/* * Copyright (c) 1999-2000 Image Power, Inc. and the University of * British Columbia. * Copyright (c) 2001-2003 Michael David Adams. * All rights reserved. */ /* __START_OF_JASPER_LICENSE__ * * JasPer License Version 2.0 * * Copyright (c) 2001-2006 Michael David Adams * Copyright (c) 1999-2000 Image Power, Inc. * Copyright (c) 1999-2000 The University of British Columbia * * All rights reserved. * * Permission is hereby granted, free of charge, to any person (the * "User") obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, * publish, distribute, and/or sell copies of the Software, and to permit * persons to whom the Software is furnished to do so, subject to the * following conditions: * * 1. The above copyright notices and this permission notice (which * includes the disclaimer below) shall be included in all copies or * substantial portions of the Software. * * 2. The name of a copyright holder shall not be used to endorse or * promote products derived from the Software without specific prior * written permission. * * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY. * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES, * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH, * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. * * __END_OF_JASPER_LICENSE__ */ /* * JP2 Library * * $Id$ */ /******************************************************************************\* Includes.\******************************************************************************/ #include "jp2_dec.h"#include "jp2_cod.h" #include "jasper/jas_image.h"#include "jasper/jas_stream.h"#include "jasper/jas_math.h"#include "jasper/jas_debug.h"#include "jasper/jas_malloc.h"#include "jasper/jas_types.h" /******************************************************************************\* Function prototypes.\******************************************************************************/ static jp2_dec_t *jp2_dec_create(void);static void jp2_dec_destroy(jp2_dec_t *dec);static int jp2_getcs(jp2_colr_t *colr);static int fromiccpcs(int cs);static int jp2_getct(int colorspace, int type, int assoc); /******************************************************************************\* Functions.\******************************************************************************/ jas_image_t *jp2_decode(jas_stream_t *in, const char *optstr){ jp2_box_t *box; int found; jas_image_t *image; jp2_dec_t *dec; bool samedtype; int dtype; unsigned int i; jp2_cmap_t *cmapd; jp2_pclr_t *pclrd;#if 0 /* The following code appears to no longer be needed. */ jp2_cdef_t *cdefd;#endif unsigned int channo; int newcmptno; int_fast32_t *lutents;#if 0 jp2_cdefchan_t *cdefent; int cmptno;#endif jp2_cmapent_t *cmapent; jas_icchdr_t icchdr; jas_iccprof_t *iccprof; box = 0; image = 0; JAS_LOGDEBUGF(100, "jp2_decode(%p, \"%s\")\n", in, optstr); if (!(dec = jp2_dec_create())) { goto error; } /* Get the first box. This should be a JP box. */ if (!(box = jp2_box_get(in))) { jas_logerrorf("error: cannot get box\n"); goto error; } if (box->type != JP2_BOX_JP) { jas_logerrorf("error: expecting signature box\n"); goto error; } if (box->data.jp.magic != JP2_JP_MAGIC) { jas_logerrorf("incorrect magic number (0x%lx != 0x%lx)\n", JAS_CAST(unsigned long, box->data.jp.magic), JAS_CAST(unsigned long, JP2_JP_MAGIC)); goto error; } jp2_box_destroy(box); /* Get the second box. This should be a FTYP box. */ if (!