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/
42 #include "libavutil/avstring.h"
43 #include "libavutil/base64.h"
44 #include "libavutil/dict.h"
45 #include "libavutil/intfloat.h"
46 #include "libavutil/intreadwrite.h"
47 #include "libavutil/lzo.h"
49 #include "libavcodec/bytestream.h"
50 #include "libavcodec/mpeg4audio.h"
53 #include "avio_internal.h"
57 /* For ff_codec_get_id(). */
75 typedef const struct EbmlSyntax {
84 const struct EbmlSyntax *n;
104 uint64_t doctype_version;
110 } MatroskaTrackCompression;
115 } MatroskaTrackEncryption;
120 MatroskaTrackCompression compression;
121 MatroskaTrackEncryption encryption;
122 } MatroskaTrackEncoding;
126 uint64_t display_width;
127 uint64_t display_height;
128 uint64_t pixel_width;
129 uint64_t pixel_height;
131 uint64_t stereo_mode;
133 } MatroskaTrackVideo;
137 double out_samplerate;
141 /* real audio header (extracted from extradata) */
148 uint64_t buf_timecode;
150 } MatroskaTrackAudio;
155 } MatroskaTrackPlane;
158 EbmlList combine_planes;
159 } MatroskaTrackOperation;
170 uint64_t default_duration;
171 uint64_t flag_default;
172 uint64_t flag_forced;
173 uint64_t codec_delay;
174 uint64_t seek_preroll;
175 MatroskaTrackVideo video;
176 MatroskaTrackAudio audio;
177 MatroskaTrackOperation operation;
181 int64_t end_timecode;
183 uint64_t max_block_additional_id;
193 } MatroskaAttachment;
231 MatroskaTagTarget target;
251 AVFormatContext *ctx;
255 MatroskaLevel levels[EBML_MAX_DEPTH];
265 EbmlList attachments;
271 /* byte position of the segment inside the stream */
272 int64_t segment_start;
274 /* the packet queue */
281 /* What to skip before effectively reading a packet. */
282 int skip_to_keyframe;
283 uint64_t skip_to_timecode;
285 /* File has a CUES element, but we defer parsing until it is needed. */
286 int cues_parsing_deferred;
288 int current_cluster_num_blocks;
289 int64_t current_cluster_pos;
290 MatroskaCluster current_cluster;
292 /* File has SSA subtitles which prevent incremental cluster parsing. */
294 } MatroskaDemuxContext;
301 uint64_t additional_id;
303 int64_t discard_padding;
306 static EbmlSyntax ebml_header[] = {
307 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
308 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
309 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
310 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
311 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
312 { EBML_ID_EBMLVERSION, EBML_NONE },
313 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
317 static EbmlSyntax ebml_syntax[] = {
318 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
322 static EbmlSyntax matroska_info[] = {
323 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
324 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
325 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
326 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
327 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
328 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
329 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
333 static EbmlSyntax matroska_track_video[] = {
334 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
335 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
336 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
337 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
338 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
339 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
340 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode) },
341 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
342 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
343 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
344 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
345 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
346 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
347 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_NONE },
348 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
352 static EbmlSyntax matroska_track_audio[] = {
353 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
354 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
355 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
356 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
360 static EbmlSyntax matroska_track_encoding_compression[] = {
361 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
362 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
366 static EbmlSyntax matroska_track_encoding_encryption[] = {
367 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
368 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
369 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
370 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
371 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
372 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
373 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
376 static EbmlSyntax matroska_track_encoding[] = {
377 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
378 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
379 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
380 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
381 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
385 static EbmlSyntax matroska_track_encodings[] = {
386 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
390 static EbmlSyntax matroska_track_plane[] = {
391 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
392 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
396 static EbmlSyntax matroska_track_combine_planes[] = {
397 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
401 static EbmlSyntax matroska_track_operation[] = {
402 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
406 static EbmlSyntax matroska_track[] = {
407 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
408 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
409 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
410 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
411 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
412 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
413 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
414 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
415 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
416 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
417 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
418 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
419 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
420 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
421 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
422 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
423 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
424 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
425 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
426 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
427 { MATROSKA_ID_CODECNAME, EBML_NONE },
428 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
429 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
430 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
431 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
432 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
436 static EbmlSyntax matroska_tracks[] = {
437 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
441 static EbmlSyntax matroska_attachment[] = {
442 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
443 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
444 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
445 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
446 { MATROSKA_ID_FILEDESC, EBML_NONE },
450 static EbmlSyntax matroska_attachments[] = {
451 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
455 static EbmlSyntax matroska_chapter_display[] = {
456 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
457 { MATROSKA_ID_CHAPLANG, EBML_NONE },
461 static EbmlSyntax matroska_chapter_entry[] = {
462 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
463 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
464 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
465 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
466 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
467 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
468 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
469 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
473 static EbmlSyntax matroska_chapter[] = {
474 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
475 { MATROSKA_ID_EDITIONUID, EBML_NONE },
476 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
477 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
478 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
482 static EbmlSyntax matroska_chapters[] = {
483 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
487 static EbmlSyntax matroska_index_pos[] = {
488 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
489 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
490 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
491 { MATROSKA_ID_CUEDURATION, EBML_NONE },
492 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
496 static EbmlSyntax matroska_index_entry[] = {
497 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
498 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
502 static EbmlSyntax matroska_index[] = {
503 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
507 static EbmlSyntax matroska_simpletag[] = {
508 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
509 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
510 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
511 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
512 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
513 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
517 static EbmlSyntax matroska_tagtargets[] = {
518 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
519 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
520 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
521 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
522 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
526 static EbmlSyntax matroska_tag[] = {
527 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
528 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
532 static EbmlSyntax matroska_tags[] = {
533 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
537 static EbmlSyntax matroska_seekhead_entry[] = {
538 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
539 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
543 static EbmlSyntax matroska_seekhead[] = {
544 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
548 static EbmlSyntax matroska_segment[] = {
549 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, { .n = matroska_info } },
550 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, { .n = matroska_tracks } },
551 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, { .n = matroska_attachments } },
552 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, { .n = matroska_chapters } },
553 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, { .n = matroska_index } },
554 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, { .n = matroska_tags } },
555 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, { .n = matroska_seekhead } },
556 { MATROSKA_ID_CLUSTER, EBML_STOP },
560 static EbmlSyntax matroska_segments[] = {
561 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
565 static EbmlSyntax matroska_blockmore[] = {
566 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
567 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
571 static EbmlSyntax matroska_blockadditions[] = {
572 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
576 static EbmlSyntax matroska_blockgroup[] = {
577 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
578 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
579 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
580 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
581 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
582 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
583 { MATROSKA_ID_CODECSTATE, EBML_NONE },
584 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
588 static EbmlSyntax matroska_cluster[] = {
589 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
590 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
591 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
592 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
593 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
597 static EbmlSyntax matroska_clusters[] = {
598 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
599 { MATROSKA_ID_INFO, EBML_NONE },
600 { MATROSKA_ID_CUES, EBML_NONE },
601 { MATROSKA_ID_TAGS, EBML_NONE },
602 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
606 static EbmlSyntax matroska_cluster_incremental_parsing[] = {
607 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
608 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
609 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
610 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
611 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
612 { MATROSKA_ID_INFO, EBML_NONE },
613 { MATROSKA_ID_CUES, EBML_NONE },
614 { MATROSKA_ID_TAGS, EBML_NONE },
615 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
616 { MATROSKA_ID_CLUSTER, EBML_STOP },
620 static EbmlSyntax matroska_cluster_incremental[] = {
621 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
622 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
623 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
624 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
625 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
629 static EbmlSyntax matroska_clusters_incremental[] = {
630 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
631 { MATROSKA_ID_INFO, EBML_NONE },
632 { MATROSKA_ID_CUES, EBML_NONE },
633 { MATROSKA_ID_TAGS, EBML_NONE },
634 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
638 static const char *const matroska_doctypes[] = { "matroska", "webm" };
640 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
642 AVIOContext *pb = matroska->ctx->pb;
644 matroska->current_id = 0;
645 matroska->num_levels = 0;
647 /* seek to next position to resync from */
648 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
653 // try to find a toplevel element
654 while (!url_feof(pb)) {
655 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
656 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
657 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
658 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
659 matroska->current_id = id;
662 id = (id << 8) | avio_r8(pb);
671 * Return: Whether we reached the end of a level in the hierarchy or not.
