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/
34 #include "avio_internal.h"
35 /* For ff_codec_get_id(). */
40 #include "libavcodec/bytestream.h"
41 #include "libavcodec/mpeg4audio.h"
42 #include "libavutil/intfloat.h"
43 #include "libavutil/intreadwrite.h"
44 #include "libavutil/avstring.h"
45 #include "libavutil/lzo.h"
46 #include "libavutil/dict.h"
67 typedef const struct EbmlSyntax {
76 const struct EbmlSyntax *n;
96 uint64_t doctype_version;
102 } MatroskaTrackCompression;
107 MatroskaTrackCompression compression;
108 } MatroskaTrackEncoding;
112 uint64_t display_width;
113 uint64_t display_height;
114 uint64_t pixel_width;
115 uint64_t pixel_height;
117 } MatroskaTrackVideo;
121 double out_samplerate;
125 /* real audio header (extracted from extradata) */
132 uint64_t buf_timecode;
134 } MatroskaTrackAudio;
145 uint64_t default_duration;
146 uint64_t flag_default;
147 uint64_t flag_forced;
148 MatroskaTrackVideo video;
149 MatroskaTrackAudio audio;
153 int64_t end_timecode;
164 } MatroskaAttachement;
202 MatroskaTagTarget target;
222 AVFormatContext *ctx;
226 MatroskaLevel levels[EBML_MAX_DEPTH];
234 EbmlList attachments;
240 /* byte position of the segment inside the stream */
241 int64_t segment_start;
243 /* the packet queue */
250 /* What to skip before effectively reading a packet. */
251 int skip_to_keyframe;
252 uint64_t skip_to_timecode;
254 /* File has a CUES element, but we defer parsing until it is needed. */
255 int cues_parsing_deferred;
257 int current_cluster_num_blocks;
258 int64_t current_cluster_pos;
259 MatroskaCluster current_cluster;
261 /* File has SSA subtitles which prevent incremental cluster parsing. */
263 } MatroskaDemuxContext;
272 static EbmlSyntax ebml_header[] = {
273 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
274 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
275 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
276 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
277 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
278 { EBML_ID_EBMLVERSION, EBML_NONE },
279 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
283 static EbmlSyntax ebml_syntax[] = {
284 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
288 static EbmlSyntax matroska_info[] = {
289 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
290 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
291 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
292 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
293 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
294 { MATROSKA_ID_DATEUTC, EBML_NONE },
295 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
299 static EbmlSyntax matroska_track_video[] = {
300 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
301 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
302 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
303 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
304 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
305 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) },
306 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
307 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
308 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
309 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
310 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
311 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
312 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE },
313 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
317 static EbmlSyntax matroska_track_audio[] = {
318 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
319 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
320 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
321 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
325 static EbmlSyntax matroska_track_encoding_compression[] = {
326 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
327 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
331 static EbmlSyntax matroska_track_encoding[] = {
332 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
333 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
334 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
335 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
339 static EbmlSyntax matroska_track_encodings[] = {
340 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
344 static EbmlSyntax matroska_track[] = {
345 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
346 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
347 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
348 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
349 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
350 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
351 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
352 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
353 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
354 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
355 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
356 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
357 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
358 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
359 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
360 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
361 { MATROSKA_ID_CODECNAME, EBML_NONE },
362 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
363 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
364 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
365 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
366 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
367 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
371 static EbmlSyntax matroska_tracks[] = {
372 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
376 static EbmlSyntax matroska_attachment[] = {
377 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
378 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
379 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
380 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
381 { MATROSKA_ID_FILEDESC, EBML_NONE },
385 static EbmlSyntax matroska_attachments[] = {
386 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
390 static EbmlSyntax matroska_chapter_display[] = {
391 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
392 { MATROSKA_ID_CHAPLANG, EBML_NONE },
396 static EbmlSyntax matroska_chapter_entry[] = {
397 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
398 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
399 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
400 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
401 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
402 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
403 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
404 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
408 static EbmlSyntax matroska_chapter[] = {
409 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
410 { MATROSKA_ID_EDITIONUID, EBML_NONE },
411 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
412 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
413 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
417 static EbmlSyntax matroska_chapters[] = {
418 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
422 static EbmlSyntax matroska_index_pos[] = {
423 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
424 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
425 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
429 static EbmlSyntax matroska_index_entry[] = {
430 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
431 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
435 static EbmlSyntax matroska_index[] = {
436 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
440 static EbmlSyntax matroska_simpletag[] = {
441 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
442 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
443 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
444 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
445 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
446 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
450 static EbmlSyntax matroska_tagtargets[] = {
451 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
452 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
453 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
454 { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
455 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
459 static EbmlSyntax matroska_tag[] = {
460 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
461 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
465 static EbmlSyntax matroska_tags[] = {
466 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
470 static EbmlSyntax matroska_seekhead_entry[] = {
471 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
472 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
476 static EbmlSyntax matroska_seekhead[] = {
477 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
481 static EbmlSyntax matroska_segment[] = {
482 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
483 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
484 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
485 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
486 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
487 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
488 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
489 { MATROSKA_ID_CLUSTER, EBML_STOP },
493 static EbmlSyntax matroska_segments[] = {
494 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
498 static EbmlSyntax matroska_blockgroup[] = {
499 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
500 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
501 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
502 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
503 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
507 static EbmlSyntax matroska_cluster[] = {
508 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
509 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
510 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
511 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
512 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
516 static EbmlSyntax matroska_clusters[] = {
517 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
518 { MATROSKA_ID_INFO, EBML_NONE },
519 { MATROSKA_ID_CUES, EBML_NONE },
520 { MATROSKA_ID_TAGS, EBML_NONE },
521 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
525 static EbmlSyntax matroska_cluster_incremental_parsing[] = {
526 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
527 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
528 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
529 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
530 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
531 { MATROSKA_ID_INFO, EBML_NONE },
532 { MATROSKA_ID_CUES, EBML_NONE },
533 { MATROSKA_ID_TAGS, EBML_NONE },
534 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
535 { MATROSKA_ID_CLUSTER, EBML_STOP },
539 static EbmlSyntax matroska_cluster_incremental[] = {
540 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
541 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
542 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
543 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
544 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
548 static EbmlSyntax matroska_clusters_incremental[] = {
549 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster_incremental} },
550 { MATROSKA_ID_INFO, EBML_NONE },
551 { MATROSKA_ID_CUES, EBML_NONE },
552 { MATROSKA_ID_TAGS, EBML_NONE },
553 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
557 static const char *const matroska_doctypes[] = { "matroska", "webm" };
560 * Return: Whether we reached the end of a level in the hierarchy or not.
