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 * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * @see 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.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 uint64_t stereo_mode;
117 } MatroskaTrackVideo;
121 double out_samplerate;
125 /* real audio header (extracted from extradata) */
132 uint64_t buf_timecode;
134 } MatroskaTrackAudio;
139 } MatroskaTrackPlane;
142 EbmlList combine_planes;
143 } MatroskaTrackOperation;
154 uint64_t default_duration;
155 uint64_t flag_default;
156 uint64_t flag_forced;
157 MatroskaTrackVideo video;
158 MatroskaTrackAudio audio;
159 MatroskaTrackOperation operation;
163 int64_t end_timecode;
174 } MatroskaAttachement;
212 MatroskaTagTarget target;
227 AVFormatContext *ctx;
231 MatroskaLevel levels[EBML_MAX_DEPTH];
240 EbmlList attachments;
246 /* byte position of the segment inside the stream */
247 int64_t segment_start;
249 /* the packet queue */
256 /* What to skip before effectively reading a packet. */
257 int skip_to_keyframe;
258 uint64_t skip_to_timecode;
260 /* File has a CUES element, but we defer parsing until it is needed. */
261 int cues_parsing_deferred;
262 } MatroskaDemuxContext;
276 static EbmlSyntax ebml_header[] = {
277 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
278 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
279 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
280 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
281 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
282 { EBML_ID_EBMLVERSION, EBML_NONE },
283 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
287 static EbmlSyntax ebml_syntax[] = {
288 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
292 static EbmlSyntax matroska_info[] = {
293 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
294 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
295 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
296 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
297 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
298 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext,date_utc) },
299 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
303 static EbmlSyntax matroska_track_video[] = {
304 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
305 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
306 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
307 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
308 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
309 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo,color_space) },
310 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,stereo_mode) },
311 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
312 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
313 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
314 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
315 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
316 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
317 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
321 static EbmlSyntax matroska_track_audio[] = {
322 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
323 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
324 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
325 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
329 static EbmlSyntax matroska_track_encoding_compression[] = {
330 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
331 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
335 static EbmlSyntax matroska_track_encoding[] = {
336 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
337 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
338 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
339 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
343 static EbmlSyntax matroska_track_encodings[] = {
344 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
348 static EbmlSyntax matroska_track_plane[] = {
349 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
350 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
354 static EbmlSyntax matroska_track_combine_planes[] = {
355 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n=matroska_track_plane} },
359 static EbmlSyntax matroska_track_operation[] = {
360 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n=matroska_track_combine_planes} },
364 static EbmlSyntax matroska_track[] = {
365 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
366 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
367 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
368 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
369 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
370 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
371 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
372 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
373 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
374 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
375 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
376 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
377 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
378 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack,operation), {.n=matroska_track_operation} },
379 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
380 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
381 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
382 { MATROSKA_ID_CODECNAME, EBML_NONE },
383 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
384 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
385 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
386 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
387 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
388 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
392 static EbmlSyntax matroska_tracks[] = {
393 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
397 static EbmlSyntax matroska_attachment[] = {
398 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
399 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
400 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
401 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
402 { MATROSKA_ID_FILEDESC, EBML_NONE },
406 static EbmlSyntax matroska_attachments[] = {
407 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
411 static EbmlSyntax matroska_chapter_display[] = {
412 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
413 { MATROSKA_ID_CHAPLANG, EBML_NONE },
417 static EbmlSyntax matroska_chapter_entry[] = {
418 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
419 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
420 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
421 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
422 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
423 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
424 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
425 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
429 static EbmlSyntax matroska_chapter[] = {
430 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
431 { MATROSKA_ID_EDITIONUID, EBML_NONE },
432 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
433 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
434 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
438 static EbmlSyntax matroska_chapters[] = {
439 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
443 static EbmlSyntax matroska_index_pos[] = {
444 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
445 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
446 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
450 static EbmlSyntax matroska_index_entry[] = {
451 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
452 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
456 static EbmlSyntax matroska_index[] = {
457 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
461 static EbmlSyntax matroska_simpletag[] = {
462 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
463 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
464 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
465 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
466 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
467 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
471 static EbmlSyntax matroska_tagtargets[] = {
472 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
473 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
474 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
475 { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
476 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
480 static EbmlSyntax matroska_tag[] = {
481 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
482 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
486 static EbmlSyntax matroska_tags[] = {
487 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
491 static EbmlSyntax matroska_seekhead_entry[] = {
492 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
493 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
497 static EbmlSyntax matroska_seekhead[] = {
498 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
502 static EbmlSyntax matroska_segment[] = {
503 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
504 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
505 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
506 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
507 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
508 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
509 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
510 { MATROSKA_ID_CLUSTER, EBML_STOP },
514 static EbmlSyntax matroska_segments[] = {
515 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
519 static EbmlSyntax matroska_blockgroup[] = {
520 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
521 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
522 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration) },
523 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
524 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
528 static EbmlSyntax matroska_cluster[] = {
529 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
530 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
531 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
532 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
533 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
537 static EbmlSyntax matroska_clusters[] = {
538 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
539 { MATROSKA_ID_INFO, EBML_NONE },
540 { MATROSKA_ID_CUES, EBML_NONE },
541 { MATROSKA_ID_TAGS, EBML_NONE },
542 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
546 static const char *const matroska_doctypes[] = { "matroska", "webm" };
548 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
550 AVIOContext *pb = matroska->ctx->pb;
552 matroska->current_id = 0;
553 matroska->num_levels = 0;
555 // seek to next position to resync from
556 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0 || avio_tell(pb) <= last_pos)
561 // try to find a toplevel element
562 while (!url_feof(pb)) {
563 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
564 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
565 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
566 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS)
568 matroska->current_id = id;
571 id = (id << 8) | avio_r8(pb);
579 * Return: Whether we reached the end of a level in the hierarchy or not.
