2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The Libav Project
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Matroska file demuxer
25 * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * @see specs available on the Matroska project page: http://www.matroska.org/
42 #include "libavutil/avstring.h"
43 #include "libavutil/dict.h"
44 #include "libavutil/intfloat.h"
45 #include "libavutil/intreadwrite.h"
46 #include "libavutil/lzo.h"
47 #include "libavutil/mathematics.h"
49 #include "libavcodec/bytestream.h"
50 #include "libavcodec/flac.h"
51 #include "libavcodec/mpeg4audio.h"
54 #include "avio_internal.h"
59 /* For ff_codec_get_id(). */
76 typedef const struct EbmlSyntax {
85 const struct EbmlSyntax *n;
89 typedef struct EbmlList {
94 typedef struct EbmlBin {
100 typedef struct Ebml {
105 uint64_t doctype_version;
108 typedef struct MatroskaTrackCompression {
111 } MatroskaTrackCompression;
113 typedef struct MatroskaTrackEncoding {
116 MatroskaTrackCompression compression;
117 } MatroskaTrackEncoding;
119 typedef struct MatroskaTrackVideo {
121 uint64_t display_width;
122 uint64_t display_height;
123 uint64_t pixel_width;
124 uint64_t pixel_height;
127 uint64_t field_order;
128 uint64_t stereo_mode;
129 } MatroskaTrackVideo;
131 typedef struct MatroskaTrackAudio {
133 double out_samplerate;
137 /* real audio header (extracted from extradata) */
144 uint64_t buf_timecode;
146 } MatroskaTrackAudio;
148 typedef struct MatroskaTrack {
157 uint64_t default_duration;
158 uint64_t flag_default;
159 uint64_t flag_forced;
160 MatroskaTrackVideo video;
161 MatroskaTrackAudio audio;
163 uint64_t codec_delay;
166 int64_t end_timecode;
170 typedef struct MatroskaAttachment {
177 } MatroskaAttachment;
179 typedef struct MatroskaChapter {
188 typedef struct MatroskaIndexPos {
193 typedef struct MatroskaIndex {
198 typedef struct MatroskaTag {
206 typedef struct MatroskaTagTarget {
214 typedef struct MatroskaTags {
215 MatroskaTagTarget target;
219 typedef struct MatroskaSeekhead {
224 typedef struct MatroskaLevel {
229 typedef struct MatroskaCluster {
234 typedef struct MatroskaDemuxContext {
235 AVFormatContext *ctx;
239 MatroskaLevel levels[EBML_MAX_DEPTH];
247 EbmlList attachments;
253 /* byte position of the segment inside the stream */
254 int64_t segment_start;
256 /* the packet queue */
263 /* What to skip before effectively reading a packet. */
264 int skip_to_keyframe;
265 uint64_t skip_to_timecode;
267 /* File has a CUES element, but we defer parsing until it is needed. */
268 int cues_parsing_deferred;
270 int current_cluster_num_blocks;
271 int64_t current_cluster_pos;
272 MatroskaCluster current_cluster;
274 /* File has SSA subtitles which prevent incremental cluster parsing. */
276 } MatroskaDemuxContext;
278 typedef struct MatroskaBlock {
285 static EbmlSyntax ebml_header[] = {
286 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
287 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
288 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
289 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
290 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
291 { EBML_ID_EBMLVERSION, EBML_NONE },
292 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
296 static EbmlSyntax ebml_syntax[] = {
297 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
301 static EbmlSyntax matroska_info[] = {
302 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
303 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
304 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
305 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
306 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
307 { MATROSKA_ID_DATEUTC, EBML_NONE },
308 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
312 static EbmlSyntax matroska_track_video[] = {
313 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
314 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width) },
315 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height) },
316 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
317 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
318 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, fourcc) },
319 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
320 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
321 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
322 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
323 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
324 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
325 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
326 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
327 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
331 static EbmlSyntax matroska_track_audio[] = {
332 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
333 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
334 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
335 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
339 static EbmlSyntax matroska_track_encoding_compression[] = {
340 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
341 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
345 static EbmlSyntax matroska_track_encoding[] = {
346 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
347 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
348 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
349 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
353 static EbmlSyntax matroska_track_encodings[] = {
354 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
358 static EbmlSyntax matroska_track[] = {
359 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
360 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
361 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
362 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
363 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
364 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
365 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
366 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
367 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
368 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
369 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
370 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
371 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
372 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
373 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
374 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
375 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
376 { MATROSKA_ID_CODECNAME, EBML_NONE },
377 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
378 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
379 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
380 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
381 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
382 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
386 static EbmlSyntax matroska_tracks[] = {
387 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
391 static EbmlSyntax matroska_attachment[] = {
392 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
393 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
394 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
395 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
396 { MATROSKA_ID_FILEDESC, EBML_NONE },
400 static EbmlSyntax matroska_attachments[] = {
401 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
405 static EbmlSyntax matroska_chapter_display[] = {
406 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
407 { MATROSKA_ID_CHAPLANG, EBML_NONE },
411 static EbmlSyntax matroska_chapter_entry[] = {
412 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
413 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
414 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
415 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
416 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
417 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
418 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
419 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
423 static EbmlSyntax matroska_chapter[] = {
424 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
425 { MATROSKA_ID_EDITIONUID, EBML_NONE },
426 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
427 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
428 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
432 static EbmlSyntax matroska_chapters[] = {
433 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
437 static EbmlSyntax matroska_index_pos[] = {
438 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
439 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
440 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
444 static EbmlSyntax matroska_index_entry[] = {
445 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
446 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
450 static EbmlSyntax matroska_index[] = {
451 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
455 static EbmlSyntax matroska_simpletag[] = {
456 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
457 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
458 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
459 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
460 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
461 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
465 static EbmlSyntax matroska_tagtargets[] = {
466 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
467 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
468 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
469 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
470 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
474 static EbmlSyntax matroska_tag[] = {
475 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
476 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
480 static EbmlSyntax matroska_tags[] = {
481 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
485 static EbmlSyntax matroska_seekhead_entry[] = {
486 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
487 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
491 static EbmlSyntax matroska_seekhead[] = {
492 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
496 static EbmlSyntax matroska_segment[] = {
497 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, { .n = matroska_info } },
498 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, { .n = matroska_tracks } },
499 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, { .n = matroska_attachments } },
500 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, { .n = matroska_chapters } },
501 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, { .n = matroska_index } },
502 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, { .n = matroska_tags } },
503 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, { .n = matroska_seekhead } },
504 { MATROSKA_ID_CLUSTER, EBML_STOP },
508 static EbmlSyntax matroska_segments[] = {
509 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
513 static EbmlSyntax matroska_blockgroup[] = {
514 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
515 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
516 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration), { .u = AV_NOPTS_VALUE } },
517 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock, reference) },
518 { MATROSKA_ID_CODECSTATE, EBML_NONE },
519 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
523 static EbmlSyntax matroska_cluster[] = {
524 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
525 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
526 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
527 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
528 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
532 static EbmlSyntax matroska_clusters[] = {
533 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
534 { MATROSKA_ID_INFO, EBML_NONE },
535 { MATROSKA_ID_CUES, EBML_NONE },
536 { MATROSKA_ID_TAGS, EBML_NONE },
537 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
541 static EbmlSyntax matroska_cluster_incremental_parsing[] = {
542 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
543 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
544 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
545 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
546 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
547 { MATROSKA_ID_INFO, EBML_NONE },
548 { MATROSKA_ID_CUES, EBML_NONE },
549 { MATROSKA_ID_TAGS, EBML_NONE },
550 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
551 { MATROSKA_ID_CLUSTER, EBML_STOP },
555 static EbmlSyntax matroska_cluster_incremental[] = {
556 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
557 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
558 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
559 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
560 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
564 static EbmlSyntax matroska_clusters_incremental[] = {
565 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
566 { MATROSKA_ID_INFO, EBML_NONE },
567 { MATROSKA_ID_CUES, EBML_NONE },
568 { MATROSKA_ID_TAGS, EBML_NONE },
569 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
573 static const char *const matroska_doctypes[] = { "matroska", "webm" };
575 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
577 AVIOContext *pb = matroska->ctx->pb;
579 matroska->current_id = 0;
580 matroska->num_levels = 0;
582 /* seek to next position to resync from */
583 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
588 // try to find a toplevel element
589 while (!pb->eof_reached) {
590 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
591 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
592 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
593 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
594 matroska->current_id = id;
597 id = (id << 8) | avio_r8(pb);
606 * Return: Whether we reached the end of a level in the hierarchy or not.
