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/bytestream.h"
41 #include "libavcodec/mpeg4audio.h"
42 #include "libavutil/base64.h"
43 #include "libavutil/intfloat.h"
44 #include "libavutil/intreadwrite.h"
45 #include "libavutil/avstring.h"
46 #include "libavutil/lzo.h"
47 #include "libavutil/dict.h"
68 typedef const struct EbmlSyntax {
77 const struct EbmlSyntax *n;
97 uint64_t doctype_version;
103 } MatroskaTrackCompression;
108 } MatroskaTrackEncryption;
113 MatroskaTrackCompression compression;
114 MatroskaTrackEncryption encryption;
115 } MatroskaTrackEncoding;
119 uint64_t display_width;
120 uint64_t display_height;
121 uint64_t pixel_width;
122 uint64_t pixel_height;
124 uint64_t stereo_mode;
126 } MatroskaTrackVideo;
130 double out_samplerate;
134 /* real audio header (extracted from extradata) */
141 uint64_t buf_timecode;
143 } MatroskaTrackAudio;
148 } MatroskaTrackPlane;
151 EbmlList combine_planes;
152 } MatroskaTrackOperation;
163 uint64_t default_duration;
164 uint64_t flag_default;
165 uint64_t flag_forced;
166 uint64_t codec_delay;
167 uint64_t seek_preroll;
168 MatroskaTrackVideo video;
169 MatroskaTrackAudio audio;
170 MatroskaTrackOperation operation;
174 int64_t end_timecode;
176 uint64_t max_block_additional_id;
186 } MatroskaAttachement;
224 MatroskaTagTarget target;
244 AVFormatContext *ctx;
248 MatroskaLevel levels[EBML_MAX_DEPTH];
257 EbmlList attachments;
263 /* byte position of the segment inside the stream */
264 int64_t segment_start;
266 /* the packet queue */
273 /* What to skip before effectively reading a packet. */
274 int skip_to_keyframe;
275 uint64_t skip_to_timecode;
277 /* File has a CUES element, but we defer parsing until it is needed. */
278 int cues_parsing_deferred;
280 int current_cluster_num_blocks;
281 int64_t current_cluster_pos;
282 MatroskaCluster current_cluster;
284 /* File has SSA subtitles which prevent incremental cluster parsing. */
286 } MatroskaDemuxContext;
293 uint64_t additional_id;
295 uint64_t discard_padding;
298 static EbmlSyntax ebml_header[] = {
299 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
300 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
301 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
302 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
303 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
304 { EBML_ID_EBMLVERSION, EBML_NONE },
305 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
309 static EbmlSyntax ebml_syntax[] = {
310 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
314 static EbmlSyntax matroska_info[] = {
315 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
316 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
317 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
318 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
319 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
320 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext,date_utc) },
321 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
325 static EbmlSyntax matroska_track_video[] = {
326 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
327 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width), {.u=-1} },
328 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height), {.u=-1} },
329 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
330 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
331 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo,color_space) },
332 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,stereo_mode) },
333 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,alpha_mode) },
334 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
335 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
336 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
337 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
338 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
339 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
340 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
344 static EbmlSyntax matroska_track_audio[] = {
345 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
346 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
347 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
348 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
352 static EbmlSyntax matroska_track_encoding_compression[] = {
353 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
354 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
358 static EbmlSyntax matroska_track_encoding_encryption[] = {
359 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u=0} },
360 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
361 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
362 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
363 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
364 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
365 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
368 static EbmlSyntax matroska_track_encoding[] = {
369 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
370 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
371 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
372 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding,encryption), {.n=matroska_track_encoding_encryption} },
373 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
377 static EbmlSyntax matroska_track_encodings[] = {
378 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
382 static EbmlSyntax matroska_track_plane[] = {
383 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
384 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
388 static EbmlSyntax matroska_track_combine_planes[] = {
389 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n=matroska_track_plane} },
393 static EbmlSyntax matroska_track_operation[] = {
394 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n=matroska_track_combine_planes} },
398 static EbmlSyntax matroska_track[] = {
399 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
400 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
401 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
402 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
403 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
404 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
405 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
406 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
407 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
408 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
409 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
410 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
411 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
412 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack,operation), {.n=matroska_track_operation} },
413 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
414 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack,max_block_additional_id) },
415 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack,codec_delay) },
416 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack,seek_preroll) },
417 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
418 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
419 { MATROSKA_ID_CODECNAME, EBML_NONE },
420 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
421 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
422 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
423 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
424 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
428 static EbmlSyntax matroska_tracks[] = {
429 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
433 static EbmlSyntax matroska_attachment[] = {
434 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
435 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
436 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
437 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
438 { MATROSKA_ID_FILEDESC, EBML_NONE },
442 static EbmlSyntax matroska_attachments[] = {
443 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
447 static EbmlSyntax matroska_chapter_display[] = {
448 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
449 { MATROSKA_ID_CHAPLANG, EBML_NONE },
453 static EbmlSyntax matroska_chapter_entry[] = {
454 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
455 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
456 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
457 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
458 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
459 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
460 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
461 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
465 static EbmlSyntax matroska_chapter[] = {
466 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
467 { MATROSKA_ID_EDITIONUID, EBML_NONE },
468 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
469 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
470 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
474 static EbmlSyntax matroska_chapters[] = {
475 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
479 static EbmlSyntax matroska_index_pos[] = {
480 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
481 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
482 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
483 { MATROSKA_ID_CUEDURATION, EBML_NONE },
484 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
488 static EbmlSyntax matroska_index_entry[] = {
489 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
490 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
494 static EbmlSyntax matroska_index[] = {
495 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
499 static EbmlSyntax matroska_simpletag[] = {
500 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
501 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
502 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
503 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
504 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
505 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
509 static EbmlSyntax matroska_tagtargets[] = {
510 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
511 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
512 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
513 { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
514 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
518 static EbmlSyntax matroska_tag[] = {
519 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
520 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
524 static EbmlSyntax matroska_tags[] = {
525 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
529 static EbmlSyntax matroska_seekhead_entry[] = {
530 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
531 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
535 static EbmlSyntax matroska_seekhead[] = {
536 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
540 static EbmlSyntax matroska_segment[] = {
541 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
542 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
543 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
544 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
545 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
546 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
547 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
548 { MATROSKA_ID_CLUSTER, EBML_STOP },
552 static EbmlSyntax matroska_segments[] = {
553 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
557 static EbmlSyntax matroska_blockmore[] = {
558 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
559 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
563 static EbmlSyntax matroska_blockadditions[] = {
564 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n=matroska_blockmore} },
568 static EbmlSyntax matroska_blockgroup[] = {
569 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
570 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, {.n=matroska_blockadditions} },
571 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
572 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration) },
573 { MATROSKA_ID_DISCARDPADDING, EBML_UINT, 0, offsetof(MatroskaBlock,discard_padding) },
574 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
575 { MATROSKA_ID_CODECSTATE, EBML_NONE },
576 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
580 static EbmlSyntax matroska_cluster[] = {
581 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
582 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
583 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
584 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
585 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
589 static EbmlSyntax matroska_clusters[] = {
590 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
591 { MATROSKA_ID_INFO, EBML_NONE },
592 { MATROSKA_ID_CUES, EBML_NONE },
593 { MATROSKA_ID_TAGS, EBML_NONE },
594 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
598 static EbmlSyntax matroska_cluster_incremental_parsing[] = {
599 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
600 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
601 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
602 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
603 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
604 { MATROSKA_ID_INFO, EBML_NONE },
605 { MATROSKA_ID_CUES, EBML_NONE },
606 { MATROSKA_ID_TAGS, EBML_NONE },
607 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
608 { MATROSKA_ID_CLUSTER, EBML_STOP },
612 static EbmlSyntax matroska_cluster_incremental[] = {
613 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
614 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
615 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
616 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
617 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
621 static EbmlSyntax matroska_clusters_incremental[] = {
622 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster_incremental} },
623 { MATROSKA_ID_INFO, EBML_NONE },
624 { MATROSKA_ID_CUES, EBML_NONE },
625 { MATROSKA_ID_TAGS, EBML_NONE },
626 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
630 static const char *const matroska_doctypes[] = { "matroska", "webm" };
632 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
634 AVIOContext *pb = matroska->ctx->pb;
636 matroska->current_id = 0;
637 matroska->num_levels = 0;
639 /* seek to next position to resync from */
640 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
645 // try to find a toplevel element
646 while (!url_feof(pb)) {
647 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
648 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
649 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
650 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
651 matroska->current_id = id;
654 id = (id << 8) | avio_r8(pb);
662 * Return: Whether we reached the end of a level in the hierarchy or not.