673 static int ebml_level_end(MatroskaDemuxContext *matroska)
675 AVIOContext *pb = matroska->ctx->pb;
676 int64_t pos = avio_tell(pb);
678 if (matroska->num_levels > 0) {
679 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
680 if (pos - level->start >= level->length || matroska->current_id) {
681 matroska->num_levels--;
689 * Read: an "EBML number", which is defined as a variable-length
690 * array of bytes. The first byte indicates the length by giving a
691 * number of 0-bits followed by a one. The position of the first
692 * "one" bit inside the first byte indicates the length of this
694 * Returns: number of bytes read, < 0 on error
696 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
697 int max_size, uint64_t *number)
702 /* The first byte tells us the length in bytes - avio_r8() can normally
703 * return 0, but since that's not a valid first ebmlID byte, we can
704 * use it safely here to catch EOS. */
705 if (!(total = avio_r8(pb))) {
706 /* we might encounter EOS here */
708 int64_t pos = avio_tell(pb);
709 av_log(matroska->ctx, AV_LOG_ERROR,
710 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
712 return pb->error ? pb->error : AVERROR(EIO);
717 /* get the length of the EBML number */
718 read = 8 - ff_log2_tab[total];
719 if (read > max_size) {
720 int64_t pos = avio_tell(pb) - 1;
721 av_log(matroska->ctx, AV_LOG_ERROR,
722 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
723 (uint8_t) total, pos, pos);
724 return AVERROR_INVALIDDATA;
727 /* read out length */
728 total ^= 1 << ff_log2_tab[total];
730 total = (total << 8) | avio_r8(pb);
738 * Read a EBML length value.
739 * This needs special handling for the "unknown length" case which has multiple
742 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
745 int res = ebml_read_num(matroska, pb, 8, number);
746 if (res > 0 && *number + 1 == 1ULL << (7 * res))
747 *number = 0xffffffffffffffULL;
752 * Read the next element as an unsigned int.
753 * 0 is success, < 0 is failure.
755 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
760 return AVERROR_INVALIDDATA;
762 /* big-endian ordering; build up number */
765 *num = (*num << 8) | avio_r8(pb);
771 * Read the next element as a signed int.
772 * 0 is success, < 0 is failure.
774 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
779 return AVERROR_INVALIDDATA;
784 *num = sign_extend(avio_r8(pb), 8);
786 /* big-endian ordering; build up number */
788 *num = (*num << 8) | avio_r8(pb);
795 * Read the next element as a float.
796 * 0 is success, < 0 is failure.
798 static int ebml_read_float(AVIOContext *pb, int size, double *num)
803 *num = av_int2float(avio_rb32(pb));
805 *num = av_int2double(avio_rb64(pb));
807 return AVERROR_INVALIDDATA;
813 * Read the next element as an ASCII string.
814 * 0 is success, < 0 is failure.
816 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
820 /* EBML strings are usually not 0-terminated, so we allocate one
821 * byte more, read the string and NULL-terminate it ourselves. */
822 if (!(res = av_malloc(size + 1)))
823 return AVERROR(ENOMEM);
824 if (avio_read(pb, (uint8_t *) res, size) != size) {
836 * Read the next element as binary data.
837 * 0 is success, < 0 is failure.
839 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
841 av_fast_padded_malloc(&bin->data, &bin->size, length);
843 return AVERROR(ENOMEM);
846 bin->pos = avio_tell(pb);
847 if (avio_read(pb, bin->data, length) != length) {
848 av_freep(&bin->data);
857 * Read the next element, but only the header. The contents
858 * are supposed to be sub-elements which can be read separately.
859 * 0 is success, < 0 is failure.
861 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
863 AVIOContext *pb = matroska->ctx->pb;
864 MatroskaLevel *level;
866 if (matroska->num_levels >= EBML_MAX_DEPTH) {
867 av_log(matroska->ctx, AV_LOG_ERROR,
868 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
869 return AVERROR(ENOSYS);
872 level = &matroska->levels[matroska->num_levels++];
873 level->start = avio_tell(pb);
874 level->length = length;
880 * Read signed/unsigned "EBML" numbers.
881 * Return: number of bytes processed, < 0 on error
883 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
884 uint8_t *data, uint32_t size, uint64_t *num)
887 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
888 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
892 * Same as above, but signed.
894 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
895 uint8_t *data, uint32_t size, int64_t *num)
900 /* read as unsigned number first */
901 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
904 /* make signed (weird way) */
905 *num = unum - ((1LL << (7 * res - 1)) - 1);
910 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
911 EbmlSyntax *syntax, void *data);
913 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
914 uint32_t id, void *data)
917 for (i = 0; syntax[i].id; i++)
918 if (id == syntax[i].id)
920 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
921 matroska->num_levels > 0 &&
922 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
923 return 0; // we reached the end of an unknown size cluster
924 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
925 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%"PRIX32"\n", id);
926 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
927 return AVERROR_INVALIDDATA;
929 return ebml_parse_elem(matroska, &syntax[i], data);
932 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
935 if (!matroska->current_id) {
937 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
940 matroska->current_id = id | 1 << 7 * res;
942 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
945 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
950 for (i = 0; syntax[i].id; i++)
951 switch (syntax[i].type) {
953 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
956 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
960 // the default may be NULL
961 if (syntax[i].def.s) {
962 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
963 *dst = av_strdup(syntax[i].def.s);
965 return AVERROR(ENOMEM);
970 while (!res && !ebml_level_end(matroska))
971 res = ebml_parse(matroska, syntax, data);
976 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
977 EbmlSyntax *syntax, void *data)
979 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
982 // max. 16 MB for strings
983 [EBML_STR] = 0x1000000,
984 [EBML_UTF8] = 0x1000000,
985 // max. 256 MB for binary data
986 [EBML_BIN] = 0x10000000,
987 // no limits for anything else
989 AVIOContext *pb = matroska->ctx->pb;
990 uint32_t id = syntax->id;
995 data = (char *) data + syntax->data_offset;
996 if (syntax->list_elem_size) {
997 EbmlList *list = data;
998 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1000 return AVERROR(ENOMEM);
1001 list->elem = newelem;
1002 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1003 memset(data, 0, syntax->list_elem_size);
1007 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1008 matroska->current_id = 0;
1009 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1011 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1012 av_log(matroska->ctx, AV_LOG_ERROR,
1013 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1014 length, max_lengths[syntax->type], syntax->type);
1015 return AVERROR_INVALIDDATA;
1019 switch (syntax->type) {
1021 res = ebml_read_uint(pb, length, data);
1024 res = ebml_read_sint(pb, length, data);
1027 res = ebml_read_float(pb, length, data);
1031 res = ebml_read_ascii(pb, length, data);
1034 res = ebml_read_binary(pb, length, data);
1037 if ((res = ebml_read_master(matroska, length)) < 0)
1039 if (id == MATROSKA_ID_SEGMENT)
1040 matroska->segment_start = avio_tell(matroska->ctx->pb);
1041 return ebml_parse_nest(matroska, syntax->def.n, data);
1043 return ebml_parse_id(matroska, syntax->def.n, id, data);
1047 if (ffio_limit(pb, length) != length)
1048 return AVERROR(EIO);
1049 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1051 if (res == AVERROR_INVALIDDATA)
1052 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1053 else if (res == AVERROR(EIO))
1054 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1058 static void ebml_free(EbmlSyntax *syntax, void *data)
1061 for (i = 0; syntax[i].id; i++) {
1062 void *data_off = (char *) data + syntax[i].data_offset;
1063 switch (syntax[i].type) {
1069 av_freep(&((EbmlBin *) data_off)->data);
1072 if (syntax[i].list_elem_size) {
1073 EbmlList *list = data_off;
1074 char *ptr = list->elem;
1075 for (j = 0; j < list->nb_elem;
1076 j++, ptr += syntax[i].list_elem_size)
1077 ebml_free(syntax[i].def.n, ptr);
1078 av_free(list->elem);
1080 ebml_free(syntax[i].def.n, data_off);
1090 static int matroska_probe(AVProbeData *p)
1093 int len_mask = 0x80, size = 1, n = 1, i;
1096 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1099 /* length of header */
1101 while (size <= 8 && !(total & len_mask)) {
1107 total &= (len_mask - 1);
1109 total = (total << 8) | p->buf[4 + n++];
1111 /* Does the probe data contain the whole header? */
1112 if (p->buf_size < 4 + size + total)
1115 /* The header should contain a known document type. For now,
1116 * we don't parse the whole header but simply check for the
1117 * availability of that array of characters inside the header.