562 static int ebml_level_end(MatroskaDemuxContext *matroska)
564 AVIOContext *pb = matroska->ctx->pb;
565 int64_t pos = avio_tell(pb);
567 if (matroska->num_levels > 0) {
568 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
569 if (pos - level->start >= level->length || matroska->current_id) {
570 matroska->num_levels--;
578 * Read: an "EBML number", which is defined as a variable-length
579 * array of bytes. The first byte indicates the length by giving a
580 * number of 0-bits followed by a one. The position of the first
581 * "one" bit inside the first byte indicates the length of this
583 * Returns: number of bytes read, < 0 on error
585 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
586 int max_size, uint64_t *number)
591 /* The first byte tells us the length in bytes - avio_r8() can normally
592 * return 0, but since that's not a valid first ebmlID byte, we can
593 * use it safely here to catch EOS. */
594 if (!(total = avio_r8(pb))) {
595 /* we might encounter EOS here */
596 if (!pb->eof_reached) {
597 int64_t pos = avio_tell(pb);
598 av_log(matroska->ctx, AV_LOG_ERROR,
599 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
601 return pb->error ? pb->error : AVERROR(EIO);
606 /* get the length of the EBML number */
607 read = 8 - ff_log2_tab[total];
608 if (read > max_size) {
609 int64_t pos = avio_tell(pb) - 1;
610 av_log(matroska->ctx, AV_LOG_ERROR,
611 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
612 (uint8_t) total, pos, pos);
613 return AVERROR_INVALIDDATA;
616 /* read out length */
617 total ^= 1 << ff_log2_tab[total];
619 total = (total << 8) | avio_r8(pb);
627 * Read a EBML length value.
628 * This needs special handling for the "unknown length" case which has multiple
631 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
634 int res = ebml_read_num(matroska, pb, 8, number);
635 if (res > 0 && *number + 1 == 1ULL << (7 * res))
636 *number = 0xffffffffffffffULL;
641 * Read the next element as an unsigned int.
642 * 0 is success, < 0 is failure.
644 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
649 return AVERROR_INVALIDDATA;
651 /* big-endian ordering; build up number */
654 *num = (*num << 8) | avio_r8(pb);
660 * Read the next element as a float.
661 * 0 is success, < 0 is failure.
663 static int ebml_read_float(AVIOContext *pb, int size, double *num)
667 } else if (size == 4) {
668 *num = av_int2float(avio_rb32(pb));
669 } else if (size == 8){
670 *num = av_int2double(avio_rb64(pb));
672 return AVERROR_INVALIDDATA;
678 * Read the next element as an ASCII string.
679 * 0 is success, < 0 is failure.
681 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
685 /* EBML strings are usually not 0-terminated, so we allocate one
686 * byte more, read the string and NULL-terminate it ourselves. */
687 if (!(res = av_malloc(size + 1)))
688 return AVERROR(ENOMEM);
689 if (avio_read(pb, (uint8_t *) res, size) != size) {
701 * Read the next element as binary data.
702 * 0 is success, < 0 is failure.
704 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
707 if (!(bin->data = av_malloc(length)))
708 return AVERROR(ENOMEM);
711 bin->pos = avio_tell(pb);
712 if (avio_read(pb, bin->data, length) != length) {
713 av_freep(&bin->data);
721 * Read the next element, but only the header. The contents
722 * are supposed to be sub-elements which can be read separately.
723 * 0 is success, < 0 is failure.
725 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
727 AVIOContext *pb = matroska->ctx->pb;
728 MatroskaLevel *level;
730 if (matroska->num_levels >= EBML_MAX_DEPTH) {
731 av_log(matroska->ctx, AV_LOG_ERROR,
732 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
733 return AVERROR(ENOSYS);
736 level = &matroska->levels[matroska->num_levels++];
737 level->start = avio_tell(pb);
738 level->length = length;
744 * Read signed/unsigned "EBML" numbers.
745 * Return: number of bytes processed, < 0 on error
747 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
748 uint8_t *data, uint32_t size, uint64_t *num)
751 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
752 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
756 * Same as above, but signed.
758 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
759 uint8_t *data, uint32_t size, int64_t *num)
764 /* read as unsigned number first */
765 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
768 /* make signed (weird way) */
769 *num = unum - ((1LL << (7*res - 1)) - 1);
774 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
775 EbmlSyntax *syntax, void *data);
777 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
778 uint32_t id, void *data)
781 for (i=0; syntax[i].id; i++)
782 if (id == syntax[i].id)
784 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
785 matroska->num_levels > 0 &&
786 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
787 return 0; // we reached the end of an unknown size cluster
788 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
789 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
790 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
791 return AVERROR_INVALIDDATA;
793 return ebml_parse_elem(matroska, &syntax[i], data);
796 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
799 if (!matroska->current_id) {
801 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
804 matroska->current_id = id | 1 << 7*res;
806 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
809 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
814 for (i=0; syntax[i].id; i++)
815 switch (syntax[i].type) {
817 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
820 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
824 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
828 while (!res && !ebml_level_end(matroska))
829 res = ebml_parse(matroska, syntax, data);
834 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
835 EbmlSyntax *syntax, void *data)
837 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
840 // max. 16 MB for strings
841 [EBML_STR] = 0x1000000,
842 [EBML_UTF8] = 0x1000000,
843 // max. 256 MB for binary data
844 [EBML_BIN] = 0x10000000,
845 // no limits for anything else
847 AVIOContext *pb = matroska->ctx->pb;
848 uint32_t id = syntax->id;
853 data = (char *)data + syntax->data_offset;
854 if (syntax->list_elem_size) {
855 EbmlList *list = data;
856 newelem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
858 return AVERROR(ENOMEM);
859 list->elem = newelem;
860 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
861 memset(data, 0, syntax->list_elem_size);
865 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
866 matroska->current_id = 0;
867 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
869 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
870 av_log(matroska->ctx, AV_LOG_ERROR,
871 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
872 length, max_lengths[syntax->type], syntax->type);
873 return AVERROR_INVALIDDATA;
877 switch (syntax->type) {
878 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
879 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
881 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
882 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
883 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
885 if (id == MATROSKA_ID_SEGMENT)
886 matroska->segment_start = avio_tell(matroska->ctx->pb);
887 return ebml_parse_nest(matroska, syntax->def.n, data);
888 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
889 case EBML_STOP: return 1;
890 default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
892 if (res == AVERROR_INVALIDDATA)
893 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
894 else if (res == AVERROR(EIO))
895 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
899 static void ebml_free(EbmlSyntax *syntax, void *data)
902 for (i=0; syntax[i].id; i++) {
903 void *data_off = (char *)data + syntax[i].data_offset;
904 switch (syntax[i].type) {
906 case EBML_UTF8: av_freep(data_off); break;
907 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
909 if (syntax[i].list_elem_size) {
910 EbmlList *list = data_off;
911 char *ptr = list->elem;
912 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
913 ebml_free(syntax[i].def.n, ptr);
916 ebml_free(syntax[i].def.n, data_off);
926 static int matroska_probe(AVProbeData *p)
929 int len_mask = 0x80, size = 1, n = 1, i;
932 if (AV_RB32(p->buf) != EBML_ID_HEADER)
935 /* length of header */
937 while (size <= 8 && !(total & len_mask)) {
943 total &= (len_mask - 1);
945 total = (total << 8) | p->buf[4 + n++];
947 /* Does the probe data contain the whole header? */
948 if (p->buf_size < 4 + size + total)
951 /* The header should contain a known document type. For now,
952 * we don't parse the whole header but simply check for the
953 * availability of that array of characters inside the header.
