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 * by Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * 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_readwrite.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;
216 AVFormatContext *ctx;
220 MatroskaLevel levels[EBML_MAX_DEPTH];
228 EbmlList attachments;
234 /* byte position of the segment inside the stream */
235 int64_t segment_start;
237 /* the packet queue */
244 /* What to skip before effectively reading a packet. */
245 int skip_to_keyframe;
246 uint64_t skip_to_timecode;
248 /* File has a CUES element, but we defer parsing until it is needed. */
249 int cues_parsing_deferred;
250 } MatroskaDemuxContext;
264 static EbmlSyntax ebml_header[] = {
265 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
266 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
267 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
268 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
269 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
270 { EBML_ID_EBMLVERSION, EBML_NONE },
271 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
275 static EbmlSyntax ebml_syntax[] = {
276 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
280 static EbmlSyntax matroska_info[] = {
281 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
282 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
283 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
284 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
285 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
286 { MATROSKA_ID_DATEUTC, EBML_NONE },
287 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
291 static EbmlSyntax matroska_track_video[] = {
292 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
293 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
294 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
295 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
296 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
297 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) },
298 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
299 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
300 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
301 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
302 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
303 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
304 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE },
305 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
309 static EbmlSyntax matroska_track_audio[] = {
310 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
311 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
312 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
313 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
317 static EbmlSyntax matroska_track_encoding_compression[] = {
318 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
319 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
323 static EbmlSyntax matroska_track_encoding[] = {
324 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
325 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
326 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
327 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
331 static EbmlSyntax matroska_track_encodings[] = {
332 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
336 static EbmlSyntax matroska_track[] = {
337 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
338 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
339 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
340 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
341 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
342 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
343 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
344 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
345 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
346 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
347 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
348 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
349 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
350 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
351 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
352 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
353 { MATROSKA_ID_CODECNAME, EBML_NONE },
354 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
355 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
356 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
357 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
358 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
359 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
363 static EbmlSyntax matroska_tracks[] = {
364 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
368 static EbmlSyntax matroska_attachment[] = {
369 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
370 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
371 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
372 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
373 { MATROSKA_ID_FILEDESC, EBML_NONE },
377 static EbmlSyntax matroska_attachments[] = {
378 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
382 static EbmlSyntax matroska_chapter_display[] = {
383 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
384 { MATROSKA_ID_CHAPLANG, EBML_NONE },
388 static EbmlSyntax matroska_chapter_entry[] = {
389 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
390 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
391 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
392 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
393 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
394 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
395 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
396 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
400 static EbmlSyntax matroska_chapter[] = {
401 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
402 { MATROSKA_ID_EDITIONUID, EBML_NONE },
403 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
404 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
405 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
409 static EbmlSyntax matroska_chapters[] = {
410 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
414 static EbmlSyntax matroska_index_pos[] = {
415 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
416 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
417 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
421 static EbmlSyntax matroska_index_entry[] = {
422 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
423 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
427 static EbmlSyntax matroska_index[] = {
428 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
432 static EbmlSyntax matroska_simpletag[] = {
433 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
434 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
435 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
436 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
437 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
438 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
442 static EbmlSyntax matroska_tagtargets[] = {
443 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
444 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
445 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
446 { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
447 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
451 static EbmlSyntax matroska_tag[] = {
452 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
453 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
457 static EbmlSyntax matroska_tags[] = {
458 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
462 static EbmlSyntax matroska_seekhead_entry[] = {
463 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
464 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
468 static EbmlSyntax matroska_seekhead[] = {
469 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
473 static EbmlSyntax matroska_segment[] = {
474 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
475 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
476 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
477 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
478 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
479 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
480 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
481 { MATROSKA_ID_CLUSTER, EBML_STOP },
485 static EbmlSyntax matroska_segments[] = {
486 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
490 static EbmlSyntax matroska_blockgroup[] = {
491 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
492 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
493 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
494 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
495 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
499 static EbmlSyntax matroska_cluster[] = {
500 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
501 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
502 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
503 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
504 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
508 static EbmlSyntax matroska_clusters[] = {
509 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
510 { MATROSKA_ID_INFO, EBML_NONE },
511 { MATROSKA_ID_CUES, EBML_NONE },
512 { MATROSKA_ID_TAGS, EBML_NONE },
513 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
517 static const char *matroska_doctypes[] = { "matroska", "webm" };
520 * Return: Whether we reached the end of a level in the hierarchy or not.
522 static int ebml_level_end(MatroskaDemuxContext *matroska)
524 AVIOContext *pb = matroska->ctx->pb;
525 int64_t pos = avio_tell(pb);
527 if (matroska->num_levels > 0) {
528 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
529 if (pos - level->start >= level->length || matroska->current_id) {
530 matroska->num_levels--;
538 * Read: an "EBML number", which is defined as a variable-length
539 * array of bytes. The first byte indicates the length by giving a
540 * number of 0-bits followed by a one. The position of the first
541 * "one" bit inside the first byte indicates the length of this
543 * Returns: number of bytes read, < 0 on error
545 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
546 int max_size, uint64_t *number)
551 /* The first byte tells us the length in bytes - avio_r8() can normally
552 * return 0, but since that's not a valid first ebmlID byte, we can
553 * use it safely here to catch EOS. */
554 if (!(total = avio_r8(pb))) {
555 /* we might encounter EOS here */
556 if (!pb->eof_reached) {
557 int64_t pos = avio_tell(pb);
558 av_log(matroska->ctx, AV_LOG_ERROR,
559 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
562 return AVERROR(EIO); /* EOS or actual I/O error */
565 /* get the length of the EBML number */
566 read = 8 - ff_log2_tab[total];
567 if (read > max_size) {
568 int64_t pos = avio_tell(pb) - 1;
569 av_log(matroska->ctx, AV_LOG_ERROR,
570 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
571 (uint8_t) total, pos, pos);
572 return AVERROR_INVALIDDATA;
575 /* read out length */
576 total ^= 1 << ff_log2_tab[total];
578 total = (total << 8) | avio_r8(pb);
586 * Read a EBML length value.
