -130,7 +138,10 @@ Santosh Shilimkar <santosh.shilimkar@oracle.org> · 29 unmodified lines | |||
| 130 | Sascha Hauer <s.hauer@pengutronix.de> | 138 | Sascha Hauer <s.hauer@pengutronix.de> |
| 131 | S.Çağlar Onur <caglar@pardus.org.tr> | 139 | S.Çağlar Onur <caglar@pardus.org.tr> |
| 132 | Shiraz Hashim <shiraz.linux.kernel@gmail.com> <shiraz.hashim@st.com> | 140 | Shiraz Hashim <shiraz.linux.kernel@gmail.com> <shiraz.hashim@st.com> |
| 133 | Shuah Khan <shuah@kernel.org> <shuahkhan@gmail.com> <shuah.khan@hp.com> <shuahkh@osg.samsung.com> <shuah.kh@samsung.com> | 141 | Shuah Khan <shuah@kernel.org> <shuahkhan@gmail.com> |
| 142 | Shuah Khan <shuah@kernel.org> <shuah.khan@hp.com> | ||
| 143 | Shuah Khan <shuah@kernel.org> <shuahkh@osg.samsung.com> | ||
| 144 | Shuah Khan <shuah@kernel.org> <shuah.kh@samsung.com> | ||
| 134 | Simon Kelley <simon@thekelleys.org.uk> | 145 | Simon Kelley <simon@thekelleys.org.uk> |
| 135 | Stéphane Witzmann <stephane.witzmann@ubpmes.univ-bpclermont.fr> | 146 | Stéphane Witzmann <stephane.witzmann@ubpmes.univ-bpclermont.fr> |
| 136 | Stephen Hemminger <shemminger@osdl.org> | 147 | Stephen Hemminger <shemminger@osdl.org> |
| @@ -77,3 +77,12 @@ Description: · 76 unmodified lines | |||
| 77 | Enable/disable the PWM signal. | 77 | Enable/disable the PWM signal. |
| 78 | 0 is disabled | 78 | 0 is disabled |
| 79 | 1 is enabled | 79 | 1 is enabled |
| 80 | |||
| 81 | What: /sys/class/pwm/pwmchipN/pwmX/capture | ||
| 82 | Date: June 2016 | ||
| 83 | KernelVersion: 4.8 | ||
| 84 | Contact: Lee Jones <lee.jones@linaro.org> | ||
| 85 | Description: | ||
| 86 | Capture information about a PWM signal. The output format is a | ||
| 87 | pair unsigned integers (period and duty cycle), separated by a | ||
| 88 | single space. | ||
| @@ -369,35 +369,32 @@ See also dma_map_single(). · 368 unmodified lines | |||
| 369 | dma_addr_t | 369 | dma_addr_t |
| 370 | dma_map_single_attrs(struct device *dev, void *cpu_addr, size_t size, | 370 | dma_map_single_attrs(struct device *dev, void *cpu_addr, size_t size, |
| 371 | enum dma_data_direction dir, | 371 | enum dma_data_direction dir, |
| 372 | struct dma_attrs *attrs) | 372 | unsigned long attrs) |
| 373 | 373 | ||
| 374 | void | 374 | void |
| 375 | dma_unmap_single_attrs(struct device *dev, dma_addr_t dma_addr, | 375 | dma_unmap_single_attrs(struct device *dev, dma_addr_t dma_addr, |
| 376 | size_t size, enum dma_data_direction dir, | 376 | size_t size, enum dma_data_direction dir, |
| 377 | struct dma_attrs *attrs) | 377 | unsigned long attrs) |
| 378 | 378 | ||
| 379 | int | 379 | int |
| 380 | dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, | 380 | dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, |
| 381 | int nents, enum dma_data_direction dir, | 381 | int nents, enum dma_data_direction dir, |
| 382 | struct dma_attrs *attrs) | 382 | unsigned long attrs) |
| 383 | 383 | ||
| 384 | void | 384 | void |
| 385 | dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sgl, | 385 | dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sgl, |
| 386 | int nents, enum dma_data_direction dir, | 386 | int nents, enum dma_data_direction dir, |
| 387 | struct dma_attrs *attrs) | 387 | unsigned long attrs) |
| 388 | 388 | ||
| 389 | The four functions above are just like the counterpart functions | 389 | The four functions above are just like the counterpart functions |
| 390 | without the _attrs suffixes, except that they pass an optional | 390 | without the _attrs suffixes, except that they pass an optional |
| 391 | struct dma_attrs*. | 391 | dma_attrs. |
| 392 | |||
| 393 | struct dma_attrs encapsulates a set of "DMA attributes". For the | ||
| 394 | definition of struct dma_attrs see linux/dma-attrs.h. | ||
| 395 | 392 | ||
| 396 | The interpretation of DMA attributes is architecture-specific, and | 393 | The interpretation of DMA attributes is architecture-specific, and |
| 397 | each attribute should be documented in Documentation/DMA-attributes.txt. | 394 | each attribute should be documented in Documentation/DMA-attributes.txt. |
| 398 | 395 | ||
| 399 | If struct dma_attrs* is NULL, the semantics of each of these | 396 | If dma_attrs are 0, the semantics of each of these functions |
| 400 | functions is identical to those of the corresponding function | 397 | is identical to those of the corresponding function |
| 401 | without the _attrs suffix. As a result dma_map_single_attrs() | 398 | without the _attrs suffix. As a result dma_map_single_attrs() |
| 402 | can generally replace dma_map_single(), etc. | 399 | can generally replace dma_map_single(), etc. |
| 403 | 400 | ||
| @@ -405,15 +402,15 @@ As an example of the use of the *_attrs functions, here's how · 1 unmodified line | |||
| 405 | you could pass an attribute DMA_ATTR_FOO when mapping memory | 402 | you could pass an attribute DMA_ATTR_FOO when mapping memory |
| 406 | for DMA: | 403 | for DMA: |
| 407 | 404 | ||
| 408 | #include <linux/dma-attrs.h> | 405 | #include <linux/dma-mapping.h> |
| 409 | /* DMA_ATTR_FOO should be defined in linux/dma-attrs.h and | 406 | /* DMA_ATTR_FOO should be defined in linux/dma-mapping.h and |
| 410 | * documented in Documentation/DMA-attributes.txt */ | 407 | * documented in Documentation/DMA-attributes.txt */ |
| 411 | ... | 408 | ... |
| 412 | 409 | ||
| 413 | DEFINE_DMA_ATTRS(attrs); | 410 | unsigned long attr; |
| 414 | dma_set_attr(DMA_ATTR_FOO, &attrs); | 411 | attr |= DMA_ATTR_FOO; |
| 415 | .... | 412 | .... |
| 416 | n = dma_map_sg_attrs(dev, sg, nents, DMA_TO_DEVICE, &attr); | 413 | n = dma_map_sg_attrs(dev, sg, nents, DMA_TO_DEVICE, attr); |
| 417 | .... | 414 | .... |
| 418 | 415 | ||
| 419 | Architectures that care about DMA_ATTR_FOO would check for its | 416 | Architectures that care about DMA_ATTR_FOO would check for its |
| @@ -422,12 +419,10 @@ routines, e.g.: · 2 unmodified lines | |||
| 422 | 419 | ||
| 423 | void whizco_dma_map_sg_attrs(struct device *dev, dma_addr_t dma_addr, | 420 | void whizco_dma_map_sg_attrs(struct device *dev, dma_addr_t dma_addr, |
| 424 | size_t size, enum dma_data_direction dir, | 421 | size_t size, enum dma_data_direction dir, |
| 425 | struct dma_attrs *attrs) | 422 | unsigned long attrs) |
| 426 | { | 423 | { |
| 427 | .... | 424 | .... |
| 428 | int foo = dma_get_attr(DMA_ATTR_FOO, attrs); | 425 | if (attrs & DMA_ATTR_FOO) |
| 429 | .... | ||
| 430 | if (foo) | ||
| 431 | /* twizzle the frobnozzle */ | 426 | /* twizzle the frobnozzle */ |
| 432 | .... | 427 | .... |
| 433 | 428 | ||
| @@ -2,7 +2,7 @@ · 1 unmodified line | |||
| 2 | ============== | 2 | ============== |
| 3 | 3 | ||
| 4 | This document describes the semantics of the DMA attributes that are | 4 | This document describes the semantics of the DMA attributes that are |
| 5 | defined in linux/dma-attrs.h. | 5 | defined in linux/dma-mapping.h. |
| 6 | 6 | ||
| 7 | DMA_ATTR_WRITE_BARRIER | 7 | DMA_ATTR_WRITE_BARRIER |
| 8 | ---------------------- | 8 | ---------------------- |
| @@ -6,8 +6,6 @@ · 5 unmodified lines | |||
| 6 | # To add a new book the only step required is to add the book to the | 6 | # To add a new book the only step required is to add the book to the |
| 7 | # list of DOCBOOKS. | 7 | # list of DOCBOOKS. |
| 8 | 8 | ||
| 9 | ifeq ($(IGNORE_DOCBOOKS),) | ||
| 10 | |||
| 11 | DOCBOOKS := z8530book.xml device-drivers.xml \ | 9 | DOCBOOKS := z8530book.xml device-drivers.xml \ |
| 12 | kernel-hacking.xml kernel-locking.xml deviceiobook.xml \ | 10 | kernel-hacking.xml kernel-locking.xml deviceiobook.xml \ |
| 13 | writing_usb_driver.xml networking.xml \ | 11 | writing_usb_driver.xml networking.xml \ |
| @@ -16,10 +14,16 @@ DOCBOOKS := z8530book.xml device-drivers.xml \ · 2 unmodified lines | |||
| 16 | genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml \ | 14 | genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml \ |
| 17 | 80211.xml debugobjects.xml sh.xml regulator.xml \ | 15 | 80211.xml debugobjects.xml sh.xml regulator.xml \ |
| 18 | alsa-driver-api.xml writing-an-alsa-driver.xml \ | 16 | alsa-driver-api.xml writing-an-alsa-driver.xml \ |
| 19 | tracepoint.xml gpu.xml media_api.xml w1.xml \ | 17 | tracepoint.xml w1.xml \ |
| 20 | writing_musb_glue_layer.xml crypto-API.xml iio.xml | 18 | writing_musb_glue_layer.xml crypto-API.xml iio.xml |
| 21 | 19 | ||
| 22 | include Documentation/DocBook/media/Makefile | 20 | ifeq ($(DOCBOOKS),) |
| 21 | |||
| 22 | # Skip DocBook build if the user explicitly requested no DOCBOOKS. | ||
| 23 | .DEFAULT: | ||
| 24 | @echo " SKIP DocBook $@ target (DOCBOOKS=\"\" specified)." | ||
| 25 | |||
| 26 | else | ||
| 23 | 27 | ||
| 24 | ### | 28 | ### |
| 25 | # The build process is as follows (targets): | 29 | # The build process is as follows (targets): |
| @@ -49,7 +53,6 @@ pdfdocs: $(PDF) · 23 unmodified lines | |||
| 49 | HTML := $(sort $(patsubst %.xml, %.html, $(BOOKS))) | 53 | HTML := $(sort $(patsubst %.xml, %.html, $(BOOKS))) |
| 50 | htmldocs: $(HTML) | 54 | htmldocs: $(HTML) |
| 51 | $(call cmd,build_main_index) | 55 | $(call cmd,build_main_index) |
| 52 | $(call install_media_images) | ||
| 53 | 56 | ||
| 54 | MAN := $(patsubst %.xml, %.9, $(BOOKS)) | 57 | MAN := $(patsubst %.xml, %.9, $(BOOKS)) |
| 55 | mandocs: $(MAN) | 58 | mandocs: $(MAN) |
| @@ -217,19 +220,7 @@ silent_gen_xml = : · 161 unmodified lines | |||
| 217 | -e "s/>/\\>/g"; \ | 220 | -e "s/>/\\>/g"; \ |
| 218 | echo "</programlisting>") > $@ | 221 | echo "</programlisting>") > $@ |
| 219 | 222 | ||
| 220 | else | 223 | endif # DOCBOOKS="" |
| 221 | |||
| 222 | # Needed, due to cleanmediadocs | ||
| 223 | include Documentation/DocBook/media/Makefile | ||
| 224 | |||
| 225 | htmldocs: | ||
| 226 | pdfdocs: | ||
| 227 | psdocs: | ||
| 228 | xmldocs: | ||
| 229 | installmandocs: | ||
| 230 | |||
| 231 | endif # IGNORE_DOCBOOKS | ||
| 232 | |||
| 233 | 224 | ||
| 234 | ### | 225 | ### |
| 235 | # Help targets as used by the top-level makefile | 226 | # Help targets as used by the top-level makefile |
| @@ -246,7 +237,7 @@ dochelp: · 10 unmodified lines | |||
| 246 | @echo ' make DOCBOOKS="s1.xml s2.xml" [target] Generate only docs s1.xml s2.xml' | 237 | @echo ' make DOCBOOKS="s1.xml s2.xml" [target] Generate only docs s1.xml s2.xml' |
| 247 | @echo ' valid values for DOCBOOKS are: $(DOCBOOKS)' | 238 | @echo ' valid values for DOCBOOKS are: $(DOCBOOKS)' |
| 248 | @echo | 239 | @echo |
| 249 | @echo " make IGNORE_DOCBOOKS=1 [target] Don't generate docs from Docbook" | 240 | @echo " make DOCBOOKS=\"\" [target] Don't generate docs from Docbook" |
| 250 | @echo ' This is useful to generate only the ReST docs (Sphinx)' | 241 | @echo ' This is useful to generate only the ReST docs (Sphinx)' |
| 251 | 242 | ||
| 252 | 243 | ||
| @@ -269,7 +260,7 @@ clean-files := $(DOCBOOKS) \ · 16 unmodified lines | |||
| 269 | 260 | ||
| 270 | clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man | 261 | clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man |
| 271 | 262 | ||
| 272 | cleandocs: cleanmediadocs | 263 | cleandocs: |
| 273 | $(Q)rm -f $(call objectify, $(clean-files)) | 264 | $(Q)rm -f $(call objectify, $(clean-files)) |
| 274 | $(Q)rm -rf $(call objectify, $(clean-dirs)) | 265 | $(Q)rm -rf $(call objectify, $(clean-dirs)) |
| 275 | 266 | ||
| @@ -161,6 +161,10 @@ X!Edrivers/base/interface.c · 160 unmodified lines | |||
| 161 | !Iinclude/linux/fence.h | 161 | !Iinclude/linux/fence.h |
| 162 | !Edrivers/dma-buf/seqno-fence.c | 162 | !Edrivers/dma-buf/seqno-fence.c |
| 163 | !Iinclude/linux/seqno-fence.h | 163 | !Iinclude/linux/seqno-fence.h |
| 164 | !Edrivers/dma-buf/fence-array.c | ||
| 165 | !Iinclude/linux/fence-array.h | ||
| 166 | !Edrivers/dma-buf/reservation.c | ||
| 167 | !Iinclude/linux/reservation.h | ||
| 164 | !Edrivers/dma-buf/sync_file.c | 168 | !Edrivers/dma-buf/sync_file.c |
| 165 | !Iinclude/linux/sync_file.h | 169 | !Iinclude/linux/sync_file.h |
| 166 | </sect2> | 170 | </sect2> |
| @@ -1,3540 +0,0 @@ | |||
| 1 | <?xml version="1.0" encoding="UTF-8"?> | ||
| 2 | <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" | ||
| 3 | "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []> | ||
| 4 | |||
| 5 | <book id="gpuDevelopersGuide"> | ||
| 6 | <bookinfo> | ||
| 7 | <title>Linux GPU Driver Developer's Guide</title> | ||
| 8 | |||
| 9 | <authorgroup> | ||
| 10 | <author> | ||
| 11 | <firstname>Jesse</firstname> | ||
| 12 | <surname>Barnes</surname> | ||
| 13 | <contrib>Initial version</contrib> | ||
| 14 | <affiliation> | ||
| 15 | <orgname>Intel Corporation</orgname> | ||
| 16 | <address> | ||
| 17 | <email>jesse.barnes@intel.com</email> | ||
| 18 | </address> | ||
| 19 | </affiliation> | ||
| 20 | </author> | ||
| 21 | <author> | ||
| 22 | <firstname>Laurent</firstname> | ||
| 23 | <surname>Pinchart</surname> | ||
| 24 | <contrib>Driver internals</contrib> | ||
| 25 | <affiliation> | ||
| 26 | <orgname>Ideas on board SPRL</orgname> | ||
| 27 | <address> | ||
| 28 | <email>laurent.pinchart@ideasonboard.com</email> | ||
| 29 | </address> | ||
| 30 | </affiliation> | ||
| 31 | </author> | ||
| 32 | <author> | ||
| 33 | <firstname>Daniel</firstname> | ||
| 34 | <surname>Vetter</surname> | ||
| 35 | <contrib>Contributions all over the place</contrib> | ||
| 36 | <affiliation> | ||
| 37 | <orgname>Intel Corporation</orgname> | ||
| 38 | <address> | ||
| 39 | <email>daniel.vetter@ffwll.ch</email> | ||
| 40 | </address> | ||
| 41 | </affiliation> | ||
| 42 | </author> | ||
| 43 | <author> | ||
| 44 | <firstname>Lukas</firstname> | ||
| 45 | <surname>Wunner</surname> | ||
| 46 | <contrib>vga_switcheroo documentation</contrib> | ||
| 47 | <affiliation> | ||
| 48 | <address> | ||
| 49 | <email>lukas@wunner.de</email> | ||
| 50 | </address> | ||
| 51 | </affiliation> | ||
| 52 | </author> | ||
| 53 | </authorgroup> | ||
| 54 | |||
| 55 | <copyright> | ||
| 56 | <year>2008-2009</year> | ||
| 57 | <year>2013-2014</year> | ||
| 58 | <holder>Intel Corporation</holder> | ||
| 59 | </copyright> | ||
| 60 | <copyright> | ||
| 61 | <year>2012</year> | ||
| 62 | <holder>Laurent Pinchart</holder> | ||
| 63 | </copyright> | ||
| 64 | <copyright> | ||
| 65 | <year>2015</year> | ||
| 66 | <holder>Lukas Wunner</holder> | ||
| 67 | </copyright> | ||
| 68 | |||
| 69 | <legalnotice> | ||
| 70 | <para> | ||
| 71 | The contents of this file may be used under the terms of the GNU | ||
| 72 | General Public License version 2 (the "GPL") as distributed in | ||
| 73 | the kernel source COPYING file. | ||
| 74 | </para> | ||
| 75 | </legalnotice> | ||
| 76 | |||
| 77 | <revhistory> | ||
| 78 | <!-- Put document revisions here, newest first. --> | ||
| 79 | <revision> | ||
| 80 | <revnumber>1.0</revnumber> | ||
| 81 | <date>2012-07-13</date> | ||
| 82 | <authorinitials>LP</authorinitials> | ||
| 83 | <revremark>Added extensive documentation about driver internals. | ||
| 84 | </revremark> | ||
| 85 | </revision> | ||
| 86 | <revision> | ||
| 87 | <revnumber>1.1</revnumber> | ||
| 88 | <date>2015-10-11</date> | ||
| 89 | <authorinitials>LW</authorinitials> | ||
| 90 | <revremark>Added vga_switcheroo documentation. | ||
| 91 | </revremark> | ||
| 92 | </revision> | ||
| 93 | </revhistory> | ||
| 94 | </bookinfo> | ||
| 95 | |||
| 96 | <toc></toc> | ||
| 97 | |||
| 98 | <part id="drmCore"> | ||
| 99 | <title>DRM Core</title> | ||
| 100 | <partintro> | ||
| 101 | <para> | ||
| 102 | This first part of the GPU Driver Developer's Guide documents core DRM | ||
| 103 | code, helper libraries for writing drivers and generic userspace | ||
| 104 | interfaces exposed by DRM drivers. | ||
| 105 | </para> | ||
| 106 | </partintro> | ||
| 107 | |||
| 108 | <chapter id="drmIntroduction"> | ||
| 109 | <title>Introduction</title> | ||
| 110 | <para> | ||
| 111 | The Linux DRM layer contains code intended to support the needs | ||
| 112 | of complex graphics devices, usually containing programmable | ||
| 113 | pipelines well suited to 3D graphics acceleration. Graphics | ||
| 114 | drivers in the kernel may make use of DRM functions to make | ||
| 115 | tasks like memory management, interrupt handling and DMA easier, | ||
| 116 | and provide a uniform interface to applications. | ||
| 117 | </para> | ||
| 118 | <para> | ||
| 119 | A note on versions: this guide covers features found in the DRM | ||
| 120 | tree, including the TTM memory manager, output configuration and | ||
| 121 | mode setting, and the new vblank internals, in addition to all | ||
| 122 | the regular features found in current kernels. | ||
| 123 | </para> | ||
| 124 | <para> | ||
| 125 | [Insert diagram of typical DRM stack here] | ||
| 126 | </para> | ||
| 127 | <sect1> | ||
| 128 | <title>Style Guidelines</title> | ||
| 129 | <para> | ||
| 130 | For consistency this documentation uses American English. Abbreviations | ||
| 131 | are written as all-uppercase, for example: DRM, KMS, IOCTL, CRTC, and so | ||
| 132 | on. To aid in reading, documentations make full use of the markup | ||
| 133 | characters kerneldoc provides: @parameter for function parameters, @member | ||
| 134 | for structure members, &structure to reference structures and | ||
| 135 | function() for functions. These all get automatically hyperlinked if | ||
| 136 | kerneldoc for the referenced objects exists. When referencing entries in | ||
| 137 | function vtables please use ->vfunc(). Note that kerneldoc does | ||
| 138 | not support referencing struct members directly, so please add a reference | ||
| 139 | to the vtable struct somewhere in the same paragraph or at least section. | ||
| 140 | </para> | ||
| 141 | <para> | ||
| 142 | Except in special situations (to separate locked from unlocked variants) | ||
| 143 | locking requirements for functions aren't documented in the kerneldoc. | ||
| 144 | Instead locking should be check at runtime using e.g. | ||
| 145 | <code>WARN_ON(!mutex_is_locked(...));</code>. Since it's much easier to | ||
| 146 | ignore documentation than runtime noise this provides more value. And on | ||
| 147 | top of that runtime checks do need to be updated when the locking rules | ||
| 148 | change, increasing the chances that they're correct. Within the | ||
| 149 | documentation the locking rules should be explained in the relevant | ||
| 150 | structures: Either in the comment for the lock explaining what it | ||
| 151 | protects, or data fields need a note about which lock protects them, or | ||
| 152 | both. | ||
| 153 | </para> | ||
| 154 | <para> | ||
| 155 | Functions which have a non-<code>void</code> return value should have a | ||
| 156 | section called "Returns" explaining the expected return values in | ||
| 157 | different cases and their meanings. Currently there's no consensus whether | ||
| 158 | that section name should be all upper-case or not, and whether it should | ||
| 159 | end in a colon or not. Go with the file-local style. Other common section | ||
| 160 | names are "Notes" with information for dangerous or tricky corner cases, | ||
| 161 | and "FIXME" where the interface could be cleaned up. | ||
| 162 | </para> | ||
| 163 | </sect1> | ||
| 164 | </chapter> | ||
| 165 | |||
| 166 | <!-- Internals --> | ||
| 167 | |||
| 168 | <chapter id="drmInternals"> | ||
| 169 | <title>DRM Internals</title> | ||
| 170 | <para> | ||
| 171 | This chapter documents DRM internals relevant to driver authors | ||
| 172 | and developers working to add support for the latest features to | ||
| 173 | existing drivers. | ||
| 174 | </para> | ||
| 175 | <para> | ||
| 176 | First, we go over some typical driver initialization | ||
| 177 | requirements, like setting up command buffers, creating an | ||
| 178 | initial output configuration, and initializing core services. | ||
| 179 | Subsequent sections cover core internals in more detail, | ||
| 180 | providing implementation notes and examples. | ||
| 181 | </para> | ||
| 182 | <para> | ||
| 183 | The DRM layer provides several services to graphics drivers, | ||
| 184 | many of them driven by the application interfaces it provides | ||
| 185 | through libdrm, the library that wraps most of the DRM ioctls. | ||
| 186 | These include vblank event handling, memory | ||
| 187 | management, output management, framebuffer management, command | ||
| 188 | submission & fencing, suspend/resume support, and DMA | ||
| 189 | services. | ||
| 190 | </para> | ||
| 191 | |||
| 192 | <!-- Internals: driver init --> | ||
| 193 | |||
| 194 | <sect1> | ||
| 195 | <title>Driver Initialization</title> | ||
| 196 | <para> | ||
| 197 | At the core of every DRM driver is a <structname>drm_driver</structname> | ||
| 198 | structure. Drivers typically statically initialize a drm_driver structure, | ||
| 199 | and then pass it to <function>drm_dev_alloc()</function> to allocate a | ||
| 200 | device instance. After the device instance is fully initialized it can be | ||
| 201 | registered (which makes it accessible from userspace) using | ||
| 202 | <function>drm_dev_register()</function>. | ||
| 203 | </para> | ||
| 204 | <para> | ||
| 205 | The <structname>drm_driver</structname> structure contains static | ||
| 206 | information that describes the driver and features it supports, and | ||
| 207 | pointers to methods that the DRM core will call to implement the DRM API. | ||
| 208 | We will first go through the <structname>drm_driver</structname> static | ||
| 209 | information fields, and will then describe individual operations in | ||
| 210 | details as they get used in later sections. | ||
| 211 | </para> | ||
| 212 | <sect2> | ||
| 213 | <title>Driver Information</title> | ||
| 214 | <sect3> | ||
| 215 | <title>Driver Features</title> | ||
| 216 | <para> | ||
| 217 | Drivers inform the DRM core about their requirements and supported | ||
| 218 | features by setting appropriate flags in the | ||
| 219 | <structfield>driver_features</structfield> field. Since those flags | ||
| 220 | influence the DRM core behaviour since registration time, most of them | ||
| 221 | must be set to registering the <structname>drm_driver</structname> | ||
| 222 | instance. | ||
| 223 | </para> | ||
| 224 | <synopsis>u32 driver_features;</synopsis> | ||
| 225 | <variablelist> | ||
| 226 | <title>Driver Feature Flags</title> | ||
| 227 | <varlistentry> | ||
| 228 | <term>DRIVER_USE_AGP</term> | ||
| 229 | <listitem><para> | ||
| 230 | Driver uses AGP interface, the DRM core will manage AGP resources. | ||
| 231 | </para></listitem> | ||
| 232 | </varlistentry> | ||
| 233 | <varlistentry> | ||
| 234 | <term>DRIVER_REQUIRE_AGP</term> | ||
| 235 | <listitem><para> | ||
| 236 | Driver needs AGP interface to function. AGP initialization failure | ||
| 237 | will become a fatal error. | ||
| 238 | </para></listitem> | ||
| 239 | </varlistentry> | ||
| 240 | <varlistentry> | ||
| 241 | <term>DRIVER_PCI_DMA</term> | ||
| 242 | <listitem><para> | ||
| 243 | Driver is capable of PCI DMA, mapping of PCI DMA buffers to | ||
| 244 | userspace will be enabled. Deprecated. | ||
| 245 | </para></listitem> | ||
| 246 | </varlistentry> | ||
| 247 | <varlistentry> | ||
| 248 | <term>DRIVER_SG</term> | ||
| 249 | <listitem><para> | ||
| 250 | Driver can perform scatter/gather DMA, allocation and mapping of | ||
| 251 | scatter/gather buffers will be enabled. Deprecated. | ||
| 252 | </para></listitem> | ||
| 253 | </varlistentry> | ||
| 254 | <varlistentry> | ||
| 255 | <term>DRIVER_HAVE_DMA</term> | ||
| 256 | <listitem><para> | ||
| 257 | Driver supports DMA, the userspace DMA API will be supported. | ||
| 258 | Deprecated. | ||
| 259 | </para></listitem> | ||
| 260 | </varlistentry> | ||
| 261 | <varlistentry> | ||
| 262 | <term>DRIVER_HAVE_IRQ</term><term>DRIVER_IRQ_SHARED</term> | ||
| 263 | <listitem><para> | ||
| 264 | DRIVER_HAVE_IRQ indicates whether the driver has an IRQ handler | ||
| 265 | managed by the DRM Core. The core will support simple IRQ handler | ||
| 266 | installation when the flag is set. The installation process is | ||
| 267 | described in <xref linkend="drm-irq-registration"/>.</para> | ||
| 268 | <para>DRIVER_IRQ_SHARED indicates whether the device & handler | ||
| 269 | support shared IRQs (note that this is required of PCI drivers). | ||
| 270 | </para></listitem> | ||
| 271 | </varlistentry> | ||
| 272 | <varlistentry> | ||
| 273 | <term>DRIVER_GEM</term> | ||
| 274 | <listitem><para> | ||
| 275 | Driver use the GEM memory manager. | ||
| 276 | </para></listitem> | ||
| 277 | </varlistentry> | ||
| 278 | <varlistentry> | ||
| 279 | <term>DRIVER_MODESET</term> | ||
| 280 | <listitem><para> | ||
| 281 | Driver supports mode setting interfaces (KMS). | ||
| 282 | </para></listitem> | ||
| 283 | </varlistentry> | ||
| 284 | <varlistentry> | ||
| 285 | <term>DRIVER_PRIME</term> | ||
| 286 | <listitem><para> | ||
| 287 | Driver implements DRM PRIME buffer sharing. | ||
| 288 | </para></listitem> | ||
| 289 | </varlistentry> | ||
| 290 | <varlistentry> | ||
| 291 | <term>DRIVER_RENDER</term> | ||
| 292 | <listitem><para> | ||
| 293 | Driver supports dedicated render nodes. | ||
| 294 | </para></listitem> | ||
| 295 | </varlistentry> | ||
| 296 | <varlistentry> | ||
| 297 | <term>DRIVER_ATOMIC</term> | ||
| 298 | <listitem><para> | ||
| 299 | Driver supports atomic properties. In this case the driver | ||
| 300 | must implement appropriate obj->atomic_get_property() vfuncs | ||
| 301 | for any modeset objects with driver specific properties. | ||
| 302 | </para></listitem> | ||
| 303 | </varlistentry> | ||
| 304 | </variablelist> | ||
| 305 | </sect3> | ||
| 306 | <sect3> | ||
| 307 | <title>Major, Minor and Patchlevel</title> | ||
| 308 | <synopsis>int major; | ||
| 309 | int minor; | ||
| 310 | int patchlevel;</synopsis> | ||
| 311 | <para> | ||
| 312 | The DRM core identifies driver versions by a major, minor and patch | ||
| 313 | level triplet. The information is printed to the kernel log at | ||
| 314 | initialization time and passed to userspace through the | ||
| 315 | DRM_IOCTL_VERSION ioctl. | ||
| 316 | </para> | ||
| 317 | <para> | ||
| 318 | The major and minor numbers are also used to verify the requested driver | ||
| 319 | API version passed to DRM_IOCTL_SET_VERSION. When the driver API changes | ||
| 320 | between minor versions, applications can call DRM_IOCTL_SET_VERSION to | ||
| 321 | select a specific version of the API. If the requested major isn't equal | ||
| 322 | to the driver major, or the requested minor is larger than the driver | ||
| 323 | minor, the DRM_IOCTL_SET_VERSION call will return an error. Otherwise | ||
| 324 | the driver's set_version() method will be called with the requested | ||
| 325 | version. | ||
| 326 | </para> | ||
| 327 | </sect3> | ||
| 328 | <sect3> | ||
| 329 | <title>Name, Description and Date</title> | ||
| 330 | <synopsis>char *name; | ||
| 331 | char *desc; | ||
| 332 | char *date;</synopsis> | ||
| 333 | <para> | ||
| 334 | The driver name is printed to the kernel log at initialization time, | ||
| 335 | used for IRQ registration and passed to userspace through | ||
| 336 | DRM_IOCTL_VERSION. | ||
| 337 | </para> | ||
| 338 | <para> | ||
| 339 | The driver description is a purely informative string passed to | ||
| 340 | userspace through the DRM_IOCTL_VERSION ioctl and otherwise unused by | ||
| 341 | the kernel. | ||
| 342 | </para> | ||
| 343 | <para> | ||
| 344 | The driver date, formatted as YYYYMMDD, is meant to identify the date of | ||
| 345 | the latest modification to the driver. However, as most drivers fail to | ||
| 346 | update it, its value is mostly useless. The DRM core prints it to the | ||
| 347 | kernel log at initialization time and passes it to userspace through the | ||
| 348 | DRM_IOCTL_VERSION ioctl. | ||
| 349 | </para> | ||
| 350 | </sect3> | ||
| 351 | </sect2> | ||
| 352 | <sect2> | ||
| 353 | <title>Device Instance and Driver Handling</title> | ||
| 354 | !Pdrivers/gpu/drm/drm_drv.c driver instance overview | ||
| 355 | !Edrivers/gpu/drm/drm_drv.c | ||
| 356 | </sect2> | ||
| 357 | <sect2> | ||
| 358 | <title>Driver Load</title> | ||
| 359 | <sect3 id="drm-irq-registration"> | ||
| 360 | <title>IRQ Registration</title> | ||
| 361 | <para> | ||
| 362 | The DRM core tries to facilitate IRQ handler registration and | ||
| 363 | unregistration by providing <function>drm_irq_install</function> and | ||
| 364 | <function>drm_irq_uninstall</function> functions. Those functions only | ||
| 365 | support a single interrupt per device, devices that use more than one | ||
| 366 | IRQs need to be handled manually. | ||
| 367 | </para> | ||
| 368 | <sect4> | ||
| 369 | <title>Managed IRQ Registration</title> | ||
| 370 | <para> | ||
| 371 | <function>drm_irq_install</function> starts by calling the | ||
| 372 | <methodname>irq_preinstall</methodname> driver operation. The operation | ||
| 373 | is optional and must make sure that the interrupt will not get fired by | ||
| 374 | clearing all pending interrupt flags or disabling the interrupt. | ||
| 375 | </para> | ||
| 376 | <para> | ||
| 377 | The passed-in IRQ will then be requested by a call to | ||
| 378 | <function>request_irq</function>. If the DRIVER_IRQ_SHARED driver | ||
| 379 | feature flag is set, a shared (IRQF_SHARED) IRQ handler will be | ||
| 380 | requested. | ||
| 381 | </para> | ||
| 382 | <para> | ||
| 383 | The IRQ handler function must be provided as the mandatory irq_handler | ||
| 384 | driver operation. It will get passed directly to | ||
| 385 | <function>request_irq</function> and thus has the same prototype as all | ||
| 386 | IRQ handlers. It will get called with a pointer to the DRM device as the | ||
| 387 | second argument. | ||
| 388 | </para> | ||
| 389 | <para> | ||
| 390 | Finally the function calls the optional | ||
| 391 | <methodname>irq_postinstall</methodname> driver operation. The operation | ||
| 392 | usually enables interrupts (excluding the vblank interrupt, which is | ||
| 393 | enabled separately), but drivers may choose to enable/disable interrupts | ||
| 394 | at a different time. | ||
| 395 | </para> | ||
| 396 | <para> | ||
| 397 | <function>drm_irq_uninstall</function> is similarly used to uninstall an | ||
| 398 | IRQ handler. It starts by waking up all processes waiting on a vblank | ||
| 399 | interrupt to make sure they don't hang, and then calls the optional | ||
| 400 | <methodname>irq_uninstall</methodname> driver operation. The operation | ||
| 401 | must disable all hardware interrupts. Finally the function frees the IRQ | ||
| 402 | by calling <function>free_irq</function>. | ||
| 403 | </para> | ||
| 404 | </sect4> | ||
| 405 | <sect4> | ||
| 406 | <title>Manual IRQ Registration</title> | ||
| 407 | <para> | ||
| 408 | Drivers that require multiple interrupt handlers can't use the managed | ||
| 409 | IRQ registration functions. In that case IRQs must be registered and | ||
| 410 | unregistered manually (usually with the <function>request_irq</function> | ||
| 411 | and <function>free_irq</function> functions, or their devm_* equivalent). | ||
| 412 | </para> | ||
| 413 | <para> | ||
| 414 | When manually registering IRQs, drivers must not set the DRIVER_HAVE_IRQ | ||
| 415 | driver feature flag, and must not provide the | ||
| 416 | <methodname>irq_handler</methodname> driver operation. They must set the | ||
| 417 | <structname>drm_device</structname> <structfield>irq_enabled</structfield> | ||
| 418 | field to 1 upon registration of the IRQs, and clear it to 0 after | ||
| 419 | unregistering the IRQs. | ||
| 420 | </para> | ||
| 421 | </sect4> | ||
| 422 | </sect3> | ||
| 423 | <sect3> | ||
| 424 | <title>Memory Manager Initialization</title> | ||
| 425 | <para> | ||
| 426 | Every DRM driver requires a memory manager which must be initialized at | ||
| 427 | load time. DRM currently contains two memory managers, the Translation | ||
| 428 | Table Manager (TTM) and the Graphics Execution Manager (GEM). | ||
| 429 | This document describes the use of the GEM memory manager only. See | ||
| 430 | <xref linkend="drm-memory-management"/> for details. | ||
| 431 | </para> | ||
| 432 | </sect3> | ||
| 433 | <sect3> | ||
| 434 | <title>Miscellaneous Device Configuration</title> | ||
| 435 | <para> | ||
| 436 | Another task that may be necessary for PCI devices during configuration | ||
| 437 | is mapping the video BIOS. On many devices, the VBIOS describes device | ||
| 438 | configuration, LCD panel timings (if any), and contains flags indicating | ||
| 439 | device state. Mapping the BIOS can be done using the pci_map_rom() call, | ||
| 440 | a convenience function that takes care of mapping the actual ROM, | ||
| 441 | whether it has been shadowed into memory (typically at address 0xc0000) | ||
| 442 | or exists on the PCI device in the ROM BAR. Note that after the ROM has | ||
| 443 | been mapped and any necessary information has been extracted, it should | ||
| 444 | be unmapped; on many devices, the ROM address decoder is shared with | ||
| 445 | other BARs, so leaving it mapped could cause undesired behaviour like | ||
| 446 | hangs or memory corruption. | ||
| 447 | <!--!Fdrivers/pci/rom.c pci_map_rom--> | ||
| 448 | </para> | ||
| 449 | </sect3> | ||
| 450 | </sect2> | ||
| 451 | <sect2> | ||
| 452 | <title>Bus-specific Device Registration and PCI Support</title> | ||
| 453 | <para> | ||
| 454 | A number of functions are provided to help with device registration. | ||
| 455 | The functions deal with PCI and platform devices respectively and are | ||
| 456 | only provided for historical reasons. These are all deprecated and | ||
| 457 | shouldn't be used in new drivers. Besides that there's a few | ||
| 458 | helpers for pci drivers. | ||
| 459 | </para> | ||
| 460 | !Edrivers/gpu/drm/drm_pci.c | ||
| 461 | !Edrivers/gpu/drm/drm_platform.c | ||
| 462 | </sect2> | ||
| 463 | </sect1> | ||
| 464 | |||
| 465 | <!-- Internals: memory management --> | ||
| 466 | |||
| 467 | <sect1 id="drm-memory-management"> | ||
| 468 | <title>Memory management</title> | ||
| 469 | <para> | ||
| 470 | Modern Linux systems require large amount of graphics memory to store | ||
| 471 | frame buffers, textures, vertices and other graphics-related data. Given | ||
| 472 | the very dynamic nature of many of that data, managing graphics memory | ||
| 473 | efficiently is thus crucial for the graphics stack and plays a central | ||
| 474 | role in the DRM infrastructure. | ||
| 475 | </para> | ||
| 476 | <para> | ||
| 477 | The DRM core includes two memory managers, namely Translation Table Maps | ||
| 478 | (TTM) and Graphics Execution Manager (GEM). TTM was the first DRM memory | ||
| 479 | manager to be developed and tried to be a one-size-fits-them all | ||
| 480 | solution. It provides a single userspace API to accommodate the need of | ||
| 481 | all hardware, supporting both Unified Memory Architecture (UMA) devices | ||
| 482 | and devices with dedicated video RAM (i.e. most discrete video cards). | ||
| 483 | This resulted in a large, complex piece of code that turned out to be | ||
| 484 | hard to use for driver development. | ||
| 485 | </para> | ||
| 486 | <para> | ||
| 487 | GEM started as an Intel-sponsored project in reaction to TTM's | ||
| 488 | complexity. Its design philosophy is completely different: instead of | ||
| 489 | providing a solution to every graphics memory-related problems, GEM | ||
| 490 | identified common code between drivers and created a support library to | ||
| 491 | share it. GEM has simpler initialization and execution requirements than | ||
| 492 | TTM, but has no video RAM management capabilities and is thus limited to | ||
| 493 | UMA devices. | ||
| 494 | </para> | ||
| 495 | <sect2> | ||
| 496 | <title>The Translation Table Manager (TTM)</title> | ||
| 497 | <para> | ||
| 498 | TTM design background and information belongs here. | ||
| 499 | </para> | ||
| 500 | <sect3> | ||
| 501 | <title>TTM initialization</title> | ||
| 502 | <warning><para>This section is outdated.</para></warning> | ||
| 503 | <para> | ||
| 504 | Drivers wishing to support TTM must fill out a drm_bo_driver | ||
| 505 | structure. The structure contains several fields with function | ||
| 506 | pointers for initializing the TTM, allocating and freeing memory, | ||
| 507 | waiting for command completion and fence synchronization, and memory | ||
| 508 | migration. See the radeon_ttm.c file for an example of usage. | ||
| 509 | </para> | ||
| 510 | <para> | ||
| 511 | The ttm_global_reference structure is made up of several fields: | ||
| 512 | </para> | ||
| 513 | <programlisting> | ||
| 514 | struct ttm_global_reference { | ||
| 515 | enum ttm_global_types global_type; | ||
| 516 | size_t size; | ||
| 517 | void *object; | ||
| 518 | int (*init) (struct ttm_global_reference *); | ||
| 519 | void (*release) (struct ttm_global_reference *); | ||
| 520 | }; | ||
| 521 | </programlisting> | ||
| 522 | <para> | ||
| 523 | There should be one global reference structure for your memory | ||
| 524 | manager as a whole, and there will be others for each object | ||
| 525 | created by the memory manager at runtime. Your global TTM should | ||
| 526 | have a type of TTM_GLOBAL_TTM_MEM. The size field for the global | ||
| 527 | object should be sizeof(struct ttm_mem_global), and the init and | ||
| 528 | release hooks should point at your driver-specific init and | ||
| 529 | release routines, which probably eventually call | ||
| 530 | ttm_mem_global_init and ttm_mem_global_release, respectively. | ||
| 531 | </para> | ||
| 532 | <para> | ||
| 533 | Once your global TTM accounting structure is set up and initialized | ||
| 534 | by calling ttm_global_item_ref() on it, | ||
| 535 | you need to create a buffer object TTM to | ||
| 536 | provide a pool for buffer object allocation by clients and the | ||
| 537 | kernel itself. The type of this object should be TTM_GLOBAL_TTM_BO, | ||
| 538 | and its size should be sizeof(struct ttm_bo_global). Again, | ||
| 539 | driver-specific init and release functions may be provided, | ||
| 540 | likely eventually calling ttm_bo_global_init() and | ||
| 541 | ttm_bo_global_release(), respectively. Also, like the previous | ||
| 542 | object, ttm_global_item_ref() is used to create an initial reference | ||
| 543 | count for the TTM, which will call your initialization function. | ||
| 544 | </para> | ||
| 545 | </sect3> | ||
| 546 | </sect2> | ||
| 547 | <sect2 id="drm-gem"> | ||
| 548 | <title>The Graphics Execution Manager (GEM)</title> | ||
| 549 | <para> | ||
| 550 | The GEM design approach has resulted in a memory manager that doesn't | ||
| 551 | provide full coverage of all (or even all common) use cases in its | ||
| 552 | userspace or kernel API. GEM exposes a set of standard memory-related | ||
| 553 | operations to userspace and a set of helper functions to drivers, and let | ||
| 554 | drivers implement hardware-specific operations with their own private API. | ||
| 555 | </para> | ||
| 556 | <para> | ||
| 557 | The GEM userspace API is described in the | ||
| 558 | <ulink url="http://lwn.net/Articles/283798/"><citetitle>GEM - the Graphics | ||
| 559 | Execution Manager</citetitle></ulink> article on LWN. While slightly | ||
| 560 | outdated, the document provides a good overview of the GEM API principles. | ||
| 561 | Buffer allocation and read and write operations, described as part of the | ||
| 562 | common GEM API, are currently implemented using driver-specific ioctls. | ||
| 563 | </para> | ||
| 564 | <para> | ||
| 565 | GEM is data-agnostic. It manages abstract buffer objects without knowing | ||
| 566 | what individual buffers contain. APIs that require knowledge of buffer | ||
| 567 | contents or purpose, such as buffer allocation or synchronization | ||
| 568 | primitives, are thus outside of the scope of GEM and must be implemented | ||
| 569 | using driver-specific ioctls. | ||
| 570 | </para> | ||
| 571 | <para> | ||
| 572 | On a fundamental level, GEM involves several operations: | ||
| 573 | <itemizedlist> | ||
| 574 | <listitem>Memory allocation and freeing</listitem> | ||
| 575 | <listitem>Command execution</listitem> | ||
| 576 | <listitem>Aperture management at command execution time</listitem> | ||
| 577 | </itemizedlist> | ||
| 578 | Buffer object allocation is relatively straightforward and largely | ||
| 579 | provided by Linux's shmem layer, which provides memory to back each | ||
| 580 | object. | ||
| 581 | </para> | ||
| 582 | <para> | ||
| 583 | Device-specific operations, such as command execution, pinning, buffer | ||
| 584 | read & write, mapping, and domain ownership transfers are left to | ||
| 585 | driver-specific ioctls. | ||
| 586 | </para> | ||
| 587 | <sect3> | ||
| 588 | <title>GEM Initialization</title> | ||
| 589 | <para> | ||
| 590 | Drivers that use GEM must set the DRIVER_GEM bit in the struct | ||
| 591 | <structname>drm_driver</structname> | ||
| 592 | <structfield>driver_features</structfield> field. The DRM core will | ||
| 593 | then automatically initialize the GEM core before calling the | ||
| 594 | <methodname>load</methodname> operation. Behind the scene, this will | ||
| 595 | create a DRM Memory Manager object which provides an address space | ||
| 596 | pool for object allocation. | ||
| 597 | </para> | ||
| 598 | <para> | ||
| 599 | In a KMS configuration, drivers need to allocate and initialize a | ||
| 600 | command ring buffer following core GEM initialization if required by | ||
| 601 | the hardware. UMA devices usually have what is called a "stolen" | ||
| 602 | memory region, which provides space for the initial framebuffer and | ||
| 603 | large, contiguous memory regions required by the device. This space is | ||
| 604 | typically not managed by GEM, and must be initialized separately into | ||
| 605 | its own DRM MM object. | ||
| 606 | </para> | ||
| 607 | </sect3> | ||
| 608 | <sect3> | ||
| 609 | <title>GEM Objects Creation</title> | ||
| 610 | <para> | ||
| 611 | GEM splits creation of GEM objects and allocation of the memory that | ||
| 612 | backs them in two distinct operations. | ||
| 613 | </para> | ||
| 614 | <para> | ||
| 615 | GEM objects are represented by an instance of struct | ||
| 616 | <structname>drm_gem_object</structname>. Drivers usually need to extend | ||
| 617 | GEM objects with private information and thus create a driver-specific | ||
| 618 | GEM object structure type that embeds an instance of struct | ||
| 619 | <structname>drm_gem_object</structname>. | ||
| 620 | </para> | ||
| 621 | <para> | ||
| 622 | To create a GEM object, a driver allocates memory for an instance of its | ||
| 623 | specific GEM object type and initializes the embedded struct | ||
| 624 | <structname>drm_gem_object</structname> with a call to | ||
| 625 | <function>drm_gem_object_init</function>. The function takes a pointer to | ||
| 626 | the DRM device, a pointer to the GEM object and the buffer object size | ||
| 627 | in bytes. | ||
| 628 | </para> | ||
| 629 | <para> | ||
| 630 | GEM uses shmem to allocate anonymous pageable memory. | ||
| 631 | <function>drm_gem_object_init</function> will create an shmfs file of | ||
| 632 | the requested size and store it into the struct | ||
| 633 | <structname>drm_gem_object</structname> <structfield>filp</structfield> | ||
| 634 | field. The memory is used as either main storage for the object when the | ||
| 635 | graphics hardware uses system memory directly or as a backing store | ||
| 636 | otherwise. | ||
| 637 | </para> | ||
| 638 | <para> | ||
| 639 | Drivers are responsible for the actual physical pages allocation by | ||
| 640 | calling <function>shmem_read_mapping_page_gfp</function> for each page. | ||
| 641 | Note that they can decide to allocate pages when initializing the GEM | ||
| 642 | object, or to delay allocation until the memory is needed (for instance | ||
| 643 | when a page fault occurs as a result of a userspace memory access or | ||
| 644 | when the driver needs to start a DMA transfer involving the memory). | ||
| 645 | </para> | ||
| 646 | <para> | ||
| 647 | Anonymous pageable memory allocation is not always desired, for instance | ||
| 648 | when the hardware requires physically contiguous system memory as is | ||
| 649 | often the case in embedded devices. Drivers can create GEM objects with | ||
| 650 | no shmfs backing (called private GEM objects) by initializing them with | ||
| 651 | a call to <function>drm_gem_private_object_init</function> instead of | ||
| 652 | <function>drm_gem_object_init</function>. Storage for private GEM | ||
| 653 | objects must be managed by drivers. | ||
| 654 | </para> | ||
| 655 | </sect3> | ||
| 656 | <sect3> | ||
| 657 | <title>GEM Objects Lifetime</title> | ||
| 658 | <para> | ||
| 659 | All GEM objects are reference-counted by the GEM core. References can be | ||
| 660 | acquired and release by <function>calling drm_gem_object_reference</function> | ||
| 661 | and <function>drm_gem_object_unreference</function> respectively. The | ||
| 662 | caller must hold the <structname>drm_device</structname> | ||
| 663 | <structfield>struct_mutex</structfield> lock when calling | ||
| 664 | <function>drm_gem_object_reference</function>. As a convenience, GEM | ||
| 665 | provides <function>drm_gem_object_unreference_unlocked</function> | ||
| 666 | functions that can be called without holding the lock. | ||
| 667 | </para> | ||
| 668 | <para> | ||
| 669 | When the last reference to a GEM object is released the GEM core calls | ||
| 670 | the <structname>drm_driver</structname> | ||
| 671 | <methodname>gem_free_object</methodname> operation. That operation is | ||
| 672 | mandatory for GEM-enabled drivers and must free the GEM object and all | ||
| 673 | associated resources. | ||
| 674 | </para> | ||
| 675 | <para> | ||
| 676 | <synopsis>void (*gem_free_object) (struct drm_gem_object *obj);</synopsis> | ||
| 677 | Drivers are responsible for freeing all GEM object resources. This includes | ||
| 678 | the resources created by the GEM core, which need to be released with | ||
| 679 | <function>drm_gem_object_release</function>. | ||
| 680 | </para> | ||
| 681 | </sect3> | ||
| 682 | <sect3> | ||
| 683 | <title>GEM Objects Naming</title> | ||
| 684 | <para> | ||
| 685 | Communication between userspace and the kernel refers to GEM objects | ||
| 686 | using local handles, global names or, more recently, file descriptors. | ||
| 687 | All of those are 32-bit integer values; the usual Linux kernel limits | ||
| 688 | apply to the file descriptors. | ||
| 689 | </para> | ||
| 690 | <para> | ||
| 691 | GEM handles are local to a DRM file. Applications get a handle to a GEM | ||
| 692 | object through a driver-specific ioctl, and can use that handle to refer | ||
| 693 | to the GEM object in other standard or driver-specific ioctls. Closing a | ||
| 694 | DRM file handle frees all its GEM handles and dereferences the | ||
| 695 | associated GEM objects. | ||
| 696 | </para> | ||
| 697 | <para> | ||
| 698 | To create a handle for a GEM object drivers call | ||
| 699 | <function>drm_gem_handle_create</function>. The function takes a pointer | ||
| 700 | to the DRM file and the GEM object and returns a locally unique handle. | ||
| 701 | When the handle is no longer needed drivers delete it with a call to | ||
| 702 | <function>drm_gem_handle_delete</function>. Finally the GEM object | ||
| 703 | associated with a handle can be retrieved by a call to | ||
| 704 | <function>drm_gem_object_lookup</function>. | ||
| 705 | </para> | ||
| 706 | <para> | ||
| 707 | Handles don't take ownership of GEM objects, they only take a reference | ||
| 708 | to the object that will be dropped when the handle is destroyed. To | ||
| 709 | avoid leaking GEM objects, drivers must make sure they drop the | ||
| 710 | reference(s) they own (such as the initial reference taken at object | ||
| 711 | creation time) as appropriate, without any special consideration for the | ||
| 712 | handle. For example, in the particular case of combined GEM object and | ||
| 713 | handle creation in the implementation of the | ||
| 714 | <methodname>dumb_create</methodname> operation, drivers must drop the | ||
| 715 | initial reference to the GEM object before returning the handle. | ||
| 716 | </para> | ||
| 717 | <para> | ||
| 718 | GEM names are similar in purpose to handles but are not local to DRM | ||
| 719 | files. They can be passed between processes to reference a GEM object | ||
| 720 | globally. Names can't be used directly to refer to objects in the DRM | ||
| 721 | API, applications must convert handles to names and names to handles | ||
| 722 | using the DRM_IOCTL_GEM_FLINK and DRM_IOCTL_GEM_OPEN ioctls | ||
| 723 | respectively. The conversion is handled by the DRM core without any | ||
| 724 | driver-specific support. | ||
| 725 | </para> | ||
| 726 | <para> | ||
| 727 | GEM also supports buffer sharing with dma-buf file descriptors through | ||
| 728 | PRIME. GEM-based drivers must use the provided helpers functions to | ||
| 729 | implement the exporting and importing correctly. See <xref linkend="drm-prime-support" />. | ||
| 730 | Since sharing file descriptors is inherently more secure than the | ||
| 731 | easily guessable and global GEM names it is the preferred buffer | ||
| 732 | sharing mechanism. Sharing buffers through GEM names is only supported | ||
| 733 | for legacy userspace. Furthermore PRIME also allows cross-device | ||
| 734 | buffer sharing since it is based on dma-bufs. | ||
| 735 | </para> | ||
| 736 | </sect3> | ||
| 737 | <sect3 id="drm-gem-objects-mapping"> | ||
| 738 | <title>GEM Objects Mapping</title> | ||
| 739 | <para> | ||
| 740 | Because mapping operations are fairly heavyweight GEM favours | ||
| 741 | read/write-like access to buffers, implemented through driver-specific | ||
| 742 | ioctls, over mapping buffers to userspace. However, when random access | ||
| 743 | to the buffer is needed (to perform software rendering for instance), | ||
| 744 | direct access to the object can be more efficient. | ||
| 745 | </para> | ||
| 746 | <para> | ||
| 747 | The mmap system call can't be used directly to map GEM objects, as they | ||
| 748 | don't have their own file handle. Two alternative methods currently | ||
| 749 | co-exist to map GEM objects to userspace. The first method uses a | ||
| 750 | driver-specific ioctl to perform the mapping operation, calling | ||
| 751 | <function>do_mmap</function> under the hood. This is often considered | ||
| 752 | dubious, seems to be discouraged for new GEM-enabled drivers, and will | ||
| 753 | thus not be described here. | ||
| 754 | </para> | ||
| 755 | <para> | ||
| 756 | The second method uses the mmap system call on the DRM file handle. | ||
| 757 | <synopsis>void *mmap(void *addr, size_t length, int prot, int flags, int fd, | ||
| 758 | off_t offset);</synopsis> | ||
| 759 | DRM identifies the GEM object to be mapped by a fake offset passed | ||
| 760 | through the mmap offset argument. Prior to being mapped, a GEM object | ||
| 761 | must thus be associated with a fake offset. To do so, drivers must call | ||
| 762 | <function>drm_gem_create_mmap_offset</function> on the object. | ||
| 763 | </para> | ||
| 764 | <para> | ||
| 765 | Once allocated, the fake offset value | ||
| 766 | must be passed to the application in a driver-specific way and can then | ||
| 767 | be used as the mmap offset argument. | ||
| 768 | </para> | ||
| 769 | <para> | ||
| 770 | The GEM core provides a helper method <function>drm_gem_mmap</function> | ||
| 771 | to handle object mapping. The method can be set directly as the mmap | ||
| 772 | file operation handler. It will look up the GEM object based on the | ||
| 773 | offset value and set the VMA operations to the | ||
| 774 | <structname>drm_driver</structname> <structfield>gem_vm_ops</structfield> | ||
| 775 | field. Note that <function>drm_gem_mmap</function> doesn't map memory to | ||
| 776 | userspace, but relies on the driver-provided fault handler to map pages | ||
| 777 | individually. | ||
| 778 | </para> | ||
| 779 | <para> | ||
| 780 | To use <function>drm_gem_mmap</function>, drivers must fill the struct | ||
| 781 | <structname>drm_driver</structname> <structfield>gem_vm_ops</structfield> | ||
| 782 | field with a pointer to VM operations. | ||
| 783 | </para> | ||
| 784 | <para> | ||
| 785 | <synopsis>struct vm_operations_struct *gem_vm_ops | ||
| 786 | |||
| 787 | struct vm_operations_struct { | ||
| 788 | void (*open)(struct vm_area_struct * area); | ||
| 789 | void (*close)(struct vm_area_struct * area); | ||
| 790 | int (*fault)(struct vm_area_struct *vma, struct vm_fault *vmf); | ||
| 791 | };</synopsis> | ||
| 792 | </para> | ||
| 793 | <para> | ||
| 794 | The <methodname>open</methodname> and <methodname>close</methodname> | ||
| 795 | operations must update the GEM object reference count. Drivers can use | ||
| 796 | the <function>drm_gem_vm_open</function> and | ||
| 797 | <function>drm_gem_vm_close</function> helper functions directly as open | ||
| 798 | and close handlers. | ||
| 799 | </para> | ||
| 800 | <para> | ||
| 801 | The fault operation handler is responsible for mapping individual pages | ||
| 802 | to userspace when a page fault occurs. Depending on the memory | ||
| 803 | allocation scheme, drivers can allocate pages at fault time, or can | ||
| 804 | decide to allocate memory for the GEM object at the time the object is | ||
| 805 | created. | ||
| 806 | </para> | ||
| 807 | <para> | ||
| 808 | Drivers that want to map the GEM object upfront instead of handling page | ||
| 809 | faults can implement their own mmap file operation handler. | ||
| 810 | </para> | ||
| 811 | </sect3> | ||
| 812 | <sect3> | ||
| 813 | <title>Memory Coherency</title> | ||
| 814 | <para> | ||
| 815 | When mapped to the device or used in a command buffer, backing pages | ||
| 816 | for an object are flushed to memory and marked write combined so as to | ||
| 817 | be coherent with the GPU. Likewise, if the CPU accesses an object | ||
| 818 | after the GPU has finished rendering to the object, then the object | ||
| 819 | must be made coherent with the CPU's view of memory, usually involving | ||
| 820 | GPU cache flushing of various kinds. This core CPU<->GPU | ||
| 821 | coherency management is provided by a device-specific ioctl, which | ||
| 822 | evaluates an object's current domain and performs any necessary | ||
| 823 | flushing or synchronization to put the object into the desired | ||
| 824 | coherency domain (note that the object may be busy, i.e. an active | ||
| 825 | render target; in that case, setting the domain blocks the client and | ||
| 826 | waits for rendering to complete before performing any necessary | ||
| 827 | flushing operations). | ||
| 828 | </para> | ||
| 829 | </sect3> | ||
| 830 | <sect3> | ||
| 831 | <title>Command Execution</title> | ||
| 832 | <para> | ||
| 833 | Perhaps the most important GEM function for GPU devices is providing a | ||
| 834 | command execution interface to clients. Client programs construct | ||
| 835 | command buffers containing references to previously allocated memory | ||
| 836 | objects, and then submit them to GEM. At that point, GEM takes care to | ||
| 837 | bind all the objects into the GTT, execute the buffer, and provide | ||
| 838 | necessary synchronization between clients accessing the same buffers. | ||
| 839 | This often involves evicting some objects from the GTT and re-binding | ||
| 840 | others (a fairly expensive operation), and providing relocation | ||
| 841 | support which hides fixed GTT offsets from clients. Clients must take | ||
| 842 | care not to submit command buffers that reference more objects than | ||
| 843 | can fit in the GTT; otherwise, GEM will reject them and no rendering | ||
| 844 | will occur. Similarly, if several objects in the buffer require fence | ||
| 845 | registers to be allocated for correct rendering (e.g. 2D blits on | ||
| 846 | pre-965 chips), care must be taken not to require more fence registers | ||
| 847 | than are available to the client. Such resource management should be | ||
| 848 | abstracted from the client in libdrm. | ||
| 849 | </para> | ||
| 850 | </sect3> | ||
| 851 | </sect2> | ||
| 852 | <sect2> | ||
| 853 | <title>GEM Function Reference</title> | ||
| 854 | !Edrivers/gpu/drm/drm_gem.c | ||
| 855 | !Iinclude/drm/drm_gem.h | ||
| 856 | </sect2> | ||
| 857 | <sect2> | ||
| 858 | <title>VMA Offset Manager</title> | ||
| 859 | !Pdrivers/gpu/drm/drm_vma_manager.c vma offset manager | ||
| 860 | !Edrivers/gpu/drm/drm_vma_manager.c | ||
| 861 | !Iinclude/drm/drm_vma_manager.h | ||
| 862 | </sect2> | ||
| 863 | <sect2 id="drm-prime-support"> | ||
| 864 | <title>PRIME Buffer Sharing</title> | ||
| 865 | <para> | ||
| 866 | PRIME is the cross device buffer sharing framework in drm, originally | ||
| 867 | created for the OPTIMUS range of multi-gpu platforms. To userspace | ||
| 868 | PRIME buffers are dma-buf based file descriptors. | ||
| 869 | </para> | ||
| 870 | <sect3> | ||
| 871 | <title>Overview and Driver Interface</title> | ||
| 872 | <para> | ||
| 873 | Similar to GEM global names, PRIME file descriptors are | ||
| 874 | also used to share buffer objects across processes. They offer | ||
| 875 | additional security: as file descriptors must be explicitly sent over | ||
| 876 | UNIX domain sockets to be shared between applications, they can't be | ||
| 877 | guessed like the globally unique GEM names. | ||
| 878 | </para> | ||
| 879 | <para> | ||
| 880 | Drivers that support the PRIME | ||
| 881 | API must set the DRIVER_PRIME bit in the struct | ||
| 882 | <structname>drm_driver</structname> | ||
| 883 | <structfield>driver_features</structfield> field, and implement the | ||
| 884 | <methodname>prime_handle_to_fd</methodname> and | ||
| 885 | <methodname>prime_fd_to_handle</methodname> operations. | ||
| 886 | </para> | ||
| 887 | <para> | ||
| 888 | <synopsis>int (*prime_handle_to_fd)(struct drm_device *dev, | ||
| 889 | struct drm_file *file_priv, uint32_t handle, | ||
| 890 | uint32_t flags, int *prime_fd); | ||
| 891 | int (*prime_fd_to_handle)(struct drm_device *dev, | ||
| 892 | struct drm_file *file_priv, int prime_fd, | ||
| 893 | uint32_t *handle);</synopsis> | ||
| 894 | Those two operations convert a handle to a PRIME file descriptor and | ||
| 895 | vice versa. Drivers must use the kernel dma-buf buffer sharing framework | ||
| 896 | to manage the PRIME file descriptors. Similar to the mode setting | ||
| 897 | API PRIME is agnostic to the underlying buffer object manager, as | ||
| 898 | long as handles are 32bit unsigned integers. | ||
| 899 | </para> | ||
| 900 | <para> | ||
| 901 | While non-GEM drivers must implement the operations themselves, GEM | ||
| 902 | drivers must use the <function>drm_gem_prime_handle_to_fd</function> | ||
| 903 | and <function>drm_gem_prime_fd_to_handle</function> helper functions. | ||
| 904 | Those helpers rely on the driver | ||
| 905 | <methodname>gem_prime_export</methodname> and | ||
| 906 | <methodname>gem_prime_import</methodname> operations to create a dma-buf | ||
| 907 | instance from a GEM object (dma-buf exporter role) and to create a GEM | ||
| 908 | object from a dma-buf instance (dma-buf importer role). | ||
| 909 | </para> | ||
| 910 | <para> | ||
| 911 | <synopsis>struct dma_buf * (*gem_prime_export)(struct drm_device *dev, | ||
| 912 | struct drm_gem_object *obj, | ||
| 913 | int flags); | ||
| 914 | struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev, | ||
| 915 | struct dma_buf *dma_buf);</synopsis> | ||
| 916 | These two operations are mandatory for GEM drivers that support | ||
| 917 | PRIME. | ||
| 918 | </para> | ||
| 919 | </sect3> | ||
| 920 | <sect3> | ||
| 921 | <title>PRIME Helper Functions</title> | ||
| 922 | !Pdrivers/gpu/drm/drm_prime.c PRIME Helpers | ||
| 923 | </sect3> | ||
| 924 | </sect2> | ||
| 925 | <sect2> | ||
| 926 | <title>PRIME Function References</title> | ||
| 927 | !Edrivers/gpu/drm/drm_prime.c | ||
| 928 | </sect2> | ||
| 929 | <sect2> | ||
| 930 | <title>DRM MM Range Allocator</title> | ||
| 931 | <sect3> | ||
| 932 | <title>Overview</title> | ||
| 933 | !Pdrivers/gpu/drm/drm_mm.c Overview | ||
| 934 | </sect3> | ||
| 935 | <sect3> | ||
| 936 | <title>LRU Scan/Eviction Support</title> | ||
| 937 | !Pdrivers/gpu/drm/drm_mm.c lru scan roaster | ||
| 938 | </sect3> | ||
| 939 | </sect2> | ||
| 940 | <sect2> | ||
| 941 | <title>DRM MM Range Allocator Function References</title> | ||
| 942 | !Edrivers/gpu/drm/drm_mm.c | ||
| 943 | !Iinclude/drm/drm_mm.h | ||
| 944 | </sect2> | ||
| 945 | <sect2> | ||
| 946 | <title>CMA Helper Functions Reference</title> | ||
| 947 | !Pdrivers/gpu/drm/drm_gem_cma_helper.c cma helpers | ||
| 948 | !Edrivers/gpu/drm/drm_gem_cma_helper.c | ||
| 949 | !Iinclude/drm/drm_gem_cma_helper.h | ||
| 950 | </sect2> | ||
| 951 | </sect1> | ||
| 952 | |||
| 953 | <!-- Internals: mode setting --> | ||
| 954 | |||
| 955 | <sect1 id="drm-mode-setting"> | ||
| 956 | <title>Mode Setting</title> | ||
| 957 | <para> | ||
| 958 | Drivers must initialize the mode setting core by calling | ||
| 959 | <function>drm_mode_config_init</function> on the DRM device. The function | ||
| 960 | initializes the <structname>drm_device</structname> | ||
| 961 | <structfield>mode_config</structfield> field and never fails. Once done, | ||
| 962 | mode configuration must be setup by initializing the following fields. | ||
| 963 | </para> | ||
| 964 | <itemizedlist> | ||
| 965 | <listitem> | ||
| 966 | <synopsis>int min_width, min_height; | ||
| 967 | int max_width, max_height;</synopsis> | ||
| 968 | <para> | ||
| 969 | Minimum and maximum width and height of the frame buffers in pixel | ||
| 970 | units. | ||
| 971 | </para> | ||
| 972 | </listitem> | ||
| 973 | <listitem> | ||
| 974 | <synopsis>struct drm_mode_config_funcs *funcs;</synopsis> | ||
| 975 | <para>Mode setting functions.</para> | ||
| 976 | </listitem> | ||
| 977 | </itemizedlist> | ||
| 978 | <sect2> | ||
| 979 | <title>Display Modes Function Reference</title> | ||
| 980 | !Iinclude/drm/drm_modes.h | ||
| 981 | !Edrivers/gpu/drm/drm_modes.c | ||
| 982 | </sect2> | ||
| 983 | <sect2> | ||
| 984 | <title>Atomic Mode Setting Function Reference</title> | ||
| 985 | !Edrivers/gpu/drm/drm_atomic.c | ||
| 986 | !Idrivers/gpu/drm/drm_atomic.c | ||
| 987 | </sect2> | ||
| 988 | <sect2> | ||
| 989 | <title>Frame Buffer Abstraction</title> | ||
| 990 | <para> | ||
| 991 | Frame buffers are abstract memory objects that provide a source of | ||
| 992 | pixels to scanout to a CRTC. Applications explicitly request the | ||
| 993 | creation of frame buffers through the DRM_IOCTL_MODE_ADDFB(2) ioctls and | ||
| 994 | receive an opaque handle that can be passed to the KMS CRTC control, | ||
| 995 | plane configuration and page flip functions. | ||
| 996 | </para> | ||
| 997 | <para> | ||
| 998 | Frame buffers rely on the underneath memory manager for low-level memory | ||
| 999 | operations. When creating a frame buffer applications pass a memory | ||
| 1000 | handle (or a list of memory handles for multi-planar formats) through | ||
| 1001 | the <parameter>drm_mode_fb_cmd2</parameter> argument. For drivers using | ||
| 1002 | GEM as their userspace buffer management interface this would be a GEM | ||
| 1003 | handle. Drivers are however free to use their own backing storage object | ||
| 1004 | handles, e.g. vmwgfx directly exposes special TTM handles to userspace | ||
| 1005 | and so expects TTM handles in the create ioctl and not GEM handles. | ||
| 1006 | </para> | ||
| 1007 | <para> | ||
| 1008 | The lifetime of a drm framebuffer is controlled with a reference count, | ||
| 1009 | drivers can grab additional references with | ||
| 1010 | <function>drm_framebuffer_reference</function>and drop them | ||
| 1011 | again with <function>drm_framebuffer_unreference</function>. For | ||
| 1012 | driver-private framebuffers for which the last reference is never | ||
| 1013 | dropped (e.g. for the fbdev framebuffer when the struct | ||
| 1014 | <structname>drm_framebuffer</structname> is embedded into the fbdev | ||
| 1015 | helper struct) drivers can manually clean up a framebuffer at module | ||
| 1016 | unload time with | ||
| 1017 | <function>drm_framebuffer_unregister_private</function>. | ||
| 1018 | </para> | ||
| 1019 | </sect2> | ||
| 1020 | <sect2> | ||
| 1021 | <title>Dumb Buffer Objects</title> | ||
| 1022 | <para> | ||
| 1023 | The KMS API doesn't standardize backing storage object creation and | ||
| 1024 | leaves it to driver-specific ioctls. Furthermore actually creating a | ||
| 1025 | buffer object even for GEM-based drivers is done through a | ||
| 1026 | driver-specific ioctl - GEM only has a common userspace interface for | ||
| 1027 | sharing and destroying objects. While not an issue for full-fledged | ||
| 1028 | graphics stacks that include device-specific userspace components (in | ||
| 1029 | libdrm for instance), this limit makes DRM-based early boot graphics | ||
| 1030 | unnecessarily complex. | ||
| 1031 | </para> | ||
| 1032 | <para> | ||
| 1033 | Dumb objects partly alleviate the problem by providing a standard | ||
| 1034 | API to create dumb buffers suitable for scanout, which can then be used | ||
| 1035 | to create KMS frame buffers. | ||
| 1036 | </para> | ||
| 1037 | <para> | ||
| 1038 | To support dumb objects drivers must implement the | ||
| 1039 | <methodname>dumb_create</methodname>, | ||
| 1040 | <methodname>dumb_destroy</methodname> and | ||
| 1041 | <methodname>dumb_map_offset</methodname> operations. | ||
| 1042 | </para> | ||
| 1043 | <itemizedlist> | ||
| 1044 | <listitem> | ||
| 1045 | <synopsis>int (*dumb_create)(struct drm_file *file_priv, struct drm_device *dev, | ||
| 1046 | struct drm_mode_create_dumb *args);</synopsis> | ||
| 1047 | <para> | ||
| 1048 | The <methodname>dumb_create</methodname> operation creates a driver | ||
| 1049 | object (GEM or TTM handle) suitable for scanout based on the | ||
| 1050 | width, height and depth from the struct | ||
| 1051 | <structname>drm_mode_create_dumb</structname> argument. It fills the | ||
| 1052 | argument's <structfield>handle</structfield>, | ||
| 1053 | <structfield>pitch</structfield> and <structfield>size</structfield> | ||
| 1054 | fields with a handle for the newly created object and its line | ||
| 1055 | pitch and size in bytes. | ||
| 1056 | </para> | ||
| 1057 | </listitem> | ||
| 1058 | <listitem> | ||
| 1059 | <synopsis>int (*dumb_destroy)(struct drm_file *file_priv, struct drm_device *dev, | ||
| 1060 | uint32_t handle);</synopsis> | ||
| 1061 | <para> | ||
| 1062 | The <methodname>dumb_destroy</methodname> operation destroys a dumb | ||
| 1063 | object created by <methodname>dumb_create</methodname>. | ||
| 1064 | </para> | ||
| 1065 | </listitem> | ||
| 1066 | <listitem> | ||
| 1067 | <synopsis>int (*dumb_map_offset)(struct drm_file *file_priv, struct drm_device *dev, | ||
| 1068 | uint32_t handle, uint64_t *offset);</synopsis> | ||
| 1069 | <para> | ||
| 1070 | The <methodname>dumb_map_offset</methodname> operation associates an | ||
| 1071 | mmap fake offset with the object given by the handle and returns | ||
| 1072 | it. Drivers must use the | ||
| 1073 | <function>drm_gem_create_mmap_offset</function> function to | ||
| 1074 | associate the fake offset as described in | ||
| 1075 | <xref linkend="drm-gem-objects-mapping"/>. | ||
| 1076 | </para> | ||
| 1077 | </listitem> | ||
| 1078 | </itemizedlist> | ||
| 1079 | <para> | ||
| 1080 | Note that dumb objects may not be used for gpu acceleration, as has been | ||
| 1081 | attempted on some ARM embedded platforms. Such drivers really must have | ||
| 1082 | a hardware-specific ioctl to allocate suitable buffer objects. | ||
| 1083 | </para> | ||
| 1084 | </sect2> | ||
| 1085 | <sect2> | ||
| 1086 | <title>Output Polling</title> | ||
| 1087 | <synopsis>void (*output_poll_changed)(struct drm_device *dev);</synopsis> | ||
| 1088 | <para> | ||
| 1089 | This operation notifies the driver that the status of one or more | ||
| 1090 | connectors has changed. Drivers that use the fb helper can just call the | ||
| 1091 | <function>drm_fb_helper_hotplug_event</function> function to handle this | ||
| 1092 | operation. | ||
| 1093 | </para> | ||
| 1094 | </sect2> | ||
| 1095 | <sect2> | ||
| 1096 | <title>Locking</title> | ||
| 1097 | <para> | ||
| 1098 | Beside some lookup structures with their own locking (which is hidden | ||
| 1099 | behind the interface functions) most of the modeset state is protected | ||
| 1100 | by the <code>dev-<mode_config.lock</code> mutex and additionally | ||
| 1101 | per-crtc locks to allow cursor updates, pageflips and similar operations | ||
| 1102 | to occur concurrently with background tasks like output detection. | ||
| 1103 | Operations which cross domains like a full modeset always grab all | ||
| 1104 | locks. Drivers there need to protect resources shared between crtcs with | ||
| 1105 | additional locking. They also need to be careful to always grab the | ||
| 1106 | relevant crtc locks if a modset functions touches crtc state, e.g. for | ||
| 1107 | load detection (which does only grab the <code>mode_config.lock</code> | ||
| 1108 | to allow concurrent screen updates on live crtcs). | ||
| 1109 | </para> | ||
| 1110 | </sect2> | ||
| 1111 | </sect1> | ||
| 1112 | |||
| 1113 | <!-- Internals: kms initialization and cleanup --> | ||
| 1114 | |||
| 1115 | <sect1 id="drm-kms-init"> | ||
| 1116 | <title>KMS Initialization and Cleanup</title> | ||
| 1117 | <para> | ||
| 1118 | A KMS device is abstracted and exposed as a set of planes, CRTCs, encoders | ||
| 1119 | and connectors. KMS drivers must thus create and initialize all those | ||
| 1120 | objects at load time after initializing mode setting. | ||
| 1121 | </para> | ||
| 1122 | <sect2> | ||
| 1123 | <title>CRTCs (struct <structname>drm_crtc</structname>)</title> | ||
| 1124 | <para> | ||
| 1125 | A CRTC is an abstraction representing a part of the chip that contains a | ||
| 1126 | pointer to a scanout buffer. Therefore, the number of CRTCs available | ||
| 1127 | determines how many independent scanout buffers can be active at any | ||
| 1128 | given time. The CRTC structure contains several fields to support this: | ||
| 1129 | a pointer to some video memory (abstracted as a frame buffer object), a | ||
| 1130 | display mode, and an (x, y) offset into the video memory to support | ||
| 1131 | panning or configurations where one piece of video memory spans multiple | ||
| 1132 | CRTCs. | ||
| 1133 | </para> | ||
| 1134 | <sect3> | ||
| 1135 | <title>CRTC Initialization</title> | ||
| 1136 | <para> | ||
| 1137 | A KMS device must create and register at least one struct | ||
| 1138 | <structname>drm_crtc</structname> instance. The instance is allocated | ||
| 1139 | and zeroed by the driver, possibly as part of a larger structure, and | ||
| 1140 | registered with a call to <function>drm_crtc_init</function> with a | ||
| 1141 | pointer to CRTC functions. | ||
| 1142 | </para> | ||
| 1143 | </sect3> | ||
| 1144 | </sect2> | ||
| 1145 | <sect2> | ||
| 1146 | <title>Planes (struct <structname>drm_plane</structname>)</title> | ||
| 1147 | <para> | ||
| 1148 | A plane represents an image source that can be blended with or overlayed | ||
| 1149 | on top of a CRTC during the scanout process. Planes are associated with | ||
| 1150 | a frame buffer to crop a portion of the image memory (source) and | ||
| 1151 | optionally scale it to a destination size. The result is then blended | ||
| 1152 | with or overlayed on top of a CRTC. | ||
| 1153 | </para> | ||
| 1154 | <para> | ||
| 1155 | The DRM core recognizes three types of planes: | ||
| 1156 | <itemizedlist> | ||
| 1157 | <listitem> | ||
| 1158 | DRM_PLANE_TYPE_PRIMARY represents a "main" plane for a CRTC. Primary | ||
| 1159 | planes are the planes operated upon by CRTC modesetting and flipping | ||
| 1160 | operations described in the page_flip hook in <structname>drm_crtc_funcs</structname>. | ||
| 1161 | </listitem> | ||
| 1162 | <listitem> | ||
| 1163 | DRM_PLANE_TYPE_CURSOR represents a "cursor" plane for a CRTC. Cursor | ||
| 1164 | planes are the planes operated upon by the DRM_IOCTL_MODE_CURSOR and | ||
| 1165 | DRM_IOCTL_MODE_CURSOR2 ioctls. | ||
| 1166 | </listitem> | ||
| 1167 | <listitem> | ||
| 1168 | DRM_PLANE_TYPE_OVERLAY represents all non-primary, non-cursor planes. | ||
| 1169 | Some drivers refer to these types of planes as "sprites" internally. | ||
| 1170 | </listitem> | ||
| 1171 | </itemizedlist> | ||
| 1172 | For compatibility with legacy userspace, only overlay planes are made | ||
| 1173 | available to userspace by default. Userspace clients may set the | ||
| 1174 | DRM_CLIENT_CAP_UNIVERSAL_PLANES client capability bit to indicate that | ||
| 1175 | they wish to receive a universal plane list containing all plane types. | ||
| 1176 | </para> | ||
| 1177 | <sect3> | ||
| 1178 | <title>Plane Initialization</title> | ||
| 1179 | <para> | ||
| 1180 | To create a plane, a KMS drivers allocates and | ||
| 1181 | zeroes an instances of struct <structname>drm_plane</structname> | ||
| 1182 | (possibly as part of a larger structure) and registers it with a call | ||
| 1183 | to <function>drm_universal_plane_init</function>. The function takes a bitmask | ||
| 1184 | of the CRTCs that can be associated with the plane, a pointer to the | ||
| 1185 | plane functions, a list of format supported formats, and the type of | ||
| 1186 | plane (primary, cursor, or overlay) being initialized. | ||
| 1187 | </para> | ||
| 1188 | <para> | ||
| 1189 | Cursor and overlay planes are optional. All drivers should provide | ||
| 1190 | one primary plane per CRTC (although this requirement may change in | ||
| 1191 | the future); drivers that do not wish to provide special handling for | ||
| 1192 | primary planes may make use of the helper functions described in | ||
| 1193 | <xref linkend="drm-kms-planehelpers"/> to create and register a | ||
| 1194 | primary plane with standard capabilities. | ||
| 1195 | </para> | ||
| 1196 | </sect3> | ||
| 1197 | </sect2> | ||
| 1198 | <sect2> | ||
| 1199 | <title>Encoders (struct <structname>drm_encoder</structname>)</title> | ||
| 1200 | <para> | ||
| 1201 | An encoder takes pixel data from a CRTC and converts it to a format | ||
| 1202 | suitable for any attached connectors. On some devices, it may be | ||
| 1203 | possible to have a CRTC send data to more than one encoder. In that | ||
| 1204 | case, both encoders would receive data from the same scanout buffer, | ||
| 1205 | resulting in a "cloned" display configuration across the connectors | ||
| 1206 | attached to each encoder. | ||
| 1207 | </para> | ||
| 1208 | <sect3> | ||
| 1209 | <title>Encoder Initialization</title> | ||
| 1210 | <para> | ||
| 1211 | As for CRTCs, a KMS driver must create, initialize and register at | ||
| 1212 | least one struct <structname>drm_encoder</structname> instance. The | ||
| 1213 | instance is allocated and zeroed by the driver, possibly as part of a | ||
| 1214 | larger structure. | ||
| 1215 | </para> | ||
| 1216 | <para> | ||
| 1217 | Drivers must initialize the struct <structname>drm_encoder</structname> | ||
| 1218 | <structfield>possible_crtcs</structfield> and | ||
| 1219 | <structfield>possible_clones</structfield> fields before registering the | ||
| 1220 | encoder. Both fields are bitmasks of respectively the CRTCs that the | ||
| 1221 | encoder can be connected to, and sibling encoders candidate for cloning. | ||
| 1222 | </para> | ||
| 1223 | <para> | ||
| 1224 | After being initialized, the encoder must be registered with a call to | ||
| 1225 | <function>drm_encoder_init</function>. The function takes a pointer to | ||
| 1226 | the encoder functions and an encoder type. Supported types are | ||
| 1227 | <itemizedlist> | ||
| 1228 | <listitem> | ||
| 1229 | DRM_MODE_ENCODER_DAC for VGA and analog on DVI-I/DVI-A | ||
| 1230 | </listitem> | ||
| 1231 | <listitem> | ||
| 1232 | DRM_MODE_ENCODER_TMDS for DVI, HDMI and (embedded) DisplayPort | ||
| 1233 | </listitem> | ||
| 1234 | <listitem> | ||
| 1235 | DRM_MODE_ENCODER_LVDS for display panels | ||
| 1236 | </listitem> | ||
| 1237 | <listitem> | ||
| 1238 | DRM_MODE_ENCODER_TVDAC for TV output (Composite, S-Video, Component, | ||
| 1239 | SCART) | ||
| 1240 | </listitem> | ||
| 1241 | <listitem> | ||
| 1242 | DRM_MODE_ENCODER_VIRTUAL for virtual machine displays | ||
| 1243 | </listitem> | ||
| 1244 | </itemizedlist> | ||
| 1245 | </para> | ||
| 1246 | <para> | ||
| 1247 | Encoders must be attached to a CRTC to be used. DRM drivers leave | ||
| 1248 | encoders unattached at initialization time. Applications (or the fbdev | ||
| 1249 | compatibility layer when implemented) are responsible for attaching the | ||
| 1250 | encoders they want to use to a CRTC. | ||
| 1251 | </para> | ||
| 1252 | </sect3> | ||
| 1253 | </sect2> | ||
| 1254 | <sect2> | ||
| 1255 | <title>Connectors (struct <structname>drm_connector</structname>)</title> | ||
| 1256 | <para> | ||
| 1257 | A connector is the final destination for pixel data on a device, and | ||
| 1258 | usually connects directly to an external display device like a monitor | ||
| 1259 | or laptop panel. A connector can only be attached to one encoder at a | ||
| 1260 | time. The connector is also the structure where information about the | ||
| 1261 | attached display is kept, so it contains fields for display data, EDID | ||
| 1262 | data, DPMS & connection status, and information about modes | ||
| 1263 | supported on the attached displays. | ||
| 1264 | </para> | ||
| 1265 | <sect3> | ||
| 1266 | <title>Connector Initialization</title> | ||
| 1267 | <para> | ||
| 1268 | Finally a KMS driver must create, initialize, register and attach at | ||
| 1269 | least one struct <structname>drm_connector</structname> instance. The | ||
| 1270 | instance is created as other KMS objects and initialized by setting the | ||
| 1271 | following fields. | ||
| 1272 | </para> | ||
| 1273 | <variablelist> | ||
| 1274 | <varlistentry> | ||
| 1275 | <term><structfield>interlace_allowed</structfield></term> | ||
| 1276 | <listitem><para> | ||
| 1277 | Whether the connector can handle interlaced modes. | ||
| 1278 | </para></listitem> | ||
| 1279 | </varlistentry> | ||
| 1280 | <varlistentry> | ||
| 1281 | <term><structfield>doublescan_allowed</structfield></term> | ||
| 1282 | <listitem><para> | ||
| 1283 | Whether the connector can handle doublescan. | ||
| 1284 | </para></listitem> | ||
| 1285 | </varlistentry> | ||
| 1286 | <varlistentry> | ||
| 1287 | <term><structfield>display_info | ||
| 1288 | </structfield></term> | ||
| 1289 | <listitem><para> | ||
| 1290 | Display information is filled from EDID information when a display | ||
| 1291 | is detected. For non hot-pluggable displays such as flat panels in | ||
| 1292 | embedded systems, the driver should initialize the | ||
| 1293 | <structfield>display_info</structfield>.<structfield>width_mm</structfield> | ||
| 1294 | and | ||
| 1295 | <structfield>display_info</structfield>.<structfield>height_mm</structfield> | ||
| 1296 | fields with the physical size of the display. | ||
| 1297 | </para></listitem> | ||
| 1298 | </varlistentry> | ||
| 1299 | <varlistentry> | ||
| 1300 | <term id="drm-kms-connector-polled"><structfield>polled</structfield></term> | ||
| 1301 | <listitem><para> | ||
| 1302 | Connector polling mode, a combination of | ||
| 1303 | <variablelist> | ||
| 1304 | <varlistentry> | ||
| 1305 | <term>DRM_CONNECTOR_POLL_HPD</term> | ||
| 1306 | <listitem><para> | ||
| 1307 | The connector generates hotplug events and doesn't need to be | ||
| 1308 | periodically polled. The CONNECT and DISCONNECT flags must not | ||
| 1309 | be set together with the HPD flag. | ||
| 1310 | </para></listitem> | ||
| 1311 | </varlistentry> | ||
| 1312 | <varlistentry> | ||
| 1313 | <term>DRM_CONNECTOR_POLL_CONNECT</term> | ||
| 1314 | <listitem><para> | ||
| 1315 | Periodically poll the connector for connection. | ||
| 1316 | </para></listitem> | ||
| 1317 | </varlistentry> | ||
| 1318 | <varlistentry> | ||
| 1319 | <term>DRM_CONNECTOR_POLL_DISCONNECT</term> | ||
| 1320 | <listitem><para> | ||
| 1321 | Periodically poll the connector for disconnection. | ||
| 1322 | </para></listitem> | ||
| 1323 | </varlistentry> | ||
| 1324 | </variablelist> | ||
| 1325 | Set to 0 for connectors that don't support connection status | ||
| 1326 | discovery. | ||
| 1327 | </para></listitem> | ||
| 1328 | </varlistentry> | ||
| 1329 | </variablelist> | ||
| 1330 | <para> | ||
| 1331 | The connector is then registered with a call to | ||
| 1332 | <function>drm_connector_init</function> with a pointer to the connector | ||
| 1333 | functions and a connector type, and exposed through sysfs with a call to | ||
| 1334 | <function>drm_connector_register</function>. | ||
| 1335 | </para> | ||
| 1336 | <para> | ||
| 1337 | Supported connector types are | ||
| 1338 | <itemizedlist> | ||
| 1339 | <listitem>DRM_MODE_CONNECTOR_VGA</listitem> | ||
| 1340 | <listitem>DRM_MODE_CONNECTOR_DVII</listitem> | ||
| 1341 | <listitem>DRM_MODE_CONNECTOR_DVID</listitem> | ||
| 1342 | <listitem>DRM_MODE_CONNECTOR_DVIA</listitem> | ||
| 1343 | <listitem>DRM_MODE_CONNECTOR_Composite</listitem> | ||
| 1344 | <listitem>DRM_MODE_CONNECTOR_SVIDEO</listitem> | ||
| 1345 | <listitem>DRM_MODE_CONNECTOR_LVDS</listitem> | ||
| 1346 | <listitem>DRM_MODE_CONNECTOR_Component</listitem> | ||
| 1347 | <listitem>DRM_MODE_CONNECTOR_9PinDIN</listitem> | ||
| 1348 | <listitem>DRM_MODE_CONNECTOR_DisplayPort</listitem> | ||
| 1349 | <listitem>DRM_MODE_CONNECTOR_HDMIA</listitem> | ||
| 1350 | <listitem>DRM_MODE_CONNECTOR_HDMIB</listitem> | ||
| 1351 | <listitem>DRM_MODE_CONNECTOR_TV</listitem> | ||
| 1352 | <listitem>DRM_MODE_CONNECTOR_eDP</listitem> | ||
| 1353 | <listitem>DRM_MODE_CONNECTOR_VIRTUAL</listitem> | ||
| 1354 | </itemizedlist> | ||
| 1355 | </para> | ||
| 1356 | <para> | ||
| 1357 | Connectors must be attached to an encoder to be used. For devices that | ||
| 1358 | map connectors to encoders 1:1, the connector should be attached at | ||
| 1359 | initialization time with a call to | ||
| 1360 | <function>drm_mode_connector_attach_encoder</function>. The driver must | ||
| 1361 | also set the <structname>drm_connector</structname> | ||
| 1362 | <structfield>encoder</structfield> field to point to the attached | ||
| 1363 | encoder. | ||
| 1364 | </para> | ||
| 1365 | <para> | ||
| 1366 | Finally, drivers must initialize the connectors state change detection | ||
| 1367 | with a call to <function>drm_kms_helper_poll_init</function>. If at | ||
| 1368 | least one connector is pollable but can't generate hotplug interrupts | ||
| 1369 | (indicated by the DRM_CONNECTOR_POLL_CONNECT and | ||
| 1370 | DRM_CONNECTOR_POLL_DISCONNECT connector flags), a delayed work will | ||
| 1371 | automatically be queued to periodically poll for changes. Connectors | ||
| 1372 | that can generate hotplug interrupts must be marked with the | ||
| 1373 | DRM_CONNECTOR_POLL_HPD flag instead, and their interrupt handler must | ||
| 1374 | call <function>drm_helper_hpd_irq_event</function>. The function will | ||
| 1375 | queue a delayed work to check the state of all connectors, but no | ||
| 1376 | periodic polling will be done. | ||
| 1377 | </para> | ||
| 1378 | </sect3> | ||
| 1379 | <sect3> | ||
| 1380 | <title>Connector Operations</title> | ||
| 1381 | <note><para> | ||
| 1382 | Unless otherwise state, all operations are mandatory. | ||
| 1383 | </para></note> | ||
| 1384 | <sect4> | ||
| 1385 | <title>DPMS</title> | ||
| 1386 | <synopsis>void (*dpms)(struct drm_connector *connector, int mode);</synopsis> | ||
| 1387 | <para> | ||
| 1388 | The DPMS operation sets the power state of a connector. The mode | ||
| 1389 | argument is one of | ||
| 1390 | <itemizedlist> | ||
| 1391 | <listitem><para>DRM_MODE_DPMS_ON</para></listitem> | ||
| 1392 | <listitem><para>DRM_MODE_DPMS_STANDBY</para></listitem> | ||
| 1393 | <listitem><para>DRM_MODE_DPMS_SUSPEND</para></listitem> | ||
| 1394 | <listitem><para>DRM_MODE_DPMS_OFF</para></listitem> | ||
| 1395 | </itemizedlist> | ||
| 1396 | </para> | ||
| 1397 | <para> | ||
| 1398 | In all but DPMS_ON mode the encoder to which the connector is attached | ||
| 1399 | should put the display in low-power mode by driving its signals | ||
| 1400 | appropriately. If more than one connector is attached to the encoder | ||
| 1401 | care should be taken not to change the power state of other displays as | ||
| 1402 | a side effect. Low-power mode should be propagated to the encoders and | ||
| 1403 | CRTCs when all related connectors are put in low-power mode. | ||
| 1404 | </para> | ||
| 1405 | </sect4> | ||
| 1406 | <sect4> | ||
| 1407 | <title>Modes</title> | ||
| 1408 | <synopsis>int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, | ||
| 1409 | uint32_t max_height);</synopsis> | ||
| 1410 | <para> | ||
| 1411 | Fill the mode list with all supported modes for the connector. If the | ||
| 1412 | <parameter>max_width</parameter> and <parameter>max_height</parameter> | ||
| 1413 | arguments are non-zero, the implementation must ignore all modes wider | ||
| 1414 | than <parameter>max_width</parameter> or higher than | ||
| 1415 | <parameter>max_height</parameter>. | ||
| 1416 | </para> | ||
| 1417 | <para> | ||
| 1418 | The connector must also fill in this operation its | ||
| 1419 | <structfield>display_info</structfield> | ||
| 1420 | <structfield>width_mm</structfield> and | ||
| 1421 | <structfield>height_mm</structfield> fields with the connected display | ||
| 1422 | physical size in millimeters. The fields should be set to 0 if the value | ||
| 1423 | isn't known or is not applicable (for instance for projector devices). | ||
| 1424 | </para> | ||
| 1425 | </sect4> | ||
| 1426 | <sect4> | ||
| 1427 | <title>Connection Status</title> | ||
| 1428 | <para> | ||
| 1429 | The connection status is updated through polling or hotplug events when | ||
| 1430 | supported (see <xref linkend="drm-kms-connector-polled"/>). The status | ||
| 1431 | value is reported to userspace through ioctls and must not be used | ||
| 1432 | inside the driver, as it only gets initialized by a call to | ||
| 1433 | <function>drm_mode_getconnector</function> from userspace. | ||
| 1434 | </para> | ||
| 1435 | <synopsis>enum drm_connector_status (*detect)(struct drm_connector *connector, | ||
| 1436 | bool force);</synopsis> | ||
| 1437 | <para> | ||
| 1438 | Check to see if anything is attached to the connector. The | ||
| 1439 | <parameter>force</parameter> parameter is set to false whilst polling or | ||
| 1440 | to true when checking the connector due to user request. | ||
| 1441 | <parameter>force</parameter> can be used by the driver to avoid | ||
| 1442 | expensive, destructive operations during automated probing. | ||
| 1443 | </para> | ||
| 1444 | <para> | ||
| 1445 | Return connector_status_connected if something is connected to the | ||
| 1446 | connector, connector_status_disconnected if nothing is connected and | ||
| 1447 | connector_status_unknown if the connection state isn't known. | ||
| 1448 | </para> | ||
| 1449 | <para> | ||
| 1450 | Drivers should only return connector_status_connected if the connection | ||
| 1451 | status has really been probed as connected. Connectors that can't detect | ||
| 1452 | the connection status, or failed connection status probes, should return | ||
| 1453 | connector_status_unknown. | ||
| 1454 | </para> | ||
| 1455 | </sect4> | ||
| 1456 | </sect3> | ||
| 1457 | </sect2> | ||
| 1458 | <sect2> | ||
| 1459 | <title>Cleanup</title> | ||
| 1460 | <para> | ||
| 1461 | The DRM core manages its objects' lifetime. When an object is not needed | ||
| 1462 | anymore the core calls its destroy function, which must clean up and | ||
| 1463 | free every resource allocated for the object. Every | ||
| 1464 | <function>drm_*_init</function> call must be matched with a | ||
| 1465 | corresponding <function>drm_*_cleanup</function> call to cleanup CRTCs | ||
| 1466 | (<function>drm_crtc_cleanup</function>), planes | ||
| 1467 | (<function>drm_plane_cleanup</function>), encoders | ||
| 1468 | (<function>drm_encoder_cleanup</function>) and connectors | ||
| 1469 | (<function>drm_connector_cleanup</function>). Furthermore, connectors | ||
| 1470 | that have been added to sysfs must be removed by a call to | ||
| 1471 | <function>drm_connector_unregister</function> before calling | ||
| 1472 | <function>drm_connector_cleanup</function>. | ||
| 1473 | </para> | ||
| 1474 | <para> | ||
| 1475 | Connectors state change detection must be cleanup up with a call to | ||
| 1476 | <function>drm_kms_helper_poll_fini</function>. | ||
| 1477 | </para> | ||
| 1478 | </sect2> | ||
| 1479 | <sect2> | ||
| 1480 | <title>Output discovery and initialization example</title> | ||
| 1481 | <programlisting><![CDATA[ | ||
| 1482 | void intel_crt_init(struct drm_device *dev) | ||
| 1483 | { | ||
| 1484 | struct drm_connector *connector; | ||
| 1485 | struct intel_output *intel_output; | ||
| 1486 | |||
| 1487 | intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL); | ||
| 1488 | if (!intel_output) | ||
| 1489 | return; | ||
| 1490 | |||
| 1491 | connector = &intel_output->base; | ||
| 1492 | drm_connector_init(dev, &intel_output->base, | ||
| 1493 | &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA); | ||
| 1494 | |||
| 1495 | drm_encoder_init(dev, &intel_output->enc, &intel_crt_enc_funcs, | ||
| 1496 | DRM_MODE_ENCODER_DAC); | ||
| 1497 | |||
| 1498 | drm_mode_connector_attach_encoder(&intel_output->base, | ||
| 1499 | &intel_output->enc); | ||
| 1500 | |||
| 1501 | /* Set up the DDC bus. */ | ||
| 1502 | intel_output->ddc_bus = intel_i2c_create(dev, GPIOA, "CRTDDC_A"); | ||
| 1503 | if (!intel_output->ddc_bus) { | ||
| 1504 | dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration " | ||
| 1505 | "failed.\n"); | ||
| 1506 | return; | ||
| 1507 | } | ||
| 1508 | |||
| 1509 | intel_output->type = INTEL_OUTPUT_ANALOG; | ||
| 1510 | connector->interlace_allowed = 0; | ||
| 1511 | connector->doublescan_allowed = 0; | ||
| 1512 | |||
| 1513 | drm_encoder_helper_add(&intel_output->enc, &intel_crt_helper_funcs); | ||
| 1514 | drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs); | ||
| 1515 | |||
| 1516 | drm_connector_register(connector); | ||
| 1517 | }]]></programlisting> | ||
| 1518 | <para> | ||
| 1519 | In the example above (taken from the i915 driver), a CRTC, connector and | ||
| 1520 | encoder combination is created. A device-specific i2c bus is also | ||
| 1521 | created for fetching EDID data and performing monitor detection. Once | ||
| 1522 | the process is complete, the new connector is registered with sysfs to | ||
| 1523 | make its properties available to applications. | ||
| 1524 | </para> | ||
| 1525 | </sect2> | ||
| 1526 | <sect2> | ||
| 1527 | <title>KMS API Functions</title> | ||
| 1528 | !Edrivers/gpu/drm/drm_crtc.c | ||
| 1529 | </sect2> | ||
| 1530 | <sect2> | ||
| 1531 | <title>KMS Data Structures</title> | ||
| 1532 | !Iinclude/drm/drm_crtc.h | ||
| 1533 | </sect2> | ||
| 1534 | <sect2> | ||
| 1535 | <title>KMS Locking</title> | ||
| 1536 | !Pdrivers/gpu/drm/drm_modeset_lock.c kms locking | ||
| 1537 | !Iinclude/drm/drm_modeset_lock.h | ||
| 1538 | !Edrivers/gpu/drm/drm_modeset_lock.c | ||
| 1539 | </sect2> | ||
| 1540 | </sect1> | ||
| 1541 | |||
| 1542 | <!-- Internals: kms helper functions --> | ||
| 1543 | |||
| 1544 | <sect1> | ||
| 1545 | <title>Mode Setting Helper Functions</title> | ||
| 1546 | <para> | ||
| 1547 | The plane, CRTC, encoder and connector functions provided by the drivers | ||
| 1548 | implement the DRM API. They're called by the DRM core and ioctl handlers | ||
| 1549 | to handle device state changes and configuration request. As implementing | ||
| 1550 | those functions often requires logic not specific to drivers, mid-layer | ||
| 1551 | helper functions are available to avoid duplicating boilerplate code. | ||
| 1552 | </para> | ||
| 1553 | <para> | ||
| 1554 | The DRM core contains one mid-layer implementation. The mid-layer provides | ||
| 1555 | implementations of several plane, CRTC, encoder and connector functions | ||
| 1556 | (called from the top of the mid-layer) that pre-process requests and call | ||
| 1557 | lower-level functions provided by the driver (at the bottom of the | ||
| 1558 | mid-layer). For instance, the | ||
| 1559 | <function>drm_crtc_helper_set_config</function> function can be used to | ||
| 1560 | fill the struct <structname>drm_crtc_funcs</structname> | ||
| 1561 | <structfield>set_config</structfield> field. When called, it will split | ||
| 1562 | the <methodname>set_config</methodname> operation in smaller, simpler | ||
| 1563 | operations and call the driver to handle them. | ||
| 1564 | </para> | ||
| 1565 | <para> | ||
| 1566 | To use the mid-layer, drivers call <function>drm_crtc_helper_add</function>, | ||
| 1567 | <function>drm_encoder_helper_add</function> and | ||
| 1568 | <function>drm_connector_helper_add</function> functions to install their | ||
| 1569 | mid-layer bottom operations handlers, and fill the | ||
| 1570 | <structname>drm_crtc_funcs</structname>, | ||
| 1571 | <structname>drm_encoder_funcs</structname> and | ||
| 1572 | <structname>drm_connector_funcs</structname> structures with pointers to | ||
| 1573 | the mid-layer top API functions. Installing the mid-layer bottom operation | ||
| 1574 | handlers is best done right after registering the corresponding KMS object. | ||
| 1575 | </para> | ||
| 1576 | <para> | ||
| 1577 | The mid-layer is not split between CRTC, encoder and connector operations. | ||
| 1578 | To use it, a driver must provide bottom functions for all of the three KMS | ||
| 1579 | entities. | ||
| 1580 | </para> | ||
| 1581 | <sect2> | ||
| 1582 | <title>Atomic Modeset Helper Functions Reference</title> | ||
| 1583 | <sect3> | ||
| 1584 | <title>Overview</title> | ||
| 1585 | !Pdrivers/gpu/drm/drm_atomic_helper.c overview | ||
| 1586 | </sect3> | ||
| 1587 | <sect3> | ||
| 1588 | <title>Implementing Asynchronous Atomic Commit</title> | ||
| 1589 | !Pdrivers/gpu/drm/drm_atomic_helper.c implementing async commit | ||
| 1590 | </sect3> | ||
| 1591 | <sect3> | ||
| 1592 | <title>Atomic State Reset and Initialization</title> | ||
| 1593 | !Pdrivers/gpu/drm/drm_atomic_helper.c atomic state reset and initialization | ||
| 1594 | </sect3> | ||
| 1595 | !Iinclude/drm/drm_atomic_helper.h | ||
| 1596 | !Edrivers/gpu/drm/drm_atomic_helper.c | ||
| 1597 | </sect2> | ||
| 1598 | <sect2> | ||
| 1599 | <title>Modeset Helper Reference for Common Vtables</title> | ||
| 1600 | !Iinclude/drm/drm_modeset_helper_vtables.h | ||
| 1601 | !Pinclude/drm/drm_modeset_helper_vtables.h overview | ||
| 1602 | </sect2> | ||
| 1603 | <sect2> | ||
| 1604 | <title>Legacy CRTC/Modeset Helper Functions Reference</title> | ||
| 1605 | !Edrivers/gpu/drm/drm_crtc_helper.c | ||
| 1606 | !Pdrivers/gpu/drm/drm_crtc_helper.c overview | ||
| 1607 | </sect2> | ||
| 1608 | <sect2> | ||
| 1609 | <title>Output Probing Helper Functions Reference</title> | ||
| 1610 | !Pdrivers/gpu/drm/drm_probe_helper.c output probing helper overview | ||
| 1611 | !Edrivers/gpu/drm/drm_probe_helper.c | ||
| 1612 | </sect2> | ||
| 1613 | <sect2> | ||
| 1614 | <title>fbdev Helper Functions Reference</title> | ||
| 1615 | !Pdrivers/gpu/drm/drm_fb_helper.c fbdev helpers | ||
| 1616 | !Edrivers/gpu/drm/drm_fb_helper.c | ||
| 1617 | !Iinclude/drm/drm_fb_helper.h | ||
| 1618 | </sect2> | ||
| 1619 | <sect2> | ||
| 1620 | <title>Framebuffer CMA Helper Functions Reference</title> | ||
| 1621 | !Pdrivers/gpu/drm/drm_fb_cma_helper.c framebuffer cma helper functions | ||
| 1622 | !Edrivers/gpu/drm/drm_fb_cma_helper.c | ||
| 1623 | </sect2> | ||
| 1624 | <sect2> | ||
| 1625 | <title>Display Port Helper Functions Reference</title> | ||
| 1626 | !Pdrivers/gpu/drm/drm_dp_helper.c dp helpers | ||
| 1627 | !Iinclude/drm/drm_dp_helper.h | ||
| 1628 | !Edrivers/gpu/drm/drm_dp_helper.c | ||
| 1629 | </sect2> | ||
| 1630 | <sect2> | ||
| 1631 | <title>Display Port Dual Mode Adaptor Helper Functions Reference</title> | ||
| 1632 | !Pdrivers/gpu/drm/drm_dp_dual_mode_helper.c dp dual mode helpers | ||
| 1633 | !Iinclude/drm/drm_dp_dual_mode_helper.h | ||
| 1634 | !Edrivers/gpu/drm/drm_dp_dual_mode_helper.c | ||
| 1635 | </sect2> | ||
| 1636 | <sect2> | ||
| 1637 | <title>Display Port MST Helper Functions Reference</title> | ||
| 1638 | !Pdrivers/gpu/drm/drm_dp_mst_topology.c dp mst helper | ||
| 1639 | !Iinclude/drm/drm_dp_mst_helper.h | ||
| 1640 | !Edrivers/gpu/drm/drm_dp_mst_topology.c | ||
| 1641 | </sect2> | ||
| 1642 | <sect2> | ||
| 1643 | <title>MIPI DSI Helper Functions Reference</title> | ||
| 1644 | !Pdrivers/gpu/drm/drm_mipi_dsi.c dsi helpers | ||
| 1645 | !Iinclude/drm/drm_mipi_dsi.h | ||
| 1646 | !Edrivers/gpu/drm/drm_mipi_dsi.c | ||
| 1647 | </sect2> | ||
| 1648 | <sect2> | ||
| 1649 | <title>EDID Helper Functions Reference</title> | ||
| 1650 | !Edrivers/gpu/drm/drm_edid.c | ||
| 1651 | </sect2> | ||
| 1652 | <sect2> | ||
| 1653 | <title>Rectangle Utilities Reference</title> | ||
| 1654 | !Pinclude/drm/drm_rect.h rect utils | ||
| 1655 | !Iinclude/drm/drm_rect.h | ||
| 1656 | !Edrivers/gpu/drm/drm_rect.c | ||
| 1657 | </sect2> | ||
| 1658 | <sect2> | ||
| 1659 | <title>Flip-work Helper Reference</title> | ||
| 1660 | !Pinclude/drm/drm_flip_work.h flip utils | ||
| 1661 | !Iinclude/drm/drm_flip_work.h | ||
| 1662 | !Edrivers/gpu/drm/drm_flip_work.c | ||
| 1663 | </sect2> | ||
| 1664 | <sect2> | ||
| 1665 | <title>HDMI Infoframes Helper Reference</title> | ||
| 1666 | <para> | ||
| 1667 | Strictly speaking this is not a DRM helper library but generally useable | ||
| 1668 | by any driver interfacing with HDMI outputs like v4l or alsa drivers. | ||
| 1669 | But it nicely fits into the overall topic of mode setting helper | ||
| 1670 | libraries and hence is also included here. | ||
| 1671 | </para> | ||
| 1672 | !Iinclude/linux/hdmi.h | ||
| 1673 | !Edrivers/video/hdmi.c | ||
| 1674 | </sect2> | ||
| 1675 | <sect2> | ||
| 1676 | <title id="drm-kms-planehelpers">Plane Helper Reference</title> | ||
| 1677 | !Edrivers/gpu/drm/drm_plane_helper.c | ||
| 1678 | !Pdrivers/gpu/drm/drm_plane_helper.c overview | ||
| 1679 | </sect2> | ||
| 1680 | <sect2> | ||
| 1681 | <title>Tile group</title> | ||
| 1682 | !Pdrivers/gpu/drm/drm_crtc.c Tile group | ||
| 1683 | </sect2> | ||
| 1684 | <sect2> | ||
| 1685 | <title>Bridges</title> | ||
| 1686 | <sect3> | ||
| 1687 | <title>Overview</title> | ||
| 1688 | !Pdrivers/gpu/drm/drm_bridge.c overview | ||
| 1689 | </sect3> | ||
| 1690 | <sect3> | ||
| 1691 | <title>Default bridge callback sequence</title> | ||
| 1692 | !Pdrivers/gpu/drm/drm_bridge.c bridge callbacks | ||
| 1693 | </sect3> | ||
| 1694 | !Edrivers/gpu/drm/drm_bridge.c | ||
| 1695 | </sect2> | ||
| 1696 | <sect2> | ||
| 1697 | <title>Panel Helper Reference</title> | ||
| 1698 | !Iinclude/drm/drm_panel.h | ||
| 1699 | !Edrivers/gpu/drm/drm_panel.c | ||
| 1700 | !Pdrivers/gpu/drm/drm_panel.c drm panel | ||
| 1701 | </sect2> | ||
| 1702 | </sect1> | ||
| 1703 | |||
| 1704 | <!-- Internals: kms properties --> | ||
| 1705 | |||
| 1706 | <sect1 id="drm-kms-properties"> | ||
| 1707 | <title>KMS Properties</title> | ||
| 1708 | <para> | ||
| 1709 | Drivers may need to expose additional parameters to applications than | ||
| 1710 | those described in the previous sections. KMS supports attaching | ||
| 1711 | properties to CRTCs, connectors and planes and offers a userspace API to | ||
| 1712 | list, get and set the property values. | ||
| 1713 | </para> | ||
| 1714 | <para> | ||
| 1715 | Properties are identified by a name that uniquely defines the property | ||
| 1716 | purpose, and store an associated value. For all property types except blob | ||
