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 { MATROSKA_ID_CODECSTATE, EBML_NONE },
504 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
508 static EbmlSyntax matroska_cluster[] = {
509 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
510 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
511 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
512 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
513 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
517 static EbmlSyntax matroska_clusters[] = {
518 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
519 { MATROSKA_ID_INFO, EBML_NONE },
520 { MATROSKA_ID_CUES, EBML_NONE },
521 { MATROSKA_ID_TAGS, EBML_NONE },
522 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
526 static EbmlSyntax matroska_cluster_incremental_parsing[] = {
527 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
528 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
529 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
530 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
531 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
532 { MATROSKA_ID_INFO, EBML_NONE },
533 { MATROSKA_ID_CUES, EBML_NONE },
534 { MATROSKA_ID_TAGS, EBML_NONE },
535 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
536 { MATROSKA_ID_CLUSTER, EBML_STOP },
540 static EbmlSyntax matroska_cluster_incremental[] = {
541 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
542 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
543 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
544 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
545 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
549 static EbmlSyntax matroska_clusters_incremental[] = {
550 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster_incremental} },
551 { MATROSKA_ID_INFO, EBML_NONE },
552 { MATROSKA_ID_CUES, EBML_NONE },
553 { MATROSKA_ID_TAGS, EBML_NONE },
554 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
558 static const char *const matroska_doctypes[] = { "matroska", "webm" };
560 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
562 AVIOContext *pb = matroska->ctx->pb;
564 matroska->current_id = 0;
565 matroska->num_levels = 0;
567 /* seek to next position to resync from */
568 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
573 // try to find a toplevel element
574 while (!pb->eof_reached) {
575 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
576 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
577 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
578 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
579 matroska->current_id = id;
582 id = (id << 8) | avio_r8(pb);
590 * Return: Whether we reached the end of a level in the hierarchy or not.
592 static int ebml_level_end(MatroskaDemuxContext *matroska)
594 AVIOContext *pb = matroska->ctx->pb;
595 int64_t pos = avio_tell(pb);
597 if (matroska->num_levels > 0) {
598 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
599 if (pos - level->start >= level->length || matroska->current_id) {
600 matroska->num_levels--;
608 * Read: an "EBML number", which is defined as a variable-length
609 * array of bytes. The first byte indicates the length by giving a
610 * number of 0-bits followed by a one. The position of the first
611 * "one" bit inside the first byte indicates the length of this
613 * Returns: number of bytes read, < 0 on error
615 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
616 int max_size, uint64_t *number)
621 /* The first byte tells us the length in bytes - avio_r8() can normally
622 * return 0, but since that's not a valid first ebmlID byte, we can
623 * use it safely here to catch EOS. */
624 if (!(total = avio_r8(pb))) {
625 /* we might encounter EOS here */
626 if (!pb->eof_reached) {
627 int64_t pos = avio_tell(pb);
628 av_log(matroska->ctx, AV_LOG_ERROR,
629 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
631 return pb->error ? pb->error : AVERROR(EIO);
636 /* get the length of the EBML number */
637 read = 8 - ff_log2_tab[total];
638 if (read > max_size) {
639 int64_t pos = avio_tell(pb) - 1;
640 av_log(matroska->ctx, AV_LOG_ERROR,
641 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
642 (uint8_t) total, pos, pos);
643 return AVERROR_INVALIDDATA;
646 /* read out length */
647 total ^= 1 << ff_log2_tab[total];
649 total = (total << 8) | avio_r8(pb);
657 * Read a EBML length value.
658 * This needs special handling for the "unknown length" case which has multiple
661 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
664 int res = ebml_read_num(matroska, pb, 8, number);
665 if (res > 0 && *number + 1 == 1ULL << (7 * res))
666 *number = 0xffffffffffffffULL;
671 * Read the next element as an unsigned int.
672 * 0 is success, < 0 is failure.
674 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
679 return AVERROR_INVALIDDATA;
681 /* big-endian ordering; build up number */
684 *num = (*num << 8) | avio_r8(pb);
690 * Read the next element as a float.
691 * 0 is success, < 0 is failure.
693 static int ebml_read_float(AVIOContext *pb, int size, double *num)
697 } else if (size == 4) {
698 *num = av_int2float(avio_rb32(pb));
699 } else if (size == 8){
700 *num = av_int2double(avio_rb64(pb));
702 return AVERROR_INVALIDDATA;
708 * Read the next element as an ASCII string.
709 * 0 is success, < 0 is failure.
711 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
715 /* EBML strings are usually not 0-terminated, so we allocate one
716 * byte more, read the string and NULL-terminate it ourselves. */
717 if (!(res = av_malloc(size + 1)))
718 return AVERROR(ENOMEM);
719 if (avio_read(pb, (uint8_t *) res, size) != size) {
731 * Read the next element as binary data.
732 * 0 is success, < 0 is failure.
734 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
737 if (!(bin->data = av_malloc(length)))
738 return AVERROR(ENOMEM);
741 bin->pos = avio_tell(pb);
742 if (avio_read(pb, bin->data, length) != length) {
743 av_freep(&bin->data);
751 * Read the next element, but only the header. The contents
752 * are supposed to be sub-elements which can be read separately.
753 * 0 is success, < 0 is failure.
755 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
757 AVIOContext *pb = matroska->ctx->pb;
758 MatroskaLevel *level;
760 if (matroska->num_levels >= EBML_MAX_DEPTH) {
761 av_log(matroska->ctx, AV_LOG_ERROR,
762 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
763 return AVERROR(ENOSYS);
766 level = &matroska->levels[matroska->num_levels++];
767 level->start = avio_tell(pb);
768 level->length = length;
774 * Read signed/unsigned "EBML" numbers.
775 * Return: number of bytes processed, < 0 on error
777 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
778 uint8_t *data, uint32_t size, uint64_t *num)
781 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
782 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
786 * Same as above, but signed.
