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"
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/mpeg4audio.h"
52 #include "avio_internal.h"
56 /* For ff_codec_get_id(). */
73 typedef const struct EbmlSyntax {
82 const struct EbmlSyntax *n;
102 uint64_t doctype_version;
108 } MatroskaTrackCompression;
113 MatroskaTrackCompression compression;
114 } MatroskaTrackEncoding;
118 uint64_t display_width;
119 uint64_t display_height;
120 uint64_t pixel_width;
121 uint64_t pixel_height;
123 } MatroskaTrackVideo;
127 double out_samplerate;
131 /* real audio header (extracted from extradata) */
138 uint64_t buf_timecode;
140 } MatroskaTrackAudio;
151 uint64_t default_duration;
152 uint64_t flag_default;
153 uint64_t flag_forced;
154 MatroskaTrackVideo video;
155 MatroskaTrackAudio audio;
159 int64_t end_timecode;
170 } MatroskaAttachment;
208 MatroskaTagTarget target;
228 AVFormatContext *ctx;
232 MatroskaLevel levels[EBML_MAX_DEPTH];
240 EbmlList attachments;
246 /* byte position of the segment inside the stream */
247 int64_t segment_start;
249 /* the packet queue */
256 /* What to skip before effectively reading a packet. */
257 int skip_to_keyframe;
258 uint64_t skip_to_timecode;
260 /* File has a CUES element, but we defer parsing until it is needed. */
261 int cues_parsing_deferred;
263 int current_cluster_num_blocks;
264 int64_t current_cluster_pos;
265 MatroskaCluster current_cluster;
267 /* File has SSA subtitles which prevent incremental cluster parsing. */
269 } MatroskaDemuxContext;
278 static EbmlSyntax ebml_header[] = {
279 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
280 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
281 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
282 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
283 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
284 { EBML_ID_EBMLVERSION, EBML_NONE },
285 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
289 static EbmlSyntax ebml_syntax[] = {
290 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
294 static EbmlSyntax matroska_info[] = {
295 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
296 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
297 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
298 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
299 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
300 { MATROSKA_ID_DATEUTC, EBML_NONE },
301 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
305 static EbmlSyntax matroska_track_video[] = {
306 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
307 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width) },
308 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height) },
309 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
310 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
311 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, fourcc) },
312 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
313 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
314 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
315 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
316 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
317 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_NONE },
318 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE },
319 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
323 static EbmlSyntax matroska_track_audio[] = {
324 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
325 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
326 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
327 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
331 static EbmlSyntax matroska_track_encoding_compression[] = {
332 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
333 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
337 static EbmlSyntax matroska_track_encoding[] = {
338 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
339 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
340 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
341 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
345 static EbmlSyntax matroska_track_encodings[] = {
346 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
350 static EbmlSyntax matroska_track[] = {
351 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
352 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
353 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
354 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
355 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
356 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
357 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
358 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
359 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
360 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
361 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
362 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
363 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
364 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
365 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
366 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
367 { MATROSKA_ID_CODECNAME, EBML_NONE },
368 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
369 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
370 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
371 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
372 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
373 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
377 static EbmlSyntax matroska_tracks[] = {
378 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
382 static EbmlSyntax matroska_attachment[] = {
383 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
384 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
385 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
386 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
387 { MATROSKA_ID_FILEDESC, EBML_NONE },
391 static EbmlSyntax matroska_attachments[] = {
392 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
396 static EbmlSyntax matroska_chapter_display[] = {
397 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
398 { MATROSKA_ID_CHAPLANG, EBML_NONE },
402 static EbmlSyntax matroska_chapter_entry[] = {
403 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
404 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
405 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
406 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
407 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
408 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
409 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
410 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
414 static EbmlSyntax matroska_chapter[] = {
415 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
416 { MATROSKA_ID_EDITIONUID, EBML_NONE },
417 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
418 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
419 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
423 static EbmlSyntax matroska_chapters[] = {
424 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
428 static EbmlSyntax matroska_index_pos[] = {
429 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
430 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
431 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
435 static EbmlSyntax matroska_index_entry[] = {
436 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
437 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
441 static EbmlSyntax matroska_index[] = {
442 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
446 static EbmlSyntax matroska_simpletag[] = {
447 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
448 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
449 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
450 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
451 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
452 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
456 static EbmlSyntax matroska_tagtargets[] = {
457 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
458 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
459 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
460 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
461 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
465 static EbmlSyntax matroska_tag[] = {
466 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
467 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
471 static EbmlSyntax matroska_tags[] = {
472 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
476 static EbmlSyntax matroska_seekhead_entry[] = {
477 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
478 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
482 static EbmlSyntax matroska_seekhead[] = {
483 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
487 static EbmlSyntax matroska_segment[] = {
488 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, { .n = matroska_info } },
489 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, { .n = matroska_tracks } },
490 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, { .n = matroska_attachments } },
491 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, { .n = matroska_chapters } },
492 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, { .n = matroska_index } },
493 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, { .n = matroska_tags } },
494 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, { .n = matroska_seekhead } },
495 { MATROSKA_ID_CLUSTER, EBML_STOP },
499 static EbmlSyntax matroska_segments[] = {
500 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
504 static EbmlSyntax matroska_blockgroup[] = {
505 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
506 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
507 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration), { .u = AV_NOPTS_VALUE } },
508 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock, reference) },
509 { MATROSKA_ID_CODECSTATE, EBML_NONE },
510 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
514 static EbmlSyntax matroska_cluster[] = {
515 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
516 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
517 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
518 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
519 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
523 static EbmlSyntax matroska_clusters[] = {
524 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
525 { MATROSKA_ID_INFO, EBML_NONE },
526 { MATROSKA_ID_CUES, EBML_NONE },
527 { MATROSKA_ID_TAGS, EBML_NONE },
528 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
532 static EbmlSyntax matroska_cluster_incremental_parsing[] = {
533 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
534 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
535 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
536 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
537 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
538 { MATROSKA_ID_INFO, EBML_NONE },
539 { MATROSKA_ID_CUES, EBML_NONE },
540 { MATROSKA_ID_TAGS, EBML_NONE },
541 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
542 { MATROSKA_ID_CLUSTER, EBML_STOP },
546 static EbmlSyntax matroska_cluster_incremental[] = {
547 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
548 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
549 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
550 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
551 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
555 static EbmlSyntax matroska_clusters_incremental[] = {
556 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
557 { MATROSKA_ID_INFO, EBML_NONE },
558 { MATROSKA_ID_CUES, EBML_NONE },
559 { MATROSKA_ID_TAGS, EBML_NONE },
560 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
564 static const char *const matroska_doctypes[] = { "matroska", "webm" };
566 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
568 AVIOContext *pb = matroska->ctx->pb;
570 matroska->current_id = 0;
571 matroska->num_levels = 0;
573 /* seek to next position to resync from */
574 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
579 // try to find a toplevel element
580 while (!pb->eof_reached) {
581 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
582 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
583 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
584 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
585 matroska->current_id = id;
588 id = (id << 8) | avio_r8(pb);
597 * Return: Whether we reached the end of a level in the hierarchy or not.
