2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The FFmpeg Project
5 * This file is part of FFmpeg.
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 uint64_t stereo_mode;
117 } MatroskaTrackVideo;
121 double out_samplerate;
125 /* real audio header (extracted from extradata) */
132 uint64_t buf_timecode;
134 } MatroskaTrackAudio;
139 } MatroskaTrackPlane;
142 EbmlList combine_planes;
143 } MatroskaTrackOperation;
154 uint64_t default_duration;
155 uint64_t flag_default;
156 uint64_t flag_forced;
157 MatroskaTrackVideo video;
158 MatroskaTrackAudio audio;
159 MatroskaTrackOperation operation;
163 int64_t end_timecode;
174 } MatroskaAttachement;
212 MatroskaTagTarget target;
227 AVFormatContext *ctx;
231 MatroskaLevel levels[EBML_MAX_DEPTH];
239 EbmlList attachments;
245 /* byte position of the segment inside the stream */
246 int64_t segment_start;
248 /* the packet queue */
255 /* What to skip before effectively reading a packet. */
256 int skip_to_keyframe;
257 uint64_t skip_to_timecode;
259 /* File has a CUES element, but we defer parsing until it is needed. */
260 int cues_parsing_deferred;
261 } MatroskaDemuxContext;
275 static EbmlSyntax ebml_header[] = {
276 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
277 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
278 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
279 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
280 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
281 { EBML_ID_EBMLVERSION, EBML_NONE },
282 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
286 static EbmlSyntax ebml_syntax[] = {
287 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
291 static EbmlSyntax matroska_info[] = {
292 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
293 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
294 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
295 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
296 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
297 { MATROSKA_ID_DATEUTC, EBML_NONE },
298 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
302 static EbmlSyntax matroska_track_video[] = {
303 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
304 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
305 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
306 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
307 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
308 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo,color_space) },
309 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,stereo_mode) },
310 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
311 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
312 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
313 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
314 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
315 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
316 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
320 static EbmlSyntax matroska_track_audio[] = {
321 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
322 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
323 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
324 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
328 static EbmlSyntax matroska_track_encoding_compression[] = {
329 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
330 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
334 static EbmlSyntax matroska_track_encoding[] = {
335 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
336 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
337 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
338 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
342 static EbmlSyntax matroska_track_encodings[] = {
343 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
347 static EbmlSyntax matroska_track_plane[] = {
348 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
349 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
353 static EbmlSyntax matroska_track_combine_planes[] = {
354 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n=matroska_track_plane} },
358 static EbmlSyntax matroska_track_operation[] = {
359 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n=matroska_track_combine_planes} },
363 static EbmlSyntax matroska_track[] = {
364 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
365 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
366 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
367 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
368 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
369 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
370 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
371 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
372 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
373 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
374 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
375 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
376 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
377 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack,operation), {.n=matroska_track_operation} },
378 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
379 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
380 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
381 { MATROSKA_ID_CODECNAME, EBML_NONE },
382 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
383 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
384 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
385 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
386 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
387 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
391 static EbmlSyntax matroska_tracks[] = {
392 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
396 static EbmlSyntax matroska_attachment[] = {
397 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
398 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
399 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
400 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
401 { MATROSKA_ID_FILEDESC, EBML_NONE },
405 static EbmlSyntax matroska_attachments[] = {
406 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
410 static EbmlSyntax matroska_chapter_display[] = {
411 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
412 { MATROSKA_ID_CHAPLANG, EBML_NONE },
416 static EbmlSyntax matroska_chapter_entry[] = {
417 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
418 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
419 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
420 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
421 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
422 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
423 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
424 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
428 static EbmlSyntax matroska_chapter[] = {
429 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
430 { MATROSKA_ID_EDITIONUID, EBML_NONE },
431 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
432 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
433 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
437 static EbmlSyntax matroska_chapters[] = {
438 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
442 static EbmlSyntax matroska_index_pos[] = {
443 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
444 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
445 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
449 static EbmlSyntax matroska_index_entry[] = {
450 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
451 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
455 static EbmlSyntax matroska_index[] = {
456 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
460 static EbmlSyntax matroska_simpletag[] = {
461 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
462 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
463 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
464 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
465 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
466 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
470 static EbmlSyntax matroska_tagtargets[] = {
471 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
472 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
473 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
474 { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
475 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
479 static EbmlSyntax matroska_tag[] = {
480 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
481 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
485 static EbmlSyntax matroska_tags[] = {
486 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
490 static EbmlSyntax matroska_seekhead_entry[] = {
491 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
492 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
496 static EbmlSyntax matroska_seekhead[] = {
497 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
501 static EbmlSyntax matroska_segment[] = {
502 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
503 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
504 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
505 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
506 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
507 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
508 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
509 { MATROSKA_ID_CLUSTER, EBML_STOP },
513 static EbmlSyntax matroska_segments[] = {
514 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
518 static EbmlSyntax matroska_blockgroup[] = {
519 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
520 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
521 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration) },
522 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
523 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
527 static EbmlSyntax matroska_cluster[] = {
528 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
529 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
530 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
531 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
532 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
536 static EbmlSyntax matroska_clusters[] = {
537 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
538 { MATROSKA_ID_INFO, EBML_NONE },
539 { MATROSKA_ID_CUES, EBML_NONE },
540 { MATROSKA_ID_TAGS, EBML_NONE },
541 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
545 static const char *const matroska_doctypes[] = { "matroska", "webm" };
547 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
549 AVIOContext *pb = matroska->ctx->pb;
551 matroska->current_id = 0;
552 matroska->num_levels = 0;
554 // seek to next position to resync from
555 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0 || avio_tell(pb) <= last_pos)
560 // try to find a toplevel element
561 while (!url_feof(pb)) {
562 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
563 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
564 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
565 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS)
567 matroska->current_id = id;
570 id = (id << 8) | avio_r8(pb);
578 * Return: Whether we reached the end of a level in the hierarchy or not.
