2
* Matroska file demuxer
3
* Copyright (c) 2003-2008 The Libav Project
5
* This file is part of Libav.
7
* Libav is free software; you can redistribute it and/or
8
* modify it under the terms of the GNU Lesser General Public
9
* License as published by the Free Software Foundation; either
10
* version 2.1 of the License, or (at your option) any later version.
12
* Libav is distributed in the hope that it will be useful,
13
* but WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* Lesser General Public License for more details.
17
* You should have received a copy of the GNU Lesser General Public
18
* License along with Libav; if not, write to the Free Software
19
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24
* Matroska file demuxer
25
* by Ronald Bultje <rbultje@ronald.bitfreak.net>
26
* with a little help from Moritz Bunkus <moritz@bunkus.org>
27
* totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28
* Specs available on the Matroska project page: http://www.matroska.org/.
34
#include "avio_internal.h"
35
/* For ff_codec_get_id(). */
40
#include "libavcodec/mpeg4audio.h"
41
#include "libavutil/intfloat_readwrite.h"
42
#include "libavutil/intreadwrite.h"
43
#include "libavutil/avstring.h"
44
#include "libavutil/lzo.h"
45
#include "libavutil/dict.h"
66
typedef const struct EbmlSyntax {
75
const struct EbmlSyntax *n;
95
uint64_t doctype_version;
101
} MatroskaTrackCompression;
106
MatroskaTrackCompression compression;
107
} MatroskaTrackEncoding;
111
uint64_t display_width;
112
uint64_t display_height;
113
uint64_t pixel_width;
114
uint64_t pixel_height;
116
} MatroskaTrackVideo;
120
double out_samplerate;
124
/* real audio header (extracted from extradata) */
131
uint64_t buf_timecode;
133
} MatroskaTrackAudio;
144
uint64_t default_duration;
145
uint64_t flag_default;
146
uint64_t flag_forced;
147
MatroskaTrackVideo video;
148
MatroskaTrackAudio audio;
152
int64_t end_timecode;
163
} MatroskaAttachement;
201
MatroskaTagTarget target;
216
AVFormatContext *ctx;
220
MatroskaLevel levels[EBML_MAX_DEPTH];
228
EbmlList attachments;
234
/* byte position of the segment inside the stream */
235
int64_t segment_start;
237
/* the packet queue */
244
/* What to skip before effectively reading a packet. */
245
int skip_to_keyframe;
246
uint64_t skip_to_timecode;
247
} MatroskaDemuxContext;
261
static EbmlSyntax ebml_header[] = {
262
{ EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
263
{ EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
264
{ EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
265
{ EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
266
{ EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
267
{ EBML_ID_EBMLVERSION, EBML_NONE },
268
{ EBML_ID_DOCTYPEVERSION, EBML_NONE },
272
static EbmlSyntax ebml_syntax[] = {
273
{ EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
277
static EbmlSyntax matroska_info[] = {
278
{ MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
279
{ MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
280
{ MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
281
{ MATROSKA_ID_WRITINGAPP, EBML_NONE },
282
{ MATROSKA_ID_MUXINGAPP, EBML_NONE },
283
{ MATROSKA_ID_DATEUTC, EBML_NONE },
284
{ MATROSKA_ID_SEGMENTUID, EBML_NONE },
288
static EbmlSyntax matroska_track_video[] = {
289
{ MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
290
{ MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
291
{ MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
292
{ MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
293
{ MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
294
{ MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) },
295
{ MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
296
{ MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
297
{ MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
298
{ MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
299
{ MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
300
{ MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
301
{ MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE },
302
{ MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
306
static EbmlSyntax matroska_track_audio[] = {
307
{ MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
308
{ MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
309
{ MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
310
{ MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
314
static EbmlSyntax matroska_track_encoding_compression[] = {
315
{ MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
316
{ MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
320
static EbmlSyntax matroska_track_encoding[] = {
321
{ MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
322
{ MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
323
{ MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
324
{ MATROSKA_ID_ENCODINGORDER, EBML_NONE },
328
static EbmlSyntax matroska_track_encodings[] = {
329
{ MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
333
static EbmlSyntax matroska_track[] = {
334
{ MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
335
{ MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
336
{ MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
337
{ MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
338
{ MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
339
{ MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
340
{ MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
341
{ MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
342
{ MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
343
{ MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
344
{ MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
345
{ MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
346
{ MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
347
{ MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
348
{ MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
349
{ MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
350
{ MATROSKA_ID_CODECNAME, EBML_NONE },
351
{ MATROSKA_ID_CODECDECODEALL, EBML_NONE },
352
{ MATROSKA_ID_CODECINFOURL, EBML_NONE },
353
{ MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
354
{ MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
355
{ MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
356
{ MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
360
static EbmlSyntax matroska_tracks[] = {
361
{ MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
365
static EbmlSyntax matroska_attachment[] = {
366
{ MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
367
{ MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
368
{ MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
369
{ MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
370
{ MATROSKA_ID_FILEDESC, EBML_NONE },
374
static EbmlSyntax matroska_attachments[] = {
375
{ MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
379
static EbmlSyntax matroska_chapter_display[] = {
380
{ MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
381
{ MATROSKA_ID_CHAPLANG, EBML_NONE },
385
static EbmlSyntax matroska_chapter_entry[] = {
386
{ MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
387
{ MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
388
{ MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
389
{ MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
390
{ MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
391
{ MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
392
{ MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
393
{ MATROSKA_ID_CHAPTERATOM, EBML_NONE },
397
static EbmlSyntax matroska_chapter[] = {
398
{ MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
399
{ MATROSKA_ID_EDITIONUID, EBML_NONE },
400
{ MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
401
{ MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
402
{ MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
406
static EbmlSyntax matroska_chapters[] = {
407
{ MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
411
static EbmlSyntax matroska_index_pos[] = {
412
{ MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
413
{ MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
414
{ MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
418
static EbmlSyntax matroska_index_entry[] = {
419
{ MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
420
{ MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
424
static EbmlSyntax matroska_index[] = {
425
{ MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
429
static EbmlSyntax matroska_simpletag[] = {
430
{ MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
431
{ MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
432
{ MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
433
{ MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
434
{ MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
435
{ MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
439
static EbmlSyntax matroska_tagtargets[] = {
440
{ MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
441
{ MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
442
{ MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
443
{ MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
444
{ MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
448
static EbmlSyntax matroska_tag[] = {
449
{ MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
450
{ MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
454
static EbmlSyntax matroska_tags[] = {
455
{ MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
459
static EbmlSyntax matroska_seekhead_entry[] = {
460
{ MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
461
{ MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
465
static EbmlSyntax matroska_seekhead[] = {
466
{ MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
470
static EbmlSyntax matroska_segment[] = {
471
{ MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
472
{ MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
473
{ MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
474
{ MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
475
{ MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
476
{ MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
477
{ MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
478
{ MATROSKA_ID_CLUSTER, EBML_STOP },
482
static EbmlSyntax matroska_segments[] = {
483
{ MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
487
static EbmlSyntax matroska_blockgroup[] = {
488
{ MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
489
{ MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
490
{ MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
491
{ MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
492
{ 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
496
static EbmlSyntax matroska_cluster[] = {
497
{ MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
498
{ MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
499
{ MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
500
{ MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
501
{ MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
505
static EbmlSyntax matroska_clusters[] = {
506
{ MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
507
{ MATROSKA_ID_INFO, EBML_NONE },
508
{ MATROSKA_ID_CUES, EBML_NONE },
509
{ MATROSKA_ID_TAGS, EBML_NONE },
510
{ MATROSKA_ID_SEEKHEAD, EBML_NONE },
514
static const char *matroska_doctypes[] = { "matroska", "webm" };
517
* Return: Whether we reached the end of a level in the hierarchy or not.
519
static int ebml_level_end(MatroskaDemuxContext *matroska)
521
AVIOContext *pb = matroska->ctx->pb;
522
int64_t pos = avio_tell(pb);
524
if (matroska->num_levels > 0) {
525
MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
526
if (pos - level->start >= level->length || matroska->current_id) {
527
matroska->num_levels--;
535
* Read: an "EBML number", which is defined as a variable-length
536
* array of bytes. The first byte indicates the length by giving a
537
* number of 0-bits followed by a one. The position of the first
538
* "one" bit inside the first byte indicates the length of this
540
* Returns: number of bytes read, < 0 on error
542
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
543
int max_size, uint64_t *number)
548
/* The first byte tells us the length in bytes - avio_r8() can normally
549
* return 0, but since that's not a valid first ebmlID byte, we can
550
* use it safely here to catch EOS. */
551
if (!(total = avio_r8(pb))) {
552
/* we might encounter EOS here */
553
if (!pb->eof_reached) {
554
int64_t pos = avio_tell(pb);
555
av_log(matroska->ctx, AV_LOG_ERROR,
556
"Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
559
return AVERROR(EIO); /* EOS or actual I/O error */
562
/* get the length of the EBML number */
563
read = 8 - ff_log2_tab[total];
564
if (read > max_size) {
565
int64_t pos = avio_tell(pb) - 1;
566
av_log(matroska->ctx, AV_LOG_ERROR,
567
"Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
568
(uint8_t) total, pos, pos);
569
return AVERROR_INVALIDDATA;
572
/* read out length */
573
total ^= 1 << ff_log2_tab[total];
575
total = (total << 8) | avio_r8(pb);
583
* Read a EBML length value.
584
* This needs special handling for the "unknown length" case which has multiple
587
static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
590
int res = ebml_read_num(matroska, pb, 8, number);
591
if (res > 0 && *number + 1 == 1ULL << (7 * res))
592
*number = 0xffffffffffffffULL;
597
* Read the next element as an unsigned int.
598
* 0 is success, < 0 is failure.
600
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
605
return AVERROR_INVALIDDATA;
607
/* big-endian ordering; build up number */
610
*num = (*num << 8) | avio_r8(pb);
616
* Read the next element as a float.
617
* 0 is success, < 0 is failure.
619
static int ebml_read_float(AVIOContext *pb, int size, double *num)
623
} else if (size == 4) {
624
*num= av_int2flt(avio_rb32(pb));
626
*num= av_int2dbl(avio_rb64(pb));
628
return AVERROR_INVALIDDATA;
634
* Read the next element as an ASCII string.
635
* 0 is success, < 0 is failure.
637
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
640
/* EBML strings are usually not 0-terminated, so we allocate one
641
* byte more, read the string and NULL-terminate it ourselves. */
642
if (!(*str = av_malloc(size + 1)))
643
return AVERROR(ENOMEM);
644
if (avio_read(pb, (uint8_t *) *str, size) != size) {
654
* Read the next element as binary data.
655
* 0 is success, < 0 is failure.
657
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
660
if (!(bin->data = av_malloc(length)))
661
return AVERROR(ENOMEM);
664
bin->pos = avio_tell(pb);
665
if (avio_read(pb, bin->data, length) != length) {
666
av_freep(&bin->data);
674
* Read the next element, but only the header. The contents
675
* are supposed to be sub-elements which can be read separately.
676
* 0 is success, < 0 is failure.
678
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
680
AVIOContext *pb = matroska->ctx->pb;
681
MatroskaLevel *level;
683
if (matroska->num_levels >= EBML_MAX_DEPTH) {
684
av_log(matroska->ctx, AV_LOG_ERROR,
685
"File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
686
return AVERROR(ENOSYS);
689
level = &matroska->levels[matroska->num_levels++];
690
level->start = avio_tell(pb);
691
level->length = length;
697
* Read signed/unsigned "EBML" numbers.
698
* Return: number of bytes processed, < 0 on error
700
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
701
uint8_t *data, uint32_t size, uint64_t *num)
704
ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
705
return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
709
* Same as above, but signed.