| 1717 | properties the value is a 64-bit unsigned integer. | ||
| 1718 | </para> | ||
| 1719 | <para> | ||
| 1720 | KMS differentiates between properties and property instances. Drivers | ||
| 1721 | first create properties and then create and associate individual instances | ||
| 1722 | of those properties to objects. A property can be instantiated multiple | ||
| 1723 | times and associated with different objects. Values are stored in property | ||
| 1724 | instances, and all other property information are stored in the property | ||
| 1725 | and shared between all instances of the property. | ||
| 1726 | </para> | ||
| 1727 | <para> | ||
| 1728 | Every property is created with a type that influences how the KMS core | ||
| 1729 | handles the property. Supported property types are | ||
| 1730 | <variablelist> | ||
| 1731 | <varlistentry> | ||
| 1732 | <term>DRM_MODE_PROP_RANGE</term> | ||
| 1733 | <listitem><para>Range properties report their minimum and maximum | ||
| 1734 | admissible values. The KMS core verifies that values set by | ||
| 1735 | application fit in that range.</para></listitem> | ||
| 1736 | </varlistentry> | ||
| 1737 | <varlistentry> | ||
| 1738 | <term>DRM_MODE_PROP_ENUM</term> | ||
| 1739 | <listitem><para>Enumerated properties take a numerical value that | ||
| 1740 | ranges from 0 to the number of enumerated values defined by the | ||
| 1741 | property minus one, and associate a free-formed string name to each | ||
| 1742 | value. Applications can retrieve the list of defined value-name pairs | ||
| 1743 | and use the numerical value to get and set property instance values. | ||
| 1744 | </para></listitem> | ||
| 1745 | </varlistentry> | ||
| 1746 | <varlistentry> | ||
| 1747 | <term>DRM_MODE_PROP_BITMASK</term> | ||
| 1748 | <listitem><para>Bitmask properties are enumeration properties that | ||
| 1749 | additionally restrict all enumerated values to the 0..63 range. | ||
| 1750 | Bitmask property instance values combine one or more of the | ||
| 1751 | enumerated bits defined by the property.</para></listitem> | ||
| 1752 | </varlistentry> | ||
| 1753 | <varlistentry> | ||
| 1754 | <term>DRM_MODE_PROP_BLOB</term> | ||
| 1755 | <listitem><para>Blob properties store a binary blob without any format | ||
| 1756 | restriction. The binary blobs are created as KMS standalone objects, | ||
| 1757 | and blob property instance values store the ID of their associated | ||
| 1758 | blob object.</para> | ||
| 1759 | <para>Blob properties are only used for the connector EDID property | ||
| 1760 | and cannot be created by drivers.</para></listitem> | ||
| 1761 | </varlistentry> | ||
| 1762 | </variablelist> | ||
| 1763 | </para> | ||
| 1764 | <para> | ||
| 1765 | To create a property drivers call one of the following functions depending | ||
| 1766 | on the property type. All property creation functions take property flags | ||
| 1767 | and name, as well as type-specific arguments. | ||
| 1768 | <itemizedlist> | ||
| 1769 | <listitem> | ||
| 1770 | <synopsis>struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, | ||
| 1771 | const char *name, | ||
| 1772 | uint64_t min, uint64_t max);</synopsis> | ||
| 1773 | <para>Create a range property with the given minimum and maximum | ||
| 1774 | values.</para> | ||
| 1775 | </listitem> | ||
| 1776 | <listitem> | ||
| 1777 | <synopsis>struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, | ||
| 1778 | const char *name, | ||
| 1779 | const struct drm_prop_enum_list *props, | ||
| 1780 | int num_values);</synopsis> | ||
| 1781 | <para>Create an enumerated property. The <parameter>props</parameter> | ||
| 1782 | argument points to an array of <parameter>num_values</parameter> | ||
| 1783 | value-name pairs.</para> | ||
| 1784 | </listitem> | ||
| 1785 | <listitem> | ||
| 1786 | <synopsis>struct drm_property *drm_property_create_bitmask(struct drm_device *dev, | ||
| 1787 | int flags, const char *name, | ||
| 1788 | const struct drm_prop_enum_list *props, | ||
| 1789 | int num_values);</synopsis> | ||
| 1790 | <para>Create a bitmask property. The <parameter>props</parameter> | ||
| 1791 | argument points to an array of <parameter>num_values</parameter> | ||
| 1792 | value-name pairs.</para> | ||
| 1793 | </listitem> | ||
| 1794 | </itemizedlist> | ||
| 1795 | </para> | ||
| 1796 | <para> | ||
| 1797 | Properties can additionally be created as immutable, in which case they | ||
| 1798 | will be read-only for applications but can be modified by the driver. To | ||
| 1799 | create an immutable property drivers must set the DRM_MODE_PROP_IMMUTABLE | ||
| 1800 | flag at property creation time. | ||
| 1801 | </para> | ||
| 1802 | <para> | ||
| 1803 | When no array of value-name pairs is readily available at property | ||
| 1804 | creation time for enumerated or range properties, drivers can create | ||
| 1805 | the property using the <function>drm_property_create</function> function | ||
| 1806 | and manually add enumeration value-name pairs by calling the | ||
| 1807 | <function>drm_property_add_enum</function> function. Care must be taken to | ||
| 1808 | properly specify the property type through the <parameter>flags</parameter> | ||
| 1809 | argument. | ||
| 1810 | </para> | ||
| 1811 | <para> | ||
| 1812 | After creating properties drivers can attach property instances to CRTC, | ||
| 1813 | connector and plane objects by calling the | ||
| 1814 | <function>drm_object_attach_property</function>. The function takes a | ||
| 1815 | pointer to the target object, a pointer to the previously created property | ||
| 1816 | and an initial instance value. | ||
| 1817 | </para> | ||
| 1818 | <sect2> | ||
| 1819 | <title>Existing KMS Properties</title> | ||
| 1820 | <para> | ||
| 1821 | The following table gives description of drm properties exposed by various | ||
| 1822 | modules/drivers. | ||
| 1823 | </para> | ||
| 1824 | <table border="1" cellpadding="0" cellspacing="0"> | ||
| 1825 | <tbody> | ||
| 1826 | <tr style="font-weight: bold;"> | ||
| 1827 | <td valign="top" >Owner Module/Drivers</td> | ||
| 1828 | <td valign="top" >Group</td> | ||
| 1829 | <td valign="top" >Property Name</td> | ||
| 1830 | <td valign="top" >Type</td> | ||
| 1831 | <td valign="top" >Property Values</td> | ||
| 1832 | <td valign="top" >Object attached</td> | ||
| 1833 | <td valign="top" >Description/Restrictions</td> | ||
| 1834 | </tr> | ||
| 1835 | <tr> | ||
| 1836 | <td rowspan="42" valign="top" >DRM</td> | ||
| 1837 | <td rowspan="2" valign="top" >Generic</td> | ||
| 1838 | <td valign="top" >“rotation”</td> | ||
| 1839 | <td valign="top" >BITMASK</td> | ||
| 1840 | <td valign="top" >{ 0, "rotate-0" }, | ||
| 1841 | { 1, "rotate-90" }, | ||
| 1842 | { 2, "rotate-180" }, | ||
| 1843 | { 3, "rotate-270" }, | ||
| 1844 | { 4, "reflect-x" }, | ||
| 1845 | { 5, "reflect-y" }</td> | ||
| 1846 | <td valign="top" >CRTC, Plane</td> | ||
| 1847 | <td valign="top" >rotate-(degrees) rotates the image by the specified amount in degrees | ||
| 1848 | in counter clockwise direction. reflect-x and reflect-y reflects the | ||
| 1849 | image along the specified axis prior to rotation</td> | ||
| 1850 | </tr> | ||
| 1851 | <tr> | ||
| 1852 | <td valign="top" >“scaling mode”</td> | ||
| 1853 | <td valign="top" >ENUM</td> | ||
| 1854 | <td valign="top" >{ "None", "Full", "Center", "Full aspect" }</td> | ||
| 1855 | <td valign="top" >Connector</td> | ||
| 1856 | <td valign="top" >Supported by: amdgpu, gma500, i915, nouveau and radeon.</td> | ||
| 1857 | </tr> | ||
| 1858 | <tr> | ||
| 1859 | <td rowspan="5" valign="top" >Connector</td> | ||
| 1860 | <td valign="top" >“EDID”</td> | ||
| 1861 | <td valign="top" >BLOB | IMMUTABLE</td> | ||
| 1862 | <td valign="top" >0</td> | ||
| 1863 | <td valign="top" >Connector</td> | ||
| 1864 | <td valign="top" >Contains id of edid blob ptr object.</td> | ||
| 1865 | </tr> | ||
| 1866 | <tr> | ||
| 1867 | <td valign="top" >“DPMS”</td> | ||
| 1868 | <td valign="top" >ENUM</td> | ||
| 1869 | <td valign="top" >{ “On”, “Standby”, “Suspend”, “Off” }</td> | ||
| 1870 | <td valign="top" >Connector</td> | ||
| 1871 | <td valign="top" >Contains DPMS operation mode value.</td> | ||
| 1872 | </tr> | ||
| 1873 | <tr> | ||
| 1874 | <td valign="top" >“PATH”</td> | ||
| 1875 | <td valign="top" >BLOB | IMMUTABLE</td> | ||
| 1876 | <td valign="top" >0</td> | ||
| 1877 | <td valign="top" >Connector</td> | ||
| 1878 | <td valign="top" >Contains topology path to a connector.</td> | ||
| 1879 | </tr> | ||
| 1880 | <tr> | ||
| 1881 | <td valign="top" >“TILE”</td> | ||
| 1882 | <td valign="top" >BLOB | IMMUTABLE</td> | ||
| 1883 | <td valign="top" >0</td> | ||
| 1884 | <td valign="top" >Connector</td> | ||
| 1885 | <td valign="top" >Contains tiling information for a connector.</td> | ||
| 1886 | </tr> | ||
| 1887 | <tr> | ||
| 1888 | <td valign="top" >“CRTC_ID”</td> | ||
| 1889 | <td valign="top" >OBJECT</td> | ||
| 1890 | <td valign="top" >DRM_MODE_OBJECT_CRTC</td> | ||
| 1891 | <td valign="top" >Connector</td> | ||
| 1892 | <td valign="top" >CRTC that connector is attached to (atomic)</td> | ||
| 1893 | </tr> | ||
| 1894 | <tr> | ||
| 1895 | <td rowspan="11" valign="top" >Plane</td> | ||
| 1896 | <td valign="top" >“type”</td> | ||
| 1897 | <td valign="top" >ENUM | IMMUTABLE</td> | ||
| 1898 | <td valign="top" >{ "Overlay", "Primary", "Cursor" }</td> | ||
| 1899 | <td valign="top" >Plane</td> | ||
| 1900 | <td valign="top" >Plane type</td> | ||
| 1901 | </tr> | ||
| 1902 | <tr> | ||
| 1903 | <td valign="top" >“SRC_X”</td> | ||
| 1904 | <td valign="top" >RANGE</td> | ||
| 1905 | <td valign="top" >Min=0, Max=UINT_MAX</td> | ||
| 1906 | <td valign="top" >Plane</td> | ||
| 1907 | <td valign="top" >Scanout source x coordinate in 16.16 fixed point (atomic)</td> | ||
| 1908 | </tr> | ||
| 1909 | <tr> | ||
| 1910 | <td valign="top" >“SRC_Y”</td> | ||
| 1911 | <td valign="top" >RANGE</td> | ||
| 1912 | <td valign="top" >Min=0, Max=UINT_MAX</td> | ||
| 1913 | <td valign="top" >Plane</td> | ||
| 1914 | <td valign="top" >Scanout source y coordinate in 16.16 fixed point (atomic)</td> | ||
| 1915 | </tr> | ||
| 1916 | <tr> | ||
| 1917 | <td valign="top" >“SRC_W”</td> | ||
| 1918 | <td valign="top" >RANGE</td> | ||
| 1919 | <td valign="top" >Min=0, Max=UINT_MAX</td> | ||
| 1920 | <td valign="top" >Plane</td> | ||
| 1921 | <td valign="top" >Scanout source width in 16.16 fixed point (atomic)</td> | ||
| 1922 | </tr> | ||
| 1923 | <tr> | ||
| 1924 | <td valign="top" >“SRC_H”</td> | ||
| 1925 | <td valign="top" >RANGE</td> | ||
| 1926 | <td valign="top" >Min=0, Max=UINT_MAX</td> | ||
| 1927 | <td valign="top" >Plane</td> | ||
| 1928 | <td valign="top" >Scanout source height in 16.16 fixed point (atomic)</td> | ||
| 1929 | </tr> | ||
| 1930 | <tr> | ||
| 1931 | <td valign="top" >“CRTC_X”</td> | ||
| 1932 | <td valign="top" >SIGNED_RANGE</td> | ||
| 1933 | <td valign="top" >Min=INT_MIN, Max=INT_MAX</td> | ||
| 1934 | <td valign="top" >Plane</td> | ||
| 1935 | <td valign="top" >Scanout CRTC (destination) x coordinate (atomic)</td> | ||
| 1936 | </tr> | ||
| 1937 | <tr> | ||
| 1938 | <td valign="top" >“CRTC_Y”</td> | ||
| 1939 | <td valign="top" >SIGNED_RANGE</td> | ||
| 1940 | <td valign="top" >Min=INT_MIN, Max=INT_MAX</td> | ||
| 1941 | <td valign="top" >Plane</td> | ||
| 1942 | <td valign="top" >Scanout CRTC (destination) y coordinate (atomic)</td> | ||
| 1943 | </tr> | ||
| 1944 | <tr> | ||
| 1945 | <td valign="top" >“CRTC_W”</td> | ||
| 1946 | <td valign="top" >RANGE</td> | ||
| 1947 | <td valign="top" >Min=0, Max=UINT_MAX</td> | ||
| 1948 | <td valign="top" >Plane</td> | ||
| 1949 | <td valign="top" >Scanout CRTC (destination) width (atomic)</td> | ||
| 1950 | </tr> | ||
| 1951 | <tr> | ||
| 1952 | <td valign="top" >“CRTC_H”</td> | ||
| 1953 | <td valign="top" >RANGE</td> | ||
| 1954 | <td valign="top" >Min=0, Max=UINT_MAX</td> | ||
| 1955 | <td valign="top" >Plane</td> | ||
| 1956 | <td valign="top" >Scanout CRTC (destination) height (atomic)</td> | ||
| 1957 | </tr> | ||
| 1958 | <tr> | ||
| 1959 | <td valign="top" >“FB_ID”</td> | ||
| 1960 | <td valign="top" >OBJECT</td> | ||
| 1961 | <td valign="top" >DRM_MODE_OBJECT_FB</td> | ||
| 1962 | <td valign="top" >Plane</td> | ||
| 1963 | <td valign="top" >Scanout framebuffer (atomic)</td> | ||
| 1964 | </tr> | ||
| 1965 | <tr> | ||
| 1966 | <td valign="top" >“CRTC_ID”</td> | ||
| 1967 | <td valign="top" >OBJECT</td> | ||
| 1968 | <td valign="top" >DRM_MODE_OBJECT_CRTC</td> | ||
| 1969 | <td valign="top" >Plane</td> | ||
| 1970 | <td valign="top" >CRTC that plane is attached to (atomic)</td> | ||
| 1971 | </tr> | ||
| 1972 | <tr> | ||
| 1973 | <td rowspan="2" valign="top" >DVI-I</td> | ||
| 1974 | <td valign="top" >“subconnector”</td> | ||
| 1975 | <td valign="top" >ENUM</td> | ||
| 1976 | <td valign="top" >{ “Unknown”, “DVI-D”, “DVI-A” }</td> | ||
| 1977 | <td valign="top" >Connector</td> | ||
| 1978 | <td valign="top" >TBD</td> | ||
| 1979 | </tr> | ||
| 1980 | <tr> | ||
| 1981 | <td valign="top" >“select subconnector”</td> | ||
| 1982 | <td valign="top" >ENUM</td> | ||
| 1983 | <td valign="top" >{ “Automatic”, “DVI-D”, “DVI-A” }</td> | ||
| 1984 | <td valign="top" >Connector</td> | ||
| 1985 | <td valign="top" >TBD</td> | ||
| 1986 | </tr> | ||
| 1987 | <tr> | ||
| 1988 | <td rowspan="13" valign="top" >TV</td> | ||
| 1989 | <td valign="top" >“subconnector”</td> | ||
| 1990 | <td valign="top" >ENUM</td> | ||
| 1991 | <td valign="top" >{ "Unknown", "Composite", "SVIDEO", "Component", "SCART" }</td> | ||
| 1992 | <td valign="top" >Connector</td> | ||
| 1993 | <td valign="top" >TBD</td> | ||
| 1994 | </tr> | ||
| 1995 | <tr> | ||
| 1996 | <td valign="top" >“select subconnector”</td> | ||
| 1997 | <td valign="top" >ENUM</td> | ||
| 1998 | <td valign="top" >{ "Automatic", "Composite", "SVIDEO", "Component", "SCART" }</td> | ||
| 1999 | <td valign="top" >Connector</td> | ||
| 2000 | <td valign="top" >TBD</td> | ||
| 2001 | </tr> | ||
| 2002 | <tr> | ||
| 2003 | <td valign="top" >“mode”</td> | ||
| 2004 | <td valign="top" >ENUM</td> | ||
| 2005 | <td valign="top" >{ "NTSC_M", "NTSC_J", "NTSC_443", "PAL_B" } etc.</td> | ||
| 2006 | <td valign="top" >Connector</td> | ||
| 2007 | <td valign="top" >TBD</td> | ||
| 2008 | </tr> | ||
| 2009 | <tr> | ||
| 2010 | <td valign="top" >“left margin”</td> | ||
| 2011 | <td valign="top" >RANGE</td> | ||
| 2012 | <td valign="top" >Min=0, Max=100</td> | ||
| 2013 | <td valign="top" >Connector</td> | ||
| 2014 | <td valign="top" >TBD</td> | ||
| 2015 | </tr> | ||
| 2016 | <tr> | ||
| 2017 | <td valign="top" >“right margin”</td> | ||
| 2018 | <td valign="top" >RANGE</td> | ||
| 2019 | <td valign="top" >Min=0, Max=100</td> | ||
| 2020 | <td valign="top" >Connector</td> | ||
| 2021 | <td valign="top" >TBD</td> | ||
| 2022 | </tr> | ||
| 2023 | <tr> | ||
| 2024 | <td valign="top" >“top margin”</td> | ||
| 2025 | <td valign="top" >RANGE</td> | ||
| 2026 | <td valign="top" >Min=0, Max=100</td> | ||
| 2027 | <td valign="top" >Connector</td> | ||
| 2028 | <td valign="top" >TBD</td> | ||
| 2029 | </tr> | ||
| 2030 | <tr> | ||
| 2031 | <td valign="top" >“bottom margin”</td> | ||
| 2032 | <td valign="top" >RANGE</td> | ||
| 2033 | <td valign="top" >Min=0, Max=100</td> | ||
| 2034 | <td valign="top" >Connector</td> | ||
| 2035 | <td valign="top" >TBD</td> | ||
| 2036 | </tr> | ||
| 2037 | <tr> | ||
| 2038 | <td valign="top" >“brightness”</td> | ||
| 2039 | <td valign="top" >RANGE</td> | ||
| 2040 | <td valign="top" >Min=0, Max=100</td> | ||
| 2041 | <td valign="top" >Connector</td> | ||
| 2042 | <td valign="top" >TBD</td> | ||
| 2043 | </tr> | ||
| 2044 | <tr> | ||
| 2045 | <td valign="top" >“contrast”</td> | ||
| 2046 | <td valign="top" >RANGE</td> | ||
| 2047 | <td valign="top" >Min=0, Max=100</td> | ||
| 2048 | <td valign="top" >Connector</td> | ||
| 2049 | <td valign="top" >TBD</td> | ||
| 2050 | </tr> | ||
| 2051 | <tr> | ||
| 2052 | <td valign="top" >“flicker reduction”</td> | ||
| 2053 | <td valign="top" >RANGE</td> | ||
| 2054 | <td valign="top" >Min=0, Max=100</td> | ||
| 2055 | <td valign="top" >Connector</td> | ||
| 2056 | <td valign="top" >TBD</td> | ||
| 2057 | </tr> | ||
| 2058 | <tr> | ||
| 2059 | <td valign="top" >“overscan”</td> | ||
| 2060 | <td valign="top" >RANGE</td> | ||
| 2061 | <td valign="top" >Min=0, Max=100</td> | ||
| 2062 | <td valign="top" >Connector</td> | ||
| 2063 | <td valign="top" >TBD</td> | ||
| 2064 | </tr> | ||
| 2065 | <tr> | ||
| 2066 | <td valign="top" >“saturation”</td> | ||
| 2067 | <td valign="top" >RANGE</td> | ||
| 2068 | <td valign="top" >Min=0, Max=100</td> | ||
| 2069 | <td valign="top" >Connector</td> | ||
| 2070 | <td valign="top" >TBD</td> | ||
| 2071 | </tr> | ||
| 2072 | <tr> | ||
| 2073 | <td valign="top" >“hue”</td> | ||
| 2074 | <td valign="top" >RANGE</td> | ||
| 2075 | <td valign="top" >Min=0, Max=100</td> | ||
| 2076 | <td valign="top" >Connector</td> | ||
| 2077 | <td valign="top" >TBD</td> | ||
| 2078 | </tr> | ||
| 2079 | <tr> | ||
| 2080 | <td rowspan="2" valign="top" >Virtual GPU</td> | ||
| 2081 | <td valign="top" >“suggested X”</td> | ||
| 2082 | <td valign="top" >RANGE</td> | ||
| 2083 | <td valign="top" >Min=0, Max=0xffffffff</td> | ||
| 2084 | <td valign="top" >Connector</td> | ||
| 2085 | <td valign="top" >property to suggest an X offset for a connector</td> | ||
| 2086 | </tr> | ||
| 2087 | <tr> | ||
| 2088 | <td valign="top" >“suggested Y”</td> | ||
| 2089 | <td valign="top" >RANGE</td> | ||
| 2090 | <td valign="top" >Min=0, Max=0xffffffff</td> | ||
| 2091 | <td valign="top" >Connector</td> | ||
| 2092 | <td valign="top" >property to suggest an Y offset for a connector</td> | ||
| 2093 | </tr> | ||
| 2094 | <tr> | ||
| 2095 | <td rowspan="7" valign="top" >Optional</td> | ||
| 2096 | <td valign="top" >"aspect ratio"</td> | ||
| 2097 | <td valign="top" >ENUM</td> | ||
| 2098 | <td valign="top" >{ "None", "4:3", "16:9" }</td> | ||
| 2099 | <td valign="top" >Connector</td> | ||
| 2100 | <td valign="top" >TDB</td> | ||
| 2101 | </tr> | ||
| 2102 | <tr> | ||
| 2103 | <td valign="top" >“dirty”</td> | ||
| 2104 | <td valign="top" >ENUM | IMMUTABLE</td> | ||
| 2105 | <td valign="top" >{ "Off", "On", "Annotate" }</td> | ||
| 2106 | <td valign="top" >Connector</td> | ||
| 2107 | <td valign="top" >TBD</td> | ||
| 2108 | </tr> | ||
| 2109 | <tr> | ||
| 2110 | <td valign="top" >“DEGAMMA_LUT”</td> | ||
| 2111 | <td valign="top" >BLOB</td> | ||
| 2112 | <td valign="top" >0</td> | ||
| 2113 | <td valign="top" >CRTC</td> | ||
| 2114 | <td valign="top" >DRM property to set the degamma lookup table | ||
| 2115 | (LUT) mapping pixel data from the framebuffer before it is | ||
| 2116 | given to the transformation matrix. The data is an interpreted | ||
| 2117 | as an array of struct drm_color_lut elements. Hardware might | ||
| 2118 | choose not to use the full precision of the LUT elements nor | ||
| 2119 | use all the elements of the LUT (for example the hardware | ||
| 2120 | might choose to interpolate between LUT[0] and LUT[4]). </td> | ||
| 2121 | </tr> | ||
| 2122 | <tr> | ||
| 2123 | <td valign="top" >“DEGAMMA_LUT_SIZE”</td> | ||
| 2124 | <td valign="top" >RANGE | IMMUTABLE</td> | ||
| 2125 | <td valign="top" >Min=0, Max=UINT_MAX</td> | ||
| 2126 | <td valign="top" >CRTC</td> | ||
| 2127 | <td valign="top" >DRM property to gives the size of the lookup | ||
| 2128 | table to be set on the DEGAMMA_LUT property (the size depends | ||
| 2129 | on the underlying hardware).</td> | ||
| 2130 | </tr> | ||
| 2131 | <tr> | ||
| 2132 | <td valign="top" >“CTM”</td> | ||
| 2133 | <td valign="top" >BLOB</td> | ||
| 2134 | <td valign="top" >0</td> | ||
| 2135 | <td valign="top" >CRTC</td> | ||
| 2136 | <td valign="top" >DRM property to set the current | ||
| 2137 | transformation matrix (CTM) apply to pixel data after the | ||
| 2138 | lookup through the degamma LUT and before the lookup through | ||
| 2139 | the gamma LUT. The data is an interpreted as a struct | ||
| 2140 | drm_color_ctm.</td> | ||
| 2141 | </tr> | ||
| 2142 | <tr> | ||
| 2143 | <td valign="top" >“GAMMA_LUT”</td> | ||
| 2144 | <td valign="top" >BLOB</td> | ||
| 2145 | <td valign="top" >0</td> | ||
| 2146 | <td valign="top" >CRTC</td> | ||
| 2147 | <td valign="top" >DRM property to set the gamma lookup table | ||
| 2148 | (LUT) mapping pixel data after to the transformation matrix to | ||
| 2149 | data sent to the connector. The data is an interpreted as an | ||
| 2150 | array of struct drm_color_lut elements. Hardware might choose | ||
| 2151 | not to use the full precision of the LUT elements nor use all | ||
| 2152 | the elements of the LUT (for example the hardware might choose | ||
| 2153 | to interpolate between LUT[0] and LUT[4]).</td> | ||
| 2154 | </tr> | ||
| 2155 | <tr> | ||
| 2156 | <td valign="top" >“GAMMA_LUT_SIZE”</td> | ||
| 2157 | <td valign="top" >RANGE | IMMUTABLE</td> | ||
| 2158 | <td valign="top" >Min=0, Max=UINT_MAX</td> | ||
| 2159 | <td valign="top" >CRTC</td> | ||
| 2160 | <td valign="top" >DRM property to gives the size of the lookup | ||
| 2161 | table to be set on the GAMMA_LUT property (the size depends on | ||
| 2162 | the underlying hardware).</td> | ||
| 2163 | </tr> | ||
| 2164 | <tr> | ||
| 2165 | <td rowspan="20" valign="top" >i915</td> | ||
| 2166 | <td rowspan="2" valign="top" >Generic</td> | ||
| 2167 | <td valign="top" >"Broadcast RGB"</td> | ||
| 2168 | <td valign="top" >ENUM</td> | ||
| 2169 | <td valign="top" >{ "Automatic", "Full", "Limited 16:235" }</td> | ||
| 2170 | <td valign="top" >Connector</td> | ||
| 2171 | <td valign="top" >When this property is set to Limited 16:235 | ||
| 2172 | and CTM is set, the hardware will be programmed with the | ||
| 2173 | result of the multiplication of CTM by the limited range | ||
| 2174 | matrix to ensure the pixels normaly in the range 0..1.0 are | ||
| 2175 | remapped to the range 16/255..235/255.</td> | ||
| 2176 | </tr> | ||
| 2177 | <tr> | ||
| 2178 | <td valign="top" >“audio”</td> | ||
| 2179 | <td valign="top" >ENUM</td> | ||
| 2180 | <td valign="top" >{ "force-dvi", "off", "auto", "on" }</td> | ||
| 2181 | <td valign="top" >Connector</td> | ||
| 2182 | <td valign="top" >TBD</td> | ||
| 2183 | </tr> | ||
| 2184 | <tr> | ||
| 2185 | <td rowspan="17" valign="top" >SDVO-TV</td> | ||
| 2186 | <td valign="top" >“mode”</td> | ||
| 2187 | <td valign="top" >ENUM</td> | ||
| 2188 | <td valign="top" >{ "NTSC_M", "NTSC_J", "NTSC_443", "PAL_B" } etc.</td> | ||
| 2189 | <td valign="top" >Connector</td> | ||
| 2190 | <td valign="top" >TBD</td> | ||
| 2191 | </tr> | ||
| 2192 | <tr> | ||
| 2193 | <td valign="top" >"left_margin"</td> | ||
| 2194 | <td valign="top" >RANGE</td> | ||
| 2195 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2196 | <td valign="top" >Connector</td> | ||
| 2197 | <td valign="top" >TBD</td> | ||
| 2198 | </tr> | ||
| 2199 | <tr> | ||
| 2200 | <td valign="top" >"right_margin"</td> | ||
| 2201 | <td valign="top" >RANGE</td> | ||
| 2202 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2203 | <td valign="top" >Connector</td> | ||
| 2204 | <td valign="top" >TBD</td> | ||
| 2205 | </tr> | ||
| 2206 | <tr> | ||
| 2207 | <td valign="top" >"top_margin"</td> | ||
| 2208 | <td valign="top" >RANGE</td> | ||
| 2209 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2210 | <td valign="top" >Connector</td> | ||
| 2211 | <td valign="top" >TBD</td> | ||
| 2212 | </tr> | ||
| 2213 | <tr> | ||
| 2214 | <td valign="top" >"bottom_margin"</td> | ||
| 2215 | <td valign="top" >RANGE</td> | ||
| 2216 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2217 | <td valign="top" >Connector</td> | ||
| 2218 | <td valign="top" >TBD</td> | ||
| 2219 | </tr> | ||
| 2220 | <tr> | ||
| 2221 | <td valign="top" >“hpos”</td> | ||
| 2222 | <td valign="top" >RANGE</td> | ||
| 2223 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2224 | <td valign="top" >Connector</td> | ||
| 2225 | <td valign="top" >TBD</td> | ||
| 2226 | </tr> | ||
| 2227 | <tr> | ||
| 2228 | <td valign="top" >“vpos”</td> | ||
| 2229 | <td valign="top" >RANGE</td> | ||
| 2230 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2231 | <td valign="top" >Connector</td> | ||
| 2232 | <td valign="top" >TBD</td> | ||
| 2233 | </tr> | ||
| 2234 | <tr> | ||
| 2235 | <td valign="top" >“contrast”</td> | ||
| 2236 | <td valign="top" >RANGE</td> | ||
| 2237 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2238 | <td valign="top" >Connector</td> | ||
| 2239 | <td valign="top" >TBD</td> | ||
| 2240 | </tr> | ||
| 2241 | <tr> | ||
| 2242 | <td valign="top" >“saturation”</td> | ||
| 2243 | <td valign="top" >RANGE</td> | ||
| 2244 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2245 | <td valign="top" >Connector</td> | ||
| 2246 | <td valign="top" >TBD</td> | ||
| 2247 | </tr> | ||
| 2248 | <tr> | ||
| 2249 | <td valign="top" >“hue”</td> | ||
| 2250 | <td valign="top" >RANGE</td> | ||
| 2251 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2252 | <td valign="top" >Connector</td> | ||
| 2253 | <td valign="top" >TBD</td> | ||
| 2254 | </tr> | ||
| 2255 | <tr> | ||
| 2256 | <td valign="top" >“sharpness”</td> | ||
| 2257 | <td valign="top" >RANGE</td> | ||
| 2258 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2259 | <td valign="top" >Connector</td> | ||
| 2260 | <td valign="top" >TBD</td> | ||
| 2261 | </tr> | ||
| 2262 | <tr> | ||
| 2263 | <td valign="top" >“flicker_filter”</td> | ||
| 2264 | <td valign="top" >RANGE</td> | ||
| 2265 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2266 | <td valign="top" >Connector</td> | ||
| 2267 | <td valign="top" >TBD</td> | ||
| 2268 | </tr> | ||
| 2269 | <tr> | ||
| 2270 | <td valign="top" >“flicker_filter_adaptive”</td> | ||
| 2271 | <td valign="top" >RANGE</td> | ||
| 2272 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2273 | <td valign="top" >Connector</td> | ||
| 2274 | <td valign="top" >TBD</td> | ||
| 2275 | </tr> | ||
| 2276 | <tr> | ||
| 2277 | <td valign="top" >“flicker_filter_2d”</td> | ||
| 2278 | <td valign="top" >RANGE</td> | ||
| 2279 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2280 | <td valign="top" >Connector</td> | ||
| 2281 | <td valign="top" >TBD</td> | ||
| 2282 | </tr> | ||
| 2283 | <tr> | ||
| 2284 | <td valign="top" >“tv_chroma_filter”</td> | ||
| 2285 | <td valign="top" >RANGE</td> | ||
| 2286 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2287 | <td valign="top" >Connector</td> | ||
| 2288 | <td valign="top" >TBD</td> | ||
| 2289 | </tr> | ||
| 2290 | <tr> | ||
| 2291 | <td valign="top" >“tv_luma_filter”</td> | ||
| 2292 | <td valign="top" >RANGE</td> | ||
| 2293 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2294 | <td valign="top" >Connector</td> | ||
| 2295 | <td valign="top" >TBD</td> | ||
| 2296 | </tr> | ||
| 2297 | <tr> | ||
| 2298 | <td valign="top" >“dot_crawl”</td> | ||
| 2299 | <td valign="top" >RANGE</td> | ||
| 2300 | <td valign="top" >Min=0, Max=1</td> | ||
| 2301 | <td valign="top" >Connector</td> | ||
| 2302 | <td valign="top" >TBD</td> | ||
| 2303 | </tr> | ||
| 2304 | <tr> | ||
| 2305 | <td valign="top" >SDVO-TV/LVDS</td> | ||
| 2306 | <td valign="top" >“brightness”</td> | ||
| 2307 | <td valign="top" >RANGE</td> | ||
| 2308 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2309 | <td valign="top" >Connector</td> | ||
| 2310 | <td valign="top" >TBD</td> | ||
| 2311 | </tr> | ||
| 2312 | <tr> | ||
| 2313 | <td rowspan="2" valign="top" >CDV gma-500</td> | ||
| 2314 | <td rowspan="2" valign="top" >Generic</td> | ||
| 2315 | <td valign="top" >"Broadcast RGB"</td> | ||
| 2316 | <td valign="top" >ENUM</td> | ||
| 2317 | <td valign="top" >{ “Full”, “Limited 16:235” }</td> | ||
| 2318 | <td valign="top" >Connector</td> | ||
| 2319 | <td valign="top" >TBD</td> | ||
| 2320 | </tr> | ||
| 2321 | <tr> | ||
| 2322 | <td valign="top" >"Broadcast RGB"</td> | ||
| 2323 | <td valign="top" >ENUM</td> | ||
| 2324 | <td valign="top" >{ “off”, “auto”, “on” }</td> | ||
| 2325 | <td valign="top" >Connector</td> | ||
| 2326 | <td valign="top" >TBD</td> | ||
| 2327 | </tr> | ||
| 2328 | <tr> | ||
| 2329 | <td rowspan="19" valign="top" >Poulsbo</td> | ||
| 2330 | <td rowspan="1" valign="top" >Generic</td> | ||
| 2331 | <td valign="top" >“backlight”</td> | ||
| 2332 | <td valign="top" >RANGE</td> | ||
| 2333 | <td valign="top" >Min=0, Max=100</td> | ||
| 2334 | <td valign="top" >Connector</td> | ||
| 2335 | <td valign="top" >TBD</td> | ||
| 2336 | </tr> | ||
| 2337 | <tr> | ||
| 2338 | <td rowspan="17" valign="top" >SDVO-TV</td> | ||
| 2339 | <td valign="top" >“mode”</td> | ||
| 2340 | <td valign="top" >ENUM</td> | ||
| 2341 | <td valign="top" >{ "NTSC_M", "NTSC_J", "NTSC_443", "PAL_B" } etc.</td> | ||
| 2342 | <td valign="top" >Connector</td> | ||
| 2343 | <td valign="top" >TBD</td> | ||
| 2344 | </tr> | ||
| 2345 | <tr> | ||
| 2346 | <td valign="top" >"left_margin"</td> | ||
| 2347 | <td valign="top" >RANGE</td> | ||
| 2348 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2349 | <td valign="top" >Connector</td> | ||
| 2350 | <td valign="top" >TBD</td> | ||
| 2351 | </tr> | ||
| 2352 | <tr> | ||
| 2353 | <td valign="top" >"right_margin"</td> | ||
| 2354 | <td valign="top" >RANGE</td> | ||
| 2355 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2356 | <td valign="top" >Connector</td> | ||
| 2357 | <td valign="top" >TBD</td> | ||
| 2358 | </tr> | ||
| 2359 | <tr> | ||
| 2360 | <td valign="top" >"top_margin"</td> | ||
| 2361 | <td valign="top" >RANGE</td> | ||
| 2362 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2363 | <td valign="top" >Connector</td> | ||
| 2364 | <td valign="top" >TBD</td> | ||
| 2365 | </tr> | ||
| 2366 | <tr> | ||
| 2367 | <td valign="top" >"bottom_margin"</td> | ||
| 2368 | <td valign="top" >RANGE</td> | ||
| 2369 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2370 | <td valign="top" >Connector</td> | ||
| 2371 | <td valign="top" >TBD</td> | ||
| 2372 | </tr> | ||
| 2373 | <tr> | ||
| 2374 | <td valign="top" >“hpos”</td> | ||
| 2375 | <td valign="top" >RANGE</td> | ||
| 2376 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2377 | <td valign="top" >Connector</td> | ||
| 2378 | <td valign="top" >TBD</td> | ||
| 2379 | </tr> | ||
| 2380 | <tr> | ||
| 2381 | <td valign="top" >“vpos”</td> | ||
| 2382 | <td valign="top" >RANGE</td> | ||
| 2383 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2384 | <td valign="top" >Connector</td> | ||
| 2385 | <td valign="top" >TBD</td> | ||
| 2386 | </tr> | ||
| 2387 | <tr> | ||
| 2388 | <td valign="top" >“contrast”</td> | ||
| 2389 | <td valign="top" >RANGE</td> | ||
| 2390 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2391 | <td valign="top" >Connector</td> | ||
| 2392 | <td valign="top" >TBD</td> | ||
| 2393 | </tr> | ||
| 2394 | <tr> | ||
| 2395 | <td valign="top" >“saturation”</td> | ||
| 2396 | <td valign="top" >RANGE</td> | ||
| 2397 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2398 | <td valign="top" >Connector</td> | ||
| 2399 | <td valign="top" >TBD</td> | ||
| 2400 | </tr> | ||
| 2401 | <tr> | ||
| 2402 | <td valign="top" >“hue”</td> | ||
| 2403 | <td valign="top" >RANGE</td> | ||
| 2404 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2405 | <td valign="top" >Connector</td> | ||
| 2406 | <td valign="top" >TBD</td> | ||
| 2407 | </tr> | ||
| 2408 | <tr> | ||
| 2409 | <td valign="top" >“sharpness”</td> | ||
| 2410 | <td valign="top" >RANGE</td> | ||
| 2411 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2412 | <td valign="top" >Connector</td> | ||
| 2413 | <td valign="top" >TBD</td> | ||
| 2414 | </tr> | ||
| 2415 | <tr> | ||
| 2416 | <td valign="top" >“flicker_filter”</td> | ||
| 2417 | <td valign="top" >RANGE</td> | ||
| 2418 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2419 | <td valign="top" >Connector</td> | ||
| 2420 | <td valign="top" >TBD</td> | ||
| 2421 | </tr> | ||
| 2422 | <tr> | ||
| 2423 | <td valign="top" >“flicker_filter_adaptive”</td> | ||
| 2424 | <td valign="top" >RANGE</td> | ||
| 2425 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2426 | <td valign="top" >Connector</td> | ||
| 2427 | <td valign="top" >TBD</td> | ||
| 2428 | </tr> | ||
| 2429 | <tr> | ||
| 2430 | <td valign="top" >“flicker_filter_2d”</td> | ||
| 2431 | <td valign="top" >RANGE</td> | ||
| 2432 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2433 | <td valign="top" >Connector</td> | ||
| 2434 | <td valign="top" >TBD</td> | ||
| 2435 | </tr> | ||
| 2436 | <tr> | ||
| 2437 | <td valign="top" >“tv_chroma_filter”</td> | ||
| 2438 | <td valign="top" >RANGE</td> | ||
| 2439 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2440 | <td valign="top" >Connector</td> | ||
| 2441 | <td valign="top" >TBD</td> | ||
| 2442 | </tr> | ||
| 2443 | <tr> | ||
| 2444 | <td valign="top" >“tv_luma_filter”</td> | ||
| 2445 | <td valign="top" >RANGE</td> | ||
| 2446 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2447 | <td valign="top" >Connector</td> | ||
| 2448 | <td valign="top" >TBD</td> | ||
| 2449 | </tr> | ||
| 2450 | <tr> | ||
| 2451 | <td valign="top" >“dot_crawl”</td> | ||
| 2452 | <td valign="top" >RANGE</td> | ||
| 2453 | <td valign="top" >Min=0, Max=1</td> | ||
| 2454 | <td valign="top" >Connector</td> | ||
| 2455 | <td valign="top" >TBD</td> | ||
| 2456 | </tr> | ||
| 2457 | <tr> | ||
| 2458 | <td valign="top" >SDVO-TV/LVDS</td> | ||
| 2459 | <td valign="top" >“brightness”</td> | ||
| 2460 | <td valign="top" >RANGE</td> | ||
| 2461 | <td valign="top" >Min=0, Max= SDVO dependent</td> | ||
| 2462 | <td valign="top" >Connector</td> | ||
| 2463 | <td valign="top" >TBD</td> | ||
| 2464 | </tr> | ||
| 2465 | <tr> | ||
| 2466 | <td rowspan="11" valign="top" >armada</td> | ||
| 2467 | <td rowspan="2" valign="top" >CRTC</td> | ||
| 2468 | <td valign="top" >"CSC_YUV"</td> | ||
| 2469 | <td valign="top" >ENUM</td> | ||
| 2470 | <td valign="top" >{ "Auto" , "CCIR601", "CCIR709" }</td> | ||
| 2471 | <td valign="top" >CRTC</td> | ||
| 2472 | <td valign="top" >TBD</td> | ||
| 2473 | </tr> | ||
| 2474 | <tr> | ||
| 2475 | <td valign="top" >"CSC_RGB"</td> | ||
| 2476 | <td valign="top" >ENUM</td> | ||
| 2477 | <td valign="top" >{ "Auto", "Computer system", "Studio" }</td> | ||
| 2478 | <td valign="top" >CRTC</td> | ||
| 2479 | <td valign="top" >TBD</td> | ||
| 2480 | </tr> | ||
| 2481 | <tr> | ||
| 2482 | <td rowspan="9" valign="top" >Overlay</td> | ||
| 2483 | <td valign="top" >"colorkey"</td> | ||
| 2484 | <td valign="top" >RANGE</td> | ||
| 2485 | <td valign="top" >Min=0, Max=0xffffff</td> | ||
| 2486 | <td valign="top" >Plane</td> | ||
| 2487 | <td valign="top" >TBD</td> | ||
| 2488 | </tr> | ||
| 2489 | <tr> | ||
| 2490 | <td valign="top" >"colorkey_min"</td> | ||
| 2491 | <td valign="top" >RANGE</td> | ||
| 2492 | <td valign="top" >Min=0, Max=0xffffff</td> | ||
| 2493 | <td valign="top" >Plane</td> | ||
| 2494 | <td valign="top" >TBD</td> | ||
| 2495 | </tr> | ||
| 2496 | <tr> | ||
| 2497 | <td valign="top" >"colorkey_max"</td> | ||
| 2498 | <td valign="top" >RANGE</td> | ||
| 2499 | <td valign="top" >Min=0, Max=0xffffff</td> | ||
| 2500 | <td valign="top" >Plane</td> | ||
| 2501 | <td valign="top" >TBD</td> | ||
| 2502 | </tr> | ||
| 2503 | <tr> | ||
| 2504 | <td valign="top" >"colorkey_val"</td> | ||
| 2505 | <td valign="top" >RANGE</td> | ||
| 2506 | <td valign="top" >Min=0, Max=0xffffff</td> | ||
| 2507 | <td valign="top" >Plane</td> | ||
| 2508 | <td valign="top" >TBD</td> | ||
| 2509 | </tr> | ||
| 2510 | <tr> | ||
| 2511 | <td valign="top" >"colorkey_alpha"</td> | ||
| 2512 | <td valign="top" >RANGE</td> | ||
| 2513 | <td valign="top" >Min=0, Max=0xffffff</td> | ||
| 2514 | <td valign="top" >Plane</td> | ||
| 2515 | <td valign="top" >TBD</td> | ||
| 2516 | </tr> | ||
| 2517 | <tr> | ||
| 2518 | <td valign="top" >"colorkey_mode"</td> | ||
| 2519 | <td valign="top" >ENUM</td> | ||
| 2520 | <td valign="top" >{ "disabled", "Y component", "U component" | ||
| 2521 | , "V component", "RGB", “R component", "G component", "B component" }</td> | ||
| 2522 | <td valign="top" >Plane</td> | ||
| 2523 | <td valign="top" >TBD</td> | ||
| 2524 | </tr> | ||
| 2525 | <tr> | ||
| 2526 | <td valign="top" >"brightness"</td> | ||
| 2527 | <td valign="top" >RANGE</td> | ||
| 2528 | <td valign="top" >Min=0, Max=256 + 255</td> | ||
| 2529 | <td valign="top" >Plane</td> | ||
| 2530 | <td valign="top" >TBD</td> | ||
| 2531 | </tr> | ||
| 2532 | <tr> | ||
| 2533 | <td valign="top" >"contrast"</td> | ||
| 2534 | <td valign="top" >RANGE</td> | ||
| 2535 | <td valign="top" >Min=0, Max=0x7fff</td> | ||
| 2536 | <td valign="top" >Plane</td> | ||
| 2537 | <td valign="top" >TBD</td> | ||
| 2538 | </tr> | ||
| 2539 | <tr> | ||
| 2540 | <td valign="top" >"saturation"</td> | ||
| 2541 | <td valign="top" >RANGE</td> | ||
| 2542 | <td valign="top" >Min=0, Max=0x7fff</td> | ||
| 2543 | <td valign="top" >Plane</td> | ||
| 2544 | <td valign="top" >TBD</td> | ||
| 2545 | </tr> | ||
| 2546 | <tr> | ||
| 2547 | <td rowspan="2" valign="top" >exynos</td> | ||
| 2548 | <td valign="top" >CRTC</td> | ||
| 2549 | <td valign="top" >“mode”</td> | ||
| 2550 | <td valign="top" >ENUM</td> | ||
| 2551 | <td valign="top" >{ "normal", "blank" }</td> | ||
| 2552 | <td valign="top" >CRTC</td> | ||
| 2553 | <td valign="top" >TBD</td> | ||
| 2554 | </tr> | ||
| 2555 | <tr> | ||
| 2556 | <td valign="top" >Overlay</td> | ||
| 2557 | <td valign="top" >“zpos”</td> | ||
| 2558 | <td valign="top" >RANGE</td> | ||
| 2559 | <td valign="top" >Min=0, Max=MAX_PLANE-1</td> | ||
| 2560 | <td valign="top" >Plane</td> | ||
| 2561 | <td valign="top" >TBD</td> | ||
| 2562 | </tr> | ||
| 2563 | <tr> | ||
| 2564 | <td rowspan="2" valign="top" >i2c/ch7006_drv</td> | ||
| 2565 | <td valign="top" >Generic</td> | ||
| 2566 | <td valign="top" >“scale”</td> | ||
| 2567 | <td valign="top" >RANGE</td> | ||
| 2568 | <td valign="top" >Min=0, Max=2</td> | ||
| 2569 | <td valign="top" >Connector</td> | ||
| 2570 | <td valign="top" >TBD</td> | ||
| 2571 | </tr> | ||
| 2572 | <tr> | ||
| 2573 | <td rowspan="1" valign="top" >TV</td> | ||
| 2574 | <td valign="top" >“mode”</td> | ||
| 2575 | <td valign="top" >ENUM</td> | ||
| 2576 | <td valign="top" >{ "PAL", "PAL-M","PAL-N"}, ”PAL-Nc" | ||
| 2577 | , "PAL-60", "NTSC-M", "NTSC-J" }</td> | ||
| 2578 | <td valign="top" >Connector</td> | ||
| 2579 | <td valign="top" >TBD</td> | ||
| 2580 | </tr> | ||
| 2581 | <tr> | ||
| 2582 | <td rowspan="15" valign="top" >nouveau</td> | ||
| 2583 | <td rowspan="6" valign="top" >NV10 Overlay</td> | ||
| 2584 | <td valign="top" >"colorkey"</td> | ||
| 2585 | <td valign="top" >RANGE</td> | ||
| 2586 | <td valign="top" >Min=0, Max=0x01ffffff</td> | ||
| 2587 | <td valign="top" >Plane</td> | ||
| 2588 | <td valign="top" >TBD</td> | ||
| 2589 | </tr> | ||
| 2590 | <tr> | ||
| 2591 | <td valign="top" >“contrast”</td> | ||
| 2592 | <td valign="top" >RANGE</td> | ||
| 2593 | <td valign="top" >Min=0, Max=8192-1</td> | ||
| 2594 | <td valign="top" >Plane</td> | ||
| 2595 | <td valign="top" >TBD</td> | ||
| 2596 | </tr> | ||
| 2597 | <tr> | ||
| 2598 | <td valign="top" >“brightness”</td> | ||
| 2599 | <td valign="top" >RANGE</td> | ||
| 2600 | <td valign="top" >Min=0, Max=1024</td> | ||
| 2601 | <td valign="top" >Plane</td> | ||
| 2602 | <td valign="top" >TBD</td> | ||
| 2603 | </tr> | ||
| 2604 | <tr> | ||
| 2605 | <td valign="top" >“hue”</td> | ||
| 2606 | <td valign="top" >RANGE</td> | ||
| 2607 | <td valign="top" >Min=0, Max=359</td> | ||
| 2608 | <td valign="top" >Plane</td> | ||
| 2609 | <td valign="top" >TBD</td> | ||
| 2610 | </tr> | ||
| 2611 | <tr> | ||
| 2612 | <td valign="top" >“saturation”</td> | ||
| 2613 | <td valign="top" >RANGE</td> | ||
| 2614 | <td valign="top" >Min=0, Max=8192-1</td> | ||
| 2615 | <td valign="top" >Plane</td> | ||
| 2616 | <td valign="top" >TBD</td> | ||
| 2617 | </tr> | ||
| 2618 | <tr> | ||
| 2619 | <td valign="top" >“iturbt_709”</td> | ||
| 2620 | <td valign="top" >RANGE</td> | ||
| 2621 | <td valign="top" >Min=0, Max=1</td> | ||
| 2622 | <td valign="top" >Plane</td> | ||
| 2623 | <td valign="top" >TBD</td> | ||
| 2624 | </tr> | ||
| 2625 | <tr> | ||
| 2626 | <td rowspan="2" valign="top" >Nv04 Overlay</td> | ||
| 2627 | <td valign="top" >“colorkey”</td> | ||
| 2628 | <td valign="top" >RANGE</td> | ||
| 2629 | <td valign="top" >Min=0, Max=0x01ffffff</td> | ||
| 2630 | <td valign="top" >Plane</td> | ||
| 2631 | <td valign="top" >TBD</td> | ||
| 2632 | </tr> | ||
| 2633 | <tr> | ||
| 2634 | <td valign="top" >“brightness”</td> | ||
| 2635 | <td valign="top" >RANGE</td> | ||
| 2636 | <td valign="top" >Min=0, Max=1024</td> | ||
| 2637 | <td valign="top" >Plane</td> | ||
| 2638 | <td valign="top" >TBD</td> | ||
| 2639 | </tr> | ||
| 2640 | <tr> | ||
| 2641 | <td rowspan="7" valign="top" >Display</td> | ||
| 2642 | <td valign="top" >“dithering mode”</td> | ||
| 2643 | <td valign="top" >ENUM</td> | ||
| 2644 | <td valign="top" >{ "auto", "off", "on" }</td> | ||
| 2645 | <td valign="top" >Connector</td> | ||
| 2646 | <td valign="top" >TBD</td> | ||
| 2647 | </tr> | ||
| 2648 | <tr> | ||
| 2649 | <td valign="top" >“dithering depth”</td> | ||
| 2650 | <td valign="top" >ENUM</td> | ||
| 2651 | <td valign="top" >{ "auto", "off", "on", "static 2x2", "dynamic 2x2", "temporal" }</td> | ||
| 2652 | <td valign="top" >Connector</td> | ||
| 2653 | <td valign="top" >TBD</td> | ||
| 2654 | </tr> | ||
| 2655 | <tr> | ||
| 2656 | <td valign="top" >“underscan”</td> | ||
| 2657 | <td valign="top" >ENUM</td> | ||
| 2658 | <td valign="top" >{ "auto", "6 bpc", "8 bpc" }</td> | ||
| 2659 | <td valign="top" >Connector</td> | ||
| 2660 | <td valign="top" >TBD</td> | ||
| 2661 | </tr> | ||
| 2662 | <tr> | ||
| 2663 | <td valign="top" >“underscan hborder”</td> | ||
| 2664 | <td valign="top" >RANGE</td> | ||
| 2665 | <td valign="top" >Min=0, Max=128</td> | ||
| 2666 | <td valign="top" >Connector</td> | ||
| 2667 | <td valign="top" >TBD</td> | ||
| 2668 | </tr> | ||
| 2669 | <tr> | ||
| 2670 | <td valign="top" >“underscan vborder”</td> | ||
| 2671 | <td valign="top" >RANGE</td> | ||
| 2672 | <td valign="top" >Min=0, Max=128</td> | ||
| 2673 | <td valign="top" >Connector</td> | ||
| 2674 | <td valign="top" >TBD</td> | ||
| 2675 | </tr> | ||
| 2676 | <tr> | ||
| 2677 | <td valign="top" >“vibrant hue”</td> | ||
| 2678 | <td valign="top" >RANGE</td> | ||
| 2679 | <td valign="top" >Min=0, Max=180</td> | ||
| 2680 | <td valign="top" >Connector</td> | ||
| 2681 | <td valign="top" >TBD</td> | ||
| 2682 | </tr> | ||
| 2683 | <tr> | ||
| 2684 | <td valign="top" >“color vibrance”</td> | ||
| 2685 | <td valign="top" >RANGE</td> | ||
| 2686 | <td valign="top" >Min=0, Max=200</td> | ||
| 2687 | <td valign="top" >Connector</td> | ||
| 2688 | <td valign="top" >TBD</td> | ||
| 2689 | </tr> | ||
| 2690 | <tr> | ||
| 2691 | <td valign="top" >omap</td> | ||
| 2692 | <td valign="top" >Generic</td> | ||
| 2693 | <td valign="top" >“zorder”</td> | ||
| 2694 | <td valign="top" >RANGE</td> | ||
| 2695 | <td valign="top" >Min=0, Max=3</td> | ||
| 2696 | <td valign="top" >CRTC, Plane</td> | ||
| 2697 | <td valign="top" >TBD</td> | ||
| 2698 | </tr> | ||
| 2699 | <tr> | ||
| 2700 | <td valign="top" >qxl</td> | ||
| 2701 | <td valign="top" >Generic</td> | ||
| 2702 | <td valign="top" >“hotplug_mode_update"</td> | ||
| 2703 | <td valign="top" >RANGE</td> | ||
| 2704 | <td valign="top" >Min=0, Max=1</td> | ||
| 2705 | <td valign="top" >Connector</td> | ||
| 2706 | <td valign="top" >TBD</td> | ||
| 2707 | </tr> | ||
| 2708 | <tr> | ||
| 2709 | <td rowspan="9" valign="top" >radeon</td> | ||
| 2710 | <td valign="top" >DVI-I</td> | ||
| 2711 | <td valign="top" >“coherent”</td> | ||
| 2712 | <td valign="top" >RANGE</td> | ||
| 2713 | <td valign="top" >Min=0, Max=1</td> | ||
| 2714 | <td valign="top" >Connector</td> | ||
| 2715 | <td valign="top" >TBD</td> | ||
| 2716 | </tr> | ||
| 2717 | <tr> | ||
| 2718 | <td valign="top" >DAC enable load detect</td> | ||
| 2719 | <td valign="top" >“load detection”</td> | ||
| 2720 | <td valign="top" >RANGE</td> | ||
| 2721 | <td valign="top" >Min=0, Max=1</td> | ||
| 2722 | <td valign="top" >Connector</td> | ||
| 2723 | <td valign="top" >TBD</td> | ||
| 2724 | </tr> | ||
| 2725 | <tr> | ||
| 2726 | <td valign="top" >TV Standard</td> | ||
| 2727 | <td valign="top" >"tv standard"</td> | ||
| 2728 | <td valign="top" >ENUM</td> | ||
| 2729 | <td valign="top" >{ "ntsc", "pal", "pal-m", "pal-60", "ntsc-j" | ||
| 2730 | , "scart-pal", "pal-cn", "secam" }</td> | ||
| 2731 | <td valign="top" >Connector</td> | ||
| 2732 | <td valign="top" >TBD</td> | ||
| 2733 | </tr> | ||
| 2734 | <tr> | ||
| 2735 | <td valign="top" >legacy TMDS PLL detect</td> | ||
| 2736 | <td valign="top" >"tmds_pll"</td> | ||
| 2737 | <td valign="top" >ENUM</td> | ||
| 2738 | <td valign="top" >{ "driver", "bios" }</td> | ||
| 2739 | <td valign="top" >-</td> | ||
| 2740 | <td valign="top" >TBD</td> | ||
| 2741 | </tr> | ||
| 2742 | <tr> | ||
| 2743 | <td rowspan="3" valign="top" >Underscan</td> | ||
| 2744 | <td valign="top" >"underscan"</td> | ||
| 2745 | <td valign="top" >ENUM</td> | ||
| 2746 | <td valign="top" >{ "off", "on", "auto" }</td> | ||
| 2747 | <td valign="top" >Connector</td> | ||
| 2748 | <td valign="top" >TBD</td> | ||
| 2749 | </tr> | ||
| 2750 | <tr> | ||
| 2751 | <td valign="top" >"underscan hborder"</td> | ||
| 2752 | <td valign="top" >RANGE</td> | ||
| 2753 | <td valign="top" >Min=0, Max=128</td> | ||
| 2754 | <td valign="top" >Connector</td> | ||
| 2755 | <td valign="top" >TBD</td> | ||
| 2756 | </tr> | ||
| 2757 | <tr> | ||
| 2758 | <td valign="top" >"underscan vborder"</td> | ||
| 2759 | <td valign="top" >RANGE</td> | ||
| 2760 | <td valign="top" >Min=0, Max=128</td> | ||
| 2761 | <td valign="top" >Connector</td> | ||
| 2762 | <td valign="top" >TBD</td> | ||
| 2763 | </tr> | ||
| 2764 | <tr> | ||
| 2765 | <td valign="top" >Audio</td> | ||
| 2766 | <td valign="top" >“audio”</td> | ||
| 2767 | <td valign="top" >ENUM</td> | ||
| 2768 | <td valign="top" >{ "off", "on", "auto" }</td> | ||
| 2769 | <td valign="top" >Connector</td> | ||
| 2770 | <td valign="top" >TBD</td> | ||
| 2771 | </tr> | ||
| 2772 | <tr> | ||
| 2773 | <td valign="top" >FMT Dithering</td> | ||
| 2774 | <td valign="top" >“dither”</td> | ||
| 2775 | <td valign="top" >ENUM</td> | ||
| 2776 | <td valign="top" >{ "off", "on" }</td> | ||
| 2777 | <td valign="top" >Connector</td> | ||
| 2778 | <td valign="top" >TBD</td> | ||
| 2779 | </tr> | ||
| 2780 | <tr> | ||
| 2781 | <td rowspan="3" valign="top" >rcar-du</td> | ||
| 2782 | <td rowspan="3" valign="top" >Generic</td> | ||
| 2783 | <td valign="top" >"alpha"</td> | ||
| 2784 | <td valign="top" >RANGE</td> | ||
| 2785 | <td valign="top" >Min=0, Max=255</td> | ||
| 2786 | <td valign="top" >Plane</td> | ||
| 2787 | <td valign="top" >TBD</td> | ||
| 2788 | </tr> | ||
| 2789 | <tr> | ||
| 2790 | <td valign="top" >"colorkey"</td> | ||
| 2791 | <td valign="top" >RANGE</td> | ||
| 2792 | <td valign="top" >Min=0, Max=0x01ffffff</td> | ||
| 2793 | <td valign="top" >Plane</td> | ||
| 2794 | <td valign="top" >TBD</td> | ||
| 2795 | </tr> | ||
| 2796 | <tr> | ||
| 2797 | <td valign="top" >"zpos"</td> | ||
| 2798 | <td valign="top" >RANGE</td> | ||
| 2799 | <td valign="top" >Min=1, Max=7</td> | ||
| 2800 | <td valign="top" >Plane</td> | ||
| 2801 | <td valign="top" >TBD</td> | ||
| 2802 | </tr> | ||
| 2803 | </tbody> | ||
| 2804 | </table> | ||
| 2805 | </sect2> | ||
| 2806 | </sect1> | ||
| 2807 | |||
| 2808 | <!-- Internals: vertical blanking --> | ||
| 2809 | |||
| 2810 | <sect1 id="drm-vertical-blank"> | ||
| 2811 | <title>Vertical Blanking</title> | ||
| 2812 | <para> | ||
| 2813 | Vertical blanking plays a major role in graphics rendering. To achieve | ||
| 2814 | tear-free display, users must synchronize page flips and/or rendering to | ||
| 2815 | vertical blanking. The DRM API offers ioctls to perform page flips | ||
| 2816 | synchronized to vertical blanking and wait for vertical blanking. | ||
| 2817 | </para> | ||
| 2818 | <para> | ||
| 2819 | The DRM core handles most of the vertical blanking management logic, which | ||
| 2820 | involves filtering out spurious interrupts, keeping race-free blanking | ||
| 2821 | counters, coping with counter wrap-around and resets and keeping use | ||
| 2822 | counts. It relies on the driver to generate vertical blanking interrupts | ||
| 2823 | and optionally provide a hardware vertical blanking counter. Drivers must | ||
| 2824 | implement the following operations. | ||
| 2825 | </para> | ||
| 2826 | <itemizedlist> | ||
| 2827 | <listitem> | ||
| 2828 | <synopsis>int (*enable_vblank) (struct drm_device *dev, int crtc); | ||
| 2829 | void (*disable_vblank) (struct drm_device *dev, int crtc);</synopsis> | ||
| 2830 | <para> | ||
| 2831 | Enable or disable vertical blanking interrupts for the given CRTC. | ||
| 2832 | </para> | ||
| 2833 | </listitem> | ||
| 2834 | <listitem> | ||
| 2835 | <synopsis>u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);</synopsis> | ||
| 2836 | <para> | ||
| 2837 | Retrieve the value of the vertical blanking counter for the given | ||
| 2838 | CRTC. If the hardware maintains a vertical blanking counter its value | ||
| 2839 | should be returned. Otherwise drivers can use the | ||
| 2840 | <function>drm_vblank_count</function> helper function to handle this | ||
| 2841 | operation. | ||
| 2842 | </para> | ||
| 2843 | </listitem> | ||
| 2844 | </itemizedlist> | ||
| 2845 | <para> | ||
| 2846 | Drivers must initialize the vertical blanking handling core with a call to | ||
| 2847 | <function>drm_vblank_init</function> in their | ||
| 2848 | <methodname>load</methodname> operation. The function will set the struct | ||
| 2849 | <structname>drm_device</structname> | ||
| 2850 | <structfield>vblank_disable_allowed</structfield> field to 0. This will | ||
| 2851 | keep vertical blanking interrupts enabled permanently until the first mode | ||
| 2852 | set operation, where <structfield>vblank_disable_allowed</structfield> is | ||
| 2853 | set to 1. The reason behind this is not clear. Drivers can set the field | ||
| 2854 | to 1 after <function>calling drm_vblank_init</function> to make vertical | ||
| 2855 | blanking interrupts dynamically managed from the beginning. | ||
| 2856 | </para> | ||
| 2857 | <para> | ||
| 2858 | Vertical blanking interrupts can be enabled by the DRM core or by drivers | ||
| 2859 | themselves (for instance to handle page flipping operations). The DRM core | ||
| 2860 | maintains a vertical blanking use count to ensure that the interrupts are | ||
| 2861 | not disabled while a user still needs them. To increment the use count, | ||
| 2862 | drivers call <function>drm_vblank_get</function>. Upon return vertical | ||
| 2863 | blanking interrupts are guaranteed to be enabled. | ||
| 2864 | </para> | ||
| 2865 | <para> | ||
| 2866 | To decrement the use count drivers call | ||
| 2867 | <function>drm_vblank_put</function>. Only when the use count drops to zero | ||
| 2868 | will the DRM core disable the vertical blanking interrupts after a delay | ||
| 2869 | by scheduling a timer. The delay is accessible through the vblankoffdelay | ||
| 2870 | module parameter or the <varname>drm_vblank_offdelay</varname> global | ||
| 2871 | variable and expressed in milliseconds. Its default value is 5000 ms. | ||
| 2872 | Zero means never disable, and a negative value means disable immediately. | ||
| 2873 | Drivers may override the behaviour by setting the | ||
| 2874 | <structname>drm_device</structname> | ||
| 2875 | <structfield>vblank_disable_immediate</structfield> flag, which when set | ||
| 2876 | causes vblank interrupts to be disabled immediately regardless of the | ||
| 2877 | drm_vblank_offdelay value. The flag should only be set if there's a | ||
| 2878 | properly working hardware vblank counter present. | ||
| 2879 | </para> | ||
| 2880 | <para> | ||
| 2881 | When a vertical blanking interrupt occurs drivers only need to call the | ||
| 2882 | <function>drm_handle_vblank</function> function to account for the | ||
| 2883 | interrupt. | ||
| 2884 | </para> | ||
| 2885 | <para> | ||
| 2886 | Resources allocated by <function>drm_vblank_init</function> must be freed | ||
| 2887 | with a call to <function>drm_vblank_cleanup</function> in the driver | ||
| 2888 | <methodname>unload</methodname> operation handler. | ||
| 2889 | </para> | ||
| 2890 | <sect2> | ||
| 2891 | <title>Vertical Blanking and Interrupt Handling Functions Reference</title> | ||
| 2892 | !Edrivers/gpu/drm/drm_irq.c | ||
| 2893 | !Finclude/drm/drmP.h drm_crtc_vblank_waitqueue | ||
| 2894 | </sect2> | ||
| 2895 | </sect1> | ||
| 2896 | |||
| 2897 | <!-- Internals: open/close, file operations and ioctls --> | ||
| 2898 | |||
| 2899 | <sect1> | ||
| 2900 | <title>Open/Close, File Operations and IOCTLs</title> | ||
| 2901 | <sect2> | ||
| 2902 | <title>Open and Close</title> | ||
| 2903 | <synopsis>int (*firstopen) (struct drm_device *); | ||
| 2904 | void (*lastclose) (struct drm_device *); | ||
| 2905 | int (*open) (struct drm_device *, struct drm_file *); | ||
| 2906 | void (*preclose) (struct drm_device *, struct drm_file *); | ||
| 2907 | void (*postclose) (struct drm_device *, struct drm_file *);</synopsis> | ||
| 2908 | <abstract>Open and close handlers. None of those methods are mandatory. | ||
| 2909 | </abstract> | ||
| 2910 | <para> | ||
| 2911 | The <methodname>firstopen</methodname> method is called by the DRM core | ||
| 2912 | for legacy UMS (User Mode Setting) drivers only when an application | ||
| 2913 | opens a device that has no other opened file handle. UMS drivers can | ||
| 2914 | implement it to acquire device resources. KMS drivers can't use the | ||
| 2915 | method and must acquire resources in the <methodname>load</methodname> | ||
| 2916 | method instead. | ||
| 2917 | </para> | ||
| 2918 | <para> | ||
| 2919 | Similarly the <methodname>lastclose</methodname> method is called when | ||
| 2920 | the last application holding a file handle opened on the device closes | ||
| 2921 | it, for both UMS and KMS drivers. Additionally, the method is also | ||
| 2922 | called at module unload time or, for hot-pluggable devices, when the | ||
| 2923 | device is unplugged. The <methodname>firstopen</methodname> and | ||
| 2924 | <methodname>lastclose</methodname> calls can thus be unbalanced. | ||
| 2925 | </para> | ||
| 2926 | <para> | ||
| 2927 | The <methodname>open</methodname> method is called every time the device | ||
| 2928 | is opened by an application. Drivers can allocate per-file private data | ||
| 2929 | in this method and store them in the struct | ||
| 2930 | <structname>drm_file</structname> <structfield>driver_priv</structfield> | ||
| 2931 | field. Note that the <methodname>open</methodname> method is called | ||
| 2932 | before <methodname>firstopen</methodname>. | ||
| 2933 | </para> | ||
| 2934 | <para> | ||
| 2935 | The close operation is split into <methodname>preclose</methodname> and | ||
| 2936 | <methodname>postclose</methodname> methods. Drivers must stop and | ||
| 2937 | cleanup all per-file operations in the <methodname>preclose</methodname> | ||
| 2938 | method. For instance pending vertical blanking and page flip events must | ||
| 2939 | be cancelled. No per-file operation is allowed on the file handle after | ||
| 2940 | returning from the <methodname>preclose</methodname> method. | ||
| 2941 | </para> | ||
| 2942 | <para> | ||
| 2943 | Finally the <methodname>postclose</methodname> method is called as the | ||
| 2944 | last step of the close operation, right before calling the | ||
| 2945 | <methodname>lastclose</methodname> method if no other open file handle | ||
| 2946 | exists for the device. Drivers that have allocated per-file private data | ||
| 2947 | in the <methodname>open</methodname> method should free it here. | ||
| 2948 | </para> | ||
| 2949 | <para> | ||
| 2950 | The <methodname>lastclose</methodname> method should restore CRTC and | ||
| 2951 | plane properties to default value, so that a subsequent open of the | ||
| 2952 | device will not inherit state from the previous user. It can also be | ||
| 2953 | used to execute delayed power switching state changes, e.g. in | ||
| 2954 | conjunction with the vga_switcheroo infrastructure (see | ||
| 2955 | <xref linkend="vga_switcheroo"/>). Beyond that KMS drivers should not | ||
| 2956 | do any further cleanup. Only legacy UMS drivers might need to clean up | ||
| 2957 | device state so that the vga console or an independent fbdev driver | ||
| 2958 | could take over. | ||
| 2959 | </para> | ||
| 2960 | </sect2> | ||
| 2961 | <sect2> | ||
| 2962 | <title>File Operations</title> | ||
| 2963 | !Pdrivers/gpu/drm/drm_fops.c file operations | ||
| 2964 | !Edrivers/gpu/drm/drm_fops.c | ||
| 2965 | </sect2> | ||
| 2966 | <sect2> | ||
| 2967 | <title>IOCTLs</title> | ||
| 2968 | <synopsis>struct drm_ioctl_desc *ioctls; | ||
| 2969 | int num_ioctls;</synopsis> | ||
| 2970 | <abstract>Driver-specific ioctls descriptors table.</abstract> | ||
| 2971 | <para> | ||
| 2972 | Driver-specific ioctls numbers start at DRM_COMMAND_BASE. The ioctls | ||
| 2973 | descriptors table is indexed by the ioctl number offset from the base | ||
| 2974 | value. Drivers can use the DRM_IOCTL_DEF_DRV() macro to initialize the | ||
| 2975 | table entries. | ||
| 2976 | </para> | ||
| 2977 | <para> | ||
| 2978 | <programlisting>DRM_IOCTL_DEF_DRV(ioctl, func, flags)</programlisting> | ||
| 2979 | <para> | ||
| 2980 | <parameter>ioctl</parameter> is the ioctl name. Drivers must define | ||
| 2981 | the DRM_##ioctl and DRM_IOCTL_##ioctl macros to the ioctl number | ||
| 2982 | offset from DRM_COMMAND_BASE and the ioctl number respectively. The | ||
| 2983 | first macro is private to the device while the second must be exposed | ||
| 2984 | to userspace in a public header. | ||
| 2985 | </para> | ||
| 2986 | <para> | ||
| 2987 | <parameter>func</parameter> is a pointer to the ioctl handler function | ||
| 2988 | compatible with the <type>drm_ioctl_t</type> type. | ||
| 2989 | <programlisting>typedef int drm_ioctl_t(struct drm_device *dev, void *data, | ||
| 2990 | struct drm_file *file_priv);</programlisting> | ||
| 2991 | </para> | ||
| 2992 | <para> | ||
| 2993 | <parameter>flags</parameter> is a bitmask combination of the following | ||
| 2994 | values. It restricts how the ioctl is allowed to be called. | ||
| 2995 | <itemizedlist> | ||
| 2996 | <listitem><para> | ||
| 2997 | DRM_AUTH - Only authenticated callers allowed | ||
| 2998 | </para></listitem> | ||
| 2999 | <listitem><para> | ||
| 3000 | DRM_MASTER - The ioctl can only be called on the master file | ||
| 3001 | handle | ||
| 3002 | </para></listitem> | ||
| 3003 | <listitem><para> | ||
| 3004 | DRM_ROOT_ONLY - Only callers with the SYSADMIN capability allowed | ||
| 3005 | </para></listitem> | ||
| 3006 | <listitem><para> | ||
| 3007 | DRM_CONTROL_ALLOW - The ioctl can only be called on a control | ||
| 3008 | device | ||
| 3009 | </para></listitem> | ||
| 3010 | <listitem><para> | ||
| 3011 | DRM_UNLOCKED - The ioctl handler will be called without locking | ||
| 3012 | the DRM global mutex. This is the enforced default for kms drivers | ||
| 3013 | (i.e. using the DRIVER_MODESET flag) and hence shouldn't be used | ||
| 3014 | any more for new drivers. | ||
| 3015 | </para></listitem> | ||
| 3016 | </itemizedlist> | ||
| 3017 | </para> | ||
| 3018 | </para> | ||
| 3019 | !Edrivers/gpu/drm/drm_ioctl.c | ||
| 3020 | </sect2> | ||
| 3021 | </sect1> | ||
| 3022 | <sect1> | ||
| 3023 | <title>Legacy Support Code</title> | ||
| 3024 | <para> | ||
| 3025 | The section very briefly covers some of the old legacy support code which | ||
| 3026 | is only used by old DRM drivers which have done a so-called shadow-attach | ||
| 3027 | to the underlying device instead of registering as a real driver. This | ||
| 3028 | also includes some of the old generic buffer management and command | ||
| 3029 | submission code. Do not use any of this in new and modern drivers. | ||
| 3030 | </para> | ||
| 3031 | |||
| 3032 | <sect2> | ||
| 3033 | <title>Legacy Suspend/Resume</title> | ||
| 3034 | <para> | ||
| 3035 | The DRM core provides some suspend/resume code, but drivers wanting full | ||
| 3036 | suspend/resume support should provide save() and restore() functions. | ||
| 3037 | These are called at suspend, hibernate, or resume time, and should perform | ||
| 3038 | any state save or restore required by your device across suspend or | ||
| 3039 | hibernate states. | ||
| 3040 | </para> | ||
| 3041 | <synopsis>int (*suspend) (struct drm_device *, pm_message_t state); | ||
| 3042 | int (*resume) (struct drm_device *);</synopsis> | ||
| 3043 | <para> | ||
| 3044 | Those are legacy suspend and resume methods which | ||
| 3045 | <emphasis>only</emphasis> work with the legacy shadow-attach driver | ||
| 3046 | registration functions. New driver should use the power management | ||
| 3047 | interface provided by their bus type (usually through | ||
| 3048 | the struct <structname>device_driver</structname> dev_pm_ops) and set | ||
| 3049 | these methods to NULL. | ||
| 3050 | </para> | ||
| 3051 | </sect2> | ||
| 3052 | |||
| 3053 | <sect2> | ||
| 3054 | <title>Legacy DMA Services</title> | ||
| 3055 | <para> | ||
| 3056 | This should cover how DMA mapping etc. is supported by the core. | ||
| 3057 | These functions are deprecated and should not be used. | ||
| 3058 | </para> | ||
| 3059 | </sect2> | ||
| 3060 | </sect1> | ||
| 3061 | </chapter> | ||
| 3062 | |||
| 3063 | <!-- TODO | ||
| 3064 | |||
| 3065 | - Add a glossary | ||
| 3066 | - Document the struct_mutex catch-all lock | ||
| 3067 | - Document connector properties | ||
| 3068 | |||
| 3069 | - Why is the load method optional? | ||
| 3070 | - What are drivers supposed to set the initial display state to, and how? | ||
| 3071 | Connector's DPMS states are not initialized and are thus equal to | ||
| 3072 | DRM_MODE_DPMS_ON. The fbcon compatibility layer calls | ||
| 3073 | drm_helper_disable_unused_functions(), which disables unused encoders and | ||
| 3074 | CRTCs, but doesn't touch the connectors' DPMS state, and | ||
| 3075 | drm_helper_connector_dpms() in reaction to fbdev blanking events. Do drivers | ||
| 3076 | that don't implement (or just don't use) fbcon compatibility need to call | ||
| 3077 | those functions themselves? | ||
| 3078 | - KMS drivers must call drm_vblank_pre_modeset() and drm_vblank_post_modeset() | ||
| 3079 | around mode setting. Should this be done in the DRM core? | ||
| 3080 | - vblank_disable_allowed is set to 1 in the first drm_vblank_post_modeset() | ||
| 3081 | call and never set back to 0. It seems to be safe to permanently set it to 1 | ||
| 3082 | in drm_vblank_init() for KMS driver, and it might be safe for UMS drivers as | ||
| 3083 | well. This should be investigated. | ||
| 3084 | - crtc and connector .save and .restore operations are only used internally in | ||
| 3085 | drivers, should they be removed from the core? | ||
| 3086 | - encoder mid-layer .save and .restore operations are only used internally in | ||
| 3087 | drivers, should they be removed from the core? | ||
| 3088 | - encoder mid-layer .detect operation is only used internally in drivers, | ||
| 3089 | should it be removed from the core? | ||
| 3090 | --> | ||
| 3091 | |||
| 3092 | <!-- External interfaces --> | ||
| 3093 | |||
| 3094 | <chapter id="drmExternals"> | ||
| 3095 | <title>Userland interfaces</title> | ||
| 3096 | <para> | ||
| 3097 | The DRM core exports several interfaces to applications, | ||
| 3098 | generally intended to be used through corresponding libdrm | ||
| 3099 | wrapper functions. In addition, drivers export device-specific | ||
| 3100 | interfaces for use by userspace drivers & device-aware | ||
| 3101 | applications through ioctls and sysfs files. | ||
| 3102 | </para> | ||
| 3103 | <para> | ||
| 3104 | External interfaces include: memory mapping, context management, | ||
| 3105 | DMA operations, AGP management, vblank control, fence | ||
| 3106 | management, memory management, and output management. | ||
| 3107 | </para> | ||
| 3108 | <para> | ||
| 3109 | Cover generic ioctls and sysfs layout here. We only need high-level | ||
| 3110 | info, since man pages should cover the rest. | ||
| 3111 | </para> | ||
| 3112 | |||
| 3113 | <!-- External: render nodes --> | ||
| 3114 | |||
| 3115 | <sect1> | ||
| 3116 | <title>Render nodes</title> | ||
| 3117 | <para> | ||
| 3118 | DRM core provides multiple character-devices for user-space to use. | ||
| 3119 | Depending on which device is opened, user-space can perform a different | ||
| 3120 | set of operations (mainly ioctls). The primary node is always created | ||
| 3121 | and called card<num>. Additionally, a currently | ||
| 3122 | unused control node, called controlD<num> is also | ||
| 3123 | created. The primary node provides all legacy operations and | ||
| 3124 | historically was the only interface used by userspace. With KMS, the | ||
| 3125 | control node was introduced. However, the planned KMS control interface | ||
| 3126 | has never been written and so the control node stays unused to date. | ||
| 3127 | </para> | ||
| 3128 | <para> | ||
| 3129 | With the increased use of offscreen renderers and GPGPU applications, | ||
| 3130 | clients no longer require running compositors or graphics servers to | ||
| 3131 | make use of a GPU. But the DRM API required unprivileged clients to | ||
| 3132 | authenticate to a DRM-Master prior to getting GPU access. To avoid this | ||
| 3133 | step and to grant clients GPU access without authenticating, render | ||
| 3134 | nodes were introduced. Render nodes solely serve render clients, that | ||
| 3135 | is, no modesetting or privileged ioctls can be issued on render nodes. | ||
| 3136 | Only non-global rendering commands are allowed. If a driver supports | ||
| 3137 | render nodes, it must advertise it via the DRIVER_RENDER | ||
| 3138 | DRM driver capability. If not supported, the primary node must be used | ||
| 3139 | for render clients together with the legacy drmAuth authentication | ||
| 3140 | procedure. | ||
| 3141 | </para> | ||
| 3142 | <para> | ||
| 3143 | If a driver advertises render node support, DRM core will create a | ||
| 3144 | separate render node called renderD<num>. There will | ||
| 3145 | be one render node per device. No ioctls except PRIME-related ioctls | ||
| 3146 | will be allowed on this node. Especially GEM_OPEN will be | ||
| 3147 | explicitly prohibited. Render nodes are designed to avoid the | ||
| 3148 | buffer-leaks, which occur if clients guess the flink names or mmap | ||
| 3149 | offsets on the legacy interface. Additionally to this basic interface, | ||
| 3150 | drivers must mark their driver-dependent render-only ioctls as | ||
| 3151 | DRM_RENDER_ALLOW so render clients can use them. Driver | ||
| 3152 | authors must be careful not to allow any privileged ioctls on render | ||
| 3153 | nodes. | ||
| 3154 | </para> | ||
| 3155 | <para> | ||
| 3156 | With render nodes, user-space can now control access to the render node | ||
| 3157 | via basic file-system access-modes. A running graphics server which | ||
| 3158 | authenticates clients on the privileged primary/legacy node is no longer | ||
| 3159 | required. Instead, a client can open the render node and is immediately | ||
| 3160 | granted GPU access. Communication between clients (or servers) is done | ||
| 3161 | via PRIME. FLINK from render node to legacy node is not supported. New | ||
| 3162 | clients must not use the insecure FLINK interface. | ||
| 3163 | </para> | ||
| 3164 | <para> | ||
| 3165 | Besides dropping all modeset/global ioctls, render nodes also drop the | ||
| 3166 | DRM-Master concept. There is no reason to associate render clients with | ||
| 3167 | a DRM-Master as they are independent of any graphics server. Besides, | ||
| 3168 | they must work without any running master, anyway. | ||
| 3169 | Drivers must be able to run without a master object if they support | ||
| 3170 | render nodes. If, on the other hand, a driver requires shared state | ||
| 3171 | between clients which is visible to user-space and accessible beyond | ||
| 3172 | open-file boundaries, they cannot support render nodes. | ||
| 3173 | </para> | ||
| 3174 | </sect1> | ||
| 3175 | |||
| 3176 | <!-- External: vblank handling --> | ||
| 3177 | |||
| 3178 | <sect1> | ||
| 3179 | <title>VBlank event handling</title> | ||
| 3180 | <para> | ||
| 3181 | The DRM core exposes two vertical blank related ioctls: | ||
| 3182 | <variablelist> | ||
| 3183 | <varlistentry> | ||
| 3184 | <term>DRM_IOCTL_WAIT_VBLANK</term> | ||
| 3185 | <listitem> | ||
| 3186 | <para> | ||
| 3187 | This takes a struct drm_wait_vblank structure as its argument, | ||
| 3188 | and it is used to block or request a signal when a specified | ||
| 3189 | vblank event occurs. | ||
| 3190 | </para> | ||
| 3191 | </listitem> | ||
| 3192 | </varlistentry> | ||
| 3193 | <varlistentry> | ||
| 3194 | <term>DRM_IOCTL_MODESET_CTL</term> | ||
| 3195 | <listitem> | ||
| 3196 | <para> | ||
| 3197 | This was only used for user-mode-settind drivers around | ||
| 3198 | modesetting changes to allow the kernel to update the vblank | ||
| 3199 | interrupt after mode setting, since on many devices the vertical | ||
| 3200 | blank counter is reset to 0 at some point during modeset. Modern | ||
| 3201 | drivers should not call this any more since with kernel mode | ||
| 3202 | setting it is a no-op. | ||
| 3203 | </para> | ||
| 3204 | </listitem> | ||
| 3205 | </varlistentry> | ||
| 3206 | </variablelist> | ||
| 3207 | </para> | ||
| 3208 | </sect1> | ||
| 3209 | |||
| 3210 | </chapter> | ||
| 3211 | </part> | ||
| 3212 | <part id="drmDrivers"> | ||
| 3213 | <title>DRM Drivers</title> | ||
| 3214 | |||
| 3215 | <partintro> | ||
| 3216 | <para> | ||
| 3217 | This second part of the GPU Driver Developer's Guide documents driver | ||
| 3218 | code, implementation details and also all the driver-specific userspace | ||
| 3219 | interfaces. Especially since all hardware-acceleration interfaces to | ||
| 3220 | userspace are driver specific for efficiency and other reasons these | ||
| 3221 | interfaces can be rather substantial. Hence every driver has its own | ||
| 3222 | chapter. | ||
| 3223 | </para> | ||
| 3224 | </partintro> | ||
| 3225 | |||
| 3226 | <chapter id="drmI915"> | ||
| 3227 | <title>drm/i915 Intel GFX Driver</title> | ||
| 3228 | <para> | ||
| 3229 | The drm/i915 driver supports all (with the exception of some very early | ||
| 3230 | models) integrated GFX chipsets with both Intel display and rendering | ||
| 3231 | blocks. This excludes a set of SoC platforms with an SGX rendering unit, | ||
| 3232 | those have basic support through the gma500 drm driver. | ||
| 3233 | </para> | ||
| 3234 | <sect1> | ||
| 3235 | <title>Core Driver Infrastructure</title> | ||
| 3236 | <para> | ||
| 3237 | This section covers core driver infrastructure used by both the display | ||
| 3238 | and the GEM parts of the driver. | ||
| 3239 | </para> | ||
| 3240 | <sect2> | ||
| 3241 | <title>Runtime Power Management</title> | ||
| 3242 | !Pdrivers/gpu/drm/i915/intel_runtime_pm.c runtime pm | ||
| 3243 | !Idrivers/gpu/drm/i915/intel_runtime_pm.c | ||
| 3244 | !Idrivers/gpu/drm/i915/intel_uncore.c | ||
| 3245 | </sect2> | ||
| 3246 | <sect2> | ||
| 3247 | <title>Interrupt Handling</title> | ||
| 3248 | !Pdrivers/gpu/drm/i915/i915_irq.c interrupt handling | ||
| 3249 | !Fdrivers/gpu/drm/i915/i915_irq.c intel_irq_init intel_irq_init_hw intel_hpd_init | ||
| 3250 | !Fdrivers/gpu/drm/i915/i915_irq.c intel_runtime_pm_disable_interrupts | ||
| 3251 | !Fdrivers/gpu/drm/i915/i915_irq.c intel_runtime_pm_enable_interrupts | ||
| 3252 | </sect2> | ||
| 3253 | <sect2> | ||
| 3254 | <title>Intel GVT-g Guest Support(vGPU)</title> | ||
| 3255 | !Pdrivers/gpu/drm/i915/i915_vgpu.c Intel GVT-g guest support | ||
| 3256 | !Idrivers/gpu/drm/i915/i915_vgpu.c | ||
| 3257 | </sect2> | ||
| 3258 | </sect1> | ||
| 3259 | <sect1> | ||
| 3260 | <title>Display Hardware Handling</title> | ||
| 3261 | <para> | ||
| 3262 | This section covers everything related to the display hardware including | ||
| 3263 | the mode setting infrastructure, plane, sprite and cursor handling and | ||
| 3264 | display, output probing and related topics. | ||
| 3265 | </para> | ||
| 3266 | <sect2> | ||
| 3267 | <title>Mode Setting Infrastructure</title> | ||
| 3268 | <para> | ||
| 3269 | The i915 driver is thus far the only DRM driver which doesn't use the | ||
| 3270 | common DRM helper code to implement mode setting sequences. Thus it | ||
| 3271 | has its own tailor-made infrastructure for executing a display | ||
| 3272 | configuration change. | ||
| 3273 | </para> | ||
| 3274 | </sect2> | ||
| 3275 | <sect2> | ||
| 3276 | <title>Frontbuffer Tracking</title> | ||
| 3277 | !Pdrivers/gpu/drm/i915/intel_frontbuffer.c frontbuffer tracking | ||
| 3278 | !Idrivers/gpu/drm/i915/intel_frontbuffer.c | ||
| 3279 | !Fdrivers/gpu/drm/i915/i915_gem.c i915_gem_track_fb | ||
| 3280 | </sect2> | ||
| 3281 | <sect2> | ||
| 3282 | <title>Display FIFO Underrun Reporting</title> | ||
| 3283 | !Pdrivers/gpu/drm/i915/intel_fifo_underrun.c fifo underrun handling | ||
| 3284 | !Idrivers/gpu/drm/i915/intel_fifo_underrun.c | ||
| 3285 | </sect2> | ||
| 3286 | <sect2> | ||
| 3287 | <title>Plane Configuration</title> | ||
| 3288 | <para> | ||
| 3289 | This section covers plane configuration and composition with the | ||
| 3290 | primary plane, sprites, cursors and overlays. This includes the | ||
| 3291 | infrastructure to do atomic vsync'ed updates of all this state and | ||
| 3292 | also tightly coupled topics like watermark setup and computation, | ||
| 3293 | framebuffer compression and panel self refresh. | ||
| 3294 | </para> | ||
| 3295 | </sect2> | ||
| 3296 | <sect2> | ||
| 3297 | <title>Atomic Plane Helpers</title> | ||
| 3298 | !Pdrivers/gpu/drm/i915/intel_atomic_plane.c atomic plane helpers | ||
| 3299 | !Idrivers/gpu/drm/i915/intel_atomic_plane.c | ||
| 3300 | </sect2> | ||
| 3301 | <sect2> | ||
| 3302 | <title>Output Probing</title> | ||
| 3303 | <para> | ||
| 3304 | This section covers output probing and related infrastructure like the | ||
| 3305 | hotplug interrupt storm detection and mitigation code. Note that the | ||
| 3306 | i915 driver still uses most of the common DRM helper code for output | ||
| 3307 | probing, so those sections fully apply. | ||
| 3308 | </para> | ||
| 3309 | </sect2> | ||
| 3310 | <sect2> | ||
| 3311 | <title>Hotplug</title> | ||
| 3312 | !Pdrivers/gpu/drm/i915/intel_hotplug.c Hotplug | ||
| 3313 | !Idrivers/gpu/drm/i915/intel_hotplug.c | ||
| 3314 | </sect2> | ||
| 3315 | <sect2> | ||
| 3316 | <title>High Definition Audio</title> | ||
| 3317 | !Pdrivers/gpu/drm/i915/intel_audio.c High Definition Audio over HDMI and Display Port | ||
| 3318 | !Idrivers/gpu/drm/i915/intel_audio.c | ||
| 3319 | !Iinclude/drm/i915_component.h | ||
| 3320 | </sect2> | ||
| 3321 | <sect2> | ||
| 3322 | <title>Panel Self Refresh PSR (PSR/SRD)</title> | ||
| 3323 | !Pdrivers/gpu/drm/i915/intel_psr.c Panel Self Refresh (PSR/SRD) | ||
| 3324 | !Idrivers/gpu/drm/i915/intel_psr.c | ||
| 3325 | </sect2> | ||
| 3326 | <sect2> | ||
| 3327 | <title>Frame Buffer Compression (FBC)</title> | ||
| 3328 | !Pdrivers/gpu/drm/i915/intel_fbc.c Frame Buffer Compression (FBC) | ||
| 3329 | !Idrivers/gpu/drm/i915/intel_fbc.c | ||
| 3330 | </sect2> | ||
| 3331 | <sect2> | ||
| 3332 | <title>Display Refresh Rate Switching (DRRS)</title> | ||
| 3333 | !Pdrivers/gpu/drm/i915/intel_dp.c Display Refresh Rate Switching (DRRS) | ||
| 3334 | !Fdrivers/gpu/drm/i915/intel_dp.c intel_dp_set_drrs_state | ||
| 3335 | !Fdrivers/gpu/drm/i915/intel_dp.c intel_edp_drrs_enable | ||
| 3336 | !Fdrivers/gpu/drm/i915/intel_dp.c intel_edp_drrs_disable | ||
| 3337 | !Fdrivers/gpu/drm/i915/intel_dp.c intel_edp_drrs_invalidate | ||
| 3338 | !Fdrivers/gpu/drm/i915/intel_dp.c intel_edp_drrs_flush | ||
| 3339 | !Fdrivers/gpu/drm/i915/intel_dp.c intel_dp_drrs_init | ||
| 3340 | |||
| 3341 | </sect2> | ||
| 3342 | <sect2> | ||
| 3343 | <title>DPIO</title> | ||
| 3344 | !Pdrivers/gpu/drm/i915/i915_reg.h DPIO | ||
| 3345 | </sect2> | ||
| 3346 | |||
| 3347 | <sect2> | ||
| 3348 | <title>CSR firmware support for DMC</title> | ||
| 3349 | !Pdrivers/gpu/drm/i915/intel_csr.c csr support for dmc | ||
| 3350 | !Idrivers/gpu/drm/i915/intel_csr.c | ||
| 3351 | </sect2> | ||
| 3352 | <sect2> | ||
| 3353 | <title>Video BIOS Table (VBT)</title> | ||
| 3354 | !Pdrivers/gpu/drm/i915/intel_bios.c Video BIOS Table (VBT) | ||
| 3355 | !Idrivers/gpu/drm/i915/intel_bios.c | ||
| 3356 | !Idrivers/gpu/drm/i915/intel_vbt_defs.h | ||
| 3357 | </sect2> | ||
| 3358 | </sect1> | ||
| 3359 | |||
| 3360 | <sect1> | ||
| 3361 | <title>Memory Management and Command Submission</title> | ||
| 3362 | <para> | ||
| 3363 | This sections covers all things related to the GEM implementation in the | ||
| 3364 | i915 driver. | ||
| 3365 | </para> | ||
| 3366 | <sect2> | ||
| 3367 | <title>Batchbuffer Parsing</title> | ||
| 3368 | !Pdrivers/gpu/drm/i915/i915_cmd_parser.c batch buffer command parser | ||
| 3369 | !Idrivers/gpu/drm/i915/i915_cmd_parser.c | ||
| 3370 | </sect2> | ||
| 3371 | <sect2> | ||
| 3372 | <title>Batchbuffer Pools</title> | ||
| 3373 | !Pdrivers/gpu/drm/i915/i915_gem_batch_pool.c batch pool | ||
| 3374 | !Idrivers/gpu/drm/i915/i915_gem_batch_pool.c | ||
| 3375 | </sect2> | ||
| 3376 | <sect2> | ||
| 3377 | <title>Logical Rings, Logical Ring Contexts and Execlists</title> | ||
| 3378 | !Pdrivers/gpu/drm/i915/intel_lrc.c Logical Rings, Logical Ring Contexts and Execlists | ||
| 3379 | !Idrivers/gpu/drm/i915/intel_lrc.c | ||
| 3380 | </sect2> | ||
| 3381 | <sect2> | ||
| 3382 | <title>Global GTT views</title> | ||
| 3383 | !Pdrivers/gpu/drm/i915/i915_gem_gtt.c Global GTT views | ||
| 3384 | !Idrivers/gpu/drm/i915/i915_gem_gtt.c | ||
| 3385 | </sect2> | ||
| 3386 | <sect2> | ||
| 3387 | <title>GTT Fences and Swizzling</title> | ||
| 3388 | !Idrivers/gpu/drm/i915/i915_gem_fence.c | ||
| 3389 | <sect3> | ||
| 3390 | <title>Global GTT Fence Handling</title> | ||
| 3391 | !Pdrivers/gpu/drm/i915/i915_gem_fence.c fence register handling | ||
| 3392 | </sect3> | ||
| 3393 | <sect3> | ||
| 3394 | <title>Hardware Tiling and Swizzling Details</title> | ||
| 3395 | !Pdrivers/gpu/drm/i915/i915_gem_fence.c tiling swizzling details | ||
| 3396 | </sect3> | ||
| 3397 | </sect2> | ||
| 3398 | <sect2> | ||
| 3399 | <title>Object Tiling IOCTLs</title> | ||
| 3400 | !Idrivers/gpu/drm/i915/i915_gem_tiling.c | ||
| 3401 | !Pdrivers/gpu/drm/i915/i915_gem_tiling.c buffer object tiling | ||
| 3402 | </sect2> | ||
| 3403 | <sect2> | ||
| 3404 | <title>Buffer Object Eviction</title> | ||
| 3405 | <para> | ||
| 3406 | This section documents the interface functions for evicting buffer | ||
| 3407 | objects to make space available in the virtual gpu address spaces. | ||
| 3408 | Note that this is mostly orthogonal to shrinking buffer objects | ||
| 3409 | caches, which has the goal to make main memory (shared with the gpu | ||
| 3410 | through the unified memory architecture) available. | ||
| 3411 | </para> | ||
| 3412 | !Idrivers/gpu/drm/i915/i915_gem_evict.c | ||
| 3413 | </sect2> | ||
| 3414 | <sect2> | ||
| 3415 | <title>Buffer Object Memory Shrinking</title> | ||
| 3416 | <para> | ||
| 3417 | This section documents the interface function for shrinking memory | ||
| 3418 | usage of buffer object caches. Shrinking is used to make main memory | ||
| 3419 | available. Note that this is mostly orthogonal to evicting buffer | ||
| 3420 | objects, which has the goal to make space in gpu virtual address | ||
| 3421 | spaces. | ||
| 3422 | </para> | ||
| 3423 | !Idrivers/gpu/drm/i915/i915_gem_shrinker.c | ||
| 3424 | </sect2> | ||
| 3425 | </sect1> | ||
| 3426 | <sect1> | ||
| 3427 | <title>GuC</title> | ||
| 3428 | <sect2> | ||
| 3429 | <title>GuC-specific firmware loader</title> | ||
| 3430 | !Pdrivers/gpu/drm/i915/intel_guc_loader.c GuC-specific firmware loader | ||
| 3431 | !Idrivers/gpu/drm/i915/intel_guc_loader.c | ||
| 3432 | </sect2> | ||
| 3433 | <sect2> | ||
| 3434 | <title>GuC-based command submission</title> | ||
| 3435 | !Pdrivers/gpu/drm/i915/i915_guc_submission.c GuC-based command submission | ||
| 3436 | !Idrivers/gpu/drm/i915/i915_guc_submission.c | ||
| 3437 | </sect2> | ||
| 3438 | <sect2> | ||
| 3439 | <title>GuC Firmware Layout</title> | ||
| 3440 | !Pdrivers/gpu/drm/i915/intel_guc_fwif.h GuC Firmware Layout | ||
| 3441 | </sect2> | ||
| 3442 | </sect1> | ||
| 3443 | |||
| 3444 | <sect1> | ||
| 3445 | <title> Tracing </title> | ||
| 3446 | <para> | ||
| 3447 | This sections covers all things related to the tracepoints implemented in | ||
| 3448 | the i915 driver. | ||
| 3449 | </para> | ||
| 3450 | <sect2> | ||
| 3451 | <title> i915_ppgtt_create and i915_ppgtt_release </title> | ||
| 3452 | !Pdrivers/gpu/drm/i915/i915_trace.h i915_ppgtt_create and i915_ppgtt_release tracepoints | ||
| 3453 | </sect2> | ||
| 3454 | <sect2> | ||
| 3455 | <title> i915_context_create and i915_context_free </title> | ||
| 3456 | !Pdrivers/gpu/drm/i915/i915_trace.h i915_context_create and i915_context_free tracepoints | ||
| 3457 | </sect2> | ||
| 3458 | <sect2> | ||
| 3459 | <title> switch_mm </title> | ||
| 3460 | !Pdrivers/gpu/drm/i915/i915_trace.h switch_mm tracepoint | ||
| 3461 | </sect2> | ||
| 3462 | </sect1> | ||
| 3463 | |||
| 3464 | </chapter> | ||
| 3465 | !Cdrivers/gpu/drm/i915/i915_irq.c | ||
| 3466 | </part> | ||
| 3467 | |||
| 3468 | <part id="vga_switcheroo"> | ||
| 3469 | <title>vga_switcheroo</title> | ||
| 3470 | <partintro> | ||
| 3471 | !Pdrivers/gpu/vga/vga_switcheroo.c Overview | ||
| 3472 | </partintro> | ||
| 3473 | |||
| 3474 | <chapter id="modes_of_use"> | ||
| 3475 | <title>Modes of Use</title> | ||
| 3476 | <sect1> | ||
| 3477 | <title>Manual switching and manual power control</title> | ||
| 3478 | !Pdrivers/gpu/vga/vga_switcheroo.c Manual switching and manual power control | ||
| 3479 | </sect1> | ||
| 3480 | <sect1> | ||
| 3481 | <title>Driver power control</title> | ||
| 3482 | !Pdrivers/gpu/vga/vga_switcheroo.c Driver power control | ||
| 3483 | </sect1> | ||
| 3484 | </chapter> | ||
| 3485 | |||
| 3486 | <chapter id="api"> | ||
| 3487 | <title>API</title> | ||
| 3488 | <sect1> | ||
| 3489 | <title>Public functions</title> | ||
| 3490 | !Edrivers/gpu/vga/vga_switcheroo.c | ||
| 3491 | </sect1> | ||
| 3492 | <sect1> | ||
| 3493 | <title>Public structures</title> | ||
| 3494 | !Finclude/linux/vga_switcheroo.h vga_switcheroo_handler | ||
| 3495 | !Finclude/linux/vga_switcheroo.h vga_switcheroo_client_ops | ||
| 3496 | </sect1> | ||
| 3497 | <sect1> | ||
| 3498 | <title>Public constants</title> | ||
| 3499 | !Finclude/linux/vga_switcheroo.h vga_switcheroo_handler_flags_t | ||
| 3500 | !Finclude/linux/vga_switcheroo.h vga_switcheroo_client_id | ||
| 3501 | !Finclude/linux/vga_switcheroo.h vga_switcheroo_state | ||
| 3502 | </sect1> | ||
| 3503 | <sect1> | ||
| 3504 | <title>Private structures</title> | ||
| 3505 | !Fdrivers/gpu/vga/vga_switcheroo.c vgasr_priv | ||
| 3506 | !Fdrivers/gpu/vga/vga_switcheroo.c vga_switcheroo_client | ||
| 3507 | </sect1> | ||
| 3508 | </chapter> | ||
| 3509 | |||
| 3510 | <chapter id="handlers"> | ||
| 3511 | <title>Handlers</title> | ||
| 3512 | <sect1> | ||
| 3513 | <title>apple-gmux Handler</title> | ||
| 3514 | !Pdrivers/platform/x86/apple-gmux.c Overview | ||
| 3515 | !Pdrivers/platform/x86/apple-gmux.c Interrupt | ||
| 3516 | <sect2> | ||
| 3517 | <title>Graphics mux</title> | ||
| 3518 | !Pdrivers/platform/x86/apple-gmux.c Graphics mux | ||
| 3519 | </sect2> | ||
| 3520 | <sect2> | ||
| 3521 | <title>Power control</title> | ||
| 3522 | !Pdrivers/platform/x86/apple-gmux.c Power control | ||
| 3523 | </sect2> | ||
| 3524 | <sect2> | ||
| 3525 | <title>Backlight control</title> | ||
| 3526 | !Pdrivers/platform/x86/apple-gmux.c Backlight control | ||
| 3527 | </sect2> | ||
| 3528 | <sect2> | ||
| 3529 | <title>Public functions</title> | ||
| 3530 | !Iinclude/linux/apple-gmux.h | ||
| 3531 | </sect2> | ||
| 3532 | </sect1> | ||
| 3533 | </chapter> | ||
| 3534 | |||
| 3535 | !Cdrivers/gpu/vga/vga_switcheroo.c | ||
| 3536 | !Cinclude/linux/vga_switcheroo.h | ||
| 3537 | !Cdrivers/platform/x86/apple-gmux.c | ||
| 3538 | </part> | ||
| 3539 | |||
| 3540 | </book> | ||
| @@ -1 +0,0 @@ | |||
| 1 | !*.svg | ||
| @@ -1,427 +0,0 @@ | |||
| 1 | ### | ||
| 2 | # Media build rules - Auto-generates media contents/indexes and *.h xml's | ||
| 3 | # | ||
| 4 | |||
| 5 | SHELL=/bin/bash | ||
| 6 | |||
| 7 | MEDIA_OBJ_DIR=$(objtree)/Documentation/DocBook/ | ||
| 8 | MEDIA_SRC_DIR=$(srctree)/Documentation/DocBook/media | ||
| 9 | |||
| 10 | MEDIA_TEMP = media-entities.tmpl \ | ||
| 11 | media-indices.tmpl \ | ||
| 12 | videodev2.h.xml \ | ||
| 13 | v4l2.xml \ | ||
| 14 | audio.h.xml \ | ||
| 15 | ca.h.xml \ | ||
| 16 | dmx.h.xml \ | ||
| 17 | frontend.h.xml \ | ||
| 18 | net.h.xml \ | ||
| 19 | video.h.xml \ | ||
| 20 | |||
| 21 | IMGFILES := $(patsubst %.b64,%, $(notdir $(shell ls $(MEDIA_SRC_DIR)/*.b64))) | ||
| 22 | OBJIMGFILES := $(addprefix $(MEDIA_OBJ_DIR)/, $(IMGFILES)) | ||
| 23 | GENFILES := $(addprefix $(MEDIA_OBJ_DIR)/, $(MEDIA_TEMP)) | ||
| 24 | |||
| 25 | PHONY += cleanmediadocs | ||
| 26 | |||
| 27 | cleanmediadocs: | ||
| 28 | -@rm -f `find $(MEDIA_OBJ_DIR) -type l` $(GENFILES) $(OBJIMGFILES) 2>/dev/null | ||
| 29 | |||
| 30 | $(obj)/media_api.xml: $(GENFILES) FORCE | ||
| 31 | |||
| 32 | #$(MEDIA_OBJ_DIR)/media_api.html: $(MEDIA_OBJ_DIR)/media_api.xml | ||
| 33 | #$(MEDIA_OBJ_DIR)/media_api.pdf: $(MEDIA_OBJ_DIR)/media_api.xml | ||
| 34 | #$(MEDIA_OBJ_DIR)/media_api.ps: $(MEDIA_OBJ_DIR)/media_api.xml | ||
| 35 | |||
| 36 | V4L_SGMLS = \ | ||
| 37 | $(shell ls $(MEDIA_SRC_DIR)/v4l/*.xml|perl -ne 'print "$$1 " if (m,.*/(.*)\n,)') \ | ||
| 38 | capture.c.xml \ | ||
| 39 | keytable.c.xml \ | ||
| 40 | v4l2grab.c.xml | ||
| 41 | |||
| 42 | DVB_SGMLS = \ | ||
| 43 | $(shell ls $(MEDIA_SRC_DIR)/dvb/*.xml|perl -ne 'print "$$1 " if (m,.*/(.*)\n,)') | ||
| 44 | |||
| 45 | MEDIA_SGMLS = $(addprefix ./,$(V4L_SGMLS)) $(addprefix ./,$(DVB_SGMLS)) $(addprefix ./,$(MEDIA_TEMP)) | ||
| 46 | |||
| 47 | FUNCS = \ | ||
| 48 | close \ | ||
| 49 | ioctl \ | ||
| 50 | mmap \ | ||
| 51 | munmap \ | ||
| 52 | open \ | ||
| 53 | poll \ | ||
| 54 | read \ | ||
| 55 | select \ | ||
| 56 | write \ | ||
| 57 | |||
| 58 | IOCTLS = \ | ||
| 59 | $(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/videodev2.h) \ | ||
| 60 | $(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/dvb/audio.h) \ | ||
| 61 | $(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/dvb/ca.h) \ | ||
| 62 | $(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/dvb/dmx.h) \ | ||
| 63 | $(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/dvb/frontend.h) \ | ||
| 64 | $(shell perl -ne 'print "$$1 " if /\#define\s+([A-Z][^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/dvb/net.h) \ | ||
| 65 | $(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/dvb/video.h) \ | ||
| 66 | $(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/media.h) \ | ||
| 67 | $(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/linux/cec.h) \ | ||
| 68 | $(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/v4l2-subdev.h) \ | ||
| 69 | |||
| 70 | DEFINES = \ | ||
| 71 | $(shell perl -ne 'print "$$1 " if /\#define\s+(DTV_[^\s]+)\s+/' $(srctree)/include/uapi/linux/dvb/frontend.h) \ | ||
| 72 | |||
| 73 | TYPES = \ | ||
| 74 | $(shell perl -ne 'print "$$1 " if /^typedef\s+.*\s+(\S+)\;/' $(srctree)/include/uapi/linux/videodev2.h) \ | ||
| 75 | $(shell perl -ne 'print "$$1 " if /^typedef\s+.*\s+(\S+)\;/' $(srctree)/include/uapi/linux/dvb/frontend.h) | ||
| 76 | |||
| 77 | ENUMS = \ | ||
| 78 | $(shell perl -ne 'print "$$1 " if /^enum\s+([^\s]+)\s+/' \ | ||
| 79 | $(srctree)/include/uapi/linux/videodev2.h \ | ||
| 80 | $(srctree)/include/uapi/linux/dvb/audio.h \ | ||
| 81 | $(srctree)/include/uapi/linux/dvb/ca.h \ | ||
| 82 | $(srctree)/include/uapi/linux/dvb/dmx.h \ | ||
| 83 | $(srctree)/include/uapi/linux/dvb/frontend.h \ | ||
| 84 | $(srctree)/include/uapi/linux/dvb/net.h \ | ||
| 85 | $(srctree)/include/uapi/linux/dvb/video.h \ | ||
| 86 | $(srctree)/include/uapi/linux/media.h \ | ||
| 87 | $(srctree)/include/uapi/linux/v4l2-mediabus.h \ | ||
| 88 | $(srctree)/include/uapi/linux/v4l2-subdev.h) | ||
| 89 | |||
| 90 | ENUM_DEFS = \ | ||
| 91 | $(shell perl -e 'open IN,"cat @ARGV| cpp -fpreprocessed |"; while (<IN>) { if ($$enum) {print "$$1\n" if (/\s*([A-Z]\S+)\b/); } $$enum = 0 if ($$enum && /^\}/); $$enum = 1 if(/^\s*enum\s/); }; close IN;' \ | ||
| 92 | $(srctree)/include/uapi/linux/dvb/dmx.h \ | ||
| 93 | $(srctree)/include/uapi/linux/dvb/frontend.h) | ||
| 94 | |||
| 95 | STRUCTS = \ | ||
| 96 | $(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/uapi/linux/videodev2.h) \ | ||
| 97 | $(shell perl -ne 'print "$$1 " if (/^struct\s+([^\s\{]+)\s*/)' $(srctree)/include/uapi/linux/dvb/audio.h) \ | ||
| 98 | $(shell perl -ne 'print "$$1 " if (/^struct\s+([^\s]+)\s+/)' $(srctree)/include/uapi/linux/dvb/ca.h) \ | ||
| 99 | $(shell perl -ne 'print "$$1 " if (/^struct\s+([^\s]+)\s+/)' $(srctree)/include/uapi/linux/dvb/dmx.h) \ | ||
| 100 | $(shell perl -ne 'print "$$1 " if (!/dtv\_cmds\_h/ && /^struct\s+([^\s]+)\s+/)' $(srctree)/include/uapi/linux/dvb/frontend.h) \ | ||
| 101 | $(shell perl -ne 'print "$$1 " if (/^struct\s+([^\s]+)\s+/ && !/_old/)' $(srctree)/include/uapi/linux/dvb/net.h) \ | ||
| 102 | $(shell perl -ne 'print "$$1 " if (/^struct\s+([^\s]+)\s+/)' $(srctree)/include/uapi/linux/dvb/video.h) \ | ||
| 103 | $(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/uapi/linux/media.h) \ | ||
| 104 | $(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/linux/cec.h) \ | ||
| 105 | $(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/uapi/linux/v4l2-subdev.h) \ | ||
| 106 | $(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/uapi/linux/v4l2-mediabus.h) | ||
| 107 | |||
| 108 | ERRORS = \ | ||
| 109 | E2BIG \ | ||
| 110 | EACCES \ | ||
| 111 | EAGAIN \ | ||
| 112 | EBADF \ | ||
| 113 | EBADFD \ | ||
| 114 | EBADR \ | ||
| 115 | EBADRQC \ | ||
| 116 | EBUSY \ | ||
| 117 | ECHILD \ | ||
| 118 | ECONNRESET \ | ||
| 119 | EDEADLK \ | ||
| 120 | EDOM \ | ||
| 121 | EEXIST \ | ||
| 122 | EFAULT \ | ||
| 123 | EFBIG \ | ||
| 124 | EILSEQ \ | ||
| 125 | EINIT \ | ||
| 126 | EINPROGRESS \ | ||
| 127 | EINTR \ | ||
| 128 | EINVAL \ | ||
| 129 | EIO \ | ||
| 130 | EMFILE \ | ||
| 131 | ENFILE \ | ||
| 132 | ENOBUFS \ | ||
| 133 | ENODATA \ | ||
| 134 | ENODEV \ | ||
| 135 | ENOENT \ | ||
| 136 | ENOIOCTLCMD \ | ||
| 137 | ENOMEM \ | ||
| 138 | ENOSPC \ | ||
| 139 | ENOSR \ | ||
| 140 | ENOSYS \ | ||
| 141 | ENOTSUP \ | ||
| 142 | ENOTSUPP \ | ||
| 143 | ENOTTY \ | ||
| 144 | ENXIO \ | ||
| 145 | EOPNOTSUPP \ | ||
| 146 | EOVERFLOW \ | ||
| 147 | EPERM \ | ||
| 148 | EPIPE \ | ||
| 149 | EPROTO \ | ||
| 150 | ERANGE \ | ||
| 151 | EREMOTE \ | ||
| 152 | EREMOTEIO \ | ||
| 153 | ERESTART \ | ||
| 154 | ERESTARTSYS \ | ||
| 155 | ESHUTDOWN \ | ||
| 156 | ESPIPE \ | ||
| 157 | ETIME \ | ||
| 158 | ETIMEDOUT \ | ||
| 159 | EUSERS \ | ||
| 160 | EWOULDBLOCK \ | ||
| 161 | EXDEV \ | ||
| 162 | |||
| 163 | ESCAPE = \ | ||
| 164 | -e "s/&/\\&/g" \ | ||
| 165 | -e "s/</\\</g" \ | ||
| 166 | -e "s/>/\\>/g" | ||
| 167 | |||
| 168 | FILENAME = \ | ||
| 169 | -e s,"^[^\/]*/",, \ | ||
| 170 | -e s/"\\.xml"// \ | ||
| 171 | -e s/"\\.tmpl"// \ | ||
| 172 | -e s/\\\./-/g \ | ||
| 173 | -e s/"^func-"// \ | ||
| 174 | -e s/"^pixfmt-"// \ | ||
| 175 | -e s/"^vidioc-"// | ||
| 176 | |||
| 177 | # Generate references to these structs in videodev2.h.xml. | ||
| 178 | DOCUMENTED = \ | ||
| 179 | -e "s/\(enum *\)v4l2_mpeg_cx2341x_video_\([a-z]*_spatial_filter_type\)/\1<link linkend=\"\2\">v4l2_mpeg_cx2341x_video_\2<\/link>/g" \ | ||
| 180 | -e "s/\(\(enum\|struct\) *\)\(v4l2_[a-zA-Z0-9_]*\)/\1<link linkend=\"\3\">\3<\/link>/g" \ | ||
| 181 | -e "s/\(V4L2_PIX_FMT_[A-Z0-9_]\+\)\(\s\+v4l2_fourcc\)/<link linkend=\"\1\">\1<\/link>\2/g" \ | ||
| 182 | -e ":a;s/\(linkend=\".*\)_\(.*\">\)/\1-\2/;ta" \ | ||
| 183 | -e "s/v4l2\-mpeg\-vbi\-ITV0/v4l2-mpeg-vbi-itv0-1/g" | ||
| 184 | |||
| 185 | DVB_DOCUMENTED = \ | ||
| 186 | -e "s,\(struct\s\+\)\([a-z0-9_]\+\)\(\s\+{\),\1\<link linkend=\"\2\">\2\<\/link\>\3,g" \ | ||
| 187 | -e "s,\(}\s\+\)\([a-z0-9_]\+_t\+\),\1\<link linkend=\"\2\">\2\<\/link\>,g" \ | ||
| 188 | -e "s,\(define\s\+\)\(DTV_[A-Z0-9_]\+\)\(\s\+[0-9]\+\),\1\<link linkend=\"\2\">\2\<\/link\>\3,g" \ | ||
| 189 | -e "s,<link\s\+linkend=\".*\">\(DTV_IOCTL_MAX_MSGS\|dtv_cmds_h\|__.*_old\)<\/link>,\1,g" \ | ||
| 190 | -e ":a;s/\(linkend=\".*\)_\(.*\">\)/\1-\2/;ta" \ | ||
| 191 | -e "s,\(audio-mixer\|audio-karaoke\|audio-status\|ca-slot-info\|ca-descr-info\|ca-caps\|ca-msg\|ca-descr\|ca-pid\|dmx-filter\|dmx-caps\|video-system\|video-highlight\|video-spu\|video-spu-palette\|video-navi-pack\)-t,\1,g" \ | ||
| 192 | -e "s,DTV-ISDBT-LAYER[A-C],DTV-ISDBT-LAYER,g" \ | ||
| 193 | -e "s,\(define\s\+\)\([A-Z0-9_]\+\)\(\s\+_IO\),\1\<link linkend=\"\2\">\2\<\/link\>\3,g" \ | ||
| 194 | -e "s,\(define\s\+\)\(DTV_[A-Z0-9_]\+\)\(\s\+\),\1\<link linkend=\"\2\">\2\<\/link\>\3,g" \ | ||
| 195 | -e "s,<link\s\+linkend=\".*\">\(__.*_OLD\)<\/link>,\1,g" \ | ||
| 196 | -e "s/\(linkend\=\"\)FE_SET_PROPERTY/\1FE_GET_PROPERTY/g" \ | ||
| 197 | -e "s,<link\s\+linkend=\".*\">\(DTV_ISDBS_TS_ID_LEGACY\|DTV_MAX_COMMAND\|DTV_IOCTL_MAX_MSGS\)<\/link>,\1,g" \ | ||
| 198 | |||
| 199 | # | ||
| 200 | # Media targets and dependencies | ||
| 201 | # | ||
| 202 | |||
| 203 | install_media_images = \ | ||
| 204 | $(Q)if [ "x$(findstring media_api.xml,$(DOCBOOKS))" != "x" ]; then \ | ||
| 205 | mkdir -p $(MEDIA_OBJ_DIR)/media_api; \ | ||
| 206 | cp $(OBJIMGFILES) $(MEDIA_SRC_DIR)/*.svg $(MEDIA_SRC_DIR)/v4l/*.svg $(MEDIA_OBJ_DIR)/media_api; \ | ||
| 207 | fi | ||
| 208 | |||
| 209 | $(MEDIA_OBJ_DIR)/%: $(MEDIA_SRC_DIR)/%.b64 | ||
| 210 | $(Q)base64 -d $< >$@ | ||
| 211 | |||
| 212 | $(MEDIA_OBJ_DIR)/v4l2.xml: $(OBJIMGFILES) | ||
| 213 | @$($(quiet)gen_xml) | ||
| 214 | @(ln -sf `cd $(MEDIA_SRC_DIR) && /bin/pwd`/v4l/*xml $(MEDIA_OBJ_DIR)/) | ||
| 215 | @(ln -sf `cd $(MEDIA_SRC_DIR) && /bin/pwd`/dvb/*xml $(MEDIA_OBJ_DIR)/) | ||
| 216 | |||
| 217 | $(MEDIA_OBJ_DIR)/videodev2.h.xml: $(srctree)/include/uapi/linux/videodev2.h $(MEDIA_OBJ_DIR)/v4l2.xml | ||
| 218 | @$($(quiet)gen_xml) | ||
| 219 | @( \ | ||
| 220 | echo "<programlisting>") > $@ | ||
| 221 | @( \ | ||
| 222 | expand --tabs=8 < $< | \ | ||
| 223 | sed $(ESCAPE) $(DOCUMENTED) | \ | ||
| 224 | sed 's/i\.e\./&ie;/') >> $@ | ||
| 225 | @( \ | ||
| 226 | echo "</programlisting>") >> $@ | ||
| 227 | |||
| 228 | $(MEDIA_OBJ_DIR)/audio.h.xml: $(srctree)/include/uapi/linux/dvb/audio.h $(MEDIA_OBJ_DIR)/v4l2.xml | ||
| 229 | @$($(quiet)gen_xml) | ||
| 230 | @( \ | ||
| 231 | echo "<programlisting>") > $@ | ||
| 232 | @( \ | ||
| 233 | expand --tabs=8 < $< | \ | ||
| 234 | sed $(ESCAPE) $(DVB_DOCUMENTED) | \ | ||
| 235 | sed 's/i\.e\./&ie;/') >> $@ | ||
| 236 | @( \ | ||
| 237 | echo "</programlisting>") >> $@ | ||
| 238 | |||
| 239 | $(MEDIA_OBJ_DIR)/ca.h.xml: $(srctree)/include/uapi/linux/dvb/ca.h $(MEDIA_OBJ_DIR)/v4l2.xml | ||
| 240 | @$($(quiet)gen_xml) | ||
| 241 | @( \ | ||
| 242 | echo "<programlisting>") > $@ | ||
| 243 | @( \ | ||
| 244 | expand --tabs=8 < $< | \ | ||
| 245 | sed $(ESCAPE) $(DVB_DOCUMENTED) | \ | ||
| 246 | sed 's/i\.e\./&ie;/') >> $@ | ||
| 247 | @( \ | ||
| 248 | echo "</programlisting>") >> $@ | ||
| 249 | |||
| 250 | $(MEDIA_OBJ_DIR)/dmx.h.xml: $(srctree)/include/uapi/linux/dvb/dmx.h $(MEDIA_OBJ_DIR)/v4l2.xml | ||
| 251 | @$($(quiet)gen_xml) | ||
| 252 | @( \ | ||
| 253 | echo "<programlisting>") > $@ | ||
| 254 | @( \ | ||
| 255 | for ident in $(ENUM_DEFS) ; do \ | ||
| 256 | entity=`echo $$ident | tr _ -` ; \ | ||
| 257 | r="$$r s/([^\w\-])$$ident([^\w\-])/\1\&$$entity\;\2/g;";\ | ||
| 258 | done; \ | ||
| 259 | expand --tabs=8 < $< | \ | ||
| 260 | sed $(ESCAPE) $(DVB_DOCUMENTED) | \ | ||
| 261 | sed 's/i\.e\./&ie;/' | \ | ||
| 262 | perl -ne "$$r print $$_;") >> $@ | ||
| 263 | @( \ | ||
| 264 | echo "</programlisting>") >> $@ | ||
| 265 | |||
| 266 | $(MEDIA_OBJ_DIR)/frontend.h.xml: $(srctree)/include/uapi/linux/dvb/frontend.h $(MEDIA_OBJ_DIR)/v4l2.xml | ||
| 267 | @$($(quiet)gen_xml) | ||
| 268 | @( \ | ||
| 269 | echo "<programlisting>") > $@ | ||
| 270 | @( \ | ||
| 271 | for ident in $(ENUM_DEFS) ; do \ | ||
| 272 | entity=`echo $$ident | tr _ -` ; \ | ||
| 273 | r="$$r s/([^\w\-])$$ident([^\w\-])/\1\&$$entity\;\2/g;";\ | ||
| 274 | done; \ | ||
| 275 | expand --tabs=8 < $< | \ | ||
| 276 | sed $(ESCAPE) $(DVB_DOCUMENTED) | \ | ||
| 277 | sed 's/i\.e\./&ie;/' | \ | ||
| 278 | perl -ne "$$r print $$_;") >> $@ | ||
| 279 | @( \ | ||
| 280 | echo "</programlisting>") >> $@ | ||
| 281 | |||
| 282 | $(MEDIA_OBJ_DIR)/net.h.xml: $(srctree)/include/uapi/linux/dvb/net.h $(MEDIA_OBJ_DIR)/v4l2.xml | ||
| 283 | @$($(quiet)gen_xml) | ||
| 284 | @( \ | ||
| 285 | echo "<programlisting>") > $@ | ||
| 286 | @( \ | ||
| 287 | expand --tabs=8 < $< | \ | ||
| 288 | sed $(ESCAPE) $(DVB_DOCUMENTED) | \ | ||
| 289 | sed 's/i\.e\./&ie;/') >> $@ | ||
| 290 | @( \ | ||
| 291 | echo "</programlisting>") >> $@ | ||
| 292 | |||
| 293 | $(MEDIA_OBJ_DIR)/video.h.xml: $(srctree)/include/uapi/linux/dvb/video.h $(MEDIA_OBJ_DIR)/v4l2.xml | ||
| 294 | @$($(quiet)gen_xml) | ||
| 295 | @( \ | ||
| 296 | echo "<programlisting>") > $@ | ||
| 297 | @( \ | ||
| 298 | expand --tabs=8 < $< | \ | ||
| 299 | sed $(ESCAPE) $(DVB_DOCUMENTED) | \ | ||
| 300 | sed 's/i\.e\./&ie;/') >> $@ | ||
| 301 | @( \ | ||
| 302 | echo "</programlisting>") >> $@ | ||
| 303 | |||
| 304 | $(MEDIA_OBJ_DIR)/media-entities.tmpl: $(MEDIA_OBJ_DIR)/v4l2.xml | ||
| 305 | @$($(quiet)gen_xml) | ||
| 306 | @( \ | ||
| 307 | echo "<!-- Generated file! Do not edit. -->") >$@ | ||
| 308 | @( \ | ||
| 309 | echo -e "\n<!-- Functions -->") >>$@ | ||
| 310 | @( \ | ||
| 311 | for ident in $(FUNCS) ; do \ | ||
| 312 | entity=`echo $$ident | tr _ -` ; \ | ||
| 313 | echo "<!ENTITY func-$$entity \"<link" \ | ||
| 314 | "linkend='func-$$entity'><function>$$ident()</function></link>\">" \ | ||
| 315 | >>$@ ; \ | ||
| 316 | done) | ||
| 317 | @( \ | ||
| 318 | echo -e "\n<!-- Ioctls -->") >>$@ | ||
| 319 | @( \ | ||
| 320 | for ident in `echo $(IOCTLS) | sed -e "s,VIDIOC_RESERVED,,"`; do\ | ||
| 321 | entity=`echo $$ident | tr _ -` ; \ | ||
| 322 | id=`grep -e "<refname>$$ident" -e "<section id=\"$$ident\"" $$(find $(MEDIA_SRC_DIR) -name *.xml -type f)| sed -r s,"^.*/(.*).xml.*","\1",` ; \ | ||
| 323 | if [ "$$id" != "" ]; then echo "<!ENTITY $$entity \"<link" \ | ||
| 324 | "linkend='$$id'><constant>$$ident</constant></link>\">" \ | ||
| 325 | >>$@ ; else \ | ||
| 326 | echo "Warning: undocumented ioctl: $$ident. Please document it at the media DocBook!" >&2; \ | ||
| 327 | fi; \ | ||
| 328 | done) | ||
| 329 | @( \ | ||
| 330 | echo -e "\n<!-- Defines -->") >>$@ | ||
| 331 | @( \ | ||
| 332 | for ident in $(DEFINES) ; do \ | ||
| 333 | entity=`echo $$ident | tr _ -` ; \ | ||
| 334 | echo "<!ENTITY $$entity \"<link" \ | ||
| 335 | "linkend='$$entity'><constant>$$ident</constant></link>\">" \ | ||
| 336 | >>$@ ; \ | ||
| 337 | done) | ||
| 338 | @( \ | ||
| 339 | echo -e "\n<!-- Types -->") >>$@ | ||
| 340 | @( \ | ||
| 341 | for ident in $(TYPES) ; do \ | ||
| 342 | entity=`echo $$ident | tr _ -` ; \ | ||
| 343 | echo "<!ENTITY $$entity \"<link" \ | ||
| 344 | "linkend='$$entity'>$$ident</link>\">" >>$@ ; \ | ||
| 345 | done) | ||
| 346 | @( \ | ||
| 347 | echo -e "\n<!-- Enums -->") >>$@ | ||
| 348 | @( \ | ||
| 349 | for ident in $(ENUMS) ; do \ | ||
| 350 | entity=`echo $$ident | sed -e "s/v4l2_mpeg_cx2341x_video_\([a-z]*_spatial_filter_type\)/\1/" | tr _ -` ; \ | ||
| 351 | echo "<!ENTITY $$entity \"enum <link" \ | ||