580 static int ebml_level_end(MatroskaDemuxContext *matroska)
582 AVIOContext *pb = matroska->ctx->pb;
583 int64_t pos = avio_tell(pb);
585 if (matroska->num_levels > 0) {
586 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
587 if (pos - level->start >= level->length || matroska->current_id) {
588 matroska->num_levels--;
596 * Read: an "EBML number", which is defined as a variable-length
597 * array of bytes. The first byte indicates the length by giving a
598 * number of 0-bits followed by a one. The position of the first
599 * "one" bit inside the first byte indicates the length of this
601 * Returns: number of bytes read, < 0 on error
603 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
604 int max_size, uint64_t *number)
609 /* The first byte tells us the length in bytes - avio_r8() can normally
610 * return 0, but since that's not a valid first ebmlID byte, we can
611 * use it safely here to catch EOS. */
612 if (!(total = avio_r8(pb))) {
613 /* we might encounter EOS here */
615 int64_t pos = avio_tell(pb);
616 av_log(matroska->ctx, AV_LOG_ERROR,
617 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
620 return AVERROR(EIO); /* EOS or actual I/O error */
623 /* get the length of the EBML number */
624 read = 8 - ff_log2_tab[total];
625 if (read > max_size) {
626 int64_t pos = avio_tell(pb) - 1;
627 av_log(matroska->ctx, AV_LOG_ERROR,
628 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
629 (uint8_t) total, pos, pos);
630 return AVERROR_INVALIDDATA;
633 /* read out length */
634 total ^= 1 << ff_log2_tab[total];
636 total = (total << 8) | avio_r8(pb);
644 * Read a EBML length value.
645 * This needs special handling for the "unknown length" case which has multiple
648 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
651 int res = ebml_read_num(matroska, pb, 8, number);
652 if (res > 0 && *number + 1 == 1ULL << (7 * res))
653 *number = 0xffffffffffffffULL;
658 * Read the next element as an unsigned int.
659 * 0 is success, < 0 is failure.
661 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
666 return AVERROR_INVALIDDATA;
668 /* big-endian ordering; build up number */
671 *num = (*num << 8) | avio_r8(pb);
677 * Read the next element as a float.
678 * 0 is success, < 0 is failure.
680 static int ebml_read_float(AVIOContext *pb, int size, double *num)
684 } else if (size == 4) {
685 *num = av_int2float(avio_rb32(pb));
686 } else if (size == 8){
687 *num = av_int2double(avio_rb64(pb));
689 return AVERROR_INVALIDDATA;
695 * Read the next element as an ASCII string.
696 * 0 is success, < 0 is failure.
698 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
702 /* EBML strings are usually not 0-terminated, so we allocate one
703 * byte more, read the string and NULL-terminate it ourselves. */
704 if (!(res = av_malloc(size + 1)))
705 return AVERROR(ENOMEM);
706 if (avio_read(pb, (uint8_t *) res, size) != size) {
718 * Read the next element as binary data.
719 * 0 is success, < 0 is failure.
721 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
724 if (!(bin->data = av_malloc(length)))
725 return AVERROR(ENOMEM);
728 bin->pos = avio_tell(pb);
729 if (avio_read(pb, bin->data, length) != length) {
730 av_freep(&bin->data);
738 * Read the next element, but only the header. The contents
739 * are supposed to be sub-elements which can be read separately.
740 * 0 is success, < 0 is failure.
742 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
744 AVIOContext *pb = matroska->ctx->pb;
745 MatroskaLevel *level;
747 if (matroska->num_levels >= EBML_MAX_DEPTH) {
748 av_log(matroska->ctx, AV_LOG_ERROR,
749 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
750 return AVERROR(ENOSYS);
753 level = &matroska->levels[matroska->num_levels++];
754 level->start = avio_tell(pb);
755 level->length = length;
761 * Read signed/unsigned "EBML" numbers.
762 * Return: number of bytes processed, < 0 on error
764 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
765 uint8_t *data, uint32_t size, uint64_t *num)
768 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
769 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
773 * Same as above, but signed.