788 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
789 uint8_t *data, uint32_t size, int64_t *num)
794 /* read as unsigned number first */
795 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
798 /* make signed (weird way) */
799 *num = unum - ((1LL << (7*res - 1)) - 1);
804 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
805 EbmlSyntax *syntax, void *data);
807 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
808 uint32_t id, void *data)
811 for (i=0; syntax[i].id; i++)
812 if (id == syntax[i].id)
814 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
815 matroska->num_levels > 0 &&
816 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
817 return 0; // we reached the end of an unknown size cluster
818 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
819 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
820 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
821 return AVERROR_INVALIDDATA;
823 return ebml_parse_elem(matroska, &syntax[i], data);
826 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
829 if (!matroska->current_id) {
831 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
834 matroska->current_id = id | 1 << 7*res;
836 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
839 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
844 for (i=0; syntax[i].id; i++)
845 switch (syntax[i].type) {
847 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
850 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
854 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
858 while (!res && !ebml_level_end(matroska))
859 res = ebml_parse(matroska, syntax, data);
864 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
865 EbmlSyntax *syntax, void *data)
867 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
870 // max. 16 MB for strings
871 [EBML_STR] = 0x1000000,
872 [EBML_UTF8] = 0x1000000,
873 // max. 256 MB for binary data
874 [EBML_BIN] = 0x10000000,
875 // no limits for anything else
877 AVIOContext *pb = matroska->ctx->pb;
878 uint32_t id = syntax->id;
883 data = (char *)data + syntax->data_offset;
884 if (syntax->list_elem_size) {
885 EbmlList *list = data;
886 newelem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
888 return AVERROR(ENOMEM);
889 list->elem = newelem;
890 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
891 memset(data, 0, syntax->list_elem_size);
895 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
896 matroska->current_id = 0;
897 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
899 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
900 av_log(matroska->ctx, AV_LOG_ERROR,
901 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
902 length, max_lengths[syntax->type], syntax->type);
903 return AVERROR_INVALIDDATA;
907 switch (syntax->type) {
908 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
909 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
911 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
912 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
913 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
915 if (id == MATROSKA_ID_SEGMENT)
916 matroska->segment_start = avio_tell(matroska->ctx->pb);
917 return ebml_parse_nest(matroska, syntax->def.n, data);
918 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
919 case EBML_STOP: return 1;
920 default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
922 if (res == AVERROR_INVALIDDATA)
923 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
924 else if (res == AVERROR(EIO))
925 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
929 static void ebml_free(EbmlSyntax *syntax, void *data)
932 for (i=0; syntax[i].id; i++) {
933 void *data_off = (char *)data + syntax[i].data_offset;
934 switch (syntax[i].type) {
936 case EBML_UTF8: av_freep(data_off); break;
937 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
939 if (syntax[i].list_elem_size) {
940 EbmlList *list = data_off;
941 char *ptr = list->elem;
942 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
943 ebml_free(syntax[i].def.n, ptr);
946 ebml_free(syntax[i].def.n, data_off);
956 static int matroska_probe(AVProbeData *p)
959 int len_mask = 0x80, size = 1, n = 1, i;
962 if (AV_RB32(p->buf) != EBML_ID_HEADER)
965 /* length of header */
967 while (size <= 8 && !(total & len_mask)) {
973 total &= (len_mask - 1);
975 total = (total << 8) | p->buf[4 + n++];
977 /* Does the probe data contain the whole header? */
978 if (p->buf_size < 4 + size + total)
981 /* The header should contain a known document type. For now,
982 * we don't parse the whole header but simply check for the
983 * availability of that array of characters inside the header.
984 * Not fully fool-proof, but good enough. */
985 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
986 int probelen = strlen(matroska_doctypes[i]);
987 if (total < probelen)
989 for (n = 4+size; n <= 4+size+total-probelen; n++)
990 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
991 return AVPROBE_SCORE_MAX;
994 // probably valid EBML header but no recognized doctype
995 return AVPROBE_SCORE_EXTENSION;
998 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1001 MatroskaTrack *tracks = matroska->tracks.elem;
1004 for (i=0; i < matroska->tracks.nb_elem; i++)
1005 if (tracks[i].num == num)
1008 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1012 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
1013 MatroskaTrack *track)
1015 MatroskaTrackEncoding *encodings = track->encodings.elem;
1016 uint8_t* data = *buf;
1017 int isize = *buf_size;
1018 uint8_t* pkt_data = NULL;
1019 uint8_t av_unused *newpktdata;
1020 int pkt_size = isize;
1024 if (pkt_size >= 10000000)
1025 return AVERROR_INVALIDDATA;
1027 switch (encodings[0].compression.algo) {
1028 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: {
1029 int header_size = encodings[0].compression.settings.size;
1030 uint8_t *header = encodings[0].compression.settings.data;
1035 pkt_size = isize + header_size;
1036 pkt_data = av_malloc(pkt_size);
1038 return AVERROR(ENOMEM);
1040 memcpy(pkt_data, header, header_size);
1041 memcpy(pkt_data + header_size, data, isize);
1045 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1047 olen = pkt_size *= 3;
1048 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1050 result = AVERROR(ENOMEM);
1053 pkt_data = newpktdata;
1054 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1055 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
1057 result = AVERROR_INVALIDDATA;
1064 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
1065 z_stream zstream = {0};
1066 if (inflateInit(&zstream) != Z_OK)
1068 zstream.next_in = data;
