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 void *newdata = av_realloc(out->data, out->size+in->size);
1142 return AVERROR(ENOMEM);
1143 out->data = newdata;
1144 memcpy(out->data+out->size, in->data, in->size);
1145 out->size += in->size;
1146 av_destruct_packet(in);
1151 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1152 AVDictionary **metadata, char *prefix)
1154 MatroskaTag *tags = list->elem;
1158 for (i=0; i < list->nb_elem; i++) {
1159 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1161 if (!tags[i].name) {
1162 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1165 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1166 else av_strlcpy(key, tags[i].name, sizeof(key));
1167 if (tags[i].def || !lang) {
1168 av_dict_set(metadata, key, tags[i].string, 0);
1169 if (tags[i].sub.nb_elem)
1170 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1173 av_strlcat(key, "-", sizeof(key));
1174 av_strlcat(key, lang, sizeof(key));
1175 av_dict_set(metadata, key, tags[i].string, 0);
1176 if (tags[i].sub.nb_elem)
1177 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1180 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1183 static void matroska_convert_tags(AVFormatContext *s)
1185 MatroskaDemuxContext *matroska = s->priv_data;
1186 MatroskaTags *tags = matroska->tags.elem;
1189 for (i=0; i < matroska->tags.nb_elem; i++) {
1190 if (tags[i].target.attachuid) {
1191 MatroskaAttachement *attachment = matroska->attachments.elem;
1192 for (j=0; j<matroska->attachments.nb_elem; j++)
1193 if (attachment[j].uid == tags[i].target.attachuid
1194 && attachment[j].stream)
1195 matroska_convert_tag(s, &tags[i].tag,
1196 &attachment[j].stream->metadata, NULL);
1197 } else if (tags[i].target.chapteruid) {
1198 MatroskaChapter *chapter = matroska->chapters.elem;
1199 for (j=0; j<matroska->chapters.nb_elem; j++)
1200 if (chapter[j].uid == tags[i].target.chapteruid
1201 && chapter[j].chapter)
1202 matroska_convert_tag(s, &tags[i].tag,
1203 &chapter[j].chapter->metadata, NULL);
1204 } else if (tags[i].target.trackuid) {
1205 MatroskaTrack *track = matroska->tracks.elem;
1206 for (j=0; j<matroska->tracks.nb_elem; j++)
1207 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1208 matroska_convert_tag(s, &tags[i].tag,
1209 &track[j].stream->metadata, NULL);
1211 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1212 tags[i].target.type);
1217 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
1219 EbmlList *seekhead_list = &matroska->seekhead;
1220 MatroskaSeekhead *seekhead = seekhead_list->elem;
1221 uint32_t level_up = matroska->level_up;
1222 int64_t before_pos = avio_tell(matroska->ctx->pb);
1223 uint32_t saved_id = matroska->current_id;
1224 MatroskaLevel level;
1228 if (idx >= seekhead_list->nb_elem
1229 || seekhead[idx].id == MATROSKA_ID_SEEKHEAD
1230 || seekhead[idx].id == MATROSKA_ID_CLUSTER)
1234 offset = seekhead[idx].pos + matroska->segment_start;
1235 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1236 /* We don't want to lose our seekhead level, so we add
1237 * a dummy. This is a crude hack. */
1238 if (matroska->num_levels == EBML_MAX_DEPTH) {
1239 av_log(matroska->ctx, AV_LOG_INFO,
1240 "Max EBML element depth (%d) reached, "
1241 "cannot parse further.\n", EBML_MAX_DEPTH);
1242 ret = AVERROR_INVALIDDATA;
1245 level.length = (uint64_t)-1;
1246 matroska->levels[matroska->num_levels] = level;
1247 matroska->num_levels++;
1248 matroska->current_id = 0;
1250 ret = ebml_parse(matroska, matroska_segment, matroska);
1252 /* remove dummy level */
1253 while (matroska->num_levels) {
1254 uint64_t length = matroska->levels[--matroska->num_levels].length;
1255 if (length == (uint64_t)-1)
1261 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1262 matroska->level_up = level_up;
1263 matroska->current_id = saved_id;
1268 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1270 EbmlList *seekhead_list = &matroska->seekhead;
1271 int64_t before_pos = avio_tell(matroska->ctx->pb);
1274 // we should not do any seeking in the streaming case
1275 if (!matroska->ctx->pb->seekable ||
1276 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1279 for (i = 0; i < seekhead_list->nb_elem; i++) {
1280 MatroskaSeekhead *seekhead = seekhead_list->elem;
1281 if (seekhead[i].pos <= before_pos)
1284 // defer cues parsing until we actually need cue data.