587 * This needs special handling for the "unknown length" case which has multiple
590 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
593 int res = ebml_read_num(matroska, pb, 8, number);
594 if (res > 0 && *number + 1 == 1ULL << (7 * res))
595 *number = 0xffffffffffffffULL;
600 * Read the next element as an unsigned int.
601 * 0 is success, < 0 is failure.
603 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
608 return AVERROR_INVALIDDATA;
610 /* big-endian ordering; build up number */
613 *num = (*num << 8) | avio_r8(pb);
619 * Read the next element as a float.
620 * 0 is success, < 0 is failure.
622 static int ebml_read_float(AVIOContext *pb, int size, double *num)
626 } else if (size == 4) {
627 *num= av_int2flt(avio_rb32(pb));
629 *num= av_int2dbl(avio_rb64(pb));
631 return AVERROR_INVALIDDATA;
637 * Read the next element as an ASCII string.
638 * 0 is success, < 0 is failure.
640 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
643 /* EBML strings are usually not 0-terminated, so we allocate one
644 * byte more, read the string and NULL-terminate it ourselves. */
645 if (!(*str = av_malloc(size + 1)))
646 return AVERROR(ENOMEM);
647 if (avio_read(pb, (uint8_t *) *str, size) != size) {
657 * Read the next element as binary data.
658 * 0 is success, < 0 is failure.
660 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
663 if (!(bin->data = av_malloc(length)))
664 return AVERROR(ENOMEM);
667 bin->pos = avio_tell(pb);
668 if (avio_read(pb, bin->data, length) != length) {
669 av_freep(&bin->data);
677 * Read the next element, but only the header. The contents
678 * are supposed to be sub-elements which can be read separately.
679 * 0 is success, < 0 is failure.
681 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
683 AVIOContext *pb = matroska->ctx->pb;
684 MatroskaLevel *level;
686 if (matroska->num_levels >= EBML_MAX_DEPTH) {
687 av_log(matroska->ctx, AV_LOG_ERROR,
688 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
689 return AVERROR(ENOSYS);
692 level = &matroska->levels[matroska->num_levels++];
693 level->start = avio_tell(pb);
694 level->length = length;
700 * Read signed/unsigned "EBML" numbers.
701 * Return: number of bytes processed, < 0 on error
703 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
704 uint8_t *data, uint32_t size, uint64_t *num)
707 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
708 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
712 * Same as above, but signed.
714 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
715 uint8_t *data, uint32_t size, int64_t *num)
720 /* read as unsigned number first */
721 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
724 /* make signed (weird way) */
725 *num = unum - ((1LL << (7*res - 1)) - 1);
730 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
731 EbmlSyntax *syntax, void *data);
733 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
734 uint32_t id, void *data)
737 for (i=0; syntax[i].id; i++)
738 if (id == syntax[i].id)
740 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
741 matroska->num_levels > 0 &&
742 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
743 return 0; // we reached the end of an unknown size cluster
744 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32)
745 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
746 return ebml_parse_elem(matroska, &syntax[i], data);
749 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
752 if (!matroska->current_id) {
754 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
757 matroska->current_id = id | 1 << 7*res;
759 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
762 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
767 for (i=0; syntax[i].id; i++)
768 switch (syntax[i].type) {
770 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
773 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
777 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
781 while (!res && !ebml_level_end(matroska))
782 res = ebml_parse(matroska, syntax, data);
787 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
788 EbmlSyntax *syntax, void *data)
790 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
793 // max. 16 MB for strings
794 [EBML_STR] = 0x1000000,
795 [EBML_UTF8] = 0x1000000,
796 // max. 256 MB for binary data
797 [EBML_BIN] = 0x10000000,
798 // no limits for anything else
800 AVIOContext *pb = matroska->ctx->pb;
801 uint32_t id = syntax->id;
805 data = (char *)data + syntax->data_offset;
806 if (syntax->list_elem_size) {
807 EbmlList *list = data;
808 list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
809 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
810 memset(data, 0, syntax->list_elem_size);
814 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
815 matroska->current_id = 0;
816 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
818 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
819 av_log(matroska->ctx, AV_LOG_ERROR,
820 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
821 length, max_lengths[syntax->type], syntax->type);
822 return AVERROR_INVALIDDATA;
826 switch (syntax->type) {
827 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
828 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
830 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
831 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
832 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
834 if (id == MATROSKA_ID_SEGMENT)
835 matroska->segment_start = avio_tell(matroska->ctx->pb);
836 return ebml_parse_nest(matroska, syntax->def.n, data);
837 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
838 case EBML_STOP: return 1;
839 default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
841 if (res == AVERROR_INVALIDDATA)
842 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
843 else if (res == AVERROR(EIO))
844 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
848 static void ebml_free(EbmlSyntax *syntax, void *data)
851 for (i=0; syntax[i].id; i++) {
852 void *data_off = (char *)data + syntax[i].data_offset;
853 switch (syntax[i].type) {
855 case EBML_UTF8: av_freep(data_off); break;
856 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
858 if (syntax[i].list_elem_size) {
859 EbmlList *list = data_off;
860 char *ptr = list->elem;
861 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
862 ebml_free(syntax[i].def.n, ptr);
865 ebml_free(syntax[i].def.n, data_off);
875 static int matroska_probe(AVProbeData *p)
878 int len_mask = 0x80, size = 1, n = 1, i;
881 if (AV_RB32(p->buf) != EBML_ID_HEADER)
884 /* length of header */
886 while (size <= 8 && !(total & len_mask)) {
892 total &= (len_mask - 1);
894 total = (total << 8) | p->buf[4 + n++];
896 /* Does the probe data contain the whole header? */
897 if (p->buf_size < 4 + size + total)
900 /* The header should contain a known document type. For now,
901 * we don't parse the whole header but simply check for the
902 * availability of that array of characters inside the header.