599 static int ebml_level_end(MatroskaDemuxContext *matroska)
601 AVIOContext *pb = matroska->ctx->pb;
602 int64_t pos = avio_tell(pb);
604 if (matroska->num_levels > 0) {
605 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
606 if (pos - level->start >= level->length || matroska->current_id) {
607 matroska->num_levels--;
615 * Read: an "EBML number", which is defined as a variable-length
616 * array of bytes. The first byte indicates the length by giving a
617 * number of 0-bits followed by a one. The position of the first
618 * "one" bit inside the first byte indicates the length of this
620 * Returns: number of bytes read, < 0 on error
622 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
623 int max_size, uint64_t *number)
628 /* The first byte tells us the length in bytes - avio_r8() can normally
629 * return 0, but since that's not a valid first ebmlID byte, we can
630 * use it safely here to catch EOS. */
631 if (!(total = avio_r8(pb))) {
632 /* we might encounter EOS here */
633 if (!pb->eof_reached) {
634 int64_t pos = avio_tell(pb);
635 av_log(matroska->ctx, AV_LOG_ERROR,
636 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
638 return pb->error ? pb->error : AVERROR(EIO);
643 /* get the length of the EBML number */
644 read = 8 - ff_log2_tab[total];
645 if (read > max_size) {
646 int64_t pos = avio_tell(pb) - 1;
647 av_log(matroska->ctx, AV_LOG_ERROR,
648 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
649 (uint8_t) total, pos, pos);
650 return AVERROR_INVALIDDATA;
653 /* read out length */
654 total ^= 1 << ff_log2_tab[total];
656 total = (total << 8) | avio_r8(pb);
664 * Read a EBML length value.
665 * This needs special handling for the "unknown length" case which has multiple
668 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
671 int res = ebml_read_num(matroska, pb, 8, number);
672 if (res > 0 && *number + 1 == 1ULL << (7 * res))
673 *number = 0xffffffffffffffULL;
678 * Read the next element as an unsigned int.
679 * 0 is success, < 0 is failure.
681 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
686 return AVERROR_INVALIDDATA;
688 /* big-endian ordering; build up number */
691 *num = (*num << 8) | avio_r8(pb);
697 * Read the next element as a float.
698 * 0 is success, < 0 is failure.
700 static int ebml_read_float(AVIOContext *pb, int size, double *num)
705 *num = av_int2float(avio_rb32(pb));
707 *num = av_int2double(avio_rb64(pb));
709 return AVERROR_INVALIDDATA;
715 * Read the next element as an ASCII string.
716 * 0 is success, < 0 is failure.
718 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
722 /* EBML strings are usually not 0-terminated, so we allocate one
723 * byte more, read the string and NULL-terminate it ourselves. */
724 if (!(res = av_malloc(size + 1)))
725 return AVERROR(ENOMEM);
726 if (avio_read(pb, (uint8_t *) res, size) != size) {
738 * Read the next element as binary data.
739 * 0 is success, < 0 is failure.
741 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
744 if (!(bin->data = av_malloc(length + FF_INPUT_BUFFER_PADDING_SIZE)))
745 return AVERROR(ENOMEM);
747 memset(bin->data + length, 0, FF_INPUT_BUFFER_PADDING_SIZE);
750 bin->pos = avio_tell(pb);
751 if (avio_read(pb, bin->data, length) != length) {
752 av_freep(&bin->data);
760 * Read the next element, but only the header. The contents
761 * are supposed to be sub-elements which can be read separately.
762 * 0 is success, < 0 is failure.
764 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
766 AVIOContext *pb = matroska->ctx->pb;
767 MatroskaLevel *level;
769 if (matroska->num_levels >= EBML_MAX_DEPTH) {
770 av_log(matroska->ctx, AV_LOG_ERROR,
771 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
772 return AVERROR(ENOSYS);
775 level = &matroska->levels[matroska->num_levels++];
776 level->start = avio_tell(pb);
777 level->length = length;
783 * Read signed/unsigned "EBML" numbers.
784 * Return: number of bytes processed, < 0 on error
786 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
787 uint8_t *data, uint32_t size, uint64_t *num)
790 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
791 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
795 * Same as above, but signed.
