2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The FFmpeg Project
5 * This file is part of FFmpeg.
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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"
65 typedef const struct EbmlSyntax {
74 const struct EbmlSyntax *n;
94 uint64_t doctype_version;
100 } MatroskaTrackCompression;
105 MatroskaTrackCompression compression;
106 } MatroskaTrackEncoding;
110 uint64_t display_width;
111 uint64_t display_height;
112 uint64_t pixel_width;
113 uint64_t pixel_height;
115 uint64_t stereo_mode;
116 } MatroskaTrackVideo;
120 double out_samplerate;
124 /* real audio header (extracted from extradata) */
131 uint64_t buf_timecode;
133 } MatroskaTrackAudio;
138 } MatroskaTrackPlane;
141 EbmlList combine_planes;
142 } MatroskaTrackOperation;
153 uint64_t default_duration;
154 uint64_t flag_default;
155 uint64_t flag_forced;
156 MatroskaTrackVideo video;
157 MatroskaTrackAudio audio;
158 MatroskaTrackOperation operation;
162 int64_t end_timecode;
173 } MatroskaAttachement;
211 MatroskaTagTarget target;
226 AVFormatContext *ctx;
230 MatroskaLevel levels[EBML_MAX_DEPTH];
238 EbmlList attachments;
244 /* byte position of the segment inside the stream */
245 int64_t segment_start;
247 /* the packet queue */
254 /* What to skip before effectively reading a packet. */
255 int skip_to_keyframe;
256 uint64_t skip_to_timecode;
257 } MatroskaDemuxContext;
271 static EbmlSyntax ebml_header[] = {
272 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
273 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
274 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
275 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
276 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
277 { EBML_ID_EBMLVERSION, EBML_NONE },
278 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
282 static EbmlSyntax ebml_syntax[] = {
283 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
287 static EbmlSyntax matroska_info[] = {
288 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
289 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
290 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
291 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
292 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
293 { MATROSKA_ID_DATEUTC, EBML_NONE },
294 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
298 static EbmlSyntax matroska_track_video[] = {
299 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
300 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
301 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
302 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
303 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
304 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) },
305 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,stereo_mode) },
306 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
307 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
308 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
309 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
310 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
311 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
312 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
316 static EbmlSyntax matroska_track_audio[] = {
317 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
318 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
319 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
320 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
324 static EbmlSyntax matroska_track_encoding_compression[] = {
325 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
326 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
330 static EbmlSyntax matroska_track_encoding[] = {
331 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
332 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
333 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
334 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
338 static EbmlSyntax matroska_track_encodings[] = {
339 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
343 static EbmlSyntax matroska_track_plane[] = {
344 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
345 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
349 static EbmlSyntax matroska_track_combine_planes[] = {
350 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n=matroska_track_plane} },
354 static EbmlSyntax matroska_track_operation[] = {
355 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n=matroska_track_combine_planes} },
359 static EbmlSyntax matroska_track[] = {
360 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
361 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
362 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
363 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
364 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
365 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
366 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
367 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
368 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
369 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
370 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
371 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
372 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
373 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack,operation), {.n=matroska_track_operation} },
374 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
375 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
376 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
377 { MATROSKA_ID_CODECNAME, EBML_NONE },
378 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
379 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
380 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
381 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
382 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
383 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
387 static EbmlSyntax matroska_tracks[] = {
388 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
392 static EbmlSyntax matroska_attachment[] = {
393 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
394 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
395 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
396 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
397 { MATROSKA_ID_FILEDESC, EBML_NONE },
401 static EbmlSyntax matroska_attachments[] = {
402 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
406 static EbmlSyntax matroska_chapter_display[] = {
407 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
408 { MATROSKA_ID_CHAPLANG, EBML_NONE },
412 static EbmlSyntax matroska_chapter_entry[] = {
413 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
414 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
415 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
416 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
417 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
418 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
419 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
420 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
424 static EbmlSyntax matroska_chapter[] = {
425 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
426 { MATROSKA_ID_EDITIONUID, EBML_NONE },
427 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
428 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
429 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
433 static EbmlSyntax matroska_chapters[] = {
434 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
438 static EbmlSyntax matroska_index_pos[] = {
439 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
440 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
441 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
445 static EbmlSyntax matroska_index_entry[] = {
446 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
447 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
451 static EbmlSyntax matroska_index[] = {
452 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
456 static EbmlSyntax matroska_simpletag[] = {
457 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
458 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
459 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
460 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
461 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
462 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
466 static EbmlSyntax matroska_tagtargets[] = {
467 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
468 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
469 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
470 { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
471 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
475 static EbmlSyntax matroska_tag[] = {
476 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
477 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
481 static EbmlSyntax matroska_tags[] = {
482 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
486 static EbmlSyntax matroska_seekhead_entry[] = {
487 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
488 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
492 static EbmlSyntax matroska_seekhead[] = {
493 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
497 static EbmlSyntax matroska_segment[] = {
498 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
499 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
500 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
501 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
502 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
503 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
504 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
505 { MATROSKA_ID_CLUSTER, EBML_STOP },
509 static EbmlSyntax matroska_segments[] = {
510 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
514 static EbmlSyntax matroska_blockgroup[] = {
515 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
516 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
517 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration) },
518 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
519 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
523 static EbmlSyntax matroska_cluster[] = {
524 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
525 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
526 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
527 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
528 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
532 static EbmlSyntax matroska_clusters[] = {
533 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
534 { MATROSKA_ID_INFO, EBML_NONE },
535 { MATROSKA_ID_CUES, EBML_NONE },
536 { MATROSKA_ID_TAGS, EBML_NONE },
537 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
541 static const char *matroska_doctypes[] = { "matroska", "webm" };
544 * Return: Whether we reached the end of a level in the hierarchy or not.
