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;
126 uint64_t stereo_mode;
127 } MatroskaTrackVideo;
129 typedef struct MatroskaTrackAudio {
131 double out_samplerate;
135 /* real audio header (extracted from extradata) */
142 uint64_t buf_timecode;
144 } MatroskaTrackAudio;
146 typedef struct MatroskaTrack {
155 uint64_t default_duration;
156 uint64_t flag_default;
157 uint64_t flag_forced;
158 MatroskaTrackVideo video;
159 MatroskaTrackAudio audio;
161 uint64_t codec_delay;
164 int64_t end_timecode;
168 typedef struct MatroskaAttachment {
175 } MatroskaAttachment;
177 typedef struct MatroskaChapter {
186 typedef struct MatroskaIndexPos {
191 typedef struct MatroskaIndex {
196 typedef struct MatroskaTag {
204 typedef struct MatroskaTagTarget {
212 typedef struct MatroskaTags {
213 MatroskaTagTarget target;
217 typedef struct MatroskaSeekhead {
222 typedef struct MatroskaLevel {
227 typedef struct MatroskaCluster {
232 typedef struct MatroskaDemuxContext {
233 AVFormatContext *ctx;
237 MatroskaLevel levels[EBML_MAX_DEPTH];
245 EbmlList attachments;
251 /* byte position of the segment inside the stream */
252 int64_t segment_start;
254 /* the packet queue */
261 /* What to skip before effectively reading a packet. */
262 int skip_to_keyframe;
263 uint64_t skip_to_timecode;
265 /* File has a CUES element, but we defer parsing until it is needed. */
266 int cues_parsing_deferred;
268 int current_cluster_num_blocks;
269 int64_t current_cluster_pos;
270 MatroskaCluster current_cluster;
272 /* File has SSA subtitles which prevent incremental cluster parsing. */
274 } MatroskaDemuxContext;
276 typedef struct MatroskaBlock {
283 static EbmlSyntax ebml_header[] = {
284 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
285 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
286 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
287 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
288 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
289 { EBML_ID_EBMLVERSION, EBML_NONE },
290 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
294 static EbmlSyntax ebml_syntax[] = {
295 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
299 static EbmlSyntax matroska_info[] = {
300 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
301 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
302 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
303 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
304 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
305 { MATROSKA_ID_DATEUTC, EBML_NONE },
306 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
310 static EbmlSyntax matroska_track_video[] = {
311 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
312 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width) },
313 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height) },
314 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
315 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
316 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, fourcc) },
317 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
318 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
319 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
320 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
321 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
322 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_NONE },
323 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
324 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
328 static EbmlSyntax matroska_track_audio[] = {
329 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
330 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
331 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
332 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
336 static EbmlSyntax matroska_track_encoding_compression[] = {
337 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
338 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
342 static EbmlSyntax matroska_track_encoding[] = {
343 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
344 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
345 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
346 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
350 static EbmlSyntax matroska_track_encodings[] = {
351 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
355 static EbmlSyntax matroska_track[] = {
356 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
357 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
358 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
359 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
360 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
361 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
362 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
363 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
364 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
365 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
366 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
367 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
368 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
369 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
370 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
371 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
372 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
373 { MATROSKA_ID_CODECNAME, EBML_NONE },
374 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
375 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
376 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
377 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
378 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
379 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
383 static EbmlSyntax matroska_tracks[] = {
384 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
388 static EbmlSyntax matroska_attachment[] = {
389 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
390 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
391 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
392 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
393 { MATROSKA_ID_FILEDESC, EBML_NONE },
397 static EbmlSyntax matroska_attachments[] = {
398 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
402 static EbmlSyntax matroska_chapter_display[] = {
403 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
404 { MATROSKA_ID_CHAPLANG, EBML_NONE },
408 static EbmlSyntax matroska_chapter_entry[] = {
409 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
410 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
411 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
412 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
413 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
414 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
415 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
416 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
420 static EbmlSyntax matroska_chapter[] = {
421 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
422 { MATROSKA_ID_EDITIONUID, EBML_NONE },
423 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
424 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
425 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
429 static EbmlSyntax matroska_chapters[] = {
430 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
434 static EbmlSyntax matroska_index_pos[] = {
435 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
436 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
437 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
441 static EbmlSyntax matroska_index_entry[] = {
442 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
443 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
447 static EbmlSyntax matroska_index[] = {
448 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
452 static EbmlSyntax matroska_simpletag[] = {
453 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
454 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
455 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
456 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
457 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
458 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
462 static EbmlSyntax matroska_tagtargets[] = {
463 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
464 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
465 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
466 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
467 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
471 static EbmlSyntax matroska_tag[] = {
472 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
473 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
477 static EbmlSyntax matroska_tags[] = {
478 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
482 static EbmlSyntax matroska_seekhead_entry[] = {
483 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
484 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
488 static EbmlSyntax matroska_seekhead[] = {
489 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
493 static EbmlSyntax matroska_segment[] = {
494 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, { .n = matroska_info } },
495 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, { .n = matroska_tracks } },
496 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, { .n = matroska_attachments } },
497 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, { .n = matroska_chapters } },
498 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, { .n = matroska_index } },
499 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, { .n = matroska_tags } },
500 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, { .n = matroska_seekhead } },
501 { MATROSKA_ID_CLUSTER, EBML_STOP },
505 static EbmlSyntax matroska_segments[] = {
506 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
510 static EbmlSyntax matroska_blockgroup[] = {
511 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
512 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
513 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration), { .u = AV_NOPTS_VALUE } },
514 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock, reference) },
515 { MATROSKA_ID_CODECSTATE, EBML_NONE },
516 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
520 static EbmlSyntax matroska_cluster[] = {
521 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
522 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
523 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
524 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
525 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
529 static EbmlSyntax matroska_clusters[] = {
530 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
531 { MATROSKA_ID_INFO, EBML_NONE },
532 { MATROSKA_ID_CUES, EBML_NONE },
533 { MATROSKA_ID_TAGS, EBML_NONE },
534 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
538 static EbmlSyntax matroska_cluster_incremental_parsing[] = {
539 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
540 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
541 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
542 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
543 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
544 { MATROSKA_ID_INFO, EBML_NONE },
545 { MATROSKA_ID_CUES, EBML_NONE },
546 { MATROSKA_ID_TAGS, EBML_NONE },
547 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
548 { MATROSKA_ID_CLUSTER, EBML_STOP },
552 static EbmlSyntax matroska_cluster_incremental[] = {
553 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
554 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
555 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
556 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
557 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
561 static EbmlSyntax matroska_clusters_incremental[] = {
562 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
563 { MATROSKA_ID_INFO, EBML_NONE },
564 { MATROSKA_ID_CUES, EBML_NONE },
565 { MATROSKA_ID_TAGS, EBML_NONE },
566 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
570 static const char *const matroska_doctypes[] = { "matroska", "webm" };
572 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
574 AVIOContext *pb = matroska->ctx->pb;
576 matroska->current_id = 0;
577 matroska->num_levels = 0;
579 /* seek to next position to resync from */
580 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
585 // try to find a toplevel element
586 while (!pb->eof_reached) {
587 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
588 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
589 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
590 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
591 matroska->current_id = id;
594 id = (id << 8) | avio_r8(pb);
603 * Return: Whether we reached the end of a level in the hierarchy or not.
