2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The Libav Project
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Matroska file demuxer
25 * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * @see specs available on the Matroska project page: http://www.matroska.org/
42 #include "libavutil/avstring.h"
43 #include "libavutil/dict.h"
44 #include "libavutil/intfloat.h"
45 #include "libavutil/intreadwrite.h"
46 #include "libavutil/lzo.h"
47 #include "libavutil/mathematics.h"
49 #include "libavcodec/bytestream.h"
50 #include "libavcodec/mpeg4audio.h"
53 #include "avio_internal.h"
57 /* For ff_codec_get_id(). */
74 typedef const struct EbmlSyntax {
83 const struct EbmlSyntax *n;
103 uint64_t doctype_version;
109 } MatroskaTrackCompression;
114 MatroskaTrackCompression compression;
115 } MatroskaTrackEncoding;
119 uint64_t display_width;
120 uint64_t display_height;
121 uint64_t pixel_width;
122 uint64_t pixel_height;
124 } MatroskaTrackVideo;
128 double out_samplerate;
132 /* real audio header (extracted from extradata) */
139 uint64_t buf_timecode;
141 } MatroskaTrackAudio;
152 uint64_t default_duration;
153 uint64_t flag_default;
154 uint64_t flag_forced;
155 MatroskaTrackVideo video;
156 MatroskaTrackAudio audio;
158 uint64_t codec_delay;
161 int64_t end_timecode;
172 } MatroskaAttachment;
210 MatroskaTagTarget target;
230 AVFormatContext *ctx;
234 MatroskaLevel levels[EBML_MAX_DEPTH];
242 EbmlList attachments;
248 /* byte position of the segment inside the stream */
249 int64_t segment_start;
251 /* the packet queue */
258 /* What to skip before effectively reading a packet. */
259 int skip_to_keyframe;
260 uint64_t skip_to_timecode;
262 /* File has a CUES element, but we defer parsing until it is needed. */
263 int cues_parsing_deferred;
265 int current_cluster_num_blocks;
266 int64_t current_cluster_pos;
267 MatroskaCluster current_cluster;
269 /* File has SSA subtitles which prevent incremental cluster parsing. */
271 } MatroskaDemuxContext;
280 static EbmlSyntax ebml_header[] = {
281 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
282 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
283 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
284 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
285 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
286 { EBML_ID_EBMLVERSION, EBML_NONE },
287 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
291 static EbmlSyntax ebml_syntax[] = {
292 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
296 static EbmlSyntax matroska_info[] = {
297 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
298 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
299 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
300 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
301 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
302 { MATROSKA_ID_DATEUTC, EBML_NONE },
303 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
307 static EbmlSyntax matroska_track_video[] = {
308 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
309 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width) },
310 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height) },
311 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
312 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
313 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, fourcc) },
314 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
315 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
316 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
317 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
318 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
319 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_NONE },
320 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE },
321 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
325 static EbmlSyntax matroska_track_audio[] = {
326 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
327 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
328 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
329 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
333 static EbmlSyntax matroska_track_encoding_compression[] = {
334 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
335 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
339 static EbmlSyntax matroska_track_encoding[] = {
340 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
341 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
342 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
343 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
347 static EbmlSyntax matroska_track_encodings[] = {
348 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
352 static EbmlSyntax matroska_track[] = {
353 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
354 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
355 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
356 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
357 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
358 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
359 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
360 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
361 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
362 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
363 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
364 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
365 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
366 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
367 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
368 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
369 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
370 { MATROSKA_ID_CODECNAME, EBML_NONE },
371 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
372 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
373 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
374 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
375 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
376 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
380 static EbmlSyntax matroska_tracks[] = {
381 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
385 static EbmlSyntax matroska_attachment[] = {
386 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
387 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
388 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
389 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
390 { MATROSKA_ID_FILEDESC, EBML_NONE },
394 static EbmlSyntax matroska_attachments[] = {
395 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
399 static EbmlSyntax matroska_chapter_display[] = {
400 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
401 { MATROSKA_ID_CHAPLANG, EBML_NONE },
405 static EbmlSyntax matroska_chapter_entry[] = {
406 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
407 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
408 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
409 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
410 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
411 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
412 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
413 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
417 static EbmlSyntax matroska_chapter[] = {
418 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
419 { MATROSKA_ID_EDITIONUID, EBML_NONE },
420 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
421 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
422 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
426 static EbmlSyntax matroska_chapters[] = {
427 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
431 static EbmlSyntax matroska_index_pos[] = {
432 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
433 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
434 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
438 static EbmlSyntax matroska_index_entry[] = {
439 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
440 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
444 static EbmlSyntax matroska_index[] = {
445 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
449 static EbmlSyntax matroska_simpletag[] = {
450 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
451 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
452 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
453 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
454 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
455 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
459 static EbmlSyntax matroska_tagtargets[] = {
460 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
461 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
462 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
463 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
464 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
468 static EbmlSyntax matroska_tag[] = {
469 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
470 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
474 static EbmlSyntax matroska_tags[] = {
475 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
479 static EbmlSyntax matroska_seekhead_entry[] = {
480 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
481 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
485 static EbmlSyntax matroska_seekhead[] = {
486 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
490 static EbmlSyntax matroska_segment[] = {
491 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, { .n = matroska_info } },
492 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, { .n = matroska_tracks } },
493 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, { .n = matroska_attachments } },
494 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, { .n = matroska_chapters } },
495 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, { .n = matroska_index } },
496 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, { .n = matroska_tags } },
497 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, { .n = matroska_seekhead } },
498 { MATROSKA_ID_CLUSTER, EBML_STOP },
502 static EbmlSyntax matroska_segments[] = {
503 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
507 static EbmlSyntax matroska_blockgroup[] = {
508 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
509 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
510 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration), { .u = AV_NOPTS_VALUE } },
511 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock, reference) },
512 { MATROSKA_ID_CODECSTATE, EBML_NONE },
513 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
517 static EbmlSyntax matroska_cluster[] = {
518 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
519 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
520 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
521 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
522 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
526 static EbmlSyntax matroska_clusters[] = {
527 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
528 { MATROSKA_ID_INFO, EBML_NONE },
529 { MATROSKA_ID_CUES, EBML_NONE },
530 { MATROSKA_ID_TAGS, EBML_NONE },
531 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
535 static EbmlSyntax matroska_cluster_incremental_parsing[] = {
536 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
537 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
538 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
539 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
540 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
541 { MATROSKA_ID_INFO, EBML_NONE },
542 { MATROSKA_ID_CUES, EBML_NONE },
543 { MATROSKA_ID_TAGS, EBML_NONE },
544 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
545 { MATROSKA_ID_CLUSTER, EBML_STOP },
549 static EbmlSyntax matroska_cluster_incremental[] = {
550 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
551 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
552 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
553 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
554 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
558 static EbmlSyntax matroska_clusters_incremental[] = {
559 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
560 { MATROSKA_ID_INFO, EBML_NONE },
561 { MATROSKA_ID_CUES, EBML_NONE },
562 { MATROSKA_ID_TAGS, EBML_NONE },
563 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
567 static const char *const matroska_doctypes[] = { "matroska", "webm" };
569 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
571 AVIOContext *pb = matroska->ctx->pb;
573 matroska->current_id = 0;
574 matroska->num_levels = 0;
576 /* seek to next position to resync from */
577 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
582 // try to find a toplevel element
583 while (!pb->eof_reached) {
584 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
585 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
586 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
587 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
588 matroska->current_id = id;
591 id = (id << 8) | avio_r8(pb);
600 * Return: Whether we reached the end of a level in the hierarchy or not.