546 static int ebml_level_end(MatroskaDemuxContext *matroska)
548 AVIOContext *pb = matroska->ctx->pb;
549 int64_t pos = avio_tell(pb);
551 if (matroska->num_levels > 0) {
552 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
553 if (pos - level->start >= level->length || matroska->current_id) {
554 matroska->num_levels--;
562 * Read: an "EBML number", which is defined as a variable-length
563 * array of bytes. The first byte indicates the length by giving a
564 * number of 0-bits followed by a one. The position of the first
565 * "one" bit inside the first byte indicates the length of this
567 * Returns: number of bytes read, < 0 on error
569 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
570 int max_size, uint64_t *number)
575 /* The first byte tells us the length in bytes - avio_r8() can normally
576 * return 0, but since that's not a valid first ebmlID byte, we can
577 * use it safely here to catch EOS. */
578 if (!(total = avio_r8(pb))) {
579 /* we might encounter EOS here */
581 int64_t pos = avio_tell(pb);
582 av_log(matroska->ctx, AV_LOG_ERROR,
583 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
586 return AVERROR(EIO); /* EOS or actual I/O error */
589 /* get the length of the EBML number */
590 read = 8 - ff_log2_tab[total];
591 if (read > max_size) {
592 int64_t pos = avio_tell(pb) - 1;
593 av_log(matroska->ctx, AV_LOG_ERROR,
594 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
595 (uint8_t) total, pos, pos);
596 return AVERROR_INVALIDDATA;
599 /* read out length */
600 total ^= 1 << ff_log2_tab[total];
602 total = (total << 8) | avio_r8(pb);
610 * Read a EBML length value.
611 * This needs special handling for the "unknown length" case which has multiple
614 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
617 int res = ebml_read_num(matroska, pb, 8, number);
618 if (res > 0 && *number + 1 == 1ULL << (7 * res))
619 *number = 0xffffffffffffffULL;
624 * Read the next element as an unsigned int.
625 * 0 is success, < 0 is failure.
627 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
632 return AVERROR_INVALIDDATA;
634 /* big-endian ordering; build up number */
637 *num = (*num << 8) | avio_r8(pb);
643 * Read the next element as a float.
644 * 0 is success, < 0 is failure.
646 static int ebml_read_float(AVIOContext *pb, int size, double *num)
650 } else if (size == 4) {
651 *num= av_int2flt(avio_rb32(pb));
653 *num= av_int2dbl(avio_rb64(pb));
655 return AVERROR_INVALIDDATA;
661 * Read the next element as an ASCII string.
662 * 0 is success, < 0 is failure.
664 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
667 /* EBML strings are usually not 0-terminated, so we allocate one
668 * byte more, read the string and NULL-terminate it ourselves. */
669 if (!(*str = av_malloc(size + 1)))
670 return AVERROR(ENOMEM);
671 if (avio_read(pb, (uint8_t *) *str, size) != size) {
681 * Read the next element as binary data.
682 * 0 is success, < 0 is failure.
684 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
687 if (!(bin->data = av_malloc(length)))
688 return AVERROR(ENOMEM);
691 bin->pos = avio_tell(pb);
692 if (avio_read(pb, bin->data, length) != length) {
693 av_freep(&bin->data);
701 * Read the next element, but only the header. The contents
702 * are supposed to be sub-elements which can be read separately.
703 * 0 is success, < 0 is failure.
705 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
707 AVIOContext *pb = matroska->ctx->pb;
708 MatroskaLevel *level;
710 if (matroska->num_levels >= EBML_MAX_DEPTH) {
711 av_log(matroska->ctx, AV_LOG_ERROR,
712 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
713 return AVERROR(ENOSYS);
716 level = &matroska->levels[matroska->num_levels++];
717 level->start = avio_tell(pb);
718 level->length = length;
724 * Read signed/unsigned "EBML" numbers.
725 * Return: number of bytes processed, < 0 on error
727 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
728 uint8_t *data, uint32_t size, uint64_t *num)
731 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
732 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
736 * Same as above, but signed.