797 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
798 uint8_t *data, uint32_t size, int64_t *num)
803 /* read as unsigned number first */
804 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
807 /* make signed (weird way) */
808 *num = unum - ((1LL << (7 * res - 1)) - 1);
813 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
814 EbmlSyntax *syntax, void *data);
816 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
817 uint32_t id, void *data)
820 for (i = 0; syntax[i].id; i++)
821 if (id == syntax[i].id)
823 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
824 matroska->num_levels > 0 &&
825 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
826 return 0; // we reached the end of an unknown size cluster
827 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
828 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%"PRIX32"\n", id);
829 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
830 return AVERROR_INVALIDDATA;
832 return ebml_parse_elem(matroska, &syntax[i], data);
835 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
838 if (!matroska->current_id) {
840 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
843 matroska->current_id = id | 1 << 7 * res;
845 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
848 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
853 for (i = 0; syntax[i].id; i++)
854 switch (syntax[i].type) {
856 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
859 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
863 // the default may be NULL
864 if (syntax[i].def.s) {
865 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
866 *dst = av_strdup(syntax[i].def.s);
868 return AVERROR(ENOMEM);
873 while (!res && !ebml_level_end(matroska))
874 res = ebml_parse(matroska, syntax, data);
879 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
880 EbmlSyntax *syntax, void *data)
882 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
885 // max. 16 MB for strings
886 [EBML_STR] = 0x1000000,
887 [EBML_UTF8] = 0x1000000,
888 // max. 256 MB for binary data
889 [EBML_BIN] = 0x10000000,
890 // no limits for anything else
892 AVIOContext *pb = matroska->ctx->pb;
893 uint32_t id = syntax->id;
897 data = (char *) data + syntax->data_offset;
898 if (syntax->list_elem_size) {
899 EbmlList *list = data;
900 if ((res = av_reallocp_array(&list->elem,
902 syntax->list_elem_size)) < 0) {
906 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
907 memset(data, 0, syntax->list_elem_size);
911 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
912 matroska->current_id = 0;
913 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
915 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
916 av_log(matroska->ctx, AV_LOG_ERROR,
917 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
918 length, max_lengths[syntax->type], syntax->type);
919 return AVERROR_INVALIDDATA;
923 switch (syntax->type) {
925 res = ebml_read_uint(pb, length, data);
928 res = ebml_read_float(pb, length, data);
932 res = ebml_read_ascii(pb, length, data);
935 res = ebml_read_binary(pb, length, data);
938 if ((res = ebml_read_master(matroska, length)) < 0)
940 if (id == MATROSKA_ID_SEGMENT)
941 matroska->segment_start = avio_tell(matroska->ctx->pb);
942 return ebml_parse_nest(matroska, syntax->def.n, data);
944 return ebml_parse_id(matroska, syntax->def.n, id, data);
948 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
950 if (res == AVERROR_INVALIDDATA)
951 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
952 else if (res == AVERROR(EIO))
953 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
957 static void ebml_free(EbmlSyntax *syntax, void *data)
960 for (i = 0; syntax[i].id; i++) {
961 void *data_off = (char *) data + syntax[i].data_offset;
962 switch (syntax[i].type) {
968 av_freep(&((EbmlBin *) data_off)->data);
971 if (syntax[i].list_elem_size) {
972 EbmlList *list = data_off;
973 char *ptr = list->elem;
974 for (j = 0; j < list->nb_elem;
975 j++, ptr += syntax[i].list_elem_size)
976 ebml_free(syntax[i].def.n, ptr);
979 ebml_free(syntax[i].def.n, data_off);
989 static int matroska_probe(AVProbeData *p)
992 int len_mask = 0x80, size = 1, n = 1, i;
995 if (AV_RB32(p->buf) != EBML_ID_HEADER)
998 /* length of header */
1000 while (size <= 8 && !(total & len_mask)) {
1006 total &= (len_mask - 1);
1008 total = (total << 8) | p->buf[4 + n++];
1010 /* Does the probe data contain the whole header? */
1011 if (p->buf_size < 4 + size + total)
1014 /* The header should contain a known document type. For now,
1015 * we don't parse the whole header but simply check for the
1016 * availability of that array of characters inside the header.
1017 * Not fully fool-proof, but good enough. */
1018 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1019 int probelen = strlen(matroska_doctypes[i]);
1020 if (total < probelen)
1022 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1023 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1024 return AVPROBE_SCORE_MAX;
1027 // probably valid EBML header but no recognized doctype
1028 return AVPROBE_SCORE_EXTENSION;
1031 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1034 MatroskaTrack *tracks = matroska->tracks.elem;
1037 for (i = 0; i < matroska->tracks.nb_elem; i++)
1038 if (tracks[i].num == num)
1041 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1045 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1046 MatroskaTrack *track)
1048 MatroskaTrackEncoding *encodings = track->encodings.elem;
1049 uint8_t *data = *buf;
1050 int isize = *buf_size;
1051 uint8_t *pkt_data = NULL;
1052 uint8_t av_unused *newpktdata;
1053 int pkt_size = isize;
1057 if (pkt_size >= 10000000)
1058 return AVERROR_INVALIDDATA;
1060 switch (encodings[0].compression.algo) {
1061 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1063 int header_size = encodings[0].compression.settings.size;
1064 uint8_t *header = encodings[0].compression.settings.data;
1069 pkt_size = isize + header_size;
1070 pkt_data = av_malloc(pkt_size);
1072 return AVERROR(ENOMEM);
1074 memcpy(pkt_data, header, header_size);
1075 memcpy(pkt_data + header_size, data, isize);
1079 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1081 olen = pkt_size *= 3;
1082 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1084 result = AVERROR(ENOMEM);
1087 pkt_data = newpktdata;
1088 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1089 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1091 result = AVERROR_INVALIDDATA;
1098 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1100 z_stream zstream = { 0 };
