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;
247 } MatroskaDemuxContext;
261 static EbmlSyntax ebml_header[] = {
262 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
263 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
264 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
265 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
266 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
267 { EBML_ID_EBMLVERSION, EBML_NONE },
268 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
272 static EbmlSyntax ebml_syntax[] = {
273 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
277 static EbmlSyntax matroska_info[] = {
278 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
279 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
280 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
281 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
282 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
283 { MATROSKA_ID_DATEUTC, EBML_NONE },
284 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
288 static EbmlSyntax matroska_track_video[] = {
289 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
290 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
291 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
292 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
293 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
294 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) },
295 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
296 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
297 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
298 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
299 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
300 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
301 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE },
302 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
306 static EbmlSyntax matroska_track_audio[] = {
307 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
308 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
309 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
310 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
314 static EbmlSyntax matroska_track_encoding_compression[] = {
315 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
316 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
320 static EbmlSyntax matroska_track_encoding[] = {
321 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
322 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
323 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
324 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
328 static EbmlSyntax matroska_track_encodings[] = {
329 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
333 static EbmlSyntax matroska_track[] = {
334 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
335 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
336 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
337 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
338 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
339 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
340 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
341 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
342 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
343 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
344 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack,flag_forced), {.u=0} },
345 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
346 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
347 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
348 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
349 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
350 { MATROSKA_ID_CODECNAME, EBML_NONE },
351 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
352 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
353 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
354 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
355 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
356 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
360 static EbmlSyntax matroska_tracks[] = {
361 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
365 static EbmlSyntax matroska_attachment[] = {
366 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
367 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
368 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
369 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
370 { MATROSKA_ID_FILEDESC, EBML_NONE },
374 static EbmlSyntax matroska_attachments[] = {
375 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
379 static EbmlSyntax matroska_chapter_display[] = {
380 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
381 { MATROSKA_ID_CHAPLANG, EBML_NONE },
385 static EbmlSyntax matroska_chapter_entry[] = {
386 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
387 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
388 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
389 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
390 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
391 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
392 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
393 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
397 static EbmlSyntax matroska_chapter[] = {
398 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
399 { MATROSKA_ID_EDITIONUID, EBML_NONE },
400 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
401 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
402 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
406 static EbmlSyntax matroska_chapters[] = {
407 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
411 static EbmlSyntax matroska_index_pos[] = {
412 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
413 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
414 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
418 static EbmlSyntax matroska_index_entry[] = {
419 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
420 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
424 static EbmlSyntax matroska_index[] = {
425 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
429 static EbmlSyntax matroska_simpletag[] = {
430 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
431 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
432 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
433 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
434 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag,def) },
435 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
439 static EbmlSyntax matroska_tagtargets[] = {
440 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
441 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
442 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
443 { MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
444 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
448 static EbmlSyntax matroska_tag[] = {
449 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
450 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
454 static EbmlSyntax matroska_tags[] = {
455 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
459 static EbmlSyntax matroska_seekhead_entry[] = {
460 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
461 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
465 static EbmlSyntax matroska_seekhead[] = {
466 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
470 static EbmlSyntax matroska_segment[] = {
471 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
472 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
473 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
474 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
475 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
476 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
477 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
478 { MATROSKA_ID_CLUSTER, EBML_STOP },
482 static EbmlSyntax matroska_segments[] = {
483 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
487 static EbmlSyntax matroska_blockgroup[] = {
488 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
489 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
490 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
491 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
492 { 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
496 static EbmlSyntax matroska_cluster[] = {
497 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
498 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
499 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
500 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
501 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
505 static EbmlSyntax matroska_clusters[] = {
506 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
507 { MATROSKA_ID_INFO, EBML_NONE },
508 { MATROSKA_ID_CUES, EBML_NONE },
509 { MATROSKA_ID_TAGS, EBML_NONE },
510 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
514 static const char *matroska_doctypes[] = { "matroska", "webm" };
517 * Return: Whether we reached the end of a level in the hierarchy or not.
519 static int ebml_level_end(MatroskaDemuxContext *matroska)
521 AVIOContext *pb = matroska->ctx->pb;
522 int64_t pos = avio_tell(pb);
524 if (matroska->num_levels > 0) {
525 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
526 if (pos - level->start >= level->length || matroska->current_id) {
527 matroska->num_levels--;
535 * Read: an "EBML number", which is defined as a variable-length
536 * array of bytes. The first byte indicates the length by giving a
537 * number of 0-bits followed by a one. The position of the first
538 * "one" bit inside the first byte indicates the length of this
540 * Returns: number of bytes read, < 0 on error
542 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
543 int max_size, uint64_t *number)
548 /* The first byte tells us the length in bytes - avio_r8() can normally
549 * return 0, but since that's not a valid first ebmlID byte, we can
550 * use it safely here to catch EOS. */
551 if (!(total = avio_r8(pb))) {
552 /* we might encounter EOS here */
553 if (!pb->eof_reached) {
554 int64_t pos = avio_tell(pb);
555 av_log(matroska->ctx, AV_LOG_ERROR,
556 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
559 return AVERROR(EIO); /* EOS or actual I/O error */
562 /* get the length of the EBML number */
563 read = 8 - ff_log2_tab[total];
564 if (read > max_size) {
565 int64_t pos = avio_tell(pb) - 1;
566 av_log(matroska->ctx, AV_LOG_ERROR,
567 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
568 (uint8_t) total, pos, pos);
569 return AVERROR_INVALIDDATA;
572 /* read out length */
573 total ^= 1 << ff_log2_tab[total];
575 total = (total << 8) | avio_r8(pb);
583 * Read a EBML length value.