738 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
739 uint8_t *data, uint32_t size, int64_t *num)
744 /* read as unsigned number first */
745 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
748 /* make signed (weird way) */
749 *num = unum - ((1LL << (7*res - 1)) - 1);
754 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
755 EbmlSyntax *syntax, void *data);
757 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
758 uint32_t id, void *data)
761 for (i=0; syntax[i].id; i++)
762 if (id == syntax[i].id)
764 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
765 matroska->num_levels > 0 &&
766 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
767 return 0; // we reached the end of an unknown size cluster
768 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32)
769 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
770 return ebml_parse_elem(matroska, &syntax[i], data);
773 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
776 if (!matroska->current_id) {
778 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
781 matroska->current_id = id | 1 << 7*res;
783 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
786 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
791 for (i=0; syntax[i].id; i++)
792 switch (syntax[i].type) {
794 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
797 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
801 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
805 while (!res && !ebml_level_end(matroska))
806 res = ebml_parse(matroska, syntax, data);
811 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
812 EbmlSyntax *syntax, void *data)
814 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
817 // max. 16 MB for strings
818 [EBML_STR] = 0x1000000,
819 [EBML_UTF8] = 0x1000000,
820 // max. 256 MB for binary data
821 [EBML_BIN] = 0x10000000,
822 // no limits for anything else
824 AVIOContext *pb = matroska->ctx->pb;
825 uint32_t id = syntax->id;
829 data = (char *)data + syntax->data_offset;
830 if (syntax->list_elem_size) {
831 EbmlList *list = data;
832 list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
833 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
834 memset(data, 0, syntax->list_elem_size);
838 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
839 matroska->current_id = 0;
840 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
842 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
843 av_log(matroska->ctx, AV_LOG_ERROR,
844 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
845 length, max_lengths[syntax->type], syntax->type);
846 return AVERROR_INVALIDDATA;
850 switch (syntax->type) {
851 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
852 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
854 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
855 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
856 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
858 if (id == MATROSKA_ID_SEGMENT)
859 matroska->segment_start = avio_tell(matroska->ctx->pb);
860 return ebml_parse_nest(matroska, syntax->def.n, data);
861 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
862 case EBML_STOP: return 1;
863 default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
865 if (res == AVERROR_INVALIDDATA)
866 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
867 else if (res == AVERROR(EIO))
868 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
872 static void ebml_free(EbmlSyntax *syntax, void *data)
875 for (i=0; syntax[i].id; i++) {
876 void *data_off = (char *)data + syntax[i].data_offset;
877 switch (syntax[i].type) {
879 case EBML_UTF8: av_freep(data_off); break;
880 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
882 if (syntax[i].list_elem_size) {
883 EbmlList *list = data_off;
884 char *ptr = list->elem;
885 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
886 ebml_free(syntax[i].def.n, ptr);
889 ebml_free(syntax[i].def.n, data_off);
899 static int matroska_probe(AVProbeData *p)
902 int len_mask = 0x80, size = 1, n = 1, i;
905 if (AV_RB32(p->buf) != EBML_ID_HEADER)
908 /* length of header */
910 while (size <= 8 && !(total & len_mask)) {
916 total &= (len_mask - 1);
918 total = (total << 8) | p->buf[4 + n++];
920 /* Does the probe data contain the whole header? */
921 if (p->buf_size < 4 + size + total)
924 /* The header should contain a known document type. For now,
925 * we don't parse the whole header but simply check for the
926 * availability of that array of characters inside the header.
927 * Not fully fool-proof, but good enough. */
928 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
929 int probelen = strlen(matroska_doctypes[i]);
930 for (n = 4+size; n <= 4+size+total-probelen; n++)
931 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
932 return AVPROBE_SCORE_MAX;
935 // probably valid EBML header but no recognized doctype
936 return AVPROBE_SCORE_MAX/2;
939 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
942 MatroskaTrack *tracks = matroska->tracks.elem;
945 for (i=0; i < matroska->tracks.nb_elem; i++)
946 if (tracks[i].num == num)
949 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
953 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
954 MatroskaTrack *track)
956 MatroskaTrackEncoding *encodings = track->encodings.elem;
957 uint8_t* data = *buf;
958 int isize = *buf_size;
959 uint8_t* pkt_data = NULL;
960 int pkt_size = isize;
964 if (pkt_size >= 10000000)
967 switch (encodings[0].compression.algo) {
968 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
969 return encodings[0].compression.settings.size;
970 case MATROSKA_TRACK_ENCODING_COMP_LZO:
972 olen = pkt_size *= 3;
973 pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
974 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
975 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
981 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
982 z_stream zstream = {0};
983 if (inflateInit(&zstream) != Z_OK)
985 zstream.next_in = data;
986 zstream.avail_in = isize;
989 pkt_data = av_realloc(pkt_data, pkt_size);
990 zstream.avail_out = pkt_size - zstream.total_out;
991 zstream.next_out = pkt_data + zstream.total_out;
992 result = inflate(&zstream, Z_NO_FLUSH);
993 } while (result==Z_OK && pkt_size<10000000);
994 pkt_size = zstream.total_out;
995 inflateEnd(&zstream);
996 if (result != Z_STREAM_END)
1002 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
1003 bz_stream bzstream = {0};
1004 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1006 bzstream.next_in = data;