608 static int ebml_level_end(MatroskaDemuxContext *matroska)
610 AVIOContext *pb = matroska->ctx->pb;
611 int64_t pos = avio_tell(pb);
613 if (matroska->num_levels > 0) {
614 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
615 if (pos - level->start >= level->length || matroska->current_id) {
616 matroska->num_levels--;
624 * Read: an "EBML number", which is defined as a variable-length
625 * array of bytes. The first byte indicates the length by giving a
626 * number of 0-bits followed by a one. The position of the first
627 * "one" bit inside the first byte indicates the length of this
629 * Returns: number of bytes read, < 0 on error
631 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
632 int max_size, uint64_t *number)
637 /* The first byte tells us the length in bytes - avio_r8() can normally
638 * return 0, but since that's not a valid first ebmlID byte, we can
639 * use it safely here to catch EOS. */
640 if (!(total = avio_r8(pb))) {
641 /* we might encounter EOS here */
642 if (!pb->eof_reached) {
643 int64_t pos = avio_tell(pb);
644 av_log(matroska->ctx, AV_LOG_ERROR,
645 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
647 return pb->error ? pb->error : AVERROR(EIO);
652 /* get the length of the EBML number */
653 read = 8 - ff_log2_tab[total];
654 if (read > max_size) {
655 int64_t pos = avio_tell(pb) - 1;
656 av_log(matroska->ctx, AV_LOG_ERROR,
657 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
658 (uint8_t) total, pos, pos);
659 return AVERROR_INVALIDDATA;
662 /* read out length */
663 total ^= 1 << ff_log2_tab[total];
665 total = (total << 8) | avio_r8(pb);
673 * Read a EBML length value.
674 * This needs special handling for the "unknown length" case which has multiple
677 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
680 int res = ebml_read_num(matroska, pb, 8, number);
681 if (res > 0 && *number + 1 == 1ULL << (7 * res))
682 *number = 0xffffffffffffffULL;
687 * Read the next element as an unsigned int.
688 * 0 is success, < 0 is failure.
690 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
695 return AVERROR_INVALIDDATA;
697 /* big-endian ordering; build up number */
700 *num = (*num << 8) | avio_r8(pb);
706 * Read the next element as a float.
707 * 0 is success, < 0 is failure.
709 static int ebml_read_float(AVIOContext *pb, int size, double *num)
714 *num = av_int2float(avio_rb32(pb));
716 *num = av_int2double(avio_rb64(pb));
718 return AVERROR_INVALIDDATA;
724 * Read the next element as an ASCII string.
725 * 0 is success, < 0 is failure.
727 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
731 /* EBML strings are usually not 0-terminated, so we allocate one
732 * byte more, read the string and NULL-terminate it ourselves. */
733 if (!(res = av_malloc(size + 1)))
734 return AVERROR(ENOMEM);
735 if (avio_read(pb, (uint8_t *) res, size) != size) {
747 * Read the next element as binary data.
748 * 0 is success, < 0 is failure.
750 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
753 if (!(bin->data = av_mallocz(length + AV_INPUT_BUFFER_PADDING_SIZE)))
754 return AVERROR(ENOMEM);
757 bin->pos = avio_tell(pb);
758 if (avio_read(pb, bin->data, length) != length) {
759 av_freep(&bin->data);
767 * Read the next element, but only the header. The contents
768 * are supposed to be sub-elements which can be read separately.
769 * 0 is success, < 0 is failure.
771 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
773 AVIOContext *pb = matroska->ctx->pb;
774 MatroskaLevel *level;
776 if (matroska->num_levels >= EBML_MAX_DEPTH) {
777 av_log(matroska->ctx, AV_LOG_ERROR,
778 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
779 return AVERROR(ENOSYS);
782 level = &matroska->levels[matroska->num_levels++];
783 level->start = avio_tell(pb);
784 level->length = length;
790 * Read signed/unsigned "EBML" numbers.
791 * Return: number of bytes processed, < 0 on error
793 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
794 uint8_t *data, uint32_t size, uint64_t *num)
797 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
798 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
802 * Same as above, but signed.
804 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
805 uint8_t *data, uint32_t size, int64_t *num)
810 /* read as unsigned number first */
811 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
814 /* make signed (weird way) */
815 *num = unum - ((1LL << (7 * res - 1)) - 1);
820 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
821 EbmlSyntax *syntax, void *data);
823 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
824 uint32_t id, void *data)
827 for (i = 0; syntax[i].id; i++)
828 if (id == syntax[i].id)
830 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
831 matroska->num_levels > 0 &&
832 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
833 return 0; // we reached the end of an unknown size cluster
834 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
835 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%"PRIX32"\n", id);
836 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
837 return AVERROR_INVALIDDATA;
839 return ebml_parse_elem(matroska, &syntax[i], data);
842 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
845 if (!matroska->current_id) {
847 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
850 matroska->current_id = id | 1 << 7 * res;
852 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
855 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
860 for (i = 0; syntax[i].id; i++)
861 switch (syntax[i].type) {
863 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
866 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
870 // the default may be NULL
871 if (syntax[i].def.s) {
872 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
873 *dst = av_strdup(syntax[i].def.s);
875 return AVERROR(ENOMEM);
880 while (!res && !ebml_level_end(matroska))
881 res = ebml_parse(matroska, syntax, data);
886 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
887 EbmlSyntax *syntax, void *data)
889 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
892 // max. 16 MB for strings
893 [EBML_STR] = 0x1000000,
894 [EBML_UTF8] = 0x1000000,
895 // max. 256 MB for binary data
896 [EBML_BIN] = 0x10000000,
897 // no limits for anything else
899 AVIOContext *pb = matroska->ctx->pb;
900 uint32_t id = syntax->id;
904 data = (char *) data + syntax->data_offset;
905 if (syntax->list_elem_size) {
906 EbmlList *list = data;
907 if ((res = av_reallocp_array(&list->elem,
909 syntax->list_elem_size)) < 0) {
913 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
914 memset(data, 0, syntax->list_elem_size);
918 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
919 matroska->current_id = 0;
920 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
922 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
923 av_log(matroska->ctx, AV_LOG_ERROR,
924 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
925 length, max_lengths[syntax->type], syntax->type);
926 return AVERROR_INVALIDDATA;
930 switch (syntax->type) {
932 res = ebml_read_uint(pb, length, data);
935 res = ebml_read_float(pb, length, data);
939 res = ebml_read_ascii(pb, length, data);
942 res = ebml_read_binary(pb, length, data);
945 if ((res = ebml_read_master(matroska, length)) < 0)
947 if (id == MATROSKA_ID_SEGMENT)
948 matroska->segment_start = avio_tell(matroska->ctx->pb);
949 return ebml_parse_nest(matroska, syntax->def.n, data);
951 return ebml_parse_id(matroska, syntax->def.n, id, data);
955 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
957 if (res == AVERROR_INVALIDDATA)
958 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
959 else if (res == AVERROR(EIO))
960 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
964 static void ebml_free(EbmlSyntax *syntax, void *data)
967 for (i = 0; syntax[i].id; i++) {
968 void *data_off = (char *) data + syntax[i].data_offset;
969 switch (syntax[i].type) {
975 av_freep(&((EbmlBin *) data_off)->data);
978 if (syntax[i].list_elem_size) {
979 EbmlList *list = data_off;
980 char *ptr = list->elem;
981 for (j = 0; j < list->nb_elem;
982 j++, ptr += syntax[i].list_elem_size)
983 ebml_free(syntax[i].def.n, ptr);
986 ebml_free(syntax[i].def.n, data_off);
996 static int matroska_probe(AVProbeData *p)
999 int len_mask = 0x80, size = 1, n = 1, i;
1002 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1005 /* length of header */
1007 while (size <= 8 && !(total & len_mask)) {
1013 total &= (len_mask - 1);
1015 total = (total << 8) | p->buf[4 + n++];
1017 /* Does the probe data contain the whole header? */
1018 if (p->buf_size < 4 + size + total)
1021 /* The header should contain a known document type. For now,
1022 * we don't parse the whole header but simply check for the
1023 * availability of that array of characters inside the header.