| 352 | "linkend='$$entity'>$$ident</link>\">" >>$@ ; \ | ||
| 353 | done) | ||
| 354 | @( \ | ||
| 355 | echo -e "\n<!-- Enum definitions -->") >>$@ | ||
| 356 | @( \ | ||
| 357 | for ident in $(ENUM_DEFS) ; do \ | ||
| 358 | entity=`echo $$ident | tr _ -` ; \ | ||
| 359 | echo "<!ENTITY $$entity \"<link" \ | ||
| 360 | "linkend='$$entity'><constant>$$ident</constant></link>\">" \ | ||
| 361 | >>$@ ; \ | ||
| 362 | done) | ||
| 363 | @( \ | ||
| 364 | echo -e "\n<!-- Structures -->") >>$@ | ||
| 365 | @( \ | ||
| 366 | for ident in $(STRUCTS) ; do \ | ||
| 367 | entity=`echo $$ident | tr _ - | sed s/v4l2-mpeg-vbi-ITV0/v4l2-mpeg-vbi-itv0-1/g` ; \ | ||
| 368 | echo "<!ENTITY $$entity \"struct <link" \ | ||
| 369 | "linkend='$$entity'>$$ident</link>\">" >>$@ ; \ | ||
| 370 | done) | ||
| 371 | @( \ | ||
| 372 | echo -e "\n<!-- Error Codes -->") >>$@ | ||
| 373 | @( \ | ||
| 374 | for ident in $(ERRORS) ; do \ | ||
| 375 | echo "<!ENTITY $$ident \"<errorcode>$$ident</errorcode>" \ | ||
| 376 | "error code\">" >>$@ ; \ | ||
| 377 | done) | ||
| 378 | @( \ | ||
| 379 | echo -e "\n<!-- Subsections -->") >>$@ | ||
| 380 | @( \ | ||
| 381 | for file in $(MEDIA_SGMLS) ; do \ | ||
| 382 | entity=`echo "$$file" | sed $(FILENAME) -e s/"^([^-]*)"/sub\1/` ; \ | ||
| 383 | if ! echo "$$file" | \ | ||
| 384 | grep -q -E -e '^(func|vidioc|pixfmt)-' ; then \ | ||
| 385 | echo "<!ENTITY sub-$$entity SYSTEM \"$$file\">" >>$@ ; \ | ||
| 386 | fi ; \ | ||
| 387 | done) | ||
| 388 | @( \ | ||
| 389 | echo -e "\n<!-- Function Reference -->") >>$@ | ||
| 390 | @( \ | ||
| 391 | for file in $(MEDIA_SGMLS) ; do \ | ||
| 392 | if echo "$$file" | \ | ||
| 393 | grep -q -E -e '(func|vidioc|pixfmt)-' ; then \ | ||
| 394 | entity=`echo "$$file" |sed $(FILENAME)` ; \ | ||
| 395 | echo "<!ENTITY $$entity SYSTEM \"$$file\">" >>$@ ; \ | ||
| 396 | fi ; \ | ||
| 397 | done) | ||
| 398 | |||
| 399 | # Jade can auto-generate a list-of-tables, which includes all structs, | ||
| 400 | # but we only want data types, all types, and sorted please. | ||
| 401 | $(MEDIA_OBJ_DIR)/media-indices.tmpl: $(MEDIA_OBJ_DIR)/v4l2.xml | ||
| 402 | @$($(quiet)gen_xml) | ||
| 403 | @( \ | ||
| 404 | echo "<!-- Generated file! Do not edit. -->") >$@ | ||
| 405 | @( \ | ||
| 406 | echo -e "\n<index><title>List of Types</title>") >>$@ | ||
| 407 | @( \ | ||
| 408 | for ident in $(TYPES) ; do \ | ||
| 409 | id=`echo $$ident | tr _ -` ; \ | ||
| 410 | echo "<indexentry><primaryie><link" \ | ||
| 411 | "linkend='$$id'>$$ident</link></primaryie></indexentry>" >>$@ ; \ | ||
| 412 | done) | ||
| 413 | @( \ | ||
| 414 | for ident in $(ENUMS) ; do \ | ||
| 415 | id=`echo $$ident | sed -e "s/v4l2_mpeg_cx2341x_video_\([a-z]*_spatial_filter_type\)/\1/" | tr _ -`; \ | ||
| 416 | echo "<indexentry><primaryie>enum <link" \ | ||
| 417 | "linkend='$$id'>$$ident</link></primaryie></indexentry>" >>$@ ; \ | ||
| 418 | done) | ||
| 419 | @( \ | ||
| 420 | for ident in $(STRUCTS) ; do \ | ||
| 421 | id=`echo $$ident | tr _ - | sed s/v4l2-mpeg-vbi-ITV0/v4l2-mpeg-vbi-itv0-1/g` ; \ | ||
| 422 | echo "<indexentry><primaryie>struct <link" \ | ||
| 423 | "linkend='$$id'>$$ident</link></primaryie></indexentry>" >>$@ ; \ | ||
| 424 | done) | ||
| 425 | @( \ | ||
| 426 | echo "</index>") >>$@ | ||
| 427 | |||
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| @@ -1 +0,0 @@ | |||
| 1 | !*.xml | ||
| @@ -1,1314 +0,0 @@ | |||
| 1 | <title>DVB Audio Device</title> | ||
| 2 | <para>The DVB audio device controls the MPEG2 audio decoder of the DVB hardware. It | ||
| 3 | can be accessed through <constant>/dev/dvb/adapter?/audio?</constant>. Data types and and | ||
| 4 | ioctl definitions can be accessed by including <constant>linux/dvb/audio.h</constant> in your | ||
| 5 | application. | ||
| 6 | </para> | ||
| 7 | <para>Please note that some DVB cards don’t have their own MPEG decoder, which results in | ||
| 8 | the omission of the audio and video device. | ||
| 9 | </para> | ||
| 10 | <para> | ||
| 11 | These ioctls were also used by V4L2 to control MPEG decoders implemented in V4L2. The use | ||
| 12 | of these ioctls for that purpose has been made obsolete and proper V4L2 ioctls or controls | ||
| 13 | have been created to replace that functionality.</para> | ||
| 14 | |||
| 15 | <section id="audio_data_types"> | ||
| 16 | <title>Audio Data Types</title> | ||
| 17 | <para>This section describes the structures, data types and defines used when talking to the | ||
| 18 | audio device. | ||
| 19 | </para> | ||
| 20 | |||
| 21 | <section id="audio-stream-source-t"> | ||
| 22 | <title>audio_stream_source_t</title> | ||
| 23 | <para>The audio stream source is set through the AUDIO_SELECT_SOURCE call and can take | ||
| 24 | the following values, depending on whether we are replaying from an internal (demux) or | ||
| 25 | external (user write) source. | ||
| 26 | </para> | ||
| 27 | <programlisting> | ||
| 28 | typedef enum { | ||
| 29 | AUDIO_SOURCE_DEMUX, | ||
| 30 | AUDIO_SOURCE_MEMORY | ||
| 31 | } audio_stream_source_t; | ||
| 32 | </programlisting> | ||
| 33 | <para>AUDIO_SOURCE_DEMUX selects the demultiplexer (fed either by the frontend or the | ||
| 34 | DVR device) as the source of the video stream. If AUDIO_SOURCE_MEMORY | ||
| 35 | is selected the stream comes from the application through the <constant>write()</constant> system | ||
| 36 | call. | ||
| 37 | </para> | ||
| 38 | |||
| 39 | </section> | ||
| 40 | <section id="audio-play-state-t"> | ||
| 41 | <title>audio_play_state_t</title> | ||
| 42 | <para>The following values can be returned by the AUDIO_GET_STATUS call representing the | ||
| 43 | state of audio playback. | ||
| 44 | </para> | ||
| 45 | <programlisting> | ||
| 46 | typedef enum { | ||
| 47 | AUDIO_STOPPED, | ||
| 48 | AUDIO_PLAYING, | ||
| 49 | AUDIO_PAUSED | ||
| 50 | } audio_play_state_t; | ||
| 51 | </programlisting> | ||
| 52 | |||
| 53 | </section> | ||
| 54 | <section id="audio-channel-select-t"> | ||
| 55 | <title>audio_channel_select_t</title> | ||
| 56 | <para>The audio channel selected via AUDIO_CHANNEL_SELECT is determined by the | ||
| 57 | following values. | ||
| 58 | </para> | ||
| 59 | <programlisting> | ||
| 60 | typedef enum { | ||
| 61 | AUDIO_STEREO, | ||
| 62 | AUDIO_MONO_LEFT, | ||
| 63 | AUDIO_MONO_RIGHT, | ||
| 64 | AUDIO_MONO, | ||
| 65 | AUDIO_STEREO_SWAPPED | ||
| 66 | } audio_channel_select_t; | ||
| 67 | </programlisting> | ||
| 68 | |||
| 69 | </section> | ||
| 70 | <section id="audio-status"> | ||
| 71 | <title>struct audio_status</title> | ||
| 72 | <para>The AUDIO_GET_STATUS call returns the following structure informing about various | ||
| 73 | states of the playback operation. | ||
| 74 | </para> | ||
| 75 | <programlisting> | ||
| 76 | typedef struct audio_status { | ||
| 77 | boolean AV_sync_state; | ||
| 78 | boolean mute_state; | ||
| 79 | audio_play_state_t play_state; | ||
| 80 | audio_stream_source_t stream_source; | ||
| 81 | audio_channel_select_t channel_select; | ||
| 82 | boolean bypass_mode; | ||
| 83 | audio_mixer_t mixer_state; | ||
| 84 | } audio_status_t; | ||
| 85 | </programlisting> | ||
| 86 | |||
| 87 | </section> | ||
| 88 | <section id="audio-mixer"> | ||
| 89 | <title>struct audio_mixer</title> | ||
| 90 | <para>The following structure is used by the AUDIO_SET_MIXER call to set the audio | ||
| 91 | volume. | ||
| 92 | </para> | ||
| 93 | <programlisting> | ||
| 94 | typedef struct audio_mixer { | ||
| 95 | unsigned int volume_left; | ||
| 96 | unsigned int volume_right; | ||
| 97 | } audio_mixer_t; | ||
| 98 | </programlisting> | ||
| 99 | |||
| 100 | </section> | ||
| 101 | <section id="audio_encodings"> | ||
| 102 | <title>audio encodings</title> | ||
| 103 | <para>A call to AUDIO_GET_CAPABILITIES returns an unsigned integer with the following | ||
| 104 | bits set according to the hardwares capabilities. | ||
| 105 | </para> | ||
| 106 | <programlisting> | ||
| 107 | #define AUDIO_CAP_DTS 1 | ||
| 108 | #define AUDIO_CAP_LPCM 2 | ||
| 109 | #define AUDIO_CAP_MP1 4 | ||
| 110 | #define AUDIO_CAP_MP2 8 | ||
| 111 | #define AUDIO_CAP_MP3 16 | ||
| 112 | #define AUDIO_CAP_AAC 32 | ||
| 113 | #define AUDIO_CAP_OGG 64 | ||
| 114 | #define AUDIO_CAP_SDDS 128 | ||
| 115 | #define AUDIO_CAP_AC3 256 | ||
| 116 | </programlisting> | ||
| 117 | |||
| 118 | </section> | ||
| 119 | <section id="audio-karaoke"> | ||
| 120 | <title>struct audio_karaoke</title> | ||
| 121 | <para>The ioctl AUDIO_SET_KARAOKE uses the following format: | ||
| 122 | </para> | ||
| 123 | <programlisting> | ||
| 124 | typedef | ||
| 125 | struct audio_karaoke { | ||
| 126 | int vocal1; | ||
| 127 | int vocal2; | ||
| 128 | int melody; | ||
| 129 | } audio_karaoke_t; | ||
| 130 | </programlisting> | ||
| 131 | <para>If Vocal1 or Vocal2 are non-zero, they get mixed into left and right t at 70% each. If both, | ||
| 132 | Vocal1 and Vocal2 are non-zero, Vocal1 gets mixed into the left channel and Vocal2 into the | ||
| 133 | right channel at 100% each. Ff Melody is non-zero, the melody channel gets mixed into left | ||
| 134 | and right. | ||
| 135 | </para> | ||
| 136 | |||
| 137 | </section> | ||
| 138 | <section id="audio-attributes-t"> | ||
| 139 | <title>audio attributes</title> | ||
| 140 | <para>The following attributes can be set by a call to AUDIO_SET_ATTRIBUTES: | ||
| 141 | </para> | ||
| 142 | <programlisting> | ||
| 143 | typedef uint16_t audio_attributes_t; | ||
| 144 | /⋆ bits: descr. ⋆/ | ||
| 145 | /⋆ 15-13 audio coding mode (0=ac3, 2=mpeg1, 3=mpeg2ext, 4=LPCM, 6=DTS, ⋆/ | ||
| 146 | /⋆ 12 multichannel extension ⋆/ | ||
| 147 | /⋆ 11-10 audio type (0=not spec, 1=language included) ⋆/ | ||
| 148 | /⋆ 9- 8 audio application mode (0=not spec, 1=karaoke, 2=surround) ⋆/ | ||
| 149 | /⋆ 7- 6 Quantization / DRC (mpeg audio: 1=DRC exists)(lpcm: 0=16bit, ⋆/ | ||
| 150 | /⋆ 5- 4 Sample frequency fs (0=48kHz, 1=96kHz) ⋆/ | ||
| 151 | /⋆ 2- 0 number of audio channels (n+1 channels) ⋆/ | ||
| 152 | </programlisting> | ||
| 153 | </section></section> | ||
| 154 | <section id="audio_function_calls"> | ||
| 155 | <title>Audio Function Calls</title> | ||
| 156 | |||
| 157 | |||
| 158 | <section id="audio_fopen"> | ||
| 159 | <title>open()</title> | ||
| 160 | <para>DESCRIPTION | ||
| 161 | </para> | ||
| 162 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 163 | align="char"> | ||
| 164 | <para>This system call opens a named audio device (e.g. /dev/dvb/adapter0/audio0) | ||
| 165 | for subsequent use. When an open() call has succeeded, the device will be ready | ||
| 166 | for use. The significance of blocking or non-blocking mode is described in the | ||
| 167 | documentation for functions where there is a difference. It does not affect the | ||
| 168 | semantics of the open() call itself. A device opened in blocking mode can later | ||
| 169 | be put into non-blocking mode (and vice versa) using the F_SETFL command | ||
| 170 | of the fcntl system call. This is a standard system call, documented in the Linux | ||
| 171 | manual page for fcntl. Only one user can open the Audio Device in O_RDWR | ||
| 172 | mode. All other attempts to open the device in this mode will fail, and an error | ||
| 173 | code will be returned. If the Audio Device is opened in O_RDONLY mode, the | ||
| 174 | only ioctl call that can be used is AUDIO_GET_STATUS. All other call will | ||
| 175 | return with an error code.</para> | ||
| 176 | </entry> | ||
| 177 | </row></tbody></tgroup></informaltable> | ||
| 178 | <para>SYNOPSIS | ||
| 179 | </para> | ||
| 180 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 181 | align="char"> | ||
| 182 | <para>int open(const char ⋆deviceName, int flags);</para> | ||
| 183 | </entry> | ||
| 184 | </row></tbody></tgroup></informaltable> | ||
| 185 | <para>PARAMETERS | ||
| 186 | </para> | ||
| 187 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 188 | align="char"> | ||
| 189 | <para>const char | ||
| 190 | *deviceName</para> | ||
| 191 | </entry><entry | ||
| 192 | align="char"> | ||
| 193 | <para>Name of specific audio device.</para> | ||
| 194 | </entry> | ||
| 195 | </row><row><entry | ||
| 196 | align="char"> | ||
| 197 | <para>int flags</para> | ||
| 198 | </entry><entry | ||
| 199 | align="char"> | ||
| 200 | <para>A bit-wise OR of the following flags:</para> | ||
| 201 | </entry> | ||
| 202 | </row><row><entry | ||
| 203 | align="char"> | ||
| 204 | </entry><entry | ||
| 205 | align="char"> | ||
| 206 | <para>O_RDONLY read-only access</para> | ||
| 207 | </entry> | ||
| 208 | </row><row><entry | ||
| 209 | align="char"> | ||
| 210 | </entry><entry | ||
| 211 | align="char"> | ||
| 212 | <para>O_RDWR read/write access</para> | ||
| 213 | </entry> | ||
| 214 | </row><row><entry | ||
| 215 | align="char"> | ||
| 216 | </entry><entry | ||
| 217 | align="char"> | ||
| 218 | <para>O_NONBLOCK open in non-blocking mode</para> | ||
| 219 | </entry> | ||
| 220 | </row><row><entry | ||
| 221 | align="char"> | ||
| 222 | </entry><entry | ||
| 223 | align="char"> | ||
| 224 | <para>(blocking mode is the default)</para> | ||
| 225 | </entry> | ||
| 226 | </row></tbody></tgroup></informaltable> | ||
| 227 | <para>RETURN VALUE</para> | ||
| 228 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 229 | align="char"> | ||
| 230 | <para>ENODEV</para> | ||
| 231 | </entry><entry | ||
| 232 | align="char"> | ||
| 233 | <para>Device driver not loaded/available.</para> | ||
| 234 | </entry> | ||
| 235 | </row><row><entry | ||
| 236 | align="char"> | ||
| 237 | <para>EBUSY</para> | ||
| 238 | </entry><entry | ||
| 239 | align="char"> | ||
| 240 | <para>Device or resource busy.</para> | ||
| 241 | </entry> | ||
| 242 | </row><row><entry | ||
| 243 | align="char"> | ||
| 244 | <para>EINVAL</para> | ||
| 245 | </entry><entry | ||
| 246 | align="char"> | ||
| 247 | <para>Invalid argument.</para> | ||
| 248 | </entry> | ||
| 249 | </row></tbody></tgroup></informaltable> | ||
| 250 | |||
| 251 | </section> | ||
| 252 | <section id="audio_fclose"> | ||
| 253 | <title>close()</title> | ||
| 254 | <para>DESCRIPTION | ||
| 255 | </para> | ||
| 256 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 257 | align="char"> | ||
| 258 | <para>This system call closes a previously opened audio device.</para> | ||
| 259 | </entry> | ||
| 260 | </row></tbody></tgroup></informaltable> | ||
| 261 | <para>SYNOPSIS | ||
| 262 | </para> | ||
| 263 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 264 | align="char"> | ||
| 265 | <para>int close(int fd);</para> | ||
| 266 | </entry> | ||
| 267 | </row></tbody></tgroup></informaltable> | ||
| 268 | <para>PARAMETERS | ||
| 269 | </para> | ||
| 270 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 271 | align="char"> | ||
| 272 | <para>int fd</para> | ||
| 273 | </entry><entry | ||
| 274 | align="char"> | ||
| 275 | <para>File descriptor returned by a previous call to open().</para> | ||
| 276 | </entry> | ||
| 277 | </row></tbody></tgroup></informaltable> | ||
| 278 | <para>RETURN VALUE</para> | ||
| 279 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 280 | align="char"> | ||
| 281 | <para>EBADF</para> | ||
| 282 | </entry><entry | ||
| 283 | align="char"> | ||
| 284 | <para>fd is not a valid open file descriptor.</para> | ||
| 285 | </entry> | ||
| 286 | </row></tbody></tgroup></informaltable> | ||
| 287 | |||
| 288 | </section> | ||
| 289 | <section id="audio_fwrite"> | ||
| 290 | <title>write()</title> | ||
| 291 | <para>DESCRIPTION | ||
| 292 | </para> | ||
| 293 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 294 | align="char"> | ||
| 295 | <para>This system call can only be used if AUDIO_SOURCE_MEMORY is selected | ||
| 296 | in the ioctl call AUDIO_SELECT_SOURCE. The data provided shall be in | ||
| 297 | PES format. If O_NONBLOCK is not specified the function will block until | ||
| 298 | buffer space is available. The amount of data to be transferred is implied by | ||
| 299 | count.</para> | ||
| 300 | </entry> | ||
| 301 | </row></tbody></tgroup></informaltable> | ||
| 302 | <para>SYNOPSIS | ||
| 303 | </para> | ||
| 304 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 305 | align="char"> | ||
| 306 | <para>size_t write(int fd, const void ⋆buf, size_t count);</para> | ||
| 307 | </entry> | ||
| 308 | </row></tbody></tgroup></informaltable> | ||
| 309 | <para>PARAMETERS | ||
| 310 | </para> | ||
| 311 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 312 | align="char"> | ||
| 313 | <para>int fd</para> | ||
| 314 | </entry><entry | ||
| 315 | align="char"> | ||
| 316 | <para>File descriptor returned by a previous call to open().</para> | ||
| 317 | </entry> | ||
| 318 | </row><row><entry | ||
| 319 | align="char"> | ||
| 320 | <para>void *buf</para> | ||
| 321 | </entry><entry | ||
| 322 | align="char"> | ||
| 323 | <para>Pointer to the buffer containing the PES data.</para> | ||
| 324 | </entry> | ||
| 325 | </row><row><entry | ||
| 326 | align="char"> | ||
| 327 | <para>size_t count</para> | ||
| 328 | </entry><entry | ||
| 329 | align="char"> | ||
| 330 | <para>Size of buf.</para> | ||
| 331 | </entry> | ||
| 332 | </row></tbody></tgroup></informaltable> | ||
| 333 | <para>RETURN VALUE</para> | ||
| 334 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 335 | align="char"> | ||
| 336 | <para>EPERM</para> | ||
| 337 | </entry><entry | ||
| 338 | align="char"> | ||
| 339 | <para>Mode AUDIO_SOURCE_MEMORY not selected.</para> | ||
| 340 | </entry> | ||
| 341 | </row><row><entry | ||
| 342 | align="char"> | ||
| 343 | <para>ENOMEM</para> | ||
| 344 | </entry><entry | ||
| 345 | align="char"> | ||
| 346 | <para>Attempted to write more data than the internal buffer can | ||
| 347 | hold.</para> | ||
| 348 | </entry> | ||
| 349 | </row><row><entry | ||
| 350 | align="char"> | ||
| 351 | <para>EBADF</para> | ||
| 352 | </entry><entry | ||
| 353 | align="char"> | ||
| 354 | <para>fd is not a valid open file descriptor.</para> | ||
| 355 | </entry> | ||
| 356 | </row></tbody></tgroup></informaltable> | ||
| 357 | |||
| 358 | </section><section id="AUDIO_STOP" | ||
| 359 | role="subsection"><title>AUDIO_STOP</title> | ||
| 360 | <para>DESCRIPTION | ||
| 361 | </para> | ||
| 362 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 363 | align="char"> | ||
| 364 | <para>This ioctl call asks the Audio Device to stop playing the current stream.</para> | ||
| 365 | </entry> | ||
| 366 | </row></tbody></tgroup></informaltable> | ||
| 367 | <para>SYNOPSIS | ||
| 368 | </para> | ||
| 369 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 370 | align="char"> | ||
| 371 | <para>int ioctl(int fd, int request = AUDIO_STOP);</para> | ||
| 372 | </entry> | ||
| 373 | </row></tbody></tgroup></informaltable> | ||
| 374 | <para>PARAMETERS | ||
| 375 | </para> | ||
| 376 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 377 | align="char"> | ||
| 378 | <para>int fd</para> | ||
| 379 | </entry><entry | ||
| 380 | align="char"> | ||
| 381 | <para>File descriptor returned by a previous call to open().</para> | ||
| 382 | </entry> | ||
| 383 | </row><row><entry | ||
| 384 | align="char"> | ||
| 385 | <para>int request</para> | ||
| 386 | </entry><entry | ||
| 387 | align="char"> | ||
| 388 | <para>Equals AUDIO_STOP for this command.</para> | ||
| 389 | </entry> | ||
| 390 | </row></tbody></tgroup></informaltable> | ||
| 391 | &return-value-dvb; | ||
| 392 | |||
| 393 | </section><section id="AUDIO_PLAY" | ||
| 394 | role="subsection"><title>AUDIO_PLAY</title> | ||
| 395 | <para>DESCRIPTION | ||
| 396 | </para> | ||
| 397 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 398 | align="char"> | ||
| 399 | <para>This ioctl call asks the Audio Device to start playing an audio stream from the | ||
| 400 | selected source.</para> | ||
| 401 | </entry> | ||
| 402 | </row></tbody></tgroup></informaltable> | ||
| 403 | <para>SYNOPSIS | ||
| 404 | </para> | ||
| 405 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 406 | align="char"> | ||
| 407 | <para>int ioctl(int fd, int request = AUDIO_PLAY);</para> | ||
| 408 | </entry> | ||
| 409 | </row></tbody></tgroup></informaltable> | ||
| 410 | <para>PARAMETERS | ||
| 411 | </para> | ||
| 412 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 413 | align="char"> | ||
| 414 | <para>int fd</para> | ||
| 415 | </entry><entry | ||
| 416 | align="char"> | ||
| 417 | <para>File descriptor returned by a previous call to open().</para> | ||
| 418 | </entry> | ||
| 419 | </row><row><entry | ||
| 420 | align="char"> | ||
| 421 | <para>int request</para> | ||
| 422 | </entry><entry | ||
| 423 | align="char"> | ||
| 424 | <para>Equals AUDIO_PLAY for this command.</para> | ||
| 425 | </entry> | ||
| 426 | </row></tbody></tgroup></informaltable> | ||
| 427 | &return-value-dvb; | ||
| 428 | |||
| 429 | </section><section id="AUDIO_PAUSE" | ||
| 430 | role="subsection"><title>AUDIO_PAUSE</title> | ||
| 431 | <para>DESCRIPTION | ||
| 432 | </para> | ||
| 433 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 434 | align="char"> | ||
| 435 | <para>This ioctl call suspends the audio stream being played. Decoding and playing | ||
| 436 | are paused. It is then possible to restart again decoding and playing process of | ||
| 437 | the audio stream using AUDIO_CONTINUE command.</para> | ||
| 438 | </entry> | ||
| 439 | </row><row><entry | ||
| 440 | align="char"> | ||
| 441 | <para>If AUDIO_SOURCE_MEMORY is selected in the ioctl call | ||
| 442 | AUDIO_SELECT_SOURCE, the DVB-subsystem will not decode (consume) | ||
| 443 | any more data until the ioctl call AUDIO_CONTINUE or AUDIO_PLAY is | ||
| 444 | performed.</para> | ||
| 445 | </entry> | ||
| 446 | </row></tbody></tgroup></informaltable> | ||
| 447 | <para>SYNOPSIS | ||
| 448 | </para> | ||
| 449 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 450 | align="char"> | ||
| 451 | <para>int ioctl(int fd, int request = AUDIO_PAUSE);</para> | ||
| 452 | </entry> | ||
| 453 | </row></tbody></tgroup></informaltable> | ||
| 454 | <para>PARAMETERS | ||
| 455 | </para> | ||
| 456 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 457 | align="char"> | ||
| 458 | <para>int fd</para> | ||
| 459 | </entry><entry | ||
| 460 | align="char"> | ||
| 461 | <para>File descriptor returned by a previous call to open().</para> | ||
| 462 | </entry> | ||
| 463 | </row><row><entry | ||
| 464 | align="char"> | ||
| 465 | <para>int request</para> | ||
| 466 | </entry><entry | ||
| 467 | align="char"> | ||
| 468 | <para>Equals AUDIO_PAUSE for this command.</para> | ||
| 469 | </entry> | ||
| 470 | </row></tbody></tgroup></informaltable> | ||
| 471 | &return-value-dvb; | ||
| 472 | |||
| 473 | </section><section id="AUDIO_CONTINUE" | ||
| 474 | role="subsection"><title>AUDIO_CONTINUE</title> | ||
| 475 | <para>DESCRIPTION | ||
| 476 | </para> | ||
| 477 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 478 | align="char"> | ||
| 479 | <para>This ioctl restarts the decoding and playing process previously paused | ||
| 480 | with AUDIO_PAUSE command.</para> | ||
| 481 | </entry> | ||
| 482 | </row><row><entry | ||
| 483 | align="char"> | ||
| 484 | <para>It only works if the stream were previously stopped with AUDIO_PAUSE</para> | ||
| 485 | </entry> | ||
| 486 | </row></tbody></tgroup></informaltable> | ||
| 487 | <para>SYNOPSIS | ||
| 488 | </para> | ||
| 489 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 490 | align="char"> | ||
| 491 | <para>int ioctl(int fd, int request = AUDIO_CONTINUE);</para> | ||
| 492 | </entry> | ||
| 493 | </row></tbody></tgroup></informaltable> | ||
| 494 | <para>PARAMETERS | ||
| 495 | </para> | ||
| 496 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 497 | align="char"> | ||
| 498 | <para>int fd</para> | ||
| 499 | </entry><entry | ||
| 500 | align="char"> | ||
| 501 | <para>File descriptor returned by a previous call to open().</para> | ||
| 502 | </entry> | ||
| 503 | </row><row><entry | ||
| 504 | align="char"> | ||
| 505 | <para>int request</para> | ||
| 506 | </entry><entry | ||
| 507 | align="char"> | ||
| 508 | <para>Equals AUDIO_CONTINUE for this command.</para> | ||
| 509 | </entry> | ||
| 510 | </row></tbody></tgroup></informaltable> | ||
| 511 | &return-value-dvb; | ||
| 512 | |||
| 513 | </section><section id="AUDIO_SELECT_SOURCE" | ||
| 514 | role="subsection"><title>AUDIO_SELECT_SOURCE</title> | ||
| 515 | <para>DESCRIPTION | ||
| 516 | </para> | ||
| 517 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 518 | align="char"> | ||
| 519 | <para>This ioctl call informs the audio device which source shall be used | ||
| 520 | for the input data. The possible sources are demux or memory. If | ||
| 521 | AUDIO_SOURCE_MEMORY is selected, the data is fed to the Audio Device | ||
| 522 | through the write command.</para> | ||
| 523 | </entry> | ||
| 524 | </row></tbody></tgroup></informaltable> | ||
| 525 | <para>SYNOPSIS | ||
| 526 | </para> | ||
| 527 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 528 | align="char"> | ||
| 529 | <para>int ioctl(int fd, int request = AUDIO_SELECT_SOURCE, | ||
| 530 | audio_stream_source_t source);</para> | ||
| 531 | </entry> | ||
| 532 | </row></tbody></tgroup></informaltable> | ||
| 533 | <para>PARAMETERS | ||
| 534 | </para> | ||
| 535 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 536 | align="char"> | ||
| 537 | <para>int fd</para> | ||
| 538 | </entry><entry | ||
| 539 | align="char"> | ||
| 540 | <para>File descriptor returned by a previous call to open().</para> | ||
| 541 | </entry> | ||
| 542 | </row><row><entry | ||
| 543 | align="char"> | ||
| 544 | <para>int request</para> | ||
| 545 | </entry><entry | ||
| 546 | align="char"> | ||
| 547 | <para>Equals AUDIO_SELECT_SOURCE for this command.</para> | ||
| 548 | </entry> | ||
| 549 | </row><row><entry | ||
| 550 | align="char"> | ||
| 551 | <para>audio_stream_source_t | ||
| 552 | source</para> | ||
| 553 | </entry><entry | ||
| 554 | align="char"> | ||
| 555 | <para>Indicates the source that shall be used for the Audio | ||
| 556 | stream.</para> | ||
| 557 | </entry> | ||
| 558 | </row></tbody></tgroup></informaltable> | ||
| 559 | &return-value-dvb; | ||
| 560 | |||
| 561 | </section><section id="AUDIO_SET_MUTE" | ||
| 562 | role="subsection"><title>AUDIO_SET_MUTE</title> | ||
| 563 | <para>DESCRIPTION | ||
| 564 | </para> | ||
| 565 | <para>This ioctl is for DVB devices only. To control a V4L2 decoder use the V4L2 | ||
| 566 | &VIDIOC-DECODER-CMD; with the <constant>V4L2_DEC_CMD_START_MUTE_AUDIO</constant> flag instead.</para> | ||
| 567 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 568 | align="char"> | ||
| 569 | <para>This ioctl call asks the audio device to mute the stream that is currently being | ||
| 570 | played.</para> | ||
| 571 | </entry> | ||
| 572 | </row></tbody></tgroup></informaltable> | ||
| 573 | <para>SYNOPSIS | ||
| 574 | </para> | ||
| 575 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 576 | align="char"> | ||
| 577 | <para>int ioctl(int fd, int request = AUDIO_SET_MUTE, | ||
| 578 | boolean state);</para> | ||
| 579 | </entry> | ||
| 580 | </row></tbody></tgroup></informaltable> | ||
| 581 | <para>PARAMETERS | ||
| 582 | </para> | ||
| 583 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 584 | align="char"> | ||
| 585 | <para>int fd</para> | ||
| 586 | </entry><entry | ||
| 587 | align="char"> | ||
| 588 | <para>File descriptor returned by a previous call to open().</para> | ||
| 589 | </entry> | ||
| 590 | </row><row><entry | ||
| 591 | align="char"> | ||
| 592 | <para>int request</para> | ||
| 593 | </entry><entry | ||
| 594 | align="char"> | ||
| 595 | <para>Equals AUDIO_SET_MUTE for this command.</para> | ||
| 596 | </entry> | ||
| 597 | </row><row><entry | ||
| 598 | align="char"> | ||
| 599 | <para>boolean state</para> | ||
| 600 | </entry><entry | ||
| 601 | align="char"> | ||
| 602 | <para>Indicates if audio device shall mute or not.</para> | ||
| 603 | </entry> | ||
| 604 | </row><row><entry | ||
| 605 | align="char"> | ||
| 606 | </entry><entry | ||
| 607 | align="char"> | ||
| 608 | <para>TRUE Audio Mute</para> | ||
| 609 | </entry> | ||
| 610 | </row><row><entry | ||
| 611 | align="char"> | ||
| 612 | </entry><entry | ||
| 613 | align="char"> | ||
| 614 | <para>FALSE Audio Un-mute</para> | ||
| 615 | </entry> | ||
| 616 | </row></tbody></tgroup></informaltable> | ||
| 617 | &return-value-dvb; | ||
| 618 | |||
| 619 | </section><section id="AUDIO_SET_AV_SYNC" | ||
| 620 | role="subsection"><title>AUDIO_SET_AV_SYNC</title> | ||
| 621 | <para>DESCRIPTION | ||
| 622 | </para> | ||
| 623 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 624 | align="char"> | ||
| 625 | <para>This ioctl call asks the Audio Device to turn ON or OFF A/V synchronization.</para> | ||
| 626 | </entry> | ||
| 627 | </row></tbody></tgroup></informaltable> | ||
| 628 | <para>SYNOPSIS | ||
| 629 | </para> | ||
| 630 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 631 | align="char"> | ||
| 632 | <para>int ioctl(int fd, int request = AUDIO_SET_AV_SYNC, | ||
| 633 | boolean state);</para> | ||
| 634 | </entry> | ||
| 635 | </row></tbody></tgroup></informaltable> | ||
| 636 | <para>PARAMETERS | ||
| 637 | </para> | ||
| 638 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 639 | align="char"> | ||
| 640 | <para>int fd</para> | ||
| 641 | </entry><entry | ||
| 642 | align="char"> | ||
| 643 | <para>File descriptor returned by a previous call to open().</para> | ||
| 644 | </entry> | ||
| 645 | </row><row><entry | ||
| 646 | align="char"> | ||
| 647 | <para>int request</para> | ||
| 648 | </entry><entry | ||
| 649 | align="char"> | ||
| 650 | <para>Equals AUDIO_AV_SYNC for this command.</para> | ||
| 651 | </entry> | ||
| 652 | </row><row><entry | ||
| 653 | align="char"> | ||
| 654 | <para>boolean state</para> | ||
| 655 | </entry><entry | ||
| 656 | align="char"> | ||
| 657 | <para>Tells the DVB subsystem if A/V synchronization shall be | ||
| 658 | ON or OFF.</para> | ||
| 659 | </entry> | ||
| 660 | </row><row><entry | ||
| 661 | align="char"> | ||
| 662 | </entry><entry | ||
| 663 | align="char"> | ||
| 664 | <para>TRUE AV-sync ON</para> | ||
| 665 | </entry> | ||
| 666 | </row><row><entry | ||
| 667 | align="char"> | ||
| 668 | </entry><entry | ||
| 669 | align="char"> | ||
| 670 | <para>FALSE AV-sync OFF</para> | ||
| 671 | </entry> | ||
| 672 | </row></tbody></tgroup></informaltable> | ||
| 673 | &return-value-dvb; | ||
| 674 | |||
| 675 | </section><section id="AUDIO_SET_BYPASS_MODE" | ||
| 676 | role="subsection"><title>AUDIO_SET_BYPASS_MODE</title> | ||
| 677 | <para>DESCRIPTION | ||
| 678 | </para> | ||
| 679 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 680 | align="char"> | ||
| 681 | <para>This ioctl call asks the Audio Device to bypass the Audio decoder and forward | ||
| 682 | the stream without decoding. This mode shall be used if streams that can’t be | ||
| 683 | handled by the DVB system shall be decoded. Dolby DigitalTM streams are | ||
| 684 | automatically forwarded by the DVB subsystem if the hardware can handle it.</para> | ||
| 685 | </entry> | ||
| 686 | </row></tbody></tgroup></informaltable> | ||
| 687 | <para>SYNOPSIS | ||
| 688 | </para> | ||
| 689 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 690 | align="char"> | ||
| 691 | <para>int ioctl(int fd, int request = | ||
| 692 | AUDIO_SET_BYPASS_MODE, boolean mode);</para> | ||
| 693 | </entry> | ||
| 694 | </row></tbody></tgroup></informaltable> | ||
| 695 | <para>PARAMETERS | ||
| 696 | </para> | ||
| 697 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 698 | align="char"> | ||
| 699 | <para>int fd</para> | ||
| 700 | </entry><entry | ||
| 701 | align="char"> | ||
| 702 | <para>File descriptor returned by a previous call to open().</para> | ||
| 703 | </entry> | ||
| 704 | </row><row><entry | ||
| 705 | align="char"> | ||
| 706 | <para>int request</para> | ||
| 707 | </entry><entry | ||
| 708 | align="char"> | ||
| 709 | <para>Equals AUDIO_SET_BYPASS_MODE for this | ||
| 710 | command.</para> | ||
| 711 | </entry> | ||
| 712 | </row><row><entry | ||
| 713 | align="char"> | ||
| 714 | <para>boolean mode</para> | ||
| 715 | </entry><entry | ||
| 716 | align="char"> | ||
| 717 | <para>Enables or disables the decoding of the current Audio | ||
| 718 | stream in the DVB subsystem.</para> | ||
| 719 | </entry> | ||
| 720 | </row><row><entry | ||
| 721 | align="char"> | ||
| 722 | </entry><entry | ||
| 723 | align="char"> | ||
| 724 | <para>TRUE Bypass is disabled</para> | ||
| 725 | </entry> | ||
| 726 | </row><row><entry | ||
| 727 | align="char"> | ||
| 728 | </entry><entry | ||
| 729 | align="char"> | ||
| 730 | <para>FALSE Bypass is enabled</para> | ||
| 731 | </entry> | ||
| 732 | </row></tbody></tgroup></informaltable> | ||
| 733 | &return-value-dvb; | ||
| 734 | |||
| 735 | </section><section id="AUDIO_CHANNEL_SELECT" | ||
| 736 | role="subsection"><title>AUDIO_CHANNEL_SELECT</title> | ||
| 737 | <para>DESCRIPTION | ||
| 738 | </para> | ||
| 739 | <para>This ioctl is for DVB devices only. To control a V4L2 decoder use the V4L2 | ||
| 740 | <constant>V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK</constant> control instead.</para> | ||
| 741 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 742 | align="char"> | ||
| 743 | <para>This ioctl call asks the Audio Device to select the requested channel if possible.</para> | ||
| 744 | </entry> | ||
| 745 | </row></tbody></tgroup></informaltable> | ||
| 746 | <para>SYNOPSIS | ||
| 747 | </para> | ||
| 748 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 749 | align="char"> | ||
| 750 | <para>int ioctl(int fd, int request = | ||
| 751 | AUDIO_CHANNEL_SELECT, audio_channel_select_t);</para> | ||
| 752 | </entry> | ||
| 753 | </row></tbody></tgroup></informaltable> | ||
| 754 | <para>PARAMETERS | ||
| 755 | </para> | ||
| 756 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 757 | align="char"> | ||
| 758 | <para>int fd</para> | ||
| 759 | </entry><entry | ||
| 760 | align="char"> | ||
| 761 | <para>File descriptor returned by a previous call to open().</para> | ||
| 762 | </entry> | ||
| 763 | </row><row><entry | ||
| 764 | align="char"> | ||
| 765 | <para>int request</para> | ||
| 766 | </entry><entry | ||
| 767 | align="char"> | ||
| 768 | <para>Equals AUDIO_CHANNEL_SELECT for this | ||
| 769 | command.</para> | ||
| 770 | </entry> | ||
| 771 | </row><row><entry | ||
| 772 | align="char"> | ||
| 773 | <para>audio_channel_select_t | ||
| 774 | ch</para> | ||
| 775 | </entry><entry | ||
| 776 | align="char"> | ||
| 777 | <para>Select the output format of the audio (mono left/right, | ||
| 778 | stereo).</para> | ||
| 779 | </entry> | ||
| 780 | </row></tbody></tgroup></informaltable> | ||
| 781 | &return-value-dvb; | ||
| 782 | |||
| 783 | </section><section id="AUDIO_BILINGUAL_CHANNEL_SELECT" | ||
| 784 | role="subsection"><title>AUDIO_BILINGUAL_CHANNEL_SELECT</title> | ||
| 785 | <para>DESCRIPTION | ||
| 786 | </para> | ||
| 787 | <para>This ioctl is obsolete. Do not use in new drivers. It has been replaced by | ||
| 788 | the V4L2 <constant>V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK</constant> control | ||
| 789 | for MPEG decoders controlled through V4L2.</para> | ||
| 790 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 791 | align="char"> | ||
| 792 | <para>This ioctl call asks the Audio Device to select the requested channel for bilingual streams if possible.</para> | ||
| 793 | </entry> | ||
| 794 | </row></tbody></tgroup></informaltable> | ||
| 795 | <para>SYNOPSIS | ||
| 796 | </para> | ||
| 797 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 798 | align="char"> | ||
| 799 | <para>int ioctl(int fd, int request = | ||
| 800 | AUDIO_BILINGUAL_CHANNEL_SELECT, audio_channel_select_t);</para> | ||
| 801 | </entry> | ||
| 802 | </row></tbody></tgroup></informaltable> | ||
| 803 | <para>PARAMETERS | ||
| 804 | </para> | ||
| 805 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 806 | align="char"> | ||
| 807 | <para>int fd</para> | ||
| 808 | </entry><entry | ||
| 809 | align="char"> | ||
| 810 | <para>File descriptor returned by a previous call to open().</para> | ||
| 811 | </entry> | ||
| 812 | </row><row><entry | ||
| 813 | align="char"> | ||
| 814 | <para>int request</para> | ||
| 815 | </entry><entry | ||
| 816 | align="char"> | ||
| 817 | <para>Equals AUDIO_BILINGUAL_CHANNEL_SELECT for this | ||
| 818 | command.</para> | ||
| 819 | </entry> | ||
| 820 | </row><row><entry | ||
| 821 | align="char"> | ||
| 822 | <para>audio_channel_select_t | ||
| 823 | ch</para> | ||
| 824 | </entry><entry | ||
| 825 | align="char"> | ||
| 826 | <para>Select the output format of the audio (mono left/right, | ||
| 827 | stereo).</para> | ||
| 828 | </entry> | ||
| 829 | </row> | ||
| 830 | </tbody></tgroup></informaltable> | ||
| 831 | &return-value-dvb; | ||
| 832 | |||
| 833 | </section><section id="AUDIO_GET_PTS" | ||
| 834 | role="subsection"><title>AUDIO_GET_PTS</title> | ||
| 835 | <para>DESCRIPTION | ||
| 836 | </para> | ||
| 837 | <para>This ioctl is obsolete. Do not use in new drivers. If you need this functionality, | ||
| 838 | then please contact the linux-media mailing list (&v4l-ml;).</para> | ||
| 839 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 840 | align="char"> | ||
| 841 | <para>This ioctl call asks the Audio Device to return the current PTS timestamp.</para> | ||
| 842 | </entry> | ||
| 843 | </row></tbody></tgroup></informaltable> | ||
| 844 | <para>SYNOPSIS | ||
| 845 | </para> | ||
| 846 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 847 | align="char"> | ||
| 848 | <para>int ioctl(int fd, int request = | ||
| 849 | AUDIO_GET_PTS, __u64 *pts);</para> | ||
| 850 | </entry> | ||
| 851 | </row></tbody></tgroup></informaltable> | ||
| 852 | <para>PARAMETERS | ||
| 853 | </para> | ||
| 854 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 855 | align="char"> | ||
| 856 | <para>int fd</para> | ||
| 857 | </entry><entry | ||
| 858 | align="char"> | ||
| 859 | <para>File descriptor returned by a previous call to open().</para> | ||
| 860 | </entry> | ||
| 861 | </row><row><entry | ||
| 862 | align="char"> | ||
| 863 | <para>int request</para> | ||
| 864 | </entry><entry | ||
| 865 | align="char"> | ||
| 866 | <para>Equals AUDIO_GET_PTS for this | ||
| 867 | command.</para> | ||
| 868 | </entry> | ||
| 869 | </row><row><entry | ||
| 870 | align="char"> | ||
| 871 | <para>__u64 *pts | ||
| 872 | </para> | ||
| 873 | </entry><entry | ||
| 874 | align="char"> | ||
| 875 | <para>Returns the 33-bit timestamp as defined in ITU T-REC-H.222.0 / ISO/IEC 13818-1. | ||
| 876 | </para> | ||
| 877 | <para> | ||
| 878 | The PTS should belong to the currently played | ||
| 879 | frame if possible, but may also be a value close to it | ||
| 880 | like the PTS of the last decoded frame or the last PTS | ||
| 881 | extracted by the PES parser.</para> | ||
| 882 | </entry> | ||
| 883 | </row></tbody></tgroup></informaltable> | ||
| 884 | &return-value-dvb; | ||
| 885 | |||
| 886 | </section><section id="AUDIO_GET_STATUS" | ||
| 887 | role="subsection"><title>AUDIO_GET_STATUS</title> | ||
| 888 | <para>DESCRIPTION | ||
| 889 | </para> | ||
| 890 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 891 | align="char"> | ||
| 892 | <para>This ioctl call asks the Audio Device to return the current state of the Audio | ||
| 893 | Device.</para> | ||
| 894 | </entry> | ||
| 895 | </row></tbody></tgroup></informaltable> | ||
| 896 | <para>SYNOPSIS | ||
| 897 | </para> | ||
| 898 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 899 | align="char"> | ||
| 900 | <para>int ioctl(int fd, int request = AUDIO_GET_STATUS, | ||
| 901 | struct audio_status ⋆status);</para> | ||
| 902 | </entry> | ||
| 903 | </row></tbody></tgroup></informaltable> | ||
| 904 | <para>PARAMETERS | ||
| 905 | </para> | ||
| 906 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 907 | align="char"> | ||
| 908 | <para>int fd</para> | ||
| 909 | </entry><entry | ||
| 910 | align="char"> | ||
| 911 | <para>File descriptor returned by a previous call to open().</para> | ||
| 912 | </entry> | ||
| 913 | </row><row><entry | ||
| 914 | align="char"> | ||
| 915 | <para>int request</para> | ||
| 916 | </entry><entry | ||
| 917 | align="char"> | ||
| 918 | <para>Equals AUDIO_GET_STATUS for this command.</para> | ||
| 919 | </entry> | ||
| 920 | </row><row><entry | ||
| 921 | align="char"> | ||
| 922 | <para>struct audio_status | ||
| 923 | *status</para> | ||
| 924 | </entry><entry | ||
| 925 | align="char"> | ||
| 926 | <para>Returns the current state of Audio Device.</para> | ||
| 927 | </entry> | ||
| 928 | </row></tbody></tgroup></informaltable> | ||
| 929 | &return-value-dvb; | ||
| 930 | |||
| 931 | </section><section id="AUDIO_GET_CAPABILITIES" | ||
| 932 | role="subsection"><title>AUDIO_GET_CAPABILITIES</title> | ||
| 933 | <para>DESCRIPTION | ||
| 934 | </para> | ||
| 935 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 936 | align="char"> | ||
| 937 | <para>This ioctl call asks the Audio Device to tell us about the decoding capabilities | ||
| 938 | of the audio hardware.</para> | ||
| 939 | </entry> | ||
| 940 | </row></tbody></tgroup></informaltable> | ||
| 941 | <para>SYNOPSIS | ||
| 942 | </para> | ||
| 943 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 944 | align="char"> | ||
| 945 | <para>int ioctl(int fd, int request = | ||
| 946 | AUDIO_GET_CAPABILITIES, unsigned int ⋆cap);</para> | ||
| 947 | </entry> | ||
| 948 | </row></tbody></tgroup></informaltable> | ||
| 949 | <para>PARAMETERS | ||
| 950 | </para> | ||
| 951 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 952 | align="char"> | ||
| 953 | <para>int fd</para> | ||
| 954 | </entry><entry | ||
| 955 | align="char"> | ||
| 956 | <para>File descriptor returned by a previous call to open().</para> | ||
| 957 | </entry> | ||
| 958 | </row><row><entry | ||
| 959 | align="char"> | ||
| 960 | <para>int request</para> | ||
| 961 | </entry><entry | ||
| 962 | align="char"> | ||
| 963 | <para>Equals AUDIO_GET_CAPABILITIES for this | ||
| 964 | command.</para> | ||
| 965 | </entry> | ||
| 966 | </row><row><entry | ||
| 967 | align="char"> | ||
| 968 | <para>unsigned int *cap</para> | ||
| 969 | </entry><entry | ||
| 970 | align="char"> | ||
| 971 | <para>Returns a bit array of supported sound formats.</para> | ||
| 972 | </entry> | ||
| 973 | </row></tbody></tgroup></informaltable> | ||
| 974 | &return-value-dvb; | ||
| 975 | |||
| 976 | </section><section id="AUDIO_CLEAR_BUFFER" | ||
| 977 | role="subsection"><title>AUDIO_CLEAR_BUFFER</title> | ||
| 978 | <para>DESCRIPTION | ||
| 979 | </para> | ||
| 980 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 981 | align="char"> | ||
| 982 | <para>This ioctl call asks the Audio Device to clear all software and hardware buffers | ||
| 983 | of the audio decoder device.</para> | ||
| 984 | </entry> | ||
| 985 | </row></tbody></tgroup></informaltable> | ||
| 986 | <para>SYNOPSIS | ||
| 987 | </para> | ||
| 988 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 989 | align="char"> | ||
| 990 | <para>int ioctl(int fd, int request = AUDIO_CLEAR_BUFFER);</para> | ||
| 991 | </entry> | ||
| 992 | </row></tbody></tgroup></informaltable> | ||
| 993 | <para>PARAMETERS | ||
| 994 | </para> | ||
| 995 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 996 | align="char"> | ||
| 997 | <para>int fd</para> | ||
| 998 | </entry><entry | ||
| 999 | align="char"> | ||
| 1000 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1001 | </entry> | ||
| 1002 | </row><row><entry | ||
| 1003 | align="char"> | ||
| 1004 | <para>int request</para> | ||
| 1005 | </entry><entry | ||
| 1006 | align="char"> | ||
| 1007 | <para>Equals AUDIO_CLEAR_BUFFER for this command.</para> | ||
| 1008 | </entry> | ||
| 1009 | </row></tbody></tgroup></informaltable> | ||
| 1010 | &return-value-dvb; | ||
| 1011 | |||
| 1012 | </section><section id="AUDIO_SET_ID" | ||
| 1013 | role="subsection"><title>AUDIO_SET_ID</title> | ||
| 1014 | <para>DESCRIPTION | ||
| 1015 | </para> | ||
| 1016 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1017 | align="char"> | ||
| 1018 | <para>This ioctl selects which sub-stream is to be decoded if a program or system | ||
| 1019 | stream is sent to the video device. If no audio stream type is set the id has to be | ||
| 1020 | in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for AC3 and in [0xA0,0xA7] | ||
| 1021 | for LPCM. More specifications may follow for other stream types. If the stream | ||
| 1022 | type is set the id just specifies the substream id of the audio stream and only | ||
| 1023 | the first 5 bits are recognized.</para> | ||
| 1024 | </entry> | ||
| 1025 | </row></tbody></tgroup></informaltable> | ||
| 1026 | <para>SYNOPSIS | ||
| 1027 | </para> | ||
| 1028 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1029 | align="char"> | ||
| 1030 | <para>int ioctl(int fd, int request = AUDIO_SET_ID, int | ||
| 1031 | id);</para> | ||
| 1032 | </entry> | ||
| 1033 | </row></tbody></tgroup></informaltable> | ||
| 1034 | <para>PARAMETERS | ||
| 1035 | </para> | ||
| 1036 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1037 | align="char"> | ||
| 1038 | <para>int fd</para> | ||
| 1039 | </entry><entry | ||
| 1040 | align="char"> | ||
| 1041 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1042 | </entry> | ||
| 1043 | </row><row><entry | ||
| 1044 | align="char"> | ||
| 1045 | <para>int request</para> | ||
| 1046 | </entry><entry | ||
| 1047 | align="char"> | ||
| 1048 | <para>Equals AUDIO_SET_ID for this command.</para> | ||
| 1049 | </entry> | ||
| 1050 | </row><row><entry | ||
| 1051 | align="char"> | ||
| 1052 | <para>int id</para> | ||
| 1053 | </entry><entry | ||
| 1054 | align="char"> | ||
| 1055 | <para>audio sub-stream id</para> | ||
| 1056 | </entry> | ||
| 1057 | </row></tbody></tgroup></informaltable> | ||
| 1058 | &return-value-dvb; | ||
| 1059 | |||
| 1060 | </section><section id="AUDIO_SET_MIXER" | ||
| 1061 | role="subsection"><title>AUDIO_SET_MIXER</title> | ||
| 1062 | <para>DESCRIPTION | ||
| 1063 | </para> | ||
| 1064 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1065 | align="char"> | ||
| 1066 | <para>This ioctl lets you adjust the mixer settings of the audio decoder.</para> | ||
| 1067 | </entry> | ||
| 1068 | </row></tbody></tgroup></informaltable> | ||
| 1069 | <para>SYNOPSIS | ||
| 1070 | </para> | ||
| 1071 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1072 | align="char"> | ||
| 1073 | <para>int ioctl(int fd, int request = AUDIO_SET_MIXER, | ||
| 1074 | audio_mixer_t ⋆mix);</para> | ||
| 1075 | </entry> | ||
| 1076 | </row></tbody></tgroup></informaltable> | ||
| 1077 | <para>PARAMETERS | ||
| 1078 | </para> | ||
| 1079 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1080 | align="char"> | ||
| 1081 | <para>int fd</para> | ||
| 1082 | </entry><entry | ||
| 1083 | align="char"> | ||
| 1084 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1085 | </entry> | ||
| 1086 | </row><row><entry | ||
| 1087 | align="char"> | ||
| 1088 | <para>int request</para> | ||
| 1089 | </entry><entry | ||
| 1090 | align="char"> | ||
| 1091 | <para>Equals AUDIO_SET_ID for this command.</para> | ||
| 1092 | </entry> | ||
| 1093 | </row><row><entry | ||
| 1094 | align="char"> | ||
| 1095 | <para>audio_mixer_t *mix</para> | ||
| 1096 | </entry><entry | ||
| 1097 | align="char"> | ||
| 1098 | <para>mixer settings.</para> | ||
| 1099 | </entry> | ||
| 1100 | </row></tbody></tgroup></informaltable> | ||
| 1101 | &return-value-dvb; | ||
| 1102 | |||
| 1103 | </section><section id="AUDIO_SET_STREAMTYPE" | ||
| 1104 | role="subsection"><title>AUDIO_SET_STREAMTYPE</title> | ||
| 1105 | <para>DESCRIPTION | ||
| 1106 | </para> | ||
| 1107 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1108 | align="char"> | ||
| 1109 | <para>This ioctl tells the driver which kind of audio stream to expect. This is useful | ||
| 1110 | if the stream offers several audio sub-streams like LPCM and AC3.</para> | ||
| 1111 | </entry> | ||
| 1112 | </row></tbody></tgroup></informaltable> | ||
| 1113 | <para>SYNOPSIS | ||
| 1114 | </para> | ||
| 1115 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1116 | align="char"> | ||
| 1117 | <para>int ioctl(fd, int request = AUDIO_SET_STREAMTYPE, | ||
| 1118 | int type);</para> | ||
| 1119 | </entry> | ||
| 1120 | </row></tbody></tgroup></informaltable> | ||
| 1121 | <para>PARAMETERS | ||
| 1122 | </para> | ||
| 1123 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1124 | align="char"> | ||
| 1125 | <para>int fd</para> | ||
| 1126 | </entry><entry | ||
| 1127 | align="char"> | ||
| 1128 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1129 | </entry> | ||
| 1130 | </row><row><entry | ||
| 1131 | align="char"> | ||
| 1132 | <para>int request</para> | ||
| 1133 | </entry><entry | ||
| 1134 | align="char"> | ||
| 1135 | <para>Equals AUDIO_SET_STREAMTYPE for this | ||
| 1136 | command.</para> | ||
| 1137 | </entry> | ||
| 1138 | </row><row><entry | ||
| 1139 | align="char"> | ||
| 1140 | <para>int type</para> | ||
| 1141 | </entry><entry | ||
| 1142 | align="char"> | ||
| 1143 | <para>stream type</para> | ||
| 1144 | </entry> | ||
| 1145 | </row></tbody></tgroup></informaltable> | ||
| 1146 | &return-value-dvb; | ||
| 1147 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1148 | align="char"> | ||
| 1149 | <para>EINVAL</para> | ||
| 1150 | </entry><entry | ||
| 1151 | align="char"> | ||
| 1152 | <para>type is not a valid or supported stream type.</para> | ||
| 1153 | </entry> | ||
| 1154 | </row></tbody></tgroup></informaltable> | ||
| 1155 | |||
| 1156 | </section><section id="AUDIO_SET_EXT_ID" | ||
| 1157 | role="subsection"><title>AUDIO_SET_EXT_ID</title> | ||
| 1158 | <para>DESCRIPTION | ||
| 1159 | </para> | ||
| 1160 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1161 | align="char"> | ||
| 1162 | <para>This ioctl can be used to set the extension id for MPEG streams in DVD | ||
| 1163 | playback. Only the first 3 bits are recognized.</para> | ||
| 1164 | </entry> | ||
| 1165 | </row></tbody></tgroup></informaltable> | ||
| 1166 | <para>SYNOPSIS | ||
| 1167 | </para> | ||
| 1168 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1169 | align="char"> | ||
| 1170 | <para>int ioctl(fd, int request = AUDIO_SET_EXT_ID, int | ||
| 1171 | id);</para> | ||
| 1172 | </entry> | ||
| 1173 | </row></tbody></tgroup></informaltable> | ||
| 1174 | <para>PARAMETERS | ||
| 1175 | </para> | ||
| 1176 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1177 | align="char"> | ||
| 1178 | <para>int fd</para> | ||
| 1179 | </entry><entry | ||
| 1180 | align="char"> | ||
| 1181 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1182 | </entry> | ||
| 1183 | </row><row><entry | ||
| 1184 | align="char"> | ||
| 1185 | <para>int request</para> | ||
| 1186 | </entry><entry | ||
| 1187 | align="char"> | ||
| 1188 | <para>Equals AUDIO_SET_EXT_ID for this command.</para> | ||
| 1189 | </entry> | ||
| 1190 | </row><row><entry | ||
| 1191 | align="char"> | ||
| 1192 | <para>int id</para> | ||
| 1193 | </entry><entry | ||
| 1194 | align="char"> | ||
| 1195 | <para>audio sub_stream_id</para> | ||
| 1196 | </entry> | ||
| 1197 | </row></tbody></tgroup></informaltable> | ||
| 1198 | &return-value-dvb; | ||
| 1199 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1200 | align="char"> | ||
| 1201 | <para>EINVAL</para> | ||
| 1202 | </entry><entry | ||
| 1203 | align="char"> | ||
| 1204 | <para>id is not a valid id.</para> | ||
| 1205 | </entry> | ||
| 1206 | </row></tbody></tgroup></informaltable> | ||
| 1207 | |||
| 1208 | </section><section id="AUDIO_SET_ATTRIBUTES" | ||
| 1209 | role="subsection"><title>AUDIO_SET_ATTRIBUTES</title> | ||
| 1210 | <para>DESCRIPTION | ||
| 1211 | </para> | ||
| 1212 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1213 | align="char"> | ||
| 1214 | <para>This ioctl is intended for DVD playback and allows you to set certain | ||
| 1215 | information about the audio stream.</para> | ||
| 1216 | </entry> | ||
| 1217 | </row></tbody></tgroup></informaltable> | ||
| 1218 | <para>SYNOPSIS | ||
| 1219 | </para> | ||
| 1220 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1221 | align="char"> | ||
| 1222 | <para>int ioctl(fd, int request = AUDIO_SET_ATTRIBUTES, | ||
| 1223 | audio_attributes_t attr );</para> | ||
| 1224 | </entry> | ||
| 1225 | </row></tbody></tgroup></informaltable> | ||
| 1226 | <para>PARAMETERS | ||
| 1227 | </para> | ||
| 1228 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1229 | align="char"> | ||
| 1230 | <para>int fd</para> | ||
| 1231 | </entry><entry | ||
| 1232 | align="char"> | ||
| 1233 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1234 | </entry> | ||
| 1235 | </row><row><entry | ||
| 1236 | align="char"> | ||
| 1237 | <para>int request</para> | ||
| 1238 | </entry><entry | ||
| 1239 | align="char"> | ||
| 1240 | <para>Equals AUDIO_SET_ATTRIBUTES for this command.</para> | ||
| 1241 | </entry> | ||
| 1242 | </row><row><entry | ||
| 1243 | align="char"> | ||
| 1244 | <para>audio_attributes_t | ||
| 1245 | attr</para> | ||
| 1246 | </entry><entry | ||
| 1247 | align="char"> | ||
| 1248 | <para>audio attributes according to section ??</para> | ||
| 1249 | </entry> | ||
| 1250 | </row></tbody></tgroup></informaltable> | ||
| 1251 | &return-value-dvb; | ||
| 1252 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1253 | align="char"> | ||
| 1254 | <para>EINVAL</para> | ||
| 1255 | </entry><entry | ||
| 1256 | align="char"> | ||
| 1257 | <para>attr is not a valid or supported attribute setting.</para> | ||
| 1258 | </entry> | ||
| 1259 | </row></tbody></tgroup></informaltable> | ||
| 1260 | |||
| 1261 | </section><section id="AUDIO_SET_KARAOKE" | ||
| 1262 | role="subsection"><title>AUDIO_SET_KARAOKE</title> | ||
| 1263 | <para>DESCRIPTION | ||
| 1264 | </para> | ||
| 1265 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1266 | align="char"> | ||
| 1267 | <para>This ioctl allows one to set the mixer settings for a karaoke DVD.</para> | ||
| 1268 | </entry> | ||
| 1269 | </row></tbody></tgroup></informaltable> | ||
| 1270 | <para>SYNOPSIS | ||
| 1271 | </para> | ||
| 1272 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1273 | align="char"> | ||
| 1274 | <para>int ioctl(fd, int request = AUDIO_SET_KARAOKE, | ||
| 1275 | audio_karaoke_t ⋆karaoke);</para> | ||
| 1276 | </entry> | ||
| 1277 | </row></tbody></tgroup></informaltable> | ||
| 1278 | <para>PARAMETERS | ||
| 1279 | </para> | ||
| 1280 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1281 | align="char"> | ||
| 1282 | <para>int fd</para> | ||
| 1283 | </entry><entry | ||
| 1284 | align="char"> | ||
| 1285 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1286 | </entry> | ||
| 1287 | </row><row><entry | ||
| 1288 | align="char"> | ||
| 1289 | <para>int request</para> | ||
| 1290 | </entry><entry | ||
| 1291 | align="char"> | ||
| 1292 | <para>Equals AUDIO_SET_KARAOKE for this | ||
| 1293 | command.</para> | ||
| 1294 | </entry> | ||
| 1295 | </row><row><entry | ||
| 1296 | align="char"> | ||
| 1297 | <para>audio_karaoke_t | ||
| 1298 | *karaoke</para> | ||
| 1299 | </entry><entry | ||
| 1300 | align="char"> | ||
| 1301 | <para>karaoke settings according to section ??.</para> | ||
| 1302 | </entry> | ||
| 1303 | </row></tbody></tgroup></informaltable> | ||
| 1304 | &return-value-dvb; | ||
| 1305 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1306 | align="char"> | ||
| 1307 | <para>EINVAL</para> | ||
| 1308 | </entry><entry | ||
| 1309 | align="char"> | ||
| 1310 | <para>karaoke is not a valid or supported karaoke setting.</para> | ||
| 1311 | </entry> | ||
| 1312 | </row></tbody></tgroup></informaltable> | ||
| 1313 | </section> | ||
| 1314 | </section> | ||
| @@ -1,582 +0,0 @@ | |||
| 1 | <title>DVB CA Device</title> | ||
| 2 | <para>The DVB CA device controls the conditional access hardware. It can be accessed through | ||
| 3 | <constant>/dev/dvb/adapter?/ca?</constant>. Data types and and ioctl definitions can be accessed by | ||
| 4 | including <constant>linux/dvb/ca.h</constant> in your application. | ||
| 5 | </para> | ||
| 6 | |||
| 7 | <section id="ca_data_types"> | ||
| 8 | <title>CA Data Types</title> | ||
| 9 | |||
| 10 | |||
| 11 | <section id="ca-slot-info"> | ||
| 12 | <title>ca_slot_info_t</title> | ||
| 13 | <programlisting> | ||
| 14 | typedef struct ca_slot_info { | ||
| 15 | int num; /⋆ slot number ⋆/ | ||
| 16 | |||
| 17 | int type; /⋆ CA interface this slot supports ⋆/ | ||
| 18 | #define CA_CI 1 /⋆ CI high level interface ⋆/ | ||
| 19 | #define CA_CI_LINK 2 /⋆ CI link layer level interface ⋆/ | ||
| 20 | #define CA_CI_PHYS 4 /⋆ CI physical layer level interface ⋆/ | ||
| 21 | #define CA_DESCR 8 /⋆ built-in descrambler ⋆/ | ||
| 22 | #define CA_SC 128 /⋆ simple smart card interface ⋆/ | ||
| 23 | |||
| 24 | unsigned int flags; | ||
| 25 | #define CA_CI_MODULE_PRESENT 1 /⋆ module (or card) inserted ⋆/ | ||
| 26 | #define CA_CI_MODULE_READY 2 | ||
| 27 | } ca_slot_info_t; | ||
| 28 | </programlisting> | ||
| 29 | |||
| 30 | </section> | ||
| 31 | <section id="ca-descr-info"> | ||
| 32 | <title>ca_descr_info_t</title> | ||
| 33 | <programlisting> | ||
| 34 | typedef struct ca_descr_info { | ||
| 35 | unsigned int num; /⋆ number of available descramblers (keys) ⋆/ | ||
| 36 | unsigned int type; /⋆ type of supported scrambling system ⋆/ | ||
| 37 | #define CA_ECD 1 | ||
| 38 | #define CA_NDS 2 | ||
| 39 | #define CA_DSS 4 | ||
| 40 | } ca_descr_info_t; | ||
| 41 | </programlisting> | ||
| 42 | |||
| 43 | </section> | ||
| 44 | <section id="ca-caps"> | ||
| 45 | <title>ca_caps_t</title> | ||
| 46 | <programlisting> | ||
| 47 | typedef struct ca_caps { | ||
| 48 | unsigned int slot_num; /⋆ total number of CA card and module slots ⋆/ | ||
| 49 | unsigned int slot_type; /⋆ OR of all supported types ⋆/ | ||
| 50 | unsigned int descr_num; /⋆ total number of descrambler slots (keys) ⋆/ | ||
| 51 | unsigned int descr_type;/⋆ OR of all supported types ⋆/ | ||
| 52 | } ca_cap_t; | ||
| 53 | </programlisting> | ||
| 54 | |||
| 55 | </section> | ||
| 56 | <section id="ca-msg"> | ||
| 57 | <title>ca_msg_t</title> | ||
| 58 | <programlisting> | ||
| 59 | /⋆ a message to/from a CI-CAM ⋆/ | ||
| 60 | typedef struct ca_msg { | ||
| 61 | unsigned int index; | ||
| 62 | unsigned int type; | ||
| 63 | unsigned int length; | ||
| 64 | unsigned char msg[256]; | ||
| 65 | } ca_msg_t; | ||
| 66 | </programlisting> | ||
| 67 | |||
| 68 | </section> | ||
| 69 | <section id="ca-descr"> | ||
| 70 | <title>ca_descr_t</title> | ||
| 71 | <programlisting> | ||
| 72 | typedef struct ca_descr { | ||
| 73 | unsigned int index; | ||
| 74 | unsigned int parity; | ||
| 75 | unsigned char cw[8]; | ||
| 76 | } ca_descr_t; | ||
| 77 | </programlisting> | ||
| 78 | </section> | ||
| 79 | |||
| 80 | <section id="ca-pid"> | ||
| 81 | <title>ca-pid</title> | ||
| 82 | <programlisting> | ||
| 83 | typedef struct ca_pid { | ||
| 84 | unsigned int pid; | ||
| 85 | int index; /⋆ -1 == disable⋆/ | ||
| 86 | } ca_pid_t; | ||
| 87 | </programlisting> | ||
| 88 | </section></section> | ||
| 89 | |||
| 90 | <section id="ca_function_calls"> | ||
| 91 | <title>CA Function Calls</title> | ||
| 92 | |||
| 93 | |||
| 94 | <section id="ca_fopen"> | ||
| 95 | <title>open()</title> | ||
| 96 | <para>DESCRIPTION | ||
| 97 | </para> | ||
| 98 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 99 | align="char"> | ||
| 100 | <para>This system call opens a named ca device (e.g. /dev/ost/ca) for subsequent use.</para> | ||
| 101 | <para>When an open() call has succeeded, the device will be ready for use. | ||
| 102 | The significance of blocking or non-blocking mode is described in the | ||
| 103 | documentation for functions where there is a difference. It does not affect the | ||
| 104 | semantics of the open() call itself. A device opened in blocking mode can later | ||
| 105 | be put into non-blocking mode (and vice versa) using the F_SETFL command | ||
| 106 | of the fcntl system call. This is a standard system call, documented in the Linux | ||
| 107 | manual page for fcntl. Only one user can open the CA Device in O_RDWR | ||
| 108 | mode. All other attempts to open the device in this mode will fail, and an error | ||
| 109 | code will be returned.</para> | ||
| 110 | </entry> | ||
| 111 | </row></tbody></tgroup></informaltable> | ||
| 112 | <para>SYNOPSIS | ||
| 113 | </para> | ||
| 114 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 115 | align="char"> | ||
| 116 | <para>int open(const char ⋆deviceName, int flags);</para> | ||
| 117 | </entry> | ||
| 118 | </row></tbody></tgroup></informaltable> | ||
| 119 | <para>PARAMETERS | ||
| 120 | </para> | ||
| 121 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 122 | align="char"> | ||
| 123 | <para>const char | ||
| 124 | *deviceName</para> | ||
| 125 | </entry><entry | ||
| 126 | align="char"> | ||
| 127 | <para>Name of specific video device.</para> | ||
| 128 | </entry> | ||
| 129 | </row><row><entry | ||
| 130 | align="char"> | ||
| 131 | <para>int flags</para> | ||
| 132 | </entry><entry | ||
| 133 | align="char"> | ||
| 134 | <para>A bit-wise OR of the following flags:</para> | ||
| 135 | </entry> | ||
| 136 | </row><row><entry | ||
| 137 | align="char"> | ||
| 138 | </entry><entry | ||
| 139 | align="char"> | ||
| 140 | <para>O_RDONLY read-only access</para> | ||
| 141 | </entry> | ||
| 142 | </row><row><entry | ||
| 143 | align="char"> | ||
| 144 | </entry><entry | ||
| 145 | align="char"> | ||
| 146 | <para>O_RDWR read/write access</para> | ||
| 147 | </entry> | ||
| 148 | </row><row><entry | ||
| 149 | align="char"> | ||
| 150 | </entry><entry | ||
| 151 | align="char"> | ||
| 152 | <para>O_NONBLOCK open in non-blocking mode</para> | ||
| 153 | </entry> | ||
| 154 | </row><row><entry | ||
| 155 | align="char"> | ||
| 156 | </entry><entry | ||
| 157 | align="char"> | ||
| 158 | <para>(blocking mode is the default)</para> | ||
| 159 | </entry> | ||
| 160 | </row></tbody></tgroup></informaltable> | ||
| 161 | <para>RETURN VALUE</para> | ||
| 162 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 163 | align="char"> | ||
| 164 | <para>ENODEV</para> | ||
| 165 | </entry><entry | ||
| 166 | align="char"> | ||
| 167 | <para>Device driver not loaded/available.</para> | ||
| 168 | </entry> | ||
| 169 | </row><row><entry | ||
| 170 | align="char"> | ||
| 171 | <para>EINTERNAL</para> | ||
| 172 | </entry><entry | ||
| 173 | align="char"> | ||
| 174 | <para>Internal error.</para> | ||
| 175 | </entry> | ||
| 176 | </row><row><entry | ||
| 177 | align="char"> | ||
| 178 | <para>EBUSY</para> | ||
| 179 | </entry><entry | ||
| 180 | align="char"> | ||
| 181 | <para>Device or resource busy.</para> | ||
| 182 | </entry> | ||
| 183 | </row><row><entry | ||
| 184 | align="char"> | ||
| 185 | <para>EINVAL</para> | ||
| 186 | </entry><entry | ||
| 187 | align="char"> | ||
| 188 | <para>Invalid argument.</para> | ||
| 189 | </entry> | ||
| 190 | </row></tbody></tgroup></informaltable> | ||
| 191 | |||
| 192 | </section> | ||
| 193 | <section id="ca_fclose"> | ||
| 194 | <title>close()</title> | ||
| 195 | <para>DESCRIPTION | ||
| 196 | </para> | ||
| 197 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 198 | align="char"> | ||
| 199 | <para>This system call closes a previously opened audio device.</para> | ||
| 200 | </entry> | ||
| 201 | </row></tbody></tgroup></informaltable> | ||
| 202 | <para>SYNOPSIS | ||
| 203 | </para> | ||
| 204 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 205 | align="char"> | ||
| 206 | <para>int close(int fd);</para> | ||
| 207 | </entry> | ||
| 208 | </row></tbody></tgroup></informaltable> | ||
| 209 | <para>PARAMETERS | ||
| 210 | </para> | ||
| 211 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 212 | align="char"> | ||
| 213 | <para>int fd</para> | ||
| 214 | </entry><entry | ||
| 215 | align="char"> | ||
| 216 | <para>File descriptor returned by a previous call to open().</para> | ||
| 217 | </entry> | ||
| 218 | </row></tbody></tgroup></informaltable> | ||
| 219 | <para>RETURN VALUE</para> | ||
| 220 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 221 | align="char"> | ||
| 222 | <para>EBADF</para> | ||
| 223 | </entry><entry | ||
| 224 | align="char"> | ||
| 225 | <para>fd is not a valid open file descriptor.</para> | ||
| 226 | </entry> | ||
| 227 | </row></tbody></tgroup></informaltable> | ||
| 228 | </section> | ||
| 229 | |||
| 230 | <section id="CA_RESET" | ||
| 231 | role="subsection"><title>CA_RESET</title> | ||
| 232 | <para>DESCRIPTION | ||
| 233 | </para> | ||
| 234 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 235 | align="char"> | ||
| 236 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 237 | </entry> | ||
| 238 | </row></tbody></tgroup></informaltable> | ||
| 239 | <para>SYNOPSIS | ||
| 240 | </para> | ||
| 241 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 242 | align="char"> | ||
| 243 | <para>int ioctl(fd, int request = CA_RESET); | ||
| 244 | </para> | ||
| 245 | </entry> | ||
| 246 | </row></tbody></tgroup></informaltable> | ||
| 247 | <para>PARAMETERS | ||
| 248 | </para> | ||
| 249 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 250 | align="char"> | ||
| 251 | <para>int fd</para> | ||
| 252 | </entry><entry | ||
| 253 | align="char"> | ||
| 254 | <para>File descriptor returned by a previous call to open().</para> | ||
| 255 | </entry> | ||
| 256 | </row><row><entry | ||
| 257 | align="char"> | ||
| 258 | <para>int request</para> | ||
| 259 | </entry><entry | ||
| 260 | align="char"> | ||
| 261 | <para>Equals CA_RESET for this command.</para> | ||
| 262 | </entry> | ||
| 263 | </row></tbody></tgroup></informaltable> | ||
| 264 | &return-value-dvb; | ||
| 265 | </section> | ||
| 266 | |||
| 267 | <section id="CA_GET_CAP" | ||
| 268 | role="subsection"><title>CA_GET_CAP</title> | ||
| 269 | <para>DESCRIPTION | ||
| 270 | </para> | ||
| 271 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 272 | align="char"> | ||
| 273 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 274 | </entry> | ||
| 275 | </row></tbody></tgroup></informaltable> | ||
| 276 | <para>SYNOPSIS | ||
| 277 | </para> | ||
| 278 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 279 | align="char"> | ||
| 280 | <para>int ioctl(fd, int request = CA_GET_CAP, | ||
| 281 | ca_caps_t *);</para> | ||
| 282 | </entry> | ||
| 283 | </row></tbody></tgroup></informaltable> | ||
| 284 | <para>PARAMETERS | ||
| 285 | </para> | ||
| 286 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 287 | align="char"> | ||
| 288 | <para>int fd</para> | ||
| 289 | </entry><entry | ||
| 290 | align="char"> | ||
| 291 | <para>File descriptor returned by a previous call to open().</para> | ||
| 292 | </entry> | ||
| 293 | </row><row><entry | ||
| 294 | align="char"> | ||
| 295 | <para>int request</para> | ||
| 296 | </entry><entry | ||
| 297 | align="char"> | ||
| 298 | <para>Equals CA_GET_CAP for this command.</para> | ||
| 299 | </entry> | ||
| 300 | </row><row><entry | ||
| 301 | align="char"> | ||
| 302 | <para>ca_caps_t * | ||
| 303 | </para> | ||
| 304 | </entry><entry | ||
| 305 | align="char"> | ||
| 306 | <para>Undocumented.</para> | ||
| 307 | </entry> | ||
| 308 | </row></tbody></tgroup></informaltable> | ||
| 309 | &return-value-dvb; | ||
| 310 | </section> | ||
| 311 | |||
| 312 | <section id="CA_GET_SLOT_INFO" | ||
| 313 | role="subsection"><title>CA_GET_SLOT_INFO</title> | ||
| 314 | <para>DESCRIPTION | ||
| 315 | </para> | ||
| 316 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 317 | align="char"> | ||
| 318 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 319 | </entry> | ||
| 320 | </row></tbody></tgroup></informaltable> | ||
| 321 | <para>SYNOPSIS | ||
| 322 | </para> | ||
| 323 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 324 | align="char"> | ||
| 325 | <para>int ioctl(fd, int request = CA_GET_SLOT_INFO, | ||
| 326 | ca_slot_info_t *);</para> | ||
| 327 | </entry> | ||
| 328 | </row></tbody></tgroup></informaltable> | ||
| 329 | <para>PARAMETERS | ||
| 330 | </para> | ||
| 331 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 332 | align="char"> | ||
| 333 | <para>int fd</para> | ||
| 334 | </entry><entry | ||
| 335 | align="char"> | ||
| 336 | <para>File descriptor returned by a previous call to open().</para> | ||
| 337 | </entry> | ||
| 338 | </row><row><entry | ||
| 339 | align="char"> | ||
| 340 | <para>int request</para> | ||
| 341 | </entry><entry | ||
| 342 | align="char"> | ||
| 343 | <para>Equals CA_GET_SLOT_INFO for this command.</para> | ||
| 344 | </entry> | ||
| 345 | </row><row><entry | ||
| 346 | align="char"> | ||
| 347 | <para>ca_slot_info_t * | ||
| 348 | </para> | ||
| 349 | </entry><entry | ||
| 350 | align="char"> | ||
| 351 | <para>Undocumented.</para> | ||
| 352 | </entry> | ||
| 353 | </row></tbody></tgroup></informaltable> | ||
| 354 | &return-value-dvb; | ||
| 355 | </section> | ||
| 356 | |||
| 357 | <section id="CA_GET_DESCR_INFO" | ||
| 358 | role="subsection"><title>CA_GET_DESCR_INFO</title> | ||
| 359 | <para>DESCRIPTION | ||
| 360 | </para> | ||
| 361 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 362 | align="char"> | ||
| 363 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 364 | </entry> | ||
| 365 | </row></tbody></tgroup></informaltable> | ||
| 366 | <para>SYNOPSIS | ||
| 367 | </para> | ||
| 368 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 369 | align="char"> | ||
| 370 | <para>int ioctl(fd, int request = CA_GET_DESCR_INFO, | ||
| 371 | ca_descr_info_t *);</para> | ||
| 372 | </entry> | ||
| 373 | </row></tbody></tgroup></informaltable> | ||
| 374 | <para>PARAMETERS | ||
| 375 | </para> | ||
| 376 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 377 | align="char"> | ||
| 378 | <para>int fd</para> | ||
| 379 | </entry><entry | ||
| 380 | align="char"> | ||
| 381 | <para>File descriptor returned by a previous call to open().</para> | ||
| 382 | </entry> | ||
| 383 | </row><row><entry | ||
| 384 | align="char"> | ||
| 385 | <para>int request</para> | ||
| 386 | </entry><entry | ||
| 387 | align="char"> | ||
| 388 | <para>Equals CA_GET_DESCR_INFO for this command.</para> | ||
| 389 | </entry> | ||
| 390 | </row><row><entry | ||
| 391 | align="char"> | ||
| 392 | <para>ca_descr_info_t * | ||
| 393 | </para> | ||
| 394 | </entry><entry | ||
| 395 | align="char"> | ||
| 396 | <para>Undocumented.</para> | ||
| 397 | </entry> | ||
| 398 | </row></tbody></tgroup></informaltable> | ||
| 399 | &return-value-dvb; | ||
| 400 | </section> | ||
| 401 | |||
| 402 | <section id="CA_GET_MSG" | ||
| 403 | role="subsection"><title>CA_GET_MSG</title> | ||
| 404 | <para>DESCRIPTION | ||
| 405 | </para> | ||
| 406 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 407 | align="char"> | ||
| 408 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 409 | </entry> | ||
| 410 | </row></tbody></tgroup></informaltable> | ||
| 411 | <para>SYNOPSIS | ||
| 412 | </para> | ||
| 413 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 414 | align="char"> | ||
| 415 | <para>int ioctl(fd, int request = CA_GET_MSG, | ||
| 416 | ca_msg_t *);</para> | ||
| 417 | </entry> | ||
| 418 | </row></tbody></tgroup></informaltable> | ||
| 419 | <para>PARAMETERS | ||
| 420 | </para> | ||
| 421 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 422 | align="char"> | ||
| 423 | <para>int fd</para> | ||
| 424 | </entry><entry | ||
| 425 | align="char"> | ||
| 426 | <para>File descriptor returned by a previous call to open().</para> | ||
| 427 | </entry> | ||
| 428 | </row><row><entry | ||
| 429 | align="char"> | ||
| 430 | <para>int request</para> | ||
| 431 | </entry><entry | ||
| 432 | align="char"> | ||
| 433 | <para>Equals CA_GET_MSG for this command.</para> | ||
| 434 | </entry> | ||
| 435 | </row><row><entry | ||
| 436 | align="char"> | ||
| 437 | <para>ca_msg_t * | ||
| 438 | </para> | ||
| 439 | </entry><entry | ||
| 440 | align="char"> | ||
| 441 | <para>Undocumented.</para> | ||
| 442 | </entry> | ||
| 443 | </row></tbody></tgroup></informaltable> | ||
| 444 | &return-value-dvb; | ||
| 445 | </section> | ||
| 446 | |||
| 447 | <section id="CA_SEND_MSG" | ||
| 448 | role="subsection"><title>CA_SEND_MSG</title> | ||
| 449 | <para>DESCRIPTION | ||
| 450 | </para> | ||
| 451 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 452 | align="char"> | ||
| 453 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 454 | </entry> | ||
| 455 | </row></tbody></tgroup></informaltable> | ||
| 456 | <para>SYNOPSIS | ||
| 457 | </para> | ||
| 458 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 459 | align="char"> | ||
| 460 | <para>int ioctl(fd, int request = CA_SEND_MSG, | ||
| 461 | ca_msg_t *);</para> | ||
| 462 | </entry> | ||
| 463 | </row></tbody></tgroup></informaltable> | ||
| 464 | <para>PARAMETERS | ||
| 465 | </para> | ||
| 466 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 467 | align="char"> | ||
| 468 | <para>int fd</para> | ||
| 469 | </entry><entry | ||
| 470 | align="char"> | ||
| 471 | <para>File descriptor returned by a previous call to open().</para> | ||
| 472 | </entry> | ||
| 473 | </row><row><entry | ||
| 474 | align="char"> | ||
| 475 | <para>int request</para> | ||
| 476 | </entry><entry | ||
| 477 | align="char"> | ||
| 478 | <para>Equals CA_SEND_MSG for this command.</para> | ||
| 479 | </entry> | ||
| 480 | </row><row><entry | ||
| 481 | align="char"> | ||
| 482 | <para>ca_msg_t * | ||
| 483 | </para> | ||
| 484 | </entry><entry | ||
| 485 | align="char"> | ||
| 486 | <para>Undocumented.</para> | ||
| 487 | </entry> | ||
| 488 | </row></tbody></tgroup></informaltable> | ||
| 489 | &return-value-dvb; | ||
| 490 | </section> | ||
| 491 | |||
| 492 | <section id="CA_SET_DESCR" | ||
| 493 | role="subsection"><title>CA_SET_DESCR</title> | ||
| 494 | <para>DESCRIPTION | ||
| 495 | </para> | ||
| 496 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 497 | align="char"> | ||
| 498 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 499 | </entry> | ||
| 500 | </row></tbody></tgroup></informaltable> | ||
| 501 | <para>SYNOPSIS | ||
| 502 | </para> | ||
| 503 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 504 | align="char"> | ||
| 505 | <para>int ioctl(fd, int request = CA_SET_DESCR, | ||
| 506 | ca_descr_t *);</para> | ||
| 507 | </entry> | ||
| 508 | </row></tbody></tgroup></informaltable> | ||
| 509 | <para>PARAMETERS | ||
| 510 | </para> | ||
| 511 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 512 | align="char"> | ||
| 513 | <para>int fd</para> | ||
| 514 | </entry><entry | ||
| 515 | align="char"> | ||
| 516 | <para>File descriptor returned by a previous call to open().</para> | ||
| 517 | </entry> | ||
| 518 | </row><row><entry | ||
| 519 | align="char"> | ||
| 520 | <para>int request</para> | ||
| 521 | </entry><entry | ||
| 522 | align="char"> | ||
| 523 | <para>Equals CA_SET_DESCR for this command.</para> | ||
| 524 | </entry> | ||
| 525 | </row><row><entry | ||
| 526 | align="char"> | ||
| 527 | <para>ca_descr_t * | ||
| 528 | </para> | ||
| 529 | </entry><entry | ||
| 530 | align="char"> | ||
| 531 | <para>Undocumented.</para> | ||
| 532 | </entry> | ||
| 533 | </row></tbody></tgroup></informaltable> | ||
| 534 | &return-value-dvb; | ||
| 535 | </section> | ||
| 536 | |||
| 537 | <section id="CA_SET_PID" | ||
| 538 | role="subsection"><title>CA_SET_PID</title> | ||
| 539 | <para>DESCRIPTION | ||
| 540 | </para> | ||
| 541 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 542 | align="char"> | ||
| 543 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 544 | </entry> | ||
| 545 | </row></tbody></tgroup></informaltable> | ||
| 546 | <para>SYNOPSIS | ||
| 547 | </para> | ||
| 548 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 549 | align="char"> | ||
| 550 | <para>int ioctl(fd, int request = CA_SET_PID, | ||
| 551 | ca_pid_t *);</para> | ||
| 552 | </entry> | ||
| 553 | </row></tbody></tgroup></informaltable> | ||
| 554 | <para>PARAMETERS | ||
| 555 | </para> | ||
| 556 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 557 | align="char"> | ||
| 558 | <para>int fd</para> | ||
| 559 | </entry><entry | ||
| 560 | align="char"> | ||
| 561 | <para>File descriptor returned by a previous call to open().</para> | ||
| 562 | </entry> | ||
| 563 | </row><row><entry | ||
| 564 | align="char"> | ||
| 565 | <para>int request</para> | ||
| 566 | </entry><entry | ||
| 567 | align="char"> | ||
| 568 | <para>Equals CA_SET_PID for this command.</para> | ||
| 569 | </entry> | ||
| 570 | </row><row><entry | ||
| 571 | align="char"> | ||
| 572 | <para>ca_pid_t * | ||
| 573 | </para> | ||
| 574 | </entry><entry | ||
| 575 | align="char"> | ||
| 576 | <para>Undocumented.</para> | ||
| 577 | </entry> | ||
| 578 | </row></tbody></tgroup></informaltable> | ||
| 579 | &return-value-dvb; | ||
| 580 | </section> | ||
| 581 | |||
| 582 | </section> | ||
| @@ -1,1162 +0,0 @@ | |||
| 1 | <title>DVB Demux Device</title> | ||
| 2 | |||
| 3 | <para>The DVB demux device controls the filters of the DVB hardware/software. It can be | ||
| 4 | accessed through <constant>/dev/adapter?/demux?</constant>. Data types and and ioctl definitions can be | ||
| 5 | accessed by including <constant>linux/dvb/dmx.h</constant> in your application. | ||
| 6 | </para> | ||
| 7 | <section id="dmx_types"> | ||
| 8 | <title>Demux Data Types</title> | ||
| 9 | |||
| 10 | <section id="dmx-output-t"> | ||
| 11 | <title>Output for the demux</title> | ||
| 12 | |||
| 13 | <table pgwide="1" frame="none" id="dmx-output"> | ||
| 14 | <title>enum dmx_output</title> | ||
| 15 | <tgroup cols="2"> | ||
| 16 | &cs-def; | ||
| 17 | <thead> | ||
| 18 | <row> | ||
| 19 | <entry>ID</entry> | ||
| 20 | <entry>Description</entry> | ||
| 21 | </row> | ||
| 22 | </thead> | ||
| 23 | <tbody valign="top"> | ||
| 24 | <row> | ||
| 25 | <entry align="char" id="DMX-OUT-DECODER">DMX_OUT_DECODER</entry> | ||
| 26 | <entry>Streaming directly to decoder.</entry> | ||
| 27 | </row><row> | ||
| 28 | <entry align="char" id="DMX-OUT-TAP">DMX_OUT_TAP</entry> | ||
| 29 | <entry>Output going to a memory buffer (to be retrieved via the | ||
| 30 | read command). Delivers the stream output to the demux | ||
| 31 | device on which the ioctl is called.</entry> | ||
| 32 | </row><row> | ||
| 33 | <entry align="char" id="DMX-OUT-TS-TAP">DMX_OUT_TS_TAP</entry> | ||
| 34 | <entry>Output multiplexed into a new TS (to be retrieved by | ||
| 35 | reading from the logical DVR device). Routes output to the | ||
| 36 | logical DVR device <constant>/dev/dvb/adapter?/dvr?</constant>, | ||
| 37 | which delivers a TS multiplexed from all filters for which | ||
| 38 | <constant>DMX_OUT_TS_TAP</constant> was specified.</entry> | ||
| 39 | </row><row> | ||
| 40 | <entry align="char" id="DMX-OUT-TSDEMUX-TAP">DMX_OUT_TSDEMUX_TAP</entry> | ||
| 41 | <entry>Like &DMX-OUT-TS-TAP; but retrieved from the DMX | ||
| 42 | device.</entry> | ||
| 43 | </row> | ||
| 44 | </tbody> | ||
| 45 | </tgroup> | ||
| 46 | </table> | ||
| 47 | |||
| 48 | </section> | ||
| 49 | |||
| 50 | <section id="dmx-input-t"> | ||
| 51 | <title>dmx_input_t</title> | ||
| 52 | <programlisting> | ||
| 53 | typedef enum | ||
| 54 | { | ||
| 55 | DMX_IN_FRONTEND, /⋆ Input from a front-end device. ⋆/ | ||
| 56 | DMX_IN_DVR /⋆ Input from the logical DVR device. ⋆/ | ||
| 57 | } dmx_input_t; | ||
| 58 | </programlisting> | ||
| 59 | </section> | ||
| 60 | |||
| 61 | <section id="dmx-pes-type-t"> | ||
| 62 | <title>dmx_pes_type_t</title> | ||
| 63 | <programlisting> | ||
| 64 | typedef enum | ||
| 65 | { | ||
| 66 | DMX_PES_AUDIO0, | ||
| 67 | DMX_PES_VIDEO0, | ||
| 68 | DMX_PES_TELETEXT0, | ||
| 69 | DMX_PES_SUBTITLE0, | ||
| 70 | DMX_PES_PCR0, | ||
| 71 | |||
| 72 | DMX_PES_AUDIO1, | ||
| 73 | DMX_PES_VIDEO1, | ||
| 74 | DMX_PES_TELETEXT1, | ||
| 75 | DMX_PES_SUBTITLE1, | ||
| 76 | DMX_PES_PCR1, | ||
| 77 | |||
| 78 | DMX_PES_AUDIO2, | ||
| 79 | DMX_PES_VIDEO2, | ||
| 80 | DMX_PES_TELETEXT2, | ||
| 81 | DMX_PES_SUBTITLE2, | ||
| 82 | DMX_PES_PCR2, | ||
| 83 | |||
| 84 | DMX_PES_AUDIO3, | ||
| 85 | DMX_PES_VIDEO3, | ||
| 86 | DMX_PES_TELETEXT3, | ||
| 87 | DMX_PES_SUBTITLE3, | ||
| 88 | DMX_PES_PCR3, | ||
| 89 | |||
| 90 | DMX_PES_OTHER | ||
| 91 | } dmx_pes_type_t; | ||
| 92 | </programlisting> | ||
| 93 | </section> | ||
| 94 | |||
| 95 | <section id="dmx-filter"> | ||
| 96 | <title>struct dmx_filter</title> | ||
| 97 | <programlisting> | ||
| 98 | typedef struct dmx_filter | ||
| 99 | { | ||
| 100 | __u8 filter[DMX_FILTER_SIZE]; | ||
| 101 | __u8 mask[DMX_FILTER_SIZE]; | ||
| 102 | __u8 mode[DMX_FILTER_SIZE]; | ||
| 103 | } dmx_filter_t; | ||
| 104 | </programlisting> | ||
| 105 | </section> | ||
| 106 | |||
| 107 | <section id="dmx-sct-filter-params"> | ||
| 108 | <title>struct dmx_sct_filter_params</title> | ||
| 109 | <programlisting> | ||
| 110 | struct dmx_sct_filter_params | ||
| 111 | { | ||
| 112 | __u16 pid; | ||
| 113 | dmx_filter_t filter; | ||
| 114 | __u32 timeout; | ||
| 115 | __u32 flags; | ||
| 116 | #define DMX_CHECK_CRC 1 | ||
| 117 | #define DMX_ONESHOT 2 | ||
| 118 | #define DMX_IMMEDIATE_START 4 | ||
| 119 | #define DMX_KERNEL_CLIENT 0x8000 | ||
| 120 | }; | ||
| 121 | </programlisting> | ||
| 122 | </section> | ||
| 123 | |||
| 124 | <section id="dmx-pes-filter-params"> | ||
| 125 | <title>struct dmx_pes_filter_params</title> | ||
| 126 | <programlisting> | ||
| 127 | struct dmx_pes_filter_params | ||
| 128 | { | ||
| 129 | __u16 pid; | ||
| 130 | dmx_input_t input; | ||
| 131 | dmx_output_t output; | ||
| 132 | dmx_pes_type_t pes_type; | ||
| 133 | __u32 flags; | ||
| 134 | }; | ||
| 135 | </programlisting> | ||
| 136 | </section> | ||
| 137 | |||
| 138 | <section id="dmx-event"> | ||
| 139 | <title>struct dmx_event</title> | ||
| 140 | <programlisting> | ||
| 141 | struct dmx_event | ||
| 142 | { | ||
| 143 | dmx_event_t event; | ||
| 144 | time_t timeStamp; | ||
| 145 | union | ||
| 146 | { | ||
| 147 | dmx_scrambling_status_t scrambling; | ||
| 148 | } u; | ||
| 149 | }; | ||
| 150 | </programlisting> | ||
| 151 | </section> | ||
| 152 | |||
| 153 | <section id="dmx-stc"> | ||
| 154 | <title>struct dmx_stc</title> | ||
| 155 | <programlisting> | ||
| 156 | struct dmx_stc { | ||
| 157 | unsigned int num; /⋆ input : which STC? 0..N ⋆/ | ||
| 158 | unsigned int base; /⋆ output: divisor for stc to get 90 kHz clock ⋆/ | ||
| 159 | __u64 stc; /⋆ output: stc in 'base'⋆90 kHz units ⋆/ | ||
| 160 | }; | ||
| 161 | </programlisting> | ||
| 162 | </section> | ||
| 163 | |||
| 164 | <section id="dmx-caps"> | ||
| 165 | <title>struct dmx_caps</title> | ||
| 166 | <programlisting> | ||
| 167 | typedef struct dmx_caps { | ||
| 168 | __u32 caps; | ||
| 169 | int num_decoders; | ||
| 170 | } dmx_caps_t; | ||
| 171 | </programlisting> | ||
| 172 | </section> | ||
| 173 | |||
| 174 | <section id="dmx-source-t"> | ||
| 175 | <title>enum dmx_source_t</title> | ||
| 176 | <programlisting> | ||
| 177 | typedef enum { | ||
| 178 | DMX_SOURCE_FRONT0 = 0, | ||
| 179 | DMX_SOURCE_FRONT1, | ||
| 180 | DMX_SOURCE_FRONT2, | ||
| 181 | DMX_SOURCE_FRONT3, | ||
| 182 | DMX_SOURCE_DVR0 = 16, | ||
| 183 | DMX_SOURCE_DVR1, | ||
| 184 | DMX_SOURCE_DVR2, | ||
| 185 | DMX_SOURCE_DVR3 | ||
| 186 | } dmx_source_t; | ||
| 187 | </programlisting> | ||
| 188 | </section> | ||
| 189 | |||
| 190 | </section> | ||
| 191 | <section id="dmx_fcalls"> | ||
| 192 | <title>Demux Function Calls</title> | ||
| 193 | |||
| 194 | <section id="dmx_fopen"> | ||
| 195 | <title>open()</title> | ||
| 196 | <para>DESCRIPTION | ||
| 197 | </para> | ||
| 198 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 199 | align="char"> | ||
| 200 | <para>This system call, used with a device name of /dev/dvb/adapter0/demux0, | ||
| 201 | allocates a new filter and returns a handle which can be used for subsequent | ||
| 202 | control of that filter. This call has to be made for each filter to be used, i.e. every | ||
| 203 | returned file descriptor is a reference to a single filter. /dev/dvb/adapter0/dvr0 | ||
| 204 | is a logical device to be used for retrieving Transport Streams for digital | ||
| 205 | video recording. When reading from this device a transport stream containing | ||
| 206 | the packets from all PES filters set in the corresponding demux device | ||
| 207 | (/dev/dvb/adapter0/demux0) having the output set to DMX_OUT_TS_TAP. A | ||
| 208 | recorded Transport Stream is replayed by writing to this device. </para> | ||
| 209 | <para>The significance of blocking or non-blocking mode is described in the | ||
| 210 | documentation for functions where there is a difference. It does not affect the | ||
| 211 | semantics of the open() call itself. A device opened in blocking mode can later | ||
| 212 | be put into non-blocking mode (and vice versa) using the F_SETFL command | ||
| 213 | of the fcntl system call.</para> | ||
| 214 | </entry> | ||
| 215 | </row></tbody></tgroup></informaltable> | ||
| 216 | <para>SYNOPSIS | ||
| 217 | </para> | ||
| 218 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 219 | align="char"> | ||
| 220 | <para>int open(const char ⋆deviceName, int flags);</para> | ||
| 221 | </entry> | ||
| 222 | </row></tbody></tgroup></informaltable> | ||
| 223 | <para>PARAMETERS | ||
| 224 | </para> | ||
| 225 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 226 | align="char"> | ||
| 227 | <para>const char | ||
| 228 | *deviceName</para> | ||
| 229 | </entry><entry | ||
| 230 | align="char"> | ||
| 231 | <para>Name of demux device.</para> | ||
| 232 | </entry> | ||
| 233 | </row><row><entry | ||
| 234 | align="char"> | ||
| 235 | <para>int flags</para> | ||
| 236 | </entry><entry | ||
| 237 | align="char"> | ||
| 238 | <para>A bit-wise OR of the following flags:</para> | ||
| 239 | </entry> | ||
| 240 | </row><row><entry | ||
| 241 | align="char"> | ||
| 242 | </entry><entry | ||
| 243 | align="char"> | ||
| 244 | <para>O_RDWR read/write access</para> | ||
| 245 | </entry> | ||
| 246 | </row><row><entry | ||
| 247 | align="char"> | ||
| 248 | </entry><entry | ||
| 249 | align="char"> | ||
| 250 | <para>O_NONBLOCK open in non-blocking mode</para> | ||
| 251 | </entry> | ||
| 252 | </row><row><entry | ||
| 253 | align="char"> | ||
| 254 | </entry><entry | ||
| 255 | align="char"> | ||
| 256 | <para>(blocking mode is the default)</para> | ||
| 257 | </entry> | ||
| 258 | </row></tbody></tgroup></informaltable> | ||
| 259 | <para>RETURN VALUE</para> | ||
| 260 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 261 | align="char"> | ||
| 262 | <para>ENODEV</para> | ||
| 263 | </entry><entry | ||
| 264 | align="char"> | ||
| 265 | <para>Device driver not loaded/available.</para> | ||
| 266 | </entry> | ||
| 267 | </row><row><entry | ||
| 268 | align="char"> | ||
| 269 | <para>EINVAL</para> | ||
| 270 | </entry><entry | ||
| 271 | align="char"> | ||
| 272 | <para>Invalid argument.</para> | ||
| 273 | </entry> | ||
| 274 | </row><row><entry | ||
| 275 | align="char"> | ||
| 276 | <para>EMFILE</para> | ||
| 277 | </entry><entry | ||
| 278 | align="char"> | ||
| 279 | <para>“Too many open files”, i.e. no more filters available.</para> | ||
| 280 | </entry> | ||
| 281 | </row><row><entry | ||
| 282 | align="char"> | ||
| 283 | <para>ENOMEM</para> | ||
| 284 | </entry><entry | ||
| 285 | align="char"> | ||
| 286 | <para>The driver failed to allocate enough memory.</para> | ||
| 287 | </entry> | ||
| 288 | </row></tbody></tgroup></informaltable> | ||
| 289 | </section> | ||
| 290 | |||
| 291 | <section id="dmx_fclose"> | ||
| 292 | <title>close()</title> | ||
| 293 | <para>DESCRIPTION | ||
| 294 | </para> | ||
| 295 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 296 | align="char"> | ||
| 297 | <para>This system call deactivates and deallocates a filter that was previously | ||
| 298 | allocated via the open() call.</para> | ||
| 299 | </entry> | ||
| 300 | </row></tbody></tgroup></informaltable> | ||
| 301 | <para>SYNOPSIS | ||
| 302 | </para> | ||
| 303 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 304 | align="char"> | ||
| 305 | <para>int close(int fd);</para> | ||
| 306 | </entry> | ||
| 307 | </row></tbody></tgroup></informaltable> | ||
| 308 | <para>PARAMETERS | ||
| 309 | </para> | ||
| 310 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 311 | align="char"> | ||
| 312 | <para>int fd</para> | ||
| 313 | </entry><entry | ||
| 314 | align="char"> | ||
| 315 | <para>File descriptor returned by a previous call to open().</para> | ||
| 316 | </entry> | ||
| 317 | </row></tbody></tgroup></informaltable> | ||
| 318 | <para>RETURN VALUE</para> | ||
| 319 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 320 | align="char"> | ||
| 321 | <para>EBADF</para> | ||
| 322 | </entry><entry | ||
| 323 | align="char"> | ||
| 324 | <para>fd is not a valid open file descriptor.</para> | ||
| 325 | </entry> | ||
| 326 | </row></tbody></tgroup></informaltable> | ||
| 327 | </section> | ||
| 328 | |||
| 329 | <section id="dmx_fread"> | ||
| 330 | <title>read()</title> | ||
| 331 | <para>DESCRIPTION | ||
| 332 | </para> | ||
| 333 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 334 | align="char"> | ||
| 335 | <para>This system call returns filtered data, which might be section or PES data. The | ||
| 336 | filtered data is transferred from the driver’s internal circular buffer to buf. The | ||
| 337 | maximum amount of data to be transferred is implied by count.</para> | ||
| 338 | </entry> | ||
| 339 | </row><row><entry | ||
| 340 | align="char"> | ||
| 341 | <para>When returning section data the driver always tries to return a complete single | ||
| 342 | section (even though buf would provide buffer space for more data). If the size | ||
| 343 | of the buffer is smaller than the section as much as possible will be returned, | ||
| 344 | and the remaining data will be provided in subsequent calls.</para> | ||
| 345 | </entry> | ||
| 346 | </row><row><entry | ||
| 347 | align="char"> | ||
| 348 | <para>The size of the internal buffer is 2 * 4096 bytes (the size of two maximum | ||
| 349 | sized sections) by default. The size of this buffer may be changed by using the | ||
| 350 | DMX_SET_BUFFER_SIZE function. If the buffer is not large enough, or if | ||
| 351 | the read operations are not performed fast enough, this may result in a buffer | ||
| 352 | overflow error. In this case EOVERFLOW will be returned, and the circular | ||
| 353 | buffer will be emptied. This call is blocking if there is no data to return, i.e. the | ||
| 354 | process will be put to sleep waiting for data, unless the O_NONBLOCK flag | ||
| 355 | is specified.</para> | ||
| 356 | </entry> | ||
| 357 | </row><row><entry | ||
| 358 | align="char"> | ||
| 359 | <para>Note that in order to be able to read, the filtering process has to be started | ||
| 360 | by defining either a section or a PES filter by means of the ioctl functions, | ||
| 361 | and then starting the filtering process via the DMX_START ioctl function | ||
| 362 | or by setting the DMX_IMMEDIATE_START flag. If the reading is done | ||
| 363 | from a logical DVR demux device, the data will constitute a Transport Stream | ||
| 364 | including the packets from all PES filters in the corresponding demux device | ||
| 365 | /dev/dvb/adapter0/demux0 having the output set to DMX_OUT_TS_TAP.</para> | ||
| 366 | </entry> | ||
| 367 | </row></tbody></tgroup></informaltable> | ||
| 368 | <para>SYNOPSIS | ||
| 369 | </para> | ||
| 370 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 371 | align="char"> | ||
| 372 | <para>size_t read(int fd, void ⋆buf, size_t count);</para> | ||
| 373 | </entry> | ||
| 374 | </row></tbody></tgroup></informaltable> | ||
| 375 | <para>PARAMETERS | ||
| 376 | </para> | ||
| 377 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 378 | align="char"> | ||
| 379 | <para>int fd</para> | ||
| 380 | </entry><entry | ||
| 381 | align="char"> | ||
| 382 | <para>File descriptor returned by a previous call to open().</para> | ||
| 383 | </entry> | ||
| 384 | </row><row><entry | ||
| 385 | align="char"> | ||
| 386 | <para>void *buf</para> | ||
| 387 | </entry><entry | ||
| 388 | align="char"> | ||
| 389 | <para>Pointer to the buffer to be used for returned filtered data.</para> | ||
| 390 | </entry> | ||
| 391 | </row><row><entry | ||
| 392 | align="char"> | ||
| 393 | <para>size_t count</para> | ||
| 394 | </entry><entry | ||
| 395 | align="char"> | ||
| 396 | <para>Size of buf.</para> | ||
| 397 | </entry> | ||
| 398 | </row></tbody></tgroup></informaltable> | ||
| 399 | <para>RETURN VALUE</para> | ||
| 400 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 401 | align="char"> | ||
| 402 | <para>EWOULDBLOCK</para> | ||
| 403 | </entry><entry | ||
| 404 | align="char"> | ||
| 405 | <para>No data to return and O_NONBLOCK was specified.</para> | ||
| 406 | </entry> | ||
| 407 | </row><row><entry | ||
| 408 | align="char"> | ||
| 409 | <para>EBADF</para> | ||
| 410 | </entry><entry | ||
| 411 | align="char"> | ||
| 412 | <para>fd is not a valid open file descriptor.</para> | ||
| 413 | </entry> | ||
| 414 | </row><row><entry | ||
| 415 | align="char"> | ||
| 416 | <para>ECRC</para> | ||
| 417 | </entry><entry | ||
| 418 | align="char"> | ||
| 419 | <para>Last section had a CRC error - no data returned. The | ||
| 420 | buffer is flushed.</para> | ||
| 421 | </entry> | ||
| 422 | </row><row><entry | ||
| 423 | align="char"> | ||
| 424 | <para>EOVERFLOW</para> | ||
| 425 | </entry><entry | ||
| 426 | align="char"> | ||
| 427 | </entry> | ||
| 428 | </row><row><entry | ||
| 429 | align="char"> | ||
| 430 | </entry><entry | ||
| 431 | align="char"> | ||
| 432 | <para>The filtered data was not read from the buffer in due | ||
| 433 | time, resulting in non-read data being lost. The buffer is | ||
| 434 | flushed.</para> | ||
| 435 | </entry> | ||
| 436 | </row><row><entry | ||
| 437 | align="char"> | ||
| 438 | <para>ETIMEDOUT</para> | ||
| 439 | </entry><entry | ||
| 440 | align="char"> | ||
| 441 | <para>The section was not loaded within the stated timeout | ||
| 442 | period. See ioctl DMX_SET_FILTER for how to set a | ||
| 443 | timeout.</para> | ||
| 444 | </entry> | ||
| 445 | </row><row><entry | ||
| 446 | align="char"> | ||
| 447 | <para>EFAULT</para> | ||
| 448 | </entry><entry | ||
| 449 | align="char"> | ||
| 450 | <para>The driver failed to write to the callers buffer due to an | ||
| 451 | invalid *buf pointer.</para> | ||
| 452 | </entry> | ||
| 453 | </row></tbody></tgroup></informaltable> | ||
| 454 | </section> | ||
| 455 | |||
| 456 | <section id="dmx_fwrite"> | ||
| 457 | <title>write()</title> | ||
| 458 | <para>DESCRIPTION | ||
| 459 | </para> | ||
| 460 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 461 | align="char"> | ||
| 462 | <para>This system call is only provided by the logical device /dev/dvb/adapter0/dvr0, | ||
| 463 | associated with the physical demux device that provides the actual DVR | ||
| 464 | functionality. It is used for replay of a digitally recorded Transport Stream. | ||
| 465 | Matching filters have to be defined in the corresponding physical demux | ||
| 466 | device, /dev/dvb/adapter0/demux0. The amount of data to be transferred is | ||
| 467 | implied by count.</para> | ||
| 468 | </entry> | ||
| 469 | </row></tbody></tgroup></informaltable> | ||
| 470 | <para>SYNOPSIS | ||
| 471 | </para> | ||
| 472 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 473 | align="char"> | ||
| 474 | <para>ssize_t write(int fd, const void ⋆buf, size_t | ||
| 475 | count);</para> | ||
| 476 | </entry> | ||
| 477 | </row></tbody></tgroup></informaltable> | ||
| 478 | <para>PARAMETERS | ||
| 479 | </para> | ||
| 480 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 481 | align="char"> | ||
| 482 | <para>int fd</para> | ||
| 483 | </entry><entry | ||
| 484 | align="char"> | ||
| 485 | <para>File descriptor returned by a previous call to open().</para> | ||
| 486 | </entry> | ||
| 487 | </row><row><entry | ||
| 488 | align="char"> | ||
| 489 | <para>void *buf</para> | ||
| 490 | </entry><entry | ||
| 491 | align="char"> | ||
| 492 | <para>Pointer to the buffer containing the Transport Stream.</para> | ||
| 493 | </entry> | ||
| 494 | </row><row><entry | ||
| 495 | align="char"> | ||
| 496 | <para>size_t count</para> | ||
| 497 | </entry><entry | ||
| 498 | align="char"> | ||
| 499 | <para>Size of buf.</para> | ||
| 500 | </entry> | ||
| 501 | </row></tbody></tgroup></informaltable> | ||
| 502 | <para>RETURN VALUE</para> | ||
| 503 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 504 | align="char"> | ||
| 505 | <para>EWOULDBLOCK</para> | ||
| 506 | </entry><entry | ||
| 507 | align="char"> | ||
| 508 | <para>No data was written. This | ||
| 509 | might happen if O_NONBLOCK was specified and there | ||
| 510 | is no more buffer space available (if O_NONBLOCK is | ||
| 511 | not specified the function will block until buffer space is | ||
| 512 | available).</para> | ||
| 513 | </entry> | ||
| 514 | </row><row><entry | ||
| 515 | align="char"> | ||
| 516 | <para>EBUSY</para> | ||
| 517 | </entry><entry | ||
| 518 | align="char"> | ||
| 519 | <para>This error code indicates that there are conflicting | ||
| 520 | requests. The corresponding demux device is setup to | ||
| 521 | receive data from the front- end. Make sure that these | ||
| 522 | filters are stopped and that the filters with input set to | ||
| 523 | DMX_IN_DVR are started.</para> | ||
| 524 | </entry> | ||
| 525 | </row><row><entry | ||
| 526 | align="char"> | ||
| 527 | <para>EBADF</para> | ||
| 528 | </entry><entry | ||
| 529 | align="char"> | ||
| 530 | <para>fd is not a valid open file descriptor.</para> | ||
| 531 | </entry> | ||
| 532 | </row></tbody></tgroup></informaltable> | ||
| 533 | </section> | ||
| 534 | |||
| 535 | <section id="DMX_START"> | ||
| 536 | <title>DMX_START</title> | ||
| 537 | <para>DESCRIPTION | ||
| 538 | </para> | ||
| 539 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 540 | align="char"> | ||
| 541 | <para>This ioctl call is used to start the actual filtering operation defined via the ioctl | ||
| 542 | calls DMX_SET_FILTER or DMX_SET_PES_FILTER.</para> | ||
| 543 | </entry> | ||
| 544 | </row></tbody></tgroup></informaltable> | ||
| 545 | <para>SYNOPSIS | ||
| 546 | </para> | ||
| 547 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 548 | align="char"> | ||
| 549 | <para>int ioctl( int fd, int request = DMX_START);</para> | ||
| 550 | </entry> | ||
| 551 | </row></tbody></tgroup></informaltable> | ||
| 552 | <para>PARAMETERS | ||
| 553 | </para> | ||
| 554 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 555 | align="char"> | ||
| 556 | <para>int fd</para> | ||
| 557 | </entry><entry | ||
| 558 | align="char"> | ||
| 559 | <para>File descriptor returned by a previous call to open().</para> | ||
| 560 | </entry> | ||
| 561 | </row><row><entry | ||
| 562 | align="char"> | ||
| 563 | <para>int request</para> | ||
| 564 | </entry><entry | ||
| 565 | align="char"> | ||
| 566 | <para>Equals DMX_START for this command.</para> | ||
| 567 | </entry> | ||
| 568 | </row></tbody></tgroup></informaltable> | ||
| 569 | &return-value-dvb; | ||
| 570 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 571 | align="char"> | ||
| 572 | <para>EINVAL</para> | ||
| 573 | </entry><entry | ||
| 574 | align="char"> | ||
| 575 | <para>Invalid argument, i.e. no filtering parameters provided via | ||
| 576 | the DMX_SET_FILTER or DMX_SET_PES_FILTER | ||
| 577 | functions.</para> | ||
| 578 | </entry> | ||
| 579 | </row><row><entry | ||
| 580 | align="char"> | ||
| 581 | <para>EBUSY</para> | ||
| 582 | </entry><entry | ||
| 583 | align="char"> | ||
| 584 | <para>This error code indicates that there are conflicting | ||
| 585 | requests. There are active filters filtering data from | ||
| 586 | another input source. Make sure that these filters are | ||