1007 bzstream.avail_in = isize;
1010 pkt_data = av_realloc(pkt_data, pkt_size);
1011 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1012 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1013 result = BZ2_bzDecompress(&bzstream);
1014 } while (result==BZ_OK && pkt_size<10000000);
1015 pkt_size = bzstream.total_out_lo32;
1016 BZ2_bzDecompressEnd(&bzstream);
1017 if (result != BZ_STREAM_END)
1027 *buf_size = pkt_size;
1034 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1035 AVPacket *pkt, uint64_t display_duration)
1037 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
1038 for (; *ptr!=',' && ptr<end-1; ptr++);
1042 for (; *ptr!=',' && ptr<end-1; ptr++);
1044 int64_t end_pts = pkt->pts + display_duration;
1045 int sc = matroska->time_scale * pkt->pts / 10000000;
1046 int ec = matroska->time_scale * end_pts / 10000000;
1047 int sh, sm, ss, eh, em, es, len;
1048 sh = sc/360000; sc -= 360000*sh;
1049 sm = sc/ 6000; sc -= 6000*sm;
1050 ss = sc/ 100; sc -= 100*ss;
1051 eh = ec/360000; ec -= 360000*eh;
1052 em = ec/ 6000; ec -= 6000*em;
1053 es = ec/ 100; ec -= 100*es;
1055 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1056 if (!(line = av_malloc(len)))
1058 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1059 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1062 pkt->size = strlen(line);
1066 static void matroska_merge_packets(AVPacket *out, AVPacket *in)
1068 out->data = av_realloc(out->data, out->size+in->size);
1069 memcpy(out->data+out->size, in->data, in->size);
1070 out->size += in->size;
1071 av_destruct_packet(in);
1075 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1076 AVMetadata **metadata, char *prefix)
1078 MatroskaTag *tags = list->elem;
1082 for (i=0; i < list->nb_elem; i++) {
1083 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1085 if (!tags[i].name) {
1086 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1089 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1090 else av_strlcpy(key, tags[i].name, sizeof(key));
1091 if (tags[i].def || !lang) {
1092 av_metadata_set2(metadata, key, tags[i].string, 0);
1093 if (tags[i].sub.nb_elem)
1094 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1097 av_strlcat(key, "-", sizeof(key));
1098 av_strlcat(key, lang, sizeof(key));
1099 av_metadata_set2(metadata, key, tags[i].string, 0);
1100 if (tags[i].sub.nb_elem)
1101 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1104 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1107 static void matroska_convert_tags(AVFormatContext *s)
1109 MatroskaDemuxContext *matroska = s->priv_data;
1110 MatroskaTags *tags = matroska->tags.elem;
1113 for (i=0; i < matroska->tags.nb_elem; i++) {
1114 if (tags[i].target.attachuid) {
1115 MatroskaAttachement *attachment = matroska->attachments.elem;
1116 for (j=0; j<matroska->attachments.nb_elem; j++)
1117 if (attachment[j].uid == tags[i].target.attachuid
1118 && attachment[j].stream)
1119 matroska_convert_tag(s, &tags[i].tag,
1120 &attachment[j].stream->metadata, NULL);
1121 } else if (tags[i].target.chapteruid) {
1122 MatroskaChapter *chapter = matroska->chapters.elem;
1123 for (j=0; j<matroska->chapters.nb_elem; j++)
1124 if (chapter[j].uid == tags[i].target.chapteruid
1125 && chapter[j].chapter)
1126 matroska_convert_tag(s, &tags[i].tag,
1127 &chapter[j].chapter->metadata, NULL);
1128 } else if (tags[i].target.trackuid) {
1129 MatroskaTrack *track = matroska->tracks.elem;
1130 for (j=0; j<matroska->tracks.nb_elem; j++)
1131 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1132 matroska_convert_tag(s, &tags[i].tag,
1133 &track[j].stream->metadata, NULL);
1135 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1136 tags[i].target.type);
1141 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1143 EbmlList *seekhead_list = &matroska->seekhead;
1144 MatroskaSeekhead *seekhead = seekhead_list->elem;
1145 uint32_t level_up = matroska->level_up;
1146 int64_t before_pos = avio_tell(matroska->ctx->pb);
1147 uint32_t saved_id = matroska->current_id;
1148 MatroskaLevel level;
1151 // we should not do any seeking in the streaming case
1152 if (!matroska->ctx->pb->seekable ||
1153 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1156 for (i=0; i<seekhead_list->nb_elem; i++) {
1157 int64_t offset = seekhead[i].pos + matroska->segment_start;
1159 if (seekhead[i].pos <= before_pos
1160 || seekhead[i].id == MATROSKA_ID_SEEKHEAD
1161 || seekhead[i].id == MATROSKA_ID_CLUSTER)
1165 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) != offset)
1168 /* We don't want to lose our seekhead level, so we add
1169 * a dummy. This is a crude hack. */
1170 if (matroska->num_levels == EBML_MAX_DEPTH) {
1171 av_log(matroska->ctx, AV_LOG_INFO,
1172 "Max EBML element depth (%d) reached, "
1173 "cannot parse further.\n", EBML_MAX_DEPTH);
1178 level.length = (uint64_t)-1;
1179 matroska->levels[matroska->num_levels] = level;
1180 matroska->num_levels++;
1181 matroska->current_id = 0;
1183 ebml_parse(matroska, matroska_segment, matroska);
1185 /* remove dummy level */
1186 while (matroska->num_levels) {
1187 uint64_t length = matroska->levels[--matroska->num_levels].length;
1188 if (length == (uint64_t)-1)
1194 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1195 matroska->level_up = level_up;
1196 matroska->current_id = saved_id;
1199 static int matroska_aac_profile(char *codec_id)
1201 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1204 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1205 if (strstr(codec_id, aac_profiles[profile]))
1210 static int matroska_aac_sri(int samplerate)
1214 for (sri=0; sri<FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++)
1215 if (ff_mpeg4audio_sample_rates[sri] == samplerate)
1220 static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
1222 MatroskaDemuxContext *matroska = s->priv_data;
1223 EbmlList *attachements_list = &matroska->attachments;
1224 MatroskaAttachement *attachements;
1225 EbmlList *chapters_list = &matroska->chapters;
1226 MatroskaChapter *chapters;
1227 MatroskaTrack *tracks;
1228 EbmlList *index_list;
1229 MatroskaIndex *index;
1230 int index_scale = 1;
1231 uint64_t max_start = 0;
1238 /* First read the EBML header. */
1239 if (ebml_parse(matroska, ebml_syntax, &ebml)
1240 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1241 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 3) {
1242 av_log(matroska->ctx, AV_LOG_ERROR,
1243 "EBML header using unsupported features\n"