602 static int ebml_level_end(MatroskaDemuxContext *matroska)
604 AVIOContext *pb = matroska->ctx->pb;
605 int64_t pos = avio_tell(pb);
607 if (matroska->num_levels > 0) {
608 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
609 if (pos - level->start >= level->length || matroska->current_id) {
610 matroska->num_levels--;
618 * Read: an "EBML number", which is defined as a variable-length
619 * array of bytes. The first byte indicates the length by giving a
620 * number of 0-bits followed by a one. The position of the first
621 * "one" bit inside the first byte indicates the length of this
623 * Returns: number of bytes read, < 0 on error
625 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
626 int max_size, uint64_t *number)
631 /* The first byte tells us the length in bytes - avio_r8() can normally
632 * return 0, but since that's not a valid first ebmlID byte, we can
633 * use it safely here to catch EOS. */
634 if (!(total = avio_r8(pb))) {
635 /* we might encounter EOS here */
636 if (!pb->eof_reached) {
637 int64_t pos = avio_tell(pb);
638 av_log(matroska->ctx, AV_LOG_ERROR,
639 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
641 return pb->error ? pb->error : AVERROR(EIO);
646 /* get the length of the EBML number */
647 read = 8 - ff_log2_tab[total];
648 if (read > max_size) {
649 int64_t pos = avio_tell(pb) - 1;
650 av_log(matroska->ctx, AV_LOG_ERROR,
651 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
652 (uint8_t) total, pos, pos);
653 return AVERROR_INVALIDDATA;
656 /* read out length */
657 total ^= 1 << ff_log2_tab[total];
659 total = (total << 8) | avio_r8(pb);
667 * Read a EBML length value.
668 * This needs special handling for the "unknown length" case which has multiple
671 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
674 int res = ebml_read_num(matroska, pb, 8, number);
675 if (res > 0 && *number + 1 == 1ULL << (7 * res))
676 *number = 0xffffffffffffffULL;
681 * Read the next element as an unsigned int.
682 * 0 is success, < 0 is failure.
684 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
689 return AVERROR_INVALIDDATA;
691 /* big-endian ordering; build up number */
694 *num = (*num << 8) | avio_r8(pb);
700 * Read the next element as a float.
701 * 0 is success, < 0 is failure.
703 static int ebml_read_float(AVIOContext *pb, int size, double *num)
708 *num = av_int2float(avio_rb32(pb));
710 *num = av_int2double(avio_rb64(pb));
712 return AVERROR_INVALIDDATA;
718 * Read the next element as an ASCII string.
719 * 0 is success, < 0 is failure.
721 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
725 /* EBML strings are usually not 0-terminated, so we allocate one
726 * byte more, read the string and NULL-terminate it ourselves. */
727 if (!(res = av_malloc(size + 1)))
728 return AVERROR(ENOMEM);
729 if (avio_read(pb, (uint8_t *) res, size) != size) {
741 * Read the next element as binary data.
742 * 0 is success, < 0 is failure.
744 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
747 if (!(bin->data = av_malloc(length + FF_INPUT_BUFFER_PADDING_SIZE)))
748 return AVERROR(ENOMEM);
750 memset(bin->data + length, 0, FF_INPUT_BUFFER_PADDING_SIZE);
753 bin->pos = avio_tell(pb);
754 if (avio_read(pb, bin->data, length) != length) {
755 av_freep(&bin->data);
763 * Read the next element, but only the header. The contents
764 * are supposed to be sub-elements which can be read separately.
765 * 0 is success, < 0 is failure.
767 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
769 AVIOContext *pb = matroska->ctx->pb;
770 MatroskaLevel *level;
772 if (matroska->num_levels >= EBML_MAX_DEPTH) {
773 av_log(matroska->ctx, AV_LOG_ERROR,
774 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
775 return AVERROR(ENOSYS);
778 level = &matroska->levels[matroska->num_levels++];
779 level->start = avio_tell(pb);
780 level->length = length;
786 * Read signed/unsigned "EBML" numbers.
787 * Return: number of bytes processed, < 0 on error
789 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
790 uint8_t *data, uint32_t size, uint64_t *num)
793 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
794 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
798 * Same as above, but signed.
800 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
801 uint8_t *data, uint32_t size, int64_t *num)
806 /* read as unsigned number first */
807 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
810 /* make signed (weird way) */
811 *num = unum - ((1LL << (7 * res - 1)) - 1);
816 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
817 EbmlSyntax *syntax, void *data);
819 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
820 uint32_t id, void *data)
823 for (i = 0; syntax[i].id; i++)
824 if (id == syntax[i].id)
826 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
827 matroska->num_levels > 0 &&
828 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
829 return 0; // we reached the end of an unknown size cluster
830 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
831 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%"PRIX32"\n", id);
832 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
833 return AVERROR_INVALIDDATA;
835 return ebml_parse_elem(matroska, &syntax[i], data);
838 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
841 if (!matroska->current_id) {
843 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
846 matroska->current_id = id | 1 << 7 * res;
848 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
851 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
856 for (i = 0; syntax[i].id; i++)
857 switch (syntax[i].type) {
859 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
862 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
866 // the default may be NULL
867 if (syntax[i].def.s) {
868 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
869 *dst = av_strdup(syntax[i].def.s);
871 return AVERROR(ENOMEM);
876 while (!res && !ebml_level_end(matroska))
877 res = ebml_parse(matroska, syntax, data);
882 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
883 EbmlSyntax *syntax, void *data)
885 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
888 // max. 16 MB for strings
889 [EBML_STR] = 0x1000000,
890 [EBML_UTF8] = 0x1000000,
891 // max. 256 MB for binary data
892 [EBML_BIN] = 0x10000000,
893 // no limits for anything else
895 AVIOContext *pb = matroska->ctx->pb;
896 uint32_t id = syntax->id;
900 data = (char *) data + syntax->data_offset;
901 if (syntax->list_elem_size) {
902 EbmlList *list = data;
903 if ((res = av_reallocp_array(&list->elem,
905 syntax->list_elem_size)) < 0) {
909 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
910 memset(data, 0, syntax->list_elem_size);
914 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
915 matroska->current_id = 0;
916 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
918 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
919 av_log(matroska->ctx, AV_LOG_ERROR,
920 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
921 length, max_lengths[syntax->type], syntax->type);
922 return AVERROR_INVALIDDATA;
926 switch (syntax->type) {
928 res = ebml_read_uint(pb, length, data);
931 res = ebml_read_float(pb, length, data);
935 res = ebml_read_ascii(pb, length, data);
938 res = ebml_read_binary(pb, length, data);
941 if ((res = ebml_read_master(matroska, length)) < 0)
943 if (id == MATROSKA_ID_SEGMENT)
944 matroska->segment_start = avio_tell(matroska->ctx->pb);
945 return ebml_parse_nest(matroska, syntax->def.n, data);
947 return ebml_parse_id(matroska, syntax->def.n, id, data);
951 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
953 if (res == AVERROR_INVALIDDATA)
954 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
955 else if (res == AVERROR(EIO))
956 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
960 static void ebml_free(EbmlSyntax *syntax, void *data)
963 for (i = 0; syntax[i].id; i++) {
964 void *data_off = (char *) data + syntax[i].data_offset;
965 switch (syntax[i].type) {
971 av_freep(&((EbmlBin *) data_off)->data);
974 if (syntax[i].list_elem_size) {
975 EbmlList *list = data_off;
976 char *ptr = list->elem;
977 for (j = 0; j < list->nb_elem;
978 j++, ptr += syntax[i].list_elem_size)
979 ebml_free(syntax[i].def.n, ptr);
982 ebml_free(syntax[i].def.n, data_off);
992 static int matroska_probe(AVProbeData *p)
995 int len_mask = 0x80, size = 1, n = 1, i;
998 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1001 /* length of header */
1003 while (size <= 8 && !(total & len_mask)) {
1009 total &= (len_mask - 1);
1011 total = (total << 8) | p->buf[4 + n++];
1013 /* Does the probe data contain the whole header? */
1014 if (p->buf_size < 4 + size + total)
1017 /* The header should contain a known document type. For now,
1018 * we don't parse the whole header but simply check for the
1019 * availability of that array of characters inside the header.