605 static int ebml_level_end(MatroskaDemuxContext *matroska)
607 AVIOContext *pb = matroska->ctx->pb;
608 int64_t pos = avio_tell(pb);
610 if (matroska->num_levels > 0) {
611 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
612 if (pos - level->start >= level->length || matroska->current_id) {
613 matroska->num_levels--;
621 * Read: an "EBML number", which is defined as a variable-length
622 * array of bytes. The first byte indicates the length by giving a
623 * number of 0-bits followed by a one. The position of the first
624 * "one" bit inside the first byte indicates the length of this
626 * Returns: number of bytes read, < 0 on error
628 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
629 int max_size, uint64_t *number)
634 /* The first byte tells us the length in bytes - avio_r8() can normally
635 * return 0, but since that's not a valid first ebmlID byte, we can
636 * use it safely here to catch EOS. */
637 if (!(total = avio_r8(pb))) {
638 /* we might encounter EOS here */
639 if (!pb->eof_reached) {
640 int64_t pos = avio_tell(pb);
641 av_log(matroska->ctx, AV_LOG_ERROR,
642 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
644 return pb->error ? pb->error : AVERROR(EIO);
649 /* get the length of the EBML number */
650 read = 8 - ff_log2_tab[total];
651 if (read > max_size) {
652 int64_t pos = avio_tell(pb) - 1;
653 av_log(matroska->ctx, AV_LOG_ERROR,
654 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
655 (uint8_t) total, pos, pos);
656 return AVERROR_INVALIDDATA;
659 /* read out length */
660 total ^= 1 << ff_log2_tab[total];
662 total = (total << 8) | avio_r8(pb);
670 * Read a EBML length value.
671 * This needs special handling for the "unknown length" case which has multiple
674 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
677 int res = ebml_read_num(matroska, pb, 8, number);
678 if (res > 0 && *number + 1 == 1ULL << (7 * res))
679 *number = 0xffffffffffffffULL;
684 * Read the next element as an unsigned int.
685 * 0 is success, < 0 is failure.
687 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
692 return AVERROR_INVALIDDATA;
694 /* big-endian ordering; build up number */
697 *num = (*num << 8) | avio_r8(pb);
703 * Read the next element as a float.
704 * 0 is success, < 0 is failure.
706 static int ebml_read_float(AVIOContext *pb, int size, double *num)
711 *num = av_int2float(avio_rb32(pb));
713 *num = av_int2double(avio_rb64(pb));
715 return AVERROR_INVALIDDATA;
721 * Read the next element as an ASCII string.
722 * 0 is success, < 0 is failure.
724 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
728 /* EBML strings are usually not 0-terminated, so we allocate one
729 * byte more, read the string and NULL-terminate it ourselves. */
730 if (!(res = av_malloc(size + 1)))
731 return AVERROR(ENOMEM);
732 if (avio_read(pb, (uint8_t *) res, size) != size) {
744 * Read the next element as binary data.
745 * 0 is success, < 0 is failure.
747 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
750 if (!(bin->data = av_mallocz(length + AV_INPUT_BUFFER_PADDING_SIZE)))
751 return AVERROR(ENOMEM);
754 bin->pos = avio_tell(pb);
755 if (avio_read(pb, bin->data, length) != length) {
756 av_freep(&bin->data);
764 * Read the next element, but only the header. The contents
765 * are supposed to be sub-elements which can be read separately.
766 * 0 is success, < 0 is failure.
768 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
770 AVIOContext *pb = matroska->ctx->pb;
771 MatroskaLevel *level;
773 if (matroska->num_levels >= EBML_MAX_DEPTH) {
774 av_log(matroska->ctx, AV_LOG_ERROR,
775 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
776 return AVERROR(ENOSYS);
779 level = &matroska->levels[matroska->num_levels++];
780 level->start = avio_tell(pb);
781 level->length = length;
787 * Read signed/unsigned "EBML" numbers.
788 * Return: number of bytes processed, < 0 on error
790 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
791 uint8_t *data, uint32_t size, uint64_t *num)
794 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
795 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
799 * Same as above, but signed.
801 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
802 uint8_t *data, uint32_t size, int64_t *num)
807 /* read as unsigned number first */
808 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
811 /* make signed (weird way) */
812 *num = unum - ((1LL << (7 * res - 1)) - 1);
817 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
818 EbmlSyntax *syntax, void *data);
820 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
821 uint32_t id, void *data)
824 for (i = 0; syntax[i].id; i++)
825 if (id == syntax[i].id)
827 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
828 matroska->num_levels > 0 &&
829 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
830 return 0; // we reached the end of an unknown size cluster
831 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
832 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%"PRIX32"\n", id);
833 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
834 return AVERROR_INVALIDDATA;
836 return ebml_parse_elem(matroska, &syntax[i], data);
839 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
842 if (!matroska->current_id) {
844 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
847 matroska->current_id = id | 1 << 7 * res;
849 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
852 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
857 for (i = 0; syntax[i].id; i++)
858 switch (syntax[i].type) {
860 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
863 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
867 // the default may be NULL
868 if (syntax[i].def.s) {
869 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
870 *dst = av_strdup(syntax[i].def.s);
872 return AVERROR(ENOMEM);
877 while (!res && !ebml_level_end(matroska))
878 res = ebml_parse(matroska, syntax, data);
883 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
884 EbmlSyntax *syntax, void *data)
886 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
889 // max. 16 MB for strings
890 [EBML_STR] = 0x1000000,
891 [EBML_UTF8] = 0x1000000,
892 // max. 256 MB for binary data
893 [EBML_BIN] = 0x10000000,
894 // no limits for anything else
896 AVIOContext *pb = matroska->ctx->pb;
897 uint32_t id = syntax->id;
901 data = (char *) data + syntax->data_offset;
902 if (syntax->list_elem_size) {
903 EbmlList *list = data;
904 if ((res = av_reallocp_array(&list->elem,
906 syntax->list_elem_size)) < 0) {
910 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
911 memset(data, 0, syntax->list_elem_size);
915 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
916 matroska->current_id = 0;
917 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
919 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
920 av_log(matroska->ctx, AV_LOG_ERROR,
921 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
922 length, max_lengths[syntax->type], syntax->type);
923 return AVERROR_INVALIDDATA;
927 switch (syntax->type) {
929 res = ebml_read_uint(pb, length, data);
932 res = ebml_read_float(pb, length, data);
936 res = ebml_read_ascii(pb, length, data);
939 res = ebml_read_binary(pb, length, data);
942 if ((res = ebml_read_master(matroska, length)) < 0)
944 if (id == MATROSKA_ID_SEGMENT)
945 matroska->segment_start = avio_tell(matroska->ctx->pb);
946 return ebml_parse_nest(matroska, syntax->def.n, data);
948 return ebml_parse_id(matroska, syntax->def.n, id, data);
952 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
954 if (res == AVERROR_INVALIDDATA)
955 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
956 else if (res == AVERROR(EIO))
957 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
961 static void ebml_free(EbmlSyntax *syntax, void *data)
964 for (i = 0; syntax[i].id; i++) {
965 void *data_off = (char *) data + syntax[i].data_offset;
966 switch (syntax[i].type) {
972 av_freep(&((EbmlBin *) data_off)->data);
975 if (syntax[i].list_elem_size) {
976 EbmlList *list = data_off;
977 char *ptr = list->elem;
978 for (j = 0; j < list->nb_elem;
979 j++, ptr += syntax[i].list_elem_size)
980 ebml_free(syntax[i].def.n, ptr);
983 ebml_free(syntax[i].def.n, data_off);
993 static int matroska_probe(AVProbeData *p)
996 int len_mask = 0x80, size = 1, n = 1, i;
999 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1002 /* length of header */
1004 while (size <= 8 && !(total & len_mask)) {
1010 total &= (len_mask - 1);
1012 total = (total << 8) | p->buf[4 + n++];
1014 /* Does the probe data contain the whole header? */
1015 if (p->buf_size < 4 + size + total)
1018 /* The header should contain a known document type. For now,
1019 * we don't parse the whole header but simply check for the
1020 * availability of that array of characters inside the header.