1244 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1245 ebml.version, ebml.doctype, ebml.doctype_version);
1246 ebml_free(ebml_syntax, &ebml);
1247 return AVERROR_PATCHWELCOME;
1248 } else if (ebml.doctype_version == 3) {
1249 av_log(matroska->ctx, AV_LOG_WARNING,
1250 "EBML header using unsupported features\n"
1251 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1252 ebml.version, ebml.doctype, ebml.doctype_version);
1254 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1255 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1257 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1258 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1260 ebml_free(ebml_syntax, &ebml);
1262 /* The next thing is a segment. */
1263 if ((res = ebml_parse(matroska, matroska_segments, matroska)) < 0)
1265 matroska_execute_seekhead(matroska);
1267 if (!matroska->time_scale)
1268 matroska->time_scale = 1000000;
1269 if (matroska->duration)
1270 matroska->ctx->duration = matroska->duration * matroska->time_scale
1271 * 1000 / AV_TIME_BASE;
1272 av_metadata_set2(&s->metadata, "title", matroska->title, 0);
1274 tracks = matroska->tracks.elem;
1275 for (i=0; i < matroska->tracks.nb_elem; i++) {
1276 MatroskaTrack *track = &tracks[i];
1277 enum CodecID codec_id = CODEC_ID_NONE;
1278 EbmlList *encodings_list = &tracks->encodings;
1279 MatroskaTrackEncoding *encodings = encodings_list->elem;
1280 uint8_t *extradata = NULL;
1281 int extradata_size = 0;
1282 int extradata_offset = 0;
1285 /* Apply some sanity checks. */
1286 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1287 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1288 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1289 av_log(matroska->ctx, AV_LOG_INFO,
1290 "Unknown or unsupported track type %"PRIu64"\n",
1294 if (track->codec_id == NULL)
1297 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1298 if (!track->default_duration)
1299 track->default_duration = 1000000000/track->video.frame_rate;
1300 if (!track->video.display_width)
1301 track->video.display_width = track->video.pixel_width;
1302 if (!track->video.display_height)
1303 track->video.display_height = track->video.pixel_height;
1304 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1305 if (!track->audio.out_samplerate)
1306 track->audio.out_samplerate = track->audio.samplerate;
1308 if (encodings_list->nb_elem > 1) {
1309 av_log(matroska->ctx, AV_LOG_ERROR,
1310 "Multiple combined encodings no supported");
1311 } else if (encodings_list->nb_elem == 1) {
1312 if (encodings[0].type ||
1313 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1315 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1318 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1320 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1321 encodings[0].scope = 0;
1322 av_log(matroska->ctx, AV_LOG_ERROR,
1323 "Unsupported encoding type");
1324 } else if (track->codec_priv.size && encodings[0].scope&2) {
1325 uint8_t *codec_priv = track->codec_priv.data;
1326 int offset = matroska_decode_buffer(&track->codec_priv.data,
1327 &track->codec_priv.size,
1330 track->codec_priv.data = NULL;
1331 track->codec_priv.size = 0;
1332 av_log(matroska->ctx, AV_LOG_ERROR,
1333 "Failed to decode codec private data\n");
1334 } else if (offset > 0) {
1335 track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1336 memcpy(track->codec_priv.data,
1337 encodings[0].compression.settings.data, offset);
1338 memcpy(track->codec_priv.data+offset, codec_priv,
1339 track->codec_priv.size);
1340 track->codec_priv.size += offset;
1342 if (codec_priv != track->codec_priv.data)
1343 av_free(codec_priv);
1347 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1348 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1349 strlen(ff_mkv_codec_tags[j].str))){
1350 codec_id= ff_mkv_codec_tags[j].id;
1355 st = track->stream = av_new_stream(s, 0);
1357 return AVERROR(ENOMEM);
1359 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1360 && track->codec_priv.size >= 40
1361 && track->codec_priv.data != NULL) {
1362 track->ms_compat = 1;
1363 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1364 codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc);
1365 extradata_offset = 40;
1366 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1367 && track->codec_priv.size >= 14
1368 && track->codec_priv.data != NULL) {
1370 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1371 AVIO_FLAG_READ, NULL, NULL, NULL, NULL);
1372 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1375 codec_id = st->codec->codec_id;
1376 extradata_offset = FFMIN(track->codec_priv.size, 18);
1377 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1378 && (track->codec_priv.size >= 86)
1379 && (track->codec_priv.data != NULL)) {
1380 track->video.fourcc = AV_RL32(track->codec_priv.data);
1381 codec_id=ff_codec_get_id(codec_movvideo_tags, track->video.fourcc);
1382 } else if (codec_id == CODEC_ID_PCM_S16BE) {
1383 switch (track->audio.bitdepth) {
1384 case 8: codec_id = CODEC_ID_PCM_U8; break;
1385 case 24: codec_id = CODEC_ID_PCM_S24BE; break;
1386 case 32: codec_id = CODEC_ID_PCM_S32BE; break;
1388 } else if (codec_id == CODEC_ID_PCM_S16LE) {
1389 switch (track->audio.bitdepth) {
1390 case 8: codec_id = CODEC_ID_PCM_U8; break;
1391 case 24: codec_id = CODEC_ID_PCM_S24LE; break;
1392 case 32: codec_id = CODEC_ID_PCM_S32LE; break;
1394 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1395 codec_id = CODEC_ID_PCM_F64LE;
1396 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1397 int profile = matroska_aac_profile(track->codec_id);
1398 int sri = matroska_aac_sri(track->audio.samplerate);
1399 extradata = av_malloc(5);
1400 if (extradata == NULL)
1401 return AVERROR(ENOMEM);
1402 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1403 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1404 if (strstr(track->codec_id, "SBR")) {
1405 sri = matroska_aac_sri(track->audio.out_samplerate);
1406 extradata[2] = 0x56;
1407 extradata[3] = 0xE5;
1408 extradata[4] = 0x80 | (sri<<3);
1412 } else if (codec_id == CODEC_ID_TTA) {
1413 extradata_size = 30;
1414 extradata = av_mallocz(extradata_size);
1415 if (extradata == NULL)
1416 return AVERROR(ENOMEM);
1417 ffio_init_context(&b, extradata, extradata_size, 1,
1418 NULL, NULL, NULL, NULL);
1419 avio_write(&b, "TTA1", 4);
1421 avio_wl16(&b, track->audio.channels);
1422 avio_wl16(&b, track->audio.bitdepth);
1423 avio_wl32(&b, track->audio.out_samplerate);
