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/
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
42 #include "libavutil/mathematics.h"
43 #include "libavutil/opt.h"
44 #include "libavutil/time_internal.h"
46 #include "libavcodec/bytestream.h"
47 #include "libavcodec/flac.h"
48 #include "libavcodec/mpeg4audio.h"
51 #include "avio_internal.h"
56 /* For ff_codec_get_id(). */
82 typedef const struct EbmlSyntax {
91 const struct EbmlSyntax *n;
95 typedef struct EbmlList {
100 typedef struct EbmlBin {
106 typedef struct Ebml {
111 uint64_t doctype_version;
114 typedef struct MatroskaTrackCompression {
117 } MatroskaTrackCompression;
119 typedef struct MatroskaTrackEncryption {
122 } MatroskaTrackEncryption;
124 typedef struct MatroskaTrackEncoding {
127 MatroskaTrackCompression compression;
128 MatroskaTrackEncryption encryption;
129 } MatroskaTrackEncoding;
131 typedef struct MatroskaTrackVideo {
133 uint64_t display_width;
134 uint64_t display_height;
135 uint64_t pixel_width;
136 uint64_t pixel_height;
138 uint64_t stereo_mode;
140 } MatroskaTrackVideo;
142 typedef struct MatroskaTrackAudio {
144 double out_samplerate;
148 /* real audio header (extracted from extradata) */
155 uint64_t buf_timecode;
157 } MatroskaTrackAudio;
159 typedef struct MatroskaTrackPlane {
162 } MatroskaTrackPlane;
164 typedef struct MatroskaTrackOperation {
165 EbmlList combine_planes;
166 } MatroskaTrackOperation;
168 typedef struct MatroskaTrack {
177 uint64_t default_duration;
178 uint64_t flag_default;
179 uint64_t flag_forced;
180 uint64_t seek_preroll;
181 MatroskaTrackVideo video;
182 MatroskaTrackAudio audio;
183 MatroskaTrackOperation operation;
185 uint64_t codec_delay;
188 int64_t end_timecode;
190 uint64_t max_block_additional_id;
193 typedef struct MatroskaAttachment {
200 } MatroskaAttachment;
202 typedef struct MatroskaChapter {
211 typedef struct MatroskaIndexPos {
216 typedef struct MatroskaIndex {
221 typedef struct MatroskaTag {
229 typedef struct MatroskaTagTarget {
237 typedef struct MatroskaTags {
238 MatroskaTagTarget target;
242 typedef struct MatroskaSeekhead {
247 typedef struct MatroskaLevel {
252 typedef struct MatroskaCluster {
257 typedef struct MatroskaLevel1Element {
261 } MatroskaLevel1Element;
263 typedef struct MatroskaDemuxContext {
264 const AVClass *class;
265 AVFormatContext *ctx;
269 MatroskaLevel levels[EBML_MAX_DEPTH];
279 EbmlList attachments;
285 /* byte position of the segment inside the stream */
286 int64_t segment_start;
288 /* the packet queue */
295 /* What to skip before effectively reading a packet. */
296 int skip_to_keyframe;
297 uint64_t skip_to_timecode;
299 /* File has a CUES element, but we defer parsing until it is needed. */
300 int cues_parsing_deferred;
302 /* Level1 elements and whether they were read yet */
303 MatroskaLevel1Element level1_elems[64];
304 int num_level1_elems;
306 int current_cluster_num_blocks;
307 int64_t current_cluster_pos;
308 MatroskaCluster current_cluster;
310 /* File has SSA subtitles which prevent incremental cluster parsing. */
313 /* WebM DASH Manifest live flag/ */
315 } MatroskaDemuxContext;
317 typedef struct MatroskaBlock {
322 uint64_t additional_id;
324 int64_t discard_padding;
327 static const EbmlSyntax ebml_header[] = {
328 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
329 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
330 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
331 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
332 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
333 { EBML_ID_EBMLVERSION, EBML_NONE },
334 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
338 static const EbmlSyntax ebml_syntax[] = {
339 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
343 static const EbmlSyntax matroska_info[] = {
344 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
345 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
346 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
347 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
348 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
349 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
350 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
354 static const EbmlSyntax matroska_track_video[] = {
355 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
356 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
357 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
358 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
359 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
360 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
361 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
362 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
363 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
364 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
365 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
366 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
367 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_NONE },
368 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
369 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
373 static const EbmlSyntax matroska_track_audio[] = {
374 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
375 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
376 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
377 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
381 static const EbmlSyntax matroska_track_encoding_compression[] = {
382 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
383 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
387 static const EbmlSyntax matroska_track_encoding_encryption[] = {
388 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
389 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
390 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
391 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
392 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
393 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
394 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
397 static const EbmlSyntax matroska_track_encoding[] = {
398 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
399 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
400 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
401 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
402 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
406 static const EbmlSyntax matroska_track_encodings[] = {
407 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
411 static const EbmlSyntax matroska_track_plane[] = {
412 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
413 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
417 static const EbmlSyntax matroska_track_combine_planes[] = {
418 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
422 static const EbmlSyntax matroska_track_operation[] = {
423 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
427 static const EbmlSyntax matroska_track[] = {
428 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
429 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
430 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
431 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
432 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
433 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
434 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
435 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
436 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
437 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
438 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
439 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
440 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
441 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
442 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
443 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
444 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
445 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
446 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
447 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
448 { MATROSKA_ID_CODECNAME, EBML_NONE },
449 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
450 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
451 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
452 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
453 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
457 static const EbmlSyntax matroska_tracks[] = {
458 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
462 static const EbmlSyntax matroska_attachment[] = {
463 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
464 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
465 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
466 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
467 { MATROSKA_ID_FILEDESC, EBML_NONE },
471 static const EbmlSyntax matroska_attachments[] = {
472 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
476 static const EbmlSyntax matroska_chapter_display[] = {
477 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
478 { MATROSKA_ID_CHAPLANG, EBML_NONE },
482 static const EbmlSyntax matroska_chapter_entry[] = {
483 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
484 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
485 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
486 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
487 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
488 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
489 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
490 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
494 static const EbmlSyntax matroska_chapter[] = {
495 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
496 { MATROSKA_ID_EDITIONUID, EBML_NONE },
497 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
498 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
499 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
503 static const EbmlSyntax matroska_chapters[] = {
504 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
508 static const EbmlSyntax matroska_index_pos[] = {
509 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
510 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
511 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
512 { MATROSKA_ID_CUEDURATION, EBML_NONE },
513 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
517 static const EbmlSyntax matroska_index_entry[] = {
518 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
519 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
523 static const EbmlSyntax matroska_index[] = {
524 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
528 static const EbmlSyntax matroska_simpletag[] = {
529 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
530 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
531 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
532 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
533 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
534 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
538 static const EbmlSyntax matroska_tagtargets[] = {
539 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
540 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
541 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
542 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
543 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
547 static const EbmlSyntax matroska_tag[] = {
548 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
549 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
553 static const EbmlSyntax matroska_tags[] = {
554 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
558 static const EbmlSyntax matroska_seekhead_entry[] = {
559 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
560 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
564 static const EbmlSyntax matroska_seekhead[] = {
565 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
569 static const EbmlSyntax matroska_segment[] = {
570 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
571 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
572 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
573 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
574 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
575 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
576 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
577 { MATROSKA_ID_CLUSTER, EBML_STOP },
581 static const EbmlSyntax matroska_segments[] = {
582 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
586 static const EbmlSyntax matroska_blockmore[] = {
587 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
588 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
592 static const EbmlSyntax matroska_blockadditions[] = {
593 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
597 static const EbmlSyntax matroska_blockgroup[] = {
598 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
599 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
600 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
601 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
602 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
603 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
604 { MATROSKA_ID_CODECSTATE, EBML_NONE },
605 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
609 static const EbmlSyntax matroska_cluster[] = {
610 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
611 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
612 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
613 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
614 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
618 static const EbmlSyntax matroska_clusters[] = {
619 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
620 { MATROSKA_ID_INFO, EBML_NONE },
621 { MATROSKA_ID_CUES, EBML_NONE },
622 { MATROSKA_ID_TAGS, EBML_NONE },
623 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
627 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
628 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
629 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
630 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
631 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
632 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
633 { MATROSKA_ID_INFO, EBML_NONE },
634 { MATROSKA_ID_CUES, EBML_NONE },
635 { MATROSKA_ID_TAGS, EBML_NONE },
636 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
637 { MATROSKA_ID_CLUSTER, EBML_STOP },
641 static const EbmlSyntax matroska_cluster_incremental[] = {
642 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
643 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
644 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
645 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
646 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
650 static const EbmlSyntax matroska_clusters_incremental[] = {
651 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
652 { MATROSKA_ID_INFO, EBML_NONE },
653 { MATROSKA_ID_CUES, EBML_NONE },
654 { MATROSKA_ID_TAGS, EBML_NONE },
655 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
659 static const char *const matroska_doctypes[] = { "matroska", "webm" };
661 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
663 AVIOContext *pb = matroska->ctx->pb;
665 matroska->current_id = 0;
666 matroska->num_levels = 0;
668 /* seek to next position to resync from */
669 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
674 // try to find a toplevel element
675 while (!avio_feof(pb)) {
676 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
677 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
678 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
679 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
680 matroska->current_id = id;
683 id = (id << 8) | avio_r8(pb);
692 * Return: Whether we reached the end of a level in the hierarchy or not.
