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/mpeg4audio.h"
41 #include "libavutil/intfloat.h"
42 #include "libavutil/intreadwrite.h"
43 #include "libavutil/avstring.h"
44 #include "libavutil/lzo.h"
45 #include "libavutil/dict.h"
66 typedef const struct EbmlSyntax {
75 const struct EbmlSyntax *n;
95 uint64_t doctype_version;
101 } MatroskaTrackCompression;
106 MatroskaTrackCompression compression;
107 } MatroskaTrackEncoding;
111 uint64_t display_width;
112 uint64_t display_height;
113 uint64_t pixel_width;
114 uint64_t pixel_height;
116 } MatroskaTrackVideo;
120 double out_samplerate;
124 /* real audio header (extracted from extradata) */
131 uint64_t buf_timecode;
133 } MatroskaTrackAudio;
144 uint64_t default_duration;
145 uint64_t flag_default;
146 uint64_t flag_forced;
147 MatroskaTrackVideo video;
148 MatroskaTrackAudio audio;
152 int64_t end_timecode;
163 } MatroskaAttachement;
201 MatroskaTagTarget target;
221 AVFormatContext *ctx;
225 MatroskaLevel levels[EBML_MAX_DEPTH];
233 EbmlList attachments;
239 /* byte position of the segment inside the stream */
240 int64_t segment_start;
242 /* the packet queue */
249 /* What to skip before effectively reading a packet. */
250 int skip_to_keyframe;
251 uint64_t skip_to_timecode;
253 /* File has a CUES element, but we defer parsing until it is needed. */
254 int cues_parsing_deferred;
256 int current_cluster_num_blocks;
257 int64_t current_cluster_pos;
258 MatroskaCluster current_cluster;
260 /* File has SSA subtitles which prevent incremental cluster parsing. */
262 } MatroskaDemuxContext;
271 static EbmlSyntax ebml_header[] = {
272 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
273 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
274 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
275 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
276 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
277 { EBML_ID_EBMLVERSION, EBML_NONE },
278 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
282 static EbmlSyntax ebml_syntax[] = {
283 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
287 static EbmlSyntax matroska_info[] = {
288 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
289 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
290 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
291 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
292 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
293 { MATROSKA_ID_DATEUTC, EBML_NONE },
294 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
298 static EbmlSyntax matroska_track_video[] = {
299 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
300 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
301 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
302 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
303 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
304 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) },
305 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
306 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
307 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
308 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
309 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
310 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
311 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE },
312 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
316 static EbmlSyntax matroska_track_audio[] = {
317 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
318 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
319 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
320 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
324 static EbmlSyntax matroska_track_encoding_compression[] = {
325 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
326 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
330 static EbmlSyntax matroska_track_encoding[] = {
331 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
332 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
333 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
334 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
338 static EbmlSyntax matroska_track_encodings[] = {
339 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
343 static EbmlSyntax matroska_track[] = {
344 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
345 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
346 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
347 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
348 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
349 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
350 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
351 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
352 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
353 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
354 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
355 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
356 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
357 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
358 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
359 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
360 { MATROSKA_ID_CODECNAME, EBML_NONE },
361 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
362 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
363 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
364 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
365 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
366 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
370 static EbmlSyntax matroska_tracks[] = {
371 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
375 static EbmlSyntax matroska_attachment[] = {
376 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
377 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
378 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
379 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
380 { MATROSKA_ID_FILEDESC, EBML_NONE },
384 static EbmlSyntax matroska_attachments[] = {
385 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
389 static EbmlSyntax matroska_chapter_display[] = {
390 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
391 { MATROSKA_ID_CHAPLANG, EBML_NONE },
395 static EbmlSyntax matroska_chapter_entry[] = {
396 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
397 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
398 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
399 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
400 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
401 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
402 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
403 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
407 static EbmlSyntax matroska_chapter[] = {
408 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
409 { MATROSKA_ID_EDITIONUID, EBML_NONE },
410 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
411 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
412 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
416 static EbmlSyntax matroska_chapters[] = {
417 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
421 static EbmlSyntax matroska_index_pos[] = {
422 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
423 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
424 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
428 static EbmlSyntax matroska_index_entry[] = {
429 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
430 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
434 static EbmlSyntax matroska_index[] = {
435 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
439 static EbmlSyntax matroska_simpletag[] = {
440 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
441 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
442 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
443 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
444 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
445 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
449 static EbmlSyntax matroska_tagtargets[] = {
450 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
451 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
452 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
453 { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
454 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
458 static EbmlSyntax matroska_tag[] = {
459 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
460 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
464 static EbmlSyntax matroska_tags[] = {
465 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
469 static EbmlSyntax matroska_seekhead_entry[] = {
470 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
471 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
475 static EbmlSyntax matroska_seekhead[] = {
476 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
480 static EbmlSyntax matroska_segment[] = {
481 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
482 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
483 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
484 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
485 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
486 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
487 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
488 { MATROSKA_ID_CLUSTER, EBML_STOP },
492 static EbmlSyntax matroska_segments[] = {
493 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
497 static EbmlSyntax matroska_blockgroup[] = {
498 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
499 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
500 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
501 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
502 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
506 static EbmlSyntax matroska_cluster[] = {
507 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
508 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
509 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
510 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
511 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
515 static EbmlSyntax matroska_clusters[] = {
516 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
517 { MATROSKA_ID_INFO, EBML_NONE },
518 { MATROSKA_ID_CUES, EBML_NONE },
519 { MATROSKA_ID_TAGS, EBML_NONE },
520 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
524 static EbmlSyntax matroska_cluster_incremental_parsing[] = {
525 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
526 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
527 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
528 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
529 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
530 { MATROSKA_ID_INFO, EBML_NONE },
531 { MATROSKA_ID_CUES, EBML_NONE },
532 { MATROSKA_ID_TAGS, EBML_NONE },
533 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
534 { MATROSKA_ID_CLUSTER, EBML_STOP },
538 static EbmlSyntax matroska_cluster_incremental[] = {
539 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
540 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
541 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
542 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
543 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
547 static EbmlSyntax matroska_clusters_incremental[] = {
548 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster_incremental} },
549 { MATROSKA_ID_INFO, EBML_NONE },
550 { MATROSKA_ID_CUES, EBML_NONE },
551 { MATROSKA_ID_TAGS, EBML_NONE },
552 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
556 static const char *const matroska_doctypes[] = { "matroska", "webm" };
559 * Return: Whether we reached the end of a level in the hierarchy or not.