1069 zstream.avail_in = isize;
1072 newpktdata = av_realloc(pkt_data, pkt_size);
1074 inflateEnd(&zstream);
1077 pkt_data = newpktdata;
1078 zstream.avail_out = pkt_size - zstream.total_out;
1079 zstream.next_out = pkt_data + zstream.total_out;
1080 result = inflate(&zstream, Z_NO_FLUSH);
1081 } while (result==Z_OK && pkt_size<10000000);
1082 pkt_size = zstream.total_out;
1083 inflateEnd(&zstream);
1084 if (result != Z_STREAM_END) {
1085 if (result == Z_MEM_ERROR)
1086 result = AVERROR(ENOMEM);
1088 result = AVERROR_INVALIDDATA;
1095 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
1096 bz_stream bzstream = {0};
1097 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1099 bzstream.next_in = data;
1100 bzstream.avail_in = isize;
1103 newpktdata = av_realloc(pkt_data, pkt_size);
1105 BZ2_bzDecompressEnd(&bzstream);
1108 pkt_data = newpktdata;
1109 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1110 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1111 result = BZ2_bzDecompress(&bzstream);
1112 } while (result==BZ_OK && pkt_size<10000000);
1113 pkt_size = bzstream.total_out_lo32;
1114 BZ2_bzDecompressEnd(&bzstream);
1115 if (result != BZ_STREAM_END) {
1116 if (result == BZ_MEM_ERROR)
1117 result = AVERROR(ENOMEM);
1119 result = AVERROR_INVALIDDATA;
1126 return AVERROR_INVALIDDATA;
1130 *buf_size = pkt_size;
1137 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1138 AVPacket *pkt, uint64_t display_duration)
1141 char *layer, *ptr = pkt->data, *end = ptr+pkt->size;
1142 for (; *ptr!=',' && ptr<end-1; ptr++);
1145 for (; *ptr!=',' && ptr<end-1; ptr++);
1147 int64_t end_pts = pkt->pts + display_duration;
1148 int sc = matroska->time_scale * pkt->pts / 10000000;
1149 int ec = matroska->time_scale * end_pts / 10000000;
1150 int sh, sm, ss, eh, em, es, len;
1151 sh = sc/360000; sc -= 360000*sh;
1152 sm = sc/ 6000; sc -= 6000*sm;
1153 ss = sc/ 100; sc -= 100*ss;
1154 eh = ec/360000; ec -= 360000*eh;
1155 em = ec/ 6000; ec -= 6000*em;
1156 es = ec/ 100; ec -= 100*es;
1158 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1159 if (!(line = av_buffer_alloc(len)))
1161 snprintf(line->data, len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1162 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1163 av_buffer_unref(&pkt->buf);
1165 pkt->data = line->data;
1166 pkt->size = strlen(line->data);
1170 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1172 int old_size = out->size;
1173 int ret = av_grow_packet(out, in->size);
1177 memcpy(out->data + old_size, in->data, in->size);
1184 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1185 AVDictionary **metadata, char *prefix)
1187 MatroskaTag *tags = list->elem;
1191 for (i=0; i < list->nb_elem; i++) {
1192 const char *lang = tags[i].lang && strcmp(tags[i].lang, "und") ?
1193 tags[i].lang : NULL;
1195 if (!tags[i].name) {
1196 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1199 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1200 else av_strlcpy(key, tags[i].name, sizeof(key));
1201 if (tags[i].def || !lang) {
1202 av_dict_set(metadata, key, tags[i].string, 0);
1203 if (tags[i].sub.nb_elem)
1204 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1207 av_strlcat(key, "-", sizeof(key));
1208 av_strlcat(key, lang, sizeof(key));
1209 av_dict_set(metadata, key, tags[i].string, 0);
1210 if (tags[i].sub.nb_elem)
1211 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1214 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1217 static void matroska_convert_tags(AVFormatContext *s)
1219 MatroskaDemuxContext *matroska = s->priv_data;
1220 MatroskaTags *tags = matroska->tags.elem;
1223 for (i=0; i < matroska->tags.nb_elem; i++) {
1224 if (tags[i].target.attachuid) {
1225 MatroskaAttachement *attachment = matroska->attachments.elem;
1226 for (j=0; j<matroska->attachments.nb_elem; j++)
1227 if (attachment[j].uid == tags[i].target.attachuid
1228 && attachment[j].stream)
1229 matroska_convert_tag(s, &tags[i].tag,
1230 &attachment[j].stream->metadata, NULL);
1231 } else if (tags[i].target.chapteruid) {
1232 MatroskaChapter *chapter = matroska->chapters.elem;
1233 for (j=0; j<matroska->chapters.nb_elem; j++)
1234 if (chapter[j].uid == tags[i].target.chapteruid
1235 && chapter[j].chapter)
1236 matroska_convert_tag(s, &tags[i].tag,
1237 &chapter[j].chapter->metadata, NULL);
1238 } else if (tags[i].target.trackuid) {
1239 MatroskaTrack *track = matroska->tracks.elem;
1240 for (j=0; j<matroska->tracks.nb_elem; j++)
1241 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1242 matroska_convert_tag(s, &tags[i].tag,
1243 &track[j].stream->metadata, NULL);
1245 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1246 tags[i].target.type);
1251 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
1253 EbmlList *seekhead_list = &matroska->seekhead;
1254 MatroskaSeekhead *seekhead = seekhead_list->elem;
1255 uint32_t level_up = matroska->level_up;
1256 int64_t before_pos = avio_tell(matroska->ctx->pb);
1257 uint32_t saved_id = matroska->current_id;
1258 MatroskaLevel level;
1262 if (idx >= seekhead_list->nb_elem
1263 || seekhead[idx].id == MATROSKA_ID_SEEKHEAD
1264 || seekhead[idx].id == MATROSKA_ID_CLUSTER)
1268 offset = seekhead[idx].pos + matroska->segment_start;
1269 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1270 /* We don't want to lose our seekhead level, so we add
1271 * a dummy. This is a crude hack. */
1272 if (matroska->num_levels == EBML_MAX_DEPTH) {
1273 av_log(matroska->ctx, AV_LOG_INFO,
1274 "Max EBML element depth (%d) reached, "
1275 "cannot parse further.\n", EBML_MAX_DEPTH);
1276 ret = AVERROR_INVALIDDATA;
1279 level.length = (uint64_t)-1;
1280 matroska->levels[matroska->num_levels] = level;
1281 matroska->num_levels++;
1282 matroska->current_id = 0;
1284 ret = ebml_parse(matroska, matroska_segment, matroska);
1286 /* remove dummy level */
1287 while (matroska->num_levels) {
1288 uint64_t length = matroska->levels[--matroska->num_levels].length;
1289 if (length == (uint64_t)-1)
1295 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1296 matroska->level_up = level_up;
1297 matroska->current_id = saved_id;
1302 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1304 EbmlList *seekhead_list = &matroska->seekhead;
1305 int64_t before_pos = avio_tell(matroska->ctx->pb);
1308 // we should not do any seeking in the streaming case
1309 if (!matroska->ctx->pb->seekable ||
1310 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1313 for (i = 0; i < seekhead_list->nb_elem; i++) {
1314 MatroskaSeekhead *seekhead = seekhead_list->elem;
1315 if (seekhead[i].pos <= before_pos)
1318 // defer cues parsing until we actually need cue data.