694 static int ebml_level_end(MatroskaDemuxContext *matroska)
696 AVIOContext *pb = matroska->ctx->pb;
697 int64_t pos = avio_tell(pb);
699 if (matroska->num_levels > 0) {
700 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
701 if (pos - level->start >= level->length || matroska->current_id) {
702 matroska->num_levels--;
706 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
710 * Read: an "EBML number", which is defined as a variable-length
711 * array of bytes. The first byte indicates the length by giving a
712 * number of 0-bits followed by a one. The position of the first
713 * "one" bit inside the first byte indicates the length of this
715 * Returns: number of bytes read, < 0 on error
717 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
718 int max_size, uint64_t *number)
723 /* The first byte tells us the length in bytes - avio_r8() can normally
724 * return 0, but since that's not a valid first ebmlID byte, we can
725 * use it safely here to catch EOS. */
726 if (!(total = avio_r8(pb))) {
727 /* we might encounter EOS here */
728 if (!avio_feof(pb)) {
729 int64_t pos = avio_tell(pb);
730 av_log(matroska->ctx, AV_LOG_ERROR,
731 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
733 return pb->error ? pb->error : AVERROR(EIO);
738 /* get the length of the EBML number */
739 read = 8 - ff_log2_tab[total];
740 if (read > max_size) {
741 int64_t pos = avio_tell(pb) - 1;
742 av_log(matroska->ctx, AV_LOG_ERROR,
743 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
744 (uint8_t) total, pos, pos);
745 return AVERROR_INVALIDDATA;
748 /* read out length */
749 total ^= 1 << ff_log2_tab[total];
751 total = (total << 8) | avio_r8(pb);
759 * Read a EBML length value.
760 * This needs special handling for the "unknown length" case which has multiple
763 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
766 int res = ebml_read_num(matroska, pb, 8, number);
767 if (res > 0 && *number + 1 == 1ULL << (7 * res))
768 *number = 0xffffffffffffffULL;
773 * Read the next element as an unsigned int.
774 * 0 is success, < 0 is failure.
776 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
781 return AVERROR_INVALIDDATA;
783 /* big-endian ordering; build up number */
786 *num = (*num << 8) | avio_r8(pb);
792 * Read the next element as a signed int.
793 * 0 is success, < 0 is failure.
795 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
800 return AVERROR_INVALIDDATA;
805 *num = sign_extend(avio_r8(pb), 8);
807 /* big-endian ordering; build up number */
809 *num = (*num << 8) | avio_r8(pb);
816 * Read the next element as a float.
817 * 0 is success, < 0 is failure.
819 static int ebml_read_float(AVIOContext *pb, int size, double *num)
824 *num = av_int2float(avio_rb32(pb));
826 *num = av_int2double(avio_rb64(pb));
828 return AVERROR_INVALIDDATA;
834 * Read the next element as an ASCII string.
835 * 0 is success, < 0 is failure.
837 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
841 /* EBML strings are usually not 0-terminated, so we allocate one
842 * byte more, read the string and NULL-terminate it ourselves. */
843 if (!(res = av_malloc(size + 1)))
844 return AVERROR(ENOMEM);
845 if (avio_read(pb, (uint8_t *) res, size) != size) {
857 * Read the next element as binary data.
858 * 0 is success, < 0 is failure.
860 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
862 av_fast_padded_malloc(&bin->data, &bin->size, length);
864 return AVERROR(ENOMEM);
867 bin->pos = avio_tell(pb);
868 if (avio_read(pb, bin->data, length) != length) {
869 av_freep(&bin->data);
878 * Read the next element, but only the header. The contents
879 * are supposed to be sub-elements which can be read separately.
880 * 0 is success, < 0 is failure.
882 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
884 AVIOContext *pb = matroska->ctx->pb;
885 MatroskaLevel *level;
887 if (matroska->num_levels >= EBML_MAX_DEPTH) {
888 av_log(matroska->ctx, AV_LOG_ERROR,
889 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
890 return AVERROR(ENOSYS);
893 level = &matroska->levels[matroska->num_levels++];
894 level->start = avio_tell(pb);
895 level->length = length;
901 * Read signed/unsigned "EBML" numbers.
902 * Return: number of bytes processed, < 0 on error
904 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
905 uint8_t *data, uint32_t size, uint64_t *num)
908 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
909 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
913 * Same as above, but signed.
915 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
916 uint8_t *data, uint32_t size, int64_t *num)
921 /* read as unsigned number first */
922 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
925 /* make signed (weird way) */
926 *num = unum - ((1LL << (7 * res - 1)) - 1);
931 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
932 EbmlSyntax *syntax, void *data);
934 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
935 uint32_t id, void *data)
938 for (i = 0; syntax[i].id; i++)
939 if (id == syntax[i].id)
941 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
942 matroska->num_levels > 0 &&
943 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
944 return 0; // we reached the end of an unknown size cluster
945 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
946 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
948 return ebml_parse_elem(matroska, &syntax[i], data);
951 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
954 if (!matroska->current_id) {
956 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
958 // in live mode, finish parsing if EOF is reached.
959 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
960 res == AVERROR_EOF) ? 1 : res;
962 matroska->current_id = id | 1 << 7 * res;
964 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
967 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
972 for (i = 0; syntax[i].id; i++)
973 switch (syntax[i].type) {
975 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
978 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
982 // the default may be NULL
983 if (syntax[i].def.s) {
984 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
985 *dst = av_strdup(syntax[i].def.s);
987 return AVERROR(ENOMEM);
992 while (!res && !ebml_level_end(matroska))
993 res = ebml_parse(matroska, syntax, data);
999 * Allocate and return the entry for the level1 element with the given ID. If
1000 * an entry already exists, return the existing entry.
1002 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1006 MatroskaLevel1Element *elem;
1008 // Some files link to all clusters; useless.
1009 if (id == MATROSKA_ID_CLUSTER)
1012 // There can be multiple seekheads.
1013 if (id != MATROSKA_ID_SEEKHEAD) {
1014 for (i = 0; i < matroska->num_level1_elems; i++) {
1015 if (matroska->level1_elems[i].id == id)
1016 return &matroska->level1_elems[i];
1020 // Only a completely broken file would have more elements.
1021 // It also provides a low-effort way to escape from circular seekheads
1022 // (every iteration will add a level1 entry).
1023 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1024 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1028 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1029 *elem = (MatroskaLevel1Element){.id = id};
1034 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1035 EbmlSyntax *syntax, void *data)
1037 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1040 // max. 16 MB for strings
1041 [EBML_STR] = 0x1000000,
1042 [EBML_UTF8] = 0x1000000,
1043 // max. 256 MB for binary data
1044 [EBML_BIN] = 0x10000000,
1045 // no limits for anything else
1047 AVIOContext *pb = matroska->ctx->pb;
1048 uint32_t id = syntax->id;
1052 MatroskaLevel1Element *level1_elem;
1054 data = (char *) data + syntax->data_offset;
1055 if (syntax->list_elem_size) {
1056 EbmlList *list = data;
1057 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1059 return AVERROR(ENOMEM);
1060 list->elem = newelem;
1061 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1062 memset(data, 0, syntax->list_elem_size);
1066 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1067 matroska->current_id = 0;
1068 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1070 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1071 av_log(matroska->ctx, AV_LOG_ERROR,
1072 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1073 length, max_lengths[syntax->type], syntax->type);
1074 return AVERROR_INVALIDDATA;
1078 switch (syntax->type) {
1080 res = ebml_read_uint(pb, length, data);
1083 res = ebml_read_sint(pb, length, data);
1086 res = ebml_read_float(pb, length, data);
1090 res = ebml_read_ascii(pb, length, data);
1093 res = ebml_read_binary(pb, length, data);
1097 if ((res = ebml_read_master(matroska, length)) < 0)
1099 if (id == MATROSKA_ID_SEGMENT)
1100 matroska->segment_start = avio_tell(matroska->ctx->pb);
1101 if (id == MATROSKA_ID_CUES)
1102 matroska->cues_parsing_deferred = 0;
1103 if (syntax->type == EBML_LEVEL1 &&
1104 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1105 if (level1_elem->parsed)
1106 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1107 level1_elem->parsed = 1;
1109 return ebml_parse_nest(matroska, syntax->def.n, data);
1111 return ebml_parse_id(matroska, syntax->def.n, id, data);
1115 if (ffio_limit(pb, length) != length)
1116 return AVERROR(EIO);
1117 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1119 if (res == AVERROR_INVALIDDATA)
1120 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1121 else if (res == AVERROR(EIO))
1122 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1126 static void ebml_free(EbmlSyntax *syntax, void *data)
1129 for (i = 0; syntax[i].id; i++) {
1130 void *data_off = (char *) data + syntax[i].data_offset;
1131 switch (syntax[i].type) {
1137 av_freep(&((EbmlBin *) data_off)->data);
1141 if (syntax[i].list_elem_size) {
1142 EbmlList *list = data_off;
1143 char *ptr = list->elem;
1144 for (j = 0; j < list->nb_elem;
1145 j++, ptr += syntax[i].list_elem_size)
1146 ebml_free(syntax[i].def.n, ptr);
1147 av_freep(&list->elem);
1149 ebml_free(syntax[i].def.n, data_off);
1159 static int matroska_probe(AVProbeData *p)
1162 int len_mask = 0x80, size = 1, n = 1, i;
1165 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1168 /* length of header */
1170 while (size <= 8 && !(total & len_mask)) {
1176 total &= (len_mask - 1);
1178 total = (total << 8) | p->buf[4 + n++];
1180 /* Does the probe data contain the whole header? */
1181 if (p->buf_size < 4 + size + total)
1184 /* The header should contain a known document type. For now,
1185 * we don't parse the whole header but simply check for the
1186 * availability of that array of characters inside the header.
