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 },
479 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
483 static const EbmlSyntax matroska_chapter_entry[] = {
484 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
485 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
486 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
487 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
488 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
489 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
490 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
491 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
495 static const EbmlSyntax matroska_chapter[] = {
496 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
497 { MATROSKA_ID_EDITIONUID, EBML_NONE },
498 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
499 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
500 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
504 static const EbmlSyntax matroska_chapters[] = {
505 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
509 static const EbmlSyntax matroska_index_pos[] = {
510 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
511 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
512 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
513 { MATROSKA_ID_CUEDURATION, EBML_NONE },
514 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
518 static const EbmlSyntax matroska_index_entry[] = {
519 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
520 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
524 static const EbmlSyntax matroska_index[] = {
525 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
529 static const EbmlSyntax matroska_simpletag[] = {
530 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
531 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
532 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
533 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
534 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
535 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
539 static const EbmlSyntax matroska_tagtargets[] = {
540 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
541 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
542 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
543 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
544 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
548 static const EbmlSyntax matroska_tag[] = {
549 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
550 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
554 static const EbmlSyntax matroska_tags[] = {
555 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
559 static const EbmlSyntax matroska_seekhead_entry[] = {
560 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
561 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
565 static const EbmlSyntax matroska_seekhead[] = {
566 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
570 static const EbmlSyntax matroska_segment[] = {
571 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
572 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
573 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
574 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
575 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
576 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
577 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
578 { MATROSKA_ID_CLUSTER, EBML_STOP },
582 static const EbmlSyntax matroska_segments[] = {
583 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
587 static const EbmlSyntax matroska_blockmore[] = {
588 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
589 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
593 static const EbmlSyntax matroska_blockadditions[] = {
594 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
598 static const EbmlSyntax matroska_blockgroup[] = {
599 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
600 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
601 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
602 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
603 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
604 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
605 { MATROSKA_ID_CODECSTATE, EBML_NONE },
606 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
610 static const EbmlSyntax matroska_cluster[] = {
611 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
612 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
613 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
614 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
615 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
619 static const EbmlSyntax matroska_clusters[] = {
620 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
621 { MATROSKA_ID_INFO, EBML_NONE },
622 { MATROSKA_ID_CUES, EBML_NONE },
623 { MATROSKA_ID_TAGS, EBML_NONE },
624 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
628 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
629 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
630 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
631 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
632 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
633 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
634 { MATROSKA_ID_INFO, EBML_NONE },
635 { MATROSKA_ID_CUES, EBML_NONE },
636 { MATROSKA_ID_TAGS, EBML_NONE },
637 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
638 { MATROSKA_ID_CLUSTER, EBML_STOP },
642 static const EbmlSyntax matroska_cluster_incremental[] = {
643 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
644 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
645 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
646 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
647 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
651 static const EbmlSyntax matroska_clusters_incremental[] = {
652 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
653 { MATROSKA_ID_INFO, EBML_NONE },
654 { MATROSKA_ID_CUES, EBML_NONE },
655 { MATROSKA_ID_TAGS, EBML_NONE },
656 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
660 static const char *const matroska_doctypes[] = { "matroska", "webm" };
662 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
664 AVIOContext *pb = matroska->ctx->pb;
666 matroska->current_id = 0;
667 matroska->num_levels = 0;
669 /* seek to next position to resync from */
670 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
675 // try to find a toplevel element
676 while (!avio_feof(pb)) {
677 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
678 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
679 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
680 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
681 matroska->current_id = id;
684 id = (id << 8) | avio_r8(pb);
693 * Return: Whether we reached the end of a level in the hierarchy or not.
695 static int ebml_level_end(MatroskaDemuxContext *matroska)
697 AVIOContext *pb = matroska->ctx->pb;
698 int64_t pos = avio_tell(pb);
700 if (matroska->num_levels > 0) {
701 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
702 if (pos - level->start >= level->length || matroska->current_id) {
703 matroska->num_levels--;
707 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
711 * Read: an "EBML number", which is defined as a variable-length
712 * array of bytes. The first byte indicates the length by giving a
713 * number of 0-bits followed by a one. The position of the first
714 * "one" bit inside the first byte indicates the length of this
716 * Returns: number of bytes read, < 0 on error
718 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
719 int max_size, uint64_t *number)
724 /* The first byte tells us the length in bytes - avio_r8() can normally
725 * return 0, but since that's not a valid first ebmlID byte, we can
726 * use it safely here to catch EOS. */
727 if (!(total = avio_r8(pb))) {
728 /* we might encounter EOS here */
729 if (!avio_feof(pb)) {
730 int64_t pos = avio_tell(pb);
731 av_log(matroska->ctx, AV_LOG_ERROR,
732 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
734 return pb->error ? pb->error : AVERROR(EIO);
739 /* get the length of the EBML number */
740 read = 8 - ff_log2_tab[total];
741 if (read > max_size) {
742 int64_t pos = avio_tell(pb) - 1;
743 av_log(matroska->ctx, AV_LOG_ERROR,
744 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
745 (uint8_t) total, pos, pos);
746 return AVERROR_INVALIDDATA;
749 /* read out length */
750 total ^= 1 << ff_log2_tab[total];
752 total = (total << 8) | avio_r8(pb);
760 * Read a EBML length value.
761 * This needs special handling for the "unknown length" case which has multiple
764 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
767 int res = ebml_read_num(matroska, pb, 8, number);
768 if (res > 0 && *number + 1 == 1ULL << (7 * res))
769 *number = 0xffffffffffffffULL;
774 * Read the next element as an unsigned int.
775 * 0 is success, < 0 is failure.
777 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
782 return AVERROR_INVALIDDATA;
784 /* big-endian ordering; build up number */
787 *num = (*num << 8) | avio_r8(pb);
793 * Read the next element as a signed int.
794 * 0 is success, < 0 is failure.
796 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
801 return AVERROR_INVALIDDATA;
806 *num = sign_extend(avio_r8(pb), 8);
808 /* big-endian ordering; build up number */
810 *num = ((uint64_t)*num << 8) | avio_r8(pb);
817 * Read the next element as a float.
818 * 0 is success, < 0 is failure.
820 static int ebml_read_float(AVIOContext *pb, int size, double *num)
825 *num = av_int2float(avio_rb32(pb));
827 *num = av_int2double(avio_rb64(pb));
829 return AVERROR_INVALIDDATA;
835 * Read the next element as an ASCII string.
836 * 0 is success, < 0 is failure.
838 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
842 /* EBML strings are usually not 0-terminated, so we allocate one
843 * byte more, read the string and NULL-terminate it ourselves. */
844 if (!(res = av_malloc(size + 1)))
845 return AVERROR(ENOMEM);
846 if (avio_read(pb, (uint8_t *) res, size) != size) {
858 * Read the next element as binary data.
859 * 0 is success, < 0 is failure.
861 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
863 av_fast_padded_malloc(&bin->data, &bin->size, length);
865 return AVERROR(ENOMEM);
868 bin->pos = avio_tell(pb);
869 if (avio_read(pb, bin->data, length) != length) {
870 av_freep(&bin->data);
879 * Read the next element, but only the header. The contents
880 * are supposed to be sub-elements which can be read separately.
881 * 0 is success, < 0 is failure.
883 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
885 AVIOContext *pb = matroska->ctx->pb;
886 MatroskaLevel *level;
888 if (matroska->num_levels >= EBML_MAX_DEPTH) {
889 av_log(matroska->ctx, AV_LOG_ERROR,
890 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
891 return AVERROR(ENOSYS);
894 level = &matroska->levels[matroska->num_levels++];
895 level->start = avio_tell(pb);
896 level->length = length;
902 * Read signed/unsigned "EBML" numbers.
903 * Return: number of bytes processed, < 0 on error
905 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
906 uint8_t *data, uint32_t size, uint64_t *num)
909 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
910 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
914 * Same as above, but signed.
916 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
917 uint8_t *data, uint32_t size, int64_t *num)
922 /* read as unsigned number first */
923 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
926 /* make signed (weird way) */
927 *num = unum - ((1LL << (7 * res - 1)) - 1);
932 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
933 EbmlSyntax *syntax, void *data);
935 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
936 uint32_t id, void *data)
939 for (i = 0; syntax[i].id; i++)
940 if (id == syntax[i].id)
942 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
943 matroska->num_levels > 0 &&
944 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
945 return 0; // we reached the end of an unknown size cluster
946 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
947 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
949 return ebml_parse_elem(matroska, &syntax[i], data);
952 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
955 if (!matroska->current_id) {
957 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
959 // in live mode, finish parsing if EOF is reached.
960 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
961 res == AVERROR_EOF) ? 1 : res;
963 matroska->current_id = id | 1 << 7 * res;
965 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
968 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
973 for (i = 0; syntax[i].id; i++)
974 switch (syntax[i].type) {
976 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
979 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
983 // the default may be NULL
984 if (syntax[i].def.s) {
985 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
986 *dst = av_strdup(syntax[i].def.s);
988 return AVERROR(ENOMEM);
993 while (!res && !ebml_level_end(matroska))
994 res = ebml_parse(matroska, syntax, data);
999 static int is_ebml_id_valid(uint32_t id)
1001 // Due to endian nonsense in Matroska, the highest byte with any bits set
1002 // will contain the leading length bit. This bit in turn identifies the
1003 // total byte length of the element by its position within the byte.