1118 * Not fully fool-proof, but good enough. */
1119 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1120 int probelen = strlen(matroska_doctypes[i]);
1121 if (total < probelen)
1123 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1124 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1125 return AVPROBE_SCORE_MAX;
1128 // probably valid EBML header but no recognized doctype
1129 return AVPROBE_SCORE_EXTENSION;
1132 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1135 MatroskaTrack *tracks = matroska->tracks.elem;
1138 for (i = 0; i < matroska->tracks.nb_elem; i++)
1139 if (tracks[i].num == num)
1142 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1146 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1147 MatroskaTrack *track)
1149 MatroskaTrackEncoding *encodings = track->encodings.elem;
1150 uint8_t *data = *buf;
1151 int isize = *buf_size;
1152 uint8_t *pkt_data = NULL;
1153 uint8_t av_unused *newpktdata;
1154 int pkt_size = isize;
1158 if (pkt_size >= 10000000U)
1159 return AVERROR_INVALIDDATA;
1161 switch (encodings[0].compression.algo) {
1162 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1164 int header_size = encodings[0].compression.settings.size;
1165 uint8_t *header = encodings[0].compression.settings.data;
1167 if (header_size && !header) {
1168 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1175 pkt_size = isize + header_size;
1176 pkt_data = av_malloc(pkt_size);
1178 return AVERROR(ENOMEM);
1180 memcpy(pkt_data, header, header_size);
1181 memcpy(pkt_data + header_size, data, isize);
1185 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1187 olen = pkt_size *= 3;
1188 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1190 result = AVERROR(ENOMEM);
1193 pkt_data = newpktdata;
1194 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1195 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1197 result = AVERROR_INVALIDDATA;
1204 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1206 z_stream zstream = { 0 };
1207 if (inflateInit(&zstream) != Z_OK)
1209 zstream.next_in = data;
1210 zstream.avail_in = isize;
1213 newpktdata = av_realloc(pkt_data, pkt_size);
1215 inflateEnd(&zstream);
1218 pkt_data = newpktdata;
1219 zstream.avail_out = pkt_size - zstream.total_out;
1220 zstream.next_out = pkt_data + zstream.total_out;
1222 result = inflate(&zstream, Z_NO_FLUSH);
1224 result = Z_MEM_ERROR;
1225 } while (result == Z_OK && pkt_size < 10000000);
1226 pkt_size = zstream.total_out;
1227 inflateEnd(&zstream);
1228 if (result != Z_STREAM_END) {
1229 if (result == Z_MEM_ERROR)
1230 result = AVERROR(ENOMEM);
1232 result = AVERROR_INVALIDDATA;
1239 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1241 bz_stream bzstream = { 0 };
1242 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1244 bzstream.next_in = data;
1245 bzstream.avail_in = isize;
1248 newpktdata = av_realloc(pkt_data, pkt_size);
1250 BZ2_bzDecompressEnd(&bzstream);
1253 pkt_data = newpktdata;
1254 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1255 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1257 result = BZ2_bzDecompress(&bzstream);
1259 result = BZ_MEM_ERROR;
1260 } while (result == BZ_OK && pkt_size < 10000000);
1261 pkt_size = bzstream.total_out_lo32;
1262 BZ2_bzDecompressEnd(&bzstream);
1263 if (result != BZ_STREAM_END) {
1264 if (result == BZ_MEM_ERROR)
1265 result = AVERROR(ENOMEM);
1267 result = AVERROR_INVALIDDATA;
1274 return AVERROR_INVALIDDATA;
1278 *buf_size = pkt_size;
1287 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1288 AVPacket *pkt, uint64_t display_duration)
1291 char *layer, *ptr = pkt->data, *end = ptr + pkt->size;
1293 for (; *ptr != ',' && ptr < end - 1; ptr++)
1298 for (; *ptr != ',' && ptr < end - 1; ptr++)
1301 int64_t end_pts = pkt->pts + display_duration;
1302 int sc = matroska->time_scale * pkt->pts / 10000000;
1303 int ec = matroska->time_scale * end_pts / 10000000;
1304 int sh, sm, ss, eh, em, es, len;
1318 len = 50 + end - ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1319 if (!(line = av_buffer_alloc(len)))
1321 snprintf(line->data, len,
1322 "Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1323 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1324 av_buffer_unref(&pkt->buf);
1326 pkt->data = line->data;
1327 pkt->size = strlen(line->data);
1331 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1333 int ret = av_grow_packet(out, in->size);
1337 memcpy(out->data + out->size - in->size, in->data, in->size);
1345 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1346 AVDictionary **metadata, char *prefix)
1348 MatroskaTag *tags = list->elem;
1352 for (i = 0; i < list->nb_elem; i++) {
1353 const char *lang = tags[i].lang &&
1354 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1356 if (!tags[i].name) {
1357 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1361 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1363 av_strlcpy(key, tags[i].name, sizeof(key));
1364 if (tags[i].def || !lang) {
1365 av_dict_set(metadata, key, tags[i].string, 0);
1366 if (tags[i].sub.nb_elem)
1367 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1370 av_strlcat(key, "-", sizeof(key));
1371 av_strlcat(key, lang, sizeof(key));
1372 av_dict_set(metadata, key, tags[i].string, 0);
1373 if (tags[i].sub.nb_elem)
1374 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1377 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1380 static void matroska_convert_tags(AVFormatContext *s)
1382 MatroskaDemuxContext *matroska = s->priv_data;
1383 MatroskaTags *tags = matroska->tags.elem;
1386 for (i = 0; i < matroska->tags.nb_elem; i++) {
1387 if (tags[i].target.attachuid) {
1388 MatroskaAttachment *attachment = matroska->attachments.elem;
1389 for (j = 0; j < matroska->attachments.nb_elem; j++)
1390 if (attachment[j].uid == tags[i].target.attachuid &&
1391 attachment[j].stream)
1392 matroska_convert_tag(s, &tags[i].tag,
1393 &attachment[j].stream->metadata, NULL);
1394 } else if (tags[i].target.chapteruid) {
1395 MatroskaChapter *chapter = matroska->chapters.elem;
1396 for (j = 0; j < matroska->chapters.nb_elem; j++)
1397 if (chapter[j].uid == tags[i].target.chapteruid &&
1399 matroska_convert_tag(s, &tags[i].tag,
1400 &chapter[j].chapter->metadata, NULL);
1401 } else if (tags[i].target.trackuid) {
1402 MatroskaTrack *track = matroska->tracks.elem;
1403 for (j = 0; j < matroska->tracks.nb_elem; j++)
1404 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1405 matroska_convert_tag(s, &tags[i].tag,
1406 &track[j].stream->metadata, NULL);
1408 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1409 tags[i].target.type);
1414 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1417 EbmlList *seekhead_list = &matroska->seekhead;
1418 uint32_t level_up = matroska->level_up;
1419 uint32_t saved_id = matroska->current_id;
1420 MatroskaSeekhead *seekhead = seekhead_list->elem;
1421 int64_t before_pos = avio_tell(matroska->ctx->pb);
1422 MatroskaLevel level;
1426 if (idx >= seekhead_list->nb_elem ||
1427 seekhead[idx].id == MATROSKA_ID_SEEKHEAD ||
1428 seekhead[idx].id == MATROSKA_ID_CLUSTER)
1432 offset = seekhead[idx].pos + matroska->segment_start;
1433 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1434 /* We don't want to lose our seekhead level, so we add
1435 * a dummy. This is a crude hack. */
1436 if (matroska->num_levels == EBML_MAX_DEPTH) {
1437 av_log(matroska->ctx, AV_LOG_INFO,
1438 "Max EBML element depth (%d) reached, "
1439 "cannot parse further.\n", EBML_MAX_DEPTH);
1440 ret = AVERROR_INVALIDDATA;
1443 level.length = (uint64_t) -1;
1444 matroska->levels[matroska->num_levels] = level;
1445 matroska->num_levels++;
1446 matroska->current_id = 0;
1448 ret = ebml_parse(matroska, matroska_segment, matroska);
1450 /* remove dummy level */
1451 while (matroska->num_levels) {
1452 uint64_t length = matroska->levels[--matroska->num_levels].length;
1453 if (length == (uint64_t) -1)
1459 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1460 matroska->level_up = level_up;
1461 matroska->current_id = saved_id;
1466 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1468 EbmlList *seekhead_list = &matroska->seekhead;
1469 int64_t before_pos = avio_tell(matroska->ctx->pb);
1472 // we should not do any seeking in the streaming case
1473 if (!matroska->ctx->pb->seekable ||
1474 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1477 for (i = 0; i < seekhead_list->nb_elem; i++) {
1478 MatroskaSeekhead *seekhead = seekhead_list->elem;
1479 if (seekhead[i].pos <= before_pos)
1482 // defer cues parsing until we actually need cue data.