1020 * Not fully fool-proof, but good enough. */
1021 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1022 int probelen = strlen(matroska_doctypes[i]);
1023 if (total < probelen)
1025 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1026 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1027 return AVPROBE_SCORE_MAX;
1030 // probably valid EBML header but no recognized doctype
1031 return AVPROBE_SCORE_EXTENSION;
1034 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1037 MatroskaTrack *tracks = matroska->tracks.elem;
1040 for (i = 0; i < matroska->tracks.nb_elem; i++)
1041 if (tracks[i].num == num)
1044 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1048 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1049 MatroskaTrack *track)
1051 MatroskaTrackEncoding *encodings = track->encodings.elem;
1052 uint8_t *data = *buf;
1053 int isize = *buf_size;
1054 uint8_t *pkt_data = NULL;
1055 uint8_t av_unused *newpktdata;
1056 int pkt_size = isize;
1060 if (pkt_size >= 10000000)
1061 return AVERROR_INVALIDDATA;
1063 switch (encodings[0].compression.algo) {
1064 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1066 int header_size = encodings[0].compression.settings.size;
1067 uint8_t *header = encodings[0].compression.settings.data;
1072 pkt_size = isize + header_size;
1073 pkt_data = av_malloc(pkt_size);
1075 return AVERROR(ENOMEM);
1077 memcpy(pkt_data, header, header_size);
1078 memcpy(pkt_data + header_size, data, isize);
1082 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1084 olen = pkt_size *= 3;
1085 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1087 result = AVERROR(ENOMEM);
1090 pkt_data = newpktdata;
1091 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1092 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1094 result = AVERROR_INVALIDDATA;
1101 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1103 z_stream zstream = { 0 };
1104 if (inflateInit(&zstream) != Z_OK)
1106 zstream.next_in = data;
1107 zstream.avail_in = isize;
1110 newpktdata = av_realloc(pkt_data, pkt_size);
1112 inflateEnd(&zstream);
1115 pkt_data = newpktdata;
1116 zstream.avail_out = pkt_size - zstream.total_out;
1117 zstream.next_out = pkt_data + zstream.total_out;
1118 result = inflate(&zstream, Z_NO_FLUSH);
1119 } while (result == Z_OK && pkt_size < 10000000);
1120 pkt_size = zstream.total_out;
1121 inflateEnd(&zstream);
1122 if (result != Z_STREAM_END) {
1123 if (result == Z_MEM_ERROR)
1124 result = AVERROR(ENOMEM);
1126 result = AVERROR_INVALIDDATA;
1133 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1135 bz_stream bzstream = { 0 };
1136 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1138 bzstream.next_in = data;
1139 bzstream.avail_in = isize;
1142 newpktdata = av_realloc(pkt_data, pkt_size);
1144 BZ2_bzDecompressEnd(&bzstream);
1147 pkt_data = newpktdata;
1148 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1149 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1150 result = BZ2_bzDecompress(&bzstream);
1151 } while (result == BZ_OK && pkt_size < 10000000);
1152 pkt_size = bzstream.total_out_lo32;
1153 BZ2_bzDecompressEnd(&bzstream);
1154 if (result != BZ_STREAM_END) {
1155 if (result == BZ_MEM_ERROR)
1156 result = AVERROR(ENOMEM);
1158 result = AVERROR_INVALIDDATA;
1165 return AVERROR_INVALIDDATA;
1169 *buf_size = pkt_size;
1177 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1178 AVPacket *pkt, uint64_t display_duration)
1181 char *layer, *ptr = pkt->data, *end = ptr + pkt->size;
1183 for (; *ptr != ',' && ptr < end - 1; ptr++)
1187 for (; *ptr != ',' && ptr < end - 1; ptr++)
1190 int64_t end_pts = pkt->pts + display_duration;
1191 int sc = matroska->time_scale * pkt->pts / 10000000;
1192 int ec = matroska->time_scale * end_pts / 10000000;
1193 int sh, sm, ss, eh, em, es, len;
1207 len = 50 + end - ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1208 if (!(line = av_buffer_alloc(len)))
1210 snprintf(line->data, len,
1211 "Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1212 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1213 av_buffer_unref(&pkt->buf);
1215 pkt->data = line->data;
1216 pkt->size = strlen(line->data);
1220 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1222 int old_size = out->size;
1223 int ret = av_grow_packet(out, in->size);
1227 memcpy(out->data + old_size, in->data, in->size);
1234 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1235 AVDictionary **metadata, char *prefix)
1237 MatroskaTag *tags = list->elem;
1241 for (i = 0; i < list->nb_elem; i++) {
1242 const char *lang = tags[i].lang &&
1243 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1245 if (!tags[i].name) {
1246 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1250 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1252 av_strlcpy(key, tags[i].name, sizeof(key));
1253 if (tags[i].def || !lang) {
1254 av_dict_set(metadata, key, tags[i].string, 0);
1255 if (tags[i].sub.nb_elem)
1256 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1259 av_strlcat(key, "-", sizeof(key));
1260 av_strlcat(key, lang, sizeof(key));
1261 av_dict_set(metadata, key, tags[i].string, 0);
1262 if (tags[i].sub.nb_elem)
1263 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1266 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1269 static void matroska_convert_tags(AVFormatContext *s)
1271 MatroskaDemuxContext *matroska = s->priv_data;
1272 MatroskaTags *tags = matroska->tags.elem;
1275 for (i = 0; i < matroska->tags.nb_elem; i++) {
1276 if (tags[i].target.attachuid) {
1277 MatroskaAttachment *attachment = matroska->attachments.elem;
1278 for (j = 0; j < matroska->attachments.nb_elem; j++)
1279 if (attachment[j].uid == tags[i].target.attachuid &&
1280 attachment[j].stream)
1281 matroska_convert_tag(s, &tags[i].tag,