(box = jp2_box_get(in))) { jas_logerrorf("error: cannot get box\n"); goto error; } if (box->type != JP2_BOX_FTYP) { jas_logerrorf("expecting file type box\n"); goto error; } jp2_box_destroy(box); /* Get more boxes... */ found = 0; while ((box = jp2_box_get(in))) { if (jas_get_debug_level() >= 1) { jas_logdebugf(1, "got box type %s\n", box->info->name); } switch (box->type) { case JP2_BOX_JP2C: found = 1; break; case JP2_BOX_IHDR: if (!dec->ihdr) { dec->ihdr = box; box = 0; } break; case JP2_BOX_BPCC: if (!dec->bpcc) { dec->bpcc = box; box = 0; } break; case JP2_BOX_CDEF: if (!dec->cdef) { dec->cdef = box; box = 0; } break; case JP2_BOX_PCLR: if (!dec->pclr) { dec->pclr = box; box = 0; } break; case JP2_BOX_CMAP: if (!dec->cmap) { dec->cmap = box; box = 0; } break; case JP2_BOX_COLR: if (!dec->colr) { dec->colr = box; box = 0; } break; } if (box) { jp2_box_destroy(box); box = 0; } if (found) { break; } } if (!found) { jas_logerrorf("error: no code stream found\n"); goto error; } if (!(dec->image = jpc_decode(in, optstr))) { jas_logerrorf("error: cannot decode code stream\n"); goto error; } /* An IHDR box must be present. */ if (!dec->ihdr) { jas_logerrorf("error: missing IHDR box\n"); goto error; } /* Does the number of components indicated in the IHDR box match the value specified in the code stream? */ if (dec->ihdr->data.ihdr.numcmpts != JAS_CAST(jas_uint, jas_image_numcmpts(dec->image))) { jas_logerrorf("error: number of components mismatch (IHDR)\n"); goto error; } /* At least one component must be present. */ if (!jas_image_numcmpts(dec->image)) { jas_logerrorf("error: no components\n"); goto error; } /* Determine if all components have the same data type. */ samedtype = true; dtype = jas_image_cmptdtype(dec->image, 0); for (i = 1; i < JAS_CAST(jas_uint, jas_image_numcmpts(dec->image)); ++i) { if (jas_image_cmptdtype(dec->image, i) != dtype) { samedtype = false; break; } } /* Is the component data type indicated in the IHDR box consistent with the data in the code stream? */ if ((samedtype && dec->ihdr->data.ihdr.bpc != JP2_DTYPETOBPC(dtype)) || (!samedtype && dec->ihdr->data.ihdr.bpc != JP2_IHDR_BPCNULL)) { jas_logerrorf("error: component data type mismatch (IHDR)\n"); goto error; } /* Is the compression type supported? */ if (dec->ihdr->data.ihdr.comptype != JP2_IHDR_COMPTYPE) { jas_logerrorf("error: unsupported compression type\n"); goto error; } if (dec->bpcc) { /* Is the number of components indicated in the BPCC box consistent with the code stream data? */ if (dec->bpcc->data.bpcc.numcmpts != JAS_CAST(jas_uint, jas_image_numcmpts(dec->image))) { jas_logerrorf("error: number of components mismatch (BPCC)\n"); goto error; } /* Is the component data type information indicated in the BPCC box consistent with the code stream data? */ if (!samedtype) { for (i = 0; i < JAS_CAST(jas_uint, jas_image_numcmpts(dec->image)); ++i) { if (jas_image_cmptdtype(dec->image, i) != JP2_BPCTODTYPE(dec->bpcc->data.bpcc.bpcs[i])) { jas_logerrorf("error: component data type mismatch (BPCC)\n"); goto error; } } } else { jas_logwarnf("warning: superfluous BPCC box\n"); } } /* A COLR box must be present. */ if (!dec->colr) { jas_logerrorf("error: no COLR box\n"); goto error; } switch (dec->colr->data.colr.method) { case JP2_COLR_ENUM: jas_image_setclrspc(dec->image, jp2_getcs(&dec->colr->data.colr)); break; case JP2_COLR_ICC: iccprof = jas_iccprof_createfrombuf(dec->colr->data.colr.iccp, dec->colr->data.colr.iccplen); if (!iccprof) { jas_logerrorf("error: failed to parse ICC profile\n"); goto error; } jas_iccprof_gethdr(iccprof, &icchdr); JAS_LOGDEBUGF(2, "ICC Profile CS %08x\n", icchdr.colorspc); dec->image->cmprof_ = jas_cmprof_createfromiccprof(iccprof); if (!dec->image->cmprof_) { jas_image_setclrspc(dec->image, JAS_CLRSPC_UNKNOWN); jas_logwarnf("warning: cannot create CM profile from ICC profile\n"); } else { jas_image_setclrspc(dec->image, fromiccpcs(icchdr.colorspc)); } jas_iccprof_destroy(iccprof); break; } /* If a CMAP box is present, a PCLR box must also be present. */ if (dec->cmap && !dec->pclr) { jas_logwarnf("warning: missing PCLR box or superfluous CMAP box\n"); jp2_box_destroy(dec->cmap); dec->cmap = 0; } /* If a CMAP box is not present, a PCLR box must not be present. */ if (!dec->cmap && dec->pclr) { jas_logwarnf("warning: missing CMAP box or superfluous PCLR box\n"); jp2_box_destroy(dec->pclr); dec->pclr = 0; } /* Determine the number of channels (which is essentially the number of components after any palette mappings have been applied). */ dec->numchans = dec->cmap ? dec->cmap->data.cmap.numchans : JAS_CAST(jas_uint, jas_image_numcmpts(dec->image)); /* Perform a basic sanity check on the CMAP box if present. */ if (dec->cmap) { for (i = 0; i < dec->numchans; ++i) { /* Is the component number reasonable? */ if (dec->cmap->data.cmap.ents[i].cmptno >= JAS_CAST(jas_uint, jas_image_numcmpts(dec->image))) { jas_logerrorf("error: invalid component number in CMAP box\n"); goto error; } /* Is the LUT index reasonable? */ if (dec->cmap->data.cmap.ents[i].pcol >= dec->pclr->data.pclr.numchans) { jas_logerrorf("error: invalid CMAP LUT index\n"); goto error; } } } /* Allocate space for the channel-number to component-number LUT. */ if (!(dec->chantocmptlut = jas_alloc2(dec->numchans, sizeof(uint_fast16_t)))) { jas_logerrorf("error: no memory\n"); goto error; } if (!dec->cmap) { for (i = 0; i < dec->numchans; ++i) { dec->chantocmptlut[i] = i; } } else { /* Check to ensure that CMAP/PCLR were initialized. */ if (!dec->cmap || !dec->pclr) { jas_logerrorf("missing CMAP/PCLR box\n"); goto error; } cmapd = &dec->cmap->data.cmap; pclrd = &dec->pclr->data.pclr;#if 0 /* The following code appears to no longer be needed. */ cdefd = &dec->cdef->data.cdef;#endif for (channo = 0; channo < cmapd->numchans; ++channo) { cmapent = &cmapd->ents[channo]; if (cmapent->map == JP2_CMAP_DIRECT) { dec->chantocmptlut[channo] = channo; } else if (cmapent->map == JP2_CMAP_PALETTE) { if (!pclrd->numlutents) { jas_logerrorf("error: empty LUT\n"); goto error; } if (!(lutents = jas_alloc2(pclrd->numlutents, sizeof(int_fast32_t)))) { jas_logerrorf("error: cannot allocate LUT\n"); goto error; } for (i = 0; i < pclrd->numlutents; ++i) { lutents[i] = pclrd->lutdata[cmapent->pcol + i * pclrd->numchans]; } newcmptno = jas_image_numcmpts(dec->image); if (jas_image_depalettize(dec->image, cmapent->cmptno, pclrd->numlutents, lutents, JP2_BPCTODTYPE(pclrd->bpc[cmapent->pcol]), newcmptno)) { jas_logerrorf("jas_image_depalettize failed\n"); jas_free(lutents); jas_logerrorf("error: depalettize failed\n"); goto error; } dec->chantocmptlut[channo] = newcmptno; jas_free(lutents);#if 0 /* The following code appears to no longer be needed. */ if (dec->cdef) { cdefent = jp2_cdef_lookup(cdefd, channo); if (!cdefent) { abort(); } jas_image_setcmpttype(dec->image, newcmptno, jp2_getct(jas_image_clrspc(dec->image), cdefent->type, cdefent->assoc)); } else { jas_image_setcmpttype(dec->image, newcmptno, jp2_getct(jas_image_clrspc(dec->image), 0, channo + 1)); }#endif } else { jas_logerrorf("error: invalid MTYP in CMAP box\n"); goto error; } } } #if 0 /* The following code appears to no longer be needed. */ /* Ensure that the number of channels being used by the decoder matches the number of image components. */ if (dec->numchans != jas_image_numcmpts(dec->image)) { jas_logerrorf("error: mismatch in number of components (%d != %d)\n", dec->numchans, jas_image_numcmpts(dec->image)); goto error; }#endif /* Mark all components as being of unknown type. */ for (i = 0; i < JAS_CAST(jas_uint, jas_image_numcmpts(dec->image)); ++i) { jas_image_setcmpttype(dec->image, i, JAS_IMAGE_CT_UNKNOWN); } /* Determine the type of each component. */ if (dec->cdef) { for (i = 0; i < dec->cdef->data.cdef.numchans; ++i) { uint_fast16_t channo = dec->cdef->data.cdef.ents[i].channo; /* Is the channel number reasonable? */ if (channo >= dec->numchans) { jas_logerrorf("error: invalid channel number in CDEF box (%d)\n", channo); goto error; } unsigned compno = dec->chantocmptlut[channo]; if (compno >= jas_image_numcmpts(dec->image)) { jas_logerrorf( "error: invalid component reference in CDEF box (%d)\n", compno); goto error; } jas_image_setcmpttype(dec->image, compno, jp2_getct(jas_image_clrspc(dec->image), dec->cdef->data.cdef.ents[i].type, dec->cdef->data.cdef.ents[i].assoc)); } } else { for (i = 0; i < dec->numchans; ++i) { unsigned compno = dec->chantocmptlut[i]; if (compno >= jas_image_numcmpts(dec->image)) { jas_logerrorf( "error: invalid component reference (%d)\n", compno); goto error; } jas_image_setcmpttype(dec->image, compno, jp2_getct(jas_image_clrspc(dec->image), 0, i + 1)); } } /* Delete any components that are not of interest. */ for (i = jas_image_numcmpts(dec->image); i > 0; --i) { if (jas_image_cmpttype(dec->image, i - 1) == JAS_IMAGE_CT_UNKNOWN) { jas_image_delcmpt(dec->image, i - 1); } } /* Ensure that some components survived. */ if (!jas_image_numcmpts(dec->image)) { jas_logerrorf("error: no components\n"); goto error; } /* Prevent the image from being destroyed later. */ image = dec->image; dec->image = 0;Lines 1–500 of 657. 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/* * Copyright (c) 1999-2000 Image Power, Inc. and the University of * British Columbia. * Copyright (c) 2001-2003 Michael David Adams. * All rights reserved. */ /* __START_OF_JASPER_LICENSE__ * * JasPer License Version 2.0 * * Copyright (c) 2001-2006 Michael David Adams * Copyright (c) 1999-2000 Image Power, Inc. * Copyright (c) 1999-2000 The University of British Columbia * * All rights reserved. * * Permission is hereby granted, free of charge, to any person (the * "User") obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, * publish, distribute, and/or sell copies of the Software, and to permit * persons to whom the Software is furnished to do so, subject to the * following conditions: * * 1. The above copyright notices and this permission notice (which * includes the disclaimer below) shall be included in all copies or * substantial portions of the Software. * * 2. The name of a copyright holder shall not be used to endorse or * promote products derived from the Software without specific prior * written permission. * * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY. * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES, * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH, * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. * * __END_OF_JASPER_LICENSE__ */ /* * JP2 Library * * $Id$ */ /******************************************************************************\ * Includes. \******************************************************************************/ #include "jp2_dec.h" #include "jp2_cod.h" #include "jasper/jas_image.h" #include "jasper/jas_stream.h" #include "jasper/jas_math.h" #include "jasper/jas_debug.h" #include "jasper/jas_malloc.h" #include "jasper/jas_types.h" /******************************************************************************\ * Function prototypes. \******************************************************************************/ static jp2_dec_t *jp2_dec_create(void); static void jp2_dec_destroy(jp2_dec_t *dec); static int jp2_getcs(jp2_colr_t *colr); static int fromiccpcs(int cs); static int jp2_getct(int colorspace, int type, int assoc); /******************************************************************************\ * Functions. \******************************************************************************/ jas_image_t *jp2_decode(jas_stream_t *in, const char *optstr) { jp2_box_t *box; int found; jas_image_t *image; jp2_dec_t *dec; bool samedtype; int dtype; unsigned int i; jp2_cmap_t *cmapd; jp2_pclr_t *pclrd; #if 0 /* The following code appears to no longer be needed. */ jp2_cdef_t *cdefd; #endif unsigned int channo; int newcmptno; int_fast32_t *lutents; #if 0 jp2_cdefchan_t *cdefent; int cmptno; #endif jp2_cmapent_t *cmapent; jas_icchdr_t icchdr; jas_iccprof_t *iccprof; box = 0; image = 0; JAS_LOGDEBUGF(100, "jp2_decode(%p, \"%s\")\n", in, optstr); if (!(dec = jp2_dec_create())) { goto error; } /* Get the first box. This should be a JP box. */ if (!(box = jp2_box_get(in))) { jas_logerrorf("error: cannot get box\n"); goto error; } if (box->type != JP2_BOX_JP) { jas_logerrorf("error: expecting signature box\n"); goto error; } if (box->data.jp.magic != JP2_JP_MAGIC) { jas_logerrorf("incorrect magic number (0x%lx != 0x%lx)\n", JAS_CAST(unsigned long, box->data.jp.magic), JAS_CAST(unsigned long, JP2_JP_MAGIC)); goto error; } jp2_box_destroy(box); /* Get the second box. This should be a FTYP box. */ if (!(box = jp2_box_get(in))) { jas_logerrorf("error: cannot get box\n"); goto error; } if (box->type != JP2_BOX_FTYP) { jas_logerrorf("expecting file type box\n"); goto error; } jp2_box_destroy(box); /* Get more boxes... */ found = 0; while ((box = jp2_box_get(in))) { if (jas_get_debug_level() >= 1) { jas_logdebugf(1, "got box type %s\n", box->info->name); } switch (box->type) { case JP2_BOX_JP2C: found = 1; break; case JP2_BOX_IHDR: if (!dec->ihdr) { dec->ihdr = box; box = 0; } break; case JP2_BOX_BPCC: if (!dec->bpcc) { dec->bpcc = box; box = 0; } break; case JP2_BOX_CDEF: if (!dec->cdef) { dec->cdef = box; box = 0; } break; case JP2_BOX_PCLR: if (!dec->pclr) { dec->pclr = box; box = 0; } break; case JP2_BOX_CMAP: if (!dec->cmap) { dec->cmap = box; box = 0; } break; case JP2_BOX_COLR: if (!dec->colr) { dec->colr = box; box = 0; } break; } if (box) { jp2_box_destroy(box); box = 0; } if (found) { break; } } if (!found) { jas_logerrorf("error: no code stream found\n"); goto error; } if (!(dec->image = jpc_decode(in, optstr))) { jas_logerrorf("error: cannot decode code stream\n"); goto error; } /* An IHDR box must be present. */ if (!dec->ihdr) { jas_logerrorf("error: missing IHDR box\n"); goto error; } /* Does the number of components indicated in the IHDR box match the value specified in the code stream? */ if (dec->ihdr->data.ihdr.numcmpts != JAS_CAST(jas_uint, jas_image_numcmpts(dec->image))) { jas_logerrorf("error: number of components mismatch (IHDR)\n"); goto error; } /* At least one component must be present. */ if (!jas_image_numcmpts(dec->image)) { jas_logerrorf("error: no components\n"); goto error; } /* Determine if all components have the same data type. */ samedtype = true; dtype = jas_image_cmptdtype(dec->image, 0); for (i = 1; i < JAS_CAST(jas_uint, jas_image_numcmpts(dec->image)); ++i) { if (jas_image_cmptdtype(dec->image, i) != dtype) { samedtype = false; break; } } /* Is the component data