711
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
712
uint8_t *data, uint32_t size, int64_t *num)
717
/* read as unsigned number first */
718
if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
721
/* make signed (weird way) */
722
*num = unum - ((1LL << (7*res - 1)) - 1);
727
static int ebml_parse_elem(MatroskaDemuxContext *matroska,
728
EbmlSyntax *syntax, void *data);
730
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
731
uint32_t id, void *data)
734
for (i=0; syntax[i].id; i++)
735
if (id == syntax[i].id)
737
if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
738
matroska->num_levels > 0 &&
739
matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
740
return 0; // we reached the end of an unknown size cluster
741
if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32)
742
av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
743
return ebml_parse_elem(matroska, &syntax[i], data);
746
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
749
if (!matroska->current_id) {
751
int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
754
matroska->current_id = id | 1 << 7*res;
756
return ebml_parse_id(matroska, syntax, matroska->current_id, data);
759
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
764
for (i=0; syntax[i].id; i++)
765
switch (syntax[i].type) {
767
*(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
770
*(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
774
*(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
778
while (!res && !ebml_level_end(matroska))
779
res = ebml_parse(matroska, syntax, data);
784
static int ebml_parse_elem(MatroskaDemuxContext *matroska,
785
EbmlSyntax *syntax, void *data)
787
static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
790
// max. 16 MB for strings
791
[EBML_STR] = 0x1000000,
792
[EBML_UTF8] = 0x1000000,
793
// max. 256 MB for binary data
794
[EBML_BIN] = 0x10000000,
795
// no limits for anything else
797
AVIOContext *pb = matroska->ctx->pb;
798
uint32_t id = syntax->id;
802
data = (char *)data + syntax->data_offset;
803
if (syntax->list_elem_size) {
804
EbmlList *list = data;
805
list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
806
data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
807
memset(data, 0, syntax->list_elem_size);
811
if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
812
matroska->current_id = 0;
813
if ((res = ebml_read_length(matroska, pb, &length)) < 0)
815
if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
816
av_log(matroska->ctx, AV_LOG_ERROR,
817
"Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
818
length, max_lengths[syntax->type], syntax->type);
819
return AVERROR_INVALIDDATA;
823
switch (syntax->type) {
824
case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
825
case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
827
case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
828
case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
829
case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
831
if (id == MATROSKA_ID_SEGMENT)
832
matroska->segment_start = avio_tell(matroska->ctx->pb);
833
return ebml_parse_nest(matroska, syntax->def.n, data);
834
case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
835
case EBML_STOP: return 1;
836
default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
838
if (res == AVERROR_INVALIDDATA)
839
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
840
else if (res == AVERROR(EIO))
841
av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
845
static void ebml_free(EbmlSyntax *syntax, void *data)
848
for (i=0; syntax[i].id; i++) {
849
void *data_off = (char *)data + syntax[i].data_offset;
850
switch (syntax[i].type) {
852
case EBML_UTF8: av_freep(data_off); break;
853
case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
855
if (syntax[i].list_elem_size) {
856
EbmlList *list = data_off;
857
char *ptr = list->elem;
858
for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
859
ebml_free(syntax[i].def.n, ptr);
862
ebml_free(syntax[i].def.n, data_off);
872
static int matroska_probe(AVProbeData *p)
875
int len_mask = 0x80, size = 1, n = 1, i;
878
if (AV_RB32(p->buf) != EBML_ID_HEADER)
881
/* length of header */
883
while (size <= 8 && !(total & len_mask)) {
889
total &= (len_mask - 1);
891
total = (total << 8) | p->buf[4 + n++];
893
/* Does the probe data contain the whole header? */
894
if (p->buf_size < 4 + size + total)
897
/* The header should contain a known document type. For now,
898
* we don't parse the whole header but simply check for the
899
* availability of that array of characters inside the header.
900
* Not fully fool-proof, but good enough. */
901
for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
902
int probelen = strlen(matroska_doctypes[i]);
903
if (total < probelen)
905
for (n = 4+size; n <= 4+size+total-probelen; n++)
906
if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
907
return AVPROBE_SCORE_MAX;
910
// probably valid EBML header but no recognized doctype
911
return AVPROBE_SCORE_MAX/2;
914
static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
917
MatroskaTrack *tracks = matroska->tracks.elem;
920
for (i=0; i < matroska->tracks.nb_elem; i++)
921
if (tracks[i].num == num)
924
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
928
static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
929
MatroskaTrack *track)
931
MatroskaTrackEncoding *encodings = track->encodings.elem;
932
uint8_t* data = *buf;
933
int isize = *buf_size;
934
uint8_t* pkt_data = NULL;
935
int pkt_size = isize;
939
if (pkt_size >= 10000000)
942
switch (encodings[0].compression.algo) {
943
case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
944
return encodings[0].compression.settings.size;
945
case MATROSKA_TRACK_ENCODING_COMP_LZO:
947
olen = pkt_size *= 3;
948
pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
949
result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
950
} while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
956
case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
957
z_stream zstream = {0};
958
if (inflateInit(&zstream) != Z_OK)
960
zstream.next_in = data;
961
zstream.avail_in = isize;
964
pkt_data = av_realloc(pkt_data, pkt_size);
965
zstream.avail_out = pkt_size - zstream.total_out;
966
zstream.next_out = pkt_data + zstream.total_out;