| 587 | stopped before starting this filter.</para> | ||
| 588 | </entry> | ||
| 589 | </row></tbody></tgroup></informaltable> | ||
| 590 | </section> | ||
| 591 | |||
| 592 | <section id="DMX_STOP"> | ||
| 593 | <title>DMX_STOP</title> | ||
| 594 | <para>DESCRIPTION | ||
| 595 | </para> | ||
| 596 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 597 | align="char"> | ||
| 598 | <para>This ioctl call is used to stop the actual filtering operation defined via the | ||
| 599 | ioctl calls DMX_SET_FILTER or DMX_SET_PES_FILTER and started via | ||
| 600 | the DMX_START command.</para> | ||
| 601 | </entry> | ||
| 602 | </row></tbody></tgroup></informaltable> | ||
| 603 | <para>SYNOPSIS | ||
| 604 | </para> | ||
| 605 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 606 | align="char"> | ||
| 607 | <para>int ioctl( int fd, int request = DMX_STOP);</para> | ||
| 608 | </entry> | ||
| 609 | </row></tbody></tgroup></informaltable> | ||
| 610 | <para>PARAMETERS | ||
| 611 | </para> | ||
| 612 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 613 | align="char"> | ||
| 614 | <para>int fd</para> | ||
| 615 | </entry><entry | ||
| 616 | align="char"> | ||
| 617 | <para>File descriptor returned by a previous call to open().</para> | ||
| 618 | </entry> | ||
| 619 | </row><row><entry | ||
| 620 | align="char"> | ||
| 621 | <para>int request</para> | ||
| 622 | </entry><entry | ||
| 623 | align="char"> | ||
| 624 | <para>Equals DMX_STOP for this command.</para> | ||
| 625 | </entry> | ||
| 626 | </row></tbody></tgroup></informaltable> | ||
| 627 | &return-value-dvb; | ||
| 628 | </section> | ||
| 629 | |||
| 630 | <section id="DMX_SET_FILTER"> | ||
| 631 | <title>DMX_SET_FILTER</title> | ||
| 632 | <para>DESCRIPTION | ||
| 633 | </para> | ||
| 634 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 635 | align="char"> | ||
| 636 | <para>This ioctl call sets up a filter according to the filter and mask parameters | ||
| 637 | provided. A timeout may be defined stating number of seconds to wait for a | ||
| 638 | section to be loaded. A value of 0 means that no timeout should be applied. | ||
| 639 | Finally there is a flag field where it is possible to state whether a section should | ||
| 640 | be CRC-checked, whether the filter should be a ”one-shot” filter, i.e. if the | ||
| 641 | filtering operation should be stopped after the first section is received, and | ||
| 642 | whether the filtering operation should be started immediately (without waiting | ||
| 643 | for a DMX_START ioctl call). If a filter was previously set-up, this filter will | ||
| 644 | be canceled, and the receive buffer will be flushed.</para> | ||
| 645 | </entry> | ||
| 646 | </row></tbody></tgroup></informaltable> | ||
| 647 | <para>SYNOPSIS | ||
| 648 | </para> | ||
| 649 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 650 | align="char"> | ||
| 651 | <para>int ioctl( int fd, int request = DMX_SET_FILTER, | ||
| 652 | struct dmx_sct_filter_params ⋆params);</para> | ||
| 653 | </entry> | ||
| 654 | </row></tbody></tgroup></informaltable> | ||
| 655 | <para>PARAMETERS | ||
| 656 | </para> | ||
| 657 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 658 | align="char"> | ||
| 659 | <para>int fd</para> | ||
| 660 | </entry><entry | ||
| 661 | align="char"> | ||
| 662 | <para>File descriptor returned by a previous call to open().</para> | ||
| 663 | </entry> | ||
| 664 | </row><row><entry | ||
| 665 | align="char"> | ||
| 666 | <para>int request</para> | ||
| 667 | </entry><entry | ||
| 668 | align="char"> | ||
| 669 | <para>Equals DMX_SET_FILTER for this command.</para> | ||
| 670 | </entry> | ||
| 671 | </row><row><entry | ||
| 672 | align="char"> | ||
| 673 | <para>struct | ||
| 674 | dmx_sct_filter_params | ||
| 675 | *params</para> | ||
| 676 | </entry><entry | ||
| 677 | align="char"> | ||
| 678 | <para>Pointer to structure containing filter parameters.</para> | ||
| 679 | </entry> | ||
| 680 | </row></tbody></tgroup></informaltable> | ||
| 681 | &return-value-dvb; | ||
| 682 | </section> | ||
| 683 | |||
| 684 | <section id="DMX_SET_PES_FILTER"> | ||
| 685 | <title>DMX_SET_PES_FILTER</title> | ||
| 686 | <para>DESCRIPTION | ||
| 687 | </para> | ||
| 688 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 689 | align="char"> | ||
| 690 | <para>This ioctl call sets up a PES filter according to the parameters provided. By a | ||
| 691 | PES filter is meant a filter that is based just on the packet identifier (PID), i.e. | ||
| 692 | no PES header or payload filtering capability is supported.</para> | ||
| 693 | </entry> | ||
| 694 | </row><row><entry | ||
| 695 | align="char"> | ||
| 696 | <para>The transport stream destination for the filtered output may be set. Also the | ||
| 697 | PES type may be stated in order to be able to e.g. direct a video stream directly | ||
| 698 | to the video decoder. Finally there is a flag field where it is possible to state | ||
| 699 | whether the filtering operation should be started immediately (without waiting | ||
| 700 | for a DMX_START ioctl call). If a filter was previously set-up, this filter will | ||
| 701 | be cancelled, and the receive buffer will be flushed.</para> | ||
| 702 | </entry> | ||
| 703 | </row></tbody></tgroup></informaltable> | ||
| 704 | <para>SYNOPSIS | ||
| 705 | </para> | ||
| 706 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 707 | align="char"> | ||
| 708 | <para>int ioctl( int fd, int request = DMX_SET_PES_FILTER, | ||
| 709 | struct dmx_pes_filter_params ⋆params);</para> | ||
| 710 | </entry> | ||
| 711 | </row></tbody></tgroup></informaltable> | ||
| 712 | <para>PARAMETERS | ||
| 713 | </para> | ||
| 714 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 715 | align="char"> | ||
| 716 | <para>int fd</para> | ||
| 717 | </entry><entry | ||
| 718 | align="char"> | ||
| 719 | <para>File descriptor returned by a previous call to open().</para> | ||
| 720 | </entry> | ||
| 721 | </row><row><entry | ||
| 722 | align="char"> | ||
| 723 | <para>int request</para> | ||
| 724 | </entry><entry | ||
| 725 | align="char"> | ||
| 726 | <para>Equals DMX_SET_PES_FILTER for this command.</para> | ||
| 727 | </entry> | ||
| 728 | </row><row><entry | ||
| 729 | align="char"> | ||
| 730 | <para>struct | ||
| 731 | dmx_pes_filter_params | ||
| 732 | *params</para> | ||
| 733 | </entry><entry | ||
| 734 | align="char"> | ||
| 735 | <para>Pointer to structure containing filter parameters.</para> | ||
| 736 | </entry> | ||
| 737 | </row></tbody></tgroup></informaltable> | ||
| 738 | &return-value-dvb; | ||
| 739 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 740 | align="char"> | ||
| 741 | <para>EBUSY</para> | ||
| 742 | </entry><entry | ||
| 743 | align="char"> | ||
| 744 | <para>This error code indicates that there are conflicting | ||
| 745 | requests. There are active filters filtering data from | ||
| 746 | another input source. Make sure that these filters are | ||
| 747 | stopped before starting this filter.</para> | ||
| 748 | </entry> | ||
| 749 | </row></tbody></tgroup></informaltable> | ||
| 750 | </section> | ||
| 751 | |||
| 752 | <section id="DMX_SET_BUFFER_SIZE"> | ||
| 753 | <title>DMX_SET_BUFFER_SIZE</title> | ||
| 754 | <para>DESCRIPTION | ||
| 755 | </para> | ||
| 756 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 757 | align="char"> | ||
| 758 | <para>This ioctl call is used to set the size of the circular buffer used for filtered data. | ||
| 759 | The default size is two maximum sized sections, i.e. if this function is not called | ||
| 760 | a buffer size of 2 * 4096 bytes will be used.</para> | ||
| 761 | </entry> | ||
| 762 | </row></tbody></tgroup></informaltable> | ||
| 763 | <para>SYNOPSIS | ||
| 764 | </para> | ||
| 765 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 766 | align="char"> | ||
| 767 | <para>int ioctl( int fd, int request = | ||
| 768 | DMX_SET_BUFFER_SIZE, unsigned long size);</para> | ||
| 769 | </entry> | ||
| 770 | </row></tbody></tgroup></informaltable> | ||
| 771 | <para>PARAMETERS | ||
| 772 | </para> | ||
| 773 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 774 | align="char"> | ||
| 775 | <para>int fd</para> | ||
| 776 | </entry><entry | ||
| 777 | align="char"> | ||
| 778 | <para>File descriptor returned by a previous call to open().</para> | ||
| 779 | </entry> | ||
| 780 | </row><row><entry | ||
| 781 | align="char"> | ||
| 782 | <para>int request</para> | ||
| 783 | </entry><entry | ||
| 784 | align="char"> | ||
| 785 | <para>Equals DMX_SET_BUFFER_SIZE for this command.</para> | ||
| 786 | </entry> | ||
| 787 | </row><row><entry | ||
| 788 | align="char"> | ||
| 789 | <para>unsigned long size</para> | ||
| 790 | </entry><entry | ||
| 791 | align="char"> | ||
| 792 | <para>Size of circular buffer.</para> | ||
| 793 | </entry> | ||
| 794 | </row></tbody></tgroup></informaltable> | ||
| 795 | &return-value-dvb; | ||
| 796 | </section> | ||
| 797 | |||
| 798 | <section id="DMX_GET_EVENT"> | ||
| 799 | <title>DMX_GET_EVENT</title> | ||
| 800 | <para>DESCRIPTION | ||
| 801 | </para> | ||
| 802 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 803 | align="char"> | ||
| 804 | <para>This ioctl call returns an event if available. If an event is not available, | ||
| 805 | the behavior depends on whether the device is in blocking or non-blocking | ||
| 806 | mode. In the latter case, the call fails immediately with errno set to | ||
| 807 | EWOULDBLOCK. In the former case, the call blocks until an event becomes | ||
| 808 | available.</para> | ||
| 809 | </entry> | ||
| 810 | </row><row><entry | ||
| 811 | align="char"> | ||
| 812 | <para>The standard Linux poll() and/or select() system calls can be used with the | ||
| 813 | device file descriptor to watch for new events. For select(), the file descriptor | ||
| 814 | should be included in the exceptfds argument, and for poll(), POLLPRI should | ||
| 815 | be specified as the wake-up condition. Only the latest event for each filter is | ||
| 816 | saved.</para> | ||
| 817 | </entry> | ||
| 818 | </row></tbody></tgroup></informaltable> | ||
| 819 | <para>SYNOPSIS | ||
| 820 | </para> | ||
| 821 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 822 | align="char"> | ||
| 823 | <para>int ioctl( int fd, int request = DMX_GET_EVENT, | ||
| 824 | struct dmx_event ⋆ev);</para> | ||
| 825 | </entry> | ||
| 826 | </row></tbody></tgroup></informaltable> | ||
| 827 | <para>PARAMETERS | ||
| 828 | </para> | ||
| 829 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 830 | align="char"> | ||
| 831 | <para>int fd</para> | ||
| 832 | </entry><entry | ||
| 833 | align="char"> | ||
| 834 | <para>File descriptor returned by a previous call to open().</para> | ||
| 835 | </entry> | ||
| 836 | </row><row><entry | ||
| 837 | align="char"> | ||
| 838 | <para>int request</para> | ||
| 839 | </entry><entry | ||
| 840 | align="char"> | ||
| 841 | <para>Equals DMX_GET_EVENT for this command.</para> | ||
| 842 | </entry> | ||
| 843 | </row><row><entry | ||
| 844 | align="char"> | ||
| 845 | <para>struct dmx_event *ev</para> | ||
| 846 | </entry><entry | ||
| 847 | align="char"> | ||
| 848 | <para>Pointer to the location where the event is to be stored.</para> | ||
| 849 | </entry> | ||
| 850 | </row></tbody></tgroup></informaltable> | ||
| 851 | &return-value-dvb; | ||
| 852 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 853 | align="char"> | ||
| 854 | <para>EWOULDBLOCK</para> | ||
| 855 | </entry><entry | ||
| 856 | align="char"> | ||
| 857 | <para>There is no event pending, and the device is in | ||
| 858 | non-blocking mode.</para> | ||
| 859 | </entry> | ||
| 860 | </row></tbody></tgroup></informaltable> | ||
| 861 | </section> | ||
| 862 | |||
| 863 | <section id="DMX_GET_STC"> | ||
| 864 | <title>DMX_GET_STC</title> | ||
| 865 | <para>DESCRIPTION | ||
| 866 | </para> | ||
| 867 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 868 | align="char"> | ||
| 869 | <para>This ioctl call returns the current value of the system time counter (which is driven | ||
| 870 | by a PES filter of type DMX_PES_PCR). Some hardware supports more than one | ||
| 871 | STC, so you must specify which one by setting the num field of stc before the ioctl | ||
| 872 | (range 0...n). The result is returned in form of a ratio with a 64 bit numerator | ||
| 873 | and a 32 bit denominator, so the real 90kHz STC value is stc->stc / | ||
| 874 | stc->base | ||
| 875 | .</para> | ||
| 876 | </entry> | ||
| 877 | </row></tbody></tgroup></informaltable> | ||
| 878 | <para>SYNOPSIS | ||
| 879 | </para> | ||
| 880 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 881 | align="char"> | ||
| 882 | <para>int ioctl( int fd, int request = DMX_GET_STC, struct | ||
| 883 | dmx_stc ⋆stc);</para> | ||
| 884 | </entry> | ||
| 885 | </row></tbody></tgroup></informaltable> | ||
| 886 | <para>PARAMETERS | ||
| 887 | </para> | ||
| 888 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 889 | align="char"> | ||
| 890 | <para>int fd</para> | ||
| 891 | </entry><entry | ||
| 892 | align="char"> | ||
| 893 | <para>File descriptor returned by a previous call to open().</para> | ||
| 894 | </entry> | ||
| 895 | </row><row><entry | ||
| 896 | align="char"> | ||
| 897 | <para>int request</para> | ||
| 898 | </entry><entry | ||
| 899 | align="char"> | ||
| 900 | <para>Equals DMX_GET_STC for this command.</para> | ||
| 901 | </entry> | ||
| 902 | </row><row><entry | ||
| 903 | align="char"> | ||
| 904 | <para>struct dmx_stc *stc</para> | ||
| 905 | </entry><entry | ||
| 906 | align="char"> | ||
| 907 | <para>Pointer to the location where the stc is to be stored.</para> | ||
| 908 | </entry> | ||
| 909 | </row></tbody></tgroup></informaltable> | ||
| 910 | &return-value-dvb; | ||
| 911 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 912 | align="char"> | ||
| 913 | <para>EINVAL</para> | ||
| 914 | </entry><entry | ||
| 915 | align="char"> | ||
| 916 | <para>Invalid stc number.</para> | ||
| 917 | </entry> | ||
| 918 | </row></tbody></tgroup></informaltable> | ||
| 919 | </section> | ||
| 920 | |||
| 921 | <section id="DMX_GET_PES_PIDS" | ||
| 922 | role="subsection"><title>DMX_GET_PES_PIDS</title> | ||
| 923 | <para>DESCRIPTION | ||
| 924 | </para> | ||
| 925 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 926 | align="char"> | ||
| 927 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 928 | </entry> | ||
| 929 | </row></tbody></tgroup></informaltable> | ||
| 930 | <para>SYNOPSIS | ||
| 931 | </para> | ||
| 932 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 933 | align="char"> | ||
| 934 | <para>int ioctl(fd, int request = DMX_GET_PES_PIDS, | ||
| 935 | __u16[5]);</para> | ||
| 936 | </entry> | ||
| 937 | </row></tbody></tgroup></informaltable> | ||
| 938 | <para>PARAMETERS | ||
| 939 | </para> | ||
| 940 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 941 | align="char"> | ||
| 942 | <para>int fd</para> | ||
| 943 | </entry><entry | ||
| 944 | align="char"> | ||
| 945 | <para>File descriptor returned by a previous call to open().</para> | ||
| 946 | </entry> | ||
| 947 | </row><row><entry | ||
| 948 | align="char"> | ||
| 949 | <para>int request</para> | ||
| 950 | </entry><entry | ||
| 951 | align="char"> | ||
| 952 | <para>Equals DMX_GET_PES_PIDS for this command.</para> | ||
| 953 | </entry> | ||
| 954 | </row><row><entry | ||
| 955 | align="char"> | ||
| 956 | <para>__u16[5] | ||
| 957 | </para> | ||
| 958 | </entry><entry | ||
| 959 | align="char"> | ||
| 960 | <para>Undocumented.</para> | ||
| 961 | </entry> | ||
| 962 | </row></tbody></tgroup></informaltable> | ||
| 963 | &return-value-dvb; | ||
| 964 | </section> | ||
| 965 | |||
| 966 | <section id="DMX_GET_CAPS" | ||
| 967 | role="subsection"><title>DMX_GET_CAPS</title> | ||
| 968 | <para>DESCRIPTION | ||
| 969 | </para> | ||
| 970 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 971 | align="char"> | ||
| 972 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 973 | </entry> | ||
| 974 | </row></tbody></tgroup></informaltable> | ||
| 975 | <para>SYNOPSIS | ||
| 976 | </para> | ||
| 977 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 978 | align="char"> | ||
| 979 | <para>int ioctl(fd, int request = DMX_GET_CAPS, | ||
| 980 | dmx_caps_t *);</para> | ||
| 981 | </entry> | ||
| 982 | </row></tbody></tgroup></informaltable> | ||
| 983 | <para>PARAMETERS | ||
| 984 | </para> | ||
| 985 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 986 | align="char"> | ||
| 987 | <para>int fd</para> | ||
| 988 | </entry><entry | ||
| 989 | align="char"> | ||
| 990 | <para>File descriptor returned by a previous call to open().</para> | ||
| 991 | </entry> | ||
| 992 | </row><row><entry | ||
| 993 | align="char"> | ||
| 994 | <para>int request</para> | ||
| 995 | </entry><entry | ||
| 996 | align="char"> | ||
| 997 | <para>Equals DMX_GET_CAPS for this command.</para> | ||
| 998 | </entry> | ||
| 999 | </row><row><entry | ||
| 1000 | align="char"> | ||
| 1001 | <para>dmx_caps_t * | ||
| 1002 | </para> | ||
| 1003 | </entry><entry | ||
| 1004 | align="char"> | ||
| 1005 | <para>Undocumented.</para> | ||
| 1006 | </entry> | ||
| 1007 | </row></tbody></tgroup></informaltable> | ||
| 1008 | &return-value-dvb; | ||
| 1009 | </section> | ||
| 1010 | |||
| 1011 | <section id="DMX_SET_SOURCE" | ||
| 1012 | role="subsection"><title>DMX_SET_SOURCE</title> | ||
| 1013 | <para>DESCRIPTION | ||
| 1014 | </para> | ||
| 1015 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1016 | align="char"> | ||
| 1017 | <para>This ioctl is undocumented. Documentation is welcome.</para> | ||
| 1018 | </entry> | ||
| 1019 | </row></tbody></tgroup></informaltable> | ||
| 1020 | <para>SYNOPSIS | ||
| 1021 | </para> | ||
| 1022 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1023 | align="char"> | ||
| 1024 | <para>int ioctl(fd, int request = DMX_SET_SOURCE, | ||
| 1025 | dmx_source_t *);</para> | ||
| 1026 | </entry> | ||
| 1027 | </row></tbody></tgroup></informaltable> | ||
| 1028 | <para>PARAMETERS | ||
| 1029 | </para> | ||
| 1030 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1031 | align="char"> | ||
| 1032 | <para>int fd</para> | ||
| 1033 | </entry><entry | ||
| 1034 | align="char"> | ||
| 1035 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1036 | </entry> | ||
| 1037 | </row><row><entry | ||
| 1038 | align="char"> | ||
| 1039 | <para>int request</para> | ||
| 1040 | </entry><entry | ||
| 1041 | align="char"> | ||
| 1042 | <para>Equals DMX_SET_SOURCE for this command.</para> | ||
| 1043 | </entry> | ||
| 1044 | </row><row><entry | ||
| 1045 | align="char"> | ||
| 1046 | <para>dmx_source_t * | ||
| 1047 | </para> | ||
| 1048 | </entry><entry | ||
| 1049 | align="char"> | ||
| 1050 | <para>Undocumented.</para> | ||
| 1051 | </entry> | ||
| 1052 | </row></tbody></tgroup></informaltable> | ||
| 1053 | &return-value-dvb; | ||
| 1054 | </section> | ||
| 1055 | |||
| 1056 | <section id="DMX_ADD_PID" | ||
| 1057 | role="subsection"><title>DMX_ADD_PID</title> | ||
| 1058 | <para>DESCRIPTION | ||
| 1059 | </para> | ||
| 1060 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1061 | align="char"> | ||
| 1062 | <para>This ioctl call allows to add multiple PIDs to a transport stream filter | ||
| 1063 | previously set up with DMX_SET_PES_FILTER and output equal to DMX_OUT_TSDEMUX_TAP. | ||
| 1064 | </para></entry></row><row><entry align="char"><para> | ||
| 1065 | It is used by readers of /dev/dvb/adapterX/demuxY. | ||
| 1066 | </para></entry></row><row><entry align="char"><para> | ||
| 1067 | It may be called at any time, i.e. before or after the first filter on the | ||
| 1068 | shared file descriptor was started. It makes it possible to record multiple | ||
| 1069 | services without the need to de-multiplex or re-multiplex TS packets.</para> | ||
| 1070 | </entry> | ||
| 1071 | </row></tbody></tgroup></informaltable> | ||
| 1072 | <para>SYNOPSIS | ||
| 1073 | </para> | ||
| 1074 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1075 | align="char"> | ||
| 1076 | <para>int ioctl(fd, int request = DMX_ADD_PID, | ||
| 1077 | __u16 *);</para> | ||
| 1078 | </entry> | ||
| 1079 | </row></tbody></tgroup></informaltable> | ||
| 1080 | <para>PARAMETERS | ||
| 1081 | </para> | ||
| 1082 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1083 | align="char"> | ||
| 1084 | <para>int fd</para> | ||
| 1085 | </entry><entry | ||
| 1086 | align="char"> | ||
| 1087 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1088 | </entry> | ||
| 1089 | </row><row><entry | ||
| 1090 | align="char"> | ||
| 1091 | <para>int request</para> | ||
| 1092 | </entry><entry | ||
| 1093 | align="char"> | ||
| 1094 | <para>Equals DMX_ADD_PID for this command.</para> | ||
| 1095 | </entry> | ||
| 1096 | </row><row><entry | ||
| 1097 | align="char"> | ||
| 1098 | <para>__u16 * | ||
| 1099 | </para> | ||
| 1100 | </entry><entry | ||
| 1101 | align="char"> | ||
| 1102 | <para>PID number to be filtered.</para> | ||
| 1103 | </entry> | ||
| 1104 | </row></tbody></tgroup></informaltable> | ||
| 1105 | &return-value-dvb; | ||
| 1106 | </section> | ||
| 1107 | |||
| 1108 | <section id="DMX_REMOVE_PID" | ||
| 1109 | role="subsection"><title>DMX_REMOVE_PID</title> | ||
| 1110 | <para>DESCRIPTION | ||
| 1111 | </para> | ||
| 1112 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1113 | align="char"> | ||
| 1114 | <para>This ioctl call allows to remove a PID when multiple PIDs are set on a | ||
| 1115 | transport stream filter, e. g. a filter previously set up with output equal to | ||
| 1116 | DMX_OUT_TSDEMUX_TAP, created via either DMX_SET_PES_FILTER or DMX_ADD_PID. | ||
| 1117 | </para></entry></row><row><entry align="char"><para> | ||
| 1118 | It is used by readers of /dev/dvb/adapterX/demuxY. | ||
| 1119 | </para></entry></row><row><entry align="char"><para> | ||
| 1120 | It may be called at any time, i.e. before or after the first filter on the | ||
| 1121 | shared file descriptor was started. It makes it possible to record multiple | ||
| 1122 | services without the need to de-multiplex or re-multiplex TS packets.</para> | ||
| 1123 | </entry> | ||
| 1124 | </row></tbody></tgroup></informaltable> | ||
| 1125 | <para>SYNOPSIS | ||
| 1126 | </para> | ||
| 1127 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1128 | align="char"> | ||
| 1129 | <para>int ioctl(fd, int request = DMX_REMOVE_PID, | ||
| 1130 | __u16 *);</para> | ||
| 1131 | </entry> | ||
| 1132 | </row></tbody></tgroup></informaltable> | ||
| 1133 | <para>PARAMETERS | ||
| 1134 | </para> | ||
| 1135 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1136 | align="char"> | ||
| 1137 | <para>int fd</para> | ||
| 1138 | </entry><entry | ||
| 1139 | align="char"> | ||
| 1140 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1141 | </entry> | ||
| 1142 | </row><row><entry | ||
| 1143 | align="char"> | ||
| 1144 | <para>int request</para> | ||
| 1145 | </entry><entry | ||
| 1146 | align="char"> | ||
| 1147 | <para>Equals DMX_REMOVE_PID for this command.</para> | ||
| 1148 | </entry> | ||
| 1149 | </row><row><entry | ||
| 1150 | align="char"> | ||
| 1151 | <para>__u16 * | ||
| 1152 | </para> | ||
| 1153 | </entry><entry | ||
| 1154 | align="char"> | ||
| 1155 | <para>PID of the PES filter to be removed.</para> | ||
| 1156 | </entry> | ||
| 1157 | </row></tbody></tgroup></informaltable> | ||
| 1158 | &return-value-dvb; | ||
| 1159 | </section> | ||
| 1160 | |||
| 1161 | |||
| 1162 | </section> | ||
| @@ -1,156 +0,0 @@ | |||
| 1 | <partinfo> | ||
| 2 | <authorgroup> | ||
| 3 | <author> | ||
| 4 | <firstname>Ralph</firstname> | ||
| 5 | <surname>Metzler</surname> | ||
| 6 | <othername role="mi">J. K.</othername> | ||
| 7 | <affiliation><address><email>rjkm@metzlerbros.de</email></address></affiliation> | ||
| 8 | </author> | ||
| 9 | <author> | ||
| 10 | <firstname>Marcus</firstname> | ||
| 11 | <surname>Metzler</surname> | ||
| 12 | <othername role="mi">O. C.</othername> | ||
| 13 | <affiliation><address><email>rjkm@metzlerbros.de</email></address></affiliation> | ||
| 14 | </author> | ||
| 15 | </authorgroup> | ||
| 16 | <authorgroup> | ||
| 17 | <author> | ||
| 18 | <firstname>Mauro</firstname> | ||
| 19 | <othername role="mi">Carvalho</othername> | ||
| 20 | <surname>Chehab</surname> | ||
| 21 | <affiliation><address><email>m.chehab@samsung.com</email></address></affiliation> | ||
| 22 | <contrib>Ported document to Docbook XML.</contrib> | ||
| 23 | </author> | ||
| 24 | </authorgroup> | ||
| 25 | <copyright> | ||
| 26 | <year>2002</year> | ||
| 27 | <year>2003</year> | ||
| 28 | <holder>Convergence GmbH</holder> | ||
| 29 | </copyright> | ||
| 30 | <copyright> | ||
| 31 | <year>2009-2015</year> | ||
| 32 | <holder>Mauro Carvalho Chehab</holder> | ||
| 33 | </copyright> | ||
| 34 | |||
| 35 | <revhistory> | ||
| 36 | <!-- Put document revisions here, newest first. --> | ||
| 37 | <revision> | ||
| 38 | <revnumber>2.1.0</revnumber> | ||
| 39 | <date>2015-05-29</date> | ||
| 40 | <authorinitials>mcc</authorinitials> | ||
| 41 | <revremark> | ||
| 42 | DocBook improvements and cleanups, in order to document the | ||
| 43 | system calls on a more standard way and provide more description | ||
| 44 | about the current DVB API. | ||
| 45 | </revremark> | ||
| 46 | </revision> | ||
| 47 | <revision> | ||
| 48 | <revnumber>2.0.4</revnumber> | ||
| 49 | <date>2011-05-06</date> | ||
| 50 | <authorinitials>mcc</authorinitials> | ||
| 51 | <revremark> | ||
| 52 | Add more information about DVB APIv5, better describing the frontend GET/SET props ioctl's. | ||
| 53 | </revremark> | ||
| 54 | </revision> | ||
| 55 | <revision> | ||
| 56 | <revnumber>2.0.3</revnumber> | ||
| 57 | <date>2010-07-03</date> | ||
| 58 | <authorinitials>mcc</authorinitials> | ||
| 59 | <revremark> | ||
| 60 | Add some frontend capabilities flags, present on kernel, but missing at the specs. | ||
| 61 | </revremark> | ||
| 62 | </revision> | ||
| 63 | <revision> | ||
| 64 | <revnumber>2.0.2</revnumber> | ||
| 65 | <date>2009-10-25</date> | ||
| 66 | <authorinitials>mcc</authorinitials> | ||
| 67 | <revremark> | ||
| 68 | documents FE_SET_FRONTEND_TUNE_MODE and FE_DISHETWORK_SEND_LEGACY_CMD ioctls. | ||
| 69 | </revremark> | ||
| 70 | </revision> | ||
| 71 | <revision> | ||
| 72 | <revnumber>2.0.1</revnumber> | ||
| 73 | <date>2009-09-16</date> | ||
| 74 | <authorinitials>mcc</authorinitials> | ||
| 75 | <revremark> | ||
| 76 | Added ISDB-T test originally written by Patrick Boettcher | ||
| 77 | </revremark> | ||
| 78 | </revision> | ||
| 79 | <revision> | ||
| 80 | <revnumber>2.0.0</revnumber> | ||
| 81 | <date>2009-09-06</date> | ||
| 82 | <authorinitials>mcc</authorinitials> | ||
| 83 | <revremark>Conversion from LaTex to DocBook XML. The | ||
| 84 | contents is the same as the original LaTex version.</revremark> | ||
| 85 | </revision> | ||
| 86 | <revision> | ||
| 87 | <revnumber>1.0.0</revnumber> | ||
| 88 | <date>2003-07-24</date> | ||
| 89 | <authorinitials>rjkm</authorinitials> | ||
| 90 | <revremark>Initial revision on LaTEX.</revremark> | ||
| 91 | </revision> | ||
| 92 | </revhistory> | ||
| 93 | </partinfo> | ||
| 94 | |||
| 95 | |||
| 96 | <title>LINUX DVB API</title> | ||
| 97 | <subtitle>Version 5.10</subtitle> | ||
| 98 | <!-- ADD THE CHAPTERS HERE --> | ||
| 99 | <chapter id="dvb_introdution"> | ||
| 100 | &sub-intro; | ||
| 101 | </chapter> | ||
| 102 | <chapter id="dvb_frontend"> | ||
| 103 | &sub-frontend; | ||
| 104 | </chapter> | ||
| 105 | <chapter id="dvb_demux"> | ||
| 106 | &sub-demux; | ||
| 107 | </chapter> | ||
| 108 | <chapter id="dvb_ca"> | ||
| 109 | &sub-ca; | ||
| 110 | </chapter> | ||
| 111 | <chapter id="net"> | ||
| 112 | &sub-net; | ||
| 113 | </chapter> | ||
| 114 | <chapter id="legacy_dvb_apis"> | ||
| 115 | <title>DVB Deprecated APIs</title> | ||
| 116 | <para>The APIs described here are kept only for historical reasons. There's | ||
| 117 | just one driver for a very legacy hardware that uses this API. No | ||
| 118 | modern drivers should use it. Instead, audio and video should be using | ||
| 119 | the V4L2 and ALSA APIs, and the pipelines should be set using the | ||
| 120 | Media Controller API</para> | ||
| 121 | <section id="dvb_video"> | ||
| 122 | &sub-video; | ||
| 123 | </section> | ||
| 124 | <section id="dvb_audio"> | ||
| 125 | &sub-audio; | ||
| 126 | </section> | ||
| 127 | </chapter> | ||
| 128 | <chapter id="dvb_examples"> | ||
| 129 | &sub-examples; | ||
| 130 | </chapter> | ||
| 131 | <!-- END OF CHAPTERS --> | ||
| 132 | <appendix id="audio_h"> | ||
| 133 | <title>DVB Audio Header File</title> | ||
| 134 | &sub-audio-h; | ||
| 135 | </appendix> | ||
| 136 | <appendix id="ca_h"> | ||
| 137 | <title>DVB Conditional Access Header File</title> | ||
| 138 | &sub-ca-h; | ||
| 139 | </appendix> | ||
| 140 | <appendix id="dmx_h"> | ||
| 141 | <title>DVB Demux Header File</title> | ||
| 142 | &sub-dmx-h; | ||
| 143 | </appendix> | ||
| 144 | <appendix id="frontend_h"> | ||
| 145 | <title>DVB Frontend Header File</title> | ||
| 146 | &sub-frontend-h; | ||
| 147 | </appendix> | ||
| 148 | <appendix id="net_h"> | ||
| 149 | <title>DVB Network Header File</title> | ||
| 150 | &sub-net-h; | ||
| 151 | </appendix> | ||
| 152 | <appendix id="video_h"> | ||
| 153 | <title>DVB Video Header File</title> | ||
| 154 | &sub-video-h; | ||
| 155 | </appendix> | ||
| 156 | |||
| @@ -1,1680 +0,0 @@ | |||
| 1 | <section id="frontend-properties"> | ||
| 2 | <title>DVB Frontend properties</title> | ||
| 3 | <para>Tuning into a Digital TV physical channel and starting decoding it | ||
| 4 | requires changing a set of parameters, in order to control the | ||
| 5 | tuner, the demodulator, the Linear Low-noise Amplifier (LNA) and to set the | ||
| 6 | antenna subsystem via Satellite Equipment Control (SEC), on satellite | ||
| 7 | systems. The actual parameters are specific to each particular digital | ||
| 8 | TV standards, and may change as the digital TV specs evolves.</para> | ||
| 9 | <para>In the past, the strategy used was to have a union with the parameters | ||
| 10 | needed to tune for DVB-S, DVB-C, DVB-T and ATSC delivery systems grouped | ||
| 11 | there. The problem is that, as the second generation standards appeared, | ||
| 12 | those structs were not big enough to contain the additional parameters. | ||
| 13 | Also, the union didn't have any space left to be expanded without breaking | ||
| 14 | userspace. So, the decision was to deprecate the legacy union/struct based | ||
| 15 | approach, in favor of a properties set approach.</para> | ||
| 16 | |||
| 17 | <para>NOTE: on Linux DVB API version 3, setting a frontend were done via | ||
| 18 | <link linkend="dvb-frontend-parameters">struct <constant>dvb_frontend_parameters</constant></link>. | ||
| 19 | This got replaced on version 5 (also called "S2API", as this API were | ||
| 20 | added originally_enabled to provide support for DVB-S2), because the old | ||
| 21 | API has a very limited support to new standards and new hardware. This | ||
| 22 | section describes the new and recommended way to set the frontend, with | ||
| 23 | suppports all digital TV delivery systems.</para> | ||
| 24 | |||
| 25 | <para>Example: with the properties based approach, in order to set the tuner | ||
| 26 | to a DVB-C channel at 651 kHz, modulated with 256-QAM, FEC 3/4 and symbol | ||
| 27 | rate of 5.217 Mbauds, those properties should be sent to | ||
| 28 | <link linkend="FE_GET_PROPERTY"><constant>FE_SET_PROPERTY</constant></link> ioctl:</para> | ||
| 29 | <itemizedlist> | ||
| 30 | <listitem><para>&DTV-DELIVERY-SYSTEM; = SYS_DVBC_ANNEX_A</para></listitem> | ||
| 31 | <listitem><para>&DTV-FREQUENCY; = 651000000</para></listitem> | ||
| 32 | <listitem><para>&DTV-MODULATION; = QAM_256</para></listitem> | ||
| 33 | <listitem><para>&DTV-INVERSION; = INVERSION_AUTO</para></listitem> | ||
| 34 | <listitem><para>&DTV-SYMBOL-RATE; = 5217000</para></listitem> | ||
| 35 | <listitem><para>&DTV-INNER-FEC; = FEC_3_4</para></listitem> | ||
| 36 | <listitem><para>&DTV-TUNE;</para></listitem> | ||
| 37 | </itemizedlist> | ||
| 38 | |||
| 39 | <para>The code that would do the above is:</para> | ||
| 40 | <programlisting> | ||
| 41 | #include <stdio.h> | ||
| 42 | #include <fcntl.h> | ||
| 43 | #include <sys/ioctl.h> | ||
| 44 | #include <linux/dvb/frontend.h> | ||
| 45 | |||
| 46 | static struct dtv_property props[] = { | ||
| 47 | { .cmd = DTV_DELIVERY_SYSTEM, .u.data = SYS_DVBC_ANNEX_A }, | ||
| 48 | { .cmd = DTV_FREQUENCY, .u.data = 651000000 }, | ||
| 49 | { .cmd = DTV_MODULATION, .u.data = QAM_256 }, | ||
| 50 | { .cmd = DTV_INVERSION, .u.data = INVERSION_AUTO }, | ||
| 51 | { .cmd = DTV_SYMBOL_RATE, .u.data = 5217000 }, | ||
| 52 | { .cmd = DTV_INNER_FEC, .u.data = FEC_3_4 }, | ||
| 53 | { .cmd = DTV_TUNE } | ||
| 54 | }; | ||
| 55 | |||
| 56 | static struct dtv_properties dtv_prop = { | ||
| 57 | .num = 6, .props = props | ||
| 58 | }; | ||
| 59 | |||
| 60 | int main(void) | ||
| 61 | { | ||
| 62 | int fd = open("/dev/dvb/adapter0/frontend0", O_RDWR); | ||
| 63 | |||
| 64 | if (!fd) { | ||
| 65 | perror ("open"); | ||
| 66 | return -1; | ||
| 67 | } | ||
| 68 | if (ioctl(fd, FE_SET_PROPERTY, &dtv_prop) == -1) { | ||
| 69 | perror("ioctl"); | ||
| 70 | return -1; | ||
| 71 | } | ||
| 72 | printf("Frontend set\n"); | ||
| 73 | return 0; | ||
| 74 | } | ||
| 75 | </programlisting> | ||
| 76 | |||
| 77 | <para>NOTE: While it is possible to directly call the Kernel code like the | ||
| 78 | above example, it is strongly recommended to use | ||
| 79 | <ulink url="https://linuxtv.org/docs/libdvbv5/index.html">libdvbv5</ulink>, | ||
| 80 | as it provides abstraction to work with the supported digital TV standards | ||
| 81 | and provides methods for usual operations like program scanning and to | ||
| 82 | read/write channel descriptor files.</para> | ||
| 83 | |||
| 84 | <section id="dtv-stats"> | ||
| 85 | <title>struct <structname>dtv_stats</structname></title> | ||
| 86 | <programlisting> | ||
| 87 | struct dtv_stats { | ||
| 88 | __u8 scale; /* enum fecap_scale_params type */ | ||
| 89 | union { | ||
| 90 | __u64 uvalue; /* for counters and relative scales */ | ||
| 91 | __s64 svalue; /* for 1/1000 dB measures */ | ||
| 92 | }; | ||
| 93 | } __packed; | ||
| 94 | </programlisting> | ||
| 95 | </section> | ||
| 96 | <section id="dtv-fe-stats"> | ||
| 97 | <title>struct <structname>dtv_fe_stats</structname></title> | ||
| 98 | <programlisting> | ||
| 99 | #define MAX_DTV_STATS 4 | ||
| 100 | |||
| 101 | struct dtv_fe_stats { | ||
| 102 | __u8 len; | ||
| 103 | &dtv-stats; stat[MAX_DTV_STATS]; | ||
| 104 | } __packed; | ||
| 105 | </programlisting> | ||
| 106 | </section> | ||
| 107 | |||
| 108 | <section id="dtv-property"> | ||
| 109 | <title>struct <structname>dtv_property</structname></title> | ||
| 110 | <programlisting> | ||
| 111 | /* Reserved fields should be set to 0 */ | ||
| 112 | |||
| 113 | struct dtv_property { | ||
| 114 | __u32 cmd; | ||
| 115 | __u32 reserved[3]; | ||
| 116 | union { | ||
| 117 | __u32 data; | ||
| 118 | &dtv-fe-stats; st; | ||
| 119 | struct { | ||
| 120 | __u8 data[32]; | ||
| 121 | __u32 len; | ||
| 122 | __u32 reserved1[3]; | ||
| 123 | void *reserved2; | ||
| 124 | } buffer; | ||
| 125 | } u; | ||
| 126 | int result; | ||
| 127 | } __attribute__ ((packed)); | ||
| 128 | |||
| 129 | /* num of properties cannot exceed DTV_IOCTL_MAX_MSGS per ioctl */ | ||
| 130 | #define DTV_IOCTL_MAX_MSGS 64 | ||
| 131 | </programlisting> | ||
| 132 | </section> | ||
| 133 | <section id="dtv-properties"> | ||
| 134 | <title>struct <structname>dtv_properties</structname></title> | ||
| 135 | <programlisting> | ||
| 136 | struct dtv_properties { | ||
| 137 | __u32 num; | ||
| 138 | &dtv-property; *props; | ||
| 139 | }; | ||
| 140 | </programlisting> | ||
| 141 | </section> | ||
| 142 | |||
| 143 | <section> | ||
| 144 | <title>Property types</title> | ||
| 145 | <para> | ||
| 146 | On <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY and FE_SET_PROPERTY</link>, | ||
| 147 | the actual action is determined by the dtv_property cmd/data pairs. With one single ioctl, is possible to | ||
| 148 | get/set up to 64 properties. The actual meaning of each property is described on the next sections. | ||
| 149 | </para> | ||
| 150 | |||
| 151 | <para>The available frontend property types are shown on the next section.</para> | ||
| 152 | </section> | ||
| 153 | |||
| 154 | <section id="fe_property_parameters"> | ||
| 155 | <title>Digital TV property parameters</title> | ||
| 156 | <section id="DTV-UNDEFINED"> | ||
| 157 | <title><constant>DTV_UNDEFINED</constant></title> | ||
| 158 | <para>Used internally. A GET/SET operation for it won't change or return anything.</para> | ||
| 159 | </section> | ||
| 160 | <section id="DTV-TUNE"> | ||
| 161 | <title><constant>DTV_TUNE</constant></title> | ||
| 162 | <para>Interpret the cache of data, build either a traditional frontend tunerequest so we can pass validation in the <constant>FE_SET_FRONTEND</constant> ioctl.</para> | ||
| 163 | </section> | ||
| 164 | <section id="DTV-CLEAR"> | ||
| 165 | <title><constant>DTV_CLEAR</constant></title> | ||
| 166 | <para>Reset a cache of data specific to the frontend here. This does not effect hardware.</para> | ||
| 167 | </section> | ||
| 168 | <section id="DTV-FREQUENCY"> | ||
| 169 | <title><constant>DTV_FREQUENCY</constant></title> | ||
| 170 | |||
| 171 | <para>Central frequency of the channel.</para> | ||
| 172 | |||
| 173 | <para>Notes:</para> | ||
| 174 | <para>1)For satellite delivery systems, it is measured in kHz. | ||
| 175 | For the other ones, it is measured in Hz.</para> | ||
| 176 | <para>2)For ISDB-T, the channels are usually transmitted with an offset of 143kHz. | ||
| 177 | E.g. a valid frequency could be 474143 kHz. The stepping is bound to the bandwidth of | ||
| 178 | the channel which is 6MHz.</para> | ||
| 179 | |||
| 180 | <para>3)As in ISDB-Tsb the channel consists of only one or three segments the | ||
| 181 | frequency step is 429kHz, 3*429 respectively. As for ISDB-T the | ||
| 182 | central frequency of the channel is expected.</para> | ||
| 183 | </section> | ||
| 184 | <section id="DTV-MODULATION"> | ||
| 185 | <title><constant>DTV_MODULATION</constant></title> | ||
| 186 | <para>Specifies the frontend modulation type for delivery systems that supports | ||
| 187 | more than one modulation type. The modulation can be one of the types | ||
| 188 | defined by &fe-modulation;.</para> | ||
| 189 | |||
| 190 | |||
| 191 | <section id="fe-modulation-t"> | ||
| 192 | <title>Modulation property</title> | ||
| 193 | |||
| 194 | <para>Most of the digital TV standards currently offers more than one possible | ||
| 195 | modulation (sometimes called as "constellation" on some standards). This | ||
| 196 | enum contains the values used by the Kernel. Please note that not all | ||
| 197 | modulations are supported by a given standard.</para> | ||
| 198 | |||
| 199 | <table pgwide="1" frame="none" id="fe-modulation"> | ||
| 200 | <title>enum fe_modulation</title> | ||
| 201 | <tgroup cols="2"> | ||
| 202 | &cs-def; | ||
| 203 | <thead> | ||
| 204 | <row> | ||
| 205 | <entry>ID</entry> | ||
| 206 | <entry>Description</entry> | ||
| 207 | </row> | ||
| 208 | </thead> | ||
| 209 | <tbody valign="top"> | ||
| 210 | <row> | ||
| 211 | <entry id="QPSK"><constant>QPSK</constant></entry> | ||
| 212 | <entry>QPSK modulation</entry> | ||
| 213 | </row><row> | ||
| 214 | <entry id="QAM-16"><constant>QAM_16</constant></entry> | ||
| 215 | <entry>16-QAM modulation</entry> | ||
| 216 | </row><row> | ||
| 217 | <entry id="QAM-32"><constant>QAM_32</constant></entry> | ||
| 218 | <entry>32-QAM modulation</entry> | ||
| 219 | </row><row> | ||
| 220 | <entry id="QAM-64"><constant>QAM_64</constant></entry> | ||
| 221 | <entry>64-QAM modulation</entry> | ||
| 222 | </row><row> | ||
| 223 | <entry id="QAM-128"><constant>QAM_128</constant></entry> | ||
| 224 | <entry>128-QAM modulation</entry> | ||
| 225 | </row><row> | ||
| 226 | <entry id="QAM-256"><constant>QAM_256</constant></entry> | ||
| 227 | <entry>256-QAM modulation</entry> | ||
| 228 | </row><row> | ||
| 229 | <entry id="QAM-AUTO"><constant>QAM_AUTO</constant></entry> | ||
| 230 | <entry>Autodetect QAM modulation</entry> | ||
| 231 | </row><row> | ||
| 232 | <entry id="VSB-8"><constant>VSB_8</constant></entry> | ||
| 233 | <entry>8-VSB modulation</entry> | ||
| 234 | </row><row> | ||
| 235 | <entry id="VSB-16"><constant>VSB_16</constant></entry> | ||
| 236 | <entry>16-VSB modulation</entry> | ||
| 237 | </row><row> | ||
| 238 | <entry id="PSK-8"><constant>PSK_8</constant></entry> | ||
| 239 | <entry>8-PSK modulation</entry> | ||
| 240 | </row><row> | ||
| 241 | <entry id="APSK-16"><constant>APSK_16</constant></entry> | ||
| 242 | <entry>16-APSK modulation</entry> | ||
| 243 | </row><row> | ||
| 244 | <entry id="APSK-32"><constant>APSK_32</constant></entry> | ||
| 245 | <entry>32-APSK modulation</entry> | ||
| 246 | </row><row> | ||
| 247 | <entry id="DQPSK"><constant>DQPSK</constant></entry> | ||
| 248 | <entry>DQPSK modulation</entry> | ||
| 249 | </row><row> | ||
| 250 | <entry id="QAM-4-NR"><constant>QAM_4_NR</constant></entry> | ||
| 251 | <entry>4-QAM-NR modulation</entry> | ||
| 252 | </row> | ||
| 253 | </tbody> | ||
| 254 | </tgroup> | ||
| 255 | </table> | ||
| 256 | </section> | ||
| 257 | |||
| 258 | </section> | ||
| 259 | <section id="DTV-BANDWIDTH-HZ"> | ||
| 260 | <title><constant>DTV_BANDWIDTH_HZ</constant></title> | ||
| 261 | |||
| 262 | <para>Bandwidth for the channel, in HZ.</para> | ||
| 263 | |||
| 264 | <para>Possible values: | ||
| 265 | <constant>1712000</constant>, | ||
| 266 | <constant>5000000</constant>, | ||
| 267 | <constant>6000000</constant>, | ||
| 268 | <constant>7000000</constant>, | ||
| 269 | <constant>8000000</constant>, | ||
| 270 | <constant>10000000</constant>. | ||
| 271 | </para> | ||
| 272 | |||
| 273 | <para>Notes:</para> | ||
| 274 | |||
| 275 | <para>1) For ISDB-T it should be always 6000000Hz (6MHz)</para> | ||
| 276 | <para>2) For ISDB-Tsb it can vary depending on the number of connected segments</para> | ||
| 277 | <para>3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth | ||
| 278 | for DVB-C depends on the symbol rate</para> | ||
| 279 | <para>4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from | ||
| 280 | other parameters (DTV_ISDBT_SB_SEGMENT_IDX, | ||
| 281 | DTV_ISDBT_SB_SEGMENT_COUNT).</para> | ||
| 282 | <para>5) DVB-T supports 6, 7 and 8MHz.</para> | ||
| 283 | <para>6) In addition, DVB-T2 supports 1.172, 5 and 10MHz.</para> | ||
| 284 | </section> | ||
| 285 | <section id="DTV-INVERSION"> | ||
| 286 | <title><constant>DTV_INVERSION</constant></title> | ||
| 287 | |||
| 288 | <para>Specifies if the frontend should do spectral inversion or not.</para> | ||
| 289 | |||
| 290 | <section id="fe-spectral-inversion-t"> | ||
| 291 | <title>enum fe_modulation: Frontend spectral inversion</title> | ||
| 292 | |||
| 293 | <para>This parameter indicates if spectral inversion should be presumed or not. | ||
| 294 | In the automatic setting (<constant>INVERSION_AUTO</constant>) the hardware | ||
| 295 | will try to figure out the correct setting by itself. If the hardware | ||
| 296 | doesn't support, the DVB core will try to lock at the carrier first with | ||
| 297 | inversion off. If it fails, it will try to enable inversion. | ||
| 298 | </para> | ||
| 299 | |||
| 300 | <table pgwide="1" frame="none" id="fe-spectral-inversion"> | ||
| 301 | <title>enum fe_modulation</title> | ||
| 302 | <tgroup cols="2"> | ||
| 303 | &cs-def; | ||
| 304 | <thead> | ||
| 305 | <row> | ||
| 306 | <entry>ID</entry> | ||
| 307 | <entry>Description</entry> | ||
| 308 | </row> | ||
| 309 | </thead> | ||
| 310 | <tbody valign="top"> | ||
| 311 | <row> | ||
| 312 | <entry id="INVERSION-OFF"><constant>INVERSION_OFF</constant></entry> | ||
| 313 | <entry>Don't do spectral band inversion.</entry> | ||
| 314 | </row><row> | ||
| 315 | <entry id="INVERSION-ON"><constant>INVERSION_ON</constant></entry> | ||
| 316 | <entry>Do spectral band inversion.</entry> | ||
| 317 | </row><row> | ||
| 318 | <entry id="INVERSION-AUTO"><constant>INVERSION_AUTO</constant></entry> | ||
| 319 | <entry>Autodetect spectral band inversion.</entry> | ||
| 320 | </row> | ||
| 321 | </tbody> | ||
| 322 | </tgroup> | ||
| 323 | </table> | ||
| 324 | </section> | ||
| 325 | |||
| 326 | </section> | ||
| 327 | <section id="DTV-DISEQC-MASTER"> | ||
| 328 | <title><constant>DTV_DISEQC_MASTER</constant></title> | ||
| 329 | <para>Currently not implemented.</para> | ||
| 330 | </section> | ||
| 331 | <section id="DTV-SYMBOL-RATE"> | ||
| 332 | <title><constant>DTV_SYMBOL_RATE</constant></title> | ||
| 333 | <para>Digital TV symbol rate, in bauds (symbols/second). Used on cable standards.</para> | ||
| 334 | </section> | ||
| 335 | <section id="DTV-INNER-FEC"> | ||
| 336 | <title><constant>DTV_INNER_FEC</constant></title> | ||
| 337 | <para>Used cable/satellite transmissions. The acceptable values are: | ||
| 338 | </para> | ||
| 339 | <section id="fe-code-rate-t"> | ||
| 340 | <title>enum fe_code_rate: type of the Forward Error Correction.</title> | ||
| 341 | |||
| 342 | <table pgwide="1" frame="none" id="fe-code-rate"> | ||
| 343 | <title>enum fe_code_rate</title> | ||
| 344 | <tgroup cols="2"> | ||
| 345 | &cs-def; | ||
| 346 | <thead> | ||
| 347 | <row> | ||
| 348 | <entry>ID</entry> | ||
| 349 | <entry>Description</entry> | ||
| 350 | </row> | ||
| 351 | </thead> | ||
| 352 | <tbody valign="top"> | ||
| 353 | <row> | ||
| 354 | <entry id="FEC-NONE"><constant>FEC_NONE</constant></entry> | ||
| 355 | <entry>No Forward Error Correction Code</entry> | ||
| 356 | </row><row> | ||
| 357 | <entry id="FEC-AUTO"><constant>FEC_AUTO</constant></entry> | ||
| 358 | <entry>Autodetect Error Correction Code</entry> | ||
| 359 | </row><row> | ||
| 360 | <entry id="FEC-1-2"><constant>FEC_1_2</constant></entry> | ||
| 361 | <entry>Forward Error Correction Code 1/2</entry> | ||
| 362 | </row><row> | ||
| 363 | <entry id="FEC-2-3"><constant>FEC_2_3</constant></entry> | ||
| 364 | <entry>Forward Error Correction Code 2/3</entry> | ||
| 365 | </row><row> | ||
| 366 | <entry id="FEC-3-4"><constant>FEC_3_4</constant></entry> | ||
| 367 | <entry>Forward Error Correction Code 3/4</entry> | ||
| 368 | </row><row> | ||
| 369 | <entry id="FEC-4-5"><constant>FEC_4_5</constant></entry> | ||
| 370 | <entry>Forward Error Correction Code 4/5</entry> | ||
| 371 | </row><row> | ||
| 372 | <entry id="FEC-5-6"><constant>FEC_5_6</constant></entry> | ||
| 373 | <entry>Forward Error Correction Code 5/6</entry> | ||
| 374 | </row><row> | ||
| 375 | <entry id="FEC-6-7"><constant>FEC_6_7</constant></entry> | ||
| 376 | <entry>Forward Error Correction Code 6/7</entry> | ||
| 377 | </row><row> | ||
| 378 | <entry id="FEC-7-8"><constant>FEC_7_8</constant></entry> | ||
| 379 | <entry>Forward Error Correction Code 7/8</entry> | ||
| 380 | </row><row> | ||
| 381 | <entry id="FEC-8-9"><constant>FEC_8_9</constant></entry> | ||
| 382 | <entry>Forward Error Correction Code 8/9</entry> | ||
| 383 | </row><row> | ||
| 384 | <entry id="FEC-9-10"><constant>FEC_9_10</constant></entry> | ||
| 385 | <entry>Forward Error Correction Code 9/10</entry> | ||
| 386 | </row><row> | ||
| 387 | <entry id="FEC-2-5"><constant>FEC_2_5</constant></entry> | ||
| 388 | <entry>Forward Error Correction Code 2/5</entry> | ||
| 389 | </row><row> | ||
| 390 | <entry id="FEC-3-5"><constant>FEC_3_5</constant></entry> | ||
| 391 | <entry>Forward Error Correction Code 3/5</entry> | ||
| 392 | </row> | ||
| 393 | </tbody> | ||
| 394 | </tgroup> | ||
| 395 | </table> | ||
| 396 | </section> | ||
| 397 | </section> | ||
| 398 | <section id="DTV-VOLTAGE"> | ||
| 399 | <title><constant>DTV_VOLTAGE</constant></title> | ||
| 400 | <para>The voltage is usually used with non-DiSEqC capable LNBs to switch | ||
| 401 | the polarzation (horizontal/vertical). When using DiSEqC epuipment this | ||
| 402 | voltage has to be switched consistently to the DiSEqC commands as | ||
| 403 | described in the DiSEqC spec.</para> | ||
| 404 | |||
| 405 | <table pgwide="1" frame="none" id="fe-sec-voltage"> | ||
| 406 | <title id="fe-sec-voltage-t">enum fe_sec_voltage</title> | ||
| 407 | <tgroup cols="2"> | ||
| 408 | &cs-def; | ||
| 409 | <thead> | ||
| 410 | <row> | ||
| 411 | <entry>ID</entry> | ||
| 412 | <entry>Description</entry> | ||
| 413 | </row> | ||
| 414 | </thead> | ||
| 415 | <tbody valign="top"> | ||
| 416 | <row> | ||
| 417 | <entry align="char" id="SEC-VOLTAGE-13"><constant>SEC_VOLTAGE_13</constant></entry> | ||
| 418 | <entry align="char">Set DC voltage level to 13V</entry> | ||
| 419 | </row><row> | ||
| 420 | <entry align="char" id="SEC-VOLTAGE-18"><constant>SEC_VOLTAGE_18</constant></entry> | ||
| 421 | <entry align="char">Set DC voltage level to 18V</entry> | ||
| 422 | </row><row> | ||
| 423 | <entry align="char" id="SEC-VOLTAGE-OFF"><constant>SEC_VOLTAGE_OFF</constant></entry> | ||
| 424 | <entry align="char">Don't send any voltage to the antenna</entry> | ||
| 425 | </row> | ||
| 426 | </tbody> | ||
| 427 | </tgroup> | ||
| 428 | </table> | ||
| 429 | </section> | ||
| 430 | <section id="DTV-TONE"> | ||
| 431 | <title><constant>DTV_TONE</constant></title> | ||
| 432 | <para>Currently not used.</para> | ||
| 433 | </section> | ||
| 434 | <section id="DTV-PILOT"> | ||
| 435 | <title><constant>DTV_PILOT</constant></title> | ||
| 436 | <para>Sets DVB-S2 pilot</para> | ||
| 437 | <section id="fe-pilot-t"> | ||
| 438 | <title>fe_pilot type</title> | ||
| 439 | <table pgwide="1" frame="none" id="fe-pilot"> | ||
| 440 | <title>enum fe_pilot</title> | ||
| 441 | <tgroup cols="2"> | ||
| 442 | &cs-def; | ||
| 443 | <thead> | ||
| 444 | <row> | ||
| 445 | <entry>ID</entry> | ||
| 446 | <entry>Description</entry> | ||
| 447 | </row> | ||
| 448 | </thead> | ||
| 449 | <tbody valign="top"> | ||
| 450 | <row> | ||
| 451 | <entry align="char" id="PILOT-ON"><constant>PILOT_ON</constant></entry> | ||
| 452 | <entry align="char">Pilot tones enabled</entry> | ||
| 453 | </row><row> | ||
| 454 | <entry align="char" id="PILOT-OFF"><constant>PILOT_OFF</constant></entry> | ||
| 455 | <entry align="char">Pilot tones disabled</entry> | ||
| 456 | </row><row> | ||
| 457 | <entry align="char" id="PILOT-AUTO"><constant>PILOT_AUTO</constant></entry> | ||
| 458 | <entry align="char">Autodetect pilot tones</entry> | ||
| 459 | </row> | ||
| 460 | </tbody> | ||
| 461 | </tgroup> | ||
| 462 | </table> | ||
| 463 | </section> | ||
| 464 | </section> | ||
| 465 | <section id="DTV-ROLLOFF"> | ||
| 466 | <title><constant>DTV_ROLLOFF</constant></title> | ||
| 467 | <para>Sets DVB-S2 rolloff</para> | ||
| 468 | |||
| 469 | <section id="fe-rolloff-t"> | ||
| 470 | <title>fe_rolloff type</title> | ||
| 471 | <table pgwide="1" frame="none" id="fe-rolloff"> | ||
| 472 | <title>enum fe_rolloff</title> | ||
| 473 | <tgroup cols="2"> | ||
| 474 | &cs-def; | ||
| 475 | <thead> | ||
| 476 | <row> | ||
| 477 | <entry>ID</entry> | ||
| 478 | <entry>Description</entry> | ||
| 479 | </row> | ||
| 480 | </thead> | ||
| 481 | <tbody valign="top"> | ||
| 482 | <row> | ||
| 483 | <entry align="char" id="ROLLOFF-35"><constant>ROLLOFF_35</constant></entry> | ||
| 484 | <entry align="char">Roloff factor: α=35%</entry> | ||
| 485 | </row><row> | ||
| 486 | <entry align="char" id="ROLLOFF-20"><constant>ROLLOFF_20</constant></entry> | ||
| 487 | <entry align="char">Roloff factor: α=20%</entry> | ||
| 488 | </row><row> | ||
| 489 | <entry align="char" id="ROLLOFF-25"><constant>ROLLOFF_25</constant></entry> | ||
| 490 | <entry align="char">Roloff factor: α=25%</entry> | ||
| 491 | </row><row> | ||
| 492 | <entry align="char" id="ROLLOFF-AUTO"><constant>ROLLOFF_AUTO</constant></entry> | ||
| 493 | <entry align="char">Auto-detect the roloff factor.</entry> | ||
| 494 | </row> | ||
| 495 | </tbody> | ||
| 496 | </tgroup> | ||
| 497 | </table> | ||
| 498 | </section> | ||
| 499 | </section> | ||
| 500 | <section id="DTV-DISEQC-SLAVE-REPLY"> | ||
| 501 | <title><constant>DTV_DISEQC_SLAVE_REPLY</constant></title> | ||
| 502 | <para>Currently not implemented.</para> | ||
| 503 | </section> | ||
| 504 | <section id="DTV-FE-CAPABILITY-COUNT"> | ||
| 505 | <title><constant>DTV_FE_CAPABILITY_COUNT</constant></title> | ||
| 506 | <para>Currently not implemented.</para> | ||
| 507 | </section> | ||
| 508 | <section id="DTV-FE-CAPABILITY"> | ||
| 509 | <title><constant>DTV_FE_CAPABILITY</constant></title> | ||
| 510 | <para>Currently not implemented.</para> | ||
| 511 | </section> | ||
| 512 | <section id="DTV-DELIVERY-SYSTEM"> | ||
| 513 | <title><constant>DTV_DELIVERY_SYSTEM</constant></title> | ||
| 514 | <para>Specifies the type of Delivery system</para> | ||
| 515 | <section id="fe-delivery-system-t"> | ||
| 516 | <title>fe_delivery_system type</title> | ||
| 517 | <para>Possible values: </para> | ||
| 518 | |||
| 519 | <table pgwide="1" frame="none" id="fe-delivery-system"> | ||
| 520 | <title>enum fe_delivery_system</title> | ||
| 521 | <tgroup cols="2"> | ||
| 522 | &cs-def; | ||
| 523 | <thead> | ||
| 524 | <row> | ||
| 525 | <entry>ID</entry> | ||
| 526 | <entry>Description</entry> | ||
| 527 | </row> | ||
| 528 | </thead> | ||
| 529 | <tbody valign="top"> | ||
| 530 | <row> | ||
| 531 | <entry id="SYS-UNDEFINED"><constant>SYS_UNDEFINED</constant></entry> | ||
| 532 | <entry>Undefined standard. Generally, indicates an error</entry> | ||
| 533 | </row><row> | ||
| 534 | <entry id="SYS-DVBC-ANNEX-A"><constant>SYS_DVBC_ANNEX_A</constant></entry> | ||
| 535 | <entry>Cable TV: DVB-C following ITU-T J.83 Annex A spec</entry> | ||
| 536 | </row><row> | ||
| 537 | <entry id="SYS-DVBC-ANNEX-B"><constant>SYS_DVBC_ANNEX_B</constant></entry> | ||
| 538 | <entry>Cable TV: DVB-C following ITU-T J.83 Annex B spec (ClearQAM)</entry> | ||
| 539 | </row><row> | ||
| 540 | <entry id="SYS-DVBC-ANNEX-C"><constant>SYS_DVBC_ANNEX_C</constant></entry> | ||
| 541 | <entry>Cable TV: DVB-C following ITU-T J.83 Annex C spec</entry> | ||
| 542 | </row><row> | ||
| 543 | <entry id="SYS-ISDBC"><constant>SYS_ISDBC</constant></entry> | ||
| 544 | <entry>Cable TV: ISDB-C (no drivers yet)</entry> | ||
| 545 | </row><row> | ||
| 546 | <entry id="SYS-DVBT"><constant>SYS_DVBT</constant></entry> | ||
| 547 | <entry>Terrestral TV: DVB-T</entry> | ||
| 548 | </row><row> | ||
| 549 | <entry id="SYS-DVBT2"><constant>SYS_DVBT2</constant></entry> | ||
| 550 | <entry>Terrestral TV: DVB-T2</entry> | ||
| 551 | </row><row> | ||
| 552 | <entry id="SYS-ISDBT"><constant>SYS_ISDBT</constant></entry> | ||
| 553 | <entry>Terrestral TV: ISDB-T</entry> | ||
| 554 | </row><row> | ||
| 555 | <entry id="SYS-ATSC"><constant>SYS_ATSC</constant></entry> | ||
| 556 | <entry>Terrestral TV: ATSC</entry> | ||
| 557 | </row><row> | ||
| 558 | <entry id="SYS-ATSCMH"><constant>SYS_ATSCMH</constant></entry> | ||
| 559 | <entry>Terrestral TV (mobile): ATSC-M/H</entry> | ||
| 560 | </row><row> | ||
| 561 | <entry id="SYS-DTMB"><constant>SYS_DTMB</constant></entry> | ||
| 562 | <entry>Terrestrial TV: DTMB</entry> | ||
| 563 | </row><row> | ||
| 564 | <entry id="SYS-DVBS"><constant>SYS_DVBS</constant></entry> | ||
| 565 | <entry>Satellite TV: DVB-S</entry> | ||
| 566 | </row><row> | ||
| 567 | <entry id="SYS-DVBS2"><constant>SYS_DVBS2</constant></entry> | ||
| 568 | <entry>Satellite TV: DVB-S2</entry> | ||
| 569 | </row><row> | ||
| 570 | <entry id="SYS-TURBO"><constant>SYS_TURBO</constant></entry> | ||
| 571 | <entry>Satellite TV: DVB-S Turbo</entry> | ||
| 572 | </row><row> | ||
| 573 | <entry id="SYS-ISDBS"><constant>SYS_ISDBS</constant></entry> | ||
| 574 | <entry>Satellite TV: ISDB-S</entry> | ||
| 575 | </row><row> | ||
| 576 | <entry id="SYS-DAB"><constant>SYS_DAB</constant></entry> | ||
| 577 | <entry>Digital audio: DAB (not fully supported)</entry> | ||
| 578 | </row><row> | ||
| 579 | <entry id="SYS-DSS"><constant>SYS_DSS</constant></entry> | ||
| 580 | <entry>Satellite TV:"DSS (not fully supported)</entry> | ||
| 581 | </row><row> | ||
| 582 | <entry id="SYS-CMMB"><constant>SYS_CMMB</constant></entry> | ||
| 583 | <entry>Terrestral TV (mobile):CMMB (not fully supported)</entry> | ||
| 584 | </row><row> | ||
| 585 | <entry id="SYS-DVBH"><constant>SYS_DVBH</constant></entry> | ||
| 586 | <entry>Terrestral TV (mobile): DVB-H (standard deprecated)</entry> | ||
| 587 | </row> | ||
| 588 | </tbody> | ||
| 589 | </tgroup> | ||
| 590 | </table> | ||
| 591 | |||
| 592 | |||
| 593 | </section> | ||
| 594 | </section> | ||
| 595 | <section id="DTV-ISDBT-PARTIAL-RECEPTION"> | ||
| 596 | <title><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></title> | ||
| 597 | |||
| 598 | <para>If <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '0' this bit-field represents whether | ||
| 599 | the channel is in partial reception mode or not.</para> | ||
| 600 | |||
| 601 | <para>If '1' <constant>DTV_ISDBT_LAYERA_*</constant> values are assigned to the center segment and | ||
| 602 | <constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant> has to be '1'.</para> | ||
| 603 | |||
| 604 | <para>If in addition <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1' | ||
| 605 | <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> represents whether this ISDB-Tsb channel | ||
| 606 | is consisting of one segment and layer or three segments and two layers.</para> | ||
| 607 | |||
| 608 | <para>Possible values: 0, 1, -1 (AUTO)</para> | ||
| 609 | </section> | ||
| 610 | <section id="DTV-ISDBT-SOUND-BROADCASTING"> | ||
| 611 | <title><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></title> | ||
| 612 | |||
| 613 | <para>This field represents whether the other DTV_ISDBT_*-parameters are | ||
| 614 | referring to an ISDB-T and an ISDB-Tsb channel. (See also | ||
| 615 | <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>).</para> | ||
| 616 | |||
| 617 | <para>Possible values: 0, 1, -1 (AUTO)</para> | ||
| 618 | </section> | ||
| 619 | <section id="DTV-ISDBT-SB-SUBCHANNEL-ID"> | ||
| 620 | <title><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></title> | ||
| 621 | |||
| 622 | <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para> | ||
| 623 | |||
| 624 | <para>(Note of the author: This might not be the correct description of the | ||
| 625 | <constant>SUBCHANNEL-ID</constant> in all details, but it is my understanding of the technical | ||
| 626 | background needed to program a device)</para> | ||
| 627 | |||
| 628 | <para>An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a | ||
| 629 | set of connected ISDB-Tsb channels. In this set of channels every | ||
| 630 | channel can be received independently. The number of connected | ||
| 631 | ISDB-Tsb segment can vary, e.g. depending on the frequency spectrum | ||
| 632 | bandwidth available.</para> | ||
| 633 | |||
| 634 | <para>Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The | ||
| 635 | broadcaster has several possibilities to put those channels in the | ||
| 636 | air: Assuming a normal 13-segment ISDB-T spectrum he can align the 8 | ||
| 637 | segments from position 1-8 to 5-13 or anything in between.</para> | ||
| 638 | |||
| 639 | <para>The underlying layer of segments are subchannels: each segment is | ||
| 640 | consisting of several subchannels with a predefined IDs. A sub-channel | ||
| 641 | is used to help the demodulator to synchronize on the channel.</para> | ||
| 642 | |||
| 643 | <para>An ISDB-T channel is always centered over all sub-channels. As for | ||
| 644 | the example above, in ISDB-Tsb it is no longer as simple as that.</para> | ||
| 645 | |||
| 646 | <para><constant>The DTV_ISDBT_SB_SUBCHANNEL_ID</constant> parameter is used to give the | ||
| 647 | sub-channel ID of the segment to be demodulated.</para> | ||
| 648 | |||
| 649 | <para>Possible values: 0 .. 41, -1 (AUTO)</para> | ||
| 650 | </section> | ||
| 651 | <section id="DTV-ISDBT-SB-SEGMENT-IDX"> | ||
| 652 | <title><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></title> | ||
| 653 | <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para> | ||
| 654 | <para><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant> gives the index of the segment to be | ||
| 655 | demodulated for an ISDB-Tsb channel where several of them are | ||
| 656 | transmitted in the connected manner.</para> | ||
| 657 | <para>Possible values: 0 .. <constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> - 1</para> | ||
| 658 | <para>Note: This value cannot be determined by an automatic channel search.</para> | ||
| 659 | </section> | ||
| 660 | <section id="DTV-ISDBT-SB-SEGMENT-COUNT"> | ||
| 661 | <title><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></title> | ||
| 662 | <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para> | ||
| 663 | <para><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> gives the total count of connected ISDB-Tsb | ||
| 664 | channels.</para> | ||
| 665 | <para>Possible values: 1 .. 13</para> | ||
| 666 | <para>Note: This value cannot be determined by an automatic channel search.</para> | ||
| 667 | </section> | ||
| 668 | <section id="isdb-hierq-layers"> | ||
| 669 | <title><constant>DTV-ISDBT-LAYER*</constant> parameters</title> | ||
| 670 | <para>ISDB-T channels can be coded hierarchically. As opposed to DVB-T in | ||
| 671 | ISDB-T hierarchical layers can be decoded simultaneously. For that | ||
| 672 | reason a ISDB-T demodulator has 3 Viterbi and 3 Reed-Solomon decoders.</para> | ||
| 673 | <para>ISDB-T has 3 hierarchical layers which each can use a part of the | ||
| 674 | available segments. The total number of segments over all layers has | ||
| 675 | to 13 in ISDB-T.</para> | ||
| 676 | <para>There are 3 parameter sets, for Layers A, B and C.</para> | ||
| 677 | <section id="DTV-ISDBT-LAYER-ENABLED"> | ||
| 678 | <title><constant>DTV_ISDBT_LAYER_ENABLED</constant></title> | ||
| 679 | <para>Hierarchical reception in ISDB-T is achieved by enabling or disabling | ||
| 680 | layers in the decoding process. Setting all bits of | ||
| 681 | <constant>DTV_ISDBT_LAYER_ENABLED</constant> to '1' forces all layers (if applicable) to be | ||
| 682 | demodulated. This is the default.</para> | ||
| 683 | <para>If the channel is in the partial reception mode | ||
| 684 | (<constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> = 1) the central segment can be decoded | ||
| 685 | independently of the other 12 segments. In that mode layer A has to | ||
| 686 | have a <constant>SEGMENT_COUNT</constant> of 1.</para> | ||
| 687 | <para>In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb | ||
| 688 | according to <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>. <constant>SEGMENT_COUNT</constant> must be filled | ||
| 689 | accordingly.</para> | ||
| 690 | <para>Possible values: 0x1, 0x2, 0x4 (|-able)</para> | ||
| 691 | <para><constant>DTV_ISDBT_LAYER_ENABLED[0:0]</constant> - layer A</para> | ||
| 692 | <para><constant>DTV_ISDBT_LAYER_ENABLED[1:1]</constant> - layer B</para> | ||
| 693 | <para><constant>DTV_ISDBT_LAYER_ENABLED[2:2]</constant> - layer C</para> | ||
| 694 | <para><constant>DTV_ISDBT_LAYER_ENABLED[31:3]</constant> unused</para> | ||
| 695 | </section> | ||
| 696 | <section id="DTV-ISDBT-LAYER-FEC"> | ||
| 697 | <title><constant>DTV_ISDBT_LAYER*_FEC</constant></title> | ||
| 698 | <para>Possible values: <constant>FEC_AUTO</constant>, <constant>FEC_1_2</constant>, <constant>FEC_2_3</constant>, <constant>FEC_3_4</constant>, <constant>FEC_5_6</constant>, <constant>FEC_7_8</constant></para> | ||
| 699 | </section> | ||
| 700 | <section id="DTV-ISDBT-LAYER-MODULATION"> | ||
| 701 | <title><constant>DTV_ISDBT_LAYER*_MODULATION</constant></title> | ||
| 702 | <para>Possible values: <constant>QAM_AUTO</constant>, QP<constant>SK, QAM_16</constant>, <constant>QAM_64</constant>, <constant>DQPSK</constant></para> | ||
| 703 | <para>Note: If layer C is <constant>DQPSK</constant> layer B has to be <constant>DQPSK</constant>. If layer B is <constant>DQPSK</constant> | ||
| 704 | and <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>=0 layer has to be <constant>DQPSK</constant>.</para> | ||
| 705 | </section> | ||
| 706 | <section id="DTV-ISDBT-LAYER-SEGMENT-COUNT"> | ||
| 707 | <title><constant>DTV_ISDBT_LAYER*_SEGMENT_COUNT</constant></title> | ||
| 708 | <para>Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)</para> | ||
| 709 | <para>Note: Truth table for <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> and | ||
| 710 | <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> and <constant>LAYER</constant>*_SEGMENT_COUNT</para> | ||
| 711 | <informaltable id="isdbt-layer_seg-cnt-table"> | ||
| 712 | <tgroup cols="6"> | ||
| 713 | <tbody> | ||
| 714 | <row> | ||
| 715 | <entry>PR</entry> | ||
| 716 | <entry>SB</entry> | ||
| 717 | <entry>Layer A width</entry> | ||
| 718 | <entry>Layer B width</entry> | ||
| 719 | <entry>Layer C width</entry> | ||
| 720 | <entry>total width</entry> | ||
| 721 | </row> | ||
| 722 | <row> | ||
| 723 | <entry>0</entry> | ||
| 724 | <entry>0</entry> | ||
| 725 | <entry>1 .. 13</entry> | ||
| 726 | <entry>1 .. 13</entry> | ||
| 727 | <entry>1 .. 13</entry> | ||
| 728 | <entry>13</entry> | ||
| 729 | </row> | ||
| 730 | <row> | ||
| 731 | <entry>1</entry> | ||
| 732 | <entry>0</entry> | ||
| 733 | <entry>1</entry> | ||
| 734 | <entry>1 .. 13</entry> | ||
| 735 | <entry>1 .. 13</entry> | ||
| 736 | <entry>13</entry> | ||
| 737 | </row> | ||
| 738 | <row> | ||
| 739 | <entry>0</entry> | ||
| 740 | <entry>1</entry> | ||
| 741 | <entry>1</entry> | ||
| 742 | <entry>0</entry> | ||
| 743 | <entry>0</entry> | ||
| 744 | <entry>1</entry> | ||
| 745 | </row> | ||
| 746 | <row> | ||
| 747 | <entry>1</entry> | ||
| 748 | <entry>1</entry> | ||
| 749 | <entry>1</entry> | ||
| 750 | <entry>2</entry> | ||
| 751 | <entry>0</entry> | ||
| 752 | <entry>13</entry> | ||
| 753 | </row> | ||
| 754 | </tbody> | ||
| 755 | </tgroup> | ||
| 756 | </informaltable> | ||
| 757 | </section> | ||
| 758 | <section id="DTV-ISDBT-LAYER-TIME-INTERLEAVING"> | ||
| 759 | <title><constant>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</constant></title> | ||
| 760 | <para>Valid values: 0, 1, 2, 4, -1 (AUTO)</para> | ||
| 761 | <para>when DTV_ISDBT_SOUND_BROADCASTING is active, value 8 is also valid.</para> | ||
| 762 | <para>Note: The real time interleaving length depends on the mode (fft-size). The values | ||
| 763 | here are referring to what can be found in the TMCC-structure, as shown in the table below.</para> | ||
| 764 | <informaltable id="isdbt-layer-interleaving-table"> | ||
| 765 | <tgroup cols="4" align="center"> | ||
| 766 | <tbody> | ||
| 767 | <row> | ||
| 768 | <entry>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</entry> | ||
| 769 | <entry>Mode 1 (2K FFT)</entry> | ||
| 770 | <entry>Mode 2 (4K FFT)</entry> | ||
| 771 | <entry>Mode 3 (8K FFT)</entry> | ||
| 772 | </row> | ||
| 773 | <row> | ||
| 774 | <entry>0</entry> | ||
| 775 | <entry>0</entry> | ||
| 776 | <entry>0</entry> | ||
| 777 | <entry>0</entry> | ||
| 778 | </row> | ||
| 779 | <row> | ||
| 780 | <entry>1</entry> | ||
| 781 | <entry>4</entry> | ||
| 782 | <entry>2</entry> | ||
| 783 | <entry>1</entry> | ||
| 784 | </row> | ||
| 785 | <row> | ||
| 786 | <entry>2</entry> | ||
| 787 | <entry>8</entry> | ||
| 788 | <entry>4</entry> | ||
| 789 | <entry>2</entry> | ||
| 790 | </row> | ||
| 791 | <row> | ||
| 792 | <entry>4</entry> | ||
| 793 | <entry>16</entry> | ||
| 794 | <entry>8</entry> | ||
| 795 | <entry>4</entry> | ||
| 796 | </row> | ||
| 797 | </tbody> | ||
| 798 | </tgroup> | ||
| 799 | </informaltable> | ||
| 800 | </section> | ||
| 801 | <section id="DTV-ATSCMH-FIC-VER"> | ||
| 802 | <title><constant>DTV_ATSCMH_FIC_VER</constant></title> | ||
| 803 | <para>Version number of the FIC (Fast Information Channel) signaling data.</para> | ||
| 804 | <para>FIC is used for relaying information to allow rapid service acquisition by the receiver.</para> | ||
| 805 | <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para> | ||
| 806 | </section> | ||
| 807 | <section id="DTV-ATSCMH-PARADE-ID"> | ||
| 808 | <title><constant>DTV_ATSCMH_PARADE_ID</constant></title> | ||
| 809 | <para>Parade identification number</para> | ||
| 810 | <para>A parade is a collection of up to eight MH groups, conveying one or two ensembles.</para> | ||
| 811 | <para>Possible values: 0, 1, 2, 3, ..., 126, 127</para> | ||
| 812 | </section> | ||
| 813 | <section id="DTV-ATSCMH-NOG"> | ||
| 814 | <title><constant>DTV_ATSCMH_NOG</constant></title> | ||
| 815 | <para>Number of MH groups per MH subframe for a designated parade.</para> | ||
| 816 | <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para> | ||
| 817 | </section> | ||
| 818 | <section id="DTV-ATSCMH-TNOG"> | ||
| 819 | <title><constant>DTV_ATSCMH_TNOG</constant></title> | ||
| 820 | <para>Total number of MH groups including all MH groups belonging to all MH parades in one MH subframe.</para> | ||
| 821 | <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para> | ||
| 822 | </section> | ||
| 823 | <section id="DTV-ATSCMH-SGN"> | ||
| 824 | <title><constant>DTV_ATSCMH_SGN</constant></title> | ||
| 825 | <para>Start group number.</para> | ||
| 826 | <para>Possible values: 0, 1, 2, 3, ..., 14, 15</para> | ||
| 827 | </section> | ||
| 828 | <section id="DTV-ATSCMH-PRC"> | ||
| 829 | <title><constant>DTV_ATSCMH_PRC</constant></title> | ||
| 830 | <para>Parade repetition cycle.</para> | ||
| 831 | <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para> | ||
| 832 | </section> | ||
| 833 | <section id="DTV-ATSCMH-RS-FRAME-MODE"> | ||
| 834 | <title><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></title> | ||
| 835 | <para>Reed Solomon (RS) frame mode.</para> | ||
| 836 | <para>Possible values are:</para> | ||
| 837 | <table pgwide="1" frame="none" id="atscmh-rs-frame-mode"> | ||
| 838 | <title>enum atscmh_rs_frame_mode</title> | ||
| 839 | <tgroup cols="2"> | ||
| 840 | &cs-def; | ||
| 841 | <thead> | ||
| 842 | <row> | ||
| 843 | <entry>ID</entry> | ||
| 844 | <entry>Description</entry> | ||
| 845 | </row> | ||
| 846 | </thead> | ||
| 847 | <tbody valign="top"> | ||
| 848 | <row> | ||
| 849 | <entry id="ATSCMH-RSFRAME-PRI-ONLY"><constant>ATSCMH_RSFRAME_PRI_ONLY</constant></entry> | ||
| 850 | <entry>Single Frame: There is only a primary RS Frame for all | ||
| 851 | Group Regions.</entry> | ||
| 852 | </row><row> | ||
| 853 | <entry id="ATSCMH-RSFRAME-PRI-SEC"><constant>ATSCMH_RSFRAME_PRI_SEC</constant></entry> | ||
| 854 | <entry>Dual Frame: There are two separate RS Frames: Primary RS | ||
| 855 | Frame for Group Region A and B and Secondary RS Frame for Group | ||
| 856 | Region C and D.</entry> | ||
| 857 | </row> | ||
| 858 | </tbody> | ||
| 859 | </tgroup> | ||
| 860 | </table> | ||
| 861 | </section> | ||
| 862 | <section id="DTV-ATSCMH-RS-FRAME-ENSEMBLE"> | ||
| 863 | <title><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></title> | ||
| 864 | <para>Reed Solomon(RS) frame ensemble.</para> | ||
| 865 | <para>Possible values are:</para> | ||
| 866 | <table pgwide="1" frame="none" id="atscmh-rs-frame-ensemble"> | ||
| 867 | <title>enum atscmh_rs_frame_ensemble</title> | ||
| 868 | <tgroup cols="2"> | ||
| 869 | &cs-def; | ||
| 870 | <thead> | ||
| 871 | <row> | ||
| 872 | <entry>ID</entry> | ||
| 873 | <entry>Description</entry> | ||
| 874 | </row> | ||
| 875 | </thead> | ||
| 876 | <tbody valign="top"> | ||
| 877 | <row> | ||
| 878 | <entry id="ATSCMH-RSFRAME-ENS-PRI"><constant>ATSCMH_RSFRAME_ENS_PRI</constant></entry> | ||
| 879 | <entry>Primary Ensemble.</entry> | ||
| 880 | </row><row> | ||
| 881 | <entry id="ATSCMH-RSFRAME-ENS-SEC"><constant>AATSCMH_RSFRAME_PRI_SEC</constant></entry> | ||
| 882 | <entry>Secondary Ensemble.</entry> | ||
| 883 | </row><row> | ||
| 884 | <entry id="ATSCMH-RSFRAME-RES"><constant>AATSCMH_RSFRAME_RES</constant></entry> | ||
| 885 | <entry>Reserved. Shouldn't be used.</entry> | ||
| 886 | </row> | ||
| 887 | </tbody> | ||
| 888 | </tgroup> | ||
| 889 | </table> | ||
| 890 | </section> | ||
| 891 | <section id="DTV-ATSCMH-RS-CODE-MODE-PRI"> | ||
| 892 | <title><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></title> | ||
| 893 | <para>Reed Solomon (RS) code mode (primary).</para> | ||
| 894 | <para>Possible values are:</para> | ||
| 895 | <table pgwide="1" frame="none" id="atscmh-rs-code-mode"> | ||
| 896 | <title>enum atscmh_rs_code_mode</title> | ||
| 897 | <tgroup cols="2"> | ||
| 898 | &cs-def; | ||
| 899 | <thead> | ||
| 900 | <row> | ||
| 901 | <entry>ID</entry> | ||
| 902 | <entry>Description</entry> | ||
| 903 | </row> | ||
| 904 | </thead> | ||
| 905 | <tbody valign="top"> | ||
| 906 | <row> | ||
| 907 | <entry id="ATSCMH-RSCODE-211-187"><constant>ATSCMH_RSCODE_211_187</constant></entry> | ||
| 908 | <entry>Reed Solomon code (211,187).</entry> | ||
| 909 | </row><row> | ||
| 910 | <entry id="ATSCMH-RSCODE-223-187"><constant>ATSCMH_RSCODE_223_187</constant></entry> | ||
| 911 | <entry>Reed Solomon code (223,187).</entry> | ||
| 912 | </row><row> | ||
| 913 | <entry id="ATSCMH-RSCODE-235-187"><constant>ATSCMH_RSCODE_235_187</constant></entry> | ||
| 914 | <entry>Reed Solomon code (235,187).</entry> | ||
| 915 | </row><row> | ||
| 916 | <entry id="ATSCMH-RSCODE-RES"><constant>ATSCMH_RSCODE_RES</constant></entry> | ||
| 917 | <entry>Reserved. Shouldn't be used.</entry> | ||
| 918 | </row> | ||
| 919 | </tbody> | ||
| 920 | </tgroup> | ||
| 921 | </table> | ||
| 922 | </section> | ||
| 923 | <section id="DTV-ATSCMH-RS-CODE-MODE-SEC"> | ||
| 924 | <title><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></title> | ||
| 925 | <para>Reed Solomon (RS) code mode (secondary).</para> | ||
| 926 | <para>Possible values are the same as documented on | ||
| 927 | &atscmh-rs-code-mode;:</para> | ||
| 928 | </section> | ||
| 929 | <section id="DTV-ATSCMH-SCCC-BLOCK-MODE"> | ||
| 930 | <title><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></title> | ||
| 931 | <para>Series Concatenated Convolutional Code Block Mode.</para> | ||
| 932 | <para>Possible values are:</para> | ||
| 933 | <table pgwide="1" frame="none" id="atscmh-sccc-block-mode"> | ||
| 934 | <title>enum atscmh_scc_block_mode</title> | ||
| 935 | <tgroup cols="2"> | ||
| 936 | &cs-def; | ||
| 937 | <thead> | ||
| 938 | <row> | ||
| 939 | <entry>ID</entry> | ||
| 940 | <entry>Description</entry> | ||
| 941 | </row> | ||
| 942 | </thead> | ||
| 943 | <tbody valign="top"> | ||
| 944 | <row> | ||
| 945 | <entry id="ATSCMH-SCCC-BLK-SEP"><constant>ATSCMH_SCCC_BLK_SEP</constant></entry> | ||
| 946 | <entry>Separate SCCC: the SCCC outer code mode shall be set independently | ||
| 947 | for each Group Region (A, B, C, D)</entry> | ||
| 948 | </row><row> | ||
| 949 | <entry id="ATSCMH-SCCC-BLK-COMB"><constant>ATSCMH_SCCC_BLK_COMB</constant></entry> | ||
| 950 | <entry>Combined SCCC: all four Regions shall have the same SCCC outer | ||
| 951 | code mode.</entry> | ||
| 952 | </row><row> | ||
| 953 | <entry id="ATSCMH-SCCC-BLK-RES"><constant>ATSCMH_SCCC_BLK_RES</constant></entry> | ||
| 954 | <entry>Reserved. Shouldn't be used.</entry> | ||
| 955 | </row> | ||
| 956 | </tbody> | ||
| 957 | </tgroup> | ||
| 958 | </table> | ||
| 959 | </section> | ||
| 960 | <section id="DTV-ATSCMH-SCCC-CODE-MODE-A"> | ||
| 961 | <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></title> | ||
| 962 | <para>Series Concatenated Convolutional Code Rate.</para> | ||
| 963 | <para>Possible values are:</para> | ||
| 964 | <table pgwide="1" frame="none" id="atscmh-sccc-code-mode"> | ||
| 965 | <title>enum atscmh_sccc_code_mode</title> | ||
| 966 | <tgroup cols="2"> | ||
| 967 | &cs-def; | ||
| 968 | <thead> | ||
| 969 | <row> | ||
| 970 | <entry>ID</entry> | ||
| 971 | <entry>Description</entry> | ||
| 972 | </row> | ||
| 973 | </thead> | ||
| 974 | <tbody valign="top"> | ||
| 975 | <row> | ||
| 976 | <entry id="ATSCMH-SCCC-CODE-HLF"><constant>ATSCMH_SCCC_CODE_HLF</constant></entry> | ||
| 977 | <entry>The outer code rate of a SCCC Block is 1/2 rate.</entry> | ||
| 978 | </row><row> | ||
| 979 | <entry id="ATSCMH-SCCC-CODE-QTR"><constant>ATSCMH_SCCC_CODE_QTR</constant></entry> | ||
| 980 | <entry>The outer code rate of a SCCC Block is 1/4 rate.</entry> | ||
| 981 | </row><row> | ||
| 982 | <entry id="ATSCMH-SCCC-CODE-RES"><constant>ATSCMH_SCCC_CODE_RES</constant></entry> | ||
| 983 | <entry>to be documented.</entry> | ||
| 984 | </row> | ||
| 985 | </tbody> | ||
| 986 | </tgroup> | ||
| 987 | </table> | ||
| 988 | </section> | ||
| 989 | <section id="DTV-ATSCMH-SCCC-CODE-MODE-B"> | ||
| 990 | <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></title> | ||
| 991 | <para>Series Concatenated Convolutional Code Rate.</para> | ||
| 992 | <para>Possible values are the same as documented on | ||
| 993 | &atscmh-sccc-code-mode;.</para> | ||
| 994 | </section> | ||
| 995 | <section id="DTV-ATSCMH-SCCC-CODE-MODE-C"> | ||
| 996 | <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></title> | ||
| 997 | <para>Series Concatenated Convolutional Code Rate.</para> | ||
| 998 | <para>Possible values are the same as documented on | ||
| 999 | &atscmh-sccc-code-mode;.</para> | ||
| 1000 | </section> | ||
| 1001 | <section id="DTV-ATSCMH-SCCC-CODE-MODE-D"> | ||
| 1002 | <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></title> | ||
| 1003 | <para>Series Concatenated Convolutional Code Rate.</para> | ||
| 1004 | <para>Possible values are the same as documented on | ||
| 1005 | &atscmh-sccc-code-mode;.</para> | ||
| 1006 | </section> | ||
| 1007 | </section> | ||
| 1008 | <section id="DTV-API-VERSION"> | ||
| 1009 | <title><constant>DTV_API_VERSION</constant></title> | ||
| 1010 | <para>Returns the major/minor version of the DVB API</para> | ||
| 1011 | </section> | ||
| 1012 | <section id="DTV-CODE-RATE-HP"> | ||
| 1013 | <title><constant>DTV_CODE_RATE_HP</constant></title> | ||
| 1014 | <para>Used on terrestrial transmissions. The acceptable values are | ||
| 1015 | the ones described at &fe-transmit-mode-t;. | ||
| 1016 | </para> | ||
| 1017 | </section> | ||
| 1018 | <section id="DTV-CODE-RATE-LP"> | ||
| 1019 | <title><constant>DTV_CODE_RATE_LP</constant></title> | ||
| 1020 | <para>Used on terrestrial transmissions. The acceptable values are | ||
| 1021 | the ones described at &fe-transmit-mode-t;. | ||
| 1022 | </para> | ||
| 1023 | |||
| 1024 | </section> | ||
| 1025 | |||
| 1026 | <section id="DTV-GUARD-INTERVAL"> | ||
| 1027 | <title><constant>DTV_GUARD_INTERVAL</constant></title> | ||
| 1028 | |||
| 1029 | <para>Possible values are:</para> | ||
| 1030 | |||
| 1031 | <section id="fe-guard-interval-t"> | ||
| 1032 | <title>Modulation guard interval</title> | ||
| 1033 | |||
| 1034 | <table pgwide="1" frame="none" id="fe-guard-interval"> | ||
| 1035 | <title>enum fe_guard_interval</title> | ||
| 1036 | <tgroup cols="2"> | ||
| 1037 | &cs-def; | ||
| 1038 | <thead> | ||
| 1039 | <row> | ||
| 1040 | <entry>ID</entry> | ||
| 1041 | <entry>Description</entry> | ||
| 1042 | </row> | ||
| 1043 | </thead> | ||
| 1044 | <tbody valign="top"> | ||
| 1045 | <row> | ||
| 1046 | <entry id="GUARD-INTERVAL-AUTO"><constant>GUARD_INTERVAL_AUTO</constant></entry> | ||
| 1047 | <entry>Autodetect the guard interval</entry> | ||
| 1048 | </row><row> | ||
| 1049 | <entry id="GUARD-INTERVAL-1-128"><constant>GUARD_INTERVAL_1_128</constant></entry> | ||
| 1050 | <entry>Guard interval 1/128</entry> | ||
| 1051 | </row><row> | ||
| 1052 | <entry id="GUARD-INTERVAL-1-32"><constant>GUARD_INTERVAL_1_32</constant></entry> | ||
| 1053 | <entry>Guard interval 1/32</entry> | ||
| 1054 | </row><row> | ||
| 1055 | <entry id="GUARD-INTERVAL-1-16"><constant>GUARD_INTERVAL_1_16</constant></entry> | ||
| 1056 | <entry>Guard interval 1/16</entry> | ||
| 1057 | </row><row> | ||
| 1058 | <entry id="GUARD-INTERVAL-1-8"><constant>GUARD_INTERVAL_1_8</constant></entry> | ||
| 1059 | <entry>Guard interval 1/8</entry> | ||
| 1060 | </row><row> | ||
| 1061 | <entry id="GUARD-INTERVAL-1-4"><constant>GUARD_INTERVAL_1_4</constant></entry> | ||
| 1062 | <entry>Guard interval 1/4</entry> | ||
| 1063 | </row><row> | ||
| 1064 | <entry id="GUARD-INTERVAL-19-128"><constant>GUARD_INTERVAL_19_128</constant></entry> | ||
| 1065 | <entry>Guard interval 19/128</entry> | ||
| 1066 | </row><row> | ||
| 1067 | <entry id="GUARD-INTERVAL-19-256"><constant>GUARD_INTERVAL_19_256</constant></entry> | ||
| 1068 | <entry>Guard interval 19/256</entry> | ||
| 1069 | </row><row> | ||
| 1070 | <entry id="GUARD-INTERVAL-PN420"><constant>GUARD_INTERVAL_PN420</constant></entry> | ||
| 1071 | <entry>PN length 420 (1/4)</entry> | ||
| 1072 | </row><row> | ||
| 1073 | <entry id="GUARD-INTERVAL-PN595"><constant>GUARD_INTERVAL_PN595</constant></entry> | ||
| 1074 | <entry>PN length 595 (1/6)</entry> | ||
| 1075 | </row><row> | ||
| 1076 | <entry id="GUARD-INTERVAL-PN945"><constant>GUARD_INTERVAL_PN945</constant></entry> | ||
| 1077 | <entry>PN length 945 (1/9)</entry> | ||
| 1078 | </row> | ||
| 1079 | </tbody> | ||
| 1080 | </tgroup> | ||
| 1081 | </table> | ||
| 1082 | |||
| 1083 | <para>Notes:</para> | ||
| 1084 | <para>1) If <constant>DTV_GUARD_INTERVAL</constant> is set the <constant>GUARD_INTERVAL_AUTO</constant> the hardware will | ||
| 1085 | try to find the correct guard interval (if capable) and will use TMCC to fill | ||
| 1086 | in the missing parameters.</para> | ||
| 1087 | <para>2) Intervals 1/128, 19/128 and 19/256 are used only for DVB-T2 at present</para> | ||
| 1088 | <para>3) DTMB specifies PN420, PN595 and PN945.</para> | ||
| 1089 | </section> | ||
| 1090 | </section> | ||
| 1091 | <section id="DTV-TRANSMISSION-MODE"> | ||
| 1092 | <title><constant>DTV_TRANSMISSION_MODE</constant></title> | ||
| 1093 | |||
| 1094 | <para>Specifies the number of carriers used by the standard. | ||
| 1095 | This is used only on OFTM-based standards, e. g. | ||
| 1096 | DVB-T/T2, ISDB-T, DTMB</para> | ||
| 1097 | |||
| 1098 | <section id="fe-transmit-mode-t"> | ||
| 1099 | <title>enum fe_transmit_mode: Number of carriers per channel</title> | ||
| 1100 | |||
| 1101 | <table pgwide="1" frame="none" id="fe-transmit-mode"> | ||
| 1102 | <title>enum fe_transmit_mode</title> | ||
| 1103 | <tgroup cols="2"> | ||
| 1104 | &cs-def; | ||
| 1105 | <thead> | ||
| 1106 | <row> | ||
| 1107 | <entry>ID</entry> | ||
| 1108 | <entry>Description</entry> | ||
| 1109 | </row> | ||
| 1110 | </thead> | ||
| 1111 | <tbody valign="top"> | ||
| 1112 | <row> | ||
| 1113 | <entry id="TRANSMISSION-MODE-AUTO"><constant>TRANSMISSION_MODE_AUTO</constant></entry> | ||
| 1114 | <entry>Autodetect transmission mode. The hardware will try to find | ||
| 1115 | the correct FFT-size (if capable) to fill in the missing | ||
| 1116 | parameters.</entry> | ||
| 1117 | </row><row> | ||
| 1118 | <entry id="TRANSMISSION-MODE-1K"><constant>TRANSMISSION_MODE_1K</constant></entry> | ||
| 1119 | <entry>Transmission mode 1K</entry> | ||
| 1120 | </row><row> | ||
| 1121 | <entry id="TRANSMISSION-MODE-2K"><constant>TRANSMISSION_MODE_2K</constant></entry> | ||
| 1122 | <entry>Transmission mode 2K</entry> | ||
| 1123 | </row><row> | ||
| 1124 | <entry id="TRANSMISSION-MODE-8K"><constant>TRANSMISSION_MODE_8K</constant></entry> | ||
| 1125 | <entry>Transmission mode 8K</entry> | ||
| 1126 | </row><row> | ||
| 1127 | <entry id="TRANSMISSION-MODE-4K"><constant>TRANSMISSION_MODE_4K</constant></entry> | ||
| 1128 | <entry>Transmission mode 4K</entry> | ||
| 1129 | </row><row> | ||
| 1130 | <entry id="TRANSMISSION-MODE-16K"><constant>TRANSMISSION_MODE_16K</constant></entry> | ||
| 1131 | <entry>Transmission mode 16K</entry> | ||
| 1132 | </row><row> | ||
| 1133 | <entry id="TRANSMISSION-MODE-32K"><constant>TRANSMISSION_MODE_32K</constant></entry> | ||
| 1134 | <entry>Transmission mode 32K</entry> | ||
| 1135 | </row><row> | ||
| 1136 | <entry id="TRANSMISSION-MODE-C1"><constant>TRANSMISSION_MODE_C1</constant></entry> | ||
| 1137 | <entry>Single Carrier (C=1) transmission mode (DTMB)</entry> | ||
| 1138 | </row><row> | ||
| 1139 | <entry id="TRANSMISSION-MODE-C3780"><constant>TRANSMISSION_MODE_C3780</constant></entry> | ||
| 1140 | <entry>Multi Carrier (C=3780) transmission mode (DTMB)</entry> | ||
| 1141 | </row> | ||
| 1142 | </tbody> | ||
| 1143 | </tgroup> | ||
| 1144 | </table> | ||
| 1145 | |||
| 1146 | |||
| 1147 | <para>Notes:</para> | ||
| 1148 | <para>1) ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called | ||
| 1149 | 'mode' in the standard: Mode 1 is 2K, mode 2 is 4K, mode 3 is 8K</para> | ||
| 1150 | |||
| 1151 | <para>2) If <constant>DTV_TRANSMISSION_MODE</constant> is set the <constant>TRANSMISSION_MODE_AUTO</constant> the | ||
| 1152 | hardware will try to find the correct FFT-size (if capable) and will | ||
| 1153 | use TMCC to fill in the missing parameters.</para> | ||
| 1154 | <para>3) DVB-T specifies 2K and 8K as valid sizes.</para> | ||
| 1155 | <para>4) DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K.</para> | ||
| 1156 | <para>5) DTMB specifies C1 and C3780.</para> | ||
| 1157 | </section> | ||
| 1158 | </section> | ||
| 1159 | <section id="DTV-HIERARCHY"> | ||
| 1160 | <title><constant>DTV_HIERARCHY</constant></title> | ||
| 1161 | <para>Frontend hierarchy</para> | ||
| 1162 | |||
| 1163 | |||
| 1164 | <section id="fe-hierarchy-t"> | ||
| 1165 | <title>Frontend hierarchy</title> | ||
| 1166 | |||
| 1167 | <table pgwide="1" frame="none" id="fe-hierarchy"> | ||
| 1168 | <title>enum fe_hierarchy</title> | ||
| 1169 | <tgroup cols="2"> | ||
| 1170 | &cs-def; | ||
| 1171 | <thead> | ||
| 1172 | <row> | ||
| 1173 | <entry>ID</entry> | ||
| 1174 | <entry>Description</entry> | ||
| 1175 | </row> | ||
| 1176 | </thead> | ||
| 1177 | <tbody valign="top"> | ||
| 1178 | <row> | ||
| 1179 | <entry id="HIERARCHY-NONE"><constant>HIERARCHY_NONE</constant></entry> | ||
| 1180 | <entry>No hierarchy</entry> | ||
| 1181 | </row><row> | ||
| 1182 | <entry id="HIERARCHY-AUTO"><constant>HIERARCHY_AUTO</constant></entry> | ||
| 1183 | <entry>Autodetect hierarchy (if supported)</entry> | ||
| 1184 | </row><row> | ||
| 1185 | <entry id="HIERARCHY-1"><constant>HIERARCHY_1</constant></entry> | ||
| 1186 | <entry>Hierarchy 1</entry> | ||
| 1187 | </row><row> | ||
| 1188 | <entry id="HIERARCHY-2"><constant>HIERARCHY_2</constant></entry> | ||
| 1189 | <entry>Hierarchy 2</entry> | ||
| 1190 | </row><row> | ||
| 1191 | <entry id="HIERARCHY-4"><constant>HIERARCHY_4</constant></entry> | ||
| 1192 | <entry>Hierarchy 4</entry> | ||
| 1193 | </row> | ||
| 1194 | </tbody> | ||
| 1195 | </tgroup> | ||
| 1196 | </table> | ||
| 1197 | </section> | ||
| 1198 | |||
| 1199 | </section> | ||
| 1200 | <section id="DTV-STREAM-ID"> | ||
| 1201 | <title><constant>DTV_STREAM_ID</constant></title> | ||
| 1202 | <para>DVB-S2, DVB-T2 and ISDB-S support the transmission of several | ||
| 1203 | streams on a single transport stream. | ||
| 1204 | This property enables the DVB driver to handle substream filtering, | ||
| 1205 | when supported by the hardware. | ||
| 1206 | By default, substream filtering is disabled. | ||
| 1207 | </para><para> | ||
| 1208 | For DVB-S2 and DVB-T2, the valid substream id range is from 0 to 255. | ||
| 1209 | </para><para> | ||
| 1210 | For ISDB, the valid substream id range is from 1 to 65535. | ||
| 1211 | </para><para> | ||
| 1212 | To disable it, you should use the special macro NO_STREAM_ID_FILTER. | ||
| 1213 | </para><para> | ||
| 1214 | Note: any value outside the id range also disables filtering. | ||
| 1215 | </para> | ||
| 1216 | </section> | ||
| 1217 | <section id="DTV-DVBT2-PLP-ID-LEGACY"> | ||
| 1218 | <title><constant>DTV_DVBT2_PLP_ID_LEGACY</constant></title> | ||
| 1219 | <para>Obsolete, replaced with DTV_STREAM_ID.</para> | ||
| 1220 | </section> | ||
| 1221 | <section id="DTV-ENUM-DELSYS"> | ||
| 1222 | <title><constant>DTV_ENUM_DELSYS</constant></title> | ||
| 1223 | <para>A Multi standard frontend needs to advertise the delivery systems provided. | ||
| 1224 | Applications need to enumerate the provided delivery systems, before using | ||
| 1225 | any other operation with the frontend. Prior to it's introduction, | ||
| 1226 | FE_GET_INFO was used to determine a frontend type. A frontend which | ||
| 1227 | provides more than a single delivery system, FE_GET_INFO doesn't help much. | ||
| 1228 | Applications which intends to use a multistandard frontend must enumerate | ||
| 1229 | the delivery systems associated with it, rather than trying to use | ||
| 1230 | FE_GET_INFO. In the case of a legacy frontend, the result is just the same | ||
| 1231 | as with FE_GET_INFO, but in a more structured format </para> | ||
| 1232 | </section> | ||
| 1233 | <section id="DTV-INTERLEAVING"> | ||
| 1234 | <title><constant>DTV_INTERLEAVING</constant></title> | ||
| 1235 | |||
| 1236 | <para>Time interleaving to be used. Currently, used only on DTMB.</para> | ||
| 1237 | |||
| 1238 | <table pgwide="1" frame="none" id="fe-interleaving"> | ||
| 1239 | <title>enum fe_interleaving</title> | ||
| 1240 | <tgroup cols="2"> | ||
| 1241 | &cs-def; | ||
| 1242 | <thead> | ||
| 1243 | <row> | ||
| 1244 | <entry>ID</entry> | ||
| 1245 | <entry>Description</entry> | ||
| 1246 | </row> | ||
| 1247 | </thead> | ||
| 1248 | <tbody valign="top"> | ||
| 1249 | <row> | ||
| 1250 | <entry id="INTERLEAVING-NONE"><constant>INTERLEAVING_NONE</constant></entry> | ||
| 1251 | <entry>No interleaving.</entry> | ||
| 1252 | </row><row> | ||
| 1253 | <entry id="INTERLEAVING-AUTO"><constant>INTERLEAVING_AUTO</constant></entry> | ||
| 1254 | <entry>Auto-detect interleaving.</entry> | ||
| 1255 | </row><row> | ||
| 1256 | <entry id="INTERLEAVING-240"><constant>INTERLEAVING_240</constant></entry> | ||
| 1257 | <entry>Interleaving of 240 symbols.</entry> | ||
| 1258 | </row><row> | ||
| 1259 | <entry id="INTERLEAVING-720"><constant>INTERLEAVING_720</constant></entry> | ||
| 1260 | <entry>Interleaving of 720 symbols.</entry> | ||
| 1261 | </row> | ||
| 1262 | </tbody> | ||
| 1263 | </tgroup> | ||
| 1264 | </table> | ||
| 1265 | |||
| 1266 | </section> | ||
| 1267 | <section id="DTV-LNA"> | ||
| 1268 | <title><constant>DTV_LNA</constant></title> | ||
| 1269 | <para>Low-noise amplifier.</para> | ||
| 1270 | <para>Hardware might offer controllable LNA which can be set manually | ||
| 1271 | using that parameter. Usually LNA could be found only from | ||
| 1272 | terrestrial devices if at all.</para> | ||
| 1273 | <para>Possible values: 0, 1, LNA_AUTO</para> | ||
| 1274 | <para>0, LNA off</para> | ||
| 1275 | <para>1, LNA on</para> | ||
| 1276 | <para>use the special macro LNA_AUTO to set LNA auto</para> | ||
| 1277 | </section> | ||
| 1278 | </section> | ||
| 1279 | |||
| 1280 | <section id="frontend-stat-properties"> | ||
| 1281 | <title>Frontend statistics indicators</title> | ||
| 1282 | <para>The values are returned via <constant>dtv_property.stat</constant>. | ||
| 1283 | If the property is supported, <constant>dtv_property.stat.len</constant> is bigger than zero.</para> | ||
| 1284 | <para>For most delivery systems, <constant>dtv_property.stat.len</constant> | ||
| 1285 | will be 1 if the stats is supported, and the properties will | ||
| 1286 | return a single value for each parameter.</para> | ||
| 1287 | <para>It should be noted, however, that new OFDM delivery systems | ||
| 1288 | like ISDB can use different modulation types for each group of | ||
| 1289 | carriers. On such standards, up to 3 groups of statistics can be | ||
| 1290 | provided, and <constant>dtv_property.stat.len</constant> is updated | ||
| 1291 | to reflect the "global" metrics, plus one metric per each carrier | ||
| 1292 | group (called "layer" on ISDB).</para> | ||
| 1293 | <para>So, in order to be consistent with other delivery systems, the first | ||
| 1294 | value at <link linkend="dtv-stats"><constant>dtv_property.stat.dtv_stats</constant></link> | ||
| 1295 | array refers to the global metric. The other elements of the array | ||
| 1296 | represent each layer, starting from layer A(index 1), | ||
| 1297 | layer B (index 2) and so on.</para> | ||
| 1298 | <para>The number of filled elements are stored at <constant>dtv_property.stat.len</constant>.</para> | ||
| 1299 | <para>Each element of the <constant>dtv_property.stat.dtv_stats</constant> array consists on two elements:</para> | ||
| 1300 | <itemizedlist mark='opencircle'> | ||
| 1301 | <listitem><para><constant>svalue</constant> or <constant>uvalue</constant>, where | ||
| 1302 | <constant>svalue</constant> is for signed values of the measure (dB measures) | ||
| 1303 | and <constant>uvalue</constant> is for unsigned values (counters, relative scale)</para></listitem> | ||
| 1304 | <listitem><para><constant>scale</constant> - Scale for the value. It can be:</para> | ||
| 1305 | <itemizedlist mark='bullet' id="fecap-scale-params"> | ||
| 1306 | <listitem id="FE-SCALE-NOT-AVAILABLE"><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - The parameter is supported by the frontend, but it was not possible to collect it (could be a transitory or permanent condition)</para></listitem> | ||
| 1307 | <listitem id="FE-SCALE-DECIBEL"><para><constant>FE_SCALE_DECIBEL</constant> - parameter is a signed value, measured in 1/1000 dB</para></listitem> | ||
| 1308 | <listitem id="FE-SCALE-RELATIVE"><para><constant>FE_SCALE_RELATIVE</constant> - parameter is a unsigned value, where 0 means 0% and 65535 means 100%.</para></listitem> | ||
| 1309 | <listitem id="FE-SCALE-COUNTER"><para><constant>FE_SCALE_COUNTER</constant> - parameter is a unsigned value that counts the occurrence of an event, like bit error, block error, or lapsed time.</para></listitem> | ||
| 1310 | </itemizedlist> | ||
| 1311 | </listitem> | ||
| 1312 | </itemizedlist> | ||
| 1313 | <section id="DTV-STAT-SIGNAL-STRENGTH"> | ||
| 1314 | <title><constant>DTV_STAT_SIGNAL_STRENGTH</constant></title> | ||
| 1315 | <para>Indicates the signal strength level at the analog part of the tuner or of the demod.</para> | ||
| 1316 | <para>Possible scales for this metric are:</para> | ||
| 1317 | <itemizedlist mark='bullet'> | ||
| 1318 | <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> | ||
| 1319 | <listitem><para><constant>FE_SCALE_DECIBEL</constant> - signal strength is in 0.001 dBm units, power measured in miliwatts. This value is generally negative.</para></listitem> | ||
| 1320 | <listitem><para><constant>FE_SCALE_RELATIVE</constant> - The frontend provides a 0% to 100% measurement for power (actually, 0 to 65535).</para></listitem> | ||
| 1321 | </itemizedlist> | ||
| 1322 | </section> | ||
| 1323 | <section id="DTV-STAT-CNR"> | ||
| 1324 | <title><constant>DTV_STAT_CNR</constant></title> | ||
| 1325 | <para>Indicates the Signal to Noise ratio for the main carrier.</para> | ||
| 1326 | <para>Possible scales for this metric are:</para> | ||
| 1327 | <itemizedlist mark='bullet'> | ||
| 1328 | <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> | ||
| 1329 | <listitem><para><constant>FE_SCALE_DECIBEL</constant> - Signal/Noise ratio is in 0.001 dB units.</para></listitem> | ||
| 1330 | <listitem><para><constant>FE_SCALE_RELATIVE</constant> - The frontend provides a 0% to 100% measurement for Signal/Noise (actually, 0 to 65535).</para></listitem> | ||
| 1331 | </itemizedlist> | ||
| 1332 | </section> | ||
| 1333 | <section id="DTV-STAT-PRE-ERROR-BIT-COUNT"> | ||
| 1334 | <title><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></title> | ||
| 1335 | <para>Measures the number of bit errors before the forward error correction (FEC) on the inner coding block (before Viterbi, LDPC or other inner code).</para> | ||
| 1336 | <para>This measure is taken during the same interval as <constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant>.</para> | ||
| 1337 | <para>In order to get the BER (Bit Error Rate) measurement, it should be divided by | ||
| 1338 | <link linkend="DTV-STAT-PRE-TOTAL-BIT-COUNT"><constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant></link>.</para> | ||
| 1339 | <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. | ||
| 1340 | The frontend may reset it when a channel/transponder is tuned.</para> | ||
| 1341 | <para>Possible scales for this metric are:</para> | ||
| 1342 | <itemizedlist mark='bullet'> | ||
| 1343 | <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> | ||
| 1344 | <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error bits counted before the inner coding.</para></listitem> | ||
| 1345 | </itemizedlist> | ||
| 1346 | </section> | ||
| 1347 | <section id="DTV-STAT-PRE-TOTAL-BIT-COUNT"> | ||
| 1348 | <title><constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant></title> | ||
| 1349 | <para>Measures the amount of bits received before the inner code block, during the same period as | ||
| 1350 | <link linkend="DTV-STAT-PRE-ERROR-BIT-COUNT"><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></link> measurement was taken.</para> | ||
| 1351 | <para>It should be noted that this measurement can be smaller than the total amount of bits on the transport stream, | ||
| 1352 | as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</para> | ||
| 1353 | <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. | ||
| 1354 | The frontend may reset it when a channel/transponder is tuned.</para> | ||
| 1355 | <para>Possible scales for this metric are:</para> | ||
| 1356 | <itemizedlist mark='bullet'> | ||
| 1357 | <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> | ||
| 1358 | <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of bits counted while measuring | ||
| 1359 | <link linkend="DTV-STAT-PRE-ERROR-BIT-COUNT"><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></link>.</para></listitem> | ||
| 1360 | </itemizedlist> | ||
| 1361 | </section> | ||
| 1362 | <section id="DTV-STAT-POST-ERROR-BIT-COUNT"> | ||
| 1363 | <title><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></title> | ||
| 1364 | <para>Measures the number of bit errors after the forward error correction (FEC) done by inner code block (after Viterbi, LDPC or other inner code).</para> | ||
| 1365 | <para>This measure is taken during the same interval as <constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant>.</para> | ||
| 1366 | <para>In order to get the BER (Bit Error Rate) measurement, it should be divided by | ||
| 1367 | <link linkend="DTV-STAT-POST-TOTAL-BIT-COUNT"><constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant></link>.</para> | ||
| 1368 | <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. | ||
| 1369 | The frontend may reset it when a channel/transponder is tuned.</para> | ||
| 1370 | <para>Possible scales for this metric are:</para> | ||
| 1371 | <itemizedlist mark='bullet'> | ||
| 1372 | <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> | ||
| 1373 | <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error bits counted after the inner coding.</para></listitem> | ||
| 1374 | </itemizedlist> | ||
| 1375 | </section> | ||
| 1376 | <section id="DTV-STAT-POST-TOTAL-BIT-COUNT"> | ||
| 1377 | <title><constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant></title> | ||
| 1378 | <para>Measures the amount of bits received after the inner coding, during the same period as | ||
| 1379 | <link linkend="DTV-STAT-POST-ERROR-BIT-COUNT"><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></link> measurement was taken.</para> | ||
| 1380 | <para>It should be noted that this measurement can be smaller than the total amount of bits on the transport stream, | ||
| 1381 | as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</para> | ||
| 1382 | <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. | ||
| 1383 | The frontend may reset it when a channel/transponder is tuned.</para> | ||
| 1384 | <para>Possible scales for this metric are:</para> | ||
| 1385 | <itemizedlist mark='bullet'> | ||
| 1386 | <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> | ||