581 static int ebml_level_end(MatroskaDemuxContext *matroska)
583 AVIOContext *pb = matroska->ctx->pb;
584 int64_t pos = avio_tell(pb);
586 if (matroska->num_levels > 0) {
587 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
588 if (pos - level->start >= level->length || matroska->current_id) {
589 matroska->num_levels--;
597 * Read: an "EBML number", which is defined as a variable-length
598 * array of bytes. The first byte indicates the length by giving a
599 * number of 0-bits followed by a one. The position of the first
600 * "one" bit inside the first byte indicates the length of this
602 * Returns: number of bytes read, < 0 on error
604 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
605 int max_size, uint64_t *number)
610 /* The first byte tells us the length in bytes - avio_r8() can normally
611 * return 0, but since that's not a valid first ebmlID byte, we can
612 * use it safely here to catch EOS. */
613 if (!(total = avio_r8(pb))) {
614 /* we might encounter EOS here */
616 int64_t pos = avio_tell(pb);
617 av_log(matroska->ctx, AV_LOG_ERROR,
618 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
621 return AVERROR(EIO); /* EOS or actual I/O error */
624 /* get the length of the EBML number */
625 read = 8 - ff_log2_tab[total];
626 if (read > max_size) {
627 int64_t pos = avio_tell(pb) - 1;
628 av_log(matroska->ctx, AV_LOG_ERROR,
629 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
630 (uint8_t) total, pos, pos);
631 return AVERROR_INVALIDDATA;
634 /* read out length */
635 total ^= 1 << ff_log2_tab[total];
637 total = (total << 8) | avio_r8(pb);
645 * Read a EBML length value.
646 * This needs special handling for the "unknown length" case which has multiple
649 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
652 int res = ebml_read_num(matroska, pb, 8, number);
653 if (res > 0 && *number + 1 == 1ULL << (7 * res))
654 *number = 0xffffffffffffffULL;
659 * Read the next element as an unsigned int.
660 * 0 is success, < 0 is failure.
662 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
667 return AVERROR_INVALIDDATA;
669 /* big-endian ordering; build up number */
672 *num = (*num << 8) | avio_r8(pb);
678 * Read the next element as a float.
679 * 0 is success, < 0 is failure.
681 static int ebml_read_float(AVIOContext *pb, int size, double *num)
685 } else if (size == 4) {
686 *num = av_int2float(avio_rb32(pb));
687 } else if (size == 8){
688 *num = av_int2double(avio_rb64(pb));
690 return AVERROR_INVALIDDATA;
696 * Read the next element as an ASCII string.
697 * 0 is success, < 0 is failure.
699 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
703 /* EBML strings are usually not 0-terminated, so we allocate one
704 * byte more, read the string and NULL-terminate it ourselves. */
705 if (!(res = av_malloc(size + 1)))
706 return AVERROR(ENOMEM);
707 if (avio_read(pb, (uint8_t *) res, size) != size) {
719 * Read the next element as binary data.
720 * 0 is success, < 0 is failure.
722 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
725 if (!(bin->data = av_malloc(length)))
726 return AVERROR(ENOMEM);
729 bin->pos = avio_tell(pb);
730 if (avio_read(pb, bin->data, length) != length) {
731 av_freep(&bin->data);
739 * Read the next element, but only the header. The contents
740 * are supposed to be sub-elements which can be read separately.
741 * 0 is success, < 0 is failure.
743 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
745 AVIOContext *pb = matroska->ctx->pb;
746 MatroskaLevel *level;
748 if (matroska->num_levels >= EBML_MAX_DEPTH) {
749 av_log(matroska->ctx, AV_LOG_ERROR,
750 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
751 return AVERROR(ENOSYS);
754 level = &matroska->levels[matroska->num_levels++];
755 level->start = avio_tell(pb);
756 level->length = length;
762 * Read signed/unsigned "EBML" numbers.
763 * Return: number of bytes processed, < 0 on error
765 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
766 uint8_t *data, uint32_t size, uint64_t *num)
769 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
770 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
774 * Same as above, but signed.
776 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
777 uint8_t *data, uint32_t size, int64_t *num)
782 /* read as unsigned number first */
783 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
786 /* make signed (weird way) */
787 *num = unum - ((1LL << (7*res - 1)) - 1);
792 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
793 EbmlSyntax *syntax, void *data);
795 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
796 uint32_t id, void *data)
799 for (i=0; syntax[i].id; i++)
800 if (id == syntax[i].id)
802 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
803 matroska->num_levels > 0 &&
804 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
805 return 0; // we reached the end of an unknown size cluster
806 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32)
807 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
808 return ebml_parse_elem(matroska, &syntax[i], data);
811 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
814 if (!matroska->current_id) {
816 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
819 matroska->current_id = id | 1 << 7*res;
821 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
824 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
829 for (i=0; syntax[i].id; i++)
830 switch (syntax[i].type) {
832 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
835 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
839 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
843 while (!res && !ebml_level_end(matroska))
844 res = ebml_parse(matroska, syntax, data);
849 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
850 EbmlSyntax *syntax, void *data)
852 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
855 // max. 16 MB for strings
856 [EBML_STR] = 0x1000000,
857 [EBML_UTF8] = 0x1000000,
858 // max. 256 MB for binary data
859 [EBML_BIN] = 0x10000000,
860 // no limits for anything else
862 AVIOContext *pb = matroska->ctx->pb;
863 uint32_t id = syntax->id;
868 data = (char *)data + syntax->data_offset;
869 if (syntax->list_elem_size) {
870 EbmlList *list = data;
871 newelem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
873 return AVERROR(ENOMEM);
874 list->elem = newelem;
875 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
876 memset(data, 0, syntax->list_elem_size);
880 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
881 matroska->current_id = 0;
882 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
884 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
885 av_log(matroska->ctx, AV_LOG_ERROR,
886 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
887 length, max_lengths[syntax->type], syntax->type);
888 return AVERROR_INVALIDDATA;
892 switch (syntax->type) {
893 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
894 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
896 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
897 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
898 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
900 if (id == MATROSKA_ID_SEGMENT)
901 matroska->segment_start = avio_tell(matroska->ctx->pb);
902 return ebml_parse_nest(matroska, syntax->def.n, data);
903 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
904 case EBML_STOP: return 1;
905 default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
907 if (res == AVERROR_INVALIDDATA)
908 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
909 else if (res == AVERROR(EIO))
910 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
914 static void ebml_free(EbmlSyntax *syntax, void *data)
917 for (i=0; syntax[i].id; i++) {
918 void *data_off = (char *)data + syntax[i].data_offset;
919 switch (syntax[i].type) {
921 case EBML_UTF8: av_freep(data_off); break;
922 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
924 if (syntax[i].list_elem_size) {
925 EbmlList *list = data_off;
926 char *ptr = list->elem;
927 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
928 ebml_free(syntax[i].def.n, ptr);
931 ebml_free(syntax[i].def.n, data_off);
941 static int matroska_probe(AVProbeData *p)
944 int len_mask = 0x80, size = 1, n = 1, i;
947 if (AV_RB32(p->buf) != EBML_ID_HEADER)
950 /* length of header */
952 while (size <= 8 && !(total & len_mask)) {
958 total &= (len_mask - 1);
960 total = (total << 8) | p->buf[4 + n++];
962 /* Does the probe data contain the whole header? */
963 if (p->buf_size < 4 + size + total)
966 /* The header should contain a known document type. For now,
967 * we don't parse the whole header but simply check for the
968 * availability of that array of characters inside the header.