1282 &attachment[j].stream->metadata, NULL);
1283 } else if (tags[i].target.chapteruid) {
1284 MatroskaChapter *chapter = matroska->chapters.elem;
1285 for (j = 0; j < matroska->chapters.nb_elem; j++)
1286 if (chapter[j].uid == tags[i].target.chapteruid &&
1288 matroska_convert_tag(s, &tags[i].tag,
1289 &chapter[j].chapter->metadata, NULL);
1290 } else if (tags[i].target.trackuid) {
1291 MatroskaTrack *track = matroska->tracks.elem;
1292 for (j = 0; j < matroska->tracks.nb_elem; j++)
1293 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1294 matroska_convert_tag(s, &tags[i].tag,
1295 &track[j].stream->metadata, NULL);
1297 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1298 tags[i].target.type);
1303 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1306 EbmlList *seekhead_list = &matroska->seekhead;
1307 uint32_t level_up = matroska->level_up;
1308 uint32_t saved_id = matroska->current_id;
1309 MatroskaSeekhead *seekhead = seekhead_list->elem;
1310 int64_t before_pos = avio_tell(matroska->ctx->pb);
1311 MatroskaLevel level;
1315 if (idx >= seekhead_list->nb_elem ||
1316 seekhead[idx].id == MATROSKA_ID_SEEKHEAD ||
1317 seekhead[idx].id == MATROSKA_ID_CLUSTER)
1321 offset = seekhead[idx].pos + matroska->segment_start;
1322 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1323 /* We don't want to lose our seekhead level, so we add
1324 * a dummy. This is a crude hack. */
1325 if (matroska->num_levels == EBML_MAX_DEPTH) {
1326 av_log(matroska->ctx, AV_LOG_INFO,
1327 "Max EBML element depth (%d) reached, "
1328 "cannot parse further.\n", EBML_MAX_DEPTH);
1329 ret = AVERROR_INVALIDDATA;
1332 level.length = (uint64_t) -1;
1333 matroska->levels[matroska->num_levels] = level;
1334 matroska->num_levels++;
1335 matroska->current_id = 0;
1337 ret = ebml_parse(matroska, matroska_segment, matroska);
1339 /* remove dummy level */
1340 while (matroska->num_levels) {
1341 uint64_t length = matroska->levels[--matroska->num_levels].length;
1342 if (length == (uint64_t) -1)
1348 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1349 matroska->level_up = level_up;
1350 matroska->current_id = saved_id;
1355 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1357 EbmlList *seekhead_list = &matroska->seekhead;
1358 int64_t before_pos = avio_tell(matroska->ctx->pb);
1361 // we should not do any seeking in the streaming case
1362 if (!matroska->ctx->pb->seekable ||
1363 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1366 for (i = 0; i < seekhead_list->nb_elem; i++) {
1367 MatroskaSeekhead *seekhead = seekhead_list->elem;
1368 if (seekhead[i].pos <= before_pos)
1371 // defer cues parsing until we actually need cue data.
1372 if (seekhead[i].id == MATROSKA_ID_CUES) {
1373 matroska->cues_parsing_deferred = 1;
1377 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1382 static void matroska_parse_cues(MatroskaDemuxContext *matroska)
1384 EbmlList *seekhead_list = &matroska->seekhead;
1385 MatroskaSeekhead *seekhead = seekhead_list->elem;
1386 EbmlList *index_list;
1387 MatroskaIndex *index;
1388 int index_scale = 1;
1391 for (i = 0; i < seekhead_list->nb_elem; i++)
1392 if (seekhead[i].id == MATROSKA_ID_CUES)
1394 assert(i <= seekhead_list->nb_elem);
1396 matroska_parse_seekhead_entry(matroska, i);
1398 index_list = &matroska->index;
1399 index = index_list->elem;
1400 if (index_list->nb_elem &&
1401 index[0].time > 1E14 / matroska->time_scale) {
1402 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1403 index_scale = matroska->time_scale;
1405 for (i = 0; i < index_list->nb_elem; i++) {
1406 EbmlList *pos_list = &index[i].pos;
1407 MatroskaIndexPos *pos = pos_list->elem;
1408 for (j = 0; j < pos_list->nb_elem; j++) {
1409 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1411 if (track && track->stream)
1412 av_add_index_entry(track->stream,
1413 pos[j].pos + matroska->segment_start,
1414 index[i].time / index_scale, 0, 0,
1420 static int matroska_aac_profile(char *codec_id)
1422 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1425 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1426 if (strstr(codec_id, aac_profiles[profile]))
1431 static int matroska_aac_sri(int samplerate)
1435 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1436 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1441 static int matroska_read_header(AVFormatContext *s)
1443 MatroskaDemuxContext *matroska = s->priv_data;
1444 EbmlList *attachments_list = &matroska->attachments;
1445 EbmlList *chapters_list = &matroska->chapters;
1446 MatroskaAttachment *attachments;
1447 MatroskaChapter *chapters;
1448 MatroskaTrack *tracks;
1449 uint64_t max_start = 0;
1457 /* First read the EBML header. */
1458 if (ebml_parse(matroska, ebml_syntax, &ebml) ||
1459 ebml.version > EBML_VERSION ||
1460 ebml.max_size > sizeof(uint64_t) ||
1461 ebml.id_length > sizeof(uint32_t) ||
1462 ebml.doctype_version > 2) {
1463 av_log(matroska->ctx, AV_LOG_ERROR,
1464 "EBML header using unsupported features\n"
1465 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1466 ebml.version, ebml.doctype, ebml.doctype_version);
1467 ebml_free(ebml_syntax, &ebml);
1468 return AVERROR_PATCHWELCOME;
1470 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1471 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1473 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1474 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1475 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1476 ebml_free(ebml_syntax, &ebml);
1477 return AVERROR_INVALIDDATA;
1480 ebml_free(ebml_syntax, &ebml);
1482 /* The next thing is a segment. */
1483 pos = avio_tell(matroska->ctx->pb);
1484 res = ebml_parse(matroska, matroska_segments, matroska);
1485 // try resyncing until we find a EBML_STOP type element.