584 * This needs special handling for the "unknown length" case which has multiple
587 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
590 int res = ebml_read_num(matroska, pb, 8, number);
591 if (res > 0 && *number + 1 == 1ULL << (7 * res))
592 *number = 0xffffffffffffffULL;
597 * Read the next element as an unsigned int.
598 * 0 is success, < 0 is failure.
600 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
605 return AVERROR_INVALIDDATA;
607 /* big-endian ordering; build up number */
610 *num = (*num << 8) | avio_r8(pb);
616 * Read the next element as a float.
617 * 0 is success, < 0 is failure.
619 static int ebml_read_float(AVIOContext *pb, int size, double *num)
623 } else if (size == 4) {
624 *num= av_int2flt(avio_rb32(pb));
626 *num= av_int2dbl(avio_rb64(pb));
628 return AVERROR_INVALIDDATA;
634 * Read the next element as an ASCII string.
635 * 0 is success, < 0 is failure.
637 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
640 /* EBML strings are usually not 0-terminated, so we allocate one
641 * byte more, read the string and NULL-terminate it ourselves. */
642 if (!(*str = av_malloc(size + 1)))
643 return AVERROR(ENOMEM);
644 if (avio_read(pb, (uint8_t *) *str, size) != size) {
654 * Read the next element as binary data.
655 * 0 is success, < 0 is failure.
657 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
660 if (!(bin->data = av_malloc(length)))
661 return AVERROR(ENOMEM);
664 bin->pos = avio_tell(pb);
665 if (avio_read(pb, bin->data, length) != length) {
666 av_freep(&bin->data);
674 * Read the next element, but only the header. The contents
675 * are supposed to be sub-elements which can be read separately.
676 * 0 is success, < 0 is failure.
678 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
680 AVIOContext *pb = matroska->ctx->pb;
681 MatroskaLevel *level;
683 if (matroska->num_levels >= EBML_MAX_DEPTH) {
684 av_log(matroska->ctx, AV_LOG_ERROR,
685 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
686 return AVERROR(ENOSYS);
689 level = &matroska->levels[matroska->num_levels++];
690 level->start = avio_tell(pb);
691 level->length = length;
697 * Read signed/unsigned "EBML" numbers.
698 * Return: number of bytes processed, < 0 on error
700 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
701 uint8_t *data, uint32_t size, uint64_t *num)
704 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
705 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
709 * Same as above, but signed.
711 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
712 uint8_t *data, uint32_t size, int64_t *num)
717 /* read as unsigned number first */
718 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
721 /* make signed (weird way) */
722 *num = unum - ((1LL << (7*res - 1)) - 1);
727 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
728 EbmlSyntax *syntax, void *data);
730 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
731 uint32_t id, void *data)
734 for (i=0; syntax[i].id; i++)
735 if (id == syntax[i].id)
737 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
738 matroska->num_levels > 0 &&
739 matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
740 return 0; // we reached the end of an unknown size cluster
741 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32)
742 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
743 return ebml_parse_elem(matroska, &syntax[i], data);
746 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
749 if (!matroska->current_id) {
751 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
754 matroska->current_id = id | 1 << 7*res;
756 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
759 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
764 for (i=0; syntax[i].id; i++)
765 switch (syntax[i].type) {
767 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
770 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
774 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
778 while (!res && !ebml_level_end(matroska))
779 res = ebml_parse(matroska, syntax, data);
784 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
785 EbmlSyntax *syntax, void *data)
787 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
790 // max. 16 MB for strings
791 [EBML_STR] = 0x1000000,
792 [EBML_UTF8] = 0x1000000,
793 // max. 256 MB for binary data
794 [EBML_BIN] = 0x10000000,
795 // no limits for anything else
797 AVIOContext *pb = matroska->ctx->pb;
798 uint32_t id = syntax->id;
802 data = (char *)data + syntax->data_offset;
803 if (syntax->list_elem_size) {
804 EbmlList *list = data;
805 list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
806 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
807 memset(data, 0, syntax->list_elem_size);
811 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
812 matroska->current_id = 0;
813 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
815 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
816 av_log(matroska->ctx, AV_LOG_ERROR,
817 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
818 length, max_lengths[syntax->type], syntax->type);
819 return AVERROR_INVALIDDATA;
823 switch (syntax->type) {
824 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
825 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
827 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
828 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
829 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
831 if (id == MATROSKA_ID_SEGMENT)
832 matroska->segment_start = avio_tell(matroska->ctx->pb);
833 return ebml_parse_nest(matroska, syntax->def.n, data);
834 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
835 case EBML_STOP: return 1;
836 default: return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
838 if (res == AVERROR_INVALIDDATA)
839 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
840 else if (res == AVERROR(EIO))
841 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
845 static void ebml_free(EbmlSyntax *syntax, void *data)
848 for (i=0; syntax[i].id; i++) {
849 void *data_off = (char *)data + syntax[i].data_offset;
850 switch (syntax[i].type) {
852 case EBML_UTF8: av_freep(data_off); break;
853 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
855 if (syntax[i].list_elem_size) {
856 EbmlList *list = data_off;
857 char *ptr = list->elem;
858 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
859 ebml_free(syntax[i].def.n, ptr);
862 ebml_free(syntax[i].def.n, data_off);
872 static int matroska_probe(AVProbeData *p)
875 int len_mask = 0x80, size = 1, n = 1, i;
878 if (AV_RB32(p->buf) != EBML_ID_HEADER)
881 /* length of header */
883 while (size <= 8 && !(total & len_mask)) {
889 total &= (len_mask - 1);
891 total = (total << 8) | p->buf[4 + n++];
893 /* Does the probe data contain the whole header? */
894 if (p->buf_size < 4 + size + total)
897 /* The header should contain a known document type. For now,
898 * we don't parse the whole header but simply check for the
899 * availability of that array of characters inside the header.