954 * Not fully fool-proof, but good enough. */
955 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
956 int probelen = strlen(matroska_doctypes[i]);
957 if (total < probelen)
959 for (n = 4+size; n <= 4+size+total-probelen; n++)
960 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
961 return AVPROBE_SCORE_MAX;
964 // probably valid EBML header but no recognized doctype
965 return AVPROBE_SCORE_MAX/2;
968 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
971 MatroskaTrack *tracks = matroska->tracks.elem;
974 for (i=0; i < matroska->tracks.nb_elem; i++)
975 if (tracks[i].num == num)
978 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
982 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
983 MatroskaTrack *track)
985 MatroskaTrackEncoding *encodings = track->encodings.elem;
986 uint8_t* data = *buf;
987 int isize = *buf_size;
988 uint8_t* pkt_data = NULL;
989 uint8_t av_unused *newpktdata;
990 int pkt_size = isize;
994 if (pkt_size >= 10000000)
995 return AVERROR_INVALIDDATA;
997 switch (encodings[0].compression.algo) {
998 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: {
999 int header_size = encodings[0].compression.settings.size;
1000 uint8_t *header = encodings[0].compression.settings.data;
1005 pkt_size = isize + header_size;
1006 pkt_data = av_malloc(pkt_size);
1008 return AVERROR(ENOMEM);
1010 memcpy(pkt_data, header, header_size);
1011 memcpy(pkt_data + header_size, data, isize);
1015 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1017 olen = pkt_size *= 3;
1018 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1020 result = AVERROR(ENOMEM);
1023 pkt_data = newpktdata;
1024 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1025 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
1027 result = AVERROR_INVALIDDATA;
1034 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
1035 z_stream zstream = {0};
1036 if (inflateInit(&zstream) != Z_OK)
1038 zstream.next_in = data;
1039 zstream.avail_in = isize;
1042 newpktdata = av_realloc(pkt_data, pkt_size);
1044 inflateEnd(&zstream);
1047 pkt_data = newpktdata;
1048 zstream.avail_out = pkt_size - zstream.total_out;
1049 zstream.next_out = pkt_data + zstream.total_out;
1050 result = inflate(&zstream, Z_NO_FLUSH);
1051 } while (result==Z_OK && pkt_size<10000000);
1052 pkt_size = zstream.total_out;
1053 inflateEnd(&zstream);
1054 if (result != Z_STREAM_END) {
1055 if (result == Z_MEM_ERROR)
1056 result = AVERROR(ENOMEM);
1058 result = AVERROR_INVALIDDATA;
1065 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
1066 bz_stream bzstream = {0};
1067 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1069 bzstream.next_in = data;
1070 bzstream.avail_in = isize;
1073 newpktdata = av_realloc(pkt_data, pkt_size);
1075 BZ2_bzDecompressEnd(&bzstream);
1078 pkt_data = newpktdata;
1079 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1080 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1081 result = BZ2_bzDecompress(&bzstream);
1082 } while (result==BZ_OK && pkt_size<10000000);
1083 pkt_size = bzstream.total_out_lo32;
1084 BZ2_bzDecompressEnd(&bzstream);
1085 if (result != BZ_STREAM_END) {
1086 if (result == BZ_MEM_ERROR)
1087 result = AVERROR(ENOMEM);
1089 result = AVERROR_INVALIDDATA;
1096 return AVERROR_INVALIDDATA;
1100 *buf_size = pkt_size;
1107 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1108 AVPacket *pkt, uint64_t display_duration)
1110 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
1111 for (; *ptr!=',' && ptr<end-1; ptr++);
1114 for (; *ptr!=',' && ptr<end-1; ptr++);
1116 int64_t end_pts = pkt->pts + display_duration;
1117 int sc = matroska->time_scale * pkt->pts / 10000000;
1118 int ec = matroska->time_scale * end_pts / 10000000;
1119 int sh, sm, ss, eh, em, es, len;
1120 sh = sc/360000; sc -= 360000*sh;
1121 sm = sc/ 6000; sc -= 6000*sm;
1122 ss = sc/ 100; sc -= 100*ss;
1123 eh = ec/360000; ec -= 360000*eh;
1124 em = ec/ 6000; ec -= 6000*em;
1125 es = ec/ 100; ec -= 100*es;
1127 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1128 if (!(line = av_malloc(len)))
1130 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1131 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1134 pkt->size = strlen(line);
1138 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1140 int old_size = out->size;
1141 int ret = av_grow_packet(out, in->size);
1145 memcpy(out->data + old_size, in->data, in->size);
1152 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1153 AVDictionary **metadata, char *prefix)
1155 MatroskaTag *tags = list->elem;
1159 for (i=0; i < list->nb_elem; i++) {
1160 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1162 if (!tags[i].name) {
1163 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1166 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1167 else av_strlcpy(key, tags[i].name, sizeof(key));
1168 if (tags[i].def || !lang) {
1169 av_dict_set(metadata, key, tags[i].string, 0);
1170 if (tags[i].sub.nb_elem)
1171 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1174 av_strlcat(key, "-", sizeof(key));
1175 av_strlcat(key, lang, sizeof(key));
1176 av_dict_set(metadata, key, tags[i].string, 0);
1177 if (tags[i].sub.nb_elem)
1178 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1181 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1184 static void matroska_convert_tags(AVFormatContext *s)
1186 MatroskaDemuxContext *matroska = s->priv_data;
1187 MatroskaTags *tags = matroska->tags.elem;
1190 for (i=0; i < matroska->tags.nb_elem; i++) {
1191 if (tags[i].target.attachuid) {
1192 MatroskaAttachement *attachment = matroska->attachments.elem;
1193 for (j=0; j<matroska->attachments.nb_elem; j++)
1194 if (attachment[j].uid == tags[i].target.attachuid
1195 && attachment[j].stream)
1196 matroska_convert_tag(s, &tags[i].tag,
1197 &attachment[j].stream->metadata, NULL);
1198 } else if (tags[i].target.chapteruid) {
1199 MatroskaChapter *chapter = matroska->chapters.elem;