1101 if (inflateInit(&zstream) != Z_OK)
1103 zstream.next_in = data;
1104 zstream.avail_in = isize;
1107 newpktdata = av_realloc(pkt_data, pkt_size);
1109 inflateEnd(&zstream);
1112 pkt_data = newpktdata;
1113 zstream.avail_out = pkt_size - zstream.total_out;
1114 zstream.next_out = pkt_data + zstream.total_out;
1115 result = inflate(&zstream, Z_NO_FLUSH);
1116 } while (result == Z_OK && pkt_size < 10000000);
1117 pkt_size = zstream.total_out;
1118 inflateEnd(&zstream);
1119 if (result != Z_STREAM_END) {
1120 if (result == Z_MEM_ERROR)
1121 result = AVERROR(ENOMEM);
1123 result = AVERROR_INVALIDDATA;
1130 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1132 bz_stream bzstream = { 0 };
1133 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1135 bzstream.next_in = data;
1136 bzstream.avail_in = isize;
1139 newpktdata = av_realloc(pkt_data, pkt_size);
1141 BZ2_bzDecompressEnd(&bzstream);
1144 pkt_data = newpktdata;
1145 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1146 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1147 result = BZ2_bzDecompress(&bzstream);
1148 } while (result == BZ_OK && pkt_size < 10000000);
1149 pkt_size = bzstream.total_out_lo32;
1150 BZ2_bzDecompressEnd(&bzstream);
1151 if (result != BZ_STREAM_END) {
1152 if (result == BZ_MEM_ERROR)
1153 result = AVERROR(ENOMEM);
1155 result = AVERROR_INVALIDDATA;
1162 return AVERROR_INVALIDDATA;
1166 *buf_size = pkt_size;
1174 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1175 AVPacket *pkt, uint64_t display_duration)
1178 char *layer, *ptr = pkt->data, *end = ptr + pkt->size;
1180 for (; *ptr != ',' && ptr < end - 1; ptr++)
1184 for (; *ptr != ',' && ptr < end - 1; ptr++)
1187 int64_t end_pts = pkt->pts + display_duration;
1188 int sc = matroska->time_scale * pkt->pts / 10000000;
1189 int ec = matroska->time_scale * end_pts / 10000000;
1190 int sh, sm, ss, eh, em, es, len;
1204 len = 50 + end - ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1205 if (!(line = av_buffer_alloc(len)))
1207 snprintf(line->data, len,
1208 "Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1209 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1210 av_buffer_unref(&pkt->buf);
1212 pkt->data = line->data;
1213 pkt->size = strlen(line->data);
1217 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1219 int old_size = out->size;
1220 int ret = av_grow_packet(out, in->size);
1224 memcpy(out->data + old_size, in->data, in->size);
1231 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1232 AVDictionary **metadata, char *prefix)
1234 MatroskaTag *tags = list->elem;
1238 for (i = 0; i < list->nb_elem; i++) {
1239 const char *lang = tags[i].lang &&
1240 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1242 if (!tags[i].name) {
1243 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1247 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1249 av_strlcpy(key, tags[i].name, sizeof(key));
1250 if (tags[i].def || !lang) {
1251 av_dict_set(metadata, key, tags[i].string, 0);
1252 if (tags[i].sub.nb_elem)
1253 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1256 av_strlcat(key, "-", sizeof(key));
1257 av_strlcat(key, lang, sizeof(key));
1258 av_dict_set(metadata, key, tags[i].string, 0);
1259 if (tags[i].sub.nb_elem)
1260 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1263 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1266 static void matroska_convert_tags(AVFormatContext *s)
1268 MatroskaDemuxContext *matroska = s->priv_data;
1269 MatroskaTags *tags = matroska->tags.elem;
1272 for (i = 0; i < matroska->tags.nb_elem; i++) {
1273 if (tags[i].target.attachuid) {
1274 MatroskaAttachment *attachment = matroska->attachments.elem;
1275 for (j = 0; j < matroska->attachments.nb_elem; j++)
1276 if (attachment[j].uid == tags[i].target.attachuid &&
1277 attachment[j].stream)
1278 matroska_convert_tag(s, &tags[i].tag,
1279 &attachment[j].stream->metadata, NULL);
1280 } else if (tags[i].target.chapteruid) {
1281 MatroskaChapter *chapter = matroska->chapters.elem;
1282 for (j = 0; j < matroska->chapters.nb_elem; j++)
1283 if (chapter[j].uid == tags[i].target.chapteruid &&
1285 matroska_convert_tag(s, &tags[i].tag,
1286 &chapter[j].chapter->metadata, NULL);
1287 } else if (tags[i].target.trackuid) {
1288 MatroskaTrack *track = matroska->tracks.elem;
1289 for (j = 0; j < matroska->tracks.nb_elem; j++)
1290 if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1291 matroska_convert_tag(s, &tags[i].tag,
1292 &track[j].stream->metadata, NULL);
1294 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1295 tags[i].target.type);
1300 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1303 EbmlList *seekhead_list = &matroska->seekhead;
1304 uint32_t level_up = matroska->level_up;
1305 uint32_t saved_id = matroska->current_id;
1306 MatroskaSeekhead *seekhead = seekhead_list->elem;
1307 int64_t before_pos = avio_tell(matroska->ctx->pb);
1308 MatroskaLevel level;
1312 if (idx >= seekhead_list->nb_elem ||
1313 seekhead[idx].id == MATROSKA_ID_SEEKHEAD ||
1314 seekhead[idx].id == MATROSKA_ID_CLUSTER)
1318 offset = seekhead[idx].pos + matroska->segment_start;
1319 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1320 /* We don't want to lose our seekhead level, so we add
1321 * a dummy. This is a crude hack. */
1322 if (matroska->num_levels == EBML_MAX_DEPTH) {
1323 av_log(matroska->ctx, AV_LOG_INFO,
1324 "Max EBML element depth (%d) reached, "
1325 "cannot parse further.\n", EBML_MAX_DEPTH);
1326 ret = AVERROR_INVALIDDATA;
1329 level.length = (uint64_t) -1;
1330 matroska->levels[matroska->num_levels] = level;
1331 matroska->num_levels++;
1332 matroska->current_id = 0;
1334 ret = ebml_parse(matroska, matroska_segment, matroska);
1336 /* remove dummy level */
1337 while (matroska->num_levels) {
1338 uint64_t length = matroska->levels[--matroska->num_levels].length;
1339 if (length == (uint64_t) -1)
1345 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1346 matroska->level_up = level_up;
1347 matroska->current_id = saved_id;
1352 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1354 EbmlList *seekhead_list = &matroska->seekhead;
1355 int64_t before_pos = avio_tell(matroska->ctx->pb);
1358 // we should not do any seeking in the streaming case
1359 if (!matroska->ctx->pb->seekable ||
1360 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1363 for (i = 0; i < seekhead_list->nb_elem; i++) {
1364 MatroskaSeekhead *seekhead = seekhead_list->elem;
1365 if (seekhead[i].pos <= before_pos)
1368 // defer cues parsing until we actually need cue data.