1021 * Not fully fool-proof, but good enough. */
1022 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1023 int probelen = strlen(matroska_doctypes[i]);
1024 if (total < probelen)
1026 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1027 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1028 return AVPROBE_SCORE_MAX;
1031 // probably valid EBML header but no recognized doctype
1032 return AVPROBE_SCORE_EXTENSION;
1035 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1038 MatroskaTrack *tracks = matroska->tracks.elem;
1041 for (i = 0; i < matroska->tracks.nb_elem; i++)
1042 if (tracks[i].num == num)
1045 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1049 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1050 MatroskaTrack *track)
1052 MatroskaTrackEncoding *encodings = track->encodings.elem;
1053 uint8_t *data = *buf;
1054 int isize = *buf_size;
1055 uint8_t *pkt_data = NULL;
1056 uint8_t av_unused *newpktdata;
1057 int pkt_size = isize;
1061 if (pkt_size >= 10000000)
1062 return AVERROR_INVALIDDATA;
1064 switch (encodings[0].compression.algo) {
1065 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1067 int header_size = encodings[0].compression.settings.size;
1068 uint8_t *header = encodings[0].compression.settings.data;
1073 pkt_size = isize + header_size;
1074 pkt_data = av_malloc(pkt_size);
1076 return AVERROR(ENOMEM);
1078 memcpy(pkt_data, header, header_size);
1079 memcpy(pkt_data + header_size, data, isize);
1083 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1085 olen = pkt_size *= 3;
1086 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1088 result = AVERROR(ENOMEM);
1091 pkt_data = newpktdata;
1092 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1093 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1095 result = AVERROR_INVALIDDATA;
1102 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1104 z_stream zstream = { 0 };
1105 if (inflateInit(&zstream) != Z_OK)
1107 zstream.next_in = data;
1108 zstream.avail_in = isize;
1111 newpktdata = av_realloc(pkt_data, pkt_size);
1113 inflateEnd(&zstream);
1116 pkt_data = newpktdata;
1117 zstream.avail_out = pkt_size - zstream.total_out;
1118 zstream.next_out = pkt_data + zstream.total_out;
1119 result = inflate(&zstream, Z_NO_FLUSH);
1120 } while (result == Z_OK && pkt_size < 10000000);
1121 pkt_size = zstream.total_out;
1122 inflateEnd(&zstream);
1123 if (result != Z_STREAM_END) {
1124 if (result == Z_MEM_ERROR)
1125 result = AVERROR(ENOMEM);
1127 result = AVERROR_INVALIDDATA;
1134 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1136 bz_stream bzstream = { 0 };
1137 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1139 bzstream.next_in = data;
1140 bzstream.avail_in = isize;
1143 newpktdata = av_realloc(pkt_data, pkt_size);
1145 BZ2_bzDecompressEnd(&bzstream);
1148 pkt_data = newpktdata;
1149 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1150 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1151 result = BZ2_bzDecompress(&bzstream);
1152 } while (result == BZ_OK && pkt_size < 10000000);
1153 pkt_size = bzstream.total_out_lo32;
1154 BZ2_bzDecompressEnd(&bzstream);
1155 if (result != BZ_STREAM_END) {
1156 if (result == BZ_MEM_ERROR)
1157 result = AVERROR(ENOMEM);
1159 result = AVERROR_INVALIDDATA;
1166 return AVERROR_INVALIDDATA;
1170 *buf_size = pkt_size;
1178 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1179 AVPacket *pkt, uint64_t display_duration)
1182 char *layer, *ptr = pkt->data, *end = ptr + pkt->size;
1184 for (; *ptr != ',' && ptr < end - 1; ptr++)
1188 for (; *ptr != ',' && ptr < end - 1; ptr++)
1191 int64_t end_pts = pkt->pts + display_duration;
1192 int sc = matroska->time_scale * pkt->pts / 10000000;
1193 int ec = matroska->time_scale * end_pts / 10000000;
1194 int sh, sm, ss, eh, em, es, len;
1208 len = 50 + end - ptr + AV_INPUT_BUFFER_PADDING_SIZE;
1209 if (!(line = av_buffer_alloc(len)))
1211 snprintf(line->data, len,
1212 "Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1213 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1214 av_buffer_unref(&pkt->buf);
1216 pkt->data = line->data;
1217 pkt->size = strlen(line->data);
1221 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1223 int old_size = out->size;
1224 int ret = av_grow_packet(out, in->size);
1228 memcpy(out->data + old_size, in->data, in->size);
1230 av_packet_unref(in);
1235 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1236 AVDictionary **metadata, char *prefix)
1238 MatroskaTag *tags = list->elem;
1242 for (i = 0; i < list->nb_elem; i++) {
1243 const char *lang = tags[i].lang &&
1244 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1246 if (!tags[i].name) {
1247 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1251 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1253 av_strlcpy(key, tags[i].name, sizeof(key));
1254 if (tags[i].def || !lang) {
1255 av_dict_set(metadata, key, tags[i].string, 0);
1256 if (tags[i].sub.nb_elem)
1257 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1260 av_strlcat(key, "-", sizeof(key));
1261 av_strlcat(key, lang, sizeof(key));
1262 av_dict_set(metadata, key, tags[i].string, 0);
1263 if (tags[i].sub.nb_elem)
1264 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1267 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1270 static void matroska_convert_tags(AVFormatContext *s)
1272 MatroskaDemuxContext *matroska = s->priv_data;
1273 MatroskaTags *tags = matroska->tags.elem;
1276 for (i = 0; i < matroska->tags.nb_elem; i++) {
1277 if (tags[i].target.attachuid) {
1278 MatroskaAttachment *attachment = matroska->attachments.elem;
1279 for (j = 0; j < matroska->attachments.nb_elem; j++)
1280 if (attachment[j].uid == tags[i].target.attachuid &&
1281 attachment[j].stream)
1282 matroska_convert_tag(s, &tags[i].tag,
1283 &attachment[j].stream->metadata, NULL);
1284 } else if (tags[i].target.chapteruid) {
1285 MatroskaChapter *chapter = matroska->chapters.elem;
1286 for (j = 0; j < matroska->chapters.nb_elem; j++)
1287 if (chapter[j].uid == tags[i].target.chapteruid &&
1289 matroska_convert_tag(s, &tags[i].tag,
1290 &chapter[j].chapter->metadata, NULL);
1291 } else if (tags[i].target.trackuid) {
1292 MatroskaTrack *track = matroska->tracks.elem;
1293 for (j = 0; j < matroska->tracks.nb_elem; j++)
1294 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1295 matroska_convert_tag(s, &tags[i].tag,
1296 &track[j].stream->metadata, NULL);
1298 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1299 tags[i].target.type);
1304 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1307 EbmlList *seekhead_list = &matroska->seekhead;
1308 uint32_t level_up = matroska->level_up;
1309 uint32_t saved_id = matroska->current_id;
1310 MatroskaSeekhead *seekhead = seekhead_list->elem;
1311 int64_t before_pos = avio_tell(matroska->ctx->pb);
1312 MatroskaLevel level;
1316 if (idx >= seekhead_list->nb_elem ||
1317 seekhead[idx].id == MATROSKA_ID_SEEKHEAD ||
1318 seekhead[idx].id == MATROSKA_ID_CLUSTER)
1322 offset = seekhead[idx].pos + matroska->segment_start;
1323 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1324 /* We don't want to lose our seekhead level, so we add
1325 * a dummy. This is a crude hack. */
1326 if (matroska->num_levels == EBML_MAX_DEPTH) {
1327 av_log(matroska->ctx, AV_LOG_INFO,
1328 "Max EBML element depth (%d) reached, "
1329 "cannot parse further.\n", EBML_MAX_DEPTH);
1330 ret = AVERROR_INVALIDDATA;
1333 level.length = (uint64_t) -1;
1334 matroska->levels[matroska->num_levels] = level;
1335 matroska->num_levels++;
1336 matroska->current_id = 0;
1338 ret = ebml_parse(matroska, matroska_segment, matroska);
1340 /* remove dummy level */
1341 while (matroska->num_levels) {
1342 uint64_t length = matroska->levels[--matroska->num_levels].length;
1343 if (length == (uint64_t) -1)
1349 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1350 matroska->level_up = level_up;
1351 matroska->current_id = saved_id;
1356 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1358 EbmlList *seekhead_list = &matroska->seekhead;
1359 int64_t before_pos = avio_tell(matroska->ctx->pb);
1362 // we should not do any seeking in the streaming case
1363 if (!matroska->ctx->pb->seekable ||
1364 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1367 for (i = 0; i < seekhead_list->nb_elem; i++) {
1368 MatroskaSeekhead *seekhead = seekhead_list->elem;
1369 if (seekhead[i].pos <= before_pos)
1372 // defer cues parsing until we actually need cue data.