1200 for (j=0; j<matroska->chapters.nb_elem; j++)
1201 if (chapter[j].uid == tags[i].target.chapteruid
1202 && chapter[j].chapter)
1203 matroska_convert_tag(s, &tags[i].tag,
1204 &chapter[j].chapter->metadata, NULL);
1205 } else if (tags[i].target.trackuid) {
1206 MatroskaTrack *track = matroska->tracks.elem;
1207 for (j=0; j<matroska->tracks.nb_elem; j++)
1208 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1209 matroska_convert_tag(s, &tags[i].tag,
1210 &track[j].stream->metadata, NULL);
1212 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1213 tags[i].target.type);
1218 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
1220 EbmlList *seekhead_list = &matroska->seekhead;
1221 MatroskaSeekhead *seekhead = seekhead_list->elem;
1222 uint32_t level_up = matroska->level_up;
1223 int64_t before_pos = avio_tell(matroska->ctx->pb);
1224 uint32_t saved_id = matroska->current_id;
1225 MatroskaLevel level;
1229 if (idx >= seekhead_list->nb_elem
1230 || seekhead[idx].id == MATROSKA_ID_SEEKHEAD
1231 || seekhead[idx].id == MATROSKA_ID_CLUSTER)
1235 offset = seekhead[idx].pos + matroska->segment_start;
1236 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1237 /* We don't want to lose our seekhead level, so we add
1238 * a dummy. This is a crude hack. */
1239 if (matroska->num_levels == EBML_MAX_DEPTH) {
1240 av_log(matroska->ctx, AV_LOG_INFO,
1241 "Max EBML element depth (%d) reached, "
1242 "cannot parse further.\n", EBML_MAX_DEPTH);
1243 ret = AVERROR_INVALIDDATA;
1246 level.length = (uint64_t)-1;
1247 matroska->levels[matroska->num_levels] = level;
1248 matroska->num_levels++;
1249 matroska->current_id = 0;
1251 ret = ebml_parse(matroska, matroska_segment, matroska);
1253 /* remove dummy level */
1254 while (matroska->num_levels) {
1255 uint64_t length = matroska->levels[--matroska->num_levels].length;
1256 if (length == (uint64_t)-1)
1262 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1263 matroska->level_up = level_up;
1264 matroska->current_id = saved_id;
1269 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1271 EbmlList *seekhead_list = &matroska->seekhead;
1272 int64_t before_pos = avio_tell(matroska->ctx->pb);
1275 // we should not do any seeking in the streaming case
1276 if (!matroska->ctx->pb->seekable ||
1277 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1280 for (i = 0; i < seekhead_list->nb_elem; i++) {
1281 MatroskaSeekhead *seekhead = seekhead_list->elem;
1282 if (seekhead[i].pos <= before_pos)
1285 // defer cues parsing until we actually need cue data.
1286 if (seekhead[i].id == MATROSKA_ID_CUES) {
1287 matroska->cues_parsing_deferred = 1;
1291 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1296 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1297 EbmlList *seekhead_list = &matroska->seekhead;
1298 MatroskaSeekhead *seekhead = seekhead_list->elem;
1299 EbmlList *index_list;
1300 MatroskaIndex *index;
1301 int index_scale = 1;
1304 for (i = 0; i < seekhead_list->nb_elem; i++)
1305 if (seekhead[i].id == MATROSKA_ID_CUES)
1307 assert(i <= seekhead_list->nb_elem);
1309 matroska_parse_seekhead_entry(matroska, i);
1311 index_list = &matroska->index;
1312 index = index_list->elem;
1313 if (index_list->nb_elem
1314 && index[0].time > 1E14/matroska->time_scale) {
1315 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1316 index_scale = matroska->time_scale;
1318 for (i = 0; i < index_list->nb_elem; i++) {
1319 EbmlList *pos_list = &index[i].pos;
1320 MatroskaIndexPos *pos = pos_list->elem;
1321 for (j = 0; j < pos_list->nb_elem; j++) {
1322 MatroskaTrack *track = matroska_find_track_by_num(matroska, pos[j].track);
1323 if (track && track->stream)
1324 av_add_index_entry(track->stream,
1325 pos[j].pos + matroska->segment_start,
1326 index[i].time/index_scale, 0, 0,
1332 static int matroska_aac_profile(char *codec_id)
1334 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1337 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1338 if (strstr(codec_id, aac_profiles[profile]))
1343 static int matroska_aac_sri(int samplerate)
1347 for (sri=0; sri<FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1348 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1353 static int matroska_read_header(AVFormatContext *s)
1355 MatroskaDemuxContext *matroska = s->priv_data;
1356 EbmlList *attachements_list = &matroska->attachments;
1357 MatroskaAttachement *attachements;
1358 EbmlList *chapters_list = &matroska->chapters;
1359 MatroskaChapter *chapters;
1360 MatroskaTrack *tracks;
1361 uint64_t max_start = 0;
1368 /* First read the EBML header. */
1369 if (ebml_parse(matroska, ebml_syntax, &ebml)
1370 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1371 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) {
1372 av_log(matroska->ctx, AV_LOG_ERROR,
1373 "EBML header using unsupported features\n"
1374 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1375 ebml.version, ebml.doctype, ebml.doctype_version);
1376 ebml_free(ebml_syntax, &ebml);
1377 return AVERROR_PATCHWELCOME;
1379 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1380 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1382 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1383 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1384 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1385 ebml_free(ebml_syntax, &ebml);
1386 return AVERROR_INVALIDDATA;
1389 ebml_free(ebml_syntax, &ebml);
1391 /* The next thing is a segment. */
1392 if ((res = ebml_parse(matroska, matroska_segments, matroska)) < 0)
1394 matroska_execute_seekhead(matroska);
1396 if (!matroska->time_scale)
1397 matroska->time_scale = 1000000;
1398 if (matroska->duration)
1399 matroska->ctx->duration = matroska->duration * matroska->time_scale
1400 * 1000 / AV_TIME_BASE;
1401 av_dict_set(&s->metadata, "title", matroska->title, 0);
1403 tracks = matroska->tracks.elem;
1404 for (i=0; i < matroska->tracks.nb_elem; i++) {