1187 * Not fully fool-proof, but good enough. */
1188 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1189 size_t probelen = strlen(matroska_doctypes[i]);
1190 if (total < probelen)
1192 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1193 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1194 return AVPROBE_SCORE_MAX;
1197 // probably valid EBML header but no recognized doctype
1198 return AVPROBE_SCORE_EXTENSION;
1201 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1204 MatroskaTrack *tracks = matroska->tracks.elem;
1207 for (i = 0; i < matroska->tracks.nb_elem; i++)
1208 if (tracks[i].num == num)
1211 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1215 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1216 MatroskaTrack *track)
1218 MatroskaTrackEncoding *encodings = track->encodings.elem;
1219 uint8_t *data = *buf;
1220 int isize = *buf_size;
1221 uint8_t *pkt_data = NULL;
1222 uint8_t av_unused *newpktdata;
1223 int pkt_size = isize;
1227 if (pkt_size >= 10000000U)
1228 return AVERROR_INVALIDDATA;
1230 switch (encodings[0].compression.algo) {
1231 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1233 int header_size = encodings[0].compression.settings.size;
1234 uint8_t *header = encodings[0].compression.settings.data;
1236 if (header_size && !header) {
1237 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1244 pkt_size = isize + header_size;
1245 pkt_data = av_malloc(pkt_size);
1247 return AVERROR(ENOMEM);
1249 memcpy(pkt_data, header, header_size);
1250 memcpy(pkt_data + header_size, data, isize);
1254 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1256 olen = pkt_size *= 3;
1257 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1259 result = AVERROR(ENOMEM);
1262 pkt_data = newpktdata;
1263 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1264 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1266 result = AVERROR_INVALIDDATA;
1273 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1275 z_stream zstream = { 0 };
1276 if (inflateInit(&zstream) != Z_OK)
1278 zstream.next_in = data;
1279 zstream.avail_in = isize;
1282 newpktdata = av_realloc(pkt_data, pkt_size);
1284 inflateEnd(&zstream);
1285 result = AVERROR(ENOMEM);
1288 pkt_data = newpktdata;
1289 zstream.avail_out = pkt_size - zstream.total_out;
1290 zstream.next_out = pkt_data + zstream.total_out;
1291 result = inflate(&zstream, Z_NO_FLUSH);
1292 } while (result == Z_OK && pkt_size < 10000000);
1293 pkt_size = zstream.total_out;
1294 inflateEnd(&zstream);
1295 if (result != Z_STREAM_END) {
1296 if (result == Z_MEM_ERROR)
1297 result = AVERROR(ENOMEM);
1299 result = AVERROR_INVALIDDATA;
1306 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1308 bz_stream bzstream = { 0 };
1309 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1311 bzstream.next_in = data;
1312 bzstream.avail_in = isize;
1315 newpktdata = av_realloc(pkt_data, pkt_size);
1317 BZ2_bzDecompressEnd(&bzstream);
1318 result = AVERROR(ENOMEM);
1321 pkt_data = newpktdata;
1322 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1323 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1324 result = BZ2_bzDecompress(&bzstream);
1325 } while (result == BZ_OK && pkt_size < 10000000);
1326 pkt_size = bzstream.total_out_lo32;
1327 BZ2_bzDecompressEnd(&bzstream);
1328 if (result != BZ_STREAM_END) {
1329 if (result == BZ_MEM_ERROR)
1330 result = AVERROR(ENOMEM);
1332 result = AVERROR_INVALIDDATA;
1339 return AVERROR_INVALIDDATA;
1343 *buf_size = pkt_size;
1351 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1352 AVDictionary **metadata, char *prefix)
1354 MatroskaTag *tags = list->elem;
1358 for (i = 0; i < list->nb_elem; i++) {
1359 const char *lang = tags[i].lang &&
1360 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1362 if (!tags[i].name) {
1363 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1367 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1369 av_strlcpy(key, tags[i].name, sizeof(key));
1370 if (tags[i].def || !lang) {
1371 av_dict_set(metadata, key, tags[i].string, 0);
1372 if (tags[i].sub.nb_elem)
1373 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1376 av_strlcat(key, "-", sizeof(key));
1377 av_strlcat(key, lang, sizeof(key));
1378 av_dict_set(metadata, key, tags[i].string, 0);
1379 if (tags[i].sub.nb_elem)
1380 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1383 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1386 static void matroska_convert_tags(AVFormatContext *s)
1388 MatroskaDemuxContext *matroska = s->priv_data;
1389 MatroskaTags *tags = matroska->tags.elem;
1392 for (i = 0; i < matroska->tags.nb_elem; i++) {
1393 if (tags[i].target.attachuid) {
1394 MatroskaAttachment *attachment = matroska->attachments.elem;
1395 for (j = 0; j < matroska->attachments.nb_elem; j++)
1396 if (attachment[j].uid == tags[i].target.attachuid &&
1397 attachment[j].stream)
1398 matroska_convert_tag(s, &tags[i].tag,
1399 &attachment[j].stream->metadata, NULL);
1400 } else if (tags[i].target.chapteruid) {
1401 MatroskaChapter *chapter = matroska->chapters.elem;
1402 for (j = 0; j < matroska->chapters.nb_elem; j++)
1403 if (chapter[j].uid == tags[i].target.chapteruid &&
1405 matroska_convert_tag(s, &tags[i].tag,
1406 &chapter[j].chapter->metadata, NULL);
1407 } else if (tags[i].target.trackuid) {
1408 MatroskaTrack *track = matroska->tracks.elem;
1409 for (j = 0; j < matroska->tracks.nb_elem; j++)
1410 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1411 matroska_convert_tag(s, &tags[i].tag,
1412 &track[j].stream->metadata, NULL);
1414 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1415 tags[i].target.type);
1420 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1423 uint32_t level_up = matroska->level_up;
1424 uint32_t saved_id = matroska->current_id;
1425 int64_t before_pos = avio_tell(matroska->ctx->pb);
1426 MatroskaLevel level;
1431 offset = pos + matroska->segment_start;
1432 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1433 /* We don't want to lose our seekhead level, so we add
1434 * a dummy. This is a crude hack. */
1435 if (matroska->num_levels == EBML_MAX_DEPTH) {
1436 av_log(matroska->ctx, AV_LOG_INFO,
1437 "Max EBML element depth (%d) reached, "
1438 "cannot parse further.\n", EBML_MAX_DEPTH);
1439 ret = AVERROR_INVALIDDATA;
1442 level.length = (uint64_t) -1;
1443 matroska->levels[matroska->num_levels] = level;
1444 matroska->num_levels++;
1445 matroska->current_id = 0;
1447 ret = ebml_parse(matroska, matroska_segment, matroska);
1449 /* remove dummy level */
1450 while (matroska->num_levels) {
1451 uint64_t length = matroska->levels[--matroska->num_levels].length;
1452 if (length == (uint64_t) -1)
1458 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1459 matroska->level_up = level_up;
1460 matroska->current_id = saved_id;
1465 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1467 EbmlList *seekhead_list = &matroska->seekhead;
1470 // we should not do any seeking in the streaming case
1471 if (!matroska->ctx->pb->seekable)
1474 for (i = 0; i < seekhead_list->nb_elem; i++) {
1475 MatroskaSeekhead *seekheads = seekhead_list->elem;
1476 uint32_t id = seekheads[i].id;
1477 uint64_t pos = seekheads[i].pos;
1479 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1480 if (!elem || elem->parsed)
1485 // defer cues parsing until we actually need cue data.