1373 if (seekhead[i].id == MATROSKA_ID_CUES) {
1374 matroska->cues_parsing_deferred = 1;
1378 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1383 static void matroska_parse_cues(MatroskaDemuxContext *matroska)
1385 EbmlList *seekhead_list = &matroska->seekhead;
1386 MatroskaSeekhead *seekhead = seekhead_list->elem;
1387 EbmlList *index_list;
1388 MatroskaIndex *index;
1389 int index_scale = 1;
1392 for (i = 0; i < seekhead_list->nb_elem; i++)
1393 if (seekhead[i].id == MATROSKA_ID_CUES)
1395 assert(i <= seekhead_list->nb_elem);
1397 matroska_parse_seekhead_entry(matroska, i);
1399 index_list = &matroska->index;
1400 index = index_list->elem;
1401 if (index_list->nb_elem &&
1402 index[0].time > 1E14 / matroska->time_scale) {
1403 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1404 index_scale = matroska->time_scale;
1406 for (i = 0; i < index_list->nb_elem; i++) {
1407 EbmlList *pos_list = &index[i].pos;
1408 MatroskaIndexPos *pos = pos_list->elem;
1409 for (j = 0; j < pos_list->nb_elem; j++) {
1410 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1412 if (track && track->stream)
1413 av_add_index_entry(track->stream,
1414 pos[j].pos + matroska->segment_start,
1415 index[i].time / index_scale, 0, 0,
1421 static int matroska_aac_profile(char *codec_id)
1423 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1426 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1427 if (strstr(codec_id, aac_profiles[profile]))
1432 static int matroska_aac_sri(int samplerate)
1436 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1437 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1442 static int matroska_parse_flac(AVFormatContext *s,
1443 MatroskaTrack *track,
1446 AVStream *st = track->stream;
1447 uint8_t *p = track->codec_priv.data;
1448 int size = track->codec_priv.size;
1450 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1451 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1452 track->codec_priv.size = 0;
1456 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1458 p += track->codec_priv.size;
1459 size -= track->codec_priv.size;
1461 /* parse the remaining metadata blocks if present */
1463 int block_last, block_type, block_size;
1465 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1469 if (block_size > size)
1472 /* check for the channel mask */
1473 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1474 AVDictionary *dict = NULL;
1475 AVDictionaryEntry *chmask;
1477 ff_vorbis_comment(s, &dict, p, block_size, 0);
1478 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1480 uint64_t mask = strtol(chmask->value, NULL, 0);
1481 if (!mask || mask & ~0x3ffffULL) {
1482 av_log(s, AV_LOG_WARNING,
1483 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1485 st->codec->channel_layout = mask;
1487 av_dict_free(&dict);
1497 static int matroska_parse_tracks(AVFormatContext *s)
1499 MatroskaDemuxContext *matroska = s->priv_data;
1500 MatroskaTrack *tracks = matroska->tracks.elem;
1504 for (i = 0; i < matroska->tracks.nb_elem; i++) {
1505 MatroskaTrack *track = &tracks[i];
1506 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1507 EbmlList *encodings_list = &track->encodings;
1508 MatroskaTrackEncoding *encodings = encodings_list->elem;
1509 uint8_t *extradata = NULL;
1510 int extradata_size = 0;
1511 int extradata_offset = 0;
1514 /* Apply some sanity checks. */
1515 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1516 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1517 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1518 av_log(matroska->ctx, AV_LOG_INFO,
1519 "Unknown or unsupported track type %"PRIu64"\n",
1523 if (!track->codec_id)
1526 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1527 if (!track->default_duration && track->video.frame_rate > 0)
1528 track->default_duration = 1000000000 / track->video.frame_rate;
1529 if (!track->video.display_width)
1530 track->video.display_width = track->video.pixel_width;
1531 if (!track->video.display_height)
1532 track->video.display_height = track->video.pixel_height;
1533 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1534 if (!track->audio.out_samplerate)
1535 track->audio.out_samplerate = track->audio.samplerate;
1537 if (encodings_list->nb_elem > 1) {
1538 av_log(matroska->ctx, AV_LOG_ERROR,
1539 "Multiple combined encodings not supported");
1540 } else if (encodings_list->nb_elem == 1) {
1541 if (encodings[0].type ||
1544 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1547 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1550 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1552 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP)) {
1553 encodings[0].scope = 0;
1554 av_log(matroska->ctx, AV_LOG_ERROR,
1555 "Unsupported encoding type");
1556 } else if (track->codec_priv.size && encodings[0].scope & 2) {
1557 uint8_t *codec_priv = track->codec_priv.data;
1558 int ret = matroska_decode_buffer(&track->codec_priv.data,
1559 &track->codec_priv.size,
1562 track->codec_priv.data = NULL;
1563 track->codec_priv.size = 0;
1564 av_log(matroska->ctx, AV_LOG_ERROR,
1565 "Failed to decode codec private data\n");
1568 if (codec_priv != track->codec_priv.data)
1569 av_free(codec_priv);
1573 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1574 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1575 strlen(ff_mkv_codec_tags[j].str))) {
1576 codec_id = ff_mkv_codec_tags[j].id;
1581 st = track->stream = avformat_new_stream(s, NULL);
1583 return AVERROR(ENOMEM);
1585 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1586 track->codec_priv.size >= 40 &&
1587 track->codec_priv.data) {
1588 track->ms_compat = 1;
1589 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1590 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
1591 track->video.fourcc);
1592 extradata_offset = 40;
1593 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1594 track->codec_priv.size >= 14 &&
1595 track->codec_priv.data) {
1597 ffio_init_context(&b, track->codec_priv.data,
1598 track->codec_priv.size,
1599 0, NULL, NULL, NULL, NULL);
1600 ret = ff_get_wav_header(s, &b, st->codec, track->codec_priv.size);
1603 codec_id = st->codec->codec_id;