561 static int ebml_level_end(MatroskaDemuxContext *matroska)
563 AVIOContext *pb = matroska->ctx->pb;
564 int64_t pos = avio_tell(pb);
566 if (matroska->num_levels > 0) {
567 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
568 if (pos - level->start >= level->length || matroska->current_id) {
569 matroska->num_levels--;
577 * Read: an "EBML number", which is defined as a variable-length
578 * array of bytes. The first byte indicates the length by giving a
579 * number of 0-bits followed by a one. The position of the first
580 * "one" bit inside the first byte indicates the length of this
582 * Returns: number of bytes read, < 0 on error
584 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
585 int max_size, uint64_t *number)
590 /* The first byte tells us the length in bytes - avio_r8() can normally
591 * return 0, but since that's not a valid first ebmlID byte, we can
592 * use it safely here to catch EOS. */
593 if (!(total = avio_r8(pb))) {
594 /* we might encounter EOS here */
595 if (!pb->eof_reached) {
596 int64_t pos = avio_tell(pb);
597 av_log(matroska->ctx, AV_LOG_ERROR,
598 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
601 return AVERROR(EIO); /* EOS or actual I/O error */
604 /* get the length of the EBML number */
605 read = 8 - ff_log2_tab[total];
606 if (read > max_size) {
607 int64_t pos = avio_tell(pb) - 1;
608 av_log(matroska->ctx, AV_LOG_ERROR,
609 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
610 (uint8_t) total, pos, pos);
611 return AVERROR_INVALIDDATA;
614 /* read out length */
615 total ^= 1 << ff_log2_tab[total];
617 total = (total << 8) | avio_r8(pb);
625 * Read a EBML length value.
626 * This needs special handling for the "unknown length" case which has multiple
629 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
632 int res = ebml_read_num(matroska, pb, 8, number);
633 if (res > 0 && *number + 1 == 1ULL << (7 * res))
634 *number = 0xffffffffffffffULL;
639 * Read the next element as an unsigned int.
640 * 0 is success, < 0 is failure.
642 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
647 return AVERROR_INVALIDDATA;
649 /* big-endian ordering; build up number */
652 *num = (*num << 8) | avio_r8(pb);
658 * Read the next element as a float.
659 * 0 is success, < 0 is failure.
661 static int ebml_read_float(AVIOContext *pb, int size, double *num)
665 } else if (size == 4) {
666 *num = av_int2float(avio_rb32(pb));
667 } else if (size == 8){
668 *num = av_int2double(avio_rb64(pb));
670 return AVERROR_INVALIDDATA;
676 * Read the next element as an ASCII string.
677 * 0 is success, < 0 is failure.
679 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
683 /* EBML strings are usually not 0-terminated, so we allocate one
684 * byte more, read the string and NULL-terminate it ourselves. */
685 if (!(res = av_malloc(size + 1)))
686 return AVERROR(ENOMEM);
687 if (avio_read(pb, (uint8_t *) res, size) != size) {
699 * Read the next element as binary data.
700 * 0 is success, < 0 is failure.
702 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
705 if (!(bin->data = av_malloc(length)))
706 return AVERROR(ENOMEM);
709 bin->pos = avio_tell(pb);
710 if (avio_read(pb, bin->data, length) != length) {
711 av_freep(&bin->data);
719 * Read the next element, but only the header. The contents
720 * are supposed to be sub-elements which can be read separately.
721 * 0 is success, < 0 is failure.
723 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
725 AVIOContext *pb = matroska->ctx->pb;
726 MatroskaLevel *level;
728 if (matroska->num_levels >= EBML_MAX_DEPTH) {
729 av_log(matroska->ctx, AV_LOG_ERROR,
730 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
731 return AVERROR(ENOSYS);
734 level = &matroska->levels[matroska->num_levels++];
735 level->start = avio_tell(pb);
736 level->length = length;
742 * Read signed/unsigned "EBML" numbers.
743 * Return: number of bytes processed, < 0 on error
745 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
746 uint8_t *data, uint32_t size, uint64_t *num)
749 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
750 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
754 * Same as above, but signed.
756 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
757 uint8_t *data, uint32_t size, int64_t *num)
762 /* read as unsigned number first */
763 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
766 /* make signed (weird way) */
767 *num = unum - ((1LL << (7*res - 1)) - 1);
772 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
773 EbmlSyntax *syntax, void *data);
775 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
776 uint32_t id, void *data)
779 for (i=0; syntax[i].id; i++)
780 if (id == syntax[i].id)
782 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
783 matroska->num_levels > 0 &&
784 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
785 return 0; // we reached the end of an unknown size cluster
786 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32)
787 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
788 return ebml_parse_elem(matroska, &syntax[i], data);
791 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
794 if (!matroska->current_id) {
796 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
799 matroska->current_id = id | 1 << 7*res;
801 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
804 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
809 for (i=0; syntax[i].id; i++)
810 switch (syntax[i].type) {
812 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
815 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
819 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
823 while (!res && !ebml_level_end(matroska))
824 res = ebml_parse(matroska, syntax, data);
829 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
830 EbmlSyntax *syntax, void *data)
832 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
835 // max. 16 MB for strings
836 [EBML_STR] = 0x1000000,
837 [EBML_UTF8] = 0x1000000,
838 // max. 256 MB for binary data
839 [EBML_BIN] = 0x10000000,
840 // no limits for anything else
842 AVIOContext *pb = matroska->ctx->pb;
843 uint32_t id = syntax->id;
848 data = (char *)data + syntax->data_offset;
849 if (syntax->list_elem_size) {
850 EbmlList *list = data;
851 newelem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
853 return AVERROR(ENOMEM);
854 list->elem = newelem;
855 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
856 memset(data, 0, syntax->list_elem_size);
860 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
861 matroska->current_id = 0;
862 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
864 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
865 av_log(matroska->ctx, AV_LOG_ERROR,
866 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
867 length, max_lengths[syntax->type], syntax->type);
868 return AVERROR_INVALIDDATA;
872 switch (syntax->type) {
873 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
874 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
876 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
877 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
878 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
880 if (id == MATROSKA_ID_SEGMENT)
881 matroska->segment_start = avio_tell(matroska->ctx->pb);
882 return ebml_parse_nest(matroska, syntax->def.n, data);
883 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
884 case EBML_STOP: return 1;
885 default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
887 if (res == AVERROR_INVALIDDATA)
888 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
889 else if (res == AVERROR(EIO))
890 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
894 static void ebml_free(EbmlSyntax *syntax, void *data)
897 for (i=0; syntax[i].id; i++) {
898 void *data_off = (char *)data + syntax[i].data_offset;
899 switch (syntax[i].type) {
901 case EBML_UTF8: av_freep(data_off); break;
902 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
904 if (syntax[i].list_elem_size) {
905 EbmlList *list = data_off;
906 char *ptr = list->elem;
907 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
908 ebml_free(syntax[i].def.n, ptr);
911 ebml_free(syntax[i].def.n, data_off);
921 static int matroska_probe(AVProbeData *p)
924 int len_mask = 0x80, size = 1, n = 1, i;
927 if (AV_RB32(p->buf) != EBML_ID_HEADER)
930 /* length of header */
932 while (size <= 8 && !(total & len_mask)) {
938 total &= (len_mask - 1);
940 total = (total << 8) | p->buf[4 + n++];
942 /* Does the probe data contain the whole header? */
943 if (p->buf_size < 4 + size + total)
946 /* The header should contain a known document type. For now,
947 * we don't parse the whole header but simply check for the
948 * availability of that array of characters inside the header.