1004 unsigned int bits = av_log2(id);
1005 return id && (bits + 7) / 8 == (8 - bits % 8);
1009 * Allocate and return the entry for the level1 element with the given ID. If
1010 * an entry already exists, return the existing entry.
1012 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1016 MatroskaLevel1Element *elem;
1018 if (!is_ebml_id_valid(id))
1021 // Some files link to all clusters; useless.
1022 if (id == MATROSKA_ID_CLUSTER)
1025 // There can be multiple seekheads.
1026 if (id != MATROSKA_ID_SEEKHEAD) {
1027 for (i = 0; i < matroska->num_level1_elems; i++) {
1028 if (matroska->level1_elems[i].id == id)
1029 return &matroska->level1_elems[i];
1033 // Only a completely broken file would have more elements.
1034 // It also provides a low-effort way to escape from circular seekheads
1035 // (every iteration will add a level1 entry).
1036 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1037 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1041 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1042 *elem = (MatroskaLevel1Element){.id = id};
1047 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1048 EbmlSyntax *syntax, void *data)
1050 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1053 // max. 16 MB for strings
1054 [EBML_STR] = 0x1000000,
1055 [EBML_UTF8] = 0x1000000,
1056 // max. 256 MB for binary data
1057 [EBML_BIN] = 0x10000000,
1058 // no limits for anything else
1060 AVIOContext *pb = matroska->ctx->pb;
1061 uint32_t id = syntax->id;
1065 MatroskaLevel1Element *level1_elem;
1067 data = (char *) data + syntax->data_offset;
1068 if (syntax->list_elem_size) {
1069 EbmlList *list = data;
1070 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1072 return AVERROR(ENOMEM);
1073 list->elem = newelem;
1074 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1075 memset(data, 0, syntax->list_elem_size);
1079 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1080 matroska->current_id = 0;
1081 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1083 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1084 av_log(matroska->ctx, AV_LOG_ERROR,
1085 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1086 length, max_lengths[syntax->type], syntax->type);
1087 return AVERROR_INVALIDDATA;
1091 switch (syntax->type) {
1093 res = ebml_read_uint(pb, length, data);
1096 res = ebml_read_sint(pb, length, data);
1099 res = ebml_read_float(pb, length, data);
1103 res = ebml_read_ascii(pb, length, data);
1106 res = ebml_read_binary(pb, length, data);
1110 if ((res = ebml_read_master(matroska, length)) < 0)
1112 if (id == MATROSKA_ID_SEGMENT)
1113 matroska->segment_start = avio_tell(matroska->ctx->pb);
1114 if (id == MATROSKA_ID_CUES)
1115 matroska->cues_parsing_deferred = 0;
1116 if (syntax->type == EBML_LEVEL1 &&
1117 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1118 if (level1_elem->parsed)
1119 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1120 level1_elem->parsed = 1;
1122 return ebml_parse_nest(matroska, syntax->def.n, data);
1124 return ebml_parse_id(matroska, syntax->def.n, id, data);
1128 if (ffio_limit(pb, length) != length)
1129 return AVERROR(EIO);
1130 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1132 if (res == AVERROR_INVALIDDATA)
1133 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1134 else if (res == AVERROR(EIO))
1135 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1139 static void ebml_free(EbmlSyntax *syntax, void *data)
1142 for (i = 0; syntax[i].id; i++) {
1143 void *data_off = (char *) data + syntax[i].data_offset;
1144 switch (syntax[i].type) {
1150 av_freep(&((EbmlBin *) data_off)->data);
1154 if (syntax[i].list_elem_size) {
1155 EbmlList *list = data_off;
1156 char *ptr = list->elem;
1157 for (j = 0; j < list->nb_elem;
1158 j++, ptr += syntax[i].list_elem_size)
1159 ebml_free(syntax[i].def.n, ptr);
1160 av_freep(&list->elem);
1162 ebml_free(syntax[i].def.n, data_off);
1172 static int matroska_probe(AVProbeData *p)
1175 int len_mask = 0x80, size = 1, n = 1, i;
1178 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1181 /* length of header */
1183 while (size <= 8 && !(total & len_mask)) {
1189 total &= (len_mask - 1);
1191 total = (total << 8) | p->buf[4 + n++];
1193 /* Does the probe data contain the whole header? */
1194 if (p->buf_size < 4 + size + total)
1197 /* The header should contain a known document type. For now,
1198 * we don't parse the whole header but simply check for the
1199 * availability of that array of characters inside the header.
1200 * Not fully fool-proof, but good enough. */
1201 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1202 size_t probelen = strlen(matroska_doctypes[i]);
1203 if (total < probelen)
1205 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1206 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1207 return AVPROBE_SCORE_MAX;
1210 // probably valid EBML header but no recognized doctype
1211 return AVPROBE_SCORE_EXTENSION;
1214 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1217 MatroskaTrack *tracks = matroska->tracks.elem;
1220 for (i = 0; i < matroska->tracks.nb_elem; i++)
1221 if (tracks[i].num == num)
1224 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1228 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1229 MatroskaTrack *track)
1231 MatroskaTrackEncoding *encodings = track->encodings.elem;
1232 uint8_t *data = *buf;
1233 int isize = *buf_size;
1234 uint8_t *pkt_data = NULL;
1235 uint8_t av_unused *newpktdata;
1236 int pkt_size = isize;
1240 if (pkt_size >= 10000000U)
1241 return AVERROR_INVALIDDATA;
1243 switch (encodings[0].compression.algo) {
1244 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1246 int header_size = encodings[0].compression.settings.size;
1247 uint8_t *header = encodings[0].compression.settings.data;
1249 if (header_size && !header) {
1250 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1257 pkt_size = isize + header_size;
1258 pkt_data = av_malloc(pkt_size);
1260 return AVERROR(ENOMEM);
1262 memcpy(pkt_data, header, header_size);
1263 memcpy(pkt_data + header_size, data, isize);
1267 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1269 olen = pkt_size *= 3;
1270 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1272 result = AVERROR(ENOMEM);
1275 pkt_data = newpktdata;
1276 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1277 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1279 result = AVERROR_INVALIDDATA;
1286 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1288 z_stream zstream = { 0 };
1289 if (inflateInit(&zstream) != Z_OK)
1291 zstream.next_in = data;
1292 zstream.avail_in = isize;
1295 newpktdata = av_realloc(pkt_data, pkt_size);
1297 inflateEnd(&zstream);
1298 result = AVERROR(ENOMEM);
1301 pkt_data = newpktdata;
1302 zstream.avail_out = pkt_size - zstream.total_out;
1303 zstream.next_out = pkt_data + zstream.total_out;
1304 result = inflate(&zstream, Z_NO_FLUSH);
1305 } while (result == Z_OK && pkt_size < 10000000);
1306 pkt_size = zstream.total_out;
1307 inflateEnd(&zstream);
1308 if (result != Z_STREAM_END) {
1309 if (result == Z_MEM_ERROR)
1310 result = AVERROR(ENOMEM);
1312 result = AVERROR_INVALIDDATA;
1319 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1321 bz_stream bzstream = { 0 };
1322 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1324 bzstream.next_in = data;
1325 bzstream.avail_in = isize;
1328 newpktdata = av_realloc(pkt_data, pkt_size);
1330 BZ2_bzDecompressEnd(&bzstream);
1331 result = AVERROR(ENOMEM);
1334 pkt_data = newpktdata;
1335 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1336 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1337 result = BZ2_bzDecompress(&bzstream);
1338 } while (result == BZ_OK && pkt_size < 10000000);
1339 pkt_size = bzstream.total_out_lo32;
1340 BZ2_bzDecompressEnd(&bzstream);
1341 if (result != BZ_STREAM_END) {
1342 if (result == BZ_MEM_ERROR)
1343 result = AVERROR(ENOMEM);
1345 result = AVERROR_INVALIDDATA;
1352 return AVERROR_INVALIDDATA;
1356 *buf_size = pkt_size;
1364 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1365 AVDictionary **metadata, char *prefix)
1367 MatroskaTag *tags = list->elem;
1371 for (i = 0; i < list->nb_elem; i++) {
1372 const char *lang = tags[i].lang &&
1373 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1375 if (!tags[i].name) {
1376 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1380 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1382 av_strlcpy(key, tags[i].name, sizeof(key));
1383 if (tags[i].def || !lang) {
1384 av_dict_set(metadata, key, tags[i].string, 0);
1385 if (tags[i].sub.nb_elem)
1386 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1389 av_strlcat(key, "-", sizeof(key));
1390 av_strlcat(key, lang, sizeof(key));
1391 av_dict_set(metadata, key, tags[i].string, 0);
1392 if (tags[i].sub.nb_elem)
1393 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1396 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1399 static void matroska_convert_tags(AVFormatContext *s)