1483 if (seekhead[i].id == MATROSKA_ID_CUES) {
1484 matroska->cues_parsing_deferred = 1;
1488 if (matroska_parse_seekhead_entry(matroska, i) < 0) {
1489 // mark index as broken
1490 matroska->cues_parsing_deferred = -1;
1496 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1498 EbmlList *index_list;
1499 MatroskaIndex *index;
1500 int index_scale = 1;
1503 index_list = &matroska->index;
1504 index = index_list->elem;
1505 if (index_list->nb_elem &&
1506 index[0].time > 1E14 / matroska->time_scale) {
1507 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1508 index_scale = matroska->time_scale;
1510 for (i = 0; i < index_list->nb_elem; i++) {
1511 EbmlList *pos_list = &index[i].pos;
1512 MatroskaIndexPos *pos = pos_list->elem;
1513 for (j = 0; j < pos_list->nb_elem; j++) {
1514 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1516 if (track && track->stream)
1517 av_add_index_entry(track->stream,
1518 pos[j].pos + matroska->segment_start,
1519 index[i].time / index_scale, 0, 0,
1525 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1526 EbmlList *seekhead_list = &matroska->seekhead;
1527 MatroskaSeekhead *seekhead = seekhead_list->elem;
1530 for (i = 0; i < seekhead_list->nb_elem; i++)
1531 if (seekhead[i].id == MATROSKA_ID_CUES)
1533 av_assert1(i <= seekhead_list->nb_elem);
1535 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1536 matroska->cues_parsing_deferred = -1;
1537 matroska_add_index_entries(matroska);
1540 static int matroska_aac_profile(char *codec_id)
1542 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1545 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1546 if (strstr(codec_id, aac_profiles[profile]))
1551 static int matroska_aac_sri(int samplerate)
1555 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1556 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1561 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1564 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1565 time_t creation_time = date_utc / 1000000000 + 978307200;
1566 struct tm *ptm = gmtime(&creation_time);
1568 strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
1569 av_dict_set(metadata, "creation_time", buffer, 0);
1572 static int matroska_read_header(AVFormatContext *s)
1574 MatroskaDemuxContext *matroska = s->priv_data;
1575 EbmlList *attachments_list = &matroska->attachments;
1576 EbmlList *chapters_list = &matroska->chapters;
1577 MatroskaAttachment *attachments;
1578 MatroskaChapter *chapters;
1579 MatroskaTrack *tracks;
1580 uint64_t max_start = 0;
1588 /* First read the EBML header. */
1589 if (ebml_parse(matroska, ebml_syntax, &ebml) ||
1590 ebml.version > EBML_VERSION ||
1591 ebml.max_size > sizeof(uint64_t) ||
1592 ebml.id_length > sizeof(uint32_t) ||
1593 ebml.doctype_version > 3 ||
1595 av_log(matroska->ctx, AV_LOG_ERROR,
1596 "EBML header using unsupported features\n"
1597 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1598 ebml.version, ebml.doctype, ebml.doctype_version);
1599 ebml_free(ebml_syntax, &ebml);
1600 return AVERROR_PATCHWELCOME;
1601 } else if (ebml.doctype_version == 3) {
1602 av_log(matroska->ctx, AV_LOG_WARNING,
1603 "EBML header using unsupported features\n"
1604 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1605 ebml.version, ebml.doctype, ebml.doctype_version);
1607 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1608 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1610 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1611 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1612 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1613 ebml_free(ebml_syntax, &ebml);
1614 return AVERROR_INVALIDDATA;
1617 ebml_free(ebml_syntax, &ebml);
1619 /* The next thing is a segment. */
1620 pos = avio_tell(matroska->ctx->pb);
1621 res = ebml_parse(matroska, matroska_segments, matroska);
1622 // try resyncing until we find a EBML_STOP type element.
1624 res = matroska_resync(matroska, pos);
1627 pos = avio_tell(matroska->ctx->pb);
1628 res = ebml_parse(matroska, matroska_segment, matroska);
1630 matroska_execute_seekhead(matroska);
1632 if (!matroska->time_scale)
1633 matroska->time_scale = 1000000;
1634 if (matroska->duration)
1635 matroska->ctx->duration = matroska->duration * matroska->time_scale *
1636 1000 / AV_TIME_BASE;
1637 av_dict_set(&s->metadata, "title", matroska->title, 0);
1638 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
1640 if (matroska->date_utc.size == 8)
1641 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
1643 tracks = matroska->tracks.elem;
1644 for (i = 0; i < matroska->tracks.nb_elem; i++) {
1645 MatroskaTrack *track = &tracks[i];
1646 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1647 EbmlList *encodings_list = &track->encodings;
1648 MatroskaTrackEncoding *encodings = encodings_list->elem;
1649 uint8_t *extradata = NULL;
1650 int extradata_size = 0;
1651 int extradata_offset = 0;
1652 uint32_t fourcc = 0;
1654 char* key_id_base64 = NULL;
1657 /* Apply some sanity checks. */
1658 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1659 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1660 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1661 track->type != MATROSKA_TRACK_TYPE_METADATA) {
1662 av_log(matroska->ctx, AV_LOG_INFO,
1663 "Unknown or unsupported track type %"PRIu64"\n",
1667 if (track->codec_id == NULL)
1670 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1671 if (!track->default_duration && track->video.frame_rate > 0)
1672 track->default_duration = 1000000000 / track->video.frame_rate;
1673 if (track->video.display_width == -1)
1674 track->video.display_width = track->video.pixel_width;
1675 if (track->video.display_height == -1)
1676 track->video.display_height = track->video.pixel_height;
1677 if (track->video.color_space.size == 4)
1678 fourcc = AV_RL32(track->video.color_space.data);
1679 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1680 if (!track->audio.out_samplerate)
1681 track->audio.out_samplerate = track->audio.samplerate;
1683 if (encodings_list->nb_elem > 1) {
1684 av_log(matroska->ctx, AV_LOG_ERROR,
1685 "Multiple combined encodings not supported");
1686 } else if (encodings_list->nb_elem == 1) {
1687 if (encodings[0].type) {
1688 if (encodings[0].encryption.key_id.size > 0) {
1689 /* Save the encryption key id to be stored later as a
1691 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1692 key_id_base64 = av_malloc(b64_size);
1693 if (key_id_base64 == NULL)
1694 return AVERROR(ENOMEM);
1696 av_base64_encode(key_id_base64, b64_size,
1697 encodings[0].encryption.key_id.data,
1698 encodings[0].encryption.key_id.size);
1700 encodings[0].scope = 0;
1701 av_log(matroska->ctx, AV_LOG_ERROR,
1702 "Unsupported encoding type");
1706 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1709 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1712 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1714 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
1715 encodings[0].scope = 0;
1716 av_log(matroska->ctx, AV_LOG_ERROR,
1717 "Unsupported encoding type");
1718 } else if (track->codec_priv.size && encodings[0].scope & 2) {
1719 uint8_t *codec_priv = track->codec_priv.data;
1720 int ret = matroska_decode_buffer(&track->codec_priv.data,
1721 &track->codec_priv.size,
1724 track->codec_priv.data = NULL;
1725 track->codec_priv.size = 0;
1726 av_log(matroska->ctx, AV_LOG_ERROR,
1727 "Failed to decode codec private data\n");
1730 if (codec_priv != track->codec_priv.data)
1731 av_free(codec_priv);