1285 if (seekhead[i].id == MATROSKA_ID_CUES) {
1286 matroska->cues_parsing_deferred = 1;
1290 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1295 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1296 EbmlList *seekhead_list = &matroska->seekhead;
1297 MatroskaSeekhead *seekhead = seekhead_list->elem;
1298 EbmlList *index_list;
1299 MatroskaIndex *index;
1300 int index_scale = 1;
1303 for (i = 0; i < seekhead_list->nb_elem; i++)
1304 if (seekhead[i].id == MATROSKA_ID_CUES)
1306 assert(i <= seekhead_list->nb_elem);
1308 matroska_parse_seekhead_entry(matroska, i);
1310 index_list = &matroska->index;
1311 index = index_list->elem;
1312 if (index_list->nb_elem
1313 && index[0].time > 1E14/matroska->time_scale) {
1314 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1315 index_scale = matroska->time_scale;
1317 for (i = 0; i < index_list->nb_elem; i++) {
1318 EbmlList *pos_list = &index[i].pos;
1319 MatroskaIndexPos *pos = pos_list->elem;
1320 for (j = 0; j < pos_list->nb_elem; j++) {
1321 MatroskaTrack *track = matroska_find_track_by_num(matroska, pos[j].track);
1322 if (track && track->stream)
1323 av_add_index_entry(track->stream,
1324 pos[j].pos + matroska->segment_start,
1325 index[i].time/index_scale, 0, 0,
1331 static int matroska_aac_profile(char *codec_id)
1333 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1336 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1337 if (strstr(codec_id, aac_profiles[profile]))
1342 static int matroska_aac_sri(int samplerate)
1346 for (sri=0; sri<FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1347 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1352 static int matroska_read_header(AVFormatContext *s)
1354 MatroskaDemuxContext *matroska = s->priv_data;
1355 EbmlList *attachements_list = &matroska->attachments;
1356 MatroskaAttachement *attachements;
1357 EbmlList *chapters_list = &matroska->chapters;
1358 MatroskaChapter *chapters;
1359 MatroskaTrack *tracks;
1360 uint64_t max_start = 0;
1367 /* First read the EBML header. */
1368 if (ebml_parse(matroska, ebml_syntax, &ebml)
1369 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1370 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) {
1371 av_log(matroska->ctx, AV_LOG_ERROR,
1372 "EBML header using unsupported features\n"
1373 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1374 ebml.version, ebml.doctype, ebml.doctype_version);
1375 ebml_free(ebml_syntax, &ebml);
1376 return AVERROR_PATCHWELCOME;
1378 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1379 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1381 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1382 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1383 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1384 ebml_free(ebml_syntax, &ebml);
1385 return AVERROR_INVALIDDATA;
1388 ebml_free(ebml_syntax, &ebml);
1390 /* The next thing is a segment. */
1391 if ((res = ebml_parse(matroska, matroska_segments, matroska)) < 0)
1393 matroska_execute_seekhead(matroska);
1395 if (!matroska->time_scale)
1396 matroska->time_scale = 1000000;
1397 if (matroska->duration)
1398 matroska->ctx->duration = matroska->duration * matroska->time_scale
1399 * 1000 / AV_TIME_BASE;
1400 av_dict_set(&s->metadata, "title", matroska->title, 0);
1402 tracks = matroska->tracks.elem;
1403 for (i=0; i < matroska->tracks.nb_elem; i++) {
1404 MatroskaTrack *track = &tracks[i];
1405 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1406 EbmlList *encodings_list = &tracks->encodings;
1407 MatroskaTrackEncoding *encodings = encodings_list->elem;
1408 uint8_t *extradata = NULL;
1409 int extradata_size = 0;
1410 int extradata_offset = 0;
1413 /* Apply some sanity checks. */
1414 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1415 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1416 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1417 av_log(matroska->ctx, AV_LOG_INFO,
1418 "Unknown or unsupported track type %"PRIu64"\n",
1422 if (track->codec_id == NULL)