969 * Not fully fool-proof, but good enough. */
970 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
971 int probelen = strlen(matroska_doctypes[i]);
972 if (total < probelen)
974 for (n = 4+size; n <= 4+size+total-probelen; n++)
975 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
976 return AVPROBE_SCORE_MAX;
979 // probably valid EBML header but no recognized doctype
980 return AVPROBE_SCORE_MAX/2;
983 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
986 MatroskaTrack *tracks = matroska->tracks.elem;
989 for (i=0; i < matroska->tracks.nb_elem; i++)
990 if (tracks[i].num == num)
993 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
997 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
998 MatroskaTrack *track)
1000 MatroskaTrackEncoding *encodings = track->encodings.elem;
1001 uint8_t* data = *buf;
1002 int isize = *buf_size;
1003 uint8_t* pkt_data = NULL;
1004 uint8_t av_unused *newpktdata;
1005 int pkt_size = isize;
1009 if (pkt_size >= 10000000)
1012 switch (encodings[0].compression.algo) {
1013 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1014 return encodings[0].compression.settings.size;
1015 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1017 olen = pkt_size *= 3;
1018 pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
1019 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1020 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
1026 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
1027 z_stream zstream = {0};
1028 if (inflateInit(&zstream) != Z_OK)
1030 zstream.next_in = data;
1031 zstream.avail_in = isize;
1034 newpktdata = av_realloc(pkt_data, pkt_size);
1036 inflateEnd(&zstream);
1039 pkt_data = newpktdata;
1040 zstream.avail_out = pkt_size - zstream.total_out;
1041 zstream.next_out = pkt_data + zstream.total_out;
1043 result = inflate(&zstream, Z_NO_FLUSH);
1045 result = Z_MEM_ERROR;
1046 } while (result==Z_OK && pkt_size<10000000);
1047 pkt_size = zstream.total_out;
1048 inflateEnd(&zstream);
1049 if (result != Z_STREAM_END)
1055 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
1056 bz_stream bzstream = {0};
1057 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1059 bzstream.next_in = data;
1060 bzstream.avail_in = isize;
1063 newpktdata = av_realloc(pkt_data, pkt_size);
1065 BZ2_bzDecompressEnd(&bzstream);
1068 pkt_data = newpktdata;
1069 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1070 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1072 result = BZ2_bzDecompress(&bzstream);
1074 result = BZ_MEM_ERROR;
1075 } while (result==BZ_OK && pkt_size<10000000);
1076 pkt_size = bzstream.total_out_lo32;
1077 BZ2_bzDecompressEnd(&bzstream);
1078 if (result != BZ_STREAM_END)
1088 *buf_size = pkt_size;
1095 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1096 AVPacket *pkt, uint64_t display_duration)
1098 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
1099 for (; *ptr!=',' && ptr<end-1; ptr++);
1103 for (; *ptr!=',' && ptr<end-1; ptr++);
1105 int64_t end_pts = pkt->pts + display_duration;
1106 int sc = matroska->time_scale * pkt->pts / 10000000;
1107 int ec = matroska->time_scale * end_pts / 10000000;
1108 int sh, sm, ss, eh, em, es, len;
1109 sh = sc/360000; sc -= 360000*sh;
1110 sm = sc/ 6000; sc -= 6000*sm;
1111 ss = sc/ 100; sc -= 100*ss;
1112 eh = ec/360000; ec -= 360000*eh;
1113 em = ec/ 6000; ec -= 6000*em;
1114 es = ec/ 100; ec -= 100*es;
1116 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1117 if (!(line = av_malloc(len)))
1119 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1120 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1123 pkt->size = strlen(line);
1127 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1129 void *newdata = av_realloc(out->data, out->size+in->size);
1131 return AVERROR(ENOMEM);
1132 out->data = newdata;
1133 memcpy(out->data+out->size, in->data, in->size);
1134 out->size += in->size;
1135 av_destruct_packet(in);
1140 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1141 AVDictionary **metadata, char *prefix)
1143 MatroskaTag *tags = list->elem;
1147 for (i=0; i < list->nb_elem; i++) {
1148 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1150 if (!tags[i].name) {
1151 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1154 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1155 else av_strlcpy(key, tags[i].name, sizeof(key));
1156 if (tags[i].def || !lang) {
1157 av_dict_set(metadata, key, tags[i].string, 0);
1158 if (tags[i].sub.nb_elem)
1159 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1162 av_strlcat(key, "-", sizeof(key));
1163 av_strlcat(key, lang, sizeof(key));
1164 av_dict_set(metadata, key, tags[i].string, 0);
1165 if (tags[i].sub.nb_elem)
1166 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1169 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1172 static void matroska_convert_tags(AVFormatContext *s)
1174 MatroskaDemuxContext *matroska = s->priv_data;
1175 MatroskaTags *tags = matroska->tags.elem;
1178 for (i=0; i < matroska->tags.nb_elem; i++) {
1179 if (tags[i].target.attachuid) {
1180 MatroskaAttachement *attachment = matroska->attachments.elem;
1181 for (j=0; j<matroska->attachments.nb_elem; j++)
1182 if (attachment[j].uid == tags[i].target.attachuid
1183 && attachment[j].stream)
1184 matroska_convert_tag(s, &tags[i].tag,
1185 &attachment[j].stream->metadata, NULL);
1186 } else if (tags[i].target.chapteruid) {
1187 MatroskaChapter *chapter = matroska->chapters.elem;
1188 for (j=0; j<matroska->chapters.nb_elem; j++)
1189 if (chapter[j].uid == tags[i].target.chapteruid
1190 && chapter[j].chapter)
1191 matroska_convert_tag(s, &tags[i].tag,
1192 &chapter[j].chapter->metadata, NULL);
1193 } else if (tags[i].target.trackuid) {
1194 MatroskaTrack *track = matroska->tracks.elem;
1195 for (j=0; j<matroska->tracks.nb_elem; j++)
1196 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1197 matroska_convert_tag(s, &tags[i].tag,