1405 MatroskaTrack *track = &tracks[i];
1406 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1407 EbmlList *encodings_list = &tracks->encodings;
1408 MatroskaTrackEncoding *encodings = encodings_list->elem;
1409 uint8_t *extradata = NULL;
1410 int extradata_size = 0;
1411 int extradata_offset = 0;
1414 /* Apply some sanity checks. */
1415 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1416 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1417 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1418 av_log(matroska->ctx, AV_LOG_INFO,
1419 "Unknown or unsupported track type %"PRIu64"\n",
1423 if (track->codec_id == NULL)
1426 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1427 if (!track->default_duration && track->video.frame_rate > 0)
1428 track->default_duration = 1000000000/track->video.frame_rate;
1429 if (!track->video.display_width)
1430 track->video.display_width = track->video.pixel_width;
1431 if (!track->video.display_height)
1432 track->video.display_height = track->video.pixel_height;
1433 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1434 if (!track->audio.out_samplerate)
1435 track->audio.out_samplerate = track->audio.samplerate;
1437 if (encodings_list->nb_elem > 1) {
1438 av_log(matroska->ctx, AV_LOG_ERROR,
1439 "Multiple combined encodings not supported");
1440 } else if (encodings_list->nb_elem == 1) {
1441 if (encodings[0].type ||
1444 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1447 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1450 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1452 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP)) {
1453 encodings[0].scope = 0;
1454 av_log(matroska->ctx, AV_LOG_ERROR,
1455 "Unsupported encoding type");
1456 } else if (track->codec_priv.size && encodings[0].scope&2) {
1457 uint8_t *codec_priv = track->codec_priv.data;
1458 int ret = matroska_decode_buffer(&track->codec_priv.data,
1459 &track->codec_priv.size,
1462 track->codec_priv.data = NULL;
1463 track->codec_priv.size = 0;
1464 av_log(matroska->ctx, AV_LOG_ERROR,
1465 "Failed to decode codec private data\n");
1468 if (codec_priv != track->codec_priv.data)
1469 av_free(codec_priv);
1473 for(j=0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++){
1474 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1475 strlen(ff_mkv_codec_tags[j].str))){
1476 codec_id= ff_mkv_codec_tags[j].id;
1481 st = track->stream = avformat_new_stream(s, NULL);
1483 return AVERROR(ENOMEM);
1485 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1486 && track->codec_priv.size >= 40
1487 && track->codec_priv.data != NULL) {
1488 track->ms_compat = 1;
1489 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1490 codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc);
1491 extradata_offset = 40;
1492 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1493 && track->codec_priv.size >= 14
1494 && track->codec_priv.data != NULL) {
1496 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1497 AVIO_FLAG_READ, NULL, NULL, NULL, NULL);
1498 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1501 codec_id = st->codec->codec_id;
1502 extradata_offset = FFMIN(track->codec_priv.size, 18);
1503 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1504 && (track->codec_priv.size >= 86)
1505 && (track->codec_priv.data != NULL)) {
1506 track->video.fourcc = AV_RL32(track->codec_priv.data);
1507 codec_id=ff_codec_get_id(ff_codec_movvideo_tags, track->video.fourcc);
1508 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1509 switch (track->audio.bitdepth) {
1510 case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
1511 case 24: codec_id = AV_CODEC_ID_PCM_S24BE; break;
1512 case 32: codec_id = AV_CODEC_ID_PCM_S32BE; break;
1514 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1515 switch (track->audio.bitdepth) {
1516 case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
1517 case 24: codec_id = AV_CODEC_ID_PCM_S24LE; break;
1518 case 32: codec_id = AV_CODEC_ID_PCM_S32LE; break;
1520 } else if (codec_id==AV_CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1521 codec_id = AV_CODEC_ID_PCM_F64LE;
1522 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1523 int profile = matroska_aac_profile(track->codec_id);
1524 int sri = matroska_aac_sri(track->audio.samplerate);
1525 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1526 if (extradata == NULL)
1527 return AVERROR(ENOMEM);
1528 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1529 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1530 if (strstr(track->codec_id, "SBR")) {
1531 sri = matroska_aac_sri(track->audio.out_samplerate);
1532 extradata[2] = 0x56;
1533 extradata[3] = 0xE5;
1534 extradata[4] = 0x80 | (sri<<3);
1538 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1539 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1540 Create the "atom size", "tag", and "tag version" fields the
1541 decoder expects manually. */
1542 extradata_size = 12 + track->codec_priv.size;
1543 extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1544 if (extradata == NULL)
1545 return AVERROR(ENOMEM);
1546 AV_WB32(extradata, extradata_size);
1547 memcpy(&extradata[4], "alac", 4);
1548 AV_WB32(&extradata[8], 0);
1549 memcpy(&extradata[12], track->codec_priv.data,
1550 track->codec_priv.size);
1551 } else if (codec_id == AV_CODEC_ID_TTA) {
1552 extradata_size = 30;
1553 extradata = av_mallocz(extradata_size);
1554 if (extradata == NULL)
1555 return AVERROR(ENOMEM);
1556 ffio_init_context(&b, extradata, extradata_size, 1,
1557 NULL, NULL, NULL, NULL);
1558 avio_write(&b, "TTA1", 4);
1560 avio_wl16(&b, track->audio.channels);
1561 avio_wl16(&b, track->audio.bitdepth);
1562 avio_wl32(&b, track->audio.out_samplerate);
1563 avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1564 } else if (codec_id == AV_CODEC_ID_RV10 || codec_id == AV_CODEC_ID_RV20 ||
1565 codec_id == AV_CODEC_ID_RV30 || codec_id == AV_CODEC_ID_RV40) {