1425 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1426 if (!track->default_duration && track->video.frame_rate > 0)
1427 track->default_duration = 1000000000/track->video.frame_rate;
1428 if (!track->video.display_width)
1429 track->video.display_width = track->video.pixel_width;
1430 if (!track->video.display_height)
1431 track->video.display_height = track->video.pixel_height;
1432 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1433 if (!track->audio.out_samplerate)
1434 track->audio.out_samplerate = track->audio.samplerate;
1436 if (encodings_list->nb_elem > 1) {
1437 av_log(matroska->ctx, AV_LOG_ERROR,
1438 "Multiple combined encodings not supported");
1439 } else if (encodings_list->nb_elem == 1) {
1440 if (encodings[0].type ||
1443 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1446 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1449 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1451 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP)) {
1452 encodings[0].scope = 0;
1453 av_log(matroska->ctx, AV_LOG_ERROR,
1454 "Unsupported encoding type");
1455 } else if (track->codec_priv.size && encodings[0].scope&2) {
1456 uint8_t *codec_priv = track->codec_priv.data;
1457 int ret = matroska_decode_buffer(&track->codec_priv.data,
1458 &track->codec_priv.size,
1461 track->codec_priv.data = NULL;
1462 track->codec_priv.size = 0;
1463 av_log(matroska->ctx, AV_LOG_ERROR,
1464 "Failed to decode codec private data\n");
1467 if (codec_priv != track->codec_priv.data)
1468 av_free(codec_priv);
1472 for(j=0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++){
1473 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1474 strlen(ff_mkv_codec_tags[j].str))){
1475 codec_id= ff_mkv_codec_tags[j].id;
1480 st = track->stream = avformat_new_stream(s, NULL);
1482 return AVERROR(ENOMEM);
1484 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1485 && track->codec_priv.size >= 40
1486 && track->codec_priv.data != NULL) {
1487 track->ms_compat = 1;
1488 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1489 codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc);
1490 extradata_offset = 40;
1491 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1492 && track->codec_priv.size >= 14
1493 && track->codec_priv.data != NULL) {
1495 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1496 AVIO_FLAG_READ, NULL, NULL, NULL, NULL);
1497 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1500 codec_id = st->codec->codec_id;
1501 extradata_offset = FFMIN(track->codec_priv.size, 18);
1502 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1503 && (track->codec_priv.size >= 86)
1504 && (track->codec_priv.data != NULL)) {
1505 track->video.fourcc = AV_RL32(track->codec_priv.data);
1506 codec_id=ff_codec_get_id(ff_codec_movvideo_tags, track->video.fourcc);
1507 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1508 switch (track->audio.bitdepth) {
1509 case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
1510 case 24: codec_id = AV_CODEC_ID_PCM_S24BE; break;
1511 case 32: codec_id = AV_CODEC_ID_PCM_S32BE; break;
1513 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1514 switch (track->audio.bitdepth) {
1515 case 8: codec_id = AV_CODEC_ID_PCM_U8; break;
1516 case 24: codec_id = AV_CODEC_ID_PCM_S24LE; break;
1517 case 32: codec_id = AV_CODEC_ID_PCM_S32LE; break;
1519 } else if (codec_id==AV_CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1520 codec_id = AV_CODEC_ID_PCM_F64LE;
1521 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1522 int profile = matroska_aac_profile(track->codec_id);
1523 int sri = matroska_aac_sri(track->audio.samplerate);
1524 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1525 if (extradata == NULL)
1526 return AVERROR(ENOMEM);
1527 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1528 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1529 if (strstr(track->codec_id, "SBR")) {
1530 sri = matroska_aac_sri(track->audio.out_samplerate);
1531 extradata[2] = 0x56;
1532 extradata[3] = 0xE5;
1533 extradata[4] = 0x80 | (sri<<3);