1486 if (id == MATROSKA_ID_CUES)
1489 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1490 // mark index as broken
1491 matroska->cues_parsing_deferred = -1;
1499 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1501 EbmlList *index_list;
1502 MatroskaIndex *index;
1503 uint64_t index_scale = 1;
1506 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1509 index_list = &matroska->index;
1510 index = index_list->elem;
1511 if (index_list->nb_elem &&
1512 index[0].time > 1E14 / matroska->time_scale) {
1513 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1514 index_scale = matroska->time_scale;
1516 for (i = 0; i < index_list->nb_elem; i++) {
1517 EbmlList *pos_list = &index[i].pos;
1518 MatroskaIndexPos *pos = pos_list->elem;
1519 for (j = 0; j < pos_list->nb_elem; j++) {
1520 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1522 if (track && track->stream)
1523 av_add_index_entry(track->stream,
1524 pos[j].pos + matroska->segment_start,
1525 index[i].time / index_scale, 0, 0,
1531 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1534 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1537 for (i = 0; i < matroska->num_level1_elems; i++) {
1538 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1539 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1540 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1541 matroska->cues_parsing_deferred = -1;
1547 matroska_add_index_entries(matroska);
1550 static int matroska_aac_profile(char *codec_id)
1552 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1555 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1556 if (strstr(codec_id, aac_profiles[profile]))
1561 static int matroska_aac_sri(int samplerate)
1565 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1566 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1571 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1574 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1575 time_t creation_time = date_utc / 1000000000 + 978307200;
1576 struct tm tmpbuf, *ptm = gmtime_r(&creation_time, &tmpbuf);
1578 if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1579 av_dict_set(metadata, "creation_time", buffer, 0);
1582 static int matroska_parse_flac(AVFormatContext *s,
1583 MatroskaTrack *track,
1586 AVStream *st = track->stream;
1587 uint8_t *p = track->codec_priv.data;
1588 int size = track->codec_priv.size;
1590 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1591 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1592 track->codec_priv.size = 0;
1596 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1598 p += track->codec_priv.size;
1599 size -= track->codec_priv.size;
1601 /* parse the remaining metadata blocks if present */
1603 int block_last, block_type, block_size;
1605 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1609 if (block_size > size)
1612 /* check for the channel mask */
1613 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1614 AVDictionary *dict = NULL;
1615 AVDictionaryEntry *chmask;
1617 ff_vorbis_comment(s, &dict, p, block_size, 0);
1618 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1620 uint64_t mask = strtol(chmask->value, NULL, 0);
1621 if (!mask || mask & ~0x3ffffULL) {
1622 av_log(s, AV_LOG_WARNING,
1623 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1625 st->codec->channel_layout = mask;
1627 av_dict_free(&dict);
1637 static int matroska_parse_tracks(AVFormatContext *s)
1639 MatroskaDemuxContext *matroska = s->priv_data;
1640 MatroskaTrack *tracks = matroska->tracks.elem;
1645 for (i = 0; i < matroska->tracks.nb_elem; i++) {
1646 MatroskaTrack *track = &tracks[i];
1647 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1648 EbmlList *encodings_list = &track->encodings;
1649 MatroskaTrackEncoding *encodings = encodings_list->elem;
1650 uint8_t *extradata = NULL;
1651 int extradata_size = 0;
1652 int extradata_offset = 0;
1653 uint32_t fourcc = 0;
1655 char* key_id_base64 = NULL;
1658 /* Apply some sanity checks. */
1659 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1660 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1661 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1662 track->type != MATROSKA_TRACK_TYPE_METADATA) {
1663 av_log(matroska->ctx, AV_LOG_INFO,
1664 "Unknown or unsupported track type %"PRIu64"\n",
1668 if (!track->codec_id)
1671 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1672 if (!track->default_duration && track->video.frame_rate > 0)
1673 track->default_duration = 1000000000 / track->video.frame_rate;
1674 if (track->video.display_width == -1)
1675 track->video.display_width = track->video.pixel_width;
1676 if (track->video.display_height == -1)
1677 track->video.display_height = track->video.pixel_height;
1678 if (track->video.color_space.size == 4)
1679 fourcc = AV_RL32(track->video.color_space.data);
1680 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1681 if (!track->audio.out_samplerate)
1682 track->audio.out_samplerate = track->audio.samplerate;
1684 if (encodings_list->nb_elem > 1) {
1685 av_log(matroska->ctx, AV_LOG_ERROR,
1686 "Multiple combined encodings not supported");
1687 } else if (encodings_list->nb_elem == 1) {
1688 if (encodings[0].type) {
1689 if (encodings[0].encryption.key_id.size > 0) {
1690 /* Save the encryption key id to be stored later as a
1692 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1693 key_id_base64 = av_malloc(b64_size);
1694 if (key_id_base64 == NULL)
1695 return AVERROR(ENOMEM);
1697 av_base64_encode(key_id_base64, b64_size,
1698 encodings[0].encryption.key_id.data,
1699 encodings[0].encryption.key_id.size);
1701 encodings[0].scope = 0;
1702 av_log(matroska->ctx, AV_LOG_ERROR,
1703 "Unsupported encoding type");
1707 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1710 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1713 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1715 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
1716 encodings[0].scope = 0;
1717 av_log(matroska->ctx, AV_LOG_ERROR,
1718 "Unsupported encoding type");
1719 } else if (track->codec_priv.size && encodings[0].scope & 2) {
1720 uint8_t *codec_priv = track->codec_priv.data;
1721 int ret = matroska_decode_buffer(&track->codec_priv.data,
1722 &track->codec_priv.size,
1725 track->codec_priv.data = NULL;
1726 track->codec_priv.size = 0;
1727 av_log(matroska->ctx, AV_LOG_ERROR,
1728 "Failed to decode codec private data\n");
1731 if (codec_priv != track->codec_priv.data)
1732 av_free(codec_priv);
1736 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1737 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1738 strlen(ff_mkv_codec_tags[j].str))) {
1739 codec_id = ff_mkv_codec_tags[j].id;
1744 st = track->stream = avformat_new_stream(s, NULL);
1746 av_free(key_id_base64);
1747 return AVERROR(ENOMEM);
1750 if (key_id_base64) {
1751 /* export encryption key id as base64 metadata tag */
1752 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
1753 av_freep(&key_id_base64);
1756 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1757 track->codec_priv.size >= 40 &&
1758 track->codec_priv.data) {
1759 track->ms_compat = 1;
1760 bit_depth = AV_RL16(track->codec_priv.data + 14);
1761 fourcc = AV_RL32(track->codec_priv.data + 16);
1762 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
1765 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
1767 extradata_offset = 40;
1768 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1769 track->codec_priv.size >= 14 &&
1770 track->codec_priv.data) {
1772 ffio_init_context(&b, track->codec_priv.data,
1773 track->codec_priv.size,
1774 0, NULL, NULL, NULL, NULL);
1775 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size, 0);
1778 codec_id = st->codec->codec_id;
1779 extradata_offset = FFMIN(track->codec_priv.size, 18);
1780 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
1781 && (track->codec_priv.size >= 86)
1782 && (track->codec_priv.data)) {
1783 fourcc = AV_RL32(track->codec_priv.data + 4);
1784 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1785 if (ff_codec_get_id(ff_codec_movaudio_tags, AV_RL32(track->codec_priv.data))) {
1786 fourcc = AV_RL32(track->codec_priv.data);
1787 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1789 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1790 (track->codec_priv.size >= 21) &&
1791 (track->codec_priv.data)) {
1792 fourcc = AV_RL32(track->codec_priv.data + 4);
1793 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1794 if (ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(track->codec_priv.data))) {
1795 fourcc = AV_RL32(track->codec_priv.data);
1796 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1798 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI "))
1799 codec_id = AV_CODEC_ID_SVQ3;
1800 if (codec_id == AV_CODEC_ID_NONE) {
1802 av_get_codec_tag_string(buf, sizeof(buf), fourcc);
1803 av_log(matroska->ctx, AV_LOG_ERROR,
1804 "mov FourCC not found %s.\n", buf);
1806 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1807 switch (track->audio.bitdepth) {
1809 codec_id = AV_CODEC_ID_PCM_U8;
1812 codec_id = AV_CODEC_ID_PCM_S24BE;
1815 codec_id = AV_CODEC_ID_PCM_S32BE;
1818 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1819 switch (track->audio.bitdepth) {
1821 codec_id = AV_CODEC_ID_PCM_U8;
1824 codec_id = AV_CODEC_ID_PCM_S24LE;
1827 codec_id = AV_CODEC_ID_PCM_S32LE;
1830 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1831 track->audio.bitdepth == 64) {
1832 codec_id = AV_CODEC_ID_PCM_F64LE;
1833 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1834 int profile = matroska_aac_profile(track->codec_id);
1835 int sri = matroska_aac_sri(track->audio.samplerate);
1836 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1838 return AVERROR(ENOMEM);
1839 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1840 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1841 if (strstr(track->codec_id, "SBR")) {
1842 sri = matroska_aac_sri(track->audio.out_samplerate);
1843 extradata[2] = 0x56;
1844 extradata[3] = 0xE5;
1845 extradata[4] = 0x80 | (sri << 3);
1849 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - FF_INPUT_BUFFER_PADDING_SIZE) {
1850 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1851 * Create the "atom size", "tag", and "tag version" fields the
1852 * decoder expects manually. */
1853 extradata_size = 12 + track->codec_priv.size;
1854 extradata = av_mallocz(extradata_size +
1855 FF_INPUT_BUFFER_PADDING_SIZE);
1857 return AVERROR(ENOMEM);
1858 AV_WB32(extradata, extradata_size);
1859 memcpy(&extradata[4], "alac", 4);
1860 AV_WB32(&extradata[8], 0);
1861 memcpy(&extradata[12], track->codec_priv.data,
1862 track->codec_priv.size);
1863 } else if (codec_id == AV_CODEC_ID_TTA) {
1864 extradata_size = 30;
1865 extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1867 return AVERROR(ENOMEM);
1868 ffio_init_context(&b, extradata, extradata_size, 1,
1869 NULL, NULL, NULL, NULL);
1870 avio_write(&b, "TTA1", 4);
1872 avio_wl16(&b, track->audio.channels);
1873 avio_wl16(&b, track->audio.bitdepth);
1874 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
1875 return AVERROR_INVALIDDATA;
1876 avio_wl32(&b, track->audio.out_samplerate);
1877 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
1878 track->audio.out_samplerate,
1879 AV_TIME_BASE * 1000));
1880 } else if (codec_id == AV_CODEC_ID_RV10 ||
1881 codec_id == AV_CODEC_ID_RV20 ||
1882 codec_id == AV_CODEC_ID_RV30 ||
1883 codec_id == AV_CODEC_ID_RV40) {
1884 extradata_offset = 26;
1885 } else if (codec_id == AV_CODEC_ID_RA_144) {
1886 track->audio.out_samplerate = 8000;
1887 track->audio.channels = 1;