1024 * Not fully fool-proof, but good enough. */
1025 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1026 int probelen = strlen(matroska_doctypes[i]);
1027 if (total < probelen)
1029 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1030 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1031 return AVPROBE_SCORE_MAX;
1034 // probably valid EBML header but no recognized doctype
1035 return AVPROBE_SCORE_EXTENSION;
1038 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1041 MatroskaTrack *tracks = matroska->tracks.elem;
1044 for (i = 0; i < matroska->tracks.nb_elem; i++)
1045 if (tracks[i].num == num)
1048 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1052 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1053 MatroskaTrack *track)
1055 MatroskaTrackEncoding *encodings = track->encodings.elem;
1056 uint8_t *data = *buf;
1057 int isize = *buf_size;
1058 uint8_t *pkt_data = NULL;
1059 uint8_t av_unused *newpktdata;
1060 int pkt_size = isize;
1064 if (pkt_size >= 10000000)
1065 return AVERROR_INVALIDDATA;
1067 switch (encodings[0].compression.algo) {
1068 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1070 int header_size = encodings[0].compression.settings.size;
1071 uint8_t *header = encodings[0].compression.settings.data;
1076 pkt_size = isize + header_size;
1077 pkt_data = av_malloc(pkt_size);
1079 return AVERROR(ENOMEM);
1081 memcpy(pkt_data, header, header_size);
1082 memcpy(pkt_data + header_size, data, isize);
1086 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1088 olen = pkt_size *= 3;
1089 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1091 result = AVERROR(ENOMEM);
1094 pkt_data = newpktdata;
1095 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1096 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1098 result = AVERROR_INVALIDDATA;
1105 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1107 z_stream zstream = { 0 };
1108 if (inflateInit(&zstream) != Z_OK)
1110 zstream.next_in = data;
1111 zstream.avail_in = isize;
1114 newpktdata = av_realloc(pkt_data, pkt_size);
1116 inflateEnd(&zstream);
1119 pkt_data = newpktdata;
1120 zstream.avail_out = pkt_size - zstream.total_out;
1121 zstream.next_out = pkt_data + zstream.total_out;
1122 result = inflate(&zstream, Z_NO_FLUSH);
1123 } while (result == Z_OK && pkt_size < 10000000);
1124 pkt_size = zstream.total_out;
1125 inflateEnd(&zstream);
1126 if (result != Z_STREAM_END) {
1127 if (result == Z_MEM_ERROR)
1128 result = AVERROR(ENOMEM);
1130 result = AVERROR_INVALIDDATA;
1137 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1139 bz_stream bzstream = { 0 };
1140 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1142 bzstream.next_in = data;
1143 bzstream.avail_in = isize;
1146 newpktdata = av_realloc(pkt_data, pkt_size);
1148 BZ2_bzDecompressEnd(&bzstream);
1151 pkt_data = newpktdata;
1152 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1153 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1154 result = BZ2_bzDecompress(&bzstream);
1155 } while (result == BZ_OK && pkt_size < 10000000);
1156 pkt_size = bzstream.total_out_lo32;
1157 BZ2_bzDecompressEnd(&bzstream);
1158 if (result != BZ_STREAM_END) {
1159 if (result == BZ_MEM_ERROR)
1160 result = AVERROR(ENOMEM);
1162 result = AVERROR_INVALIDDATA;
1169 return AVERROR_INVALIDDATA;
1173 *buf_size = pkt_size;
1181 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1182 AVPacket *pkt, uint64_t display_duration)
1185 char *layer, *ptr = pkt->data, *end = ptr + pkt->size;
1187 for (; *ptr != ',' && ptr < end - 1; ptr++)
1191 for (; *ptr != ',' && ptr < end - 1; ptr++)
1194 int64_t end_pts = pkt->pts + display_duration;
1195 int sc = matroska->time_scale * pkt->pts / 10000000;
1196 int ec = matroska->time_scale * end_pts / 10000000;
1197 int sh, sm, ss, eh, em, es, len;
1211 len = 50 + end - ptr + AV_INPUT_BUFFER_PADDING_SIZE;
1212 if (!(line = av_buffer_alloc(len)))
1214 snprintf(line->data, len,
1215 "Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1216 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1217 av_buffer_unref(&pkt->buf);
1219 pkt->data = line->data;
1220 pkt->size = strlen(line->data);
1224 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1226 int old_size = out->size;
1227 int ret = av_grow_packet(out, in->size);
1231 memcpy(out->data + old_size, in->data, in->size);
1233 av_packet_unref(in);
1238 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1239 AVDictionary **metadata, char *prefix)
1241 MatroskaTag *tags = list->elem;
1245 for (i = 0; i < list->nb_elem; i++) {
1246 const char *lang = tags[i].lang &&
1247 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1249 if (!tags[i].name) {
1250 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1254 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1256 av_strlcpy(key, tags[i].name, sizeof(key));
1257 if (tags[i].def || !lang) {
1258 av_dict_set(metadata, key, tags[i].string, 0);
1259 if (tags[i].sub.nb_elem)
1260 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1263 av_strlcat(key, "-", sizeof(key));
1264 av_strlcat(key, lang, sizeof(key));
1265 av_dict_set(metadata, key, tags[i].string, 0);
1266 if (tags[i].sub.nb_elem)
1267 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1270 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1273 static void matroska_convert_tags(AVFormatContext *s)
1275 MatroskaDemuxContext *matroska = s->priv_data;
1276 MatroskaTags *tags = matroska->tags.elem;
1279 for (i = 0; i < matroska->tags.nb_elem; i++) {
1280 if (tags[i].target.attachuid) {
1281 MatroskaAttachment *attachment = matroska->attachments.elem;
1283 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1284 if (attachment[j].uid == tags[i].target.attachuid &&
1285 attachment[j].stream) {
1286 matroska_convert_tag(s, &tags[i].tag,
1287 &attachment[j].stream->metadata, NULL);
1292 av_log(NULL, AV_LOG_WARNING,
1293 "The tags at index %d refer to a "
1294 "non-existent attachment %"PRId64".\n",
1295 i, tags[i].target.attachuid);
1297 } else if (tags[i].target.chapteruid) {
1298 MatroskaChapter *chapter = matroska->chapters.elem;
1300 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1301 if (chapter[j].uid == tags[i].target.chapteruid &&
1302 chapter[j].chapter) {
1303 matroska_convert_tag(s, &tags[i].tag,
1304 &chapter[j].chapter->metadata, NULL);
1309 av_log(NULL, AV_LOG_WARNING,
1310 "The tags at index %d refer to a non-existent chapter "
1312 i, tags[i].target.chapteruid);
1314 } else if (tags[i].target.trackuid) {
1315 MatroskaTrack *track = matroska->tracks.elem;
1317 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1318 if (track[j].uid == tags[i].target.trackuid &&
1320 matroska_convert_tag(s, &tags[i].tag,
1321 &track[j].stream->metadata, NULL);
1326 av_log(NULL, AV_LOG_WARNING,
1327 "The tags at index %d refer to a non-existent track "
1329 i, tags[i].target.trackuid);
1332 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1333 tags[i].target.type);
1338 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1341 EbmlList *seekhead_list = &matroska->seekhead;
1342 uint32_t level_up = matroska->level_up;
1343 uint32_t saved_id = matroska->current_id;
1344 MatroskaSeekhead *seekhead = seekhead_list->elem;
1345 int64_t before_pos = avio_tell(matroska->ctx->pb);
1346 MatroskaLevel level;
1350 if (idx >= seekhead_list->nb_elem ||
1351 seekhead[idx].id == MATROSKA_ID_SEEKHEAD ||
1352 seekhead[idx].id == MATROSKA_ID_CLUSTER)