1369 if (seekhead[i].id == MATROSKA_ID_CUES) {
1370 matroska->cues_parsing_deferred = 1;
1374 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1379 static void matroska_parse_cues(MatroskaDemuxContext *matroska)
1381 EbmlList *seekhead_list = &matroska->seekhead;
1382 MatroskaSeekhead *seekhead = seekhead_list->elem;
1383 EbmlList *index_list;
1384 MatroskaIndex *index;
1385 int index_scale = 1;
1388 for (i = 0; i < seekhead_list->nb_elem; i++)
1389 if (seekhead[i].id == MATROSKA_ID_CUES)
1391 assert(i <= seekhead_list->nb_elem);
1393 matroska_parse_seekhead_entry(matroska, i);
1395 index_list = &matroska->index;
1396 index = index_list->elem;
1397 if (index_list->nb_elem &&
1398 index[0].time > 1E14 / matroska->time_scale) {
1399 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1400 index_scale = matroska->time_scale;
1402 for (i = 0; i < index_list->nb_elem; i++) {
1403 EbmlList *pos_list = &index[i].pos;
1404 MatroskaIndexPos *pos = pos_list->elem;
1405 for (j = 0; j < pos_list->nb_elem; j++) {
1406 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1408 if (track && track->stream)
1409 av_add_index_entry(track->stream,
1410 pos[j].pos + matroska->segment_start,
1411 index[i].time / index_scale, 0, 0,
1417 static int matroska_aac_profile(char *codec_id)
1419 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1422 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1423 if (strstr(codec_id, aac_profiles[profile]))
1428 static int matroska_aac_sri(int samplerate)
1432 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1433 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1438 static int matroska_read_header(AVFormatContext *s)
1440 MatroskaDemuxContext *matroska = s->priv_data;
1441 EbmlList *attachments_list = &matroska->attachments;
1442 EbmlList *chapters_list = &matroska->chapters;
1443 MatroskaAttachment *attachments;
1444 MatroskaChapter *chapters;
1445 MatroskaTrack *tracks;
1446 uint64_t max_start = 0;
1454 /* First read the EBML header. */
1455 if (ebml_parse(matroska, ebml_syntax, &ebml) ||
1456 ebml.version > EBML_VERSION ||
1457 ebml.max_size > sizeof(uint64_t) ||
1458 ebml.id_length > sizeof(uint32_t) ||
1459 ebml.doctype_version > 2) {
1460 av_log(matroska->ctx, AV_LOG_ERROR,
1461 "EBML header using unsupported features\n"
1462 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1463 ebml.version, ebml.doctype, ebml.doctype_version);
1464 ebml_free(ebml_syntax, &ebml);
1465 return AVERROR_PATCHWELCOME;
1467 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1468 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1470 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1471 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1472 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1473 ebml_free(ebml_syntax, &ebml);
1474 return AVERROR_INVALIDDATA;
1477 ebml_free(ebml_syntax, &ebml);
1479 /* The next thing is a segment. */
1480 pos = avio_tell(matroska->ctx->pb);
1481 res = ebml_parse(matroska, matroska_segments, matroska);
1482 // try resyncing until we find a EBML_STOP type element.
1484 res = matroska_resync(matroska, pos);
1487 pos = avio_tell(matroska->ctx->pb);
1488 res = ebml_parse(matroska, matroska_segment, matroska);
1490 matroska_execute_seekhead(matroska);
1492 if (!matroska->time_scale)
1493 matroska->time_scale = 1000000;
1494 if (matroska->duration)
1495 matroska->ctx->duration = matroska->duration * matroska->time_scale *
1496 1000 / AV_TIME_BASE;
1497 av_dict_set(&s->metadata, "title", matroska->title, 0);
1499 tracks = matroska->tracks.elem;
1500 for (i = 0; i < matroska->tracks.nb_elem; i++) {
1501 MatroskaTrack *track = &tracks[i];
1502 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1503 EbmlList *encodings_list = &track->encodings;
1504 MatroskaTrackEncoding *encodings = encodings_list->elem;
1505 uint8_t *extradata = NULL;
1506 int extradata_size = 0;
1507 int extradata_offset = 0;
1510 /* Apply some sanity checks. */
1511 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1512 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1513 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1514 av_log(matroska->ctx, AV_LOG_INFO,
1515 "Unknown or unsupported track type %"PRIu64"\n",
1519 if (track->codec_id == NULL)
1522 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1523 if (!track->default_duration && track->video.frame_rate > 0)
1524 track->default_duration = 1000000000 / track->video.frame_rate;
1525 if (!track->video.display_width)
1526 track->video.display_width = track->video.pixel_width;
1527 if (!track->video.display_height)
1528 track->video.display_height = track->video.pixel_height;
1529 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1530 if (!track->audio.out_samplerate)
1531 track->audio.out_samplerate = track->audio.samplerate;
1533 if (encodings_list->nb_elem > 1) {
1534 av_log(matroska->ctx, AV_LOG_ERROR,
1535 "Multiple combined encodings not supported");
1536 } else if (encodings_list->nb_elem == 1) {
1537 if (encodings[0].type ||
1540 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1543 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1546 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1548 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP)) {
1549 encodings[0].scope = 0;
1550 av_log(matroska->ctx, AV_LOG_ERROR,
1551 "Unsupported encoding type");
1552 } else if (track->codec_priv.size && encodings[0].scope & 2) {
1553 uint8_t *codec_priv = track->codec_priv.data;
1554 int ret = matroska_decode_buffer(&track->codec_priv.data,
1555 &track->codec_priv.size,
1558 track->codec_priv.data = NULL;
1559 track->codec_priv.size = 0;
1560 av_log(matroska->ctx, AV_LOG_ERROR,
1561 "Failed to decode codec private data\n");
1564 if (codec_priv != track->codec_priv.data)
1565 av_free(codec_priv);
1569 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1570 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1571 strlen(ff_mkv_codec_tags[j].str))) {
1572 codec_id = ff_mkv_codec_tags[j].id;
1577 st = track->stream = avformat_new_stream(s, NULL);
1579 return AVERROR(ENOMEM);
1581 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1582 track->codec_priv.size >= 40 &&
1583 track->codec_priv.data != NULL) {
1584 track->ms_compat = 1;
1585 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1586 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
1587 track->video.fourcc);
1588 extradata_offset = 40;
1589 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1590 track->codec_priv.size >= 14 &&
1591 track->codec_priv.data != NULL) {
1593 ffio_init_context(&b, track->codec_priv.data,
1594 track->codec_priv.size,
1595 0, NULL, NULL, NULL, NULL);
1596 ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1599 codec_id = st->codec->codec_id;
1600 extradata_offset = FFMIN(track->codec_priv.size, 18);
1601 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1602 (track->codec_priv.size >= 86) &&
1603 (track->codec_priv.data != NULL)) {
1604 track->video.fourcc = AV_RL32(track->codec_priv.data);
1605 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
1606 track->video.fourcc);
1607 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1608 switch (track->audio.bitdepth) {
1610 codec_id = AV_CODEC_ID_PCM_U8;
1613 codec_id = AV_CODEC_ID_PCM_S24BE;
1616 codec_id = AV_CODEC_ID_PCM_S32BE;
1619 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1620 switch (track->audio.bitdepth) {
1622 codec_id = AV_CODEC_ID_PCM_U8;
1625 codec_id = AV_CODEC_ID_PCM_S24LE;
1628 codec_id = AV_CODEC_ID_PCM_S32LE;