1198 &track[j].stream->metadata, NULL);
1200 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1201 tags[i].target.type);
1206 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
1208 EbmlList *seekhead_list = &matroska->seekhead;
1209 MatroskaSeekhead *seekhead = seekhead_list->elem;
1210 uint32_t level_up = matroska->level_up;
1211 int64_t before_pos = avio_tell(matroska->ctx->pb);
1212 uint32_t saved_id = matroska->current_id;
1213 MatroskaLevel level;
1217 if (idx >= seekhead_list->nb_elem
1218 || seekhead[idx].id == MATROSKA_ID_SEEKHEAD
1219 || seekhead[idx].id == MATROSKA_ID_CLUSTER)
1223 offset = seekhead[idx].pos + matroska->segment_start;
1224 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1225 /* We don't want to lose our seekhead level, so we add
1226 * a dummy. This is a crude hack. */
1227 if (matroska->num_levels == EBML_MAX_DEPTH) {
1228 av_log(matroska->ctx, AV_LOG_INFO,
1229 "Max EBML element depth (%d) reached, "
1230 "cannot parse further.\n", EBML_MAX_DEPTH);
1231 ret = AVERROR_INVALIDDATA;
1234 level.length = (uint64_t)-1;
1235 matroska->levels[matroska->num_levels] = level;
1236 matroska->num_levels++;
1237 matroska->current_id = 0;
1239 ret = ebml_parse(matroska, matroska_segment, matroska);
1241 /* remove dummy level */
1242 while (matroska->num_levels) {
1243 uint64_t length = matroska->levels[--matroska->num_levels].length;
1244 if (length == (uint64_t)-1)
1250 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1251 matroska->level_up = level_up;
1252 matroska->current_id = saved_id;
1257 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1259 EbmlList *seekhead_list = &matroska->seekhead;
1260 int64_t before_pos = avio_tell(matroska->ctx->pb);
1263 // we should not do any seeking in the streaming case
1264 if (!matroska->ctx->pb->seekable ||
1265 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1268 for (i = 0; i < seekhead_list->nb_elem; i++) {
1269 MatroskaSeekhead *seekhead = seekhead_list->elem;
1270 if (seekhead[i].pos <= before_pos)
1273 // defer cues parsing until we actually need cue data.
1274 if (seekhead[i].id == MATROSKA_ID_CUES) {
1275 matroska->cues_parsing_deferred = 1;
1279 if (matroska_parse_seekhead_entry(matroska, i) < 0) {
1280 // mark index as broken
1281 matroska->cues_parsing_deferred = -1;
1287 static void matroska_add_index_entries(MatroskaDemuxContext *matroska) {
1288 EbmlList *index_list;
1289 MatroskaIndex *index;
1290 int index_scale = 1;
1293 index_list = &matroska->index;
1294 index = index_list->elem;
1295 if (index_list->nb_elem
1296 && index[0].time > 1E14/matroska->time_scale) {
1297 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1298 index_scale = matroska->time_scale;
1300 for (i = 0; i < index_list->nb_elem; i++) {
1301 EbmlList *pos_list = &index[i].pos;
1302 MatroskaIndexPos *pos = pos_list->elem;
1303 for (j = 0; j < pos_list->nb_elem; j++) {
1304 MatroskaTrack *track = matroska_find_track_by_num(matroska, pos[j].track);
1305 if (track && track->stream)
1306 av_add_index_entry(track->stream,
1307 pos[j].pos + matroska->segment_start,
1308 index[i].time/index_scale, 0, 0,
1314 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1315 EbmlList *seekhead_list = &matroska->seekhead;
1316 MatroskaSeekhead *seekhead = seekhead_list->elem;
1319 for (i = 0; i < seekhead_list->nb_elem; i++)
1320 if (seekhead[i].id == MATROSKA_ID_CUES)
1322 assert(i <= seekhead_list->nb_elem);
1324 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1325 matroska->cues_parsing_deferred = -1;
1326 matroska_add_index_entries(matroska);
1329 static int matroska_aac_profile(char *codec_id)
1331 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1334 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1335 if (strstr(codec_id, aac_profiles[profile]))
1340 static int matroska_aac_sri(int samplerate)
1344 for (sri=0; sri<FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1345 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1350 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1353 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1354 time_t creation_time = date_utc / 1000000000 + 978307200;
1355 struct tm *ptm = gmtime(&creation_time);
1357 strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
1358 av_dict_set(metadata, "creation_time", buffer, 0);
1361 static int matroska_read_header(AVFormatContext *s)
1363 MatroskaDemuxContext *matroska = s->priv_data;
1364 EbmlList *attachements_list = &matroska->attachments;
1365 MatroskaAttachement *attachements;
1366 EbmlList *chapters_list = &matroska->chapters;
1367 MatroskaChapter *chapters;
1368 MatroskaTrack *tracks;
1369 uint64_t max_start = 0;
1377 /* First read the EBML header. */
1378 if (ebml_parse(matroska, ebml_syntax, &ebml)
1379 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1380 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 3) {
1381 av_log(matroska->ctx, AV_LOG_ERROR,
1382 "EBML header using unsupported features\n"
1383 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1384 ebml.version, ebml.doctype, ebml.doctype_version);
1385 ebml_free(ebml_syntax, &ebml);
1386 return AVERROR_PATCHWELCOME;
1387 } else if (ebml.doctype_version == 3) {
1388 av_log(matroska->ctx, AV_LOG_WARNING,
1389 "EBML header using unsupported features\n"
1390 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1391 ebml.version, ebml.doctype, ebml.doctype_version);
1393 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1394 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1396 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1397 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1399 ebml_free(ebml_syntax, &ebml);
1401 /* The next thing is a segment. */
1402 pos = avio_tell(matroska->ctx->pb);
1403 res = ebml_parse(matroska, matroska_segments, matroska);
1404 // try resyncing until we find a EBML_STOP type element.