1566 extradata_offset = 26;
1567 } else if (codec_id == AV_CODEC_ID_RA_144) {
1568 track->audio.out_samplerate = 8000;
1569 track->audio.channels = 1;
1570 } else if (codec_id == AV_CODEC_ID_RA_288 || codec_id == AV_CODEC_ID_COOK ||
1571 codec_id == AV_CODEC_ID_ATRAC3 || codec_id == AV_CODEC_ID_SIPR) {
1573 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
1574 0, NULL, NULL, NULL, NULL);
1576 flavor = avio_rb16(&b);
1577 track->audio.coded_framesize = avio_rb32(&b);
1579 track->audio.sub_packet_h = avio_rb16(&b);
1580 track->audio.frame_size = avio_rb16(&b);
1581 track->audio.sub_packet_size = avio_rb16(&b);
1582 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1583 if (codec_id == AV_CODEC_ID_RA_288) {
1584 st->codec->block_align = track->audio.coded_framesize;
1585 track->codec_priv.size = 0;
1587 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1588 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1589 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1590 st->codec->bit_rate = sipr_bit_rate[flavor];
1592 st->codec->block_align = track->audio.sub_packet_size;
1593 extradata_offset = 78;
1596 track->codec_priv.size -= extradata_offset;
1598 if (codec_id == AV_CODEC_ID_NONE)
1599 av_log(matroska->ctx, AV_LOG_INFO,
1600 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1602 if (track->time_scale < 0.01)
1603 track->time_scale = 1.0;
1604 avpriv_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1606 st->codec->codec_id = codec_id;
1608 if (strcmp(track->language, "und"))
1609 av_dict_set(&st->metadata, "language", track->language, 0);
1610 av_dict_set(&st->metadata, "title", track->name, 0);
1612 if (track->flag_default)
1613 st->disposition |= AV_DISPOSITION_DEFAULT;
1614 if (track->flag_forced)
1615 st->disposition |= AV_DISPOSITION_FORCED;
1617 if (!st->codec->extradata) {
1619 st->codec->extradata = extradata;
1620 st->codec->extradata_size = extradata_size;
1621 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1622 st->codec->extradata = av_mallocz(track->codec_priv.size +
1623 FF_INPUT_BUFFER_PADDING_SIZE);
1624 if(st->codec->extradata == NULL)
1625 return AVERROR(ENOMEM);
1626 st->codec->extradata_size = track->codec_priv.size;
1627 memcpy(st->codec->extradata,
1628 track->codec_priv.data + extradata_offset,
1629 track->codec_priv.size);
1633 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1634 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1635 st->codec->codec_tag = track->video.fourcc;
1636 st->codec->width = track->video.pixel_width;
1637 st->codec->height = track->video.pixel_height;
1638 av_reduce(&st->sample_aspect_ratio.num,
1639 &st->sample_aspect_ratio.den,
1640 st->codec->height * track->video.display_width,
1641 st->codec-> width * track->video.display_height,
1643 if (st->codec->codec_id != AV_CODEC_ID_H264)
1644 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1645 if (track->default_duration) {
1646 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1647 1000000000, track->default_duration, 30000);
1648 #if FF_API_R_FRAME_RATE
1649 st->r_frame_rate = st->avg_frame_rate;
1652 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1653 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1654 st->codec->sample_rate = track->audio.out_samplerate;
1655 st->codec->channels = track->audio.channels;
1656 if (st->codec->codec_id != AV_CODEC_ID_AAC)
1657 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1658 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1659 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1660 if (st->codec->codec_id == AV_CODEC_ID_SSA)
1661 matroska->contains_ssa = 1;
1665 attachements = attachements_list->elem;
1666 for (j=0; j<attachements_list->nb_elem; j++) {
1667 if (!(attachements[j].filename && attachements[j].mime &&
1668 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1669 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1671 AVStream *st = avformat_new_stream(s, NULL);
1674 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
1675 av_dict_set(&st->metadata, "mimetype", attachements[j].mime, 0);
1676 st->codec->codec_id = AV_CODEC_ID_NONE;
1677 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1678 st->codec->extradata = av_malloc(attachements[j].bin.size);
1679 if(st->codec->extradata == NULL)
1681 st->codec->extradata_size = attachements[j].bin.size;
1682 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1684 for (i=0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1685 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1686 strlen(ff_mkv_mime_tags[i].str))) {
1687 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1691 attachements[j].stream = st;
1695 chapters = chapters_list->elem;
1696 for (i=0; i<chapters_list->nb_elem; i++)
1697 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1698 && (max_start==0 || chapters[i].start > max_start)) {
1699 chapters[i].chapter =
1700 avpriv_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1701 chapters[i].start, chapters[i].end,
1703 av_dict_set(&chapters[i].chapter->metadata,
1704 "title", chapters[i].title, 0);
1705 max_start = chapters[i].start;
1708 matroska_convert_tags(s);
1714 * Put one packet in an application-supplied AVPacket struct.
1715 * Returns 0 on success or -1 on failure.
1717 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1720 if (matroska->num_packets > 0) {
1721 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1722 av_free(matroska->packets[0]);
1723 if (matroska->num_packets > 1) {
1725 memmove(&matroska->packets[0], &matroska->packets[1],
1726 (matroska->num_packets - 1) * sizeof(AVPacket *));
1727 newpackets = av_realloc(matroska->packets,
1728 (matroska->num_packets - 1) * sizeof(AVPacket *));
1730 matroska->packets = newpackets;
1732 av_freep(&matroska->packets);
1733 matroska->prev_pkt = NULL;
1735 matroska->num_packets--;
1743 * Free all packets in our internal queue.