type indicated in the IHDR box consistent with the data in the code stream? */ if ((samedtype && dec->ihdr->data.ihdr.bpc != JP2_DTYPETOBPC(dtype)) || (!samedtype && dec->ihdr->data.ihdr.bpc != JP2_IHDR_BPCNULL)) { jas_logerrorf("error: component data type mismatch (IHDR)\n"); goto error; } /* Is the compression type supported? */ if (dec->ihdr->data.ihdr.comptype != JP2_IHDR_COMPTYPE) { jas_logerrorf("error: unsupported compression type\n"); goto error; } if (dec->bpcc) { /* Is the number of components indicated in the BPCC box consistent with the code stream data? */ if (dec->bpcc->data.bpcc.numcmpts != JAS_CAST(jas_uint, jas_image_numcmpts(dec->image))) { jas_logerrorf("error: number of components mismatch (BPCC)\n"); goto error; } /* Is the component data type information indicated in the BPCC box consistent with the code stream data? */ if (!samedtype) { for (i = 0; i < JAS_CAST(jas_uint, jas_image_numcmpts(dec->image)); ++i) { if (jas_image_cmptdtype(dec->image, i) != JP2_BPCTODTYPE(dec->bpcc->data.bpcc.bpcs[i])) { jas_logerrorf("error: component data type mismatch (BPCC)\n"); goto error; } } } else { jas_logwarnf("warning: superfluous BPCC box\n"); } } /* A COLR box must be present. */ if (!dec->colr) { jas_logerrorf("error: no COLR box\n"); goto error; } switch (dec->colr->data.colr.method) { case JP2_COLR_ENUM: jas_image_setclrspc(dec->image, jp2_getcs(&dec->colr->data.colr)); break; case JP2_COLR_ICC: iccprof = jas_iccprof_createfrombuf(dec->colr->data.colr.iccp, dec->colr->data.colr.iccplen); if (!iccprof) { jas_logerrorf("error: failed to parse ICC profile\n"); goto error; } jas_iccprof_gethdr(iccprof, &icchdr); JAS_LOGDEBUGF(2, "ICC Profile CS %08x\n", icchdr.colorspc); dec->image->cmprof_ = jas_cmprof_createfromiccprof(iccprof); if (!dec->image->cmprof_) { jas_image_setclrspc(dec->image, JAS_CLRSPC_UNKNOWN); jas_logwarnf("warning: cannot create CM profile from ICC profile\n"); } else { jas_image_setclrspc(dec->image, fromiccpcs(icchdr.colorspc)); } jas_iccprof_destroy(iccprof); break; } /* If a CMAP box is present, a PCLR box must also be present. */ if (dec->cmap && !dec->pclr) { jas_logwarnf("warning: missing PCLR box or superfluous CMAP box\n"); jp2_box_destroy(dec->cmap); dec->cmap = 0; } /* If a CMAP box is not present, a PCLR box must not be present. */ if (!dec->cmap && dec->pclr) { jas_logwarnf("warning: missing CMAP box or superfluous PCLR box\n"); jp2_box_destroy(dec->pclr); dec->pclr = 0; } /* Determine the number of channels (which is essentially the number of components after any palette mappings have been applied). */ dec->numchans = dec->cmap ? dec->cmap->data.cmap.numchans : JAS_CAST(jas_uint, jas_image_numcmpts(dec->image)); /* Perform a basic sanity check on the CMAP box if present. */ if (dec->cmap) { for (i = 0; i < dec->numchans; ++i) { /* Is the component number reasonable? */ if (dec->cmap->data.cmap.ents[i].cmptno >= JAS_CAST(jas_uint, jas_image_numcmpts(dec->image))) { jas_logerrorf("error: invalid component number in CMAP box\n"); goto error; } /* Is the LUT index reasonable? */ if (dec->cmap->data.cmap.ents[i].pcol >= dec->pclr->data.pclr.numchans) { jas_logerrorf("error: invalid CMAP LUT index\n"); goto error; } } } /* Allocate space for the channel-number to component-number LUT. */ if (!