1401 MatroskaDemuxContext *matroska = s->priv_data;
1402 MatroskaTags *tags = matroska->tags.elem;
1405 for (i = 0; i < matroska->tags.nb_elem; i++) {
1406 if (tags[i].target.attachuid) {
1407 MatroskaAttachment *attachment = matroska->attachments.elem;
1408 for (j = 0; j < matroska->attachments.nb_elem; j++)
1409 if (attachment[j].uid == tags[i].target.attachuid &&
1410 attachment[j].stream)
1411 matroska_convert_tag(s, &tags[i].tag,
1412 &attachment[j].stream->metadata, NULL);
1413 } else if (tags[i].target.chapteruid) {
1414 MatroskaChapter *chapter = matroska->chapters.elem;
1415 for (j = 0; j < matroska->chapters.nb_elem; j++)
1416 if (chapter[j].uid == tags[i].target.chapteruid &&
1418 matroska_convert_tag(s, &tags[i].tag,
1419 &chapter[j].chapter->metadata, NULL);
1420 } else if (tags[i].target.trackuid) {
1421 MatroskaTrack *track = matroska->tracks.elem;
1422 for (j = 0; j < matroska->tracks.nb_elem; j++)
1423 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1424 matroska_convert_tag(s, &tags[i].tag,
1425 &track[j].stream->metadata, NULL);
1427 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1428 tags[i].target.type);
1433 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1436 uint32_t level_up = matroska->level_up;
1437 uint32_t saved_id = matroska->current_id;
1438 int64_t before_pos = avio_tell(matroska->ctx->pb);
1439 MatroskaLevel level;
1444 offset = pos + matroska->segment_start;
1445 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1446 /* We don't want to lose our seekhead level, so we add
1447 * a dummy. This is a crude hack. */
1448 if (matroska->num_levels == EBML_MAX_DEPTH) {
1449 av_log(matroska->ctx, AV_LOG_INFO,
1450 "Max EBML element depth (%d) reached, "
1451 "cannot parse further.\n", EBML_MAX_DEPTH);
1452 ret = AVERROR_INVALIDDATA;
1455 level.length = (uint64_t) -1;
1456 matroska->levels[matroska->num_levels] = level;
1457 matroska->num_levels++;
1458 matroska->current_id = 0;
1460 ret = ebml_parse(matroska, matroska_segment, matroska);
1462 /* remove dummy level */
1463 while (matroska->num_levels) {
1464 uint64_t length = matroska->levels[--matroska->num_levels].length;
1465 if (length == (uint64_t) -1)
1471 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1472 matroska->level_up = level_up;
1473 matroska->current_id = saved_id;
1478 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1480 EbmlList *seekhead_list = &matroska->seekhead;
1483 // we should not do any seeking in the streaming case
1484 if (!matroska->ctx->pb->seekable)
1487 for (i = 0; i < seekhead_list->nb_elem; i++) {
1488 MatroskaSeekhead *seekheads = seekhead_list->elem;
1489 uint32_t id = seekheads[i].id;
1490 uint64_t pos = seekheads[i].pos;
1492 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1493 if (!elem || elem->parsed)
1498 // defer cues parsing until we actually need cue data.
1499 if (id == MATROSKA_ID_CUES)
1502 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1503 // mark index as broken
1504 matroska->cues_parsing_deferred = -1;
1512 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1514 EbmlList *index_list;
1515 MatroskaIndex *index;
1516 uint64_t index_scale = 1;
1519 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1522 index_list = &matroska->index;
1523 index = index_list->elem;
1524 if (index_list->nb_elem < 2)
1526 if (index[1].time > 1E14 / matroska->time_scale) {
1527 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1530 for (i = 0; i < index_list->nb_elem; i++) {
1531 EbmlList *pos_list = &index[i].pos;
1532 MatroskaIndexPos *pos = pos_list->elem;
1533 for (j = 0; j < pos_list->nb_elem; j++) {
1534 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1536 if (track && track->stream)
1537 av_add_index_entry(track->stream,
1538 pos[j].pos + matroska->segment_start,
1539 index[i].time / index_scale, 0, 0,
1545 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1548 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1551 for (i = 0; i < matroska->num_level1_elems; i++) {
1552 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1553 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1554 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1555 matroska->cues_parsing_deferred = -1;
1561 matroska_add_index_entries(matroska);
1564 static int matroska_aac_profile(char *codec_id)
1566 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1569 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1570 if (strstr(codec_id, aac_profiles[profile]))
1575 static int matroska_aac_sri(int samplerate)
1579 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1580 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1585 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1588 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1589 time_t creation_time = date_utc / 1000000000 + 978307200;
1590 struct tm tmpbuf, *ptm = gmtime_r(&creation_time, &tmpbuf);
1592 if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1593 av_dict_set(metadata, "creation_time", buffer, 0);
1596 static int matroska_parse_flac(AVFormatContext *s,
1597 MatroskaTrack *track,
1600 AVStream *st = track->stream;
1601 uint8_t *p = track->codec_priv.data;
1602 int size = track->codec_priv.size;
1604 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1605 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1606 track->codec_priv.size = 0;
1610 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1612 p += track->codec_priv.size;
1613 size -= track->codec_priv.size;
1615 /* parse the remaining metadata blocks if present */
1617 int block_last, block_type, block_size;
1619 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1623 if (block_size > size)
1626 /* check for the channel mask */
1627 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1628 AVDictionary *dict = NULL;
1629 AVDictionaryEntry *chmask;
1631 ff_vorbis_comment(s, &dict, p, block_size, 0);
1632 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1634 uint64_t mask = strtol(chmask->value, NULL, 0);
1635 if (!mask || mask & ~0x3ffffULL) {
1636 av_log(s, AV_LOG_WARNING,
1637 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1639 st->codec->channel_layout = mask;
1641 av_dict_free(&dict);
1651 static int matroska_parse_tracks(AVFormatContext *s)
1653 MatroskaDemuxContext *matroska = s->priv_data;
1654 MatroskaTrack *tracks = matroska->tracks.elem;
1659 for (i = 0; i < matroska->tracks.nb_elem; i++) {
1660 MatroskaTrack *track = &tracks[i];
1661 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1662 EbmlList *encodings_list = &track->encodings;
1663 MatroskaTrackEncoding *encodings = encodings_list->elem;
1664 uint8_t *extradata = NULL;
1665 int extradata_size = 0;
1666 int extradata_offset = 0;
1667 uint32_t fourcc = 0;
1669 char* key_id_base64 = NULL;
1672 /* Apply some sanity checks. */
1673 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1674 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1675 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1676 track->type != MATROSKA_TRACK_TYPE_METADATA) {
1677 av_log(matroska->ctx, AV_LOG_INFO,
1678 "Unknown or unsupported track type %"PRIu64"\n",
1682 if (!track->codec_id)
1685 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
1686 isnan(track->audio.samplerate)) {
1687 av_log(matroska->ctx, AV_LOG_WARNING,
1688 "Invalid sample rate %f, defaulting to 8000 instead.\n",
1689 track->audio.samplerate);
1690 track->audio.samplerate = 8000;
1693 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1694 if (!track->default_duration && track->video.frame_rate > 0)
1695 track->default_duration = 1000000000 / track->video.frame_rate;
1696 if (track->video.display_width == -1)
1697 track->video.display_width = track->video.pixel_width;
1698 if (track->video.display_height == -1)
1699 track->video.display_height = track->video.pixel_height;
1700 if (track->video.color_space.size == 4)
1701 fourcc = AV_RL32(track->video.color_space.data);
1702 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1703 if (!track->audio.out_samplerate)
1704 track->audio.out_samplerate = track->audio.samplerate;
1706 if (encodings_list->nb_elem > 1) {
1707 av_log(matroska->ctx, AV_LOG_ERROR,
1708 "Multiple combined encodings not supported");
1709 } else if (encodings_list->nb_elem == 1) {
1710 if (encodings[0].type) {
1711 if (encodings[0].encryption.key_id.size > 0) {
1712 /* Save the encryption key id to be stored later as a
1714 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1715 key_id_base64 = av_malloc(b64_size);
1716 if (key_id_base64 == NULL)
1717 return AVERROR(ENOMEM);
1719 av_base64_encode(key_id_base64, b64_size,
1720 encodings[0].encryption.key_id.data,
1721 encodings[0].encryption.key_id.size);
1723 encodings[0].scope = 0;
1724 av_log(matroska->ctx, AV_LOG_ERROR,
1725 "Unsupported encoding type");