| 1387 | <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of bits counted while measuring | ||
| 1388 | <link linkend="DTV-STAT-POST-ERROR-BIT-COUNT"><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></link>.</para></listitem> | ||
| 1389 | </itemizedlist> | ||
| 1390 | </section> | ||
| 1391 | <section id="DTV-STAT-ERROR-BLOCK-COUNT"> | ||
| 1392 | <title><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></title> | ||
| 1393 | <para>Measures the number of block errors after the outer forward error correction coding (after Reed-Solomon or other outer code).</para> | ||
| 1394 | <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. | ||
| 1395 | The frontend may reset it when a channel/transponder is tuned.</para> | ||
| 1396 | <para>Possible scales for this metric are:</para> | ||
| 1397 | <itemizedlist mark='bullet'> | ||
| 1398 | <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> | ||
| 1399 | <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error blocks counted after the outer coding.</para></listitem> | ||
| 1400 | </itemizedlist> | ||
| 1401 | </section> | ||
| 1402 | <section id="DTV-STAT-TOTAL-BLOCK-COUNT"> | ||
| 1403 | <title><constant>DTV-STAT_TOTAL_BLOCK_COUNT</constant></title> | ||
| 1404 | <para>Measures the total number of blocks received during the same period as | ||
| 1405 | <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link> measurement was taken.</para> | ||
| 1406 | <para>It can be used to calculate the PER indicator, by dividing | ||
| 1407 | <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link> | ||
| 1408 | by <link linkend="DTV-STAT-TOTAL-BLOCK-COUNT"><constant>DTV-STAT-TOTAL-BLOCK-COUNT</constant></link>.</para> | ||
| 1409 | <para>Possible scales for this metric are:</para> | ||
| 1410 | <itemizedlist mark='bullet'> | ||
| 1411 | <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> | ||
| 1412 | <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of blocks counted while measuring | ||
| 1413 | <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link>.</para></listitem> | ||
| 1414 | </itemizedlist> | ||
| 1415 | </section> | ||
| 1416 | </section> | ||
| 1417 | |||
| 1418 | <section id="frontend-property-terrestrial-systems"> | ||
| 1419 | <title>Properties used on terrestrial delivery systems</title> | ||
| 1420 | <section id="dvbt-params"> | ||
| 1421 | <title>DVB-T delivery system</title> | ||
| 1422 | <para>The following parameters are valid for DVB-T:</para> | ||
| 1423 | <itemizedlist mark='opencircle'> | ||
| 1424 | <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> | ||
| 1425 | <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> | ||
| 1426 | <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> | ||
| 1427 | <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> | ||
| 1428 | <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> | ||
| 1429 | <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> | ||
| 1430 | <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> | ||
| 1431 | <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> | ||
| 1432 | <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem> | ||
| 1433 | <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem> | ||
| 1434 | <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> | ||
| 1435 | <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> | ||
| 1436 | <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem> | ||
| 1437 | <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> | ||
| 1438 | </itemizedlist> | ||
| 1439 | <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> | ||
| 1440 | </section> | ||
| 1441 | <section id="dvbt2-params"> | ||
| 1442 | <title>DVB-T2 delivery system</title> | ||
| 1443 | <para>DVB-T2 support is currently in the early stages | ||
| 1444 | of development, so expect that this section maygrow and become | ||
| 1445 | more detailed with time.</para> | ||
| 1446 | <para>The following parameters are valid for DVB-T2:</para> | ||
| 1447 | <itemizedlist mark='opencircle'> | ||
| 1448 | <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> | ||
| 1449 | <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> | ||
| 1450 | <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> | ||
| 1451 | <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> | ||
| 1452 | <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> | ||
| 1453 | <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> | ||
| 1454 | <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> | ||
| 1455 | <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> | ||
| 1456 | <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem> | ||
| 1457 | <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem> | ||
| 1458 | <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> | ||
| 1459 | <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> | ||
| 1460 | <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem> | ||
| 1461 | <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem> | ||
| 1462 | <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> | ||
| 1463 | </itemizedlist> | ||
| 1464 | <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> | ||
| 1465 | </section> | ||
| 1466 | <section id="isdbt"> | ||
| 1467 | <title>ISDB-T delivery system</title> | ||
| 1468 | <para>This ISDB-T/ISDB-Tsb API extension should reflect all information | ||
| 1469 | needed to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible | ||
| 1470 | that some very sophisticated devices won't need certain parameters to | ||
| 1471 | tune.</para> | ||
| 1472 | <para>The information given here should help application writers to know how | ||
| 1473 | to handle ISDB-T and ISDB-Tsb hardware using the Linux DVB-API.</para> | ||
| 1474 | <para>The details given here about ISDB-T and ISDB-Tsb are just enough to | ||
| 1475 | basically show the dependencies between the needed parameter values, | ||
| 1476 | but surely some information is left out. For more detailed information | ||
| 1477 | see the following documents:</para> | ||
| 1478 | <para>ARIB STD-B31 - "Transmission System for Digital Terrestrial | ||
| 1479 | Television Broadcasting" and</para> | ||
| 1480 | <para>ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial | ||
| 1481 | Television Broadcasting".</para> | ||
| 1482 | <para>In order to understand the ISDB specific parameters, | ||
| 1483 | one has to have some knowledge the channel structure in | ||
| 1484 | ISDB-T and ISDB-Tsb. I.e. it has to be known to | ||
| 1485 | the reader that an ISDB-T channel consists of 13 segments, | ||
| 1486 | that it can have up to 3 layer sharing those segments, | ||
| 1487 | and things like that.</para> | ||
| 1488 | <para>The following parameters are valid for ISDB-T:</para> | ||
| 1489 | <itemizedlist mark='opencircle'> | ||
| 1490 | <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> | ||
| 1491 | <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> | ||
| 1492 | <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> | ||
| 1493 | <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> | ||
| 1494 | <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> | ||
| 1495 | <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> | ||
| 1496 | <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> | ||
| 1497 | <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> | ||
| 1498 | <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> | ||
| 1499 | <listitem><para><link linkend="DTV-ISDBT-LAYER-ENABLED"><constant>DTV_ISDBT_LAYER_ENABLED</constant></link></para></listitem> | ||
| 1500 | <listitem><para><link linkend="DTV-ISDBT-PARTIAL-RECEPTION"><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></link></para></listitem> | ||
| 1501 | <listitem><para><link linkend="DTV-ISDBT-SOUND-BROADCASTING"><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></link></para></listitem> | ||
| 1502 | <listitem><para><link linkend="DTV-ISDBT-SB-SUBCHANNEL-ID"><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></link></para></listitem> | ||
| 1503 | <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-IDX"><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></link></para></listitem> | ||
| 1504 | <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-COUNT"><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></link></para></listitem> | ||
| 1505 | <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERA_FEC</constant></link></para></listitem> | ||
| 1506 | <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERA_MODULATION</constant></link></para></listitem> | ||
| 1507 | <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant></link></para></listitem> | ||
| 1508 | <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERA_TIME_INTERLEAVING</constant></link></para></listitem> | ||
| 1509 | <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERB_FEC</constant></link></para></listitem> | ||
| 1510 | <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERB_MODULATION</constant></link></para></listitem> | ||
| 1511 | <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERB_SEGMENT_COUNT</constant></link></para></listitem> | ||
| 1512 | <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERB_TIME_INTERLEAVING</constant></link></para></listitem> | ||
| 1513 | <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERC_FEC</constant></link></para></listitem> | ||
| 1514 | <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERC_MODULATION</constant></link></para></listitem> | ||
| 1515 | <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERC_SEGMENT_COUNT</constant></link></para></listitem> | ||
| 1516 | <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERC_TIME_INTERLEAVING</constant></link></para></listitem> | ||
| 1517 | </itemizedlist> | ||
| 1518 | <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> | ||
| 1519 | </section> | ||
| 1520 | <section id="atsc-params"> | ||
| 1521 | <title>ATSC delivery system</title> | ||
| 1522 | <para>The following parameters are valid for ATSC:</para> | ||
| 1523 | <itemizedlist mark='opencircle'> | ||
| 1524 | <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> | ||
| 1525 | <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> | ||
| 1526 | <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> | ||
| 1527 | <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> | ||
| 1528 | <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> | ||
| 1529 | <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> | ||
| 1530 | <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> | ||
| 1531 | </itemizedlist> | ||
| 1532 | <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> | ||
| 1533 | </section> | ||
| 1534 | <section id="atscmh-params"> | ||
| 1535 | <title>ATSC-MH delivery system</title> | ||
| 1536 | <para>The following parameters are valid for ATSC-MH:</para> | ||
| 1537 | <itemizedlist mark='opencircle'> | ||
| 1538 | <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> | ||
| 1539 | <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> | ||
| 1540 | <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> | ||
| 1541 | <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> | ||
| 1542 | <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> | ||
| 1543 | <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> | ||
| 1544 | <listitem><para><link linkend="DTV-ATSCMH-FIC-VER"><constant>DTV_ATSCMH_FIC_VER</constant></link></para></listitem> | ||
| 1545 | <listitem><para><link linkend="DTV-ATSCMH-PARADE-ID"><constant>DTV_ATSCMH_PARADE_ID</constant></link></para></listitem> | ||
| 1546 | <listitem><para><link linkend="DTV-ATSCMH-NOG"><constant>DTV_ATSCMH_NOG</constant></link></para></listitem> | ||
| 1547 | <listitem><para><link linkend="DTV-ATSCMH-TNOG"><constant>DTV_ATSCMH_TNOG</constant></link></para></listitem> | ||
| 1548 | <listitem><para><link linkend="DTV-ATSCMH-SGN"><constant>DTV_ATSCMH_SGN</constant></link></para></listitem> | ||
| 1549 | <listitem><para><link linkend="DTV-ATSCMH-PRC"><constant>DTV_ATSCMH_PRC</constant></link></para></listitem> | ||
| 1550 | <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-MODE"><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></link></para></listitem> | ||
| 1551 | <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-ENSEMBLE"><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></link></para></listitem> | ||
| 1552 | <listitem><para><link linkend="DTV-ATSCMH-RS-CODE-MODE-PRI"><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></link></para></listitem> | ||
| 1553 | <listitem><para><link linkend="DTV-ATSCMH-RS-CODE-MODE-SEC"><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></link></para></listitem> | ||
| 1554 | <listitem><para><link linkend="DTV-ATSCMH-SCCC-BLOCK-MODE"><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></link></para></listitem> | ||
| 1555 | <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-A"><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></link></para></listitem> | ||
| 1556 | <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-B"><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></link></para></listitem> | ||
| 1557 | <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-C"><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></link></para></listitem> | ||
| 1558 | <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-D"><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></link></para></listitem> | ||
| 1559 | </itemizedlist> | ||
| 1560 | <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> | ||
| 1561 | </section> | ||
| 1562 | <section id="dtmb-params"> | ||
| 1563 | <title>DTMB delivery system</title> | ||
| 1564 | <para>The following parameters are valid for DTMB:</para> | ||
| 1565 | <itemizedlist mark='opencircle'> | ||
| 1566 | <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> | ||
| 1567 | <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> | ||
| 1568 | <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> | ||
| 1569 | <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> | ||
| 1570 | <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> | ||
| 1571 | <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> | ||
| 1572 | <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> | ||
| 1573 | <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> | ||
| 1574 | <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> | ||
| 1575 | <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> | ||
| 1576 | <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> | ||
| 1577 | <listitem><para><link linkend="DTV-INTERLEAVING"><constant>DTV_INTERLEAVING</constant></link></para></listitem> | ||
| 1578 | <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> | ||
| 1579 | </itemizedlist> | ||
| 1580 | <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> | ||
| 1581 | </section> | ||
| 1582 | </section> | ||
| 1583 | <section id="frontend-property-cable-systems"> | ||
| 1584 | <title>Properties used on cable delivery systems</title> | ||
| 1585 | <section id="dvbc-params"> | ||
| 1586 | <title>DVB-C delivery system</title> | ||
| 1587 | <para>The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.</para> | ||
| 1588 | <para>The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It supports a subset of the Annex A modulation types, and a roll-off of 0.13, instead of 0.15</para> | ||
| 1589 | <para>The following parameters are valid for DVB-C Annex A/C:</para> | ||
| 1590 | <itemizedlist mark='opencircle'> | ||
| 1591 | <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> | ||
| 1592 | <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> | ||
| 1593 | <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> | ||
| 1594 | <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> | ||
| 1595 | <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> | ||
| 1596 | <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> | ||
| 1597 | <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> | ||
| 1598 | <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> | ||
| 1599 | <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> | ||
| 1600 | <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> | ||
| 1601 | </itemizedlist> | ||
| 1602 | <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> | ||
| 1603 | </section> | ||
| 1604 | <section id="dvbc-annex-b-params"> | ||
| 1605 | <title>DVB-C Annex B delivery system</title> | ||
| 1606 | <para>The DVB-C Annex-B is only used on a few Countries like the United States.</para> | ||
| 1607 | <para>The following parameters are valid for DVB-C Annex B:</para> | ||
| 1608 | <itemizedlist mark='opencircle'> | ||
| 1609 | <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> | ||
| 1610 | <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> | ||
| 1611 | <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> | ||
| 1612 | <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> | ||
| 1613 | <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> | ||
| 1614 | <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> | ||
| 1615 | <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> | ||
| 1616 | <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> | ||
| 1617 | </itemizedlist> | ||
| 1618 | <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> | ||
| 1619 | </section> | ||
| 1620 | </section> | ||
| 1621 | <section id="frontend-property-satellite-systems"> | ||
| 1622 | <title>Properties used on satellite delivery systems</title> | ||
| 1623 | <section id="dvbs-params"> | ||
| 1624 | <title>DVB-S delivery system</title> | ||
| 1625 | <para>The following parameters are valid for DVB-S:</para> | ||
| 1626 | <itemizedlist mark='opencircle'> | ||
| 1627 | <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> | ||
| 1628 | <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> | ||
| 1629 | <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> | ||
| 1630 | <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> | ||
| 1631 | <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> | ||
| 1632 | <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> | ||
| 1633 | <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> | ||
| 1634 | <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> | ||
| 1635 | <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem> | ||
| 1636 | <listitem><para><link linkend="DTV-TONE"><constant>DTV_TONE</constant></link></para></listitem> | ||
| 1637 | </itemizedlist> | ||
| 1638 | <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> | ||
| 1639 | <para>Future implementations might add those two missing parameters:</para> | ||
| 1640 | <itemizedlist mark='opencircle'> | ||
| 1641 | <listitem><para><link linkend="DTV-DISEQC-MASTER"><constant>DTV_DISEQC_MASTER</constant></link></para></listitem> | ||
| 1642 | <listitem><para><link linkend="DTV-DISEQC-SLAVE-REPLY"><constant>DTV_DISEQC_SLAVE_REPLY</constant></link></para></listitem> | ||
| 1643 | </itemizedlist> | ||
| 1644 | </section> | ||
| 1645 | <section id="dvbs2-params"> | ||
| 1646 | <title>DVB-S2 delivery system</title> | ||
| 1647 | <para>In addition to all parameters valid for DVB-S, DVB-S2 supports the following parameters:</para> | ||
| 1648 | <itemizedlist mark='opencircle'> | ||
| 1649 | <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> | ||
| 1650 | <listitem><para><link linkend="DTV-PILOT"><constant>DTV_PILOT</constant></link></para></listitem> | ||
| 1651 | <listitem><para><link linkend="DTV-ROLLOFF"><constant>DTV_ROLLOFF</constant></link></para></listitem> | ||
| 1652 | <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem> | ||
| 1653 | </itemizedlist> | ||
| 1654 | <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> | ||
| 1655 | </section> | ||
| 1656 | <section id="turbo-params"> | ||
| 1657 | <title>Turbo code delivery system</title> | ||
| 1658 | <para>In addition to all parameters valid for DVB-S, turbo code supports the following parameters:</para> | ||
| 1659 | <itemizedlist mark='opencircle'> | ||
| 1660 | <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> | ||
| 1661 | </itemizedlist> | ||
| 1662 | </section> | ||
| 1663 | <section id="isdbs-params"> | ||
| 1664 | <title>ISDB-S delivery system</title> | ||
| 1665 | <para>The following parameters are valid for ISDB-S:</para> | ||
| 1666 | <itemizedlist mark='opencircle'> | ||
| 1667 | <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> | ||
| 1668 | <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> | ||
| 1669 | <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> | ||
| 1670 | <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> | ||
| 1671 | <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> | ||
| 1672 | <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> | ||
| 1673 | <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> | ||
| 1674 | <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> | ||
| 1675 | <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem> | ||
| 1676 | <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem> | ||
| 1677 | </itemizedlist> | ||
| 1678 | </section> | ||
| 1679 | </section> | ||
| 1680 | </section> | ||
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| @@ -1,367 +0,0 @@ | |||
| 1 | <title>Examples</title> | ||
| 2 | <para>In this section we would like to present some examples for using the DVB API. | ||
| 3 | </para> | ||
| 4 | <para>NOTE: This section is out of date, and the code below won't even | ||
| 5 | compile. Please refer to the | ||
| 6 | <ulink url="https://linuxtv.org/docs/libdvbv5/index.html">libdvbv5</ulink> | ||
| 7 | for updated/recommended examples. | ||
| 8 | </para> | ||
| 9 | |||
| 10 | <section id="tuning"> | ||
| 11 | <title>Tuning</title> | ||
| 12 | <para>We will start with a generic tuning subroutine that uses the frontend and SEC, as well as | ||
| 13 | the demux devices. The example is given for QPSK tuners, but can easily be adjusted for | ||
| 14 | QAM. | ||
| 15 | </para> | ||
| 16 | <programlisting> | ||
| 17 | #include <sys/ioctl.h> | ||
| 18 | #include <stdio.h> | ||
| 19 | #include <stdint.h> | ||
| 20 | #include <sys/types.h> | ||
| 21 | #include <sys/stat.h> | ||
| 22 | #include <fcntl.h> | ||
| 23 | #include <time.h> | ||
| 24 | #include <unistd.h> | ||
| 25 | |||
| 26 | #include <linux/dvb/dmx.h> | ||
| 27 | #include <linux/dvb/frontend.h> | ||
| 28 | #include <linux/dvb/sec.h> | ||
| 29 | #include <sys/poll.h> | ||
| 30 | |||
| 31 | #define DMX "/dev/dvb/adapter0/demux1" | ||
| 32 | #define FRONT "/dev/dvb/adapter0/frontend1" | ||
| 33 | #define SEC "/dev/dvb/adapter0/sec1" | ||
| 34 | |||
| 35 | /⋆ routine for checking if we have a signal and other status information⋆/ | ||
| 36 | int FEReadStatus(int fd, fe_status_t ⋆stat) | ||
| 37 | { | ||
| 38 | int ans; | ||
| 39 | |||
| 40 | if ( (ans = ioctl(fd,FE_READ_STATUS,stat) < 0)){ | ||
| 41 | perror("FE READ STATUS: "); | ||
| 42 | return -1; | ||
| 43 | } | ||
| 44 | |||
| 45 | if (⋆stat & FE_HAS_POWER) | ||
| 46 | printf("FE HAS POWER\n"); | ||
| 47 | |||
| 48 | if (⋆stat & FE_HAS_SIGNAL) | ||
| 49 | printf("FE HAS SIGNAL\n"); | ||
| 50 | |||
| 51 | if (⋆stat & FE_SPECTRUM_INV) | ||
| 52 | printf("SPEKTRUM INV\n"); | ||
| 53 | |||
| 54 | return 0; | ||
| 55 | } | ||
| 56 | |||
| 57 | |||
| 58 | /⋆ tune qpsk ⋆/ | ||
| 59 | /⋆ freq: frequency of transponder ⋆/ | ||
| 60 | /⋆ vpid, apid, tpid: PIDs of video, audio and teletext TS packets ⋆/ | ||
| 61 | /⋆ diseqc: DiSEqC address of the used LNB ⋆/ | ||
| 62 | /⋆ pol: Polarisation ⋆/ | ||
| 63 | /⋆ srate: Symbol Rate ⋆/ | ||
| 64 | /⋆ fec. FEC ⋆/ | ||
| 65 | /⋆ lnb_lof1: local frequency of lower LNB band ⋆/ | ||
| 66 | /⋆ lnb_lof2: local frequency of upper LNB band ⋆/ | ||
| 67 | /⋆ lnb_slof: switch frequency of LNB ⋆/ | ||
| 68 | |||
| 69 | int set_qpsk_channel(int freq, int vpid, int apid, int tpid, | ||
| 70 | int diseqc, int pol, int srate, int fec, int lnb_lof1, | ||
| 71 | int lnb_lof2, int lnb_slof) | ||
| 72 | { | ||
| 73 | struct secCommand scmd; | ||
| 74 | struct secCmdSequence scmds; | ||
| 75 | struct dmx_pes_filter_params pesFilterParams; | ||
| 76 | FrontendParameters frp; | ||
| 77 | struct pollfd pfd[1]; | ||
| 78 | FrontendEvent event; | ||
| 79 | int demux1, demux2, demux3, front; | ||
| 80 | |||
| 81 | frequency = (uint32_t) freq; | ||
| 82 | symbolrate = (uint32_t) srate; | ||
| 83 | |||
| 84 | if((front = open(FRONT,O_RDWR)) < 0){ | ||
| 85 | perror("FRONTEND DEVICE: "); | ||
| 86 | return -1; | ||
| 87 | } | ||
| 88 | |||
| 89 | if((sec = open(SEC,O_RDWR)) < 0){ | ||
| 90 | perror("SEC DEVICE: "); | ||
| 91 | return -1; | ||
| 92 | } | ||
| 93 | |||
| 94 | if (demux1 < 0){ | ||
| 95 | if ((demux1=open(DMX, O_RDWR|O_NONBLOCK)) | ||
| 96 | < 0){ | ||
| 97 | perror("DEMUX DEVICE: "); | ||
| 98 | return -1; | ||
| 99 | } | ||
| 100 | } | ||
| 101 | |||
| 102 | if (demux2 < 0){ | ||
| 103 | if ((demux2=open(DMX, O_RDWR|O_NONBLOCK)) | ||
| 104 | < 0){ | ||
| 105 | perror("DEMUX DEVICE: "); | ||
| 106 | return -1; | ||
| 107 | } | ||
| 108 | } | ||
| 109 | |||
| 110 | if (demux3 < 0){ | ||
| 111 | if ((demux3=open(DMX, O_RDWR|O_NONBLOCK)) | ||
| 112 | < 0){ | ||
| 113 | perror("DEMUX DEVICE: "); | ||
| 114 | return -1; | ||
| 115 | } | ||
| 116 | } | ||
| 117 | |||
| 118 | if (freq < lnb_slof) { | ||
| 119 | frp.Frequency = (freq - lnb_lof1); | ||
| 120 | scmds.continuousTone = SEC_TONE_OFF; | ||
| 121 | } else { | ||
| 122 | frp.Frequency = (freq - lnb_lof2); | ||
| 123 | scmds.continuousTone = SEC_TONE_ON; | ||
| 124 | } | ||
| 125 | frp.Inversion = INVERSION_AUTO; | ||
| 126 | if (pol) scmds.voltage = SEC_VOLTAGE_18; | ||
| 127 | else scmds.voltage = SEC_VOLTAGE_13; | ||
| 128 | |||
| 129 | scmd.type=0; | ||
| 130 | scmd.u.diseqc.addr=0x10; | ||
| 131 | scmd.u.diseqc.cmd=0x38; | ||
| 132 | scmd.u.diseqc.numParams=1; | ||
| 133 | scmd.u.diseqc.params[0] = 0xF0 | ((diseqc ⋆ 4) & 0x0F) | | ||
| 134 | (scmds.continuousTone == SEC_TONE_ON ? 1 : 0) | | ||
| 135 | (scmds.voltage==SEC_VOLTAGE_18 ? 2 : 0); | ||
| 136 | |||
| 137 | scmds.miniCommand=SEC_MINI_NONE; | ||
| 138 | scmds.numCommands=1; | ||
| 139 | scmds.commands=&scmd; | ||
| 140 | if (ioctl(sec, SEC_SEND_SEQUENCE, &scmds) < 0){ | ||
| 141 | perror("SEC SEND: "); | ||
| 142 | return -1; | ||
| 143 | } | ||
| 144 | |||
| 145 | if (ioctl(sec, SEC_SEND_SEQUENCE, &scmds) < 0){ | ||
| 146 | perror("SEC SEND: "); | ||
| 147 | return -1; | ||
| 148 | } | ||
| 149 | |||
| 150 | frp.u.qpsk.SymbolRate = srate; | ||
| 151 | frp.u.qpsk.FEC_inner = fec; | ||
| 152 | |||
| 153 | if (ioctl(front, FE_SET_FRONTEND, &frp) < 0){ | ||
| 154 | perror("QPSK TUNE: "); | ||
| 155 | return -1; | ||
| 156 | } | ||
| 157 | |||
| 158 | pfd[0].fd = front; | ||
| 159 | pfd[0].events = POLLIN; | ||
| 160 | |||
| 161 | if (poll(pfd,1,3000)){ | ||
| 162 | if (pfd[0].revents & POLLIN){ | ||
| 163 | printf("Getting QPSK event\n"); | ||
| 164 | if ( ioctl(front, FE_GET_EVENT, &event) | ||
| 165 | |||
| 166 | == -EOVERFLOW){ | ||
| 167 | perror("qpsk get event"); | ||
| 168 | return -1; | ||
| 169 | } | ||
| 170 | printf("Received "); | ||
| 171 | switch(event.type){ | ||
| 172 | case FE_UNEXPECTED_EV: | ||
| 173 | printf("unexpected event\n"); | ||
| 174 | return -1; | ||
| 175 | case FE_FAILURE_EV: | ||
| 176 | printf("failure event\n"); | ||
| 177 | return -1; | ||
| 178 | |||
| 179 | case FE_COMPLETION_EV: | ||
| 180 | printf("completion event\n"); | ||
| 181 | } | ||
| 182 | } | ||
| 183 | } | ||
| 184 | |||
| 185 | |||
| 186 | pesFilterParams.pid = vpid; | ||
| 187 | pesFilterParams.input = DMX_IN_FRONTEND; | ||
| 188 | pesFilterParams.output = DMX_OUT_DECODER; | ||
| 189 | pesFilterParams.pes_type = DMX_PES_VIDEO; | ||
| 190 | pesFilterParams.flags = DMX_IMMEDIATE_START; | ||
| 191 | if (ioctl(demux1, DMX_SET_PES_FILTER, &pesFilterParams) < 0){ | ||
| 192 | perror("set_vpid"); | ||
| 193 | return -1; | ||
| 194 | } | ||
| 195 | |||
| 196 | pesFilterParams.pid = apid; | ||
| 197 | pesFilterParams.input = DMX_IN_FRONTEND; | ||
| 198 | pesFilterParams.output = DMX_OUT_DECODER; | ||
| 199 | pesFilterParams.pes_type = DMX_PES_AUDIO; | ||
| 200 | pesFilterParams.flags = DMX_IMMEDIATE_START; | ||
| 201 | if (ioctl(demux2, DMX_SET_PES_FILTER, &pesFilterParams) < 0){ | ||
| 202 | perror("set_apid"); | ||
| 203 | return -1; | ||
| 204 | } | ||
| 205 | |||
| 206 | pesFilterParams.pid = tpid; | ||
| 207 | pesFilterParams.input = DMX_IN_FRONTEND; | ||
| 208 | pesFilterParams.output = DMX_OUT_DECODER; | ||
| 209 | pesFilterParams.pes_type = DMX_PES_TELETEXT; | ||
| 210 | pesFilterParams.flags = DMX_IMMEDIATE_START; | ||
| 211 | if (ioctl(demux3, DMX_SET_PES_FILTER, &pesFilterParams) < 0){ | ||
| 212 | perror("set_tpid"); | ||
| 213 | return -1; | ||
| 214 | } | ||
| 215 | |||
| 216 | return has_signal(fds); | ||
| 217 | } | ||
| 218 | |||
| 219 | </programlisting> | ||
| 220 | <para>The program assumes that you are using a universal LNB and a standard DiSEqC | ||
| 221 | switch with up to 4 addresses. Of course, you could build in some more checking if | ||
| 222 | tuning was successful and maybe try to repeat the tuning process. Depending on the | ||
| 223 | external hardware, i.e. LNB and DiSEqC switch, and weather conditions this may be | ||
| 224 | necessary. | ||
| 225 | </para> | ||
| 226 | </section> | ||
| 227 | |||
| 228 | <section id="the_dvr_device"> | ||
| 229 | <title>The DVR device</title> | ||
| 230 | <para>The following program code shows how to use the DVR device for recording. | ||
| 231 | </para> | ||
| 232 | <programlisting> | ||
| 233 | #include <sys/ioctl.h> | ||
| 234 | #include <stdio.h> | ||
| 235 | #include <stdint.h> | ||
| 236 | #include <sys/types.h> | ||
| 237 | #include <sys/stat.h> | ||
| 238 | #include <fcntl.h> | ||
| 239 | #include <time.h> | ||
| 240 | #include <unistd.h> | ||
| 241 | |||
| 242 | #include <linux/dvb/dmx.h> | ||
| 243 | #include <linux/dvb/video.h> | ||
| 244 | #include <sys/poll.h> | ||
| 245 | #define DVR "/dev/dvb/adapter0/dvr1" | ||
| 246 | #define AUDIO "/dev/dvb/adapter0/audio1" | ||
| 247 | #define VIDEO "/dev/dvb/adapter0/video1" | ||
| 248 | |||
| 249 | #define BUFFY (188⋆20) | ||
| 250 | #define MAX_LENGTH (1024⋆1024⋆5) /⋆ record 5MB ⋆/ | ||
| 251 | |||
| 252 | |||
| 253 | /⋆ switch the demuxes to recording, assuming the transponder is tuned ⋆/ | ||
| 254 | |||
| 255 | /⋆ demux1, demux2: file descriptor of video and audio filters ⋆/ | ||
| 256 | /⋆ vpid, apid: PIDs of video and audio channels ⋆/ | ||
| 257 | |||
| 258 | int switch_to_record(int demux1, int demux2, uint16_t vpid, uint16_t apid) | ||
| 259 | { | ||
| 260 | struct dmx_pes_filter_params pesFilterParams; | ||
| 261 | |||
| 262 | if (demux1 < 0){ | ||
| 263 | if ((demux1=open(DMX, O_RDWR|O_NONBLOCK)) | ||
| 264 | < 0){ | ||
| 265 | perror("DEMUX DEVICE: "); | ||
| 266 | return -1; | ||
| 267 | } | ||
| 268 | } | ||
| 269 | |||
| 270 | if (demux2 < 0){ | ||
| 271 | if ((demux2=open(DMX, O_RDWR|O_NONBLOCK)) | ||
| 272 | < 0){ | ||
| 273 | perror("DEMUX DEVICE: "); | ||
| 274 | return -1; | ||
| 275 | } | ||
| 276 | } | ||
| 277 | |||
| 278 | pesFilterParams.pid = vpid; | ||
| 279 | pesFilterParams.input = DMX_IN_FRONTEND; | ||
| 280 | pesFilterParams.output = DMX_OUT_TS_TAP; | ||
| 281 | pesFilterParams.pes_type = DMX_PES_VIDEO; | ||
| 282 | pesFilterParams.flags = DMX_IMMEDIATE_START; | ||
| 283 | if (ioctl(demux1, DMX_SET_PES_FILTER, &pesFilterParams) < 0){ | ||
| 284 | perror("DEMUX DEVICE"); | ||
| 285 | return -1; | ||
| 286 | } | ||
| 287 | pesFilterParams.pid = apid; | ||
| 288 | pesFilterParams.input = DMX_IN_FRONTEND; | ||
| 289 | pesFilterParams.output = DMX_OUT_TS_TAP; | ||
| 290 | pesFilterParams.pes_type = DMX_PES_AUDIO; | ||
| 291 | pesFilterParams.flags = DMX_IMMEDIATE_START; | ||
| 292 | if (ioctl(demux2, DMX_SET_PES_FILTER, &pesFilterParams) < 0){ | ||
| 293 | perror("DEMUX DEVICE"); | ||
| 294 | return -1; | ||
| 295 | } | ||
| 296 | return 0; | ||
| 297 | } | ||
| 298 | |||
| 299 | /⋆ start recording MAX_LENGTH , assuming the transponder is tuned ⋆/ | ||
| 300 | |||
| 301 | /⋆ demux1, demux2: file descriptor of video and audio filters ⋆/ | ||
| 302 | /⋆ vpid, apid: PIDs of video and audio channels ⋆/ | ||
| 303 | int record_dvr(int demux1, int demux2, uint16_t vpid, uint16_t apid) | ||
| 304 | { | ||
| 305 | int i; | ||
| 306 | int len; | ||
| 307 | int written; | ||
| 308 | uint8_t buf[BUFFY]; | ||
| 309 | uint64_t length; | ||
| 310 | struct pollfd pfd[1]; | ||
| 311 | int dvr, dvr_out; | ||
| 312 | |||
| 313 | /⋆ open dvr device ⋆/ | ||
| 314 | if ((dvr = open(DVR, O_RDONLY|O_NONBLOCK)) < 0){ | ||
| 315 | perror("DVR DEVICE"); | ||
| 316 | return -1; | ||
| 317 | } | ||
| 318 | |||
| 319 | /⋆ switch video and audio demuxes to dvr ⋆/ | ||
| 320 | printf ("Switching dvr on\n"); | ||
| 321 | i = switch_to_record(demux1, demux2, vpid, apid); | ||
| 322 | printf("finished: "); | ||
| 323 | |||
| 324 | printf("Recording %2.0f MB of test file in TS format\n", | ||
| 325 | MAX_LENGTH/(1024.0⋆1024.0)); | ||
| 326 | length = 0; | ||
| 327 | |||
| 328 | /⋆ open output file ⋆/ | ||
| 329 | if ((dvr_out = open(DVR_FILE,O_WRONLY|O_CREAT | ||
| 330 | |O_TRUNC, S_IRUSR|S_IWUSR | ||
| 331 | |S_IRGRP|S_IWGRP|S_IROTH| | ||
| 332 | S_IWOTH)) < 0){ | ||
| 333 | perror("Can't open file for dvr test"); | ||
| 334 | return -1; | ||
| 335 | } | ||
| 336 | |||
| 337 | pfd[0].fd = dvr; | ||
| 338 | pfd[0].events = POLLIN; | ||
| 339 | |||
| 340 | /⋆ poll for dvr data and write to file ⋆/ | ||
| 341 | while (length < MAX_LENGTH ) { | ||
| 342 | if (poll(pfd,1,1)){ | ||
| 343 | if (pfd[0].revents & POLLIN){ | ||
| 344 | len = read(dvr, buf, BUFFY); | ||
| 345 | if (len < 0){ | ||
| 346 | perror("recording"); | ||
| 347 | return -1; | ||
| 348 | } | ||
| 349 | if (len > 0){ | ||
| 350 | written = 0; | ||
| 351 | while (written < len) | ||
| 352 | written += | ||
| 353 | write (dvr_out, | ||
| 354 | buf, len); | ||
| 355 | length += len; | ||
| 356 | printf("written %2.0f MB\r", | ||
| 357 | length/1024./1024.); | ||
| 358 | } | ||
| 359 | } | ||
| 360 | } | ||
| 361 | } | ||
| 362 | return 0; | ||
| 363 | } | ||
| 364 | |||
| 365 | </programlisting> | ||
| 366 | |||
| 367 | </section> | ||
| @@ -1,78 +0,0 @@ | |||
| 1 | <refentry id="FE_DISEQC_RECV_SLAVE_REPLY"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_DISEQC_RECV_SLAVE_REPLY</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_DISEQC_RECV_SLAVE_REPLY</refname> | ||
| 9 | <refpurpose>Receives reply from a DiSEqC 2.0 command</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcprototype> | ||
| 15 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 16 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 17 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 18 | <paramdef>struct dvb_diseqc_slave_reply *<parameter>argp</parameter></paramdef> | ||
| 19 | </funcprototype> | ||
| 20 | </funcsynopsis> | ||
| 21 | </refsynopsisdiv> | ||
| 22 | |||
| 23 | <refsect1> | ||
| 24 | <title>Arguments</title> | ||
| 25 | <variablelist> | ||
| 26 | <varlistentry> | ||
| 27 | <term><parameter>fd</parameter></term> | ||
| 28 | <listitem> | ||
| 29 | <para>&fe_fd;</para> | ||
| 30 | </listitem> | ||
| 31 | </varlistentry> | ||
| 32 | <varlistentry> | ||
| 33 | <term><parameter>request</parameter></term> | ||
| 34 | <listitem> | ||
| 35 | <para>FE_DISEQC_RECV_SLAVE_REPLY</para> | ||
| 36 | </listitem> | ||
| 37 | </varlistentry> | ||
| 38 | <varlistentry> | ||
| 39 | <term><parameter>argp</parameter></term> | ||
| 40 | <listitem> | ||
| 41 | <para>pointer to &dvb-diseqc-slave-reply;</para> | ||
| 42 | </listitem> | ||
| 43 | </varlistentry> | ||
| 44 | </variablelist> | ||
| 45 | </refsect1> | ||
| 46 | |||
| 47 | <refsect1> | ||
| 48 | <title>Description</title> | ||
| 49 | |||
| 50 | <para>Receives reply from a DiSEqC 2.0 command.</para> | ||
| 51 | &return-value-dvb; | ||
| 52 | |||
| 53 | <table pgwide="1" frame="none" id="dvb-diseqc-slave-reply"> | ||
| 54 | <title>struct <structname>dvb_diseqc_slave_reply</structname></title> | ||
| 55 | <tgroup cols="3"> | ||
| 56 | &cs-str; | ||
| 57 | <tbody valign="top"> | ||
| 58 | <row> | ||
| 59 | <entry>uint8_t</entry> | ||
| 60 | <entry>msg[4]</entry> | ||
| 61 | <entry>DiSEqC message (framing, data[3])</entry> | ||
| 62 | </row><row> | ||
| 63 | <entry>uint8_t</entry> | ||
| 64 | <entry>msg_len</entry> | ||
| 65 | <entry>Length of the DiSEqC message. Valid values are 0 to 4, | ||
| 66 | where 0 means no msg</entry> | ||
| 67 | </row><row> | ||
| 68 | <entry>int</entry> | ||
| 69 | <entry>timeout</entry> | ||
| 70 | <entry>Return from ioctl after timeout ms with errorcode when no | ||
| 71 | message was received</entry> | ||
| 72 | </row> | ||
| 73 | </tbody> | ||
| 74 | </tgroup> | ||
| 75 | </table> | ||
| 76 | |||
| 77 | </refsect1> | ||
| 78 | </refentry> | ||
| @@ -1,51 +0,0 @@ | |||
| 1 | <refentry id="FE_DISEQC_RESET_OVERLOAD"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_DISEQC_RESET_OVERLOAD</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_DISEQC_RESET_OVERLOAD</refname> | ||
| 9 | <refpurpose>Restores the power to the antenna subsystem, if it was powered | ||
| 10 | off due to power overload.</refpurpose> | ||
| 11 | </refnamediv> | ||
| 12 | |||
| 13 | <refsynopsisdiv> | ||
| 14 | <funcsynopsis> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 18 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 19 | <paramdef>NULL</paramdef> | ||
| 20 | </funcprototype> | ||
| 21 | </funcsynopsis> | ||
| 22 | </refsynopsisdiv> | ||
| 23 | |||
| 24 | <refsect1> | ||
| 25 | <title>Arguments</title> | ||
| 26 | <variablelist> | ||
| 27 | <varlistentry> | ||
| 28 | <term><parameter>fd</parameter></term> | ||
| 29 | <listitem> | ||
| 30 | <para>&fe_fd;</para> | ||
| 31 | </listitem> | ||
| 32 | </varlistentry> | ||
| 33 | <varlistentry> | ||
| 34 | <term><parameter>request</parameter></term> | ||
| 35 | <listitem> | ||
| 36 | <para>FE_DISEQC_RESET_OVERLOAD</para> | ||
| 37 | </listitem> | ||
| 38 | </varlistentry> | ||
| 39 | </variablelist> | ||
| 40 | </refsect1> | ||
| 41 | |||
| 42 | <refsect1> | ||
| 43 | <title>Description</title> | ||
| 44 | |||
| 45 | <para>If the bus has been automatically powered off due to power overload, this ioctl | ||
| 46 | call restores the power to the bus. The call requires read/write access to the | ||
| 47 | device. This call has no effect if the device is manually powered off. Not all | ||
| 48 | DVB adapters support this ioctl.</para> | ||
| 49 | &return-value-dvb; | ||
| 50 | </refsect1> | ||
| 51 | </refentry> | ||
| @@ -1,89 +0,0 @@ | |||
| 1 | <refentry id="FE_DISEQC_SEND_BURST"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_DISEQC_SEND_BURST</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_DISEQC_SEND_BURST</refname> | ||
| 9 | <refpurpose>Sends a 22KHz tone burst for 2x1 mini DiSEqC satellite selection.</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcprototype> | ||
| 15 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 16 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 17 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 18 | <paramdef>enum fe_sec_mini_cmd *<parameter>tone</parameter></paramdef> | ||
| 19 | </funcprototype> | ||
| 20 | </funcsynopsis> | ||
| 21 | </refsynopsisdiv> | ||
| 22 | |||
| 23 | <refsect1> | ||
| 24 | <title>Arguments</title> | ||
| 25 | <variablelist> | ||
| 26 | <varlistentry> | ||
| 27 | <term><parameter>fd</parameter></term> | ||
| 28 | <listitem> | ||
| 29 | <para>&fe_fd;</para> | ||
| 30 | </listitem> | ||
| 31 | </varlistentry> | ||
| 32 | <varlistentry> | ||
| 33 | <term><parameter>request</parameter></term> | ||
| 34 | <listitem> | ||
| 35 | <para>FE_DISEQC_SEND_BURST</para> | ||
| 36 | </listitem> | ||
| 37 | </varlistentry> | ||
| 38 | <varlistentry> | ||
| 39 | <term><parameter>tone</parameter></term> | ||
| 40 | <listitem> | ||
| 41 | <para>pointer to &fe-sec-mini-cmd;</para> | ||
| 42 | </listitem> | ||
| 43 | </varlistentry> | ||
| 44 | </variablelist> | ||
| 45 | </refsect1> | ||
| 46 | |||
| 47 | <refsect1> | ||
| 48 | <title>Description</title> | ||
| 49 | |||
| 50 | <para>This ioctl is used to set the generation of a 22kHz tone burst for mini | ||
| 51 | DiSEqC satellite | ||
| 52 | selection for 2x1 switches. | ||
| 53 | This call requires read/write permissions.</para> | ||
| 54 | <para>It provides support for what's specified at | ||
| 55 | <ulink url="http://www.eutelsat.com/files/contributed/satellites/pdf/Diseqc/associated%20docs/simple_tone_burst_detec.pdf">Digital Satellite Equipment Control | ||
| 56 | (DiSEqC) - Simple "ToneBurst" Detection Circuit specification.</ulink> | ||
| 57 | </para> | ||
| 58 | &return-value-dvb; | ||
| 59 | </refsect1> | ||
| 60 | |||
| 61 | <refsect1 id="fe-sec-mini-cmd-t"> | ||
| 62 | <title>enum fe_sec_mini_cmd</title> | ||
| 63 | |||
| 64 | <table pgwide="1" frame="none" id="fe-sec-mini-cmd"> | ||
| 65 | <title>enum fe_sec_mini_cmd</title> | ||
| 66 | <tgroup cols="2"> | ||
| 67 | &cs-def; | ||
| 68 | <thead> | ||
| 69 | <row> | ||
| 70 | <entry>ID</entry> | ||
| 71 | <entry>Description</entry> | ||
| 72 | </row> | ||
| 73 | </thead> | ||
| 74 | <tbody valign="top"> | ||
| 75 | <row> | ||
| 76 | <entry align="char" id="SEC-MINI-A"><constant>SEC_MINI_A</constant></entry> | ||
| 77 | <entry align="char">Sends a mini-DiSEqC 22kHz '0' Tone Burst to | ||
| 78 | select satellite-A</entry> | ||
| 79 | </row><row> | ||
| 80 | <entry align="char" id="SEC-MINI-B"><constant>SEC_MINI_B</constant></entry> | ||
| 81 | <entry align="char">Sends a mini-DiSEqC 22kHz '1' Data Burst to | ||
| 82 | select satellite-B</entry> | ||
| 83 | </row> | ||
| 84 | </tbody> | ||
| 85 | </tgroup> | ||
| 86 | </table> | ||
| 87 | </refsect1> | ||
| 88 | |||
| 89 | </refentry> | ||
| @@ -1,72 +0,0 @@ | |||
| 1 | <refentry id="FE_DISEQC_SEND_MASTER_CMD"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_DISEQC_SEND_MASTER_CMD</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_DISEQC_SEND_MASTER_CMD</refname> | ||
| 9 | <refpurpose>Sends a DiSEqC command</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcprototype> | ||
| 15 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 16 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 17 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 18 | <paramdef>struct dvb_diseqc_master_cmd *<parameter>argp</parameter></paramdef> | ||
| 19 | </funcprototype> | ||
| 20 | </funcsynopsis> | ||
| 21 | </refsynopsisdiv> | ||
| 22 | |||
| 23 | <refsect1> | ||
| 24 | <title>Arguments</title> | ||
| 25 | <variablelist> | ||
| 26 | <varlistentry> | ||
| 27 | <term><parameter>fd</parameter></term> | ||
| 28 | <listitem> | ||
| 29 | <para>&fe_fd;</para> | ||
| 30 | </listitem> | ||
| 31 | </varlistentry> | ||
| 32 | <varlistentry> | ||
| 33 | <term><parameter>request</parameter></term> | ||
| 34 | <listitem> | ||
| 35 | <para>FE_DISEQC_SEND_MASTER_CMD</para> | ||
| 36 | </listitem> | ||
| 37 | </varlistentry> | ||
| 38 | <varlistentry> | ||
| 39 | <term><parameter>argp</parameter></term> | ||
| 40 | <listitem> | ||
| 41 | <para>pointer to &dvb-diseqc-master-cmd;</para> | ||
| 42 | </listitem> | ||
| 43 | </varlistentry> | ||
| 44 | </variablelist> | ||
| 45 | </refsect1> | ||
| 46 | |||
| 47 | <refsect1> | ||
| 48 | <title>Description</title> | ||
| 49 | |||
| 50 | <para>Sends a DiSEqC command to the antenna subsystem.</para> | ||
| 51 | &return-value-dvb; | ||
| 52 | |||
| 53 | <table pgwide="1" frame="none" id="dvb-diseqc-master-cmd"> | ||
| 54 | <title>struct <structname>dvb_diseqc_master_cmd</structname></title> | ||
| 55 | <tgroup cols="3"> | ||
| 56 | &cs-str; | ||
| 57 | <tbody valign="top"> | ||
| 58 | <row> | ||
| 59 | <entry>uint8_t</entry> | ||
| 60 | <entry>msg[6]</entry> | ||
| 61 | <entry>DiSEqC message (framing, address, command, data[3])</entry> | ||
| 62 | </row><row> | ||
| 63 | <entry>uint8_t</entry> | ||
| 64 | <entry>msg_len</entry> | ||
| 65 | <entry>Length of the DiSEqC message. Valid values are 3 to 6</entry> | ||
| 66 | </row> | ||
| 67 | </tbody> | ||
| 68 | </tgroup> | ||
| 69 | </table> | ||
| 70 | |||
| 71 | </refsect1> | ||
| 72 | </refentry> | ||
| @@ -1,61 +0,0 @@ | |||
| 1 | <refentry id="FE_ENABLE_HIGH_LNB_VOLTAGE"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_ENABLE_HIGH_LNB_VOLTAGE</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_ENABLE_HIGH_LNB_VOLTAGE</refname> | ||
| 9 | <refpurpose>Select output DC level between normal LNBf voltages or higher | ||
| 10 | LNBf voltages.</refpurpose> | ||
| 11 | </refnamediv> | ||
| 12 | |||
| 13 | <refsynopsisdiv> | ||
| 14 | <funcsynopsis> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 18 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 19 | <paramdef>unsigned int <parameter>high</parameter></paramdef> | ||
| 20 | </funcprototype> | ||
| 21 | </funcsynopsis> | ||
| 22 | </refsynopsisdiv> | ||
| 23 | |||
| 24 | <refsect1> | ||
| 25 | <title>Arguments</title> | ||
| 26 | <variablelist> | ||
| 27 | <varlistentry> | ||
| 28 | <term><parameter>fd</parameter></term> | ||
| 29 | <listitem> | ||
| 30 | <para>&fe_fd;</para> | ||
| 31 | </listitem> | ||
| 32 | </varlistentry> | ||
| 33 | <varlistentry> | ||
| 34 | <term><parameter>request</parameter></term> | ||
| 35 | <listitem> | ||
| 36 | <para>FE_ENABLE_HIGH_LNB_VOLTAGE</para> | ||
| 37 | </listitem> | ||
| 38 | </varlistentry> | ||
| 39 | <varlistentry> | ||
| 40 | <term><parameter>high</parameter></term> | ||
| 41 | <listitem> | ||
| 42 | <para>Valid flags:</para> | ||
| 43 | <itemizedlist> | ||
| 44 | <listitem><para>0 - normal 13V and 18V.</para></listitem> | ||
| 45 | <listitem><para>>0 - enables slightly higher voltages instead of | ||
| 46 | 13/18V, in order to compensate for long antenna cables.</para></listitem> | ||
| 47 | </itemizedlist> | ||
| 48 | </listitem> | ||
| 49 | </varlistentry> | ||
| 50 | </variablelist> | ||
| 51 | </refsect1> | ||
| 52 | |||
| 53 | <refsect1> | ||
| 54 | <title>Description</title> | ||
| 55 | |||
| 56 | <para>Select output DC level between normal LNBf voltages or higher | ||
| 57 | LNBf voltages between 0 (normal) or a value grater than 0 for higher | ||
| 58 | voltages.</para> | ||
| 59 | &return-value-dvb; | ||
| 60 | </refsect1> | ||
| 61 | </refentry> | ||
| @@ -1,266 +0,0 @@ | |||
| 1 | <refentry id="FE_GET_INFO"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_GET_INFO</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_GET_INFO</refname> | ||
| 9 | <refpurpose>Query DVB frontend capabilities and returns information about | ||
| 10 | the front-end. This call only requires read-only access to the device</refpurpose> | ||
| 11 | </refnamediv> | ||
| 12 | |||
| 13 | <refsynopsisdiv> | ||
| 14 | <funcsynopsis> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 18 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 19 | <paramdef>struct dvb_frontend_info *<parameter>argp</parameter></paramdef> | ||
| 20 | </funcprototype> | ||
| 21 | </funcsynopsis> | ||
| 22 | </refsynopsisdiv> | ||
| 23 | |||
| 24 | <refsect1> | ||
| 25 | <title>Arguments</title> | ||
| 26 | <variablelist> | ||
| 27 | <varlistentry> | ||
| 28 | <term><parameter>fd</parameter></term> | ||
| 29 | <listitem> | ||
| 30 | <para>&fe_fd;</para> | ||
| 31 | </listitem> | ||
| 32 | </varlistentry> | ||
| 33 | <varlistentry> | ||
| 34 | <term><parameter>request</parameter></term> | ||
| 35 | <listitem> | ||
| 36 | <para>FE_GET_INFO</para> | ||
| 37 | </listitem> | ||
| 38 | </varlistentry> | ||
| 39 | <varlistentry> | ||
| 40 | <term><parameter>argp</parameter></term> | ||
| 41 | <listitem> | ||
| 42 | <para>pointer to struct &dvb-frontend-info;</para> | ||
| 43 | </listitem> | ||
| 44 | </varlistentry> | ||
| 45 | </variablelist> | ||
| 46 | </refsect1> | ||
| 47 | |||
| 48 | <refsect1> | ||
| 49 | <title>Description</title> | ||
| 50 | |||
| 51 | <para>All DVB frontend devices support the | ||
| 52 | <constant>FE_GET_INFO</constant> ioctl. It is used to identify | ||
| 53 | kernel devices compatible with this specification and to obtain | ||
| 54 | information about driver and hardware capabilities. The ioctl takes a | ||
| 55 | pointer to dvb_frontend_info which is filled by the driver. When the | ||
| 56 | driver is not compatible with this specification the ioctl returns an error. | ||
| 57 | </para> | ||
| 58 | &return-value-dvb; | ||
| 59 | |||
| 60 | <table pgwide="1" frame="none" id="dvb-frontend-info"> | ||
| 61 | <title>struct <structname>dvb_frontend_info</structname></title> | ||
| 62 | <tgroup cols="3"> | ||
| 63 | &cs-str; | ||
| 64 | <tbody valign="top"> | ||
| 65 | <row> | ||
| 66 | <entry>char</entry> | ||
| 67 | <entry>name[128]</entry> | ||
| 68 | <entry>Name of the frontend</entry> | ||
| 69 | </row><row> | ||
| 70 | <entry>fe_type_t</entry> | ||
| 71 | <entry>type</entry> | ||
| 72 | <entry><emphasis role="bold">DEPRECATED</emphasis>. DVBv3 type. Should not be used on modern programs, as a | ||
| 73 | frontend may have more than one type. So, the DVBv5 API should | ||
| 74 | be used instead to enumerate and select the frontend type.</entry> | ||
| 75 | </row><row> | ||
| 76 | <entry>uint32_t</entry> | ||
| 77 | <entry>frequency_min</entry> | ||
| 78 | <entry>Minimal frequency supported by the frontend</entry> | ||
| 79 | </row><row> | ||
| 80 | <entry>uint32_t</entry> | ||
| 81 | <entry>frequency_max</entry> | ||
| 82 | <entry>Maximal frequency supported by the frontend</entry> | ||
| 83 | </row><row> | ||
| 84 | <entry>uint32_t</entry> | ||
| 85 | <entry>frequency_stepsize</entry> | ||
| 86 | <entry>Frequency step - all frequencies are multiple of this value</entry> | ||
| 87 | </row><row> | ||
| 88 | <entry>uint32_t</entry> | ||
| 89 | <entry>frequency_tolerance</entry> | ||
| 90 | <entry>Tolerance of the frequency</entry> | ||
| 91 | </row><row> | ||
| 92 | <entry>uint32_t</entry> | ||
| 93 | <entry>symbol_rate_min</entry> | ||
| 94 | <entry>Minimal symbol rate (for Cable/Satellite systems), in bauds</entry> | ||
| 95 | </row><row> | ||
| 96 | <entry>uint32_t</entry> | ||
| 97 | <entry>symbol_rate_max</entry> | ||
| 98 | <entry>Maximal symbol rate (for Cable/Satellite systems), in bauds</entry> | ||
| 99 | </row><row> | ||
| 100 | <entry>uint32_t</entry> | ||
| 101 | <entry>symbol_rate_tolerance</entry> | ||
| 102 | <entry>Maximal symbol rate tolerance, in ppm</entry> | ||
| 103 | </row><row> | ||
| 104 | <entry>uint32_t</entry> | ||
| 105 | <entry>notifier_delay</entry> | ||
| 106 | <entry><emphasis role="bold">DEPRECATED</emphasis>. Not used by any driver.</entry> | ||
| 107 | </row><row> | ||
| 108 | <entry>&fe-caps;</entry> | ||
| 109 | <entry>caps</entry> | ||
| 110 | <entry>Capabilities supported by the frontend</entry> | ||
| 111 | </row> | ||
| 112 | </tbody> | ||
| 113 | </tgroup> | ||
| 114 | </table> | ||
| 115 | |||
| 116 | <para>NOTE: The frequencies are specified in Hz for Terrestrial and Cable | ||
| 117 | systems. They're specified in kHz for Satellite systems</para> | ||
| 118 | </refsect1> | ||
| 119 | |||
| 120 | <refsect1 id="fe-caps-t"> | ||
| 121 | <title>frontend capabilities</title> | ||
| 122 | |||
| 123 | <para>Capabilities describe what a frontend can do. Some capabilities are | ||
| 124 | supported only on some specific frontend types.</para> | ||
| 125 | |||
| 126 | <table pgwide="1" frame="none" id="fe-caps"> | ||
| 127 | <title>enum fe_caps</title> | ||
| 128 | <tgroup cols="2"> | ||
| 129 | &cs-def; | ||
| 130 | <thead> | ||
| 131 | <row> | ||
| 132 | <entry>ID</entry> | ||
| 133 | <entry>Description</entry> | ||
| 134 | </row> | ||
| 135 | </thead> | ||
| 136 | <tbody valign="top"> | ||
| 137 | <row> | ||
| 138 | <entry id="FE-IS-STUPID"><constant>FE_IS_STUPID</constant></entry> | ||
| 139 | <entry>There's something wrong at the frontend, and it can't | ||
| 140 | report its capabilities</entry> | ||
| 141 | </row> | ||
| 142 | <row> | ||
| 143 | <entry id="FE-CAN-INVERSION-AUTO"><constant>FE_CAN_INVERSION_AUTO</constant></entry> | ||
| 144 | <entry>The frontend is capable of auto-detecting inversion</entry> | ||
| 145 | </row> | ||
| 146 | <row> | ||
| 147 | <entry id="FE-CAN-FEC-1-2"><constant>FE_CAN_FEC_1_2</constant></entry> | ||
| 148 | <entry>The frontend supports FEC 1/2</entry> | ||
| 149 | </row> | ||
| 150 | <row> | ||
| 151 | <entry id="FE-CAN-FEC-2-3"><constant>FE_CAN_FEC_2_3</constant></entry> | ||
| 152 | <entry>The frontend supports FEC 2/3</entry> | ||
| 153 | </row> | ||
| 154 | <row> | ||
| 155 | <entry id="FE-CAN-FEC-3-4"><constant>FE_CAN_FEC_3_4</constant></entry> | ||
| 156 | <entry>The frontend supports FEC 3/4</entry> | ||
| 157 | </row> | ||
| 158 | <row> | ||
| 159 | <entry id="FE-CAN-FEC-4-5"><constant>FE_CAN_FEC_4_5</constant></entry> | ||
| 160 | <entry>The frontend supports FEC 4/5</entry> | ||
| 161 | </row> | ||
| 162 | <row> | ||
| 163 | <entry id="FE-CAN-FEC-5-6"><constant>FE_CAN_FEC_5_6</constant></entry> | ||
| 164 | <entry>The frontend supports FEC 5/6</entry> | ||
| 165 | </row> | ||
| 166 | <row> | ||
| 167 | <entry id="FE-CAN-FEC-6-7"><constant>FE_CAN_FEC_6_7</constant></entry> | ||
| 168 | <entry>The frontend supports FEC 6/7</entry> | ||
| 169 | </row> | ||
| 170 | <row> | ||
| 171 | <entry id="FE-CAN-FEC-7-8"><constant>FE_CAN_FEC_7_8</constant></entry> | ||
| 172 | <entry>The frontend supports FEC 7/8</entry> | ||
| 173 | </row> | ||
| 174 | <row> | ||
| 175 | <entry id="FE-CAN-FEC-8-9"><constant>FE_CAN_FEC_8_9</constant></entry> | ||
| 176 | <entry>The frontend supports FEC 8/9</entry> | ||
| 177 | </row> | ||
| 178 | <row> | ||
| 179 | <entry id="FE-CAN-FEC-AUTO"><constant>FE_CAN_FEC_AUTO</constant></entry> | ||
| 180 | <entry>The frontend can autodetect FEC.</entry> | ||
| 181 | </row> | ||
| 182 | <row> | ||
| 183 | <entry id="FE-CAN-QPSK"><constant>FE_CAN_QPSK</constant></entry> | ||
| 184 | <entry>The frontend supports QPSK modulation</entry> | ||
| 185 | </row> | ||
| 186 | <row> | ||
| 187 | <entry id="FE-CAN-QAM-16"><constant>FE_CAN_QAM_16</constant></entry> | ||
| 188 | <entry>The frontend supports 16-QAM modulation</entry> | ||
| 189 | </row> | ||
| 190 | <row> | ||
| 191 | <entry id="FE-CAN-QAM-32"><constant>FE_CAN_QAM_32</constant></entry> | ||
| 192 | <entry>The frontend supports 32-QAM modulation</entry> | ||
| 193 | </row> | ||
| 194 | <row> | ||
| 195 | <entry id="FE-CAN-QAM-64"><constant>FE_CAN_QAM_64</constant></entry> | ||
| 196 | <entry>The frontend supports 64-QAM modulation</entry> | ||
| 197 | </row> | ||
| 198 | <row> | ||
| 199 | <entry id="FE-CAN-QAM-128"><constant>FE_CAN_QAM_128</constant></entry> | ||
| 200 | <entry>The frontend supports 128-QAM modulation</entry> | ||
| 201 | </row> | ||
| 202 | <row> | ||
| 203 | <entry id="FE-CAN-QAM-256"><constant>FE_CAN_QAM_256</constant></entry> | ||
| 204 | <entry>The frontend supports 256-QAM modulation</entry> | ||
| 205 | </row> | ||
| 206 | <row> | ||
| 207 | <entry id="FE-CAN-QAM-AUTO"><constant>FE_CAN_QAM_AUTO</constant></entry> | ||
| 208 | <entry>The frontend can autodetect modulation</entry> | ||
| 209 | </row> | ||
| 210 | <row> | ||
| 211 | <entry id="FE-CAN-TRANSMISSION-MODE-AUTO"><constant>FE_CAN_TRANSMISSION_MODE_AUTO</constant></entry> | ||
| 212 | <entry>The frontend can autodetect the transmission mode</entry> | ||
| 213 | </row> | ||
| 214 | <row> | ||
| 215 | <entry id="FE-CAN-BANDWIDTH-AUTO"><constant>FE_CAN_BANDWIDTH_AUTO</constant></entry> | ||
| 216 | <entry>The frontend can autodetect the bandwidth</entry> | ||
| 217 | </row> | ||
| 218 | <row> | ||
| 219 | <entry id="FE-CAN-GUARD-INTERVAL-AUTO"><constant>FE_CAN_GUARD_INTERVAL_AUTO</constant></entry> | ||
| 220 | <entry>The frontend can autodetect the guard interval</entry> | ||
| 221 | </row> | ||
| 222 | <row> | ||
| 223 | <entry id="FE-CAN-HIERARCHY-AUTO"><constant>FE_CAN_HIERARCHY_AUTO</constant></entry> | ||
| 224 | <entry>The frontend can autodetect hierarch</entry> | ||
| 225 | </row> | ||
| 226 | <row> | ||
| 227 | <entry id="FE-CAN-8VSB"><constant>FE_CAN_8VSB</constant></entry> | ||
| 228 | <entry>The frontend supports 8-VSB modulation</entry> | ||
| 229 | </row> | ||
| 230 | <row> | ||
| 231 | <entry id="FE-CAN-16VSB"><constant>FE_CAN_16VSB</constant></entry> | ||
| 232 | <entry>The frontend supports 16-VSB modulation</entry> | ||
| 233 | </row> | ||
| 234 | <row> | ||
| 235 | <entry id="FE-HAS-EXTENDED-CAPS"><constant>FE_HAS_EXTENDED_CAPS</constant></entry> | ||
| 236 | <entry>Currently, unused</entry> | ||
| 237 | </row> | ||
| 238 | <row> | ||
| 239 | <entry id="FE-CAN-MULTISTREAM"><constant>FE_CAN_MULTISTREAM</constant></entry> | ||
| 240 | <entry>The frontend supports multistream filtering</entry> | ||
| 241 | </row> | ||
| 242 | <row> | ||
| 243 | <entry id="FE-CAN-TURBO-FEC"><constant>FE_CAN_TURBO_FEC</constant></entry> | ||
| 244 | <entry>The frontend supports turbo FEC modulation</entry> | ||
| 245 | </row> | ||
| 246 | <row> | ||
| 247 | <entry id="FE-CAN-2G-MODULATION"><constant>FE_CAN_2G_MODULATION</constant></entry> | ||
| 248 | <entry>The frontend supports "2nd generation modulation" (DVB-S2/T2)></entry> | ||
| 249 | </row> | ||
| 250 | <row> | ||
| 251 | <entry id="FE-NEEDS-BENDING"><constant>FE_NEEDS_BENDING</constant></entry> | ||
| 252 | <entry>Not supported anymore, don't use it</entry> | ||
| 253 | </row> | ||
| 254 | <row> | ||
| 255 | <entry id="FE-CAN-RECOVER"><constant>FE_CAN_RECOVER</constant></entry> | ||
| 256 | <entry>The frontend can recover from a cable unplug automatically</entry> | ||
| 257 | </row> | ||
| 258 | <row> | ||
| 259 | <entry id="FE-CAN-MUTE-TS"><constant>FE_CAN_MUTE_TS</constant></entry> | ||
| 260 | <entry>The frontend can stop spurious TS data output</entry> | ||
| 261 | </row> | ||
| 262 | </tbody> | ||
| 263 | </tgroup> | ||
| 264 | </table> | ||
| 265 | </refsect1> | ||
| 266 | </refentry> | ||
| @@ -1,81 +0,0 @@ | |||
| 1 | <refentry id="FE_GET_PROPERTY"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_SET_PROPERTY, FE_GET_PROPERTY</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_SET_PROPERTY</refname> | ||
| 9 | <refname>FE_GET_PROPERTY</refname> | ||
| 10 | <refpurpose>FE_SET_PROPERTY sets one or more frontend properties. | ||
| 11 | FE_GET_PROPERTY returns one or more frontend properties.</refpurpose> | ||
| 12 | </refnamediv> | ||
| 13 | |||
| 14 | <refsynopsisdiv> | ||
| 15 | <funcsynopsis> | ||
| 16 | <funcprototype> | ||
| 17 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 18 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 19 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 20 | <paramdef>struct dtv_properties *<parameter>argp</parameter></paramdef> | ||
| 21 | </funcprototype> | ||
| 22 | </funcsynopsis> | ||
| 23 | </refsynopsisdiv> | ||
| 24 | |||
| 25 | <refsect1> | ||
| 26 | <title>Arguments</title> | ||
| 27 | <variablelist> | ||
| 28 | <varlistentry> | ||
| 29 | <term><parameter>fd</parameter></term> | ||
| 30 | <listitem> | ||
| 31 | <para>&fe_fd;</para> | ||
| 32 | </listitem> | ||
| 33 | </varlistentry> | ||
| 34 | <varlistentry> | ||
| 35 | <term><parameter>request</parameter></term> | ||
| 36 | <listitem> | ||
| 37 | <para>FE_SET_PROPERTY, FE_GET_PROPERTY</para> | ||
| 38 | </listitem> | ||
| 39 | </varlistentry> | ||
| 40 | <varlistentry> | ||
| 41 | <term><parameter>argp</parameter></term> | ||
| 42 | <listitem> | ||
| 43 | <para>pointer to &dtv-properties;</para> | ||
| 44 | </listitem> | ||
| 45 | </varlistentry> | ||
| 46 | </variablelist> | ||
| 47 | </refsect1> | ||
| 48 | |||
| 49 | <refsect1> | ||
| 50 | <title>Description</title> | ||
| 51 | |||
| 52 | <para>All DVB frontend devices support the | ||
| 53 | <constant>FE_SET_PROPERTY</constant> and <constant>FE_GET_PROPERTY</constant> | ||
| 54 | ioctls. The supported properties and statistics depends on the delivery system | ||
| 55 | and on the device:</para> | ||
| 56 | <itemizedlist> | ||
| 57 | <listitem> | ||
| 58 | <para><constant>FE_SET_PROPERTY:</constant></para> | ||
| 59 | <itemizedlist> | ||
| 60 | <listitem><para>This ioctl is used to set one or more | ||
| 61 | frontend properties.</para></listitem> | ||
| 62 | <listitem><para>This is the basic command to request the frontend to tune into some | ||
| 63 | frequency and to start decoding the digital TV signal.</para></listitem> | ||
| 64 | <listitem><para>This call requires read/write access to the device.</para></listitem> | ||
| 65 | <listitem><para>At return, the values are updated to reflect the | ||
| 66 | actual parameters used.</para></listitem> | ||
| 67 | </itemizedlist> | ||
| 68 | </listitem> | ||
| 69 | <listitem> | ||
| 70 | <para><constant>FE_GET_PROPERTY:</constant></para> | ||
| 71 | <itemizedlist> | ||
| 72 | <listitem><para>This ioctl is used to get properties and | ||
| 73 | statistics from the frontend.</para></listitem> | ||
| 74 | <listitem><para>No properties are changed, and statistics aren't reset.</para></listitem> | ||
| 75 | <listitem><para>This call only requires read-only access to the device.</para></listitem> | ||
| 76 | </itemizedlist> | ||
| 77 | </listitem> | ||
| 78 | </itemizedlist> | ||
| 79 | &return-value-dvb; | ||
| 80 | </refsect1> | ||
| 81 | </refentry> | ||
| @@ -1,107 +0,0 @@ | |||
| 1 | <refentry id="FE_READ_STATUS"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_READ_STATUS</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_READ_STATUS</refname> | ||
| 9 | <refpurpose>Returns status information about the front-end. This call only | ||
| 10 | requires read-only access to the device</refpurpose> | ||
| 11 | </refnamediv> | ||
| 12 | |||
| 13 | <refsynopsisdiv> | ||
| 14 | <funcsynopsis> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 18 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 19 | <paramdef>unsigned int *<parameter>status</parameter></paramdef> | ||
| 20 | </funcprototype> | ||
| 21 | </funcsynopsis> | ||
| 22 | </refsynopsisdiv> | ||
| 23 | |||
| 24 | <refsect1> | ||
| 25 | <title>Arguments</title> | ||
| 26 | <variablelist> | ||
| 27 | <varlistentry> | ||
| 28 | <term><parameter>fd</parameter></term> | ||
| 29 | <listitem> | ||
| 30 | <para>&fe_fd;</para> | ||
| 31 | </listitem> | ||
| 32 | </varlistentry> | ||
| 33 | <varlistentry> | ||
| 34 | <term><parameter>request</parameter></term> | ||
| 35 | <listitem> | ||
| 36 | <para>FE_READ_STATUS</para> | ||
| 37 | </listitem> | ||
| 38 | </varlistentry> | ||
| 39 | <varlistentry> | ||
| 40 | <term><parameter>status</parameter></term> | ||
| 41 | <listitem> | ||
| 42 | <para>pointer to a bitmask integer filled with the values defined by | ||
| 43 | &fe-status;.</para> | ||
| 44 | </listitem> | ||
| 45 | </varlistentry> | ||
| 46 | </variablelist> | ||
| 47 | </refsect1> | ||
| 48 | |||
| 49 | <refsect1> | ||
| 50 | <title>Description</title> | ||
| 51 | |||
| 52 | <para>All DVB frontend devices support the | ||
| 53 | <constant>FE_READ_STATUS</constant> ioctl. It is used to check about the | ||
| 54 | locking status of the frontend after being tuned. The ioctl takes a | ||
| 55 | pointer to an integer where the status will be written. | ||
| 56 | </para> | ||
| 57 | <para>NOTE: the size of status is actually sizeof(enum fe_status), with varies | ||
| 58 | according with the architecture. This needs to be fixed in the future.</para> | ||
| 59 | &return-value-dvb; | ||
| 60 | </refsect1> | ||
| 61 | |||
| 62 | <refsect1 id="fe-status-t"> | ||
| 63 | <title>int fe_status</title> | ||
| 64 | |||
| 65 | <para>The fe_status parameter is used to indicate the current state | ||
| 66 | and/or state changes of the frontend hardware. It is produced using | ||
| 67 | the &fe-status; values on a bitmask</para> | ||
| 68 | |||
| 69 | <table pgwide="1" frame="none" id="fe-status"> | ||
| 70 | <title>enum fe_status</title> | ||
| 71 | <tgroup cols="2"> | ||
| 72 | &cs-def; | ||
| 73 | <thead> | ||
| 74 | <row> | ||
| 75 | <entry>ID</entry> | ||
| 76 | <entry>Description</entry> | ||
| 77 | </row> | ||
| 78 | </thead> | ||
| 79 | <tbody valign="top"> | ||
| 80 | <row> | ||
| 81 | <entry align="char" id="FE-HAS-SIGNAL"><constant>FE_HAS_SIGNAL</constant></entry> | ||
| 82 | <entry align="char">The frontend has found something above the noise level</entry> | ||
| 83 | </row><row> | ||
| 84 | <entry align="char" id="FE-HAS-CARRIER"><constant>FE_HAS_CARRIER</constant></entry> | ||
| 85 | <entry align="char">The frontend has found a DVB signal</entry> | ||
| 86 | </row><row> | ||
| 87 | <entry align="char" id="FE-HAS-VITERBI"><constant>FE_HAS_VITERBI</constant></entry> | ||
| 88 | <entry align="char">The frontend FEC inner coding (Viterbi, LDPC or other inner code) is stable</entry> | ||
| 89 | </row><row> | ||
| 90 | <entry align="char" id="FE-HAS-SYNC"><constant>FE_HAS_SYNC</constant></entry> | ||
| 91 | <entry align="char">Synchronization bytes was found</entry> | ||
| 92 | </row><row> | ||
| 93 | <entry align="char" id="FE-HAS-LOCK"><constant>FE_HAS_LOCK</constant></entry> | ||
| 94 | <entry align="char">The DVB were locked and everything is working</entry> | ||
| 95 | </row><row> | ||
| 96 | <entry align="char" id="FE-TIMEDOUT"><constant>FE_TIMEDOUT</constant></entry> | ||
| 97 | <entry align="char">no lock within the last about 2 seconds</entry> | ||
| 98 | </row><row> | ||
| 99 | <entry align="char" id="FE-REINIT"><constant>FE_REINIT</constant></entry> | ||
| 100 | <entry align="char">The frontend was reinitialized, application is | ||
| 101 | recommended to reset DiSEqC, tone and parameters</entry> | ||
| 102 | </row> | ||
| 103 | </tbody> | ||
| 104 | </tgroup> | ||
| 105 | </table> | ||
| 106 | </refsect1> | ||
| 107 | </refentry> | ||
| @@ -1,64 +0,0 @@ | |||
| 1 | <refentry id="FE_SET_FRONTEND_TUNE_MODE"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_SET_FRONTEND_TUNE_MODE</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_SET_FRONTEND_TUNE_MODE</refname> | ||
| 9 | <refpurpose>Allow setting tuner mode flags to the frontend.</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcprototype> | ||
| 15 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 16 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 17 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 18 | <paramdef>unsigned int <parameter>flags</parameter></paramdef> | ||
| 19 | </funcprototype> | ||
| 20 | </funcsynopsis> | ||
| 21 | </refsynopsisdiv> | ||
| 22 | |||
| 23 | <refsect1> | ||
| 24 | <title>Arguments</title> | ||
| 25 | <variablelist> | ||
| 26 | <varlistentry> | ||
| 27 | <term><parameter>fd</parameter></term> | ||
| 28 | <listitem> | ||
| 29 | <para>&fe_fd;</para> | ||
| 30 | </listitem> | ||
| 31 | </varlistentry> | ||
| 32 | <varlistentry> | ||
| 33 | <term><parameter>request</parameter></term> | ||
| 34 | <listitem> | ||
| 35 | <para>FE_SET_FRONTEND_TUNE_MODE</para> | ||
| 36 | </listitem> | ||
| 37 | </varlistentry> | ||
| 38 | <varlistentry> | ||
| 39 | <term><parameter>flags</parameter></term> | ||
| 40 | <listitem> | ||
| 41 | <para>Valid flags:</para> | ||
| 42 | <itemizedlist> | ||
| 43 | <listitem><para>0 - normal tune mode</para></listitem> | ||
| 44 | <listitem><para>FE_TUNE_MODE_ONESHOT - When set, this flag will | ||
| 45 | disable any zigzagging or other "normal" tuning behaviour. | ||
| 46 | Additionally, there will be no automatic monitoring of the | ||
| 47 | lock status, and hence no frontend events will be | ||
| 48 | generated. If a frontend device is closed, this flag will | ||
| 49 | be automatically turned off when the device is reopened | ||
| 50 | read-write.</para></listitem> | ||
| 51 | </itemizedlist> | ||
| 52 | </listitem> | ||
| 53 | </varlistentry> | ||
| 54 | </variablelist> | ||
| 55 | </refsect1> | ||
| 56 | |||
| 57 | <refsect1> | ||
| 58 | <title>Description</title> | ||
| 59 | |||
| 60 | <para>Allow setting tuner mode flags to the frontend, between 0 (normal) | ||
| 61 | or FE_TUNE_MODE_ONESHOT mode</para> | ||
| 62 | &return-value-dvb; | ||
| 63 | </refsect1> | ||
| 64 | </refentry> | ||
| @@ -1,91 +0,0 @@ | |||
| 1 | <refentry id="FE_SET_TONE"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_SET_TONE</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_SET_TONE</refname> | ||
| 9 | <refpurpose>Sets/resets the generation of the continuous 22kHz tone.</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcprototype> | ||
| 15 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 16 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 17 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 18 | <paramdef>enum fe_sec_tone_mode *<parameter>tone</parameter></paramdef> | ||
| 19 | </funcprototype> | ||
| 20 | </funcsynopsis> | ||
| 21 | </refsynopsisdiv> | ||
| 22 | |||
| 23 | <refsect1> | ||
| 24 | <title>Arguments</title> | ||
| 25 | <variablelist> | ||
| 26 | <varlistentry> | ||
| 27 | <term><parameter>fd</parameter></term> | ||
| 28 | <listitem> | ||
| 29 | <para>&fe_fd;</para> | ||
| 30 | </listitem> | ||
| 31 | </varlistentry> | ||
| 32 | <varlistentry> | ||
| 33 | <term><parameter>request</parameter></term> | ||
| 34 | <listitem> | ||
| 35 | <para>FE_SET_TONE</para> | ||
| 36 | </listitem> | ||
| 37 | </varlistentry> | ||
| 38 | <varlistentry> | ||
| 39 | <term><parameter>tone</parameter></term> | ||
| 40 | <listitem> | ||
| 41 | <para>pointer to &fe-sec-tone-mode;</para> | ||
| 42 | </listitem> | ||
| 43 | </varlistentry> | ||
| 44 | </variablelist> | ||
| 45 | </refsect1> | ||
| 46 | |||
| 47 | <refsect1> | ||
| 48 | <title>Description</title> | ||
| 49 | |||
| 50 | <para>This ioctl is used to set the generation of the continuous 22kHz tone. | ||
| 51 | This call requires read/write permissions.</para> | ||
| 52 | <para>Usually, satellite antenna subsystems require that the digital TV | ||
| 53 | device to send a 22kHz tone in order to select between high/low band on | ||
| 54 | some dual-band LNBf. It is also used to send signals to DiSEqC equipment, | ||
| 55 | but this is done using the DiSEqC ioctls.</para> | ||
| 56 | <para>NOTE: if more than one device is connected to the same antenna, | ||
| 57 | setting a tone may interfere on other devices, as they may lose | ||
| 58 | the capability of selecting the band. So, it is recommended that | ||
| 59 | applications would change to SEC_TONE_OFF when the device is not used.</para> | ||
| 60 | |||
| 61 | &return-value-dvb; | ||
| 62 | </refsect1> | ||
| 63 | |||
| 64 | <refsect1 id="fe-sec-tone-mode-t"> | ||
| 65 | <title>enum fe_sec_tone_mode</title> | ||
| 66 | |||
| 67 | <table pgwide="1" frame="none" id="fe-sec-tone-mode"> | ||
| 68 | <title>enum fe_sec_tone_mode</title> | ||
| 69 | <tgroup cols="2"> | ||
| 70 | &cs-def; | ||
| 71 | <thead> | ||
| 72 | <row> | ||
| 73 | <entry>ID</entry> | ||
| 74 | <entry>Description</entry> | ||
| 75 | </row> | ||
| 76 | </thead> | ||
| 77 | <tbody valign="top"> | ||
| 78 | <row> | ||
| 79 | <entry align="char" id="SEC-TONE-ON"><constant>SEC_TONE_ON</constant></entry> | ||
| 80 | <entry align="char">Sends a 22kHz tone burst to the antenna</entry> | ||
| 81 | </row><row> | ||
| 82 | <entry align="char" id="SEC-TONE-OFF"><constant>SEC_TONE_OFF</constant></entry> | ||
| 83 | <entry align="char">Don't send a 22kHz tone to the antenna | ||
| 84 | (except if the FE_DISEQC_* ioctls are called)</entry> | ||
| 85 | </row> | ||
| 86 | </tbody> | ||
| 87 | </tgroup> | ||
| 88 | </table> | ||
| 89 | </refsect1> | ||
| 90 | |||
| 91 | </refentry> | ||
| @@ -1,69 +0,0 @@ | |||
| 1 | <refentry id="FE_SET_VOLTAGE"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl FE_SET_VOLTAGE</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>FE_SET_VOLTAGE</refname> | ||
| 9 | <refpurpose>Allow setting the DC level sent to the antenna subsystem.</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcprototype> | ||
| 15 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 16 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 17 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 18 | <paramdef>enum fe_sec_voltage *<parameter>voltage</parameter></paramdef> | ||
| 19 | </funcprototype> | ||
| 20 | </funcsynopsis> | ||
| 21 | </refsynopsisdiv> | ||
| 22 | |||
| 23 | <refsect1> | ||
| 24 | <title>Arguments</title> | ||
| 25 | <variablelist> | ||
| 26 | <varlistentry> | ||
| 27 | <term><parameter>fd</parameter></term> | ||
| 28 | <listitem> | ||
| 29 | <para>&fe_fd;</para> | ||
| 30 | </listitem> | ||
| 31 | </varlistentry> | ||
| 32 | <varlistentry> | ||
| 33 | <term><parameter>request</parameter></term> | ||
| 34 | <listitem> | ||
| 35 | <para>FE_SET_VOLTAGE</para> | ||
| 36 | </listitem> | ||
| 37 | </varlistentry> | ||
| 38 | <varlistentry> | ||
| 39 | <term><parameter>voltage</parameter></term> | ||
| 40 | <listitem> | ||
| 41 | <para>pointer to &fe-sec-voltage;</para> | ||
| 42 | <para>Valid values are described at &fe-sec-voltage;.</para> | ||
| 43 | </listitem> | ||
| 44 | </varlistentry> | ||
| 45 | </variablelist> | ||
| 46 | </refsect1> | ||
| 47 | |||
| 48 | <refsect1> | ||
| 49 | <title>Description</title> | ||
| 50 | |||
| 51 | <para>This ioctl allows to set the DC voltage level sent through the antenna | ||
| 52 | cable to 13V, 18V or off.</para> | ||
| 53 | <para>Usually, a satellite antenna subsystems require that the digital TV | ||
| 54 | device to send a DC voltage to feed power to the LNBf. Depending on the | ||
| 55 | LNBf type, the polarization or the intermediate frequency (IF) of the LNBf | ||
| 56 | can controlled by the voltage level. Other devices (for example, the ones | ||
| 57 | that implement DISEqC and multipoint LNBf's don't need to control the | ||
| 58 | voltage level, provided that either 13V or 18V is sent to power up the | ||
| 59 | LNBf.</para> | ||
| 60 | <para>NOTE: if more than one device is connected to the same antenna, | ||
| 61 | setting a voltage level may interfere on other devices, as they may lose | ||
| 62 | the capability of setting polarization or IF. So, on those | ||
| 63 | cases, setting the voltage to SEC_VOLTAGE_OFF while the device is not is | ||
| 64 | used is recommended.</para> | ||
| 65 | |||
| 66 | &return-value-dvb; | ||
| 67 | </refsect1> | ||
| 68 | |||
| 69 | </refentry> | ||
| @@ -1,269 +0,0 @@ | |||
| 1 | <title>DVB Frontend API</title> | ||
| 2 | |||
| 3 | <para>The DVB frontend API was designed to support three types of delivery systems:</para> | ||
| 4 | <itemizedlist> | ||
| 5 | <listitem><para>Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H, DTMB, CMMB</para></listitem> | ||
| 6 | <listitem><para>Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B), ISDB-C</para></listitem> | ||
| 7 | <listitem><para>Satellite systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS</para></listitem> | ||
| 8 | </itemizedlist> | ||
| 9 | <para>The DVB frontend controls several sub-devices including:</para> | ||
| 10 | <itemizedlist> | ||
| 11 | <listitem><para>Tuner</para></listitem> | ||
| 12 | <listitem><para>Digital TV demodulator</para></listitem> | ||
| 13 | <listitem><para>Low noise amplifier (LNA)</para></listitem> | ||
| 14 | <listitem><para>Satellite Equipment Control (SEC) hardware (only for Satellite).</para></listitem> | ||
| 15 | </itemizedlist> | ||
| 16 | <para>The frontend can be accessed through | ||
| 17 | <constant>/dev/dvb/adapter?/frontend?</constant>. Data types and | ||
| 18 | ioctl definitions can be accessed by including | ||
| 19 | <constant>linux/dvb/frontend.h</constant> in your application. | ||
| 20 | </para> | ||
| 21 | |||
| 22 | <para>NOTE: Transmission via the internet (DVB-IP) | ||
| 23 | is not yet handled by this API but a future extension is possible.</para> | ||
| 24 | <para>On Satellite systems, the API support for the Satellite Equipment Control | ||
| 25 | (SEC) allows to power control and to send/receive signals to control the | ||
| 26 | antenna subsystem, selecting the polarization and choosing the Intermediate | ||
| 27 | Frequency IF) of the Low Noise Block Converter Feed Horn (LNBf). It | ||
| 28 | supports the DiSEqC and V-SEC protocols. The DiSEqC (digital SEC) | ||
| 29 | specification is available at | ||
| 30 | <ulink url="http://www.eutelsat.com/satellites/4_5_5.html">Eutelsat</ulink>.</para> | ||
| 31 | |||
| 32 | <section id="query-dvb-frontend-info"> | ||
| 33 | <title>Querying frontend information</title> | ||
| 34 | |||
| 35 | <para>Usually, the first thing to do when the frontend is opened is to | ||
| 36 | check the frontend capabilities. This is done using <link linkend="FE_GET_INFO">FE_GET_INFO</link>. This ioctl will enumerate | ||
| 37 | the DVB API version and other characteristics about the frontend, and | ||
| 38 | can be opened either in read only or read/write mode.</para> | ||
| 39 | </section> | ||
| 40 | |||
| 41 | <section id="dvb-fe-read-status"> | ||
| 42 | <title>Querying frontend status and statistics</title> | ||
| 43 | |||
| 44 | <para>Once <link linkend="FE_GET_PROPERTY"><constant>FE_SET_PROPERTY</constant></link> | ||
| 45 | is called, the frontend will run a kernel thread that will periodically | ||
| 46 | check for the tuner lock status and provide statistics about the quality | ||
| 47 | of the signal.</para> | ||
| 48 | <para>The information about the frontend tuner locking status can be queried | ||
| 49 | using <link linkend="FE_READ_STATUS">FE_READ_STATUS</link>.</para> | ||
| 50 | <para>Signal statistics are provided via <link linkend="FE_GET_PROPERTY"><constant>FE_GET_PROPERTY</constant></link>. | ||
| 51 | Please note that several statistics require the demodulator to be fully | ||
| 52 | locked (e. g. with FE_HAS_LOCK bit set). See | ||
| 53 | <link linkend="frontend-stat-properties">Frontend statistics indicators</link> | ||
| 54 | for more details.</para> | ||
| 55 | </section> | ||
| 56 | |||
| 57 | &sub-dvbproperty; | ||
| 58 | |||
| 59 | <section id="frontend_fcalls"> | ||
| 60 | <title>Frontend Function Calls</title> | ||
| 61 | |||
| 62 | <refentry id="frontend_f_open"> | ||
| 63 | <refmeta> | ||
| 64 | <refentrytitle>DVB frontend open()</refentrytitle> | ||
| 65 | &manvol; | ||
| 66 | </refmeta> | ||
| 67 | |||
| 68 | <refnamediv> | ||
| 69 | <refname>fe-open</refname> | ||
| 70 | <refpurpose>Open a frontend device</refpurpose> | ||
| 71 | </refnamediv> | ||
| 72 | |||
| 73 | <refsynopsisdiv> | ||
| 74 | <funcsynopsis> | ||
| 75 | <funcsynopsisinfo>#include <fcntl.h></funcsynopsisinfo> | ||
| 76 | <funcprototype> | ||
| 77 | <funcdef>int <function>open</function></funcdef> | ||
| 78 | <paramdef>const char *<parameter>device_name</parameter></paramdef> | ||
| 79 | <paramdef>int <parameter>flags</parameter></paramdef> | ||
| 80 | </funcprototype> | ||
| 81 | </funcsynopsis> | ||
| 82 | </refsynopsisdiv> | ||
| 83 | |||
| 84 | <refsect1> | ||
| 85 | <title>Arguments</title> | ||
| 86 | |||
| 87 | <variablelist> | ||
| 88 | <varlistentry> | ||
| 89 | <term><parameter>device_name</parameter></term> | ||
| 90 | <listitem> | ||
| 91 | <para>Device to be opened.</para> | ||
| 92 | </listitem> | ||
| 93 | </varlistentry> | ||
| 94 | <varlistentry> | ||
| 95 | <term><parameter>flags</parameter></term> | ||
| 96 | <listitem> | ||
| 97 | <para>Open flags. Access can either be | ||
| 98 | <constant>O_RDWR</constant> or <constant>O_RDONLY</constant>.</para> | ||
| 99 | <para>Multiple opens are allowed with <constant>O_RDONLY</constant>. In this mode, only query and read ioctls are allowed.</para> | ||
| 100 | <para>Only one open is allowed in <constant>O_RDWR</constant>. In this mode, all ioctls are allowed.</para> | ||
| 101 | <para>When the <constant>O_NONBLOCK</constant> flag is given, the system calls may return &EAGAIN; when no data is available or when the device driver is temporarily busy.</para> | ||
| 102 | <para>Other flags have no effect.</para> | ||
| 103 | </listitem> | ||
| 104 | </varlistentry> | ||
| 105 | </variablelist> | ||
| 106 | </refsect1> | ||
| 107 | <refsect1> | ||
| 108 | <title>Description</title> | ||
| 109 | <para>This system call opens a named frontend device (<constant>/dev/dvb/adapter?/frontend?</constant>) | ||
| 110 | for subsequent use. Usually the first thing to do after a successful open is to | ||
| 111 | find out the frontend type with <link linkend="FE_GET_INFO">FE_GET_INFO</link>.</para> | ||
| 112 | <para>The device can be opened in read-only mode, which only allows monitoring of | ||
| 113 | device status and statistics, or read/write mode, which allows any kind of use | ||
| 114 | (e.g. performing tuning operations.) | ||
| 115 | </para> | ||
| 116 | <para>In a system with multiple front-ends, it is usually the case that multiple devices | ||
| 117 | cannot be open in read/write mode simultaneously. As long as a front-end | ||
| 118 | device is opened in read/write mode, other open() calls in read/write mode will | ||
| 119 | either fail or block, depending on whether non-blocking or blocking mode was | ||
| 120 | specified. A front-end device opened in blocking mode can later be put into | ||
| 121 | non-blocking mode (and vice versa) using the F_SETFL command of the fcntl | ||
| 122 | system call. This is a standard system call, documented in the Linux manual | ||
| 123 | page for fcntl. When an open() call has succeeded, the device will be ready | ||
| 124 | for use in the specified mode. This implies that the corresponding hardware is | ||
| 125 | powered up, and that other front-ends may have been powered down to make | ||
| 126 | that possible.</para> | ||
| 127 | </refsect1> | ||
| 128 | |||
| 129 | <refsect1> | ||
| 130 | <title>Return Value</title> | ||
| 131 | |||
| 132 | <para>On success <function>open</function> returns the new file | ||
| 133 | descriptor. On error -1 is returned, and the <varname>errno</varname> | ||
| 134 | variable is set appropriately. Possible error codes are:</para> | ||
| 135 | |||
| 136 | <variablelist> | ||
| 137 | <varlistentry> | ||
| 138 | <term><errorcode>EACCES</errorcode></term> | ||
| 139 | <listitem> | ||
| 140 | <para>The caller has no permission to access the | ||
| 141 | device.</para> | ||
| 142 | </listitem> | ||
| 143 | </varlistentry> | ||
| 144 | <varlistentry> | ||
| 145 | <term><errorcode>EBUSY</errorcode></term> | ||
| 146 | <listitem> | ||
| 147 | <para>The the device driver is already in use.</para> | ||
| 148 | </listitem> | ||
| 149 | </varlistentry> | ||
| 150 | <varlistentry> | ||
| 151 | <term><errorcode>ENXIO</errorcode></term> | ||
| 152 | <listitem> | ||
| 153 | <para>No device corresponding to this device special file | ||
| 154 | exists.</para> | ||
| 155 | </listitem> | ||
| 156 | </varlistentry> | ||
| 157 | <varlistentry> | ||
| 158 | <term><errorcode>ENOMEM</errorcode></term> | ||
| 159 | <listitem> | ||
| 160 | <para>Not enough kernel memory was available to complete the | ||
| 161 | request.</para> | ||
| 162 | </listitem> | ||
| 163 | </varlistentry> | ||
| 164 | <varlistentry> | ||
| 165 | <term><errorcode>EMFILE</errorcode></term> | ||
| 166 | <listitem> | ||
| 167 | <para>The process already has the maximum number of | ||
| 168 | files open.</para> | ||
| 169 | </listitem> | ||
| 170 | </varlistentry> | ||
| 171 | <varlistentry> | ||
| 172 | <term><errorcode>ENFILE</errorcode></term> | ||
| 173 | <listitem> | ||
| 174 | <para>The limit on the total number of files open on the | ||
| 175 | system has been reached.</para> | ||
| 176 | </listitem> | ||
| 177 | </varlistentry> | ||
| 178 | <varlistentry> | ||
| 179 | <term><errorcode>ENODEV</errorcode></term> | ||
| 180 | <listitem> | ||
| 181 | <para>The device got removed.</para> | ||
| 182 | </listitem> | ||
| 183 | </varlistentry> | ||
| 184 | </variablelist> | ||
| 185 | </refsect1> | ||
| 186 | </refentry> | ||
| 187 | |||
| 188 | <refentry id="frontend_f_close"> | ||
| 189 | <refmeta> | ||
| 190 | <refentrytitle>DVB frontend close()</refentrytitle> | ||
| 191 | &manvol; | ||
| 192 | </refmeta> | ||
| 193 | |||
| 194 | <refnamediv> | ||
| 195 | <refname>fe-close</refname> | ||
| 196 | <refpurpose>Close a frontend device</refpurpose> | ||
| 197 | </refnamediv> | ||
| 198 | |||
| 199 | <refsynopsisdiv> | ||
| 200 | <funcsynopsis> | ||
| 201 | <funcsynopsisinfo>#include <unistd.h></funcsynopsisinfo> | ||
| 202 | <funcprototype> | ||
| 203 | <funcdef>int <function>close</function></funcdef> | ||
| 204 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 205 | </funcprototype> | ||
| 206 | </funcsynopsis> | ||
| 207 | </refsynopsisdiv> | ||
| 208 | |||
| 209 | <refsect1> | ||
| 210 | <title>Arguments</title> | ||
| 211 | |||
| 212 | <variablelist> | ||
| 213 | <varlistentry> | ||
| 214 | <term><parameter>fd</parameter></term> | ||
| 215 | <listitem> | ||
| 216 | <para>&fd;</para> | ||
| 217 | </listitem> | ||
| 218 | </varlistentry> | ||
| 219 | </variablelist> | ||
| 220 | </refsect1> | ||
| 221 | |||
| 222 | <refsect1> | ||
| 223 | <title>Description</title> | ||
| 224 | <para>This system call closes a previously opened front-end device. After closing | ||
| 225 | a front-end device, its corresponding hardware might be powered down | ||
| 226 | automatically.</para> | ||
| 227 | </refsect1> | ||
| 228 | <refsect1> | ||
| 229 | <title>Return Value</title> | ||
| 230 | |||
| 231 | <para>The function returns <returnvalue>0</returnvalue> on | ||
| 232 | success, <returnvalue>-1</returnvalue> on failure and the | ||
| 233 | <varname>errno</varname> is set appropriately. Possible error | ||
| 234 | codes:</para> | ||
| 235 | |||
| 236 | <variablelist> | ||
| 237 | <varlistentry> | ||
| 238 | <term><errorcode>EBADF</errorcode></term> | ||
| 239 | <listitem> | ||
| 240 | <para><parameter>fd</parameter> is not a valid open file | ||
| 241 | descriptor.</para> | ||
| 242 | </listitem> | ||
| 243 | </varlistentry> | ||
| 244 | </variablelist> | ||
| 245 | </refsect1> | ||
| 246 | </refentry> | ||
| 247 | |||
| 248 | &sub-fe-get-info; | ||
| 249 | &sub-fe-read-status; | ||
| 250 | &sub-fe-get-property; | ||
| 251 | &sub-fe-diseqc-reset-overload; | ||
| 252 | &sub-fe-diseqc-send-master-cmd; | ||
| 253 | &sub-fe-diseqc-recv-slave-reply; | ||
| 254 | &sub-fe-diseqc-send-burst; | ||
| 255 | &sub-fe-set-tone; | ||
| 256 | &sub-fe-set-voltage; | ||
| 257 | &sub-fe-enable-high-lnb-voltage; | ||
| 258 | &sub-fe-set-frontend-tune-mode; | ||
| 259 | |||
| 260 | </section> | ||
| 261 | |||
| 262 | <section id="frontend_legacy_dvbv3_api"> | ||
| 263 | <title>DVB Frontend legacy API (a. k. a. DVBv3)</title> | ||
| 264 | <para>The usage of this API is deprecated, as it doesn't support all digital | ||
| 265 | TV standards, doesn't provide good statistics measurements and provides | ||
| 266 | incomplete information. This is kept only to support legacy applications.</para> | ||
| 267 | |||
| 268 | &sub-frontend_legacy_api; | ||
| 269 | </section> | ||
| @@ -1,654 +0,0 @@ | |||
| 1 | <section id="frontend_legacy_types"> | ||
| 2 | <title>Frontend Legacy Data Types</title> | ||
| 3 | |||
| 4 | <section id="fe-type-t"> | ||
| 5 | <title>Frontend type</title> | ||
| 6 | |||
| 7 | <para>For historical reasons, frontend types are named by the type of modulation | ||
| 8 | used in transmission. The fontend types are given by fe_type_t type, defined as:</para> | ||
| 9 | |||
| 10 | <table pgwide="1" frame="none" id="fe-type"> | ||
| 11 | <title>Frontend types</title> | ||
| 12 | <tgroup cols="3"> | ||
| 13 | &cs-def; | ||
| 14 | <thead> | ||
| 15 | <row> | ||
| 16 | <entry>fe_type</entry> | ||
| 17 | <entry>Description</entry> | ||
| 18 | <entry><link linkend="DTV-DELIVERY-SYSTEM">DTV_DELIVERY_SYSTEM</link> equivalent type</entry> | ||
| 19 | </row> | ||
| 20 | </thead> | ||
| 21 | <tbody valign="top"> | ||
| 22 | <row> | ||
| 23 | <entry id="FE-QPSK"><constant>FE_QPSK</constant></entry> | ||
| 24 | <entry>For DVB-S standard</entry> | ||
| 25 | <entry><constant>SYS_DVBS</constant></entry> | ||
| 26 | </row> | ||
| 27 | <row> | ||
| 28 | <entry id="FE-QAM"><constant>FE_QAM</constant></entry> | ||
| 29 | <entry>For DVB-C annex A standard</entry> | ||
| 30 | <entry><constant>SYS_DVBC_ANNEX_A</constant></entry> | ||
| 31 | </row> | ||
| 32 | <row> | ||
| 33 | <entry id="FE-OFDM"><constant>FE_OFDM</constant></entry> | ||
| 34 | <entry>For DVB-T standard</entry> | ||
| 35 | <entry><constant>SYS_DVBT</constant></entry> | ||
| 36 | </row> | ||
| 37 | <row> | ||
| 38 | <entry id="FE-ATSC"><constant>FE_ATSC</constant></entry> | ||
| 39 | <entry>For ATSC standard (terrestrial) or for DVB-C Annex B (cable) used in US.</entry> | ||
| 40 | <entry><constant>SYS_ATSC</constant> (terrestrial) or <constant>SYS_DVBC_ANNEX_B</constant> (cable)</entry> | ||
| 41 | </row> | ||
| 42 | </tbody></tgroup></table> | ||
| 43 | |||
| 44 | <para>Newer formats like DVB-S2, ISDB-T, ISDB-S and DVB-T2 are not described at the above, as they're | ||
| 45 | supported via the new <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY/FE_GET_SET_PROPERTY</link> ioctl's, using the <link linkend="DTV-DELIVERY-SYSTEM">DTV_DELIVERY_SYSTEM</link> parameter. | ||
| 46 | </para> | ||
| 47 | |||
| 48 | <para>In the old days, &dvb-frontend-info; used to contain | ||
| 49 | <constant>fe_type_t</constant> field to indicate the delivery systems, | ||
| 50 | filled with either FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC. While this is | ||
| 51 | still filled to keep backward compatibility, the usage of this | ||
| 52 | field is deprecated, as it can report just one delivery system, but some | ||
| 53 | devices support multiple delivery systems. Please use | ||
| 54 | <link linkend="DTV-ENUM-DELSYS">DTV_ENUM_DELSYS</link> instead. | ||
| 55 | </para> | ||
| 56 | <para>On devices that support multiple delivery systems, | ||
| 57 | &dvb-frontend-info;::<constant>fe_type_t</constant> is filled with the | ||
| 58 | currently standard, as selected by the last call to | ||
| 59 | <link linkend="FE_GET_PROPERTY">FE_SET_PROPERTY</link> | ||
| 60 | using the &DTV-DELIVERY-SYSTEM; property.</para> | ||
| 61 | </section> | ||
| 62 | |||
| 63 | <section id="fe-bandwidth-t"> | ||
| 64 | <title>Frontend bandwidth</title> | ||
| 65 | |||
| 66 | <table pgwide="1" frame="none" id="fe-bandwidth"> | ||
| 67 | <title>enum fe_bandwidth</title> | ||
| 68 | <tgroup cols="2"> | ||
| 69 | &cs-def; | ||
| 70 | <thead> | ||
| 71 | <row> | ||
| 72 | <entry>ID</entry> | ||
| 73 | <entry>Description</entry> | ||
| 74 | </row> | ||
| 75 | </thead> | ||
| 76 | <tbody valign="top"> | ||
| 77 | <row> | ||
| 78 | <entry id="BANDWIDTH-AUTO"><constant>BANDWIDTH_AUTO</constant></entry> | ||
| 79 | <entry>Autodetect bandwidth (if supported)</entry> | ||
| 80 | </row><row> | ||
| 81 | <entry id="BANDWIDTH-1-712-MHZ"><constant>BANDWIDTH_1_712_MHZ</constant></entry> | ||
| 82 | <entry>1.712 MHz</entry> | ||
| 83 | </row><row> | ||
| 84 | <entry id="BANDWIDTH-5-MHZ"><constant>BANDWIDTH_5_MHZ</constant></entry> | ||
| 85 | <entry>5 MHz</entry> | ||
| 86 | </row><row> | ||
| 87 | <entry id="BANDWIDTH-6-MHZ"><constant>BANDWIDTH_6_MHZ</constant></entry> | ||
| 88 | <entry>6 MHz</entry> | ||
| 89 | </row><row> | ||
| 90 | <entry id="BANDWIDTH-7-MHZ"><constant>BANDWIDTH_7_MHZ</constant></entry> | ||
| 91 | <entry>7 MHz</entry> | ||
| 92 | </row><row> | ||
| 93 | <entry id="BANDWIDTH-8-MHZ"><constant>BANDWIDTH_8_MHZ</constant></entry> | ||
| 94 | <entry>8 MHz</entry> | ||
| 95 | </row><row> | ||
| 96 | <entry id="BANDWIDTH-10-MHZ"><constant>BANDWIDTH_10_MHZ</constant></entry> | ||
| 97 | <entry>10 MHz</entry> | ||
| 98 | </row> | ||
| 99 | </tbody> | ||
| 100 | </tgroup> | ||
| 101 | </table> | ||
| 102 | |||
| 103 | </section> | ||
| 104 | |||
| 105 | <section id="dvb-frontend-parameters"> | ||
| 106 | <title>frontend parameters</title> | ||
| 107 | <para>The kind of parameters passed to the frontend device for tuning depend on | ||
| 108 | the kind of hardware you are using.</para> | ||
| 109 | <para>The struct <constant>dvb_frontend_parameters</constant> uses an | ||
| 110 | union with specific per-system parameters. However, as newer delivery systems | ||
| 111 | required more data, the structure size weren't enough to fit, and just | ||
| 112 | extending its size would break the existing applications. So, those parameters | ||
| 113 | were replaced by the usage of <link linkend="FE_GET_PROPERTY"> | ||
| 114 | <constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant></link> ioctl's. The | ||
| 115 | new API is flexible enough to add new parameters to existing delivery systems, | ||
| 116 | and to add newer delivery systems.</para> | ||
| 117 | <para>So, newer applications should use <link linkend="FE_GET_PROPERTY"> | ||
| 118 | <constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant></link> instead, in | ||
| 119 | order to be able to support the newer System Delivery like DVB-S2, DVB-T2, | ||
| 120 | DVB-C2, ISDB, etc.</para> | ||
| 121 | <para>All kinds of parameters are combined as an union in the FrontendParameters structure: | ||
| 122 | <programlisting> | ||
| 123 | struct dvb_frontend_parameters { | ||
| 124 | uint32_t frequency; /⋆ (absolute) frequency in Hz for QAM/OFDM ⋆/ | ||
| 125 | /⋆ intermediate frequency in kHz for QPSK ⋆/ | ||
| 126 | &fe-spectral-inversion-t; inversion; | ||
| 127 | union { | ||
| 128 | struct dvb_qpsk_parameters qpsk; | ||
| 129 | struct dvb_qam_parameters qam; | ||
| 130 | struct dvb_ofdm_parameters ofdm; | ||
| 131 | struct dvb_vsb_parameters vsb; | ||
| 132 | } u; | ||
| 133 | }; | ||
| 134 | </programlisting></para> | ||
| 135 | <para>In the case of QPSK frontends the <constant>frequency</constant> field specifies the intermediate | ||
| 136 | frequency, i.e. the offset which is effectively added to the local oscillator frequency (LOF) of | ||
| 137 | the LNB. The intermediate frequency has to be specified in units of kHz. For QAM and | ||
| 138 | OFDM frontends the <constant>frequency</constant> specifies the absolute frequency and is given in Hz. | ||
| 139 | </para> | ||
| 140 | |||
| 141 | <section id="dvb-qpsk-parameters"> | ||
| 142 | <title>QPSK parameters</title> | ||
| 143 | <para>For satellite QPSK frontends you have to use the <constant>dvb_qpsk_parameters</constant> structure:</para> | ||
| 144 | <programlisting> | ||
| 145 | struct dvb_qpsk_parameters { | ||
| 146 | uint32_t symbol_rate; /⋆ symbol rate in Symbols per second ⋆/ | ||
| 147 | &fe-code-rate-t; fec_inner; /⋆ forward error correction (see above) ⋆/ | ||
| 148 | }; | ||
| 149 | </programlisting> | ||
| 150 | </section> | ||
| 151 | |||
| 152 | <section id="dvb-qam-parameters"> | ||
| 153 | <title>QAM parameters</title> | ||
| 154 | <para>for cable QAM frontend you use the <constant>dvb_qam_parameters</constant> structure:</para> | ||
| 155 | <programlisting> | ||
| 156 | struct dvb_qam_parameters { | ||
| 157 | uint32_t symbol_rate; /⋆ symbol rate in Symbols per second ⋆/ | ||
| 158 | &fe-code-rate-t; fec_inner; /⋆ forward error correction (see above) ⋆/ | ||
| 159 | &fe-modulation-t; modulation; /⋆ modulation type (see above) ⋆/ | ||
| 160 | }; | ||
| 161 | </programlisting> | ||
| 162 | </section> | ||
| 163 | |||
| 164 | <section id="dvb-vsb-parameters"> | ||
| 165 | <title>VSB parameters</title> | ||
| 166 | <para>ATSC frontends are supported by the <constant>dvb_vsb_parameters</constant> structure:</para> | ||
| 167 | <programlisting> | ||
| 168 | struct dvb_vsb_parameters { | ||
| 169 | &fe-modulation-t; modulation; /⋆ modulation type (see above) ⋆/ | ||
| 170 | }; | ||
| 171 | </programlisting> | ||
| 172 | </section> | ||
| 173 | |||
| 174 | <section id="dvb-ofdm-parameters"> | ||
| 175 | <title>OFDM parameters</title> | ||
| 176 | <para>DVB-T frontends are supported by the <constant>dvb_ofdm_parameters</constant> structure:</para> | ||
| 177 | <programlisting> | ||
| 178 | struct dvb_ofdm_parameters { | ||
| 179 | &fe-bandwidth-t; bandwidth; | ||
| 180 | &fe-code-rate-t; code_rate_HP; /⋆ high priority stream code rate ⋆/ | ||
| 181 | &fe-code-rate-t; code_rate_LP; /⋆ low priority stream code rate ⋆/ | ||
| 182 | &fe-modulation-t; constellation; /⋆ modulation type (see above) ⋆/ | ||
| 183 | &fe-transmit-mode-t; transmission_mode; | ||
| 184 | &fe-guard-interval-t; guard_interval; | ||
| 185 | &fe-hierarchy-t; hierarchy_information; | ||
| 186 | }; | ||
| 187 | </programlisting> | ||
| 188 | </section> | ||
| 189 | </section> | ||
| 190 | |||
| 191 | <section id="dvb-frontend-event"> | ||
| 192 | <title>frontend events</title> | ||
| 193 | <programlisting> | ||
| 194 | struct dvb_frontend_event { | ||
| 195 | fe_status_t status; | ||
| 196 | struct dvb_frontend_parameters parameters; | ||
| 197 | }; | ||
| 198 | </programlisting> | ||
| 199 | </section> | ||
| 200 | </section> | ||
| 201 | |||
| 202 | <section id="frontend_legacy_fcalls"> | ||
| 203 | <title>Frontend Legacy Function Calls</title> | ||
| 204 | |||
| 205 | <para>Those functions are defined at DVB version 3. The support is kept in | ||
| 206 | the kernel due to compatibility issues only. Their usage is strongly | ||
| 207 | not recommended</para> | ||
| 208 | |||
| 209 | <section id="FE_READ_BER"> | ||
| 210 | <title>FE_READ_BER</title> | ||
| 211 | <para>DESCRIPTION | ||
| 212 | </para> | ||
| 213 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 214 | align="char"> | ||
| 215 | <para>This ioctl call returns the bit error rate for the signal currently | ||
| 216 | received/demodulated by the front-end. For this command, read-only access to | ||
| 217 | the device is sufficient.</para> | ||
| 218 | </entry> | ||
| 219 | </row></tbody></tgroup></informaltable> | ||
| 220 | <para>SYNOPSIS | ||
| 221 | </para> | ||
| 222 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 223 | align="char"> | ||
| 224 | <para>int ioctl(int fd, int request = <link linkend="FE_READ_BER">FE_READ_BER</link>, | ||
| 225 | uint32_t ⋆ber);</para> | ||
| 226 | </entry> | ||
| 227 | </row></tbody></tgroup></informaltable> | ||
| 228 | <para>PARAMETERS | ||
| 229 | </para> | ||
| 230 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 231 | align="char"> | ||
| 232 | <para>int fd</para> | ||
| 233 | </entry><entry | ||
| 234 | align="char"> | ||
| 235 | <para>File descriptor returned by a previous call to open().</para> | ||
| 236 | </entry> | ||
| 237 | </row><row><entry | ||
| 238 | align="char"> | ||
| 239 | <para>int request</para> | ||
| 240 | </entry><entry | ||
| 241 | align="char"> | ||
| 242 | <para>Equals <link linkend="FE_READ_BER">FE_READ_BER</link> for this command.</para> | ||
| 243 | </entry> | ||
| 244 | </row><row><entry | ||
| 245 | align="char"> | ||
| 246 | <para>uint32_t *ber</para> | ||
| 247 | </entry><entry | ||
| 248 | align="char"> | ||
| 249 | <para>The bit error rate is stored into *ber.</para> | ||
| 250 | </entry> | ||
| 251 | </row></tbody></tgroup></informaltable> | ||
| 252 | |||
| 253 | &return-value-dvb; | ||
| 254 | </section> | ||
| 255 | |||
| 256 | <section id="FE_READ_SNR"> | ||
| 257 | <title>FE_READ_SNR</title> | ||
| 258 | |||
| 259 | <para>DESCRIPTION | ||
| 260 | </para> | ||
| 261 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 262 | align="char"> | ||
| 263 | <para>This ioctl call returns the signal-to-noise ratio for the signal currently received | ||
| 264 | by the front-end. For this command, read-only access to the device is sufficient.</para> | ||
| 265 | </entry> | ||
| 266 | </row></tbody></tgroup></informaltable> | ||
| 267 | <para>SYNOPSIS | ||
| 268 | </para> | ||
| 269 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 270 | align="char"> | ||
| 271 | <para>int ioctl(int fd, int request = <link linkend="FE_READ_SNR">FE_READ_SNR</link>, uint16_t | ||
| 272 | ⋆snr);</para> | ||
| 273 | </entry> | ||
| 274 | </row></tbody></tgroup></informaltable> | ||
| 275 | <para>PARAMETERS | ||
| 276 | </para> | ||
| 277 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 278 | align="char"> | ||
| 279 | <para>int fd</para> | ||
| 280 | </entry><entry | ||
| 281 | align="char"> | ||
| 282 | <para>File descriptor returned by a previous call to open().</para> | ||
| 283 | </entry> | ||
| 284 | </row><row><entry | ||
| 285 | align="char"> | ||