967
result = inflate(&zstream, Z_NO_FLUSH);
968
} while (result==Z_OK && pkt_size<10000000);
969
pkt_size = zstream.total_out;
970
inflateEnd(&zstream);
971
if (result != Z_STREAM_END)
977
case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
978
bz_stream bzstream = {0};
979
if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
981
bzstream.next_in = data;
982
bzstream.avail_in = isize;
985
pkt_data = av_realloc(pkt_data, pkt_size);
986
bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
987
bzstream.next_out = pkt_data + bzstream.total_out_lo32;
988
result = BZ2_bzDecompress(&bzstream);
989
} while (result==BZ_OK && pkt_size<10000000);
990
pkt_size = bzstream.total_out_lo32;
991
BZ2_bzDecompressEnd(&bzstream);
992
if (result != BZ_STREAM_END)
1002
*buf_size = pkt_size;
1009
static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1010
AVPacket *pkt, uint64_t display_duration)
1012
char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
1013
for (; *ptr!=',' && ptr<end-1; ptr++);
1016
for (; *ptr!=',' && ptr<end-1; ptr++);
1018
int64_t end_pts = pkt->pts + display_duration;
1019
int sc = matroska->time_scale * pkt->pts / 10000000;
1020
int ec = matroska->time_scale * end_pts / 10000000;
1021
int sh, sm, ss, eh, em, es, len;
1022
sh = sc/360000; sc -= 360000*sh;
1023
sm = sc/ 6000; sc -= 6000*sm;
1024
ss = sc/ 100; sc -= 100*ss;
1025
eh = ec/360000; ec -= 360000*eh;
1026
em = ec/ 6000; ec -= 6000*em;
1027
es = ec/ 100; ec -= 100*es;
1029
len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1030
if (!(line = av_malloc(len)))
1032
snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1033
layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1036
pkt->size = strlen(line);
1040
static void matroska_merge_packets(AVPacket *out, AVPacket *in)
1042
out->data = av_realloc(out->data, out->size+in->size);
1043
memcpy(out->data+out->size, in->data, in->size);
1044
out->size += in->size;
1045
av_destruct_packet(in);
1049
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1050
AVDictionary **metadata, char *prefix)
1052
MatroskaTag *tags = list->elem;
1056
for (i=0; i < list->nb_elem; i++) {
1057
const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1059
if (!tags[i].name) {
1060
av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1063
if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1064
else av_strlcpy(key, tags[i].name, sizeof(key));
1065
if (tags[i].def || !lang) {
1066
av_dict_set(metadata, key, tags[i].string, 0);
1067
if (tags[i].sub.nb_elem)
1068
matroska_convert_tag(s, &tags[i].sub, metadata, key);
1071
av_strlcat(key, "-", sizeof(key));
1072
av_strlcat(key, lang, sizeof(key));
1073
av_dict_set(metadata, key, tags[i].string, 0);
1074
if (tags[i].sub.nb_elem)
1075
matroska_convert_tag(s, &tags[i].sub, metadata, key);
1078
ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1081
static void matroska_convert_tags(AVFormatContext *s)
1083
MatroskaDemuxContext *matroska = s->priv_data;
1084
MatroskaTags *tags = matroska->tags.elem;
1087
for (i=0; i < matroska->tags.nb_elem; i++) {
1088
if (tags[i].target.attachuid) {
1089
MatroskaAttachement *attachment = matroska->attachments.elem;
1090
for (j=0; j<matroska->attachments.nb_elem; j++)
1091
if (attachment[j].uid == tags[i].target.attachuid
1092
&& attachment[j].stream)
1093
matroska_convert_tag(s, &tags[i].tag,
1094
&attachment[j].stream->metadata, NULL);
1095
} else if (tags[i].target.chapteruid) {
1096
MatroskaChapter *chapter = matroska->chapters.elem;
1097
for (j=0; j<matroska->chapters.nb_elem; j++)
1098
if (chapter[j].uid == tags[i].target.chapteruid
1099
&& chapter[j].chapter)
1100
matroska_convert_tag(s, &tags[i].tag,
1101
&chapter[j].chapter->metadata, NULL);
1102
} else if (tags[i].target.trackuid) {
1103
MatroskaTrack *track = matroska->tracks.elem;
1104
for (j=0; j<matroska->tracks.nb_elem; j++)
1105
if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1106
matroska_convert_tag(s, &tags[i].tag,
1107
&track[j].stream->metadata, NULL);
1109
matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1110
tags[i].target.type);
1115
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1117
EbmlList *seekhead_list = &matroska->seekhead;
1118
MatroskaSeekhead *seekhead = seekhead_list->elem;
1119
uint32_t level_up = matroska->level_up;
1120
int64_t before_pos = avio_tell(matroska->ctx->pb);
1121
uint32_t saved_id = matroska->current_id;
1122
MatroskaLevel level;
1125
// we should not do any seeking in the streaming case
1126
if (!matroska->ctx->pb->seekable ||
1127
(matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1130
for (i=0; i<seekhead_list->nb_elem; i++) {
1131
int64_t offset = seekhead[i].pos + matroska->segment_start;
1133
if (seekhead[i].pos <= before_pos
1134
|| seekhead[i].id == MATROSKA_ID_SEEKHEAD
1135
|| seekhead[i].id == MATROSKA_ID_CLUSTER)
1139
if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) != offset)
1142
/* We don't want to lose our seekhead level, so we add
1143
* a dummy. This is a crude hack. */
1144
if (matroska->num_levels == EBML_MAX_DEPTH) {
1145
av_log(matroska->ctx, AV_LOG_INFO,
1146
"Max EBML element depth (%d) reached, "
1147
"cannot parse further.\n", EBML_MAX_DEPTH);
1152
level.length = (uint64_t)-1;
1153
matroska->levels[matroska->num_levels] = level;
1154
matroska->num_levels++;
1155
matroska->current_id = 0;
1157
ebml_parse(matroska, matroska_segment, matroska);
1159
/* remove dummy level */
1160
while (matroska->num_levels) {
1161
uint64_t length = matroska->levels[--matroska->num_levels].length;
1162
if (length == (uint64_t)-1)
1168
avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1169
matroska->level_up = level_up;
1170
matroska->current_id = saved_id;
1173
static int matroska_aac_profile(char *codec_id)
1175
static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1178
for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1179
if (strstr(codec_id, aac_profiles[profile]))
1184
static int matroska_aac_sri(int samplerate)
1188
for (sri=0; sri<FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++)
1189
if (ff_mpeg4audio_sample_rates[sri] == samplerate)
1194
static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
1196
MatroskaDemuxContext *matroska = s->priv_data;
1197
EbmlList *attachements_list = &matroska->attachments;
1198
MatroskaAttachement *attachements;
1199