1537 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1538 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1539 Create the "atom size", "tag", and "tag version" fields the
1540 decoder expects manually. */
1541 extradata_size = 12 + track->codec_priv.size;
1542 extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1543 if (extradata == NULL)
1544 return AVERROR(ENOMEM);
1545 AV_WB32(extradata, extradata_size);
1546 memcpy(&extradata[4], "alac", 4);
1547 AV_WB32(&extradata[8], 0);
1548 memcpy(&extradata[12], track->codec_priv.data,
1549 track->codec_priv.size);
1550 } else if (codec_id == AV_CODEC_ID_TTA) {
1551 extradata_size = 30;
1552 extradata = av_mallocz(extradata_size);
1553 if (extradata == NULL)
1554 return AVERROR(ENOMEM);
1555 ffio_init_context(&b, extradata, extradata_size, 1,
1556 NULL, NULL, NULL, NULL);
1557 avio_write(&b, "TTA1", 4);
1559 avio_wl16(&b, track->audio.channels);
1560 avio_wl16(&b, track->audio.bitdepth);
1561 avio_wl32(&b, track->audio.out_samplerate);
1562 avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1563 } else if (codec_id == AV_CODEC_ID_RV10 || codec_id == AV_CODEC_ID_RV20 ||
1564 codec_id == AV_CODEC_ID_RV30 || codec_id == AV_CODEC_ID_RV40) {
1565 extradata_offset = 26;
1566 } else if (codec_id == AV_CODEC_ID_RA_144) {
1567 track->audio.out_samplerate = 8000;
1568 track->audio.channels = 1;
1569 } else if (codec_id == AV_CODEC_ID_RA_288 || codec_id == AV_CODEC_ID_COOK ||
1570 codec_id == AV_CODEC_ID_ATRAC3 || codec_id == AV_CODEC_ID_SIPR) {
1572 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
1573 0, NULL, NULL, NULL, NULL);
1575 flavor = avio_rb16(&b);
1576 track->audio.coded_framesize = avio_rb32(&b);
1578 track->audio.sub_packet_h = avio_rb16(&b);
1579 track->audio.frame_size = avio_rb16(&b);
1580 track->audio.sub_packet_size = avio_rb16(&b);
1581 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1582 if (codec_id == AV_CODEC_ID_RA_288) {
1583 st->codec->block_align = track->audio.coded_framesize;
1584 track->codec_priv.size = 0;
1586 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1587 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1588 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1589 st->codec->bit_rate = sipr_bit_rate[flavor];
1591 st->codec->block_align = track->audio.sub_packet_size;
1592 extradata_offset = 78;
1595 track->codec_priv.size -= extradata_offset;
1597 if (codec_id == AV_CODEC_ID_NONE)
1598 av_log(matroska->ctx, AV_LOG_INFO,
1599 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1601 if (track->time_scale < 0.01)
1602 track->time_scale = 1.0;
1603 avpriv_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1605 st->codec->codec_id = codec_id;
1607 if (strcmp(track->language, "und"))
1608 av_dict_set(&st->metadata, "language", track->language, 0);
1609 av_dict_set(&st->metadata, "title", track->name, 0);
1611 if (track->flag_default)
1612 st->disposition |= AV_DISPOSITION_DEFAULT;
1613 if (track->flag_forced)
1614 st->disposition |= AV_DISPOSITION_FORCED;
1616 if (!st->codec->extradata) {
1618 st->codec->extradata = extradata;
1619 st->codec->extradata_size = extradata_size;
1620 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1621 st->codec->extradata = av_mallocz(track->codec_priv.size +
1622 FF_INPUT_BUFFER_PADDING_SIZE);
1623 if(st->codec->extradata == NULL)
1624 return AVERROR(ENOMEM);
1625 st->codec->extradata_size = track->codec_priv.size;
1626 memcpy(st->codec->extradata,
1627 track->codec_priv.data + extradata_offset,
1628 track->codec_priv.size);
1632 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1633 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1634 st->codec->codec_tag = track->video.fourcc;
1635 st->codec->width = track->video.pixel_width;
1636 st->codec->height = track->video.pixel_height;
1637 av_reduce(&st->sample_aspect_ratio.num,
1638 &st->sample_aspect_ratio.den,
1639 st->codec->height * track->video.display_width,
1640 st->codec-> width * track->video.display_height,
1642 if (st->codec->codec_id != AV_CODEC_ID_H264)
1643 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1644 if (track->default_duration) {