1735 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1736 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1737 strlen(ff_mkv_codec_tags[j].str))) {
1738 codec_id = ff_mkv_codec_tags[j].id;
1743 st = track->stream = avformat_new_stream(s, NULL);
1745 av_free(key_id_base64);
1746 return AVERROR(ENOMEM);
1749 if (key_id_base64) {
1750 /* export encryption key id as base64 metadata tag */
1751 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
1752 av_freep(&key_id_base64);
1755 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1756 track->codec_priv.size >= 40 &&
1757 track->codec_priv.data != NULL) {
1758 track->ms_compat = 1;
1759 bit_depth = AV_RL16(track->codec_priv.data + 14);
1760 fourcc = AV_RL32(track->codec_priv.data + 16);
1761 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
1763 extradata_offset = 40;
1764 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1765 track->codec_priv.size >= 14 &&
1766 track->codec_priv.data != NULL) {
1768 ffio_init_context(&b, track->codec_priv.data,
1769 track->codec_priv.size,
1770 0, NULL, NULL, NULL, NULL);
1771 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1774 codec_id = st->codec->codec_id;
1775 extradata_offset = FFMIN(track->codec_priv.size, 18);
1776 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
1777 && (track->codec_priv.size >= 86)
1778 && (track->codec_priv.data != NULL)) {
1779 fourcc = AV_RL32(track->codec_priv.data + 4);
1780 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1781 if (ff_codec_get_id(ff_codec_movaudio_tags, AV_RL32(track->codec_priv.data))) {
1782 fourcc = AV_RL32(track->codec_priv.data);
1783 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1785 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1786 (track->codec_priv.size >= 21) &&
1787 (track->codec_priv.data != NULL)) {
1788 fourcc = AV_RL32(track->codec_priv.data + 4);
1789 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1790 if (ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(track->codec_priv.data))) {
1791 fourcc = AV_RL32(track->codec_priv.data);
1792 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1794 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI "))
1795 codec_id = AV_CODEC_ID_SVQ3;
1796 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1797 switch (track->audio.bitdepth) {
1799 codec_id = AV_CODEC_ID_PCM_U8;
1802 codec_id = AV_CODEC_ID_PCM_S24BE;
1805 codec_id = AV_CODEC_ID_PCM_S32BE;
1808 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1809 switch (track->audio.bitdepth) {
1811 codec_id = AV_CODEC_ID_PCM_U8;
1814 codec_id = AV_CODEC_ID_PCM_S24LE;
1817 codec_id = AV_CODEC_ID_PCM_S32LE;
1820 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1821 track->audio.bitdepth == 64) {
1822 codec_id = AV_CODEC_ID_PCM_F64LE;
1823 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1824 int profile = matroska_aac_profile(track->codec_id);
1825 int sri = matroska_aac_sri(track->audio.samplerate);
1826 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1827 if (extradata == NULL)
1828 return AVERROR(ENOMEM);
1829 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1830 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1831 if (strstr(track->codec_id, "SBR")) {
1832 sri = matroska_aac_sri(track->audio.out_samplerate);
1833 extradata[2] = 0x56;
1834 extradata[3] = 0xE5;
1835 extradata[4] = 0x80 | (sri << 3);
1839 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - FF_INPUT_BUFFER_PADDING_SIZE) {
1840 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1841 * Create the "atom size", "tag", and "tag version" fields the
1842 * decoder expects manually. */
1843 extradata_size = 12 + track->codec_priv.size;
1844 extradata = av_mallocz(extradata_size +
1845 FF_INPUT_BUFFER_PADDING_SIZE);
1846 if (extradata == NULL)
1847 return AVERROR(ENOMEM);
1848 AV_WB32(extradata, extradata_size);
1849 memcpy(&extradata[4], "alac", 4);
1850 AV_WB32(&extradata[8], 0);
1851 memcpy(&extradata[12], track->codec_priv.data,
1852 track->codec_priv.size);
1853 } else if (codec_id == AV_CODEC_ID_TTA) {
1854 extradata_size = 30;
1855 extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1856 if (extradata == NULL)
1857 return AVERROR(ENOMEM);
1858 ffio_init_context(&b, extradata, extradata_size, 1,
1859 NULL, NULL, NULL, NULL);
1860 avio_write(&b, "TTA1", 4);
1862 avio_wl16(&b, track->audio.channels);
1863 avio_wl16(&b, track->audio.bitdepth);
1864 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
1865 return AVERROR_INVALIDDATA;
1866 avio_wl32(&b, track->audio.out_samplerate);
1867 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
1868 track->audio.out_samplerate,
1869 AV_TIME_BASE * 1000));
1870 } else if (codec_id == AV_CODEC_ID_RV10 ||
1871 codec_id == AV_CODEC_ID_RV20 ||
1872 codec_id == AV_CODEC_ID_RV30 ||
1873 codec_id == AV_CODEC_ID_RV40) {
1874 extradata_offset = 26;
1875 } else if (codec_id == AV_CODEC_ID_RA_144) {
1876 track->audio.out_samplerate = 8000;
1877 track->audio.channels = 1;
1878 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
1879 codec_id == AV_CODEC_ID_COOK ||
1880 codec_id == AV_CODEC_ID_ATRAC3 ||
1881 codec_id == AV_CODEC_ID_SIPR)
1882 && track->codec_priv.data) {
1885 ffio_init_context(&b, track->codec_priv.data,
1886 track->codec_priv.size,
1887 0, NULL, NULL, NULL, NULL);
1889 flavor = avio_rb16(&b);
1890 track->audio.coded_framesize = avio_rb32(&b);
1892 track->audio.sub_packet_h = avio_rb16(&b);
1893 track->audio.frame_size = avio_rb16(&b);
1894 track->audio.sub_packet_size = avio_rb16(&b);
1896 track->audio.coded_framesize <= 0 ||
1897 track->audio.sub_packet_h <= 0 ||
1898 track->audio.frame_size <= 0 ||
1899 track->audio.sub_packet_size <= 0)
1900 return AVERROR_INVALIDDATA;
1901 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
1902 track->audio.frame_size);
1903 if (!track->audio.buf)
1904 return AVERROR(ENOMEM);
1905 if (codec_id == AV_CODEC_ID_RA_288) {
1906 st->codec->block_align = track->audio.coded_framesize;
1907 track->codec_priv.size = 0;
1909 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1910 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1911 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1912 st->codec->bit_rate = sipr_bit_rate[flavor];
1914 st->codec->block_align = track->audio.sub_packet_size;
1915 extradata_offset = 78;
1917 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
1918 fourcc = AV_RL32(track->codec_priv.data);
1920 track->codec_priv.size -= extradata_offset;
1922 if (codec_id == AV_CODEC_ID_NONE)
1923 av_log(matroska->ctx, AV_LOG_INFO,
1924 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1926 if (track->time_scale < 0.01)
1927 track->time_scale = 1.0;
1928 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1929 1000 * 1000 * 1000); /* 64 bit pts in ns */
1931 st->codec->codec_id = codec_id;
1933 if (strcmp(track->language, "und"))
1934 av_dict_set(&st->metadata, "language", track->language, 0);
1935 av_dict_set(&st->metadata, "title", track->name, 0);
1937 if (track->flag_default)
1938 st->disposition |= AV_DISPOSITION_DEFAULT;
1939 if (track->flag_forced)
1940 st->disposition |= AV_DISPOSITION_FORCED;
1942 if (!st->codec->extradata) {
1944 st->codec->extradata = extradata;
1945 st->codec->extradata_size = extradata_size;
1946 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1947 if (ff_alloc_extradata(st->codec, track->codec_priv.size))
1948 return AVERROR(ENOMEM);
1949 memcpy(st->codec->extradata,
1950 track->codec_priv.data + extradata_offset,
1951 track->codec_priv.size);
1955 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1956 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