664 static int ebml_level_end(MatroskaDemuxContext *matroska)
666 AVIOContext *pb = matroska->ctx->pb;
667 int64_t pos = avio_tell(pb);
669 if (matroska->num_levels > 0) {
670 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
671 if (pos - level->start >= level->length || matroska->current_id) {
672 matroska->num_levels--;
680 * Read: an "EBML number", which is defined as a variable-length
681 * array of bytes. The first byte indicates the length by giving a
682 * number of 0-bits followed by a one. The position of the first
683 * "one" bit inside the first byte indicates the length of this
685 * Returns: number of bytes read, < 0 on error
687 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
688 int max_size, uint64_t *number)
693 /* The first byte tells us the length in bytes - avio_r8() can normally
694 * return 0, but since that's not a valid first ebmlID byte, we can
695 * use it safely here to catch EOS. */
696 if (!(total = avio_r8(pb))) {
697 /* we might encounter EOS here */
699 int64_t pos = avio_tell(pb);
700 av_log(matroska->ctx, AV_LOG_ERROR,
701 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
703 return pb->error ? pb->error : AVERROR(EIO);
708 /* get the length of the EBML number */
709 read = 8 - ff_log2_tab[total];
710 if (read > max_size) {
711 int64_t pos = avio_tell(pb) - 1;
712 av_log(matroska->ctx, AV_LOG_ERROR,
713 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
714 (uint8_t) total, pos, pos);
715 return AVERROR_INVALIDDATA;
718 /* read out length */
719 total ^= 1 << ff_log2_tab[total];
721 total = (total << 8) | avio_r8(pb);
729 * Read a EBML length value.
730 * This needs special handling for the "unknown length" case which has multiple
733 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
736 int res = ebml_read_num(matroska, pb, 8, number);
737 if (res > 0 && *number + 1 == 1ULL << (7 * res))
738 *number = 0xffffffffffffffULL;
743 * Read the next element as an unsigned int.
744 * 0 is success, < 0 is failure.
746 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
751 return AVERROR_INVALIDDATA;
753 /* big-endian ordering; build up number */
756 *num = (*num << 8) | avio_r8(pb);
762 * Read the next element as a float.
763 * 0 is success, < 0 is failure.
765 static int ebml_read_float(AVIOContext *pb, int size, double *num)
769 } else if (size == 4) {
770 *num = av_int2float(avio_rb32(pb));
771 } else if (size == 8){
772 *num = av_int2double(avio_rb64(pb));
774 return AVERROR_INVALIDDATA;
780 * Read the next element as an ASCII string.
781 * 0 is success, < 0 is failure.
783 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
787 /* EBML strings are usually not 0-terminated, so we allocate one
788 * byte more, read the string and NULL-terminate it ourselves. */
789 if (!(res = av_malloc(size + 1)))
790 return AVERROR(ENOMEM);
791 if (avio_read(pb, (uint8_t *) res, size) != size) {
803 * Read the next element as binary data.
804 * 0 is success, < 0 is failure.
806 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
808 av_fast_padded_malloc(&bin->data, &bin->size, length);
810 return AVERROR(ENOMEM);
813 bin->pos = avio_tell(pb);
814 if (avio_read(pb, bin->data, length) != length) {
815 av_freep(&bin->data);
824 * Read the next element, but only the header. The contents
825 * are supposed to be sub-elements which can be read separately.
826 * 0 is success, < 0 is failure.
828 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
830 AVIOContext *pb = matroska->ctx->pb;
831 MatroskaLevel *level;
833 if (matroska->num_levels >= EBML_MAX_DEPTH) {
834 av_log(matroska->ctx, AV_LOG_ERROR,
835 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
836 return AVERROR(ENOSYS);
839 level = &matroska->levels[matroska->num_levels++];
840 level->start = avio_tell(pb);
841 level->length = length;
847 * Read signed/unsigned "EBML" numbers.
848 * Return: number of bytes processed, < 0 on error
850 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
851 uint8_t *data, uint32_t size, uint64_t *num)
854 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
855 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
859 * Same as above, but signed.
861 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
862 uint8_t *data, uint32_t size, int64_t *num)
867 /* read as unsigned number first */
868 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
871 /* make signed (weird way) */
872 *num = unum - ((1LL << (7*res - 1)) - 1);
877 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
878 EbmlSyntax *syntax, void *data);
880 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
881 uint32_t id, void *data)
884 for (i=0; syntax[i].id; i++)
885 if (id == syntax[i].id)
887 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
888 matroska->num_levels > 0 &&
889 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
890 return 0; // we reached the end of an unknown size cluster
891 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
892 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
893 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
894 return AVERROR_INVALIDDATA;
896 return ebml_parse_elem(matroska, &syntax[i], data);
899 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
902 if (!matroska->current_id) {
904 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
907 matroska->current_id = id | 1 << 7*res;
909 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
912 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
917 for (i=0; syntax[i].id; i++)
918 switch (syntax[i].type) {
920 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
923 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
927 // the default may be NULL
928 if (syntax[i].def.s) {
929 uint8_t **dst = (uint8_t**)((uint8_t*)data + syntax[i].data_offset);
930 *dst = av_strdup(syntax[i].def.s);
932 return AVERROR(ENOMEM);
937 while (!res && !ebml_level_end(matroska))
938 res = ebml_parse(matroska, syntax, data);
943 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
944 EbmlSyntax *syntax, void *data)
946 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
949 // max. 16 MB for strings
950 [EBML_STR] = 0x1000000,
951 [EBML_UTF8] = 0x1000000,
952 // max. 256 MB for binary data
953 [EBML_BIN] = 0x10000000,
954 // no limits for anything else
956 AVIOContext *pb = matroska->ctx->pb;
957 uint32_t id = syntax->id;
962 data = (char *)data + syntax->data_offset;
963 if (syntax->list_elem_size) {
964 EbmlList *list = data;
965 newelem = av_realloc_array(list->elem, list->nb_elem+1, syntax->list_elem_size);
967 return AVERROR(ENOMEM);
968 list->elem = newelem;
969 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
970 memset(data, 0, syntax->list_elem_size);
974 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
975 matroska->current_id = 0;
976 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
978 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
979 av_log(matroska->ctx, AV_LOG_ERROR,
980 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
981 length, max_lengths[syntax->type], syntax->type);
982 return AVERROR_INVALIDDATA;
986 switch (syntax->type) {
987 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
988 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
990 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
991 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
992 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
994 if (id == MATROSKA_ID_SEGMENT)
995 matroska->segment_start = avio_tell(matroska->ctx->pb);
996 return ebml_parse_nest(matroska, syntax->def.n, data);
997 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
998 case EBML_STOP: return 1;
1000 if(ffio_limit(pb, length) != length)
1001 return AVERROR(EIO);
1002 return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
1004 if (res == AVERROR_INVALIDDATA)
1005 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1006 else if (res == AVERROR(EIO))
1007 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1011 static void ebml_free(EbmlSyntax *syntax, void *data)
1014 for (i=0; syntax[i].id; i++) {
1015 void *data_off = (char *)data + syntax[i].data_offset;
1016 switch (syntax[i].type) {
1018 case EBML_UTF8: av_freep(data_off); break;
1019 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
1021 if (syntax[i].list_elem_size) {
1022 EbmlList *list = data_off;
1023 char *ptr = list->elem;
1024 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
1025 ebml_free(syntax[i].def.n, ptr);
1026 av_free(list->elem);
1028 ebml_free(syntax[i].def.n, data_off);
1038 static int matroska_probe(AVProbeData *p)
1041 int len_mask = 0x80, size = 1, n = 1, i;
1044 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1047 /* length of header */
1049 while (size <= 8 && !(total & len_mask)) {
1055 total &= (len_mask - 1);
1057 total = (total << 8) | p->buf[4 + n++];
1059 /* Does the probe data contain the whole header? */
1060 if (p->buf_size < 4 + size + total)
1063 /* The header should contain a known document type. For now,
1064 * we don't parse the whole header but simply check for the
1065 * availability of that array of characters inside the header.