1645 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1646 1000000000, track->default_duration, 30000);
1647 #if FF_API_R_FRAME_RATE
1648 st->r_frame_rate = st->avg_frame_rate;
1651 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1652 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1653 st->codec->sample_rate = track->audio.out_samplerate;
1654 st->codec->channels = track->audio.channels;
1655 if (st->codec->codec_id != AV_CODEC_ID_AAC)
1656 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1657 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1658 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1659 if (st->codec->codec_id == AV_CODEC_ID_SSA)
1660 matroska->contains_ssa = 1;
1664 attachements = attachements_list->elem;
1665 for (j=0; j<attachements_list->nb_elem; j++) {
1666 if (!(attachements[j].filename && attachements[j].mime &&
1667 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1668 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1670 AVStream *st = avformat_new_stream(s, NULL);
1673 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
1674 av_dict_set(&st->metadata, "mimetype", attachements[j].mime, 0);
1675 st->codec->codec_id = AV_CODEC_ID_NONE;
1676 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1677 st->codec->extradata = av_malloc(attachements[j].bin.size);
1678 if(st->codec->extradata == NULL)
1680 st->codec->extradata_size = attachements[j].bin.size;
1681 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1683 for (i=0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1684 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1685 strlen(ff_mkv_mime_tags[i].str))) {
1686 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1690 attachements[j].stream = st;
1694 chapters = chapters_list->elem;
1695 for (i=0; i<chapters_list->nb_elem; i++)
1696 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1697 && (max_start==0 || chapters[i].start > max_start)) {
1698 chapters[i].chapter =
1699 avpriv_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1700 chapters[i].start, chapters[i].end,
1702 av_dict_set(&chapters[i].chapter->metadata,
1703 "title", chapters[i].title, 0);
1704 max_start = chapters[i].start;
1707 matroska_convert_tags(s);
1713 * Put one packet in an application-supplied AVPacket struct.
1714 * Returns 0 on success or -1 on failure.
1716 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1719 if (matroska->num_packets > 0) {
1720 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1721 av_free(matroska->packets[0]);
1722 if (matroska->num_packets > 1) {
1724 memmove(&matroska->packets[0], &matroska->packets[1],
1725 (matroska->num_packets - 1) * sizeof(AVPacket *));
1726 newpackets = av_realloc(matroska->packets,
1727 (matroska->num_packets - 1) * sizeof(AVPacket *));
1729 matroska->packets = newpackets;
1731 av_freep(&matroska->packets);
1732 matroska->prev_pkt = NULL;
1734 matroska->num_packets--;
1742 * Free all packets in our internal queue.
1744 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1746 if (matroska->packets) {
1748 for (n = 0; n < matroska->num_packets; n++) {
1749 av_free_packet(matroska->packets[n]);
1750 av_free(matroska->packets[n]);
1752 av_freep(&matroska->packets);
1753 matroska->num_packets = 0;
1757 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
1759 uint32_t **lace_buf, int *laces)
1762 uint8_t *data = *buf;
1763 uint32_t *lace_size;
1767 *lace_buf = av_mallocz(sizeof(int));
1769 return AVERROR(ENOMEM);
1771 *lace_buf[0] = size;
1779 lace_size = av_mallocz(*laces * sizeof(int));
1781 return AVERROR(ENOMEM);
1784 case 0x1: /* Xiph lacing */ {
1787 for (n = 0; res == 0 && n < *laces - 1; n++) {
1794 lace_size[n] += temp;
1800 total += lace_size[n];
1802 if (size <= total) {
1803 res = AVERROR_INVALIDDATA;
1807 lace_size[n] = size - total;
1811 case 0x2: /* fixed-size lacing */
1812 if (size % (*laces)) {
1813 res = AVERROR_INVALIDDATA;
1816 for (n = 0; n < *laces; n++)
1817 lace_size[n] = size / *laces;
1820 case 0x3: /* EBML lacing */ {
1823 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1825 av_log(matroska->ctx, AV_LOG_INFO,