903 * Not fully fool-proof, but good enough. */
904 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
905 int probelen = strlen(matroska_doctypes[i]);
906 for (n = 4+size; n <= 4+size+total-probelen; n++)
907 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
908 return AVPROBE_SCORE_MAX;
911 // probably valid EBML header but no recognized doctype
912 return AVPROBE_SCORE_MAX/2;
915 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
918 MatroskaTrack *tracks = matroska->tracks.elem;
921 for (i=0; i < matroska->tracks.nb_elem; i++)
922 if (tracks[i].num == num)
925 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
929 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
930 MatroskaTrack *track)
932 MatroskaTrackEncoding *encodings = track->encodings.elem;
933 uint8_t* data = *buf;
934 int isize = *buf_size;
935 uint8_t* pkt_data = NULL;
936 int pkt_size = isize;
940 if (pkt_size >= 10000000)
943 switch (encodings[0].compression.algo) {
944 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
945 return encodings[0].compression.settings.size;
946 case MATROSKA_TRACK_ENCODING_COMP_LZO:
948 olen = pkt_size *= 3;
949 pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
950 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
951 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
957 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
958 z_stream zstream = {0};
959 if (inflateInit(&zstream) != Z_OK)
961 zstream.next_in = data;
962 zstream.avail_in = isize;
965 pkt_data = av_realloc(pkt_data, pkt_size);
966 zstream.avail_out = pkt_size - zstream.total_out;
967 zstream.next_out = pkt_data + zstream.total_out;
968 result = inflate(&zstream, Z_NO_FLUSH);
969 } while (result==Z_OK && pkt_size<10000000);
970 pkt_size = zstream.total_out;
971 inflateEnd(&zstream);
972 if (result != Z_STREAM_END)
978 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
979 bz_stream bzstream = {0};
980 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
982 bzstream.next_in = data;
983 bzstream.avail_in = isize;
986 pkt_data = av_realloc(pkt_data, pkt_size);
987 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
988 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
989 result = BZ2_bzDecompress(&bzstream);
990 } while (result==BZ_OK && pkt_size<10000000);
991 pkt_size = bzstream.total_out_lo32;
992 BZ2_bzDecompressEnd(&bzstream);
993 if (result != BZ_STREAM_END)
1003 *buf_size = pkt_size;
1010 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1011 AVPacket *pkt, uint64_t display_duration)
1013 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
1014 for (; *ptr!=',' && ptr<end-1; ptr++);
1017 for (; *ptr!=',' && ptr<end-1; ptr++);
1019 int64_t end_pts = pkt->pts + display_duration;
1020 int sc = matroska->time_scale * pkt->pts / 10000000;
1021 int ec = matroska->time_scale * end_pts / 10000000;
1022 int sh, sm, ss, eh, em, es, len;
1023 sh = sc/360000; sc -= 360000*sh;
1024 sm = sc/ 6000; sc -= 6000*sm;
1025 ss = sc/ 100; sc -= 100*ss;
1026 eh = ec/360000; ec -= 360000*eh;
1027 em = ec/ 6000; ec -= 6000*em;
1028 es = ec/ 100; ec -= 100*es;
1030 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1031 if (!(line = av_malloc(len)))
1033 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1034 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1037 pkt->size = strlen(line);
1041 static void matroska_merge_packets(AVPacket *out, AVPacket *in)
1043 out->data = av_realloc(out->data, out->size+in->size);
1044 memcpy(out->data+out->size, in->data, in->size);
1045 out->size += in->size;
1046 av_destruct_packet(in);
1050 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1051 AVDictionary **metadata, char *prefix)
1053 MatroskaTag *tags = list->elem;
1057 for (i=0; i < list->nb_elem; i++) {
1058 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1060 if (!tags[i].name) {
1061 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1064 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1065 else av_strlcpy(key, tags[i].name, sizeof(key));
1066 if (tags[i].def || !lang) {
1067 av_dict_set(metadata, key, tags[i].string, 0);
1068 if (tags[i].sub.nb_elem)
1069 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1072 av_strlcat(key, "-", sizeof(key));
1073 av_strlcat(key, lang, sizeof(key));
1074 av_dict_set(metadata, key, tags[i].string, 0);
1075 if (tags[i].sub.nb_elem)
1076 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1079 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1082 static void matroska_convert_tags(AVFormatContext *s)
1084 MatroskaDemuxContext *matroska = s->priv_data;
1085 MatroskaTags *tags = matroska->tags.elem;
1088 for (i=0; i < matroska->tags.nb_elem; i++) {
1089 if (tags[i].target.attachuid) {
1090 MatroskaAttachement *attachment = matroska->attachments.elem;
1091 for (j=0; j<matroska->attachments.nb_elem; j++)
1092 if (attachment[j].uid == tags[i].target.attachuid
1093 && attachment[j].stream)
1094 matroska_convert_tag(s, &tags[i].tag,
1095 &attachment[j].stream->metadata, NULL);
1096 } else if (tags[i].target.chapteruid) {
1097 MatroskaChapter *chapter = matroska->chapters.elem;
1098 for (j=0; j<matroska->chapters.nb_elem; j++)
1099 if (chapter[j].uid == tags[i].target.chapteruid
1100 && chapter[j].chapter)
1101 matroska_convert_tag(s, &tags[i].tag,
1102 &chapter[j].chapter->metadata, NULL);