900 * Not fully fool-proof, but good enough. */
901 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
902 int probelen = strlen(matroska_doctypes[i]);
903 for (n = 4+size; n <= 4+size+total-probelen; n++)
904 if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
905 return AVPROBE_SCORE_MAX;
908 // probably valid EBML header but no recognized doctype
909 return AVPROBE_SCORE_MAX/2;
912 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
915 MatroskaTrack *tracks = matroska->tracks.elem;
918 for (i=0; i < matroska->tracks.nb_elem; i++)
919 if (tracks[i].num == num)
922 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
926 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
927 MatroskaTrack *track)
929 MatroskaTrackEncoding *encodings = track->encodings.elem;
930 uint8_t* data = *buf;
931 int isize = *buf_size;
932 uint8_t* pkt_data = NULL;
933 int pkt_size = isize;
937 if (pkt_size >= 10000000)
940 switch (encodings[0].compression.algo) {
941 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
942 return encodings[0].compression.settings.size;
943 case MATROSKA_TRACK_ENCODING_COMP_LZO:
945 olen = pkt_size *= 3;
946 pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
947 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
948 } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
954 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
955 z_stream zstream = {0};
956 if (inflateInit(&zstream) != Z_OK)
958 zstream.next_in = data;
959 zstream.avail_in = isize;
962 pkt_data = av_realloc(pkt_data, pkt_size);
963 zstream.avail_out = pkt_size - zstream.total_out;
964 zstream.next_out = pkt_data + zstream.total_out;
965 result = inflate(&zstream, Z_NO_FLUSH);
966 } while (result==Z_OK && pkt_size<10000000);
967 pkt_size = zstream.total_out;
968 inflateEnd(&zstream);
969 if (result != Z_STREAM_END)
975 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
976 bz_stream bzstream = {0};
977 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
979 bzstream.next_in = data;
980 bzstream.avail_in = isize;
983 pkt_data = av_realloc(pkt_data, pkt_size);
984 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
985 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
986 result = BZ2_bzDecompress(&bzstream);
987 } while (result==BZ_OK && pkt_size<10000000);
988 pkt_size = bzstream.total_out_lo32;
989 BZ2_bzDecompressEnd(&bzstream);
990 if (result != BZ_STREAM_END)
1000 *buf_size = pkt_size;
1007 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1008 AVPacket *pkt, uint64_t display_duration)
1010 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
1011 for (; *ptr!=',' && ptr<end-1; ptr++);
1014 for (; *ptr!=',' && ptr<end-1; ptr++);
1016 int64_t end_pts = pkt->pts + display_duration;
1017 int sc = matroska->time_scale * pkt->pts / 10000000;
1018 int ec = matroska->time_scale * end_pts / 10000000;
1019 int sh, sm, ss, eh, em, es, len;
1020 sh = sc/360000; sc -= 360000*sh;
1021 sm = sc/ 6000; sc -= 6000*sm;
1022 ss = sc/ 100; sc -= 100*ss;
1023 eh = ec/360000; ec -= 360000*eh;
1024 em = ec/ 6000; ec -= 6000*em;
1025 es = ec/ 100; ec -= 100*es;
1027 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1028 if (!(line = av_malloc(len)))
1030 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1031 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1034 pkt->size = strlen(line);
1038 static void matroska_merge_packets(AVPacket *out, AVPacket *in)
1040 out->data = av_realloc(out->data, out->size+in->size);
1041 memcpy(out->data+out->size, in->data, in->size);
1042 out->size += in->size;
1043 av_destruct_packet(in);
1047 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1048 AVDictionary **metadata, char *prefix)
1050 MatroskaTag *tags = list->elem;
1054 for (i=0; i < list->nb_elem; i++) {
1055 const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1057 if (!tags[i].name) {
1058 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1061 if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1062 else av_strlcpy(key, tags[i].name, sizeof(key));
1063 if (tags[i].def || !lang) {
1064 av_dict_set(metadata, key, tags[i].string, 0);
1065 if (tags[i].sub.nb_elem)
1066 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1069 av_strlcat(key, "-", sizeof(key));
1070 av_strlcat(key, lang, sizeof(key));
1071 av_dict_set(metadata, key, tags[i].string, 0);
1072 if (tags[i].sub.nb_elem)
1073 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1076 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1079 static void matroska_convert_tags(AVFormatContext *s)
1081 MatroskaDemuxContext *matroska = s->priv_data;
1082 MatroskaTags *tags = matroska->tags.elem;
1085 for (i=0; i < matroska->tags.nb_elem; i++) {
1086 if (tags[i].target.attachuid) {
1087 MatroskaAttachement *attachment = matroska->attachments.elem;
1088 for (j=0; j<matroska->attachments.nb_elem; j++)
1089 if (attachment[j].uid == tags[i].target.attachuid
1090 && attachment[j].stream)
1091 matroska_convert_tag(s, &tags[i].tag,
1092 &attachment[j].stream->metadata, NULL);
1093 } else if (tags[i].target.chapteruid) {
1094 MatroskaChapter *chapter = matroska->chapters.elem;