775 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
776 uint8_t *data, uint32_t size, int64_t *num)
781 /* read as unsigned number first */
782 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
785 /* make signed (weird way) */
786 *num = unum - ((1LL << (7*res - 1)) - 1);
791 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
792 EbmlSyntax *syntax, void *data);
794 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
795 uint32_t id, void *data)
798 for (i=0; syntax[i].id; i++)
799 if (id == syntax[i].id)
801 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
802 matroska->num_levels > 0 &&
803 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
804 return 0; // we reached the end of an unknown size cluster
805 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32)
806 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
807 return ebml_parse_elem(matroska, &syntax[i], data);
810 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
813 if (!matroska->current_id) {
815 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
818 matroska->current_id = id | 1 << 7*res;
820 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
823 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
828 for (i=0; syntax[i].id; i++)
829 switch (syntax[i].type) {
831 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
834 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
838 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
842 while (!res && !ebml_level_end(matroska))
843 res = ebml_parse(matroska, syntax, data);
848 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
849 EbmlSyntax *syntax, void *data)
851 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
854 // max. 16 MB for strings
855 [EBML_STR] = 0x1000000,
856 [EBML_UTF8] = 0x1000000,
857 // max. 256 MB for binary data
858 [EBML_BIN] = 0x10000000,
859 // no limits for anything else
861 AVIOContext *pb = matroska->ctx->pb;
862 uint32_t id = syntax->id;
867 data = (char *)data + syntax->data_offset;
868 if (syntax->list_elem_size) {
869 EbmlList *list = data;
870 newelem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
872 return AVERROR(ENOMEM);
873 list->elem = newelem;
874 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
875 memset(data, 0, syntax->list_elem_size);
879 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
880 matroska->current_id = 0;
881 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
883 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
884 av_log(matroska->ctx, AV_LOG_ERROR,
885 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
886 length, max_lengths[syntax->type], syntax->type);
887 return AVERROR_INVALIDDATA;
891 switch (syntax->type) {
892 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
893 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
895 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
896 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
897 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
899 if (id == MATROSKA_ID_SEGMENT)
900 matroska->segment_start = avio_tell(matroska->ctx->pb);
901 return ebml_parse_nest(matroska, syntax->def.n, data);
902 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
903 case EBML_STOP: return 1;
904 default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
906 if (res == AVERROR_INVALIDDATA)
907 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
908 else if (res == AVERROR(EIO))
909 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
913 static void ebml_free(EbmlSyntax *syntax, void *data)
916 for (i=0; syntax[i].id; i++) {
917 void *data_off = (char *)data + syntax[i].data_offset;
918 switch (syntax[i].type) {
920 case EBML_UTF8: av_freep(data_off); break;
921 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
923 if (syntax[i].list_elem_size) {
924 EbmlList *list = data_off;
925 char *ptr = list->elem;
926 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
927 ebml_free(syntax[i].def.n, ptr);
930 ebml_free(syntax[i].def.n, data_off);
940 static int matroska_probe(AVProbeData *p)
943 int len_mask = 0x80, size = 1, n = 1, i;
946 if (AV_RB32(p->buf) != EBML_ID_HEADER)
949 /* length of header */
951 while (size <= 8 && !(total & len_mask)) {
957 total &= (len_mask - 1);
959 total = (total << 8) | p->buf[4 + n++];
961 /* Does the probe data contain the whole header? */
962 if (p->buf_size < 4 + size + total)
965 /* The header should contain a known document type. For now,
966 * we don't parse the whole header but simply check for the
967 * availability of that array of characters inside the header.
968 * Not fully fool-proof, but good enough. */
969 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
970 int probelen = strlen(matroska_doctypes[i]);
971 if (total < probelen)
973 for (n = 4+size; n <= 4+size+total-probelen; n++)
974 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
975 return AVPROBE_SCORE_MAX;
978 // probably valid EBML header but no recognized doctype
979 return AVPROBE_SCORE_MAX/2;
982 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
985 MatroskaTrack *tracks = matroska->tracks.elem;
988 for (i=0; i < matroska->tracks.nb_elem; i++)
989 if (tracks[i].num == num)
992 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
996 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
997 MatroskaTrack *track)
999 MatroskaTrackEncoding *encodings = track->encodings.elem;
1000 uint8_t* data = *buf;
1001 int isize = *buf_size;
1002 uint8_t* pkt_data = NULL;
1003 uint8_t av_unused *newpktdata;
1004 int pkt_size = isize;
1008 if (pkt_size >= 10000000)
1011 switch (encodings[0].compression.algo) {
1012 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1013 return encodings[0].compression.settings.size;
1014 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1016 olen = pkt_size *= 3;
1017 pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
1018 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1019 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
1025 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
1026 z_stream zstream = {0};
1027 if (inflateInit(&zstream) != Z_OK)
1029 zstream.next_in = data;
1030 zstream.avail_in = isize;
1033 newpktdata = av_realloc(pkt_data, pkt_size);
1035 inflateEnd(&zstream);
1038 pkt_data = newpktdata;