1487 res = matroska_resync(matroska, pos);
1490 pos = avio_tell(matroska->ctx->pb);
1491 res = ebml_parse(matroska, matroska_segment, matroska);
1493 matroska_execute_seekhead(matroska);
1495 if (!matroska->time_scale)
1496 matroska->time_scale = 1000000;
1497 if (matroska->duration)
1498 matroska->ctx->duration = matroska->duration * matroska->time_scale *
1499 1000 / AV_TIME_BASE;
1500 av_dict_set(&s->metadata, "title", matroska->title, 0);
1502 tracks = matroska->tracks.elem;
1503 for (i = 0; i < matroska->tracks.nb_elem; i++) {
1504 MatroskaTrack *track = &tracks[i];
1505 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1506 EbmlList *encodings_list = &track->encodings;
1507 MatroskaTrackEncoding *encodings = encodings_list->elem;
1508 uint8_t *extradata = NULL;
1509 int extradata_size = 0;
1510 int extradata_offset = 0;
1513 /* Apply some sanity checks. */
1514 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1515 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1516 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1517 av_log(matroska->ctx, AV_LOG_INFO,
1518 "Unknown or unsupported track type %"PRIu64"\n",
1522 if (track->codec_id == NULL)
1525 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1526 if (!track->default_duration && track->video.frame_rate > 0)
1527 track->default_duration = 1000000000 / track->video.frame_rate;
1528 if (!track->video.display_width)
1529 track->video.display_width = track->video.pixel_width;
1530 if (!track->video.display_height)
1531 track->video.display_height = track->video.pixel_height;
1532 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1533 if (!track->audio.out_samplerate)
1534 track->audio.out_samplerate = track->audio.samplerate;
1536 if (encodings_list->nb_elem > 1) {
1537 av_log(matroska->ctx, AV_LOG_ERROR,
1538 "Multiple combined encodings not supported");
1539 } else if (encodings_list->nb_elem == 1) {
1540 if (encodings[0].type ||
1543 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1546 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1549 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1551 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP)) {
1552 encodings[0].scope = 0;
1553 av_log(matroska->ctx, AV_LOG_ERROR,
1554 "Unsupported encoding type");
1555 } else if (track->codec_priv.size && encodings[0].scope & 2) {
1556 uint8_t *codec_priv = track->codec_priv.data;
1557 int ret = matroska_decode_buffer(&track->codec_priv.data,
1558 &track->codec_priv.size,
1561 track->codec_priv.data = NULL;
1562 track->codec_priv.size = 0;
1563 av_log(matroska->ctx, AV_LOG_ERROR,
1564 "Failed to decode codec private data\n");
1567 if (codec_priv != track->codec_priv.data)
1568 av_free(codec_priv);
1572 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1573 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1574 strlen(ff_mkv_codec_tags[j].str))) {
1575 codec_id = ff_mkv_codec_tags[j].id;
1580 st = track->stream = avformat_new_stream(s, NULL);
1582 return AVERROR(ENOMEM);
1584 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1585 track->codec_priv.size >= 40 &&
1586 track->codec_priv.data != NULL) {
1587 track->ms_compat = 1;
1588 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1589 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
1590 track->video.fourcc);
1591 extradata_offset = 40;
1592 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1593 track->codec_priv.size >= 14 &&
1594 track->codec_priv.data != NULL) {
1596 ffio_init_context(&b, track->codec_priv.data,
1597 track->codec_priv.size,
1598 0, NULL, NULL, NULL, NULL);
1599 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1602 codec_id = st->codec->codec_id;
1603 extradata_offset = FFMIN(track->codec_priv.size, 18);
1604 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1605 (track->codec_priv.size >= 86) &&
1606 (track->codec_priv.data != NULL)) {
1607 track->video.fourcc = AV_RL32(track->codec_priv.data);
1608 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
1609 track->video.fourcc);
1610 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1611 switch (track->audio.bitdepth) {
1613 codec_id = AV_CODEC_ID_PCM_U8;
1616 codec_id = AV_CODEC_ID_PCM_S24BE;
1619 codec_id = AV_CODEC_ID_PCM_S32BE;
1622 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1623 switch (track->audio.bitdepth) {
1625 codec_id = AV_CODEC_ID_PCM_U8;
1628 codec_id = AV_CODEC_ID_PCM_S24LE;
1631 codec_id = AV_CODEC_ID_PCM_S32LE;
1634 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1635 track->audio.bitdepth == 64) {
1636 codec_id = AV_CODEC_ID_PCM_F64LE;
1637 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1638 int profile = matroska_aac_profile(track->codec_id);
1639 int sri = matroska_aac_sri(track->audio.samplerate);
1640 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1641 if (extradata == NULL)
1642 return AVERROR(ENOMEM);
1643 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1644 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1645 if (strstr(track->codec_id, "SBR")) {
1646 sri = matroska_aac_sri(track->audio.out_samplerate);
1647 extradata[2] = 0x56;
1648 extradata[3] = 0xE5;
1649 extradata[4] = 0x80 | (sri << 3);
1653 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1654 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1655 * Create the "atom size", "tag", and "tag version" fields the
1656 * decoder expects manually. */
1657 extradata_size = 12 + track->codec_priv.size;
1658 extradata = av_mallocz(extradata_size +
1659 FF_INPUT_BUFFER_PADDING_SIZE);
1660 if (extradata == NULL)
1661 return AVERROR(ENOMEM);
1662 AV_WB32(extradata, extradata_size);
1663 memcpy(&extradata[4], "alac", 4);
1664 AV_WB32(&extradata[8], 0);
1665 memcpy(&extradata[12], track->codec_priv.data,
1666 track->codec_priv.size);
1667 } else if (codec_id == AV_CODEC_ID_TTA) {
1668 extradata_size = 30;
1669 extradata = av_mallocz(extradata_size);
1670 if (extradata == NULL)
1671 return AVERROR(ENOMEM);
1672 ffio_init_context(&b, extradata, extradata_size, 1,
1673 NULL, NULL, NULL, NULL);
1674 avio_write(&b, "TTA1", 4);
1676 avio_wl16(&b, track->audio.channels);
1677 avio_wl16(&b, track->audio.bitdepth);
1678 avio_wl32(&b, track->audio.out_samplerate);
1679 avio_wl32(&b, matroska->ctx->duration *
1680 track->audio.out_samplerate);
1681 } else if (codec_id == AV_CODEC_ID_RV10 ||
1682 codec_id == AV_CODEC_ID_RV20 ||
1683 codec_id == AV_CODEC_ID_RV30 ||