1406 res = matroska_resync(matroska, pos);
1409 pos = avio_tell(matroska->ctx->pb);
1410 res = ebml_parse(matroska, matroska_segment, matroska);
1412 matroska_execute_seekhead(matroska);
1414 if (!matroska->time_scale)
1415 matroska->time_scale = 1000000;
1416 if (matroska->duration)
1417 matroska->ctx->duration = matroska->duration * matroska->time_scale
1418 * 1000 / AV_TIME_BASE;
1419 av_dict_set(&s->metadata, "title", matroska->title, 0);
1421 if (matroska->date_utc.size == 8)
1422 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
1424 tracks = matroska->tracks.elem;
1425 for (i=0; i < matroska->tracks.nb_elem; i++) {
1426 MatroskaTrack *track = &tracks[i];
1427 enum CodecID codec_id = CODEC_ID_NONE;
1428 EbmlList *encodings_list = &track->encodings;
1429 MatroskaTrackEncoding *encodings = encodings_list->elem;
1430 uint8_t *extradata = NULL;
1431 int extradata_size = 0;
1432 int extradata_offset = 0;
1433 uint32_t fourcc = 0;
1436 /* Apply some sanity checks. */
1437 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1438 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1439 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1440 av_log(matroska->ctx, AV_LOG_INFO,
1441 "Unknown or unsupported track type %"PRIu64"\n",
1445 if (track->codec_id == NULL)
1448 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1449 if (!track->default_duration)
1450 track->default_duration = 1000000000/track->video.frame_rate;
1451 if (!track->video.display_width)
1452 track->video.display_width = track->video.pixel_width;
1453 if (!track->video.display_height)
1454 track->video.display_height = track->video.pixel_height;
1455 if (track->video.color_space.size == 4)
1456 fourcc = AV_RL32(track->video.color_space.data);
1457 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1458 if (!track->audio.out_samplerate)
1459 track->audio.out_samplerate = track->audio.samplerate;
1461 if (encodings_list->nb_elem > 1) {
1462 av_log(matroska->ctx, AV_LOG_ERROR,
1463 "Multiple combined encodings not supported");
1464 } else if (encodings_list->nb_elem == 1) {
1465 if (encodings[0].type ||
1466 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1468 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1471 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1473 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1474 encodings[0].scope = 0;
1475 av_log(matroska->ctx, AV_LOG_ERROR,
1476 "Unsupported encoding type");
1477 } else if (track->codec_priv.size && encodings[0].scope&2) {
1478 uint8_t *codec_priv = track->codec_priv.data;
1479 int offset = matroska_decode_buffer(&track->codec_priv.data,
1480 &track->codec_priv.size,
1483 track->codec_priv.data = NULL;
1484 track->codec_priv.size = 0;
1485 av_log(matroska->ctx, AV_LOG_ERROR,
1486 "Failed to decode codec private data\n");
1487 } else if (offset > 0) {
1488 track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1489 memcpy(track->codec_priv.data,
1490 encodings[0].compression.settings.data, offset);
1491 memcpy(track->codec_priv.data+offset, codec_priv,
1492 track->codec_priv.size);
1493 track->codec_priv.size += offset;
1495 if (codec_priv != track->codec_priv.data)
1496 av_free(codec_priv);
1500 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1501 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1502 strlen(ff_mkv_codec_tags[j].str))){
1503 codec_id= ff_mkv_codec_tags[j].id;
1508 st = track->stream = avformat_new_stream(s, NULL);
1510 return AVERROR(ENOMEM);
1512 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1513 && track->codec_priv.size >= 40
1514 && track->codec_priv.data != NULL) {
1515 track->ms_compat = 1;
1516 fourcc = AV_RL32(track->codec_priv.data + 16);
1517 codec_id = ff_codec_get_id(ff_codec_bmp_tags, fourcc);
1518 extradata_offset = 40;
1519 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1520 && track->codec_priv.size >= 14
1521 && track->codec_priv.data != NULL) {
1523 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1524 AVIO_FLAG_READ, NULL, NULL, NULL, NULL);
1525 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1528 codec_id = st->codec->codec_id;
1529 extradata_offset = FFMIN(track->codec_priv.size, 18);
1530 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1531 && (track->codec_priv.size >= 86)
1532 && (track->codec_priv.data != NULL)) {
1533 fourcc = AV_RL32(track->codec_priv.data);
1534 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1535 } else if (codec_id == CODEC_ID_PCM_S16BE) {
1536 switch (track->audio.bitdepth) {
1537 case 8: codec_id = CODEC_ID_PCM_U8; break;
1538 case 24: codec_id = CODEC_ID_PCM_S24BE; break;
1539 case 32: codec_id = CODEC_ID_PCM_S32BE; break;
1541 } else if (codec_id == CODEC_ID_PCM_S16LE) {
1542 switch (track->audio.bitdepth) {
1543 case 8: codec_id = CODEC_ID_PCM_U8; break;
1544 case 24: codec_id = CODEC_ID_PCM_S24LE; break;
1545 case 32: codec_id = CODEC_ID_PCM_S32LE; break;
1547 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1548 codec_id = CODEC_ID_PCM_F64LE;
1549 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1550 int profile = matroska_aac_profile(track->codec_id);
1551 int sri = matroska_aac_sri(track->audio.samplerate);
1552 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1553 if (extradata == NULL)
1554 return AVERROR(ENOMEM);
1555 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1556 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1557 if (strstr(track->codec_id, "SBR")) {
1558 sri = matroska_aac_sri(track->audio.out_samplerate);
1559 extradata[2] = 0x56;
1560 extradata[3] = 0xE5;
1561 extradata[4] = 0x80 | (sri<<3);
1565 } else if (codec_id == CODEC_ID_TTA) {
1566 extradata_size = 30;
1567 extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1568 if (extradata == NULL)
1569 return AVERROR(ENOMEM);
1570 ffio_init_context(&b, extradata, extradata_size, 1,
1571 NULL, NULL, NULL, NULL);
1572 avio_write(&b, "TTA1", 4);
1574 avio_wl16(&b, track->audio.channels);