1356 offset = seekhead[idx].pos + matroska->segment_start;
1357 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1358 /* We don't want to lose our seekhead level, so we add
1359 * a dummy. This is a crude hack. */
1360 if (matroska->num_levels == EBML_MAX_DEPTH) {
1361 av_log(matroska->ctx, AV_LOG_INFO,
1362 "Max EBML element depth (%d) reached, "
1363 "cannot parse further.\n", EBML_MAX_DEPTH);
1364 ret = AVERROR_INVALIDDATA;
1367 level.length = (uint64_t) -1;
1368 matroska->levels[matroska->num_levels] = level;
1369 matroska->num_levels++;
1370 matroska->current_id = 0;
1372 ret = ebml_parse(matroska, matroska_segment, matroska);
1374 /* remove dummy level */
1375 while (matroska->num_levels) {
1376 uint64_t length = matroska->levels[--matroska->num_levels].length;
1377 if (length == (uint64_t) -1)
1383 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1384 matroska->level_up = level_up;
1385 matroska->current_id = saved_id;
1390 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1392 EbmlList *seekhead_list = &matroska->seekhead;
1393 int64_t before_pos = avio_tell(matroska->ctx->pb);
1396 // we should not do any seeking in the streaming case
1397 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL) ||
1398 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1401 for (i = 0; i < seekhead_list->nb_elem; i++) {
1402 MatroskaSeekhead *seekhead = seekhead_list->elem;
1403 if (seekhead[i].pos <= before_pos)
1406 // defer cues parsing until we actually need cue data.
1407 if (seekhead[i].id == MATROSKA_ID_CUES) {
1408 matroska->cues_parsing_deferred = 1;
1412 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1417 static void matroska_parse_cues(MatroskaDemuxContext *matroska)
1419 EbmlList *seekhead_list = &matroska->seekhead;
1420 MatroskaSeekhead *seekhead = seekhead_list->elem;
1421 EbmlList *index_list;
1422 MatroskaIndex *index;
1423 int index_scale = 1;
1426 for (i = 0; i < seekhead_list->nb_elem; i++)
1427 if (seekhead[i].id == MATROSKA_ID_CUES)
1429 assert(i <= seekhead_list->nb_elem);
1431 matroska_parse_seekhead_entry(matroska, i);
1433 index_list = &matroska->index;
1434 index = index_list->elem;
1435 if (index_list->nb_elem &&
1436 index[0].time > 1E14 / matroska->time_scale) {
1437 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1438 index_scale = matroska->time_scale;
1440 for (i = 0; i < index_list->nb_elem; i++) {
1441 EbmlList *pos_list = &index[i].pos;
1442 MatroskaIndexPos *pos = pos_list->elem;
1443 for (j = 0; j < pos_list->nb_elem; j++) {
1444 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1446 if (track && track->stream)
1447 av_add_index_entry(track->stream,
1448 pos[j].pos + matroska->segment_start,
1449 index[i].time / index_scale, 0, 0,
1455 static int matroska_aac_profile(char *codec_id)
1457 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1460 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1461 if (strstr(codec_id, aac_profiles[profile]))
1466 static int matroska_aac_sri(int samplerate)
1470 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1471 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1476 static int matroska_parse_flac(AVFormatContext *s,
1477 MatroskaTrack *track,
1480 AVStream *st = track->stream;
1481 uint8_t *p = track->codec_priv.data;
1482 int size = track->codec_priv.size;
1484 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1485 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1486 track->codec_priv.size = 0;
1490 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1492 p += track->codec_priv.size;
1493 size -= track->codec_priv.size;
1495 /* parse the remaining metadata blocks if present */
1497 int block_last, block_type, block_size;
1499 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1503 if (block_size > size)
1506 /* check for the channel mask */
1507 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1508 AVDictionary *dict = NULL;
1509 AVDictionaryEntry *chmask;
1511 ff_vorbis_comment(s, &dict, p, block_size, 0);
1512 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1514 uint64_t mask = strtol(chmask->value, NULL, 0);
1515 if (!mask || mask & ~0x3ffffULL) {
1516 av_log(s, AV_LOG_WARNING,
1517 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1519 st->codecpar->channel_layout = mask;
1521 av_dict_free(&dict);
1531 static int mkv_field_order(int64_t field_order)
1533 switch (field_order) {
1534 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1535 return AV_FIELD_PROGRESSIVE;
1536 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1537 return AV_FIELD_UNKNOWN;
1538 case MATROSKA_VIDEO_FIELDORDER_TT:
1540 case MATROSKA_VIDEO_FIELDORDER_BB:
1542 case MATROSKA_VIDEO_FIELDORDER_BT:
1544 case MATROSKA_VIDEO_FIELDORDER_TB:
1547 return AV_FIELD_UNKNOWN;
1551 static void mkv_stereo_mode_display_mul(int stereo_mode,
1552 int *h_width, int *h_height)
1554 switch (stereo_mode) {
1555 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1556 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1557 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1558 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1559 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1561 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1562 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1563 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1564 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1567 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1568 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1569 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1570 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1576 static int matroska_parse_tracks(AVFormatContext *s)
1578 MatroskaDemuxContext *matroska = s->priv_data;
1579 MatroskaTrack *tracks = matroska->tracks.elem;
1583 for (i = 0; i < matroska->tracks.nb_elem; i++) {
1584 MatroskaTrack *track = &tracks[i];
1585 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1586 EbmlList *encodings_list = &track->encodings;
1587 MatroskaTrackEncoding *encodings = encodings_list->elem;
1588 uint8_t *extradata = NULL;
1589 int extradata_size = 0;
1590 int extradata_offset = 0;
1593 /* Apply some sanity checks. */
1594 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1595 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1596 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1597 av_log(matroska->ctx, AV_LOG_INFO,
1598 "Unknown or unsupported track type %"PRIu64"\n",
1602 if (!track->codec_id)
1605 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1606 if (!track->default_duration && track->video.frame_rate > 0)
1607 track->default_duration = 1000000000 / track->video.frame_rate;
1608 if (!track->video.display_width)
1609 track->video.display_width = track->video.pixel_width;
1610 if (!track->video.display_height)
1611 track->video.display_height = track->video.pixel_height;
1612 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1613 if (!track->audio.out_samplerate)
1614 track->audio.out_samplerate = track->audio.samplerate;
1616 if (encodings_list->nb_elem > 1) {
1617 av_log(matroska->ctx, AV_LOG_ERROR,
1618 "Multiple combined encodings not supported");
1619 } else if (encodings_list->nb_elem == 1) {
1620 if (encodings[0].type ||
1623 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1626 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1629 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1631 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP)) {