1066 * Not fully fool-proof, but good enough. */
1067 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1068 int probelen = strlen(matroska_doctypes[i]);
1069 if (total < probelen)
1071 for (n = 4+size; n <= 4+size+total-probelen; n++)
1072 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
1073 return AVPROBE_SCORE_MAX;
1076 // probably valid EBML header but no recognized doctype
1077 return AVPROBE_SCORE_EXTENSION;
1080 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1083 MatroskaTrack *tracks = matroska->tracks.elem;
1086 for (i=0; i < matroska->tracks.nb_elem; i++)
1087 if (tracks[i].num == num)
1090 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1094 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
1095 MatroskaTrack *track)
1097 MatroskaTrackEncoding *encodings = track->encodings.elem;
1098 uint8_t* data = *buf;
1099 int isize = *buf_size;
1100 uint8_t* pkt_data = NULL;
1101 uint8_t av_unused *newpktdata;
1102 int pkt_size = isize;
1106 if (pkt_size >= 10000000U)
1107 return AVERROR_INVALIDDATA;
1109 switch (encodings[0].compression.algo) {
1110 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: {
1111 int header_size = encodings[0].compression.settings.size;
1112 uint8_t *header = encodings[0].compression.settings.data;
1114 if (header_size && !header) {
1115 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1122 pkt_size = isize + header_size;
1123 pkt_data = av_malloc(pkt_size);
1125 return AVERROR(ENOMEM);
1127 memcpy(pkt_data, header, header_size);
1128 memcpy(pkt_data + header_size, data, isize);
1132 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1134 olen = pkt_size *= 3;
1135 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1137 result = AVERROR(ENOMEM);
1140 pkt_data = newpktdata;
1141 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1142 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
1144 result = AVERROR_INVALIDDATA;
1151 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
1152 z_stream zstream = {0};
1153 if (inflateInit(&zstream) != Z_OK)
1155 zstream.next_in = data;
1156 zstream.avail_in = isize;
1159 newpktdata = av_realloc(pkt_data, pkt_size);
1161 inflateEnd(&zstream);
1164 pkt_data = newpktdata;
1165 zstream.avail_out = pkt_size - zstream.total_out;
1166 zstream.next_out = pkt_data + zstream.total_out;
1168 result = inflate(&zstream, Z_NO_FLUSH);
1170 result = Z_MEM_ERROR;
1171 } while (result==Z_OK && pkt_size<10000000);
1172 pkt_size = zstream.total_out;
1173 inflateEnd(&zstream);
1174 if (result != Z_STREAM_END) {
1175 if (result == Z_MEM_ERROR)
1176 result = AVERROR(ENOMEM);
1178 result = AVERROR_INVALIDDATA;
1185 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
1186 bz_stream bzstream = {0};
1187 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1189 bzstream.next_in = data;
1190 bzstream.avail_in = isize;
1193 newpktdata = av_realloc(pkt_data, pkt_size);
1195 BZ2_bzDecompressEnd(&bzstream);
1198 pkt_data = newpktdata;
1199 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1200 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1202 result = BZ2_bzDecompress(&bzstream);
1204 result = BZ_MEM_ERROR;
1205 } while (result==BZ_OK && pkt_size<10000000);
1206 pkt_size = bzstream.total_out_lo32;
1207 BZ2_bzDecompressEnd(&bzstream);
1208 if (result != BZ_STREAM_END) {
1209 if (result == BZ_MEM_ERROR)
1210 result = AVERROR(ENOMEM);
1212 result = AVERROR_INVALIDDATA;
1219 return AVERROR_INVALIDDATA;
1223 *buf_size = pkt_size;
1231 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1232 AVPacket *pkt, uint64_t display_duration)
1235 char *layer, *ptr = pkt->data, *end = ptr+pkt->size;
1236 for (; *ptr!=',' && ptr<end-1; ptr++);
1240 for (; *ptr!=',' && ptr<end-1; ptr++);
1242 int64_t end_pts = pkt->pts + display_duration;
1243 int sc = matroska->time_scale * pkt->pts / 10000000;
1244 int ec = matroska->time_scale * end_pts / 10000000;
1245 int sh, sm, ss, eh, em, es, len;
1246 sh = sc/360000; sc -= 360000*sh;
1247 sm = sc/ 6000; sc -= 6000*sm;
1248 ss = sc/ 100; sc -= 100*ss;
1249 eh = ec/360000; ec -= 360000*eh;
1250 em = ec/ 6000; ec -= 6000*em;
1251 es = ec/ 100; ec -= 100*es;
1253 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1254 if (!(line = av_buffer_alloc(len)))
1256 snprintf(line->data, len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1257 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1258 av_buffer_unref(&pkt->buf);
1260 pkt->data = line->data;
1261 pkt->size = strlen(line->data);
1265 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1267 int ret = av_grow_packet(out, in->size);
1271 memcpy(out->data + out->size - in->size, in->data, in->size);
1279 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1280 AVDictionary **metadata, char *prefix)
1282 MatroskaTag *tags = list->elem;
1286 for (i=0; i < list->nb_elem; i++) {
1287 const char *lang = tags[i].lang && strcmp(tags[i].lang, "und") ?
1288 tags[i].lang : NULL;
1290 if (!tags[i].name) {
1291 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1294 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1295 else av_strlcpy(key, tags[i].name, sizeof(key));
1296 if (tags[i].def || !lang) {
1297 av_dict_set(metadata, key, tags[i].string, 0);
1298 if (tags[i].sub.nb_elem)
1299 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1302 av_strlcat(key, "-", sizeof(key));
1303 av_strlcat(key, lang, sizeof(key));
1304 av_dict_set(metadata, key, tags[i].string, 0);
1305 if (tags[i].sub.nb_elem)
1306 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1309 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1312 static void matroska_convert_tags(AVFormatContext *s)
1314 MatroskaDemuxContext *matroska = s->priv_data;
1315 MatroskaTags *tags = matroska->tags.elem;
1318 for (i=0; i < matroska->tags.nb_elem; i++) {
1319 if (tags[i].target.attachuid) {
1320 MatroskaAttachement *attachment = matroska->attachments.elem;
1321 for (j=0; j<matroska->attachments.nb_elem; j++)
1322 if (attachment[j].uid == tags[i].target.attachuid
1323 && attachment[j].stream)
1324 matroska_convert_tag(s, &tags[i].tag,
1325 &attachment[j].stream->metadata, NULL);
1326 } else if (tags[i].target.chapteruid) {
1327 MatroskaChapter *chapter = matroska->chapters.elem;
1328 for (j=0; j<matroska->chapters.nb_elem; j++)
1329 if (chapter[j].uid == tags[i].target.chapteruid
1330 && chapter[j].chapter)
1331 matroska_convert_tag(s, &tags[i].tag,
1332 &chapter[j].chapter->metadata, NULL);
1333 } else if (tags[i].target.trackuid) {
1334 MatroskaTrack *track = matroska->tracks.elem;
1335 for (j=0; j<matroska->tracks.nb_elem; j++)
1336 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1337 matroska_convert_tag(s, &tags[i].tag,
1338 &track[j].stream->metadata, NULL);
1340 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1341 tags[i].target.type);
1346 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
1348 EbmlList *seekhead_list = &matroska->seekhead;
1349 MatroskaSeekhead *seekhead = seekhead_list->elem;
1350 uint32_t level_up = matroska->level_up;
1351 int64_t before_pos = avio_tell(matroska->ctx->pb);
1352 uint32_t saved_id = matroska->current_id;
1353 MatroskaLevel level;
1357 if (idx >= seekhead_list->nb_elem
1358 || seekhead[idx].id == MATROSKA_ID_SEEKHEAD
1359 || seekhead[idx].id == MATROSKA_ID_CLUSTER)
1363 offset = seekhead[idx].pos + matroska->segment_start;
1364 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1365 /* We don't want to lose our seekhead level, so we add
1366 * a dummy. This is a crude hack. */
1367 if (matroska->num_levels == EBML_MAX_DEPTH) {
1368 av_log(matroska->ctx, AV_LOG_INFO,
1369 "Max EBML element depth (%d) reached, "
1370 "cannot parse further.\n", EBML_MAX_DEPTH);
1371 ret = AVERROR_INVALIDDATA;
1374 level.length = (uint64_t)-1;
1375 matroska->levels[matroska->num_levels] = level;
1376 matroska->num_levels++;
1377 matroska->current_id = 0;
1379 ret = ebml_parse(matroska, matroska_segment, matroska);
1381 /* remove dummy level */
1382 while (matroska->num_levels) {
1383 uint64_t length = matroska->levels[--matroska->num_levels].length;
1384 if (length == (uint64_t)-1)
1390 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1391 matroska->level_up = level_up;
1392 matroska->current_id = saved_id;
1397 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1399 EbmlList *seekhead_list = &matroska->seekhead;
1400 int64_t before_pos = avio_tell(matroska->ctx->pb);
1403 // we should not do any seeking in the streaming case
1404 if (!matroska->ctx->pb->seekable ||
1405 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1408 for (i = 0; i < seekhead_list->nb_elem; i++) {
1409 MatroskaSeekhead *seekhead = seekhead_list->elem;
1410 if (seekhead[i].pos <= before_pos)
1413 // defer cues parsing until we actually need cue data.