EbmlList *chapters_list = &matroska->chapters;
1200
MatroskaChapter *chapters;
1201
MatroskaTrack *tracks;
1202
EbmlList *index_list;
1203
MatroskaIndex *index;
1204
int index_scale = 1;
1205
uint64_t max_start = 0;
1212
/* First read the EBML header. */
1213
if (ebml_parse(matroska, ebml_syntax, &ebml)
1214
|| ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1215
|| ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) {
1216
av_log(matroska->ctx, AV_LOG_ERROR,
1217
"EBML header using unsupported features\n"
1218
"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1219
ebml.version, ebml.doctype, ebml.doctype_version);
1220
ebml_free(ebml_syntax, &ebml);
1221
return AVERROR_PATCHWELCOME;
1223
for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1224
if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1226
if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1227
av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1229
ebml_free(ebml_syntax, &ebml);
1231
/* The next thing is a segment. */
1232
if ((res = ebml_parse(matroska, matroska_segments, matroska)) < 0)
1234
matroska_execute_seekhead(matroska);
1236
if (!matroska->time_scale)
1237
matroska->time_scale = 1000000;
1238
if (matroska->duration)
1239
matroska->ctx->duration = matroska->duration * matroska->time_scale
1240
* 1000 / AV_TIME_BASE;
1241
av_dict_set(&s->metadata, "title", matroska->title, 0);
1243
tracks = matroska->tracks.elem;
1244
for (i=0; i < matroska->tracks.nb_elem; i++) {
1245
MatroskaTrack *track = &tracks[i];
1246
enum CodecID codec_id = CODEC_ID_NONE;
1247
EbmlList *encodings_list = &tracks->encodings;
1248
MatroskaTrackEncoding *encodings = encodings_list->elem;
1249
uint8_t *extradata = NULL;
1250
int extradata_size = 0;
1251
int extradata_offset = 0;
1254
/* Apply some sanity checks. */
1255
if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1256
track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1257
track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1258
av_log(matroska->ctx, AV_LOG_INFO,
1259
"Unknown or unsupported track type %"PRIu64"\n",
1263
if (track->codec_id == NULL)
1266
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1267
if (!track->default_duration)
1268
track->default_duration = 1000000000/track->video.frame_rate;
1269
if (!track->video.display_width)
1270
track->video.display_width = track->video.pixel_width;
1271
if (!track->video.display_height)
1272
track->video.display_height = track->video.pixel_height;
1273
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1274
if (!track->audio.out_samplerate)
1275
track->audio.out_samplerate = track->audio.samplerate;
1277
if (encodings_list->nb_elem > 1) {
1278
av_log(matroska->ctx, AV_LOG_ERROR,
1279
"Multiple combined encodings no supported");
1280
} else if (encodings_list->nb_elem == 1) {
1281
if (encodings[0].type ||
1282
(encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1284
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1287
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1289
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1290
encodings[0].scope = 0;
1291
av_log(matroska->ctx, AV_LOG_ERROR,
1292
"Unsupported encoding type");
1293
} else if (track->codec_priv.size && encodings[0].scope&2) {
1294
uint8_t *codec_priv = track->codec_priv.data;
1295
int offset = matroska_decode_buffer(&track->codec_priv.data,
1296
&track->codec_priv.size,
1299
track->codec_priv.data = NULL;
1300
track->codec_priv.size = 0;
1301
av_log(matroska->ctx, AV_LOG_ERROR,
1302
"Failed to decode codec private data\n");
1303
} else if (offset > 0) {
1304
track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1305
memcpy(track->codec_priv.data,
1306
encodings[0].compression.settings.data, offset);
1307
memcpy(track->codec_priv.data+offset, codec_priv,
1308
track->codec_priv.size);
1309
track->codec_priv.size += offset;
1311
if (codec_priv != track->codec_priv.data)
1312
av_free(codec_priv);
1316
for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1317
if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1318
strlen(ff_mkv_codec_tags[j].str))){
1319
codec_id= ff_mkv_codec_tags[j].id;
1324
st = track->stream = av_new_stream(s, 0);
1326
return AVERROR(ENOMEM);
1328
if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1329
&& track->codec_priv.size >= 40
1330
&& track->codec_priv.data != NULL) {
1331
track->ms_compat = 1;
1332
track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1333
codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc);
1334
extradata_offset = 40;
1335
} else if (!strcmp(track->codec_id, "A_MS/ACM")
1336
&& track->codec_priv.size >= 14
1337
&& track->codec_priv.data != NULL) {
1339
ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1340
AVIO_FLAG_READ, NULL, NULL, NULL, NULL);
1341
ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1344
codec_id = st->codec->codec_id;
1345
extradata_offset = FFMIN(track->codec_priv.size, 18);
1346
} else if (!strcmp(track->codec_id, "V_QUICKTIME")
1347
&& (track->codec_priv.size >= 86)
1348
&& (track->codec_priv.data != NULL)) {
1349
track->video.fourcc = AV_RL32(track->codec_priv.data);
1350
codec_id=ff_codec_get_id(codec_movvideo_tags, track->video.fourcc);
1351
} else if (codec_id == CODEC_ID_PCM_S16BE) {
1352
switch (track->audio.bitdepth) {
1353
case 8: codec_id = CODEC_ID_PCM_U8; break;
1354
case 24: codec_id = CODEC_ID_PCM_S24BE; break;
1355
case 32: codec_id = CODEC_ID_PCM_S32BE; break;
1357
} else if (codec_id == CODEC_ID_PCM_S16LE) {
1358
switch (track->audio.bitdepth) {
1359
case 8: codec_id = CODEC_ID_PCM_U8; break;
1360
case 24: codec_id = CODEC_ID_PCM_S24LE; break;
1361
case 32: codec_id = CODEC_ID_PCM_S32LE; break;
1363
} else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1364
codec_id = CODEC_ID_PCM_F64LE;
1365
} else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1366
int profile = matroska_aac_profile(track->codec_id);
1367
int sri = matroska_aac_sri(track->audio.samplerate);
1368
extradata = av_malloc(5);
1369
if (extradata == NULL)
1370
return AVERROR(ENOMEM);
1371
extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1372
extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1373
if (strstr(track->codec_id, "SBR")) {
1374
sri = matroska_aac_sri(track->audio.out_samplerate);
1375
extradata[2] = 0x56;
1376
extradata[3] = 0xE5;
1377