1424 avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1425 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1426 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1427 extradata_offset = 26;
1428 } else if (codec_id == CODEC_ID_RA_144) {
1429 track->audio.out_samplerate = 8000;
1430 track->audio.channels = 1;
1431 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1432 codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) {
1434 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
1435 0, NULL, NULL, NULL, NULL);
1437 flavor = avio_rb16(&b);
1438 track->audio.coded_framesize = avio_rb32(&b);
1440 track->audio.sub_packet_h = avio_rb16(&b);
1441 track->audio.frame_size = avio_rb16(&b);
1442 track->audio.sub_packet_size = avio_rb16(&b);
1443 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1444 if (codec_id == CODEC_ID_RA_288) {
1445 st->codec->block_align = track->audio.coded_framesize;
1446 track->codec_priv.size = 0;
1448 if (codec_id == CODEC_ID_SIPR && flavor < 4) {
1449 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1450 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1451 st->codec->bit_rate = sipr_bit_rate[flavor];
1453 st->codec->block_align = track->audio.sub_packet_size;
1454 extradata_offset = 78;
1457 track->codec_priv.size -= extradata_offset;
1459 if (codec_id == CODEC_ID_NONE)
1460 av_log(matroska->ctx, AV_LOG_INFO,
1461 "Unknown/unsupported CodecID %s.\n", track->codec_id);
1463 if (track->time_scale < 0.01)
1464 track->time_scale = 1.0;
1465 av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1467 st->codec->codec_id = codec_id;
1469 if (strcmp(track->language, "und"))
1470 av_metadata_set2(&st->metadata, "language", track->language, 0);
1471 av_metadata_set2(&st->metadata, "title", track->name, 0);
1473 if (track->flag_default)
1474 st->disposition |= AV_DISPOSITION_DEFAULT;
1475 if (track->flag_forced)
1476 st->disposition |= AV_DISPOSITION_FORCED;
1478 if (track->default_duration)
1479 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
1480 track->default_duration, 1000000000, 30000);
1482 if (!st->codec->extradata) {
1484 st->codec->extradata = extradata;
1485 st->codec->extradata_size = extradata_size;
1486 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1487 st->codec->extradata = av_mallocz(track->codec_priv.size +
1488 FF_INPUT_BUFFER_PADDING_SIZE);
1489 if(st->codec->extradata == NULL)
1490 return AVERROR(ENOMEM);
1491 st->codec->extradata_size = track->codec_priv.size;
1492 memcpy(st->codec->extradata,
1493 track->codec_priv.data + extradata_offset,
1494 track->codec_priv.size);
1498 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1499 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
1501 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1502 st->codec->codec_tag = track->video.fourcc;
1503 st->codec->width = track->video.pixel_width;
1504 st->codec->height = track->video.pixel_height;
1505 av_reduce(&st->sample_aspect_ratio.num,
1506 &st->sample_aspect_ratio.den,
1507 st->codec->height * track->video.display_width,
1508 st->codec-> width * track->video.display_height,
1510 if (st->codec->codec_id != CODEC_ID_H264)
1511 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1512 if (track->default_duration)
1513 st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX);
1515 /* export stereo mode flag as metadata tag */
1516 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREO_MODE_COUNT)
1517 av_metadata_set2(&st->metadata, "stereo_mode", matroska_video_stereo_mode[track->video.stereo_mode], 0);
1519 /* if we have virtual track, mark the real tracks */
1520 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
1522 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
1524 snprintf(buf, sizeof(buf), "%s_%d",
1525 matroska_video_stereo_plane[planes[j].type], i);
1526 for (k=0; k < matroska->tracks.nb_elem; k++)
1527 if (planes[j].uid == tracks[k].uid) {
1528 av_metadata_set2(&s->streams[k]->metadata,
1529 "stereo_mode", buf, 0);
1533 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1534 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1535 st->codec->sample_rate = track->audio.out_samplerate;
1536 st->codec->channels = track->audio.channels;
1537 if (st->codec->codec_id != CODEC_ID_AAC)
1538 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1539 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1540 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1544 attachements = attachements_list->elem;
1545 for (j=0; j<attachements_list->nb_elem; j++) {
1546 if (!(attachements[j].filename && attachements[j].mime &&
1547 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1548 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1550 AVStream *st = av_new_stream(s, 0);
1553 av_metadata_set2(&st->metadata, "filename",attachements[j].filename, 0);
1554 st->codec->codec_id = CODEC_ID_NONE;
1555 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1556 st->codec->extradata = av_malloc(attachements[j].bin.size);
1557 if(st->codec->extradata == NULL)
1559 st->codec->extradata_size = attachements[j].bin.size;
1560 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1562 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1563 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1564 strlen(ff_mkv_mime_tags[i].str))) {
1565 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1569 attachements[j].stream = st;
1573 chapters = chapters_list->elem;
1574 for (i=0; i<chapters_list->nb_elem; i++)
1575 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1576 && (max_start==0 || chapters[i].start > max_start)) {
1577 chapters[i].chapter =
1578 ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1579 chapters[i].start, chapters[i].end,
1581 av_metadata_set2(&chapters[i].chapter->metadata,
1582 "title", chapters[i].title, 0);
1583 max_start = chapters[i].start;
1586 index_list = &matroska->index;
1587 index = index_list->elem;
1588 if (index_list->nb_elem
1589 && index[0].time > 100000000000000/matroska->time_scale) {
1590 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1591 index_scale = matroska->time_scale;
1593 for (i=0; i<index_list->nb_elem; i++) {
1594 EbmlList *pos_list = &index[i].pos;
1595 MatroskaIndexPos *pos = pos_list->elem;
1596 for (j=0; j<pos_list->nb_elem; j++) {
1597 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1599 if (track && track->stream)
1600 av_add_index_entry(track->stream,
1601 pos[j].pos + matroska->segment_start,
1602 index[i].time/index_scale, 0, 0,
1607 matroska_convert_tags(s);
1613 * Put one packet in an application-supplied AVPacket struct.