| 286 | <para>int request</para> | ||
| 287 | </entry><entry | ||
| 288 | align="char"> | ||
| 289 | <para>Equals <link linkend="FE_READ_SNR">FE_READ_SNR</link> for this command.</para> | ||
| 290 | </entry> | ||
| 291 | </row><row><entry | ||
| 292 | align="char"> | ||
| 293 | <para>uint16_t *snr</para> | ||
| 294 | </entry><entry | ||
| 295 | align="char"> | ||
| 296 | <para>The signal-to-noise ratio is stored into *snr.</para> | ||
| 297 | </entry> | ||
| 298 | </row></tbody></tgroup></informaltable> | ||
| 299 | |||
| 300 | &return-value-dvb; | ||
| 301 | </section> | ||
| 302 | |||
| 303 | <section id="FE_READ_SIGNAL_STRENGTH"> | ||
| 304 | <title>FE_READ_SIGNAL_STRENGTH</title> | ||
| 305 | <para>DESCRIPTION | ||
| 306 | </para> | ||
| 307 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 308 | align="char"> | ||
| 309 | <para>This ioctl call returns the signal strength value for the signal currently received | ||
| 310 | by the front-end. For this command, read-only access to the device is sufficient.</para> | ||
| 311 | </entry> | ||
| 312 | </row></tbody></tgroup></informaltable> | ||
| 313 | <para>SYNOPSIS | ||
| 314 | </para> | ||
| 315 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 316 | align="char"> | ||
| 317 | <para>int ioctl( int fd, int request = | ||
| 318 | <link linkend="FE_READ_SIGNAL_STRENGTH">FE_READ_SIGNAL_STRENGTH</link>, uint16_t ⋆strength);</para> | ||
| 319 | </entry> | ||
| 320 | </row></tbody></tgroup></informaltable> | ||
| 321 | |||
| 322 | <para>PARAMETERS | ||
| 323 | </para> | ||
| 324 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 325 | align="char"> | ||
| 326 | <para>int fd</para> | ||
| 327 | </entry><entry | ||
| 328 | align="char"> | ||
| 329 | <para>File descriptor returned by a previous call to open().</para> | ||
| 330 | </entry> | ||
| 331 | </row><row><entry | ||
| 332 | align="char"> | ||
| 333 | <para>int request</para> | ||
| 334 | </entry><entry | ||
| 335 | align="char"> | ||
| 336 | <para>Equals <link linkend="FE_READ_SIGNAL_STRENGTH">FE_READ_SIGNAL_STRENGTH</link> for this | ||
| 337 | command.</para> | ||
| 338 | </entry> | ||
| 339 | </row><row><entry | ||
| 340 | align="char"> | ||
| 341 | <para>uint16_t *strength</para> | ||
| 342 | </entry><entry | ||
| 343 | align="char"> | ||
| 344 | <para>The signal strength value is stored into *strength.</para> | ||
| 345 | </entry> | ||
| 346 | </row></tbody></tgroup></informaltable> | ||
| 347 | |||
| 348 | &return-value-dvb; | ||
| 349 | </section> | ||
| 350 | |||
| 351 | <section id="FE_READ_UNCORRECTED_BLOCKS"> | ||
| 352 | <title>FE_READ_UNCORRECTED_BLOCKS</title> | ||
| 353 | <para>DESCRIPTION | ||
| 354 | </para> | ||
| 355 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 356 | align="char"> | ||
| 357 | <para>This ioctl call returns the number of uncorrected blocks detected by the device | ||
| 358 | driver during its lifetime. For meaningful measurements, the increment in block | ||
| 359 | count during a specific time interval should be calculated. For this command, | ||
| 360 | read-only access to the device is sufficient.</para> | ||
| 361 | </entry> | ||
| 362 | </row><row><entry | ||
| 363 | align="char"> | ||
| 364 | <para>Note that the counter will wrap to zero after its maximum count has been | ||
| 365 | reached.</para> | ||
| 366 | </entry> | ||
| 367 | </row></tbody></tgroup></informaltable> | ||
| 368 | <para>SYNOPSIS | ||
| 369 | </para> | ||
| 370 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 371 | align="char"> | ||
| 372 | <para>int ioctl( int fd, int request = | ||
| 373 | <link linkend="FE_READ_UNCORRECTED_BLOCKS">FE_READ_UNCORRECTED_BLOCKS</link>, uint32_t ⋆ublocks);</para> | ||
| 374 | </entry> | ||
| 375 | </row></tbody></tgroup></informaltable> | ||
| 376 | <para>PARAMETERS | ||
| 377 | </para> | ||
| 378 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 379 | align="char"> | ||
| 380 | <para>int fd</para> | ||
| 381 | </entry><entry | ||
| 382 | align="char"> | ||
| 383 | <para>File descriptor returned by a previous call to open().</para> | ||
| 384 | </entry> | ||
| 385 | </row><row><entry | ||
| 386 | align="char"> | ||
| 387 | <para>int request</para> | ||
| 388 | </entry><entry | ||
| 389 | align="char"> | ||
| 390 | <para>Equals <link linkend="FE_READ_UNCORRECTED_BLOCKS">FE_READ_UNCORRECTED_BLOCKS</link> for this | ||
| 391 | command.</para> | ||
| 392 | </entry> | ||
| 393 | </row><row><entry | ||
| 394 | align="char"> | ||
| 395 | <para>uint32_t *ublocks</para> | ||
| 396 | </entry><entry | ||
| 397 | align="char"> | ||
| 398 | <para>The total number of uncorrected blocks seen by the driver | ||
| 399 | so far.</para> | ||
| 400 | </entry> | ||
| 401 | </row></tbody></tgroup></informaltable> | ||
| 402 | |||
| 403 | &return-value-dvb; | ||
| 404 | </section> | ||
| 405 | |||
| 406 | <section id="FE_SET_FRONTEND"> | ||
| 407 | <title>FE_SET_FRONTEND</title> | ||
| 408 | <para>DESCRIPTION | ||
| 409 | </para> | ||
| 410 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 411 | align="char"> | ||
| 412 | <para>This ioctl call starts a tuning operation using specified parameters. The result | ||
| 413 | of this call will be successful if the parameters were valid and the tuning could | ||
| 414 | be initiated. The result of the tuning operation in itself, however, will arrive | ||
| 415 | asynchronously as an event (see documentation for <link linkend="FE_GET_EVENT">FE_GET_EVENT</link> and | ||
| 416 | FrontendEvent.) If a new <link linkend="FE_SET_FRONTEND">FE_SET_FRONTEND</link> operation is initiated before | ||
| 417 | the previous one was completed, the previous operation will be aborted in favor | ||
| 418 | of the new one. This command requires read/write access to the device.</para> | ||
| 419 | </entry> | ||
| 420 | </row></tbody></tgroup></informaltable> | ||
| 421 | |||
| 422 | <para>SYNOPSIS | ||
| 423 | </para> | ||
| 424 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 425 | align="char"> | ||
| 426 | <para>int ioctl(int fd, int request = <link linkend="FE_SET_FRONTEND">FE_SET_FRONTEND</link>, | ||
| 427 | struct dvb_frontend_parameters ⋆p);</para> | ||
| 428 | </entry> | ||
| 429 | </row></tbody></tgroup></informaltable> | ||
| 430 | <para>PARAMETERS | ||
| 431 | </para> | ||
| 432 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 433 | align="char"> | ||
| 434 | <para>int fd</para> | ||
| 435 | </entry><entry | ||
| 436 | align="char"> | ||
| 437 | <para>File descriptor returned by a previous call to open().</para> | ||
| 438 | </entry> | ||
| 439 | </row><row><entry | ||
| 440 | align="char"> | ||
| 441 | <para>int request</para> | ||
| 442 | </entry><entry | ||
| 443 | align="char"> | ||
| 444 | <para>Equals <link linkend="FE_SET_FRONTEND">FE_SET_FRONTEND</link> for this command.</para> | ||
| 445 | </entry> | ||
| 446 | </row><row><entry | ||
| 447 | align="char"> | ||
| 448 | <para>struct | ||
| 449 | dvb_frontend_parameters | ||
| 450 | *p</para> | ||
| 451 | </entry><entry | ||
| 452 | align="char"> | ||
| 453 | <para>Points to parameters for tuning operation.</para> | ||
| 454 | </entry> | ||
| 455 | </row></tbody></tgroup></informaltable> | ||
| 456 | |||
| 457 | &return-value-dvb; | ||
| 458 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 459 | align="char"> | ||
| 460 | <para>EINVAL</para> | ||
| 461 | </entry><entry | ||
| 462 | align="char"> | ||
| 463 | <para>Maximum supported symbol rate reached.</para> | ||
| 464 | </entry> | ||
| 465 | </row></tbody></tgroup></informaltable> | ||
| 466 | </section> | ||
| 467 | |||
| 468 | <section id="FE_GET_FRONTEND"> | ||
| 469 | <title>FE_GET_FRONTEND</title> | ||
| 470 | <para>DESCRIPTION | ||
| 471 | </para> | ||
| 472 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 473 | align="char"> | ||
| 474 | <para>This ioctl call queries the currently effective frontend parameters. For this | ||
| 475 | command, read-only access to the device is sufficient.</para> | ||
| 476 | </entry> | ||
| 477 | </row></tbody></tgroup></informaltable> | ||
| 478 | |||
| 479 | <para>SYNOPSIS | ||
| 480 | </para> | ||
| 481 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 482 | align="char"> | ||
| 483 | <para>int ioctl(int fd, int request = <link linkend="FE_GET_FRONTEND">FE_GET_FRONTEND</link>, | ||
| 484 | struct dvb_frontend_parameters ⋆p);</para> | ||
| 485 | </entry> | ||
| 486 | </row></tbody></tgroup></informaltable> | ||
| 487 | |||
| 488 | <para>PARAMETERS | ||
| 489 | </para> | ||
| 490 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 491 | align="char"> | ||
| 492 | <para>int fd</para> | ||
| 493 | </entry><entry | ||
| 494 | align="char"> | ||
| 495 | <para>File descriptor returned by a previous call to open().</para> | ||
| 496 | </entry> | ||
| 497 | </row><row><entry | ||
| 498 | align="char"> | ||
| 499 | <para>int request</para> | ||
| 500 | </entry><entry | ||
| 501 | align="char"> | ||
| 502 | <para>Equals <link linkend="FE_SET_FRONTEND">FE_SET_FRONTEND</link> for this command.</para> | ||
| 503 | </entry> | ||
| 504 | </row><row><entry | ||
| 505 | align="char"> | ||
| 506 | <para>struct | ||
| 507 | dvb_frontend_parameters | ||
| 508 | *p</para> | ||
| 509 | </entry><entry | ||
| 510 | align="char"> | ||
| 511 | <para>Points to parameters for tuning operation.</para> | ||
| 512 | </entry> | ||
| 513 | </row></tbody></tgroup></informaltable> | ||
| 514 | |||
| 515 | &return-value-dvb; | ||
| 516 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 517 | align="char"> | ||
| 518 | <para>EINVAL</para> | ||
| 519 | </entry><entry | ||
| 520 | align="char"> | ||
| 521 | <para>Maximum supported symbol rate reached.</para> | ||
| 522 | </entry> | ||
| 523 | </row></tbody></tgroup></informaltable> | ||
| 524 | |||
| 525 | </section> | ||
| 526 | |||
| 527 | <section id="FE_GET_EVENT"> | ||
| 528 | <title>FE_GET_EVENT</title> | ||
| 529 | <para>DESCRIPTION | ||
| 530 | </para> | ||
| 531 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 532 | align="char"> | ||
| 533 | <para>This ioctl call returns a frontend event if available. If an event is not | ||
| 534 | available, the behavior depends on whether the device is in blocking or | ||
| 535 | non-blocking mode. In the latter case, the call fails immediately with errno | ||
| 536 | set to EWOULDBLOCK. In the former case, the call blocks until an event | ||
| 537 | becomes available.</para> | ||
| 538 | </entry> | ||
| 539 | </row><row><entry | ||
| 540 | align="char"> | ||
| 541 | <para>The standard Linux poll() and/or select() system calls can be used with the | ||
| 542 | device file descriptor to watch for new events. For select(), the file descriptor | ||
| 543 | should be included in the exceptfds argument, and for poll(), POLLPRI should | ||
| 544 | be specified as the wake-up condition. Since the event queue allocated is | ||
| 545 | rather small (room for 8 events), the queue must be serviced regularly to avoid | ||
| 546 | overflow. If an overflow happens, the oldest event is discarded from the queue, | ||
| 547 | and an error (EOVERFLOW) occurs the next time the queue is read. After | ||
| 548 | reporting the error condition in this fashion, subsequent | ||
| 549 | <link linkend="FE_GET_EVENT">FE_GET_EVENT</link> | ||
| 550 | calls will return events from the queue as usual.</para> | ||
| 551 | </entry> | ||
| 552 | </row><row><entry | ||
| 553 | align="char"> | ||
| 554 | <para>For the sake of implementation simplicity, this command requires read/write | ||
| 555 | access to the device.</para> | ||
| 556 | </entry> | ||
| 557 | </row></tbody></tgroup></informaltable> | ||
| 558 | |||
| 559 | <para>SYNOPSIS | ||
| 560 | </para> | ||
| 561 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 562 | align="char"> | ||
| 563 | <para>int ioctl(int fd, int request = QPSK_GET_EVENT, | ||
| 564 | struct dvb_frontend_event ⋆ev);</para> | ||
| 565 | </entry> | ||
| 566 | </row></tbody></tgroup></informaltable> | ||
| 567 | |||
| 568 | <para>PARAMETERS | ||
| 569 | </para> | ||
| 570 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 571 | align="char"> | ||
| 572 | <para>int fd</para> | ||
| 573 | </entry><entry | ||
| 574 | align="char"> | ||
| 575 | <para>File descriptor returned by a previous call to open().</para> | ||
| 576 | </entry> | ||
| 577 | </row><row><entry | ||
| 578 | align="char"> | ||
| 579 | <para>int request</para> | ||
| 580 | </entry><entry | ||
| 581 | align="char"> | ||
| 582 | <para>Equals <link linkend="FE_GET_EVENT">FE_GET_EVENT</link> for this command.</para> | ||
| 583 | </entry> | ||
| 584 | </row><row><entry | ||
| 585 | align="char"> | ||
| 586 | <para>struct | ||
| 587 | dvb_frontend_event | ||
| 588 | *ev</para> | ||
| 589 | </entry><entry | ||
| 590 | align="char"> | ||
| 591 | <para>Points to the location where the event,</para> | ||
| 592 | </entry> | ||
| 593 | </row><row><entry | ||
| 594 | align="char"> | ||
| 595 | </entry><entry | ||
| 596 | align="char"> | ||
| 597 | <para>if any, is to be stored.</para> | ||
| 598 | </entry> | ||
| 599 | </row></tbody></tgroup></informaltable> | ||
| 600 | |||
| 601 | &return-value-dvb; | ||
| 602 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 603 | align="char"> | ||
| 604 | <para>EWOULDBLOCK</para> | ||
| 605 | </entry><entry | ||
| 606 | align="char"> | ||
| 607 | <para>There is no event pending, and the device is in | ||
| 608 | non-blocking mode.</para> | ||
| 609 | </entry> | ||
| 610 | </row><row><entry | ||
| 611 | align="char"> | ||
| 612 | <para>EOVERFLOW</para> | ||
| 613 | </entry><entry | ||
| 614 | align="char"> | ||
| 615 | <para>Overflow in event queue - one or more events were lost.</para> | ||
| 616 | </entry> | ||
| 617 | </row></tbody></tgroup></informaltable> | ||
| 618 | </section> | ||
| 619 | |||
| 620 | <section id="FE_DISHNETWORK_SEND_LEGACY_CMD"> | ||
| 621 | <title>FE_DISHNETWORK_SEND_LEGACY_CMD</title> | ||
| 622 | <para>DESCRIPTION</para> | ||
| 623 | <informaltable><tgroup cols="1"><tbody><row> | ||
| 624 | <entry align="char"> | ||
| 625 | <para>WARNING: This is a very obscure legacy command, used only at stv0299 driver. Should not be used on newer drivers.</para> | ||
| 626 | <para>It provides a non-standard method for selecting Diseqc voltage on the frontend, for Dish Network legacy switches.</para> | ||
| 627 | <para>As support for this ioctl were added in 2004, this means that such dishes were already legacy in 2004.</para> | ||
| 628 | </entry> | ||
| 629 | </row></tbody></tgroup></informaltable> | ||
| 630 | |||
| 631 | <para>SYNOPSIS</para> | ||
| 632 | <informaltable><tgroup cols="1"><tbody><row> | ||
| 633 | <entry align="char"> | ||
| 634 | <para>int ioctl(int fd, int request = | ||
| 635 | <link linkend="FE_DISHNETWORK_SEND_LEGACY_CMD">FE_DISHNETWORK_SEND_LEGACY_CMD</link>, unsigned long cmd);</para> | ||
| 636 | </entry> | ||
| 637 | </row></tbody></tgroup></informaltable> | ||
| 638 | |||
| 639 | <para>PARAMETERS</para> | ||
| 640 | <informaltable><tgroup cols="2"><tbody><row> | ||
| 641 | <entry align="char"> | ||
| 642 | <para>unsigned long cmd</para> | ||
| 643 | </entry> | ||
| 644 | <entry align="char"> | ||
| 645 | <para> | ||
| 646 | sends the specified raw cmd to the dish via DISEqC. | ||
| 647 | </para> | ||
| 648 | </entry> | ||
| 649 | </row></tbody></tgroup></informaltable> | ||
| 650 | |||
| 651 | &return-value-dvb; | ||
| 652 | </section> | ||
| 653 | |||
| 654 | </section> | ||
| @@ -1,211 +0,0 @@ | |||
| 1 | <title>Introduction</title> | ||
| 2 | |||
| 3 | <section id="requisites"> | ||
| 4 | <title>What you need to know</title> | ||
| 5 | |||
| 6 | <para>The reader of this document is required to have some knowledge in | ||
| 7 | the area of digital video broadcasting (DVB) and should be familiar with | ||
| 8 | part I of the MPEG2 specification ISO/IEC 13818 (aka ITU-T H.222), i.e | ||
| 9 | you should know what a program/transport stream (PS/TS) is and what is | ||
| 10 | meant by a packetized elementary stream (PES) or an I-frame.</para> | ||
| 11 | |||
| 12 | <para>Various DVB standards documents are available from | ||
| 13 | <ulink url="http://www.dvb.org" /> and/or | ||
| 14 | <ulink url="http://www.etsi.org" />.</para> | ||
| 15 | |||
| 16 | <para>It is also necessary to know how to access unix/linux devices and | ||
| 17 | how to use ioctl calls. This also includes the knowledge of C or C++. | ||
| 18 | </para> | ||
| 19 | </section> | ||
| 20 | |||
| 21 | <section id="history"> | ||
| 22 | <title>History</title> | ||
| 23 | |||
| 24 | <para>The first API for DVB cards we used at Convergence in late 1999 | ||
| 25 | was an extension of the Video4Linux API which was primarily developed | ||
| 26 | for frame grabber cards. As such it was not really well suited to be | ||
| 27 | used for DVB cards and their new features like recording MPEG streams | ||
| 28 | and filtering several section and PES data streams at the same time. | ||
| 29 | </para> | ||
| 30 | |||
| 31 | <para>In early 2000, we were approached by Nokia with a proposal for a | ||
| 32 | new standard Linux DVB API. As a commitment to the development of | ||
| 33 | terminals based on open standards, Nokia and Convergence made it | ||
| 34 | available to all Linux developers and published it on | ||
| 35 | <ulink url="https://linuxtv.org" /> in September 2000. | ||
| 36 | Convergence is the maintainer of the Linux DVB API. Together with the | ||
| 37 | LinuxTV community (i.e. you, the reader of this document), the Linux DVB | ||
| 38 | API will be constantly reviewed and improved. With the Linux driver for | ||
| 39 | the Siemens/Hauppauge DVB PCI card Convergence provides a first | ||
| 40 | implementation of the Linux DVB API.</para> | ||
| 41 | </section> | ||
| 42 | |||
| 43 | <section id="overview"> | ||
| 44 | <title>Overview</title> | ||
| 45 | |||
| 46 | <figure id="stb_components"> | ||
| 47 | <title>Components of a DVB card/STB</title> | ||
| 48 | <mediaobject> | ||
| 49 | <imageobject> | ||
| 50 | <imagedata fileref="dvbstb.pdf" format="PS" /> | ||
| 51 | </imageobject> | ||
| 52 | <imageobject> | ||
| 53 | <imagedata fileref="dvbstb.png" format="PNG" /> | ||
| 54 | </imageobject> | ||
| 55 | </mediaobject> | ||
| 56 | </figure> | ||
| 57 | |||
| 58 | <para>A DVB PCI card or DVB set-top-box (STB) usually consists of the | ||
| 59 | following main hardware components: </para> | ||
| 60 | |||
| 61 | <itemizedlist> | ||
| 62 | <listitem> | ||
| 63 | |||
| 64 | <para>Frontend consisting of tuner and DVB demodulator</para> | ||
| 65 | |||
| 66 | <para>Here the raw signal reaches the DVB hardware from a satellite dish | ||
| 67 | or antenna or directly from cable. The frontend down-converts and | ||
| 68 | demodulates this signal into an MPEG transport stream (TS). In case of a | ||
| 69 | satellite frontend, this includes a facility for satellite equipment | ||
| 70 | control (SEC), which allows control of LNB polarization, multi feed | ||
| 71 | switches or dish rotors.</para> | ||
| 72 | |||
| 73 | </listitem> | ||
| 74 | <listitem> | ||
| 75 | |||
| 76 | <para>Conditional Access (CA) hardware like CI adapters and smartcard slots | ||
| 77 | </para> | ||
| 78 | |||
| 79 | <para>The complete TS is passed through the CA hardware. Programs to | ||
| 80 | which the user has access (controlled by the smart card) are decoded in | ||
| 81 | real time and re-inserted into the TS.</para> | ||
| 82 | |||
| 83 | </listitem> | ||
| 84 | <listitem> | ||
| 85 | <para>Demultiplexer which filters the incoming DVB stream</para> | ||
| 86 | |||
| 87 | <para>The demultiplexer splits the TS into its components like audio and | ||
| 88 | video streams. Besides usually several of such audio and video streams | ||
| 89 | it also contains data streams with information about the programs | ||
| 90 | offered in this or other streams of the same provider.</para> | ||
| 91 | |||
| 92 | </listitem> | ||
| 93 | <listitem> | ||
| 94 | |||
| 95 | <para>MPEG2 audio and video decoder</para> | ||
| 96 | |||
| 97 | <para>The main targets of the demultiplexer are the MPEG2 audio and | ||
| 98 | video decoders. After decoding they pass on the uncompressed audio and | ||
| 99 | video to the computer screen or (through a PAL/NTSC encoder) to a TV | ||
| 100 | set.</para> | ||
| 101 | |||
| 102 | |||
| 103 | </listitem> | ||
| 104 | </itemizedlist> | ||
| 105 | |||
| 106 | <para><xref linkend="stb_components" /> shows a crude schematic of the control and data flow | ||
| 107 | between those components.</para> | ||
| 108 | |||
| 109 | <para>On a DVB PCI card not all of these have to be present since some | ||
| 110 | functionality can be provided by the main CPU of the PC (e.g. MPEG | ||
| 111 | picture and sound decoding) or is not needed (e.g. for data-only uses | ||
| 112 | like “internet over satellite”). Also not every card or STB | ||
| 113 | provides conditional access hardware.</para> | ||
| 114 | |||
| 115 | </section> | ||
| 116 | |||
| 117 | <section id="dvb_devices"> | ||
| 118 | <title>Linux DVB Devices</title> | ||
| 119 | |||
| 120 | <para>The Linux DVB API lets you control these hardware components | ||
| 121 | through currently six Unix-style character devices for video, audio, | ||
| 122 | frontend, demux, CA and IP-over-DVB networking. The video and audio | ||
| 123 | devices control the MPEG2 decoder hardware, the frontend device the | ||
| 124 | tuner and the DVB demodulator. The demux device gives you control over | ||
| 125 | the PES and section filters of the hardware. If the hardware does not | ||
| 126 | support filtering these filters can be implemented in software. Finally, | ||
| 127 | the CA device controls all the conditional access capabilities of the | ||
| 128 | hardware. It can depend on the individual security requirements of the | ||
| 129 | platform, if and how many of the CA functions are made available to the | ||
| 130 | application through this device.</para> | ||
| 131 | |||
| 132 | <para>All devices can be found in the <constant>/dev</constant> | ||
| 133 | tree under <constant>/dev/dvb</constant>. The individual devices | ||
| 134 | are called:</para> | ||
| 135 | |||
| 136 | <itemizedlist> | ||
| 137 | <listitem> | ||
| 138 | |||
| 139 | <para><constant>/dev/dvb/adapterN/audioM</constant>,</para> | ||
| 140 | </listitem> | ||
| 141 | <listitem> | ||
| 142 | <para><constant>/dev/dvb/adapterN/videoM</constant>,</para> | ||
| 143 | </listitem> | ||
| 144 | <listitem> | ||
| 145 | <para><constant>/dev/dvb/adapterN/frontendM</constant>,</para> | ||
| 146 | </listitem> | ||
| 147 | <listitem> | ||
| 148 | |||
| 149 | <para><constant>/dev/dvb/adapterN/netM</constant>,</para> | ||
| 150 | </listitem> | ||
| 151 | <listitem> | ||
| 152 | |||
| 153 | <para><constant>/dev/dvb/adapterN/demuxM</constant>,</para> | ||
| 154 | </listitem> | ||
| 155 | <listitem> | ||
| 156 | |||
| 157 | <para><constant>/dev/dvb/adapterN/dvrM</constant>,</para> | ||
| 158 | </listitem> | ||
| 159 | <listitem> | ||
| 160 | |||
| 161 | <para><constant>/dev/dvb/adapterN/caM</constant>,</para></listitem></itemizedlist> | ||
| 162 | |||
| 163 | <para>where N enumerates the DVB PCI cards in a system starting | ||
| 164 | from 0, and M enumerates the devices of each type within each | ||
| 165 | adapter, starting from 0, too. We will omit the “ | ||
| 166 | <constant>/dev/dvb/adapterN/</constant>” in the further discussion | ||
| 167 | of these devices.</para> | ||
| 168 | |||
| 169 | <para>More details about the data structures and function calls of all | ||
| 170 | the devices are described in the following chapters.</para> | ||
| 171 | |||
| 172 | </section> | ||
| 173 | |||
| 174 | <section id="include_files"> | ||
| 175 | <title>API include files</title> | ||
| 176 | |||
| 177 | <para>For each of the DVB devices a corresponding include file exists. | ||
| 178 | The DVB API include files should be included in application sources with | ||
| 179 | a partial path like:</para> | ||
| 180 | |||
| 181 | <programlisting> | ||
| 182 | #include <linux/dvb/audio.h> | ||
| 183 | </programlisting> | ||
| 184 | <programlisting> | ||
| 185 | #include <linux/dvb/ca.h> | ||
| 186 | </programlisting> | ||
| 187 | <programlisting> | ||
| 188 | #include <linux/dvb/dmx.h> | ||
| 189 | </programlisting> | ||
| 190 | <programlisting> | ||
| 191 | #include <linux/dvb/frontend.h> | ||
| 192 | </programlisting> | ||
| 193 | <programlisting> | ||
| 194 | #include <linux/dvb/net.h> | ||
| 195 | </programlisting> | ||
| 196 | <programlisting> | ||
| 197 | #include <linux/dvb/osd.h> | ||
| 198 | </programlisting> | ||
| 199 | <programlisting> | ||
| 200 | #include <linux/dvb/video.h> | ||
| 201 | </programlisting> | ||
| 202 | |||
| 203 | <para>To enable applications to support different API version, an | ||
| 204 | additional include file | ||
| 205 | <constant>linux/dvb/version.h</constant> exists, which defines the | ||
| 206 | constant <constant>DVB_API_VERSION</constant>. This document | ||
| 207 | describes <constant>DVB_API_VERSION 5.10</constant>. | ||
| 208 | </para> | ||
| 209 | |||
| 210 | </section> | ||
| 211 | |||
| @@ -1,238 +0,0 @@ | |||
| 1 | <title>DVB Network API</title> | ||
| 2 | <para>The DVB net device controls the mapping of data packages that are | ||
| 3 | part of a transport stream to be mapped into a virtual network interface, | ||
| 4 | visible through the standard Linux network protocol stack.</para> | ||
| 5 | <para>Currently, two encapsulations are supported:</para> | ||
| 6 | <itemizedlist> | ||
| 7 | <listitem><para><ulink url="http://en.wikipedia.org/wiki/Multiprotocol_Encapsulation"> | ||
| 8 | Multi Protocol Encapsulation (MPE)</ulink></para></listitem> | ||
| 9 | <listitem><para><ulink url="http://en.wikipedia.org/wiki/Unidirectional_Lightweight_Encapsulation"> | ||
| 10 | Ultra Lightweight Encapsulation (ULE)</ulink></para></listitem> | ||
| 11 | </itemizedlist> | ||
| 12 | |||
| 13 | <para>In order to create the Linux virtual network interfaces, an application | ||
| 14 | needs to tell to the Kernel what are the PIDs and the encapsulation types | ||
| 15 | that are present on the transport stream. This is done through | ||
| 16 | <constant>/dev/dvb/adapter?/net?</constant> device node. | ||
| 17 | The data will be available via virtual <constant>dvb?_?</constant> | ||
| 18 | network interfaces, and will be controlled/routed via the standard | ||
| 19 | ip tools (like ip, route, netstat, ifconfig, etc).</para> | ||
| 20 | <para> Data types and and ioctl definitions are defined via | ||
| 21 | <constant>linux/dvb/net.h</constant> header.</para> | ||
| 22 | |||
| 23 | <section id="net_fcalls"> | ||
| 24 | <title>DVB net Function Calls</title> | ||
| 25 | |||
| 26 | |||
| 27 | <refentry id="NET_ADD_IF"> | ||
| 28 | <refmeta> | ||
| 29 | <refentrytitle>ioctl NET_ADD_IF</refentrytitle> | ||
| 30 | &manvol; | ||
| 31 | </refmeta> | ||
| 32 | |||
| 33 | <refnamediv> | ||
| 34 | <refname>NET_ADD_IF</refname> | ||
| 35 | <refpurpose>Creates a new network interface for a given Packet ID.</refpurpose> | ||
| 36 | </refnamediv> | ||
| 37 | |||
| 38 | <refsynopsisdiv> | ||
| 39 | <funcsynopsis> | ||
| 40 | <funcprototype> | ||
| 41 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 42 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 43 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 44 | <paramdef>struct dvb_net_if *<parameter>net_if</parameter></paramdef> | ||
| 45 | </funcprototype> | ||
| 46 | </funcsynopsis> | ||
| 47 | </refsynopsisdiv> | ||
| 48 | |||
| 49 | <refsect1> | ||
| 50 | <title>Arguments</title> | ||
| 51 | <variablelist> | ||
| 52 | <varlistentry> | ||
| 53 | <term><parameter>fd</parameter></term> | ||
| 54 | <listitem> | ||
| 55 | <para>&fe_fd;</para> | ||
| 56 | </listitem> | ||
| 57 | </varlistentry> | ||
| 58 | <varlistentry> | ||
| 59 | <term><parameter>request</parameter></term> | ||
| 60 | <listitem> | ||
| 61 | <para>FE_SET_TONE</para> | ||
| 62 | </listitem> | ||
| 63 | </varlistentry> | ||
| 64 | <varlistentry> | ||
| 65 | <term><parameter>net_if</parameter></term> | ||
| 66 | <listitem> | ||
| 67 | <para>pointer to &dvb-net-if;</para> | ||
| 68 | </listitem> | ||
| 69 | </varlistentry> | ||
| 70 | </variablelist> | ||
| 71 | </refsect1> | ||
| 72 | |||
| 73 | <refsect1> | ||
| 74 | <title>Description</title> | ||
| 75 | |||
| 76 | <para>The NET_ADD_IF ioctl system call selects the Packet ID (PID) that | ||
| 77 | contains a TCP/IP traffic, the type of encapsulation to be used (MPE or ULE) | ||
| 78 | and the interface number for the new interface to be created. When the | ||
| 79 | system call successfully returns, a new virtual network interface is created.</para> | ||
| 80 | <para>The &dvb-net-if;::ifnum field will be filled with the number of the | ||
| 81 | created interface.</para> | ||
| 82 | |||
| 83 | &return-value-dvb; | ||
| 84 | </refsect1> | ||
| 85 | |||
| 86 | <refsect1 id="dvb-net-if-t"> | ||
| 87 | <title>struct <structname>dvb_net_if</structname> description</title> | ||
| 88 | |||
| 89 | <table pgwide="1" frame="none" id="dvb-net-if"> | ||
| 90 | <title>struct <structname>dvb_net_if</structname></title> | ||
| 91 | <tgroup cols="2"> | ||
| 92 | &cs-def; | ||
| 93 | <thead> | ||
| 94 | <row> | ||
| 95 | <entry>ID</entry> | ||
| 96 | <entry>Description</entry> | ||
| 97 | </row> | ||
| 98 | </thead> | ||
| 99 | <tbody valign="top"> | ||
| 100 | <row> | ||
| 101 | <entry align="char">pid</entry> | ||
| 102 | <entry align="char">Packet ID (PID) of the MPEG-TS that contains | ||
| 103 | data</entry> | ||
| 104 | </row><row> | ||
| 105 | <entry align="char">ifnum</entry> | ||
| 106 | <entry align="char">number of the DVB interface.</entry> | ||
| 107 | </row><row> | ||
| 108 | <entry align="char">feedtype</entry> | ||
| 109 | <entry align="char">Encapsulation type of the feed. It can be: | ||
| 110 | <constant>DVB_NET_FEEDTYPE_MPE</constant> for MPE encoding | ||
| 111 | or | ||
| 112 | <constant>DVB_NET_FEEDTYPE_ULE</constant> for ULE encoding. | ||
| 113 | </entry> | ||
| 114 | </row> | ||
| 115 | </tbody> | ||
| 116 | </tgroup> | ||
| 117 | </table> | ||
| 118 | </refsect1> | ||
| 119 | </refentry> | ||
| 120 | |||
| 121 | <refentry id="NET_REMOVE_IF"> | ||
| 122 | <refmeta> | ||
| 123 | <refentrytitle>ioctl NET_REMOVE_IF</refentrytitle> | ||
| 124 | &manvol; | ||
| 125 | </refmeta> | ||
| 126 | |||
| 127 | <refnamediv> | ||
| 128 | <refname>NET_REMOVE_IF</refname> | ||
| 129 | <refpurpose>Removes a network interface.</refpurpose> | ||
| 130 | </refnamediv> | ||
| 131 | |||
| 132 | <refsynopsisdiv> | ||
| 133 | <funcsynopsis> | ||
| 134 | <funcprototype> | ||
| 135 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 136 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 137 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 138 | <paramdef>int <parameter>ifnum</parameter></paramdef> | ||
| 139 | </funcprototype> | ||
| 140 | </funcsynopsis> | ||
| 141 | </refsynopsisdiv> | ||
| 142 | |||
| 143 | <refsect1> | ||
| 144 | <title>Arguments</title> | ||
| 145 | <variablelist> | ||
| 146 | <varlistentry> | ||
| 147 | <term><parameter>fd</parameter></term> | ||
| 148 | <listitem> | ||
| 149 | <para>&fe_fd;</para> | ||
| 150 | </listitem> | ||
| 151 | </varlistentry> | ||
| 152 | <varlistentry> | ||
| 153 | <term><parameter>request</parameter></term> | ||
| 154 | <listitem> | ||
| 155 | <para>FE_SET_TONE</para> | ||
| 156 | </listitem> | ||
| 157 | </varlistentry> | ||
| 158 | <varlistentry> | ||
| 159 | <term><parameter>net_if</parameter></term> | ||
| 160 | <listitem> | ||
| 161 | <para>number of the interface to be removed</para> | ||
| 162 | </listitem> | ||
| 163 | </varlistentry> | ||
| 164 | </variablelist> | ||
| 165 | </refsect1> | ||
| 166 | |||
| 167 | <refsect1> | ||
| 168 | <title>Description</title> | ||
| 169 | |||
| 170 | <para>The NET_REMOVE_IF ioctl deletes an interface previously created | ||
| 171 | via &NET-ADD-IF;.</para> | ||
| 172 | |||
| 173 | &return-value-dvb; | ||
| 174 | </refsect1> | ||
| 175 | </refentry> | ||
| 176 | |||
| 177 | |||
| 178 | <refentry id="NET_GET_IF"> | ||
| 179 | <refmeta> | ||
| 180 | <refentrytitle>ioctl NET_GET_IF</refentrytitle> | ||
| 181 | &manvol; | ||
| 182 | </refmeta> | ||
| 183 | |||
| 184 | <refnamediv> | ||
| 185 | <refname>NET_GET_IF</refname> | ||
| 186 | <refpurpose>Read the configuration data of an interface created via | ||
| 187 | &NET-ADD-IF;.</refpurpose> | ||
| 188 | </refnamediv> | ||
| 189 | |||
| 190 | <refsynopsisdiv> | ||
| 191 | <funcsynopsis> | ||
| 192 | <funcprototype> | ||
| 193 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 194 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 195 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 196 | <paramdef>struct dvb_net_if *<parameter>net_if</parameter></paramdef> | ||
| 197 | </funcprototype> | ||
| 198 | </funcsynopsis> | ||
| 199 | </refsynopsisdiv> | ||
| 200 | |||
| 201 | <refsect1> | ||
| 202 | <title>Arguments</title> | ||
| 203 | <variablelist> | ||
| 204 | <varlistentry> | ||
| 205 | <term><parameter>fd</parameter></term> | ||
| 206 | <listitem> | ||
| 207 | <para>&fe_fd;</para> | ||
| 208 | </listitem> | ||
| 209 | </varlistentry> | ||
| 210 | <varlistentry> | ||
| 211 | <term><parameter>request</parameter></term> | ||
| 212 | <listitem> | ||
| 213 | <para>FE_SET_TONE</para> | ||
| 214 | </listitem> | ||
| 215 | </varlistentry> | ||
| 216 | <varlistentry> | ||
| 217 | <term><parameter>net_if</parameter></term> | ||
| 218 | <listitem> | ||
| 219 | <para>pointer to &dvb-net-if;</para> | ||
| 220 | </listitem> | ||
| 221 | </varlistentry> | ||
| 222 | </variablelist> | ||
| 223 | </refsect1> | ||
| 224 | |||
| 225 | <refsect1> | ||
| 226 | <title>Description</title> | ||
| 227 | |||
| 228 | <para>The NET_GET_IF ioctl uses the interface number given by the | ||
| 229 | &dvb-net-if;::ifnum field and fills the content of &dvb-net-if; with | ||
| 230 | the packet ID and encapsulation type used on such interface. If the | ||
| 231 | interface was not created yet with &NET-ADD-IF;, it will return -1 and | ||
| 232 | fill the <constant>errno</constant> with <constant>EINVAL</constant> | ||
| 233 | error code.</para> | ||
| 234 | |||
| 235 | &return-value-dvb; | ||
| 236 | </refsect1> | ||
| 237 | </refentry> | ||
| 238 | </section> | ||
| @@ -1,1968 +0,0 @@ | |||
| 1 | <title>DVB Video Device</title> | ||
| 2 | <para>The DVB video device controls the MPEG2 video decoder of the DVB hardware. It | ||
| 3 | can be accessed through <emphasis role="bold">/dev/dvb/adapter0/video0</emphasis>. Data types and and | ||
| 4 | ioctl definitions can be accessed by including <emphasis role="bold">linux/dvb/video.h</emphasis> in your | ||
| 5 | application. | ||
| 6 | </para> | ||
| 7 | <para>Note that the DVB video device only controls decoding of the MPEG video stream, not | ||
| 8 | its presentation on the TV or computer screen. On PCs this is typically handled by an | ||
| 9 | associated video4linux device, e.g. <emphasis role="bold">/dev/video</emphasis>, which allows scaling and defining output | ||
| 10 | windows. | ||
| 11 | </para> | ||
| 12 | <para>Some DVB cards don’t have their own MPEG decoder, which results in the omission of | ||
| 13 | the audio and video device as well as the video4linux device. | ||
| 14 | </para> | ||
| 15 | <para>The ioctls that deal with SPUs (sub picture units) and navigation packets are only | ||
| 16 | supported on some MPEG decoders made for DVD playback. | ||
| 17 | </para> | ||
| 18 | <para> | ||
| 19 | These ioctls were also used by V4L2 to control MPEG decoders implemented in V4L2. The use | ||
| 20 | of these ioctls for that purpose has been made obsolete and proper V4L2 ioctls or controls | ||
| 21 | have been created to replace that functionality.</para> | ||
| 22 | <section id="video_types"> | ||
| 23 | <title>Video Data Types</title> | ||
| 24 | |||
| 25 | <section id="video-format-t"> | ||
| 26 | <title>video_format_t</title> | ||
| 27 | <para>The <constant>video_format_t</constant> data type defined by | ||
| 28 | </para> | ||
| 29 | <programlisting> | ||
| 30 | typedef enum { | ||
| 31 | VIDEO_FORMAT_4_3, /⋆ Select 4:3 format ⋆/ | ||
| 32 | VIDEO_FORMAT_16_9, /⋆ Select 16:9 format. ⋆/ | ||
| 33 | VIDEO_FORMAT_221_1 /⋆ 2.21:1 ⋆/ | ||
| 34 | } video_format_t; | ||
| 35 | </programlisting> | ||
| 36 | <para>is used in the VIDEO_SET_FORMAT function (??) to tell the driver which aspect ratio | ||
| 37 | the output hardware (e.g. TV) has. It is also used in the data structures video_status | ||
| 38 | (??) returned by VIDEO_GET_STATUS (??) and video_event (??) returned by | ||
| 39 | VIDEO_GET_EVENT (??) which report about the display format of the current video | ||
| 40 | stream. | ||
| 41 | </para> | ||
| 42 | </section> | ||
| 43 | |||
| 44 | <section id="video-displayformat-t"> | ||
| 45 | <title>video_displayformat_t</title> | ||
| 46 | <para>In case the display format of the video stream and of the display hardware differ the | ||
| 47 | application has to specify how to handle the cropping of the picture. This can be done using | ||
| 48 | the VIDEO_SET_DISPLAY_FORMAT call (??) which accepts | ||
| 49 | </para> | ||
| 50 | <programlisting> | ||
| 51 | typedef enum { | ||
| 52 | VIDEO_PAN_SCAN, /⋆ use pan and scan format ⋆/ | ||
| 53 | VIDEO_LETTER_BOX, /⋆ use letterbox format ⋆/ | ||
| 54 | VIDEO_CENTER_CUT_OUT /⋆ use center cut out format ⋆/ | ||
| 55 | } video_displayformat_t; | ||
| 56 | </programlisting> | ||
| 57 | <para>as argument. | ||
| 58 | </para> | ||
| 59 | </section> | ||
| 60 | |||
| 61 | <section id="video-stream-source-t"> | ||
| 62 | <title>video_stream_source_t</title> | ||
| 63 | <para>The video stream source is set through the VIDEO_SELECT_SOURCE call and can take | ||
| 64 | the following values, depending on whether we are replaying from an internal (demuxer) or | ||
| 65 | external (user write) source. | ||
| 66 | </para> | ||
| 67 | <programlisting> | ||
| 68 | typedef enum { | ||
| 69 | VIDEO_SOURCE_DEMUX, /⋆ Select the demux as the main source ⋆/ | ||
| 70 | VIDEO_SOURCE_MEMORY /⋆ If this source is selected, the stream | ||
| 71 | comes from the user through the write | ||
| 72 | system call ⋆/ | ||
| 73 | } video_stream_source_t; | ||
| 74 | </programlisting> | ||
| 75 | <para>VIDEO_SOURCE_DEMUX selects the demultiplexer (fed either by the frontend or the | ||
| 76 | DVR device) as the source of the video stream. If VIDEO_SOURCE_MEMORY | ||
| 77 | is selected the stream comes from the application through the <emphasis role="bold">write()</emphasis> system | ||
| 78 | call. | ||
| 79 | </para> | ||
| 80 | </section> | ||
| 81 | |||
| 82 | <section id="video-play-state-t"> | ||
| 83 | <title>video_play_state_t</title> | ||
| 84 | <para>The following values can be returned by the VIDEO_GET_STATUS call representing the | ||
| 85 | state of video playback. | ||
| 86 | </para> | ||
| 87 | <programlisting> | ||
| 88 | typedef enum { | ||
| 89 | VIDEO_STOPPED, /⋆ Video is stopped ⋆/ | ||
| 90 | VIDEO_PLAYING, /⋆ Video is currently playing ⋆/ | ||
| 91 | VIDEO_FREEZED /⋆ Video is freezed ⋆/ | ||
| 92 | } video_play_state_t; | ||
| 93 | </programlisting> | ||
| 94 | </section> | ||
| 95 | |||
| 96 | <section id="video-command"> | ||
| 97 | <title>struct video_command</title> | ||
| 98 | <para>The structure must be zeroed before use by the application | ||
| 99 | This ensures it can be extended safely in the future.</para> | ||
| 100 | <programlisting> | ||
| 101 | struct video_command { | ||
| 102 | __u32 cmd; | ||
| 103 | __u32 flags; | ||
| 104 | union { | ||
| 105 | struct { | ||
| 106 | __u64 pts; | ||
| 107 | } stop; | ||
| 108 | |||
| 109 | struct { | ||
| 110 | /⋆ 0 or 1000 specifies normal speed, | ||
| 111 | 1 specifies forward single stepping, | ||
| 112 | -1 specifies backward single stepping, | ||
| 113 | >>1: playback at speed/1000 of the normal speed, | ||
| 114 | <-1: reverse playback at (-speed/1000) of the normal speed. ⋆/ | ||
| 115 | __s32 speed; | ||
| 116 | __u32 format; | ||
| 117 | } play; | ||
| 118 | |||
| 119 | struct { | ||
| 120 | __u32 data[16]; | ||
| 121 | } raw; | ||
| 122 | }; | ||
| 123 | }; | ||
| 124 | </programlisting> | ||
| 125 | </section> | ||
| 126 | |||
| 127 | <section id="video-size-t"> | ||
| 128 | <title>video_size_t</title> | ||
| 129 | <programlisting> | ||
| 130 | typedef struct { | ||
| 131 | int w; | ||
| 132 | int h; | ||
| 133 | video_format_t aspect_ratio; | ||
| 134 | } video_size_t; | ||
| 135 | </programlisting> | ||
| 136 | </section> | ||
| 137 | |||
| 138 | |||
| 139 | <section id="video-event"> | ||
| 140 | <title>struct video_event</title> | ||
| 141 | <para>The following is the structure of a video event as it is returned by the VIDEO_GET_EVENT | ||
| 142 | call. | ||
| 143 | </para> | ||
| 144 | <programlisting> | ||
| 145 | struct video_event { | ||
| 146 | __s32 type; | ||
| 147 | #define VIDEO_EVENT_SIZE_CHANGED 1 | ||
| 148 | #define VIDEO_EVENT_FRAME_RATE_CHANGED 2 | ||
| 149 | #define VIDEO_EVENT_DECODER_STOPPED 3 | ||
| 150 | #define VIDEO_EVENT_VSYNC 4 | ||
| 151 | __kernel_time_t timestamp; | ||
| 152 | union { | ||
| 153 | video_size_t size; | ||
| 154 | unsigned int frame_rate; /⋆ in frames per 1000sec ⋆/ | ||
| 155 | unsigned char vsync_field; /⋆ unknown/odd/even/progressive ⋆/ | ||
| 156 | } u; | ||
| 157 | }; | ||
| 158 | </programlisting> | ||
| 159 | </section> | ||
| 160 | |||
| 161 | <section id="video-status"> | ||
| 162 | <title>struct video_status</title> | ||
| 163 | <para>The VIDEO_GET_STATUS call returns the following structure informing about various | ||
| 164 | states of the playback operation. | ||
| 165 | </para> | ||
| 166 | <programlisting> | ||
| 167 | struct video_status { | ||
| 168 | int video_blank; /⋆ blank video on freeze? ⋆/ | ||
| 169 | video_play_state_t play_state; /⋆ current state of playback ⋆/ | ||
| 170 | video_stream_source_t stream_source; /⋆ current source (demux/memory) ⋆/ | ||
| 171 | video_format_t video_format; /⋆ current aspect ratio of stream ⋆/ | ||
| 172 | video_displayformat_t display_format;/⋆ selected cropping mode ⋆/ | ||
| 173 | }; | ||
| 174 | </programlisting> | ||
| 175 | <para>If video_blank is set video will be blanked out if the channel is changed or if playback is | ||
| 176 | stopped. Otherwise, the last picture will be displayed. play_state indicates if the video is | ||
| 177 | currently frozen, stopped, or being played back. The stream_source corresponds to the seleted | ||
| 178 | source for the video stream. It can come either from the demultiplexer or from memory. | ||
| 179 | The video_format indicates the aspect ratio (one of 4:3 or 16:9) of the currently | ||
| 180 | played video stream. Finally, display_format corresponds to the selected cropping | ||
| 181 | mode in case the source video format is not the same as the format of the output | ||
| 182 | device. | ||
| 183 | </para> | ||
| 184 | </section> | ||
| 185 | |||
| 186 | <section id="video-still-picture"> | ||
| 187 | <title>struct video_still_picture</title> | ||
| 188 | <para>An I-frame displayed via the VIDEO_STILLPICTURE call is passed on within the | ||
| 189 | following structure. | ||
| 190 | </para> | ||
| 191 | <programlisting> | ||
| 192 | /⋆ pointer to and size of a single iframe in memory ⋆/ | ||
| 193 | struct video_still_picture { | ||
| 194 | char ⋆iFrame; /⋆ pointer to a single iframe in memory ⋆/ | ||
| 195 | int32_t size; | ||
| 196 | }; | ||
| 197 | </programlisting> | ||
| 198 | </section> | ||
| 199 | |||
| 200 | <section id="video_caps"> | ||
| 201 | <title>video capabilities</title> | ||
| 202 | <para>A call to VIDEO_GET_CAPABILITIES returns an unsigned integer with the following | ||
| 203 | bits set according to the hardwares capabilities. | ||
| 204 | </para> | ||
| 205 | <programlisting> | ||
| 206 | /⋆ bit definitions for capabilities: ⋆/ | ||
| 207 | /⋆ can the hardware decode MPEG1 and/or MPEG2? ⋆/ | ||
| 208 | #define VIDEO_CAP_MPEG1 1 | ||
| 209 | #define VIDEO_CAP_MPEG2 2 | ||
| 210 | /⋆ can you send a system and/or program stream to video device? | ||
| 211 | (you still have to open the video and the audio device but only | ||
| 212 | send the stream to the video device) ⋆/ | ||
| 213 | #define VIDEO_CAP_SYS 4 | ||
| 214 | #define VIDEO_CAP_PROG 8 | ||
| 215 | /⋆ can the driver also handle SPU, NAVI and CSS encoded data? | ||
| 216 | (CSS API is not present yet) ⋆/ | ||
| 217 | #define VIDEO_CAP_SPU 16 | ||
| 218 | #define VIDEO_CAP_NAVI 32 | ||
| 219 | #define VIDEO_CAP_CSS 64 | ||
| 220 | </programlisting> | ||
| 221 | </section> | ||
| 222 | |||
| 223 | <section id="video-system"> | ||
| 224 | <title>video_system_t</title> | ||
| 225 | <para>A call to VIDEO_SET_SYSTEM sets the desired video system for TV output. The | ||
| 226 | following system types can be set: | ||
| 227 | </para> | ||
| 228 | <programlisting> | ||
| 229 | typedef enum { | ||
| 230 | VIDEO_SYSTEM_PAL, | ||
| 231 | VIDEO_SYSTEM_NTSC, | ||
| 232 | VIDEO_SYSTEM_PALN, | ||
| 233 | VIDEO_SYSTEM_PALNc, | ||
| 234 | VIDEO_SYSTEM_PALM, | ||
| 235 | VIDEO_SYSTEM_NTSC60, | ||
| 236 | VIDEO_SYSTEM_PAL60, | ||
| 237 | VIDEO_SYSTEM_PALM60 | ||
| 238 | } video_system_t; | ||
| 239 | </programlisting> | ||
| 240 | </section> | ||
| 241 | |||
| 242 | <section id="video-highlight"> | ||
| 243 | <title>struct video_highlight</title> | ||
| 244 | <para>Calling the ioctl VIDEO_SET_HIGHLIGHTS posts the SPU highlight information. The | ||
| 245 | call expects the following format for that information: | ||
| 246 | </para> | ||
| 247 | <programlisting> | ||
| 248 | typedef | ||
| 249 | struct video_highlight { | ||
| 250 | boolean active; /⋆ 1=show highlight, 0=hide highlight ⋆/ | ||
| 251 | uint8_t contrast1; /⋆ 7- 4 Pattern pixel contrast ⋆/ | ||
| 252 | /⋆ 3- 0 Background pixel contrast ⋆/ | ||
| 253 | uint8_t contrast2; /⋆ 7- 4 Emphasis pixel-2 contrast ⋆/ | ||
| 254 | /⋆ 3- 0 Emphasis pixel-1 contrast ⋆/ | ||
| 255 | uint8_t color1; /⋆ 7- 4 Pattern pixel color ⋆/ | ||
| 256 | /⋆ 3- 0 Background pixel color ⋆/ | ||
| 257 | uint8_t color2; /⋆ 7- 4 Emphasis pixel-2 color ⋆/ | ||
| 258 | /⋆ 3- 0 Emphasis pixel-1 color ⋆/ | ||
| 259 | uint32_t ypos; /⋆ 23-22 auto action mode ⋆/ | ||
| 260 | /⋆ 21-12 start y ⋆/ | ||
| 261 | /⋆ 9- 0 end y ⋆/ | ||
| 262 | uint32_t xpos; /⋆ 23-22 button color number ⋆/ | ||
| 263 | /⋆ 21-12 start x ⋆/ | ||
| 264 | /⋆ 9- 0 end x ⋆/ | ||
| 265 | } video_highlight_t; | ||
| 266 | </programlisting> | ||
| 267 | |||
| 268 | </section> | ||
| 269 | <section id="video-spu"> | ||
| 270 | <title>struct video_spu</title> | ||
| 271 | <para>Calling VIDEO_SET_SPU deactivates or activates SPU decoding, according to the | ||
| 272 | following format: | ||
| 273 | </para> | ||
| 274 | <programlisting> | ||
| 275 | typedef | ||
| 276 | struct video_spu { | ||
| 277 | boolean active; | ||
| 278 | int stream_id; | ||
| 279 | } video_spu_t; | ||
| 280 | </programlisting> | ||
| 281 | |||
| 282 | </section> | ||
| 283 | <section id="video-spu-palette"> | ||
| 284 | <title>struct video_spu_palette</title> | ||
| 285 | <para>The following structure is used to set the SPU palette by calling VIDEO_SPU_PALETTE: | ||
| 286 | </para> | ||
| 287 | <programlisting> | ||
| 288 | typedef | ||
| 289 | struct video_spu_palette { | ||
| 290 | int length; | ||
| 291 | uint8_t ⋆palette; | ||
| 292 | } video_spu_palette_t; | ||
| 293 | </programlisting> | ||
| 294 | |||
| 295 | </section> | ||
| 296 | <section id="video-navi-pack"> | ||
| 297 | <title>struct video_navi_pack</title> | ||
| 298 | <para>In order to get the navigational data the following structure has to be passed to the ioctl | ||
| 299 | VIDEO_GET_NAVI: | ||
| 300 | </para> | ||
| 301 | <programlisting> | ||
| 302 | typedef | ||
| 303 | struct video_navi_pack { | ||
| 304 | int length; /⋆ 0 ... 1024 ⋆/ | ||
| 305 | uint8_t data[1024]; | ||
| 306 | } video_navi_pack_t; | ||
| 307 | </programlisting> | ||
| 308 | </section> | ||
| 309 | |||
| 310 | |||
| 311 | <section id="video-attributes-t"> | ||
| 312 | <title>video_attributes_t</title> | ||
| 313 | <para>The following attributes can be set by a call to VIDEO_SET_ATTRIBUTES: | ||
| 314 | </para> | ||
| 315 | <programlisting> | ||
| 316 | typedef uint16_t video_attributes_t; | ||
| 317 | /⋆ bits: descr. ⋆/ | ||
| 318 | /⋆ 15-14 Video compression mode (0=MPEG-1, 1=MPEG-2) ⋆/ | ||
| 319 | /⋆ 13-12 TV system (0=525/60, 1=625/50) ⋆/ | ||
| 320 | /⋆ 11-10 Aspect ratio (0=4:3, 3=16:9) ⋆/ | ||
| 321 | /⋆ 9- 8 permitted display mode on 4:3 monitor (0=both, 1=only pan-sca ⋆/ | ||
| 322 | /⋆ 7 line 21-1 data present in GOP (1=yes, 0=no) ⋆/ | ||
| 323 | /⋆ 6 line 21-2 data present in GOP (1=yes, 0=no) ⋆/ | ||
| 324 | /⋆ 5- 3 source resolution (0=720x480/576, 1=704x480/576, 2=352x480/57 ⋆/ | ||
| 325 | /⋆ 2 source letterboxed (1=yes, 0=no) ⋆/ | ||
| 326 | /⋆ 0 film/camera mode (0=camera, 1=film (625/50 only)) ⋆/ | ||
| 327 | </programlisting> | ||
| 328 | </section></section> | ||
| 329 | |||
| 330 | |||
| 331 | <section id="video_function_calls"> | ||
| 332 | <title>Video Function Calls</title> | ||
| 333 | |||
| 334 | |||
| 335 | <section id="video_fopen"> | ||
| 336 | <title>open()</title> | ||
| 337 | <para>DESCRIPTION | ||
| 338 | </para> | ||
| 339 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 340 | align="char"> | ||
| 341 | <para>This system call opens a named video device (e.g. /dev/dvb/adapter0/video0) | ||
| 342 | for subsequent use.</para> | ||
| 343 | <para>When an open() call has succeeded, the device will be ready for use. | ||
| 344 | The significance of blocking or non-blocking mode is described in the | ||
| 345 | documentation for functions where there is a difference. It does not affect the | ||
| 346 | semantics of the open() call itself. A device opened in blocking mode can later | ||
| 347 | be put into non-blocking mode (and vice versa) using the F_SETFL command | ||
| 348 | of the fcntl system call. This is a standard system call, documented in the Linux | ||
| 349 | manual page for fcntl. Only one user can open the Video Device in O_RDWR | ||
| 350 | mode. All other attempts to open the device in this mode will fail, and an | ||
| 351 | error-code will be returned. If the Video Device is opened in O_RDONLY | ||
| 352 | mode, the only ioctl call that can be used is VIDEO_GET_STATUS. All other | ||
| 353 | call will return an error code.</para> | ||
| 354 | </entry> | ||
| 355 | </row></tbody></tgroup></informaltable> | ||
| 356 | |||
| 357 | <para>SYNOPSIS | ||
| 358 | </para> | ||
| 359 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 360 | align="char"> | ||
| 361 | <para>int open(const char ⋆deviceName, int flags);</para> | ||
| 362 | </entry> | ||
| 363 | </row></tbody></tgroup></informaltable> | ||
| 364 | <para>PARAMETERS | ||
| 365 | </para> | ||
| 366 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 367 | align="char"> | ||
| 368 | <para>const char | ||
| 369 | *deviceName</para> | ||
| 370 | </entry><entry | ||
| 371 | align="char"> | ||
| 372 | <para>Name of specific video device.</para> | ||
| 373 | </entry> | ||
| 374 | </row><row><entry | ||
| 375 | align="char"> | ||
| 376 | <para>int flags</para> | ||
| 377 | </entry><entry | ||
| 378 | align="char"> | ||
| 379 | <para>A bit-wise OR of the following flags:</para> | ||
| 380 | </entry> | ||
| 381 | </row><row><entry | ||
| 382 | align="char"> | ||
| 383 | </entry><entry | ||
| 384 | align="char"> | ||
| 385 | <para>O_RDONLY read-only access</para> | ||
| 386 | </entry> | ||
| 387 | </row><row><entry | ||
| 388 | align="char"> | ||
| 389 | </entry><entry | ||
| 390 | align="char"> | ||
| 391 | <para>O_RDWR read/write access</para> | ||
| 392 | </entry> | ||
| 393 | </row><row><entry | ||
| 394 | align="char"> | ||
| 395 | </entry><entry | ||
| 396 | align="char"> | ||
| 397 | <para>O_NONBLOCK open in non-blocking mode</para> | ||
| 398 | </entry> | ||
| 399 | </row><row><entry | ||
| 400 | align="char"> | ||
| 401 | </entry><entry | ||
| 402 | align="char"> | ||
| 403 | <para>(blocking mode is the default)</para> | ||
| 404 | </entry> | ||
| 405 | </row></tbody></tgroup></informaltable> | ||
| 406 | <para>RETURN VALUE</para> | ||
| 407 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 408 | align="char"> | ||
| 409 | <para>ENODEV</para> | ||
| 410 | </entry><entry | ||
| 411 | align="char"> | ||
| 412 | <para>Device driver not loaded/available.</para> | ||
| 413 | </entry> | ||
| 414 | </row><row><entry | ||
| 415 | align="char"> | ||
| 416 | <para>EINTERNAL</para> | ||
| 417 | </entry><entry | ||
| 418 | align="char"> | ||
| 419 | <para>Internal error.</para> | ||
| 420 | </entry> | ||
| 421 | </row><row><entry | ||
| 422 | align="char"> | ||
| 423 | <para>EBUSY</para> | ||
| 424 | </entry><entry | ||
| 425 | align="char"> | ||
| 426 | <para>Device or resource busy.</para> | ||
| 427 | </entry> | ||
| 428 | </row><row><entry | ||
| 429 | align="char"> | ||
| 430 | <para>EINVAL</para> | ||
| 431 | </entry><entry | ||
| 432 | align="char"> | ||
| 433 | <para>Invalid argument.</para> | ||
| 434 | </entry> | ||
| 435 | </row></tbody></tgroup></informaltable> | ||
| 436 | |||
| 437 | </section> | ||
| 438 | <section id="video_fclose"> | ||
| 439 | <title>close()</title> | ||
| 440 | <para>DESCRIPTION | ||
| 441 | </para> | ||
| 442 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 443 | align="char"> | ||
| 444 | <para>This system call closes a previously opened video device.</para> | ||
| 445 | </entry> | ||
| 446 | </row></tbody></tgroup></informaltable> | ||
| 447 | <para>SYNOPSIS | ||
| 448 | </para> | ||
| 449 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 450 | align="char"> | ||
| 451 | <para>int close(int fd);</para> | ||
| 452 | </entry> | ||
| 453 | </row></tbody></tgroup></informaltable> | ||
| 454 | <para>PARAMETERS | ||
| 455 | </para> | ||
| 456 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 457 | align="char"> | ||
| 458 | <para>int fd</para> | ||
| 459 | </entry><entry | ||
| 460 | align="char"> | ||
| 461 | <para>File descriptor returned by a previous call to open().</para> | ||
| 462 | </entry> | ||
| 463 | </row></tbody></tgroup></informaltable> | ||
| 464 | <para>RETURN VALUE</para> | ||
| 465 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 466 | align="char"> | ||
| 467 | <para>EBADF</para> | ||
| 468 | </entry><entry | ||
| 469 | align="char"> | ||
| 470 | <para>fd is not a valid open file descriptor.</para> | ||
| 471 | </entry> | ||
| 472 | </row></tbody></tgroup></informaltable> | ||
| 473 | |||
| 474 | </section> | ||
| 475 | <section id="video_fwrite"> | ||
| 476 | <title>write()</title> | ||
| 477 | <para>DESCRIPTION | ||
| 478 | </para> | ||
| 479 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 480 | align="char"> | ||
| 481 | <para>This system call can only be used if VIDEO_SOURCE_MEMORY is selected | ||
| 482 | in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in | ||
| 483 | PES format, unless the capability allows other formats. If O_NONBLOCK is | ||
| 484 | not specified the function will block until buffer space is available. The amount | ||
| 485 | of data to be transferred is implied by count.</para> | ||
| 486 | </entry> | ||
| 487 | </row></tbody></tgroup></informaltable> | ||
| 488 | <para>SYNOPSIS | ||
| 489 | </para> | ||
| 490 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 491 | align="char"> | ||
| 492 | <para>size_t write(int fd, const void ⋆buf, size_t count);</para> | ||
| 493 | </entry> | ||
| 494 | </row></tbody></tgroup></informaltable> | ||
| 495 | <para>PARAMETERS | ||
| 496 | </para> | ||
| 497 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 498 | align="char"> | ||
| 499 | <para>int fd</para> | ||
| 500 | </entry><entry | ||
| 501 | align="char"> | ||
| 502 | <para>File descriptor returned by a previous call to open().</para> | ||
| 503 | </entry> | ||
| 504 | </row><row><entry | ||
| 505 | align="char"> | ||
| 506 | <para>void *buf</para> | ||
| 507 | </entry><entry | ||
| 508 | align="char"> | ||
| 509 | <para>Pointer to the buffer containing the PES data.</para> | ||
| 510 | </entry> | ||
| 511 | </row><row><entry | ||
| 512 | align="char"> | ||
| 513 | <para>size_t count</para> | ||
| 514 | </entry><entry | ||
| 515 | align="char"> | ||
| 516 | <para>Size of buf.</para> | ||
| 517 | </entry> | ||
| 518 | </row></tbody></tgroup></informaltable> | ||
| 519 | <para>RETURN VALUE</para> | ||
| 520 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 521 | align="char"> | ||
| 522 | <para>EPERM</para> | ||
| 523 | </entry><entry | ||
| 524 | align="char"> | ||
| 525 | <para>Mode VIDEO_SOURCE_MEMORY not selected.</para> | ||
| 526 | </entry> | ||
| 527 | </row><row><entry | ||
| 528 | align="char"> | ||
| 529 | <para>ENOMEM</para> | ||
| 530 | </entry><entry | ||
| 531 | align="char"> | ||
| 532 | <para>Attempted to write more data than the internal buffer can | ||
| 533 | hold.</para> | ||
| 534 | </entry> | ||
| 535 | </row><row><entry | ||
| 536 | align="char"> | ||
| 537 | <para>EBADF</para> | ||
| 538 | </entry><entry | ||
| 539 | align="char"> | ||
| 540 | <para>fd is not a valid open file descriptor.</para> | ||
| 541 | </entry> | ||
| 542 | </row></tbody></tgroup></informaltable> | ||
| 543 | |||
| 544 | </section><section id="VIDEO_STOP" | ||
| 545 | role="subsection"><title>VIDEO_STOP</title> | ||
| 546 | <para>DESCRIPTION | ||
| 547 | </para> | ||
| 548 | <para>This ioctl is for DVB devices only. To control a V4L2 decoder use the V4L2 | ||
| 549 | &VIDIOC-DECODER-CMD; instead.</para> | ||
| 550 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 551 | align="char"> | ||
| 552 | <para>This ioctl call asks the Video Device to stop playing the current stream. | ||
| 553 | Depending on the input parameter, the screen can be blanked out or displaying | ||
| 554 | the last decoded frame.</para> | ||
| 555 | </entry> | ||
| 556 | </row></tbody></tgroup></informaltable> | ||
| 557 | <para>SYNOPSIS | ||
| 558 | </para> | ||
| 559 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 560 | align="char"> | ||
| 561 | <para>int ioctl(fd, int request = VIDEO_STOP, boolean | ||
| 562 | mode);</para> | ||
| 563 | </entry> | ||
| 564 | </row></tbody></tgroup></informaltable> | ||
| 565 | <para>PARAMETERS | ||
| 566 | </para> | ||
| 567 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 568 | align="char"> | ||
| 569 | <para>int fd</para> | ||
| 570 | </entry><entry | ||
| 571 | align="char"> | ||
| 572 | <para>File descriptor returned by a previous call to open().</para> | ||
| 573 | </entry> | ||
| 574 | </row><row><entry | ||
| 575 | align="char"> | ||
| 576 | <para>int request</para> | ||
| 577 | </entry><entry | ||
| 578 | align="char"> | ||
| 579 | <para>Equals VIDEO_STOP for this command.</para> | ||
| 580 | </entry> | ||
| 581 | </row><row><entry | ||
| 582 | align="char"> | ||
| 583 | <para>Boolean mode</para> | ||
| 584 | </entry><entry | ||
| 585 | align="char"> | ||
| 586 | <para>Indicates how the screen shall be handled.</para> | ||
| 587 | </entry> | ||
| 588 | </row><row><entry | ||
| 589 | align="char"> | ||
| 590 | </entry><entry | ||
| 591 | align="char"> | ||
| 592 | <para>TRUE: Blank screen when stop.</para> | ||
| 593 | </entry> | ||
| 594 | </row><row><entry | ||
| 595 | align="char"> | ||
| 596 | </entry><entry | ||
| 597 | align="char"> | ||
| 598 | <para>FALSE: Show last decoded frame.</para> | ||
| 599 | </entry> | ||
| 600 | </row></tbody></tgroup></informaltable> | ||
| 601 | &return-value-dvb; | ||
| 602 | |||
| 603 | </section><section id="VIDEO_PLAY" | ||
| 604 | role="subsection"><title>VIDEO_PLAY</title> | ||
| 605 | <para>DESCRIPTION | ||
| 606 | </para> | ||
| 607 | <para>This ioctl is for DVB devices only. To control a V4L2 decoder use the V4L2 | ||
| 608 | &VIDIOC-DECODER-CMD; instead.</para> | ||
| 609 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 610 | align="char"> | ||
| 611 | <para>This ioctl call asks the Video Device to start playing a video stream from the | ||
| 612 | selected source.</para> | ||
| 613 | </entry> | ||
| 614 | </row></tbody></tgroup></informaltable> | ||
| 615 | <para>SYNOPSIS | ||
| 616 | </para> | ||
| 617 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 618 | align="char"> | ||
| 619 | <para>int ioctl(fd, int request = VIDEO_PLAY);</para> | ||
| 620 | </entry> | ||
| 621 | </row></tbody></tgroup></informaltable> | ||
| 622 | <para>PARAMETERS | ||
| 623 | </para> | ||
| 624 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 625 | align="char"> | ||
| 626 | <para>int fd</para> | ||
| 627 | </entry><entry | ||
| 628 | align="char"> | ||
| 629 | <para>File descriptor returned by a previous call to open().</para> | ||
| 630 | </entry> | ||
| 631 | </row><row><entry | ||
| 632 | align="char"> | ||
| 633 | <para>int request</para> | ||
| 634 | </entry><entry | ||
| 635 | align="char"> | ||
| 636 | <para>Equals VIDEO_PLAY for this command.</para> | ||
| 637 | </entry> | ||
| 638 | </row></tbody></tgroup></informaltable> | ||
| 639 | &return-value-dvb; | ||
| 640 | |||
| 641 | </section><section id="VIDEO_FREEZE" | ||
| 642 | role="subsection"><title>VIDEO_FREEZE</title> | ||
| 643 | <para>DESCRIPTION | ||
| 644 | </para> | ||
| 645 | <para>This ioctl is for DVB devices only. To control a V4L2 decoder use the V4L2 | ||
| 646 | &VIDIOC-DECODER-CMD; instead.</para> | ||
| 647 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 648 | align="char"> | ||
| 649 | <para>This ioctl call suspends the live video stream being played. Decoding | ||
| 650 | and playing are frozen. It is then possible to restart the decoding | ||
| 651 | and playing process of the video stream using the VIDEO_CONTINUE | ||
| 652 | command. If VIDEO_SOURCE_MEMORY is selected in the ioctl call | ||
| 653 | VIDEO_SELECT_SOURCE, the DVB subsystem will not decode any more | ||
| 654 | data until the ioctl call VIDEO_CONTINUE or VIDEO_PLAY is performed.</para> | ||
| 655 | </entry> | ||
| 656 | </row></tbody></tgroup></informaltable> | ||
| 657 | <para>SYNOPSIS | ||
| 658 | </para> | ||
| 659 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 660 | align="char"> | ||
| 661 | <para>int ioctl(fd, int request = VIDEO_FREEZE);</para> | ||
| 662 | </entry> | ||
| 663 | </row></tbody></tgroup></informaltable> | ||
| 664 | <para>PARAMETERS | ||
| 665 | </para> | ||
| 666 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 667 | align="char"> | ||
| 668 | <para>int fd</para> | ||
| 669 | </entry><entry | ||
| 670 | align="char"> | ||
| 671 | <para>File descriptor returned by a previous call to open().</para> | ||
| 672 | </entry> | ||
| 673 | </row><row><entry | ||
| 674 | align="char"> | ||
| 675 | <para>int request</para> | ||
| 676 | </entry><entry | ||
| 677 | align="char"> | ||
| 678 | <para>Equals VIDEO_FREEZE for this command.</para> | ||
| 679 | </entry> | ||
| 680 | </row></tbody></tgroup></informaltable> | ||
| 681 | &return-value-dvb; | ||
| 682 | |||
| 683 | </section><section id="VIDEO_CONTINUE" | ||
| 684 | role="subsection"><title>VIDEO_CONTINUE</title> | ||
| 685 | <para>DESCRIPTION | ||
| 686 | </para> | ||
| 687 | <para>This ioctl is for DVB devices only. To control a V4L2 decoder use the V4L2 | ||
| 688 | &VIDIOC-DECODER-CMD; instead.</para> | ||
| 689 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 690 | align="char"> | ||
| 691 | <para>This ioctl call restarts decoding and playing processes of the video stream | ||
| 692 | which was played before a call to VIDEO_FREEZE was made.</para> | ||
| 693 | </entry> | ||
| 694 | </row></tbody></tgroup></informaltable> | ||
| 695 | <para>SYNOPSIS | ||
| 696 | </para> | ||
| 697 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 698 | align="char"> | ||
| 699 | <para>int ioctl(fd, int request = VIDEO_CONTINUE);</para> | ||
| 700 | </entry> | ||
| 701 | </row></tbody></tgroup></informaltable> | ||
| 702 | <para>PARAMETERS | ||
| 703 | </para> | ||
| 704 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 705 | align="char"> | ||
| 706 | <para>int fd</para> | ||
| 707 | </entry><entry | ||
| 708 | align="char"> | ||
| 709 | <para>File descriptor returned by a previous call to open().</para> | ||
| 710 | </entry> | ||
| 711 | </row><row><entry | ||
| 712 | align="char"> | ||
| 713 | <para>int request</para> | ||
| 714 | </entry><entry | ||
| 715 | align="char"> | ||
| 716 | <para>Equals VIDEO_CONTINUE for this command.</para> | ||
| 717 | </entry> | ||
| 718 | </row></tbody></tgroup></informaltable> | ||
| 719 | &return-value-dvb; | ||
| 720 | |||
| 721 | </section><section id="VIDEO_SELECT_SOURCE" | ||
| 722 | role="subsection"><title>VIDEO_SELECT_SOURCE</title> | ||
| 723 | <para>DESCRIPTION | ||
| 724 | </para> | ||
| 725 | <para>This ioctl is for DVB devices only. This ioctl was also supported by the | ||
| 726 | V4L2 ivtv driver, but that has been replaced by the ivtv-specific | ||
| 727 | <constant>IVTV_IOC_PASSTHROUGH_MODE</constant> ioctl.</para> | ||
| 728 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 729 | align="char"> | ||
| 730 | <para>This ioctl call informs the video device which source shall be used for the input | ||
| 731 | data. The possible sources are demux or memory. If memory is selected, the | ||
| 732 | data is fed to the video device through the write command.</para> | ||
| 733 | </entry> | ||
| 734 | </row></tbody></tgroup></informaltable> | ||
| 735 | <para>SYNOPSIS | ||
| 736 | </para> | ||
| 737 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 738 | align="char"> | ||
| 739 | <para>int ioctl(fd, int request = VIDEO_SELECT_SOURCE, | ||
| 740 | video_stream_source_t source);</para> | ||
| 741 | </entry> | ||
| 742 | </row></tbody></tgroup></informaltable> | ||
| 743 | <para>PARAMETERS | ||
| 744 | </para> | ||
| 745 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 746 | align="char"> | ||
| 747 | <para>int fd</para> | ||
| 748 | </entry><entry | ||
| 749 | align="char"> | ||
| 750 | <para>File descriptor returned by a previous call to open().</para> | ||
| 751 | </entry> | ||
| 752 | </row><row><entry | ||
| 753 | align="char"> | ||
| 754 | <para>int request</para> | ||
| 755 | </entry><entry | ||
| 756 | align="char"> | ||
| 757 | <para>Equals VIDEO_SELECT_SOURCE for this command.</para> | ||
| 758 | </entry> | ||
| 759 | </row><row><entry | ||
| 760 | align="char"> | ||
| 761 | <para>video_stream_source_t | ||
| 762 | source</para> | ||
| 763 | </entry><entry | ||
| 764 | align="char"> | ||
| 765 | <para>Indicates which source shall be used for the Video stream.</para> | ||
| 766 | </entry> | ||
| 767 | </row></tbody></tgroup></informaltable> | ||
| 768 | &return-value-dvb; | ||
| 769 | |||
| 770 | </section><section id="VIDEO_SET_BLANK" | ||
| 771 | role="subsection"><title>VIDEO_SET_BLANK</title> | ||
| 772 | <para>DESCRIPTION | ||
| 773 | </para> | ||
| 774 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 775 | align="char"> | ||
| 776 | <para>This ioctl call asks the Video Device to blank out the picture.</para> | ||
| 777 | </entry> | ||
| 778 | </row></tbody></tgroup></informaltable> | ||
| 779 | <para>SYNOPSIS | ||
| 780 | </para> | ||
| 781 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 782 | align="char"> | ||
| 783 | <para>int ioctl(fd, int request = VIDEO_SET_BLANK, boolean | ||
| 784 | mode);</para> | ||
| 785 | </entry> | ||
| 786 | </row></tbody></tgroup></informaltable> | ||
| 787 | <para>PARAMETERS | ||
| 788 | </para> | ||
| 789 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 790 | align="char"> | ||
| 791 | <para>int fd</para> | ||
| 792 | </entry><entry | ||
| 793 | align="char"> | ||
| 794 | <para>File descriptor returned by a previous call to open().</para> | ||
| 795 | </entry> | ||
| 796 | </row><row><entry | ||
| 797 | align="char"> | ||
| 798 | <para>int request</para> | ||
| 799 | </entry><entry | ||
| 800 | align="char"> | ||
| 801 | <para>Equals VIDEO_SET_BLANK for this command.</para> | ||
| 802 | </entry> | ||
| 803 | </row><row><entry | ||
| 804 | align="char"> | ||
| 805 | <para>boolean mode</para> | ||
| 806 | </entry><entry | ||
| 807 | align="char"> | ||
| 808 | <para>TRUE: Blank screen when stop.</para> | ||
| 809 | </entry> | ||
| 810 | </row><row><entry | ||
| 811 | align="char"> | ||
| 812 | </entry><entry | ||
| 813 | align="char"> | ||
| 814 | <para>FALSE: Show last decoded frame.</para> | ||
| 815 | </entry> | ||
| 816 | </row></tbody></tgroup></informaltable> | ||
| 817 | &return-value-dvb; | ||
| 818 | |||
| 819 | </section><section id="VIDEO_GET_STATUS" | ||
| 820 | role="subsection"><title>VIDEO_GET_STATUS</title> | ||
| 821 | <para>DESCRIPTION | ||
| 822 | </para> | ||
| 823 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 824 | align="char"> | ||
| 825 | <para>This ioctl call asks the Video Device to return the current status of the device.</para> | ||
| 826 | </entry> | ||
| 827 | </row></tbody></tgroup></informaltable> | ||
| 828 | <para>SYNOPSIS | ||
| 829 | </para> | ||
| 830 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 831 | align="char"> | ||
| 832 | <para> int ioctl(fd, int request = VIDEO_GET_STATUS, struct | ||
| 833 | video_status ⋆status);</para> | ||
| 834 | </entry> | ||
| 835 | </row></tbody></tgroup></informaltable> | ||
| 836 | <para>PARAMETERS | ||
| 837 | </para> | ||
| 838 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 839 | align="char"> | ||
| 840 | <para>int fd</para> | ||
| 841 | </entry><entry | ||
| 842 | align="char"> | ||
| 843 | <para>File descriptor returned by a previous call to open().</para> | ||
| 844 | </entry> | ||
| 845 | </row><row><entry | ||
| 846 | align="char"> | ||
| 847 | <para>int request</para> | ||
| 848 | </entry><entry | ||
| 849 | align="char"> | ||
| 850 | <para>Equals VIDEO_GET_STATUS for this command.</para> | ||
| 851 | </entry> | ||
| 852 | </row><row><entry | ||
| 853 | align="char"> | ||
| 854 | <para>struct video_status | ||
| 855 | *status</para> | ||
| 856 | </entry><entry | ||
| 857 | align="char"> | ||
| 858 | <para>Returns the current status of the Video Device.</para> | ||
| 859 | </entry> | ||
| 860 | </row></tbody></tgroup></informaltable> | ||
| 861 | &return-value-dvb; | ||
| 862 | |||
| 863 | </section><section id="VIDEO_GET_FRAME_COUNT" | ||
| 864 | role="subsection"><title>VIDEO_GET_FRAME_COUNT</title> | ||
| 865 | <para>DESCRIPTION | ||
| 866 | </para> | ||
| 867 | <para>This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders this | ||
| 868 | ioctl has been replaced by the <constant>V4L2_CID_MPEG_VIDEO_DEC_FRAME</constant> control.</para> | ||
| 869 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 870 | align="char"> | ||
| 871 | <para>This ioctl call asks the Video Device to return the number of displayed frames | ||
| 872 | since the decoder was started.</para> | ||
| 873 | </entry> | ||
| 874 | </row></tbody></tgroup></informaltable> | ||
| 875 | <para>SYNOPSIS | ||
| 876 | </para> | ||
| 877 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 878 | align="char"> | ||
| 879 | <para>int ioctl(int fd, int request = | ||
| 880 | VIDEO_GET_FRAME_COUNT, __u64 *pts);</para> | ||
| 881 | </entry> | ||
| 882 | </row></tbody></tgroup></informaltable> | ||
| 883 | <para>PARAMETERS | ||
| 884 | </para> | ||
| 885 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 886 | align="char"> | ||
| 887 | <para>int fd</para> | ||
| 888 | </entry><entry | ||
| 889 | align="char"> | ||
| 890 | <para>File descriptor returned by a previous call to open().</para> | ||
| 891 | </entry> | ||
| 892 | </row><row><entry | ||
| 893 | align="char"> | ||
| 894 | <para>int request</para> | ||
| 895 | </entry><entry | ||
| 896 | align="char"> | ||
| 897 | <para>Equals VIDEO_GET_FRAME_COUNT for this | ||
| 898 | command.</para> | ||
| 899 | </entry> | ||
| 900 | </row><row><entry | ||
| 901 | align="char"> | ||
| 902 | <para>__u64 *pts | ||
| 903 | </para> | ||
| 904 | </entry><entry | ||
| 905 | align="char"> | ||
| 906 | <para>Returns the number of frames displayed since the decoder was started. | ||
| 907 | </para> | ||
| 908 | </entry> | ||
| 909 | </row></tbody></tgroup></informaltable> | ||
| 910 | &return-value-dvb; | ||
| 911 | |||
| 912 | </section><section id="VIDEO_GET_PTS" | ||
| 913 | role="subsection"><title>VIDEO_GET_PTS</title> | ||
| 914 | <para>DESCRIPTION | ||
| 915 | </para> | ||
| 916 | <para>This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders this | ||
| 917 | ioctl has been replaced by the <constant>V4L2_CID_MPEG_VIDEO_DEC_PTS</constant> control.</para> | ||
| 918 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 919 | align="char"> | ||
| 920 | <para>This ioctl call asks the Video Device to return the current PTS timestamp.</para> | ||
| 921 | </entry> | ||
| 922 | </row></tbody></tgroup></informaltable> | ||
| 923 | <para>SYNOPSIS | ||
| 924 | </para> | ||
| 925 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 926 | align="char"> | ||
| 927 | <para>int ioctl(int fd, int request = | ||
| 928 | VIDEO_GET_PTS, __u64 *pts);</para> | ||
| 929 | </entry> | ||
| 930 | </row></tbody></tgroup></informaltable> | ||
| 931 | <para>PARAMETERS | ||
| 932 | </para> | ||
| 933 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 934 | align="char"> | ||
| 935 | <para>int fd</para> | ||
| 936 | </entry><entry | ||
| 937 | align="char"> | ||
| 938 | <para>File descriptor returned by a previous call to open().</para> | ||
| 939 | </entry> | ||
| 940 | </row><row><entry | ||
| 941 | align="char"> | ||
| 942 | <para>int request</para> | ||
| 943 | </entry><entry | ||
| 944 | align="char"> | ||
| 945 | <para>Equals VIDEO_GET_PTS for this | ||
| 946 | command.</para> | ||
| 947 | </entry> | ||
| 948 | </row><row><entry | ||
| 949 | align="char"> | ||
| 950 | <para>__u64 *pts | ||
| 951 | </para> | ||
| 952 | </entry><entry | ||
| 953 | align="char"> | ||
| 954 | <para>Returns the 33-bit timestamp as defined in ITU T-REC-H.222.0 / ISO/IEC 13818-1. | ||
| 955 | </para> | ||
| 956 | <para> | ||
| 957 | The PTS should belong to the currently played | ||
| 958 | frame if possible, but may also be a value close to it | ||
| 959 | like the PTS of the last decoded frame or the last PTS | ||
| 960 | extracted by the PES parser.</para> | ||
| 961 | </entry> | ||
| 962 | </row></tbody></tgroup></informaltable> | ||
| 963 | &return-value-dvb; | ||
| 964 | |||
| 965 | </section><section id="VIDEO_GET_FRAME_RATE" | ||
| 966 | role="subsection"><title>VIDEO_GET_FRAME_RATE</title> | ||
| 967 | <para>DESCRIPTION | ||
| 968 | </para> | ||
| 969 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 970 | align="char"> | ||
| 971 | <para>This ioctl call asks the Video Device to return the current framerate.</para> | ||
| 972 | </entry> | ||
| 973 | </row></tbody></tgroup></informaltable> | ||
| 974 | <para>SYNOPSIS | ||
| 975 | </para> | ||
| 976 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 977 | align="char"> | ||
| 978 | <para>int ioctl(int fd, int request = | ||
| 979 | VIDEO_GET_FRAME_RATE, unsigned int *rate);</para> | ||
| 980 | </entry> | ||
| 981 | </row></tbody></tgroup></informaltable> | ||
| 982 | <para>PARAMETERS | ||
| 983 | </para> | ||
| 984 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 985 | align="char"> | ||
| 986 | <para>int fd</para> | ||
| 987 | </entry><entry | ||
| 988 | align="char"> | ||
| 989 | <para>File descriptor returned by a previous call to open().</para> | ||
| 990 | </entry> | ||
| 991 | </row><row><entry | ||
| 992 | align="char"> | ||
| 993 | <para>int request</para> | ||
| 994 | </entry><entry | ||
| 995 | align="char"> | ||
| 996 | <para>Equals VIDEO_GET_FRAME_RATE for this | ||
| 997 | command.</para> | ||
| 998 | </entry> | ||
| 999 | </row><row><entry | ||
| 1000 | align="char"> | ||
| 1001 | <para>unsigned int *rate | ||
| 1002 | </para> | ||
| 1003 | </entry><entry | ||
| 1004 | align="char"> | ||
| 1005 | <para>Returns the framerate in number of frames per 1000 seconds. | ||
| 1006 | </para> | ||
| 1007 | </entry> | ||
| 1008 | </row></tbody></tgroup></informaltable> | ||
| 1009 | &return-value-dvb; | ||
| 1010 | |||
| 1011 | </section><section id="VIDEO_GET_EVENT" | ||
| 1012 | role="subsection"><title>VIDEO_GET_EVENT</title> | ||
| 1013 | <para>DESCRIPTION | ||
| 1014 | </para> | ||
| 1015 | <para>This ioctl is for DVB devices only. To get events from a V4L2 decoder use the V4L2 | ||
| 1016 | &VIDIOC-DQEVENT; ioctl instead.</para> | ||
| 1017 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1018 | align="char"> | ||
| 1019 | <para>This ioctl call returns an event of type video_event if available. If an event is | ||
| 1020 | not available, the behavior depends on whether the device is in blocking or | ||
| 1021 | non-blocking mode. In the latter case, the call fails immediately with errno | ||
| 1022 | set to EWOULDBLOCK. In the former case, the call blocks until an event | ||
| 1023 | becomes available. The standard Linux poll() and/or select() system calls can | ||
| 1024 | be used with the device file descriptor to watch for new events. For select(), | ||
| 1025 | the file descriptor should be included in the exceptfds argument, and for | ||
| 1026 | poll(), POLLPRI should be specified as the wake-up condition. Read-only | ||
| 1027 | permissions are sufficient for this ioctl call.</para> | ||
| 1028 | </entry> | ||
| 1029 | </row></tbody></tgroup></informaltable> | ||
| 1030 | <para>SYNOPSIS | ||
| 1031 | </para> | ||
| 1032 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1033 | align="char"> | ||
| 1034 | <para> int ioctl(fd, int request = VIDEO_GET_EVENT, struct | ||
| 1035 | video_event ⋆ev);</para> | ||
| 1036 | </entry> | ||
| 1037 | </row></tbody></tgroup></informaltable> | ||
| 1038 | <para>PARAMETERS | ||
| 1039 | </para> | ||
| 1040 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1041 | align="char"> | ||
| 1042 | <para>int fd</para> | ||
| 1043 | </entry><entry | ||
| 1044 | align="char"> | ||
| 1045 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1046 | </entry> | ||
| 1047 | </row><row><entry | ||
| 1048 | align="char"> | ||
| 1049 | <para>int request</para> | ||
| 1050 | </entry><entry | ||
| 1051 | align="char"> | ||
| 1052 | <para>Equals VIDEO_GET_EVENT for this command.</para> | ||
| 1053 | </entry> | ||
| 1054 | </row><row><entry | ||
| 1055 | align="char"> | ||
| 1056 | <para>struct video_event | ||
| 1057 | *ev</para> | ||
| 1058 | </entry><entry | ||
| 1059 | align="char"> | ||
| 1060 | <para>Points to the location where the event, if any, is to be | ||
| 1061 | stored.</para> | ||
| 1062 | </entry> | ||
| 1063 | </row></tbody></tgroup></informaltable> | ||
| 1064 | &return-value-dvb; | ||
| 1065 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1066 | align="char"> | ||
| 1067 | <para>EWOULDBLOCK</para> | ||
| 1068 | </entry><entry | ||
| 1069 | align="char"> | ||
| 1070 | <para>There is no event pending, and the device is in | ||
| 1071 | non-blocking mode.</para> | ||
| 1072 | </entry> | ||
| 1073 | </row><row><entry | ||
| 1074 | align="char"> | ||
| 1075 | <para>EOVERFLOW</para> | ||
| 1076 | </entry><entry | ||
| 1077 | align="char"> | ||
| 1078 | <para>Overflow in event queue - one or more events were lost.</para> | ||
| 1079 | </entry> | ||
| 1080 | </row></tbody></tgroup></informaltable> | ||
| 1081 | |||
| 1082 | </section><section id="VIDEO_COMMAND" | ||
| 1083 | role="subsection"><title>VIDEO_COMMAND</title> | ||
| 1084 | <para>DESCRIPTION | ||
| 1085 | </para> | ||
| 1086 | <para>This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders this | ||
| 1087 | ioctl has been replaced by the &VIDIOC-DECODER-CMD; ioctl.</para> | ||
| 1088 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1089 | align="char"> | ||
| 1090 | <para>This ioctl commands the decoder. The <constant>video_command</constant> struct | ||
| 1091 | is a subset of the <constant>v4l2_decoder_cmd</constant> struct, so refer to the | ||
| 1092 | &VIDIOC-DECODER-CMD; documentation for more information.</para> | ||
| 1093 | </entry> | ||
| 1094 | </row></tbody></tgroup></informaltable> | ||
| 1095 | <para>SYNOPSIS | ||
| 1096 | </para> | ||
| 1097 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1098 | align="char"> | ||
| 1099 | <para>int ioctl(int fd, int request = | ||
| 1100 | VIDEO_COMMAND, struct video_command *cmd);</para> | ||
| 1101 | </entry> | ||
| 1102 | </row></tbody></tgroup></informaltable> | ||
| 1103 | <para>PARAMETERS | ||
| 1104 | </para> | ||
| 1105 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1106 | align="char"> | ||
| 1107 | <para>int fd</para> | ||
| 1108 | </entry><entry | ||
| 1109 | align="char"> | ||
| 1110 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1111 | </entry> | ||
| 1112 | </row><row><entry | ||
| 1113 | align="char"> | ||
| 1114 | <para>int request</para> | ||
| 1115 | </entry><entry | ||
| 1116 | align="char"> | ||
| 1117 | <para>Equals VIDEO_COMMAND for this | ||
| 1118 | command.</para> | ||
| 1119 | </entry> | ||
| 1120 | </row><row><entry | ||
| 1121 | align="char"> | ||
| 1122 | <para>struct video_command *cmd | ||
| 1123 | </para> | ||
| 1124 | </entry><entry | ||
| 1125 | align="char"> | ||
| 1126 | <para>Commands the decoder. | ||
| 1127 | </para> | ||
| 1128 | </entry> | ||
| 1129 | </row></tbody></tgroup></informaltable> | ||
| 1130 | &return-value-dvb; | ||
| 1131 | |||
| 1132 | </section><section id="VIDEO_TRY_COMMAND" | ||
| 1133 | role="subsection"><title>VIDEO_TRY_COMMAND</title> | ||
| 1134 | <para>DESCRIPTION | ||
| 1135 | </para> | ||
| 1136 | <para>This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders this | ||
| 1137 | ioctl has been replaced by the &VIDIOC-TRY-DECODER-CMD; ioctl.</para> | ||
| 1138 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1139 | align="char"> | ||
| 1140 | <para>This ioctl tries a decoder command. The <constant>video_command</constant> struct | ||
| 1141 | is a subset of the <constant>v4l2_decoder_cmd</constant> struct, so refer to the | ||
| 1142 | &VIDIOC-TRY-DECODER-CMD; documentation for more information.</para> | ||
| 1143 | </entry> | ||
| 1144 | </row></tbody></tgroup></informaltable> | ||
| 1145 | <para>SYNOPSIS | ||
| 1146 | </para> | ||
| 1147 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1148 | align="char"> | ||
| 1149 | <para>int ioctl(int fd, int request = | ||
| 1150 | VIDEO_TRY_COMMAND, struct video_command *cmd);</para> | ||
| 1151 | </entry> | ||
| 1152 | </row></tbody></tgroup></informaltable> | ||
| 1153 | <para>PARAMETERS | ||
| 1154 | </para> | ||
| 1155 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1156 | align="char"> | ||
| 1157 | <para>int fd</para> | ||
| 1158 | </entry><entry | ||
| 1159 | align="char"> | ||
| 1160 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1161 | </entry> | ||
| 1162 | </row><row><entry | ||
| 1163 | align="char"> | ||
| 1164 | <para>int request</para> | ||
| 1165 | </entry><entry | ||
| 1166 | align="char"> | ||
| 1167 | <para>Equals VIDEO_TRY_COMMAND for this | ||
| 1168 | command.</para> | ||
| 1169 | </entry> | ||
| 1170 | </row><row><entry | ||
| 1171 | align="char"> | ||
| 1172 | <para>struct video_command *cmd | ||
| 1173 | </para> | ||
| 1174 | </entry><entry | ||
| 1175 | align="char"> | ||
| 1176 | <para>Try a decoder command. | ||
| 1177 | </para> | ||
| 1178 | </entry> | ||
| 1179 | </row></tbody></tgroup></informaltable> | ||
| 1180 | &return-value-dvb; | ||
| 1181 | |||
| 1182 | </section><section id="VIDEO_GET_SIZE" | ||
| 1183 | role="subsection"><title>VIDEO_GET_SIZE</title> | ||
| 1184 | <para>DESCRIPTION | ||
| 1185 | </para> | ||
| 1186 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1187 | align="char"> | ||
| 1188 | <para>This ioctl returns the size and aspect ratio.</para> | ||
| 1189 | </entry> | ||
| 1190 | </row></tbody></tgroup></informaltable> | ||
| 1191 | <para>SYNOPSIS | ||
| 1192 | </para> | ||
| 1193 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1194 | align="char"> | ||
| 1195 | <para>int ioctl(int fd, int request = | ||
| 1196 | VIDEO_GET_SIZE, video_size_t *size);</para> | ||
| 1197 | </entry> | ||
| 1198 | </row></tbody></tgroup></informaltable> | ||
| 1199 | <para>PARAMETERS | ||
| 1200 | </para> | ||
| 1201 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1202 | align="char"> | ||
| 1203 | <para>int fd</para> | ||
| 1204 | </entry><entry | ||
| 1205 | align="char"> | ||
| 1206 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1207 | </entry> | ||
| 1208 | </row><row><entry | ||
| 1209 | align="char"> | ||
| 1210 | <para>int request</para> | ||
| 1211 | </entry><entry | ||
| 1212 | align="char"> | ||
| 1213 | <para>Equals VIDEO_GET_SIZE for this | ||
| 1214 | command.</para> | ||
| 1215 | </entry> | ||
| 1216 | </row><row><entry | ||
| 1217 | align="char"> | ||
| 1218 | <para>video_size_t *size | ||
| 1219 | </para> | ||
| 1220 | </entry><entry | ||
| 1221 | align="char"> | ||
| 1222 | <para>Returns the size and aspect ratio. | ||
| 1223 | </para> | ||
| 1224 | </entry> | ||
| 1225 | </row></tbody></tgroup></informaltable> | ||
| 1226 | &return-value-dvb; | ||
| 1227 | |||
| 1228 | </section><section id="VIDEO_SET_DISPLAY_FORMAT" | ||
| 1229 | role="subsection"><title>VIDEO_SET_DISPLAY_FORMAT</title> | ||
| 1230 | <para>DESCRIPTION | ||
| 1231 | </para> | ||
| 1232 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1233 | align="char"> | ||
| 1234 | <para>This ioctl call asks the Video Device to select the video format to be applied | ||
| 1235 | by the MPEG chip on the video.</para> | ||
| 1236 | </entry> | ||
| 1237 | </row></tbody></tgroup></informaltable> | ||
| 1238 | <para>SYNOPSIS | ||
| 1239 | </para> | ||
| 1240 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1241 | align="char"> | ||
| 1242 | <para> int ioctl(fd, int request = | ||
| 1243 | VIDEO_SET_DISPLAY_FORMAT, video_display_format_t | ||
| 1244 | format);</para> | ||
| 1245 | </entry> | ||
| 1246 | </row></tbody></tgroup></informaltable> | ||
| 1247 | <para>PARAMETERS | ||
| 1248 | </para> | ||
| 1249 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1250 | align="char"> | ||
| 1251 | <para>int fd</para> | ||
| 1252 | </entry><entry | ||
| 1253 | align="char"> | ||
| 1254 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1255 | </entry> | ||
| 1256 | </row><row><entry | ||
| 1257 | align="char"> | ||
| 1258 | <para>int request</para> | ||
| 1259 | </entry><entry | ||
| 1260 | align="char"> | ||
| 1261 | <para>Equals VIDEO_SET_DISPLAY_FORMAT for this | ||
| 1262 | command.</para> | ||
| 1263 | </entry> | ||
| 1264 | </row><row><entry | ||
| 1265 | align="char"> | ||
| 1266 | <para>video_display_format_t | ||
| 1267 | format</para> | ||
| 1268 | </entry><entry | ||
| 1269 | align="char"> | ||
| 1270 | <para>Selects the video format to be used.</para> | ||
| 1271 | </entry> | ||
| 1272 | </row></tbody></tgroup></informaltable> | ||
| 1273 | &return-value-dvb; | ||
| 1274 | |||
| 1275 | </section><section id="VIDEO_STILLPICTURE" | ||
| 1276 | role="subsection"><title>VIDEO_STILLPICTURE</title> | ||
| 1277 | <para>DESCRIPTION | ||
| 1278 | </para> | ||
| 1279 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1280 | align="char"> | ||
| 1281 | <para>This ioctl call asks the Video Device to display a still picture (I-frame). The | ||
| 1282 | input data shall contain an I-frame. If the pointer is NULL, then the current | ||
| 1283 | displayed still picture is blanked.</para> | ||
| 1284 | </entry> | ||
| 1285 | </row></tbody></tgroup></informaltable> | ||
| 1286 | <para>SYNOPSIS | ||
| 1287 | </para> | ||
| 1288 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1289 | align="char"> | ||
| 1290 | <para>int ioctl(fd, int request = VIDEO_STILLPICTURE, | ||
| 1291 | struct video_still_picture ⋆sp);</para> | ||
| 1292 | </entry> | ||
| 1293 | </row></tbody></tgroup></informaltable> | ||
| 1294 | <para>PARAMETERS | ||
| 1295 | </para> | ||
| 1296 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1297 | align="char"> | ||
| 1298 | <para>int fd</para> | ||
| 1299 | </entry><entry | ||
| 1300 | align="char"> | ||
| 1301 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1302 | </entry> | ||
| 1303 | </row><row><entry | ||
| 1304 | align="char"> | ||
| 1305 | <para>int request</para> | ||
| 1306 | </entry><entry | ||
| 1307 | align="char"> | ||
| 1308 | <para>Equals VIDEO_STILLPICTURE for this command.</para> | ||
| 1309 | </entry> | ||
| 1310 | </row><row><entry | ||
| 1311 | align="char"> | ||
| 1312 | <para>struct | ||
| 1313 | video_still_picture | ||
| 1314 | *sp</para> | ||
| 1315 | </entry><entry | ||
| 1316 | align="char"> | ||
| 1317 | <para>Pointer to a location where an I-frame and size is stored.</para> | ||
| 1318 | </entry> | ||
| 1319 | </row></tbody></tgroup></informaltable> | ||
| 1320 | &return-value-dvb; | ||
| 1321 | |||
| 1322 | </section><section id="VIDEO_FAST_FORWARD" | ||
| 1323 | role="subsection"><title>VIDEO_FAST_FORWARD</title> | ||
| 1324 | <para>DESCRIPTION | ||
| 1325 | </para> | ||
| 1326 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1327 | align="char"> | ||
| 1328 | <para>This ioctl call asks the Video Device to skip decoding of N number of I-frames. | ||
| 1329 | This call can only be used if VIDEO_SOURCE_MEMORY is selected.</para> | ||
| 1330 | </entry> | ||
| 1331 | </row></tbody></tgroup></informaltable> | ||
| 1332 | <para>SYNOPSIS | ||
| 1333 | </para> | ||
| 1334 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1335 | align="char"> | ||
| 1336 | <para>int ioctl(fd, int request = VIDEO_FAST_FORWARD, int | ||
| 1337 | nFrames);</para> | ||
| 1338 | </entry> | ||
| 1339 | </row></tbody></tgroup></informaltable> | ||
| 1340 | <para>PARAMETERS | ||
| 1341 | </para> | ||
| 1342 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1343 | align="char"> | ||
| 1344 | <para>int fd</para> | ||
| 1345 | </entry><entry | ||
| 1346 | align="char"> | ||
| 1347 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1348 | </entry> | ||
| 1349 | </row><row><entry | ||
| 1350 | align="char"> | ||
| 1351 | <para>int request</para> | ||
| 1352 | </entry><entry | ||
| 1353 | align="char"> | ||
| 1354 | <para>Equals VIDEO_FAST_FORWARD for this command.</para> | ||
| 1355 | </entry> | ||
| 1356 | </row><row><entry | ||
| 1357 | align="char"> | ||
| 1358 | <para>int nFrames</para> | ||
| 1359 | </entry><entry | ||
| 1360 | align="char"> | ||
| 1361 | <para>The number of frames to skip.</para> | ||
| 1362 | </entry> | ||
| 1363 | </row></tbody></tgroup></informaltable> | ||
| 1364 | &return-value-dvb; | ||
| 1365 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1366 | align="char"> | ||
| 1367 | <para>EPERM</para> | ||
| 1368 | </entry><entry | ||
| 1369 | align="char"> | ||
| 1370 | <para>Mode VIDEO_SOURCE_MEMORY not selected.</para> | ||
| 1371 | </entry> | ||
| 1372 | </row></tbody></tgroup></informaltable> | ||
| 1373 | |||
| 1374 | </section><section id="VIDEO_SLOWMOTION" | ||
| 1375 | role="subsection"><title>VIDEO_SLOWMOTION</title> | ||
| 1376 | <para>DESCRIPTION | ||
| 1377 | </para> | ||
| 1378 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1379 | align="char"> | ||
| 1380 | <para>This ioctl call asks the video device to repeat decoding frames N number of | ||
| 1381 | times. This call can only be used if VIDEO_SOURCE_MEMORY is selected.</para> | ||
| 1382 | </entry> | ||
| 1383 | </row></tbody></tgroup></informaltable> | ||
| 1384 | <para>SYNOPSIS | ||
| 1385 | </para> | ||
| 1386 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1387 | align="char"> | ||
| 1388 | <para>int ioctl(fd, int request = VIDEO_SLOWMOTION, int | ||
| 1389 | nFrames);</para> | ||
| 1390 | </entry> | ||
| 1391 | </row></tbody></tgroup></informaltable> | ||
| 1392 | <para>PARAMETERS | ||
| 1393 | </para> | ||
| 1394 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1395 | align="char"> | ||
| 1396 | <para>int fd</para> | ||
| 1397 | </entry><entry | ||
| 1398 | align="char"> | ||
| 1399 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1400 | </entry> | ||
| 1401 | </row><row><entry | ||
| 1402 | align="char"> | ||
| 1403 | <para>int request</para> | ||
| 1404 | </entry><entry | ||
| 1405 | align="char"> | ||
| 1406 | <para>Equals VIDEO_SLOWMOTION for this command.</para> | ||
| 1407 | </entry> | ||
| 1408 | </row><row><entry | ||
| 1409 | align="char"> | ||
| 1410 | <para>int nFrames</para> | ||
| 1411 | </entry><entry | ||
| 1412 | align="char"> | ||
| 1413 | <para>The number of times to repeat each frame.</para> | ||
| 1414 | </entry> | ||
| 1415 | </row></tbody></tgroup></informaltable> | ||
| 1416 | &return-value-dvb; | ||
| 1417 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1418 | align="char"> | ||
| 1419 | <para>EPERM</para> | ||
| 1420 | </entry><entry | ||
| 1421 | align="char"> | ||
| 1422 | <para>Mode VIDEO_SOURCE_MEMORY not selected.</para> | ||
| 1423 | </entry> | ||
| 1424 | </row></tbody></tgroup></informaltable> | ||
| 1425 | |||
| 1426 | </section><section id="VIDEO_GET_CAPABILITIES" | ||
| 1427 | role="subsection"><title>VIDEO_GET_CAPABILITIES</title> | ||
| 1428 | <para>DESCRIPTION | ||
| 1429 | </para> | ||
| 1430 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1431 | align="char"> | ||
| 1432 | <para>This ioctl call asks the video device about its decoding capabilities. On success | ||
| 1433 | it returns and integer which has bits set according to the defines in section ??.</para> | ||
| 1434 | </entry> | ||
| 1435 | </row></tbody></tgroup></informaltable> | ||
| 1436 | <para>SYNOPSIS | ||
| 1437 | </para> | ||
| 1438 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1439 | align="char"> | ||
| 1440 | <para>int ioctl(fd, int request = VIDEO_GET_CAPABILITIES, | ||
| 1441 | unsigned int ⋆cap);</para> | ||
| 1442 | </entry> | ||
| 1443 | </row></tbody></tgroup></informaltable> | ||
| 1444 | <para>PARAMETERS | ||
| 1445 | </para> | ||
| 1446 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1447 | align="char"> | ||
| 1448 | <para>int fd</para> | ||
| 1449 | </entry><entry | ||
| 1450 | align="char"> | ||
| 1451 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1452 | </entry> | ||
| 1453 | </row><row><entry | ||
| 1454 | align="char"> | ||
| 1455 | <para>int request</para> | ||
| 1456 | </entry><entry | ||
| 1457 | align="char"> | ||
| 1458 | <para>Equals VIDEO_GET_CAPABILITIES for this | ||
| 1459 | command.</para> | ||
| 1460 | </entry> | ||
| 1461 | </row><row><entry | ||
| 1462 | align="char"> | ||
| 1463 | <para>unsigned int *cap</para> | ||
| 1464 | </entry><entry | ||
| 1465 | align="char"> | ||
| 1466 | <para>Pointer to a location where to store the capability | ||
| 1467 | information.</para> | ||
| 1468 | </entry> | ||
| 1469 | </row></tbody></tgroup></informaltable> | ||
| 1470 | &return-value-dvb; | ||
| 1471 | |||
| 1472 | </section><section id="VIDEO_SET_ID" | ||
| 1473 | role="subsection"><title>VIDEO_SET_ID</title> | ||
| 1474 | <para>DESCRIPTION | ||
| 1475 | </para> | ||
| 1476 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1477 | align="char"> | ||
| 1478 | <para>This ioctl selects which sub-stream is to be decoded if a program or system | ||
| 1479 | stream is sent to the video device.</para> | ||
| 1480 | </entry> | ||
| 1481 | </row></tbody></tgroup></informaltable> | ||
| 1482 | <para>SYNOPSIS | ||
| 1483 | </para> | ||
| 1484 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1485 | align="char"> | ||
| 1486 | <para>int ioctl(int fd, int request = VIDEO_SET_ID, int | ||
| 1487 | id);</para> | ||
| 1488 | </entry> | ||
| 1489 | </row></tbody></tgroup></informaltable> | ||
| 1490 | <para>PARAMETERS | ||
| 1491 | </para> | ||
| 1492 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1493 | align="char"> | ||
| 1494 | <para>int fd</para> | ||
| 1495 | </entry><entry | ||
| 1496 | align="char"> | ||
| 1497 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1498 | </entry> | ||
| 1499 | </row><row><entry | ||
| 1500 | align="char"> | ||
| 1501 | <para>int request</para> | ||
| 1502 | </entry><entry | ||
| 1503 | align="char"> | ||
| 1504 | <para>Equals VIDEO_SET_ID for this command.</para> | ||
| 1505 | </entry> | ||
| 1506 | </row><row><entry | ||
| 1507 | align="char"> | ||
| 1508 | <para>int id</para> | ||
| 1509 | </entry><entry | ||
| 1510 | align="char"> | ||
| 1511 | <para>video sub-stream id</para> | ||
| 1512 | </entry> | ||
| 1513 | </row></tbody></tgroup></informaltable> | ||
| 1514 | &return-value-dvb; | ||
| 1515 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1516 | align="char"> | ||
| 1517 | <para>EINVAL</para> | ||
| 1518 | </entry><entry | ||
| 1519 | align="char"> | ||
| 1520 | <para>Invalid sub-stream id.</para> | ||
| 1521 | </entry> | ||
| 1522 | </row></tbody></tgroup></informaltable> | ||
| 1523 | |||
| 1524 | </section><section id="VIDEO_CLEAR_BUFFER" | ||
| 1525 | role="subsection"><title>VIDEO_CLEAR_BUFFER</title> | ||
| 1526 | <para>DESCRIPTION | ||
| 1527 | </para> | ||
| 1528 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1529 | align="char"> | ||
| 1530 | <para>This ioctl call clears all video buffers in the driver and in the decoder hardware.</para> | ||
| 1531 | </entry> | ||
| 1532 | </row></tbody></tgroup></informaltable> | ||
| 1533 | <para>SYNOPSIS | ||
| 1534 | </para> | ||
| 1535 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1536 | align="char"> | ||
| 1537 | <para>int ioctl(fd, int request = VIDEO_CLEAR_BUFFER);</para> | ||
| 1538 | </entry> | ||
| 1539 | </row></tbody></tgroup></informaltable> | ||
| 1540 | <para>PARAMETERS | ||
| 1541 | </para> | ||
| 1542 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1543 | align="char"> | ||
| 1544 | <para>int fd</para> | ||
| 1545 | </entry><entry | ||
| 1546 | align="char"> | ||
| 1547 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1548 | </entry> | ||
| 1549 | </row><row><entry | ||
| 1550 | align="char"> | ||
| 1551 | <para>int request</para> | ||
| 1552 | </entry><entry | ||
| 1553 | align="char"> | ||
| 1554 | <para>Equals VIDEO_CLEAR_BUFFER for this command.</para> | ||
| 1555 | </entry> | ||
| 1556 | </row></tbody></tgroup></informaltable> | ||
| 1557 | &return-value-dvb; | ||
| 1558 | |||
| 1559 | </section><section id="VIDEO_SET_STREAMTYPE" | ||
| 1560 | role="subsection"><title>VIDEO_SET_STREAMTYPE</title> | ||
| 1561 | <para>DESCRIPTION | ||
| 1562 | </para> | ||
| 1563 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1564 | align="char"> | ||
| 1565 | <para>This ioctl tells the driver which kind of stream to expect being written to it. If | ||
| 1566 | this call is not used the default of video PES is used. Some drivers might not | ||
| 1567 | support this call and always expect PES.</para> | ||
| 1568 | </entry> | ||
| 1569 | </row></tbody></tgroup></informaltable> | ||
| 1570 | <para>SYNOPSIS | ||
| 1571 | </para> | ||
| 1572 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1573 | align="char"> | ||
| 1574 | <para>int ioctl(fd, int request = VIDEO_SET_STREAMTYPE, | ||
| 1575 | int type);</para> | ||
| 1576 | </entry> | ||
| 1577 | </row></tbody></tgroup></informaltable> | ||
| 1578 | <para>PARAMETERS | ||
| 1579 | </para> | ||
| 1580 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1581 | align="char"> | ||
| 1582 | <para>int fd</para> | ||
| 1583 | </entry><entry | ||
| 1584 | align="char"> | ||
| 1585 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1586 | </entry> | ||
| 1587 | </row><row><entry | ||
| 1588 | align="char"> | ||
| 1589 | <para>int request</para> | ||
| 1590 | </entry><entry | ||
| 1591 | align="char"> | ||
| 1592 | <para>Equals VIDEO_SET_STREAMTYPE for this command.</para> | ||
| 1593 | </entry> | ||
| 1594 | </row><row><entry | ||
| 1595 | align="char"> | ||
| 1596 | <para>int type</para> | ||
| 1597 | </entry><entry | ||
| 1598 | align="char"> | ||
| 1599 | <para>stream type</para> | ||
| 1600 | </entry> | ||
| 1601 | </row></tbody></tgroup></informaltable> | ||
| 1602 | &return-value-dvb; | ||
| 1603 | |||
| 1604 | </section><section id="VIDEO_SET_FORMAT" | ||