1414 if (seekhead[i].id == MATROSKA_ID_CUES) {
1415 matroska->cues_parsing_deferred = 1;
1419 if (matroska_parse_seekhead_entry(matroska, i) < 0) {
1420 // mark index as broken
1421 matroska->cues_parsing_deferred = -1;
1427 static void matroska_add_index_entries(MatroskaDemuxContext *matroska) {
1428 EbmlList *index_list;
1429 MatroskaIndex *index;
1430 int index_scale = 1;
1433 index_list = &matroska->index;
1434 index = index_list->elem;
1435 if (index_list->nb_elem
1436 && index[0].time > 1E14/matroska->time_scale) {
1437 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1438 index_scale = matroska->time_scale;
1440 for (i = 0; i < index_list->nb_elem; i++) {
1441 EbmlList *pos_list = &index[i].pos;
1442 MatroskaIndexPos *pos = pos_list->elem;
1443 for (j = 0; j < pos_list->nb_elem; j++) {
1444 MatroskaTrack *track = matroska_find_track_by_num(matroska, pos[j].track);
1445 if (track && track->stream)
1446 av_add_index_entry(track->stream,
1447 pos[j].pos + matroska->segment_start,
1448 index[i].time/index_scale, 0, 0,
1454 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1455 EbmlList *seekhead_list = &matroska->seekhead;
1456 MatroskaSeekhead *seekhead = seekhead_list->elem;
1459 for (i = 0; i < seekhead_list->nb_elem; i++)
1460 if (seekhead[i].id == MATROSKA_ID_CUES)
1462 av_assert1(i <= seekhead_list->nb_elem);
1464 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1465 matroska->cues_parsing_deferred = -1;
1466 matroska_add_index_entries(matroska);
1469 static int matroska_aac_profile(char *codec_id)
1471 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1474 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1475 if (strstr(codec_id, aac_profiles[profile]))
1480 static int matroska_aac_sri(int samplerate)
1484 for (sri=0; sri<FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1485 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1490 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1493 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1494 time_t creation_time = date_utc / 1000000000 + 978307200;
1495 struct tm *ptm = gmtime(&creation_time);
1497 strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
1498 av_dict_set(metadata, "creation_time", buffer, 0);
1501 static int matroska_read_header(AVFormatContext *s)
1503 MatroskaDemuxContext *matroska = s->priv_data;
1504 EbmlList *attachements_list = &matroska->attachments;
1505 MatroskaAttachement *attachements;
1506 EbmlList *chapters_list = &matroska->chapters;
1507 MatroskaChapter *chapters;
1508 MatroskaTrack *tracks;
1509 uint64_t max_start = 0;
1517 /* First read the EBML header. */
1518 if (ebml_parse(matroska, ebml_syntax, &ebml)
1519 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1520 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 3 || !ebml.doctype) {
1521 av_log(matroska->ctx, AV_LOG_ERROR,
1522 "EBML header using unsupported features\n"
1523 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1524 ebml.version, ebml.doctype, ebml.doctype_version);
1525 ebml_free(ebml_syntax, &ebml);
1526 return AVERROR_PATCHWELCOME;
1527 } else if (ebml.doctype_version == 3) {
1528 av_log(matroska->ctx, AV_LOG_WARNING,
1529 "EBML header using unsupported features\n"
1530 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1531 ebml.version, ebml.doctype, ebml.doctype_version);
1533 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1534 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1536 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1537 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1538 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1539 ebml_free(ebml_syntax, &ebml);
1540 return AVERROR_INVALIDDATA;
1543 ebml_free(ebml_syntax, &ebml);
1545 /* The next thing is a segment. */
1546 pos = avio_tell(matroska->ctx->pb);
1547 res = ebml_parse(matroska, matroska_segments, matroska);
1548 // try resyncing until we find a EBML_STOP type element.
1550 res = matroska_resync(matroska, pos);
1553 pos = avio_tell(matroska->ctx->pb);
1554 res = ebml_parse(matroska, matroska_segment, matroska);
1556 matroska_execute_seekhead(matroska);
1558 if (!matroska->time_scale)
1559 matroska->time_scale = 1000000;
1560 if (matroska->duration)
1561 matroska->ctx->duration = matroska->duration * matroska->time_scale
1562 * 1000 / AV_TIME_BASE;
1563 av_dict_set(&s->metadata, "title", matroska->title, 0);
1565 if (matroska->date_utc.size == 8)
1566 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
1568 tracks = matroska->tracks.elem;
1569 for (i=0; i < matroska->tracks.nb_elem; i++) {
1570 MatroskaTrack *track = &tracks[i];
1571 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1572 EbmlList *encodings_list = &track->encodings;
1573 MatroskaTrackEncoding *encodings = encodings_list->elem;
1574 uint8_t *extradata = NULL;
1575 int extradata_size = 0;
1576 int extradata_offset = 0;
1577 uint32_t fourcc = 0;
1579 char* key_id_base64 = NULL;
1581 /* Apply some sanity checks. */
1582 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1583 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1584 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1585 track->type != MATROSKA_TRACK_TYPE_METADATA) {
1586 av_log(matroska->ctx, AV_LOG_INFO,
1587 "Unknown or unsupported track type %"PRIu64"\n",
1591 if (track->codec_id == NULL)
1594 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1595 if (!track->default_duration && track->video.frame_rate > 0)
1596 track->default_duration = 1000000000/track->video.frame_rate;
1597 if (track->video.display_width == -1)
1598 track->video.display_width = track->video.pixel_width;
1599 if (track->video.display_height == -1)
1600 track->video.display_height = track->video.pixel_height;
1601 if (track->video.color_space.size == 4)
1602 fourcc = AV_RL32(track->video.color_space.data);
1603 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1604 if (!track->audio.out_samplerate)
1605 track->audio.out_samplerate = track->audio.samplerate;
1607 if (encodings_list->nb_elem > 1) {
1608 av_log(matroska->ctx, AV_LOG_ERROR,
1609 "Multiple combined encodings not supported");
1610 } else if (encodings_list->nb_elem == 1) {
1611 if (encodings[0].type) {
1612 if (encodings[0].encryption.key_id.size > 0) {
1613 /* Save the encryption key id to be stored later as a
1615 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1616 key_id_base64 = av_malloc(b64_size);
1617 if (key_id_base64 == NULL)
1618 return AVERROR(ENOMEM);
1620 av_base64_encode(key_id_base64, b64_size,
1621 encodings[0].encryption.key_id.data,
1622 encodings[0].encryption.key_id.size);
1624 encodings[0].scope = 0;
1625 av_log(matroska->ctx, AV_LOG_ERROR,
1626 "Unsupported encoding type");
1630 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1633 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1636 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1638 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
1639 encodings[0].scope = 0;
1640 av_log(matroska->ctx, AV_LOG_ERROR,
1641 "Unsupported encoding type");
1642 } else if (track->codec_priv.size && encodings[0].scope&2) {
1643 uint8_t *codec_priv = track->codec_priv.data;
1644 int ret = matroska_decode_buffer(&track->codec_priv.data,
1645 &track->codec_priv.size,