1729 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1732 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1735 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1737 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
1738 encodings[0].scope = 0;
1739 av_log(matroska->ctx, AV_LOG_ERROR,
1740 "Unsupported encoding type");
1741 } else if (track->codec_priv.size && encodings[0].scope & 2) {
1742 uint8_t *codec_priv = track->codec_priv.data;
1743 int ret = matroska_decode_buffer(&track->codec_priv.data,
1744 &track->codec_priv.size,
1747 track->codec_priv.data = NULL;
1748 track->codec_priv.size = 0;
1749 av_log(matroska->ctx, AV_LOG_ERROR,
1750 "Failed to decode codec private data\n");
1753 if (codec_priv != track->codec_priv.data)
1754 av_free(codec_priv);
1758 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1759 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1760 strlen(ff_mkv_codec_tags[j].str))) {
1761 codec_id = ff_mkv_codec_tags[j].id;
1766 st = track->stream = avformat_new_stream(s, NULL);
1768 av_free(key_id_base64);
1769 return AVERROR(ENOMEM);
1772 if (key_id_base64) {
1773 /* export encryption key id as base64 metadata tag */
1774 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
1775 av_freep(&key_id_base64);
1778 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1779 track->codec_priv.size >= 40 &&
1780 track->codec_priv.data) {
1781 track->ms_compat = 1;
1782 bit_depth = AV_RL16(track->codec_priv.data + 14);
1783 fourcc = AV_RL32(track->codec_priv.data + 16);
1784 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
1787 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
1789 extradata_offset = 40;
1790 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1791 track->codec_priv.size >= 14 &&
1792 track->codec_priv.data) {
1794 ffio_init_context(&b, track->codec_priv.data,
1795 track->codec_priv.size,
1796 0, NULL, NULL, NULL, NULL);
1797 ret = ff_get_wav_header(s, &b, st->codec, track->codec_priv.size, 0);
1800 codec_id = st->codec->codec_id;
1801 extradata_offset = FFMIN(track->codec_priv.size, 18);
1802 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
1803 && (track->codec_priv.size >= 86)
1804 && (track->codec_priv.data)) {
1805 fourcc = AV_RL32(track->codec_priv.data + 4);
1806 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1807 if (ff_codec_get_id(ff_codec_movaudio_tags, AV_RL32(track->codec_priv.data))) {
1808 fourcc = AV_RL32(track->codec_priv.data);
1809 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1811 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1812 (track->codec_priv.size >= 21) &&
1813 (track->codec_priv.data)) {
1814 fourcc = AV_RL32(track->codec_priv.data + 4);
1815 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1816 if (ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(track->codec_priv.data))) {
1817 fourcc = AV_RL32(track->codec_priv.data);
1818 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1820 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI "))
1821 codec_id = AV_CODEC_ID_SVQ3;
1822 if (codec_id == AV_CODEC_ID_NONE) {
1824 av_get_codec_tag_string(buf, sizeof(buf), fourcc);
1825 av_log(matroska->ctx, AV_LOG_ERROR,
1826 "mov FourCC not found %s.\n", buf);
1828 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1829 switch (track->audio.bitdepth) {
1831 codec_id = AV_CODEC_ID_PCM_U8;
1834 codec_id = AV_CODEC_ID_PCM_S24BE;
1837 codec_id = AV_CODEC_ID_PCM_S32BE;
1840 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1841 switch (track->audio.bitdepth) {
1843 codec_id = AV_CODEC_ID_PCM_U8;
1846 codec_id = AV_CODEC_ID_PCM_S24LE;
1849 codec_id = AV_CODEC_ID_PCM_S32LE;
1852 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1853 track->audio.bitdepth == 64) {
1854 codec_id = AV_CODEC_ID_PCM_F64LE;
1855 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1856 int profile = matroska_aac_profile(track->codec_id);
1857 int sri = matroska_aac_sri(track->audio.samplerate);
1858 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
1860 return AVERROR(ENOMEM);
1861 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1862 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1863 if (strstr(track->codec_id, "SBR")) {
1864 sri = matroska_aac_sri(track->audio.out_samplerate);
1865 extradata[2] = 0x56;
1866 extradata[3] = 0xE5;
1867 extradata[4] = 0x80 | (sri << 3);
1871 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
1872 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1873 * Create the "atom size", "tag", and "tag version" fields the
1874 * decoder expects manually. */
1875 extradata_size = 12 + track->codec_priv.size;
1876 extradata = av_mallocz(extradata_size +
1877 AV_INPUT_BUFFER_PADDING_SIZE);
1879 return AVERROR(ENOMEM);
1880 AV_WB32(extradata, extradata_size);
1881 memcpy(&extradata[4], "alac", 4);
1882 AV_WB32(&extradata[8], 0);
1883 memcpy(&extradata[12], track->codec_priv.data,
1884 track->codec_priv.size);
1885 } else if (codec_id == AV_CODEC_ID_TTA) {
1886 extradata_size = 30;
1887 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
1889 return AVERROR(ENOMEM);
1890 ffio_init_context(&b, extradata, extradata_size, 1,
1891 NULL, NULL, NULL, NULL);
1892 avio_write(&b, "TTA1", 4);
1894 if (track->audio.channels > UINT16_MAX ||
1895 track->audio.bitdepth > UINT16_MAX) {
1896 av_log(matroska->ctx, AV_LOG_WARNING,
1897 "Too large audio channel number %"PRIu64
1898 " or bitdepth %"PRIu64". Skipping track.\n",
1899 track->audio.channels, track->audio.bitdepth);
1900 av_freep(&extradata);
1901 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
1902 return AVERROR_INVALIDDATA;
1906 avio_wl16(&b, track->audio.channels);
1907 avio_wl16(&b, track->audio.bitdepth);
1908 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
1909 return AVERROR_INVALIDDATA;
1910 avio_wl32(&b, track->audio.out_samplerate);
1911 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
1912 track->audio.out_samplerate,
1913 AV_TIME_BASE * 1000));
1914 } else if (codec_id == AV_CODEC_ID_RV10 ||
1915 codec_id == AV_CODEC_ID_RV20 ||
1916 codec_id == AV_CODEC_ID_RV30 ||
1917 codec_id == AV_CODEC_ID_RV40) {
1918 extradata_offset = 26;
1919 } else if (codec_id == AV_CODEC_ID_RA_144) {
1920 track->audio.out_samplerate = 8000;
1921 track->audio.channels = 1;
1922 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
1923 codec_id == AV_CODEC_ID_COOK ||
1924 codec_id == AV_CODEC_ID_ATRAC3 ||
1925 codec_id == AV_CODEC_ID_SIPR)
1926 && track->codec_priv.data) {
1929 ffio_init_context(&b, track->codec_priv.data,
1930 track->codec_priv.size,
1931 0, NULL, NULL, NULL, NULL);
1933 flavor = avio_rb16(&b);
1934 track->audio.coded_framesize = avio_rb32(&b);
1936 track->audio.sub_packet_h = avio_rb16(&b);
1937 track->audio.frame_size = avio_rb16(&b);
1938 track->audio.sub_packet_size = avio_rb16(&b);
1940 track->audio.coded_framesize <= 0 ||
1941 track->audio.sub_packet_h <= 0 ||
1942 track->audio.frame_size <= 0 ||
1943 track->audio.sub_packet_size <= 0)
1944 return AVERROR_INVALIDDATA;
1945 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
1946 track->audio.frame_size);
1947 if (!track->audio.buf)
1948 return AVERROR(ENOMEM);
1949 if (codec_id == AV_CODEC_ID_RA_288) {
1950 st->codec->block_align = track->audio.coded_framesize;
1951 track->codec_priv.size = 0;
1953 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1954 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1955 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1956 st->codec->bit_rate = sipr_bit_rate[flavor];
1958 st->codec->block_align = track->audio.sub_packet_size;
1959 extradata_offset = 78;
1961 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1962 ret = matroska_parse_flac(s, track, &extradata_offset);
1965 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
1966 fourcc = AV_RL32(track->codec_priv.data);
1968 track->codec_priv.size -= extradata_offset;
1970 if (codec_id == AV_CODEC_ID_NONE)
1971 av_log(matroska->ctx, AV_LOG_INFO,
1972 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1974 if (track->time_scale < 0.01)
1975 track->time_scale = 1.0;
1976 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1977 1000 * 1000 * 1000); /* 64 bit pts in ns */
1979 /* convert the delay from ns to the track timebase */
1980 track->codec_delay = av_rescale_q(track->codec_delay,
1981 (AVRational){ 1, 1000000000 },
1984 st->codec->codec_id = codec_id;
1986 if (strcmp(track->language, "und"))
1987 av_dict_set(&st->metadata, "language", track->language, 0);
1988 av_dict_set(&st->metadata, "title", track->name, 0);
1990 if (track->flag_default)
1991 st->disposition |= AV_DISPOSITION_DEFAULT;
1992 if (track->flag_forced)
1993 st->disposition |= AV_DISPOSITION_FORCED;
1995 if (!st->codec->extradata) {
1997 st->codec->extradata = extradata;
1998 st->codec->extradata_size = extradata_size;
1999 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2000 if (ff_alloc_extradata(st->codec, track->codec_priv.size))
2001 return AVERROR(ENOMEM);
2002 memcpy(st->codec->extradata,
2003 track->codec_priv.data + extradata_offset,