1888 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
1889 codec_id == AV_CODEC_ID_COOK ||
1890 codec_id == AV_CODEC_ID_ATRAC3 ||
1891 codec_id == AV_CODEC_ID_SIPR)
1892 && track->codec_priv.data) {
1895 ffio_init_context(&b, track->codec_priv.data,
1896 track->codec_priv.size,
1897 0, NULL, NULL, NULL, NULL);
1899 flavor = avio_rb16(&b);
1900 track->audio.coded_framesize = avio_rb32(&b);
1902 track->audio.sub_packet_h = avio_rb16(&b);
1903 track->audio.frame_size = avio_rb16(&b);
1904 track->audio.sub_packet_size = avio_rb16(&b);
1906 track->audio.coded_framesize <= 0 ||
1907 track->audio.sub_packet_h <= 0 ||
1908 track->audio.frame_size <= 0 ||
1909 track->audio.sub_packet_size <= 0)
1910 return AVERROR_INVALIDDATA;
1911 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
1912 track->audio.frame_size);
1913 if (!track->audio.buf)
1914 return AVERROR(ENOMEM);
1915 if (codec_id == AV_CODEC_ID_RA_288) {
1916 st->codec->block_align = track->audio.coded_framesize;
1917 track->codec_priv.size = 0;
1919 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1920 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1921 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1922 st->codec->bit_rate = sipr_bit_rate[flavor];
1924 st->codec->block_align = track->audio.sub_packet_size;
1925 extradata_offset = 78;
1927 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1928 ret = matroska_parse_flac(s, track, &extradata_offset);
1931 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
1932 fourcc = AV_RL32(track->codec_priv.data);
1934 track->codec_priv.size -= extradata_offset;
1936 if (codec_id == AV_CODEC_ID_NONE)
1937 av_log(matroska->ctx, AV_LOG_INFO,
1938 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1940 if (track->time_scale < 0.01)
1941 track->time_scale = 1.0;
1942 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1943 1000 * 1000 * 1000); /* 64 bit pts in ns */
1945 /* convert the delay from ns to the track timebase */
1946 track->codec_delay = av_rescale_q(track->codec_delay,
1947 (AVRational){ 1, 1000000000 },
1950 st->codec->codec_id = codec_id;
1952 if (strcmp(track->language, "und"))
1953 av_dict_set(&st->metadata, "language", track->language, 0);
1954 av_dict_set(&st->metadata, "title", track->name, 0);
1956 if (track->flag_default)
1957 st->disposition |= AV_DISPOSITION_DEFAULT;
1958 if (track->flag_forced)
1959 st->disposition |= AV_DISPOSITION_FORCED;
1961 if (!st->codec->extradata) {
1963 st->codec->extradata = extradata;
1964 st->codec->extradata_size = extradata_size;
1965 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1966 if (ff_alloc_extradata(st->codec, track->codec_priv.size))
1967 return AVERROR(ENOMEM);
1968 memcpy(st->codec->extradata,
1969 track->codec_priv.data + extradata_offset,
1970 track->codec_priv.size);
1974 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1975 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
1977 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1978 st->codec->codec_tag = fourcc;
1980 st->codec->bits_per_coded_sample = bit_depth;
1981 st->codec->width = track->video.pixel_width;
1982 st->codec->height = track->video.pixel_height;
1983 av_reduce(&st->sample_aspect_ratio.num,
1984 &st->sample_aspect_ratio.den,
1985 st->codec->height * track->video.display_width,
1986 st->codec->width * track->video.display_height,
1988 if (st->codec->codec_id != AV_CODEC_ID_HEVC)
1989 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1991 if (track->default_duration) {
1992 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1993 1000000000, track->default_duration, 30000);
1994 #if FF_API_R_FRAME_RATE
1995 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
1996 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
1997 st->r_frame_rate = st->avg_frame_rate;
2001 /* export stereo mode flag as metadata tag */
2002 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2003 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2005 /* export alpha mode flag as metadata tag */
2006 if (track->video.alpha_mode)
2007 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2009 /* if we have virtual track, mark the real tracks */
2010 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2012 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2014 snprintf(buf, sizeof(buf), "%s_%d",
2015 ff_matroska_video_stereo_plane[planes[j].type], i);
2016 for (k=0; k < matroska->tracks.nb_elem; k++)
2017 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2018 av_dict_set(&tracks[k].stream->metadata,
2019 "stereo_mode", buf, 0);
2023 // add stream level stereo3d side data if it is a supported format
2024 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2025 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2026 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2030 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2031 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
2032 st->codec->sample_rate = track->audio.out_samplerate;
2033 st->codec->channels = track->audio.channels;
2034 if (!st->codec->bits_per_coded_sample)
2035 st->codec->bits_per_coded_sample = track->audio.bitdepth;
2036 if (st->codec->codec_id != AV_CODEC_ID_AAC)
2037 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2038 if (track->codec_delay > 0) {
2039 st->codec->delay = av_rescale_q(track->codec_delay,
2041 (AVRational){1, st->codec->sample_rate});
2043 if (track->seek_preroll > 0) {
2044 av_codec_set_seek_preroll(st->codec,
2045 av_rescale_q(track->seek_preroll,
2046 (AVRational){1, 1000000000},
2047 (AVRational){1, st->codec->sample_rate}));
2049 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2050 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2052 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2053 st->disposition |= AV_DISPOSITION_CAPTIONS;
2054 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2055 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2056 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2057 st->disposition |= AV_DISPOSITION_METADATA;
2059 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2060 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2061 if (st->codec->codec_id == AV_CODEC_ID_ASS)
2062 matroska->contains_ssa = 1;
2069 static int matroska_read_header(AVFormatContext *s)
2071 MatroskaDemuxContext *matroska = s->priv_data;
2072 EbmlList *attachments_list = &matroska->attachments;
2073 EbmlList *chapters_list = &matroska->chapters;
2074 MatroskaAttachment *attachments;
2075 MatroskaChapter *chapters;
2076 uint64_t max_start = 0;
2082 matroska->cues_parsing_deferred = 1;
2084 /* First read the EBML header. */
2085 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2086 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2087 ebml_free(ebml_syntax, &ebml);
2088 return AVERROR_INVALIDDATA;
2090 if (ebml.version > EBML_VERSION ||
2091 ebml.max_size > sizeof(uint64_t) ||
2092 ebml.id_length > sizeof(uint32_t) ||
2093 ebml.doctype_version > 3) {
2094 av_log(matroska->ctx, AV_LOG_ERROR,
2095 "EBML header using unsupported features\n"
2096 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2097 ebml.version, ebml.doctype, ebml.doctype_version);
2098 ebml_free(ebml_syntax, &ebml);
2099 return AVERROR_PATCHWELCOME;
2100 } else if (ebml.doctype_version == 3) {
2101 av_log(matroska->ctx, AV_LOG_WARNING,
2102 "EBML header using unsupported features\n"
2103 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2104 ebml.version, ebml.doctype, ebml.doctype_version);
2106 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2107 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2109 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2110 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2111 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2112 ebml_free(ebml_syntax, &ebml);
2113 return AVERROR_INVALIDDATA;
2116 ebml_free(ebml_syntax, &ebml);
2118 /* The next thing is a segment. */
2119 pos = avio_tell(matroska->ctx->pb);
2120 res = ebml_parse(matroska, matroska_segments, matroska);
2121 // try resyncing until we find a EBML_STOP type element.
2123 res = matroska_resync(matroska, pos);
2126 pos = avio_tell(matroska->ctx->pb);
2127 res = ebml_parse(matroska, matroska_segment, matroska);
2129 matroska_execute_seekhead(matroska);
2131 if (!matroska->time_scale)
2132 matroska->time_scale = 1000000;
2133 if (matroska->duration)
2134 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2135 1000 / AV_TIME_BASE;
2136 av_dict_set(&s->metadata, "title", matroska->title, 0);
2137 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2139 if (matroska->date_utc.size == 8)
2140 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2142 res = matroska_parse_tracks(s);
2146 attachments = attachments_list->elem;
2147 for (j = 0; j < attachments_list->nb_elem; j++) {
2148 if (!(attachments[j].filename && attachments[j].mime &&
2149 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2150 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2152 AVStream *st = avformat_new_stream(s, NULL);
2155 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2156 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2157 st->codec->codec_id = AV_CODEC_ID_NONE;
2159 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2160 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2161 strlen(ff_mkv_image_mime_tags[i].str))) {
2162 st->codec->codec_id = ff_mkv_image_mime_tags[i].id;
2167 attachments[j].stream = st;
2169 if (st->codec->codec_id != AV_CODEC_ID_NONE) {
2170 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2171 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
2173 av_init_packet(&st->attached_pic);
2174 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2176 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2177 st->attached_pic.stream_index = st->index;
2178 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2180 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2181 if (ff_alloc_extradata(st->codec, attachments[j].bin.size))
2183 memcpy(st->codec->extradata, attachments[j].bin.data,
2184 attachments[j].bin.size);
2186 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2187 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2188 strlen(ff_mkv_mime_tags[i].str))) {
2189 st->codec->codec_id = ff_mkv_mime_tags[i].id;
2197 chapters = chapters_list->elem;
2198 for (i = 0; i < chapters_list->nb_elem; i++)
2199 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2200 (max_start == 0 || chapters[i].start > max_start)) {
2201 chapters[i].chapter =
2202 avpriv_new_chapter(s, chapters[i].uid,
2203 (AVRational) { 1, 1000000000 },
2204 chapters[i].start, chapters[i].end,
2206 if (chapters[i].chapter) {
2207 av_dict_set(&chapters[i].chapter->metadata,
2208 "title", chapters[i].title, 0);
2210 max_start = chapters[i].start;
2213 matroska_add_index_entries(matroska);
2215 matroska_convert_tags(s);
2221 * Put one packet in an application-supplied AVPacket struct.
2222 * Returns 0 on success or -1 on failure.
2224 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2227 if (matroska->num_packets > 0) {
2228 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2229 av_freep(&matroska->packets[0]);
2230 if (matroska->num_packets > 1) {
2232 memmove(&matroska->packets[0], &matroska->packets[1],
2233 (matroska->num_packets - 1) * sizeof(AVPacket *));
2234 newpackets = av_realloc(matroska->packets,
2235 (matroska->num_packets - 1) *
2236 sizeof(AVPacket *));
2238 matroska->packets = newpackets;
2240 av_freep(&matroska->packets);
2241 matroska->prev_pkt = NULL;
2243 matroska->num_packets--;
2251 * Free all packets in our internal queue.