1648 track->codec_priv.data = NULL;
1649 track->codec_priv.size = 0;
1650 av_log(matroska->ctx, AV_LOG_ERROR,
1651 "Failed to decode codec private data\n");
1654 if (codec_priv != track->codec_priv.data)
1655 av_free(codec_priv);
1659 for(j=0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++){
1660 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1661 strlen(ff_mkv_codec_tags[j].str))){
1662 codec_id= ff_mkv_codec_tags[j].id;
1667 st = track->stream = avformat_new_stream(s, NULL);
1669 av_free(key_id_base64);
1670 return AVERROR(ENOMEM);
1673 if (key_id_base64) {
1674 /* export encryption key id as base64 metadata tag */
1675 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
1676 av_freep(&key_id_base64);
1679 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1680 && track->codec_priv.size >= 40
1681 && track->codec_priv.data != NULL) {
1682 track->ms_compat = 1;
1683 fourcc = AV_RL32(track->codec_priv.data + 16);
1684 codec_id = ff_codec_get_id(ff_codec_bmp_tags, fourcc);
1685 extradata_offset = 40;
1686 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1687 && track->codec_priv.size >= 14
1688 && track->codec_priv.data != NULL) {
1690 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1691 0, NULL, NULL, NULL, NULL);
1692 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1695 codec_id = st->codec->codec_id;
1696 extradata_offset = FFMIN(track->codec_priv.size, 18);
1697 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1698 && (track->codec_priv.size >= 86)
1699 && (track->codec_priv.data != NULL)) {
1700 fourcc = AV_RL32(track->codec_priv.data);
1701 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1702 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1703 switch (track->audio.bitdepth) {
1704 case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
1705 case 24: codec_id = AV_CODEC_ID_PCM_S24BE; break;
1706 case 32: codec_id = AV_CODEC_ID_PCM_S32BE; break;
1708 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1709 switch (track->audio.bitdepth) {
1710 case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
1711 case 24: codec_id = AV_CODEC_ID_PCM_S24LE; break;
1712 case 32: codec_id = AV_CODEC_ID_PCM_S32LE; break;
1714 } else if (codec_id==AV_CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1715 codec_id = AV_CODEC_ID_PCM_F64LE;
1716 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1717 int profile = matroska_aac_profile(track->codec_id);
1718 int sri = matroska_aac_sri(track->audio.samplerate);
1719 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1720 if (extradata == NULL)
1721 return AVERROR(ENOMEM);
1722 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1723 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1724 if (strstr(track->codec_id, "SBR")) {
1725 sri = matroska_aac_sri(track->audio.out_samplerate);
1726 extradata[2] = 0x56;
1727 extradata[3] = 0xE5;
1728 extradata[4] = 0x80 | (sri<<3);
1732 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - FF_INPUT_BUFFER_PADDING_SIZE) {
1733 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1734 Create the "atom size", "tag", and "tag version" fields the
1735 decoder expects manually. */
1736 extradata_size = 12 + track->codec_priv.size;
1737 extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1738 if (extradata == NULL)
1739 return AVERROR(ENOMEM);
1740 AV_WB32(extradata, extradata_size);
1741 memcpy(&extradata[4], "alac", 4);
1742 AV_WB32(&extradata[8], 0);
1743 memcpy(&extradata[12], track->codec_priv.data,
1744 track->codec_priv.size);
1745 } else if (codec_id == AV_CODEC_ID_TTA) {
1746 extradata_size = 30;
1747 extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1748 if (extradata == NULL)
1749 return AVERROR(ENOMEM);
1750 ffio_init_context(&b, extradata, extradata_size, 1,
1751 NULL, NULL, NULL, NULL);
1752 avio_write(&b, "TTA1", 4);
1754 avio_wl16(&b, track->audio.channels);
1755 avio_wl16(&b, track->audio.bitdepth);
1756 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
1757 return AVERROR_INVALIDDATA;
1758 avio_wl32(&b, track->audio.out_samplerate);
1759 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale), track->audio.out_samplerate, AV_TIME_BASE * 1000));
1760 } else if (codec_id == AV_CODEC_ID_RV10 || codec_id == AV_CODEC_ID_RV20 ||
1761 codec_id == AV_CODEC_ID_RV30 || codec_id == AV_CODEC_ID_RV40) {
1762 extradata_offset = 26;
1763 } else if (codec_id == AV_CODEC_ID_RA_144) {
1764 track->audio.out_samplerate = 8000;
1765 track->audio.channels = 1;
1766 } else if ((codec_id == AV_CODEC_ID_RA_288 || codec_id == AV_CODEC_ID_COOK ||
1767 codec_id == AV_CODEC_ID_ATRAC3 || codec_id == AV_CODEC_ID_SIPR)
1768 && track->codec_priv.data) {
1771 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
1772 0, NULL, NULL, NULL, NULL);
1774 flavor = avio_rb16(&b);
1775 track->audio.coded_framesize = avio_rb32(&b);
1777 track->audio.sub_packet_h = avio_rb16(&b);
1778 track->audio.frame_size = avio_rb16(&b);
1779 track->audio.sub_packet_size = avio_rb16(&b);
1780 if (flavor <= 0 || track->audio.coded_framesize <= 0 ||
1781 track->audio.sub_packet_h <= 0 || track->audio.frame_size <= 0 ||
1782 track->audio.sub_packet_size <= 0)
1783 return AVERROR_INVALIDDATA;
1784 track->audio.buf = av_malloc_array(track->audio.sub_packet_h, track->audio.frame_size);
1785 if (!track->audio.buf)
1786 return AVERROR(ENOMEM);
1787 if (codec_id == AV_CODEC_ID_RA_288) {
1788 st->codec->block_align = track->audio.coded_framesize;
1789 track->codec_priv.size = 0;
1791 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1792 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1793 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1794 st->codec->bit_rate = sipr_bit_rate[flavor];
1796 st->codec->block_align = track->audio.sub_packet_size;
1797 extradata_offset = 78;
1800 track->codec_priv.size -= extradata_offset;
1802 if (codec_id == AV_CODEC_ID_NONE)
1803 av_log(matroska->ctx, AV_LOG_INFO,
1804 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1806 if (track->time_scale < 0.01)
1807 track->time_scale = 1.0;
1808 avpriv_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1810 st->codec->codec_id = codec_id;
1812 if (strcmp(track->language, "und"))
1813 av_dict_set(&st->metadata, "language", track->language, 0);
1814 av_dict_set(&st->metadata, "title", track->name, 0);
1816 if (track->flag_default)
1817 st->disposition |= AV_DISPOSITION_DEFAULT;
1818 if (track->flag_forced)
1819 st->disposition |= AV_DISPOSITION_FORCED;
1821 if (!st->codec->extradata) {
1823 st->codec->extradata = extradata;
1824 st->codec->extradata_size = extradata_size;
1825 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1826 if (ff_alloc_extradata(st->codec, track->codec_priv.size))
1827 return AVERROR(ENOMEM);
1828 memcpy(st->codec->extradata,
1829 track->codec_priv.data + extradata_offset,
1830 track->codec_priv.size);
1834 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1835 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
1837 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1838 st->codec->codec_tag = fourcc;
1839 st->codec->width = track->video.pixel_width;
1840 st->codec->height = track->video.pixel_height;
1841 av_reduce(&st->sample_aspect_ratio.num,
1842 &st->sample_aspect_ratio.den,