1632 encodings[0].scope = 0;
1633 av_log(matroska->ctx, AV_LOG_ERROR,
1634 "Unsupported encoding type");
1635 } else if (track->codec_priv.size && encodings[0].scope & 2) {
1636 uint8_t *codec_priv = track->codec_priv.data;
1637 int ret = matroska_decode_buffer(&track->codec_priv.data,
1638 &track->codec_priv.size,
1641 track->codec_priv.data = NULL;
1642 track->codec_priv.size = 0;
1643 av_log(matroska->ctx, AV_LOG_ERROR,
1644 "Failed to decode codec private data\n");
1647 if (codec_priv != track->codec_priv.data)
1648 av_free(codec_priv);
1652 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1653 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1654 strlen(ff_mkv_codec_tags[j].str))) {
1655 codec_id = ff_mkv_codec_tags[j].id;
1660 st = track->stream = avformat_new_stream(s, NULL);
1662 return AVERROR(ENOMEM);
1664 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1665 track->codec_priv.size >= 40 &&
1666 track->codec_priv.data) {
1667 track->ms_compat = 1;
1668 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1669 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
1670 track->video.fourcc);
1671 extradata_offset = 40;
1672 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1673 track->codec_priv.size >= 14 &&
1674 track->codec_priv.data) {
1676 ffio_init_context(&b, track->codec_priv.data,
1677 track->codec_priv.size,
1678 0, NULL, NULL, NULL, NULL);
1679 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size);
1682 codec_id = st->codecpar->codec_id;
1683 extradata_offset = FFMIN(track->codec_priv.size, 18);
1684 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1685 (track->codec_priv.size >= 86) &&
1686 (track->codec_priv.data)) {
1687 if (track->codec_priv.size == AV_RB32(track->codec_priv.data)) {
1688 track->video.fourcc = AV_RL32(track->codec_priv.data + 4);
1689 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
1690 track->video.fourcc);
1692 if (codec_id == AV_CODEC_ID_NONE) {
1693 track->video.fourcc = AV_RL32(track->codec_priv.data);
1694 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
1695 track->video.fourcc);
1697 if (codec_id == AV_CODEC_ID_NONE) {
1699 av_get_codec_tag_string(buf, sizeof(buf), track->video.fourcc);
1700 av_log(matroska->ctx, AV_LOG_ERROR,
1701 "mov FourCC not found %s.\n", buf);
1703 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1704 switch (track->audio.bitdepth) {
1706 codec_id = AV_CODEC_ID_PCM_U8;
1709 codec_id = AV_CODEC_ID_PCM_S24BE;
1712 codec_id = AV_CODEC_ID_PCM_S32BE;
1715 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1716 switch (track->audio.bitdepth) {
1718 codec_id = AV_CODEC_ID_PCM_U8;
1721 codec_id = AV_CODEC_ID_PCM_S24LE;
1724 codec_id = AV_CODEC_ID_PCM_S32LE;
1727 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1728 track->audio.bitdepth == 64) {
1729 codec_id = AV_CODEC_ID_PCM_F64LE;
1730 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1731 int profile = matroska_aac_profile(track->codec_id);
1732 int sri = matroska_aac_sri(track->audio.samplerate);
1733 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
1735 return AVERROR(ENOMEM);
1736 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1737 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1738 if (strstr(track->codec_id, "SBR")) {
1739 sri = matroska_aac_sri(track->audio.out_samplerate);
1740 extradata[2] = 0x56;
1741 extradata[3] = 0xE5;
1742 extradata[4] = 0x80 | (sri << 3);
1746 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1747 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1748 * Create the "atom size", "tag", and "tag version" fields the
1749 * decoder expects manually. */
1750 extradata_size = 12 + track->codec_priv.size;
1751 extradata = av_mallocz(extradata_size +
1752 AV_INPUT_BUFFER_PADDING_SIZE);
1754 return AVERROR(ENOMEM);
1755 AV_WB32(extradata, extradata_size);
1756 memcpy(&extradata[4], "alac", 4);
1757 AV_WB32(&extradata[8], 0);
1758 memcpy(&extradata[12], track->codec_priv.data,
1759 track->codec_priv.size);
1760 } else if (codec_id == AV_CODEC_ID_TTA) {
1761 extradata_size = 30;
1762 extradata = av_mallocz(extradata_size);
1764 return AVERROR(ENOMEM);
1765 ffio_init_context(&b, extradata, extradata_size, 1,
1766 NULL, NULL, NULL, NULL);
1767 avio_write(&b, "TTA1", 4);
1769 avio_wl16(&b, track->audio.channels);
1770 avio_wl16(&b, track->audio.bitdepth);
1771 avio_wl32(&b, track->audio.out_samplerate);
1772 avio_wl32(&b, matroska->ctx->duration *
1773 track->audio.out_samplerate);
1774 } else if (codec_id == AV_CODEC_ID_RV10 ||
1775 codec_id == AV_CODEC_ID_RV20 ||
1776 codec_id == AV_CODEC_ID_RV30 ||
1777 codec_id == AV_CODEC_ID_RV40) {
1778 extradata_offset = 26;
1779 } else if (codec_id == AV_CODEC_ID_RA_144) {
1780 track->audio.out_samplerate = 8000;
1781 track->audio.channels = 1;
1782 } else if (codec_id == AV_CODEC_ID_RA_288 ||
1783 codec_id == AV_CODEC_ID_COOK ||
1784 codec_id == AV_CODEC_ID_ATRAC3 ||
1785 codec_id == AV_CODEC_ID_SIPR) {
1787 ffio_init_context(&b, track->codec_priv.data,
1788 track->codec_priv.size,
1789 0, NULL, NULL, NULL, NULL);
1791 flavor = avio_rb16(&b);
1792 track->audio.coded_framesize = avio_rb32(&b);
1794 track->audio.sub_packet_h = avio_rb16(&b);
1795 track->audio.frame_size = avio_rb16(&b);
1796 track->audio.sub_packet_size = avio_rb16(&b);
1798 track->audio.coded_framesize <= 0 ||
1799 track->audio.sub_packet_h <= 0 ||
1800 track->audio.frame_size <= 0 ||
1801 track->audio.sub_packet_size <= 0)
1802 return AVERROR_INVALIDDATA;
1803 track->audio.buf = av_malloc(track->audio.frame_size *
1804 track->audio.sub_packet_h);
1805 if (!track->audio.buf)
1806 return AVERROR(ENOMEM);
1807 if (codec_id == AV_CODEC_ID_RA_288) {
1808 st->codecpar->block_align = track->audio.coded_framesize;
1809 track->codec_priv.size = 0;
1811 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1812 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1813 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1814 st->codecpar->bit_rate = sipr_bit_rate[flavor];
1816 st->codecpar->block_align = track->audio.sub_packet_size;
1817 extradata_offset = 78;
1819 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1820 ret = matroska_parse_flac(s, track, &extradata_offset);
1824 track->codec_priv.size -= extradata_offset;
1826 if (codec_id == AV_CODEC_ID_NONE)
1827 av_log(matroska->ctx, AV_LOG_INFO,
1828 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1830 if (track->time_scale < 0.01)
1831 track->time_scale = 1.0;
1832 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1833 1000 * 1000 * 1000); /* 64 bit pts in ns */
1835 if (track->type == MATROSKA_TRACK_TYPE_AUDIO &&
1836 track->audio.out_samplerate) {
1837 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
1838 (AVRational){ 1, 1000000000 },
1839 (AVRational){ 1, track->audio.out_samplerate });
1842 /* convert the delay from ns to the track timebase */
1843 track->codec_delay = av_rescale_q(track->codec_delay,
1844 (AVRational){ 1, 1000000000 },
1847 st->codecpar->codec_id = codec_id;
1849 if (strcmp(track->language, "und"))
1850 av_dict_set(&st->metadata, "language", track->language, 0);
1851 av_dict_set(&st->metadata, "title", track->name, 0);
1853 if (track->flag_default)
1854 st->disposition |= AV_DISPOSITION_DEFAULT;
1855 if (track->flag_forced)
1856 st->disposition |= AV_DISPOSITION_FORCED;
1858 if (!st->codecpar->extradata) {
1860 st->codecpar->extradata = extradata;
1861 st->codecpar->extradata_size = extradata_size;