1103 } else if (tags[i].target.trackuid) {
1104 MatroskaTrack *track = matroska->tracks.elem;
1105 for (j=0; j<matroska->tracks.nb_elem; j++)
1106 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1107 matroska_convert_tag(s, &tags[i].tag,
1108 &track[j].stream->metadata, NULL);
1110 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1111 tags[i].target.type);
1116 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
1118 EbmlList *seekhead_list = &matroska->seekhead;
1119 MatroskaSeekhead *seekhead = seekhead_list->elem;
1120 uint32_t level_up = matroska->level_up;
1121 int64_t before_pos = avio_tell(matroska->ctx->pb);
1122 uint32_t saved_id = matroska->current_id;
1123 MatroskaLevel level;
1127 if (idx >= seekhead_list->nb_elem
1128 || seekhead[idx].id == MATROSKA_ID_SEEKHEAD
1129 || seekhead[idx].id == MATROSKA_ID_CLUSTER)
1133 offset = seekhead[idx].pos + matroska->segment_start;
1134 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1135 /* We don't want to lose our seekhead level, so we add
1136 * a dummy. This is a crude hack. */
1137 if (matroska->num_levels == EBML_MAX_DEPTH) {
1138 av_log(matroska->ctx, AV_LOG_INFO,
1139 "Max EBML element depth (%d) reached, "
1140 "cannot parse further.\n", EBML_MAX_DEPTH);
1141 ret = AVERROR_INVALIDDATA;
1144 level.length = (uint64_t)-1;
1145 matroska->levels[matroska->num_levels] = level;
1146 matroska->num_levels++;
1147 matroska->current_id = 0;
1149 ebml_parse(matroska, matroska_segment, matroska);
1151 /* remove dummy level */
1152 while (matroska->num_levels) {
1153 uint64_t length = matroska->levels[--matroska->num_levels].length;
1154 if (length == (uint64_t)-1)
1160 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1161 matroska->level_up = level_up;
1162 matroska->current_id = saved_id;
1167 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1169 EbmlList *seekhead_list = &matroska->seekhead;
1170 MatroskaSeekhead *seekhead = seekhead_list->elem;
1171 int64_t before_pos = avio_tell(matroska->ctx->pb);
1174 // we should not do any seeking in the streaming case
1175 if (!matroska->ctx->pb->seekable ||
1176 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1179 for (i = 0; i < seekhead_list->nb_elem; i++) {
1180 if (seekhead[i].pos <= before_pos)
1183 // defer cues parsing until we actually need cue data.
1184 if (seekhead[i].id == MATROSKA_ID_CUES) {
1185 matroska->cues_parsing_deferred = 1;
1189 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1194 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1195 EbmlList *seekhead_list = &matroska->seekhead;
1196 MatroskaSeekhead *seekhead = seekhead_list->elem;
1197 EbmlList *index_list;
1198 MatroskaIndex *index;
1199 int index_scale = 1;
1202 for (i = 0; i < seekhead_list->nb_elem; i++)
1203 if (seekhead[i].id != MATROSKA_ID_CUES)
1205 assert(i <= seekhead_list->nb_elem);
1207 matroska_parse_seekhead_entry(matroska, i);
1209 index_list = &matroska->index;
1210 index = index_list->elem;
1211 if (index_list->nb_elem
1212 && index[0].time > 1E14/matroska->time_scale) {
1213 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1214 index_scale = matroska->time_scale;
1216 for (i = 0; i < index_list->nb_elem; i++) {
1217 EbmlList *pos_list = &index[i].pos;
1218 MatroskaIndexPos *pos = pos_list->elem;
1219 for (j = 0; j < pos_list->nb_elem; j++) {
1220 MatroskaTrack *track = matroska_find_track_by_num(matroska, pos[j].track);
1221 if (track && track->stream)
1222 av_add_index_entry(track->stream,
1223 pos[j].pos + matroska->segment_start,
1224 index[i].time/index_scale, 0, 0,
1230 static int matroska_aac_profile(char *codec_id)
1232 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1235 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1236 if (strstr(codec_id, aac_profiles[profile]))
1241 static int matroska_aac_sri(int samplerate)
1245 for (sri=0; sri<FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++)
1246 if (ff_mpeg4audio_sample_rates[sri] == samplerate)
1251 static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
1253 MatroskaDemuxContext *matroska = s->priv_data;
1254 EbmlList *attachements_list = &matroska->attachments;
1255 MatroskaAttachement *attachements;
1256 EbmlList *chapters_list = &matroska->chapters;
1257 MatroskaChapter *chapters;
1258 MatroskaTrack *tracks;
1259 uint64_t max_start = 0;
1266 /* First read the EBML header. */
1267 if (ebml_parse(matroska, ebml_syntax, &ebml)
1268 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1269 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) {
1270 av_log(matroska->ctx, AV_LOG_ERROR,
1271 "EBML header using unsupported features\n"
1272 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1273 ebml.version, ebml.doctype, ebml.doctype_version);
1274 ebml_free(ebml_syntax, &ebml);
1275 return AVERROR_PATCHWELCOME;
1277 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1278 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1280 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1281 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1283 ebml_free(ebml_syntax, &ebml);
1285 /* The next thing is a segment. */
1286 if ((res = ebml_parse(matroska, matroska_segments, matroska)) < 0)
1288 matroska_execute_seekhead(matroska);
1290 if (!matroska->time_scale)
1291 matroska->time_scale = 1000000;
1292 if (matroska->duration)
1293 matroska->ctx->duration = matroska->duration * matroska->time_scale