| 1605 | role="subsection"><title>VIDEO_SET_FORMAT</title> | ||
| 1606 | <para>DESCRIPTION | ||
| 1607 | </para> | ||
| 1608 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1609 | align="char"> | ||
| 1610 | <para>This ioctl sets the screen format (aspect ratio) of the connected output device | ||
| 1611 | (TV) so that the output of the decoder can be adjusted accordingly.</para> | ||
| 1612 | </entry> | ||
| 1613 | </row></tbody></tgroup></informaltable> | ||
| 1614 | <para>SYNOPSIS | ||
| 1615 | </para> | ||
| 1616 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1617 | align="char"> | ||
| 1618 | <para> int ioctl(fd, int request = VIDEO_SET_FORMAT, | ||
| 1619 | video_format_t format);</para> | ||
| 1620 | </entry> | ||
| 1621 | </row></tbody></tgroup></informaltable> | ||
| 1622 | <para>PARAMETERS | ||
| 1623 | </para> | ||
| 1624 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1625 | align="char"> | ||
| 1626 | <para>int fd</para> | ||
| 1627 | </entry><entry | ||
| 1628 | align="char"> | ||
| 1629 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1630 | </entry> | ||
| 1631 | </row><row><entry | ||
| 1632 | align="char"> | ||
| 1633 | <para>int request</para> | ||
| 1634 | </entry><entry | ||
| 1635 | align="char"> | ||
| 1636 | <para>Equals VIDEO_SET_FORMAT for this command.</para> | ||
| 1637 | </entry> | ||
| 1638 | </row><row><entry | ||
| 1639 | align="char"> | ||
| 1640 | <para>video_format_t | ||
| 1641 | format</para> | ||
| 1642 | </entry><entry | ||
| 1643 | align="char"> | ||
| 1644 | <para>video format of TV as defined in section ??.</para> | ||
| 1645 | </entry> | ||
| 1646 | </row></tbody></tgroup></informaltable> | ||
| 1647 | &return-value-dvb; | ||
| 1648 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1649 | align="char"> | ||
| 1650 | <para>EINVAL</para> | ||
| 1651 | </entry><entry | ||
| 1652 | align="char"> | ||
| 1653 | <para>format is not a valid video format.</para> | ||
| 1654 | </entry> | ||
| 1655 | </row></tbody></tgroup></informaltable> | ||
| 1656 | |||
| 1657 | </section><section id="VIDEO_SET_SYSTEM" | ||
| 1658 | role="subsection"><title>VIDEO_SET_SYSTEM</title> | ||
| 1659 | <para>DESCRIPTION | ||
| 1660 | </para> | ||
| 1661 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1662 | align="char"> | ||
| 1663 | <para>This ioctl sets the television output format. The format (see section ??) may | ||
| 1664 | vary from the color format of the displayed MPEG stream. If the hardware is | ||
| 1665 | not able to display the requested format the call will return an error.</para> | ||
| 1666 | </entry> | ||
| 1667 | </row></tbody></tgroup></informaltable> | ||
| 1668 | <para>SYNOPSIS | ||
| 1669 | </para> | ||
| 1670 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1671 | align="char"> | ||
| 1672 | <para> int ioctl(fd, int request = VIDEO_SET_SYSTEM , | ||
| 1673 | video_system_t system);</para> | ||
| 1674 | </entry> | ||
| 1675 | </row></tbody></tgroup></informaltable> | ||
| 1676 | <para>PARAMETERS | ||
| 1677 | </para> | ||
| 1678 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1679 | align="char"> | ||
| 1680 | <para>int fd</para> | ||
| 1681 | </entry><entry | ||
| 1682 | align="char"> | ||
| 1683 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1684 | </entry> | ||
| 1685 | </row><row><entry | ||
| 1686 | align="char"> | ||
| 1687 | <para>int request</para> | ||
| 1688 | </entry><entry | ||
| 1689 | align="char"> | ||
| 1690 | <para>Equals VIDEO_SET_FORMAT for this command.</para> | ||
| 1691 | </entry> | ||
| 1692 | </row><row><entry | ||
| 1693 | align="char"> | ||
| 1694 | <para>video_system_t | ||
| 1695 | system</para> | ||
| 1696 | </entry><entry | ||
| 1697 | align="char"> | ||
| 1698 | <para>video system of TV output.</para> | ||
| 1699 | </entry> | ||
| 1700 | </row></tbody></tgroup></informaltable> | ||
| 1701 | &return-value-dvb; | ||
| 1702 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1703 | align="char"> | ||
| 1704 | <para>EINVAL</para> | ||
| 1705 | </entry><entry | ||
| 1706 | align="char"> | ||
| 1707 | <para>system is not a valid or supported video system.</para> | ||
| 1708 | </entry> | ||
| 1709 | </row></tbody></tgroup></informaltable> | ||
| 1710 | |||
| 1711 | </section><section id="VIDEO_SET_HIGHLIGHT" | ||
| 1712 | role="subsection"><title>VIDEO_SET_HIGHLIGHT</title> | ||
| 1713 | <para>DESCRIPTION | ||
| 1714 | </para> | ||
| 1715 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1716 | align="char"> | ||
| 1717 | <para>This ioctl sets the SPU highlight information for the menu access of a DVD.</para> | ||
| 1718 | </entry> | ||
| 1719 | </row></tbody></tgroup></informaltable> | ||
| 1720 | <para>SYNOPSIS | ||
| 1721 | </para> | ||
| 1722 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1723 | align="char"> | ||
| 1724 | <para> int ioctl(fd, int request = VIDEO_SET_HIGHLIGHT | ||
| 1725 | ,video_highlight_t ⋆vhilite)</para> | ||
| 1726 | </entry> | ||
| 1727 | </row></tbody></tgroup></informaltable> | ||
| 1728 | <para>PARAMETERS | ||
| 1729 | </para> | ||
| 1730 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1731 | align="char"> | ||
| 1732 | <para>int fd</para> | ||
| 1733 | </entry><entry | ||
| 1734 | align="char"> | ||
| 1735 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1736 | </entry> | ||
| 1737 | </row><row><entry | ||
| 1738 | align="char"> | ||
| 1739 | <para>int request</para> | ||
| 1740 | </entry><entry | ||
| 1741 | align="char"> | ||
| 1742 | <para>Equals VIDEO_SET_HIGHLIGHT for this command.</para> | ||
| 1743 | </entry> | ||
| 1744 | </row><row><entry | ||
| 1745 | align="char"> | ||
| 1746 | <para>video_highlight_t | ||
| 1747 | *vhilite</para> | ||
| 1748 | </entry><entry | ||
| 1749 | align="char"> | ||
| 1750 | <para>SPU Highlight information according to section ??.</para> | ||
| 1751 | </entry> | ||
| 1752 | </row></tbody></tgroup></informaltable> | ||
| 1753 | &return-value-dvb; | ||
| 1754 | |||
| 1755 | </section><section id="VIDEO_SET_SPU" | ||
| 1756 | role="subsection"><title>VIDEO_SET_SPU</title> | ||
| 1757 | <para>DESCRIPTION | ||
| 1758 | </para> | ||
| 1759 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1760 | align="char"> | ||
| 1761 | <para>This ioctl activates or deactivates SPU decoding in a DVD input stream. It can | ||
| 1762 | only be used, if the driver is able to handle a DVD stream.</para> | ||
| 1763 | </entry> | ||
| 1764 | </row></tbody></tgroup></informaltable> | ||
| 1765 | <para>SYNOPSIS | ||
| 1766 | </para> | ||
| 1767 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1768 | align="char"> | ||
| 1769 | <para> int ioctl(fd, int request = VIDEO_SET_SPU , | ||
| 1770 | video_spu_t ⋆spu)</para> | ||
| 1771 | </entry> | ||
| 1772 | </row></tbody></tgroup></informaltable> | ||
| 1773 | <para>PARAMETERS | ||
| 1774 | </para> | ||
| 1775 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1776 | align="char"> | ||
| 1777 | <para>int fd</para> | ||
| 1778 | </entry><entry | ||
| 1779 | align="char"> | ||
| 1780 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1781 | </entry> | ||
| 1782 | </row><row><entry | ||
| 1783 | align="char"> | ||
| 1784 | <para>int request</para> | ||
| 1785 | </entry><entry | ||
| 1786 | align="char"> | ||
| 1787 | <para>Equals VIDEO_SET_SPU for this command.</para> | ||
| 1788 | </entry> | ||
| 1789 | </row><row><entry | ||
| 1790 | align="char"> | ||
| 1791 | <para>video_spu_t *spu</para> | ||
| 1792 | </entry><entry | ||
| 1793 | align="char"> | ||
| 1794 | <para>SPU decoding (de)activation and subid setting according | ||
| 1795 | to section ??.</para> | ||
| 1796 | </entry> | ||
| 1797 | </row></tbody></tgroup></informaltable> | ||
| 1798 | &return-value-dvb; | ||
| 1799 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1800 | align="char"> | ||
| 1801 | <para>EINVAL</para> | ||
| 1802 | </entry><entry | ||
| 1803 | align="char"> | ||
| 1804 | <para>input is not a valid spu setting or driver cannot handle | ||
| 1805 | SPU.</para> | ||
| 1806 | </entry> | ||
| 1807 | </row></tbody></tgroup></informaltable> | ||
| 1808 | |||
| 1809 | </section><section id="VIDEO_SET_SPU_PALETTE" | ||
| 1810 | role="subsection"><title>VIDEO_SET_SPU_PALETTE</title> | ||
| 1811 | <para>DESCRIPTION | ||
| 1812 | </para> | ||
| 1813 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1814 | align="char"> | ||
| 1815 | <para>This ioctl sets the SPU color palette.</para> | ||
| 1816 | </entry> | ||
| 1817 | </row></tbody></tgroup></informaltable> | ||
| 1818 | <para>SYNOPSIS | ||
| 1819 | </para> | ||
| 1820 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1821 | align="char"> | ||
| 1822 | <para> int ioctl(fd, int request = VIDEO_SET_SPU_PALETTE | ||
| 1823 | ,video_spu_palette_t ⋆palette )</para> | ||
| 1824 | </entry> | ||
| 1825 | </row></tbody></tgroup></informaltable> | ||
| 1826 | <para>PARAMETERS | ||
| 1827 | </para> | ||
| 1828 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1829 | align="char"> | ||
| 1830 | <para>int fd</para> | ||
| 1831 | </entry><entry | ||
| 1832 | align="char"> | ||
| 1833 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1834 | </entry> | ||
| 1835 | </row><row><entry | ||
| 1836 | align="char"> | ||
| 1837 | <para>int request</para> | ||
| 1838 | </entry><entry | ||
| 1839 | align="char"> | ||
| 1840 | <para>Equals VIDEO_SET_SPU_PALETTE for this command.</para> | ||
| 1841 | </entry> | ||
| 1842 | </row><row><entry | ||
| 1843 | align="char"> | ||
| 1844 | <para>video_spu_palette_t | ||
| 1845 | *palette</para> | ||
| 1846 | </entry><entry | ||
| 1847 | align="char"> | ||
| 1848 | <para>SPU palette according to section ??.</para> | ||
| 1849 | </entry> | ||
| 1850 | </row></tbody></tgroup></informaltable> | ||
| 1851 | &return-value-dvb; | ||
| 1852 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1853 | align="char"> | ||
| 1854 | <para>EINVAL</para> | ||
| 1855 | </entry><entry | ||
| 1856 | align="char"> | ||
| 1857 | <para>input is not a valid palette or driver doesn’t handle SPU.</para> | ||
| 1858 | </entry> | ||
| 1859 | </row></tbody></tgroup></informaltable> | ||
| 1860 | |||
| 1861 | </section><section id="VIDEO_GET_NAVI" | ||
| 1862 | role="subsection"><title>VIDEO_GET_NAVI</title> | ||
| 1863 | <para>DESCRIPTION | ||
| 1864 | </para> | ||
| 1865 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1866 | align="char"> | ||
| 1867 | <para>This ioctl returns navigational information from the DVD stream. This is | ||
| 1868 | especially needed if an encoded stream has to be decoded by the hardware.</para> | ||
| 1869 | </entry> | ||
| 1870 | </row></tbody></tgroup></informaltable> | ||
| 1871 | <para>SYNOPSIS | ||
| 1872 | </para> | ||
| 1873 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1874 | align="char"> | ||
| 1875 | <para> int ioctl(fd, int request = VIDEO_GET_NAVI , | ||
| 1876 | video_navi_pack_t ⋆navipack)</para> | ||
| 1877 | </entry> | ||
| 1878 | </row></tbody></tgroup></informaltable> | ||
| 1879 | <para>PARAMETERS | ||
| 1880 | </para> | ||
| 1881 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1882 | align="char"> | ||
| 1883 | <para>int fd</para> | ||
| 1884 | </entry><entry | ||
| 1885 | align="char"> | ||
| 1886 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1887 | </entry> | ||
| 1888 | </row><row><entry | ||
| 1889 | align="char"> | ||
| 1890 | <para>int request</para> | ||
| 1891 | </entry><entry | ||
| 1892 | align="char"> | ||
| 1893 | <para>Equals VIDEO_GET_NAVI for this command.</para> | ||
| 1894 | </entry> | ||
| 1895 | </row><row><entry | ||
| 1896 | align="char"> | ||
| 1897 | <para>video_navi_pack_t | ||
| 1898 | *navipack</para> | ||
| 1899 | </entry><entry | ||
| 1900 | align="char"> | ||
| 1901 | <para>PCI or DSI pack (private stream 2) according to section | ||
| 1902 | ??.</para> | ||
| 1903 | </entry> | ||
| 1904 | </row></tbody></tgroup></informaltable> | ||
| 1905 | &return-value-dvb; | ||
| 1906 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1907 | align="char"> | ||
| 1908 | <para>EFAULT</para> | ||
| 1909 | </entry><entry | ||
| 1910 | align="char"> | ||
| 1911 | <para>driver is not able to return navigational information</para> | ||
| 1912 | </entry> | ||
| 1913 | </row></tbody></tgroup></informaltable> | ||
| 1914 | |||
| 1915 | </section><section id="VIDEO_SET_ATTRIBUTES" | ||
| 1916 | role="subsection"><title>VIDEO_SET_ATTRIBUTES</title> | ||
| 1917 | <para>DESCRIPTION | ||
| 1918 | </para> | ||
| 1919 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1920 | align="char"> | ||
| 1921 | <para>This ioctl is intended for DVD playback and allows you to set certain | ||
| 1922 | information about the stream. Some hardware may not need this information, | ||
| 1923 | but the call also tells the hardware to prepare for DVD playback.</para> | ||
| 1924 | </entry> | ||
| 1925 | </row></tbody></tgroup></informaltable> | ||
| 1926 | <para>SYNOPSIS | ||
| 1927 | </para> | ||
| 1928 | <informaltable><tgroup cols="1"><tbody><row><entry | ||
| 1929 | align="char"> | ||
| 1930 | <para> int ioctl(fd, int request = VIDEO_SET_ATTRIBUTE | ||
| 1931 | ,video_attributes_t vattr)</para> | ||
| 1932 | </entry> | ||
| 1933 | </row></tbody></tgroup></informaltable> | ||
| 1934 | <para>PARAMETERS | ||
| 1935 | </para> | ||
| 1936 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1937 | align="char"> | ||
| 1938 | <para>int fd</para> | ||
| 1939 | </entry><entry | ||
| 1940 | align="char"> | ||
| 1941 | <para>File descriptor returned by a previous call to open().</para> | ||
| 1942 | </entry> | ||
| 1943 | </row><row><entry | ||
| 1944 | align="char"> | ||
| 1945 | <para>int request</para> | ||
| 1946 | </entry><entry | ||
| 1947 | align="char"> | ||
| 1948 | <para>Equals VIDEO_SET_ATTRIBUTE for this command.</para> | ||
| 1949 | </entry> | ||
| 1950 | </row><row><entry | ||
| 1951 | align="char"> | ||
| 1952 | <para>video_attributes_t | ||
| 1953 | vattr</para> | ||
| 1954 | </entry><entry | ||
| 1955 | align="char"> | ||
| 1956 | <para>video attributes according to section ??.</para> | ||
| 1957 | </entry> | ||
| 1958 | </row></tbody></tgroup></informaltable> | ||
| 1959 | &return-value-dvb; | ||
| 1960 | <informaltable><tgroup cols="2"><tbody><row><entry | ||
| 1961 | align="char"> | ||
| 1962 | <para>EINVAL</para> | ||
| 1963 | </entry><entry | ||
| 1964 | align="char"> | ||
| 1965 | <para>input is not a valid attribute setting.</para> | ||
| 1966 | </entry> | ||
| 1967 | </row></tbody></tgroup></informaltable> | ||
| 1968 | </section></section> | ||
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| @@ -1,37 +0,0 @@ | |||
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| 6 | 1//fnPPd3fTe3vXj4vfo6Pnu7r////v09N////35+f//v///3/////////////////////////// | ||
| 7 | /////////////////////////////////////////////////////////////////////////yH+ | ||
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| @@ -1,121 +0,0 @@ | |||
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| 10 | 3fTe3vXj4vfo6L//v+/v7/nu7r///9//v/v09N//39////35+f//v///3/////////////////// | ||
| 11 | //////////////////////////////////////////////////////////////////////////// | ||
| 12 | //////////////////////////////////////////////////////////////////////////// | ||
| 13 | //////////////////////////////////////////////////////////////////////////// | ||
| 14 | /////////////////////////////////////////////////////yH+EUNyZWF0ZWQgd2l0aCBH | ||
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| 2 | <svg stroke-linejoin="round" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" clip-path="url(#a)" xml:space="preserve" fill-rule="evenodd" height="178.78mm" viewBox="0 0 24285.662 17877.829" width="251.99mm" version="1.2" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" preserveAspectRatio="xMidYMid" stroke-width="28.222"><defs><clipPath id="a" clipPathUnits="userSpaceOnUse"><rect y="0" x="0" width="28000" height="21000"/></clipPath></defs><g transform="matrix(1.004 0 0 1 -2185.6 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#fcf" d="m12231 4800c-516 0-1031 515-1031 1031v4124c0 516 515 1032 1031 1032h8538c516 0 1032-516 1032-1032v-4124c0-516-516-1031-1032-1031h-8538z"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#ffc" d="m3595 15607c-293 0-585 292-585 585v2340c0 293 292 586 585 586h3275c293 0 586-293 586-586v-2340c0-293-293-585-586-585h-3275z"/></g><g transform="translate(-2197.3 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#e6e6e6" d="m2663 2186c-461 0-922 461-922 922v11169c0 461 461 923 922 923h3692c461 0 922-462 922-923v-11169c0-461-461-922-922-922h-3692z"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.RectangleShape"><path fill="#ff8080" d="m4461 8602h-2260v-1086h4520v1086h-2260z"/><path fill="none" d="m4461 8602h-2260v-1086h4520v1086h-2260z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="8275" x="2579" class="TextPosition"><tspan fill="#000000">Audio decoder</tspan></tspan></tspan></text> | ||
| 3 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.RectangleShape"><path fill="#ff8080" d="m4461 11772h-2260v-1270h4520v1270h-2260z"/><path fill="none" d="m4461 11772h-2260v-1270h4520v1270h-2260z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="11353" x="2617" class="TextPosition"><tspan fill="#000000">Video decoder</tspan></tspan></tspan></text> | ||
| 4 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.RectangleShape"><path fill="#ff8080" d="m4453 10217h-2269v-1224h4537v1224h-2268z"/><path fill="none" d="m4453 10217h-2269v-1224h4537v1224h-2268z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="9821" x="2571" class="TextPosition"><tspan fill="#000000">Audio encoder</tspan></tspan></tspan></text> | ||
| 5 | </g><g transform="translate(-2140.9 -2468.2)" class="com.sun.star.drawing.RectangleShape"><path fill="#cfc" d="m15711 12832h-3810v-1281h7620v1281h-3810z"/><path fill="none" d="m15711 12832h-3810v-1281h7620v1281h-3810z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="12407" x="12377" class="TextPosition"><tspan fill="#000000">Button Key/IR input logic</tspan></tspan></tspan></text> | ||
| 6 | </g><g transform="translate(-2140.9 -2411.8)" class="com.sun.star.drawing.RectangleShape"><path fill="#cfe7f5" d="m14169 14572h-2268v-1412h4536v1412h-2268z"/><path fill="none" d="m14169 14572h-2268v-1412h4536v1412h-2268z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="14082" x="12882" class="TextPosition"><tspan fill="#000000">EEPROM</tspan></tspan></tspan></text> | ||
| 7 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.RectangleShape"><path fill="#fc9" d="m5140 17662h-1563v-1715h3126v1715h-1563z"/><path fill="none" d="m5140 17662h-1563v-1715h3126v1715h-1563z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="17020" x="4276" class="TextPosition"><tspan fill="#000000">Sensor</tspan></tspan></tspan></text> | ||
| 8 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m6719 8030 385-353v176h1167v-176l386 353-386 354v-177h-1167v177l-385-354z"/><path fill="none" d="m6719 8030 385-353v176h1167v-176l386 353-386 354v-177h-1167v177l-385-354z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m6719 9612 385-353v176h1167v-176l386 353-386 354v-177h-1167v177l-385-354z"/><path fill="none" d="m6719 9612 385-353v176h1167v-176l386 353-386 354v-177h-1167v177l-385-354z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m6721 11100 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z"/><path fill="none" d="m6721 11100 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2411.8)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m9962 13854 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z"/><path fill="none" d="m9962 13854 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2468.2)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m9962 12163 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z"/><path fill="none" d="m9962 12163 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m9962 17158 670-353v176h2028v-176l671 353-671 354v-177h-2028v177l-670-354z"/><path fill="none" d="m9962 17158 670-353v176h2028v-176l671 353-671 354v-177h-2028v177l-670-354z" stroke="#3465af"/></g><g transform="matrix(0 .83339 -1.0005 0 30268 -5276.3)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m23229 12779 1009-978 1009 978h-505v2959h505l-1009 979-1009-979h504v-2959h-504z"/><path fill="none" d="m23229 12779 1009-978 1009 978h-505v2959h505l-1009 979-1009-979h504v-2959h-504z" stroke="#3465af"/></g><g transform="translate(-9973.6 -666.6)" class="com.sun.star.drawing.TextShape"><text class="TextShape"><tspan font-size="706px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="15832" x="24341" class="TextPosition" transform="matrix(0,-1,1,0,8509,40173)"><tspan fill="#000000">System Bus</tspan></tspan></tspan></text> | ||
| 9 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.RectangleShape"><path fill="#cff" d="m13151 9262h-1250v-875h2499v875h-1249z"/><path fill="none" d="m13151 9262h-1250v-875h2499v875h-1249z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="9040" x="12215" class="TextPosition"><tspan fill="#000000">Demux</tspan></tspan></tspan></text> | ||
| 10 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m9996 8765 373-357v178h1130v-178l374 357-374 358v-179h-1130v179l-373-358z"/><path fill="none" d="m9996 8765 373-357v178h1130v-178l374 357-374 358v-179h-1130v179l-373-358z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m9996 7378 373-358v179h1130v-179l374 358-374 358v-179h-1130v179l-373-358z"/><path fill="none" d="m9996 7378 373-358v179h1130v-179l374 358-374 358v-179h-1130v179l-373-358z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.RectangleShape"><path fill="#cff" d="m16322 7992h-4421v-1270h8841v1270h-4420z"/><path fill="none" d="m16322 7992h-4421v-1270h8841v1270h-4420z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="7573" x="12786" class="TextPosition"><tspan fill="#000000">Conditional Access Module</tspan></tspan></tspan></text> | ||
| 11 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.RectangleShape"><path fill="#ff8080" d="m4445 13287h-2269v-1224h4537v1224h-2268z"/><path fill="none" d="m4445 13287h-2269v-1224h4537v1224h-2268z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="12891" x="2601" class="TextPosition"><tspan fill="#000000">Video encoder</tspan></tspan></tspan></text> | ||
| 12 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m6721 12634 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z"/><path fill="none" d="m6721 12634 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m20791 7545 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z"/><path fill="none" d="m20791 7545 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z" stroke="#3465af"/></g><g transform="translate(-2028 -2186)" class="com.sun.star.drawing.TextShape"><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="14478" x="1990" class="TextPosition"><tspan fill="#000000">Radio / Analog TV</tspan></tspan></tspan></text> | ||
| 13 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.TextShape"><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="700" class="TextParagraph"><tspan y="10724" x="14956" class="TextPosition"><tspan fill="#000000">Digital TV</tspan></tspan></tspan></text> | ||
| 14 | </g><g transform="translate(-8970.5 -1395.8)" class="com.sun.star.drawing.TextShape"><text class="TextShape"><tspan font-size="494px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="19167" x="14724" class="TextPosition"><tspan fill="#000000">PS.: picture is not complete: other blocks may be present</tspan></tspan></tspan></text> | ||
| 15 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.TextShape"><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="18561" x="4199" class="TextPosition"><tspan fill="#000000">Webcam</tspan></tspan></tspan></text> | ||
| 16 | </g><g transform="translate(-2140.9 -2468.2)" class="com.sun.star.drawing.RectangleShape"><path fill="#f90" d="m14552 16372h-2650v-1412h5299v1412h-2649z"/><path fill="none" d="m14552 16372h-2650v-1412h5299v1412h-2649z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="15882" x="12265" class="TextPosition"><tspan fill="#000000">Processing blocks</tspan></tspan></tspan></text> | ||
| 17 | </g><g transform="translate(-2140.9 -2468.2)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m9962 15654 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z"/><path fill="none" d="m9962 15654 385-353v176h1166v-176l386 353-386 354v-177h-1166v177l-385-354z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m6702 16954 397-353v176h1201v-176l398 353-398 354v-177h-1201v177l-397-354z"/><path fill="none" d="m6702 16954 397-353v176h1201v-176l398 353-398 354v-177h-1201v177l-397-354z" stroke="#3465af"/></g><g transform="translate(-2479.5 -2186)" class="com.sun.star.drawing.TextShape"><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="8792" x="22850" class="TextPosition"><tspan fill="#000000">Smartcard</tspan></tspan></tspan></text> | ||
| 18 | </g><g transform="matrix(1.0048 0 0 1 -2207.4 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#fcf" d="m2766 2600c-333 0-666 333-666 666v2668c0 333 333 666 666 666h18368c333 0 667-333 667-666v-2668c0-333-334-666-667-666h-18368z"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.RectangleShape"><path fill="#ff8080" d="m5121 5155h-1614v-1816h3227v1816h-1613z"/><path fill="none" d="m5121 5155h-1614v-1816h3227v1816h-1613z" stroke="#3465af"/><text font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextShape"><tspan class="TextParagraph"><tspan y="4111" x="4374" class="TextPosition"><tspan fill="#000000">Tuner</tspan></tspan></tspan><tspan class="TextParagraph"><tspan y="4814" x="4151" class="TextPosition"><tspan fill="#000000">FM/TV</tspan></tspan></tspan></text> | ||
| 19 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#ff8080" d="m2902 3702c0 111 40 202 88 202h530c48 0 89-91 89-202 0-110-41-202-89-202h-530c-48 0-88 92-88 202z"/><path fill="none" d="m2902 3702c0 111 40 202 88 202h530c48 0 89-91 89-202 0-110-41-202-89-202h-530c-48 0-88 92-88 202z" stroke="#3465af"/><path fill="#ffb3b3" d="m2902 3702c0 111 40 202 88 202s88-91 88-202c0-110-40-202-88-202s-88 92-88 202z"/><path fill="none" d="m2902 3702c0 111 40 202 88 202s88-91 88-202c0-110-40-202-88-202s-88 92-88 202z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#ff8080" d="m2903 4267c0 110 40 202 88 202h530c48 0 89-92 89-202s-41-203-89-203h-530c-48 0-88 93-88 203z"/><path fill="none" d="m2903 4267c0 110 40 202 88 202h530c48 0 89-92 89-202s-41-203-89-203h-530c-48 0-88 93-88 203z" stroke="#3465af"/><path fill="#ffb3b3" d="m2903 4267c0 110 40 202 88 202s88-92 88-202-40-203-88-203-88 93-88 203z"/><path fill="none" d="m2903 4267c0 110 40 202 88 202s88-92 88-202-40-203-88-203-88 93-88 203z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m6719 4196 385-353v176h1167v-176l386 353-386 354v-177h-1167v177l-385-354z"/><path fill="none" d="m6719 4196 385-353v176h1167v-176l386 353-386 354v-177h-1167v177l-385-354z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m9979 4150 402-368v184h1217v-184l403 368-403 369v-185h-1217v185l-402-369z"/><path fill="none" d="m9979 4150 402-368v184h1217v-184l403 368-403 369v-185h-1217v185l-402-369z" stroke="#3465af"/></g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.RectangleShape"><path fill="#cff" d="m16500 6189h-4500v-1389h9e3v1389h-4500z"/><path fill="none" d="m16500 6189h-4500v-1389h9e3v1389h-4500z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="5710" x="12051" class="TextPosition"><tspan fill="#000000">Satellite Equipment Control (SEC)</tspan></tspan></tspan></text> | ||
| 20 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#cff" d="m13400 4600h-1400v-1e3h2800v1e3h-1400z"/><path fill="none" d="m13400 4600h-1400v-1e3h2800v1e3h-1400z" stroke="#3465af"/><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="4316" x="12465" class="TextPosition"><tspan fill="#000000">Demod</tspan></tspan></tspan></text> | ||
| 21 | </g><g transform="translate(-2140.9 -2186)" class="com.sun.star.drawing.CustomShape"><path fill="#729fcf" d="m9979 5451 402-368v184h1217v-184l403 368-403 369v-185h-1217v185l-402-369z"/><path fill="none" d="m9979 5451 402-368v184h1217v-184l403 368-403 369v-185h-1217v185l-402-369z" stroke="#3465af"/></g><path fill="#ff9" d="m7855.1 9099v7302h-1270v-14605h1270v7303z"/><path fill="none" d="m7855.1 9099v7302h-1270v-14605h1270v7303z" stroke="#3465af"/><text y="-6640.4663" x="-20770.572" transform="rotate(-90)" class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="7409.5396" x="-11193.634" class="TextPosition" transform="matrix(0,-1,1,0,-4473,23627)"><tspan fill="#000000">I2C Bus (control bus)</tspan></tspan></tspan></text> | ||
| 22 | <g transform="translate(-2197.3 -2186)" class="com.sun.star.drawing.TextShape"><text class="TextShape"><tspan font-size="635px" font-family="'Times New Roman', serif" font-weight="400" class="TextParagraph"><tspan y="3278" x="9391" class="TextPosition"><tspan fill="#000000">Digital TV Frontend</tspan></tspan></tspan></text> | ||
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| 1 | !*.xml | ||
| @@ -1,381 +0,0 @@ | |||
| 1 | <bibliography> | ||
| 2 | <title>References</title> | ||
| 3 | |||
| 4 | <biblioentry id="cea608"> | ||
| 5 | <abbrev>CEA 608-E</abbrev> | ||
| 6 | <authorgroup> | ||
| 7 | <corpauthor>Consumer Electronics Association (<ulink | ||
| 8 | url="http://www.ce.org">http://www.ce.org</ulink>)</corpauthor> | ||
| 9 | </authorgroup> | ||
| 10 | <title>CEA-608-E R-2014 "Line 21 Data Services"</title> | ||
| 11 | </biblioentry> | ||
| 12 | |||
| 13 | <biblioentry id="en300294"> | ||
| 14 | <abbrev>EN 300 294</abbrev> | ||
| 15 | <authorgroup> | ||
| 16 | <corpauthor>European Telecommunication Standards Institute | ||
| 17 | (<ulink url="http://www.etsi.org">http://www.etsi.org</ulink>)</corpauthor> | ||
| 18 | </authorgroup> | ||
| 19 | <title>EN 300 294 "625-line television Wide Screen Signalling | ||
| 20 | (WSS)"</title> | ||
| 21 | </biblioentry> | ||
| 22 | |||
| 23 | <biblioentry id="ets300231"> | ||
| 24 | <abbrev>ETS 300 231</abbrev> | ||
| 25 | <authorgroup> | ||
| 26 | <corpauthor>European Telecommunication Standards Institute | ||
| 27 | (<ulink | ||
| 28 | url="http://www.etsi.org">http://www.etsi.org</ulink>)</corpauthor> | ||
| 29 | </authorgroup> | ||
| 30 | <title>ETS 300 231 "Specification of the domestic video | ||
| 31 | Programme Delivery Control system (PDC)"</title> | ||
| 32 | </biblioentry> | ||
| 33 | |||
| 34 | <biblioentry id="ets300706"> | ||
| 35 | <abbrev>ETS 300 706</abbrev> | ||
| 36 | <authorgroup> | ||
| 37 | <corpauthor>European Telecommunication Standards Institute | ||
| 38 | (<ulink url="http://www.etsi.org">http://www.etsi.org</ulink>)</corpauthor> | ||
| 39 | </authorgroup> | ||
| 40 | <title>ETS 300 706 "Enhanced Teletext specification"</title> | ||
| 41 | </biblioentry> | ||
| 42 | |||
| 43 | <biblioentry id="mpeg2part1"> | ||
| 44 | <abbrev>ISO 13818-1</abbrev> | ||
| 45 | <authorgroup> | ||
| 46 | <corpauthor>International Telecommunication Union (<ulink | ||
| 47 | url="http://www.itu.ch">http://www.itu.ch</ulink>), International | ||
| 48 | Organisation for Standardisation (<ulink | ||
| 49 | url="http://www.iso.ch">http://www.iso.ch</ulink>)</corpauthor> | ||
| 50 | </authorgroup> | ||
| 51 | <title>ITU-T Rec. H.222.0 | ISO/IEC 13818-1 "Information | ||
| 52 | technology — Generic coding of moving pictures and associated | ||
| 53 | audio information: Systems"</title> | ||
| 54 | </biblioentry> | ||
| 55 | |||
| 56 | <biblioentry id="mpeg2part2"> | ||
| 57 | <abbrev>ISO 13818-2</abbrev> | ||
| 58 | <authorgroup> | ||
| 59 | <corpauthor>International Telecommunication Union (<ulink | ||
| 60 | url="http://www.itu.ch">http://www.itu.ch</ulink>), International | ||
| 61 | Organisation for Standardisation (<ulink | ||
| 62 | url="http://www.iso.ch">http://www.iso.ch</ulink>)</corpauthor> | ||
| 63 | </authorgroup> | ||
| 64 | <title>ITU-T Rec. H.262 | ISO/IEC 13818-2 "Information | ||
| 65 | technology — Generic coding of moving pictures and associated | ||
| 66 | audio information: Video"</title> | ||
| 67 | </biblioentry> | ||
| 68 | |||
| 69 | <biblioentry id="itu470"> | ||
| 70 | <abbrev>ITU BT.470</abbrev> | ||
| 71 | <authorgroup> | ||
| 72 | <corpauthor>International Telecommunication Union (<ulink | ||
| 73 | url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor> | ||
| 74 | </authorgroup> | ||
| 75 | <title>ITU-R Recommendation BT.470-6 "Conventional Television | ||
| 76 | Systems"</title> | ||
| 77 | </biblioentry> | ||
| 78 | |||
| 79 | <biblioentry id="itu601"> | ||
| 80 | <abbrev>ITU BT.601</abbrev> | ||
| 81 | <authorgroup> | ||
| 82 | <corpauthor>International Telecommunication Union (<ulink | ||
| 83 | url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor> | ||
| 84 | </authorgroup> | ||
| 85 | <title>ITU-R Recommendation BT.601-5 "Studio Encoding Parameters | ||
| 86 | of Digital Television for Standard 4:3 and Wide-Screen 16:9 Aspect | ||
| 87 | Ratios"</title> | ||
| 88 | </biblioentry> | ||
| 89 | |||
| 90 | <biblioentry id="itu653"> | ||
| 91 | <abbrev>ITU BT.653</abbrev> | ||
| 92 | <authorgroup> | ||
| 93 | <corpauthor>International Telecommunication Union (<ulink | ||
| 94 | url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor> | ||
| 95 | </authorgroup> | ||
| 96 | <title>ITU-R Recommendation BT.653-3 "Teletext systems"</title> | ||
| 97 | </biblioentry> | ||
| 98 | |||
| 99 | <biblioentry id="itu709"> | ||
| 100 | <abbrev>ITU BT.709</abbrev> | ||
| 101 | <authorgroup> | ||
| 102 | <corpauthor>International Telecommunication Union (<ulink | ||
| 103 | url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor> | ||
| 104 | </authorgroup> | ||
| 105 | <title>ITU-R Recommendation BT.709-5 "Parameter values for the | ||
| 106 | HDTV standards for production and international programme | ||
| 107 | exchange"</title> | ||
| 108 | </biblioentry> | ||
| 109 | |||
| 110 | <biblioentry id="itu1119"> | ||
| 111 | <abbrev>ITU BT.1119</abbrev> | ||
| 112 | <authorgroup> | ||
| 113 | <corpauthor>International Telecommunication Union (<ulink | ||
| 114 | url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor> | ||
| 115 | </authorgroup> | ||
| 116 | <title>ITU-R Recommendation BT.1119 "625-line | ||
| 117 | television Wide Screen Signalling (WSS)"</title> | ||
| 118 | </biblioentry> | ||
| 119 | |||
| 120 | <biblioentry id="jfif"> | ||
| 121 | <abbrev>JFIF</abbrev> | ||
| 122 | <authorgroup> | ||
| 123 | <corpauthor>Independent JPEG Group (<ulink | ||
| 124 | url="http://www.ijg.org">http://www.ijg.org</ulink>)</corpauthor> | ||
| 125 | </authorgroup> | ||
| 126 | <title>JPEG File Interchange Format</title> | ||
| 127 | <subtitle>Version 1.02</subtitle> | ||
| 128 | </biblioentry> | ||
| 129 | |||
| 130 | <biblioentry id="itu-t81"> | ||
| 131 | <abbrev>ITU-T.81</abbrev> | ||
| 132 | <authorgroup> | ||
| 133 | <corpauthor>International Telecommunication Union | ||
| 134 | (<ulink url="http://www.itu.int">http://www.itu.int</ulink>)</corpauthor> | ||
| 135 | </authorgroup> | ||
| 136 | <title>ITU-T Recommendation T.81 | ||
| 137 | "Information Technology — Digital Compression and Coding of Continous-Tone | ||
| 138 | Still Images — Requirements and Guidelines"</title> | ||
| 139 | </biblioentry> | ||
| 140 | |||
| 141 | <biblioentry id="w3c-jpeg-jfif"> | ||
| 142 | <abbrev>W3C JPEG JFIF</abbrev> | ||
| 143 | <authorgroup> | ||
| 144 | <corpauthor>The World Wide Web Consortium (<ulink | ||
| 145 | url="http://www.w3.org/Graphics/JPEG">http://www.w3.org</ulink>)</corpauthor> | ||
| 146 | </authorgroup> | ||
| 147 | <title>JPEG JFIF</title> | ||
| 148 | </biblioentry> | ||
| 149 | |||
| 150 | <biblioentry id="smpte12m"> | ||
| 151 | <abbrev>SMPTE 12M</abbrev> | ||
| 152 | <authorgroup> | ||
| 153 | <corpauthor>Society of Motion Picture and Television Engineers | ||
| 154 | (<ulink url="http://www.smpte.org">http://www.smpte.org</ulink>)</corpauthor> | ||
| 155 | </authorgroup> | ||
| 156 | <title>SMPTE 12M-1999 "Television, Audio and Film - Time and | ||
| 157 | Control Code"</title> | ||
| 158 | </biblioentry> | ||
| 159 | |||
| 160 | <biblioentry id="smpte170m"> | ||
| 161 | <abbrev>SMPTE 170M</abbrev> | ||
| 162 | <authorgroup> | ||
| 163 | <corpauthor>Society of Motion Picture and Television Engineers | ||
| 164 | (<ulink url="http://www.smpte.org">http://www.smpte.org</ulink>)</corpauthor> | ||
| 165 | </authorgroup> | ||
| 166 | <title>SMPTE 170M-1999 "Television - Composite Analog Video | ||
| 167 | Signal - NTSC for Studio Applications"</title> | ||
| 168 | </biblioentry> | ||
| 169 | |||
| 170 | <biblioentry id="smpte240m"> | ||
| 171 | <abbrev>SMPTE 240M</abbrev> | ||
| 172 | <authorgroup> | ||
| 173 | <corpauthor>Society of Motion Picture and Television Engineers | ||
| 174 | (<ulink url="http://www.smpte.org">http://www.smpte.org</ulink>)</corpauthor> | ||
| 175 | </authorgroup> | ||
| 176 | <title>SMPTE 240M-1999 "Television - Signal Parameters - | ||
| 177 | 1125-Line High-Definition Production"</title> | ||
| 178 | </biblioentry> | ||
| 179 | |||
| 180 | <biblioentry id="smpte431"> | ||
| 181 | <abbrev>SMPTE RP 431-2</abbrev> | ||
| 182 | <authorgroup> | ||
| 183 | <corpauthor>Society of Motion Picture and Television Engineers | ||
| 184 | (<ulink url="http://www.smpte.org">http://www.smpte.org</ulink>)</corpauthor> | ||
| 185 | </authorgroup> | ||
| 186 | <title>SMPTE RP 431-2:2011 "D-Cinema Quality - Reference Projector and Environment"</title> | ||
| 187 | </biblioentry> | ||
| 188 | |||
| 189 | <biblioentry id="smpte2084"> | ||
| 190 | <abbrev>SMPTE ST 2084</abbrev> | ||
| 191 | <authorgroup> | ||
| 192 | <corpauthor>Society of Motion Picture and Television Engineers | ||
| 193 | (<ulink url="http://www.smpte.org">http://www.smpte.org</ulink>)</corpauthor> | ||
| 194 | </authorgroup> | ||
| 195 | <title>SMPTE ST 2084:2014 "High Dynamic Range Electro-Optical Transfer Function of Master Reference Displays"</title> | ||
| 196 | </biblioentry> | ||
| 197 | |||
| 198 | <biblioentry id="srgb"> | ||
| 199 | <abbrev>sRGB</abbrev> | ||
| 200 | <authorgroup> | ||
| 201 | <corpauthor>International Electrotechnical Commission | ||
| 202 | (<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor> | ||
| 203 | </authorgroup> | ||
| 204 | <title>IEC 61966-2-1 ed1.0 "Multimedia systems and equipment - Colour measurement | ||
| 205 | and management - Part 2-1: Colour management - Default RGB colour space - sRGB"</title> | ||
| 206 | </biblioentry> | ||
| 207 | |||
| 208 | <biblioentry id="sycc"> | ||
| 209 | <abbrev>sYCC</abbrev> | ||
| 210 | <authorgroup> | ||
| 211 | <corpauthor>International Electrotechnical Commission | ||
| 212 | (<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor> | ||
| 213 | </authorgroup> | ||
| 214 | <title>IEC 61966-2-1-am1 ed1.0 "Amendment 1 - Multimedia systems and equipment - Colour measurement | ||
| 215 | and management - Part 2-1: Colour management - Default RGB colour space - sRGB"</title> | ||
| 216 | </biblioentry> | ||
| 217 | |||
| 218 | <biblioentry id="xvycc"> | ||
| 219 | <abbrev>xvYCC</abbrev> | ||
| 220 | <authorgroup> | ||
| 221 | <corpauthor>International Electrotechnical Commission | ||
| 222 | (<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor> | ||
| 223 | </authorgroup> | ||
| 224 | <title>IEC 61966-2-4 ed1.0 "Multimedia systems and equipment - Colour measurement | ||
| 225 | and management - Part 2-4: Colour management - Extended-gamut YCC colour space for video | ||
| 226 | applications - xvYCC"</title> | ||
| 227 | </biblioentry> | ||
| 228 | |||
| 229 | <biblioentry id="adobergb"> | ||
| 230 | <abbrev>AdobeRGB</abbrev> | ||
| 231 | <authorgroup> | ||
| 232 | <corpauthor>Adobe Systems Incorporated (<ulink url="http://www.adobe.com">http://www.adobe.com</ulink>)</corpauthor> | ||
| 233 | </authorgroup> | ||
| 234 | <title>Adobe© RGB (1998) Color Image Encoding Version 2005-05</title> | ||
| 235 | </biblioentry> | ||
| 236 | |||
| 237 | <biblioentry id="oprgb"> | ||
| 238 | <abbrev>opRGB</abbrev> | ||
| 239 | <authorgroup> | ||
| 240 | <corpauthor>International Electrotechnical Commission | ||
| 241 | (<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor> | ||
| 242 | </authorgroup> | ||
| 243 | <title>IEC 61966-2-5 "Multimedia systems and equipment - Colour measurement | ||
| 244 | and management - Part 2-5: Colour management - Optional RGB colour space - opRGB"</title> | ||
| 245 | </biblioentry> | ||
| 246 | |||
| 247 | <biblioentry id="itu2020"> | ||
| 248 | <abbrev>ITU BT.2020</abbrev> | ||
| 249 | <authorgroup> | ||
| 250 | <corpauthor>International Telecommunication Union (<ulink | ||
| 251 | url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor> | ||
| 252 | </authorgroup> | ||
| 253 | <title>ITU-R Recommendation BT.2020 (08/2012) "Parameter values for ultra-high | ||
| 254 | definition television systems for production and international programme exchange" | ||
| 255 | </title> | ||
| 256 | </biblioentry> | ||
| 257 | |||
| 258 | <biblioentry id="tech3213"> | ||
| 259 | <abbrev>EBU Tech 3213</abbrev> | ||
| 260 | <authorgroup> | ||
| 261 | <corpauthor>European Broadcast Union (<ulink | ||
| 262 | url="http://www.ebu.ch">http://www.ebu.ch</ulink>)</corpauthor> | ||
| 263 | </authorgroup> | ||
| 264 | <title>E.B.U. Standard for Chromaticity Tolerances for Studio Monitors"</title> | ||
| 265 | </biblioentry> | ||
| 266 | |||
| 267 | <biblioentry id="iec62106"> | ||
| 268 | <abbrev>IEC 62106</abbrev> | ||
| 269 | <authorgroup> | ||
| 270 | <corpauthor>International Electrotechnical Commission | ||
| 271 | (<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor> | ||
| 272 | </authorgroup> | ||
| 273 | <title>Specification of the radio data system (RDS) for VHF/FM sound broadcasting | ||
| 274 | in the frequency range from 87,5 to 108,0 MHz</title> | ||
| 275 | </biblioentry> | ||
| 276 | |||
| 277 | <biblioentry id="nrsc4"> | ||
| 278 | <abbrev>NRSC-4-B</abbrev> | ||
| 279 | <authorgroup> | ||
| 280 | <corpauthor>National Radio Systems Committee | ||
| 281 | (<ulink url="http://www.nrscstandards.org">http://www.nrscstandards.org</ulink>)</corpauthor> | ||
| 282 | </authorgroup> | ||
| 283 | <title>NRSC-4-B: United States RBDS Standard</title> | ||
| 284 | </biblioentry> | ||
| 285 | |||
| 286 | <biblioentry id="iso12232"> | ||
| 287 | <abbrev>ISO 12232:2006</abbrev> | ||
| 288 | <authorgroup> | ||
| 289 | <corpauthor>International Organization for Standardization | ||
| 290 | (<ulink url="http://www.iso.org">http://www.iso.org</ulink>)</corpauthor> | ||
| 291 | </authorgroup> | ||
| 292 | <title>Photography — Digital still cameras — Determination | ||
| 293 | of exposure index, ISO speed ratings, standard output sensitivity, and | ||
| 294 | recommended exposure index</title> | ||
| 295 | </biblioentry> | ||
| 296 | |||
| 297 | <biblioentry id="cea861"> | ||
| 298 | <abbrev>CEA-861-E</abbrev> | ||
| 299 | <authorgroup> | ||
| 300 | <corpauthor>Consumer Electronics Association | ||
| 301 | (<ulink url="http://www.ce.org">http://www.ce.org</ulink>)</corpauthor> | ||
| 302 | </authorgroup> | ||
| 303 | <title>A DTV Profile for Uncompressed High Speed Digital Interfaces</title> | ||
| 304 | </biblioentry> | ||
| 305 | |||
| 306 | <biblioentry id="vesadmt"> | ||
| 307 | <abbrev>VESA DMT</abbrev> | ||
| 308 | <authorgroup> | ||
| 309 | <corpauthor>Video Electronics Standards Association | ||
| 310 | (<ulink url="http://www.vesa.org">http://www.vesa.org</ulink>)</corpauthor> | ||
| 311 | </authorgroup> | ||
| 312 | <title>VESA and Industry Standards and Guidelines for Computer Display Monitor Timing (DMT)</title> | ||
| 313 | </biblioentry> | ||
| 314 | |||
| 315 | <biblioentry id="vesaedid"> | ||
| 316 | <abbrev>EDID</abbrev> | ||
| 317 | <authorgroup> | ||
| 318 | <corpauthor>Video Electronics Standards Association | ||
| 319 | (<ulink url="http://www.vesa.org">http://www.vesa.org</ulink>)</corpauthor> | ||
| 320 | </authorgroup> | ||
| 321 | <title>VESA Enhanced Extended Display Identification Data Standard</title> | ||
| 322 | <subtitle>Release A, Revision 2</subtitle> | ||
| 323 | </biblioentry> | ||
| 324 | |||
| 325 | <biblioentry id="hdcp"> | ||
| 326 | <abbrev>HDCP</abbrev> | ||
| 327 | <authorgroup> | ||
| 328 | <corpauthor>Digital Content Protection LLC | ||
| 329 | (<ulink url="http://www.digital-cp.com">http://www.digital-cp.com</ulink>)</corpauthor> | ||
| 330 | </authorgroup> | ||
| 331 | <title>High-bandwidth Digital Content Protection System</title> | ||
| 332 | <subtitle>Revision 1.3</subtitle> | ||
| 333 | </biblioentry> | ||
| 334 | |||
| 335 | <biblioentry id="hdmi"> | ||
| 336 | <abbrev>HDMI</abbrev> | ||
| 337 | <authorgroup> | ||
| 338 | <corpauthor>HDMI Licensing LLC | ||
| 339 | (<ulink url="http://www.hdmi.org">http://www.hdmi.org</ulink>)</corpauthor> | ||
| 340 | </authorgroup> | ||
| 341 | <title>High-Definition Multimedia Interface</title> | ||
| 342 | <subtitle>Specification Version 1.4a</subtitle> | ||
| 343 | </biblioentry> | ||
| 344 | |||
| 345 | <biblioentry id="hdmi2"> | ||
| 346 | <abbrev>HDMI2</abbrev> | ||
| 347 | <authorgroup> | ||
| 348 | <corpauthor>HDMI Licensing LLC | ||
| 349 | (<ulink url="http://www.hdmi.org">http://www.hdmi.org</ulink>)</corpauthor> | ||
| 350 | </authorgroup> | ||
| 351 | <title>High-Definition Multimedia Interface</title> | ||
| 352 | <subtitle>Specification Version 2.0</subtitle> | ||
| 353 | </biblioentry> | ||
| 354 | |||
| 355 | <biblioentry id="dp"> | ||
| 356 | <abbrev>DP</abbrev> | ||
| 357 | <authorgroup> | ||
| 358 | <corpauthor>Video Electronics Standards Association | ||
| 359 | (<ulink url="http://www.vesa.org">http://www.vesa.org</ulink>)</corpauthor> | ||
| 360 | </authorgroup> | ||
| 361 | <title>VESA DisplayPort Standard</title> | ||
| 362 | <subtitle>Version 1, Revision 2</subtitle> | ||
| 363 | </biblioentry> | ||
| 364 | |||
| 365 | <biblioentry id="poynton"> | ||
| 366 | <abbrev>poynton</abbrev> | ||
| 367 | <authorgroup> | ||
| 368 | <corpauthor>Charles Poynton</corpauthor> | ||
| 369 | </authorgroup> | ||
| 370 | <title>Digital Video and HDTV, Algorithms and Interfaces</title> | ||
| 371 | </biblioentry> | ||
| 372 | |||
| 373 | <biblioentry id="colimg"> | ||
| 374 | <abbrev>colimg</abbrev> | ||
| 375 | <authorgroup> | ||
| 376 | <corpauthor>Erik Reinhard et al.</corpauthor> | ||
| 377 | </authorgroup> | ||
| 378 | <title>Color Imaging: Fundamentals and Applications</title> | ||
| 379 | </biblioentry> | ||
| 380 | |||
| 381 | </bibliography> | ||
| @@ -1,659 +0,0 @@ | |||
| 1 | <programlisting> | ||
| 2 | /* | ||
| 3 | * V4L2 video capture example | ||
| 4 | * | ||
| 5 | * This program can be used and distributed without restrictions. | ||
| 6 | * | ||
| 7 | * This program is provided with the V4L2 API | ||
| 8 | * see https://linuxtv.org/docs.php for more information | ||
| 9 | */ | ||
| 10 | |||
| 11 | #include <stdio.h> | ||
| 12 | #include <stdlib.h> | ||
| 13 | #include <string.h> | ||
| 14 | #include <assert.h> | ||
| 15 | |||
| 16 | #include <getopt.h> /* getopt_long() */ | ||
| 17 | |||
| 18 | #include <fcntl.h> /* low-level i/o */ | ||
| 19 | #include <unistd.h> | ||
| 20 | #include <errno.h> | ||
| 21 | #include <sys/stat.h> | ||
| 22 | #include <sys/types.h> | ||
| 23 | #include <sys/time.h> | ||
| 24 | #include <sys/mman.h> | ||
| 25 | #include <sys/ioctl.h> | ||
| 26 | |||
| 27 | #include <linux/videodev2.h> | ||
| 28 | |||
| 29 | #define CLEAR(x) memset(&(x), 0, sizeof(x)) | ||
| 30 | |||
| 31 | enum io_method { | ||
| 32 | IO_METHOD_READ, | ||
| 33 | IO_METHOD_MMAP, | ||
| 34 | IO_METHOD_USERPTR, | ||
| 35 | }; | ||
| 36 | |||
| 37 | struct buffer { | ||
| 38 | void *start; | ||
| 39 | size_t length; | ||
| 40 | }; | ||
| 41 | |||
| 42 | static char *dev_name; | ||
| 43 | static enum io_method io = IO_METHOD_MMAP; | ||
| 44 | static int fd = -1; | ||
| 45 | struct buffer *buffers; | ||
| 46 | static unsigned int n_buffers; | ||
| 47 | static int out_buf; | ||
| 48 | static int force_format; | ||
| 49 | static int frame_count = 70; | ||
| 50 | |||
| 51 | static void errno_exit(const char *s) | ||
| 52 | { | ||
| 53 | fprintf(stderr, "%s error %d, %s\n", s, errno, strerror(errno)); | ||
| 54 | exit(EXIT_FAILURE); | ||
| 55 | } | ||
| 56 | |||
| 57 | static int xioctl(int fh, int request, void *arg) | ||
| 58 | { | ||
| 59 | int r; | ||
| 60 | |||
| 61 | do { | ||
| 62 | r = ioctl(fh, request, arg); | ||
| 63 | } while (-1 == r && EINTR == errno); | ||
| 64 | |||
| 65 | return r; | ||
| 66 | } | ||
| 67 | |||
| 68 | static void process_image(const void *p, int size) | ||
| 69 | { | ||
| 70 | if (out_buf) | ||
| 71 | fwrite(p, size, 1, stdout); | ||
| 72 | |||
| 73 | fflush(stderr); | ||
| 74 | fprintf(stderr, "."); | ||
| 75 | fflush(stdout); | ||
| 76 | } | ||
| 77 | |||
| 78 | static int read_frame(void) | ||
| 79 | { | ||
| 80 | struct <link linkend="v4l2-buffer">v4l2_buffer</link> buf; | ||
| 81 | unsigned int i; | ||
| 82 | |||
| 83 | switch (io) { | ||
| 84 | case IO_METHOD_READ: | ||
| 85 | if (-1 == read(fd, buffers[0].start, buffers[0].length)) { | ||
| 86 | switch (errno) { | ||
| 87 | case EAGAIN: | ||
| 88 | return 0; | ||
| 89 | |||
| 90 | case EIO: | ||
| 91 | /* Could ignore EIO, see spec. */ | ||
| 92 | |||
| 93 | /* fall through */ | ||
| 94 | |||
| 95 | default: | ||
| 96 | errno_exit("read"); | ||
| 97 | } | ||
| 98 | } | ||
| 99 | |||
| 100 | process_image(buffers[0].start, buffers[0].length); | ||
| 101 | break; | ||
| 102 | |||
| 103 | case IO_METHOD_MMAP: | ||
| 104 | CLEAR(buf); | ||
| 105 | |||
| 106 | buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 107 | buf.memory = V4L2_MEMORY_MMAP; | ||
| 108 | |||
| 109 | if (-1 == xioctl(fd, VIDIOC_DQBUF, &buf)) { | ||
| 110 | switch (errno) { | ||
| 111 | case EAGAIN: | ||
| 112 | return 0; | ||
| 113 | |||
| 114 | case EIO: | ||
| 115 | /* Could ignore EIO, see spec. */ | ||
| 116 | |||
| 117 | /* fall through */ | ||
| 118 | |||
| 119 | default: | ||
| 120 | errno_exit("VIDIOC_DQBUF"); | ||
| 121 | } | ||
| 122 | } | ||
| 123 | |||
| 124 | assert(buf.index < n_buffers); | ||
| 125 | |||
| 126 | process_image(buffers[buf.index].start, buf.bytesused); | ||
| 127 | |||
| 128 | if (-1 == xioctl(fd, VIDIOC_QBUF, &buf)) | ||
| 129 | errno_exit("VIDIOC_QBUF"); | ||
| 130 | break; | ||
| 131 | |||
| 132 | case IO_METHOD_USERPTR: | ||
| 133 | CLEAR(buf); | ||
| 134 | |||
| 135 | buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 136 | buf.memory = V4L2_MEMORY_USERPTR; | ||
| 137 | |||
| 138 | if (-1 == xioctl(fd, VIDIOC_DQBUF, &buf)) { | ||
| 139 | switch (errno) { | ||
| 140 | case EAGAIN: | ||
| 141 | return 0; | ||
| 142 | |||
| 143 | case EIO: | ||
| 144 | /* Could ignore EIO, see spec. */ | ||
| 145 | |||
| 146 | /* fall through */ | ||
| 147 | |||
| 148 | default: | ||
| 149 | errno_exit("VIDIOC_DQBUF"); | ||
| 150 | } | ||
| 151 | } | ||
| 152 | |||
| 153 | for (i = 0; i < n_buffers; ++i) | ||
| 154 | if (buf.m.userptr == (unsigned long)buffers[i].start | ||
| 155 | && buf.length == buffers[i].length) | ||
| 156 | break; | ||
| 157 | |||
| 158 | assert(i < n_buffers); | ||
| 159 | |||
| 160 | process_image((void *)buf.m.userptr, buf.bytesused); | ||
| 161 | |||
| 162 | if (-1 == xioctl(fd, VIDIOC_QBUF, &buf)) | ||
| 163 | errno_exit("VIDIOC_QBUF"); | ||
| 164 | break; | ||
| 165 | } | ||
| 166 | |||
| 167 | return 1; | ||
| 168 | } | ||
| 169 | |||
| 170 | static void mainloop(void) | ||
| 171 | { | ||
| 172 | unsigned int count; | ||
| 173 | |||
| 174 | count = frame_count; | ||
| 175 | |||
| 176 | while (count-- > 0) { | ||
| 177 | for (;;) { | ||
| 178 | fd_set fds; | ||
| 179 | struct timeval tv; | ||
| 180 | int r; | ||
| 181 | |||
| 182 | FD_ZERO(&fds); | ||
| 183 | FD_SET(fd, &fds); | ||
| 184 | |||
| 185 | /* Timeout. */ | ||
| 186 | tv.tv_sec = 2; | ||
| 187 | tv.tv_usec = 0; | ||
| 188 | |||
| 189 | r = select(fd + 1, &fds, NULL, NULL, &tv); | ||
| 190 | |||
| 191 | if (-1 == r) { | ||
| 192 | if (EINTR == errno) | ||
| 193 | continue; | ||
| 194 | errno_exit("select"); | ||
| 195 | } | ||
| 196 | |||
| 197 | if (0 == r) { | ||
| 198 | fprintf(stderr, "select timeout\n"); | ||
| 199 | exit(EXIT_FAILURE); | ||
| 200 | } | ||
| 201 | |||
| 202 | if (read_frame()) | ||
| 203 | break; | ||
| 204 | /* EAGAIN - continue select loop. */ | ||
| 205 | } | ||
| 206 | } | ||
| 207 | } | ||
| 208 | |||
| 209 | static void stop_capturing(void) | ||
| 210 | { | ||
| 211 | enum <link linkend="v4l2-buf-type">v4l2_buf_type</link> type; | ||
| 212 | |||
| 213 | switch (io) { | ||
| 214 | case IO_METHOD_READ: | ||
| 215 | /* Nothing to do. */ | ||
| 216 | break; | ||
| 217 | |||
| 218 | case IO_METHOD_MMAP: | ||
| 219 | case IO_METHOD_USERPTR: | ||
| 220 | type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 221 | if (-1 == xioctl(fd, VIDIOC_STREAMOFF, &type)) | ||
| 222 | errno_exit("VIDIOC_STREAMOFF"); | ||
| 223 | break; | ||
| 224 | } | ||
| 225 | } | ||
| 226 | |||
| 227 | static void start_capturing(void) | ||
| 228 | { | ||
| 229 | unsigned int i; | ||
| 230 | enum <link linkend="v4l2-buf-type">v4l2_buf_type</link> type; | ||
| 231 | |||
| 232 | switch (io) { | ||
| 233 | case IO_METHOD_READ: | ||
| 234 | /* Nothing to do. */ | ||
| 235 | break; | ||
| 236 | |||
| 237 | case IO_METHOD_MMAP: | ||
| 238 | for (i = 0; i < n_buffers; ++i) { | ||
| 239 | struct <link linkend="v4l2-buffer">v4l2_buffer</link> buf; | ||
| 240 | |||
| 241 | CLEAR(buf); | ||
| 242 | buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 243 | buf.memory = V4L2_MEMORY_MMAP; | ||
| 244 | buf.index = i; | ||
| 245 | |||
| 246 | if (-1 == xioctl(fd, VIDIOC_QBUF, &buf)) | ||
| 247 | errno_exit("VIDIOC_QBUF"); | ||
| 248 | } | ||
| 249 | type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 250 | if (-1 == xioctl(fd, VIDIOC_STREAMON, &type)) | ||
| 251 | errno_exit("VIDIOC_STREAMON"); | ||
| 252 | break; | ||
| 253 | |||
| 254 | case IO_METHOD_USERPTR: | ||
| 255 | for (i = 0; i < n_buffers; ++i) { | ||
| 256 | struct <link linkend="v4l2-buffer">v4l2_buffer</link> buf; | ||
| 257 | |||
| 258 | CLEAR(buf); | ||
| 259 | buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 260 | buf.memory = V4L2_MEMORY_USERPTR; | ||
| 261 | buf.index = i; | ||
| 262 | buf.m.userptr = (unsigned long)buffers[i].start; | ||
| 263 | buf.length = buffers[i].length; | ||
| 264 | |||
| 265 | if (-1 == xioctl(fd, VIDIOC_QBUF, &buf)) | ||
| 266 | errno_exit("VIDIOC_QBUF"); | ||
| 267 | } | ||
| 268 | type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 269 | if (-1 == xioctl(fd, VIDIOC_STREAMON, &type)) | ||
| 270 | errno_exit("VIDIOC_STREAMON"); | ||
| 271 | break; | ||
| 272 | } | ||
| 273 | } | ||
| 274 | |||
| 275 | static void uninit_device(void) | ||
| 276 | { | ||
| 277 | unsigned int i; | ||
| 278 | |||
| 279 | switch (io) { | ||
| 280 | case IO_METHOD_READ: | ||
| 281 | free(buffers[0].start); | ||
| 282 | break; | ||
| 283 | |||
| 284 | case IO_METHOD_MMAP: | ||
| 285 | for (i = 0; i < n_buffers; ++i) | ||
| 286 | if (-1 == munmap(buffers[i].start, buffers[i].length)) | ||
| 287 | errno_exit("munmap"); | ||
| 288 | break; | ||
| 289 | |||
| 290 | case IO_METHOD_USERPTR: | ||
| 291 | for (i = 0; i < n_buffers; ++i) | ||
| 292 | free(buffers[i].start); | ||
| 293 | break; | ||
| 294 | } | ||
| 295 | |||
| 296 | free(buffers); | ||
| 297 | } | ||
| 298 | |||
| 299 | static void init_read(unsigned int buffer_size) | ||
| 300 | { | ||
| 301 | buffers = calloc(1, sizeof(*buffers)); | ||
| 302 | |||
| 303 | if (!buffers) { | ||
| 304 | fprintf(stderr, "Out of memory\n"); | ||
| 305 | exit(EXIT_FAILURE); | ||
| 306 | } | ||
| 307 | |||
| 308 | buffers[0].length = buffer_size; | ||
| 309 | buffers[0].start = malloc(buffer_size); | ||
| 310 | |||
| 311 | if (!buffers[0].start) { | ||
| 312 | fprintf(stderr, "Out of memory\n"); | ||
| 313 | exit(EXIT_FAILURE); | ||
| 314 | } | ||
| 315 | } | ||
| 316 | |||
| 317 | static void init_mmap(void) | ||
| 318 | { | ||
| 319 | struct <link linkend="v4l2-requestbuffers">v4l2_requestbuffers</link> req; | ||
| 320 | |||
| 321 | CLEAR(req); | ||
| 322 | |||
| 323 | req.count = 4; | ||
| 324 | req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 325 | req.memory = V4L2_MEMORY_MMAP; | ||
| 326 | |||
| 327 | if (-1 == xioctl(fd, VIDIOC_REQBUFS, &req)) { | ||
| 328 | if (EINVAL == errno) { | ||
| 329 | fprintf(stderr, "%s does not support " | ||
| 330 | "memory mapping\n", dev_name); | ||
| 331 | exit(EXIT_FAILURE); | ||
| 332 | } else { | ||
| 333 | errno_exit("VIDIOC_REQBUFS"); | ||
| 334 | } | ||
| 335 | } | ||
| 336 | |||
| 337 | if (req.count < 2) { | ||
| 338 | fprintf(stderr, "Insufficient buffer memory on %s\n", | ||
| 339 | dev_name); | ||
| 340 | exit(EXIT_FAILURE); | ||
| 341 | } | ||
| 342 | |||
| 343 | buffers = calloc(req.count, sizeof(*buffers)); | ||
| 344 | |||
| 345 | if (!buffers) { | ||
| 346 | fprintf(stderr, "Out of memory\n"); | ||
| 347 | exit(EXIT_FAILURE); | ||
| 348 | } | ||
| 349 | |||
| 350 | for (n_buffers = 0; n_buffers < req.count; ++n_buffers) { | ||
| 351 | struct <link linkend="v4l2-buffer">v4l2_buffer</link> buf; | ||
| 352 | |||
| 353 | CLEAR(buf); | ||
| 354 | |||
| 355 | buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 356 | buf.memory = V4L2_MEMORY_MMAP; | ||
| 357 | buf.index = n_buffers; | ||
| 358 | |||
| 359 | if (-1 == xioctl(fd, VIDIOC_QUERYBUF, &buf)) | ||
| 360 | errno_exit("VIDIOC_QUERYBUF"); | ||
| 361 | |||
| 362 | buffers[n_buffers].length = buf.length; | ||
| 363 | buffers[n_buffers].start = | ||
| 364 | mmap(NULL /* start anywhere */, | ||
| 365 | buf.length, | ||
| 366 | PROT_READ | PROT_WRITE /* required */, | ||
| 367 | MAP_SHARED /* recommended */, | ||
| 368 | fd, buf.m.offset); | ||
| 369 | |||
| 370 | if (MAP_FAILED == buffers[n_buffers].start) | ||
| 371 | errno_exit("mmap"); | ||
| 372 | } | ||
| 373 | } | ||
| 374 | |||
| 375 | static void init_userp(unsigned int buffer_size) | ||
| 376 | { | ||
| 377 | struct <link linkend="v4l2-requestbuffers">v4l2_requestbuffers</link> req; | ||
| 378 | |||
| 379 | CLEAR(req); | ||
| 380 | |||
| 381 | req.count = 4; | ||
| 382 | req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 383 | req.memory = V4L2_MEMORY_USERPTR; | ||
| 384 | |||
| 385 | if (-1 == xioctl(fd, VIDIOC_REQBUFS, &req)) { | ||
| 386 | if (EINVAL == errno) { | ||
| 387 | fprintf(stderr, "%s does not support " | ||
| 388 | "user pointer i/o\n", dev_name); | ||
| 389 | exit(EXIT_FAILURE); | ||
| 390 | } else { | ||
| 391 | errno_exit("VIDIOC_REQBUFS"); | ||
| 392 | } | ||
| 393 | } | ||
| 394 | |||
| 395 | buffers = calloc(4, sizeof(*buffers)); | ||
| 396 | |||
| 397 | if (!buffers) { | ||
| 398 | fprintf(stderr, "Out of memory\n"); | ||
| 399 | exit(EXIT_FAILURE); | ||
| 400 | } | ||
| 401 | |||
| 402 | for (n_buffers = 0; n_buffers < 4; ++n_buffers) { | ||
| 403 | buffers[n_buffers].length = buffer_size; | ||
| 404 | buffers[n_buffers].start = malloc(buffer_size); | ||
| 405 | |||
| 406 | if (!buffers[n_buffers].start) { | ||
| 407 | fprintf(stderr, "Out of memory\n"); | ||
| 408 | exit(EXIT_FAILURE); | ||
| 409 | } | ||
| 410 | } | ||
| 411 | } | ||
| 412 | |||
| 413 | static void init_device(void) | ||
| 414 | { | ||
| 415 | struct <link linkend="v4l2-capability">v4l2_capability</link> cap; | ||
| 416 | struct <link linkend="v4l2-cropcap">v4l2_cropcap</link> cropcap; | ||
| 417 | struct <link linkend="v4l2-crop">v4l2_crop</link> crop; | ||
| 418 | struct <link linkend="v4l2-format">v4l2_format</link> fmt; | ||
| 419 | unsigned int min; | ||
| 420 | |||
| 421 | if (-1 == xioctl(fd, VIDIOC_QUERYCAP, &cap)) { | ||
| 422 | if (EINVAL == errno) { | ||
| 423 | fprintf(stderr, "%s is no V4L2 device\n", | ||
| 424 | dev_name); | ||
| 425 | exit(EXIT_FAILURE); | ||
| 426 | } else { | ||
| 427 | errno_exit("VIDIOC_QUERYCAP"); | ||
| 428 | } | ||
| 429 | } | ||
| 430 | |||
| 431 | if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) { | ||
| 432 | fprintf(stderr, "%s is no video capture device\n", | ||
| 433 | dev_name); | ||
| 434 | exit(EXIT_FAILURE); | ||
| 435 | } | ||
| 436 | |||
| 437 | switch (io) { | ||
| 438 | case IO_METHOD_READ: | ||
| 439 | if (!(cap.capabilities & V4L2_CAP_READWRITE)) { | ||
| 440 | fprintf(stderr, "%s does not support read i/o\n", | ||
| 441 | dev_name); | ||
| 442 | exit(EXIT_FAILURE); | ||
| 443 | } | ||
| 444 | break; | ||
| 445 | |||
| 446 | case IO_METHOD_MMAP: | ||
| 447 | case IO_METHOD_USERPTR: | ||
| 448 | if (!(cap.capabilities & V4L2_CAP_STREAMING)) { | ||
| 449 | fprintf(stderr, "%s does not support streaming i/o\n", | ||
| 450 | dev_name); | ||
| 451 | exit(EXIT_FAILURE); | ||
| 452 | } | ||
| 453 | break; | ||
| 454 | } | ||
| 455 | |||
| 456 | |||
| 457 | /* Select video input, video standard and tune here. */ | ||
| 458 | |||
| 459 | |||
| 460 | CLEAR(cropcap); | ||
| 461 | |||
| 462 | cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 463 | |||
| 464 | if (0 == xioctl(fd, VIDIOC_CROPCAP, &cropcap)) { | ||
| 465 | crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 466 | crop.c = cropcap.defrect; /* reset to default */ | ||
| 467 | |||
| 468 | if (-1 == xioctl(fd, VIDIOC_S_CROP, &crop)) { | ||
| 469 | switch (errno) { | ||
| 470 | case EINVAL: | ||
| 471 | /* Cropping not supported. */ | ||
| 472 | break; | ||
| 473 | default: | ||
| 474 | /* Errors ignored. */ | ||
| 475 | break; | ||
| 476 | } | ||
| 477 | } | ||
| 478 | } else { | ||
| 479 | /* Errors ignored. */ | ||
| 480 | } | ||
| 481 | |||
| 482 | |||
| 483 | CLEAR(fmt); | ||
| 484 | |||
| 485 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 486 | if (force_format) { | ||
| 487 | fmt.fmt.pix.width = 640; | ||
| 488 | fmt.fmt.pix.height = 480; | ||
| 489 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; | ||
| 490 | fmt.fmt.pix.field = V4L2_FIELD_INTERLACED; | ||
| 491 | |||
| 492 | if (-1 == xioctl(fd, VIDIOC_S_FMT, &fmt)) | ||
| 493 | errno_exit("VIDIOC_S_FMT"); | ||
| 494 | |||
| 495 | /* Note VIDIOC_S_FMT may change width and height. */ | ||
| 496 | } else { | ||
| 497 | /* Preserve original settings as set by v4l2-ctl for example */ | ||
| 498 | if (-1 == xioctl(fd, VIDIOC_G_FMT, &fmt)) | ||
| 499 | errno_exit("VIDIOC_G_FMT"); | ||
| 500 | } | ||
| 501 | |||
| 502 | /* Buggy driver paranoia. */ | ||
| 503 | min = fmt.fmt.pix.width * 2; | ||
| 504 | if (fmt.fmt.pix.bytesperline < min) | ||
| 505 | fmt.fmt.pix.bytesperline = min; | ||
| 506 | min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height; | ||
| 507 | if (fmt.fmt.pix.sizeimage < min) | ||
| 508 | fmt.fmt.pix.sizeimage = min; | ||
| 509 | |||
| 510 | switch (io) { | ||
| 511 | case IO_METHOD_READ: | ||
| 512 | init_read(fmt.fmt.pix.sizeimage); | ||
| 513 | break; | ||
| 514 | |||
| 515 | case IO_METHOD_MMAP: | ||
| 516 | init_mmap(); | ||
| 517 | break; | ||
| 518 | |||
| 519 | case IO_METHOD_USERPTR: | ||
| 520 | init_userp(fmt.fmt.pix.sizeimage); | ||
| 521 | break; | ||
| 522 | } | ||
| 523 | } | ||
| 524 | |||
| 525 | static void close_device(void) | ||
| 526 | { | ||
| 527 | if (-1 == close(fd)) | ||
| 528 | errno_exit("close"); | ||
| 529 | |||
| 530 | fd = -1; | ||
| 531 | } | ||
| 532 | |||
| 533 | static void open_device(void) | ||
| 534 | { | ||
| 535 | struct stat st; | ||
| 536 | |||
| 537 | if (-1 == stat(dev_name, &st)) { | ||
| 538 | fprintf(stderr, "Cannot identify '%s': %d, %s\n", | ||
| 539 | dev_name, errno, strerror(errno)); | ||
| 540 | exit(EXIT_FAILURE); | ||
| 541 | } | ||
| 542 | |||
| 543 | if (!S_ISCHR(st.st_mode)) { | ||
| 544 | fprintf(stderr, "%s is no device\n", dev_name); | ||
| 545 | exit(EXIT_FAILURE); | ||
| 546 | } | ||
| 547 | |||
| 548 | fd = open(dev_name, O_RDWR /* required */ | O_NONBLOCK, 0); | ||
| 549 | |||
| 550 | if (-1 == fd) { | ||
| 551 | fprintf(stderr, "Cannot open '%s': %d, %s\n", | ||
| 552 | dev_name, errno, strerror(errno)); | ||
| 553 | exit(EXIT_FAILURE); | ||
| 554 | } | ||
| 555 | } | ||
| 556 | |||
| 557 | static void usage(FILE *fp, int argc, char **argv) | ||
| 558 | { | ||
| 559 | fprintf(fp, | ||
| 560 | "Usage: %s [options]\n\n" | ||
| 561 | "Version 1.3\n" | ||
| 562 | "Options:\n" | ||
| 563 | "-d | --device name Video device name [%s]\n" | ||
| 564 | "-h | --help Print this message\n" | ||
| 565 | "-m | --mmap Use memory mapped buffers [default]\n" | ||
| 566 | "-r | --read Use read() calls\n" | ||
| 567 | "-u | --userp Use application allocated buffers\n" | ||
| 568 | "-o | --output Outputs stream to stdout\n" | ||
| 569 | "-f | --format Force format to 640x480 YUYV\n" | ||
| 570 | "-c | --count Number of frames to grab [%i]\n" | ||
| 571 | "", | ||
| 572 | argv[0], dev_name, frame_count); | ||
| 573 | } | ||
| 574 | |||
| 575 | static const char short_options[] = "d:hmruofc:"; | ||
| 576 | |||
| 577 | static const struct option | ||
| 578 | long_options[] = { | ||
| 579 | { "device", required_argument, NULL, 'd' }, | ||
| 580 | { "help", no_argument, NULL, 'h' }, | ||
| 581 | { "mmap", no_argument, NULL, 'm' }, | ||
| 582 | { "read", no_argument, NULL, 'r' }, | ||
| 583 | { "userp", no_argument, NULL, 'u' }, | ||
| 584 | { "output", no_argument, NULL, 'o' }, | ||
| 585 | { "format", no_argument, NULL, 'f' }, | ||
| 586 | { "count", required_argument, NULL, 'c' }, | ||
| 587 | { 0, 0, 0, 0 } | ||
| 588 | }; | ||
| 589 | |||
| 590 | int main(int argc, char **argv) | ||
| 591 | { | ||
| 592 | dev_name = "/dev/video0"; | ||
| 593 | |||
| 594 | for (;;) { | ||
| 595 | int idx; | ||
| 596 | int c; | ||
| 597 | |||
| 598 | c = getopt_long(argc, argv, | ||
| 599 | short_options, long_options, &idx); | ||
| 600 | |||
| 601 | if (-1 == c) | ||
| 602 | break; | ||
| 603 | |||
| 604 | switch (c) { | ||
| 605 | case 0: /* getopt_long() flag */ | ||
| 606 | break; | ||
| 607 | |||
| 608 | case 'd': | ||
| 609 | dev_name = optarg; | ||
| 610 | break; | ||
| 611 | |||
| 612 | case 'h': | ||
| 613 | usage(stdout, argc, argv); | ||
| 614 | exit(EXIT_SUCCESS); | ||
| 615 | |||
| 616 | case 'm': | ||
| 617 | io = IO_METHOD_MMAP; | ||
| 618 | break; | ||
| 619 | |||
| 620 | case 'r': | ||
| 621 | io = IO_METHOD_READ; | ||
| 622 | break; | ||
| 623 | |||
| 624 | case 'u': | ||
| 625 | io = IO_METHOD_USERPTR; | ||
| 626 | break; | ||
| 627 | |||
| 628 | case 'o': | ||
| 629 | out_buf++; | ||
| 630 | break; | ||
| 631 | |||
| 632 | case 'f': | ||
| 633 | force_format++; | ||
| 634 | break; | ||
| 635 | |||
| 636 | case 'c': | ||
| 637 | errno = 0; | ||
| 638 | frame_count = strtol(optarg, NULL, 0); | ||
| 639 | if (errno) | ||
| 640 | errno_exit(optarg); | ||
| 641 | break; | ||
| 642 | |||
| 643 | default: | ||
| 644 | usage(stderr, argc, argv); | ||
| 645 | exit(EXIT_FAILURE); | ||
| 646 | } | ||
| 647 | } | ||
| 648 | |||
| 649 | open_device(); | ||
| 650 | init_device(); | ||
| 651 | start_capturing(); | ||
| 652 | mainloop(); | ||
| 653 | stop_capturing(); | ||
| 654 | uninit_device(); | ||
| 655 | close_device(); | ||
| 656 | fprintf(stderr, "\n"); | ||
| 657 | return 0; | ||
| 658 | } | ||
| 659 | </programlisting> | ||
| @@ -1,75 +0,0 @@ | |||
| 1 | <partinfo> | ||
| 2 | <authorgroup> | ||
| 3 | <author> | ||
| 4 | <firstname>Hans</firstname> | ||
| 5 | <surname>Verkuil</surname> | ||
| 6 | <affiliation><address><email>hans.verkuil@cisco.com</email></address></affiliation> | ||
| 7 | <contrib>Initial version.</contrib> | ||
| 8 | </author> | ||
| 9 | </authorgroup> | ||
| 10 | <copyright> | ||
| 11 | <year>2016</year> | ||
| 12 | <holder>Hans Verkuil</holder> | ||
| 13 | </copyright> | ||
| 14 | |||
| 15 | <revhistory> | ||
| 16 | <!-- Put document revisions here, newest first. --> | ||
| 17 | <revision> | ||
| 18 | <revnumber>1.0.0</revnumber> | ||
| 19 | <date>2016-03-17</date> | ||
| 20 | <authorinitials>hv</authorinitials> | ||
| 21 | <revremark>Initial revision</revremark> | ||
| 22 | </revision> | ||
| 23 | </revhistory> | ||
| 24 | </partinfo> | ||
| 25 | |||
| 26 | <title>CEC API</title> | ||
| 27 | |||
| 28 | <chapter id="cec-api"> | ||
| 29 | <title>CEC: Consumer Electronics Control</title> | ||
| 30 | |||
| 31 | <section id="cec-intro"> | ||
| 32 | <title>Introduction</title> | ||
| 33 | <para> | ||
| 34 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 35 | is currently only available as a staging kernel module. | ||
| 36 | </para> | ||
| 37 | <para>HDMI connectors provide a single pin for use by the Consumer Electronics | ||
| 38 | Control protocol. This protocol allows different devices connected by an HDMI cable | ||
| 39 | to communicate. The protocol for CEC version 1.4 is defined in supplements 1 (CEC) | ||
| 40 | and 2 (HEAC or HDMI Ethernet and Audio Return Channel) of the HDMI 1.4a | ||
| 41 | (<xref linkend="hdmi" />) specification and the extensions added to CEC version 2.0 | ||
| 42 | are defined in chapter 11 of the HDMI 2.0 (<xref linkend="hdmi2" />) specification. | ||
| 43 | </para> | ||
| 44 | |||
| 45 | <para>The bitrate is very slow (effectively no more than 36 bytes per second) and | ||
| 46 | is based on the ancient AV.link protocol used in old SCART connectors. The protocol | ||
| 47 | closely resembles a crazy Rube Goldberg contraption and is an unholy mix of low and | ||
| 48 | high level messages. Some messages, especially those part of the HEAC protocol layered | ||
| 49 | on top of CEC, need to be handled by the kernel, others can be handled either by the | ||
| 50 | kernel or by userspace.</para> | ||
| 51 | |||
| 52 | <para>In addition, CEC can be implemented in HDMI receivers, transmitters and in USB | ||
| 53 | devices that have an HDMI input and an HDMI output and that control just the CEC pin.</para> | ||
| 54 | |||
| 55 | <para>Drivers that support CEC will create a CEC device node (/dev/cecX) | ||
| 56 | to give userspace access to the CEC adapter. The &CEC-ADAP-G-CAPS; ioctl will tell userspace | ||
| 57 | what it is allowed to do.</para> | ||
| 58 | </section> | ||
| 59 | </chapter> | ||
| 60 | |||
| 61 | <appendix id="cec-user-func"> | ||
| 62 | <title>Function Reference</title> | ||
| 63 | <!-- Keep this alphabetically sorted. --> | ||
| 64 | &sub-cec-func-open; | ||
| 65 | &sub-cec-func-close; | ||
| 66 | &sub-cec-func-ioctl; | ||
| 67 | &sub-cec-func-poll; | ||
| 68 | <!-- All ioctls go here. --> | ||
| 69 | &sub-cec-ioc-adap-g-caps; | ||
| 70 | &sub-cec-ioc-adap-g-log-addrs; | ||
| 71 | &sub-cec-ioc-adap-g-phys-addr; | ||
| 72 | &sub-cec-ioc-dqevent; | ||
| 73 | &sub-cec-ioc-g-mode; | ||
| 74 | &sub-cec-ioc-receive; | ||
| 75 | </appendix> | ||
| @@ -1,64 +0,0 @@ | |||
| 1 | <refentry id="cec-func-close"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>cec close()</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>cec-close</refname> | ||
| 9 | <refpurpose>Close a cec device</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcsynopsisinfo>#include <unistd.h></funcsynopsisinfo> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>close</function></funcdef> | ||
| 17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 18 | </funcprototype> | ||
| 19 | </funcsynopsis> | ||
| 20 | </refsynopsisdiv> | ||
| 21 | |||
| 22 | <refsect1> | ||
| 23 | <title>Arguments</title> | ||
| 24 | |||
| 25 | <variablelist> | ||
| 26 | <varlistentry> | ||
| 27 | <term><parameter>fd</parameter></term> | ||
| 28 | <listitem> | ||
| 29 | <para>&fd;</para> | ||
| 30 | </listitem> | ||
| 31 | </varlistentry> | ||
| 32 | </variablelist> | ||
| 33 | </refsect1> | ||
| 34 | |||
| 35 | <refsect1> | ||
| 36 | <title>Description</title> | ||
| 37 | |||
| 38 | <para> | ||
| 39 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 40 | is currently only available as a staging kernel module. | ||
| 41 | </para> | ||
| 42 | |||
| 43 | <para>Closes the cec device. Resources associated with the file descriptor | ||
| 44 | are freed. The device configuration remain unchanged.</para> | ||
| 45 | </refsect1> | ||
| 46 | |||
| 47 | <refsect1> | ||
| 48 | <title>Return Value</title> | ||
| 49 | |||
| 50 | <para><function>close</function> returns 0 on success. On error, -1 is | ||
| 51 | returned, and <varname>errno</varname> is set appropriately. Possible error | ||
| 52 | codes are:</para> | ||
| 53 | |||
| 54 | <variablelist> | ||
| 55 | <varlistentry> | ||
| 56 | <term><errorcode>EBADF</errorcode></term> | ||
| 57 | <listitem> | ||
| 58 | <para><parameter>fd</parameter> is not a valid open file descriptor. | ||
| 59 | </para> | ||
| 60 | </listitem> | ||
| 61 | </varlistentry> | ||
| 62 | </variablelist> | ||
| 63 | </refsect1> | ||
| 64 | </refentry> | ||
| @@ -1,78 +0,0 @@ | |||
| 1 | <refentry id="cec-func-ioctl"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>cec ioctl()</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>cec-ioctl</refname> | ||
| 9 | <refpurpose>Control a cec device</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcsynopsisinfo>#include <sys/ioctl.h></funcsynopsisinfo> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 18 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 19 | <paramdef>void *<parameter>argp</parameter></paramdef> | ||
| 20 | </funcprototype> | ||
| 21 | </funcsynopsis> | ||
| 22 | </refsynopsisdiv> | ||
| 23 | |||
| 24 | <refsect1> | ||
| 25 | <title>Arguments</title> | ||
| 26 | |||
| 27 | <variablelist> | ||
| 28 | <varlistentry> | ||
| 29 | <term><parameter>fd</parameter></term> | ||
| 30 | <listitem> | ||
| 31 | <para>&fd;</para> | ||
| 32 | </listitem> | ||
| 33 | </varlistentry> | ||
| 34 | <varlistentry> | ||
| 35 | <term><parameter>request</parameter></term> | ||
| 36 | <listitem> | ||
| 37 | <para>CEC ioctl request code as defined in the cec.h header file, | ||
| 38 | for example CEC_ADAP_G_CAPS.</para> | ||
| 39 | </listitem> | ||
| 40 | </varlistentry> | ||
| 41 | <varlistentry> | ||
| 42 | <term><parameter>argp</parameter></term> | ||
| 43 | <listitem> | ||
| 44 | <para>Pointer to a request-specific structure.</para> | ||
| 45 | </listitem> | ||
| 46 | </varlistentry> | ||
| 47 | </variablelist> | ||
| 48 | </refsect1> | ||
| 49 | |||
| 50 | <refsect1> | ||
| 51 | <title>Description</title> | ||
| 52 | <para> | ||
| 53 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 54 | is currently only available as a staging kernel module. | ||
| 55 | </para> | ||
| 56 | |||
| 57 | <para>The <function>ioctl()</function> function manipulates cec device | ||
| 58 | parameters. The argument <parameter>fd</parameter> must be an open file | ||
| 59 | descriptor.</para> | ||
| 60 | <para>The ioctl <parameter>request</parameter> code specifies the cec | ||
| 61 | function to be called. It has encoded in it whether the argument is an | ||
| 62 | input, output or read/write parameter, and the size of the argument | ||
| 63 | <parameter>argp</parameter> in bytes.</para> | ||
| 64 | <para>Macros and structures definitions specifying cec ioctl requests and | ||
| 65 | their parameters are located in the cec.h header file. All cec ioctl | ||
| 66 | requests, their respective function and parameters are specified in | ||
| 67 | <xref linkend="cec-user-func" />.</para> | ||
| 68 | </refsect1> | ||
| 69 | |||
| 70 | <refsect1> | ||
| 71 | &return-value; | ||
| 72 | |||
| 73 | <para>Request-specific error codes are listed in the | ||
| 74 | individual requests descriptions.</para> | ||
| 75 | <para>When an ioctl that takes an output or read/write parameter fails, | ||
| 76 | the parameter remains unmodified.</para> | ||
| 77 | </refsect1> | ||
| 78 | </refentry> | ||
| @@ -1,104 +0,0 @@ | |||
| 1 | <refentry id="cec-func-open"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>cec open()</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>cec-open</refname> | ||
| 9 | <refpurpose>Open a cec device</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcsynopsisinfo>#include <fcntl.h></funcsynopsisinfo> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>open</function></funcdef> | ||
| 17 | <paramdef>const char *<parameter>device_name</parameter></paramdef> | ||
| 18 | <paramdef>int <parameter>flags</parameter></paramdef> | ||
| 19 | </funcprototype> | ||
| 20 | </funcsynopsis> | ||
| 21 | </refsynopsisdiv> | ||
| 22 | |||
| 23 | <refsect1> | ||
| 24 | <title>Arguments</title> | ||
| 25 | |||
| 26 | <variablelist> | ||
| 27 | <varlistentry> | ||
| 28 | <term><parameter>device_name</parameter></term> | ||
| 29 | <listitem> | ||
| 30 | <para>Device to be opened.</para> | ||
| 31 | </listitem> | ||
| 32 | </varlistentry> | ||
| 33 | <varlistentry> | ||
| 34 | <term><parameter>flags</parameter></term> | ||
| 35 | <listitem> | ||
| 36 | <para>Open flags. Access mode must be <constant>O_RDWR</constant>. | ||
| 37 | </para> | ||
| 38 | <para>When the <constant>O_NONBLOCK</constant> flag is | ||
| 39 | given, the &CEC-RECEIVE; ioctl will return &EAGAIN; when no message is | ||
| 40 | available, and the &CEC-TRANSMIT;, &CEC-ADAP-S-PHYS-ADDR; and | ||
| 41 | &CEC-ADAP-S-LOG-ADDRS; ioctls all act in non-blocking mode.</para> | ||
| 42 | <para>Other flags have no effect.</para> | ||
| 43 | </listitem> | ||
| 44 | </varlistentry> | ||
| 45 | </variablelist> | ||
| 46 | </refsect1> | ||
| 47 | <refsect1> | ||
| 48 | <title>Description</title> | ||
| 49 | <para> | ||
| 50 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 51 | is currently only available as a staging kernel module. | ||
| 52 | </para> | ||
| 53 | |||
| 54 | <para>To open a cec device applications call <function>open()</function> | ||
| 55 | with the desired device name. The function has no side effects; the device | ||
| 56 | configuration remain unchanged.</para> | ||
| 57 | <para>When the device is opened in read-only mode, attempts to modify its | ||
| 58 | configuration will result in an error, and <varname>errno</varname> will be | ||
| 59 | set to <errorcode>EBADF</errorcode>.</para> | ||
| 60 | </refsect1> | ||
| 61 | <refsect1> | ||
| 62 | <title>Return Value</title> | ||
| 63 | |||
| 64 | <para><function>open</function> returns the new file descriptor on success. | ||
| 65 | On error, -1 is returned, and <varname>errno</varname> is set appropriately. | ||
| 66 | Possible error codes include:</para> | ||
| 67 | |||
| 68 | <variablelist> | ||
| 69 | <varlistentry> | ||
| 70 | <term><errorcode>EACCES</errorcode></term> | ||
| 71 | <listitem> | ||
| 72 | <para>The requested access to the file is not allowed.</para> | ||
| 73 | </listitem> | ||
| 74 | </varlistentry> | ||
| 75 | <varlistentry> | ||
| 76 | <term><errorcode>EMFILE</errorcode></term> | ||
| 77 | <listitem> | ||
| 78 | <para>The process already has the maximum number of files open. | ||
| 79 | </para> | ||
| 80 | </listitem> | ||
| 81 | </varlistentry> | ||
| 82 | <varlistentry> | ||
| 83 | <term><errorcode>ENFILE</errorcode></term> | ||
| 84 | <listitem> | ||
| 85 | <para>The system limit on the total number of open files has been | ||
| 86 | reached.</para> | ||
| 87 | </listitem> | ||
| 88 | </varlistentry> | ||
| 89 | <varlistentry> | ||
| 90 | <term><errorcode>ENOMEM</errorcode></term> | ||
| 91 | <listitem> | ||
| 92 | <para>Insufficient kernel memory was available.</para> | ||
| 93 | </listitem> | ||
| 94 | </varlistentry> | ||
| 95 | <varlistentry> | ||
| 96 | <term><errorcode>ENXIO</errorcode></term> | ||
| 97 | <listitem> | ||
| 98 | <para>No device corresponding to this device special file exists. | ||
| 99 | </para> | ||
| 100 | </listitem> | ||
| 101 | </varlistentry> | ||
| 102 | </variablelist> | ||
| 103 | </refsect1> | ||
| 104 | </refentry> | ||
| @@ -1,94 +0,0 @@ | |||
| 1 | <refentry id="cec-func-poll"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>cec poll()</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>cec-poll</refname> | ||
| 9 | <refpurpose>Wait for some event on a file descriptor</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcsynopsisinfo>#include <sys/poll.h></funcsynopsisinfo> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>poll</function></funcdef> | ||
| 17 | <paramdef>struct pollfd *<parameter>ufds</parameter></paramdef> | ||
| 18 | <paramdef>unsigned int <parameter>nfds</parameter></paramdef> | ||
| 19 | <paramdef>int <parameter>timeout</parameter></paramdef> | ||
| 20 | </funcprototype> | ||
| 21 | </funcsynopsis> | ||
| 22 | </refsynopsisdiv> | ||
| 23 | |||
| 24 | <refsect1> | ||
| 25 | <title>Description</title> | ||
| 26 | |||
| 27 | <para> | ||
| 28 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 29 | is currently only available as a staging kernel module. | ||
| 30 | </para> | ||
| 31 | |||
| 32 | <para>With the <function>poll()</function> function applications | ||
| 33 | can wait for CEC events.</para> | ||
| 34 | |||
| 35 | <para>On success <function>poll()</function> returns the number of | ||
| 36 | file descriptors that have been selected (that is, file descriptors | ||
| 37 | for which the <structfield>revents</structfield> field of the | ||
| 38 | respective <structname>pollfd</structname> structure is non-zero). | ||
| 39 | CEC devices set the <constant>POLLIN</constant> and | ||
| 40 | <constant>POLLRDNORM</constant> flags in the | ||
| 41 | <structfield>revents</structfield> field if there are messages in the | ||
| 42 | receive queue. If the transmit queue has room for new messages, the | ||
| 43 | <constant>POLLOUT</constant> and <constant>POLLWRNORM</constant> | ||
| 44 | flags are set. If there are events in the event queue, then the | ||
| 45 | <constant>POLLPRI</constant> flag is set. | ||
| 46 | When the function timed out it returns a value of zero, on | ||
| 47 | failure it returns <returnvalue>-1</returnvalue> and the | ||
| 48 | <varname>errno</varname> variable is set appropriately. | ||
| 49 | </para> | ||
| 50 | |||
| 51 | <para>For more details see the | ||
| 52 | <function>poll()</function> manual page.</para> | ||
| 53 | </refsect1> | ||
| 54 | |||
| 55 | <refsect1> | ||
| 56 | <title>Return Value</title> | ||
| 57 | |||
| 58 | <para>On success, <function>poll()</function> returns the number | ||
| 59 | structures which have non-zero <structfield>revents</structfield> | ||
| 60 | fields, or zero if the call timed out. On error | ||
| 61 | <returnvalue>-1</returnvalue> is returned, and the | ||
| 62 | <varname>errno</varname> variable is set appropriately:</para> | ||
| 63 | |||
| 64 | <variablelist> | ||
| 65 | <varlistentry> | ||
| 66 | <term><errorcode>EBADF</errorcode></term> | ||
| 67 | <listitem> | ||
| 68 | <para>One or more of the <parameter>ufds</parameter> members | ||
| 69 | specify an invalid file descriptor.</para> | ||
| 70 | </listitem> | ||
| 71 | </varlistentry> | ||
| 72 | <varlistentry> | ||
| 73 | <term><errorcode>EFAULT</errorcode></term> | ||
| 74 | <listitem> | ||
| 75 | <para><parameter>ufds</parameter> references an inaccessible | ||
| 76 | memory area.</para> | ||
| 77 | </listitem> | ||
| 78 | </varlistentry> | ||
| 79 | <varlistentry> | ||
| 80 | <term><errorcode>EINTR</errorcode></term> | ||
| 81 | <listitem> | ||
| 82 | <para>The call was interrupted by a signal.</para> | ||
| 83 | </listitem> | ||
| 84 | </varlistentry> | ||
| 85 | <varlistentry> | ||
| 86 | <term><errorcode>EINVAL</errorcode></term> | ||
| 87 | <listitem> | ||
| 88 | <para>The <parameter>nfds</parameter> argument is greater | ||
| 89 | than <constant>OPEN_MAX</constant>.</para> | ||
| 90 | </listitem> | ||
| 91 | </varlistentry> | ||
| 92 | </variablelist> | ||
| 93 | </refsect1> | ||
| 94 | </refentry> | ||
| @@ -1,151 +0,0 @@ | |||
| 1 | <refentry id="cec-ioc-adap-g-caps"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl CEC_ADAP_G_CAPS</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>CEC_ADAP_G_CAPS</refname> | ||
| 9 | <refpurpose>Query device capabilities</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcprototype> | ||
| 15 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 16 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 17 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 18 | <paramdef>struct cec_caps *<parameter>argp</parameter></paramdef> | ||
| 19 | </funcprototype> | ||
| 20 | </funcsynopsis> | ||
| 21 | </refsynopsisdiv> | ||
| 22 | |||
| 23 | <refsect1> | ||
| 24 | <title>Arguments</title> | ||
| 25 | |||
| 26 | <variablelist> | ||
| 27 | <varlistentry> | ||
| 28 | <term><parameter>fd</parameter></term> | ||
| 29 | <listitem> | ||
| 30 | <para>File descriptor returned by | ||
| 31 | <link linkend='cec-func-open'><function>open()</function></link>.</para> | ||
| 32 | </listitem> | ||
| 33 | </varlistentry> | ||
| 34 | <varlistentry> | ||
| 35 | <term><parameter>request</parameter></term> | ||
| 36 | <listitem> | ||
| 37 | <para>CEC_ADAP_G_CAPS</para> | ||
| 38 | </listitem> | ||
| 39 | </varlistentry> | ||
| 40 | <varlistentry> | ||
| 41 | <term><parameter>argp</parameter></term> | ||
| 42 | <listitem> | ||
| 43 | <para></para> | ||
| 44 | </listitem> | ||
| 45 | </varlistentry> | ||
| 46 | </variablelist> | ||
| 47 | </refsect1> | ||
| 48 | |||
| 49 | <refsect1> | ||
| 50 | <title>Description</title> | ||
| 51 | |||
| 52 | <para> | ||
| 53 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 54 | is currently only available as a staging kernel module. | ||
| 55 | </para> | ||
| 56 | |||
| 57 | <para>All cec devices must support the <constant>CEC_ADAP_G_CAPS</constant> | ||
| 58 | ioctl. To query device information, applications call the ioctl with a | ||
| 59 | pointer to a &cec-caps;. The driver fills the structure and returns | ||
| 60 | the information to the application. | ||
| 61 | The ioctl never fails.</para> | ||
| 62 | |||
| 63 | <table pgwide="1" frame="none" id="cec-caps"> | ||
| 64 | <title>struct <structname>cec_caps</structname></title> | ||
| 65 | <tgroup cols="3"> | ||
| 66 | &cs-str; | ||
| 67 | <tbody valign="top"> | ||
| 68 | <row> | ||
| 69 | <entry>char</entry> | ||
| 70 | <entry><structfield>driver[32]</structfield></entry> | ||
| 71 | <entry>The name of the cec adapter driver.</entry> | ||
| 72 | </row> | ||
| 73 | <row> | ||
| 74 | <entry>char</entry> | ||
| 75 | <entry><structfield>name[32]</structfield></entry> | ||
| 76 | <entry>The name of this CEC adapter. The combination <structfield>driver</structfield> | ||
| 77 | and <structfield>name</structfield> must be unique.</entry> | ||
| 78 | </row> | ||
| 79 | <row> | ||
| 80 | <entry>__u32</entry> | ||
| 81 | <entry><structfield>capabilities</structfield></entry> | ||
| 82 | <entry>The capabilities of the CEC adapter, see <xref | ||
| 83 | linkend="cec-capabilities" />.</entry> | ||
| 84 | </row> | ||
| 85 | <row> | ||
| 86 | <entry>__u32</entry> | ||
| 87 | <entry><structfield>version</structfield></entry> | ||
| 88 | <entry>CEC Framework API version, formatted with the | ||
| 89 | <constant>KERNEL_VERSION()</constant> macro.</entry> | ||
| 90 | </row> | ||
| 91 | </tbody> | ||
| 92 | </tgroup> | ||
| 93 | </table> | ||
| 94 | |||
| 95 | <table pgwide="1" frame="none" id="cec-capabilities"> | ||
| 96 | <title>CEC Capabilities Flags</title> | ||
| 97 | <tgroup cols="3"> | ||
| 98 | &cs-def; | ||
| 99 | <tbody valign="top"> | ||
| 100 | <row> | ||
| 101 | <entry><constant>CEC_CAP_PHYS_ADDR</constant></entry> | ||
| 102 | <entry>0x00000001</entry> | ||
| 103 | <entry>Userspace has to configure the physical address by | ||
| 104 | calling &CEC-ADAP-S-PHYS-ADDR;. If this capability isn't set, | ||
| 105 | then setting the physical address is handled by the kernel | ||
| 106 | whenever the EDID is set (for an HDMI receiver) or read (for | ||
| 107 | an HDMI transmitter).</entry> | ||
| 108 | </row> | ||
| 109 | <row> | ||
| 110 | <entry><constant>CEC_CAP_LOG_ADDRS</constant></entry> | ||
| 111 | <entry>0x00000002</entry> | ||
| 112 | <entry>Userspace has to configure the logical addresses by | ||
| 113 | calling &CEC-ADAP-S-LOG-ADDRS;. If this capability isn't set, | ||
| 114 | then the kernel will have configured this.</entry> | ||
| 115 | </row> | ||
| 116 | <row> | ||
| 117 | <entry><constant>CEC_CAP_TRANSMIT</constant></entry> | ||
| 118 | <entry>0x00000004</entry> | ||
| 119 | <entry>Userspace can transmit CEC messages by calling &CEC-TRANSMIT;. This | ||
| 120 | implies that userspace can be a follower as well, since being able to | ||
| 121 | transmit messages is a prerequisite of becoming a follower. If this | ||
| 122 | capability isn't set, then the kernel will handle all CEC transmits | ||
| 123 | and process all CEC messages it receives. | ||
| 124 | </entry> | ||
| 125 | </row> | ||
| 126 | <row> | ||
| 127 | <entry><constant>CEC_CAP_PASSTHROUGH</constant></entry> | ||
| 128 | <entry>0x00000008</entry> | ||
| 129 | <entry>Userspace can use the passthrough mode by | ||
| 130 | calling &CEC-S-MODE;.</entry> | ||
| 131 | </row> | ||
| 132 | <row> | ||
| 133 | <entry><constant>CEC_CAP_RC</constant></entry> | ||
| 134 | <entry>0x00000010</entry> | ||
| 135 | <entry>This adapter supports the remote control protocol.</entry> | ||
| 136 | </row> | ||
| 137 | <row> | ||
| 138 | <entry><constant>CEC_CAP_MONITOR_ALL</constant></entry> | ||
| 139 | <entry>0x00000020</entry> | ||
| 140 | <entry>The CEC hardware can monitor all messages, not just directed and | ||
| 141 | broadcast messages.</entry> | ||
| 142 | </row> | ||
| 143 | </tbody> | ||
| 144 | </tgroup> | ||
| 145 | </table> | ||
| 146 | </refsect1> | ||
| 147 | |||
| 148 | <refsect1> | ||
| 149 | &return-value; | ||
| 150 | </refsect1> | ||
| 151 | </refentry> | ||
| @@ -1,329 +0,0 @@ | |||
| 1 | <refentry id="cec-ioc-adap-g-log-addrs"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>CEC_ADAP_G_LOG_ADDRS</refname> | ||
| 9 | <refname>CEC_ADAP_S_LOG_ADDRS</refname> | ||
| 10 | <refpurpose>Get or set the logical addresses</refpurpose> | ||
| 11 | </refnamediv> | ||
| 12 | |||
| 13 | <refsynopsisdiv> | ||
| 14 | <funcsynopsis> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 18 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 19 | <paramdef>struct cec_log_addrs *<parameter>argp</parameter></paramdef> | ||
| 20 | </funcprototype> | ||
| 21 | </funcsynopsis> | ||
| 22 | </refsynopsisdiv> | ||
| 23 | |||
| 24 | <refsect1> | ||
| 25 | <title>Arguments</title> | ||
| 26 | |||
| 27 | <variablelist> | ||
| 28 | <varlistentry> | ||
| 29 | <term><parameter>fd</parameter></term> | ||
| 30 | <listitem> | ||
| 31 | <para>File descriptor returned by | ||
| 32 | <link linkend='cec-func-open'><function>open()</function></link>.</para> | ||
| 33 | </listitem> | ||
| 34 | </varlistentry> | ||
| 35 | <varlistentry> | ||
| 36 | <term><parameter>request</parameter></term> | ||
| 37 | <listitem> | ||
| 38 | <para>CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS</para> | ||
| 39 | </listitem> | ||
| 40 | </varlistentry> | ||
| 41 | <varlistentry> | ||
| 42 | <term><parameter>argp</parameter></term> | ||
| 43 | <listitem> | ||
| 44 | <para></para> | ||
| 45 | </listitem> | ||
| 46 | </varlistentry> | ||
| 47 | </variablelist> | ||
| 48 | </refsect1> | ||
| 49 | |||
| 50 | <refsect1> | ||
| 51 | <title>Description</title> | ||
| 52 | |||
| 53 | <para> | ||
| 54 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 55 | is currently only available as a staging kernel module. | ||
| 56 | </para> | ||
| 57 | |||
| 58 | <para>To query the current CEC logical addresses, applications call the | ||
| 59 | <constant>CEC_ADAP_G_LOG_ADDRS</constant> ioctl with a pointer to a | ||
| 60 | <structname>cec_log_addrs</structname> structure where the drivers stores the | ||
| 61 | logical addresses.</para> | ||
| 62 | |||
| 63 | <para>To set new logical addresses, applications fill in struct <structname>cec_log_addrs</structname> | ||
| 64 | and call the <constant>CEC_ADAP_S_LOG_ADDRS</constant> ioctl with a pointer to this struct. | ||
| 65 | The <constant>CEC_ADAP_S_LOG_ADDRS</constant> ioctl is only available if | ||
| 66 | <constant>CEC_CAP_LOG_ADDRS</constant> is set (&ENOTTY; is returned otherwise). This ioctl will block until all | ||
| 67 | requested logical addresses have been claimed. <constant>CEC_ADAP_S_LOG_ADDRS</constant> | ||
| 68 | can only be called by a file handle in initiator mode (see &CEC-S-MODE;).</para> | ||
| 69 | |||
| 70 | <table pgwide="1" frame="none" id="cec-log-addrs"> | ||
| 71 | <title>struct <structname>cec_log_addrs</structname></title> | ||
| 72 | <tgroup cols="3"> | ||
| 73 | &cs-str; | ||
| 74 | <tbody valign="top"> | ||
| 75 | <row> | ||
| 76 | <entry>__u8</entry> | ||
| 77 | <entry><structfield>log_addr</structfield>[CEC_MAX_LOG_ADDRS]</entry> | ||
| 78 | <entry>The actual logical addresses that were claimed. This is set by the | ||
| 79 | driver. If no logical address could be claimed, then it is set to | ||
| 80 | <constant>CEC_LOG_ADDR_INVALID</constant>. If this adapter is Unregistered, | ||
| 81 | then <structfield>log_addr[0]</structfield> is set to 0xf and all others to | ||
| 82 | <constant>CEC_LOG_ADDR_INVALID</constant>.</entry> | ||
| 83 | </row> | ||
| 84 | <row> | ||
| 85 | <entry>__u16</entry> | ||
| 86 | <entry><structfield>log_addr_mask</structfield></entry> | ||
| 87 | <entry>The bitmask of all logical addresses this adapter has claimed. | ||
| 88 | If this adapter is Unregistered then <structfield>log_addr_mask</structfield> | ||
| 89 | sets bit 15 and clears all other bits. If this adapter is not configured at all, then | ||
| 90 | <structfield>log_addr_mask</structfield> is set to 0. Set by the driver.</entry> | ||
| 91 | </row> | ||
| 92 | <row> | ||
| 93 | <entry>__u8</entry> | ||
| 94 | <entry><structfield>cec_version</structfield></entry> | ||
| 95 | <entry>The CEC version that this adapter shall use. See | ||
| 96 | <xref linkend="cec-versions" />. | ||
| 97 | Used to implement the <constant>CEC_MSG_CEC_VERSION</constant> and | ||
| 98 | <constant>CEC_MSG_REPORT_FEATURES</constant> messages. Note that | ||
| 99 | <constant>CEC_OP_CEC_VERSION_1_3A</constant> is not allowed | ||
| 100 | by the CEC framework. | ||
| 101 | </entry> | ||
| 102 | </row> | ||
| 103 | <row> | ||
| 104 | <entry>__u8</entry> | ||
| 105 | <entry><structfield>num_log_addrs</structfield></entry> | ||
| 106 | <entry>Number of logical addresses to set up. Must be ≤ | ||
| 107 | <structfield>available_log_addrs</structfield> as returned by | ||
| 108 | &CEC-ADAP-G-CAPS;. All arrays in this structure are only filled up to | ||
| 109 | index <structfield>available_log_addrs</structfield>-1. The remaining | ||
| 110 | array elements will be ignored. Note that the CEC 2.0 standard allows | ||
| 111 | for a maximum of 2 logical addresses, although some hardware has support | ||
| 112 | for more. <constant>CEC_MAX_LOG_ADDRS</constant> is 4. The driver will | ||
| 113 | return the actual number of logical addresses it could claim, which may | ||
| 114 | be less than what was requested. If this field is set to 0, then the | ||
| 115 | CEC adapter shall clear all claimed logical addresses and all other | ||
| 116 | fields will be ignored.</entry> | ||
| 117 | </row> | ||
| 118 | <row> | ||
| 119 | <entry>__u32</entry> | ||
| 120 | <entry><structfield>vendor_id</structfield></entry> | ||
| 121 | <entry>The vendor ID is a 24-bit number that identifies the specific | ||
| 122 | vendor or entity. Based on this ID vendor specific commands may be | ||
| 123 | defined. If you do not want a vendor ID then set it to | ||
| 124 | <constant>CEC_VENDOR_ID_NONE</constant>.</entry> | ||
| 125 | </row> | ||
| 126 | <row> | ||
| 127 | <entry>__u32</entry> | ||
| 128 | <entry><structfield>flags</structfield></entry> | ||
| 129 | <entry>Flags. No flags are defined yet, so set this to 0.</entry> | ||
| 130 | </row> | ||
| 131 | <row> | ||
| 132 | <entry>char</entry> | ||
| 133 | <entry><structfield>osd_name</structfield>[15]</entry> | ||
| 134 | <entry>The On-Screen Display name as is returned by the | ||
| 135 | <constant>CEC_MSG_SET_OSD_NAME</constant> message.</entry> | ||
| 136 | </row> | ||
| 137 | <row> | ||
| 138 | <entry>__u8</entry> | ||
| 139 | <entry><structfield>primary_device_type</structfield>[CEC_MAX_LOG_ADDRS]</entry> | ||
| 140 | <entry>Primary device type for each logical address. See | ||
| 141 | <xref linkend="cec-prim-dev-types" /> for possible types.</entry> | ||
| 142 | </row> | ||
| 143 | <row> | ||
| 144 | <entry>__u8</entry> | ||
| 145 | <entry><structfield>log_addr_type</structfield>[CEC_MAX_LOG_ADDRS]</entry> | ||
| 146 | <entry>Logical address types. See <xref linkend="cec-log-addr-types" /> for | ||
| 147 | possible types. The driver will update this with the actual logical address | ||
| 148 | type that it claimed (e.g. it may have to fallback to | ||
| 149 | <constant>CEC_LOG_ADDR_TYPE_UNREGISTERED</constant>).</entry> | ||
| 150 | </row> | ||
| 151 | <row> | ||
| 152 | <entry>__u8</entry> | ||
| 153 | <entry><structfield>all_device_types</structfield>[CEC_MAX_LOG_ADDRS]</entry> | ||
| 154 | <entry>CEC 2.0 specific: all device types. See <xref linkend="cec-all-dev-types-flags" />. | ||
| 155 | Used to implement the <constant>CEC_MSG_REPORT_FEATURES</constant> message. | ||
| 156 | This field is ignored if <structfield>cec_version</structfield> < | ||
| 157 | <constant>CEC_OP_CEC_VERSION_2_0</constant>.</entry> | ||
| 158 | </row> | ||
| 159 | <row> | ||
| 160 | <entry>__u8</entry> | ||
| 161 | <entry><structfield>features</structfield>[CEC_MAX_LOG_ADDRS][12]</entry> | ||
| 162 | <entry>Features for each logical address. Used to implement the | ||
| 163 | <constant>CEC_MSG_REPORT_FEATURES</constant> message. The 12 bytes include | ||
| 164 | both the RC Profile and the Device Features. | ||
| 165 | This field is ignored if <structfield>cec_version</structfield> < | ||
| 166 | <constant>CEC_OP_CEC_VERSION_2_0</constant>.</entry> | ||
| 167 | </row> | ||
| 168 | </tbody> | ||
| 169 | </tgroup> | ||
| 170 | </table> | ||
| 171 | |||
| 172 | <table pgwide="1" frame="none" id="cec-versions"> | ||
| 173 | <title>CEC Versions</title> | ||
| 174 | <tgroup cols="3"> | ||
| 175 | &cs-def; | ||
| 176 | <tbody valign="top"> | ||
| 177 | <row> | ||
| 178 | <entry><constant>CEC_OP_CEC_VERSION_1_3A</constant></entry> | ||
| 179 | <entry>4</entry> | ||
| 180 | <entry>CEC version according to the HDMI 1.3a standard.</entry> | ||
| 181 | </row> | ||
| 182 | <row> | ||
| 183 | <entry><constant>CEC_OP_CEC_VERSION_1_4B</constant></entry> | ||
| 184 | <entry>5</entry> | ||
| 185 | <entry>CEC version according to the HDMI 1.4b standard.</entry> | ||
| 186 | </row> | ||
| 187 | <row> | ||
| 188 | <entry><constant>CEC_OP_CEC_VERSION_2_0</constant></entry> | ||
| 189 | <entry>6</entry> | ||
| 190 | <entry>CEC version according to the HDMI 2.0 standard.</entry> | ||
| 191 | </row> | ||
| 192 | </tbody> | ||
| 193 | </tgroup> | ||
| 194 | </table> | ||
| 195 | |||
| 196 | <table pgwide="1" frame="none" id="cec-prim-dev-types"> | ||
| 197 | <title>CEC Primary Device Types</title> | ||
| 198 | <tgroup cols="3"> | ||
| 199 | &cs-def; | ||
| 200 | <tbody valign="top"> | ||
| 201 | <row> | ||
| 202 | <entry><constant>CEC_OP_PRIM_DEVTYPE_TV</constant></entry> | ||
| 203 | <entry>0</entry> | ||
| 204 | <entry>Use for a TV.</entry> | ||
| 205 | </row> | ||
| 206 | <row> | ||
| 207 | <entry><constant>CEC_OP_PRIM_DEVTYPE_RECORD</constant></entry> | ||
| 208 | <entry>1</entry> | ||
| 209 | <entry>Use for a recording device.</entry> | ||
| 210 | </row> | ||
| 211 | <row> | ||
| 212 | <entry><constant>CEC_OP_PRIM_DEVTYPE_TUNER</constant></entry> | ||
| 213 | <entry>3</entry> | ||
| 214 | <entry>Use for a device with a tuner.</entry> | ||
| 215 | </row> | ||
| 216 | <row> | ||
| 217 | <entry><constant>CEC_OP_PRIM_DEVTYPE_PLAYBACK</constant></entry> | ||
| 218 | <entry>4</entry> | ||
| 219 | <entry>Use for a playback device.</entry> | ||
| 220 | </row> | ||
| 221 | <row> | ||
| 222 | <entry><constant>CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM</constant></entry> | ||
| 223 | <entry>5</entry> | ||
| 224 | <entry>Use for an audio system (e.g. an audio/video receiver).</entry> | ||
| 225 | </row> | ||
| 226 | <row> | ||
| 227 | <entry><constant>CEC_OP_PRIM_DEVTYPE_SWITCH</constant></entry> | ||
| 228 | <entry>6</entry> | ||
| 229 | <entry>Use for a CEC switch.</entry> | ||
| 230 | </row> | ||
| 231 | <row> | ||
| 232 | <entry><constant>CEC_OP_PRIM_DEVTYPE_VIDEOPROC</constant></entry> | ||