1575 avio_wl16(&b, track->audio.bitdepth);
1576 avio_wl32(&b, track->audio.out_samplerate);
1577 avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1578 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1579 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1580 extradata_offset = 26;
1581 } else if (codec_id == CODEC_ID_RA_144) {
1582 track->audio.out_samplerate = 8000;
1583 track->audio.channels = 1;
1584 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1585 codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) {
1587 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
1588 0, NULL, NULL, NULL, NULL);
1590 flavor = avio_rb16(&b);
1591 track->audio.coded_framesize = avio_rb32(&b);
1593 track->audio.sub_packet_h = avio_rb16(&b);
1594 track->audio.frame_size = avio_rb16(&b);
1595 track->audio.sub_packet_size = avio_rb16(&b);
1596 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1597 if (codec_id == CODEC_ID_RA_288) {
1598 st->codec->block_align = track->audio.coded_framesize;
1599 track->codec_priv.size = 0;
1601 if (codec_id == CODEC_ID_SIPR && flavor < 4) {
1602 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1603 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1604 st->codec->bit_rate = sipr_bit_rate[flavor];
1606 st->codec->block_align = track->audio.sub_packet_size;
1607 extradata_offset = 78;
1610 track->codec_priv.size -= extradata_offset;
1612 if (codec_id == CODEC_ID_NONE)
1613 av_log(matroska->ctx, AV_LOG_INFO,
1614 "Unknown/unsupported CodecID %s.\n", track->codec_id);
1616 if (track->time_scale < 0.01)
1617 track->time_scale = 1.0;
1618 avpriv_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1620 st->codec->codec_id = codec_id;
1622 if (strcmp(track->language, "und"))
1623 av_dict_set(&st->metadata, "language", track->language, 0);
1624 av_dict_set(&st->metadata, "title", track->name, 0);
1626 if (track->flag_default)
1627 st->disposition |= AV_DISPOSITION_DEFAULT;
1628 if (track->flag_forced)
1629 st->disposition |= AV_DISPOSITION_FORCED;
1631 if (!st->codec->extradata) {
1633 st->codec->extradata = extradata;
1634 st->codec->extradata_size = extradata_size;
1635 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1636 st->codec->extradata = av_mallocz(track->codec_priv.size +
1637 FF_INPUT_BUFFER_PADDING_SIZE);
1638 if(st->codec->extradata == NULL)
1639 return AVERROR(ENOMEM);
1640 st->codec->extradata_size = track->codec_priv.size;
1641 memcpy(st->codec->extradata,
1642 track->codec_priv.data + extradata_offset,
1643 track->codec_priv.size);
1647 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1648 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
1650 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1651 st->codec->codec_tag = fourcc;
1652 st->codec->width = track->video.pixel_width;
1653 st->codec->height = track->video.pixel_height;
1654 av_reduce(&st->sample_aspect_ratio.num,
1655 &st->sample_aspect_ratio.den,
1656 st->codec->height * track->video.display_width,
1657 st->codec-> width * track->video.display_height,
1659 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1660 if (track->default_duration)
1661 st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX);
1663 /* export stereo mode flag as metadata tag */
1664 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREO_MODE_COUNT)
1665 av_dict_set(&st->metadata, "stereo_mode", matroska_video_stereo_mode[track->video.stereo_mode], 0);
1667 /* if we have virtual track, mark the real tracks */
1668 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
1670 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
1672 snprintf(buf, sizeof(buf), "%s_%d",
1673 matroska_video_stereo_plane[planes[j].type], i);
1674 for (k=0; k < matroska->tracks.nb_elem; k++)
1675 if (planes[j].uid == tracks[k].uid) {
1676 av_dict_set(&s->streams[k]->metadata,
1677 "stereo_mode", buf, 0);
1681 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1682 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1683 st->codec->sample_rate = track->audio.out_samplerate;
1684 st->codec->channels = track->audio.channels;
1685 if (st->codec->codec_id != CODEC_ID_AAC)
1686 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1687 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1688 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1692 attachements = attachements_list->elem;
1693 for (j=0; j<attachements_list->nb_elem; j++) {
1694 if (!(attachements[j].filename && attachements[j].mime &&
1695 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1696 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1698 AVStream *st = avformat_new_stream(s, NULL);
1701 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
1702 av_dict_set(&st->metadata, "mimetype", attachements[j].mime, 0);
1703 st->codec->codec_id = CODEC_ID_NONE;
1704 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1705 st->codec->extradata = av_malloc(attachements[j].bin.size + FF_INPUT_BUFFER_PADDING_SIZE);
1706 if(st->codec->extradata == NULL)
1708 st->codec->extradata_size = attachements[j].bin.size;
1709 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1711 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1712 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1713 strlen(ff_mkv_mime_tags[i].str))) {
1714 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1718 attachements[j].stream = st;
1722 chapters = chapters_list->elem;
1723 for (i=0; i<chapters_list->nb_elem; i++)
1724 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1725 && (max_start==0 || chapters[i].start > max_start)) {
1726 chapters[i].chapter =
1727 avpriv_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1728 chapters[i].start, chapters[i].end,
1730 av_dict_set(&chapters[i].chapter->metadata,
1731 "title", chapters[i].title, 0);
1732 max_start = chapters[i].start;
1735 matroska_add_index_entries(matroska);
1737 matroska_convert_tags(s);
1743 * Put one packet in an application-supplied AVPacket struct.