1631 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1632 track->audio.bitdepth == 64) {
1633 codec_id = AV_CODEC_ID_PCM_F64LE;
1634 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1635 int profile = matroska_aac_profile(track->codec_id);
1636 int sri = matroska_aac_sri(track->audio.samplerate);
1637 extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1638 if (extradata == NULL)
1639 return AVERROR(ENOMEM);
1640 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1641 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1642 if (strstr(track->codec_id, "SBR")) {
1643 sri = matroska_aac_sri(track->audio.out_samplerate);
1644 extradata[2] = 0x56;
1645 extradata[3] = 0xE5;
1646 extradata[4] = 0x80 | (sri << 3);
1650 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1651 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1652 * Create the "atom size", "tag", and "tag version" fields the
1653 * decoder expects manually. */
1654 extradata_size = 12 + track->codec_priv.size;
1655 extradata = av_mallocz(extradata_size +
1656 FF_INPUT_BUFFER_PADDING_SIZE);
1657 if (extradata == NULL)
1658 return AVERROR(ENOMEM);
1659 AV_WB32(extradata, extradata_size);
1660 memcpy(&extradata[4], "alac", 4);
1661 AV_WB32(&extradata[8], 0);
1662 memcpy(&extradata[12], track->codec_priv.data,
1663 track->codec_priv.size);
1664 } else if (codec_id == AV_CODEC_ID_TTA) {
1665 extradata_size = 30;
1666 extradata = av_mallocz(extradata_size);
1667 if (extradata == NULL)
1668 return AVERROR(ENOMEM);
1669 ffio_init_context(&b, extradata, extradata_size, 1,
1670 NULL, NULL, NULL, NULL);
1671 avio_write(&b, "TTA1", 4);
1673 avio_wl16(&b, track->audio.channels);
1674 avio_wl16(&b, track->audio.bitdepth);
1675 avio_wl32(&b, track->audio.out_samplerate);
1676 avio_wl32(&b, matroska->ctx->duration *
1677 track->audio.out_samplerate);
1678 } else if (codec_id == AV_CODEC_ID_RV10 ||
1679 codec_id == AV_CODEC_ID_RV20 ||
1680 codec_id == AV_CODEC_ID_RV30 ||
1681 codec_id == AV_CODEC_ID_RV40) {
1682 extradata_offset = 26;
1683 } else if (codec_id == AV_CODEC_ID_RA_144) {
1684 track->audio.out_samplerate = 8000;
1685 track->audio.channels = 1;
1686 } else if (codec_id == AV_CODEC_ID_RA_288 ||
1687 codec_id == AV_CODEC_ID_COOK ||
1688 codec_id == AV_CODEC_ID_ATRAC3 ||
1689 codec_id == AV_CODEC_ID_SIPR) {
1691 ffio_init_context(&b, track->codec_priv.data,
1692 track->codec_priv.size,
1693 0, NULL, NULL, NULL, NULL);
1695 flavor = avio_rb16(&b);
1696 track->audio.coded_framesize = avio_rb32(&b);
1698 track->audio.sub_packet_h = avio_rb16(&b);
1699 track->audio.frame_size = avio_rb16(&b);
1700 track->audio.sub_packet_size = avio_rb16(&b);
1702 track->audio.coded_framesize <= 0 ||
1703 track->audio.sub_packet_h <= 0 ||
1704 track->audio.frame_size <= 0 ||
1705 track->audio.sub_packet_size <= 0)
1706 return AVERROR_INVALIDDATA;
1707 track->audio.buf = av_malloc(track->audio.frame_size *
1708 track->audio.sub_packet_h);
1709 if (codec_id == AV_CODEC_ID_RA_288) {
1710 st->codec->block_align = track->audio.coded_framesize;
1711 track->codec_priv.size = 0;
1713 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1714 const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1715 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1716 st->codec->bit_rate = sipr_bit_rate[flavor];
1718 st->codec->block_align = track->audio.sub_packet_size;
1719 extradata_offset = 78;
1722 track->codec_priv.size -= extradata_offset;
1724 if (codec_id == AV_CODEC_ID_NONE)
1725 av_log(matroska->ctx, AV_LOG_INFO,
1726 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1728 if (track->time_scale < 0.01)
1729 track->time_scale = 1.0;
1730 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1731 1000 * 1000 * 1000); /* 64 bit pts in ns */
1733 st->codec->codec_id = codec_id;
1735 if (strcmp(track->language, "und"))
1736 av_dict_set(&st->metadata, "language", track->language, 0);
1737 av_dict_set(&st->metadata, "title", track->name, 0);
1739 if (track->flag_default)
1740 st->disposition |= AV_DISPOSITION_DEFAULT;
1741 if (track->flag_forced)
1742 st->disposition |= AV_DISPOSITION_FORCED;
1744 if (!st->codec->extradata) {
1746 st->codec->extradata = extradata;
1747 st->codec->extradata_size = extradata_size;
1748 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1749 st->codec->extradata = av_mallocz(track->codec_priv.size +
1750 FF_INPUT_BUFFER_PADDING_SIZE);
1751 if (st->codec->extradata == NULL)
1752 return AVERROR(ENOMEM);
1753 st->codec->extradata_size = track->codec_priv.size;
1754 memcpy(st->codec->extradata,
1755 track->codec_priv.data + extradata_offset,
1756 track->codec_priv.size);
1760 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1761 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1762 st->codec->codec_tag = track->video.fourcc;
1763 st->codec->width = track->video.pixel_width;
1764 st->codec->height = track->video.pixel_height;
1765 av_reduce(&st->sample_aspect_ratio.num,
1766 &st->sample_aspect_ratio.den,
1767 st->codec->height * track->video.display_width,
1768 st->codec->width * track->video.display_height,
1770 if (st->codec->codec_id != AV_CODEC_ID_H264 &&
1771 st->codec->codec_id != AV_CODEC_ID_HEVC)
1772 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1773 if (track->default_duration) {
1774 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1775 1000000000, track->default_duration, 30000);
1777 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1778 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1779 st->codec->sample_rate = track->audio.out_samplerate;
1780 st->codec->channels = track->audio.channels;
1781 if (st->codec->codec_id != AV_CODEC_ID_AAC)
1782 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1783 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1784 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1785 if (st->codec->codec_id == AV_CODEC_ID_SSA)
1786 matroska->contains_ssa = 1;
1790 attachments = attachments_list->elem;
1791 for (j = 0; j < attachments_list->nb_elem; j++) {
1792 if (!(attachments[j].filename && attachments[j].mime &&
1793 attachments[j].bin.data && attachments[j].bin.size > 0)) {
1794 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1796 AVStream *st = avformat_new_stream(s, NULL);
1799 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
1800 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
1801 st->codec->codec_id = AV_CODEC_ID_NONE;
1802 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
1803 st->codec->extradata = av_malloc(attachments[j].bin.size);
1804 if (st->codec->extradata == NULL)
1806 st->codec->extradata_size = attachments[j].bin.size;
1807 memcpy(st->codec->extradata, attachments[j].bin.data,
1808 attachments[j].bin.size);
1810 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1811 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
1812 strlen(ff_mkv_mime_tags[i].str))) {
1813 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1817 attachments[j].stream = st;
1821 chapters = chapters_list->elem;
1822 for (i = 0; i < chapters_list->nb_elem; i++)
1823 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
1824 (max_start == 0 || chapters[i].start > max_start)) {
1825 chapters[i].chapter =
1826 avpriv_new_chapter(s, chapters[i].uid,
1827 (AVRational) { 1, 1000000000 },
1828 chapters[i].start, chapters[i].end,
1830 av_dict_set(&chapters[i].chapter->metadata,
1831 "title", chapters[i].title, 0);
1832 max_start = chapters[i].start;
1835 matroska_convert_tags(s);
1841 * Put one packet in an application-supplied AVPacket struct.