(dec->chantocmptlut = jas_alloc2(dec->numchans, sizeof(uint_fast16_t)))) { jas_logerrorf("error: no memory\n"); goto error; } if (!dec->cmap) { for (i = 0; i < dec->numchans; ++i) { dec->chantocmptlut[i] = i; } } else { /* Check to ensure that CMAP/PCLR were initialized. */ if (!dec->cmap || !dec->pclr) { jas_logerrorf("missing CMAP/PCLR box\n"); goto error; } cmapd = &dec->cmap->data.cmap; pclrd = &dec->pclr->data.pclr; #if 0 /* The following code appears to no longer be needed. */ cdefd = &dec->cdef->data.cdef; #endif for (channo = 0; channo < cmapd->numchans; ++channo) { cmapent = &cmapd->ents[channo]; if (cmapent->map == JP2_CMAP_DIRECT) { dec->chantocmptlut[channo] = channo; } else if (cmapent->map == JP2_CMAP_PALETTE) { if (!pclrd->numlutents) { jas_logerrorf("error: empty LUT\n"); goto error; } if (!(lutents = jas_alloc2(pclrd->numlutents, sizeof(int_fast32_t)))) { jas_logerrorf("error: cannot allocate LUT\n"); goto error; } for (i = 0; i < pclrd->numlutents; ++i) { lutents[i] = pclrd->lutdata[cmapent->pcol + i * pclrd->numchans]; } newcmptno = jas_image_numcmpts(dec->image); if (jas_image_depalettize(dec->image, cmapent->cmptno, pclrd->numlutents, lutents, JP2_BPCTODTYPE(pclrd->bpc[cmapent->pcol]), newcmptno)) { jas_logerrorf("jas_image_depalettize failed\n"); jas_free(lutents); jas_logerrorf("error: depalettize failed\n"); goto error; } dec->chantocmptlut[channo] = newcmptno; jas_free(lutents); #if 0 /* The following code appears to no longer be needed. */ if (dec->cdef) { cdefent = jp2_cdef_lookup(cdefd, channo); if (!cdefent) { abort(); } jas_image_setcmpttype(dec->image, newcmptno, jp2_getct(jas_image_clrspc(dec->image), cdefent->type, cdefent->assoc)); } else { jas_image_setcmpttype(dec->image, newcmptno, jp2_getct(jas_image_clrspc(dec->image), 0, channo + 1)); } #endif } else { jas_logerrorf("error: invalid MTYP in CMAP box\n"); goto error; } } } #if 0 /* The following code appears to no longer be needed. */ /* Ensure that the number of channels being used by the decoder matches the number of image components. */ if (dec->numchans != jas_image_numcmpts(dec->image)) { jas_logerrorf("error: mismatch in number of components (%d != %d)\n", dec->numchans, jas_image_numcmpts(dec->image)); goto error; } #endif /* Mark all components as being of unknown type. */ for (i = 0; i < JAS_CAST(jas_uint, jas_image_numcmpts(dec->image)); ++i) { jas_image_setcmpttype(dec->image, i, JAS_IMAGE_CT_UNKNOWN); } /* Determine the type of each component. */ if (dec->cdef) { for (i = 0; i < dec->cdef->data.cdef.numchans; ++i) { uint_fast16_t channo = dec->cdef->data.cdef.ents[i].channo; /* Is the channel number reasonable? */ if (channo >= dec->numchans) { jas_logerrorf("error: invalid channel number in CDEF box (%d)\n", channo); goto error; } unsigned compno = dec->chantocmptlut[channo]; if (compno >= jas_image_numcmpts(dec->image)) { jas_logerrorf( "error: invalid component reference in CDEF box (%d)\n", compno); goto error; } jas_image_setcmpttype(dec->image, compno, jp2_getct(jas_image_clrspc(dec->image), dec->cdef->data.cdef.ents[i].type, dec->cdef->data.cdef.ents[i].assoc)); } } else { for (i = 0; i < dec->numchans; ++i) { unsigned compno = dec->chantocmptlut[i]; if (compno >= jas_image_numcmpts(dec->image)) { jas_logerrorf( "error: invalid component reference (%d)\n", compno); goto error; } jas_image_setcmpttype(dec->image, compno, jp2_getct(jas_image_clrspc(dec->image), 0, i + 1)); } } /* Delete any components that are not of interest. */ for (i = jas_image_numcmpts(dec->image); i > 0; --i) { if (jas_image_cmpttype(dec->image, i - 1) == JAS_IMAGE_CT_UNKNOWN) { jas_image_delcmpt(dec->image, i - 1); } } /* Ensure that some components survived. */ if (!jas_image_numcmpts(dec->image)) { jas_logerrorf("error: no components\n"); goto error; } /* Prevent the image from being destroyed later. */ image = dec->image; dec->image = 0;