| 233 | <entry>7</entry> | ||
| 234 | <entry>Use for a video processor device.</entry> | ||
| 235 | </row> | ||
| 236 | </tbody> | ||
| 237 | </tgroup> | ||
| 238 | </table> | ||
| 239 | |||
| 240 | <table pgwide="1" frame="none" id="cec-log-addr-types"> | ||
| 241 | <title>CEC Logical Address Types</title> | ||
| 242 | <tgroup cols="3"> | ||
| 243 | &cs-def; | ||
| 244 | <tbody valign="top"> | ||
| 245 | <row> | ||
| 246 | <entry><constant>CEC_LOG_ADDR_TYPE_TV</constant></entry> | ||
| 247 | <entry>0</entry> | ||
| 248 | <entry>Use for a TV.</entry> | ||
| 249 | </row> | ||
| 250 | <row> | ||
| 251 | <entry><constant>CEC_LOG_ADDR_TYPE_RECORD</constant></entry> | ||
| 252 | <entry>1</entry> | ||
| 253 | <entry>Use for a recording device.</entry> | ||
| 254 | </row> | ||
| 255 | <row> | ||
| 256 | <entry><constant>CEC_LOG_ADDR_TYPE_TUNER</constant></entry> | ||
| 257 | <entry>2</entry> | ||
| 258 | <entry>Use for a tuner device.</entry> | ||
| 259 | </row> | ||
| 260 | <row> | ||
| 261 | <entry><constant>CEC_LOG_ADDR_TYPE_PLAYBACK</constant></entry> | ||
| 262 | <entry>3</entry> | ||
| 263 | <entry>Use for a playback device.</entry> | ||
| 264 | </row> | ||
| 265 | <row> | ||
| 266 | <entry><constant>CEC_LOG_ADDR_TYPE_AUDIOSYSTEM</constant></entry> | ||
| 267 | <entry>4</entry> | ||
| 268 | <entry>Use for an audio system device.</entry> | ||
| 269 | </row> | ||
| 270 | <row> | ||
| 271 | <entry><constant>CEC_LOG_ADDR_TYPE_SPECIFIC</constant></entry> | ||
| 272 | <entry>5</entry> | ||
| 273 | <entry>Use for a second TV or for a video processor device.</entry> | ||
| 274 | </row> | ||
| 275 | <row> | ||
| 276 | <entry><constant>CEC_LOG_ADDR_TYPE_UNREGISTERED</constant></entry> | ||
| 277 | <entry>6</entry> | ||
| 278 | <entry>Use this if you just want to remain unregistered. | ||
| 279 | Used for pure CEC switches or CDC-only devices (CDC: | ||
| 280 | Capability Discovery and Control).</entry> | ||
| 281 | </row> | ||
| 282 | </tbody> | ||
| 283 | </tgroup> | ||
| 284 | </table> | ||
| 285 | |||
| 286 | <table pgwide="1" frame="none" id="cec-all-dev-types-flags"> | ||
| 287 | <title>CEC All Device Types Flags</title> | ||
| 288 | <tgroup cols="3"> | ||
| 289 | &cs-def; | ||
| 290 | <tbody valign="top"> | ||
| 291 | <row> | ||
| 292 | <entry><constant>CEC_OP_ALL_DEVTYPE_TV</constant></entry> | ||
| 293 | <entry>0x80</entry> | ||
| 294 | <entry>This supports the TV type.</entry> | ||
| 295 | </row> | ||
| 296 | <row> | ||
| 297 | <entry><constant>CEC_OP_ALL_DEVTYPE_RECORD</constant></entry> | ||
| 298 | <entry>0x40</entry> | ||
| 299 | <entry>This supports the Recording type.</entry> | ||
| 300 | </row> | ||
| 301 | <row> | ||
| 302 | <entry><constant>CEC_OP_ALL_DEVTYPE_TUNER</constant></entry> | ||
| 303 | <entry>0x20</entry> | ||
| 304 | <entry>This supports the Tuner type.</entry> | ||
| 305 | </row> | ||
| 306 | <row> | ||
| 307 | <entry><constant>CEC_OP_ALL_DEVTYPE_PLAYBACK</constant></entry> | ||
| 308 | <entry>0x10</entry> | ||
| 309 | <entry>This supports the Playback type.</entry> | ||
| 310 | </row> | ||
| 311 | <row> | ||
| 312 | <entry><constant>CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM</constant></entry> | ||
| 313 | <entry>0x08</entry> | ||
| 314 | <entry>This supports the Audio System type.</entry> | ||
| 315 | </row> | ||
| 316 | <row> | ||
| 317 | <entry><constant>CEC_OP_ALL_DEVTYPE_SWITCH</constant></entry> | ||
| 318 | <entry>0x04</entry> | ||
| 319 | <entry>This supports the CEC Switch or Video Processing type.</entry> | ||
| 320 | </row> | ||
| 321 | </tbody> | ||
| 322 | </tgroup> | ||
| 323 | </table> | ||
| 324 | </refsect1> | ||
| 325 | |||
| 326 | <refsect1> | ||
| 327 | &return-value; | ||
| 328 | </refsect1> | ||
| 329 | </refentry> | ||
| @@ -1,86 +0,0 @@ | |||
| 1 | <refentry id="cec-ioc-adap-g-phys-addr"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl CEC_ADAP_G_PHYS_ADDR, CEC_ADAP_S_PHYS_ADDR</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>CEC_ADAP_G_PHYS_ADDR</refname> | ||
| 9 | <refname>CEC_ADAP_S_PHYS_ADDR</refname> | ||
| 10 | <refpurpose>Get or set the physical address</refpurpose> | ||
| 11 | </refnamediv> | ||
| 12 | |||
| 13 | <refsynopsisdiv> | ||
| 14 | <funcsynopsis> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 18 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 19 | <paramdef>__u16 *<parameter>argp</parameter></paramdef> | ||
| 20 | </funcprototype> | ||
| 21 | </funcsynopsis> | ||
| 22 | </refsynopsisdiv> | ||
| 23 | |||
| 24 | <refsect1> | ||
| 25 | <title>Arguments</title> | ||
| 26 | |||
| 27 | <variablelist> | ||
| 28 | <varlistentry> | ||
| 29 | <term><parameter>fd</parameter></term> | ||
| 30 | <listitem> | ||
| 31 | <para>File descriptor returned by | ||
| 32 | <link linkend='cec-func-open'><function>open()</function></link>.</para> | ||
| 33 | </listitem> | ||
| 34 | </varlistentry> | ||
| 35 | <varlistentry> | ||
| 36 | <term><parameter>request</parameter></term> | ||
| 37 | <listitem> | ||
| 38 | <para>CEC_ADAP_G_PHYS_ADDR, CEC_ADAP_S_PHYS_ADDR</para> | ||
| 39 | </listitem> | ||
| 40 | </varlistentry> | ||
| 41 | <varlistentry> | ||
| 42 | <term><parameter>argp</parameter></term> | ||
| 43 | <listitem> | ||
| 44 | <para></para> | ||
| 45 | </listitem> | ||
| 46 | </varlistentry> | ||
| 47 | </variablelist> | ||
| 48 | </refsect1> | ||
| 49 | |||
| 50 | <refsect1> | ||
| 51 | <title>Description</title> | ||
| 52 | |||
| 53 | <para> | ||
| 54 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 55 | is currently only available as a staging kernel module. | ||
| 56 | </para> | ||
| 57 | |||
| 58 | <para>To query the current physical address applications call the | ||
| 59 | <constant>CEC_ADAP_G_PHYS_ADDR</constant> ioctl with a pointer to an __u16 | ||
| 60 | where the driver stores the physical address.</para> | ||
| 61 | |||
| 62 | <para>To set a new physical address applications store the physical address in | ||
| 63 | an __u16 and call the <constant>CEC_ADAP_S_PHYS_ADDR</constant> ioctl with a | ||
| 64 | pointer to this integer. <constant>CEC_ADAP_S_PHYS_ADDR</constant> is only | ||
| 65 | available if <constant>CEC_CAP_PHYS_ADDR</constant> is set (&ENOTTY; will be returned | ||
| 66 | otherwise). <constant>CEC_ADAP_S_PHYS_ADDR</constant> | ||
| 67 | can only be called by a file handle in initiator mode (see &CEC-S-MODE;), if not | ||
| 68 | &EBUSY; will be returned.</para> | ||
| 69 | |||
| 70 | <para>The physical address is a 16-bit number where each group of 4 bits | ||
| 71 | represent a digit of the physical address a.b.c.d where the most significant | ||
| 72 | 4 bits represent 'a'. The CEC root device (usually the TV) has address 0.0.0.0. | ||
| 73 | Every device that is hooked up to an input of the TV has address a.0.0.0 (where | ||
| 74 | 'a' is ≥ 1), devices hooked up to those in turn have addresses a.b.0.0, etc. | ||
| 75 | So a topology of up to 5 devices deep is supported. The physical address a | ||
| 76 | device shall use is stored in the EDID of the sink.</para> | ||
| 77 | |||
| 78 | <para>For example, the EDID for each HDMI input of the TV will have a different | ||
| 79 | physical address of the form a.0.0.0 that the sources will read out and use as | ||
| 80 | their physical address.</para> | ||
| 81 | </refsect1> | ||
| 82 | |||
| 83 | <refsect1> | ||
| 84 | &return-value; | ||
| 85 | </refsect1> | ||
| 86 | </refentry> | ||
| @@ -1,202 +0,0 @@ | |||
| 1 | <refentry id="cec-ioc-g-event"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl CEC_DQEVENT</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>CEC_DQEVENT</refname> | ||
| 9 | <refpurpose>Dequeue a CEC event</refpurpose> | ||
| 10 | </refnamediv> | ||
| 11 | |||
| 12 | <refsynopsisdiv> | ||
| 13 | <funcsynopsis> | ||
| 14 | <funcprototype> | ||
| 15 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 16 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 17 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 18 | <paramdef>struct cec_event *<parameter>argp</parameter></paramdef> | ||
| 19 | </funcprototype> | ||
| 20 | </funcsynopsis> | ||
| 21 | </refsynopsisdiv> | ||
| 22 | |||
| 23 | <refsect1> | ||
| 24 | <title>Arguments</title> | ||
| 25 | |||
| 26 | <variablelist> | ||
| 27 | <varlistentry> | ||
| 28 | <term><parameter>fd</parameter></term> | ||
| 29 | <listitem> | ||
| 30 | <para>File descriptor returned by | ||
| 31 | <link linkend='cec-func-open'><function>open()</function></link>.</para> | ||
| 32 | </listitem> | ||
| 33 | </varlistentry> | ||
| 34 | <varlistentry> | ||
| 35 | <term><parameter>request</parameter></term> | ||
| 36 | <listitem> | ||
| 37 | <para>CEC_DQEVENT</para> | ||
| 38 | </listitem> | ||
| 39 | </varlistentry> | ||
| 40 | <varlistentry> | ||
| 41 | <term><parameter>argp</parameter></term> | ||
| 42 | <listitem> | ||
| 43 | <para></para> | ||
| 44 | </listitem> | ||
| 45 | </varlistentry> | ||
| 46 | </variablelist> | ||
| 47 | </refsect1> | ||
| 48 | |||
| 49 | <refsect1> | ||
| 50 | <title>Description</title> | ||
| 51 | |||
| 52 | <para> | ||
| 53 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 54 | is currently only available as a staging kernel module. | ||
| 55 | </para> | ||
| 56 | |||
| 57 | <para>CEC devices can send asynchronous events. These can be retrieved by calling | ||
| 58 | the <constant>CEC_DQEVENT</constant> ioctl. If the file descriptor is in non-blocking | ||
| 59 | mode and no event is pending, then it will return -1 and set errno to the &EAGAIN;.</para> | ||
| 60 | |||
| 61 | <para>The internal event queues are per-filehandle and per-event type. If there is | ||
| 62 | no more room in a queue then the last event is overwritten with the new one. This | ||
| 63 | means that intermediate results can be thrown away but that the latest event is always | ||
| 64 | available. This also means that is it possible to read two successive events that have | ||
| 65 | the same value (e.g. two CEC_EVENT_STATE_CHANGE events with the same state). In that | ||
| 66 | case the intermediate state changes were lost but it is guaranteed that the state | ||
| 67 | did change in between the two events.</para> | ||
| 68 | |||
| 69 | <table pgwide="1" frame="none" id="cec-event-state-change"> | ||
| 70 | <title>struct <structname>cec_event_state_change</structname></title> | ||
| 71 | <tgroup cols="3"> | ||
| 72 | &cs-str; | ||
| 73 | <tbody valign="top"> | ||
| 74 | <row> | ||
| 75 | <entry>__u16</entry> | ||
| 76 | <entry><structfield>phys_addr</structfield></entry> | ||
| 77 | <entry>The current physical address.</entry> | ||
| 78 | </row> | ||
| 79 | <row> | ||
| 80 | <entry>__u16</entry> | ||
| 81 | <entry><structfield>log_addr_mask</structfield></entry> | ||
| 82 | <entry>The current set of claimed logical addresses.</entry> | ||
| 83 | </row> | ||
| 84 | </tbody> | ||
| 85 | </tgroup> | ||
| 86 | </table> | ||
| 87 | |||
| 88 | <table pgwide="1" frame="none" id="cec-event-lost-msgs"> | ||
| 89 | <title>struct <structname>cec_event_lost_msgs</structname></title> | ||
| 90 | <tgroup cols="3"> | ||
| 91 | &cs-str; | ||
| 92 | <tbody valign="top"> | ||
| 93 | <row> | ||
| 94 | <entry>__u32</entry> | ||
| 95 | <entry><structfield>lost_msgs</structfield></entry> | ||
| 96 | <entry>Set to the number of lost messages since the filehandle | ||
| 97 | was opened or since the last time this event was dequeued for | ||
| 98 | this filehandle. The messages lost are the oldest messages. So | ||
| 99 | when a new message arrives and there is no more room, then the | ||
| 100 | oldest message is discarded to make room for the new one. The | ||
| 101 | internal size of the message queue guarantees that all messages | ||
| 102 | received in the last two seconds will be stored. Since messages | ||
| 103 | should be replied to within a second according to the CEC | ||
| 104 | specification, this is more than enough. | ||
| 105 | </entry> | ||
| 106 | </row> | ||
| 107 | </tbody> | ||
| 108 | </tgroup> | ||
| 109 | </table> | ||
| 110 | |||
| 111 | <table pgwide="1" frame="none" id="cec-event"> | ||
| 112 | <title>struct <structname>cec_event</structname></title> | ||
| 113 | <tgroup cols="4"> | ||
| 114 | &cs-str; | ||
| 115 | <tbody valign="top"> | ||
| 116 | <row> | ||
| 117 | <entry>__u64</entry> | ||
| 118 | <entry><structfield>ts</structfield></entry> | ||
| 119 | <entry>Timestamp of the event in ns.</entry> | ||
| 120 | <entry></entry> | ||
| 121 | </row> | ||
| 122 | <row> | ||
| 123 | <entry>__u32</entry> | ||
| 124 | <entry><structfield>event</structfield></entry> | ||
| 125 | <entry>The CEC event type, see <xref linkend="cec-events" />.</entry> | ||
| 126 | <entry></entry> | ||
| 127 | </row> | ||
| 128 | <row> | ||
| 129 | <entry>__u32</entry> | ||
| 130 | <entry><structfield>flags</structfield></entry> | ||
| 131 | <entry>Event flags, see <xref linkend="cec-event-flags" />.</entry> | ||
| 132 | <entry></entry> | ||
| 133 | </row> | ||
| 134 | <row> | ||
| 135 | <entry>union</entry> | ||
| 136 | <entry>(anonymous)</entry> | ||
| 137 | <entry></entry> | ||
| 138 | <entry></entry> | ||
| 139 | </row> | ||
| 140 | <row> | ||
| 141 | <entry></entry> | ||
| 142 | <entry>struct cec_event_state_change</entry> | ||
| 143 | <entry><structfield>state_change</structfield></entry> | ||
| 144 | <entry>The new adapter state as sent by the <constant>CEC_EVENT_STATE_CHANGE</constant> | ||
| 145 | event.</entry> | ||
| 146 | </row> | ||
| 147 | <row> | ||
| 148 | <entry></entry> | ||
| 149 | <entry>struct cec_event_lost_msgs</entry> | ||
| 150 | <entry><structfield>lost_msgs</structfield></entry> | ||
| 151 | <entry>The number of lost messages as sent by the <constant>CEC_EVENT_LOST_MSGS</constant> | ||
| 152 | event.</entry> | ||
| 153 | </row> | ||
| 154 | </tbody> | ||
| 155 | </tgroup> | ||
| 156 | </table> | ||
| 157 | |||
| 158 | <table pgwide="1" frame="none" id="cec-events"> | ||
| 159 | <title>CEC Events Types</title> | ||
| 160 | <tgroup cols="3"> | ||
| 161 | &cs-def; | ||
| 162 | <tbody valign="top"> | ||
| 163 | <row> | ||
| 164 | <entry><constant>CEC_EVENT_STATE_CHANGE</constant></entry> | ||
| 165 | <entry>1</entry> | ||
| 166 | <entry>Generated when the CEC Adapter's state changes. When open() is | ||
| 167 | called an initial event will be generated for that filehandle with the | ||
| 168 | CEC Adapter's state at that time. | ||
| 169 | </entry> | ||
| 170 | </row> | ||
| 171 | <row> | ||
| 172 | <entry><constant>CEC_EVENT_LOST_MSGS</constant></entry> | ||
| 173 | <entry>2</entry> | ||
| 174 | <entry>Generated if one or more CEC messages were lost because the | ||
| 175 | application didn't dequeue CEC messages fast enough.</entry> | ||
| 176 | </row> | ||
| 177 | </tbody> | ||
| 178 | </tgroup> | ||
| 179 | </table> | ||
| 180 | |||
| 181 | <table pgwide="1" frame="none" id="cec-event-flags"> | ||
| 182 | <title>CEC Event Flags</title> | ||
| 183 | <tgroup cols="3"> | ||
| 184 | &cs-def; | ||
| 185 | <tbody valign="top"> | ||
| 186 | <row> | ||
| 187 | <entry><constant>CEC_EVENT_FL_INITIAL_VALUE</constant></entry> | ||
| 188 | <entry>1</entry> | ||
| 189 | <entry>Set for the initial events that are generated when the device is | ||
| 190 | opened. See the table above for which events do this. This allows | ||
| 191 | applications to learn the initial state of the CEC adapter at open() | ||
| 192 | time.</entry> | ||
| 193 | </row> | ||
| 194 | </tbody> | ||
| 195 | </tgroup> | ||
| 196 | </table> | ||
| 197 | </refsect1> | ||
| 198 | |||
| 199 | <refsect1> | ||
| 200 | &return-value; | ||
| 201 | </refsect1> | ||
| 202 | </refentry> | ||
| @@ -1,255 +0,0 @@ | |||
| 1 | <refentry id="cec-ioc-g-mode"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl CEC_G_MODE, CEC_S_MODE</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>CEC_G_MODE</refname> | ||
| 9 | <refname>CEC_S_MODE</refname> | ||
| 10 | <refpurpose>Get or set exclusive use of the CEC adapter</refpurpose> | ||
| 11 | </refnamediv> | ||
| 12 | |||
| 13 | <refsynopsisdiv> | ||
| 14 | <funcsynopsis> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 18 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 19 | <paramdef>__u32 *<parameter>argp</parameter></paramdef> | ||
| 20 | </funcprototype> | ||
| 21 | </funcsynopsis> | ||
| 22 | </refsynopsisdiv> | ||
| 23 | |||
| 24 | <refsect1> | ||
| 25 | <title>Arguments</title> | ||
| 26 | |||
| 27 | <variablelist> | ||
| 28 | <varlistentry> | ||
| 29 | <term><parameter>fd</parameter></term> | ||
| 30 | <listitem> | ||
| 31 | <para>File descriptor returned by | ||
| 32 | <link linkend='cec-func-open'><function>open()</function></link>.</para> | ||
| 33 | </listitem> | ||
| 34 | </varlistentry> | ||
| 35 | <varlistentry> | ||
| 36 | <term><parameter>request</parameter></term> | ||
| 37 | <listitem> | ||
| 38 | <para>CEC_G_MODE, CEC_S_MODE</para> | ||
| 39 | </listitem> | ||
| 40 | </varlistentry> | ||
| 41 | <varlistentry> | ||
| 42 | <term><parameter>argp</parameter></term> | ||
| 43 | <listitem> | ||
| 44 | <para></para> | ||
| 45 | </listitem> | ||
| 46 | </varlistentry> | ||
| 47 | </variablelist> | ||
| 48 | </refsect1> | ||
| 49 | |||
| 50 | <refsect1> | ||
| 51 | <title>Description</title> | ||
| 52 | |||
| 53 | <para> | ||
| 54 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 55 | is currently only available as a staging kernel module. | ||
| 56 | </para> | ||
| 57 | |||
| 58 | <para>By default any filehandle can use &CEC-TRANSMIT; and &CEC-RECEIVE;, but | ||
| 59 | in order to prevent applications from stepping on each others toes it must be possible | ||
| 60 | to obtain exclusive access to the CEC adapter. This ioctl sets the filehandle | ||
| 61 | to initiator and/or follower mode which can be exclusive depending on the chosen | ||
| 62 | mode. The initiator is the filehandle that is used | ||
| 63 | to initiate messages, i.e. it commands other CEC devices. The follower is the filehandle | ||
| 64 | that receives messages sent to the CEC adapter and processes them. The same filehandle | ||
| 65 | can be both initiator and follower, or this role can be taken by two different | ||
| 66 | filehandles.</para> | ||
| 67 | |||
| 68 | <para>When a CEC message is received, then the CEC framework will decide how | ||
| 69 | it will be processed. If the message is a reply to an earlier transmitted message, | ||
| 70 | then the reply is sent back to the filehandle that is waiting for it. In addition | ||
| 71 | the CEC framework will process it.</para> | ||
| 72 | |||
| 73 | <para>If the message is not a reply, then the CEC framework will process it | ||
| 74 | first. If there is no follower, then the message is just discarded and a feature | ||
| 75 | abort is sent back to the initiator if the framework couldn't process it. If there | ||
| 76 | is a follower, then the message is passed on to the follower who will use | ||
| 77 | &CEC-RECEIVE; to dequeue the new message. The framework expects the follower to | ||
| 78 | make the right decisions.</para> | ||
| 79 | |||
| 80 | <para>The CEC framework will process core messages unless requested otherwise | ||
| 81 | by the follower. The follower can enable the passthrough mode. In that case, the | ||
| 82 | CEC framework will pass on most core messages without processing them and | ||
| 83 | the follower will have to implement those messages. There are some messages | ||
| 84 | that the core will always process, regardless of the passthrough mode. See | ||
| 85 | <xref linkend="cec-core-processing" /> for details.</para> | ||
| 86 | |||
| 87 | <para>If there is no initiator, then any CEC filehandle can use &CEC-TRANSMIT;. | ||
| 88 | If there is an exclusive initiator then only that initiator can call &CEC-TRANSMIT;. | ||
| 89 | The follower can of course always call &CEC-TRANSMIT;.</para> | ||
| 90 | |||
| 91 | <para>Available initiator modes are:</para> | ||
| 92 | |||
| 93 | <table pgwide="1" frame="none" id="cec-mode-initiator"> | ||
| 94 | <title>Initiator Modes</title> | ||
| 95 | <tgroup cols="3"> | ||
| 96 | &cs-def; | ||
| 97 | <tbody valign="top"> | ||
| 98 | <row> | ||
| 99 | <entry><constant>CEC_MODE_NO_INITIATOR</constant></entry> | ||
| 100 | <entry>0x0</entry> | ||
| 101 | <entry>This is not an initiator, i.e. it cannot transmit CEC messages | ||
| 102 | or make any other changes to the CEC adapter.</entry> | ||
| 103 | </row> | ||
| 104 | <row> | ||
| 105 | <entry><constant>CEC_MODE_INITIATOR</constant></entry> | ||
| 106 | <entry>0x1</entry> | ||
| 107 | <entry>This is an initiator (the default when the device is opened) and it | ||
| 108 | can transmit CEC messages and make changes to the CEC adapter, unless there | ||
| 109 | is an exclusive initiator.</entry> | ||
| 110 | </row> | ||
| 111 | <row> | ||
| 112 | <entry><constant>CEC_MODE_EXCL_INITIATOR</constant></entry> | ||
| 113 | <entry>0x2</entry> | ||
| 114 | <entry>This is an exclusive initiator and this file descriptor is the only one | ||
| 115 | that can transmit CEC messages and make changes to the CEC adapter. If someone | ||
| 116 | else is already the exclusive initiator then an attempt to become one will return | ||
| 117 | the &EBUSY; error.</entry> | ||
| 118 | </row> | ||
| 119 | </tbody> | ||
| 120 | </tgroup> | ||
| 121 | </table> | ||
| 122 | |||
| 123 | <para>Available follower modes are:</para> | ||
| 124 | |||
| 125 | <table pgwide="1" frame="none" id="cec-mode-follower"> | ||
| 126 | <title>Follower Modes</title> | ||
| 127 | <tgroup cols="3"> | ||
| 128 | &cs-def; | ||
| 129 | <tbody valign="top"> | ||
| 130 | <row> | ||
| 131 | <entry><constant>CEC_MODE_NO_FOLLOWER</constant></entry> | ||
| 132 | <entry>0x00</entry> | ||
| 133 | <entry>This is not a follower (the default when the device is opened).</entry> | ||
| 134 | </row> | ||
| 135 | <row> | ||
| 136 | <entry><constant>CEC_MODE_FOLLOWER</constant></entry> | ||
| 137 | <entry>0x10</entry> | ||
| 138 | <entry>This is a follower and it will receive CEC messages unless there is | ||
| 139 | an exclusive follower. You cannot become a follower if <constant>CEC_CAP_TRANSMIT</constant> | ||
| 140 | is not set or if <constant>CEC_MODE_NO_INITIATOR</constant> was specified, | ||
| 141 | &EINVAL; is returned in that case.</entry> | ||
| 142 | </row> | ||
| 143 | <row> | ||
| 144 | <entry><constant>CEC_MODE_EXCL_FOLLOWER</constant></entry> | ||
| 145 | <entry>0x20</entry> | ||
| 146 | <entry>This is an exclusive follower and only this file descriptor will receive | ||
| 147 | CEC messages for processing. If someone else is already the exclusive follower | ||
| 148 | then an attempt to become one will return the &EBUSY; error. You cannot become | ||
| 149 | a follower if <constant>CEC_CAP_TRANSMIT</constant> is not set or if | ||
| 150 | <constant>CEC_MODE_NO_INITIATOR</constant> was specified, &EINVAL; is returned | ||
| 151 | in that case.</entry> | ||
| 152 | </row> | ||
| 153 | <row> | ||
| 154 | <entry><constant>CEC_MODE_EXCL_FOLLOWER_PASSTHRU</constant></entry> | ||
| 155 | <entry>0x30</entry> | ||
| 156 | <entry>This is an exclusive follower and only this file descriptor will receive | ||
| 157 | CEC messages for processing. In addition it will put the CEC device into | ||
| 158 | passthrough mode, allowing the exclusive follower to handle most core messages | ||
| 159 | instead of relying on the CEC framework for that. If someone else is already the | ||
| 160 | exclusive follower then an attempt to become one will return the &EBUSY; error. | ||
| 161 | You cannot become a follower if <constant>CEC_CAP_TRANSMIT</constant> | ||
| 162 | is not set or if <constant>CEC_MODE_NO_INITIATOR</constant> was specified, | ||
| 163 | &EINVAL; is returned in that case.</entry> | ||
| 164 | </row> | ||
| 165 | <row> | ||
| 166 | <entry><constant>CEC_MODE_MONITOR</constant></entry> | ||
| 167 | <entry>0xe0</entry> | ||
| 168 | <entry>Put the file descriptor into monitor mode. Can only be used in combination | ||
| 169 | with <constant>CEC_MODE_NO_INITIATOR</constant>, otherwise &EINVAL; will be | ||
| 170 | returned. In monitor mode all messages this CEC device transmits and all messages | ||
| 171 | it receives (both broadcast messages and directed messages for one its logical | ||
| 172 | addresses) will be reported. This is very useful for debugging. This is only | ||
| 173 | allowed if the process has the <constant>CAP_NET_ADMIN</constant> | ||
| 174 | capability. If that is not set, then &EPERM; is returned.</entry> | ||
| 175 | </row> | ||
| 176 | <row> | ||
| 177 | <entry><constant>CEC_MODE_MONITOR_ALL</constant></entry> | ||
| 178 | <entry>0xf0</entry> | ||
| 179 | <entry>Put the file descriptor into 'monitor all' mode. Can only be used in combination | ||
| 180 | with <constant>CEC_MODE_NO_INITIATOR</constant>, otherwise &EINVAL; will be | ||
| 181 | returned. In 'monitor all' mode all messages this CEC device transmits and all messages | ||
| 182 | it receives, including directed messages for other CEC devices will be reported. This | ||
| 183 | is very useful for debugging, but not all devices support this. This mode requires that | ||
| 184 | the <constant>CEC_CAP_MONITOR_ALL</constant> capability is set, otherwise &EINVAL; is | ||
| 185 | returned. This is only allowed if the process has the <constant>CAP_NET_ADMIN</constant> | ||
| 186 | capability. If that is not set, then &EPERM; is returned.</entry> | ||
| 187 | </row> | ||
| 188 | </tbody> | ||
| 189 | </tgroup> | ||
| 190 | </table> | ||
| 191 | |||
| 192 | <para>Core message processing details:</para> | ||
| 193 | |||
| 194 | <table pgwide="1" frame="none" id="cec-core-processing"> | ||
| 195 | <title>Core Message Processing</title> | ||
| 196 | <tgroup cols="2"> | ||
| 197 | &cs-def; | ||
| 198 | <tbody valign="top"> | ||
| 199 | <row> | ||
| 200 | <entry><constant>CEC_MSG_GET_CEC_VERSION</constant></entry> | ||
| 201 | <entry>When in passthrough mode this message has to be handled by userspace, | ||
| 202 | otherwise the core will return the CEC version that was set with &CEC-ADAP-S-LOG-ADDRS;.</entry> | ||
| 203 | </row> | ||
| 204 | <row> | ||
| 205 | <entry><constant>CEC_MSG_GIVE_DEVICE_VENDOR_ID</constant></entry> | ||
| 206 | <entry>When in passthrough mode this message has to be handled by userspace, | ||
| 207 | otherwise the core will return the vendor ID that was set with &CEC-ADAP-S-LOG-ADDRS;.</entry> | ||
| 208 | </row> | ||
| 209 | <row> | ||
| 210 | <entry><constant>CEC_MSG_ABORT</constant></entry> | ||
| 211 | <entry>When in passthrough mode this message has to be handled by userspace, | ||
| 212 | otherwise the core will return a feature refused message as per the specification.</entry> | ||
| 213 | </row> | ||
| 214 | <row> | ||
| 215 | <entry><constant>CEC_MSG_GIVE_PHYSICAL_ADDR</constant></entry> | ||
| 216 | <entry>When in passthrough mode this message has to be handled by userspace, | ||
| 217 | otherwise the core will report the current physical address.</entry> | ||
| 218 | </row> | ||
| 219 | <row> | ||
| 220 | <entry><constant>CEC_MSG_GIVE_OSD_NAME</constant></entry> | ||
| 221 | <entry>When in passthrough mode this message has to be handled by userspace, | ||
| 222 | otherwise the core will report the current OSD name as was set with | ||
| 223 | &CEC-ADAP-S-LOG-ADDRS;.</entry> | ||
| 224 | </row> | ||
| 225 | <row> | ||
| 226 | <entry><constant>CEC_MSG_GIVE_FEATURES</constant></entry> | ||
| 227 | <entry>When in passthrough mode this message has to be handled by userspace, | ||
| 228 | otherwise the core will report the current features as was set with | ||
| 229 | &CEC-ADAP-S-LOG-ADDRS; or the message is ignore if the CEC version was | ||
| 230 | older than 2.0.</entry> | ||
| 231 | </row> | ||
| 232 | <row> | ||
| 233 | <entry><constant>CEC_MSG_USER_CONTROL_PRESSED</constant></entry> | ||
| 234 | <entry>If <constant>CEC_CAP_RC</constant> is set, then generate a remote control | ||
| 235 | key press. This message is always passed on to userspace.</entry> | ||
| 236 | </row> | ||
| 237 | <row> | ||
| 238 | <entry><constant>CEC_MSG_USER_CONTROL_RELEASED</constant></entry> | ||
| 239 | <entry>If <constant>CEC_CAP_RC</constant> is set, then generate a remote control | ||
| 240 | key release. This message is always passed on to userspace.</entry> | ||
| 241 | </row> | ||
| 242 | <row> | ||
| 243 | <entry><constant>CEC_MSG_REPORT_PHYSICAL_ADDR</constant></entry> | ||
| 244 | <entry>The CEC framework will make note of the reported physical address | ||
| 245 | and then just pass the message on to userspace.</entry> | ||
| 246 | </row> | ||
| 247 | </tbody> | ||
| 248 | </tgroup> | ||
| 249 | </table> | ||
| 250 | </refsect1> | ||
| 251 | |||
| 252 | <refsect1> | ||
| 253 | &return-value; | ||
| 254 | </refsect1> | ||
| 255 | </refentry> | ||
| @@ -1,274 +0,0 @@ | |||
| 1 | <refentry id="cec-ioc-receive"> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>ioctl CEC_RECEIVE, CEC_TRANSMIT</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | |||
| 7 | <refnamediv> | ||
| 8 | <refname>CEC_RECEIVE</refname> | ||
| 9 | <refname>CEC_TRANSMIT</refname> | ||
| 10 | <refpurpose>Receive or transmit a CEC message</refpurpose> | ||
| 11 | </refnamediv> | ||
| 12 | |||
| 13 | <refsynopsisdiv> | ||
| 14 | <funcsynopsis> | ||
| 15 | <funcprototype> | ||
| 16 | <funcdef>int <function>ioctl</function></funcdef> | ||
| 17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
| 18 | <paramdef>int <parameter>request</parameter></paramdef> | ||
| 19 | <paramdef>struct cec_msg *<parameter>argp</parameter></paramdef> | ||
| 20 | </funcprototype> | ||
| 21 | </funcsynopsis> | ||
| 22 | </refsynopsisdiv> | ||
| 23 | |||
| 24 | <refsect1> | ||
| 25 | <title>Arguments</title> | ||
| 26 | |||
| 27 | <variablelist> | ||
| 28 | <varlistentry> | ||
| 29 | <term><parameter>fd</parameter></term> | ||
| 30 | <listitem> | ||
| 31 | <para>File descriptor returned by | ||
| 32 | <link linkend='cec-func-open'><function>open()</function></link>.</para> | ||
| 33 | </listitem> | ||
| 34 | </varlistentry> | ||
| 35 | <varlistentry> | ||
| 36 | <term><parameter>request</parameter></term> | ||
| 37 | <listitem> | ||
| 38 | <para>CEC_RECEIVE, CEC_TRANSMIT</para> | ||
| 39 | </listitem> | ||
| 40 | </varlistentry> | ||
| 41 | <varlistentry> | ||
| 42 | <term><parameter>argp</parameter></term> | ||
| 43 | <listitem> | ||
| 44 | <para></para> | ||
| 45 | </listitem> | ||
| 46 | </varlistentry> | ||
| 47 | </variablelist> | ||
| 48 | </refsect1> | ||
| 49 | |||
| 50 | <refsect1> | ||
| 51 | <title>Description</title> | ||
| 52 | |||
| 53 | <para> | ||
| 54 | Note: this documents the proposed CEC API. This API is not yet finalized and | ||
| 55 | is currently only available as a staging kernel module. | ||
| 56 | </para> | ||
| 57 | |||
| 58 | <para>To receive a CEC message the application has to fill in the | ||
| 59 | <structname>cec_msg</structname> structure and pass it to the | ||
| 60 | <constant>CEC_RECEIVE</constant> ioctl. <constant>CEC_RECEIVE</constant> is | ||
| 61 | only available if <constant>CEC_CAP_RECEIVE</constant> is set. If the | ||
| 62 | file descriptor is in non-blocking mode and there are no received | ||
| 63 | messages pending, then it will return -1 and set errno to the &EAGAIN;. | ||
| 64 | If the file descriptor is in blocking mode and <structfield>timeout</structfield> | ||
| 65 | is non-zero and no message arrived within <structfield>timeout</structfield> | ||
| 66 | milliseconds, then it will return -1 and set errno to the &ETIMEDOUT;.</para> | ||
| 67 | |||
| 68 | <para>To send a CEC message the application has to fill in the | ||
| 69 | <structname>cec_msg</structname> structure and pass it to the | ||
| 70 | <constant>CEC_TRANSMIT</constant> ioctl. <constant>CEC_TRANSMIT</constant> is | ||
| 71 | only available if <constant>CEC_CAP_TRANSMIT</constant> is set. | ||
| 72 | If there is no more room in the transmit queue, then it will return | ||
| 73 | -1 and set errno to the &EBUSY;.</para> | ||
| 74 | |||
| 75 | <table pgwide="1" frame="none" id="cec-msg"> | ||
| 76 | <title>struct <structname>cec_msg</structname></title> | ||
| 77 | <tgroup cols="3"> | ||
| 78 | &cs-str; | ||
| 79 | <tbody valign="top"> | ||
| 80 | <row> | ||
| 81 | <entry>__u64</entry> | ||
| 82 | <entry><structfield>ts</structfield></entry> | ||
| 83 | <entry>Timestamp of when the message was transmitted in ns in the case | ||
| 84 | of <constant>CEC_TRANSMIT</constant> with <structfield>reply</structfield> | ||
| 85 | set to 0, or the timestamp of the received message in all other cases.</entry> | ||
| 86 | </row> | ||
| 87 | <row> | ||
| 88 | <entry>__u32</entry> | ||
| 89 | <entry><structfield>len</structfield></entry> | ||
| 90 | <entry>The length of the message. For <constant>CEC_TRANSMIT</constant> this | ||
| 91 | is filled in by the application. The driver will fill this in for | ||
| 92 | <constant>CEC_RECEIVE</constant> and for <constant>CEC_TRANSMIT</constant> | ||
| 93 | it will be filled in with the length of the reply message if | ||
| 94 | <structfield>reply</structfield> was set.</entry> | ||
| 95 | </row> | ||
| 96 | <row> | ||
| 97 | <entry>__u32</entry> | ||
| 98 | <entry><structfield>timeout</structfield></entry> | ||
| 99 | <entry>The timeout in milliseconds. This is the time the device will wait for a message to | ||
| 100 | be received before timing out. If it is set to 0, then it will wait indefinitely when it | ||
| 101 | is called by <constant>CEC_RECEIVE</constant>. If it is 0 and it is called by | ||
| 102 | <constant>CEC_TRANSMIT</constant>, then it will be replaced by 1000 if the | ||
| 103 | <structfield>reply</structfield> is non-zero or ignored if <structfield>reply</structfield> | ||
| 104 | is 0.</entry> | ||
| 105 | </row> | ||
| 106 | <row> | ||
| 107 | <entry>__u32</entry> | ||
| 108 | <entry><structfield>sequence</structfield></entry> | ||
| 109 | <entry>The sequence number is automatically assigned by the CEC | ||
| 110 | framework for all transmitted messages. It can be later used by the | ||
| 111 | framework to generate an event if a reply for a message was | ||
| 112 | requested and the message was transmitted in a non-blocking mode. | ||
| 113 | </entry> | ||
| 114 | </row> | ||
| 115 | <row> | ||
| 116 | <entry>__u32</entry> | ||
| 117 | <entry><structfield>flags</structfield></entry> | ||
| 118 | <entry>Flags. No flags are defined yet, so set this to 0.</entry> | ||
| 119 | </row> | ||
| 120 | <row> | ||
| 121 | <entry>__u8</entry> | ||
| 122 | <entry><structfield>rx_status</structfield></entry> | ||
| 123 | <entry>The status bits of the received message. See <xref linkend="cec-rx-status" /> | ||
| 124 | for the possible status values. It is 0 if this message was transmitted, not | ||
| 125 | received, unless this is the reply to a transmitted message. In that case both | ||
| 126 | <structfield>rx_status</structfield> and <structfield>tx_status</structfield> | ||
| 127 | are set.</entry> | ||
| 128 | </row> | ||
| 129 | <row> | ||
| 130 | <entry>__u8</entry> | ||
| 131 | <entry><structfield>tx_status</structfield></entry> | ||
| 132 | <entry>The status bits of the transmitted message. See <xref linkend="cec-tx-status" /> | ||
| 133 | for the possible status values. It is 0 if this messages was received, not | ||
| 134 | transmitted.</entry> | ||
| 135 | </row> | ||
| 136 | <row> | ||
| 137 | <entry>__u8</entry> | ||
| 138 | <entry><structfield>msg</structfield>[16]</entry> | ||
| 139 | <entry>The message payload. For <constant>CEC_TRANSMIT</constant> this | ||
| 140 | is filled in by the application. The driver will fill this in for | ||
| 141 | <constant>CEC_RECEIVE</constant> and for <constant>CEC_TRANSMIT</constant> | ||
| 142 | it will be filled in with the payload of the reply message if | ||
| 143 | <structfield>reply</structfield> was set.</entry> | ||
| 144 | </row> | ||
| 145 | <row> | ||
| 146 | <entry>__u8</entry> | ||
| 147 | <entry><structfield>reply</structfield></entry> | ||
| 148 | <entry>Wait until this message is replied. If <structfield>reply</structfield> | ||
| 149 | is 0 and the <structfield>timeout</structfield> is 0, then don't wait for a reply but | ||
| 150 | return after transmitting the message. If there was an error as indicated by a non-zero | ||
| 151 | <structfield>tx_status</structfield> field, then <structfield>reply</structfield> and | ||
| 152 | <structfield>timeout</structfield> are both set to 0 by the driver. Ignored by | ||
| 153 | <constant>CEC_RECEIVE</constant>. The case where <structfield>reply</structfield> is 0 | ||
| 154 | (this is the opcode for the Feature Abort message) and <structfield>timeout</structfield> | ||
| 155 | is non-zero is specifically allowed to send a message and wait up to <structfield>timeout</structfield> | ||
| 156 | milliseconds for a Feature Abort reply. In this case <structfield>rx_status</structfield> | ||
| 157 | will either be set to <constant>CEC_RX_STATUS_TIMEOUT</constant> or | ||
| 158 | <constant>CEC_RX_STATUS_FEATURE_ABORT</constant>.</entry> | ||
| 159 | </row> | ||
| 160 | <row> | ||
| 161 | <entry>__u8</entry> | ||
| 162 | <entry><structfield>tx_arb_lost_cnt</structfield></entry> | ||
| 163 | <entry>A counter of the number of transmit attempts that resulted in the | ||
| 164 | Arbitration Lost error. This is only set if the hardware supports this, otherwise | ||
| 165 | it is always 0. This counter is only valid if the <constant>CEC_TX_STATUS_ARB_LOST</constant> | ||
| 166 | status bit is set.</entry> | ||
| 167 | </row> | ||
| 168 | <row> | ||
| 169 | <entry>__u8</entry> | ||
| 170 | <entry><structfield>tx_nack_cnt</structfield></entry> | ||
| 171 | <entry>A counter of the number of transmit attempts that resulted in the | ||
| 172 | Not Acknowledged error. This is only set if the hardware supports this, otherwise | ||
| 173 | it is always 0. This counter is only valid if the <constant>CEC_TX_STATUS_NACK</constant> | ||
| 174 | status bit is set.</entry> | ||
| 175 | </row> | ||
| 176 | <row> | ||
| 177 | <entry>__u8</entry> | ||
| 178 | <entry><structfield>tx_low_drive_cnt</structfield></entry> | ||
| 179 | <entry>A counter of the number of transmit attempts that resulted in the | ||
| 180 | Arbitration Lost error. This is only set if the hardware supports this, otherwise | ||
| 181 | it is always 0. This counter is only valid if the <constant>CEC_TX_STATUS_LOW_DRIVE</constant> | ||
| 182 | status bit is set.</entry> | ||
| 183 | </row> | ||
| 184 | <row> | ||
| 185 | <entry>__u8</entry> | ||
| 186 | <entry><structfield>tx_error_cnt</structfield></entry> | ||
| 187 | <entry>A counter of the number of transmit errors other than Arbitration Lost | ||
| 188 | or Not Acknowledged. This is only set if the hardware supports this, otherwise | ||
| 189 | it is always 0. This counter is only valid if the <constant>CEC_TX_STATUS_ERROR</constant> | ||
| 190 | status bit is set.</entry> | ||
| 191 | </row> | ||
| 192 | </tbody> | ||
| 193 | </tgroup> | ||
| 194 | </table> | ||
| 195 | |||
| 196 | <table pgwide="1" frame="none" id="cec-tx-status"> | ||
| 197 | <title>CEC Transmit Status</title> | ||
| 198 | <tgroup cols="3"> | ||
| 199 | &cs-def; | ||
| 200 | <tbody valign="top"> | ||
| 201 | <row> | ||
| 202 | <entry><constant>CEC_TX_STATUS_OK</constant></entry> | ||
| 203 | <entry>0x01</entry> | ||
| 204 | <entry>The message was transmitted successfully. This is mutually exclusive with | ||
| 205 | <constant>CEC_TX_STATUS_MAX_RETRIES</constant>. Other bits can still be set if | ||
| 206 | earlier attempts met with failure before the transmit was eventually successful.</entry> | ||
| 207 | </row> | ||
| 208 | <row> | ||
| 209 | <entry><constant>CEC_TX_STATUS_ARB_LOST</constant></entry> | ||
| 210 | <entry>0x02</entry> | ||
| 211 | <entry>CEC line arbitration was lost.</entry> | ||
| 212 | </row> | ||
| 213 | <row> | ||
| 214 | <entry><constant>CEC_TX_STATUS_NACK</constant></entry> | ||
| 215 | <entry>0x04</entry> | ||
| 216 | <entry>Message was not acknowledged.</entry> | ||
| 217 | </row> | ||
| 218 | <row> | ||
| 219 | <entry><constant>CEC_TX_STATUS_LOW_DRIVE</constant></entry> | ||
| 220 | <entry>0x08</entry> | ||
| 221 | <entry>Low drive was detected on the CEC bus. This indicates that a follower | ||
| 222 | detected an error on the bus and requests a retransmission.</entry> | ||
| 223 | </row> | ||
| 224 | <row> | ||
| 225 | <entry><constant>CEC_TX_STATUS_ERROR</constant></entry> | ||
| 226 | <entry>0x10</entry> | ||
| 227 | <entry>Some error occurred. This is used for any errors that do not | ||
| 228 | fit the previous two, either because the hardware could not tell | ||
| 229 | which error occurred, or because the hardware tested for other conditions | ||
| 230 | besides those two.</entry> | ||
| 231 | </row> | ||
| 232 | <row> | ||
| 233 | <entry><constant>CEC_TX_STATUS_MAX_RETRIES</constant></entry> | ||
| 234 | <entry>0x20</entry> | ||
| 235 | <entry>The transmit failed after one or more retries. This status bit is mutually | ||
| 236 | exclusive with <constant>CEC_TX_STATUS_OK</constant>. Other bits can still be set | ||
| 237 | to explain which failures were seen.</entry> | ||
| 238 | </row> | ||
| 239 | </tbody> | ||
| 240 | </tgroup> | ||
| 241 | </table> | ||
| 242 | |||
| 243 | <table pgwide="1" frame="none" id="cec-rx-status"> | ||
| 244 | <title>CEC Receive Status</title> | ||
| 245 | <tgroup cols="3"> | ||
| 246 | &cs-def; | ||
| 247 | <tbody valign="top"> | ||
| 248 | <row> | ||
| 249 | <entry><constant>CEC_RX_STATUS_OK</constant></entry> | ||
| 250 | <entry>0x01</entry> | ||
| 251 | <entry>The message was received successfully.</entry> | ||
| 252 | </row> | ||
| 253 | <row> | ||
| 254 | <entry><constant>CEC_RX_STATUS_TIMEOUT</constant></entry> | ||
| 255 | <entry>0x02</entry> | ||
| 256 | <entry>The reply to an earlier transmitted message timed out.</entry> | ||
| 257 | </row> | ||
| 258 | <row> | ||
| 259 | <entry><constant>CEC_RX_STATUS_FEATURE_ABORT</constant></entry> | ||
| 260 | <entry>0x04</entry> | ||
| 261 | <entry>The message was received successfully but the reply was | ||
| 262 | <constant>CEC_MSG_FEATURE_ABORT</constant>. This status is only | ||
| 263 | set if this message was the reply to an earlier transmitted | ||
| 264 | message.</entry> | ||
| 265 | </row> | ||
| 266 | </tbody> | ||
| 267 | </tgroup> | ||
| 268 | </table> | ||
| 269 | </refsect1> | ||
| 270 | |||
| 271 | <refsect1> | ||
| 272 | &return-value; | ||
| 273 | </refsect1> | ||
| 274 | </refentry> | ||
| @@ -1,1102 +0,0 @@ | |||
| 1 | <title>Common API Elements</title> | ||
| 2 | |||
| 3 | <para>Programming a V4L2 device consists of these | ||
| 4 | steps:</para> | ||
| 5 | |||
| 6 | <itemizedlist> | ||
| 7 | <listitem> | ||
| 8 | <para>Opening the device</para> | ||
| 9 | </listitem> | ||
| 10 | <listitem> | ||
| 11 | <para>Changing device properties, selecting a video and audio | ||
| 12 | input, video standard, picture brightness a. o.</para> | ||
| 13 | </listitem> | ||
| 14 | <listitem> | ||
| 15 | <para>Negotiating a data format</para> | ||
| 16 | </listitem> | ||
| 17 | <listitem> | ||
| 18 | <para>Negotiating an input/output method</para> | ||
| 19 | </listitem> | ||
| 20 | <listitem> | ||
| 21 | <para>The actual input/output loop</para> | ||
| 22 | </listitem> | ||
| 23 | <listitem> | ||
| 24 | <para>Closing the device</para> | ||
| 25 | </listitem> | ||
| 26 | </itemizedlist> | ||
| 27 | |||
| 28 | <para>In practice most steps are optional and can be executed out of | ||
| 29 | order. It depends on the V4L2 device type, you can read about the | ||
| 30 | details in <xref linkend="devices" />. In this chapter we will discuss | ||
| 31 | the basic concepts applicable to all devices.</para> | ||
| 32 | |||
| 33 | <section id="open"> | ||
| 34 | <title>Opening and Closing Devices</title> | ||
| 35 | |||
| 36 | <section> | ||
| 37 | <title>Device Naming</title> | ||
| 38 | |||
| 39 | <para>V4L2 drivers are implemented as kernel modules, loaded | ||
| 40 | manually by the system administrator or automatically when a device is | ||
| 41 | first discovered. The driver modules plug into the "videodev" kernel | ||
| 42 | module. It provides helper functions and a common application | ||
| 43 | interface specified in this document.</para> | ||
| 44 | |||
| 45 | <para>Each driver thus loaded registers one or more device nodes | ||
| 46 | with major number 81 and a minor number between 0 and 255. Minor numbers | ||
| 47 | are allocated dynamically unless the kernel is compiled with the kernel | ||
| 48 | option CONFIG_VIDEO_FIXED_MINOR_RANGES. In that case minor numbers are | ||
| 49 | allocated in ranges depending on the device node type (video, radio, etc.).</para> | ||
| 50 | |||
| 51 | <para>Many drivers support "video_nr", "radio_nr" or "vbi_nr" | ||
| 52 | module options to select specific video/radio/vbi node numbers. This allows | ||
| 53 | the user to request that the device node is named e.g. /dev/video5 instead | ||
| 54 | of leaving it to chance. When the driver supports multiple devices of the same | ||
| 55 | type more than one device node number can be assigned, separated by commas: | ||
| 56 | <informalexample> | ||
| 57 | <screen> | ||
| 58 | > modprobe mydriver video_nr=0,1 radio_nr=0,1</screen> | ||
| 59 | </informalexample></para> | ||
| 60 | |||
| 61 | <para>In <filename>/etc/modules.conf</filename> this may be | ||
| 62 | written as: <informalexample> | ||
| 63 | <screen> | ||
| 64 | options mydriver video_nr=0,1 radio_nr=0,1 | ||
| 65 | </screen> | ||
| 66 | </informalexample> When no device node number is given as module | ||
| 67 | option the driver supplies a default.</para> | ||
| 68 | |||
| 69 | <para>Normally udev will create the device nodes in /dev automatically | ||
| 70 | for you. If udev is not installed, then you need to enable the | ||
| 71 | CONFIG_VIDEO_FIXED_MINOR_RANGES kernel option in order to be able to correctly | ||
| 72 | relate a minor number to a device node number. I.e., you need to be certain | ||
| 73 | that minor number 5 maps to device node name video5. With this kernel option | ||
| 74 | different device types have different minor number ranges. These ranges are | ||
| 75 | listed in <xref linkend="devices" />. | ||
| 76 | </para> | ||
| 77 | |||
| 78 | <para>The creation of character special files (with | ||
| 79 | <application>mknod</application>) is a privileged operation and | ||
| 80 | devices cannot be opened by major and minor number. That means | ||
| 81 | applications cannot <emphasis>reliable</emphasis> scan for loaded or | ||
| 82 | installed drivers. The user must enter a device name, or the | ||
| 83 | application can try the conventional device names.</para> | ||
| 84 | </section> | ||
| 85 | |||
| 86 | <section id="related"> | ||
| 87 | <title>Related Devices</title> | ||
| 88 | |||
| 89 | <para>Devices can support several functions. For example | ||
| 90 | video capturing, VBI capturing and radio support.</para> | ||
| 91 | |||
| 92 | <para>The V4L2 API creates different nodes for each of these functions.</para> | ||
| 93 | |||
| 94 | <para>The V4L2 API was designed with the idea that one device node could support | ||
| 95 | all functions. However, in practice this never worked: this 'feature' | ||
| 96 | was never used by applications and many drivers did not support it and if | ||
| 97 | they did it was certainly never tested. In addition, switching a device | ||
| 98 | node between different functions only works when using the streaming I/O | ||
| 99 | API, not with the read()/write() API.</para> | ||
| 100 | |||
| 101 | <para>Today each device node supports just one function.</para> | ||
| 102 | |||
| 103 | <para>Besides video input or output the hardware may also | ||
| 104 | support audio sampling or playback. If so, these functions are | ||
| 105 | implemented as ALSA PCM devices with optional ALSA audio mixer | ||
| 106 | devices.</para> | ||
| 107 | |||
| 108 | <para>One problem with all these devices is that the V4L2 API | ||
| 109 | makes no provisions to find these related devices. Some really | ||
| 110 | complex devices use the Media Controller (see <xref linkend="media_controller" />) | ||
| 111 | which can be used for this purpose. But most drivers do not use it, | ||
| 112 | and while some code exists that uses sysfs to discover related devices | ||
| 113 | (see libmedia_dev in the <ulink url="http://git.linuxtv.org/cgit.cgi/v4l-utils.git/">v4l-utils</ulink> | ||
| 114 | git repository), there is no library yet that can provide a single API towards | ||
| 115 | both Media Controller-based devices and devices that do not use the Media Controller. | ||
| 116 | If you want to work on this please write to the linux-media mailing list: &v4l-ml;.</para> | ||
| 117 | </section> | ||
| 118 | |||
| 119 | <section> | ||
| 120 | <title>Multiple Opens</title> | ||
| 121 | |||
| 122 | <para>V4L2 devices can be opened more than once.<footnote><para> | ||
| 123 | There are still some old and obscure drivers that have not been updated to | ||
| 124 | allow for multiple opens. This implies that for such drivers &func-open; can | ||
| 125 | return an &EBUSY; when the device is already in use.</para></footnote> | ||
| 126 | When this is supported by the driver, users can for example start a | ||
| 127 | "panel" application to change controls like brightness or audio | ||
| 128 | volume, while another application captures video and audio. In other words, panel | ||
| 129 | applications are comparable to an ALSA audio mixer application. | ||
| 130 | Just opening a V4L2 device should not change the state of the device.<footnote> | ||
| 131 | <para>Unfortunately, opening a radio device often switches the state of the | ||
| 132 | device to radio mode in many drivers. This behavior should be fixed eventually | ||
| 133 | as it violates the V4L2 specification.</para></footnote></para> | ||
| 134 | |||
| 135 | <para>Once an application has allocated the memory buffers needed for | ||
| 136 | streaming data (by calling the &VIDIOC-REQBUFS; or &VIDIOC-CREATE-BUFS; ioctls, | ||
| 137 | or implicitly by calling the &func-read; or &func-write; functions) that | ||
| 138 | application (filehandle) becomes the owner of the device. It is no longer | ||
| 139 | allowed to make changes that would affect the buffer sizes (e.g. by calling | ||
| 140 | the &VIDIOC-S-FMT; ioctl) and other applications are no longer allowed to allocate | ||
| 141 | buffers or start or stop streaming. The &EBUSY; will be returned instead.</para> | ||
| 142 | |||
| 143 | <para>Merely opening a V4L2 device does not grant exclusive | ||
| 144 | access.<footnote> | ||
| 145 | <para>Drivers could recognize the | ||
| 146 | <constant>O_EXCL</constant> open flag. Presently this is not required, | ||
| 147 | so applications cannot know if it really works.</para> | ||
| 148 | </footnote> Initiating data exchange however assigns the right | ||
| 149 | to read or write the requested type of data, and to change related | ||
| 150 | properties, to this file descriptor. Applications can request | ||
| 151 | additional access privileges using the priority mechanism described in | ||
| 152 | <xref linkend="app-pri" />.</para> | ||
| 153 | </section> | ||
| 154 | |||
| 155 | <section> | ||
| 156 | <title>Shared Data Streams</title> | ||
| 157 | |||
| 158 | <para>V4L2 drivers should not support multiple applications | ||
| 159 | reading or writing the same data stream on a device by copying | ||
| 160 | buffers, time multiplexing or similar means. This is better handled by | ||
| 161 | a proxy application in user space.</para> | ||
| 162 | </section> | ||
| 163 | |||
| 164 | <section> | ||
| 165 | <title>Functions</title> | ||
| 166 | |||
| 167 | <para>To open and close V4L2 devices applications use the | ||
| 168 | &func-open; and &func-close; function, respectively. Devices are | ||
| 169 | programmed using the &func-ioctl; function as explained in the | ||
| 170 | following sections.</para> | ||
| 171 | </section> | ||
| 172 | </section> | ||
| 173 | |||
| 174 | <section id="querycap"> | ||
| 175 | <title>Querying Capabilities</title> | ||
| 176 | |||
| 177 | <para>Because V4L2 covers a wide variety of devices not all | ||
| 178 | aspects of the API are equally applicable to all types of devices. | ||
| 179 | Furthermore devices of the same type have different capabilities and | ||
| 180 | this specification permits the omission of a few complicated and less | ||
| 181 | important parts of the API.</para> | ||
| 182 | |||
| 183 | <para>The &VIDIOC-QUERYCAP; ioctl is available to check if the kernel | ||
| 184 | device is compatible with this specification, and to query the <link | ||
| 185 | linkend="devices">functions</link> and <link linkend="io">I/O | ||
| 186 | methods</link> supported by the device.</para> | ||
| 187 | |||
| 188 | <para>Starting with kernel version 3.1, VIDIOC-QUERYCAP will return the | ||
| 189 | V4L2 API version used by the driver, with generally matches the Kernel version. | ||
| 190 | There's no need of using &VIDIOC-QUERYCAP; to check if a specific ioctl is | ||
| 191 | supported, the V4L2 core now returns ENOTTY if a driver doesn't provide | ||
| 192 | support for an ioctl.</para> | ||
| 193 | |||
| 194 | <para>Other features can be queried | ||
| 195 | by calling the respective ioctl, for example &VIDIOC-ENUMINPUT; | ||
| 196 | to learn about the number, types and names of video connectors on the | ||
| 197 | device. Although abstraction is a major objective of this API, the | ||
| 198 | &VIDIOC-QUERYCAP; ioctl also allows driver specific applications to reliably identify | ||
| 199 | the driver.</para> | ||
| 200 | |||
| 201 | <para>All V4L2 drivers must support | ||
| 202 | <constant>VIDIOC_QUERYCAP</constant>. Applications should always call | ||
| 203 | this ioctl after opening the device.</para> | ||
| 204 | </section> | ||
| 205 | |||
| 206 | <section id="app-pri"> | ||
| 207 | <title>Application Priority</title> | ||
| 208 | |||
| 209 | <para>When multiple applications share a device it may be | ||
| 210 | desirable to assign them different priorities. Contrary to the | ||
| 211 | traditional "rm -rf /" school of thought a video recording application | ||
| 212 | could for example block other applications from changing video | ||
| 213 | controls or switching the current TV channel. Another objective is to | ||
| 214 | permit low priority applications working in background, which can be | ||
| 215 | preempted by user controlled applications and automatically regain | ||
| 216 | control of the device at a later time.</para> | ||
| 217 | |||
| 218 | <para>Since these features cannot be implemented entirely in user | ||
| 219 | space V4L2 defines the &VIDIOC-G-PRIORITY; and &VIDIOC-S-PRIORITY; | ||
| 220 | ioctls to request and query the access priority associate with a file | ||
| 221 | descriptor. Opening a device assigns a medium priority, compatible | ||
| 222 | with earlier versions of V4L2 and drivers not supporting these ioctls. | ||
| 223 | Applications requiring a different priority will usually call | ||
| 224 | <constant>VIDIOC_S_PRIORITY</constant> after verifying the device with | ||
| 225 | the &VIDIOC-QUERYCAP; ioctl.</para> | ||
| 226 | |||
| 227 | <para>Ioctls changing driver properties, such as &VIDIOC-S-INPUT;, | ||
| 228 | return an &EBUSY; after another application obtained higher priority.</para> | ||
| 229 | </section> | ||
| 230 | |||
| 231 | <section id="video"> | ||
| 232 | <title>Video Inputs and Outputs</title> | ||
| 233 | |||
| 234 | <para>Video inputs and outputs are physical connectors of a | ||
| 235 | device. These can be for example RF connectors (antenna/cable), CVBS | ||
| 236 | a.k.a. Composite Video, S-Video or RGB connectors. Video and VBI | ||
| 237 | capture devices have inputs. Video and VBI output devices have outputs, | ||
| 238 | at least one each. Radio devices have no video inputs or outputs.</para> | ||
| 239 | |||
| 240 | <para>To learn about the number and attributes of the | ||
| 241 | available inputs and outputs applications can enumerate them with the | ||
| 242 | &VIDIOC-ENUMINPUT; and &VIDIOC-ENUMOUTPUT; ioctl, respectively. The | ||
| 243 | &v4l2-input; returned by the <constant>VIDIOC_ENUMINPUT</constant> | ||
| 244 | ioctl also contains signal status information applicable when the | ||
| 245 | current video input is queried.</para> | ||
| 246 | |||
| 247 | <para>The &VIDIOC-G-INPUT; and &VIDIOC-G-OUTPUT; ioctls return the | ||
| 248 | index of the current video input or output. To select a different | ||
| 249 | input or output applications call the &VIDIOC-S-INPUT; and | ||
| 250 | &VIDIOC-S-OUTPUT; ioctls. Drivers must implement all the input ioctls | ||
| 251 | when the device has one or more inputs, all the output ioctls when the | ||
| 252 | device has one or more outputs.</para> | ||
| 253 | |||
| 254 | <example> | ||
| 255 | <title>Information about the current video input</title> | ||
| 256 | |||
| 257 | <programlisting> | ||
| 258 | &v4l2-input; input; | ||
| 259 | int index; | ||
| 260 | |||
| 261 | if (-1 == ioctl(fd, &VIDIOC-G-INPUT;, &index)) { | ||
| 262 | perror("VIDIOC_G_INPUT"); | ||
| 263 | exit(EXIT_FAILURE); | ||
| 264 | } | ||
| 265 | |||
| 266 | memset(&input, 0, sizeof(input)); | ||
| 267 | input.index = index; | ||
| 268 | |||
| 269 | if (-1 == ioctl(fd, &VIDIOC-ENUMINPUT;, &input)) { | ||
| 270 | perror("VIDIOC_ENUMINPUT"); | ||
| 271 | exit(EXIT_FAILURE); | ||
| 272 | } | ||
| 273 | |||
| 274 | printf("Current input: %s\n", input.name); | ||
| 275 | </programlisting> | ||
| 276 | </example> | ||
| 277 | |||
| 278 | <example> | ||
| 279 | <title>Switching to the first video input</title> | ||
| 280 | |||
| 281 | <programlisting> | ||
| 282 | int index; | ||
| 283 | |||
| 284 | index = 0; | ||
| 285 | |||
| 286 | if (-1 == ioctl(fd, &VIDIOC-S-INPUT;, &index)) { | ||
| 287 | perror("VIDIOC_S_INPUT"); | ||
| 288 | exit(EXIT_FAILURE); | ||
| 289 | } | ||
| 290 | </programlisting> | ||
| 291 | </example> | ||
| 292 | </section> | ||
| 293 | |||
| 294 | <section id="audio"> | ||
| 295 | <title>Audio Inputs and Outputs</title> | ||
| 296 | |||
| 297 | <para>Audio inputs and outputs are physical connectors of a | ||
| 298 | device. Video capture devices have inputs, output devices have | ||
| 299 | outputs, zero or more each. Radio devices have no audio inputs or | ||
| 300 | outputs. They have exactly one tuner which in fact | ||
| 301 | <emphasis>is</emphasis> an audio source, but this API associates | ||
| 302 | tuners with video inputs or outputs only, and radio devices have | ||
| 303 | none of these.<footnote> | ||
| 304 | <para>Actually &v4l2-audio; ought to have a | ||
| 305 | <structfield>tuner</structfield> field like &v4l2-input;, not only | ||
| 306 | making the API more consistent but also permitting radio devices with | ||
| 307 | multiple tuners.</para> | ||
| 308 | </footnote> A connector on a TV card to loop back the received | ||
| 309 | audio signal to a sound card is not considered an audio output.</para> | ||
| 310 | |||
| 311 | <para>Audio and video inputs and outputs are associated. Selecting | ||
| 312 | a video source also selects an audio source. This is most evident when | ||
| 313 | the video and audio source is a tuner. Further audio connectors can | ||
| 314 | combine with more than one video input or output. Assumed two | ||
| 315 | composite video inputs and two audio inputs exist, there may be up to | ||
| 316 | four valid combinations. The relation of video and audio connectors | ||
| 317 | is defined in the <structfield>audioset</structfield> field of the | ||
| 318 | respective &v4l2-input; or &v4l2-output;, where each bit represents | ||
| 319 | the index number, starting at zero, of one audio input or output.</para> | ||
| 320 | |||
| 321 | <para>To learn about the number and attributes of the | ||
| 322 | available inputs and outputs applications can enumerate them with the | ||
| 323 | &VIDIOC-ENUMAUDIO; and &VIDIOC-ENUMAUDOUT; ioctl, respectively. The | ||
| 324 | &v4l2-audio; returned by the <constant>VIDIOC_ENUMAUDIO</constant> ioctl | ||
| 325 | also contains signal status information applicable when the current | ||
| 326 | audio input is queried.</para> | ||
| 327 | |||
| 328 | <para>The &VIDIOC-G-AUDIO; and &VIDIOC-G-AUDOUT; ioctls report | ||
| 329 | the current audio input and output, respectively. Note that, unlike | ||
| 330 | &VIDIOC-G-INPUT; and &VIDIOC-G-OUTPUT; these ioctls return a structure | ||
| 331 | as <constant>VIDIOC_ENUMAUDIO</constant> and | ||
| 332 | <constant>VIDIOC_ENUMAUDOUT</constant> do, not just an index.</para> | ||
| 333 | |||
| 334 | <para>To select an audio input and change its properties | ||
| 335 | applications call the &VIDIOC-S-AUDIO; ioctl. To select an audio | ||
| 336 | output (which presently has no changeable properties) applications | ||
| 337 | call the &VIDIOC-S-AUDOUT; ioctl.</para> | ||
| 338 | |||
| 339 | <para>Drivers must implement all audio input ioctls when the device | ||
| 340 | has multiple selectable audio inputs, all audio output ioctls when the | ||
| 341 | device has multiple selectable audio outputs. When the device has any | ||
| 342 | audio inputs or outputs the driver must set the <constant>V4L2_CAP_AUDIO</constant> | ||
| 343 | flag in the &v4l2-capability; returned by the &VIDIOC-QUERYCAP; ioctl.</para> | ||
| 344 | |||
| 345 | <example> | ||
| 346 | <title>Information about the current audio input</title> | ||
| 347 | |||
| 348 | <programlisting> | ||
| 349 | &v4l2-audio; audio; | ||
| 350 | |||
| 351 | memset(&audio, 0, sizeof(audio)); | ||
| 352 | |||
| 353 | if (-1 == ioctl(fd, &VIDIOC-G-AUDIO;, &audio)) { | ||
| 354 | perror("VIDIOC_G_AUDIO"); | ||
| 355 | exit(EXIT_FAILURE); | ||
| 356 | } | ||
| 357 | |||
| 358 | printf("Current input: %s\n", audio.name); | ||
| 359 | </programlisting> | ||
| 360 | </example> | ||
| 361 | |||
| 362 | <example> | ||
| 363 | <title>Switching to the first audio input</title> | ||
| 364 | |||
| 365 | <programlisting> | ||
| 366 | &v4l2-audio; audio; | ||
| 367 | |||
| 368 | memset(&audio, 0, sizeof(audio)); /* clear audio.mode, audio.reserved */ | ||
| 369 | |||
| 370 | audio.index = 0; | ||
| 371 | |||
| 372 | if (-1 == ioctl(fd, &VIDIOC-S-AUDIO;, &audio)) { | ||
| 373 | perror("VIDIOC_S_AUDIO"); | ||
| 374 | exit(EXIT_FAILURE); | ||
| 375 | } | ||
| 376 | </programlisting> | ||
| 377 | </example> | ||
| 378 | </section> | ||
| 379 | |||
| 380 | <section id="tuner"> | ||
| 381 | <title>Tuners and Modulators</title> | ||
| 382 | |||
| 383 | <section> | ||
| 384 | <title>Tuners</title> | ||
| 385 | |||
| 386 | <para>Video input devices can have one or more tuners | ||
| 387 | demodulating a RF signal. Each tuner is associated with one or more | ||
| 388 | video inputs, depending on the number of RF connectors on the tuner. | ||
| 389 | The <structfield>type</structfield> field of the respective | ||
| 390 | &v4l2-input; returned by the &VIDIOC-ENUMINPUT; ioctl is set to | ||
| 391 | <constant>V4L2_INPUT_TYPE_TUNER</constant> and its | ||
| 392 | <structfield>tuner</structfield> field contains the index number of | ||
| 393 | the tuner.</para> | ||
| 394 | |||
| 395 | <para>Radio input devices have exactly one tuner with index zero, no | ||
| 396 | video inputs.</para> | ||
| 397 | |||
| 398 | <para>To query and change tuner properties applications use the | ||
| 399 | &VIDIOC-G-TUNER; and &VIDIOC-S-TUNER; ioctls, respectively. The | ||
| 400 | &v4l2-tuner; returned by <constant>VIDIOC_G_TUNER</constant> also | ||
| 401 | contains signal status information applicable when the tuner of the | ||
| 402 | current video or radio input is queried. Note that | ||
| 403 | <constant>VIDIOC_S_TUNER</constant> does not switch the current tuner, | ||
| 404 | when there is more than one at all. The tuner is solely determined by | ||
| 405 | the current video input. Drivers must support both ioctls and set the | ||
| 406 | <constant>V4L2_CAP_TUNER</constant> flag in the &v4l2-capability; | ||
| 407 | returned by the &VIDIOC-QUERYCAP; ioctl when the device has one or | ||
| 408 | more tuners.</para> | ||
| 409 | </section> | ||
| 410 | |||
| 411 | <section> | ||
| 412 | <title>Modulators</title> | ||
| 413 | |||
| 414 | <para>Video output devices can have one or more modulators, uh, | ||
| 415 | modulating a video signal for radiation or connection to the antenna | ||
| 416 | input of a TV set or video recorder. Each modulator is associated with | ||
| 417 | one or more video outputs, depending on the number of RF connectors on | ||
| 418 | the modulator. The <structfield>type</structfield> field of the | ||
| 419 | respective &v4l2-output; returned by the &VIDIOC-ENUMOUTPUT; ioctl is | ||
| 420 | set to <constant>V4L2_OUTPUT_TYPE_MODULATOR</constant> and its | ||
| 421 | <structfield>modulator</structfield> field contains the index number | ||
| 422 | of the modulator.</para> | ||
| 423 | |||
| 424 | <para>Radio output devices have exactly one modulator with index | ||
| 425 | zero, no video outputs.</para> | ||
| 426 | |||
| 427 | <para>A video or radio device cannot support both a tuner and a | ||
| 428 | modulator. Two separate device nodes will have to be used for such | ||
| 429 | hardware, one that supports the tuner functionality and one that supports | ||
| 430 | the modulator functionality. The reason is a limitation with the | ||
| 431 | &VIDIOC-S-FREQUENCY; ioctl where you cannot specify whether the frequency | ||
| 432 | is for a tuner or a modulator.</para> | ||
| 433 | |||
| 434 | <para>To query and change modulator properties applications use | ||
| 435 | the &VIDIOC-G-MODULATOR; and &VIDIOC-S-MODULATOR; ioctl. Note that | ||
| 436 | <constant>VIDIOC_S_MODULATOR</constant> does not switch the current | ||
| 437 | modulator, when there is more than one at all. The modulator is solely | ||
| 438 | determined by the current video output. Drivers must support both | ||
| 439 | ioctls and set the <constant>V4L2_CAP_MODULATOR</constant> flag in | ||
| 440 | the &v4l2-capability; returned by the &VIDIOC-QUERYCAP; ioctl when the | ||
| 441 | device has one or more modulators.</para> | ||
| 442 | </section> | ||
| 443 | |||
| 444 | <section> | ||
| 445 | <title>Radio Frequency</title> | ||
| 446 | |||
| 447 | <para>To get and set the tuner or modulator radio frequency | ||
| 448 | applications use the &VIDIOC-G-FREQUENCY; and &VIDIOC-S-FREQUENCY; | ||
| 449 | ioctl which both take a pointer to a &v4l2-frequency;. These ioctls | ||
| 450 | are used for TV and radio devices alike. Drivers must support both | ||
| 451 | ioctls when the tuner or modulator ioctls are supported, or | ||
| 452 | when the device is a radio device.</para> | ||
| 453 | </section> | ||
| 454 | </section> | ||
| 455 | |||
| 456 | <section id="standard"> | ||
| 457 | <title>Video Standards</title> | ||
| 458 | |||
| 459 | <para>Video devices typically support one or more different video | ||
| 460 | standards or variations of standards. Each video input and output may | ||
| 461 | support another set of standards. This set is reported by the | ||
| 462 | <structfield>std</structfield> field of &v4l2-input; and | ||
| 463 | &v4l2-output; returned by the &VIDIOC-ENUMINPUT; and | ||
| 464 | &VIDIOC-ENUMOUTPUT; ioctls, respectively.</para> | ||
| 465 | |||
| 466 | <para>V4L2 defines one bit for each analog video standard | ||
| 467 | currently in use worldwide, and sets aside bits for driver defined | ||
| 468 | standards, ⪚ hybrid standards to watch NTSC video tapes on PAL TVs | ||
| 469 | and vice versa. Applications can use the predefined bits to select a | ||
| 470 | particular standard, although presenting the user a menu of supported | ||
| 471 | standards is preferred. To enumerate and query the attributes of the | ||
| 472 | supported standards applications use the &VIDIOC-ENUMSTD; ioctl.</para> | ||
| 473 | |||
| 474 | <para>Many of the defined standards are actually just variations | ||
| 475 | of a few major standards. The hardware may in fact not distinguish | ||
| 476 | between them, or do so internal and switch automatically. Therefore | ||
| 477 | enumerated standards also contain sets of one or more standard | ||
| 478 | bits.</para> | ||
| 479 | |||
| 480 | <para>Assume a hypothetic tuner capable of demodulating B/PAL, | ||
| 481 | G/PAL and I/PAL signals. The first enumerated standard is a set of B | ||
| 482 | and G/PAL, switched automatically depending on the selected radio | ||
| 483 | frequency in UHF or VHF band. Enumeration gives a "PAL-B/G" or "PAL-I" | ||
| 484 | choice. Similar a Composite input may collapse standards, enumerating | ||
| 485 | "PAL-B/G/H/I", "NTSC-M" and "SECAM-D/K".<footnote> | ||
| 486 | <para>Some users are already confused by technical terms PAL, | ||
| 487 | NTSC and SECAM. There is no point asking them to distinguish between | ||
| 488 | B, G, D, or K when the software or hardware can do that | ||
| 489 | automatically.</para> | ||
| 490 | </footnote></para> | ||
| 491 | |||
| 492 | <para>To query and select the standard used by the current video | ||
| 493 | input or output applications call the &VIDIOC-G-STD; and | ||
| 494 | &VIDIOC-S-STD; ioctl, respectively. The <emphasis>received</emphasis> | ||
| 495 | standard can be sensed with the &VIDIOC-QUERYSTD; ioctl. Note that the | ||
| 496 | parameter of all these ioctls is a pointer to a &v4l2-std-id; type | ||
| 497 | (a standard set), <emphasis>not</emphasis> an index into the standard | ||
| 498 | enumeration. Drivers must implement all video standard ioctls | ||
| 499 | when the device has one or more video inputs or outputs.</para> | ||
| 500 | |||
| 501 | <para>Special rules apply to devices such as USB cameras where the notion of video | ||
| 502 | standards makes little sense. More generally for any capture or output device | ||
| 503 | which is: <itemizedlist> | ||
| 504 | <listitem> | ||
| 505 | <para>incapable of capturing fields or frames at the nominal | ||
| 506 | rate of the video standard, or</para> | ||
| 507 | </listitem> | ||
| 508 | <listitem> | ||
| 509 | <para>that does not support the video standard formats at all.</para> | ||
| 510 | </listitem> | ||
| 511 | </itemizedlist> Here the driver shall set the | ||
| 512 | <structfield>std</structfield> field of &v4l2-input; and &v4l2-output; | ||
| 513 | to zero and the <constant>VIDIOC_G_STD</constant>, | ||
| 514 | <constant>VIDIOC_S_STD</constant>, | ||
| 515 | <constant>VIDIOC_QUERYSTD</constant> and | ||
| 516 | <constant>VIDIOC_ENUMSTD</constant> ioctls shall return the | ||
| 517 | &ENOTTY; or the &EINVAL;.</para> | ||
| 518 | <para>Applications can make use of the <xref linkend="input-capabilities" /> and | ||
| 519 | <xref linkend="output-capabilities"/> flags to determine whether the video standard ioctls | ||
| 520 | can be used with the given input or output.</para> | ||
| 521 | |||
| 522 | <example> | ||
| 523 | <title>Information about the current video standard</title> | ||
| 524 | |||
| 525 | <programlisting> | ||
| 526 | &v4l2-std-id; std_id; | ||
| 527 | &v4l2-standard; standard; | ||
| 528 | |||
| 529 | if (-1 == ioctl(fd, &VIDIOC-G-STD;, &std_id)) { | ||
| 530 | /* Note when VIDIOC_ENUMSTD always returns ENOTTY this | ||
| 531 | is no video device or it falls under the USB exception, | ||
| 532 | and VIDIOC_G_STD returning ENOTTY is no error. */ | ||
| 533 | |||
| 534 | perror("VIDIOC_G_STD"); | ||
| 535 | exit(EXIT_FAILURE); | ||
| 536 | } | ||
| 537 | |||
| 538 | memset(&standard, 0, sizeof(standard)); | ||
| 539 | standard.index = 0; | ||
| 540 | |||
| 541 | while (0 == ioctl(fd, &VIDIOC-ENUMSTD;, &standard)) { | ||
| 542 | if (standard.id & std_id) { | ||
| 543 | printf("Current video standard: %s\n", standard.name); | ||
| 544 | exit(EXIT_SUCCESS); | ||
| 545 | } | ||
| 546 | |||
| 547 | standard.index++; | ||
| 548 | } | ||
| 549 | |||
| 550 | /* EINVAL indicates the end of the enumeration, which cannot be | ||
| 551 | empty unless this device falls under the USB exception. */ | ||
| 552 | |||
| 553 | if (errno == EINVAL || standard.index == 0) { | ||
| 554 | perror("VIDIOC_ENUMSTD"); | ||
| 555 | exit(EXIT_FAILURE); | ||
| 556 | } | ||
| 557 | </programlisting> | ||
| 558 | </example> | ||
| 559 | |||
| 560 | <example> | ||
| 561 | <title>Listing the video standards supported by the current | ||
| 562 | input</title> | ||
| 563 | |||
| 564 | <programlisting> | ||
| 565 | &v4l2-input; input; | ||
| 566 | &v4l2-standard; standard; | ||
| 567 | |||
| 568 | memset(&input, 0, sizeof(input)); | ||
| 569 | |||
| 570 | if (-1 == ioctl(fd, &VIDIOC-G-INPUT;, &input.index)) { | ||
| 571 | perror("VIDIOC_G_INPUT"); | ||
| 572 | exit(EXIT_FAILURE); | ||
| 573 | } | ||
| 574 | |||
| 575 | if (-1 == ioctl(fd, &VIDIOC-ENUMINPUT;, &input)) { | ||
| 576 | perror("VIDIOC_ENUM_INPUT"); | ||
| 577 | exit(EXIT_FAILURE); | ||
| 578 | } | ||
| 579 | |||
| 580 | printf("Current input %s supports:\n", input.name); | ||
| 581 | |||
| 582 | memset(&standard, 0, sizeof(standard)); | ||
| 583 | standard.index = 0; | ||
| 584 | |||
| 585 | while (0 == ioctl(fd, &VIDIOC-ENUMSTD;, &standard)) { | ||
| 586 | if (standard.id & input.std) | ||
| 587 | printf("%s\n", standard.name); | ||
| 588 | |||
| 589 | standard.index++; | ||
| 590 | } | ||
| 591 | |||
| 592 | /* EINVAL indicates the end of the enumeration, which cannot be | ||
| 593 | empty unless this device falls under the USB exception. */ | ||
| 594 | |||
| 595 | if (errno != EINVAL || standard.index == 0) { | ||
| 596 | perror("VIDIOC_ENUMSTD"); | ||
| 597 | exit(EXIT_FAILURE); | ||
| 598 | } | ||
| 599 | </programlisting> | ||
| 600 | </example> | ||
| 601 | |||
| 602 | <example> | ||
| 603 | <title>Selecting a new video standard</title> | ||
| 604 | |||
| 605 | <programlisting> | ||
| 606 | &v4l2-input; input; | ||
| 607 | &v4l2-std-id; std_id; | ||
| 608 | |||
| 609 | memset(&input, 0, sizeof(input)); | ||
| 610 | |||
| 611 | if (-1 == ioctl(fd, &VIDIOC-G-INPUT;, &input.index)) { | ||
| 612 | perror("VIDIOC_G_INPUT"); | ||
| 613 | exit(EXIT_FAILURE); | ||
| 614 | } | ||
| 615 | |||
| 616 | if (-1 == ioctl(fd, &VIDIOC-ENUMINPUT;, &input)) { | ||
| 617 | perror("VIDIOC_ENUM_INPUT"); | ||
| 618 | exit(EXIT_FAILURE); | ||
| 619 | } | ||
| 620 | |||
| 621 | if (0 == (input.std & V4L2_STD_PAL_BG)) { | ||
| 622 | fprintf(stderr, "Oops. B/G PAL is not supported.\n"); | ||
| 623 | exit(EXIT_FAILURE); | ||
| 624 | } | ||
| 625 | |||
| 626 | /* Note this is also supposed to work when only B | ||
| 627 | <emphasis>or</emphasis> G/PAL is supported. */ | ||
| 628 | |||
| 629 | std_id = V4L2_STD_PAL_BG; | ||
| 630 | |||
| 631 | if (-1 == ioctl(fd, &VIDIOC-S-STD;, &std_id)) { | ||
| 632 | perror("VIDIOC_S_STD"); | ||
| 633 | exit(EXIT_FAILURE); | ||
| 634 | } | ||
| 635 | </programlisting> | ||
| 636 | </example> | ||
| 637 | </section> | ||
| 638 | <section id="dv-timings"> | ||
| 639 | <title>Digital Video (DV) Timings</title> | ||
| 640 | <para> | ||
| 641 | The video standards discussed so far have been dealing with Analog TV and the | ||
| 642 | corresponding video timings. Today there are many more different hardware interfaces | ||
| 643 | such as High Definition TV interfaces (HDMI), VGA, DVI connectors etc., that carry | ||
| 644 | video signals and there is a need to extend the API to select the video timings | ||
| 645 | for these interfaces. Since it is not possible to extend the &v4l2-std-id; due to | ||
| 646 | the limited bits available, a new set of ioctls was added to set/get video timings at | ||
| 647 | the input and output.</para> | ||
| 648 | |||
| 649 | <para>These ioctls deal with the detailed digital video timings that define | ||
| 650 | each video format. This includes parameters such as the active video width and height, | ||
| 651 | signal polarities, frontporches, backporches, sync widths etc. The <filename>linux/v4l2-dv-timings.h</filename> | ||
| 652 | header can be used to get the timings of the formats in the <xref linkend="cea861" /> and | ||
| 653 | <xref linkend="vesadmt" /> standards. | ||
| 654 | </para> | ||
| 655 | |||
| 656 | <para>To enumerate and query the attributes of the DV timings supported by a device | ||
| 657 | applications use the &VIDIOC-ENUM-DV-TIMINGS; and &VIDIOC-DV-TIMINGS-CAP; ioctls. | ||
| 658 | To set DV timings for the device applications use the | ||
| 659 | &VIDIOC-S-DV-TIMINGS; ioctl and to get current DV timings they use the | ||
| 660 | &VIDIOC-G-DV-TIMINGS; ioctl. To detect the DV timings as seen by the video receiver applications | ||
| 661 | use the &VIDIOC-QUERY-DV-TIMINGS; ioctl.</para> | ||
| 662 | <para>Applications can make use of the <xref linkend="input-capabilities" /> and | ||
| 663 | <xref linkend="output-capabilities"/> flags to determine whether the digital video ioctls | ||
| 664 | can be used with the given input or output.</para> | ||
| 665 | </section> | ||
| 666 | |||
| 667 | &sub-controls; | ||
| 668 | |||
| 669 | <section id="format"> | ||
| 670 | <title>Data Formats</title> | ||
| 671 | |||
| 672 | <section> | ||
| 673 | <title>Data Format Negotiation</title> | ||
| 674 | |||
| 675 | <para>Different devices exchange different kinds of data with | ||
| 676 | applications, for example video images, raw or sliced VBI data, RDS | ||
| 677 | datagrams. Even within one kind many different formats are possible, | ||
| 678 | in particular an abundance of image formats. Although drivers must | ||
| 679 | provide a default and the selection persists across closing and | ||
| 680 | reopening a device, applications should always negotiate a data format | ||
| 681 | before engaging in data exchange. Negotiation means the application | ||
| 682 | asks for a particular format and the driver selects and reports the | ||
| 683 | best the hardware can do to satisfy the request. Of course | ||
| 684 | applications can also just query the current selection.</para> | ||
| 685 | |||
| 686 | <para>A single mechanism exists to negotiate all data formats | ||
| 687 | using the aggregate &v4l2-format; and the &VIDIOC-G-FMT; and | ||
| 688 | &VIDIOC-S-FMT; ioctls. Additionally the &VIDIOC-TRY-FMT; ioctl can be | ||
| 689 | used to examine what the hardware <emphasis>could</emphasis> do, | ||
| 690 | without actually selecting a new data format. The data formats | ||
| 691 | supported by the V4L2 API are covered in the respective device section | ||
| 692 | in <xref linkend="devices" />. For a closer look at image formats see | ||
| 693 | <xref linkend="pixfmt" />.</para> | ||
| 694 | |||
| 695 | <para>The <constant>VIDIOC_S_FMT</constant> ioctl is a major | ||
| 696 | turning-point in the initialization sequence. Prior to this point | ||
| 697 | multiple panel applications can access the same device concurrently to | ||
| 698 | select the current input, change controls or modify other properties. | ||
| 699 | The first <constant>VIDIOC_S_FMT</constant> assigns a logical stream | ||
| 700 | (video data, VBI data etc.) exclusively to one file descriptor.</para> | ||
| 701 | |||
| 702 | <para>Exclusive means no other application, more precisely no | ||
| 703 | other file descriptor, can grab this stream or change device | ||
| 704 | properties inconsistent with the negotiated parameters. A video | ||
| 705 | standard change for example, when the new standard uses a different | ||
| 706 | number of scan lines, can invalidate the selected image format. | ||
| 707 | Therefore only the file descriptor owning the stream can make | ||
| 708 | invalidating changes. Accordingly multiple file descriptors which | ||
| 709 | grabbed different logical streams prevent each other from interfering | ||
| 710 | with their settings. When for example video overlay is about to start | ||
| 711 | or already in progress, simultaneous video capturing may be restricted | ||
| 712 | to the same cropping and image size.</para> | ||
| 713 | |||
| 714 | <para>When applications omit the | ||
| 715 | <constant>VIDIOC_S_FMT</constant> ioctl its locking side effects are | ||
| 716 | implied by the next step, the selection of an I/O method with the | ||
| 717 | &VIDIOC-REQBUFS; ioctl or implicit with the first &func-read; or | ||
| 718 | &func-write; call.</para> | ||
| 719 | |||
| 720 | <para>Generally only one logical stream can be assigned to a | ||
| 721 | file descriptor, the exception being drivers permitting simultaneous | ||
| 722 | video capturing and overlay using the same file descriptor for | ||
| 723 | compatibility with V4L and earlier versions of V4L2. Switching the | ||
| 724 | logical stream or returning into "panel mode" is possible by closing | ||
| 725 | and reopening the device. Drivers <emphasis>may</emphasis> support a | ||
| 726 | switch using <constant>VIDIOC_S_FMT</constant>.</para> | ||
| 727 | |||
| 728 | <para>All drivers exchanging data with | ||
| 729 | applications must support the <constant>VIDIOC_G_FMT</constant> and | ||
| 730 | <constant>VIDIOC_S_FMT</constant> ioctl. Implementation of the | ||
| 731 | <constant>VIDIOC_TRY_FMT</constant> is highly recommended but | ||
| 732 | optional.</para> | ||
| 733 | </section> | ||
| 734 | |||
| 735 | <section> | ||
| 736 | <title>Image Format Enumeration</title> | ||
| 737 | |||
| 738 | <para>Apart of the generic format negotiation functions | ||
| 739 | a special ioctl to enumerate all image formats supported by video | ||
| 740 | capture, overlay or output devices is available.<footnote> | ||
| 741 | <para>Enumerating formats an application has no a-priori | ||
| 742 | knowledge of (otherwise it could explicitly ask for them and need not | ||
| 743 | enumerate) seems useless, but there are applications serving as proxy | ||
| 744 | between drivers and the actual video applications for which this is | ||
| 745 | useful.</para> | ||
| 746 | </footnote></para> | ||
| 747 | |||
| 748 | <para>The &VIDIOC-ENUM-FMT; ioctl must be supported | ||
| 749 | by all drivers exchanging image data with applications.</para> | ||
| 750 | |||
| 751 | <important> | ||
| 752 | <para>Drivers are not supposed to convert image formats in | ||
| 753 | kernel space. They must enumerate only formats directly supported by | ||
| 754 | the hardware. If necessary driver writers should publish an example | ||
| 755 | conversion routine or library for integration into applications.</para> | ||
| 756 | </important> | ||
| 757 | </section> | ||
| 758 | </section> | ||
| 759 | |||
| 760 | &sub-planar-apis; | ||
| 761 | |||
| 762 | <section id="crop"> | ||
| 763 | <title>Image Cropping, Insertion and Scaling</title> | ||
| 764 | |||
| 765 | <para>Some video capture devices can sample a subsection of the | ||
| 766 | picture and shrink or enlarge it to an image of arbitrary size. We | ||
| 767 | call these abilities cropping and scaling. Some video output devices | ||
| 768 | can scale an image up or down and insert it at an arbitrary scan line | ||
| 769 | and horizontal offset into a video signal.</para> | ||
| 770 | |||
| 771 | <para>Applications can use the following API to select an area in | ||
| 772 | the video signal, query the default area and the hardware limits. | ||
| 773 | <emphasis>Despite their name, the &VIDIOC-CROPCAP;, &VIDIOC-G-CROP; | ||
| 774 | and &VIDIOC-S-CROP; ioctls apply to input as well as output | ||
| 775 | devices.</emphasis></para> | ||
| 776 | |||
| 777 | <para>Scaling requires a source and a target. On a video capture | ||
| 778 | or overlay device the source is the video signal, and the cropping | ||
| 779 | ioctls determine the area actually sampled. The target are images | ||
| 780 | read by the application or overlaid onto the graphics screen. Their | ||
| 781 | size (and position for an overlay) is negotiated with the | ||
| 782 | &VIDIOC-G-FMT; and &VIDIOC-S-FMT; ioctls.</para> | ||
| 783 | |||
| 784 | <para>On a video output device the source are the images passed in | ||
| 785 | by the application, and their size is again negotiated with the | ||
| 786 | <constant>VIDIOC_G/S_FMT</constant> ioctls, or may be encoded in a | ||
| 787 | compressed video stream. The target is the video signal, and the | ||
| 788 | cropping ioctls determine the area where the images are | ||
| 789 | inserted.</para> | ||
| 790 | |||
| 791 | <para>Source and target rectangles are defined even if the device | ||
| 792 | does not support scaling or the <constant>VIDIOC_G/S_CROP</constant> | ||
| 793 | ioctls. Their size (and position where applicable) will be fixed in | ||
| 794 | this case. <emphasis>All capture and output device must support the | ||
| 795 | <constant>VIDIOC_CROPCAP</constant> ioctl such that applications can | ||
| 796 | determine if scaling takes place.</emphasis></para> | ||
| 797 | |||
| 798 | <section> | ||
| 799 | <title>Cropping Structures</title> | ||
| 800 | |||
| 801 | <figure id="crop-scale"> | ||
| 802 | <title>Image Cropping, Insertion and Scaling</title> | ||
| 803 | <mediaobject> | ||
| 804 | <imageobject> | ||
| 805 | <imagedata fileref="crop.pdf" format="PS" /> | ||
| 806 | </imageobject> | ||
| 807 | <imageobject> | ||
| 808 | <imagedata fileref="crop.gif" format="GIF" /> | ||
| 809 | </imageobject> | ||
| 810 | <textobject> | ||
| 811 | <phrase>The cropping, insertion and scaling process</phrase> | ||
| 812 | </textobject> | ||
| 813 | </mediaobject> | ||
| 814 | </figure> | ||
| 815 | |||
| 816 | <para>For capture devices the coordinates of the top left | ||
| 817 | corner, width and height of the area which can be sampled is given by | ||
| 818 | the <structfield>bounds</structfield> substructure of the | ||
| 819 | &v4l2-cropcap; returned by the <constant>VIDIOC_CROPCAP</constant> | ||
| 820 | ioctl. To support a wide range of hardware this specification does not | ||
| 821 | define an origin or units. However by convention drivers should | ||
| 822 | horizontally count unscaled samples relative to 0H (the leading edge | ||
| 823 | of the horizontal sync pulse, see <xref linkend="vbi-hsync" />). | ||
| 824 | Vertically ITU-R line | ||
| 825 | numbers of the first field (<xref linkend="vbi-525" />, <xref | ||
| 826 | linkend="vbi-625" />), multiplied by two if the driver can capture both | ||
| 827 | fields.</para> | ||
| 828 | |||
| 829 | <para>The top left corner, width and height of the source | ||
| 830 | rectangle, that is the area actually sampled, is given by &v4l2-crop; | ||
| 831 | using the same coordinate system as &v4l2-cropcap;. Applications can | ||
| 832 | use the <constant>VIDIOC_G_CROP</constant> and | ||
| 833 | <constant>VIDIOC_S_CROP</constant> ioctls to get and set this | ||
| 834 | rectangle. It must lie completely within the capture boundaries and | ||
| 835 | the driver may further adjust the requested size and/or position | ||
| 836 | according to hardware limitations.</para> | ||
| 837 | |||
| 838 | <para>Each capture device has a default source rectangle, given | ||
| 839 | by the <structfield>defrect</structfield> substructure of | ||
| 840 | &v4l2-cropcap;. The center of this rectangle shall align with the | ||
| 841 | center of the active picture area of the video signal, and cover what | ||
| 842 | the driver writer considers the complete picture. Drivers shall reset | ||
| 843 | the source rectangle to the default when the driver is first loaded, | ||
| 844 | but not later.</para> | ||
| 845 | |||
| 846 | <para>For output devices these structures and ioctls are used | ||
| 847 | accordingly, defining the <emphasis>target</emphasis> rectangle where | ||
| 848 | the images will be inserted into the video signal.</para> | ||
| 849 | |||
| 850 | </section> | ||
| 851 | |||
| 852 | <section> | ||
| 853 | <title>Scaling Adjustments</title> | ||
| 854 | |||
| 855 | <para>Video hardware can have various cropping, insertion and | ||
| 856 | scaling limitations. It may only scale up or down, support only | ||
| 857 | discrete scaling factors, or have different scaling abilities in | ||
| 858 | horizontal and vertical direction. Also it may not support scaling at | ||
| 859 | all. At the same time the &v4l2-crop; rectangle may have to be | ||
| 860 | aligned, and both the source and target rectangles may have arbitrary | ||
| 861 | upper and lower size limits. In particular the maximum | ||
| 862 | <structfield>width</structfield> and <structfield>height</structfield> | ||
| 863 | in &v4l2-crop; may be smaller than the | ||
| 864 | &v4l2-cropcap;.<structfield>bounds</structfield> area. Therefore, as | ||
| 865 | usual, drivers are expected to adjust the requested parameters and | ||
| 866 | return the actual values selected.</para> | ||
| 867 | |||
| 868 | <para>Applications can change the source or the target rectangle | ||
| 869 | first, as they may prefer a particular image size or a certain area in | ||
| 870 | the video signal. If the driver has to adjust both to satisfy hardware | ||
| 871 | limitations, the last requested rectangle shall take priority, and the | ||
| 872 | driver should preferably adjust the opposite one. The &VIDIOC-TRY-FMT; | ||
| 873 | ioctl however shall not change the driver state and therefore only | ||
| 874 | adjust the requested rectangle.</para> | ||
| 875 | |||
| 876 | <para>Suppose scaling on a video capture device is restricted to | ||
| 877 | a factor 1:1 or 2:1 in either direction and the target image size must | ||
| 878 | be a multiple of 16 × 16 pixels. The source cropping | ||
| 879 | rectangle is set to defaults, which are also the upper limit in this | ||
| 880 | example, of 640 × 400 pixels at offset 0, 0. An | ||
| 881 | application requests an image size of 300 × 225 | ||
| 882 | pixels, assuming video will be scaled down from the "full picture" | ||
| 883 | accordingly. The driver sets the image size to the closest possible | ||
| 884 | values 304 × 224, then chooses the cropping rectangle | ||
| 885 | closest to the requested size, that is 608 × 224 | ||
| 886 | (224 × 2:1 would exceed the limit 400). The offset | ||
| 887 | 0, 0 is still valid, thus unmodified. Given the default cropping | ||
| 888 | rectangle reported by <constant>VIDIOC_CROPCAP</constant> the | ||
| 889 | application can easily propose another offset to center the cropping | ||
| 890 | rectangle.</para> | ||
| 891 | |||
| 892 | <para>Now the application may insist on covering an area using a | ||
| 893 | picture aspect ratio closer to the original request, so it asks for a | ||
| 894 | cropping rectangle of 608 × 456 pixels. The present | ||
| 895 | scaling factors limit cropping to 640 × 384, so the | ||
| 896 | driver returns the cropping size 608 × 384 and adjusts | ||
| 897 | the image size to closest possible 304 × 192.</para> | ||
| 898 | |||
| 899 | </section> | ||
| 900 | |||
| 901 | <section> | ||
| 902 | <title>Examples</title> | ||
| 903 | |||
| 904 | <para>Source and target rectangles shall remain unchanged across | ||
| 905 | closing and reopening a device, such that piping data into or out of a | ||
| 906 | device will work without special preparations. More advanced | ||
| 907 | applications should ensure the parameters are suitable before starting | ||
| 908 | I/O.</para> | ||
| 909 | |||
| 910 | <example> | ||
| 911 | <title>Resetting the cropping parameters</title> | ||
| 912 | |||
| 913 | <para>(A video capture device is assumed; change | ||
| 914 | <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant> for other | ||
| 915 | devices.)</para> | ||
| 916 | |||
| 917 | <programlisting> | ||
| 918 | &v4l2-cropcap; cropcap; | ||
| 919 | &v4l2-crop; crop; | ||
| 920 | |||
| 921 | memset (&cropcap, 0, sizeof (cropcap)); | ||
| 922 | cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 923 | |||
| 924 | if (-1 == ioctl (fd, &VIDIOC-CROPCAP;, &cropcap)) { | ||
| 925 | perror ("VIDIOC_CROPCAP"); | ||
| 926 | exit (EXIT_FAILURE); | ||
| 927 | } | ||
| 928 | |||
| 929 | memset (&crop, 0, sizeof (crop)); | ||
| 930 | crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 931 | crop.c = cropcap.defrect; | ||
| 932 | |||
| 933 | /* Ignore if cropping is not supported (EINVAL). */ | ||
| 934 | |||
| 935 | if (-1 == ioctl (fd, &VIDIOC-S-CROP;, &crop) | ||
| 936 | && errno != EINVAL) { | ||
| 937 | perror ("VIDIOC_S_CROP"); | ||
| 938 | exit (EXIT_FAILURE); | ||
| 939 | } | ||
| 940 | </programlisting> | ||
| 941 | </example> | ||
| 942 | |||
| 943 | <example> | ||
| 944 | <title>Simple downscaling</title> | ||
| 945 | |||
| 946 | <para>(A video capture device is assumed.)</para> | ||
| 947 | |||
| 948 | <programlisting> | ||
| 949 | &v4l2-cropcap; cropcap; | ||
| 950 | &v4l2-format; format; | ||
| 951 | |||
| 952 | reset_cropping_parameters (); | ||
| 953 | |||
| 954 | /* Scale down to 1/4 size of full picture. */ | ||
| 955 | |||
| 956 | memset (&format, 0, sizeof (format)); /* defaults */ | ||
| 957 | |||
| 958 | format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 959 | |||
| 960 | format.fmt.pix.width = cropcap.defrect.width >> 1; | ||
| 961 | format.fmt.pix.height = cropcap.defrect.height >> 1; | ||
| 962 | format.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; | ||
| 963 | |||
| 964 | if (-1 == ioctl (fd, &VIDIOC-S-FMT;, &format)) { | ||
| 965 | perror ("VIDIOC_S_FORMAT"); | ||
| 966 | exit (EXIT_FAILURE); | ||
| 967 | } | ||
| 968 | |||
| 969 | /* We could check the actual image size now, the actual scaling factor | ||
| 970 | or if the driver can scale at all. */ | ||
| 971 | </programlisting> | ||
| 972 | </example> | ||
| 973 | |||
| 974 | <example> | ||
| 975 | <title>Selecting an output area</title> | ||
| 976 | |||
| 977 | <programlisting> | ||
| 978 | &v4l2-cropcap; cropcap; | ||
| 979 | &v4l2-crop; crop; | ||
| 980 | |||
| 981 | memset (&cropcap, 0, sizeof (cropcap)); | ||
| 982 | cropcap.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | ||
| 983 | |||
| 984 | if (-1 == ioctl (fd, VIDIOC_CROPCAP;, &cropcap)) { | ||
| 985 | perror ("VIDIOC_CROPCAP"); | ||
| 986 | exit (EXIT_FAILURE); | ||
| 987 | } | ||
| 988 | |||
| 989 | memset (&crop, 0, sizeof (crop)); | ||
| 990 | |||
| 991 | crop.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | ||
| 992 | crop.c = cropcap.defrect; | ||
| 993 | |||
| 994 | /* Scale the width and height to 50 % of their original size | ||
| 995 | and center the output. */ | ||
| 996 | |||
| 997 | crop.c.width /= 2; | ||
| 998 | crop.c.height /= 2; | ||
| 999 | crop.c.left += crop.c.width / 2; | ||
| 1000 | crop.c.top += crop.c.height / 2; | ||
| 1001 | |||
| 1002 | /* Ignore if cropping is not supported (EINVAL). */ | ||
| 1003 | |||
| 1004 | if (-1 == ioctl (fd, VIDIOC_S_CROP, &crop) | ||
| 1005 | && errno != EINVAL) { | ||
| 1006 | perror ("VIDIOC_S_CROP"); | ||
| 1007 | exit (EXIT_FAILURE); | ||
| 1008 | } | ||
| 1009 | </programlisting> | ||
| 1010 | </example> | ||
| 1011 | |||
| 1012 | <example> | ||
| 1013 | <title>Current scaling factor and pixel aspect</title> | ||
| 1014 | |||
| 1015 | <para>(A video capture device is assumed.)</para> | ||
| 1016 | |||
| 1017 | <programlisting> | ||
| 1018 | &v4l2-cropcap; cropcap; | ||
| 1019 | &v4l2-crop; crop; | ||
| 1020 | &v4l2-format; format; | ||
| 1021 | double hscale, vscale; | ||
| 1022 | double aspect; | ||
| 1023 | int dwidth, dheight; | ||
| 1024 | |||
| 1025 | memset (&cropcap, 0, sizeof (cropcap)); | ||
| 1026 | cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 1027 | |||
| 1028 | if (-1 == ioctl (fd, &VIDIOC-CROPCAP;, &cropcap)) { | ||
| 1029 | perror ("VIDIOC_CROPCAP"); | ||
| 1030 | exit (EXIT_FAILURE); | ||
| 1031 | } | ||
| 1032 | |||
| 1033 | memset (&crop, 0, sizeof (crop)); | ||
| 1034 | crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 1035 | |||
| 1036 | if (-1 == ioctl (fd, &VIDIOC-G-CROP;, &crop)) { | ||
| 1037 | if (errno != EINVAL) { | ||
| 1038 | perror ("VIDIOC_G_CROP"); | ||
| 1039 | exit (EXIT_FAILURE); | ||
| 1040 | } | ||
| 1041 | |||
| 1042 | /* Cropping not supported. */ | ||
| 1043 | crop.c = cropcap.defrect; | ||
| 1044 | } | ||
| 1045 | |||
| 1046 | memset (&format, 0, sizeof (format)); | ||
| 1047 | format.fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
| 1048 | |||
| 1049 | if (-1 == ioctl (fd, &VIDIOC-G-FMT;, &format)) { | ||
| 1050 | perror ("VIDIOC_G_FMT"); | ||
| 1051 | exit (EXIT_FAILURE); | ||
| 1052 | } | ||
| 1053 | |||
| 1054 | /* The scaling applied by the driver. */ | ||
| 1055 | |||
| 1056 | hscale = format.fmt.pix.width / (double) crop.c.width; | ||
| 1057 | vscale = format.fmt.pix.height / (double) crop.c.height; | ||
| 1058 | |||
| 1059 | aspect = cropcap.pixelaspect.numerator / | ||
| 1060 | (double) cropcap.pixelaspect.denominator; | ||
| 1061 | aspect = aspect * hscale / vscale; | ||
| 1062 | |||
| 1063 | /* Devices following ITU-R BT.601 do not capture | ||
| 1064 | square pixels. For playback on a computer monitor | ||
| 1065 | we should scale the images to this size. */ | ||
| 1066 | |||
| 1067 | dwidth = format.fmt.pix.width / aspect; | ||
| 1068 | dheight = format.fmt.pix.height; | ||
| 1069 | </programlisting> | ||
| 1070 | </example> | ||
| 1071 | </section> | ||
| 1072 | </section> | ||
| 1073 | |||
| 1074 | &sub-selection-api; | ||
| 1075 | |||
| 1076 | <section id="streaming-par"> | ||
| 1077 | <title>Streaming Parameters</title> | ||
| 1078 | |||
| 1079 | <para>Streaming parameters are intended to optimize the video | ||
| 1080 | capture process as well as I/O. Presently applications can request a | ||
| 1081 | high quality capture mode with the &VIDIOC-S-PARM; ioctl.</para> | ||
| 1082 | |||
| 1083 | <para>The current video standard determines a nominal number of | ||
| 1084 | frames per second. If less than this number of frames is to be | ||
| 1085 | captured or output, applications can request frame skipping or | ||
| 1086 | duplicating on the driver side. This is especially useful when using | ||
| 1087 | the &func-read; or &func-write;, which are not augmented by timestamps | ||
| 1088 | or sequence counters, and to avoid unnecessary data copying.</para> | ||
| 1089 | |||
| 1090 | <para>Finally these ioctls can be used to determine the number of | ||
| 1091 | buffers used internally by a driver in read/write mode. For | ||
| 1092 | implications see the section discussing the &func-read; | ||
| 1093 | function.</para> | ||
| 1094 | |||
| 1095 | <para>To get and set the streaming parameters applications call | ||
| 1096 | the &VIDIOC-G-PARM; and &VIDIOC-S-PARM; ioctl, respectively. They take | ||
| 1097 | a pointer to a &v4l2-streamparm;, which contains a union holding | ||
| 1098 | separate parameters for input and output devices.</para> | ||
| 1099 | |||
| 1100 | <para>These ioctls are optional, drivers need not implement | ||
| 1101 | them. If so, they return the &EINVAL;.</para> | ||
| 1102 | </section> | ||
| @@ -1,2723 +0,0 @@ | |||
| 1 | <title>Changes</title> | ||
| 2 | |||
| 3 | <para>The following chapters document the evolution of the V4L2 API, | ||
| 4 | errata or extensions. They are also intended to help application and | ||
| 5 | driver writers to port or update their code.</para> | ||
| 6 | |||
| 7 | <section id="diff-v4l"> | ||
| 8 | <title>Differences between V4L and V4L2</title> | ||
| 9 | |||
| 10 | <para>The Video For Linux API was first introduced in Linux 2.1 to | ||
| 11 | unify and replace various TV and radio device related interfaces, | ||
| 12 | developed independently by driver writers in prior years. Starting | ||
| 13 | with Linux 2.5 the much improved V4L2 API replaces the V4L API. | ||
| 14 | The support for the old V4L calls were removed from Kernel, but the | ||
| 15 | library <xref linkend="libv4l" /> supports the conversion of a V4L | ||
| 16 | API system call into a V4L2 one.</para> | ||
| 17 | |||
| 18 | <section> | ||
| 19 | <title>Opening and Closing Devices</title> | ||
| 20 | |||
| 21 | <para>For compatibility reasons the character device file names | ||
| 22 | recommended for V4L2 video capture, overlay, radio and raw | ||
| 23 | vbi capture devices did not change from those used by V4L. They are | ||
| 24 | listed in <xref linkend="devices" /> and below in <xref | ||
| 25 | linkend="v4l-dev" />.</para> | ||
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