1294 * 1000 / AV_TIME_BASE;
1295 av_dict_set(&s->metadata, "title", matroska->title, 0);
1297 tracks = matroska->tracks.elem;
1298 for (i=0; i < matroska->tracks.nb_elem; i++) {
1299 MatroskaTrack *track = &tracks[i];
1300 enum CodecID codec_id = CODEC_ID_NONE;
1301 EbmlList *encodings_list = &tracks->encodings;
1302 MatroskaTrackEncoding *encodings = encodings_list->elem;
1303 uint8_t *extradata = NULL;
1304 int extradata_size = 0;
1305 int extradata_offset = 0;
1308 /* Apply some sanity checks. */
1309 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1310 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1311 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1312 av_log(matroska->ctx, AV_LOG_INFO,
1313 "Unknown or unsupported track type %"PRIu64"\n",
1317 if (track->codec_id == NULL)
1320 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1321 if (!track->default_duration)
1322 track->default_duration = 1000000000/track->video.frame_rate;
1323 if (!track->video.display_width)
1324 track->video.display_width = track->video.pixel_width;
1325 if (!track->video.display_height)
1326 track->video.display_height = track->video.pixel_height;
1327 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1328 if (!track->audio.out_samplerate)
1329 track->audio.out_samplerate = track->audio.samplerate;
1331 if (encodings_list->nb_elem > 1) {
1332 av_log(matroska->ctx, AV_LOG_ERROR,
1333 "Multiple combined encodings no supported");
1334 } else if (encodings_list->nb_elem == 1) {
1335 if (encodings[0].type ||
1336 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1338 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1341 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1343 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1344 encodings[0].scope = 0;
1345 av_log(matroska->ctx, AV_LOG_ERROR,
1346 "Unsupported encoding type");
1347 } else if (track->codec_priv.size && encodings[0].scope&2) {
1348 uint8_t *codec_priv = track->codec_priv.data;
1349 int offset = matroska_decode_buffer(&track->codec_priv.data,
1350 &track->codec_priv.size,
1353 track->codec_priv.data = NULL;
1354 track->codec_priv.size = 0;
1355 av_log(matroska->ctx, AV_LOG_ERROR,
1356 "Failed to decode codec private data\n");
1357 } else if (offset > 0) {
1358 track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1359 memcpy(track->codec_priv.data,
1360 encodings[0].compression.settings.data, offset);
1361 memcpy(track->codec_priv.data+offset, codec_priv,
1362 track->codec_priv.size);
1363 track->codec_priv.size += offset;
1365 if (codec_priv != track->codec_priv.data)
1366 av_free(codec_priv);
1370 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1371 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1372 strlen(ff_mkv_codec_tags[j].str))){
1373 codec_id= ff_mkv_codec_tags[j].id;
1378 st = track->stream = av_new_stream(s, 0);
1380 return AVERROR(ENOMEM);
1382 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1383 && track->codec_priv.size >= 40
1384 && track->codec_priv.data != NULL) {
1385 track->ms_compat = 1;
1386 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1387 codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc);
1388 extradata_offset = 40;
1389 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1390 && track->codec_priv.size >= 14
1391 && track->codec_priv.data != NULL) {
1393 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1394 AVIO_FLAG_READ, NULL, NULL, NULL, NULL);
1395 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1398 codec_id = st->codec->codec_id;
1399 extradata_offset = FFMIN(track->codec_priv.size, 18);
1400 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1401 && (track->codec_priv.size >= 86)
1402 && (track->codec_priv.data != NULL)) {
1403 track->video.fourcc = AV_RL32(track->codec_priv.data);
1404 codec_id=ff_codec_get_id(codec_movvideo_tags, track->video.fourcc);
1405 } else if (codec_id == CODEC_ID_PCM_S16BE) {
1406 switch (track->audio.bitdepth) {
1407 case 8: codec_id = CODEC_ID_PCM_U8; break;
1408 case 24: codec_id = CODEC_ID_PCM_S24BE; break;
1409 case 32: codec_id = CODEC_ID_PCM_S32BE; break;
1411 } else if (codec_id == CODEC_ID_PCM_S16LE) {
1412 switch (track->audio.bitdepth) {
1413 case 8: codec_id = CODEC_ID_PCM_U8; break;
1414 case 24: codec_id = CODEC_ID_PCM_S24LE; break;
1415 case 32: codec_id = CODEC_ID_PCM_S32LE; break;
1417 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1418 codec_id = CODEC_ID_PCM_F64LE;
1419 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1420 int profile = matroska_aac_profile(track->codec_id);
1421 int sri = matroska_aac_sri(track->audio.samplerate);
1422 extradata = av_malloc(5);
1423 if (extradata == NULL)
1424 return AVERROR(ENOMEM);
1425 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1426 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1427 if (strstr(track->codec_id, "SBR")) {
1428 sri = matroska_aac_sri(track->audio.out_samplerate);
1429 extradata[2] = 0x56;
1430 extradata[3] = 0xE5;
1431 extradata[4] = 0x80 | (sri<<3);
1435 } else if (codec_id == CODEC_ID_TTA) {
1436 extradata_size = 30;
1437 extradata = av_mallocz(extradata_size);
1438 if (extradata == NULL)
1439 return AVERROR(ENOMEM);
1440 ffio_init_context(&b, extradata, extradata_size, 1,
1441 NULL, NULL, NULL, NULL);
1442 avio_write(&b, "TTA1", 4);