1843 st->codec->height * track->video.display_width,
1844 st->codec-> width * track->video.display_height,
1846 if (st->codec->codec_id != AV_CODEC_ID_HEVC)
1847 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1848 if (track->default_duration) {
1849 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1850 1000000000, track->default_duration, 30000);
1851 #if FF_API_R_FRAME_RATE
1852 if (st->avg_frame_rate.num < st->avg_frame_rate.den * 1000L)
1853 st->r_frame_rate = st->avg_frame_rate;
1857 /* export stereo mode flag as metadata tag */
1858 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREO_MODE_COUNT)
1859 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
1861 /* export alpha mode flag as metadata tag */
1862 if (track->video.alpha_mode)
1863 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
1865 /* if we have virtual track, mark the real tracks */
1866 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
1868 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
1870 snprintf(buf, sizeof(buf), "%s_%d",
1871 ff_matroska_video_stereo_plane[planes[j].type], i);
1872 for (k=0; k < matroska->tracks.nb_elem; k++)
1873 if (planes[j].uid == tracks[k].uid) {
1874 av_dict_set(&s->streams[k]->metadata,
1875 "stereo_mode", buf, 0);
1879 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1880 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1881 st->codec->sample_rate = track->audio.out_samplerate;
1882 st->codec->channels = track->audio.channels;
1883 st->codec->bits_per_coded_sample = track->audio.bitdepth;
1884 if (st->codec->codec_id != AV_CODEC_ID_AAC)
1885 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1886 if (track->codec_delay > 0) {
1887 st->codec->delay = av_rescale_q(track->codec_delay,
1888 (AVRational){1, 1000000000},
1889 (AVRational){1, st->codec->sample_rate});
1891 if (track->seek_preroll > 0) {
1892 av_codec_set_seek_preroll(st->codec,
1893 av_rescale_q(track->seek_preroll,
1894 (AVRational){1, 1000000000},
1895 (AVRational){1, st->codec->sample_rate}));
1897 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
1898 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1900 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
1901 st->disposition |= AV_DISPOSITION_CAPTIONS;
1902 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
1903 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1904 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
1905 st->disposition |= AV_DISPOSITION_METADATA;
1907 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1908 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1910 if (st->codec->codec_id == AV_CODEC_ID_SSA ||
1911 st->codec->codec_id == AV_CODEC_ID_ASS)
1913 if (st->codec->codec_id == AV_CODEC_ID_ASS)
1915 matroska->contains_ssa = 1;
1919 attachements = attachements_list->elem;
1920 for (j=0; j<attachements_list->nb_elem; j++) {
1921 if (!(attachements[j].filename && attachements[j].mime &&
1922 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1923 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1925 AVStream *st = avformat_new_stream(s, NULL);
1928 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
1929 av_dict_set(&st->metadata, "mimetype", attachements[j].mime, 0);
1930 st->codec->codec_id = AV_CODEC_ID_NONE;
1931 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1932 if (ff_alloc_extradata(st->codec, attachements[j].bin.size))
1934 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1936 for (i=0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1937 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1938 strlen(ff_mkv_mime_tags[i].str))) {
1939 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1943 attachements[j].stream = st;
1947 chapters = chapters_list->elem;
1948 for (i=0; i<chapters_list->nb_elem; i++)
1949 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1950 && (max_start==0 || chapters[i].start > max_start)) {
1951 chapters[i].chapter =
1952 avpriv_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1953 chapters[i].start, chapters[i].end,
1955 av_dict_set(&chapters[i].chapter->metadata,
1956 "title", chapters[i].title, 0);
1957 max_start = chapters[i].start;
1960 matroska_add_index_entries(matroska);
1962 matroska_convert_tags(s);
1968 * Put one packet in an application-supplied AVPacket struct.
1969 * Returns 0 on success or -1 on failure.
1971 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1974 if (matroska->num_packets > 0) {
1975 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1976 av_free(matroska->packets[0]);
1977 if (matroska->num_packets > 1) {
1979 memmove(&matroska->packets[0], &matroska->packets[1],
1980 (matroska->num_packets - 1) * sizeof(AVPacket *));
1981 newpackets = av_realloc(matroska->packets,
1982 (matroska->num_packets - 1) * sizeof(AVPacket *));
1984 matroska->packets = newpackets;
1986 av_freep(&matroska->packets);
1987 matroska->prev_pkt = NULL;
1989 matroska->num_packets--;
1997 * Free all packets in our internal queue.
1999 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2001 matroska->prev_pkt = NULL;
2002 if (matroska->packets) {
2004 for (n = 0; n < matroska->num_packets; n++) {
2005 av_free_packet(matroska->packets[n]);
2006 av_free(matroska->packets[n]);
2008 av_freep(&matroska->packets);
2009 matroska->num_packets = 0;
2013 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2014 int* buf_size, int type,
2015 uint32_t **lace_buf, int *laces)
2017 int res = 0, n, size = *buf_size;
2018 uint8_t *data = *buf;
2019 uint32_t *lace_size;
2023 *lace_buf = av_mallocz(sizeof(int));
2025 return AVERROR(ENOMEM);
2027 *lace_buf[0] = size;
2031 av_assert0(size > 0);
2035 lace_size = av_mallocz(*laces * sizeof(int));
2037 return AVERROR(ENOMEM);
2040 case 0x1: /* Xiph lacing */ {
2043 for (n = 0; res == 0 && n < *laces - 1; n++) {
2045 if (size <= total) {
2046 res = AVERROR_INVALIDDATA;
2051 lace_size[n] += temp;
2058 if (size <= total) {
2059 res = AVERROR_INVALIDDATA;
2063 lace_size[n] = size - total;
2067 case 0x2: /* fixed-size lacing */
2068 if (size % (*laces)) {
2069 res = AVERROR_INVALIDDATA;
2072 for (n = 0; n < *laces; n++)
2073 lace_size[n] = size / *laces;
2076 case 0x3: /* EBML lacing */ {
2079 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2080 if (n < 0 || num > INT_MAX) {
2081 av_log(matroska->ctx, AV_LOG_INFO,
2082 "EBML block data error\n");
2083 res = n<0 ? n : AVERROR_INVALIDDATA;
2088 total = lace_size[0] = num;
2089 for (n = 1; res == 0 && n < *laces - 1; n++) {
2092 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2093 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2094 av_log(matroska->ctx, AV_LOG_INFO,
2095 "EBML block data error\n");
2096 res = r<0 ? r : AVERROR_INVALIDDATA;
2101 lace_size[n] = lace_size[n - 1] + snum;
2102 total += lace_size[n];
2104 if (size <= total) {
2105 res = AVERROR_INVALIDDATA;
2108 lace_size[*laces - 1] = size - total;
2114 *lace_buf = lace_size;
2120 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2121 MatroskaTrack *track,
2123 uint8_t *data, int size,
2127 int a = st->codec->block_align;
2128 int sps = track->audio.sub_packet_size;
2129 int cfs = track->audio.coded_framesize;
2130 int h = track->audio.sub_packet_h;
2131 int y = track->audio.sub_packet_cnt;