1826 "EBML block data error\n");
1832 total = lace_size[0] = num;
1833 for (n = 1; res == 0 && n < *laces - 1; n++) {
1836 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1838 av_log(matroska->ctx, AV_LOG_INFO,
1839 "EBML block data error\n");
1845 lace_size[n] = lace_size[n - 1] + snum;
1846 total += lace_size[n];
1848 if (size <= total) {
1849 res = AVERROR_INVALIDDATA;
1852 lace_size[*laces - 1] = size - total;
1858 *lace_buf = lace_size;
1863 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
1864 MatroskaTrack *track,
1866 uint8_t *data, int size,
1867 uint64_t timecode, uint64_t duration,
1870 int a = st->codec->block_align;
1871 int sps = track->audio.sub_packet_size;
1872 int cfs = track->audio.coded_framesize;
1873 int h = track->audio.sub_packet_h;
1874 int y = track->audio.sub_packet_cnt;
1875 int w = track->audio.frame_size;
1878 if (!track->audio.pkt_cnt) {
1879 if (track->audio.sub_packet_cnt == 0)
1880 track->audio.buf_timecode = timecode;
1881 if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
1882 if (size < cfs * h / 2) {
1883 av_log(matroska->ctx, AV_LOG_ERROR,
1884 "Corrupt int4 RM-style audio packet size\n");
1885 return AVERROR_INVALIDDATA;
1887 for (x=0; x<h/2; x++)
1888 memcpy(track->audio.buf+x*2*w+y*cfs,
1890 } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
1892 av_log(matroska->ctx, AV_LOG_ERROR,
1893 "Corrupt sipr RM-style audio packet size\n");
1894 return AVERROR_INVALIDDATA;
1896 memcpy(track->audio.buf + y*w, data, w);
1898 if (size < sps * w / sps) {
1899 av_log(matroska->ctx, AV_LOG_ERROR,
1900 "Corrupt generic RM-style audio packet size\n");
1901 return AVERROR_INVALIDDATA;
1903 for (x=0; x<w/sps; x++)
1904 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1907 if (++track->audio.sub_packet_cnt >= h) {
1908 if (st->codec->codec_id == AV_CODEC_ID_SIPR)
1909 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
1910 track->audio.sub_packet_cnt = 0;
1911 track->audio.pkt_cnt = h*w / a;
1915 while (track->audio.pkt_cnt) {
1916 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
1917 av_new_packet(pkt, a);
1918 memcpy(pkt->data, track->audio.buf
1919 + a * (h*w / a - track->audio.pkt_cnt--), a);
1920 pkt->pts = track->audio.buf_timecode;
1921 track->audio.buf_timecode = AV_NOPTS_VALUE;
1923 pkt->stream_index = st->index;
1924 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1929 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
1930 MatroskaTrack *track,
1932 uint8_t *data, int pkt_size,
1933 uint64_t timecode, uint64_t duration,
1934 int64_t pos, int is_keyframe)
1936 MatroskaTrackEncoding *encodings = track->encodings.elem;
1937 uint8_t *pkt_data = data;
1938 int offset = 0, res;
1941 if (encodings && encodings->scope & 1) {
1942 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
1947 if (st->codec->codec_id == AV_CODEC_ID_PRORES)
1950 pkt = av_mallocz(sizeof(AVPacket));
1951 /* XXX: prevent data copy... */
1952 if (av_new_packet(pkt, pkt_size + offset) < 0) {
1954 return AVERROR(ENOMEM);
1957 if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
1958 uint8_t *buf = pkt->data;
1959 bytestream_put_be32(&buf, pkt_size);
1960 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
1963 memcpy(pkt->data + offset, pkt_data, pkt_size);
1965 if (pkt_data != data)
1968 pkt->flags = is_keyframe;
1969 pkt->stream_index = st->index;
1971 if (track->ms_compat)
1972 pkt->dts = timecode;
1974 pkt->pts = timecode;
1976 if (st->codec->codec_id == AV_CODEC_ID_TEXT)
1977 pkt->convergence_duration = duration;
1978 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
1979 pkt->duration = duration;
1981 if (st->codec->codec_id == AV_CODEC_ID_SSA)
1982 matroska_fix_ass_packet(matroska, pkt, duration);
1984 if (matroska->prev_pkt &&
1985 timecode != AV_NOPTS_VALUE &&
1986 matroska->prev_pkt->pts == timecode &&
1987 matroska->prev_pkt->stream_index == st->index &&
1988 st->codec->codec_id == AV_CODEC_ID_SSA)
1989 matroska_merge_packets(matroska->prev_pkt, pkt);
1991 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1992 matroska->prev_pkt = pkt;