1319 if (seekhead[i].id == MATROSKA_ID_CUES) {
1320 matroska->cues_parsing_deferred = 1;
1324 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1329 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1330 EbmlList *seekhead_list = &matroska->seekhead;
1331 MatroskaSeekhead *seekhead = seekhead_list->elem;
1332 EbmlList *index_list;
1333 MatroskaIndex *index;
1334 int index_scale = 1;
1337 for (i = 0; i < seekhead_list->nb_elem; i++)
1338 if (seekhead[i].id == MATROSKA_ID_CUES)
1340 assert(i <= seekhead_list->nb_elem);
1342 matroska_parse_seekhead_entry(matroska, i);
1344 index_list = &matroska->index;
1345 index = index_list->elem;
1346 if (index_list->nb_elem
1347 && index[0].time > 1E14/matroska->time_scale) {
1348 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1349 index_scale = matroska->time_scale;
1351 for (i = 0; i < index_list->nb_elem; i++) {
1352 EbmlList *pos_list = &index[i].pos;
1353 MatroskaIndexPos *pos = pos_list->elem;
1354 for (j = 0; j < pos_list->nb_elem; j++) {
1355 MatroskaTrack *track = matroska_find_track_by_num(matroska, pos[j].track);
1356 if (track && track->stream)
1357 av_add_index_entry(track->stream,
1358 pos[j].pos + matroska->segment_start,
1359 index[i].time/index_scale, 0, 0,
1365 static int matroska_aac_profile(char *codec_id)
1367 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1370 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1371 if (strstr(codec_id, aac_profiles[profile]))
1376 static int matroska_aac_sri(int samplerate)
1380 for (sri=0; sri<FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1381 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1386 static int matroska_read_header(AVFormatContext *s)
1388 MatroskaDemuxContext *matroska = s->priv_data;
1389 EbmlList *attachements_list = &matroska->attachments;
1390 MatroskaAttachement *attachements;
1391 EbmlList *chapters_list = &matroska->chapters;
1392 MatroskaChapter *chapters;
1393 MatroskaTrack *tracks;
1394 uint64_t max_start = 0;
1402 /* First read the EBML header. */
1403 if (ebml_parse(matroska, ebml_syntax, &ebml)
1404 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1405 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) {
1406 av_log(matroska->ctx, AV_LOG_ERROR,
1407 "EBML header using unsupported features\n"
1408 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1409 ebml.version, ebml.doctype, ebml.doctype_version);
1410 ebml_free(ebml_syntax, &ebml);
1411 return AVERROR_PATCHWELCOME;
1413 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1414 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1416 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1417 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1418 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1419 ebml_free(ebml_syntax, &ebml);
1420 return AVERROR_INVALIDDATA;
1423 ebml_free(ebml_syntax, &ebml);
1425 /* The next thing is a segment. */
1426 pos = avio_tell(matroska->ctx->pb);
1427 res = ebml_parse(matroska, matroska_segments, matroska);
1428 // try resyncing until we find a EBML_STOP type element.
1430 res = matroska_resync(matroska, pos);
1433 pos = avio_tell(matroska->ctx->pb);
1434 res = ebml_parse(matroska, matroska_segment, matroska);
1436 matroska_execute_seekhead(matroska);
1438 if (!matroska->time_scale)
1439 matroska->time_scale = 1000000;
1440 if (matroska->duration)
1441 matroska->ctx->duration = matroska->duration * matroska->time_scale
1442 * 1000 / AV_TIME_BASE;
1443 av_dict_set(&s->metadata, "title", matroska->title, 0);
1445 tracks = matroska->tracks.elem;
1446 for (i=0; i < matroska->tracks.nb_elem; i++) {
1447 MatroskaTrack *track = &tracks[i];
1448 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1449 EbmlList *encodings_list = &tracks->encodings;
1450 MatroskaTrackEncoding *encodings = encodings_list->elem;
1451 uint8_t *extradata = NULL;
1452 int extradata_size = 0;
1453 int extradata_offset = 0;
1456 /* Apply some sanity checks. */
1457 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1458 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1459 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1460 av_log(matroska->ctx, AV_LOG_INFO,
1461 "Unknown or unsupported track type %"PRIu64"\n",
1465 if (track->codec_id == NULL)
1468 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1469 if (!track->default_duration && track->video.frame_rate > 0)
1470 track->default_duration = 1000000000/track->video.frame_rate;
1471 if (!track->video.display_width)
1472 track->video.display_width = track->video.pixel_width;
1473 if (!track->video.display_height)
1474 track->video.display_height = track->video.pixel_height;
1475 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1476 if (!track->audio.out_samplerate)
1477 track->audio.out_samplerate = track->audio.samplerate;
1479 if (encodings_list->nb_elem > 1) {
1480 av_log(matroska->ctx, AV_LOG_ERROR,
1481 "Multiple combined encodings not supported");
1482 } else if (encodings_list->nb_elem == 1) {
1483 if (encodings[0].type ||
1486 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1489 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1492 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1494 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP)) {
1495 encodings[0].scope = 0;
1496 av_log(matroska->ctx, AV_LOG_ERROR,
1497 "Unsupported encoding type");
1498 } else if (track->codec_priv.size && encodings[0].scope&2) {
1499 uint8_t *codec_priv = track->codec_priv.data;
1500 int ret = matroska_decode_buffer(&track->codec_priv.data,
1501 &track->codec_priv.size,
1504 track->codec_priv.data = NULL;
1505 track->codec_priv.size = 0;
1506 av_log(matroska->ctx, AV_LOG_ERROR,
1507 "Failed to decode codec private data\n");
1510 if (codec_priv != track->codec_priv.data)
1511 av_free(codec_priv);
1515 for(j=0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++){
1516 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1517 strlen(ff_mkv_codec_tags[j].str))){
1518 codec_id= ff_mkv_codec_tags[j].id;
1523 st = track->stream = avformat_new_stream(s, NULL);
1525 return AVERROR(ENOMEM);