2132 int w = track->audio.frame_size;
2135 if (!track->audio.pkt_cnt) {
2136 if (track->audio.sub_packet_cnt == 0)
2137 track->audio.buf_timecode = timecode;
2138 if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2139 if (size < cfs * h / 2) {
2140 av_log(matroska->ctx, AV_LOG_ERROR,
2141 "Corrupt int4 RM-style audio packet size\n");
2142 return AVERROR_INVALIDDATA;
2144 for (x=0; x<h/2; x++)
2145 memcpy(track->audio.buf+x*2*w+y*cfs,
2147 } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2149 av_log(matroska->ctx, AV_LOG_ERROR,
2150 "Corrupt sipr RM-style audio packet size\n");
2151 return AVERROR_INVALIDDATA;
2153 memcpy(track->audio.buf + y*w, data, w);
2155 if (size < sps * w / sps || h<=0) {
2156 av_log(matroska->ctx, AV_LOG_ERROR,
2157 "Corrupt generic RM-style audio packet size\n");
2158 return AVERROR_INVALIDDATA;
2160 for (x=0; x<w/sps; x++)
2161 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
2164 if (++track->audio.sub_packet_cnt >= h) {
2165 if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2166 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2167 track->audio.sub_packet_cnt = 0;
2168 track->audio.pkt_cnt = h*w / a;
2172 while (track->audio.pkt_cnt) {
2173 AVPacket *pkt = NULL;
2174 if (!(pkt = av_mallocz(sizeof(AVPacket))) || av_new_packet(pkt, a) < 0){
2176 return AVERROR(ENOMEM);
2178 memcpy(pkt->data, track->audio.buf
2179 + a * (h*w / a - track->audio.pkt_cnt--), a);
2180 pkt->pts = track->audio.buf_timecode;
2181 track->audio.buf_timecode = AV_NOPTS_VALUE;
2183 pkt->stream_index = st->index;
2184 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
2190 /* reconstruct full wavpack blocks from mangled matroska ones */
2191 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2192 uint8_t **pdst, int *size)
2194 uint8_t *dst = NULL;
2199 int ret, offset = 0;
2201 if (srclen < 12 || track->stream->codec->extradata_size < 2)
2202 return AVERROR_INVALIDDATA;
2204 ver = AV_RL16(track->stream->codec->extradata);
2206 samples = AV_RL32(src);
2210 while (srclen >= 8) {
2215 uint32_t flags = AV_RL32(src);
2216 uint32_t crc = AV_RL32(src + 4);
2220 multiblock = (flags & 0x1800) != 0x1800;
2223 ret = AVERROR_INVALIDDATA;
2226 blocksize = AV_RL32(src);
2232 if (blocksize > srclen) {
2233 ret = AVERROR_INVALIDDATA;
2237 tmp = av_realloc(dst, dstlen + blocksize + 32);
2239 ret = AVERROR(ENOMEM);
2243 dstlen += blocksize + 32;
2245 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2246 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2247 AV_WL16(dst + offset + 8, ver); // version
2248 AV_WL16(dst + offset + 10, 0); // track/index_no
2249 AV_WL32(dst + offset + 12, 0); // total samples
2250 AV_WL32(dst + offset + 16, 0); // block index
2251 AV_WL32(dst + offset + 20, samples); // number of samples
2252 AV_WL32(dst + offset + 24, flags); // flags
2253 AV_WL32(dst + offset + 28, crc); // crc
2254 memcpy (dst + offset + 32, src, blocksize); // block data
2257 srclen -= blocksize;
2258 offset += blocksize + 32;
2271 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
2272 MatroskaTrack *track,
2274 uint8_t *data, int data_len,
2280 uint8_t *id, *settings, *text, *buf;
2281 int id_len, settings_len, text_len;
2286 return AVERROR_INVALIDDATA;
2289 q = data + data_len;
2294 if (*p == '\r' || *p == '\n') {
2303 if (p >= q || *p != '\n')
2304 return AVERROR_INVALIDDATA;
2310 if (*p == '\r' || *p == '\n') {
2311 settings_len = p - settings;
2319 if (p >= q || *p != '\n')
2320 return AVERROR_INVALIDDATA;
2325 while (text_len > 0) {
2326 const int len = text_len - 1;
2327 const uint8_t c = p[len];
2328 if (c != '\r' && c != '\n')
2334 return AVERROR_INVALIDDATA;
2336 pkt = av_mallocz(sizeof(*pkt));
2337 err = av_new_packet(pkt, text_len);
2340 return AVERROR(err);
2343 memcpy(pkt->data, text, text_len);
2346 buf = av_packet_new_side_data(pkt,
2347 AV_PKT_DATA_WEBVTT_IDENTIFIER,
2351 return AVERROR(ENOMEM);
2353 memcpy(buf, id, id_len);
2356 if (settings_len > 0) {
2357 buf = av_packet_new_side_data(pkt,
2358 AV_PKT_DATA_WEBVTT_SETTINGS,
2362 return AVERROR(ENOMEM);
2364 memcpy(buf, settings, settings_len);
2367 // Do we need this for subtitles?
2368 // pkt->flags = AV_PKT_FLAG_KEY;
2370 pkt->stream_index = st->index;
2371 pkt->pts = timecode;
2373 // Do we need this for subtitles?
2374 // pkt->dts = timecode;
2376 pkt->duration = duration;
2379 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2380 matroska->prev_pkt = pkt;
2385 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2386 MatroskaTrack *track,
2388 uint8_t *data, int pkt_size,
2389 uint64_t timecode, uint64_t lace_duration,
2390 int64_t pos, int is_keyframe,
2391 uint8_t *additional, uint64_t additional_id, int additional_size,
2392 uint64_t discard_padding)
2394 MatroskaTrackEncoding *encodings = track->encodings.elem;
2395 uint8_t *pkt_data = data;
2396 int offset = 0, res;
2399 if (encodings && !encodings->type && encodings->scope & 1) {
2400 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2405 if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2407 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2409 av_log(matroska->ctx, AV_LOG_ERROR, "Error parsing a wavpack block.\n");
2412 if (pkt_data != data)
2413 av_freep(&pkt_data);
2417 if (st->codec->codec_id == AV_CODEC_ID_PRORES)
2420 pkt = av_mallocz(sizeof(AVPacket));
2421 /* XXX: prevent data copy... */
2422 if (av_new_packet(pkt, pkt_size + offset) < 0) {
2424 res = AVERROR(ENOMEM);
2428 if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
2429 uint8_t *buf = pkt->data;
2430 bytestream_put_be32(&buf, pkt_size);
2431 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2434 memcpy(pkt->data + offset, pkt_data, pkt_size);
2436 if (pkt_data != data)
2437 av_freep(&pkt_data);
2439 pkt->flags = is_keyframe;
2440 pkt->stream_index = st->index;
2442 if (additional_size > 0) {
2443 uint8_t *side_data = av_packet_new_side_data(pkt,
2444 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2445 additional_size + 8);
2446 if(side_data == NULL) {
2447 av_free_packet(pkt);
2449 return AVERROR(ENOMEM);
2451 AV_WB64(side_data, additional_id);
2452 memcpy(side_data + 8, additional, additional_size);
2455 if (discard_padding) {
2456 uint8_t *side_data = av_packet_new_side_data(pkt,
2457 AV_PKT_DATA_SKIP_SAMPLES,
2459 if(side_data == NULL) {
2460 av_free_packet(pkt);
2462 return AVERROR(ENOMEM);
2464 AV_WL32(side_data, 0);
2465 AV_WL32(side_data + 4, av_rescale_q(discard_padding,
2466 (AVRational){1, 1000000000},
2467 (AVRational){1, st->codec->sample_rate}));
2470 if (track->ms_compat)
2471 pkt->dts = timecode;
2473 pkt->pts = timecode;
2475 if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
2477 * For backward compatibility.
2478 * Historically, we have put subtitle duration
2479 * in convergence_duration, on the off chance
2480 * that the time_scale is less than 1us, which
2481 * could result in a 32bit overflow on the
2482 * normal duration field.
2484 pkt->convergence_duration = lace_duration;
2487 if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE ||
2488 lace_duration <= INT_MAX) {
2490 * For non subtitle tracks, just store the duration
2493 * If it's a subtitle track and duration value does
2494 * not overflow a uint32, then also store it normally.