2004 track->codec_priv.size);
2008 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2009 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2011 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
2012 st->codec->codec_tag = fourcc;
2014 st->codec->bits_per_coded_sample = bit_depth;
2015 st->codec->width = track->video.pixel_width;
2016 st->codec->height = track->video.pixel_height;
2017 av_reduce(&st->sample_aspect_ratio.num,
2018 &st->sample_aspect_ratio.den,
2019 st->codec->height * track->video.display_width,
2020 st->codec->width * track->video.display_height,
2022 if (st->codec->codec_id != AV_CODEC_ID_HEVC)
2023 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2025 if (track->default_duration) {
2026 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2027 1000000000, track->default_duration, 30000);
2028 #if FF_API_R_FRAME_RATE
2029 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2030 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2031 st->r_frame_rate = st->avg_frame_rate;
2035 /* export stereo mode flag as metadata tag */
2036 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2037 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2039 /* export alpha mode flag as metadata tag */
2040 if (track->video.alpha_mode)
2041 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2043 /* if we have virtual track, mark the real tracks */
2044 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2046 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2048 snprintf(buf, sizeof(buf), "%s_%d",
2049 ff_matroska_video_stereo_plane[planes[j].type], i);
2050 for (k=0; k < matroska->tracks.nb_elem; k++)
2051 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2052 av_dict_set(&tracks[k].stream->metadata,
2053 "stereo_mode", buf, 0);
2057 // add stream level stereo3d side data if it is a supported format
2058 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2059 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2060 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2064 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2065 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
2066 st->codec->sample_rate = track->audio.out_samplerate;
2067 st->codec->channels = track->audio.channels;
2068 if (!st->codec->bits_per_coded_sample)
2069 st->codec->bits_per_coded_sample = track->audio.bitdepth;
2070 if (st->codec->codec_id == AV_CODEC_ID_MP3)
2071 st->need_parsing = AVSTREAM_PARSE_FULL;
2072 else if (st->codec->codec_id != AV_CODEC_ID_AAC)
2073 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2074 if (track->codec_delay > 0) {
2075 st->codec->delay = av_rescale_q(track->codec_delay,
2077 (AVRational){1, st->codec->sample_rate});
2079 if (track->seek_preroll > 0) {
2080 av_codec_set_seek_preroll(st->codec,
2081 av_rescale_q(track->seek_preroll,
2082 (AVRational){1, 1000000000},
2083 (AVRational){1, st->codec->sample_rate}));
2085 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2086 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2088 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2089 st->disposition |= AV_DISPOSITION_CAPTIONS;
2090 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2091 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2092 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2093 st->disposition |= AV_DISPOSITION_METADATA;
2095 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2096 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2097 if (st->codec->codec_id == AV_CODEC_ID_ASS)
2098 matroska->contains_ssa = 1;
2105 static int matroska_read_header(AVFormatContext *s)
2107 MatroskaDemuxContext *matroska = s->priv_data;
2108 EbmlList *attachments_list = &matroska->attachments;
2109 EbmlList *chapters_list = &matroska->chapters;
2110 MatroskaAttachment *attachments;
2111 MatroskaChapter *chapters;
2112 uint64_t max_start = 0;
2118 matroska->cues_parsing_deferred = 1;
2120 /* First read the EBML header. */
2121 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2122 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2123 ebml_free(ebml_syntax, &ebml);
2124 return AVERROR_INVALIDDATA;
2126 if (ebml.version > EBML_VERSION ||
2127 ebml.max_size > sizeof(uint64_t) ||
2128 ebml.id_length > sizeof(uint32_t) ||
2129 ebml.doctype_version > 3) {
2130 av_log(matroska->ctx, AV_LOG_ERROR,
2131 "EBML header using unsupported features\n"
2132 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2133 ebml.version, ebml.doctype, ebml.doctype_version);
2134 ebml_free(ebml_syntax, &ebml);
2135 return AVERROR_PATCHWELCOME;
2136 } else if (ebml.doctype_version == 3) {
2137 av_log(matroska->ctx, AV_LOG_WARNING,
2138 "EBML header using unsupported features\n"
2139 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2140 ebml.version, ebml.doctype, ebml.doctype_version);
2142 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2143 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2145 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2146 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2147 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2148 ebml_free(ebml_syntax, &ebml);
2149 return AVERROR_INVALIDDATA;
2152 ebml_free(ebml_syntax, &ebml);
2154 /* The next thing is a segment. */
2155 pos = avio_tell(matroska->ctx->pb);
2156 res = ebml_parse(matroska, matroska_segments, matroska);
2157 // try resyncing until we find a EBML_STOP type element.
2159 res = matroska_resync(matroska, pos);
2162 pos = avio_tell(matroska->ctx->pb);
2163 res = ebml_parse(matroska, matroska_segment, matroska);
2165 matroska_execute_seekhead(matroska);
2167 if (!matroska->time_scale)
2168 matroska->time_scale = 1000000;
2169 if (matroska->duration)
2170 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2171 1000 / AV_TIME_BASE;
2172 av_dict_set(&s->metadata, "title", matroska->title, 0);
2173 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2175 if (matroska->date_utc.size == 8)
2176 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2178 res = matroska_parse_tracks(s);
2182 attachments = attachments_list->elem;
2183 for (j = 0; j < attachments_list->nb_elem; j++) {
2184 if (!(attachments[j].filename && attachments[j].mime &&
2185 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2186 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2188 AVStream *st = avformat_new_stream(s, NULL);
2191 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2192 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2193 st->codec->codec_id = AV_CODEC_ID_NONE;
2195 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2196 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2197 strlen(ff_mkv_image_mime_tags[i].str))) {
2198 st->codec->codec_id = ff_mkv_image_mime_tags[i].id;
2203 attachments[j].stream = st;
2205 if (st->codec->codec_id != AV_CODEC_ID_NONE) {
2206 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2207 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
2209 av_init_packet(&st->attached_pic);
2210 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2212 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2213 st->attached_pic.stream_index = st->index;
2214 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2216 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2217 if (ff_alloc_extradata(st->codec, attachments[j].bin.size))
2219 memcpy(st->codec->extradata, attachments[j].bin.data,
2220 attachments[j].bin.size);
2222 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2223 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2224 strlen(ff_mkv_mime_tags[i].str))) {
2225 st->codec->codec_id = ff_mkv_mime_tags[i].id;
2233 chapters = chapters_list->elem;
2234 for (i = 0; i < chapters_list->nb_elem; i++)
2235 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2236 (max_start == 0 || chapters[i].start > max_start)) {
2237 chapters[i].chapter =
2238 avpriv_new_chapter(s, chapters[i].uid,
2239 (AVRational) { 1, 1000000000 },
2240 chapters[i].start, chapters[i].end,
2242 if (chapters[i].chapter) {
2243 av_dict_set(&chapters[i].chapter->metadata,
2244 "title", chapters[i].title, 0);
2246 max_start = chapters[i].start;
2249 matroska_add_index_entries(matroska);
2251 matroska_convert_tags(s);
2257 * Put one packet in an application-supplied AVPacket struct.
2258 * Returns 0 on success or -1 on failure.
2260 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2263 if (matroska->num_packets > 0) {
2264 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2265 av_freep(&matroska->packets[0]);
2266 if (matroska->num_packets > 1) {
2268 memmove(&matroska->packets[0], &matroska->packets[1],
2269 (matroska->num_packets - 1) * sizeof(AVPacket *));
2270 newpackets = av_realloc(matroska->packets,
2271 (matroska->num_packets - 1) *
2272 sizeof(AVPacket *));
2274 matroska->packets = newpackets;
2276 av_freep(&matroska->packets);
2277 matroska->prev_pkt = NULL;
2279 matroska->num_packets--;
2287 * Free all packets in our internal queue.