1958 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1959 st->codec->codec_tag = fourcc;
1961 st->codec->bits_per_coded_sample = bit_depth;
1962 st->codec->width = track->video.pixel_width;
1963 st->codec->height = track->video.pixel_height;
1964 av_reduce(&st->sample_aspect_ratio.num,
1965 &st->sample_aspect_ratio.den,
1966 st->codec->height * track->video.display_width,
1967 st->codec->width * track->video.display_height,
1969 if (st->codec->codec_id != AV_CODEC_ID_HEVC)
1970 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1972 if (track->default_duration) {
1973 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1974 1000000000, track->default_duration, 30000);
1975 #if FF_API_R_FRAME_RATE
1976 if (st->avg_frame_rate.num < st->avg_frame_rate.den * 1000L)
1977 st->r_frame_rate = st->avg_frame_rate;
1981 /* export stereo mode flag as metadata tag */
1982 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREO_MODE_COUNT)
1983 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
1985 /* export alpha mode flag as metadata tag */
1986 if (track->video.alpha_mode)
1987 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
1989 /* if we have virtual track, mark the real tracks */
1990 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
1992 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
1994 snprintf(buf, sizeof(buf), "%s_%d",
1995 ff_matroska_video_stereo_plane[planes[j].type], i);
1996 for (k=0; k < matroska->tracks.nb_elem; k++)
1997 if (planes[j].uid == tracks[k].uid) {
1998 av_dict_set(&s->streams[k]->metadata,
1999 "stereo_mode", buf, 0);
2003 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2004 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
2005 st->codec->sample_rate = track->audio.out_samplerate;
2006 st->codec->channels = track->audio.channels;
2007 if (!st->codec->bits_per_coded_sample)
2008 st->codec->bits_per_coded_sample = track->audio.bitdepth;
2009 if (st->codec->codec_id != AV_CODEC_ID_AAC)
2010 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2011 if (track->codec_delay > 0) {
2012 st->codec->delay = av_rescale_q(track->codec_delay,
2013 (AVRational){1, 1000000000},
2014 (AVRational){1, st->codec->sample_rate});
2016 if (track->seek_preroll > 0) {
2017 av_codec_set_seek_preroll(st->codec,
2018 av_rescale_q(track->seek_preroll,
2019 (AVRational){1, 1000000000},
2020 (AVRational){1, st->codec->sample_rate}));
2022 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2023 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2025 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2026 st->disposition |= AV_DISPOSITION_CAPTIONS;
2027 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2028 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2029 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2030 st->disposition |= AV_DISPOSITION_METADATA;
2032 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2033 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2035 if (st->codec->codec_id == AV_CODEC_ID_SSA ||
2036 st->codec->codec_id == AV_CODEC_ID_ASS)
2038 if (st->codec->codec_id == AV_CODEC_ID_ASS)
2040 matroska->contains_ssa = 1;
2044 attachments = attachments_list->elem;
2045 for (j = 0; j < attachments_list->nb_elem; j++) {
2046 if (!(attachments[j].filename && attachments[j].mime &&
2047 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2048 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2050 AVStream *st = avformat_new_stream(s, NULL);
2053 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2054 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2055 st->codec->codec_id = AV_CODEC_ID_NONE;
2056 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2057 if (ff_alloc_extradata(st->codec, attachments[j].bin.size))
2059 memcpy(st->codec->extradata, attachments[j].bin.data,
2060 attachments[j].bin.size);
2062 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2063 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2064 strlen(ff_mkv_mime_tags[i].str))) {
2065 st->codec->codec_id = ff_mkv_mime_tags[i].id;
2069 attachments[j].stream = st;
2073 chapters = chapters_list->elem;
2074 for (i = 0; i < chapters_list->nb_elem; i++)
2075 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2076 (max_start == 0 || chapters[i].start > max_start)) {
2077 chapters[i].chapter =
2078 avpriv_new_chapter(s, chapters[i].uid,
2079 (AVRational) { 1, 1000000000 },
2080 chapters[i].start, chapters[i].end,
2082 av_dict_set(&chapters[i].chapter->metadata,
2083 "title", chapters[i].title, 0);
2084 max_start = chapters[i].start;
2087 matroska_add_index_entries(matroska);
2089 matroska_convert_tags(s);
2095 * Put one packet in an application-supplied AVPacket struct.
2096 * Returns 0 on success or -1 on failure.
2098 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2101 if (matroska->num_packets > 0) {
2102 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2103 av_free(matroska->packets[0]);
2104 if (matroska->num_packets > 1) {
2106 memmove(&matroska->packets[0], &matroska->packets[1],
2107 (matroska->num_packets - 1) * sizeof(AVPacket *));
2108 newpackets = av_realloc(matroska->packets,
2109 (matroska->num_packets - 1) *
2110 sizeof(AVPacket *));
2112 matroska->packets = newpackets;
2114 av_freep(&matroska->packets);
2115 matroska->prev_pkt = NULL;
2117 matroska->num_packets--;
2125 * Free all packets in our internal queue.
2127 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2129 matroska->prev_pkt = NULL;
2130 if (matroska->packets) {
2132 for (n = 0; n < matroska->num_packets; n++) {
2133 av_free_packet(matroska->packets[n]);
2134 av_free(matroska->packets[n]);
2136 av_freep(&matroska->packets);
2137 matroska->num_packets = 0;
2141 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2142 int *buf_size, int type,
2143 uint32_t **lace_buf, int *laces)
2145 int res = 0, n, size = *buf_size;
2146 uint8_t *data = *buf;
2147 uint32_t *lace_size;
2151 *lace_buf = av_mallocz(sizeof(int));
2153 return AVERROR(ENOMEM);
2155 *lace_buf[0] = size;
2159 av_assert0(size > 0);
2163 lace_size = av_mallocz(*laces * sizeof(int));
2165 return AVERROR(ENOMEM);
2168 case 0x1: /* Xiph lacing */
2172 for (n = 0; res == 0 && n < *laces - 1; n++) {
2174 if (size <= total) {
2175 res = AVERROR_INVALIDDATA;
2180 lace_size[n] += temp;
2187 if (size <= total) {
2188 res = AVERROR_INVALIDDATA;
2192 lace_size[n] = size - total;
2196 case 0x2: /* fixed-size lacing */
2197 if (size % (*laces)) {
2198 res = AVERROR_INVALIDDATA;
2201 for (n = 0; n < *laces; n++)
2202 lace_size[n] = size / *laces;
2205 case 0x3: /* EBML lacing */
2209 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2210 if (n < 0 || num > INT_MAX) {
2211 av_log(matroska->ctx, AV_LOG_INFO,
2212 "EBML block data error\n");
2213 res = n<0 ? n : AVERROR_INVALIDDATA;
2218 total = lace_size[0] = num;
2219 for (n = 1; res == 0 && n < *laces - 1; n++) {
2222 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2223 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2224 av_log(matroska->ctx, AV_LOG_INFO,
2225 "EBML block data error\n");
2226 res = r<0 ? r : AVERROR_INVALIDDATA;
2231 lace_size[n] = lace_size[n - 1] + snum;
2232 total += lace_size[n];
2234 if (size <= total) {
2235 res = AVERROR_INVALIDDATA;
2238 lace_size[*laces - 1] = size - total;
2244 *lace_buf = lace_size;
2250 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2251 MatroskaTrack *track, AVStream *st,
2252 uint8_t *data, int size, uint64_t timecode,
2255 int a = st->codec->block_align;