1039 zstream.avail_out = pkt_size - zstream.total_out;
1040 zstream.next_out = pkt_data + zstream.total_out;
1042 result = inflate(&zstream, Z_NO_FLUSH);
1044 result = Z_MEM_ERROR;
1045 } while (result==Z_OK && pkt_size<10000000);
1046 pkt_size = zstream.total_out;
1047 inflateEnd(&zstream);
1048 if (result != Z_STREAM_END)
1054 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
1055 bz_stream bzstream = {0};
1056 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1058 bzstream.next_in = data;
1059 bzstream.avail_in = isize;
1062 newpktdata = av_realloc(pkt_data, pkt_size);
1064 BZ2_bzDecompressEnd(&bzstream);
1067 pkt_data = newpktdata;
1068 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1069 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1071 result = BZ2_bzDecompress(&bzstream);
1073 result = BZ_MEM_ERROR;
1074 } while (result==BZ_OK && pkt_size<10000000);
1075 pkt_size = bzstream.total_out_lo32;
1076 BZ2_bzDecompressEnd(&bzstream);
1077 if (result != BZ_STREAM_END)
1087 *buf_size = pkt_size;
1094 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1095 AVPacket *pkt, uint64_t display_duration)
1097 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
1098 for (; *ptr!=',' && ptr<end-1; ptr++);
1102 for (; *ptr!=',' && ptr<end-1; ptr++);
1104 int64_t end_pts = pkt->pts + display_duration;
1105 int sc = matroska->time_scale * pkt->pts / 10000000;
1106 int ec = matroska->time_scale * end_pts / 10000000;
1107 int sh, sm, ss, eh, em, es, len;
1108 sh = sc/360000; sc -= 360000*sh;
1109 sm = sc/ 6000; sc -= 6000*sm;
1110 ss = sc/ 100; sc -= 100*ss;
1111 eh = ec/360000; ec -= 360000*eh;
1112 em = ec/ 6000; ec -= 6000*em;
1113 es = ec/ 100; ec -= 100*es;
1115 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1116 if (!(line = av_malloc(len)))
1118 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1119 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1122 pkt->size = strlen(line);
1126 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1128 void *newdata = av_realloc(out->data, out->size+in->size);
1130 return AVERROR(ENOMEM);
1131 out->data = newdata;
1132 memcpy(out->data+out->size, in->data, in->size);
1133 out->size += in->size;
1134 av_destruct_packet(in);
1139 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1140 AVDictionary **metadata, char *prefix)
1142 MatroskaTag *tags = list->elem;
1146 for (i=0; i < list->nb_elem; i++) {
1147 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1149 if (!tags[i].name) {
1150 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1153 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1154 else av_strlcpy(key, tags[i].name, sizeof(key));
1155 if (tags[i].def || !lang) {
1156 av_dict_set(metadata, key, tags[i].string, 0);
1157 if (tags[i].sub.nb_elem)
1158 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1161 av_strlcat(key, "-", sizeof(key));
1162 av_strlcat(key, lang, sizeof(key));
1163 av_dict_set(metadata, key, tags[i].string, 0);
1164 if (tags[i].sub.nb_elem)
1165 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1168 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1171 static void matroska_convert_tags(AVFormatContext *s)
1173 MatroskaDemuxContext *matroska = s->priv_data;
1174 MatroskaTags *tags = matroska->tags.elem;
1177 for (i=0; i < matroska->tags.nb_elem; i++) {
1178 if (tags[i].target.attachuid) {
1179 MatroskaAttachement *attachment = matroska->attachments.elem;
1180 for (j=0; j<matroska->attachments.nb_elem; j++)
1181 if (attachment[j].uid == tags[i].target.attachuid
1182 && attachment[j].stream)
1183 matroska_convert_tag(s, &tags[i].tag,
1184 &attachment[j].stream->metadata, NULL);
1185 } else if (tags[i].target.chapteruid) {
1186 MatroskaChapter *chapter = matroska->chapters.elem;
1187 for (j=0; j<matroska->chapters.nb_elem; j++)
1188 if (chapter[j].uid == tags[i].target.chapteruid
1189 && chapter[j].chapter)
1190 matroska_convert_tag(s, &tags[i].tag,
1191 &chapter[j].chapter->metadata, NULL);
1192 } else if (tags[i].target.trackuid) {
1193 MatroskaTrack *track = matroska->tracks.elem;
1194 for (j=0; j<matroska->tracks.nb_elem; j++)
1195 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1196 matroska_convert_tag(s, &tags[i].tag,
1197 &track[j].stream->metadata, NULL);
1199 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1200 tags[i].target.type);
1205 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
1207 EbmlList *seekhead_list = &matroska->seekhead;
1208 MatroskaSeekhead *seekhead = seekhead_list->elem;
1209 uint32_t level_up = matroska->level_up;
1210 int64_t before_pos = avio_tell(matroska->ctx->pb);
1211 uint32_t saved_id = matroska->current_id;
1212 MatroskaLevel level;
1216 if (idx >= seekhead_list->nb_elem
1217 || seekhead[idx].id == MATROSKA_ID_SEEKHEAD
1218 || seekhead[idx].id == MATROSKA_ID_CLUSTER)
1222 offset = seekhead[idx].pos + matroska->segment_start;
1223 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1224 /* We don't want to lose our seekhead level, so we add
1225 * a dummy. This is a crude hack. */
1226 if (matroska->num_levels == EBML_MAX_DEPTH) {
1227 av_log(matroska->ctx, AV_LOG_INFO,
1228 "Max EBML element depth (%d) reached, "
1229 "cannot parse further.\n", EBML_MAX_DEPTH);
1230 ret = AVERROR_INVALIDDATA;
1233 level.length = (uint64_t)-1;
1234 matroska->levels[matroska->num_levels] = level;
1235 matroska->num_levels++;
1236 matroska->current_id = 0;
1238 ret = ebml_parse(matroska, matroska_segment, matroska);
1240 /* remove dummy level */
1241 while (matroska->num_levels) {
1242 uint64_t length = matroska->levels[--matroska->num_levels].length;
1243 if (length == (uint64_t)-1)
1249 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1250 matroska->level_up = level_up;
1251 matroska->current_id = saved_id;
1256 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1258 EbmlList *seekhead_list = &matroska->seekhead;
1259 int64_t before_pos = avio_tell(matroska->ctx->pb);
1262 // we should not do any seeking in the streaming case
1263 if (!matroska->ctx->pb->seekable ||
1264 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1267 for (i = 0; i < seekhead_list->nb_elem; i++) {
1268 MatroskaSeekhead *seekhead = seekhead_list->elem;
1269 if (seekhead[i].pos <= before_pos)
1272 // defer cues parsing until we actually need cue data.