1684 codec_id == AV_CODEC_ID_RV40) {
1685 extradata_offset = 26;
1686 } else if (codec_id == AV_CODEC_ID_RA_144) {
1687 track->audio.out_samplerate = 8000;
1688 track->audio.channels = 1;
1689 } else if (codec_id == AV_CODEC_ID_RA_288 ||
1690 codec_id == AV_CODEC_ID_COOK ||
1691 codec_id == AV_CODEC_ID_ATRAC3 ||
1692 codec_id == AV_CODEC_ID_SIPR) {
1694 ffio_init_context(&b, track->codec_priv.data,
1695 track->codec_priv.size,
1696 0, NULL, NULL, NULL, NULL);
1698 flavor = avio_rb16(&b);
1699 track->audio.coded_framesize = avio_rb32(&b);
1701 track->audio.sub_packet_h = avio_rb16(&b);
1702 track->audio.frame_size = avio_rb16(&b);
1703 track->audio.sub_packet_size = avio_rb16(&b);
1705 track->audio.coded_framesize <= 0 ||
1706 track->audio.sub_packet_h <= 0 ||
1707 track->audio.frame_size <= 0 ||
1708 track->audio.sub_packet_size <= 0)
1709 return AVERROR_INVALIDDATA;
1710 track->audio.buf = av_malloc(track->audio.frame_size *
1711 track->audio.sub_packet_h);
1712 if (codec_id == AV_CODEC_ID_RA_288) {
1713 st->codec->block_align = track->audio.coded_framesize;
1714 track->codec_priv.size = 0;
1716 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1717 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1718 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1719 st->codec->bit_rate = sipr_bit_rate[flavor];
1721 st->codec->block_align = track->audio.sub_packet_size;
1722 extradata_offset = 78;
1725 track->codec_priv.size -= extradata_offset;
1727 if (codec_id == AV_CODEC_ID_NONE)
1728 av_log(matroska->ctx, AV_LOG_INFO,
1729 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1731 if (track->time_scale < 0.01)
1732 track->time_scale = 1.0;
1733 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1734 1000 * 1000 * 1000); /* 64 bit pts in ns */
1736 /* convert the delay from ns to the track timebase */
1737 track->codec_delay = av_rescale_q(track->codec_delay,
1738 (AVRational){ 1, 1000000000 },
1741 st->codec->codec_id = codec_id;
1743 if (strcmp(track->language, "und"))
1744 av_dict_set(&st->metadata, "language", track->language, 0);
1745 av_dict_set(&st->metadata, "title", track->name, 0);
1747 if (track->flag_default)
1748 st->disposition |= AV_DISPOSITION_DEFAULT;
1749 if (track->flag_forced)
1750 st->disposition |= AV_DISPOSITION_FORCED;
1752 if (!st->codec->extradata) {
1754 st->codec->extradata = extradata;
1755 st->codec->extradata_size = extradata_size;
1756 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1757 st->codec->extradata = av_mallocz(track->codec_priv.size +
1758 FF_INPUT_BUFFER_PADDING_SIZE);
1759 if (st->codec->extradata == NULL)
1760 return AVERROR(ENOMEM);
1761 st->codec->extradata_size = track->codec_priv.size;
1762 memcpy(st->codec->extradata,
1763 track->codec_priv.data + extradata_offset,
1764 track->codec_priv.size);
1768 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1769 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1770 st->codec->codec_tag = track->video.fourcc;
1771 st->codec->width = track->video.pixel_width;
1772 st->codec->height = track->video.pixel_height;
1773 av_reduce(&st->sample_aspect_ratio.num,
1774 &st->sample_aspect_ratio.den,
1775 st->codec->height * track->video.display_width,
1776 st->codec->width * track->video.display_height,
1778 if (st->codec->codec_id != AV_CODEC_ID_H264 &&
1779 st->codec->codec_id != AV_CODEC_ID_HEVC)
1780 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1781 if (track->default_duration) {
1782 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1783 1000000000, track->default_duration, 30000);
1785 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1786 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1787 st->codec->sample_rate = track->audio.out_samplerate;
1788 st->codec->channels = track->audio.channels;
1789 if (st->codec->codec_id != AV_CODEC_ID_AAC)
1790 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1791 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1792 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1793 if (st->codec->codec_id == AV_CODEC_ID_SSA)
1794 matroska->contains_ssa = 1;
1798 attachments = attachments_list->elem;
1799 for (j = 0; j < attachments_list->nb_elem; j++) {
1800 if (!(attachments[j].filename && attachments[j].mime &&
1801 attachments[j].bin.data && attachments[j].bin.size > 0)) {
1802 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1804 AVStream *st = avformat_new_stream(s, NULL);
1807 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
1808 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
1809 st->codec->codec_id = AV_CODEC_ID_NONE;
1810 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1811 st->codec->extradata = av_malloc(attachments[j].bin.size);
1812 if (st->codec->extradata == NULL)
1814 st->codec->extradata_size = attachments[j].bin.size;
1815 memcpy(st->codec->extradata, attachments[j].bin.data,
1816 attachments[j].bin.size);
1818 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1819 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
1820 strlen(ff_mkv_mime_tags[i].str))) {
1821 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1825 attachments[j].stream = st;
1829 chapters = chapters_list->elem;
1830 for (i = 0; i < chapters_list->nb_elem; i++)
1831 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
1832 (max_start == 0 || chapters[i].start > max_start)) {
1833 chapters[i].chapter =
1834 avpriv_new_chapter(s, chapters[i].uid,
1835 (AVRational) { 1, 1000000000 },
1836 chapters[i].start, chapters[i].end,
1838 av_dict_set(&chapters[i].chapter->metadata,
1839 "title", chapters[i].title, 0);
1840 max_start = chapters[i].start;
1843 matroska_convert_tags(s);
1849 * Put one packet in an application-supplied AVPacket struct.
1850 * Returns 0 on success or -1 on failure.
1852 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1855 if (matroska->num_packets > 0) {
1856 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1857 av_free(matroska->packets[0]);
1858 if (matroska->num_packets > 1) {
1860 memmove(&matroska->packets[0], &matroska->packets[1],
1861 (matroska->num_packets - 1) * sizeof(AVPacket *));
1862 newpackets = av_realloc(matroska->packets,
1863 (matroska->num_packets - 1) *
1864 sizeof(AVPacket *));
1866 matroska->packets = newpackets;
1868 av_freep(&matroska->packets);
1869 matroska->prev_pkt = NULL;
1871 matroska->num_packets--;
1879 * Free all packets in our internal queue.