1745 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1747 matroska->prev_pkt = NULL;
1748 if (matroska->packets) {
1750 for (n = 0; n < matroska->num_packets; n++) {
1751 av_free_packet(matroska->packets[n]);
1752 av_free(matroska->packets[n]);
1754 av_freep(&matroska->packets);
1755 matroska->num_packets = 0;
1759 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
1761 uint32_t **lace_buf, int *laces)
1764 uint8_t *data = *buf;
1765 uint32_t *lace_size;
1769 *lace_buf = av_mallocz(sizeof(int));
1771 return AVERROR(ENOMEM);
1773 *lace_buf[0] = size;
1781 lace_size = av_mallocz(*laces * sizeof(int));
1783 return AVERROR(ENOMEM);
1786 case 0x1: /* Xiph lacing */ {
1789 for (n = 0; res == 0 && n < *laces - 1; n++) {
1796 lace_size[n] += temp;
1802 total += lace_size[n];
1804 if (size <= total) {
1805 res = AVERROR_INVALIDDATA;
1809 lace_size[n] = size - total;
1813 case 0x2: /* fixed-size lacing */
1814 if (size % (*laces)) {
1815 res = AVERROR_INVALIDDATA;
1818 for (n = 0; n < *laces; n++)
1819 lace_size[n] = size / *laces;
1822 case 0x3: /* EBML lacing */ {
1825 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1827 av_log(matroska->ctx, AV_LOG_INFO,
1828 "EBML block data error\n");
1834 total = lace_size[0] = num;
1835 for (n = 1; res == 0 && n < *laces - 1; n++) {
1838 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1840 av_log(matroska->ctx, AV_LOG_INFO,
1841 "EBML block data error\n");
1847 lace_size[n] = lace_size[n - 1] + snum;
1848 total += lace_size[n];
1850 if (size <= total) {
1851 res = AVERROR_INVALIDDATA;
1854 lace_size[*laces - 1] = size - total;
1860 *lace_buf = lace_size;
1865 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
1866 MatroskaTrack *track,
1868 uint8_t *data, int size,
1869 uint64_t timecode, uint64_t duration,
1872 int a = st->codec->block_align;
1873 int sps = track->audio.sub_packet_size;
1874 int cfs = track->audio.coded_framesize;
1875 int h = track->audio.sub_packet_h;
1876 int y = track->audio.sub_packet_cnt;
1877 int w = track->audio.frame_size;
1880 if (!track->audio.pkt_cnt) {
1881 if (track->audio.sub_packet_cnt == 0)
1882 track->audio.buf_timecode = timecode;
1883 if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
1884 if (size < cfs * h / 2) {
1885 av_log(matroska->ctx, AV_LOG_ERROR,
1886 "Corrupt int4 RM-style audio packet size\n");
1887 return AVERROR_INVALIDDATA;
1889 for (x=0; x<h/2; x++)
1890 memcpy(track->audio.buf+x*2*w+y*cfs,
1892 } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
1894 av_log(matroska->ctx, AV_LOG_ERROR,
1895 "Corrupt sipr RM-style audio packet size\n");
1896 return AVERROR_INVALIDDATA;
1898 memcpy(track->audio.buf + y*w, data, w);
1900 if (size < sps * w / sps) {
1901 av_log(matroska->ctx, AV_LOG_ERROR,
1902 "Corrupt generic RM-style audio packet size\n");
1903 return AVERROR_INVALIDDATA;
1905 for (x=0; x<w/sps; x++)
1906 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1909 if (++track->audio.sub_packet_cnt >= h) {
1910 if (st->codec->codec_id == AV_CODEC_ID_SIPR)
1911 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
1912 track->audio.sub_packet_cnt = 0;
1913 track->audio.pkt_cnt = h*w / a;
1917 while (track->audio.pkt_cnt) {
1918 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
1919 av_new_packet(pkt, a);
1920 memcpy(pkt->data, track->audio.buf
1921 + a * (h*w / a - track->audio.pkt_cnt--), a);
1922 pkt->pts = track->audio.buf_timecode;
1923 track->audio.buf_timecode = AV_NOPTS_VALUE;
1925 pkt->stream_index = st->index;
1926 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1931 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
1932 MatroskaTrack *track,
1934 uint8_t *data, int pkt_size,
1935 uint64_t timecode, uint64_t duration,
1936 int64_t pos, int is_keyframe)
1938 MatroskaTrackEncoding *encodings = track->encodings.elem;
1939 uint8_t *pkt_data = data;
1940 int offset = 0, res;
1943 if (encodings && encodings->scope & 1) {
1944 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
1949 if (st->codec->codec_id == AV_CODEC_ID_PRORES)
1952 pkt = av_mallocz(sizeof(AVPacket));
1953 /* XXX: prevent data copy... */
1954 if (av_new_packet(pkt, pkt_size + offset) < 0) {
1956 return AVERROR(ENOMEM);
1959 if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
1960 uint8_t *buf = pkt->data;
1961 bytestream_put_be32(&buf, pkt_size);
1962 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
1965 memcpy(pkt->data + offset, pkt_data, pkt_size);
1967 if (pkt_data != data)
1970 pkt->flags = is_keyframe;
1971 pkt->stream_index = st->index;
1973 if (track->ms_compat)
1974 pkt->dts = timecode;
1976 pkt->pts = timecode;
1978 if (st->codec->codec_id == AV_CODEC_ID_TEXT)
1979 pkt->convergence_duration = duration;
1980 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
1981 pkt->duration = duration;
1983 if (st->codec->codec_id == AV_CODEC_ID_SSA)
1984 matroska_fix_ass_packet(matroska, pkt, duration);
1986 if (matroska->prev_pkt &&
1987 timecode != AV_NOPTS_VALUE &&
1988 matroska->prev_pkt->pts == timecode &&
1989 matroska->prev_pkt->stream_index == st->index &&
1990 st->codec->codec_id == AV_CODEC_ID_SSA)
1991 matroska_merge_packets(matroska->prev_pkt, pkt);
1993 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1994 matroska->prev_pkt = pkt;
2000 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2001 int size, int64_t pos, uint64_t cluster_time,
2002 uint64_t block_duration, int is_keyframe,
2003 int64_t cluster_pos)
2005 uint64_t timecode = AV_NOPTS_VALUE;
2006 MatroskaTrack *track;
2010 uint32_t *lace_size = NULL;
2011 int n, flags, laces = 0;
2012 uint64_t num, duration;
2014 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2015 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2021 track = matroska_find_track_by_num(matroska, num);
2022 if (!track || !track->stream) {
2023 av_log(matroska->ctx, AV_LOG_INFO,
2024 "Invalid stream %"PRIu64" or size %u\n", num, size);
2025 return AVERROR_INVALIDDATA;
2026 } else if (size <= 3)
2029 if (st->discard >= AVDISCARD_ALL)
2032 block_time = AV_RB16(data);
2036 if (is_keyframe == -1)
2037 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2039 if (cluster_time != (uint64_t)-1
2040 && (block_time >= 0 || cluster_time >= -block_time)) {
2041 timecode = cluster_time + block_time;
2042 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
2043 && timecode < track->end_timecode)
2044 is_keyframe = 0; /* overlapping subtitles are not key frame */
2046 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
2049 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2050 if (!is_keyframe || timecode < matroska->skip_to_timecode)
2052 matroska->skip_to_keyframe = 0;