949 * Not fully fool-proof, but good enough. */
950 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
951 int probelen = strlen(matroska_doctypes[i]);
952 if (total < probelen)
954 for (n = 4+size; n <= 4+size+total-probelen; n++)
955 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
956 return AVPROBE_SCORE_MAX;
959 // probably valid EBML header but no recognized doctype
960 return AVPROBE_SCORE_MAX/2;
963 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
966 MatroskaTrack *tracks = matroska->tracks.elem;
969 for (i=0; i < matroska->tracks.nb_elem; i++)
970 if (tracks[i].num == num)
973 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
977 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
978 MatroskaTrack *track)
980 MatroskaTrackEncoding *encodings = track->encodings.elem;
981 uint8_t* data = *buf;
982 int isize = *buf_size;
983 uint8_t* pkt_data = NULL;
984 uint8_t av_unused *newpktdata;
985 int pkt_size = isize;
989 if (pkt_size >= 10000000)
992 switch (encodings[0].compression.algo) {
993 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
994 return encodings[0].compression.settings.size;
995 case MATROSKA_TRACK_ENCODING_COMP_LZO:
997 olen = pkt_size *= 3;
998 pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
999 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1000 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
1006 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
1007 z_stream zstream = {0};
1008 if (inflateInit(&zstream) != Z_OK)
1010 zstream.next_in = data;
1011 zstream.avail_in = isize;
1014 newpktdata = av_realloc(pkt_data, pkt_size);
1016 inflateEnd(&zstream);
1019 pkt_data = newpktdata;
1020 zstream.avail_out = pkt_size - zstream.total_out;
1021 zstream.next_out = pkt_data + zstream.total_out;
1022 result = inflate(&zstream, Z_NO_FLUSH);
1023 } while (result==Z_OK && pkt_size<10000000);
1024 pkt_size = zstream.total_out;
1025 inflateEnd(&zstream);
1026 if (result != Z_STREAM_END)
1032 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
1033 bz_stream bzstream = {0};
1034 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1036 bzstream.next_in = data;
1037 bzstream.avail_in = isize;
1040 newpktdata = av_realloc(pkt_data, pkt_size);
1042 BZ2_bzDecompressEnd(&bzstream);
1045 pkt_data = newpktdata;
1046 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1047 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1048 result = BZ2_bzDecompress(&bzstream);
1049 } while (result==BZ_OK && pkt_size<10000000);
1050 pkt_size = bzstream.total_out_lo32;
1051 BZ2_bzDecompressEnd(&bzstream);
1052 if (result != BZ_STREAM_END)
1062 *buf_size = pkt_size;
1069 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1070 AVPacket *pkt, uint64_t display_duration)
1072 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
1073 for (; *ptr!=',' && ptr<end-1; ptr++);
1076 for (; *ptr!=',' && ptr<end-1; ptr++);
1078 int64_t end_pts = pkt->pts + display_duration;
1079 int sc = matroska->time_scale * pkt->pts / 10000000;
1080 int ec = matroska->time_scale * end_pts / 10000000;
1081 int sh, sm, ss, eh, em, es, len;
1082 sh = sc/360000; sc -= 360000*sh;
1083 sm = sc/ 6000; sc -= 6000*sm;
1084 ss = sc/ 100; sc -= 100*ss;
1085 eh = ec/360000; ec -= 360000*eh;
1086 em = ec/ 6000; ec -= 6000*em;
1087 es = ec/ 100; ec -= 100*es;
1089 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1090 if (!(line = av_malloc(len)))
1092 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1093 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1096 pkt->size = strlen(line);
1100 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1102 void *newdata = av_realloc(out->data, out->size+in->size);
1104 return AVERROR(ENOMEM);
1105 out->data = newdata;
1106 memcpy(out->data+out->size, in->data, in->size);
1107 out->size += in->size;
1108 av_destruct_packet(in);
1113 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1114 AVDictionary **metadata, char *prefix)
1116 MatroskaTag *tags = list->elem;
1120 for (i=0; i < list->nb_elem; i++) {
1121 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1123 if (!tags[i].name) {
1124 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1127 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1128 else av_strlcpy(key, tags[i].name, sizeof(key));
1129 if (tags[i].def || !lang) {
1130 av_dict_set(metadata, key, tags[i].string, 0);
1131 if (tags[i].sub.nb_elem)
1132 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1135 av_strlcat(key, "-", sizeof(key));
1136 av_strlcat(key, lang, sizeof(key));
1137 av_dict_set(metadata, key, tags[i].string, 0);
1138 if (tags[i].sub.nb_elem)
1139 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1142 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1145 static void matroska_convert_tags(AVFormatContext *s)
1147 MatroskaDemuxContext *matroska = s->priv_data;
1148 MatroskaTags *tags = matroska->tags.elem;
1151 for (i=0; i < matroska->tags.nb_elem; i++) {
1152 if (tags[i].target.attachuid) {
1153 MatroskaAttachement *attachment = matroska->attachments.elem;
1154 for (j=0; j<matroska->attachments.nb_elem; j++)
1155 if (attachment[j].uid == tags[i].target.attachuid
1156 && attachment[j].stream)
1157 matroska_convert_tag(s, &tags[i].tag,
1158 &attachment[j].stream->metadata, NULL);
1159 } else if (tags[i].target.chapteruid) {
1160 MatroskaChapter *chapter = matroska->chapters.elem;
1161 for (j=0; j<matroska->chapters.nb_elem; j++)
1162 if (chapter[j].uid == tags[i].target.chapteruid
1163 && chapter[j].chapter)
1164 matroska_convert_tag(s, &tags[i].tag,
1165 &chapter[j].chapter->metadata, NULL);
1166 } else if (tags[i].target.trackuid) {