1881 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1883 matroska->prev_pkt = NULL;
1884 if (matroska->packets) {
1886 for (n = 0; n < matroska->num_packets; n++) {
1887 av_free_packet(matroska->packets[n]);
1888 av_free(matroska->packets[n]);
1890 av_freep(&matroska->packets);
1891 matroska->num_packets = 0;
1895 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
1896 int *buf_size, int type,
1897 uint32_t **lace_buf, int *laces)
1899 int res = 0, n, size = *buf_size;
1900 uint8_t *data = *buf;
1901 uint32_t *lace_size;
1905 *lace_buf = av_mallocz(sizeof(int));
1907 return AVERROR(ENOMEM);
1909 *lace_buf[0] = size;
1917 lace_size = av_mallocz(*laces * sizeof(int));
1919 return AVERROR(ENOMEM);
1922 case 0x1: /* Xiph lacing */
1926 for (n = 0; res == 0 && n < *laces - 1; n++) {
1933 lace_size[n] += temp;
1939 total += lace_size[n];
1941 if (size <= total) {
1942 res = AVERROR_INVALIDDATA;
1946 lace_size[n] = size - total;
1950 case 0x2: /* fixed-size lacing */
1951 if (size % (*laces)) {
1952 res = AVERROR_INVALIDDATA;
1955 for (n = 0; n < *laces; n++)
1956 lace_size[n] = size / *laces;
1959 case 0x3: /* EBML lacing */
1963 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1965 av_log(matroska->ctx, AV_LOG_INFO,
1966 "EBML block data error\n");
1972 total = lace_size[0] = num;
1973 for (n = 1; res == 0 && n < *laces - 1; n++) {
1976 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1978 av_log(matroska->ctx, AV_LOG_INFO,
1979 "EBML block data error\n");
1985 lace_size[n] = lace_size[n - 1] + snum;
1986 total += lace_size[n];
1988 if (size <= total) {
1989 res = AVERROR_INVALIDDATA;
1992 lace_size[*laces - 1] = size - total;
1998 *lace_buf = lace_size;
2004 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2005 MatroskaTrack *track, AVStream *st,
2006 uint8_t *data, int size, uint64_t timecode,
2007 uint64_t duration, int64_t pos)
2009 int a = st->codec->block_align;
2010 int sps = track->audio.sub_packet_size;
2011 int cfs = track->audio.coded_framesize;
2012 int h = track->audio.sub_packet_h;
2013 int y = track->audio.sub_packet_cnt;
2014 int w = track->audio.frame_size;
2017 if (!track->audio.pkt_cnt) {
2018 if (track->audio.sub_packet_cnt == 0)
2019 track->audio.buf_timecode = timecode;
2020 if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2021 if (size < cfs * h / 2) {
2022 av_log(matroska->ctx, AV_LOG_ERROR,
2023 "Corrupt int4 RM-style audio packet size\n");
2024 return AVERROR_INVALIDDATA;
2026 for (x = 0; x < h / 2; x++)
2027 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2028 data + x * cfs, cfs);
2029 } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2031 av_log(matroska->ctx, AV_LOG_ERROR,
2032 "Corrupt sipr RM-style audio packet size\n");
2033 return AVERROR_INVALIDDATA;
2035 memcpy(track->audio.buf + y * w, data, w);
2037 if (size < sps * w / sps) {
2038 av_log(matroska->ctx, AV_LOG_ERROR,
2039 "Corrupt generic RM-style audio packet size\n");
2040 return AVERROR_INVALIDDATA;
2042 for (x = 0; x < w / sps; x++)
2043 memcpy(track->audio.buf +
2044 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2045 data + x * sps, sps);
2048 if (++track->audio.sub_packet_cnt >= h) {
2049 if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2050 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2051 track->audio.sub_packet_cnt = 0;
2052 track->audio.pkt_cnt = h * w / a;
2056 while (track->audio.pkt_cnt) {
2057 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2058 av_new_packet(pkt, a);
2060 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2062 pkt->pts = track->audio.buf_timecode;
2063 track->audio.buf_timecode = AV_NOPTS_VALUE;
2065 pkt->stream_index = st->index;
2066 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2072 /* reconstruct full wavpack blocks from mangled matroska ones */
2073 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2074 uint8_t **pdst, int *size)
2076 uint8_t *dst = NULL;
2081 int ret, offset = 0;
2083 if (srclen < 12 || track->stream->codec->extradata_size < 2)
2084 return AVERROR_INVALIDDATA;
2086 ver = AV_RL16(track->stream->codec->extradata);
2088 samples = AV_RL32(src);
2092 while (srclen >= 8) {
2097 uint32_t flags = AV_RL32(src);
2098 uint32_t crc = AV_RL32(src + 4);
2102 multiblock = (flags & 0x1800) != 0x1800;
2105 ret = AVERROR_INVALIDDATA;
2108 blocksize = AV_RL32(src);
2114 if (blocksize > srclen) {
2115 ret = AVERROR_INVALIDDATA;
2119 tmp = av_realloc(dst, dstlen + blocksize + 32);
2121 ret = AVERROR(ENOMEM);
2125 dstlen += blocksize + 32;
2127 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2128 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2129 AV_WL16(dst + offset + 8, ver); // version
2130 AV_WL16(dst + offset + 10, 0); // track/index_no
2131 AV_WL32(dst + offset + 12, 0); // total samples
2132 AV_WL32(dst + offset + 16, 0); // block index
2133 AV_WL32(dst + offset + 20, samples); // number of samples
2134 AV_WL32(dst + offset + 24, flags); // flags
2135 AV_WL32(dst + offset + 28, crc); // crc
2136 memcpy(dst + offset + 32, src, blocksize); // block data
2139 srclen -= blocksize;
2140 offset += blocksize + 32;
2153 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2154 MatroskaTrack *track, AVStream *st,
2155 uint8_t *data, int pkt_size,
2156 uint64_t timecode, uint64_t duration,
2157 int64_t pos, int is_keyframe)
2159 MatroskaTrackEncoding *encodings = track->encodings.elem;
2160 uint8_t *pkt_data = data;
2161 int offset = 0, res;
2164 if (encodings && encodings->scope & 1) {
2165 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2170 if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2172 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2174 av_log(matroska->ctx, AV_LOG_ERROR,
2175 "Error parsing a wavpack block.\n");
2178 if (pkt_data != data)
2179 av_freep(&pkt_data);
2183 if (st->codec->codec_id == AV_CODEC_ID_PRORES)
2186 pkt = av_mallocz(sizeof(AVPacket));
2187 /* XXX: prevent data copy... */
2188 if (av_new_packet(pkt, pkt_size + offset) < 0) {
2190 return AVERROR(ENOMEM);
2193 if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
2194 uint8_t *buf = pkt->data;
2195 bytestream_put_be32(&buf, pkt_size);
2196 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2199 memcpy(pkt->data + offset, pkt_data, pkt_size);
2201 if (pkt_data != data)
2204 pkt->flags = is_keyframe;
2205 pkt->stream_index = st->index;
2207 if (track->ms_compat)
2208 pkt->dts = timecode;
2210 pkt->pts = timecode;
2212 if (st->codec->codec_id == AV_CODEC_ID_TEXT)
2213 pkt->convergence_duration = duration;
2214 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
2215 pkt->duration = duration;
2217 if (st->codec->codec_id == AV_CODEC_ID_SSA)
2218 matroska_fix_ass_packet(matroska, pkt, duration);
2220 if (matroska->prev_pkt &&
2221 timecode != AV_NOPTS_VALUE &&
2222 matroska->prev_pkt->pts == timecode &&
2223 matroska->prev_pkt->stream_index == st->index &&
2224 st->codec->codec_id == AV_CODEC_ID_SSA)
2225 matroska_merge_packets(matroska->prev_pkt, pkt);
2227 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2228 matroska->prev_pkt = pkt;
2234 if (pkt_data != data)
2235 av_freep(&pkt_data);
2239 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2240 int size, int64_t pos, uint64_t cluster_time,
2241 uint64_t block_duration, int is_keyframe,
2242 int64_t cluster_pos)
2244 uint64_t timecode = AV_NOPTS_VALUE;
2245 MatroskaTrack *track;
2249 uint32_t *lace_size = NULL;
2250 int n, flags, laces = 0;
2251 uint64_t num, duration;
2253 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2254 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2260 track = matroska_find_track_by_num(matroska, num);
2261 if (!track || !track->stream) {
2262 av_log(matroska->ctx, AV_LOG_INFO,