1604 extradata_offset = FFMIN(track->codec_priv.size, 18);
1605 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1606 (track->codec_priv.size >= 86) &&
1607 (track->codec_priv.data)) {
1608 track->video.fourcc = AV_RL32(track->codec_priv.data);
1609 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
1610 track->video.fourcc);
1611 if (codec_id == AV_CODEC_ID_NONE) {
1613 av_get_codec_tag_string(buf, sizeof(buf), track->video.fourcc);
1614 av_log(matroska->ctx, AV_LOG_ERROR,
1615 "mov FourCC not found %s.\n", buf);
1617 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1618 switch (track->audio.bitdepth) {
1620 codec_id = AV_CODEC_ID_PCM_U8;
1623 codec_id = AV_CODEC_ID_PCM_S24BE;
1626 codec_id = AV_CODEC_ID_PCM_S32BE;
1629 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1630 switch (track->audio.bitdepth) {
1632 codec_id = AV_CODEC_ID_PCM_U8;
1635 codec_id = AV_CODEC_ID_PCM_S24LE;
1638 codec_id = AV_CODEC_ID_PCM_S32LE;
1641 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1642 track->audio.bitdepth == 64) {
1643 codec_id = AV_CODEC_ID_PCM_F64LE;
1644 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1645 int profile = matroska_aac_profile(track->codec_id);
1646 int sri = matroska_aac_sri(track->audio.samplerate);
1647 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
1649 return AVERROR(ENOMEM);
1650 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1651 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1652 if (strstr(track->codec_id, "SBR")) {
1653 sri = matroska_aac_sri(track->audio.out_samplerate);
1654 extradata[2] = 0x56;
1655 extradata[3] = 0xE5;
1656 extradata[4] = 0x80 | (sri << 3);
1660 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1661 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1662 * Create the "atom size", "tag", and "tag version" fields the
1663 * decoder expects manually. */
1664 extradata_size = 12 + track->codec_priv.size;
1665 extradata = av_mallocz(extradata_size +
1666 AV_INPUT_BUFFER_PADDING_SIZE);
1668 return AVERROR(ENOMEM);
1669 AV_WB32(extradata, extradata_size);
1670 memcpy(&extradata[4], "alac", 4);
1671 AV_WB32(&extradata[8], 0);
1672 memcpy(&extradata[12], track->codec_priv.data,
1673 track->codec_priv.size);
1674 } else if (codec_id == AV_CODEC_ID_TTA) {
1675 extradata_size = 30;
1676 extradata = av_mallocz(extradata_size);
1678 return AVERROR(ENOMEM);
1679 ffio_init_context(&b, extradata, extradata_size, 1,
1680 NULL, NULL, NULL, NULL);
1681 avio_write(&b, "TTA1", 4);
1683 avio_wl16(&b, track->audio.channels);
1684 avio_wl16(&b, track->audio.bitdepth);
1685 avio_wl32(&b, track->audio.out_samplerate);
1686 avio_wl32(&b, matroska->ctx->duration *
1687 track->audio.out_samplerate);
1688 } else if (codec_id == AV_CODEC_ID_RV10 ||
1689 codec_id == AV_CODEC_ID_RV20 ||
1690 codec_id == AV_CODEC_ID_RV30 ||
1691 codec_id == AV_CODEC_ID_RV40) {
1692 extradata_offset = 26;
1693 } else if (codec_id == AV_CODEC_ID_RA_144) {
1694 track->audio.out_samplerate = 8000;
1695 track->audio.channels = 1;
1696 } else if (codec_id == AV_CODEC_ID_RA_288 ||
1697 codec_id == AV_CODEC_ID_COOK ||
1698 codec_id == AV_CODEC_ID_ATRAC3 ||
1699 codec_id == AV_CODEC_ID_SIPR) {
1701 ffio_init_context(&b, track->codec_priv.data,
1702 track->codec_priv.size,
1703 0, NULL, NULL, NULL, NULL);
1705 flavor = avio_rb16(&b);
1706 track->audio.coded_framesize = avio_rb32(&b);
1708 track->audio.sub_packet_h = avio_rb16(&b);
1709 track->audio.frame_size = avio_rb16(&b);
1710 track->audio.sub_packet_size = avio_rb16(&b);
1712 track->audio.coded_framesize <= 0 ||
1713 track->audio.sub_packet_h <= 0 ||
1714 track->audio.frame_size <= 0 ||
1715 track->audio.sub_packet_size <= 0)
1716 return AVERROR_INVALIDDATA;
1717 track->audio.buf = av_malloc(track->audio.frame_size *
1718 track->audio.sub_packet_h);
1719 if (!track->audio.buf)
1720 return AVERROR(ENOMEM);
1721 if (codec_id == AV_CODEC_ID_RA_288) {
1722 st->codec->block_align = track->audio.coded_framesize;
1723 track->codec_priv.size = 0;
1725 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1726 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1727 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1728 st->codec->bit_rate = sipr_bit_rate[flavor];
1730 st->codec->block_align = track->audio.sub_packet_size;
1731 extradata_offset = 78;
1733 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1734 ret = matroska_parse_flac(s, track, &extradata_offset);
1738 track->codec_priv.size -= extradata_offset;
1740 if (codec_id == AV_CODEC_ID_NONE)
1741 av_log(matroska->ctx, AV_LOG_INFO,
1742 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1744 if (track->time_scale < 0.01)
1745 track->time_scale = 1.0;
1746 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1747 1000 * 1000 * 1000); /* 64 bit pts in ns */
1749 /* convert the delay from ns to the track timebase */
1750 track->codec_delay = av_rescale_q(track->codec_delay,
1751 (AVRational){ 1, 1000000000 },
1754 st->codec->codec_id = codec_id;
1756 if (strcmp(track->language, "und"))
1757 av_dict_set(&st->metadata, "language", track->language, 0);
1758 av_dict_set(&st->metadata, "title", track->name, 0);
1760 if (track->flag_default)
1761 st->disposition |= AV_DISPOSITION_DEFAULT;
1762 if (track->flag_forced)
1763 st->disposition |= AV_DISPOSITION_FORCED;
1765 if (!st->codec->extradata) {
1767 st->codec->extradata = extradata;
1768 st->codec->extradata_size = extradata_size;
1769 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1770 st->codec->extradata = av_mallocz(track->codec_priv.size +
1771 AV_INPUT_BUFFER_PADDING_SIZE);
1772 if (!st->codec->extradata)
1773 return AVERROR(ENOMEM);
1774 st->codec->extradata_size = track->codec_priv.size;
1775 memcpy(st->codec->extradata,
1776 track->codec_priv.data + extradata_offset,
1777 track->codec_priv.size);
1781 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1782 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1783 st->codec->codec_tag = track->video.fourcc;
1784 st->codec->width = track->video.pixel_width;
1785 st->codec->height = track->video.pixel_height;
1786 av_reduce(&st->sample_aspect_ratio.num,
1787 &st->sample_aspect_ratio.den,
1788 st->codec->height * track->video.display_width,