1167 MatroskaTrack *track = matroska->tracks.elem;
1168 for (j=0; j<matroska->tracks.nb_elem; j++)
1169 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1170 matroska_convert_tag(s, &tags[i].tag,
1171 &track[j].stream->metadata, NULL);
1173 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1174 tags[i].target.type);
1179 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
1181 EbmlList *seekhead_list = &matroska->seekhead;
1182 MatroskaSeekhead *seekhead = seekhead_list->elem;
1183 uint32_t level_up = matroska->level_up;
1184 int64_t before_pos = avio_tell(matroska->ctx->pb);
1185 uint32_t saved_id = matroska->current_id;
1186 MatroskaLevel level;
1190 if (idx >= seekhead_list->nb_elem
1191 || seekhead[idx].id == MATROSKA_ID_SEEKHEAD
1192 || seekhead[idx].id == MATROSKA_ID_CLUSTER)
1196 offset = seekhead[idx].pos + matroska->segment_start;
1197 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1198 /* We don't want to lose our seekhead level, so we add
1199 * a dummy. This is a crude hack. */
1200 if (matroska->num_levels == EBML_MAX_DEPTH) {
1201 av_log(matroska->ctx, AV_LOG_INFO,
1202 "Max EBML element depth (%d) reached, "
1203 "cannot parse further.\n", EBML_MAX_DEPTH);
1204 ret = AVERROR_INVALIDDATA;
1207 level.length = (uint64_t)-1;
1208 matroska->levels[matroska->num_levels] = level;
1209 matroska->num_levels++;
1210 matroska->current_id = 0;
1212 ret = ebml_parse(matroska, matroska_segment, matroska);
1214 /* remove dummy level */
1215 while (matroska->num_levels) {
1216 uint64_t length = matroska->levels[--matroska->num_levels].length;
1217 if (length == (uint64_t)-1)
1223 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1224 matroska->level_up = level_up;
1225 matroska->current_id = saved_id;
1230 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1232 EbmlList *seekhead_list = &matroska->seekhead;
1233 int64_t before_pos = avio_tell(matroska->ctx->pb);
1236 // we should not do any seeking in the streaming case
1237 if (!matroska->ctx->pb->seekable ||
1238 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1241 for (i = 0; i < seekhead_list->nb_elem; i++) {
1242 MatroskaSeekhead *seekhead = seekhead_list->elem;
1243 if (seekhead[i].pos <= before_pos)
1246 // defer cues parsing until we actually need cue data.
1247 if (seekhead[i].id == MATROSKA_ID_CUES) {
1248 matroska->cues_parsing_deferred = 1;
1252 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1257 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1258 EbmlList *seekhead_list = &matroska->seekhead;
1259 MatroskaSeekhead *seekhead = seekhead_list->elem;
1260 EbmlList *index_list;
1261 MatroskaIndex *index;
1262 int index_scale = 1;
1265 for (i = 0; i < seekhead_list->nb_elem; i++)
1266 if (seekhead[i].id == MATROSKA_ID_CUES)
1268 assert(i <= seekhead_list->nb_elem);
1270 matroska_parse_seekhead_entry(matroska, i);
1272 index_list = &matroska->index;
1273 index = index_list->elem;
1274 if (index_list->nb_elem
1275 && index[0].time > 1E14/matroska->time_scale) {
1276 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1277 index_scale = matroska->time_scale;
1279 for (i = 0; i < index_list->nb_elem; i++) {
1280 EbmlList *pos_list = &index[i].pos;
1281 MatroskaIndexPos *pos = pos_list->elem;
1282 for (j = 0; j < pos_list->nb_elem; j++) {
1283 MatroskaTrack *track = matroska_find_track_by_num(matroska, pos[j].track);
1284 if (track && track->stream)
1285 av_add_index_entry(track->stream,
1286 pos[j].pos + matroska->segment_start,
1287 index[i].time/index_scale, 0, 0,
1293 static int matroska_aac_profile(char *codec_id)
1295 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1298 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1299 if (strstr(codec_id, aac_profiles[profile]))
1304 static int matroska_aac_sri(int samplerate)
1308 for (sri=0; sri<FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1309 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1314 static int matroska_read_header(AVFormatContext *s)
1316 MatroskaDemuxContext *matroska = s->priv_data;
1317 EbmlList *attachements_list = &matroska->attachments;
1318 MatroskaAttachement *attachements;
1319 EbmlList *chapters_list = &matroska->chapters;
1320 MatroskaChapter *chapters;
1321 MatroskaTrack *tracks;
1322 uint64_t max_start = 0;
1329 /* First read the EBML header. */
1330 if (ebml_parse(matroska, ebml_syntax, &ebml)
1331 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1332 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) {
1333 av_log(matroska->ctx, AV_LOG_ERROR,
1334 "EBML header using unsupported features\n"
1335 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1336 ebml.version, ebml.doctype, ebml.doctype_version);
1337 ebml_free(ebml_syntax, &ebml);
1338 return AVERROR_PATCHWELCOME;
1340 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1341 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1343 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1344 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1346 ebml_free(ebml_syntax, &ebml);
1348 /* The next thing is a segment. */
1349 if ((res = ebml_parse(matroska, matroska_segments, matroska)) < 0)
1351 matroska_execute_seekhead(matroska);
1353 if (!matroska->time_scale)
1354 matroska->time_scale = 1000000;
1355 if (matroska->duration)
1356 matroska->ctx->duration = matroska->duration * matroska->time_scale
1357 * 1000 / AV_TIME_BASE;
1358 av_dict_set(&s->metadata, "title", matroska->title, 0);
1360 tracks = matroska->tracks.elem;
1361 for (i=0; i < matroska->tracks.nb_elem; i++) {
1362 MatroskaTrack *track = &tracks[i];
1363 enum CodecID codec_id = CODEC_ID_NONE;