1614 * Returns 0 on success or -1 on failure.
1616 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1619 if (matroska->num_packets > 0) {
1620 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1621 av_free(matroska->packets[0]);
1622 if (matroska->num_packets > 1) {
1623 memmove(&matroska->packets[0], &matroska->packets[1],
1624 (matroska->num_packets - 1) * sizeof(AVPacket *));
1626 av_realloc(matroska->packets, (matroska->num_packets - 1) *
1627 sizeof(AVPacket *));
1629 av_freep(&matroska->packets);
1631 matroska->num_packets--;
1639 * Free all packets in our internal queue.
1641 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1643 if (matroska->packets) {
1645 for (n = 0; n < matroska->num_packets; n++) {
1646 av_free_packet(matroska->packets[n]);
1647 av_free(matroska->packets[n]);
1649 av_freep(&matroska->packets);
1650 matroska->num_packets = 0;
1654 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1655 int size, int64_t pos, uint64_t cluster_time,
1656 uint64_t duration, int is_keyframe,
1657 int64_t cluster_pos)
1659 uint64_t timecode = AV_NOPTS_VALUE;
1660 MatroskaTrack *track;
1665 uint32_t *lace_size = NULL;
1666 int n, flags, laces = 0;
1669 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
1670 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1676 track = matroska_find_track_by_num(matroska, num);
1677 if (size <= 3 || !track || !track->stream) {
1678 av_log(matroska->ctx, AV_LOG_INFO,
1679 "Invalid stream %"PRIu64" or size %u\n", num, size);
1683 if (st->discard >= AVDISCARD_ALL)
1686 duration = track->default_duration / matroska->time_scale;
1688 block_time = AV_RB16(data);
1692 if (is_keyframe == -1)
1693 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
1695 if (cluster_time != (uint64_t)-1
1696 && (block_time >= 0 || cluster_time >= -block_time)) {
1697 timecode = cluster_time + block_time;
1698 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
1699 && timecode < track->end_timecode)
1700 is_keyframe = 0; /* overlapping subtitles are not key frame */
1702 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
1703 track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
1706 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1707 if (!is_keyframe || timecode < matroska->skip_to_timecode)
1709 matroska->skip_to_keyframe = 0;
1712 switch ((flags & 0x06) >> 1) {
1713 case 0x0: /* no lacing */
1715 lace_size = av_mallocz(sizeof(int));
1716 lace_size[0] = size;
1719 case 0x1: /* Xiph lacing */
1720 case 0x2: /* fixed-size lacing */
1721 case 0x3: /* EBML lacing */
1722 assert(size>0); // size <=3 is checked before size-=3 above
1723 laces = (*data) + 1;
1726 lace_size = av_mallocz(laces * sizeof(int));
1728 switch ((flags & 0x06) >> 1) {
1729 case 0x1: /* Xiph lacing */ {
1732 for (n = 0; res == 0 && n < laces - 1; n++) {
1739 lace_size[n] += temp;
1745 total += lace_size[n];
1747 lace_size[n] = size - total;
1751 case 0x2: /* fixed-size lacing */
1752 for (n = 0; n < laces; n++)
1753 lace_size[n] = size / laces;
1756 case 0x3: /* EBML lacing */ {
1758 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1760 av_log(matroska->ctx, AV_LOG_INFO,
1761 "EBML block data error\n");
1766 total = lace_size[0] = num;
1767 for (n = 1; res == 0 && n < laces - 1; n++) {
1770 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1772 av_log(matroska->ctx, AV_LOG_INFO,
1773 "EBML block data error\n");
1778 lace_size[n] = lace_size[n - 1] + snum;
1779 total += lace_size[n];
1781 lace_size[n] = size - total;
1789 for (n = 0; n < laces; n++) {
1790 if ((st->codec->codec_id == CODEC_ID_RA_288 ||
1791 st->codec->codec_id == CODEC_ID_COOK ||
1792 st->codec->codec_id == CODEC_ID_SIPR ||
1793 st->codec->codec_id == CODEC_ID_ATRAC3) &&
1794 st->codec->block_align && track->audio.sub_packet_size) {
1795 int a = st->codec->block_align;
1796 int sps = track->audio.sub_packet_size;
1797 int cfs = track->audio.coded_framesize;
1798 int h = track->audio.sub_packet_h;
1799 int y = track->audio.sub_packet_cnt;
1800 int w = track->audio.frame_size;
1803 if (!track->audio.pkt_cnt) {
1804 if (track->audio.sub_packet_cnt == 0)
1805 track->audio.buf_timecode = timecode;
1806 if (st->codec->codec_id == CODEC_ID_RA_288)
1807 for (x=0; x<h/2; x++)
1808 memcpy(track->audio.buf+x*2*w+y*cfs,
1810 else if (st->codec->codec_id == CODEC_ID_SIPR)
1811 memcpy(track->audio.buf + y*w, data, w);
1813 for (x=0; x<w/sps; x++)
1814 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1816 if (++track->audio.sub_packet_cnt >= h) {
1817 if (st->codec->codec_id == CODEC_ID_SIPR)
1818 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
1819 track->audio.sub_packet_cnt = 0;
1820 track->audio.pkt_cnt = h*w / a;
1823 while (track->audio.pkt_cnt) {
1824 pkt = av_mallocz(sizeof(AVPacket));
1825 av_new_packet(pkt, a);
1826 memcpy(pkt->data, track->audio.buf
1827 + a * (h*w / a - track->audio.pkt_cnt--), a);