1527 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1528 && track->codec_priv.size >= 40
1529 && track->codec_priv.data != NULL) {
1530 track->ms_compat = 1;
1531 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1532 codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc);
1533 extradata_offset = 40;
1534 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1535 && track->codec_priv.size >= 14
1536 && track->codec_priv.data != NULL) {
1538 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1539 0, NULL, NULL, NULL, NULL);
1540 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1543 codec_id = st->codec->codec_id;
1544 extradata_offset = FFMIN(track->codec_priv.size, 18);
1545 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1546 && (track->codec_priv.size >= 86)
1547 && (track->codec_priv.data != NULL)) {
1548 track->video.fourcc = AV_RL32(track->codec_priv.data);
1549 codec_id=ff_codec_get_id(ff_codec_movvideo_tags, track->video.fourcc);
1550 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1551 switch (track->audio.bitdepth) {
1552 case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
1553 case 24: codec_id = AV_CODEC_ID_PCM_S24BE; break;
1554 case 32: codec_id = AV_CODEC_ID_PCM_S32BE; break;
1556 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1557 switch (track->audio.bitdepth) {
1558 case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
1559 case 24: codec_id = AV_CODEC_ID_PCM_S24LE; break;
1560 case 32: codec_id = AV_CODEC_ID_PCM_S32LE; break;
1562 } else if (codec_id==AV_CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1563 codec_id = AV_CODEC_ID_PCM_F64LE;
1564 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1565 int profile = matroska_aac_profile(track->codec_id);
1566 int sri = matroska_aac_sri(track->audio.samplerate);
1567 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1568 if (extradata == NULL)
1569 return AVERROR(ENOMEM);
1570 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1571 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1572 if (strstr(track->codec_id, "SBR")) {
1573 sri = matroska_aac_sri(track->audio.out_samplerate);
1574 extradata[2] = 0x56;
1575 extradata[3] = 0xE5;
1576 extradata[4] = 0x80 | (sri<<3);
1580 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1581 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1582 Create the "atom size", "tag", and "tag version" fields the
1583 decoder expects manually. */
1584 extradata_size = 12 + track->codec_priv.size;
1585 extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1586 if (extradata == NULL)
1587 return AVERROR(ENOMEM);
1588 AV_WB32(extradata, extradata_size);
1589 memcpy(&extradata[4], "alac", 4);
1590 AV_WB32(&extradata[8], 0);
1591 memcpy(&extradata[12], track->codec_priv.data,
1592 track->codec_priv.size);
1593 } else if (codec_id == AV_CODEC_ID_TTA) {
1594 extradata_size = 30;
1595 extradata = av_mallocz(extradata_size);
1596 if (extradata == NULL)
1597 return AVERROR(ENOMEM);
1598 ffio_init_context(&b, extradata, extradata_size, 1,
1599 NULL, NULL, NULL, NULL);
1600 avio_write(&b, "TTA1", 4);
1602 avio_wl16(&b, track->audio.channels);
1603 avio_wl16(&b, track->audio.bitdepth);
1604 avio_wl32(&b, track->audio.out_samplerate);
1605 avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1606 } else if (codec_id == AV_CODEC_ID_RV10 || codec_id == AV_CODEC_ID_RV20 ||
1607 codec_id == AV_CODEC_ID_RV30 || codec_id == AV_CODEC_ID_RV40) {
1608 extradata_offset = 26;
1609 } else if (codec_id == AV_CODEC_ID_RA_144) {
1610 track->audio.out_samplerate = 8000;
1611 track->audio.channels = 1;
1612 } else if (codec_id == AV_CODEC_ID_RA_288 || codec_id == AV_CODEC_ID_COOK ||
1613 codec_id == AV_CODEC_ID_ATRAC3 || codec_id == AV_CODEC_ID_SIPR) {
1615 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
1616 0, NULL, NULL, NULL, NULL);
1618 flavor = avio_rb16(&b);
1619 track->audio.coded_framesize = avio_rb32(&b);
1621 track->audio.sub_packet_h = avio_rb16(&b);
1622 track->audio.frame_size = avio_rb16(&b);
1623 track->audio.sub_packet_size = avio_rb16(&b);
1624 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1625 if (codec_id == AV_CODEC_ID_RA_288) {
1626 st->codec->block_align = track->audio.coded_framesize;
1627 track->codec_priv.size = 0;
1629 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1630 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1631 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1632 st->codec->bit_rate = sipr_bit_rate[flavor];
1634 st->codec->block_align = track->audio.sub_packet_size;
1635 extradata_offset = 78;
1638 track->codec_priv.size -= extradata_offset;
1640 if (codec_id == AV_CODEC_ID_NONE)
1641 av_log(matroska->ctx, AV_LOG_INFO,
1642 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1644 if (track->time_scale < 0.01)
1645 track->time_scale = 1.0;
1646 avpriv_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1648 st->codec->codec_id = codec_id;
1650 if (strcmp(track->language, "und"))
1651 av_dict_set(&st->metadata, "language", track->language, 0);
1652 av_dict_set(&st->metadata, "title", track->name, 0);
1654 if (track->flag_default)
1655 st->disposition |= AV_DISPOSITION_DEFAULT;
1656 if (track->flag_forced)
1657 st->disposition |= AV_DISPOSITION_FORCED;
1659 if (!st->codec->extradata) {
1661 st->codec->extradata = extradata;
1662 st->codec->extradata_size = extradata_size;
1663 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1664 st->codec->extradata = av_mallocz(track->codec_priv.size +
1665 FF_INPUT_BUFFER_PADDING_SIZE);
1666 if(st->codec->extradata == NULL)
1667 return AVERROR(ENOMEM);
1668 st->codec->extradata_size = track->codec_priv.size;
1669 memcpy(st->codec->extradata,
1670 track->codec_priv.data + extradata_offset,
1671 track->codec_priv.size);
1675 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1676 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1677 st->codec->codec_tag = track->video.fourcc;
1678 st->codec->width = track->video.pixel_width;
1679 st->codec->height = track->video.pixel_height;
1680 av_reduce(&st->sample_aspect_ratio.num,