2263 "Invalid stream %"PRIu64" or size %u\n", num, size);
2264 return AVERROR_INVALIDDATA;
2265 } else if (size <= 3)
2268 if (st->discard >= AVDISCARD_ALL)
2271 block_time = AV_RB16(data);
2275 if (is_keyframe == -1)
2276 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2278 if (cluster_time != (uint64_t) -1 &&
2279 (block_time >= 0 || cluster_time >= -block_time)) {
2280 timecode = cluster_time + block_time - track->codec_delay;
2281 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2282 timecode < track->end_timecode)
2283 is_keyframe = 0; /* overlapping subtitles are not key frame */
2285 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2289 if (matroska->skip_to_keyframe &&
2290 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2291 if (!is_keyframe || timecode < matroska->skip_to_timecode)
2293 matroska->skip_to_keyframe = 0;
2296 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2297 &lace_size, &laces);
2302 if (block_duration != AV_NOPTS_VALUE) {
2303 duration = block_duration / laces;
2304 if (block_duration != duration * laces) {
2305 av_log(matroska->ctx, AV_LOG_WARNING,
2306 "Incorrect block_duration, possibly corrupted container");
2309 duration = track->default_duration / matroska->time_scale;
2310 block_duration = duration * laces;
2313 if (timecode != AV_NOPTS_VALUE)
2314 track->end_timecode =
2315 FFMAX(track->end_timecode, timecode + block_duration);
2317 for (n = 0; n < laces; n++) {
2318 if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2319 st->codec->codec_id == AV_CODEC_ID_COOK ||
2320 st->codec->codec_id == AV_CODEC_ID_SIPR ||
2321 st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2322 st->codec->block_align && track->audio.sub_packet_size) {
2323 res = matroska_parse_rm_audio(matroska, track, st, data,
2325 timecode, duration, pos);
2329 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2330 timecode, duration, pos,
2331 !n ? is_keyframe : 0);
2336 if (timecode != AV_NOPTS_VALUE)
2337 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2338 data += lace_size[n];
2346 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2348 EbmlList *blocks_list;
2349 MatroskaBlock *blocks;
2351 res = ebml_parse(matroska,
2352 matroska_cluster_incremental_parsing,
2353 &matroska->current_cluster);
2356 if (matroska->current_cluster_pos)
2357 ebml_level_end(matroska);
2358 ebml_free(matroska_cluster, &matroska->current_cluster);
2359 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2360 matroska->current_cluster_num_blocks = 0;
2361 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2362 matroska->prev_pkt = NULL;
2363 /* sizeof the ID which was already read */
2364 if (matroska->current_id)
2365 matroska->current_cluster_pos -= 4;
2366 res = ebml_parse(matroska,
2367 matroska_clusters_incremental,
2368 &matroska->current_cluster);
2369 /* Try parsing the block again. */
2371 res = ebml_parse(matroska,
2372 matroska_cluster_incremental_parsing,
2373 &matroska->current_cluster);
2377 matroska->current_cluster_num_blocks <
2378 matroska->current_cluster.blocks.nb_elem) {
2379 blocks_list = &matroska->current_cluster.blocks;
2380 blocks = blocks_list->elem;
2382 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2383 i = blocks_list->nb_elem - 1;
2384 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2385 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2386 if (!blocks[i].non_simple)
2387 blocks[i].duration = AV_NOPTS_VALUE;
2388 res = matroska_parse_block(matroska, blocks[i].bin.data,
2389 blocks[i].bin.size, blocks[i].bin.pos,
2390 matroska->current_cluster.timecode,
2391 blocks[i].duration, is_keyframe,
2392 matroska->current_cluster_pos);
2401 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2403 MatroskaCluster cluster = { 0 };
2404 EbmlList *blocks_list;
2405 MatroskaBlock *blocks;
2409 if (!matroska->contains_ssa)
2410 return matroska_parse_cluster_incremental(matroska);
2411 pos = avio_tell(matroska->ctx->pb);
2412 matroska->prev_pkt = NULL;
2413 if (matroska->current_id)
2414 pos -= 4; /* sizeof the ID which was already read */
2415 res = ebml_parse(matroska, matroska_clusters, &cluster);
2416 blocks_list = &cluster.blocks;
2417 blocks = blocks_list->elem;
2418 for (i = 0; i < blocks_list->nb_elem && !res; i++)
2419 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2420 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2421 if (!blocks[i].non_simple)
2422 blocks[i].duration = AV_NOPTS_VALUE;
2423 res = matroska_parse_block(matroska, blocks[i].bin.data,
2424 blocks[i].bin.size, blocks[i].bin.pos,
2425 cluster.timecode, blocks[i].duration,
2428 ebml_free(matroska_cluster, &cluster);
2432 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2434 MatroskaDemuxContext *matroska = s->priv_data;
2437 while (!ret && matroska_deliver_packet(matroska, pkt)) {
2438 int64_t pos = avio_tell(matroska->ctx->pb);
2441 if (matroska_parse_cluster(matroska) < 0)
2442 ret = matroska_resync(matroska, pos);
2445 if (ret == AVERROR_INVALIDDATA && pkt->data) {
2446 pkt->flags |= AV_PKT_FLAG_CORRUPT;
2453 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2454 int64_t timestamp, int flags)
2456 MatroskaDemuxContext *matroska = s->priv_data;
2457 MatroskaTrack *tracks = matroska->tracks.elem;
2458 AVStream *st = s->streams[stream_index];
2459 int i, index, index_sub, index_min;
2461 /* Parse the CUES now since we need the index data to seek. */
2462 if (matroska->cues_parsing_deferred) {
2463 matroska_parse_cues(matroska);
2464 matroska->cues_parsing_deferred = 0;
2467 if (!st->nb_index_entries)
2469 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2471 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2472 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
2474 matroska->current_id = 0;
2475 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2476 matroska_clear_queue(matroska);
2477 if (matroska_parse_cluster(matroska) < 0)
2482 matroska_clear_queue(matroska);
2487 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2488 tracks[i].audio.pkt_cnt = 0;
2489 tracks[i].audio.sub_packet_cnt = 0;
2490 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2491 tracks[i].end_timecode = 0;
2492 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2493 !tracks[i].stream->discard != AVDISCARD_ALL) {
2494 index_sub = av_index_search_timestamp(
2495 tracks[i].stream, st->index_entries[index].timestamp,
2496 AVSEEK_FLAG_BACKWARD);
2497 if (index_sub >= 0 &&
2498 st->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
2499 st->index_entries[index].timestamp -
2500 st->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
2501 index_min = index_sub;
2505 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2506 matroska->current_id = 0;
2507 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2508 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2510 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2514 static int matroska_read_close(AVFormatContext *s)
2516 MatroskaDemuxContext *matroska = s->priv_data;
2517 MatroskaTrack *tracks = matroska->tracks.elem;
2520 matroska_clear_queue(matroska);
2522 for (n = 0; n < matroska->tracks.nb_elem; n++)
2523 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2524 av_free(tracks[n].audio.buf);
2525 ebml_free(matroska_cluster, &matroska->current_cluster);
2526 ebml_free(matroska_segment, matroska);
2531 AVInputFormat ff_matroska_demuxer = {
2532 .name = "matroska,webm",
2533 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2534 .priv_data_size = sizeof(MatroskaDemuxContext),
2535 .read_probe = matroska_probe,
2536 .read_header = matroska_read_header,
2537 .read_packet = matroska_read_packet,
2538 .read_close = matroska_read_close,
2539 .read_seek = matroska_read_seek,