2289 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2291 matroska->prev_pkt = NULL;
2292 if (matroska->packets) {
2294 for (n = 0; n < matroska->num_packets; n++) {
2295 av_packet_unref(matroska->packets[n]);
2296 av_freep(&matroska->packets[n]);
2298 av_freep(&matroska->packets);
2299 matroska->num_packets = 0;
2303 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2304 int *buf_size, int type,
2305 uint32_t **lace_buf, int *laces)
2307 int res = 0, n, size = *buf_size;
2308 uint8_t *data = *buf;
2309 uint32_t *lace_size;
2313 *lace_buf = av_mallocz(sizeof(int));
2315 return AVERROR(ENOMEM);
2317 *lace_buf[0] = size;
2321 av_assert0(size > 0);
2325 lace_size = av_mallocz(*laces * sizeof(int));
2327 return AVERROR(ENOMEM);
2330 case 0x1: /* Xiph lacing */
2334 for (n = 0; res == 0 && n < *laces - 1; n++) {
2336 if (size <= total) {
2337 res = AVERROR_INVALIDDATA;
2342 lace_size[n] += temp;
2349 if (size <= total) {
2350 res = AVERROR_INVALIDDATA;
2354 lace_size[n] = size - total;
2358 case 0x2: /* fixed-size lacing */
2359 if (size % (*laces)) {
2360 res = AVERROR_INVALIDDATA;
2363 for (n = 0; n < *laces; n++)
2364 lace_size[n] = size / *laces;
2367 case 0x3: /* EBML lacing */
2371 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2372 if (n < 0 || num > INT_MAX) {
2373 av_log(matroska->ctx, AV_LOG_INFO,
2374 "EBML block data error\n");
2375 res = n<0 ? n : AVERROR_INVALIDDATA;
2380 total = lace_size[0] = num;
2381 for (n = 1; res == 0 && n < *laces - 1; n++) {
2384 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2385 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2386 av_log(matroska->ctx, AV_LOG_INFO,
2387 "EBML block data error\n");
2388 res = r<0 ? r : AVERROR_INVALIDDATA;
2393 lace_size[n] = lace_size[n - 1] + snum;
2394 total += lace_size[n];
2396 if (size <= total) {
2397 res = AVERROR_INVALIDDATA;
2400 lace_size[*laces - 1] = size - total;
2406 *lace_buf = lace_size;
2412 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2413 MatroskaTrack *track, AVStream *st,
2414 uint8_t *data, int size, uint64_t timecode,
2417 int a = st->codec->block_align;
2418 int sps = track->audio.sub_packet_size;
2419 int cfs = track->audio.coded_framesize;
2420 int h = track->audio.sub_packet_h;
2421 int y = track->audio.sub_packet_cnt;
2422 int w = track->audio.frame_size;
2425 if (!track->audio.pkt_cnt) {
2426 if (track->audio.sub_packet_cnt == 0)
2427 track->audio.buf_timecode = timecode;
2428 if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2429 if (size < cfs * h / 2) {
2430 av_log(matroska->ctx, AV_LOG_ERROR,
2431 "Corrupt int4 RM-style audio packet size\n");
2432 return AVERROR_INVALIDDATA;
2434 for (x = 0; x < h / 2; x++)
2435 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2436 data + x * cfs, cfs);
2437 } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2439 av_log(matroska->ctx, AV_LOG_ERROR,
2440 "Corrupt sipr RM-style audio packet size\n");
2441 return AVERROR_INVALIDDATA;
2443 memcpy(track->audio.buf + y * w, data, w);
2445 if (size < sps * w / sps || h<=0 || w%sps) {
2446 av_log(matroska->ctx, AV_LOG_ERROR,
2447 "Corrupt generic RM-style audio packet size\n");
2448 return AVERROR_INVALIDDATA;
2450 for (x = 0; x < w / sps; x++)
2451 memcpy(track->audio.buf +
2452 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2453 data + x * sps, sps);
2456 if (++track->audio.sub_packet_cnt >= h) {
2457 if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2458 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2459 track->audio.sub_packet_cnt = 0;
2460 track->audio.pkt_cnt = h * w / a;
2464 while (track->audio.pkt_cnt) {
2466 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2468 return AVERROR(ENOMEM);
2470 ret = av_new_packet(pkt, a);
2476 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2478 pkt->pts = track->audio.buf_timecode;
2479 track->audio.buf_timecode = AV_NOPTS_VALUE;
2481 pkt->stream_index = st->index;
2482 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2488 /* reconstruct full wavpack blocks from mangled matroska ones */
2489 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2490 uint8_t **pdst, int *size)
2492 uint8_t *dst = NULL;
2497 int ret, offset = 0;
2499 if (srclen < 12 || track->stream->codec->extradata_size < 2)
2500 return AVERROR_INVALIDDATA;
2502 ver = AV_RL16(track->stream->codec->extradata);
2504 samples = AV_RL32(src);
2508 while (srclen >= 8) {
2513 uint32_t flags = AV_RL32(src);
2514 uint32_t crc = AV_RL32(src + 4);
2518 multiblock = (flags & 0x1800) != 0x1800;
2521 ret = AVERROR_INVALIDDATA;
2524 blocksize = AV_RL32(src);
2530 if (blocksize > srclen) {
2531 ret = AVERROR_INVALIDDATA;
2535 tmp = av_realloc(dst, dstlen + blocksize + 32);
2537 ret = AVERROR(ENOMEM);
2541 dstlen += blocksize + 32;
2543 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2544 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2545 AV_WL16(dst + offset + 8, ver); // version
2546 AV_WL16(dst + offset + 10, 0); // track/index_no
2547 AV_WL32(dst + offset + 12, 0); // total samples
2548 AV_WL32(dst + offset + 16, 0); // block index
2549 AV_WL32(dst + offset + 20, samples); // number of samples
2550 AV_WL32(dst + offset + 24, flags); // flags
2551 AV_WL32(dst + offset + 28, crc); // crc
2552 memcpy(dst + offset + 32, src, blocksize); // block data
2555 srclen -= blocksize;
2556 offset += blocksize + 32;
2569 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
2570 MatroskaTrack *track,
2572 uint8_t *data, int data_len,
2578 uint8_t *id, *settings, *text, *buf;
2579 int id_len, settings_len, text_len;
2584 return AVERROR_INVALIDDATA;
2587 q = data + data_len;
2592 if (*p == '\r' || *p == '\n') {
2601 if (p >= q || *p != '\n')
2602 return AVERROR_INVALIDDATA;
2608 if (*p == '\r' || *p == '\n') {
2609 settings_len = p - settings;
2617 if (p >= q || *p != '\n')
2618 return AVERROR_INVALIDDATA;
2623 while (text_len > 0) {
2624 const int len = text_len - 1;
2625 const uint8_t c = p[len];
2626 if (c != '\r' && c != '\n')
2632 return AVERROR_INVALIDDATA;
2634 pkt = av_mallocz(sizeof(*pkt));
2636 return AVERROR(ENOMEM);
2637 err = av_new_packet(pkt, text_len);
2640 return AVERROR(err);
2643 memcpy(pkt->data, text, text_len);
2646 buf = av_packet_new_side_data(pkt,
2647 AV_PKT_DATA_WEBVTT_IDENTIFIER,
2651 return AVERROR(ENOMEM);
2653 memcpy(buf, id, id_len);
2656 if (settings_len > 0) {
2657 buf = av_packet_new_side_data(pkt,
2658 AV_PKT_DATA_WEBVTT_SETTINGS,
2662 return AVERROR(ENOMEM);
2664 memcpy(buf, settings, settings_len);
2667 // Do we need this for subtitles?
2668 // pkt->flags = AV_PKT_FLAG_KEY;
2670 pkt->stream_index = st->index;
2671 pkt->pts = timecode;
2673 // Do we need this for subtitles?
2674 // pkt->dts = timecode;
2676 pkt->duration = duration;
2679 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2680 matroska->prev_pkt = pkt;
2685 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2686 MatroskaTrack *track, AVStream *st,
2687 uint8_t *data, int pkt_size,
2688 uint64_t timecode, uint64_t lace_duration,
2689 int64_t pos, int is_keyframe,
2690 uint8_t *additional, uint64_t additional_id, int additional_size,
2691 int64_t discard_padding)
2693 MatroskaTrackEncoding *encodings = track->encodings.elem;
2694 uint8_t *pkt_data = data;
2695 int offset = 0, res;
2698 if (encodings && !encodings->type && encodings->scope & 1) {
2699 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2704 if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2706 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2708 av_log(matroska->ctx, AV_LOG_ERROR,
2709 "Error parsing a wavpack block.\n");
2712 if (pkt_data != data)
2713 av_freep(&pkt_data);
2717 if (st->codec->codec_id == AV_CODEC_ID_PRORES &&
2718 AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
2721 pkt = av_mallocz(sizeof(AVPacket));
2723 if (pkt_data != data)
2724 av_freep(&pkt_data);
2725 return AVERROR(ENOMEM);
2727 /* XXX: prevent data copy... */
2728 if (av_new_packet(pkt, pkt_size + offset) < 0) {
2730 res = AVERROR(ENOMEM);
2734 if (st->codec->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
2735 uint8_t *buf = pkt->data;
2736 bytestream_put_be32(&buf, pkt_size);
2737 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2740 memcpy(pkt->data + offset, pkt_data, pkt_size);
2742 if (pkt_data != data)
2743 av_freep(&pkt_data);
2745 pkt->flags = is_keyframe;
2746 pkt->stream_index = st->index;
2748 if (additional_size > 0) {
2749 uint8_t *side_data = av_packet_new_side_data(pkt,
2750 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2751 additional_size + 8);
2753 av_packet_unref(pkt);
2755 return AVERROR(ENOMEM);
2757 AV_WB64(side_data, additional_id);
2758 memcpy(side_data + 8, additional, additional_size);
2761 if (discard_padding) {
2762 uint8_t *side_data = av_packet_new_side_data(pkt,
2763 AV_PKT_DATA_SKIP_SAMPLES,
2766 av_packet_unref(pkt);
2768 return AVERROR(ENOMEM);
2770 AV_WL32(side_data, 0);
2771 AV_WL32(side_data + 4, av_rescale_q(discard_padding,
2772 (AVRational){1, 1000000000},
2773 (AVRational){1, st->codec->sample_rate}));
2776 if (track->ms_compat)
2777 pkt->dts = timecode;
2779 pkt->pts = timecode;
2781 pkt->duration = lace_duration;
2783 #if FF_API_CONVERGENCE_DURATION
2784 FF_DISABLE_DEPRECATION_WARNINGS
2785 if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
2786 pkt->convergence_duration = lace_duration;
2788 FF_ENABLE_DEPRECATION_WARNINGS
2791 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2792 matroska->prev_pkt = pkt;
2797 if (pkt_data != data)
2798 av_freep(&pkt_data);
2802 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2803 int size, int64_t pos, uint64_t cluster_time,
2804 uint64_t block_duration, int is_keyframe,
2805 uint8_t *additional, uint64_t additional_id, int additional_size,
2806 int64_t cluster_pos, int64_t discard_padding)
2808 uint64_t timecode = AV_NOPTS_VALUE;
2809 MatroskaTrack *track;
2813 uint32_t *lace_size = NULL;
2814 int n, flags, laces = 0;
2816 int trust_default_duration = 1;
2818 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2819 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2825 track = matroska_find_track_by_num(matroska, num);