1842 * Returns 0 on success or -1 on failure.
1844 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1847 if (matroska->num_packets > 0) {
1848 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1849 av_free(matroska->packets[0]);
1850 if (matroska->num_packets > 1) {
1852 memmove(&matroska->packets[0], &matroska->packets[1],
1853 (matroska->num_packets - 1) * sizeof(AVPacket *));
1854 newpackets = av_realloc(matroska->packets,
1855 (matroska->num_packets - 1) *
1856 sizeof(AVPacket *));
1858 matroska->packets = newpackets;
1860 av_freep(&matroska->packets);
1861 matroska->prev_pkt = NULL;
1863 matroska->num_packets--;
1871 * Free all packets in our internal queue.
1873 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1875 matroska->prev_pkt = NULL;
1876 if (matroska->packets) {
1878 for (n = 0; n < matroska->num_packets; n++) {
1879 av_free_packet(matroska->packets[n]);
1880 av_free(matroska->packets[n]);
1882 av_freep(&matroska->packets);
1883 matroska->num_packets = 0;
1887 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
1888 int *buf_size, int type,
1889 uint32_t **lace_buf, int *laces)
1891 int res = 0, n, size = *buf_size;
1892 uint8_t *data = *buf;
1893 uint32_t *lace_size;
1897 *lace_buf = av_mallocz(sizeof(int));
1899 return AVERROR(ENOMEM);
1901 *lace_buf[0] = size;
1909 lace_size = av_mallocz(*laces * sizeof(int));
1911 return AVERROR(ENOMEM);
1914 case 0x1: /* Xiph lacing */
1918 for (n = 0; res == 0 && n < *laces - 1; n++) {
1925 lace_size[n] += temp;
1931 total += lace_size[n];
1933 if (size <= total) {
1934 res = AVERROR_INVALIDDATA;
1938 lace_size[n] = size - total;
1942 case 0x2: /* fixed-size lacing */
1943 if (size % (*laces)) {
1944 res = AVERROR_INVALIDDATA;
1947 for (n = 0; n < *laces; n++)
1948 lace_size[n] = size / *laces;
1951 case 0x3: /* EBML lacing */
1955 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1957 av_log(matroska->ctx, AV_LOG_INFO,
1958 "EBML block data error\n");
1964 total = lace_size[0] = num;
1965 for (n = 1; res == 0 && n < *laces - 1; n++) {
1968 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1970 av_log(matroska->ctx, AV_LOG_INFO,
1971 "EBML block data error\n");
1977 lace_size[n] = lace_size[n - 1] + snum;
1978 total += lace_size[n];
1980 if (size <= total) {
1981 res = AVERROR_INVALIDDATA;
1984 lace_size[*laces - 1] = size - total;
1990 *lace_buf = lace_size;
1996 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
1997 MatroskaTrack *track, AVStream *st,
1998 uint8_t *data, int size, uint64_t timecode,
1999 uint64_t duration, int64_t pos)
2001 int a = st->codec->block_align;
2002 int sps = track->audio.sub_packet_size;
2003 int cfs = track->audio.coded_framesize;
2004 int h = track->audio.sub_packet_h;
2005 int y = track->audio.sub_packet_cnt;
2006 int w = track->audio.frame_size;
2009 if (!track->audio.pkt_cnt) {
2010 if (track->audio.sub_packet_cnt == 0)
2011 track->audio.buf_timecode = timecode;
2012 if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2013 if (size < cfs * h / 2) {
2014 av_log(matroska->ctx, AV_LOG_ERROR,
2015 "Corrupt int4 RM-style audio packet size\n");
2016 return AVERROR_INVALIDDATA;
2018 for (x = 0; x < h / 2; x++)
2019 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2020 data + x * cfs, cfs);
2021 } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2023 av_log(matroska->ctx, AV_LOG_ERROR,
2024 "Corrupt sipr RM-style audio packet size\n");
2025 return AVERROR_INVALIDDATA;
2027 memcpy(track->audio.buf + y * w, data, w);
2029 if (size < sps * w / sps) {
2030 av_log(matroska->ctx, AV_LOG_ERROR,
2031 "Corrupt generic RM-style audio packet size\n");
2032 return AVERROR_INVALIDDATA;
2034 for (x = 0; x < w / sps; x++)
2035 memcpy(track->audio.buf +
2036 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2037 data + x * sps, sps);
2040 if (++track->audio.sub_packet_cnt >= h) {
2041 if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2042 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2043 track->audio.sub_packet_cnt = 0;
2044 track->audio.pkt_cnt = h * w / a;
2048 while (track->audio.pkt_cnt) {
2049 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2050 av_new_packet(pkt, a);
2052 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2054 pkt->pts = track->audio.buf_timecode;
2055 track->audio.buf_timecode = AV_NOPTS_VALUE;
2057 pkt->stream_index = st->index;
2058 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2064 /* reconstruct full wavpack blocks from mangled matroska ones */
2065 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2066 uint8_t **pdst, int *size)
2068 uint8_t *dst = NULL;
2073 int ret, offset = 0;
2075 if (srclen < 12 || track->stream->codec->extradata_size < 2)
2076 return AVERROR_INVALIDDATA;
2078 ver = AV_RL16(track->stream->codec->extradata);
2080 samples = AV_RL32(src);
2084 while (srclen >= 8) {
2089 uint32_t flags = AV_RL32(src);
2090 uint32_t crc = AV_RL32(src + 4);
2094 multiblock = (flags & 0x1800) != 0x1800;
2097 ret = AVERROR_INVALIDDATA;
2100 blocksize = AV_RL32(src);
2106 if (blocksize > srclen) {
2107 ret = AVERROR_INVALIDDATA;
2111 tmp = av_realloc(dst, dstlen + blocksize + 32);
2113 ret = AVERROR(ENOMEM);
2117 dstlen += blocksize + 32;
2119 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2120 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2121 AV_WL16(dst + offset + 8, ver); // version
2122 AV_WL16(dst + offset + 10, 0); // track/index_no
2123 AV_WL32(dst + offset + 12, 0); // total samples
2124 AV_WL32(dst + offset + 16, 0); // block index
2125 AV_WL32(dst + offset + 20, samples); // number of samples