1273 if (seekhead[i].id == MATROSKA_ID_CUES) {
1274 matroska->cues_parsing_deferred = 1;
1278 if (matroska_parse_seekhead_entry(matroska, i) < 0) {
1279 // mark index as broken
1280 matroska->cues_parsing_deferred = -1;
1286 static void matroska_add_index_entries(MatroskaDemuxContext *matroska) {
1287 EbmlList *index_list;
1288 MatroskaIndex *index;
1289 int index_scale = 1;
1292 index_list = &matroska->index;
1293 index = index_list->elem;
1294 if (index_list->nb_elem
1295 && index[0].time > 1E14/matroska->time_scale) {
1296 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1297 index_scale = matroska->time_scale;
1299 for (i = 0; i < index_list->nb_elem; i++) {
1300 EbmlList *pos_list = &index[i].pos;
1301 MatroskaIndexPos *pos = pos_list->elem;
1302 for (j = 0; j < pos_list->nb_elem; j++) {
1303 MatroskaTrack *track = matroska_find_track_by_num(matroska, pos[j].track);
1304 if (track && track->stream)
1305 av_add_index_entry(track->stream,
1306 pos[j].pos + matroska->segment_start,
1307 index[i].time/index_scale, 0, 0,
1313 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1314 EbmlList *seekhead_list = &matroska->seekhead;
1315 MatroskaSeekhead *seekhead = seekhead_list->elem;
1318 for (i = 0; i < seekhead_list->nb_elem; i++)
1319 if (seekhead[i].id == MATROSKA_ID_CUES)
1321 assert(i <= seekhead_list->nb_elem);
1323 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1324 matroska->cues_parsing_deferred = -1;
1325 matroska_add_index_entries(matroska);
1328 static int matroska_aac_profile(char *codec_id)
1330 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1333 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1334 if (strstr(codec_id, aac_profiles[profile]))
1339 static int matroska_aac_sri(int samplerate)
1343 for (sri=0; sri<FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1344 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1349 static int matroska_read_header(AVFormatContext *s)
1351 MatroskaDemuxContext *matroska = s->priv_data;
1352 EbmlList *attachements_list = &matroska->attachments;
1353 MatroskaAttachement *attachements;
1354 EbmlList *chapters_list = &matroska->chapters;
1355 MatroskaChapter *chapters;
1356 MatroskaTrack *tracks;
1357 uint64_t max_start = 0;
1365 /* First read the EBML header. */
1366 if (ebml_parse(matroska, ebml_syntax, &ebml)
1367 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1368 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 3) {
1369 av_log(matroska->ctx, AV_LOG_ERROR,
1370 "EBML header using unsupported features\n"
1371 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1372 ebml.version, ebml.doctype, ebml.doctype_version);
1373 ebml_free(ebml_syntax, &ebml);
1374 return AVERROR_PATCHWELCOME;
1375 } else if (ebml.doctype_version == 3) {
1376 av_log(matroska->ctx, AV_LOG_WARNING,
1377 "EBML header using unsupported features\n"
1378 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1379 ebml.version, ebml.doctype, ebml.doctype_version);
1381 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1382 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1384 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1385 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1387 ebml_free(ebml_syntax, &ebml);
1389 /* The next thing is a segment. */
1390 pos = avio_tell(matroska->ctx->pb);
1391 res = ebml_parse(matroska, matroska_segments, matroska);
1392 // try resyncing until we find a EBML_STOP type element.
1394 res = matroska_resync(matroska, pos);
1397 pos = avio_tell(matroska->ctx->pb);
1398 res = ebml_parse(matroska, matroska_segment, matroska);
1400 matroska_execute_seekhead(matroska);
1402 if (!matroska->time_scale)
1403 matroska->time_scale = 1000000;
1404 if (matroska->duration)
1405 matroska->ctx->duration = matroska->duration * matroska->time_scale
1406 * 1000 / AV_TIME_BASE;
1407 av_dict_set(&s->metadata, "title", matroska->title, 0);
1409 tracks = matroska->tracks.elem;
1410 for (i=0; i < matroska->tracks.nb_elem; i++) {
1411 MatroskaTrack *track = &tracks[i];
1412 enum CodecID codec_id = CODEC_ID_NONE;
1413 EbmlList *encodings_list = &track->encodings;
1414 MatroskaTrackEncoding *encodings = encodings_list->elem;
1415 uint8_t *extradata = NULL;
1416 int extradata_size = 0;
1417 int extradata_offset = 0;
1418 uint32_t fourcc = 0;
1421 /* Apply some sanity checks. */
1422 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1423 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1424 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1425 av_log(matroska->ctx, AV_LOG_INFO,
1426 "Unknown or unsupported track type %"PRIu64"\n",
1430 if (track->codec_id == NULL)
1433 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1434 if (!track->default_duration)
1435 track->default_duration = 1000000000/track->video.frame_rate;
1436 if (!track->video.display_width)
1437 track->video.display_width = track->video.pixel_width;
1438 if (!track->video.display_height)
1439 track->video.display_height = track->video.pixel_height;
1440 if (track->video.color_space.size == 4)
1441 fourcc = AV_RL32(track->video.color_space.data);
1442 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1443 if (!track->audio.out_samplerate)
1444 track->audio.out_samplerate = track->audio.samplerate;
1446 if (encodings_list->nb_elem > 1) {
1447 av_log(matroska->ctx, AV_LOG_ERROR,
1448 "Multiple combined encodings not supported");
1449 } else if (encodings_list->nb_elem == 1) {
1450 if (encodings[0].type ||
1451 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1453 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1456 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1458 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1459 encodings[0].scope = 0;
1460 av_log(matroska->ctx, AV_LOG_ERROR,
1461 "Unsupported encoding type");
1462 } else if (track->codec_priv.size && encodings[0].scope&2) {
1463 uint8_t *codec_priv = track->codec_priv.data;
1464 int offset = matroska_decode_buffer(&track->codec_priv.data,
1465 &track->codec_priv.size,
1468 track->codec_priv.data = NULL;
1469 track->codec_priv.size = 0;
1470 av_log(matroska->ctx, AV_LOG_ERROR,
1471 "Failed to decode codec private data\n");
1472 } else if (offset > 0) {
1473 track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1474 memcpy(track->codec_priv.data,
1475 encodings[0].compression.settings.data, offset);
1476 memcpy(track->codec_priv.data+offset, codec_priv,
1477 track->codec_priv.size);
1478 track->codec_priv.size += offset;
1480 if (codec_priv != track->codec_priv.data)
1481 av_free(codec_priv);
1485 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1486 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1487 strlen(ff_mkv_codec_tags[j].str))){
1488 codec_id= ff_mkv_codec_tags[j].id;
1493 st = track->stream = avformat_new_stream(s, NULL);
1495 return AVERROR(ENOMEM);
1497 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1498 && track->codec_priv.size >= 40