2055 res = matroska_parse_laces(matroska, &data, size, (flags & 0x06) >> 1,
2056 &lace_size, &laces);
2061 if (block_duration != AV_NOPTS_VALUE) {
2062 duration = block_duration / laces;
2063 if (block_duration != duration * laces) {
2064 av_log(matroska->ctx, AV_LOG_WARNING,
2065 "Incorrect block_duration, possibly corrupted container");
2068 duration = track->default_duration / matroska->time_scale;
2069 block_duration = duration * laces;
2072 if (timecode != AV_NOPTS_VALUE)
2073 track->end_timecode =
2074 FFMAX(track->end_timecode, timecode + block_duration);
2076 for (n = 0; n < laces; n++) {
2077 if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2078 st->codec->codec_id == AV_CODEC_ID_COOK ||
2079 st->codec->codec_id == AV_CODEC_ID_SIPR ||
2080 st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2081 st->codec->block_align && track->audio.sub_packet_size) {
2083 res = matroska_parse_rm_audio(matroska, track, st, data, size,
2084 timecode, duration, pos);
2089 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2091 pos, !n? is_keyframe : 0);
2096 if (timecode != AV_NOPTS_VALUE)
2097 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2098 data += lace_size[n];
2099 size -= lace_size[n];
2107 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2109 EbmlList *blocks_list;
2110 MatroskaBlock *blocks;
2112 res = ebml_parse(matroska,
2113 matroska_cluster_incremental_parsing,
2114 &matroska->current_cluster);
2117 if (matroska->current_cluster_pos)
2118 ebml_level_end(matroska);
2119 ebml_free(matroska_cluster, &matroska->current_cluster);
2120 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2121 matroska->current_cluster_num_blocks = 0;
2122 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2123 matroska->prev_pkt = NULL;
2124 /* sizeof the ID which was already read */
2125 if (matroska->current_id)
2126 matroska->current_cluster_pos -= 4;
2127 res = ebml_parse(matroska,
2128 matroska_clusters_incremental,
2129 &matroska->current_cluster);
2130 /* Try parsing the block again. */
2132 res = ebml_parse(matroska,
2133 matroska_cluster_incremental_parsing,
2134 &matroska->current_cluster);
2138 matroska->current_cluster_num_blocks <
2139 matroska->current_cluster.blocks.nb_elem) {
2140 blocks_list = &matroska->current_cluster.blocks;
2141 blocks = blocks_list->elem;
2143 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2144 i = blocks_list->nb_elem - 1;
2145 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2146 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2147 if (!blocks[i].non_simple)
2148 blocks[i].duration = AV_NOPTS_VALUE;
2149 res = matroska_parse_block(matroska,
2150 blocks[i].bin.data, blocks[i].bin.size,
2152 matroska->current_cluster.timecode,
2153 blocks[i].duration, is_keyframe,
2154 matroska->current_cluster_pos);
2158 if (res < 0) matroska->done = 1;
2162 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2164 MatroskaCluster cluster = { 0 };
2165 EbmlList *blocks_list;
2166 MatroskaBlock *blocks;
2169 if (!matroska->contains_ssa)
2170 return matroska_parse_cluster_incremental(matroska);
2171 pos = avio_tell(matroska->ctx->pb);
2172 matroska->prev_pkt = NULL;
2173 if (matroska->current_id)
2174 pos -= 4; /* sizeof the ID which was already read */
2175 res = ebml_parse(matroska, matroska_clusters, &cluster);
2176 blocks_list = &cluster.blocks;
2177 blocks = blocks_list->elem;
2178 for (i=0; i<blocks_list->nb_elem && !res; i++)
2179 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2180 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2181 if (!blocks[i].non_simple)
2182 blocks[i].duration = AV_NOPTS_VALUE;
2183 res=matroska_parse_block(matroska,
2184 blocks[i].bin.data, blocks[i].bin.size,
2185 blocks[i].bin.pos, cluster.timecode,
2186 blocks[i].duration, is_keyframe,
2189 ebml_free(matroska_cluster, &cluster);
2190 if (res < 0) matroska->done = 1;
2194 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2196 MatroskaDemuxContext *matroska = s->priv_data;
2199 while (!ret && matroska_deliver_packet(matroska, pkt)) {
2202 ret = matroska_parse_cluster(matroska);
2205 if (ret == AVERROR_INVALIDDATA && pkt->data) {
2206 pkt->flags |= AV_PKT_FLAG_CORRUPT;
2213 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2214 int64_t timestamp, int flags)
2216 MatroskaDemuxContext *matroska = s->priv_data;
2217 MatroskaTrack *tracks = matroska->tracks.elem;
2218 AVStream *st = s->streams[stream_index];
2219 int i, index, index_sub, index_min;
2221 /* Parse the CUES now since we need the index data to seek. */
2222 if (matroska->cues_parsing_deferred) {
2223 matroska_parse_cues(matroska);
2224 matroska->cues_parsing_deferred = 0;
2227 if (!st->nb_index_entries)
2229 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2231 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2232 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
2233 matroska->current_id = 0;
2234 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2235 matroska_clear_queue(matroska);
2236 if (matroska_parse_cluster(matroska) < 0)
2241 matroska_clear_queue(matroska);
2246 for (i=0; i < matroska->tracks.nb_elem; i++) {
2247 tracks[i].audio.pkt_cnt = 0;
2248 tracks[i].audio.sub_packet_cnt = 0;
2249 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2250 tracks[i].end_timecode = 0;
2251 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
2252 && !tracks[i].stream->discard != AVDISCARD_ALL) {
2253 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
2255 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
2256 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
2257 index_min = index_sub;
2261 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2262 matroska->current_id = 0;
2263 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2264 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2266 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2270 static int matroska_read_close(AVFormatContext *s)
2272 MatroskaDemuxContext *matroska = s->priv_data;
2273 MatroskaTrack *tracks = matroska->tracks.elem;
2276 matroska_clear_queue(matroska);
2278 for (n=0; n < matroska->tracks.nb_elem; n++)
2279 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2280 av_free(tracks[n].audio.buf);
2281 ebml_free(matroska_cluster, &matroska->current_cluster);
2282 ebml_free(matroska_segment, matroska);
2287 AVInputFormat ff_matroska_demuxer = {
2288 .name = "matroska,webm",
2289 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2290 .priv_data_size = sizeof(MatroskaDemuxContext),
2291 .read_probe = matroska_probe,
2292 .read_header = matroska_read_header,
2293 .read_packet = matroska_read_packet,
2294 .read_close = matroska_read_close,
2295 .read_seek = matroska_read_seek,