1681 &st->sample_aspect_ratio.den,
1682 st->codec->height * track->video.display_width,
1683 st->codec-> width * track->video.display_height,
1685 if (st->codec->codec_id != AV_CODEC_ID_H264)
1686 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1687 if (track->default_duration) {
1688 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1689 1000000000, track->default_duration, 30000);
1691 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1692 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1693 st->codec->sample_rate = track->audio.out_samplerate;
1694 st->codec->channels = track->audio.channels;
1695 if (st->codec->codec_id != AV_CODEC_ID_AAC)
1696 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1697 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1698 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1699 if (st->codec->codec_id == AV_CODEC_ID_SSA)
1700 matroska->contains_ssa = 1;
1704 attachements = attachements_list->elem;
1705 for (j=0; j<attachements_list->nb_elem; j++) {
1706 if (!(attachements[j].filename && attachements[j].mime &&
1707 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1708 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1710 AVStream *st = avformat_new_stream(s, NULL);
1713 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
1714 av_dict_set(&st->metadata, "mimetype", attachements[j].mime, 0);
1715 st->codec->codec_id = AV_CODEC_ID_NONE;
1716 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1717 st->codec->extradata = av_malloc(attachements[j].bin.size);
1718 if(st->codec->extradata == NULL)
1720 st->codec->extradata_size = attachements[j].bin.size;
1721 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1723 for (i=0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1724 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1725 strlen(ff_mkv_mime_tags[i].str))) {
1726 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1730 attachements[j].stream = st;
1734 chapters = chapters_list->elem;
1735 for (i=0; i<chapters_list->nb_elem; i++)
1736 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1737 && (max_start==0 || chapters[i].start > max_start)) {
1738 chapters[i].chapter =
1739 avpriv_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1740 chapters[i].start, chapters[i].end,
1742 av_dict_set(&chapters[i].chapter->metadata,
1743 "title", chapters[i].title, 0);
1744 max_start = chapters[i].start;
1747 matroska_convert_tags(s);
1753 * Put one packet in an application-supplied AVPacket struct.
1754 * Returns 0 on success or -1 on failure.
1756 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1759 if (matroska->num_packets > 0) {
1760 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1761 av_free(matroska->packets[0]);
1762 if (matroska->num_packets > 1) {
1764 memmove(&matroska->packets[0], &matroska->packets[1],
1765 (matroska->num_packets - 1) * sizeof(AVPacket *));
1766 newpackets = av_realloc(matroska->packets,
1767 (matroska->num_packets - 1) * sizeof(AVPacket *));
1769 matroska->packets = newpackets;
1771 av_freep(&matroska->packets);
1772 matroska->prev_pkt = NULL;
1774 matroska->num_packets--;
1782 * Free all packets in our internal queue.
1784 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1786 matroska->prev_pkt = NULL;
1787 if (matroska->packets) {
1789 for (n = 0; n < matroska->num_packets; n++) {
1790 av_free_packet(matroska->packets[n]);
1791 av_free(matroska->packets[n]);
1793 av_freep(&matroska->packets);
1794 matroska->num_packets = 0;
1798 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
1799 int* buf_size, int type,
1800 uint32_t **lace_buf, int *laces)
1802 int res = 0, n, size = *buf_size;
1803 uint8_t *data = *buf;
1804 uint32_t *lace_size;
1808 *lace_buf = av_mallocz(sizeof(int));
1810 return AVERROR(ENOMEM);
1812 *lace_buf[0] = size;
1820 lace_size = av_mallocz(*laces * sizeof(int));
1822 return AVERROR(ENOMEM);
1825 case 0x1: /* Xiph lacing */ {
1828 for (n = 0; res == 0 && n < *laces - 1; n++) {
1835 lace_size[n] += temp;
1841 total += lace_size[n];
1843 if (size <= total) {
1844 res = AVERROR_INVALIDDATA;
1848 lace_size[n] = size - total;
1852 case 0x2: /* fixed-size lacing */
1853 if (size % (*laces)) {
1854 res = AVERROR_INVALIDDATA;
1857 for (n = 0; n < *laces; n++)
1858 lace_size[n] = size / *laces;
1861 case 0x3: /* EBML lacing */ {
1864 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1866 av_log(matroska->ctx, AV_LOG_INFO,
1867 "EBML block data error\n");
1873 total = lace_size[0] = num;
1874 for (n = 1; res == 0 && n < *laces - 1; n++) {
1877 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1879 av_log(matroska->ctx, AV_LOG_INFO,
1880 "EBML block data error\n");
1886 lace_size[n] = lace_size[n - 1] + snum;
1887 total += lace_size[n];
1889 if (size <= total) {
1890 res = AVERROR_INVALIDDATA;
1893 lace_size[*laces - 1] = size - total;
1899 *lace_buf = lace_size;
1905 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
1906 MatroskaTrack *track,
1908 uint8_t *data, int size,
1909 uint64_t timecode, uint64_t duration,
1912 int a = st->codec->block_align;
1913 int sps = track->audio.sub_packet_size;
1914 int cfs = track->audio.coded_framesize;
1915 int h = track->audio.sub_packet_h;
1916 int y = track->audio.sub_packet_cnt;
1917 int w = track->audio.frame_size;
1920 if (!track->audio.pkt_cnt) {
1921 if (track->audio.sub_packet_cnt == 0)
1922 track->audio.buf_timecode = timecode;
1923 if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
1924 if (size < cfs * h / 2) {
1925 av_log(matroska->ctx, AV_LOG_ERROR,
1926 "Corrupt int4 RM-style audio packet size\n");
1927 return AVERROR_INVALIDDATA;
1929 for (x=0; x<h/2; x++)
1930 memcpy(track->audio.buf+x*2*w+y*cfs,
1932 } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
1934 av_log(matroska->ctx, AV_LOG_ERROR,
1935 "Corrupt sipr RM-style audio packet size\n");
1936 return AVERROR_INVALIDDATA;
1938 memcpy(track->audio.buf + y*w, data, w);
1940 if (size < sps * w / sps) {
1941 av_log(matroska->ctx, AV_LOG_ERROR,
1942 "Corrupt generic RM-style audio packet size\n");
1943 return AVERROR_INVALIDDATA;