1095 for (j=0; j<matroska->chapters.nb_elem; j++)
1096 if (chapter[j].uid == tags[i].target.chapteruid
1097 && chapter[j].chapter)
1098 matroska_convert_tag(s, &tags[i].tag,
1099 &chapter[j].chapter->metadata, NULL);
1100 } else if (tags[i].target.trackuid) {
1101 MatroskaTrack *track = matroska->tracks.elem;
1102 for (j=0; j<matroska->tracks.nb_elem; j++)
1103 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1104 matroska_convert_tag(s, &tags[i].tag,
1105 &track[j].stream->metadata, NULL);
1107 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1108 tags[i].target.type);
1113 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1115 EbmlList *seekhead_list = &matroska->seekhead;
1116 MatroskaSeekhead *seekhead = seekhead_list->elem;
1117 uint32_t level_up = matroska->level_up;
1118 int64_t before_pos = avio_tell(matroska->ctx->pb);
1119 uint32_t saved_id = matroska->current_id;
1120 MatroskaLevel level;
1123 // we should not do any seeking in the streaming case
1124 if (!matroska->ctx->pb->seekable ||
1125 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1128 for (i=0; i<seekhead_list->nb_elem; i++) {
1129 int64_t offset = seekhead[i].pos + matroska->segment_start;
1131 if (seekhead[i].pos <= before_pos
1132 || seekhead[i].id == MATROSKA_ID_SEEKHEAD
1133 || seekhead[i].id == MATROSKA_ID_CLUSTER)
1137 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) != offset)
1140 /* We don't want to lose our seekhead level, so we add
1141 * a dummy. This is a crude hack. */
1142 if (matroska->num_levels == EBML_MAX_DEPTH) {
1143 av_log(matroska->ctx, AV_LOG_INFO,
1144 "Max EBML element depth (%d) reached, "
1145 "cannot parse further.\n", EBML_MAX_DEPTH);
1150 level.length = (uint64_t)-1;
1151 matroska->levels[matroska->num_levels] = level;
1152 matroska->num_levels++;
1153 matroska->current_id = 0;
1155 ebml_parse(matroska, matroska_segment, matroska);
1157 /* remove dummy level */
1158 while (matroska->num_levels) {
1159 uint64_t length = matroska->levels[--matroska->num_levels].length;
1160 if (length == (uint64_t)-1)
1166 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1167 matroska->level_up = level_up;
1168 matroska->current_id = saved_id;
1171 static int matroska_aac_profile(char *codec_id)
1173 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1176 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1177 if (strstr(codec_id, aac_profiles[profile]))
1182 static int matroska_aac_sri(int samplerate)
1186 for (sri=0; sri<FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++)
1187 if (ff_mpeg4audio_sample_rates[sri] == samplerate)
1192 static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
1194 MatroskaDemuxContext *matroska = s->priv_data;
1195 EbmlList *attachements_list = &matroska->attachments;
1196 MatroskaAttachement *attachements;
1197 EbmlList *chapters_list = &matroska->chapters;
1198 MatroskaChapter *chapters;
1199 MatroskaTrack *tracks;
1200 EbmlList *index_list;
1201 MatroskaIndex *index;
1202 int index_scale = 1;
1203 uint64_t max_start = 0;
1210 /* First read the EBML header. */
1211 if (ebml_parse(matroska, ebml_syntax, &ebml)
1212 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1213 || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) {
1214 av_log(matroska->ctx, AV_LOG_ERROR,
1215 "EBML header using unsupported features\n"
1216 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1217 ebml.version, ebml.doctype, ebml.doctype_version);
1218 ebml_free(ebml_syntax, &ebml);
1219 return AVERROR_PATCHWELCOME;
1221 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1222 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1224 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1225 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1227 ebml_free(ebml_syntax, &ebml);
1229 /* The next thing is a segment. */
1230 if ((res = ebml_parse(matroska, matroska_segments, matroska)) < 0)
1232 matroska_execute_seekhead(matroska);
1234 if (!matroska->time_scale)
1235 matroska->time_scale = 1000000;
1236 if (matroska->duration)
1237 matroska->ctx->duration = matroska->duration * matroska->time_scale
1238 * 1000 / AV_TIME_BASE;
1239 av_dict_set(&s->metadata, "title", matroska->title, 0);
1241 tracks = matroska->tracks.elem;
1242 for (i=0; i < matroska->tracks.nb_elem; i++) {
1243 MatroskaTrack *track = &tracks[i];
1244 enum CodecID codec_id = CODEC_ID_NONE;
1245 EbmlList *encodings_list = &tracks->encodings;
1246 MatroskaTrackEncoding *encodings = encodings_list->elem;
1247 uint8_t *extradata = NULL;
1248 int extradata_size = 0;
1249 int extradata_offset = 0;
1252 /* Apply some sanity checks. */
1253 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1254 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1255 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1256 av_log(matroska->ctx, AV_LOG_INFO,
1257 "Unknown or unsupported track type %"PRIu64"\n",
1261 if (track->codec_id == NULL)
1264 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1265 if (!track->default_duration)
1266 track->default_duration = 1000000000/track->video.frame_rate;
1267 if (!track->video.display_width)
1268 track->video.display_width = track->video.pixel_width;