2496 pkt->duration = lace_duration;
2500 if (st->codec->codec_id == AV_CODEC_ID_SSA)
2501 matroska_fix_ass_packet(matroska, pkt, lace_duration);
2503 if (matroska->prev_pkt &&
2504 timecode != AV_NOPTS_VALUE &&
2505 matroska->prev_pkt->pts == timecode &&
2506 matroska->prev_pkt->stream_index == st->index &&
2507 st->codec->codec_id == AV_CODEC_ID_SSA)
2508 matroska_merge_packets(matroska->prev_pkt, pkt);
2510 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
2511 matroska->prev_pkt = pkt;
2514 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2515 matroska->prev_pkt = pkt;
2520 if (pkt_data != data)
2521 av_freep(&pkt_data);
2525 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2526 int size, int64_t pos, uint64_t cluster_time,
2527 uint64_t block_duration, int is_keyframe,
2528 uint8_t *additional, uint64_t additional_id, int additional_size,
2529 int64_t cluster_pos, uint64_t discard_padding)
2531 uint64_t timecode = AV_NOPTS_VALUE;
2532 MatroskaTrack *track;
2536 uint32_t *lace_size = NULL;
2537 int n, flags, laces = 0;
2539 int trust_default_duration = 1;
2541 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2542 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2548 track = matroska_find_track_by_num(matroska, num);
2549 if (!track || !track->stream) {
2550 av_log(matroska->ctx, AV_LOG_INFO,
2551 "Invalid stream %"PRIu64" or size %u\n", num, size);
2552 return AVERROR_INVALIDDATA;
2553 } else if (size <= 3)
2556 if (st->discard >= AVDISCARD_ALL)
2558 av_assert1(block_duration != AV_NOPTS_VALUE);
2560 block_time = sign_extend(AV_RB16(data), 16);
2564 if (is_keyframe == -1)
2565 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2567 if (cluster_time != (uint64_t)-1
2568 && (block_time >= 0 || cluster_time >= -block_time)) {
2569 timecode = cluster_time + block_time;
2570 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
2571 && timecode < track->end_timecode)
2572 is_keyframe = 0; /* overlapping subtitles are not key frame */
2574 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
2577 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2578 if (timecode < matroska->skip_to_timecode)
2581 matroska->skip_to_keyframe = 0;
2582 else if (!st->skip_to_keyframe) {
2583 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
2584 matroska->skip_to_keyframe = 0;
2588 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2589 &lace_size, &laces);
2594 if (track->audio.samplerate == 8000) {
2595 // If this is needed for more codecs, then add them here
2596 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
2597 if(track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
2598 trust_default_duration = 0;
2602 if (!block_duration && trust_default_duration)
2603 block_duration = track->default_duration * laces / matroska->time_scale;
2605 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
2606 track->end_timecode =
2607 FFMAX(track->end_timecode, timecode + block_duration);
2609 for (n = 0; n < laces; n++) {
2610 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
2612 if (lace_size[n] > size) {
2613 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
2617 if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2618 st->codec->codec_id == AV_CODEC_ID_COOK ||
2619 st->codec->codec_id == AV_CODEC_ID_SIPR ||
2620 st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2621 st->codec->block_align && track->audio.sub_packet_size) {
2623 res = matroska_parse_rm_audio(matroska, track, st, data,
2629 } else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
2630 res = matroska_parse_webvtt(matroska, track, st,
2632 timecode, lace_duration,
2638 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2639 timecode, lace_duration,
2640 pos, !n? is_keyframe : 0,
2641 additional, additional_id, additional_size,
2647 if (timecode != AV_NOPTS_VALUE)
2648 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
2649 data += lace_size[n];
2650 size -= lace_size[n];
2658 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2660 EbmlList *blocks_list;
2661 MatroskaBlock *blocks;
2663 res = ebml_parse(matroska,
2664 matroska_cluster_incremental_parsing,
2665 &matroska->current_cluster);
2668 if (matroska->current_cluster_pos)
2669 ebml_level_end(matroska);
2670 ebml_free(matroska_cluster, &matroska->current_cluster);
2671 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2672 matroska->current_cluster_num_blocks = 0;
2673 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2674 matroska->prev_pkt = NULL;
2675 /* sizeof the ID which was already read */
2676 if (matroska->current_id)
2677 matroska->current_cluster_pos -= 4;
2678 res = ebml_parse(matroska,
2679 matroska_clusters_incremental,
2680 &matroska->current_cluster);
2681 /* Try parsing the block again. */
2683 res = ebml_parse(matroska,
2684 matroska_cluster_incremental_parsing,
2685 &matroska->current_cluster);
2689 matroska->current_cluster_num_blocks <
2690 matroska->current_cluster.blocks.nb_elem) {
2691 blocks_list = &matroska->current_cluster.blocks;
2692 blocks = blocks_list->elem;
2694 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2695 i = blocks_list->nb_elem - 1;
2696 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2697 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2698 uint8_t* additional = blocks[i].additional.size > 0 ?
2699 blocks[i].additional.data : NULL;
2700 if (!blocks[i].non_simple)
2701 blocks[i].duration = 0;
2702 res = matroska_parse_block(matroska,
2703 blocks[i].bin.data, blocks[i].bin.size,
2705 matroska->current_cluster.timecode,
2706 blocks[i].duration, is_keyframe,
2707 additional, blocks[i].additional_id,
2708 blocks[i].additional.size,
2709 matroska->current_cluster_pos,
2710 blocks[i].discard_padding);
2717 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2719 MatroskaCluster cluster = { 0 };
2720 EbmlList *blocks_list;
2721 MatroskaBlock *blocks;
2724 if (!matroska->contains_ssa)
2725 return matroska_parse_cluster_incremental(matroska);
2726 pos = avio_tell(matroska->ctx->pb);
2727 matroska->prev_pkt = NULL;
2728 if (matroska->current_id)
2729 pos -= 4; /* sizeof the ID which was already read */
2730 res = ebml_parse(matroska, matroska_clusters, &cluster);
2731 blocks_list = &cluster.blocks;
2732 blocks = blocks_list->elem;
2733 for (i=0; i<blocks_list->nb_elem; i++)
2734 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2735 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2736 res=matroska_parse_block(matroska,
2737 blocks[i].bin.data, blocks[i].bin.size,
2738 blocks[i].bin.pos, cluster.timecode,
2739 blocks[i].duration, is_keyframe, NULL, 0, 0,
2740 pos, blocks[i].discard_padding);
2742 ebml_free(matroska_cluster, &cluster);
2746 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2748 MatroskaDemuxContext *matroska = s->priv_data;
2750 while (matroska_deliver_packet(matroska, pkt)) {
2751 int64_t pos = avio_tell(matroska->ctx->pb);
2754 if (matroska_parse_cluster(matroska) < 0)
2755 matroska_resync(matroska, pos);
2761 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2762 int64_t timestamp, int flags)
2764 MatroskaDemuxContext *matroska = s->priv_data;
2765 MatroskaTrack *tracks = matroska->tracks.elem;
2766 AVStream *st = s->streams[stream_index];
2767 int i, index, index_sub, index_min;
2769 /* Parse the CUES now since we need the index data to seek. */
2770 if (matroska->cues_parsing_deferred > 0) {
2771 matroska->cues_parsing_deferred = 0;
2772 matroska_parse_cues(matroska);
2775 if (!st->nb_index_entries)
2777 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2779 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2780 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
2781 matroska->current_id = 0;
2782 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2783 matroska_clear_queue(matroska);
2784 if (matroska_parse_cluster(matroska) < 0)
2789 matroska_clear_queue(matroska);
2790 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
2794 for (i=0; i < matroska->tracks.nb_elem; i++) {
2795 tracks[i].audio.pkt_cnt = 0;
2796 tracks[i].audio.sub_packet_cnt = 0;
2797 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2798 tracks[i].end_timecode = 0;
2799 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
2800 && tracks[i].stream->discard != AVDISCARD_ALL) {
2801 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
2802 while(index_sub >= 0
2804 && tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos
2805 && st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
2810 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2811 matroska->current_id = 0;
2812 if (flags & AVSEEK_FLAG_ANY) {
2813 st->skip_to_keyframe = 0;
2814 matroska->skip_to_timecode = timestamp;
2816 st->skip_to_keyframe = 1;
2817 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2819 matroska->skip_to_keyframe = 1;
2821 matroska->num_levels = 0;
2822 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2825 // slightly hackish but allows proper fallback to
2826 // the generic seeking code.
2827 matroska_clear_queue(matroska);
2828 matroska->current_id = 0;
2829 st->skip_to_keyframe =
2830 matroska->skip_to_keyframe = 0;
2832 matroska->num_levels = 0;
2836 static int matroska_read_close(AVFormatContext *s)
2838 MatroskaDemuxContext *matroska = s->priv_data;
2839 MatroskaTrack *tracks = matroska->tracks.elem;
2842 matroska_clear_queue(matroska);
2844 for (n=0; n < matroska->tracks.nb_elem; n++)
2845 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2846 av_free(tracks[n].audio.buf);
2847 ebml_free(matroska_cluster, &matroska->current_cluster);
2848 ebml_free(matroska_segment, matroska);
2853 AVInputFormat ff_matroska_demuxer = {
2854 .name = "matroska,webm",
2855 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2856 .priv_data_size = sizeof(MatroskaDemuxContext),
2857 .read_probe = matroska_probe,
2858 .read_header = matroska_read_header,
2859 .read_packet = matroska_read_packet,
2860 .read_close = matroska_read_close,
2861 .read_seek = matroska_read_seek,