2256 int sps = track->audio.sub_packet_size;
2257 int cfs = track->audio.coded_framesize;
2258 int h = track->audio.sub_packet_h;
2259 int y = track->audio.sub_packet_cnt;
2260 int w = track->audio.frame_size;
2263 if (!track->audio.pkt_cnt) {
2264 if (track->audio.sub_packet_cnt == 0)
2265 track->audio.buf_timecode = timecode;
2266 if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2267 if (size < cfs * h / 2) {
2268 av_log(matroska->ctx, AV_LOG_ERROR,
2269 "Corrupt int4 RM-style audio packet size\n");
2270 return AVERROR_INVALIDDATA;
2272 for (x = 0; x < h / 2; x++)
2273 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2274 data + x * cfs, cfs);
2275 } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2277 av_log(matroska->ctx, AV_LOG_ERROR,
2278 "Corrupt sipr RM-style audio packet size\n");
2279 return AVERROR_INVALIDDATA;
2281 memcpy(track->audio.buf + y * w, data, w);
2283 if (size < sps * w / sps || h<=0 || w%sps) {
2284 av_log(matroska->ctx, AV_LOG_ERROR,
2285 "Corrupt generic RM-style audio packet size\n");
2286 return AVERROR_INVALIDDATA;
2288 for (x = 0; x < w / sps; x++)
2289 memcpy(track->audio.buf +
2290 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2291 data + x * sps, sps);
2294 if (++track->audio.sub_packet_cnt >= h) {
2295 if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2296 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2297 track->audio.sub_packet_cnt = 0;
2298 track->audio.pkt_cnt = h * w / a;
2302 while (track->audio.pkt_cnt) {
2303 AVPacket *pkt = NULL;
2304 if (!(pkt = av_mallocz(sizeof(AVPacket))) || av_new_packet(pkt, a) < 0) {
2306 return AVERROR(ENOMEM);
2309 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2311 pkt->pts = track->audio.buf_timecode;
2312 track->audio.buf_timecode = AV_NOPTS_VALUE;
2314 pkt->stream_index = st->index;
2315 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2321 /* reconstruct full wavpack blocks from mangled matroska ones */
2322 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2323 uint8_t **pdst, int *size)
2325 uint8_t *dst = NULL;
2330 int ret, offset = 0;
2332 if (srclen < 12 || track->stream->codec->extradata_size < 2)
2333 return AVERROR_INVALIDDATA;
2335 ver = AV_RL16(track->stream->codec->extradata);
2337 samples = AV_RL32(src);
2341 while (srclen >= 8) {
2346 uint32_t flags = AV_RL32(src);
2347 uint32_t crc = AV_RL32(src + 4);
2351 multiblock = (flags & 0x1800) != 0x1800;
2354 ret = AVERROR_INVALIDDATA;
2357 blocksize = AV_RL32(src);
2363 if (blocksize > srclen) {
2364 ret = AVERROR_INVALIDDATA;
2368 tmp = av_realloc(dst, dstlen + blocksize + 32);
2370 ret = AVERROR(ENOMEM);
2374 dstlen += blocksize + 32;
2376 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2377 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2378 AV_WL16(dst + offset + 8, ver); // version
2379 AV_WL16(dst + offset + 10, 0); // track/index_no
2380 AV_WL32(dst + offset + 12, 0); // total samples
2381 AV_WL32(dst + offset + 16, 0); // block index
2382 AV_WL32(dst + offset + 20, samples); // number of samples
2383 AV_WL32(dst + offset + 24, flags); // flags
2384 AV_WL32(dst + offset + 28, crc); // crc
2385 memcpy(dst + offset + 32, src, blocksize); // block data
2388 srclen -= blocksize;
2389 offset += blocksize + 32;
2402 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
2403 MatroskaTrack *track,
2405 uint8_t *data, int data_len,
2411 uint8_t *id, *settings, *text, *buf;
2412 int id_len, settings_len, text_len;
2417 return AVERROR_INVALIDDATA;
2420 q = data + data_len;
2425 if (*p == '\r' || *p == '\n') {
2434 if (p >= q || *p != '\n')
2435 return AVERROR_INVALIDDATA;
2441 if (*p == '\r' || *p == '\n') {
2442 settings_len = p - settings;
2450 if (p >= q || *p != '\n')
2451 return AVERROR_INVALIDDATA;
2456 while (text_len > 0) {
2457 const int len = text_len - 1;
2458 const uint8_t c = p[len];
2459 if (c != '\r' && c != '\n')
2465 return AVERROR_INVALIDDATA;
2467 pkt = av_mallocz(sizeof(*pkt));
2468 err = av_new_packet(pkt, text_len);
2471 return AVERROR(err);
2474 memcpy(pkt->data, text, text_len);
2477 buf = av_packet_new_side_data(pkt,
2478 AV_PKT_DATA_WEBVTT_IDENTIFIER,
2482 return AVERROR(ENOMEM);
2484 memcpy(buf, id, id_len);
2487 if (settings_len > 0) {
2488 buf = av_packet_new_side_data(pkt,
2489 AV_PKT_DATA_WEBVTT_SETTINGS,
2493 return AVERROR(ENOMEM);
2495 memcpy(buf, settings, settings_len);
2498 // Do we need this for subtitles?
2499 // pkt->flags = AV_PKT_FLAG_KEY;
2501 pkt->stream_index = st->index;
2502 pkt->pts = timecode;
2504 // Do we need this for subtitles?
2505 // pkt->dts = timecode;
2507 pkt->duration = duration;
2510 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2511 matroska->prev_pkt = pkt;
2516 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2517 MatroskaTrack *track, AVStream *st,
2518 uint8_t *data, int pkt_size,
2519 uint64_t timecode, uint64_t lace_duration,
2520 int64_t pos, int is_keyframe,
2521 uint8_t *additional, uint64_t additional_id, int additional_size,
2522 int64_t discard_padding)
2524 MatroskaTrackEncoding *encodings = track->encodings.elem;
2525 uint8_t *pkt_data = data;
2526 int offset = 0, res;
2529 if (encodings && !encodings->type && encodings->scope & 1) {
2530 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2535 if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2537 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2539 av_log(matroska->ctx, AV_LOG_ERROR,
2540 "Error parsing a wavpack block.\n");
2543 if (pkt_data != data)
2544 av_freep(&pkt_data);
2548 if (st->codec->codec_id == AV_CODEC_ID_PRORES)
2551 pkt = av_mallocz(sizeof(AVPacket));
2552 /* XXX: prevent data copy... */
2553 if (av_new_packet(pkt, pkt_size + offset) < 0) {
2555 res = AVERROR(ENOMEM);
2559 if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
2560 uint8_t *buf = pkt->data;
2561 bytestream_put_be32(&buf, pkt_size);
2562 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2565 memcpy(pkt->data + offset, pkt_data, pkt_size);
2567 if (pkt_data != data)
2568 av_freep(&pkt_data);
2570 pkt->flags = is_keyframe;
2571 pkt->stream_index = st->index;
2573 if (additional_size > 0) {
2574 uint8_t *side_data = av_packet_new_side_data(pkt,
2575 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2576 additional_size + 8);
2577 if (side_data == NULL) {
2578 av_free_packet(pkt);
2580 return AVERROR(ENOMEM);
2582 AV_WB64(side_data, additional_id);
2583 memcpy(side_data + 8, additional, additional_size);
2586 if (discard_padding) {
2587 uint8_t *side_data = av_packet_new_side_data(pkt,
2588 AV_PKT_DATA_SKIP_SAMPLES,
2590 if (side_data == NULL) {
2591 av_free_packet(pkt);
2593 return AVERROR(ENOMEM);
2595 AV_WL32(side_data, 0);
2596 AV_WL32(side_data + 4, av_rescale_q(discard_padding,
2597 (AVRational){1, 1000000000},
2598 (AVRational){1, st->codec->sample_rate}));
2601 if (track->ms_compat)
2602 pkt->dts = timecode;
2604 pkt->pts = timecode;
2606 if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
2608 * For backward compatibility.
2609 * Historically, we have put subtitle duration
2610 * in convergence_duration, on the off chance
2611 * that the time_scale is less than 1us, which
2612 * could result in a 32bit overflow on the
2613 * normal duration field.
2615 pkt->convergence_duration = lace_duration;
2618 if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE ||
2619 lace_duration <= INT_MAX) {
2621 * For non subtitle tracks, just store the duration
2624 * If it's a subtitle track and duration value does
2625 * not overflow a uint32, then also store it normally.