1269 if (!track->video.display_height)
1270 track->video.display_height = track->video.pixel_height;
1271 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1272 if (!track->audio.out_samplerate)
1273 track->audio.out_samplerate = track->audio.samplerate;
1275 if (encodings_list->nb_elem > 1) {
1276 av_log(matroska->ctx, AV_LOG_ERROR,
1277 "Multiple combined encodings no supported");
1278 } else if (encodings_list->nb_elem == 1) {
1279 if (encodings[0].type ||
1280 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1282 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1285 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1287 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1288 encodings[0].scope = 0;
1289 av_log(matroska->ctx, AV_LOG_ERROR,
1290 "Unsupported encoding type");
1291 } else if (track->codec_priv.size && encodings[0].scope&2) {
1292 uint8_t *codec_priv = track->codec_priv.data;
1293 int offset = matroska_decode_buffer(&track->codec_priv.data,
1294 &track->codec_priv.size,
1297 track->codec_priv.data = NULL;
1298 track->codec_priv.size = 0;
1299 av_log(matroska->ctx, AV_LOG_ERROR,
1300 "Failed to decode codec private data\n");
1301 } else if (offset > 0) {
1302 track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1303 memcpy(track->codec_priv.data,
1304 encodings[0].compression.settings.data, offset);
1305 memcpy(track->codec_priv.data+offset, codec_priv,
1306 track->codec_priv.size);
1307 track->codec_priv.size += offset;
1309 if (codec_priv != track->codec_priv.data)
1310 av_free(codec_priv);
1314 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1315 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1316 strlen(ff_mkv_codec_tags[j].str))){
1317 codec_id= ff_mkv_codec_tags[j].id;
1322 st = track->stream = av_new_stream(s, 0);
1324 return AVERROR(ENOMEM);
1326 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1327 && track->codec_priv.size >= 40
1328 && track->codec_priv.data != NULL) {
1329 track->ms_compat = 1;
1330 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1331 codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc);
1332 extradata_offset = 40;
1333 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1334 && track->codec_priv.size >= 14
1335 && track->codec_priv.data != NULL) {
1337 ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
1338 AVIO_FLAG_READ, NULL, NULL, NULL, NULL);
1339 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1342 codec_id = st->codec->codec_id;
1343 extradata_offset = FFMIN(track->codec_priv.size, 18);
1344 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1345 && (track->codec_priv.size >= 86)
1346 && (track->codec_priv.data != NULL)) {
1347 track->video.fourcc = AV_RL32(track->codec_priv.data);
1348 codec_id=ff_codec_get_id(codec_movvideo_tags, track->video.fourcc);
1349 } else if (codec_id == CODEC_ID_PCM_S16BE) {
1350 switch (track->audio.bitdepth) {
1351 case 8: codec_id = CODEC_ID_PCM_U8; break;
1352 case 24: codec_id = CODEC_ID_PCM_S24BE; break;
1353 case 32: codec_id = CODEC_ID_PCM_S32BE; break;
1355 } else if (codec_id == CODEC_ID_PCM_S16LE) {
1356 switch (track->audio.bitdepth) {
1357 case 8: codec_id = CODEC_ID_PCM_U8; break;
1358 case 24: codec_id = CODEC_ID_PCM_S24LE; break;
1359 case 32: codec_id = CODEC_ID_PCM_S32LE; break;
1361 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1362 codec_id = CODEC_ID_PCM_F64LE;
1363 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1364 int profile = matroska_aac_profile(track->codec_id);
1365 int sri = matroska_aac_sri(track->audio.samplerate);
1366 extradata = av_malloc(5);
1367 if (extradata == NULL)
1368 return AVERROR(ENOMEM);
1369 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1370 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1371 if (strstr(track->codec_id, "SBR")) {
1372 sri = matroska_aac_sri(track->audio.out_samplerate);
1373 extradata[2] = 0x56;
1374 extradata[3] = 0xE5;
1375 extradata[4] = 0x80 | (sri<<3);
1379 } else if (codec_id == CODEC_ID_TTA) {
1380 extradata_size = 30;
1381 extradata = av_mallocz(extradata_size);
1382 if (extradata == NULL)
1383 return AVERROR(ENOMEM);
1384 ffio_init_context(&b, extradata, extradata_size, 1,
1385 NULL, NULL, NULL, NULL);
1386 avio_write(&b, "TTA1", 4);
1388 avio_wl16(&b, track->audio.channels);
1389 avio_wl16(&b, track->audio.bitdepth);
1390 avio_wl32(&b, track->audio.out_samplerate);
1391 avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1392 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1393 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1394 extradata_offset = 26;
1395 } else if (codec_id == CODEC_ID_RA_144) {
1396 track->audio.out_samplerate = 8000;
1397 track->audio.channels = 1;
1398 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1399 codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) {
1401 ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
1402 0, NULL, NULL, NULL, NULL);
1404 flavor = avio_rb16(&b);
1405 track->audio.coded_framesize = avio_rb32(&b);
1407 track->audio.sub_packet_h = avio_rb16(&b);
1408 track->audio.frame_size = avio_rb16(&b);
1409 track->audio.sub_packet_size = avio_rb16(&b);