2826 if (!track || !track->stream) {
2827 av_log(matroska->ctx, AV_LOG_INFO,
2828 "Invalid stream %"PRIu64" or size %u\n", num, size);
2829 return AVERROR_INVALIDDATA;
2830 } else if (size <= 3)
2833 if (st->discard >= AVDISCARD_ALL)
2835 av_assert1(block_duration != AV_NOPTS_VALUE);
2837 block_time = sign_extend(AV_RB16(data), 16);
2841 if (is_keyframe == -1)
2842 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2844 if (cluster_time != (uint64_t) -1 &&
2845 (block_time >= 0 || cluster_time >= -block_time)) {
2846 timecode = cluster_time + block_time - track->codec_delay;
2847 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2848 timecode < track->end_timecode)
2849 is_keyframe = 0; /* overlapping subtitles are not key frame */
2851 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2855 if (matroska->skip_to_keyframe &&
2856 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2857 if (timecode < matroska->skip_to_timecode)
2860 matroska->skip_to_keyframe = 0;
2861 else if (!st->skip_to_keyframe) {
2862 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
2863 matroska->skip_to_keyframe = 0;
2867 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2868 &lace_size, &laces);
2873 if (track->audio.samplerate == 8000) {
2874 // If this is needed for more codecs, then add them here
2875 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
2876 if (track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
2877 trust_default_duration = 0;
2881 if (!block_duration && trust_default_duration)
2882 block_duration = track->default_duration * laces / matroska->time_scale;
2884 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
2885 track->end_timecode =
2886 FFMAX(track->end_timecode, timecode + block_duration);
2888 for (n = 0; n < laces; n++) {
2889 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
2891 if (lace_size[n] > size) {
2892 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
2896 if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2897 st->codec->codec_id == AV_CODEC_ID_COOK ||
2898 st->codec->codec_id == AV_CODEC_ID_SIPR ||
2899 st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2900 st->codec->block_align && track->audio.sub_packet_size) {
2901 res = matroska_parse_rm_audio(matroska, track, st, data,
2907 } else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
2908 res = matroska_parse_webvtt(matroska, track, st,
2910 timecode, lace_duration,
2915 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2916 timecode, lace_duration, pos,
2917 !n ? is_keyframe : 0,
2918 additional, additional_id, additional_size,
2924 if (timecode != AV_NOPTS_VALUE)
2925 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
2926 data += lace_size[n];
2927 size -= lace_size[n];
2935 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2937 EbmlList *blocks_list;
2938 MatroskaBlock *blocks;
2940 res = ebml_parse(matroska,
2941 matroska_cluster_incremental_parsing,
2942 &matroska->current_cluster);
2945 if (matroska->current_cluster_pos)
2946 ebml_level_end(matroska);
2947 ebml_free(matroska_cluster, &matroska->current_cluster);
2948 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2949 matroska->current_cluster_num_blocks = 0;
2950 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2951 matroska->prev_pkt = NULL;
2952 /* sizeof the ID which was already read */
2953 if (matroska->current_id)
2954 matroska->current_cluster_pos -= 4;
2955 res = ebml_parse(matroska,
2956 matroska_clusters_incremental,
2957 &matroska->current_cluster);
2958 /* Try parsing the block again. */
2960 res = ebml_parse(matroska,
2961 matroska_cluster_incremental_parsing,
2962 &matroska->current_cluster);
2966 matroska->current_cluster_num_blocks <
2967 matroska->current_cluster.blocks.nb_elem) {
2968 blocks_list = &matroska->current_cluster.blocks;
2969 blocks = blocks_list->elem;
2971 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2972 i = blocks_list->nb_elem - 1;
2973 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2974 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2975 uint8_t* additional = blocks[i].additional.size > 0 ?
2976 blocks[i].additional.data : NULL;
2977 if (!blocks[i].non_simple)
2978 blocks[i].duration = 0;
2979 res = matroska_parse_block(matroska, blocks[i].bin.data,
2980 blocks[i].bin.size, blocks[i].bin.pos,
2981 matroska->current_cluster.timecode,
2982 blocks[i].duration, is_keyframe,
2983 additional, blocks[i].additional_id,
2984 blocks[i].additional.size,
2985 matroska->current_cluster_pos,
2986 blocks[i].discard_padding);
2993 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2995 MatroskaCluster cluster = { 0 };
2996 EbmlList *blocks_list;
2997 MatroskaBlock *blocks;
3001 if (!matroska->contains_ssa)
3002 return matroska_parse_cluster_incremental(matroska);
3003 pos = avio_tell(matroska->ctx->pb);
3004 matroska->prev_pkt = NULL;
3005 if (matroska->current_id)
3006 pos -= 4; /* sizeof the ID which was already read */
3007 res = ebml_parse(matroska, matroska_clusters, &cluster);
3008 blocks_list = &cluster.blocks;
3009 blocks = blocks_list->elem;
3010 for (i = 0; i < blocks_list->nb_elem; i++)
3011 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3012 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3013 res = matroska_parse_block(matroska, blocks[i].bin.data,
3014 blocks[i].bin.size, blocks[i].bin.pos,
3015 cluster.timecode, blocks[i].duration,
3016 is_keyframe, NULL, 0, 0, pos,
3017 blocks[i].discard_padding);
3019 ebml_free(matroska_cluster, &cluster);
3023 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3025 MatroskaDemuxContext *matroska = s->priv_data;
3027 while (matroska_deliver_packet(matroska, pkt)) {
3028 int64_t pos = avio_tell(matroska->ctx->pb);
3031 if (matroska_parse_cluster(matroska) < 0)
3032 matroska_resync(matroska, pos);
3038 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3039 int64_t timestamp, int flags)
3041 MatroskaDemuxContext *matroska = s->priv_data;
3042 MatroskaTrack *tracks = NULL;
3043 AVStream *st = s->streams[stream_index];
3044 int i, index, index_sub, index_min;
3046 /* Parse the CUES now since we need the index data to seek. */
3047 if (matroska->cues_parsing_deferred > 0) {
3048 matroska->cues_parsing_deferred = 0;
3049 matroska_parse_cues(matroska);
3052 if (!st->nb_index_entries)
3054 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3056 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3057 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3059 matroska->current_id = 0;
3060 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3061 matroska_clear_queue(matroska);
3062 if (matroska_parse_cluster(matroska) < 0)
3067 matroska_clear_queue(matroska);
3068 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3072 tracks = matroska->tracks.elem;
3073 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3074 tracks[i].audio.pkt_cnt = 0;
3075 tracks[i].audio.sub_packet_cnt = 0;
3076 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3077 tracks[i].end_timecode = 0;
3078 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3080 tracks[i].stream->discard != AVDISCARD_ALL) {
3081 index_sub = av_index_search_timestamp(
3082 tracks[i].stream, st->index_entries[index].timestamp,
3083 AVSEEK_FLAG_BACKWARD);
3084 while (index_sub >= 0 &&
3086 tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3087 st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3092 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3093 matroska->current_id = 0;
3094 if (flags & AVSEEK_FLAG_ANY) {
3095 st->skip_to_keyframe = 0;
3096 matroska->skip_to_timecode = timestamp;
3098 st->skip_to_keyframe = 1;
3099 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3101 matroska->skip_to_keyframe = 1;
3103 matroska->num_levels = 0;
3104 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3107 // slightly hackish but allows proper fallback to
3108 // the generic seeking code.
3109 matroska_clear_queue(matroska);
3110 matroska->current_id = 0;
3111 st->skip_to_keyframe =
3112 matroska->skip_to_keyframe = 0;
3114 matroska->num_levels = 0;
3118 static int matroska_read_close(AVFormatContext *s)
3120 MatroskaDemuxContext *matroska = s->priv_data;
3121 MatroskaTrack *tracks = matroska->tracks.elem;
3124 matroska_clear_queue(matroska);
3126 for (n = 0; n < matroska->tracks.nb_elem; n++)
3127 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3128 av_freep(&tracks[n].audio.buf);
3129 ebml_free(matroska_cluster, &matroska->current_cluster);
3130 ebml_free(matroska_segment, matroska);
3136 int64_t start_time_ns;
3137 int64_t end_time_ns;
3138 int64_t start_offset;
3142 /* This function searches all the Cues and returns the CueDesc corresponding the
3143 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3144 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3146 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3147 MatroskaDemuxContext *matroska = s->priv_data;
3150 int nb_index_entries = s->streams[0]->nb_index_entries;
3151 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3152 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3153 for (i = 1; i < nb_index_entries; i++) {
3154 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3155 index_entries[i].timestamp * matroska->time_scale > ts) {
3160 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3161 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3162 if (i != nb_index_entries - 1) {
3163 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3164 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3166 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3167 // FIXME: this needs special handling for files where Cues appear
3168 // before Clusters. the current logic assumes Cues appear after
3170 cue_desc.end_offset = cues_start - matroska->segment_start;
3175 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3177 MatroskaDemuxContext *matroska = s->priv_data;
3178 int64_t cluster_pos, before_pos;
3180 if (s->streams[0]->nb_index_entries <= 0) return 0;
3181 // seek to the first cluster using cues.