1789 st->codec->width * track->video.display_height,
1791 if (st->codec->codec_id != AV_CODEC_ID_H264 &&
1792 st->codec->codec_id != AV_CODEC_ID_HEVC)
1793 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1794 if (track->default_duration) {
1795 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1796 1000000000, track->default_duration, 30000);
1798 // add stream level stereo3d side data if it is a supported format
1799 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1800 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
1801 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
1805 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1806 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1807 st->codec->sample_rate = track->audio.out_samplerate;
1808 st->codec->channels = track->audio.channels;
1809 if (st->codec->codec_id != AV_CODEC_ID_AAC)
1810 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1811 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1812 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1813 if (st->codec->codec_id == AV_CODEC_ID_SSA)
1814 matroska->contains_ssa = 1;
1821 static int matroska_read_header(AVFormatContext *s)
1823 MatroskaDemuxContext *matroska = s->priv_data;
1824 EbmlList *attachments_list = &matroska->attachments;
1825 EbmlList *chapters_list = &matroska->chapters;
1826 MatroskaAttachment *attachments;
1827 MatroskaChapter *chapters;
1828 uint64_t max_start = 0;
1835 /* First read the EBML header. */
1836 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
1837 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
1838 ebml_free(ebml_syntax, &ebml);
1839 return AVERROR_INVALIDDATA;
1841 if (ebml.version > EBML_VERSION ||
1842 ebml.max_size > sizeof(uint64_t) ||
1843 ebml.id_length > sizeof(uint32_t) ||
1844 ebml.doctype_version > 3) {
1845 av_log(matroska->ctx, AV_LOG_ERROR,
1846 "EBML header using unsupported features\n"
1847 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1848 ebml.version, ebml.doctype, ebml.doctype_version);
1849 ebml_free(ebml_syntax, &ebml);
1850 return AVERROR_PATCHWELCOME;
1852 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1853 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1855 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1856 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1857 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1858 ebml_free(ebml_syntax, &ebml);
1859 return AVERROR_INVALIDDATA;
1862 ebml_free(ebml_syntax, &ebml);
1864 /* The next thing is a segment. */
1865 pos = avio_tell(matroska->ctx->pb);
1866 res = ebml_parse(matroska, matroska_segments, matroska);
1867 // try resyncing until we find a EBML_STOP type element.
1869 res = matroska_resync(matroska, pos);
1872 pos = avio_tell(matroska->ctx->pb);
1873 res = ebml_parse(matroska, matroska_segment, matroska);
1875 matroska_execute_seekhead(matroska);
1877 if (!matroska->time_scale)
1878 matroska->time_scale = 1000000;
1879 if (matroska->duration)
1880 matroska->ctx->duration = matroska->duration * matroska->time_scale *
1881 1000 / AV_TIME_BASE;
1882 av_dict_set(&s->metadata, "title", matroska->title, 0);
1884 res = matroska_parse_tracks(s);
1888 attachments = attachments_list->elem;
1889 for (j = 0; j < attachments_list->nb_elem; j++) {
1890 if (!(attachments[j].filename && attachments[j].mime &&
1891 attachments[j].bin.data && attachments[j].bin.size > 0)) {
1892 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1894 AVStream *st = avformat_new_stream(s, NULL);
1897 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
1898 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
1899 st->codec->codec_id = AV_CODEC_ID_NONE;
1901 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1902 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
1903 strlen(ff_mkv_image_mime_tags[i].str))) {
1904 st->codec->codec_id = ff_mkv_image_mime_tags[i].id;
1909 attachments[j].stream = st;
1911 if (st->codec->codec_id != AV_CODEC_ID_NONE) {
1912 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
1913 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1915 av_init_packet(&st->attached_pic);
1916 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
1918 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
1919 st->attached_pic.stream_index = st->index;
1920 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
1922 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1923 st->codec->extradata = av_malloc(attachments[j].bin.size);
1924 if (!st->codec->extradata)
1927 st->codec->extradata_size = attachments[j].bin.size;
1928 memcpy(st->codec->extradata, attachments[j].bin.data,
1929 attachments[j].bin.size);
1931 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1932 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
1933 strlen(ff_mkv_mime_tags[i].str))) {
1934 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1942 chapters = chapters_list->elem;
1943 for (i = 0; i < chapters_list->nb_elem; i++)
1944 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
1945 (max_start == 0 || chapters[i].start > max_start)) {
1946 chapters[i].chapter =
1947 avpriv_new_chapter(s, chapters[i].uid,
1948 (AVRational) { 1, 1000000000 },
1949 chapters[i].start, chapters[i].end,
1951 av_dict_set(&chapters[i].chapter->metadata,
1952 "title", chapters[i].title, 0);
1953 max_start = chapters[i].start;
1956 matroska_convert_tags(s);
1962 * Put one packet in an application-supplied AVPacket struct.
1963 * Returns 0 on success or -1 on failure.
1965 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1968 if (matroska->num_packets > 0) {
1969 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1970 av_free(matroska->packets[0]);
1971 if (matroska->num_packets > 1) {
1973 memmove(&matroska->packets[0], &matroska->packets[1],
1974 (matroska->num_packets - 1) * sizeof(AVPacket *));
1975 newpackets = av_realloc(matroska->packets,
1976 (matroska->num_packets - 1) *
1977 sizeof(AVPacket *));
1979 matroska->packets = newpackets;
1981 av_freep(&matroska->packets);
1982 matroska->prev_pkt = NULL;
1984 matroska->num_packets--;
1992 * Free all packets in our internal queue.