1998 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1999 int size, int64_t pos, uint64_t cluster_time,
2000 uint64_t block_duration, int is_keyframe,
2001 int64_t cluster_pos)
2003 uint64_t timecode = AV_NOPTS_VALUE;
2004 MatroskaTrack *track;
2008 uint32_t *lace_size = NULL;
2009 int n, flags, laces = 0;
2010 uint64_t num, duration;
2012 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2013 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2019 track = matroska_find_track_by_num(matroska, num);
2020 if (!track || !track->stream) {
2021 av_log(matroska->ctx, AV_LOG_INFO,
2022 "Invalid stream %"PRIu64" or size %u\n", num, size);
2023 return AVERROR_INVALIDDATA;
2024 } else if (size <= 3)
2027 if (st->discard >= AVDISCARD_ALL)
2030 block_time = AV_RB16(data);
2034 if (is_keyframe == -1)
2035 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2037 if (cluster_time != (uint64_t)-1
2038 && (block_time >= 0 || cluster_time >= -block_time)) {
2039 timecode = cluster_time + block_time;
2040 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
2041 && timecode < track->end_timecode)
2042 is_keyframe = 0; /* overlapping subtitles are not key frame */
2044 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
2047 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2048 if (!is_keyframe || timecode < matroska->skip_to_timecode)
2050 matroska->skip_to_keyframe = 0;
2053 res = matroska_parse_laces(matroska, &data, size, (flags & 0x06) >> 1,
2054 &lace_size, &laces);
2059 if (block_duration != AV_NOPTS_VALUE) {
2060 duration = block_duration / laces;
2061 if (block_duration != duration * laces) {
2062 av_log(matroska->ctx, AV_LOG_WARNING,
2063 "Incorrect block_duration, possibly corrupted container");
2066 duration = track->default_duration / matroska->time_scale;
2067 block_duration = duration * laces;
2070 if (timecode != AV_NOPTS_VALUE)
2071 track->end_timecode =
2072 FFMAX(track->end_timecode, timecode + block_duration);
2074 for (n = 0; n < laces; n++) {
2075 if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2076 st->codec->codec_id == AV_CODEC_ID_COOK ||
2077 st->codec->codec_id == AV_CODEC_ID_SIPR ||
2078 st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2079 st->codec->block_align && track->audio.sub_packet_size) {
2081 res = matroska_parse_rm_audio(matroska, track, st, data, size,
2082 timecode, duration, pos);
2087 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2089 pos, !n? is_keyframe : 0);
2094 if (timecode != AV_NOPTS_VALUE)
2095 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2096 data += lace_size[n];
2097 size -= lace_size[n];
2105 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2107 EbmlList *blocks_list;
2108 MatroskaBlock *blocks;
2110 res = ebml_parse(matroska,
2111 matroska_cluster_incremental_parsing,
2112 &matroska->current_cluster);
2115 if (matroska->current_cluster_pos)
2116 ebml_level_end(matroska);
2117 ebml_free(matroska_cluster, &matroska->current_cluster);
2118 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2119 matroska->current_cluster_num_blocks = 0;
2120 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2121 matroska->prev_pkt = NULL;
2122 /* sizeof the ID which was already read */
2123 if (matroska->current_id)
2124 matroska->current_cluster_pos -= 4;
2125 res = ebml_parse(matroska,
2126 matroska_clusters_incremental,
2127 &matroska->current_cluster);
2128 /* Try parsing the block again. */
2130 res = ebml_parse(matroska,
2131 matroska_cluster_incremental_parsing,
2132 &matroska->current_cluster);
2136 matroska->current_cluster_num_blocks <
2137 matroska->current_cluster.blocks.nb_elem) {
2138 blocks_list = &matroska->current_cluster.blocks;
2139 blocks = blocks_list->elem;
2141 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2142 i = blocks_list->nb_elem - 1;
2143 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2144 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2145 if (!blocks[i].non_simple)
2146 blocks[i].duration = AV_NOPTS_VALUE;
2147 res = matroska_parse_block(matroska,