1444 avio_wl16(&b, track->audio.channels);
1445 avio_wl16(&b, track->audio.bitdepth);
1446 avio_wl32(&b, track->audio.out_samplerate);
1447 avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1448 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1449 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1450 extradata_offset = 26;
1451 } else if (codec_id == CODEC_ID_RA_144) {
1452 track->audio.out_samplerate = 8000;
1453 track->audio.channels = 1;
1454 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1455 codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) {
1457 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
1458 0, NULL, NULL, NULL, NULL);
1460 flavor = avio_rb16(&b);
1461 track->audio.coded_framesize = avio_rb32(&b);
1463 track->audio.sub_packet_h = avio_rb16(&b);
1464 track->audio.frame_size = avio_rb16(&b);
1465 track->audio.sub_packet_size = avio_rb16(&b);
1466 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1467 if (codec_id == CODEC_ID_RA_288) {
1468 st->codec->block_align = track->audio.coded_framesize;
1469 track->codec_priv.size = 0;
1471 if (codec_id == CODEC_ID_SIPR && flavor < 4) {
1472 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1473 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1474 st->codec->bit_rate = sipr_bit_rate[flavor];
1476 st->codec->block_align = track->audio.sub_packet_size;
1477 extradata_offset = 78;
1480 track->codec_priv.size -= extradata_offset;
1482 if (codec_id == CODEC_ID_NONE)
1483 av_log(matroska->ctx, AV_LOG_INFO,
1484 "Unknown/unsupported CodecID %s.\n", track->codec_id);
1486 if (track->time_scale < 0.01)
1487 track->time_scale = 1.0;
1488 av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1490 st->codec->codec_id = codec_id;
1492 if (strcmp(track->language, "und"))
1493 av_dict_set(&st->metadata, "language", track->language, 0);
1494 av_dict_set(&st->metadata, "title", track->name, 0);
1496 if (track->flag_default)
1497 st->disposition |= AV_DISPOSITION_DEFAULT;
1498 if (track->flag_forced)
1499 st->disposition |= AV_DISPOSITION_FORCED;
1501 if (track->default_duration)
1502 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
1503 track->default_duration, 1000000000, 30000);
1505 if (!st->codec->extradata) {
1507 st->codec->extradata = extradata;
1508 st->codec->extradata_size = extradata_size;
1509 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1510 st->codec->extradata = av_mallocz(track->codec_priv.size +
1511 FF_INPUT_BUFFER_PADDING_SIZE);
1512 if(st->codec->extradata == NULL)
1513 return AVERROR(ENOMEM);
1514 st->codec->extradata_size = track->codec_priv.size;
1515 memcpy(st->codec->extradata,
1516 track->codec_priv.data + extradata_offset,
1517 track->codec_priv.size);
1521 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1522 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1523 st->codec->codec_tag = track->video.fourcc;
1524 st->codec->width = track->video.pixel_width;
1525 st->codec->height = track->video.pixel_height;
1526 av_reduce(&st->sample_aspect_ratio.num,
1527 &st->sample_aspect_ratio.den,
1528 st->codec->height * track->video.display_width,
1529 st->codec-> width * track->video.display_height,
1531 if (st->codec->codec_id != CODEC_ID_H264)
1532 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1533 if (track->default_duration)
1534 st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX);
1535 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1536 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1537 st->codec->sample_rate = track->audio.out_samplerate;
1538 st->codec->channels = track->audio.channels;
1539 if (st->codec->codec_id != CODEC_ID_AAC)
1540 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1541 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1542 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1546 attachements = attachements_list->elem;
1547 for (j=0; j<attachements_list->nb_elem; j++) {
1548 if (!(attachements[j].filename && attachements[j].mime &&
1549 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1550 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1552 AVStream *st = av_new_stream(s, 0);
1555 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
1556 st->codec->codec_id = CODEC_ID_NONE;
1557 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1558 st->codec->extradata = av_malloc(attachements[j].bin.size);
1559 if(st->codec->extradata == NULL)
1561 st->codec->extradata_size = attachements[j].bin.size;
1562 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1564 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1565 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1566 strlen(ff_mkv_mime_tags[i].str))) {
1567 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1571 attachements[j].stream = st;
1575 chapters = chapters_list->elem;
1576 for (i=0; i<chapters_list->nb_elem; i++)
1577 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1578 && (max_start==0 || chapters[i].start > max_start)) {
1579 chapters[i].chapter =
1580 ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1581 chapters[i].start, chapters[i].end,
1583 av_dict_set(&chapters[i].chapter->metadata,
1584 "title", chapters[i].title, 0);
1585 max_start = chapters[i].start;
1588 matroska_convert_tags(s);
1594 * Put one packet in an application-supplied AVPacket struct.
1595 * Returns 0 on success or -1 on failure.