extradata[4] = 0x80 | (sri<<3);
1381
} else if (codec_id == CODEC_ID_TTA) {
1382
extradata_size = 30;
1383
extradata = av_mallocz(extradata_size);
1384
if (extradata == NULL)
1385
return AVERROR(ENOMEM);
1386
ffio_init_context(&b, extradata, extradata_size, 1,
1387
NULL, NULL, NULL, NULL);
1388
avio_write(&b, "TTA1", 4);
1390
avio_wl16(&b, track->audio.channels);
1391
avio_wl16(&b, track->audio.bitdepth);
1392
avio_wl32(&b, track->audio.out_samplerate);
1393
avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1394
} else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1395
codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1396
extradata_offset = 26;
1397
} else if (codec_id == CODEC_ID_RA_144) {
1398
track->audio.out_samplerate = 8000;
1399
track->audio.channels = 1;
1400
} else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1401
codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) {
1403
ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
1404
0, NULL, NULL, NULL, NULL);
1406
flavor = avio_rb16(&b);
1407
track->audio.coded_framesize = avio_rb32(&b);
1409
track->audio.sub_packet_h = avio_rb16(&b);
1410
track->audio.frame_size = avio_rb16(&b);
1411
track->audio.sub_packet_size = avio_rb16(&b);
1412
track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1413
if (codec_id == CODEC_ID_RA_288) {
1414
st->codec->block_align = track->audio.coded_framesize;
1415
track->codec_priv.size = 0;
1417
if (codec_id == CODEC_ID_SIPR && flavor < 4) {
1418
const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1419
track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1420
st->codec->bit_rate = sipr_bit_rate[flavor];
1422
st->codec->block_align = track->audio.sub_packet_size;
1423
extradata_offset = 78;
1426
track->codec_priv.size -= extradata_offset;
1428
if (codec_id == CODEC_ID_NONE)
1429
av_log(matroska->ctx, AV_LOG_INFO,
1430
"Unknown/unsupported CodecID %s.\n", track->codec_id);
1432
if (track->time_scale < 0.01)
1433
track->time_scale = 1.0;
1434
av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1436
st->codec->codec_id = codec_id;
1438
if (strcmp(track->language, "und"))
1439
av_dict_set(&st->metadata, "language", track->language, 0);
1440
av_dict_set(&st->metadata, "title", track->name, 0);
1442
if (track->flag_default)
1443
st->disposition |= AV_DISPOSITION_DEFAULT;
1444
if (track->flag_forced)
1445
st->disposition |= AV_DISPOSITION_FORCED;
1447
if (track->default_duration)
1448
av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
1449
track->default_duration, 1000000000, 30000);
1451
if (!st->codec->extradata) {
1453
st->codec->extradata = extradata;
1454
st->codec->extradata_size = extradata_size;
1455
} else if(track->codec_priv.data && track->codec_priv.size > 0){
1456
st->codec->extradata = av_mallocz(track->codec_priv.size +
1457
FF_INPUT_BUFFER_PADDING_SIZE);
1458
if(st->codec->extradata == NULL)
1459
return AVERROR(ENOMEM);
1460
st->codec->extradata_size = track->codec_priv.size;
1461
memcpy(st->codec->extradata,
1462
track->codec_priv.data + extradata_offset,
1463
track->codec_priv.size);
1467
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1468
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1469
st->codec->codec_tag = track->video.fourcc;
1470
st->codec->width = track->video.pixel_width;
1471
st->codec->height = track->video.pixel_height;
1472
av_reduce(&st->sample_aspect_ratio.num,
1473
&st->sample_aspect_ratio.den,
1474
st->codec->height * track->video.display_width,
1475
st->codec-> width * track->video.display_height,
1477
if (st->codec->codec_id != CODEC_ID_H264)
1478
st->need_parsing = AVSTREAM_PARSE_HEADERS;
1479
if (track->default_duration)
1480
st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX);
1481
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1482
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1483
st->codec->sample_rate = track->audio.out_samplerate;
1484
st->codec->channels = track->audio.channels;
1485
if (st->codec->codec_id != CODEC_ID_AAC)
1486
st->need_parsing = AVSTREAM_PARSE_HEADERS;
1487
} else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1488
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1492
attachements = attachements_list->elem;
1493
for (j=0; j<attachements_list->nb_elem; j++) {
1494
if (!(attachements[j].filename && attachements[j].mime &&
1495
attachements[j].bin.data && attachements[j].bin.size > 0)) {
1496
av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1498
AVStream *st = av_new_stream(s, 0);
1501
av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
1502
st->codec->codec_id = CODEC_ID_NONE;
1503
st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1504
st->codec->extradata = av_malloc(attachements[j].bin.size);
1505
if(st->codec->extradata == NULL)
1507
st->codec->extradata_size = attachements[j].bin.size;
1508
memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1510
for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1511
if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1512
strlen(ff_mkv_mime_tags[i].str))) {
1513
st->codec->codec_id = ff_mkv_mime_tags[i].id;
1517
attachements[j].stream = st;
1521
chapters = chapters_list->elem;
1522
for (i=0; i<chapters_list->nb_elem; i++)
1523
if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1524
&& (max_start==0 || chapters[i].start > max_start)) {
1525
chapters[i].chapter =
1526
ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1527
chapters[i].start, chapters[i].end,
1529
av_dict_set(&chapters[i].chapter->metadata,
1530
"title", chapters[i].title, 0);
1531
max_start = chapters[i].start;
1534
index_list = &matroska->index;
1535
index = index_list->elem;
1536
if (index_list->nb_elem
1537
&& index[0].time > 100000000000000/matroska->time_scale) {
1538
av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1539
index_scale = matroska->time_scale;
1541
for (i=0; i<index_list->nb_elem; i++) {
1542
EbmlList *pos_list = &index[i].pos;
1543
MatroskaIndexPos *pos = pos_list->elem;
1544
for (j=0; j<pos_list->nb_elem; j++) {
1545
MatroskaTrack *track = matroska_find_track_by_num(matroska,
1547
if (track && track->stream)
1548
av_add_index_entry(track->stream,
1549
pos[j].pos + matroska->segment_start,
1550
index[i].time/index_scale, 0, 0,
1555
matroska_convert_tags(s);
1561
* Put one packet in an application-supplied AVPacket struct.