2253 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2255 matroska->prev_pkt = NULL;
2256 if (matroska->packets) {
2258 for (n = 0; n < matroska->num_packets; n++) {
2259 av_free_packet(matroska->packets[n]);
2260 av_freep(&matroska->packets[n]);
2262 av_freep(&matroska->packets);
2263 matroska->num_packets = 0;
2267 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2268 int *buf_size, int type,
2269 uint32_t **lace_buf, int *laces)
2271 int res = 0, n, size = *buf_size;
2272 uint8_t *data = *buf;
2273 uint32_t *lace_size;
2277 *lace_buf = av_mallocz(sizeof(int));
2279 return AVERROR(ENOMEM);
2281 *lace_buf[0] = size;
2285 av_assert0(size > 0);
2289 lace_size = av_mallocz(*laces * sizeof(int));
2291 return AVERROR(ENOMEM);
2294 case 0x1: /* Xiph lacing */
2298 for (n = 0; res == 0 && n < *laces - 1; n++) {
2300 if (size <= total) {
2301 res = AVERROR_INVALIDDATA;
2306 lace_size[n] += temp;
2313 if (size <= total) {
2314 res = AVERROR_INVALIDDATA;
2318 lace_size[n] = size - total;
2322 case 0x2: /* fixed-size lacing */
2323 if (size % (*laces)) {
2324 res = AVERROR_INVALIDDATA;
2327 for (n = 0; n < *laces; n++)
2328 lace_size[n] = size / *laces;
2331 case 0x3: /* EBML lacing */
2335 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2336 if (n < 0 || num > INT_MAX) {
2337 av_log(matroska->ctx, AV_LOG_INFO,
2338 "EBML block data error\n");
2339 res = n<0 ? n : AVERROR_INVALIDDATA;
2344 total = lace_size[0] = num;
2345 for (n = 1; res == 0 && n < *laces - 1; n++) {
2348 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2349 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2350 av_log(matroska->ctx, AV_LOG_INFO,
2351 "EBML block data error\n");
2352 res = r<0 ? r : AVERROR_INVALIDDATA;
2357 lace_size[n] = lace_size[n - 1] + snum;
2358 total += lace_size[n];
2360 if (size <= total) {
2361 res = AVERROR_INVALIDDATA;
2364 lace_size[*laces - 1] = size - total;
2370 *lace_buf = lace_size;
2376 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2377 MatroskaTrack *track, AVStream *st,
2378 uint8_t *data, int size, uint64_t timecode,
2381 int a = st->codec->block_align;
2382 int sps = track->audio.sub_packet_size;
2383 int cfs = track->audio.coded_framesize;
2384 int h = track->audio.sub_packet_h;
2385 int y = track->audio.sub_packet_cnt;
2386 int w = track->audio.frame_size;
2389 if (!track->audio.pkt_cnt) {
2390 if (track->audio.sub_packet_cnt == 0)
2391 track->audio.buf_timecode = timecode;
2392 if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2393 if (size < cfs * h / 2) {
2394 av_log(matroska->ctx, AV_LOG_ERROR,
2395 "Corrupt int4 RM-style audio packet size\n");
2396 return AVERROR_INVALIDDATA;
2398 for (x = 0; x < h / 2; x++)
2399 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2400 data + x * cfs, cfs);
2401 } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2403 av_log(matroska->ctx, AV_LOG_ERROR,
2404 "Corrupt sipr RM-style audio packet size\n");
2405 return AVERROR_INVALIDDATA;
2407 memcpy(track->audio.buf + y * w, data, w);
2409 if (size < sps * w / sps || h<=0 || w%sps) {
2410 av_log(matroska->ctx, AV_LOG_ERROR,
2411 "Corrupt generic RM-style audio packet size\n");
2412 return AVERROR_INVALIDDATA;
2414 for (x = 0; x < w / sps; x++)
2415 memcpy(track->audio.buf +
2416 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2417 data + x * sps, sps);
2420 if (++track->audio.sub_packet_cnt >= h) {
2421 if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2422 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2423 track->audio.sub_packet_cnt = 0;
2424 track->audio.pkt_cnt = h * w / a;
2428 while (track->audio.pkt_cnt) {
2430 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2432 return AVERROR(ENOMEM);
2434 ret = av_new_packet(pkt, a);
2440 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2442 pkt->pts = track->audio.buf_timecode;
2443 track->audio.buf_timecode = AV_NOPTS_VALUE;
2445 pkt->stream_index = st->index;
2446 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2452 /* reconstruct full wavpack blocks from mangled matroska ones */
2453 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2454 uint8_t **pdst, int *size)
2456 uint8_t *dst = NULL;
2461 int ret, offset = 0;
2463 if (srclen < 12 || track->stream->codec->extradata_size < 2)
2464 return AVERROR_INVALIDDATA;
2466 ver = AV_RL16(track->stream->codec->extradata);
2468 samples = AV_RL32(src);
2472 while (srclen >= 8) {
2477 uint32_t flags = AV_RL32(src);
2478 uint32_t crc = AV_RL32(src + 4);
2482 multiblock = (flags & 0x1800) != 0x1800;
2485 ret = AVERROR_INVALIDDATA;
2488 blocksize = AV_RL32(src);
2494 if (blocksize > srclen) {
2495 ret = AVERROR_INVALIDDATA;
2499 tmp = av_realloc(dst, dstlen + blocksize + 32);
2501 ret = AVERROR(ENOMEM);
2505 dstlen += blocksize + 32;
2507 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2508 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2509 AV_WL16(dst + offset + 8, ver); // version
2510 AV_WL16(dst + offset + 10, 0); // track/index_no
2511 AV_WL32(dst + offset + 12, 0); // total samples
2512 AV_WL32(dst + offset + 16, 0); // block index
2513 AV_WL32(dst + offset + 20, samples); // number of samples
2514 AV_WL32(dst + offset + 24, flags); // flags
2515 AV_WL32(dst + offset + 28, crc); // crc
2516 memcpy(dst + offset + 32, src, blocksize); // block data
2519 srclen -= blocksize;
2520 offset += blocksize + 32;
2533 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
2534 MatroskaTrack *track,
2536 uint8_t *data, int data_len,
2542 uint8_t *id, *settings, *text, *buf;
2543 int id_len, settings_len, text_len;
2548 return AVERROR_INVALIDDATA;
2551 q = data + data_len;
2556 if (*p == '\r' || *p == '\n') {
2565 if (p >= q || *p != '\n')
2566 return AVERROR_INVALIDDATA;
2572 if (*p == '\r' || *p == '\n') {
2573 settings_len = p - settings;
2581 if (p >= q || *p != '\n')
2582 return AVERROR_INVALIDDATA;
2587 while (text_len > 0) {
2588 const int len = text_len - 1;
2589 const uint8_t c = p[len];
2590 if (c != '\r' && c != '\n')
2596 return AVERROR_INVALIDDATA;
2598 pkt = av_mallocz(sizeof(*pkt));
2600 return AVERROR(ENOMEM);
2601 err = av_new_packet(pkt, text_len);
2604 return AVERROR(err);
2607 memcpy(pkt->data, text, text_len);
2610 buf = av_packet_new_side_data(pkt,
2611 AV_PKT_DATA_WEBVTT_IDENTIFIER,
2615 return AVERROR(ENOMEM);
2617 memcpy(buf, id, id_len);
2620 if (settings_len > 0) {
2621 buf = av_packet_new_side_data(pkt,
2622 AV_PKT_DATA_WEBVTT_SETTINGS,
2626 return AVERROR(ENOMEM);
2628 memcpy(buf, settings, settings_len);
2631 // Do we need this for subtitles?
2632 // pkt->flags = AV_PKT_FLAG_KEY;
2634 pkt->stream_index = st->index;
2635 pkt->pts = timecode;
2637 // Do we need this for subtitles?
2638 // pkt->dts = timecode;
2640 pkt->duration = duration;
2643 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2644 matroska->prev_pkt = pkt;
2649 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2650 MatroskaTrack *track, AVStream *st,
2651 uint8_t *data, int pkt_size,
2652 uint64_t timecode, uint64_t lace_duration,
2653 int64_t pos, int is_keyframe,
2654 uint8_t *additional, uint64_t additional_id, int additional_size,
2655 int64_t discard_padding)
2657 MatroskaTrackEncoding *encodings = track->encodings.elem;
2658 uint8_t *pkt_data = data;
2659 int offset = 0, res;
2662 if (encodings && !encodings->type && encodings->scope & 1) {
2663 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2668 if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2670 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2672 av_log(matroska->ctx, AV_LOG_ERROR,
2673 "Error parsing a wavpack block.\n");
2676 if (pkt_data != data)
2677 av_freep(&pkt_data);
2681 if (st->codec->codec_id == AV_CODEC_ID_PRORES &&
2682 AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
2685 pkt = av_mallocz(sizeof(AVPacket));
2687 if (pkt_data != data)
2688 av_freep(&pkt_data);
2689 return AVERROR(ENOMEM);
2691 /* XXX: prevent data copy... */
2692 if (av_new_packet(pkt, pkt_size + offset) < 0) {
2694 res = AVERROR(ENOMEM);
2698 if (st->codec->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
2699 uint8_t *buf = pkt->data;
2700 bytestream_put_be32(&buf, pkt_size);
2701 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2704 memcpy(pkt->data + offset, pkt_data, pkt_size);
2706 if (pkt_data != data)
2707 av_freep(&pkt_data);
2709 pkt->flags = is_keyframe;
2710 pkt->stream_index = st->index;
2712 if (additional_size > 0) {
2713 uint8_t *side_data = av_packet_new_side_data(pkt,
2714 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2715 additional_size + 8);
2717 av_free_packet(pkt);
2719 return AVERROR(ENOMEM);
2721 AV_WB64(side_data, additional_id);
2722 memcpy(side_data + 8, additional, additional_size);
2725 if (discard_padding) {
2726 uint8_t *side_data = av_packet_new_side_data(pkt,
2727 AV_PKT_DATA_SKIP_SAMPLES,
2730 av_free_packet(pkt);
2732 return AVERROR(ENOMEM);
2734 AV_WL32(side_data, 0);
2735 AV_WL32(side_data + 4, av_rescale_q(discard_padding,
2736 (AVRational){1, 1000000000},
2737 (AVRational){1, st->codec->sample_rate}));
2740 if (track->ms_compat)
2741 pkt->dts = timecode;
2743 pkt->pts = timecode;
2745 if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
2747 * For backward compatibility.