1597 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1600 if (matroska->num_packets > 0) {
1601 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1602 av_free(matroska->packets[0]);
1603 if (matroska->num_packets > 1) {
1604 memmove(&matroska->packets[0], &matroska->packets[1],
1605 (matroska->num_packets - 1) * sizeof(AVPacket *));
1607 av_realloc(matroska->packets, (matroska->num_packets - 1) *
1608 sizeof(AVPacket *));
1610 av_freep(&matroska->packets);
1612 matroska->num_packets--;
1620 * Free all packets in our internal queue.
1622 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1624 if (matroska->packets) {
1626 for (n = 0; n < matroska->num_packets; n++) {
1627 av_free_packet(matroska->packets[n]);
1628 av_free(matroska->packets[n]);
1630 av_freep(&matroska->packets);
1631 matroska->num_packets = 0;
1635 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1636 int size, int64_t pos, uint64_t cluster_time,
1637 uint64_t duration, int is_keyframe,
1638 int64_t cluster_pos)
1640 uint64_t timecode = AV_NOPTS_VALUE;
1641 MatroskaTrack *track;
1646 uint32_t *lace_size = NULL;
1647 int n, flags, laces = 0;
1650 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
1651 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1657 track = matroska_find_track_by_num(matroska, num);
1658 if (size <= 3 || !track || !track->stream) {
1659 av_log(matroska->ctx, AV_LOG_INFO,
1660 "Invalid stream %"PRIu64" or size %u\n", num, size);
1661 return AVERROR_INVALIDDATA;
1664 if (st->discard >= AVDISCARD_ALL)
1666 if (duration == AV_NOPTS_VALUE)
1667 duration = track->default_duration / matroska->time_scale;
1669 block_time = AV_RB16(data);
1673 if (is_keyframe == -1)
1674 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
1676 if (cluster_time != (uint64_t)-1
1677 && (block_time >= 0 || cluster_time >= -block_time)) {
1678 timecode = cluster_time + block_time;
1679 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
1680 && timecode < track->end_timecode)
1681 is_keyframe = 0; /* overlapping subtitles are not key frame */
1683 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
1684 track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
1687 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1688 if (!is_keyframe || timecode < matroska->skip_to_timecode)
1690 matroska->skip_to_keyframe = 0;
1693 switch ((flags & 0x06) >> 1) {
1694 case 0x0: /* no lacing */
1696 lace_size = av_mallocz(sizeof(int));
1697 lace_size[0] = size;
1700 case 0x1: /* Xiph lacing */
1701 case 0x2: /* fixed-size lacing */
1702 case 0x3: /* EBML lacing */
1703 assert(size>0); // size <=3 is checked before size-=3 above
1704 laces = (*data) + 1;
1707 lace_size = av_mallocz(laces * sizeof(int));
1709 switch ((flags & 0x06) >> 1) {
1710 case 0x1: /* Xiph lacing */ {
1713 for (n = 0; res == 0 && n < laces - 1; n++) {
1720 lace_size[n] += temp;
1726 total += lace_size[n];
1728 lace_size[n] = size - total;
1732 case 0x2: /* fixed-size lacing */
1733 for (n = 0; n < laces; n++)
1734 lace_size[n] = size / laces;
1737 case 0x3: /* EBML lacing */ {
1739 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1741 av_log(matroska->ctx, AV_LOG_INFO,
1742 "EBML block data error\n");
1747 total = lace_size[0] = num;
1748 for (n = 1; res == 0 && n < laces - 1; n++) {
1751 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1753 av_log(matroska->ctx, AV_LOG_INFO,
1754 "EBML block data error\n");
1759 lace_size[n] = lace_size[n - 1] + snum;
1760 total += lace_size[n];
1762 lace_size[n] = size - total;
1770 for (n = 0; n < laces; n++) {
1771 if ((st->codec->codec_id == CODEC_ID_RA_288 ||
1772 st->codec->codec_id == CODEC_ID_COOK ||
1773 st->codec->codec_id == CODEC_ID_SIPR ||
1774 st->codec->codec_id == CODEC_ID_ATRAC3) &&
1775 st->codec->block_align && track->audio.sub_packet_size) {
1776 int a = st->codec->block_align;
1777 int sps = track->audio.sub_packet_size;
1778 int cfs = track->audio.coded_framesize;
1779 int h = track->audio.sub_packet_h;
1780 int y = track->audio.sub_packet_cnt;
1781 int w = track->audio.frame_size;
1784 if (!track->audio.pkt_cnt) {
1785 if (track->audio.sub_packet_cnt == 0)
1786 track->audio.buf_timecode = timecode;
1787 if (st->codec->codec_id == CODEC_ID_RA_288)
1788 for (x=0; x<h/2; x++)
1789 memcpy(track->audio.buf+x*2*w+y*cfs,
1791 else if (st->codec->codec_id == CODEC_ID_SIPR)
1792 memcpy(track->audio.buf + y*w, data, w);
1794 for (x=0; x<w/sps; x++)
1795 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1797 if (++track->audio.sub_packet_cnt >= h) {
1798 if (st->codec->codec_id == CODEC_ID_SIPR)
1799 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
1800 track->audio.sub_packet_cnt = 0;
1801 track->audio.pkt_cnt = h*w / a;
1804 while (track->audio.pkt_cnt) {
1805 pkt = av_mallocz(sizeof(AVPacket));
1806 av_new_packet(pkt, a);
1807 memcpy(pkt->data, track->audio.buf
1808 + a * (h*w / a - track->audio.pkt_cnt--), a);
1809 pkt->pts = track->audio.buf_timecode;
1810 track->audio.buf_timecode = AV_NOPTS_VALUE;
1812 pkt->stream_index = st->index;