1499 && track->codec_priv.data != NULL) {
1500 track->ms_compat = 1;
1501 fourcc = AV_RL32(track->codec_priv.data + 16);
1502 codec_id = ff_codec_get_id(ff_codec_bmp_tags, fourcc);
1503 extradata_offset = 40;
1504 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1505 && track->codec_priv.size >= 14
1506 && track->codec_priv.data != NULL) {
1508 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1509 AVIO_FLAG_READ, NULL, NULL, NULL, NULL);
1510 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1513 codec_id = st->codec->codec_id;
1514 extradata_offset = FFMIN(track->codec_priv.size, 18);
1515 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1516 && (track->codec_priv.size >= 86)
1517 && (track->codec_priv.data != NULL)) {
1518 fourcc = AV_RL32(track->codec_priv.data);
1519 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1520 } else if (codec_id == CODEC_ID_PCM_S16BE) {
1521 switch (track->audio.bitdepth) {
1522 case 8: codec_id = CODEC_ID_PCM_U8; break;
1523 case 24: codec_id = CODEC_ID_PCM_S24BE; break;
1524 case 32: codec_id = CODEC_ID_PCM_S32BE; break;
1526 } else if (codec_id == CODEC_ID_PCM_S16LE) {
1527 switch (track->audio.bitdepth) {
1528 case 8: codec_id = CODEC_ID_PCM_U8; break;
1529 case 24: codec_id = CODEC_ID_PCM_S24LE; break;
1530 case 32: codec_id = CODEC_ID_PCM_S32LE; break;
1532 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1533 codec_id = CODEC_ID_PCM_F64LE;
1534 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1535 int profile = matroska_aac_profile(track->codec_id);
1536 int sri = matroska_aac_sri(track->audio.samplerate);
1537 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1538 if (extradata == NULL)
1539 return AVERROR(ENOMEM);
1540 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1541 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1542 if (strstr(track->codec_id, "SBR")) {
1543 sri = matroska_aac_sri(track->audio.out_samplerate);
1544 extradata[2] = 0x56;
1545 extradata[3] = 0xE5;
1546 extradata[4] = 0x80 | (sri<<3);
1550 } else if (codec_id == CODEC_ID_TTA) {
1551 extradata_size = 30;
1552 extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_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 == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1564 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1565 extradata_offset = 26;
1566 } else if (codec_id == CODEC_ID_RA_144) {
1567 track->audio.out_samplerate = 8000;
1568 track->audio.channels = 1;
1569 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1570 codec_id == CODEC_ID_ATRAC3 || codec_id == 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 == CODEC_ID_RA_288) {
1583 st->codec->block_align = track->audio.coded_framesize;
1584 track->codec_priv.size = 0;
1586 if (codec_id == 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 == CODEC_ID_NONE)
1598 av_log(matroska->ctx, AV_LOG_INFO,
1599 "Unknown/unsupported CodecID %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 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
1635 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1636 st->codec->codec_tag = fourcc;
1637 st->codec->width = track->video.pixel_width;
1638 st->codec->height = track->video.pixel_height;
1639 av_reduce(&st->sample_aspect_ratio.num,
1640 &st->sample_aspect_ratio.den,
1641 st->codec->height * track->video.display_width,
1642 st->codec-> width * track->video.display_height,
1644 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1645 if (track->default_duration)
1646 st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX);
1648 /* export stereo mode flag as metadata tag */
1649 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREO_MODE_COUNT)
1650 av_dict_set(&st->metadata, "stereo_mode", matroska_video_stereo_mode[track->video.stereo_mode], 0);
1652 /* if we have virtual track, mark the real tracks */
1653 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
1655 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
1657 snprintf(buf, sizeof(buf), "%s_%d",
1658 matroska_video_stereo_plane[planes[j].type], i);
1659 for (k=0; k < matroska->tracks.nb_elem; k++)
1660 if (planes[j].uid == tracks[k].uid) {
1661 av_dict_set(&s->streams[k]->metadata,
1662 "stereo_mode", buf, 0);
1666 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1667 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1668 st->codec->sample_rate = track->audio.out_samplerate;
1669 st->codec->channels = track->audio.channels;
1670 if (st->codec->codec_id != CODEC_ID_AAC)
1671 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1672 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1673 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1677 attachements = attachements_list->elem;
1678 for (j=0; j<attachements_list->nb_elem; j++) {
1679 if (!(attachements[j].filename && attachements[j].mime &&
1680 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1681 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1683 AVStream *st = avformat_new_stream(s, NULL);
1686 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
1687 av_dict_set(&st->metadata, "mimetype", attachements[j].mime, 0);
1688 st->codec->codec_id = CODEC_ID_NONE;
1689 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1690 st->codec->extradata = av_malloc(attachements[j].bin.size + FF_INPUT_BUFFER_PADDING_SIZE);
1691 if(st->codec->extradata == NULL)
1693 st->codec->extradata_size = attachements[j].bin.size;
1694 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1696 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1697 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1698 strlen(ff_mkv_mime_tags[i].str))) {
1699 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1703 attachements[j].stream = st;
1707 chapters = chapters_list->elem;
1708 for (i=0; i<chapters_list->nb_elem; i++)
1709 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1710 && (max_start==0 || chapters[i].start > max_start)) {
1711 chapters[i].chapter =
1712 avpriv_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1713 chapters[i].start, chapters[i].end,
1715 av_dict_set(&chapters[i].chapter->metadata,
1716 "title", chapters[i].title, 0);
1717 max_start = chapters[i].start;
1720 matroska_add_index_entries(matroska);
1722 matroska_convert_tags(s);
1728 * Put one packet in an application-supplied AVPacket struct.
1729 * Returns 0 on success or -1 on failure.
1731 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1734 if (matroska->num_packets > 0) {
1735 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1736 av_free(matroska->packets[0]);
1737 if (matroska->num_packets > 1) {
1739 memmove(&matroska->packets[0], &matroska->packets[1],
1740 (matroska->num_packets - 1) * sizeof(AVPacket *));
1741 newpackets = av_realloc(matroska->packets,
1742 (matroska->num_packets - 1) * sizeof(AVPacket *));
1744 matroska->packets = newpackets;
1746 av_freep(&matroska->packets);
1748 matroska->num_packets--;
1756 * Free all packets in our internal queue.