1410 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1411 if (codec_id == CODEC_ID_RA_288) {
1412 st->codec->block_align = track->audio.coded_framesize;
1413 track->codec_priv.size = 0;
1415 if (codec_id == CODEC_ID_SIPR && flavor < 4) {
1416 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1417 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1418 st->codec->bit_rate = sipr_bit_rate[flavor];
1420 st->codec->block_align = track->audio.sub_packet_size;
1421 extradata_offset = 78;
1424 track->codec_priv.size -= extradata_offset;
1426 if (codec_id == CODEC_ID_NONE)
1427 av_log(matroska->ctx, AV_LOG_INFO,
1428 "Unknown/unsupported CodecID %s.\n", track->codec_id);
1430 if (track->time_scale < 0.01)
1431 track->time_scale = 1.0;
1432 av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1434 st->codec->codec_id = codec_id;
1436 if (strcmp(track->language, "und"))
1437 av_dict_set(&st->metadata, "language", track->language, 0);
1438 av_dict_set(&st->metadata, "title", track->name, 0);
1440 if (track->flag_default)
1441 st->disposition |= AV_DISPOSITION_DEFAULT;
1442 if (track->flag_forced)
1443 st->disposition |= AV_DISPOSITION_FORCED;
1445 if (track->default_duration)
1446 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
1447 track->default_duration, 1000000000, 30000);
1449 if (!st->codec->extradata) {
1451 st->codec->extradata = extradata;
1452 st->codec->extradata_size = extradata_size;
1453 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1454 st->codec->extradata = av_mallocz(track->codec_priv.size +
1455 FF_INPUT_BUFFER_PADDING_SIZE);
1456 if(st->codec->extradata == NULL)
1457 return AVERROR(ENOMEM);
1458 st->codec->extradata_size = track->codec_priv.size;
1459 memcpy(st->codec->extradata,
1460 track->codec_priv.data + extradata_offset,
1461 track->codec_priv.size);
1465 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1466 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1467 st->codec->codec_tag = track->video.fourcc;
1468 st->codec->width = track->video.pixel_width;
1469 st->codec->height = track->video.pixel_height;
1470 av_reduce(&st->sample_aspect_ratio.num,
1471 &st->sample_aspect_ratio.den,
1472 st->codec->height * track->video.display_width,
1473 st->codec-> width * track->video.display_height,
1475 if (st->codec->codec_id != CODEC_ID_H264)
1476 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1477 if (track->default_duration)
1478 st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX);
1479 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1480 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1481 st->codec->sample_rate = track->audio.out_samplerate;
1482 st->codec->channels = track->audio.channels;
1483 if (st->codec->codec_id != CODEC_ID_AAC)
1484 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1485 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1486 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1490 attachements = attachements_list->elem;
1491 for (j=0; j<attachements_list->nb_elem; j++) {
1492 if (!(attachements[j].filename && attachements[j].mime &&
1493 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1494 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1496 AVStream *st = av_new_stream(s, 0);
1499 av_dict_set(&st->metadata, "filename",attachements[j].filename, 0);
1500 st->codec->codec_id = CODEC_ID_NONE;
1501 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1502 st->codec->extradata = av_malloc(attachements[j].bin.size);
1503 if(st->codec->extradata == NULL)
1505 st->codec->extradata_size = attachements[j].bin.size;
1506 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1508 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1509 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1510 strlen(ff_mkv_mime_tags[i].str))) {
1511 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1515 attachements[j].stream = st;
1519 chapters = chapters_list->elem;
1520 for (i=0; i<chapters_list->nb_elem; i++)
1521 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
1522 && (max_start==0 || chapters[i].start > max_start)) {
1523 chapters[i].chapter =
1524 ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1525 chapters[i].start, chapters[i].end,
1527 av_dict_set(&chapters[i].chapter->metadata,
1528 "title", chapters[i].title, 0);
1529 max_start = chapters[i].start;
1532 index_list = &matroska->index;
1533 index = index_list->elem;
1534 if (index_list->nb_elem
1535 && index[0].time > 100000000000000/matroska->time_scale) {
1536 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1537 index_scale = matroska->time_scale;
1539 for (i=0; i<index_list->nb_elem; i++) {
1540 EbmlList *pos_list = &index[i].pos;
1541 MatroskaIndexPos *pos = pos_list->elem;
1542 for (j=0; j<pos_list->nb_elem; j++) {
1543 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1545 if (track && track->stream)
1546 av_add_index_entry(track->stream,
1547 pos[j].pos + matroska->segment_start,
1548 index[i].time/index_scale, 0, 0,
1553 matroska_convert_tags(s);
1559 * Put one packet in an application-supplied AVPacket struct.
1560 * Returns 0 on success or -1 on failure.