1862 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1863 st->codecpar->extradata = av_mallocz(track->codec_priv.size +
1864 AV_INPUT_BUFFER_PADDING_SIZE);
1865 if (!st->codecpar->extradata)
1866 return AVERROR(ENOMEM);
1867 st->codecpar->extradata_size = track->codec_priv.size;
1868 memcpy(st->codecpar->extradata,
1869 track->codec_priv.data + extradata_offset,
1870 track->codec_priv.size);
1874 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1875 int display_width_mul = 1;
1876 int display_height_mul = 1;
1878 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
1879 st->codecpar->codec_tag = track->video.fourcc;
1880 st->codecpar->width = track->video.pixel_width;
1881 st->codecpar->height = track->video.pixel_height;
1883 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
1884 st->codecpar->field_order = mkv_field_order(track->video.field_order);
1886 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1887 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
1889 av_reduce(&st->sample_aspect_ratio.num,
1890 &st->sample_aspect_ratio.den,
1891 st->codecpar->height * track->video.display_width * display_width_mul,
1892 st->codecpar->width * track->video.display_height * display_height_mul,
1894 if (st->codecpar->codec_id != AV_CODEC_ID_H264 &&
1895 st->codecpar->codec_id != AV_CODEC_ID_HEVC)
1896 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1897 if (track->default_duration) {
1898 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1899 1000000000, track->default_duration, 30000);
1901 // add stream level stereo3d side data if it is a supported format
1902 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1903 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
1904 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
1908 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1909 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1910 st->codecpar->sample_rate = track->audio.out_samplerate;
1911 st->codecpar->channels = track->audio.channels;
1912 if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
1913 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1914 if (st->codecpar->codec_id == AV_CODEC_ID_MP3)
1915 st->need_parsing = AVSTREAM_PARSE_FULL;
1916 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1917 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
1918 if (st->codecpar->codec_id == AV_CODEC_ID_SSA)
1919 matroska->contains_ssa = 1;
1926 static int matroska_read_header(AVFormatContext *s)
1928 MatroskaDemuxContext *matroska = s->priv_data;
1929 EbmlList *attachments_list = &matroska->attachments;
1930 EbmlList *chapters_list = &matroska->chapters;
1931 MatroskaAttachment *attachments;
1932 MatroskaChapter *chapters;
1933 uint64_t max_start = 0;
1940 /* First read the EBML header. */
1941 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
1942 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
1943 ebml_free(ebml_syntax, &ebml);
1944 return AVERROR_INVALIDDATA;
1946 if (ebml.version > EBML_VERSION ||
1947 ebml.max_size > sizeof(uint64_t) ||
1948 ebml.id_length > sizeof(uint32_t) ||
1949 ebml.doctype_version > 3) {
1950 avpriv_report_missing_feature(matroska->ctx,
1951 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
1952 ebml.version, ebml.doctype, ebml.doctype_version);
1953 ebml_free(ebml_syntax, &ebml);
1954 return AVERROR_PATCHWELCOME;
1956 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1957 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1959 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1960 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1961 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1962 ebml_free(ebml_syntax, &ebml);
1963 return AVERROR_INVALIDDATA;
1966 ebml_free(ebml_syntax, &ebml);
1968 /* The next thing is a segment. */
1969 pos = avio_tell(matroska->ctx->pb);
1970 res = ebml_parse(matroska, matroska_segments, matroska);
1971 // try resyncing until we find a EBML_STOP type element.
1973 res = matroska_resync(matroska, pos);
1976 pos = avio_tell(matroska->ctx->pb);
1977 res = ebml_parse(matroska, matroska_segment, matroska);
1979 matroska_execute_seekhead(matroska);
1981 if (!matroska->time_scale)
1982 matroska->time_scale = 1000000;
1983 if (matroska->duration)
1984 matroska->ctx->duration = matroska->duration * matroska->time_scale *
1985 1000 / AV_TIME_BASE;
1986 av_dict_set(&s->metadata, "title", matroska->title, 0);
1988 res = matroska_parse_tracks(s);
1992 attachments = attachments_list->elem;
1993 for (j = 0; j < attachments_list->nb_elem; j++) {
1994 if (!(attachments[j].filename && attachments[j].mime &&
1995 attachments[j].bin.data && attachments[j].bin.size > 0)) {
1996 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1998 AVStream *st = avformat_new_stream(s, NULL);
2001 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2002 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2003 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2005 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2006 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2007 strlen(ff_mkv_image_mime_tags[i].str))) {
2008 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2013 attachments[j].stream = st;
2015 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2016 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2017 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2019 av_init_packet(&st->attached_pic);
2020 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2022 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2023 st->attached_pic.stream_index = st->index;
2024 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2026 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2027 st->codecpar->extradata = av_malloc(attachments[j].bin.size);
2028 if (!st->codecpar->extradata)
2031 st->codecpar->extradata_size = attachments[j].bin.size;
2032 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2033 attachments[j].bin.size);
2035 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2036 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2037 strlen(ff_mkv_mime_tags[i].str))) {
2038 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2046 chapters = chapters_list->elem;
2047 for (i = 0; i < chapters_list->nb_elem; i++)
2048 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2049 (max_start == 0 || chapters[i].start > max_start)) {
2050 chapters[i].chapter =
2051 avpriv_new_chapter(s, chapters[i].uid,
2052 (AVRational) { 1, 1000000000 },
2053 chapters[i].start, chapters[i].end,
2055 av_dict_set(&chapters[i].chapter->metadata,
2056 "title", chapters[i].title, 0);
2057 max_start = chapters[i].start;
2060 matroska_convert_tags(s);
2066 * Put one packet in an application-supplied AVPacket struct.
2067 * Returns 0 on success or -1 on failure.
2069 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2072 if (matroska->num_packets > 0) {
2073 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2074 av_free(matroska->packets[0]);
2075 if (matroska->num_packets > 1) {
2077 memmove(&matroska->packets[0], &matroska->packets[1],
2078 (matroska->num_packets - 1) * sizeof(AVPacket *));
2079 newpackets = av_realloc(matroska->packets,
2080 (matroska->num_packets - 1) *
2081 sizeof(AVPacket *));
2083 matroska->packets = newpackets;
2085 av_freep(&matroska->packets);
2086 matroska->prev_pkt = NULL;
2088 matroska->num_packets--;
2096 * Free all packets in our internal queue.