1945 for (x=0; x<w/sps; x++)
1946 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1949 if (++track->audio.sub_packet_cnt >= h) {
1950 if (st->codec->codec_id == AV_CODEC_ID_SIPR)
1951 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
1952 track->audio.sub_packet_cnt = 0;
1953 track->audio.pkt_cnt = h*w / a;
1957 while (track->audio.pkt_cnt) {
1958 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
1959 av_new_packet(pkt, a);
1960 memcpy(pkt->data, track->audio.buf
1961 + a * (h*w / a - track->audio.pkt_cnt--), a);
1962 pkt->pts = track->audio.buf_timecode;
1963 track->audio.buf_timecode = AV_NOPTS_VALUE;
1965 pkt->stream_index = st->index;
1966 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1972 /* reconstruct full wavpack blocks from mangled matroska ones */
1973 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
1974 uint8_t **pdst, int *size)
1976 uint8_t *dst = NULL;
1981 int ret, offset = 0;
1983 if (srclen < 12 || track->stream->codec->extradata_size < 2)
1984 return AVERROR_INVALIDDATA;
1986 ver = AV_RL16(track->stream->codec->extradata);
1988 samples = AV_RL32(src);
1992 while (srclen >= 8) {
1997 uint32_t flags = AV_RL32(src);
1998 uint32_t crc = AV_RL32(src + 4);
2002 multiblock = (flags & 0x1800) != 0x1800;
2005 ret = AVERROR_INVALIDDATA;
2008 blocksize = AV_RL32(src);
2014 if (blocksize > srclen) {
2015 ret = AVERROR_INVALIDDATA;
2019 tmp = av_realloc(dst, dstlen + blocksize + 32);
2021 ret = AVERROR(ENOMEM);
2025 dstlen += blocksize + 32;
2027 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2028 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2029 AV_WL16(dst + offset + 8, ver); // version
2030 AV_WL16(dst + offset + 10, 0); // track/index_no
2031 AV_WL32(dst + offset + 12, 0); // total samples
2032 AV_WL32(dst + offset + 16, 0); // block index
2033 AV_WL32(dst + offset + 20, samples); // number of samples
2034 AV_WL32(dst + offset + 24, flags); // flags
2035 AV_WL32(dst + offset + 28, crc); // crc
2036 memcpy (dst + offset + 32, src, blocksize); // block data
2039 srclen -= blocksize;
2040 offset += blocksize + 32;
2053 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2054 MatroskaTrack *track,
2056 uint8_t *data, int pkt_size,
2057 uint64_t timecode, uint64_t duration,
2058 int64_t pos, int is_keyframe)
2060 MatroskaTrackEncoding *encodings = track->encodings.elem;
2061 uint8_t *pkt_data = data;
2062 int offset = 0, res;
2065 if (encodings && encodings->scope & 1) {
2066 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2071 if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2073 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2075 av_log(matroska->ctx, AV_LOG_ERROR, "Error parsing a wavpack block.\n");
2078 if (pkt_data != data)
2079 av_freep(&pkt_data);
2083 if (st->codec->codec_id == AV_CODEC_ID_PRORES)
2086 pkt = av_mallocz(sizeof(AVPacket));
2087 /* XXX: prevent data copy... */
2088 if (av_new_packet(pkt, pkt_size + offset) < 0) {
2090 return AVERROR(ENOMEM);
2093 if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
2094 uint8_t *buf = pkt->data;
2095 bytestream_put_be32(&buf, pkt_size);
2096 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2099 memcpy(pkt->data + offset, pkt_data, pkt_size);
2101 if (pkt_data != data)
2104 pkt->flags = is_keyframe;
2105 pkt->stream_index = st->index;
2107 if (track->ms_compat)
2108 pkt->dts = timecode;
2110 pkt->pts = timecode;
2112 if (st->codec->codec_id == AV_CODEC_ID_TEXT)
2113 pkt->convergence_duration = duration;
2114 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
2115 pkt->duration = duration;
2117 if (st->codec->codec_id == AV_CODEC_ID_SSA)
2118 matroska_fix_ass_packet(matroska, pkt, duration);
2120 if (matroska->prev_pkt &&
2121 timecode != AV_NOPTS_VALUE &&
2122 matroska->prev_pkt->pts == timecode &&
2123 matroska->prev_pkt->stream_index == st->index &&
2124 st->codec->codec_id == AV_CODEC_ID_SSA)
2125 matroska_merge_packets(matroska->prev_pkt, pkt);
2127 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
2128 matroska->prev_pkt = pkt;
2133 if (pkt_data != data)
2134 av_freep(&pkt_data);
2138 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2139 int size, int64_t pos, uint64_t cluster_time,
2140 uint64_t block_duration, int is_keyframe,
2141 int64_t cluster_pos)
2143 uint64_t timecode = AV_NOPTS_VALUE;
2144 MatroskaTrack *track;
2148 uint32_t *lace_size = NULL;
2149 int n, flags, laces = 0;
2150 uint64_t num, duration;
2152 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2153 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2159 track = matroska_find_track_by_num(matroska, num);
2160 if (!track || !track->stream) {
2161 av_log(matroska->ctx, AV_LOG_INFO,
2162 "Invalid stream %"PRIu64" or size %u\n", num, size);
2163 return AVERROR_INVALIDDATA;
2164 } else if (size <= 3)
2167 if (st->discard >= AVDISCARD_ALL)
2170 block_time = AV_RB16(data);
2174 if (is_keyframe == -1)
2175 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2177 if (cluster_time != (uint64_t)-1
2178 && (block_time >= 0 || cluster_time >= -block_time)) {
2179 timecode = cluster_time + block_time;
2180 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
2181 && timecode < track->end_timecode)
2182 is_keyframe = 0; /* overlapping subtitles are not key frame */
2184 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
2187 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2188 if (!is_keyframe || timecode < matroska->skip_to_timecode)
2190 matroska->skip_to_keyframe = 0;
2193 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2194 &lace_size, &laces);
2199 if (block_duration != AV_NOPTS_VALUE) {
2200 duration = block_duration / laces;
2201 if (block_duration != duration * laces) {
2202 av_log(matroska->ctx, AV_LOG_WARNING,
2203 "Incorrect block_duration, possibly corrupted container");
2206 duration = track->default_duration / matroska->time_scale;
2207 block_duration = duration * laces;
2210 if (timecode != AV_NOPTS_VALUE)
2211 track->end_timecode =
2212 FFMAX(track->end_timecode, timecode + block_duration);
2214 for (n = 0; n < laces; n++) {