2148 blocks[i].bin.data, blocks[i].bin.size,
2150 matroska->current_cluster.timecode,
2151 blocks[i].duration, is_keyframe,
2152 matroska->current_cluster_pos);
2156 if (res < 0) matroska->done = 1;
2160 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2162 MatroskaCluster cluster = { 0 };
2163 EbmlList *blocks_list;
2164 MatroskaBlock *blocks;
2167 if (!matroska->contains_ssa)
2168 return matroska_parse_cluster_incremental(matroska);
2169 pos = avio_tell(matroska->ctx->pb);
2170 matroska->prev_pkt = NULL;
2171 if (matroska->current_id)
2172 pos -= 4; /* sizeof the ID which was already read */
2173 res = ebml_parse(matroska, matroska_clusters, &cluster);
2174 blocks_list = &cluster.blocks;
2175 blocks = blocks_list->elem;
2176 for (i=0; i<blocks_list->nb_elem && !res; i++)
2177 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2178 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2179 if (!blocks[i].non_simple)
2180 blocks[i].duration = AV_NOPTS_VALUE;
2181 res=matroska_parse_block(matroska,
2182 blocks[i].bin.data, blocks[i].bin.size,
2183 blocks[i].bin.pos, cluster.timecode,
2184 blocks[i].duration, is_keyframe,
2187 ebml_free(matroska_cluster, &cluster);
2188 if (res < 0) matroska->done = 1;
2192 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2194 MatroskaDemuxContext *matroska = s->priv_data;
2197 while (!ret && matroska_deliver_packet(matroska, pkt)) {
2200 ret = matroska_parse_cluster(matroska);
2203 if (ret == AVERROR_INVALIDDATA && pkt->data) {
2204 pkt->flags |= AV_PKT_FLAG_CORRUPT;
2211 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2212 int64_t timestamp, int flags)
2214 MatroskaDemuxContext *matroska = s->priv_data;
2215 MatroskaTrack *tracks = matroska->tracks.elem;
2216 AVStream *st = s->streams[stream_index];
2217 int i, index, index_sub, index_min;
2219 /* Parse the CUES now since we need the index data to seek. */
2220 if (matroska->cues_parsing_deferred) {
2221 matroska_parse_cues(matroska);
2222 matroska->cues_parsing_deferred = 0;
2225 if (!st->nb_index_entries)
2227 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2229 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2230 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
2231 matroska->current_id = 0;
2232 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2233 matroska->prev_pkt = NULL;
2234 matroska_clear_queue(matroska);
2235 if (matroska_parse_cluster(matroska) < 0)
2240 matroska_clear_queue(matroska);
2245 for (i=0; i < matroska->tracks.nb_elem; i++) {
2246 tracks[i].audio.pkt_cnt = 0;
2247 tracks[i].audio.sub_packet_cnt = 0;
2248 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2249 tracks[i].end_timecode = 0;
2250 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
2251 && !tracks[i].stream->discard != AVDISCARD_ALL) {
2252 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
2254 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
2255 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
2256 index_min = index_sub;
2260 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2261 matroska->current_id = 0;
2262 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2263 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2265 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2269 static int matroska_read_close(AVFormatContext *s)
2271 MatroskaDemuxContext *matroska = s->priv_data;
2272 MatroskaTrack *tracks = matroska->tracks.elem;
2275 matroska_clear_queue(matroska);
2277 for (n=0; n < matroska->tracks.nb_elem; n++)
2278 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2279 av_free(tracks[n].audio.buf);
2280 ebml_free(matroska_cluster, &matroska->current_cluster);
2281 ebml_free(matroska_segment, matroska);
2286 AVInputFormat ff_matroska_demuxer = {
2287 .name = "matroska,webm",
2288 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2289 .priv_data_size = sizeof(MatroskaDemuxContext),
2290 .read_probe = matroska_probe,
2291 .read_header = matroska_read_header,
2292 .read_packet = matroska_read_packet,
2293 .read_close = matroska_read_close,
2294 .read_seek = matroska_read_seek,