2098 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2100 matroska->prev_pkt = NULL;
2101 if (matroska->packets) {
2103 for (n = 0; n < matroska->num_packets; n++) {
2104 av_packet_unref(matroska->packets[n]);
2105 av_free(matroska->packets[n]);
2107 av_freep(&matroska->packets);
2108 matroska->num_packets = 0;
2112 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2113 int *buf_size, int type,
2114 uint32_t **lace_buf, int *laces)
2116 int res = 0, n, size = *buf_size;
2117 uint8_t *data = *buf;
2118 uint32_t *lace_size;
2122 *lace_buf = av_mallocz(sizeof(int));
2124 return AVERROR(ENOMEM);
2126 *lace_buf[0] = size;
2134 lace_size = av_mallocz(*laces * sizeof(int));
2136 return AVERROR(ENOMEM);
2139 case 0x1: /* Xiph lacing */
2143 for (n = 0; res == 0 && n < *laces - 1; n++) {
2150 lace_size[n] += temp;
2156 total += lace_size[n];
2158 if (size <= total) {
2159 res = AVERROR_INVALIDDATA;
2163 lace_size[n] = size - total;
2167 case 0x2: /* fixed-size lacing */
2168 if (size % (*laces)) {
2169 res = AVERROR_INVALIDDATA;
2172 for (n = 0; n < *laces; n++)
2173 lace_size[n] = size / *laces;
2176 case 0x3: /* EBML lacing */
2180 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2182 av_log(matroska->ctx, AV_LOG_INFO,
2183 "EBML block data error\n");
2189 total = lace_size[0] = num;
2190 for (n = 1; res == 0 && n < *laces - 1; n++) {
2193 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2195 av_log(matroska->ctx, AV_LOG_INFO,
2196 "EBML block data error\n");
2202 lace_size[n] = lace_size[n - 1] + snum;
2203 total += lace_size[n];
2205 if (size <= total) {
2206 res = AVERROR_INVALIDDATA;
2209 lace_size[*laces - 1] = size - total;
2215 *lace_buf = lace_size;
2221 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2222 MatroskaTrack *track, AVStream *st,
2223 uint8_t *data, int size, uint64_t timecode,
2224 uint64_t duration, int64_t pos)
2226 int a = st->codecpar->block_align;
2227 int sps = track->audio.sub_packet_size;
2228 int cfs = track->audio.coded_framesize;
2229 int h = track->audio.sub_packet_h;
2230 int y = track->audio.sub_packet_cnt;
2231 int w = track->audio.frame_size;
2234 if (!track->audio.pkt_cnt) {
2235 if (track->audio.sub_packet_cnt == 0)
2236 track->audio.buf_timecode = timecode;
2237 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2238 if (size < cfs * h / 2) {
2239 av_log(matroska->ctx, AV_LOG_ERROR,
2240 "Corrupt int4 RM-style audio packet size\n");
2241 return AVERROR_INVALIDDATA;
2243 for (x = 0; x < h / 2; x++)
2244 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2245 data + x * cfs, cfs);
2246 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2248 av_log(matroska->ctx, AV_LOG_ERROR,
2249 "Corrupt sipr RM-style audio packet size\n");
2250 return AVERROR_INVALIDDATA;
2252 memcpy(track->audio.buf + y * w, data, w);
2254 if (size < sps * w / sps) {
2255 av_log(matroska->ctx, AV_LOG_ERROR,
2256 "Corrupt generic RM-style audio packet size\n");
2257 return AVERROR_INVALIDDATA;
2259 for (x = 0; x < w / sps; x++)
2260 memcpy(track->audio.buf +
2261 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2262 data + x * sps, sps);
2265 if (++track->audio.sub_packet_cnt >= h) {
2266 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2267 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2268 track->audio.sub_packet_cnt = 0;
2269 track->audio.pkt_cnt = h * w / a;
2273 while (track->audio.pkt_cnt) {
2275 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2277 return AVERROR(ENOMEM);
2279 ret = av_new_packet(pkt, a);
2285 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2287 pkt->pts = track->audio.buf_timecode;
2288 track->audio.buf_timecode = AV_NOPTS_VALUE;
2290 pkt->stream_index = st->index;
2291 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2297 /* reconstruct full wavpack blocks from mangled matroska ones */
2298 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2299 uint8_t **pdst, int *size)
2301 uint8_t *dst = NULL;
2306 int ret, offset = 0;
2308 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2309 return AVERROR_INVALIDDATA;
2311 ver = AV_RL16(track->stream->codecpar->extradata);
2313 samples = AV_RL32(src);
2317 while (srclen >= 8) {
2322 uint32_t flags = AV_RL32(src);
2323 uint32_t crc = AV_RL32(src + 4);
2327 multiblock = (flags & 0x1800) != 0x1800;
2330 ret = AVERROR_INVALIDDATA;
2333 blocksize = AV_RL32(src);
2339 if (blocksize > srclen) {
2340 ret = AVERROR_INVALIDDATA;
2344 tmp = av_realloc(dst, dstlen + blocksize + 32);
2346 ret = AVERROR(ENOMEM);
2350 dstlen += blocksize + 32;
2352 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2353 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2354 AV_WL16(dst + offset + 8, ver); // version
2355 AV_WL16(dst + offset + 10, 0); // track/index_no
2356 AV_WL32(dst + offset + 12, 0); // total samples
2357 AV_WL32(dst + offset + 16, 0); // block index
2358 AV_WL32(dst + offset + 20, samples); // number of samples
2359 AV_WL32(dst + offset + 24, flags); // flags
2360 AV_WL32(dst + offset + 28, crc); // crc
2361 memcpy(dst + offset + 32, src, blocksize); // block data
2364 srclen -= blocksize;
2365 offset += blocksize + 32;
2378 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2379 MatroskaTrack *track, AVStream *st,
2380 uint8_t *data, int pkt_size,
2381 uint64_t timecode, uint64_t duration,
2382 int64_t pos, int is_keyframe)
2384 MatroskaTrackEncoding *encodings = track->encodings.elem;
2385 uint8_t *pkt_data = data;
2386 int offset = 0, res;
2389 if (encodings && encodings->scope & 1) {
2390 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2395 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
2397 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2399 av_log(matroska->ctx, AV_LOG_ERROR,
2400 "Error parsing a wavpack block.\n");
2403 if (pkt_data != data)
2404 av_freep(&pkt_data);
2408 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES)
2411 pkt = av_mallocz(sizeof(AVPacket));
2413 av_freep(&pkt_data);
2414 return AVERROR(ENOMEM);
2416 /* XXX: prevent data copy... */
2417 if (av_new_packet(pkt, pkt_size + offset) < 0) {
2419 av_freep(&pkt_data);
2420 return AVERROR(ENOMEM);
2423 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
2424 uint8_t *buf = pkt->data;
2425 bytestream_put_be32(&buf, pkt_size);
2426 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2429 memcpy(pkt->data + offset, pkt_data, pkt_size);
2431 if (pkt_data != data)
2434 pkt->flags = is_keyframe;
2435 pkt->stream_index = st->index;
2437 if (track->ms_compat)
2438 pkt->dts = timecode;
2440 pkt->pts = timecode;
2442 if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE || st->codecpar->codec_id == AV_CODEC_ID_SRT)
2443 pkt->duration = duration;
2444 #if FF_API_CONVERGENCE_DURATION
2445 FF_DISABLE_DEPRECATION_WARNINGS
2446 if (st->codecpar->codec_id == AV_CODEC_ID_SRT)
2447 pkt->convergence_duration = duration;
2448 FF_ENABLE_DEPRECATION_WARNINGS
2451 if (st->codecpar->codec_id == AV_CODEC_ID_SSA)
2452 matroska_fix_ass_packet(matroska, pkt, duration);
2454 if (matroska->prev_pkt &&
2455 timecode != AV_NOPTS_VALUE &&
2456 matroska->prev_pkt->pts == timecode &&
2457 matroska->prev_pkt->stream_index == st->index &&
2458 st->codecpar->codec_id == AV_CODEC_ID_SSA)
2459 matroska_merge_packets(matroska->prev_pkt, pkt);
2461 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2462 matroska->prev_pkt = pkt;
2468 if (pkt_data != data)
2469 av_freep(&pkt_data);
2473 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2474 int size, int64_t pos, uint64_t cluster_time,
2475 uint64_t block_duration, int is_keyframe,
2476 int64_t cluster_pos)
2478 uint64_t timecode = AV_NOPTS_VALUE;
2479 MatroskaTrack *track;
2483 uint32_t *lace_size = NULL;
2484 int n, flags, laces = 0;
2485 uint64_t num, duration;
2487 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2488 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2494 track = matroska_find_track_by_num(matroska, num);