1364 EbmlList *encodings_list = &tracks->encodings;
1365 MatroskaTrackEncoding *encodings = encodings_list->elem;
1366 uint8_t *extradata = NULL;
1367 int extradata_size = 0;
1368 int extradata_offset = 0;
1371 /* Apply some sanity checks. */
1372 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1373 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1374 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1375 av_log(matroska->ctx, AV_LOG_INFO,
1376 "Unknown or unsupported track type %"PRIu64"\n",
1380 if (track->codec_id == NULL)
1383 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1384 if (!track->default_duration && track->video.frame_rate > 0)
1385 track->default_duration = 1000000000/track->video.frame_rate;
1386 if (!track->video.display_width)
1387 track->video.display_width = track->video.pixel_width;
1388 if (!track->video.display_height)
1389 track->video.display_height = track->video.pixel_height;
1390 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1391 if (!track->audio.out_samplerate)
1392 track->audio.out_samplerate = track->audio.samplerate;
1394 if (encodings_list->nb_elem > 1) {
1395 av_log(matroska->ctx, AV_LOG_ERROR,
1396 "Multiple combined encodings not supported");
1397 } else if (encodings_list->nb_elem == 1) {
1398 if (encodings[0].type ||
1399 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1401 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1404 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1406 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1407 encodings[0].scope = 0;
1408 av_log(matroska->ctx, AV_LOG_ERROR,
1409 "Unsupported encoding type");
1410 } else if (track->codec_priv.size && encodings[0].scope&2) {
1411 uint8_t *codec_priv = track->codec_priv.data;
1412 int offset = matroska_decode_buffer(&track->codec_priv.data,
1413 &track->codec_priv.size,
1416 track->codec_priv.data = NULL;
1417 track->codec_priv.size = 0;
1418 av_log(matroska->ctx, AV_LOG_ERROR,
1419 "Failed to decode codec private data\n");
1420 } else if (offset > 0) {
1421 track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1422 memcpy(track->codec_priv.data,
1423 encodings[0].compression.settings.data, offset);
1424 memcpy(track->codec_priv.data+offset, codec_priv,
1425 track->codec_priv.size);
1426 track->codec_priv.size += offset;
1428 if (codec_priv != track->codec_priv.data)
1429 av_free(codec_priv);
1433 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1434 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1435 strlen(ff_mkv_codec_tags[j].str))){
1436 codec_id= ff_mkv_codec_tags[j].id;
1441 st = track->stream = avformat_new_stream(s, NULL);
1443 return AVERROR(ENOMEM);
1445 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1446 && track->codec_priv.size >= 40
1447 && track->codec_priv.data != NULL) {
1448 track->ms_compat = 1;
1449 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1450 codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc);
1451 extradata_offset = 40;
1452 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1453 && track->codec_priv.size >= 14
1454 && track->codec_priv.data != NULL) {
1456 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1457 AVIO_FLAG_READ, NULL, NULL, NULL, NULL);
1458 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1461 codec_id = st->codec->codec_id;
1462 extradata_offset = FFMIN(track->codec_priv.size, 18);
1463 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1464 && (track->codec_priv.size >= 86)
1465 && (track->codec_priv.data != NULL)) {
1466 track->video.fourcc = AV_RL32(track->codec_priv.data);
1467 codec_id=ff_codec_get_id(ff_codec_movvideo_tags, track->video.fourcc);
1468 } else if (codec_id == CODEC_ID_PCM_S16BE) {
1469 switch (track->audio.bitdepth) {
1470 case 8: codec_id = CODEC_ID_PCM_U8; break;
1471 case 24: codec_id = CODEC_ID_PCM_S24BE; break;
1472 case 32: codec_id = CODEC_ID_PCM_S32BE; break;
1474 } else if (codec_id == CODEC_ID_PCM_S16LE) {
1475 switch (track->audio.bitdepth) {
1476 case 8: codec_id = CODEC_ID_PCM_U8; break;
1477 case 24: codec_id = CODEC_ID_PCM_S24LE; break;
1478 case 32: codec_id = CODEC_ID_PCM_S32LE; break;
1480 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1481 codec_id = CODEC_ID_PCM_F64LE;
1482 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1483 int profile = matroska_aac_profile(track->codec_id);
1484 int sri = matroska_aac_sri(track->audio.samplerate);
1485 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1486 if (extradata == NULL)
1487 return AVERROR(ENOMEM);
1488 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1489 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1490 if (strstr(track->codec_id, "SBR")) {
1491 sri = matroska_aac_sri(track->audio.out_samplerate);
1492 extradata[2] = 0x56;
1493 extradata[3] = 0xE5;
1494 extradata[4] = 0x80 | (sri<<3);
1498 } else if (codec_id == CODEC_ID_TTA) {
1499 extradata_size = 30;
1500 extradata = av_mallocz(extradata_size);
1501 if (extradata == NULL)
1502 return AVERROR(ENOMEM);
1503 ffio_init_context(&b, extradata, extradata_size, 1,
1504 NULL, NULL, NULL, NULL);
1505 avio_write(&b, "TTA1", 4);
1507 avio_wl16(&b, track->audio.channels);
1508 avio_wl16(&b, track->audio.bitdepth);
1509 avio_wl32(&b, track->audio.out_samplerate);
1510 avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1511 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1512 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1513 extradata_offset = 26;
1514 } else if (codec_id == CODEC_ID_RA_144) {
1515 track->audio.out_samplerate = 8000;
1516 track->audio.channels = 1;