2748 * Historically, we have put subtitle duration
2749 * in convergence_duration, on the off chance
2750 * that the time_scale is less than 1us, which
2751 * could result in a 32bit overflow on the
2752 * normal duration field.
2754 pkt->convergence_duration = lace_duration;
2757 if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE ||
2758 lace_duration <= INT_MAX) {
2760 * For non subtitle tracks, just store the duration
2763 * If it's a subtitle track and duration value does
2764 * not overflow a uint32, then also store it normally.
2766 pkt->duration = lace_duration;
2769 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2770 matroska->prev_pkt = pkt;
2775 if (pkt_data != data)
2776 av_freep(&pkt_data);
2780 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2781 int size, int64_t pos, uint64_t cluster_time,
2782 uint64_t block_duration, int is_keyframe,
2783 uint8_t *additional, uint64_t additional_id, int additional_size,
2784 int64_t cluster_pos, int64_t discard_padding)
2786 uint64_t timecode = AV_NOPTS_VALUE;
2787 MatroskaTrack *track;
2791 uint32_t *lace_size = NULL;
2792 int n, flags, laces = 0;
2794 int trust_default_duration = 1;
2796 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2797 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2803 track = matroska_find_track_by_num(matroska, num);
2804 if (!track || !track->stream) {
2805 av_log(matroska->ctx, AV_LOG_INFO,
2806 "Invalid stream %"PRIu64" or size %u\n", num, size);
2807 return AVERROR_INVALIDDATA;
2808 } else if (size <= 3)
2811 if (st->discard >= AVDISCARD_ALL)
2813 av_assert1(block_duration != AV_NOPTS_VALUE);
2815 block_time = sign_extend(AV_RB16(data), 16);
2819 if (is_keyframe == -1)
2820 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2822 if (cluster_time != (uint64_t) -1 &&
2823 (block_time >= 0 || cluster_time >= -block_time)) {
2824 timecode = cluster_time + block_time - track->codec_delay;
2825 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2826 timecode < track->end_timecode)
2827 is_keyframe = 0; /* overlapping subtitles are not key frame */
2829 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2833 if (matroska->skip_to_keyframe &&
2834 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2835 if (timecode < matroska->skip_to_timecode)
2838 matroska->skip_to_keyframe = 0;
2839 else if (!st->skip_to_keyframe) {
2840 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
2841 matroska->skip_to_keyframe = 0;
2845 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2846 &lace_size, &laces);
2851 if (track->audio.samplerate == 8000) {
2852 // If this is needed for more codecs, then add them here
2853 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
2854 if (track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
2855 trust_default_duration = 0;
2859 if (!block_duration && trust_default_duration)
2860 block_duration = track->default_duration * laces / matroska->time_scale;
2862 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
2863 track->end_timecode =
2864 FFMAX(track->end_timecode, timecode + block_duration);
2866 for (n = 0; n < laces; n++) {
2867 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
2869 if (lace_size[n] > size) {
2870 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
2874 if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2875 st->codec->codec_id == AV_CODEC_ID_COOK ||
2876 st->codec->codec_id == AV_CODEC_ID_SIPR ||
2877 st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2878 st->codec->block_align && track->audio.sub_packet_size) {
2879 res = matroska_parse_rm_audio(matroska, track, st, data,
2885 } else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
2886 res = matroska_parse_webvtt(matroska, track, st,
2888 timecode, lace_duration,
2893 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2894 timecode, lace_duration, pos,
2895 !n ? is_keyframe : 0,
2896 additional, additional_id, additional_size,
2902 if (timecode != AV_NOPTS_VALUE)
2903 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
2904 data += lace_size[n];
2905 size -= lace_size[n];
2913 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2915 EbmlList *blocks_list;
2916 MatroskaBlock *blocks;
2918 res = ebml_parse(matroska,
2919 matroska_cluster_incremental_parsing,
2920 &matroska->current_cluster);
2923 if (matroska->current_cluster_pos)
2924 ebml_level_end(matroska);
2925 ebml_free(matroska_cluster, &matroska->current_cluster);
2926 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2927 matroska->current_cluster_num_blocks = 0;
2928 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2929 matroska->prev_pkt = NULL;
2930 /* sizeof the ID which was already read */
2931 if (matroska->current_id)
2932 matroska->current_cluster_pos -= 4;
2933 res = ebml_parse(matroska,
2934 matroska_clusters_incremental,
2935 &matroska->current_cluster);
2936 /* Try parsing the block again. */
2938 res = ebml_parse(matroska,
2939 matroska_cluster_incremental_parsing,
2940 &matroska->current_cluster);
2944 matroska->current_cluster_num_blocks <
2945 matroska->current_cluster.blocks.nb_elem) {
2946 blocks_list = &matroska->current_cluster.blocks;
2947 blocks = blocks_list->elem;
2949 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2950 i = blocks_list->nb_elem - 1;
2951 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2952 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2953 uint8_t* additional = blocks[i].additional.size > 0 ?
2954 blocks[i].additional.data : NULL;
2955 if (!blocks[i].non_simple)
2956 blocks[i].duration = 0;
2957 res = matroska_parse_block(matroska, blocks[i].bin.data,
2958 blocks[i].bin.size, blocks[i].bin.pos,
2959 matroska->current_cluster.timecode,
2960 blocks[i].duration, is_keyframe,
2961 additional, blocks[i].additional_id,
2962 blocks[i].additional.size,
2963 matroska->current_cluster_pos,
2964 blocks[i].discard_padding);
2971 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2973 MatroskaCluster cluster = { 0 };
2974 EbmlList *blocks_list;
2975 MatroskaBlock *blocks;
2979 if (!matroska->contains_ssa)
2980 return matroska_parse_cluster_incremental(matroska);
2981 pos = avio_tell(matroska->ctx->pb);
2982 matroska->prev_pkt = NULL;
2983 if (matroska->current_id)
2984 pos -= 4; /* sizeof the ID which was already read */
2985 res = ebml_parse(matroska, matroska_clusters, &cluster);
2986 blocks_list = &cluster.blocks;
2987 blocks = blocks_list->elem;
2988 for (i = 0; i < blocks_list->nb_elem; i++)
2989 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2990 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2991 res = matroska_parse_block(matroska, blocks[i].bin.data,
2992 blocks[i].bin.size, blocks[i].bin.pos,
2993 cluster.timecode, blocks[i].duration,
2994 is_keyframe, NULL, 0, 0, pos,
2995 blocks[i].discard_padding);
2997 ebml_free(matroska_cluster, &cluster);
3001 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3003 MatroskaDemuxContext *matroska = s->priv_data;
3005 while (matroska_deliver_packet(matroska, pkt)) {
3006 int64_t pos = avio_tell(matroska->ctx->pb);
3009 if (matroska_parse_cluster(matroska) < 0)
3010 matroska_resync(matroska, pos);
3016 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3017 int64_t timestamp, int flags)
3019 MatroskaDemuxContext *matroska = s->priv_data;
3020 MatroskaTrack *tracks = NULL;
3021 AVStream *st = s->streams[stream_index];
3022 int i, index, index_sub, index_min;
3024 /* Parse the CUES now since we need the index data to seek. */
3025 if (matroska->cues_parsing_deferred > 0) {
3026 matroska->cues_parsing_deferred = 0;
3027 matroska_parse_cues(matroska);
3030 if (!st->nb_index_entries)
3032 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3034 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3035 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3037 matroska->current_id = 0;
3038 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3039 matroska_clear_queue(matroska);
3040 if (matroska_parse_cluster(matroska) < 0)
3045 matroska_clear_queue(matroska);
3046 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3050 tracks = matroska->tracks.elem;
3051 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3052 tracks[i].audio.pkt_cnt = 0;
3053 tracks[i].audio.sub_packet_cnt = 0;
3054 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3055 tracks[i].end_timecode = 0;
3056 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3057 tracks[i].stream->discard != AVDISCARD_ALL) {
3058 index_sub = av_index_search_timestamp(
3059 tracks[i].stream, st->index_entries[index].timestamp,
3060 AVSEEK_FLAG_BACKWARD);
3061 while (index_sub >= 0 &&
3063 tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3064 st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3069 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3070 matroska->current_id = 0;
3071 if (flags & AVSEEK_FLAG_ANY) {
3072 st->skip_to_keyframe = 0;
3073 matroska->skip_to_timecode = timestamp;
3075 st->skip_to_keyframe = 1;
3076 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3078 matroska->skip_to_keyframe = 1;
3080 matroska->num_levels = 0;
3081 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3084 // slightly hackish but allows proper fallback to
3085 // the generic seeking code.