2495 if (!track || !track->stream) {
2496 av_log(matroska->ctx, AV_LOG_INFO,
2497 "Invalid stream %"PRIu64" or size %u\n", num, size);
2498 return AVERROR_INVALIDDATA;
2499 } else if (size <= 3)
2502 if (st->discard >= AVDISCARD_ALL)
2505 block_time = AV_RB16(data);
2509 if (is_keyframe == -1)
2510 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2512 if (cluster_time != (uint64_t) -1 &&
2513 (block_time >= 0 || cluster_time >= -block_time)) {
2514 timecode = cluster_time + block_time - track->codec_delay;
2515 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2516 timecode < track->end_timecode)
2517 is_keyframe = 0; /* overlapping subtitles are not key frame */
2519 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2523 if (matroska->skip_to_keyframe &&
2524 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2525 if (!is_keyframe || timecode < matroska->skip_to_timecode)
2527 matroska->skip_to_keyframe = 0;
2530 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2531 &lace_size, &laces);
2536 if (block_duration != AV_NOPTS_VALUE) {
2537 duration = block_duration / laces;
2538 if (block_duration != duration * laces) {
2539 av_log(matroska->ctx, AV_LOG_WARNING,
2540 "Incorrect block_duration, possibly corrupted container");
2543 duration = track->default_duration / matroska->time_scale;
2544 block_duration = duration * laces;
2547 if (timecode != AV_NOPTS_VALUE)
2548 track->end_timecode =
2549 FFMAX(track->end_timecode, timecode + block_duration);
2551 for (n = 0; n < laces; n++) {
2552 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2553 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
2554 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2555 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
2556 st->codecpar->block_align && track->audio.sub_packet_size) {
2557 res = matroska_parse_rm_audio(matroska, track, st, data,
2559 timecode, duration, pos);
2563 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2564 timecode, duration, pos,
2565 !n ? is_keyframe : 0);
2570 if (timecode != AV_NOPTS_VALUE)
2571 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2572 data += lace_size[n];
2580 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2582 EbmlList *blocks_list;
2583 MatroskaBlock *blocks;
2585 res = ebml_parse(matroska,
2586 matroska_cluster_incremental_parsing,
2587 &matroska->current_cluster);
2590 if (matroska->current_cluster_pos)
2591 ebml_level_end(matroska);
2592 ebml_free(matroska_cluster, &matroska->current_cluster);
2593 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2594 matroska->current_cluster_num_blocks = 0;
2595 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2596 matroska->prev_pkt = NULL;
2597 /* sizeof the ID which was already read */
2598 if (matroska->current_id)
2599 matroska->current_cluster_pos -= 4;
2600 res = ebml_parse(matroska,
2601 matroska_clusters_incremental,
2602 &matroska->current_cluster);
2603 /* Try parsing the block again. */
2605 res = ebml_parse(matroska,
2606 matroska_cluster_incremental_parsing,
2607 &matroska->current_cluster);
2611 matroska->current_cluster_num_blocks <
2612 matroska->current_cluster.blocks.nb_elem) {
2613 blocks_list = &matroska->current_cluster.blocks;
2614 blocks = blocks_list->elem;
2616 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2617 i = blocks_list->nb_elem - 1;
2618 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2619 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2620 if (!blocks[i].non_simple)
2621 blocks[i].duration = AV_NOPTS_VALUE;
2622 res = matroska_parse_block(matroska, blocks[i].bin.data,
2623 blocks[i].bin.size, blocks[i].bin.pos,
2624 matroska->current_cluster.timecode,
2625 blocks[i].duration, is_keyframe,
2626 matroska->current_cluster_pos);
2635 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2637 MatroskaCluster cluster = { 0 };
2638 EbmlList *blocks_list;
2639 MatroskaBlock *blocks;
2643 if (!matroska->contains_ssa)
2644 return matroska_parse_cluster_incremental(matroska);
2645 pos = avio_tell(matroska->ctx->pb);
2646 matroska->prev_pkt = NULL;
2647 if (matroska->current_id)
2648 pos -= 4; /* sizeof the ID which was already read */
2649 res = ebml_parse(matroska, matroska_clusters, &cluster);
2650 blocks_list = &cluster.blocks;
2651 blocks = blocks_list->elem;
2652 for (i = 0; i < blocks_list->nb_elem && !res; i++)
2653 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2654 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2655 if (!blocks[i].non_simple)
2656 blocks[i].duration = AV_NOPTS_VALUE;
2657 res = matroska_parse_block(matroska, blocks[i].bin.data,
2658 blocks[i].bin.size, blocks[i].bin.pos,
2659 cluster.timecode, blocks[i].duration,
2662 ebml_free(matroska_cluster, &cluster);
2666 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2668 MatroskaDemuxContext *matroska = s->priv_data;
2671 while (!ret && matroska_deliver_packet(matroska, pkt)) {
2672 int64_t pos = avio_tell(matroska->ctx->pb);
2675 if (matroska_parse_cluster(matroska) < 0)
2676 ret = matroska_resync(matroska, pos);
2679 if (ret == AVERROR_INVALIDDATA && pkt->data) {
2680 pkt->flags |= AV_PKT_FLAG_CORRUPT;
2687 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2688 int64_t timestamp, int flags)
2690 MatroskaDemuxContext *matroska = s->priv_data;
2691 MatroskaTrack *tracks = NULL;
2692 AVStream *st = s->streams[stream_index];
2693 int i, index, index_sub, index_min;
2695 /* Parse the CUES now since we need the index data to seek. */
2696 if (matroska->cues_parsing_deferred) {
2697 matroska_parse_cues(matroska);
2698 matroska->cues_parsing_deferred = 0;
2701 if (!st->nb_index_entries)
2703 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2705 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2706 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
2708 matroska->current_id = 0;
2709 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2710 matroska_clear_queue(matroska);
2711 if (matroska_parse_cluster(matroska) < 0)
2716 matroska_clear_queue(matroska);
2721 tracks = matroska->tracks.elem;
2722 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2723 tracks[i].audio.pkt_cnt = 0;
2724 tracks[i].audio.sub_packet_cnt = 0;
2725 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2726 tracks[i].end_timecode = 0;
2727 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2728 tracks[i].stream->discard != AVDISCARD_ALL) {
2729 index_sub = av_index_search_timestamp(
2730 tracks[i].stream, st->index_entries[index].timestamp,
2731 AVSEEK_FLAG_BACKWARD);
2732 if (index_sub >= 0 &&
2733 st->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
2734 st->index_entries[index].timestamp -
2735 st->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
2736 index_min = index_sub;
2740 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2741 matroska->current_id = 0;
2742 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2743 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2745 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2749 static int matroska_read_close(AVFormatContext *s)
2751 MatroskaDemuxContext *matroska = s->priv_data;
2752 MatroskaTrack *tracks = matroska->tracks.elem;
2755 matroska_clear_queue(matroska);
2757 for (n = 0; n < matroska->tracks.nb_elem; n++)
2758 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2759 av_free(tracks[n].audio.buf);
2760 ebml_free(matroska_cluster, &matroska->current_cluster);
2761 ebml_free(matroska_segment, matroska);
2766 AVInputFormat ff_matroska_demuxer = {
2767 .name = "matroska,webm",
2768 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2769 .extensions = "mkv,mk3d,mka,mks",
2770 .priv_data_size = sizeof(MatroskaDemuxContext),
2771 .read_probe = matroska_probe,
2772 .read_header = matroska_read_header,
2773 .read_packet = matroska_read_packet,
2774 .read_close = matroska_read_close,
2775 .read_seek = matroska_read_seek,
2776 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"