/* * dmxdev.h * * Copyright (C) 2000 Ralph Metzler & Marcus Metzler *                    for convergence integrated media GmbH * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 2.1 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * */ #ifndef _DMXDEV_H_#define _DMXDEV_H_ #include <linux/types.h>#include <linux/spinlock.h>#include <linux/kernel.h>#include <linux/time.h>#include <linux/timer.h>#include <linux/wait.h>#include <linux/fs.h>#include <linux/string.h>#include <linux/mutex.h>#include <linux/slab.h> #include <linux/dvb/dmx.h> #include <media/dvbdev.h>#include <media/demux.h>#include <media/dvb_ringbuffer.h>#include <media/dvb_vb2.h> /** * enum dmxdev_type - type of demux filter type. * * @DMXDEV_TYPE_NONE:	no filter set. * @DMXDEV_TYPE_SEC:	section filter. * @DMXDEV_TYPE_PES:	Program Elementary Stream (PES) filter. */enum dmxdev_type {	DMXDEV_TYPE_NONE,	DMXDEV_TYPE_SEC,	DMXDEV_TYPE_PES,}; /** * enum dmxdev_state - state machine for the dmxdev. * * @DMXDEV_STATE_FREE:		indicates that the filter is freed. * @DMXDEV_STATE_ALLOCATED:	indicates that the filter was allocated *				to be used. * @DMXDEV_STATE_SET:		indicates that the filter parameters are set. * @DMXDEV_STATE_GO:		indicates that the filter is running. * @DMXDEV_STATE_DONE:		indicates that a packet was already filtered *				and the filter is now disabled. *				Set only if %DMX_ONESHOT. See *				&dmx_sct_filter_params. * @DMXDEV_STATE_TIMEDOUT:	Indicates a timeout condition. */enum dmxdev_state {	DMXDEV_STATE_FREE,	DMXDEV_STATE_ALLOCATED,	DMXDEV_STATE_SET,	DMXDEV_STATE_GO,	DMXDEV_STATE_DONE,	DMXDEV_STATE_TIMEDOUT}; /** * struct dmxdev_feed - digital TV dmxdev feed * * @pid:	Program ID to be filtered * @ts:		pointer to &struct dmx_ts_feed * @next:	&struct list_head pointing to the next feed. */ struct dmxdev_feed {	u16 pid;	struct dmx_ts_feed *ts;	struct list_head next;}; /** * struct dmxdev_filter - digital TV dmxdev filter * * @filter:	a union describing a dmxdev filter. *		Currently used only for section filters. * @filter.sec: a &struct dmx_section_filter pointer. *		For section filter only. * @feed:	a union describing a dmxdev feed. *		Depending on the filter type, it can be either *		@feed.ts or @feed.sec. * @feed.ts:	a &struct list_head list. *		For TS and PES feeds. * @feed.sec:	a &struct dmx_section_feed pointer. *		For section feed only. * @params:	a union describing dmxdev filter parameters. *		Depending on the filter type, it can be either *		@params.sec or @params.pes. * @params.sec:	a &struct dmx_sct_filter_params embedded struct. *		For section filter only. * @params.pes:	a &struct dmx_pes_filter_params embedded struct. *		For PES filter only. * @type:	type of the dmxdev filter, as defined by &enum dmxdev_type. * @state:	state of the dmxdev filter, as defined by &enum dmxdev_state. * @dev:	pointer to &struct dmxdev. * @buffer:	an embedded &struct dvb_ringbuffer buffer. * @vb2_ctx:	control struct for VB2 handler * @mutex:	protects the access to &struct dmxdev_filter. * @timer:	&struct timer_list embedded timer, used to check for *		feed timeouts. *		Only for section filter. * @todo:	index for the @secheader. *		Only for section filter. * @secheader:	buffer cache to parse the section header. *		Only for section filter. */struct dmxdev_filter {	union {		struct dmx_section_filter *sec;	} filter; 	union {		/* list of TS and PES feeds (struct dmxdev_feed) */		struct list_head ts;		struct dmx_section_feed *sec;	} feed; 	union {		struct dmx_sct_filter_params sec;		struct dmx_pes_filter_params pes;	} params; 	enum dmxdev_type type;	enum dmxdev_state state;	struct dmxdev *dev;	struct dvb_ringbuffer buffer;	struct dvb_vb2_ctx vb2_ctx; 	struct mutex mutex; 	/* only for sections */	struct timer_list timer;	int todo;	u8 secheader[3];}; /** * struct dmxdev - Describes a digital TV demux device. * * @dvbdev:		pointer to &struct dvb_device associated with *			the demux device node. * @dvr_dvbdev:		pointer to &struct dvb_device associated with *			the dvr device node. * @filter:		pointer to &struct dmxdev_filter. * @demux:		pointer to &struct dmx_demux. * @filternum:		number of filters. * @capabilities:	demux capabilities as defined by &enum dmx_demux_caps. * @may_do_mmap:	flag used to indicate if the device may do mmap. * @exit:		flag to indicate that the demux is being released. * @dvr_orig_fe:	pointer to &struct dmx_frontend. * @dvr_buffer:		embedded &struct dvb_ringbuffer for DVB output. * @dvr_vb2_ctx:	control struct for VB2 handler * @mutex:		protects the usage of this structure. * @lock:		protects access to &dmxdev->filter->data. */struct dmxdev {	struct dvb_device *dvbdev;	struct dvb_device *dvr_dvbdev; 	struct dmxdev_filter *filter;	struct dmx_demux *demux; 	int filternum;	int capabilities; 	unsigned int may_do_mmap:1;	unsigned int exit:1;#define DMXDEV_CAP_DUPLEX 1	struct dmx_frontend *dvr_orig_fe; 	struct dvb_ringbuffer dvr_buffer;#define DVR_BUFFER_SIZE (10*188*1024) 	struct dvb_vb2_ctx dvr_vb2_ctx; 	struct mutex mutex;	spinlock_t lock;}; /** * dvb_dmxdev_init - initializes a digital TV demux and registers both demux *	and DVR devices. * * @dmxdev: pointer to &struct dmxdev. * @adap: pointer to &struct dvb_adapter. */int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *adap); /** * dvb_dmxdev_release - releases a digital TV demux and unregisters it. * * @dmxdev: pointer to &struct dmxdev. */void dvb_dmxdev_release(struct dmxdev *dmxdev); #endif /* _DMXDEV_H_ */