1517 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1518 codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) {
1520 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
1521 0, NULL, NULL, NULL, NULL);
1523 flavor = avio_rb16(&b);
1524 track->audio.coded_framesize = avio_rb32(&b);
1526 track->audio.sub_packet_h = avio_rb16(&b);
1527 track->audio.frame_size = avio_rb16(&b);
1528 track->audio.sub_packet_size = avio_rb16(&b);
1529 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1530 if (codec_id == CODEC_ID_RA_288) {
1531 st->codec->block_align = track->audio.coded_framesize;
1532 track->codec_priv.size = 0;
1534 if (codec_id == CODEC_ID_SIPR && flavor < 4) {
1535 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1536 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1537 st->codec->bit_rate = sipr_bit_rate[flavor];
1539 st->codec->block_align = track->audio.sub_packet_size;
1540 extradata_offset = 78;
1543 track->codec_priv.size -= extradata_offset;
1545 if (codec_id == CODEC_ID_NONE)
1546 av_log(matroska->ctx, AV_LOG_INFO,
1547 "Unknown/unsupported CodecID %s.\n", track->codec_id);
1549 if (track->time_scale < 0.01)
1550 track->time_scale = 1.0;
1551 avpriv_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1553 st->codec->codec_id = codec_id;
1555 if (strcmp(track->language, "und"))
1556 av_dict_set(&st->metadata, "language", track->language, 0);
1557 av_dict_set(&st->metadata, "title", track->name, 0);
1559 if (track->flag_default)
1560 st->disposition |= AV_DISPOSITION_DEFAULT;
1561 if (track->flag_forced)
1562 st->disposition |= AV_DISPOSITION_FORCED;
1564 if (!st->codec->extradata) {
1566 st->codec->extradata = extradata;
1567 st->codec->extradata_size = extradata_size;
1568 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1569 st->codec->extradata = av_mallocz(track->codec_priv.size +
1570 FF_INPUT_BUFFER_PADDING_SIZE);
1571 if(st->codec->extradata == NULL)
1572 return AVERROR(ENOMEM);
1573 st->codec->extradata_size = track->codec_priv.size;
1574 memcpy(st->codec->extradata,
1575 track->codec_priv.data + extradata_offset,
1576 track->codec_priv.size);
1580 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1581 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1582 st->codec->codec_tag = track->video.fourcc;
1583 st->codec->width = track->video.pixel_width;
1584 st->codec->height = track->video.pixel_height;
1585 av_reduce(&st->sample_aspect_ratio.num,
1586 &st->sample_aspect_ratio.den,
1587 st->codec->height * track->video.display_width,
1588 st->codec-> width * track->video.display_height,
1590 if (st->codec->codec_id != CODEC_ID_H264)
1591 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1592 if (track->default_duration) {
1593 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
1594 1000000000, track->default_duration, 30000);
1595 st->avg_frame_rate = st->r_frame_rate;
1597 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1598 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1599 st->codec->sample_rate = track->audio.out_samplerate;
1600 st->codec->channels = track->audio.channels;
1601 if (st->codec->codec_id != CODEC_ID_AAC)
1602 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1603 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1604 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1605 if (st->codec->codec_id == CODEC_ID_SSA)
1606 matroska->contains_ssa = 1;
1610 attachements = attachements_list->elem;
1611 for (j=0; j<attachements_list->nb_elem; j++) {
1612 if (!(attachements[j].filename && attachements[j].mime &&
1613 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1614 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1616 AVStream *st = avformat_new_stream(s, NULL);
1619 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
1620 av_dict_set(&st->metadata, "mimetype", attachements[j].mime, 0);
1621 st->codec->codec_id = CODEC_ID_NONE;
1622 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1623 st->codec->extradata = av_malloc(attachements[j].bin.size);
1624 if(st->codec->extradata == NULL)
1626 st->codec->extradata_size = attachements[j].bin.size;
1627 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1629 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1630 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1631 strlen(ff_mkv_mime_tags[i].str))) {
1632 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1636 attachements[j].stream = st;
1640 chapters = chapters_list->elem;
1641 for (i=0; i<chapters_list->nb_elem; i++)
1642 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1643 && (max_start==0 || chapters[i].start > max_start)) {
1644 chapters[i].chapter =
1645 avpriv_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1646 chapters[i].start, chapters[i].end,
1648 av_dict_set(&chapters[i].chapter->metadata,
1649 "title", chapters[i].title, 0);
1650 max_start = chapters[i].start;
1653 matroska_convert_tags(s);
1659 * Put one packet in an application-supplied AVPacket struct.
1660 * Returns 0 on success or -1 on failure.
1662 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1665 if (matroska->num_packets > 0) {
1666 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1667 av_free(matroska->packets[0]);
1668 if (matroska->num_packets > 1) {
1670 memmove(&matroska->packets[0], &matroska->packets[1],
1671 (matroska->num_packets - 1) * sizeof(AVPacket *));
1672 newpackets = av_realloc(matroska->packets,
1673 (matroska->num_packets - 1) * sizeof(AVPacket *));
1675 matroska->packets = newpackets;
1677 av_freep(&matroska->packets);
1678 matroska->prev_pkt = NULL;
1680 matroska->num_packets--;
1688 * Free all packets in our internal queue.