1994 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1996 matroska->prev_pkt = NULL;
1997 if (matroska->packets) {
1999 for (n = 0; n < matroska->num_packets; n++) {
2000 av_packet_unref(matroska->packets[n]);
2001 av_free(matroska->packets[n]);
2003 av_freep(&matroska->packets);
2004 matroska->num_packets = 0;
2008 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2009 int *buf_size, int type,
2010 uint32_t **lace_buf, int *laces)
2012 int res = 0, n, size = *buf_size;
2013 uint8_t *data = *buf;
2014 uint32_t *lace_size;
2018 *lace_buf = av_mallocz(sizeof(int));
2020 return AVERROR(ENOMEM);
2022 *lace_buf[0] = size;
2030 lace_size = av_mallocz(*laces * sizeof(int));
2032 return AVERROR(ENOMEM);
2035 case 0x1: /* Xiph lacing */
2039 for (n = 0; res == 0 && n < *laces - 1; n++) {
2046 lace_size[n] += temp;
2052 total += lace_size[n];
2054 if (size <= total) {
2055 res = AVERROR_INVALIDDATA;
2059 lace_size[n] = size - total;
2063 case 0x2: /* fixed-size lacing */
2064 if (size % (*laces)) {
2065 res = AVERROR_INVALIDDATA;
2068 for (n = 0; n < *laces; n++)
2069 lace_size[n] = size / *laces;
2072 case 0x3: /* EBML lacing */
2076 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2078 av_log(matroska->ctx, AV_LOG_INFO,
2079 "EBML block data error\n");
2085 total = lace_size[0] = num;
2086 for (n = 1; res == 0 && n < *laces - 1; n++) {
2089 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2091 av_log(matroska->ctx, AV_LOG_INFO,
2092 "EBML block data error\n");
2098 lace_size[n] = lace_size[n - 1] + snum;
2099 total += lace_size[n];
2101 if (size <= total) {
2102 res = AVERROR_INVALIDDATA;
2105 lace_size[*laces - 1] = size - total;
2111 *lace_buf = lace_size;
2117 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2118 MatroskaTrack *track, AVStream *st,
2119 uint8_t *data, int size, uint64_t timecode,
2120 uint64_t duration, int64_t pos)
2122 int a = st->codec->block_align;
2123 int sps = track->audio.sub_packet_size;
2124 int cfs = track->audio.coded_framesize;
2125 int h = track->audio.sub_packet_h;
2126 int y = track->audio.sub_packet_cnt;
2127 int w = track->audio.frame_size;
2130 if (!track->audio.pkt_cnt) {
2131 if (track->audio.sub_packet_cnt == 0)
2132 track->audio.buf_timecode = timecode;
2133 if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2134 if (size < cfs * h / 2) {
2135 av_log(matroska->ctx, AV_LOG_ERROR,
2136 "Corrupt int4 RM-style audio packet size\n");
2137 return AVERROR_INVALIDDATA;
2139 for (x = 0; x < h / 2; x++)
2140 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2141 data + x * cfs, cfs);
2142 } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2144 av_log(matroska->ctx, AV_LOG_ERROR,
2145 "Corrupt sipr RM-style audio packet size\n");
2146 return AVERROR_INVALIDDATA;
2148 memcpy(track->audio.buf + y * w, data, w);
2150 if (size < sps * w / sps) {
2151 av_log(matroska->ctx, AV_LOG_ERROR,
2152 "Corrupt generic RM-style audio packet size\n");
2153 return AVERROR_INVALIDDATA;
2155 for (x = 0; x < w / sps; x++)
2156 memcpy(track->audio.buf +
2157 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2158 data + x * sps, sps);
2161 if (++track->audio.sub_packet_cnt >= h) {
2162 if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2163 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2164 track->audio.sub_packet_cnt = 0;
2165 track->audio.pkt_cnt = h * w / a;
2169 while (track->audio.pkt_cnt) {
2171 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2173 return AVERROR(ENOMEM);
2175 ret = av_new_packet(pkt, a);
2181 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2183 pkt->pts = track->audio.buf_timecode;
2184 track->audio.buf_timecode = AV_NOPTS_VALUE;
2186 pkt->stream_index = st->index;
2187 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2193 /* reconstruct full wavpack blocks from mangled matroska ones */
2194 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2195 uint8_t **pdst, int *size)
2197 uint8_t *dst = NULL;
2202 int ret, offset = 0;
2204 if (srclen < 12 || track->stream->codec->extradata_size < 2)
2205 return AVERROR_INVALIDDATA;
2207 ver = AV_RL16(track->stream->codec->extradata);
2209 samples = AV_RL32(src);
2213 while (srclen >= 8) {
2218 uint32_t flags = AV_RL32(src);
2219 uint32_t crc = AV_RL32(src + 4);
2223 multiblock = (flags & 0x1800) != 0x1800;
2226 ret = AVERROR_INVALIDDATA;
2229 blocksize = AV_RL32(src);
2235 if (blocksize > srclen) {
2236 ret = AVERROR_INVALIDDATA;
2240 tmp = av_realloc(dst, dstlen + blocksize + 32);
2242 ret = AVERROR(ENOMEM);
2246 dstlen += blocksize + 32;
2248 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2249 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2250 AV_WL16(dst + offset + 8, ver); // version
2251 AV_WL16(dst + offset + 10, 0); // track/index_no
2252 AV_WL32(dst + offset + 12, 0); // total samples
2253 AV_WL32(dst + offset + 16, 0); // block index
2254 AV_WL32(dst + offset + 20, samples); // number of samples
2255 AV_WL32(dst + offset + 24, flags); // flags
2256 AV_WL32(dst + offset + 28, crc); // crc
2257 memcpy(dst + offset + 32, src, blocksize); // block data
2260 srclen -= blocksize;
2261 offset += blocksize + 32;
2274 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2275 MatroskaTrack *track, AVStream *st,
2276 uint8_t *data, int pkt_size,
2277 uint64_t timecode, uint64_t duration,
2278 int64_t pos, int is_keyframe)
2280 MatroskaTrackEncoding *encodings = track->encodings.elem;
2281 uint8_t *pkt_data = data;
2282 int offset = 0, res;
2285 if (encodings && encodings->scope & 1) {
2286 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2291 if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2293 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2295 av_log(matroska->ctx, AV_LOG_ERROR,
2296 "Error parsing a wavpack block.\n");
2299 if (pkt_data != data)
2300 av_freep(&pkt_data);
2304 if (st->codec->codec_id == AV_CODEC_ID_PRORES)
2307 pkt = av_mallocz(sizeof(AVPacket));
2309 av_freep(&pkt_data);
2310 return AVERROR(ENOMEM);
2312 /* XXX: prevent data copy... */
2313 if (av_new_packet(pkt, pkt_size + offset) < 0) {
2315 av_freep(&pkt_data);
2316 return AVERROR(ENOMEM);
2319 if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
2320 uint8_t *buf = pkt->data;
2321 bytestream_put_be32(&buf, pkt_size);
2322 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2325 memcpy(pkt->data + offset, pkt_data, pkt_size);
2327 if (pkt_data != data)
2330 pkt->flags = is_keyframe;
2331 pkt->stream_index = st->index;
2333 if (track->ms_compat)
2334 pkt->dts = timecode;
2336 pkt->pts = timecode;
2338 if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE || st->codec->codec_id == AV_CODEC_ID_TEXT)
2339 pkt->duration = duration;
2340 #if FF_API_CONVERGENCE_DURATION
2341 FF_DISABLE_DEPRECATION_WARNINGS
2342 if (st->codec->codec_id == AV_CODEC_ID_TEXT)
2343 pkt->convergence_duration = duration;
2344 FF_ENABLE_DEPRECATION_WARNINGS
2347 if (st->codec->codec_id == AV_CODEC_ID_SSA)
2348 matroska_fix_ass_packet(matroska, pkt, duration);
2350 if (matroska->prev_pkt &&
2351 timecode != AV_NOPTS_VALUE &&
2352 matroska->prev_pkt->pts == timecode &&
2353 matroska->prev_pkt->stream_index == st->index &&
2354 st->codec->codec_id == AV_CODEC_ID_SSA)
2355 matroska_merge_packets(matroska->prev_pkt, pkt);
2357 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2358 matroska->prev_pkt = pkt;
2364 if (pkt_data != data)
2365 av_freep(&pkt_data);
2369 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2370 int size, int64_t pos, uint64_t cluster_time,
2371 uint64_t block_duration, int is_keyframe,
2372 int64_t cluster_pos)
2374 uint64_t timecode = AV_NOPTS_VALUE;
2375 MatroskaTrack *track;
2379 uint32_t *lace_size = NULL;
2380 int n, flags, laces = 0;
2381 uint64_t num, duration;
2383 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2384 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2390 track = matroska_find_track_by_num(matroska, num);