2215 if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2216 st->codec->codec_id == AV_CODEC_ID_COOK ||
2217 st->codec->codec_id == AV_CODEC_ID_SIPR ||
2218 st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2219 st->codec->block_align && track->audio.sub_packet_size) {
2221 res = matroska_parse_rm_audio(matroska, track, st, data,
2223 timecode, duration, pos);
2228 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2230 pos, !n? is_keyframe : 0);
2235 if (timecode != AV_NOPTS_VALUE)
2236 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2237 data += lace_size[n];
2245 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2247 EbmlList *blocks_list;
2248 MatroskaBlock *blocks;
2250 res = ebml_parse(matroska,
2251 matroska_cluster_incremental_parsing,
2252 &matroska->current_cluster);
2255 if (matroska->current_cluster_pos)
2256 ebml_level_end(matroska);
2257 ebml_free(matroska_cluster, &matroska->current_cluster);
2258 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2259 matroska->current_cluster_num_blocks = 0;
2260 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2261 matroska->prev_pkt = NULL;
2262 /* sizeof the ID which was already read */
2263 if (matroska->current_id)
2264 matroska->current_cluster_pos -= 4;
2265 res = ebml_parse(matroska,
2266 matroska_clusters_incremental,
2267 &matroska->current_cluster);
2268 /* Try parsing the block again. */
2270 res = ebml_parse(matroska,
2271 matroska_cluster_incremental_parsing,
2272 &matroska->current_cluster);
2276 matroska->current_cluster_num_blocks <
2277 matroska->current_cluster.blocks.nb_elem) {
2278 blocks_list = &matroska->current_cluster.blocks;
2279 blocks = blocks_list->elem;
2281 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2282 i = blocks_list->nb_elem - 1;
2283 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2284 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2285 if (!blocks[i].non_simple)
2286 blocks[i].duration = AV_NOPTS_VALUE;
2287 res = matroska_parse_block(matroska,
2288 blocks[i].bin.data, blocks[i].bin.size,
2290 matroska->current_cluster.timecode,
2291 blocks[i].duration, is_keyframe,
2292 matroska->current_cluster_pos);
2296 if (res < 0) matroska->done = 1;
2300 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2302 MatroskaCluster cluster = { 0 };
2303 EbmlList *blocks_list;
2304 MatroskaBlock *blocks;
2307 if (!matroska->contains_ssa)
2308 return matroska_parse_cluster_incremental(matroska);
2309 pos = avio_tell(matroska->ctx->pb);
2310 matroska->prev_pkt = NULL;
2311 if (matroska->current_id)
2312 pos -= 4; /* sizeof the ID which was already read */
2313 res = ebml_parse(matroska, matroska_clusters, &cluster);
2314 blocks_list = &cluster.blocks;
2315 blocks = blocks_list->elem;
2316 for (i=0; i<blocks_list->nb_elem && !res; i++)
2317 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2318 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2319 if (!blocks[i].non_simple)
2320 blocks[i].duration = AV_NOPTS_VALUE;
2321 res=matroska_parse_block(matroska,
2322 blocks[i].bin.data, blocks[i].bin.size,
2323 blocks[i].bin.pos, cluster.timecode,
2324 blocks[i].duration, is_keyframe,
2327 ebml_free(matroska_cluster, &cluster);
2331 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2333 MatroskaDemuxContext *matroska = s->priv_data;
2336 while (!ret && matroska_deliver_packet(matroska, pkt)) {
2337 int64_t pos = avio_tell(matroska->ctx->pb);
2340 if (matroska_parse_cluster(matroska) < 0)
2341 ret = matroska_resync(matroska, pos);
2344 if (ret == AVERROR_INVALIDDATA && pkt->data) {
2345 pkt->flags |= AV_PKT_FLAG_CORRUPT;
2352 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2353 int64_t timestamp, int flags)
2355 MatroskaDemuxContext *matroska = s->priv_data;
2356 MatroskaTrack *tracks = matroska->tracks.elem;
2357 AVStream *st = s->streams[stream_index];
2358 int i, index, index_sub, index_min;
2360 /* Parse the CUES now since we need the index data to seek. */
2361 if (matroska->cues_parsing_deferred) {
2362 matroska_parse_cues(matroska);
2363 matroska->cues_parsing_deferred = 0;
2366 if (!st->nb_index_entries)
2368 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2370 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2371 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
2372 matroska->current_id = 0;
2373 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2374 matroska_clear_queue(matroska);
2375 if (matroska_parse_cluster(matroska) < 0)
2380 matroska_clear_queue(matroska);
2385 for (i=0; i < matroska->tracks.nb_elem; i++) {
2386 tracks[i].audio.pkt_cnt = 0;
2387 tracks[i].audio.sub_packet_cnt = 0;
2388 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2389 tracks[i].end_timecode = 0;
2390 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
2391 && !tracks[i].stream->discard != AVDISCARD_ALL) {
2392 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
2394 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
2395 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
2396 index_min = index_sub;
2400 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2401 matroska->current_id = 0;
2402 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2403 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2405 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2409 static int matroska_read_close(AVFormatContext *s)
2411 MatroskaDemuxContext *matroska = s->priv_data;
2412 MatroskaTrack *tracks = matroska->tracks.elem;
2415 matroska_clear_queue(matroska);
2417 for (n=0; n < matroska->tracks.nb_elem; n++)
2418 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2419 av_free(tracks[n].audio.buf);
2420 ebml_free(matroska_cluster, &matroska->current_cluster);
2421 ebml_free(matroska_segment, matroska);
2426 AVInputFormat ff_matroska_demuxer = {
2427 .name = "matroska,webm",
2428 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2429 .priv_data_size = sizeof(MatroskaDemuxContext),
2430 .read_probe = matroska_probe,
2431 .read_header = matroska_read_header,
2432 .read_packet = matroska_read_packet,
2433 .read_close = matroska_read_close,
2434 .read_seek = matroska_read_seek,