1690 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1692 if (matroska->packets) {
1694 for (n = 0; n < matroska->num_packets; n++) {
1695 av_free_packet(matroska->packets[n]);
1696 av_free(matroska->packets[n]);
1698 av_freep(&matroska->packets);
1699 matroska->num_packets = 0;
1703 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1704 int size, int64_t pos, uint64_t cluster_time,
1705 uint64_t duration, int is_keyframe,
1706 int64_t cluster_pos)
1708 uint64_t timecode = AV_NOPTS_VALUE;
1709 MatroskaTrack *track;
1714 uint32_t *lace_size = NULL;
1715 int n, flags, laces = 0;
1718 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
1719 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1725 track = matroska_find_track_by_num(matroska, num);
1726 if (!track || !track->stream) {
1727 av_log(matroska->ctx, AV_LOG_INFO,
1728 "Invalid stream %"PRIu64" or size %u\n", num, size);
1729 return AVERROR_INVALIDDATA;
1730 } else if (size <= 3)
1733 if (st->discard >= AVDISCARD_ALL)
1735 if (duration == AV_NOPTS_VALUE)
1736 duration = track->default_duration / matroska->time_scale;
1738 block_time = AV_RB16(data);
1742 if (is_keyframe == -1)
1743 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
1745 if (cluster_time != (uint64_t)-1
1746 && (block_time >= 0 || cluster_time >= -block_time)) {
1747 timecode = cluster_time + block_time;
1748 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
1749 && timecode < track->end_timecode)
1750 is_keyframe = 0; /* overlapping subtitles are not key frame */
1752 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
1753 track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
1756 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1757 if (!is_keyframe || timecode < matroska->skip_to_timecode)
1759 matroska->skip_to_keyframe = 0;
1762 switch ((flags & 0x06) >> 1) {
1763 case 0x0: /* no lacing */
1765 lace_size = av_mallocz(sizeof(int));
1766 lace_size[0] = size;
1769 case 0x1: /* Xiph lacing */
1770 case 0x2: /* fixed-size lacing */
1771 case 0x3: /* EBML lacing */
1772 assert(size>0); // size <=3 is checked before size-=3 above
1773 laces = (*data) + 1;
1776 lace_size = av_mallocz(laces * sizeof(int));
1778 switch ((flags & 0x06) >> 1) {
1779 case 0x1: /* Xiph lacing */ {
1782 for (n = 0; res == 0 && n < laces - 1; n++) {
1789 lace_size[n] += temp;
1795 total += lace_size[n];
1797 lace_size[n] = size - total;
1801 case 0x2: /* fixed-size lacing */
1802 for (n = 0; n < laces; n++)
1803 lace_size[n] = size / laces;
1806 case 0x3: /* EBML lacing */ {
1808 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1810 av_log(matroska->ctx, AV_LOG_INFO,
1811 "EBML block data error\n");
1816 total = lace_size[0] = num;
1817 for (n = 1; res == 0 && n < laces - 1; n++) {
1820 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1822 av_log(matroska->ctx, AV_LOG_INFO,
1823 "EBML block data error\n");
1828 lace_size[n] = lace_size[n - 1] + snum;
1829 total += lace_size[n];
1831 lace_size[laces - 1] = size - total;
1839 for (n = 0; n < laces; n++) {
1840 if ((st->codec->codec_id == CODEC_ID_RA_288 ||
1841 st->codec->codec_id == CODEC_ID_COOK ||
1842 st->codec->codec_id == CODEC_ID_SIPR ||
1843 st->codec->codec_id == CODEC_ID_ATRAC3) &&
1844 st->codec->block_align && track->audio.sub_packet_size) {
1845 int a = st->codec->block_align;
1846 int sps = track->audio.sub_packet_size;
1847 int cfs = track->audio.coded_framesize;
1848 int h = track->audio.sub_packet_h;
1849 int y = track->audio.sub_packet_cnt;
1850 int w = track->audio.frame_size;
1853 if (!track->audio.pkt_cnt) {
1854 if (track->audio.sub_packet_cnt == 0)
1855 track->audio.buf_timecode = timecode;
1856 if (st->codec->codec_id == CODEC_ID_RA_288) {
1857 if (size < cfs * h / 2) {
1858 av_log(matroska->ctx, AV_LOG_ERROR,
1859 "Corrupt int4 RM-style audio packet size\n");
1860 res = AVERROR_INVALIDDATA;
1863 for (x=0; x<h/2; x++)
1864 memcpy(track->audio.buf+x*2*w+y*cfs,
1866 } else if (st->codec->codec_id == CODEC_ID_SIPR) {
1868 av_log(matroska->ctx, AV_LOG_ERROR,
1869 "Corrupt sipr RM-style audio packet size\n");
1870 res = AVERROR_INVALIDDATA;
1873 memcpy(track->audio.buf + y*w, data, w);
1875 if (size < sps * w / sps) {
1876 av_log(matroska->ctx, AV_LOG_ERROR,
1877 "Corrupt generic RM-style audio packet size\n");
1878 res = AVERROR_INVALIDDATA;
1881 for (x=0; x<w/sps; x++)
1882 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1885 if (++track->audio.sub_packet_cnt >= h) {
1886 if (st->codec->codec_id == CODEC_ID_SIPR)
1887 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
1888 track->audio.sub_packet_cnt = 0;
1889 track->audio.pkt_cnt = h*w / a;
1892 while (track->audio.pkt_cnt) {
1893 pkt = av_mallocz(sizeof(AVPacket));
1894 av_new_packet(pkt, a);
1895 memcpy(pkt->data, track->audio.buf
1896 + a * (h*w / a - track->audio.pkt_cnt--), a);
1897 pkt->pts = track->audio.buf_timecode;
1898 track->audio.buf_timecode = AV_NOPTS_VALUE;
1900 pkt->stream_index = st->index;
1901 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1904 MatroskaTrackEncoding *encodings = track->encodings.elem;
1905 int offset = 0, pkt_size = lace_size[n];
1906 uint8_t *pkt_data = data;
1908 if (pkt_size > size) {
1909 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
1913 if (encodings && encodings->scope & 1) {
1914 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1919 pkt = av_mallocz(sizeof(AVPacket));
1920 /* XXX: prevent data copy... */
1921 if (av_new_packet(pkt, pkt_size+offset) < 0) {
1923 res = AVERROR(ENOMEM);
1927 memcpy (pkt->data, encodings->compression.settings.data, offset);
1928 memcpy (pkt->data+offset, pkt_data, pkt_size);
1930 if (pkt_data != data)
1934 pkt->flags = is_keyframe;
1935 pkt->stream_index = st->index;
1937 if (track->ms_compat)
1938 pkt->dts = timecode;
1940 pkt->pts = timecode;
1942 if (st->codec->codec_id == CODEC_ID_TEXT)
1943 pkt->convergence_duration = duration;
1944 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
1945 pkt->duration = duration;
1947 if (st->codec->codec_id == CODEC_ID_SSA)