3182 index = av_index_search_timestamp(s->streams[0], 0, 0);
3183 if (index < 0) return 0;
3184 cluster_pos = s->streams[0]->index_entries[index].pos;
3185 before_pos = avio_tell(s->pb);
3187 int64_t cluster_id = 0, cluster_length = 0;
3189 avio_seek(s->pb, cluster_pos, SEEK_SET);
3190 // read cluster id and length
3191 ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3192 ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3193 if (cluster_id != 0xF43B675) { // done with all clusters
3196 avio_seek(s->pb, cluster_pos, SEEK_SET);
3197 matroska->current_id = 0;
3198 matroska_clear_queue(matroska);
3199 if (matroska_parse_cluster(matroska) < 0 ||
3200 matroska->num_packets <= 0) {
3203 pkt = matroska->packets[0];
3204 cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3205 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3210 avio_seek(s->pb, before_pos, SEEK_SET);
3214 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3215 double min_buffer, double* buffer,
3216 double* sec_to_download, AVFormatContext *s,
3219 double nano_seconds_per_second = 1000000000.0;
3220 double time_sec = time_ns / nano_seconds_per_second;
3222 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3223 int64_t end_time_ns = time_ns + time_to_search_ns;
3224 double sec_downloaded = 0.0;
3225 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3226 if (desc_curr.start_time_ns == -1)
3228 *sec_to_download = 0.0;
3230 // Check for non cue start time.
3231 if (time_ns > desc_curr.start_time_ns) {
3232 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3233 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3234 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3235 double timeToDownload = (cueBytes * 8.0) / bps;
3237 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3238 *sec_to_download += timeToDownload;
3240 // Check if the search ends within the first cue.
3241 if (desc_curr.end_time_ns >= end_time_ns) {
3242 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3243 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3244 sec_downloaded = percent_to_sub * sec_downloaded;
3245 *sec_to_download = percent_to_sub * *sec_to_download;
3248 if ((sec_downloaded + *buffer) <= min_buffer) {
3252 // Get the next Cue.
3253 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3256 while (desc_curr.start_time_ns != -1) {
3257 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3258 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3259 double desc_sec = desc_ns / nano_seconds_per_second;
3260 double bits = (desc_bytes * 8.0);
3261 double time_to_download = bits / bps;
3263 sec_downloaded += desc_sec - time_to_download;
3264 *sec_to_download += time_to_download;
3266 if (desc_curr.end_time_ns >= end_time_ns) {
3267 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3268 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3269 sec_downloaded = percent_to_sub * sec_downloaded;
3270 *sec_to_download = percent_to_sub * *sec_to_download;
3272 if ((sec_downloaded + *buffer) <= min_buffer)
3277 if ((sec_downloaded + *buffer) <= min_buffer) {
3282 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3284 *buffer = *buffer + sec_downloaded;
3288 /* This function computes the bandwidth of the WebM file with the help of
3289 * buffer_size_after_time_downloaded() function. Both of these functions are
3290 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3291 * Matroska parsing mechanism.
3293 * Returns the bandwidth of the file on success; -1 on error.
3295 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3297 MatroskaDemuxContext *matroska = s->priv_data;
3298 AVStream *st = s->streams[0];
3299 double bandwidth = 0.0;
3302 for (i = 0; i < st->nb_index_entries; i++) {
3303 int64_t prebuffer_ns = 1000000000;
3304 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3305 double nano_seconds_per_second = 1000000000.0;
3306 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3307 double prebuffer_bytes = 0.0;
3308 int64_t temp_prebuffer_ns = prebuffer_ns;
3309 int64_t pre_bytes, pre_ns;
3310 double pre_sec, prebuffer, bits_per_second;
3311 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3313 // Start with the first Cue.
3314 CueDesc desc_end = desc_beg;
3316 // Figure out how much data we have downloaded for the prebuffer. This will
3317 // be used later to adjust the bits per sample to try.
3318 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3319 // Prebuffered the entire Cue.
3320 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3321 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3322 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3324 if (desc_end.start_time_ns == -1) {
3325 // The prebuffer is larger than the duration.
3326 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3328 bits_per_second = 0.0;
3330 // The prebuffer ends in the last Cue. Estimate how much data was
3332 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3333 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3334 pre_sec = pre_ns / nano_seconds_per_second;
3336 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3338 prebuffer = prebuffer_ns / nano_seconds_per_second;
3340 // Set this to 0.0 in case our prebuffer buffers the entire video.
3341 bits_per_second = 0.0;
3343 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3344 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3345 double desc_sec = desc_ns / nano_seconds_per_second;
3346 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3348 // Drop the bps by the percentage of bytes buffered.
3349 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3350 double mod_bits_per_second = calc_bits_per_second * percent;
3352 if (prebuffer < desc_sec) {
3354 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3356 // Add 1 so the bits per second should be a little bit greater than file
3358 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3359 const double min_buffer = 0.0;
3360 double buffer = prebuffer;
3361 double sec_to_download = 0.0;
3363 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3364 min_buffer, &buffer, &sec_to_download,
3368 } else if (rv == 0) {
3369 bits_per_second = (double)(bps);
3374 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3375 } while (desc_end.start_time_ns != -1);
3377 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3379 return (int64_t)bandwidth;
3382 static int webm_dash_manifest_cues(AVFormatContext *s)
3384 MatroskaDemuxContext *matroska = s->priv_data;
3385 EbmlList *seekhead_list = &matroska->seekhead;
3386 MatroskaSeekhead *seekhead = seekhead_list->elem;
3388 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3391 // determine cues start and end positions
3392 for (i = 0; i < seekhead_list->nb_elem; i++)
3393 if (seekhead[i].id == MATROSKA_ID_CUES)
3396 if (i >= seekhead_list->nb_elem) return -1;
3398 before_pos = avio_tell(matroska->ctx->pb);
3399 cues_start = seekhead[i].pos + matroska->segment_start;
3400 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3401 // cues_end is computed as cues_start + cues_length + length of the
3402 // Cues element ID + EBML length of the Cues element. cues_end is
3403 // inclusive and the above sum is reduced by 1.
3404 uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3405 bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3406 bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3407 cues_end = cues_start + cues_length + bytes_read - 1;
3409 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3410 if (cues_start == -1 || cues_end == -1) return -1;
3413 matroska_parse_cues(matroska);
3416 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3419 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3422 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3423 if (bandwidth < 0) return -1;
3424 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3426 // check if all clusters start with key frames
3427 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3429 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3430 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3431 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3432 if (!buf) return -1;
3434 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3435 snprintf(buf, (i + 1) * 20 * sizeof(char),
3436 "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3437 if (i != s->streams[0]->nb_index_entries - 1)
3438 strncat(buf, ",", sizeof(char));
3440 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3446 static int webm_dash_manifest_read_header(AVFormatContext *s)
3449 int ret = matroska_read_header(s);
3450 MatroskaTrack *tracks;
3451 MatroskaDemuxContext *matroska = s->priv_data;
3453 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3457 if (!matroska->is_live) {
3458 buf = av_asprintf("%g", matroska->duration);
3459 if (!buf) return AVERROR(ENOMEM);
3460 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3463 // initialization range
3464 // 5 is the offset of Cluster ID.
3465 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, avio_tell(s->pb) - 5, 0);
3468 // basename of the file
3469 buf = strrchr(s->filename, '/');
3470 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3473 tracks = matroska->tracks.elem;
3474 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3476 // parse the cues and populate Cue related fields
3477 return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3480 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
3485 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3486 static const AVOption options[] = {
3487 { "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 },
3491 static const AVClass webm_dash_class = {
3492 .class_name = "WebM DASH Manifest demuxer",
3493 .item_name = av_default_item_name,
3495 .version = LIBAVUTIL_VERSION_INT,
3498 AVInputFormat ff_matroska_demuxer = {
3499 .name = "matroska,webm",
3500 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3501 .extensions = "mkv,mk3d,mka,mks",
3502 .priv_data_size = sizeof(MatroskaDemuxContext),
3503 .read_probe = matroska_probe,
3504 .read_header = matroska_read_header,
3505 .read_packet = matroska_read_packet,
3506 .read_close = matroska_read_close,
3507 .read_seek = matroska_read_seek,
3508 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3511 AVInputFormat ff_webm_dash_manifest_demuxer = {
3512 .name = "webm_dash_manifest",
3513 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3514 .priv_data_size = sizeof(MatroskaDemuxContext),
3515 .read_header = webm_dash_manifest_read_header,
3516 .read_packet = webm_dash_manifest_read_packet,
3517 .read_close = matroska_read_close,
3518 .priv_class = &webm_dash_class,