2627 pkt->duration = lace_duration;
2631 if (st->codec->codec_id == AV_CODEC_ID_SSA)
2632 matroska_fix_ass_packet(matroska, pkt, lace_duration);
2634 if (matroska->prev_pkt &&
2635 timecode != AV_NOPTS_VALUE &&
2636 matroska->prev_pkt->pts == timecode &&
2637 matroska->prev_pkt->stream_index == st->index &&
2638 st->codec->codec_id == AV_CODEC_ID_SSA)
2639 matroska_merge_packets(matroska->prev_pkt, pkt);
2641 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2642 matroska->prev_pkt = pkt;
2645 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2646 matroska->prev_pkt = pkt;
2652 if (pkt_data != data)
2653 av_freep(&pkt_data);
2657 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2658 int size, int64_t pos, uint64_t cluster_time,
2659 uint64_t block_duration, int is_keyframe,
2660 uint8_t *additional, uint64_t additional_id, int additional_size,
2661 int64_t cluster_pos, int64_t discard_padding)
2663 uint64_t timecode = AV_NOPTS_VALUE;
2664 MatroskaTrack *track;
2668 uint32_t *lace_size = NULL;
2669 int n, flags, laces = 0;
2671 int trust_default_duration = 1;
2673 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2674 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2680 track = matroska_find_track_by_num(matroska, num);
2681 if (!track || !track->stream) {
2682 av_log(matroska->ctx, AV_LOG_INFO,
2683 "Invalid stream %"PRIu64" or size %u\n", num, size);
2684 return AVERROR_INVALIDDATA;
2685 } else if (size <= 3)
2688 if (st->discard >= AVDISCARD_ALL)
2690 av_assert1(block_duration != AV_NOPTS_VALUE);
2692 block_time = sign_extend(AV_RB16(data), 16);
2696 if (is_keyframe == -1)
2697 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2699 if (cluster_time != (uint64_t) -1 &&
2700 (block_time >= 0 || cluster_time >= -block_time)) {
2701 timecode = cluster_time + block_time;
2702 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2703 timecode < track->end_timecode)
2704 is_keyframe = 0; /* overlapping subtitles are not key frame */
2706 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2710 if (matroska->skip_to_keyframe &&
2711 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2712 if (timecode < matroska->skip_to_timecode)
2715 matroska->skip_to_keyframe = 0;
2716 else if (!st->skip_to_keyframe) {
2717 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
2718 matroska->skip_to_keyframe = 0;
2722 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2723 &lace_size, &laces);
2728 if (track->audio.samplerate == 8000) {
2729 // If this is needed for more codecs, then add them here
2730 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
2731 if (track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
2732 trust_default_duration = 0;
2736 if (!block_duration && trust_default_duration)
2737 block_duration = track->default_duration * laces / matroska->time_scale;
2739 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
2740 track->end_timecode =
2741 FFMAX(track->end_timecode, timecode + block_duration);
2743 for (n = 0; n < laces; n++) {
2744 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
2746 if (lace_size[n] > size) {
2747 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
2751 if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2752 st->codec->codec_id == AV_CODEC_ID_COOK ||
2753 st->codec->codec_id == AV_CODEC_ID_SIPR ||
2754 st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2755 st->codec->block_align && track->audio.sub_packet_size) {
2756 res = matroska_parse_rm_audio(matroska, track, st, data,
2762 } else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
2763 res = matroska_parse_webvtt(matroska, track, st,
2765 timecode, lace_duration,
2770 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2771 timecode, lace_duration, pos,
2772 !n ? is_keyframe : 0,
2773 additional, additional_id, additional_size,
2779 if (timecode != AV_NOPTS_VALUE)
2780 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
2781 data += lace_size[n];
2782 size -= lace_size[n];
2790 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2792 EbmlList *blocks_list;
2793 MatroskaBlock *blocks;
2795 res = ebml_parse(matroska,
2796 matroska_cluster_incremental_parsing,
2797 &matroska->current_cluster);
2800 if (matroska->current_cluster_pos)
2801 ebml_level_end(matroska);
2802 ebml_free(matroska_cluster, &matroska->current_cluster);
2803 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2804 matroska->current_cluster_num_blocks = 0;
2805 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2806 matroska->prev_pkt = NULL;
2807 /* sizeof the ID which was already read */
2808 if (matroska->current_id)
2809 matroska->current_cluster_pos -= 4;
2810 res = ebml_parse(matroska,
2811 matroska_clusters_incremental,
2812 &matroska->current_cluster);
2813 /* Try parsing the block again. */
2815 res = ebml_parse(matroska,
2816 matroska_cluster_incremental_parsing,
2817 &matroska->current_cluster);
2821 matroska->current_cluster_num_blocks <
2822 matroska->current_cluster.blocks.nb_elem) {
2823 blocks_list = &matroska->current_cluster.blocks;
2824 blocks = blocks_list->elem;
2826 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2827 i = blocks_list->nb_elem - 1;
2828 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2829 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2830 uint8_t* additional = blocks[i].additional.size > 0 ?
2831 blocks[i].additional.data : NULL;
2832 if (!blocks[i].non_simple)
2833 blocks[i].duration = 0;
2834 res = matroska_parse_block(matroska, blocks[i].bin.data,
2835 blocks[i].bin.size, blocks[i].bin.pos,
2836 matroska->current_cluster.timecode,
2837 blocks[i].duration, is_keyframe,
2838 additional, blocks[i].additional_id,
2839 blocks[i].additional.size,
2840 matroska->current_cluster_pos,
2841 blocks[i].discard_padding);
2848 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2850 MatroskaCluster cluster = { 0 };
2851 EbmlList *blocks_list;
2852 MatroskaBlock *blocks;
2856 if (!matroska->contains_ssa)
2857 return matroska_parse_cluster_incremental(matroska);
2858 pos = avio_tell(matroska->ctx->pb);
2859 matroska->prev_pkt = NULL;
2860 if (matroska->current_id)
2861 pos -= 4; /* sizeof the ID which was already read */
2862 res = ebml_parse(matroska, matroska_clusters, &cluster);
2863 blocks_list = &cluster.blocks;
2864 blocks = blocks_list->elem;
2865 for (i = 0; i < blocks_list->nb_elem; i++)
2866 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2867 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2868 res = matroska_parse_block(matroska, blocks[i].bin.data,
2869 blocks[i].bin.size, blocks[i].bin.pos,
2870 cluster.timecode, blocks[i].duration,
2871 is_keyframe, NULL, 0, 0, pos,
2872 blocks[i].discard_padding);
2874 ebml_free(matroska_cluster, &cluster);
2878 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2880 MatroskaDemuxContext *matroska = s->priv_data;
2882 while (matroska_deliver_packet(matroska, pkt)) {
2883 int64_t pos = avio_tell(matroska->ctx->pb);
2886 if (matroska_parse_cluster(matroska) < 0)
2887 matroska_resync(matroska, pos);
2893 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2894 int64_t timestamp, int flags)
2896 MatroskaDemuxContext *matroska = s->priv_data;
2897 MatroskaTrack *tracks = matroska->tracks.elem;
2898 AVStream *st = s->streams[stream_index];
2899 int i, index, index_sub, index_min;
2901 /* Parse the CUES now since we need the index data to seek. */
2902 if (matroska->cues_parsing_deferred > 0) {
2903 matroska->cues_parsing_deferred = 0;
2904 matroska_parse_cues(matroska);
2907 if (!st->nb_index_entries)
2909 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2911 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2912 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
2914 matroska->current_id = 0;
2915 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2916 matroska_clear_queue(matroska);
2917 if (matroska_parse_cluster(matroska) < 0)
2922 matroska_clear_queue(matroska);
2923 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
2927 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2928 tracks[i].audio.pkt_cnt = 0;
2929 tracks[i].audio.sub_packet_cnt = 0;
2930 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2931 tracks[i].end_timecode = 0;
2932 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2933 tracks[i].stream->discard != AVDISCARD_ALL) {
2934 index_sub = av_index_search_timestamp(
2935 tracks[i].stream, st->index_entries[index].timestamp,
2936 AVSEEK_FLAG_BACKWARD);
2937 while (index_sub >= 0 &&
2939 tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
2940 st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
2945 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2946 matroska->current_id = 0;
2947 if (flags & AVSEEK_FLAG_ANY) {
2948 st->skip_to_keyframe = 0;
2949 matroska->skip_to_timecode = timestamp;
2951 st->skip_to_keyframe = 1;
2952 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2954 matroska->skip_to_keyframe = 1;
2956 matroska->num_levels = 0;
2957 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2960 // slightly hackish but allows proper fallback to
2961 // the generic seeking code.
2962 matroska_clear_queue(matroska);
2963 matroska->current_id = 0;
2964 st->skip_to_keyframe =
2965 matroska->skip_to_keyframe = 0;
2967 matroska->num_levels = 0;
2971 static int matroska_read_close(AVFormatContext *s)
2973 MatroskaDemuxContext *matroska = s->priv_data;
2974 MatroskaTrack *tracks = matroska->tracks.elem;
2977 matroska_clear_queue(matroska);
2979 for (n = 0; n < matroska->tracks.nb_elem; n++)
2980 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2981 av_free(tracks[n].audio.buf);
2982 ebml_free(matroska_cluster, &matroska->current_cluster);
2983 ebml_free(matroska_segment, matroska);
2988 AVInputFormat ff_matroska_demuxer = {
2989 .name = "matroska,webm",
2990 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2991 .priv_data_size = sizeof(MatroskaDemuxContext),
2992 .read_probe = matroska_probe,
2993 .read_header = matroska_read_header,
2994 .read_packet = matroska_read_packet,
2995 .read_close = matroska_read_close,
2996 .read_seek = matroska_read_seek,