1744 * Returns 0 on success or -1 on failure.
1746 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1749 if (matroska->num_packets > 0) {
1750 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1751 av_free(matroska->packets[0]);
1752 if (matroska->num_packets > 1) {
1754 memmove(&matroska->packets[0], &matroska->packets[1],
1755 (matroska->num_packets - 1) * sizeof(AVPacket *));
1756 newpackets = av_realloc(matroska->packets,
1757 (matroska->num_packets - 1) * sizeof(AVPacket *));
1759 matroska->packets = newpackets;
1761 av_freep(&matroska->packets);
1763 matroska->num_packets--;
1771 * Free all packets in our internal queue.
1773 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1775 if (matroska->packets) {
1777 for (n = 0; n < matroska->num_packets; n++) {
1778 av_free_packet(matroska->packets[n]);
1779 av_free(matroska->packets[n]);
1781 av_freep(&matroska->packets);
1782 matroska->num_packets = 0;
1786 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1787 int size, int64_t pos, uint64_t cluster_time,
1788 uint64_t duration, int is_keyframe,
1789 int64_t cluster_pos)
1791 uint64_t timecode = AV_NOPTS_VALUE;
1792 MatroskaTrack *track;
1797 uint32_t *lace_size = NULL;
1798 int n, flags, laces = 0;
1801 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
1802 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1803 return AVERROR_INVALIDDATA;
1808 track = matroska_find_track_by_num(matroska, num);
1809 if (!track || !track->stream) {
1810 av_log(matroska->ctx, AV_LOG_INFO,
1811 "Invalid stream %"PRIu64" or size %u\n", num, size);
1812 return AVERROR_INVALIDDATA;
1813 } else if (size <= 3)
1816 if (st->discard >= AVDISCARD_ALL)
1819 duration = track->default_duration / matroska->time_scale;
1821 block_time = AV_RB16(data);
1825 if (is_keyframe == -1)
1826 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
1828 if (cluster_time != (uint64_t)-1
1829 && (block_time >= 0 || cluster_time >= -block_time)) {
1830 timecode = cluster_time + block_time;
1831 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
1832 && timecode < track->end_timecode)
1833 is_keyframe = 0; /* overlapping subtitles are not key frame */
1835 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
1836 track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
1839 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1840 if (!is_keyframe || timecode < matroska->skip_to_timecode)
1842 matroska->skip_to_keyframe = 0;
1845 switch ((flags & 0x06) >> 1) {
1846 case 0x0: /* no lacing */
1848 lace_size = av_mallocz(sizeof(int));
1849 lace_size[0] = size;
1852 case 0x1: /* Xiph lacing */
1853 case 0x2: /* fixed-size lacing */
1854 case 0x3: /* EBML lacing */
1855 assert(size>0); // size <=3 is checked before size-=3 above
1856 laces = (*data) + 1;
1859 lace_size = av_mallocz(laces * sizeof(int));
1861 switch ((flags & 0x06) >> 1) {
1862 case 0x1: /* Xiph lacing */ {
1865 for (n = 0; res == 0 && n < laces - 1; n++) {
1872 lace_size[n] += temp;
1878 total += lace_size[n];
1880 lace_size[n] = size - total;
1884 case 0x2: /* fixed-size lacing */
1885 for (n = 0; n < laces; n++)
1886 lace_size[n] = size / laces;
1889 case 0x3: /* EBML lacing */ {
1891 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1893 av_log(matroska->ctx, AV_LOG_INFO,
1894 "EBML block data error\n");
1899 total = lace_size[0] = num;
1900 for (n = 1; res == 0 && n < laces - 1; n++) {
1903 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1905 av_log(matroska->ctx, AV_LOG_INFO,
1906 "EBML block data error\n");
1911 lace_size[n] = lace_size[n - 1] + snum;
1912 total += lace_size[n];
1914 lace_size[laces - 1] = size - total;
1922 for (n = 0; n < laces; n++) {
1923 if ((st->codec->codec_id == CODEC_ID_RA_288 ||
1924 st->codec->codec_id == CODEC_ID_COOK ||
1925 st->codec->codec_id == CODEC_ID_SIPR ||
1926 st->codec->codec_id == CODEC_ID_ATRAC3) &&
1927 st->codec->block_align && track->audio.sub_packet_size) {
1928 int a = st->codec->block_align;
1929 int sps = track->audio.sub_packet_size;
1930 int cfs = track->audio.coded_framesize;
1931 int h = track->audio.sub_packet_h;
1932 int y = track->audio.sub_packet_cnt;
1933 int w = track->audio.frame_size;
1936 if (!track->audio.pkt_cnt) {
1937 if (track->audio.sub_packet_cnt == 0)
1938 track->audio.buf_timecode = timecode;
1939 if (st->codec->codec_id == CODEC_ID_RA_288) {
1940 if (size < cfs * h / 2) {
1941 av_log(matroska->ctx, AV_LOG_ERROR,
1942 "Corrupt int4 RM-style audio packet size\n");
1943 return AVERROR_INVALIDDATA;
1945 for (x=0; x<h/2; x++)
1946 memcpy(track->audio.buf+x*2*w+y*cfs,
1948 } else if (st->codec->codec_id == CODEC_ID_SIPR) {
1950 av_log(matroska->ctx, AV_LOG_ERROR,
1951 "Corrupt sipr RM-style audio packet size\n");
1952 return AVERROR_INVALIDDATA;
1954 memcpy(track->audio.buf + y*w, data, w);
1956 if (size < sps * w / sps) {
1957 av_log(matroska->ctx, AV_LOG_ERROR,
1958 "Corrupt generic RM-style audio packet size\n");
1959 return AVERROR_INVALIDDATA;
1961 for (x=0; x<w/sps; x++)
1962 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1965 if (++track->audio.sub_packet_cnt >= h) {
1966 if (st->codec->codec_id == CODEC_ID_SIPR)
1967 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
1968 track->audio.sub_packet_cnt = 0;
1969 track->audio.pkt_cnt = h*w / a;
1972 while (track->audio.pkt_cnt) {
1973 pkt = av_mallocz(sizeof(AVPacket));
1974 av_new_packet(pkt, a);
1975 memcpy(pkt->data, track->audio.buf
1976 + a * (h*w / a - track->audio.pkt_cnt--), a);
1977 pkt->pts = track->audio.buf_timecode;
1978 track->audio.buf_timecode = AV_NOPTS_VALUE;