1828 pkt->pts = track->audio.buf_timecode;
1829 track->audio.buf_timecode = AV_NOPTS_VALUE;
1831 pkt->stream_index = st->index;
1832 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1835 MatroskaTrackEncoding *encodings = track->encodings.elem;
1836 int offset = 0, pkt_size = lace_size[n];
1837 uint8_t *pkt_data = data;
1839 if (pkt_size > size) {
1840 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
1844 if (encodings && encodings->scope & 1) {
1845 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1850 pkt = av_mallocz(sizeof(AVPacket));
1851 /* XXX: prevent data copy... */
1852 if (av_new_packet(pkt, pkt_size+offset) < 0) {
1854 res = AVERROR(ENOMEM);
1858 memcpy (pkt->data, encodings->compression.settings.data, offset);
1859 memcpy (pkt->data+offset, pkt_data, pkt_size);
1861 if (pkt_data != data)
1865 pkt->flags = is_keyframe;
1866 pkt->stream_index = st->index;
1868 if (track->ms_compat)
1869 pkt->dts = timecode;
1871 pkt->pts = timecode;
1873 if (st->codec->codec_id == CODEC_ID_TEXT)
1874 pkt->convergence_duration = duration;
1875 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
1876 pkt->duration = duration;
1878 if (st->codec->codec_id == CODEC_ID_SSA)
1879 matroska_fix_ass_packet(matroska, pkt, duration);
1881 if (matroska->prev_pkt &&
1882 timecode != AV_NOPTS_VALUE &&
1883 matroska->prev_pkt->pts == timecode &&
1884 matroska->prev_pkt->stream_index == st->index &&
1885 st->codec->codec_id == CODEC_ID_SSA)
1886 matroska_merge_packets(matroska->prev_pkt, pkt);
1888 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1889 matroska->prev_pkt = pkt;
1893 if (timecode != AV_NOPTS_VALUE)
1894 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
1895 data += lace_size[n];
1896 size -= lace_size[n];
1904 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
1906 MatroskaCluster cluster = { 0 };
1907 EbmlList *blocks_list;
1908 MatroskaBlock *blocks;
1910 int64_t pos = avio_tell(matroska->ctx->pb);
1911 matroska->prev_pkt = NULL;
1912 if (matroska->current_id)
1913 pos -= 4; /* sizeof the ID which was already read */
1914 res = ebml_parse(matroska, matroska_clusters, &cluster);
1915 blocks_list = &cluster.blocks;
1916 blocks = blocks_list->elem;
1917 for (i=0; i<blocks_list->nb_elem; i++)
1918 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
1919 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
1920 res=matroska_parse_block(matroska,
1921 blocks[i].bin.data, blocks[i].bin.size,
1922 blocks[i].bin.pos, cluster.timecode,
1923 blocks[i].duration, is_keyframe,
1926 ebml_free(matroska_cluster, &cluster);
1927 if (res < 0) matroska->done = 1;
1931 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
1933 MatroskaDemuxContext *matroska = s->priv_data;
1935 while (matroska_deliver_packet(matroska, pkt)) {
1938 matroska_parse_cluster(matroska);
1944 static int matroska_read_seek(AVFormatContext *s, int stream_index,
1945 int64_t timestamp, int flags)
1947 MatroskaDemuxContext *matroska = s->priv_data;
1948 MatroskaTrack *tracks = matroska->tracks.elem;
1949 AVStream *st = s->streams[stream_index];
1950 int i, index, index_sub, index_min;
1952 if (!st->nb_index_entries)
1954 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
1956 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1957 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
1958 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1959 matroska_clear_queue(matroska);
1960 if (matroska_parse_cluster(matroska) < 0)
1965 matroska_clear_queue(matroska);
1970 for (i=0; i < matroska->tracks.nb_elem; i++) {
1971 tracks[i].audio.pkt_cnt = 0;
1972 tracks[i].audio.sub_packet_cnt = 0;
1973 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
1974 tracks[i].end_timecode = 0;
1975 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
1976 && !tracks[i].stream->discard != AVDISCARD_ALL) {
1977 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
1979 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
1980 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
1981 index_min = index_sub;
1985 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
1986 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
1987 matroska->skip_to_timecode = st->index_entries[index].timestamp;
1989 av_update_cur_dts(s, st, st->index_entries[index].timestamp);
1993 static int matroska_read_close(AVFormatContext *s)
1995 MatroskaDemuxContext *matroska = s->priv_data;
1996 MatroskaTrack *tracks = matroska->tracks.elem;
1999 matroska_clear_queue(matroska);
2001 for (n=0; n < matroska->tracks.nb_elem; n++)
2002 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2003 av_free(tracks[n].audio.buf);
2004 ebml_free(matroska_segment, matroska);
2009 AVInputFormat ff_matroska_demuxer = {
2011 NULL_IF_CONFIG_SMALL("Matroska/WebM file format"),
2012 sizeof(MatroskaDemuxContext),
2014 matroska_read_header,
2015 matroska_read_packet,
2016 matroska_read_close,