1562
* Returns 0 on success or -1 on failure.
1564
static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1567
if (matroska->num_packets > 0) {
1568
memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1569
av_free(matroska->packets[0]);
1570
if (matroska->num_packets > 1) {
1571
memmove(&matroska->packets[0], &matroska->packets[1],
1572
(matroska->num_packets - 1) * sizeof(AVPacket *));
1574
av_realloc(matroska->packets, (matroska->num_packets - 1) *
1575
sizeof(AVPacket *));
1577
av_freep(&matroska->packets);
1579
matroska->num_packets--;
1587
* Free all packets in our internal queue.
1589
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1591
if (matroska->packets) {
1593
for (n = 0; n < matroska->num_packets; n++) {
1594
av_free_packet(matroska->packets[n]);
1595
av_free(matroska->packets[n]);
1597
av_freep(&matroska->packets);
1598
matroska->num_packets = 0;
1602
static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1603
int size, int64_t pos, uint64_t cluster_time,
1604
uint64_t duration, int is_keyframe,
1605
int64_t cluster_pos)
1607
uint64_t timecode = AV_NOPTS_VALUE;
1608
MatroskaTrack *track;
1613
uint32_t *lace_size = NULL;
1614
int n, flags, laces = 0;
1617
if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
1618
av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1624
track = matroska_find_track_by_num(matroska, num);
1625
if (size <= 3 || !track || !track->stream) {
1626
av_log(matroska->ctx, AV_LOG_INFO,
1627
"Invalid stream %"PRIu64" or size %u\n", num, size);
1631
if (st->discard >= AVDISCARD_ALL)
1633
if (duration == AV_NOPTS_VALUE)
1634
duration = track->default_duration / matroska->time_scale;
1636
block_time = AV_RB16(data);
1640
if (is_keyframe == -1)
1641
is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
1643
if (cluster_time != (uint64_t)-1
1644
&& (block_time >= 0 || cluster_time >= -block_time)) {
1645
timecode = cluster_time + block_time;
1646
if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
1647
&& timecode < track->end_timecode)
1648
is_keyframe = 0; /* overlapping subtitles are not key frame */
1650
av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
1651
track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
1654
if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1655
if (!is_keyframe || timecode < matroska->skip_to_timecode)
1657
matroska->skip_to_keyframe = 0;
1660
switch ((flags & 0x06) >> 1) {
1661
case 0x0: /* no lacing */
1663
lace_size = av_mallocz(sizeof(int));
1664
lace_size[0] = size;
1667
case 0x1: /* Xiph lacing */
1668
case 0x2: /* fixed-size lacing */
1669
case 0x3: /* EBML lacing */
1670
assert(size>0); // size <=3 is checked before size-=3 above
1671
laces = (*data) + 1;
1674
lace_size = av_mallocz(laces * sizeof(int));
1676
switch ((flags & 0x06) >> 1) {
1677
case 0x1: /* Xiph lacing */ {
1680
for (n = 0; res == 0 && n < laces - 1; n++) {
1687
lace_size[n] += temp;
1693
total += lace_size[n];
1695
lace_size[n] = size - total;
1699
case 0x2: /* fixed-size lacing */
1700
for (n = 0; n < laces; n++)
1701
lace_size[n] = size / laces;
1704
case 0x3: /* EBML lacing */ {
1706
n = matroska_ebmlnum_uint(matroska, data, size, &num);
1708
av_log(matroska->ctx, AV_LOG_INFO,
1709
"EBML block data error\n");
1714
total = lace_size[0] = num;
1715
for (n = 1; res == 0 && n < laces - 1; n++) {
1718
r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1720
av_log(matroska->ctx, AV_LOG_INFO,
1721
"EBML block data error\n");
1726
lace_size[n] = lace_size[n - 1] + snum;
1727
total += lace_size[n];
1729
lace_size[n] = size - total;
1737
for (n = 0; n < laces; n++) {
1738
if ((st->codec->codec_id == CODEC_ID_RA_288 ||
1739
st->codec->codec_id == CODEC_ID_COOK ||
1740
st->codec->codec_id == CODEC_ID_SIPR ||
1741
st->codec->codec_id == CODEC_ID_ATRAC3) &&
1742
st->codec->block_align && track->audio.sub_packet_size) {
1743
int a = st->codec->block_align;
1744
int sps = track->audio.sub_packet_size;
1745
int cfs = track->audio.coded_framesize;
1746
int h = track->audio.sub_packet_h;
1747
int y = track->audio.sub_packet_cnt;
1748
int w = track->audio.frame_size;
1751
if (!track->audio.pkt_cnt) {
1752
if (track->audio.sub_packet_cnt == 0)
1753
track->audio.buf_timecode = timecode;
1754
if (st->codec->codec_id == CODEC_ID_RA_288)
1755
for (x=0; x<h/2; x++)
1756
memcpy(track->audio.buf+x*2*w+y*cfs,
1758
else if (st->codec->codec_id == CODEC_ID_SIPR)
1759
memcpy(track->audio.buf + y*w, data, w);
1761
for (x=0; x<w/sps; x++)
1762
memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1764
if (++track->audio.sub_packet_cnt >= h) {
1765
if (st->codec->codec_id == CODEC_ID_SIPR)
1766
ff_rm_reorder_sipr_data(track->audio.buf, h, w);
1767
track->audio.sub_packet_cnt = 0;
1768
track->audio.pkt_cnt = h*w / a;
1771
while (track->audio.pkt_cnt) {
1772
pkt = av_mallocz(sizeof(AVPacket));
1773
av_new_packet(pkt, a);
1774
memcpy(pkt->data, track->audio.buf
1775
+ a * (h*w / a - track->audio.pkt_cnt--), a);
1776
pkt->pts = track->audio.buf_timecode;
1777
track->audio.buf_timecode = AV_NOPTS_VALUE;
1779
pkt->stream_index = st->index;
1780
dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1783
MatroskaTrackEncoding *encodings = track->encodings.elem;
1784
int offset = 0, pkt_size = lace_size[n];
1785
uint8_t *pkt_data = data;
1787
if (pkt_size > size) {
1788
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
1792
if (encodings && encodings->scope & 1) {
1793
offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1798
pkt = av_mallocz(sizeof(AVPacket));
1799
/* XXX: prevent data copy... */
1800
if (av_new_packet(pkt, pkt_size+offset) < 0) {
1802
res = AVERROR(ENOMEM);
1806
memcpy (pkt->data, encodings->compression.settings.data, offset);
1807
memcpy (pkt->data+offset, pkt_data, pkt_size);
1809
if (pkt_data != data)
1813
pkt->flags = is_keyframe;
1814
pkt->stream_index = st->index;
1816
if (track->ms_compat)
1817
pkt->dts = timecode;
1819
pkt->pts = timecode;
1821
if (st->codec->codec_id == CODEC_ID_TEXT)
1822
pkt->convergence_duration = duration;
1823
else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
1824
pkt->duration = duration;
1826
if (st->codec->codec_id == CODEC_ID_SSA)
1827
matroska_fix_ass_packet(matroska, pkt, duration);
1829
if (matroska->prev_pkt &&
1830
timecode != AV_NOPTS_VALUE &&
1831
matroska->prev_pkt->pts == timecode &&
1832
matroska->prev_pkt->stream_index == st->index &&
1833
st->codec->codec_id == CODEC_ID_SSA)
1834
matroska_merge_packets(matroska->prev_pkt, pkt);
1836
dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1837
matroska->prev_pkt = pkt;
1841
if (timecode != AV_NOPTS_VALUE)
1842
timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
1843
data += lace_size[n];
1844
size -= lace_size[n];
1852
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
1854
MatroskaCluster cluster = { 0 };
1855
EbmlList *blocks_list;
1856
MatroskaBlock *blocks;
1858
int64_t pos = avio_tell(matroska->ctx->pb);
1859
matroska->prev_pkt = NULL;
1860
if (matroska->current_id)
1861
pos -= 4; /* sizeof the ID which was already read */
1862
res = ebml_parse(matroska, matroska_clusters, &cluster);
1863
blocks_list = &cluster.blocks;
1864
blocks = blocks_list->elem;
1865
for (i=0; i<blocks_list->nb_elem; i++)
1866
if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
1867
int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
1868
if (!blocks[i].non_simple)
1869
blocks[i].duration = AV_NOPTS_VALUE;
1870
res=matroska_parse_block(matroska,
1871
blocks[i].bin.data, blocks[i].bin.size,
1872
blocks[i].bin.pos, cluster.timecode,
1873
blocks[i].duration, is_keyframe,
1876
ebml_free(matroska_cluster, &cluster);
1877
if (res < 0) matroska->done = 1;
1881
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
1883
MatroskaDemuxContext *matroska = s->priv_data;
1885
while (matroska_deliver_packet(matroska, pkt)) {
1888
matroska_parse_cluster(matroska);
1894
static int matroska_read_seek(AVFormatContext *s, int stream_index,
1895
int64_t timestamp, int flags)
1897
MatroskaDemuxContext *matroska = s->priv_data;
1898
MatroskaTrack *tracks = matroska->tracks.elem;
1899
AVStream *st = s->streams[stream_index];
1900
int i, index, index_sub, index_min;
1902
if (!st->nb_index_entries)
1904
timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
1906
if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1907
avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
1908
matroska->current_id = 0;
1909
while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1910
matroska_clear_queue(matroska);
1911
if (matroska_parse_cluster(matroska) < 0)
1916
matroska_clear_queue(matroska);
1921
for (i=0; i < matroska->tracks.nb_elem; i++) {
1922
tracks[i].audio.pkt_cnt = 0;
1923
tracks[i].audio.sub_packet_cnt = 0;
1924
tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
1925
tracks[i].end_timecode = 0;
1926
if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
1927
&& !tracks[i].stream->discard != AVDISCARD_ALL) {
1928
index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
1930
&& st->index_entries[index_sub].pos < st->index_entries[index_min].pos
1931
&& st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
1932
index_min = index_sub;
1936
avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
1937
matroska->current_id = 0;
1938
matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
1939
matroska->skip_to_timecode = st->index_entries[index].timestamp;
1941
av_update_cur_dts(s, st, st->index_entries[index].timestamp);
1945
static int matroska_read_close(AVFormatContext *s)
1947
MatroskaDemuxContext *matroska = s->priv_data;
1948
MatroskaTrack *tracks = matroska->tracks.elem;
1951
matroska_clear_queue(matroska);
1953
for (n=0; n < matroska->tracks.nb_elem; n++)
1954
if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
1955
av_free(tracks[n].audio.buf);
1956
ebml_free(matroska_segment, matroska);
1961
AVInputFormat ff_matroska_demuxer = {
1963
NULL_IF_CONFIG_SMALL("Matroska/WebM file format"),
1964
sizeof(MatroskaDemuxContext),
1966
matroska_read_header,
1967
matroska_read_packet,
1968
matroska_read_close,
added
removed
.pc/post-0.7.1/0070-Fix-memory-re-allocation-in-matroskadec.c-related-to.patch/libavformat/matroskadec.c