1980 pkt->stream_index = st->index;
1981 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1984 MatroskaTrackEncoding *encodings = track->encodings.elem;
1985 int offset = 0, pkt_size = lace_size[n];
1986 uint8_t *pkt_data = data;
1988 if (pkt_size > size) {
1989 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
1993 if (encodings && encodings->scope & 1) {
1994 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1999 pkt = av_mallocz(sizeof(AVPacket));
2000 /* XXX: prevent data copy... */
2001 if (av_new_packet(pkt, pkt_size+offset) < 0) {
2003 res = AVERROR(ENOMEM);
2007 memcpy (pkt->data, encodings->compression.settings.data, offset);
2008 memcpy (pkt->data+offset, pkt_data, pkt_size);
2010 if (pkt_data != data)
2014 pkt->flags = is_keyframe;
2015 pkt->stream_index = st->index;
2017 if (track->ms_compat)
2018 pkt->dts = timecode;
2020 pkt->pts = timecode;
2022 if (st->codec->codec_id == CODEC_ID_TEXT)
2023 pkt->convergence_duration = duration;
2024 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
2025 pkt->duration = duration;
2027 if (st->codec->codec_id == CODEC_ID_SSA)
2028 matroska_fix_ass_packet(matroska, pkt, duration);
2030 if (matroska->prev_pkt &&
2031 timecode != AV_NOPTS_VALUE &&
2032 matroska->prev_pkt->pts == timecode &&
2033 matroska->prev_pkt->stream_index == st->index &&
2034 st->codec->codec_id == CODEC_ID_SSA)
2035 matroska_merge_packets(matroska->prev_pkt, pkt);
2037 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
2038 matroska->prev_pkt = pkt;
2042 if (timecode != AV_NOPTS_VALUE)
2043 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2044 data += lace_size[n];
2045 size -= lace_size[n];
2053 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2055 MatroskaCluster cluster = { 0 };
2056 EbmlList *blocks_list;
2057 MatroskaBlock *blocks;
2059 int64_t pos = avio_tell(matroska->ctx->pb);
2060 matroska->prev_pkt = NULL;
2061 if (matroska->current_id)
2062 pos -= 4; /* sizeof the ID which was already read */
2063 res = ebml_parse(matroska, matroska_clusters, &cluster);
2064 blocks_list = &cluster.blocks;
2065 blocks = blocks_list->elem;
2066 for (i=0; i<blocks_list->nb_elem; i++)
2067 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2068 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2069 res=matroska_parse_block(matroska,
2070 blocks[i].bin.data, blocks[i].bin.size,
2071 blocks[i].bin.pos, cluster.timecode,
2072 blocks[i].duration, is_keyframe,
2075 ebml_free(matroska_cluster, &cluster);
2079 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2081 MatroskaDemuxContext *matroska = s->priv_data;
2083 while (matroska_deliver_packet(matroska, pkt)) {
2084 int64_t pos = avio_tell(matroska->ctx->pb);
2087 if (matroska_parse_cluster(matroska) < 0)
2088 matroska_resync(matroska, pos);
2094 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2095 int64_t timestamp, int flags)
2097 MatroskaDemuxContext *matroska = s->priv_data;
2098 MatroskaTrack *tracks = matroska->tracks.elem;
2099 AVStream *st = s->streams[stream_index];
2100 int i, index, index_sub, index_min;
2102 /* Parse the CUES now since we need the index data to seek. */
2103 if (matroska->cues_parsing_deferred > 0) {
2104 matroska->cues_parsing_deferred = 0;
2105 matroska_parse_cues(matroska);
2108 if (!st->nb_index_entries)
2110 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2112 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2113 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
2114 matroska->current_id = 0;
2115 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2116 matroska_clear_queue(matroska);
2117 if (matroska_parse_cluster(matroska) < 0)
2122 matroska_clear_queue(matroska);
2123 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
2127 for (i=0; i < matroska->tracks.nb_elem; i++) {
2128 tracks[i].audio.pkt_cnt = 0;
2129 tracks[i].audio.sub_packet_cnt = 0;
2130 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2131 tracks[i].end_timecode = 0;
2132 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
2133 && !tracks[i].stream->discard != AVDISCARD_ALL) {
2134 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
2136 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
2137 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
2138 index_min = index_sub;
2142 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2143 matroska->current_id = 0;
2144 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2145 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2147 matroska->num_levels = 0;
2148 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2151 // slightly hackish but allows proper fallback to
2152 // the generic seeking code.
2153 matroska_clear_queue(matroska);
2154 matroska->current_id = 0;
2155 matroska->skip_to_keyframe = 0;
2157 matroska->num_levels = 0;
2161 static int matroska_read_close(AVFormatContext *s)
2163 MatroskaDemuxContext *matroska = s->priv_data;
2164 MatroskaTrack *tracks = matroska->tracks.elem;
2167 matroska_clear_queue(matroska);
2169 for (n=0; n < matroska->tracks.nb_elem; n++)
2170 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2171 av_free(tracks[n].audio.buf);
2172 ebml_free(matroska_segment, matroska);
2177 AVInputFormat ff_matroska_demuxer = {
2178 .name = "matroska,webm",
2179 .long_name = NULL_IF_CONFIG_SMALL("Matroska/WebM file format"),
2180 .priv_data_size = sizeof(MatroskaDemuxContext),
2181 .read_probe = matroska_probe,
2182 .read_header = matroska_read_header,
2183 .read_packet = matroska_read_packet,
2184 .read_close = matroska_read_close,
2185 .read_seek = matroska_read_seek,