1562 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1565 if (matroska->num_packets > 0) {
1566 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1567 av_free(matroska->packets[0]);
1568 if (matroska->num_packets > 1) {
1569 memmove(&matroska->packets[0], &matroska->packets[1],
1570 (matroska->num_packets - 1) * sizeof(AVPacket *));
1572 av_realloc(matroska->packets, (matroska->num_packets - 1) *
1573 sizeof(AVPacket *));
1575 av_freep(&matroska->packets);
1577 matroska->num_packets--;
1585 * Free all packets in our internal queue.
1587 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1589 if (matroska->packets) {
1591 for (n = 0; n < matroska->num_packets; n++) {
1592 av_free_packet(matroska->packets[n]);
1593 av_free(matroska->packets[n]);
1595 av_freep(&matroska->packets);
1596 matroska->num_packets = 0;
1600 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1601 int size, int64_t pos, uint64_t cluster_time,
1602 uint64_t duration, int is_keyframe,
1603 int64_t cluster_pos)
1605 uint64_t timecode = AV_NOPTS_VALUE;
1606 MatroskaTrack *track;
1611 uint32_t *lace_size = NULL;
1612 int n, flags, laces = 0;
1615 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
1616 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1622 track = matroska_find_track_by_num(matroska, num);
1623 if (size <= 3 || !track || !track->stream) {
1624 av_log(matroska->ctx, AV_LOG_INFO,
1625 "Invalid stream %"PRIu64" or size %u\n", num, size);
1626 return AVERROR_INVALIDDATA;
1629 if (st->discard >= AVDISCARD_ALL)
1631 if (duration == AV_NOPTS_VALUE)
1632 duration = track->default_duration / matroska->time_scale;
1634 block_time = AV_RB16(data);
1638 if (is_keyframe == -1)
1639 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
1641 if (cluster_time != (uint64_t)-1
1642 && (block_time >= 0 || cluster_time >= -block_time)) {
1643 timecode = cluster_time + block_time;
1644 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
1645 && timecode < track->end_timecode)
1646 is_keyframe = 0; /* overlapping subtitles are not key frame */
1648 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
1649 track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
1652 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1653 if (!is_keyframe || timecode < matroska->skip_to_timecode)
1655 matroska->skip_to_keyframe = 0;
1658 switch ((flags & 0x06) >> 1) {
1659 case 0x0: /* no lacing */
1661 lace_size = av_mallocz(sizeof(int));
1662 lace_size[0] = size;
1665 case 0x1: /* Xiph lacing */
1666 case 0x2: /* fixed-size lacing */
1667 case 0x3: /* EBML lacing */
1668 assert(size>0); // size <=3 is checked before size-=3 above
1669 laces = (*data) + 1;
1672 lace_size = av_mallocz(laces * sizeof(int));
1674 switch ((flags & 0x06) >> 1) {
1675 case 0x1: /* Xiph lacing */ {
1678 for (n = 0; res == 0 && n < laces - 1; n++) {
1685 lace_size[n] += temp;
1691 total += lace_size[n];
1693 lace_size[n] = size - total;
1697 case 0x2: /* fixed-size lacing */
1698 for (n = 0; n < laces; n++)
1699 lace_size[n] = size / laces;
1702 case 0x3: /* EBML lacing */ {
1704 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1706 av_log(matroska->ctx, AV_LOG_INFO,
1707 "EBML block data error\n");
1712 total = lace_size[0] = num;
1713 for (n = 1; res == 0 && n < laces - 1; n++) {
1716 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1718 av_log(matroska->ctx, AV_LOG_INFO,
1719 "EBML block data error\n");
1724 lace_size[n] = lace_size[n - 1] + snum;
1725 total += lace_size[n];
1727 lace_size[n] = size - total;
1735 for (n = 0; n < laces; n++) {
1736 if ((st->codec->codec_id == CODEC_ID_RA_288 ||
1737 st->codec->codec_id == CODEC_ID_COOK ||
1738 st->codec->codec_id == CODEC_ID_SIPR ||
1739 st->codec->codec_id == CODEC_ID_ATRAC3) &&
1740 st->codec->block_align && track->audio.sub_packet_size) {
1741 int a = st->codec->block_align;
1742 int sps = track->audio.sub_packet_size;
1743 int cfs = track->audio.coded_framesize;
1744 int h = track->audio.sub_packet_h;
1745 int y = track->audio.sub_packet_cnt;
1746 int w = track->audio.frame_size;
1749 if (!track->audio.pkt_cnt) {
1750 if (track->audio.sub_packet_cnt == 0)
1751 track->audio.buf_timecode = timecode;
1752 if (st->codec->codec_id == CODEC_ID_RA_288)
1753 for (x=0; x<h/2; x++)
1754 memcpy(track->audio.buf+x*2*w+y*cfs,
1756 else if (st->codec->codec_id == CODEC_ID_SIPR)
1757 memcpy(track->audio.buf + y*w, data, w);
1759 for (x=0; x<w/sps; x++)
1760 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1762 if (++track->audio.sub_packet_cnt >= h) {
1763 if (st->codec->codec_id == CODEC_ID_SIPR)
1764 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
1765 track->audio.sub_packet_cnt = 0;
1766 track->audio.pkt_cnt = h*w / a;
1769 while (track->audio.pkt_cnt) {
1770 pkt = av_mallocz(sizeof(AVPacket));
1771 av_new_packet(pkt, a);
1772 memcpy(pkt->data, track->audio.buf
1773 + a * (h*w / a - track->audio.pkt_cnt--), a);
1774 pkt->pts = track->audio.buf_timecode;
1775 track->audio.buf_timecode = AV_NOPTS_VALUE;