3086 matroska_clear_queue(matroska);
3087 matroska->current_id = 0;
3088 st->skip_to_keyframe =
3089 matroska->skip_to_keyframe = 0;
3091 matroska->num_levels = 0;
3095 static int matroska_read_close(AVFormatContext *s)
3097 MatroskaDemuxContext *matroska = s->priv_data;
3098 MatroskaTrack *tracks = matroska->tracks.elem;
3101 matroska_clear_queue(matroska);
3103 for (n = 0; n < matroska->tracks.nb_elem; n++)
3104 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3105 av_freep(&tracks[n].audio.buf);
3106 ebml_free(matroska_cluster, &matroska->current_cluster);
3107 ebml_free(matroska_segment, matroska);
3113 int64_t start_time_ns;
3114 int64_t end_time_ns;
3115 int64_t start_offset;
3119 /* This function searches all the Cues and returns the CueDesc corresponding the
3120 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3121 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3123 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3124 MatroskaDemuxContext *matroska = s->priv_data;
3127 int nb_index_entries = s->streams[0]->nb_index_entries;
3128 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3129 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3130 for (i = 1; i < nb_index_entries; i++) {
3131 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3132 index_entries[i].timestamp * matroska->time_scale > ts) {
3137 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3138 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3139 if (i != nb_index_entries - 1) {
3140 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3141 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3143 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3144 // FIXME: this needs special handling for files where Cues appear
3145 // before Clusters. the current logic assumes Cues appear after
3147 cue_desc.end_offset = cues_start - matroska->segment_start;
3152 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3154 MatroskaDemuxContext *matroska = s->priv_data;
3155 int64_t cluster_pos, before_pos;
3157 if (s->streams[0]->nb_index_entries <= 0) return 0;
3158 // seek to the first cluster using cues.
3159 index = av_index_search_timestamp(s->streams[0], 0, 0);
3160 if (index < 0) return 0;
3161 cluster_pos = s->streams[0]->index_entries[index].pos;
3162 before_pos = avio_tell(s->pb);
3164 int64_t cluster_id = 0, cluster_length = 0;
3166 avio_seek(s->pb, cluster_pos, SEEK_SET);
3167 // read cluster id and length
3168 ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3169 ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3170 if (cluster_id != 0xF43B675) { // done with all clusters
3173 avio_seek(s->pb, cluster_pos, SEEK_SET);
3174 matroska->current_id = 0;
3175 matroska_clear_queue(matroska);
3176 if (matroska_parse_cluster(matroska) < 0 ||
3177 matroska->num_packets <= 0) {
3180 pkt = matroska->packets[0];
3181 cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3182 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3187 avio_seek(s->pb, before_pos, SEEK_SET);
3191 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3192 double min_buffer, double* buffer,
3193 double* sec_to_download, AVFormatContext *s,
3196 double nano_seconds_per_second = 1000000000.0;
3197 double time_sec = time_ns / nano_seconds_per_second;
3199 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3200 int64_t end_time_ns = time_ns + time_to_search_ns;
3201 double sec_downloaded = 0.0;
3202 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3203 if (desc_curr.start_time_ns == -1)
3205 *sec_to_download = 0.0;
3207 // Check for non cue start time.
3208 if (time_ns > desc_curr.start_time_ns) {
3209 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3210 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3211 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3212 double timeToDownload = (cueBytes * 8.0) / bps;
3214 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3215 *sec_to_download += timeToDownload;
3217 // Check if the search ends within the first cue.
3218 if (desc_curr.end_time_ns >= end_time_ns) {
3219 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3220 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3221 sec_downloaded = percent_to_sub * sec_downloaded;
3222 *sec_to_download = percent_to_sub * *sec_to_download;
3225 if ((sec_downloaded + *buffer) <= min_buffer) {
3229 // Get the next Cue.
3230 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3233 while (desc_curr.start_time_ns != -1) {
3234 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3235 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3236 double desc_sec = desc_ns / nano_seconds_per_second;
3237 double bits = (desc_bytes * 8.0);
3238 double time_to_download = bits / bps;
3240 sec_downloaded += desc_sec - time_to_download;
3241 *sec_to_download += time_to_download;
3243 if (desc_curr.end_time_ns >= end_time_ns) {
3244 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3245 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3246 sec_downloaded = percent_to_sub * sec_downloaded;
3247 *sec_to_download = percent_to_sub * *sec_to_download;
3249 if ((sec_downloaded + *buffer) <= min_buffer)
3254 if ((sec_downloaded + *buffer) <= min_buffer) {
3259 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3261 *buffer = *buffer + sec_downloaded;
3265 /* This function computes the bandwidth of the WebM file with the help of
3266 * buffer_size_after_time_downloaded() function. Both of these functions are
3267 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3268 * Matroska parsing mechanism.
3270 * Returns the bandwidth of the file on success; -1 on error.
3272 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3274 MatroskaDemuxContext *matroska = s->priv_data;
3275 AVStream *st = s->streams[0];
3276 double bandwidth = 0.0;
3279 for (i = 0; i < st->nb_index_entries; i++) {
3280 int64_t prebuffer_ns = 1000000000;
3281 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3282 double nano_seconds_per_second = 1000000000.0;
3283 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3284 double prebuffer_bytes = 0.0;
3285 int64_t temp_prebuffer_ns = prebuffer_ns;
3286 int64_t pre_bytes, pre_ns;
3287 double pre_sec, prebuffer, bits_per_second;
3288 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3290 // Start with the first Cue.
3291 CueDesc desc_end = desc_beg;
3293 // Figure out how much data we have downloaded for the prebuffer. This will
3294 // be used later to adjust the bits per sample to try.
3295 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3296 // Prebuffered the entire Cue.
3297 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3298 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3299 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3301 if (desc_end.start_time_ns == -1) {
3302 // The prebuffer is larger than the duration.
3303 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3305 bits_per_second = 0.0;
3307 // The prebuffer ends in the last Cue. Estimate how much data was
3309 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3310 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3311 pre_sec = pre_ns / nano_seconds_per_second;
3313 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3315 prebuffer = prebuffer_ns / nano_seconds_per_second;
3317 // Set this to 0.0 in case our prebuffer buffers the entire video.
3318 bits_per_second = 0.0;
3320 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3321 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3322 double desc_sec = desc_ns / nano_seconds_per_second;
3323 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3325 // Drop the bps by the percentage of bytes buffered.
3326 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3327 double mod_bits_per_second = calc_bits_per_second * percent;
3329 if (prebuffer < desc_sec) {
3331 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3333 // Add 1 so the bits per second should be a little bit greater than file
3335 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3336 const double min_buffer = 0.0;
3337 double buffer = prebuffer;
3338 double sec_to_download = 0.0;
3340 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3341 min_buffer, &buffer, &sec_to_download,
3345 } else if (rv == 0) {
3346 bits_per_second = (double)(bps);
3351 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3352 } while (desc_end.start_time_ns != -1);
3354 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3356 return (int64_t)bandwidth;
3359 static int webm_dash_manifest_cues(AVFormatContext *s)
3361 MatroskaDemuxContext *matroska = s->priv_data;
3362 EbmlList *seekhead_list = &matroska->seekhead;
3363 MatroskaSeekhead *seekhead = seekhead_list->elem;
3365 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3368 // determine cues start and end positions
3369 for (i = 0; i < seekhead_list->nb_elem; i++)
3370 if (seekhead[i].id == MATROSKA_ID_CUES)
3373 if (i >= seekhead_list->nb_elem) return -1;
3375 before_pos = avio_tell(matroska->ctx->pb);
3376 cues_start = seekhead[i].pos + matroska->segment_start;
3377 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3378 // cues_end is computed as cues_start + cues_length + length of the
3379 // Cues element ID + EBML length of the Cues element. cues_end is
3380 // inclusive and the above sum is reduced by 1.
3381 uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3382 bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3383 bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3384 cues_end = cues_start + cues_length + bytes_read - 1;
3386 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3387 if (cues_start == -1 || cues_end == -1) return -1;
3390 matroska_parse_cues(matroska);
3393 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3396 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3399 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3400 if (bandwidth < 0) return -1;
3401 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3403 // check if all clusters start with key frames
3404 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3406 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3407 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3408 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3409 if (!buf) return -1;
3411 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3412 snprintf(buf, (i + 1) * 20 * sizeof(char),
3413 "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3414 if (i != s->streams[0]->nb_index_entries - 1)
3415 strncat(buf, ",", sizeof(char));
3417 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3423 static int webm_dash_manifest_read_header(AVFormatContext *s)
3426 int ret = matroska_read_header(s);
3427 MatroskaTrack *tracks;
3428 MatroskaDemuxContext *matroska = s->priv_data;
3430 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3434 if (!matroska->is_live) {
3435 buf = av_asprintf("%g", matroska->duration);
3436 if (!buf) return AVERROR(ENOMEM);
3437 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3440 // initialization range
3441 // 5 is the offset of Cluster ID.
3442 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, avio_tell(s->pb) - 5, 0);
3445 // basename of the file
3446 buf = strrchr(s->filename, '/');
3447 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3450 tracks = matroska->tracks.elem;
3451 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3453 // parse the cues and populate Cue related fields
3454 return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3457 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
3462 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3463 static const AVOption options[] = {
3464 { "live", "flag indicating that the input is a live file that only has the headers.", OFFSET(is_live), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
3468 static const AVClass webm_dash_class = {
3469 .class_name = "WebM DASH Manifest demuxer",
3470 .item_name = av_default_item_name,
3472 .version = LIBAVUTIL_VERSION_INT,
3475 AVInputFormat ff_matroska_demuxer = {
3476 .name = "matroska,webm",
3477 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3478 .extensions = "mkv,mk3d,mka,mks",
3479 .priv_data_size = sizeof(MatroskaDemuxContext),
3480 .read_probe = matroska_probe,
3481 .read_header = matroska_read_header,
3482 .read_packet = matroska_read_packet,
3483 .read_close = matroska_read_close,
3484 .read_seek = matroska_read_seek,
3485 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3488 AVInputFormat ff_webm_dash_manifest_demuxer = {
3489 .name = "webm_dash_manifest",
3490 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3491 .priv_data_size = sizeof(MatroskaDemuxContext),
3492 .read_header = webm_dash_manifest_read_header,
3493 .read_packet = webm_dash_manifest_read_packet,
3494 .read_close = matroska_read_close,
3495 .priv_class = &webm_dash_class,