1813 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1816 MatroskaTrackEncoding *encodings = track->encodings.elem;
1817 int offset = 0, pkt_size = lace_size[n];
1818 uint8_t *pkt_data = data;
1820 if (pkt_size > size) {
1821 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
1825 if (encodings && encodings->scope & 1) {
1826 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1831 pkt = av_mallocz(sizeof(AVPacket));
1832 /* XXX: prevent data copy... */
1833 if (av_new_packet(pkt, pkt_size+offset) < 0) {
1835 res = AVERROR(ENOMEM);
1839 memcpy (pkt->data, encodings->compression.settings.data, offset);
1840 memcpy (pkt->data+offset, pkt_data, pkt_size);
1842 if (pkt_data != data)
1846 pkt->flags = is_keyframe;
1847 pkt->stream_index = st->index;
1849 if (track->ms_compat)
1850 pkt->dts = timecode;
1852 pkt->pts = timecode;
1854 if (st->codec->codec_id == CODEC_ID_TEXT)
1855 pkt->convergence_duration = duration;
1856 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
1857 pkt->duration = duration;
1859 if (st->codec->codec_id == CODEC_ID_SSA)
1860 matroska_fix_ass_packet(matroska, pkt, duration);
1862 if (matroska->prev_pkt &&
1863 timecode != AV_NOPTS_VALUE &&
1864 matroska->prev_pkt->pts == timecode &&
1865 matroska->prev_pkt->stream_index == st->index &&
1866 st->codec->codec_id == CODEC_ID_SSA)
1867 matroska_merge_packets(matroska->prev_pkt, pkt);
1869 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1870 matroska->prev_pkt = pkt;
1874 if (timecode != AV_NOPTS_VALUE)
1875 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
1876 data += lace_size[n];
1877 size -= lace_size[n];
1885 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
1887 MatroskaCluster cluster = { 0 };
1888 EbmlList *blocks_list;
1889 MatroskaBlock *blocks;
1891 int64_t pos = avio_tell(matroska->ctx->pb);
1892 matroska->prev_pkt = NULL;
1893 if (matroska->current_id)
1894 pos -= 4; /* sizeof the ID which was already read */
1895 res = ebml_parse(matroska, matroska_clusters, &cluster);
1896 blocks_list = &cluster.blocks;
1897 blocks = blocks_list->elem;
1898 for (i=0; i<blocks_list->nb_elem && !res; i++)
1899 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
1900 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
1901 if (!blocks[i].non_simple)
1902 blocks[i].duration = AV_NOPTS_VALUE;
1903 res=matroska_parse_block(matroska,
1904 blocks[i].bin.data, blocks[i].bin.size,
1905 blocks[i].bin.pos, cluster.timecode,
1906 blocks[i].duration, is_keyframe,
1909 ebml_free(matroska_cluster, &cluster);
1910 if (res < 0) matroska->done = 1;
1914 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
1916 MatroskaDemuxContext *matroska = s->priv_data;
1919 while (!ret && matroska_deliver_packet(matroska, pkt)) {
1922 ret = matroska_parse_cluster(matroska);
1928 static int matroska_read_seek(AVFormatContext *s, int stream_index,
1929 int64_t timestamp, int flags)
1931 MatroskaDemuxContext *matroska = s->priv_data;
1932 MatroskaTrack *tracks = matroska->tracks.elem;
1933 AVStream *st = s->streams[stream_index];
1934 int i, index, index_sub, index_min;
1936 /* Parse the CUES now since we need the index data to seek. */
1937 if (matroska->cues_parsing_deferred) {
1938 matroska_parse_cues(matroska);
1939 matroska->cues_parsing_deferred = 0;
1942 if (!st->nb_index_entries)
1944 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
1946 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1947 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
1948 matroska->current_id = 0;
1949 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1950 matroska_clear_queue(matroska);
1951 if (matroska_parse_cluster(matroska) < 0)
1956 matroska_clear_queue(matroska);
1961 for (i=0; i < matroska->tracks.nb_elem; i++) {
1962 tracks[i].audio.pkt_cnt = 0;
1963 tracks[i].audio.sub_packet_cnt = 0;
1964 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
1965 tracks[i].end_timecode = 0;
1966 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
1967 && !tracks[i].stream->discard != AVDISCARD_ALL) {
1968 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
1970 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
1971 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
1972 index_min = index_sub;
1976 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
1977 matroska->current_id = 0;
1978 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
1979 matroska->skip_to_timecode = st->index_entries[index].timestamp;
1981 av_update_cur_dts(s, st, st->index_entries[index].timestamp);
1985 static int matroska_read_close(AVFormatContext *s)
1987 MatroskaDemuxContext *matroska = s->priv_data;
1988 MatroskaTrack *tracks = matroska->tracks.elem;
1991 matroska_clear_queue(matroska);
1993 for (n=0; n < matroska->tracks.nb_elem; n++)
1994 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
1995 av_free(tracks[n].audio.buf);
1996 ebml_free(matroska_segment, matroska);
2001 AVInputFormat ff_matroska_demuxer = {
2003 NULL_IF_CONFIG_SMALL("Matroska/WebM file format"),
2004 sizeof(MatroskaDemuxContext),
2006 matroska_read_header,
2007 matroska_read_packet,
2008 matroska_read_close,