1758 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1760 if (matroska->packets) {
1762 for (n = 0; n < matroska->num_packets; n++) {
1763 av_free_packet(matroska->packets[n]);
1764 av_free(matroska->packets[n]);
1766 av_freep(&matroska->packets);
1767 matroska->num_packets = 0;
1771 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1772 int size, int64_t pos, uint64_t cluster_time,
1773 uint64_t duration, int is_keyframe,
1774 int64_t cluster_pos)
1776 uint64_t timecode = AV_NOPTS_VALUE;
1777 MatroskaTrack *track;
1782 uint32_t *lace_size = NULL;
1783 int n, flags, laces = 0;
1786 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
1787 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1788 return AVERROR_INVALIDDATA;
1793 track = matroska_find_track_by_num(matroska, num);
1794 if (!track || !track->stream) {
1795 av_log(matroska->ctx, AV_LOG_INFO,
1796 "Invalid stream %"PRIu64" or size %u\n", num, size);
1797 return AVERROR_INVALIDDATA;
1798 } else if (size <= 3)
1801 if (st->discard >= AVDISCARD_ALL)
1804 duration = track->default_duration / matroska->time_scale;
1806 block_time = AV_RB16(data);
1810 if (is_keyframe == -1)
1811 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
1813 if (cluster_time != (uint64_t)-1
1814 && (block_time >= 0 || cluster_time >= -block_time)) {
1815 timecode = cluster_time + block_time;
1816 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
1817 && timecode < track->end_timecode)
1818 is_keyframe = 0; /* overlapping subtitles are not key frame */
1820 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
1821 track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
1824 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1825 if (!is_keyframe || timecode < matroska->skip_to_timecode)
1827 matroska->skip_to_keyframe = 0;
1830 switch ((flags & 0x06) >> 1) {
1831 case 0x0: /* no lacing */
1833 lace_size = av_mallocz(sizeof(int));
1834 lace_size[0] = size;
1837 case 0x1: /* Xiph lacing */
1838 case 0x2: /* fixed-size lacing */
1839 case 0x3: /* EBML lacing */
1840 assert(size>0); // size <=3 is checked before size-=3 above
1841 laces = (*data) + 1;
1844 lace_size = av_mallocz(laces * sizeof(int));
1846 switch ((flags & 0x06) >> 1) {
1847 case 0x1: /* Xiph lacing */ {
1850 for (n = 0; res == 0 && n < laces - 1; n++) {
1857 lace_size[n] += temp;
1863 total += lace_size[n];
1865 lace_size[n] = size - total;
1869 case 0x2: /* fixed-size lacing */
1870 for (n = 0; n < laces; n++)
1871 lace_size[n] = size / laces;
1874 case 0x3: /* EBML lacing */ {
1876 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1878 av_log(matroska->ctx, AV_LOG_INFO,
1879 "EBML block data error\n");
1884 total = lace_size[0] = num;
1885 for (n = 1; res == 0 && n < laces - 1; n++) {
1888 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1890 av_log(matroska->ctx, AV_LOG_INFO,
1891 "EBML block data error\n");
1896 lace_size[n] = lace_size[n - 1] + snum;
1897 total += lace_size[n];
1899 lace_size[laces - 1] = size - total;
1907 for (n = 0; n < laces; n++) {
1908 if ((st->codec->codec_id == CODEC_ID_RA_288 ||
1909 st->codec->codec_id == CODEC_ID_COOK ||
1910 st->codec->codec_id == CODEC_ID_SIPR ||
1911 st->codec->codec_id == CODEC_ID_ATRAC3) &&
1912 st->codec->block_align && track->audio.sub_packet_size) {
1913 int a = st->codec->block_align;
1914 int sps = track->audio.sub_packet_size;
1915 int cfs = track->audio.coded_framesize;
1916 int h = track->audio.sub_packet_h;
1917 int y = track->audio.sub_packet_cnt;
1918 int w = track->audio.frame_size;
1921 if (!track->audio.pkt_cnt) {
1922 if (track->audio.sub_packet_cnt == 0)
1923 track->audio.buf_timecode = timecode;
1924 if (st->codec->codec_id == CODEC_ID_RA_288) {
1925 if (size < cfs * h / 2) {
1926 av_log(matroska->ctx, AV_LOG_ERROR,
1927 "Corrupt int4 RM-style audio packet size\n");
1928 return AVERROR_INVALIDDATA;
1930 for (x=0; x<h/2; x++)
1931 memcpy(track->audio.buf+x*2*w+y*cfs,
1933 } else if (st->codec->codec_id == CODEC_ID_SIPR) {
1935 av_log(matroska->ctx, AV_LOG_ERROR,
1936 "Corrupt sipr RM-style audio packet size\n");
1937 return AVERROR_INVALIDDATA;
1939 memcpy(track->audio.buf + y*w, data, w);
1941 if (size < sps * w / sps) {
1942 av_log(matroska->ctx, AV_LOG_ERROR,
1943 "Corrupt generic RM-style audio packet size\n");
1944 return AVERROR_INVALIDDATA;
1946 for (x=0; x<w/sps; x++)
1947 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1950 if (++track->audio.sub_packet_cnt >= h) {
1951 if (st->codec->codec_id == CODEC_ID_SIPR)
1952 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
1953 track->audio.sub_packet_cnt = 0;
1954 track->audio.pkt_cnt = h*w / a;
1957 while (track->audio.pkt_cnt) {
1958 pkt = av_mallocz(sizeof(AVPacket));
1959 av_new_packet(pkt, a);
1960 memcpy(pkt->data, track->audio.buf
1961 + a * (h*w / a - track->audio.pkt_cnt--), a);
1962 pkt->pts = track->audio.buf_timecode;
1963 track->audio.buf_timecode = AV_NOPTS_VALUE;
1965 pkt->stream_index = st->index;
1966 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1969 MatroskaTrackEncoding *encodings = track->encodings.elem;
1970 int offset = 0, pkt_size = lace_size[n];
1971 uint8_t *pkt_data = data;
1973 if (pkt_size > size) {
1974 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