1777 pkt->stream_index = st->index;
1778 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1781 MatroskaTrackEncoding *encodings = track->encodings.elem;
1782 int offset = 0, pkt_size = lace_size[n];
1783 uint8_t *pkt_data = data;
1785 if (pkt_size > size) {
1786 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
1790 if (encodings && encodings->scope & 1) {
1791 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1796 pkt = av_mallocz(sizeof(AVPacket));
1797 /* XXX: prevent data copy... */
1798 if (av_new_packet(pkt, pkt_size+offset) < 0) {
1800 res = AVERROR(ENOMEM);
1804 memcpy (pkt->data, encodings->compression.settings.data, offset);
1805 memcpy (pkt->data+offset, pkt_data, pkt_size);
1807 if (pkt_data != data)
1811 pkt->flags = is_keyframe;
1812 pkt->stream_index = st->index;
1814 if (track->ms_compat)
1815 pkt->dts = timecode;
1817 pkt->pts = timecode;
1819 if (st->codec->codec_id == CODEC_ID_TEXT)
1820 pkt->convergence_duration = duration;
1821 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
1822 pkt->duration = duration;
1824 if (st->codec->codec_id == CODEC_ID_SSA)
1825 matroska_fix_ass_packet(matroska, pkt, duration);
1827 if (matroska->prev_pkt &&
1828 timecode != AV_NOPTS_VALUE &&
1829 matroska->prev_pkt->pts == timecode &&
1830 matroska->prev_pkt->stream_index == st->index &&
1831 st->codec->codec_id == CODEC_ID_SSA)
1832 matroska_merge_packets(matroska->prev_pkt, pkt);
1834 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1835 matroska->prev_pkt = pkt;
1839 if (timecode != AV_NOPTS_VALUE)
1840 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
1841 data += lace_size[n];
1842 size -= lace_size[n];
1850 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
1852 MatroskaCluster cluster = { 0 };
1853 EbmlList *blocks_list;
1854 MatroskaBlock *blocks;
1856 int64_t pos = avio_tell(matroska->ctx->pb);
1857 matroska->prev_pkt = NULL;
1858 if (matroska->current_id)
1859 pos -= 4; /* sizeof the ID which was already read */
1860 res = ebml_parse(matroska, matroska_clusters, &cluster);
1861 blocks_list = &cluster.blocks;
1862 blocks = blocks_list->elem;
1863 for (i=0; i<blocks_list->nb_elem && !res; i++)
1864 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
1865 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
1866 if (!blocks[i].non_simple)
1867 blocks[i].duration = AV_NOPTS_VALUE;
1868 res=matroska_parse_block(matroska,
1869 blocks[i].bin.data, blocks[i].bin.size,
1870 blocks[i].bin.pos, cluster.timecode,
1871 blocks[i].duration, is_keyframe,
1874 ebml_free(matroska_cluster, &cluster);
1875 if (res < 0) matroska->done = 1;
1879 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
1881 MatroskaDemuxContext *matroska = s->priv_data;
1884 while (!ret && matroska_deliver_packet(matroska, pkt)) {
1887 ret = matroska_parse_cluster(matroska);
1893 static int matroska_read_seek(AVFormatContext *s, int stream_index,
1894 int64_t timestamp, int flags)
1896 MatroskaDemuxContext *matroska = s->priv_data;
1897 MatroskaTrack *tracks = matroska->tracks.elem;
1898 AVStream *st = s->streams[stream_index];
1899 int i, index, index_sub, index_min;
1901 if (!st->nb_index_entries)
1903 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
1905 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1906 avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
1907 matroska->current_id = 0;
1908 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1909 matroska_clear_queue(matroska);
1910 if (matroska_parse_cluster(matroska) < 0)
1915 matroska_clear_queue(matroska);
1920 for (i=0; i < matroska->tracks.nb_elem; i++) {
1921 tracks[i].audio.pkt_cnt = 0;
1922 tracks[i].audio.sub_packet_cnt = 0;
1923 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
1924 tracks[i].end_timecode = 0;
1925 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
1926 && !tracks[i].stream->discard != AVDISCARD_ALL) {
1927 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
1929 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
1930 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
1931 index_min = index_sub;
1935 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
1936 matroska->current_id = 0;
1937 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
1938 matroska->skip_to_timecode = st->index_entries[index].timestamp;
1940 av_update_cur_dts(s, st, st->index_entries[index].timestamp);
1944 static int matroska_read_close(AVFormatContext *s)
1946 MatroskaDemuxContext *matroska = s->priv_data;
1947 MatroskaTrack *tracks = matroska->tracks.elem;
1950 matroska_clear_queue(matroska);
1952 for (n=0; n < matroska->tracks.nb_elem; n++)
1953 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
1954 av_free(tracks[n].audio.buf);
1955 ebml_free(matroska_segment, matroska);
1960 AVInputFormat ff_matroska_demuxer = {
1962 NULL_IF_CONFIG_SMALL("Matroska/WebM file format"),
1963 sizeof(MatroskaDemuxContext),
1965 matroska_read_header,
1966 matroska_read_packet,
1967 matroska_read_close,