2391 if (!track || !track->stream) {
2392 av_log(matroska->ctx, AV_LOG_INFO,
2393 "Invalid stream %"PRIu64" or size %u\n", num, size);
2394 return AVERROR_INVALIDDATA;
2395 } else if (size <= 3)
2398 if (st->discard >= AVDISCARD_ALL)
2401 block_time = AV_RB16(data);
2405 if (is_keyframe == -1)
2406 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2408 if (cluster_time != (uint64_t) -1 &&
2409 (block_time >= 0 || cluster_time >= -block_time)) {
2410 timecode = cluster_time + block_time - track->codec_delay;
2411 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2412 timecode < track->end_timecode)
2413 is_keyframe = 0; /* overlapping subtitles are not key frame */
2415 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2419 if (matroska->skip_to_keyframe &&
2420 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2421 if (!is_keyframe || timecode < matroska->skip_to_timecode)
2423 matroska->skip_to_keyframe = 0;
2426 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2427 &lace_size, &laces);
2432 if (block_duration != AV_NOPTS_VALUE) {
2433 duration = block_duration / laces;
2434 if (block_duration != duration * laces) {
2435 av_log(matroska->ctx, AV_LOG_WARNING,
2436 "Incorrect block_duration, possibly corrupted container");
2439 duration = track->default_duration / matroska->time_scale;
2440 block_duration = duration * laces;
2443 if (timecode != AV_NOPTS_VALUE)
2444 track->end_timecode =
2445 FFMAX(track->end_timecode, timecode + block_duration);
2447 for (n = 0; n < laces; n++) {
2448 if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2449 st->codec->codec_id == AV_CODEC_ID_COOK ||
2450 st->codec->codec_id == AV_CODEC_ID_SIPR ||
2451 st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2452 st->codec->block_align && track->audio.sub_packet_size) {
2453 res = matroska_parse_rm_audio(matroska, track, st, data,
2455 timecode, duration, pos);
2459 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2460 timecode, duration, pos,
2461 !n ? is_keyframe : 0);
2466 if (timecode != AV_NOPTS_VALUE)
2467 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2468 data += lace_size[n];
2476 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2478 EbmlList *blocks_list;
2479 MatroskaBlock *blocks;
2481 res = ebml_parse(matroska,
2482 matroska_cluster_incremental_parsing,
2483 &matroska->current_cluster);
2486 if (matroska->current_cluster_pos)
2487 ebml_level_end(matroska);
2488 ebml_free(matroska_cluster, &matroska->current_cluster);
2489 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2490 matroska->current_cluster_num_blocks = 0;
2491 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2492 matroska->prev_pkt = NULL;
2493 /* sizeof the ID which was already read */
2494 if (matroska->current_id)
2495 matroska->current_cluster_pos -= 4;
2496 res = ebml_parse(matroska,
2497 matroska_clusters_incremental,
2498 &matroska->current_cluster);
2499 /* Try parsing the block again. */
2501 res = ebml_parse(matroska,
2502 matroska_cluster_incremental_parsing,
2503 &matroska->current_cluster);
2507 matroska->current_cluster_num_blocks <
2508 matroska->current_cluster.blocks.nb_elem) {
2509 blocks_list = &matroska->current_cluster.blocks;
2510 blocks = blocks_list->elem;
2512 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2513 i = blocks_list->nb_elem - 1;
2514 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2515 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2516 if (!blocks[i].non_simple)
2517 blocks[i].duration = AV_NOPTS_VALUE;
2518 res = matroska_parse_block(matroska, blocks[i].bin.data,
2519 blocks[i].bin.size, blocks[i].bin.pos,
2520 matroska->current_cluster.timecode,
2521 blocks[i].duration, is_keyframe,
2522 matroska->current_cluster_pos);
2531 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2533 MatroskaCluster cluster = { 0 };
2534 EbmlList *blocks_list;
2535 MatroskaBlock *blocks;
2539 if (!matroska->contains_ssa)
2540 return matroska_parse_cluster_incremental(matroska);
2541 pos = avio_tell(matroska->ctx->pb);
2542 matroska->prev_pkt = NULL;
2543 if (matroska->current_id)
2544 pos -= 4; /* sizeof the ID which was already read */
2545 res = ebml_parse(matroska, matroska_clusters, &cluster);
2546 blocks_list = &cluster.blocks;
2547 blocks = blocks_list->elem;
2548 for (i = 0; i < blocks_list->nb_elem && !res; i++)
2549 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2550 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2551 if (!blocks[i].non_simple)
2552 blocks[i].duration = AV_NOPTS_VALUE;
2553 res = matroska_parse_block(matroska, blocks[i].bin.data,
2554 blocks[i].bin.size, blocks[i].bin.pos,
2555 cluster.timecode, blocks[i].duration,
2558 ebml_free(matroska_cluster, &cluster);
2562 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2564 MatroskaDemuxContext *matroska = s->priv_data;
2567 while (!ret && matroska_deliver_packet(matroska, pkt)) {
2568 int64_t pos = avio_tell(matroska->ctx->pb);
2571 if (matroska_parse_cluster(matroska) < 0)
2572 ret = matroska_resync(matroska, pos);
2575 if (ret == AVERROR_INVALIDDATA && pkt->data) {
2576 pkt->flags |= AV_PKT_FLAG_CORRUPT;
2583 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2584 int64_t timestamp, int flags)
2586 MatroskaDemuxContext *matroska = s->priv_data;
2587 MatroskaTrack *tracks = NULL;
2588 AVStream *st = s->streams[stream_index];
2589 int i, index, index_sub, index_min;
2591 /* Parse the CUES now since we need the index data to seek. */
2592 if (matroska->cues_parsing_deferred) {
2593 matroska_parse_cues(matroska);
2594 matroska->cues_parsing_deferred = 0;
2597 if (!st->nb_index_entries)
2599 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2601 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2602 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
2604 matroska->current_id = 0;
2605 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2606 matroska_clear_queue(matroska);
2607 if (matroska_parse_cluster(matroska) < 0)
2612 matroska_clear_queue(matroska);
2617 tracks = matroska->tracks.elem;
2618 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2619 tracks[i].audio.pkt_cnt = 0;
2620 tracks[i].audio.sub_packet_cnt = 0;
2621 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2622 tracks[i].end_timecode = 0;
2623 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2624 tracks[i].stream->discard != AVDISCARD_ALL) {
2625 index_sub = av_index_search_timestamp(
2626 tracks[i].stream, st->index_entries[index].timestamp,
2627 AVSEEK_FLAG_BACKWARD);
2628 if (index_sub >= 0 &&
2629 st->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
2630 st->index_entries[index].timestamp -
2631 st->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
2632 index_min = index_sub;
2636 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2637 matroska->current_id = 0;
2638 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2639 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2641 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2645 static int matroska_read_close(AVFormatContext *s)
2647 MatroskaDemuxContext *matroska = s->priv_data;
2648 MatroskaTrack *tracks = matroska->tracks.elem;
2651 matroska_clear_queue(matroska);
2653 for (n = 0; n < matroska->tracks.nb_elem; n++)
2654 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2655 av_free(tracks[n].audio.buf);
2656 ebml_free(matroska_cluster, &matroska->current_cluster);
2657 ebml_free(matroska_segment, matroska);
2662 AVInputFormat ff_matroska_demuxer = {
2663 .name = "matroska,webm",
2664 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2665 .extensions = "mkv,mk3d,mka,mks",
2666 .priv_data_size = sizeof(MatroskaDemuxContext),
2667 .read_probe = matroska_probe,
2668 .read_header = matroska_read_header,
2669 .read_packet = matroska_read_packet,
2670 .read_close = matroska_read_close,
2671 .read_seek = matroska_read_seek,
2672 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"