1978 if (encodings && encodings->scope & 1) {
1979 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1984 pkt = av_mallocz(sizeof(AVPacket));
1985 /* XXX: prevent data copy... */
1986 if (av_new_packet(pkt, pkt_size+offset) < 0) {
1988 res = AVERROR(ENOMEM);
1992 memcpy (pkt->data, encodings->compression.settings.data, offset);
1993 memcpy (pkt->data+offset, pkt_data, pkt_size);
1995 if (pkt_data != data)
1999 pkt->flags = is_keyframe;
2000 pkt->stream_index = st->index;
2002 if (track->ms_compat)
2003 pkt->dts = timecode;
2005 pkt->pts = timecode;
2007 if (st->codec->codec_id == CODEC_ID_TEXT)
2008 pkt->convergence_duration = duration;
2009 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
2010 pkt->duration = duration;
2012 if (st->codec->codec_id == CODEC_ID_SSA)
2013 matroska_fix_ass_packet(matroska, pkt, duration);
2015 if (matroska->prev_pkt &&
2016 timecode != AV_NOPTS_VALUE &&
2017 matroska->prev_pkt->pts == timecode &&
2018 matroska->prev_pkt->stream_index == st->index &&
2019 st->codec->codec_id == CODEC_ID_SSA)
2020 matroska_merge_packets(matroska->prev_pkt, pkt);
2022 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
2023 matroska->prev_pkt = pkt;
2027 if (timecode != AV_NOPTS_VALUE)
2028 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2029 data += lace_size[n];
2030 size -= lace_size[n];
2038 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2040 MatroskaCluster cluster = { 0 };
2041 EbmlList *blocks_list;
2042 MatroskaBlock *blocks;
2044 int64_t pos = avio_tell(matroska->ctx->pb);
2045 matroska->prev_pkt = NULL;
2046 if (matroska->current_id)
2047 pos -= 4; /* sizeof the ID which was already read */
2048 res = ebml_parse(matroska, matroska_clusters, &cluster);
2049 blocks_list = &cluster.blocks;
2050 blocks = blocks_list->elem;
2051 for (i=0; i<blocks_list->nb_elem; i++)
2052 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2053 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2054 res=matroska_parse_block(matroska,
2055 blocks[i].bin.data, blocks[i].bin.size,
2056 blocks[i].bin.pos, cluster.timecode,
2057 blocks[i].duration, is_keyframe,
2060 ebml_free(matroska_cluster, &cluster);
2064 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2066 MatroskaDemuxContext *matroska = s->priv_data;
2068 while (matroska_deliver_packet(matroska, pkt)) {
2069 int64_t pos = avio_tell(matroska->ctx->pb);
2072 if (matroska_parse_cluster(matroska) < 0)
2073 matroska_resync(matroska, pos);
2079 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2080 int64_t timestamp, int flags)
2082 MatroskaDemuxContext *matroska = s->priv_data;
2083 MatroskaTrack *tracks = matroska->tracks.elem;
2084 AVStream *st = s->streams[stream_index];
2085 int i, index, index_sub, index_min;
2087 /* Parse the CUES now since we need the index data to seek. */
2088 if (matroska->cues_parsing_deferred > 0) {
2089 matroska->cues_parsing_deferred = 0;
2090 matroska_parse_cues(matroska);
2093 if (!st->nb_index_entries)
2095 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2097 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2098 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
2099 matroska->current_id = 0;
2100 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2101 matroska_clear_queue(matroska);
2102 if (matroska_parse_cluster(matroska) < 0)
2107 matroska_clear_queue(matroska);
2108 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
2112 for (i=0; i < matroska->tracks.nb_elem; i++) {
2113 tracks[i].audio.pkt_cnt = 0;
2114 tracks[i].audio.sub_packet_cnt = 0;
2115 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2116 tracks[i].end_timecode = 0;
2117 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
2118 && !tracks[i].stream->discard != AVDISCARD_ALL) {
2119 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
2121 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
2122 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
2123 index_min = index_sub;
2127 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2128 matroska->current_id = 0;
2129 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2130 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2132 matroska->num_levels = 0;
2133 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2136 // slightly hackish but allows proper fallback to
2137 // the generic seeking code.
2138 matroska_clear_queue(matroska);
2139 matroska->current_id = 0;
2140 matroska->skip_to_keyframe = 0;
2142 matroska->num_levels = 0;
2146 static int matroska_read_close(AVFormatContext *s)
2148 MatroskaDemuxContext *matroska = s->priv_data;
2149 MatroskaTrack *tracks = matroska->tracks.elem;
2152 matroska_clear_queue(matroska);
2154 for (n=0; n < matroska->tracks.nb_elem; n++)
2155 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2156 av_free(tracks[n].audio.buf);
2157 ebml_free(matroska_segment, matroska);
2162 AVInputFormat ff_matroska_demuxer = {
2163 .name = "matroska,webm",
2164 .long_name = NULL_IF_CONFIG_SMALL("Matroska/WebM file format"),
2165 .priv_data_size = sizeof(MatroskaDemuxContext),
2166 .read_probe = matroska_probe,
2167 .read_header = matroska_read_header,
2168 .read_packet = matroska_read_packet,
2169 .read_close = matroska_read_close,
2170 .read_seek = matroska_read_seek,