1948 matroska_fix_ass_packet(matroska, pkt, duration);
1950 if (matroska->prev_pkt &&
1951 timecode != AV_NOPTS_VALUE &&
1952 matroska->prev_pkt->pts == timecode &&
1953 matroska->prev_pkt->stream_index == st->index &&
1954 st->codec->codec_id == CODEC_ID_SSA)
1955 matroska_merge_packets(matroska->prev_pkt, pkt);
1957 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1958 matroska->prev_pkt = pkt;
1962 if (timecode != AV_NOPTS_VALUE)
1963 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
1964 data += lace_size[n];
1965 size -= lace_size[n];
1974 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
1976 EbmlList *blocks_list;
1977 MatroskaBlock *blocks;
1979 res = ebml_parse(matroska,
1980 matroska_cluster_incremental_parsing,
1981 &matroska->current_cluster);
1984 if (matroska->current_cluster_pos)
1985 ebml_level_end(matroska);
1986 ebml_free(matroska_cluster, &matroska->current_cluster);
1987 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
1988 matroska->current_cluster_num_blocks = 0;
1989 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
1990 matroska->prev_pkt = NULL;
1991 /* sizeof the ID which was already read */
1992 if (matroska->current_id)
1993 matroska->current_cluster_pos -= 4;
1994 res = ebml_parse(matroska,
1995 matroska_clusters_incremental,
1996 &matroska->current_cluster);
1997 /* Try parsing the block again. */
1999 res = ebml_parse(matroska,
2000 matroska_cluster_incremental_parsing,
2001 &matroska->current_cluster);
2005 matroska->current_cluster_num_blocks <
2006 matroska->current_cluster.blocks.nb_elem) {
2007 blocks_list = &matroska->current_cluster.blocks;
2008 blocks = blocks_list->elem;
2010 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2011 i = blocks_list->nb_elem - 1;
2012 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2013 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2014 if (!blocks[i].non_simple)
2015 blocks[i].duration = AV_NOPTS_VALUE;
2016 res = matroska_parse_block(matroska,
2017 blocks[i].bin.data, blocks[i].bin.size,
2019 matroska->current_cluster.timecode,
2020 blocks[i].duration, is_keyframe,
2021 matroska->current_cluster_pos);
2025 if (res < 0) matroska->done = 1;
2029 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2031 MatroskaCluster cluster = { 0 };
2032 EbmlList *blocks_list;
2033 MatroskaBlock *blocks;
2036 if (!matroska->contains_ssa)
2037 return matroska_parse_cluster_incremental(matroska);
2038 pos = avio_tell(matroska->ctx->pb);
2039 matroska->prev_pkt = NULL;
2040 if (matroska->current_id)
2041 pos -= 4; /* sizeof the ID which was already read */
2042 res = ebml_parse(matroska, matroska_clusters, &cluster);
2043 blocks_list = &cluster.blocks;
2044 blocks = blocks_list->elem;
2045 for (i=0; i<blocks_list->nb_elem && !res; i++)
2046 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2047 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2048 if (!blocks[i].non_simple)
2049 blocks[i].duration = AV_NOPTS_VALUE;
2050 res=matroska_parse_block(matroska,
2051 blocks[i].bin.data, blocks[i].bin.size,
2052 blocks[i].bin.pos, cluster.timecode,
2053 blocks[i].duration, is_keyframe,
2056 ebml_free(matroska_cluster, &cluster);
2057 if (res < 0) matroska->done = 1;
2061 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2063 MatroskaDemuxContext *matroska = s->priv_data;
2066 while (!ret && matroska_deliver_packet(matroska, pkt)) {
2069 ret = matroska_parse_cluster(matroska);
2072 if (ret == AVERROR_INVALIDDATA) {
2073 pkt->flags |= AV_PKT_FLAG_CORRUPT;
2080 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2081 int64_t timestamp, int flags)
2083 MatroskaDemuxContext *matroska = s->priv_data;
2084 MatroskaTrack *tracks = matroska->tracks.elem;
2085 AVStream *st = s->streams[stream_index];
2086 int i, index, index_sub, index_min;
2088 /* Parse the CUES now since we need the index data to seek. */
2089 if (matroska->cues_parsing_deferred) {
2090 matroska_parse_cues(matroska);
2091 matroska->cues_parsing_deferred = 0;
2094 if (!st->nb_index_entries)
2096 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2098 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2099 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
2100 matroska->current_id = 0;
2101 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2102 matroska->prev_pkt = NULL;
2103 matroska_clear_queue(matroska);
2104 if (matroska_parse_cluster(matroska) < 0)
2109 matroska_clear_queue(matroska);
2114 for (i=0; i < matroska->tracks.nb_elem; i++) {
2115 tracks[i].audio.pkt_cnt = 0;
2116 tracks[i].audio.sub_packet_cnt = 0;
2117 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2118 tracks[i].end_timecode = 0;
2119 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
2120 && !tracks[i].stream->discard != AVDISCARD_ALL) {
2121 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
2123 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
2124 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
2125 index_min = index_sub;
2129 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2130 matroska->current_id = 0;
2131 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2132 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2134 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2138 static int matroska_read_close(AVFormatContext *s)
2140 MatroskaDemuxContext *matroska = s->priv_data;
2141 MatroskaTrack *tracks = matroska->tracks.elem;
2144 matroska_clear_queue(matroska);
2146 for (n=0; n < matroska->tracks.nb_elem; n++)
2147 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2148 av_free(tracks[n].audio.buf);
2149 ebml_free(matroska_cluster, &matroska->current_cluster);
2150 ebml_free(matroska_segment, matroska);
2155 AVInputFormat ff_matroska_demuxer = {
2156 .name = "matroska,webm",
2157 .long_name = NULL_IF_CONFIG_SMALL("Matroska/WebM file format"),
2158 .priv_data_size = sizeof(MatroskaDemuxContext),
2159 .read_probe = matroska_probe,
2160 .read_header = matroska_read_header,
2161 .read_packet = matroska_read_packet,
2162 .read_close = matroska_read_close,
2163 .read_seek = matroska_read_seek,