2126 AV_WL32(dst + offset + 24, flags); // flags
2127 AV_WL32(dst + offset + 28, crc); // crc
2128 memcpy(dst + offset + 32, src, blocksize); // block data
2131 srclen -= blocksize;
2132 offset += blocksize + 32;
2145 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2146 MatroskaTrack *track, AVStream *st,
2147 uint8_t *data, int pkt_size,
2148 uint64_t timecode, uint64_t duration,
2149 int64_t pos, int is_keyframe)
2151 MatroskaTrackEncoding *encodings = track->encodings.elem;
2152 uint8_t *pkt_data = data;
2153 int offset = 0, res;
2156 if (encodings && encodings->scope & 1) {
2157 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2162 if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2164 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2166 av_log(matroska->ctx, AV_LOG_ERROR,
2167 "Error parsing a wavpack block.\n");
2170 if (pkt_data != data)
2171 av_freep(&pkt_data);
2175 if (st->codec->codec_id == AV_CODEC_ID_PRORES)
2178 pkt = av_mallocz(sizeof(AVPacket));
2179 /* XXX: prevent data copy... */
2180 if (av_new_packet(pkt, pkt_size + offset) < 0) {
2182 return AVERROR(ENOMEM);
2185 if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
2186 uint8_t *buf = pkt->data;
2187 bytestream_put_be32(&buf, pkt_size);
2188 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2191 memcpy(pkt->data + offset, pkt_data, pkt_size);
2193 if (pkt_data != data)
2196 pkt->flags = is_keyframe;
2197 pkt->stream_index = st->index;
2199 if (track->ms_compat)
2200 pkt->dts = timecode;
2202 pkt->pts = timecode;
2204 if (st->codec->codec_id == AV_CODEC_ID_TEXT)
2205 pkt->convergence_duration = duration;
2206 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
2207 pkt->duration = duration;
2209 if (st->codec->codec_id == AV_CODEC_ID_SSA)
2210 matroska_fix_ass_packet(matroska, pkt, duration);
2212 if (matroska->prev_pkt &&
2213 timecode != AV_NOPTS_VALUE &&
2214 matroska->prev_pkt->pts == timecode &&
2215 matroska->prev_pkt->stream_index == st->index &&
2216 st->codec->codec_id == AV_CODEC_ID_SSA)
2217 matroska_merge_packets(matroska->prev_pkt, pkt);
2219 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2220 matroska->prev_pkt = pkt;
2226 if (pkt_data != data)
2227 av_freep(&pkt_data);
2231 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2232 int size, int64_t pos, uint64_t cluster_time,
2233 uint64_t block_duration, int is_keyframe,
2234 int64_t cluster_pos)
2236 uint64_t timecode = AV_NOPTS_VALUE;
2237 MatroskaTrack *track;
2241 uint32_t *lace_size = NULL;
2242 int n, flags, laces = 0;
2243 uint64_t num, duration;
2245 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2246 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2252 track = matroska_find_track_by_num(matroska, num);
2253 if (!track || !track->stream) {
2254 av_log(matroska->ctx, AV_LOG_INFO,
2255 "Invalid stream %"PRIu64" or size %u\n", num, size);
2256 return AVERROR_INVALIDDATA;
2257 } else if (size <= 3)
2260 if (st->discard >= AVDISCARD_ALL)
2263 block_time = AV_RB16(data);
2267 if (is_keyframe == -1)
2268 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2270 if (cluster_time != (uint64_t) -1 &&
2271 (block_time >= 0 || cluster_time >= -block_time)) {
2272 timecode = cluster_time + block_time;
2273 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2274 timecode < track->end_timecode)
2275 is_keyframe = 0; /* overlapping subtitles are not key frame */
2277 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2281 if (matroska->skip_to_keyframe &&
2282 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2283 if (!is_keyframe || timecode < matroska->skip_to_timecode)
2285 matroska->skip_to_keyframe = 0;
2288 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2289 &lace_size, &laces);
2294 if (block_duration != AV_NOPTS_VALUE) {
2295 duration = block_duration / laces;
2296 if (block_duration != duration * laces) {
2297 av_log(matroska->ctx, AV_LOG_WARNING,
2298 "Incorrect block_duration, possibly corrupted container");
2301 duration = track->default_duration / matroska->time_scale;
2302 block_duration = duration * laces;
2305 if (timecode != AV_NOPTS_VALUE)
2306 track->end_timecode =
2307 FFMAX(track->end_timecode, timecode + block_duration);
2309 for (n = 0; n < laces; n++) {
2310 if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2311 st->codec->codec_id == AV_CODEC_ID_COOK ||
2312 st->codec->codec_id == AV_CODEC_ID_SIPR ||
2313 st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2314 st->codec->block_align && track->audio.sub_packet_size) {
2315 res = matroska_parse_rm_audio(matroska, track, st, data,
2317 timecode, duration, pos);
2321 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2322 timecode, duration, pos,
2323 !n ? is_keyframe : 0);
2328 if (timecode != AV_NOPTS_VALUE)
2329 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2330 data += lace_size[n];
2338 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2340 EbmlList *blocks_list;
2341 MatroskaBlock *blocks;
2343 res = ebml_parse(matroska,
2344 matroska_cluster_incremental_parsing,
2345 &matroska->current_cluster);
2348 if (matroska->current_cluster_pos)
2349 ebml_level_end(matroska);
2350 ebml_free(matroska_cluster, &matroska->current_cluster);
2351 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2352 matroska->current_cluster_num_blocks = 0;
2353 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2354 matroska->prev_pkt = NULL;
2355 /* sizeof the ID which was already read */
2356 if (matroska->current_id)
2357 matroska->current_cluster_pos -= 4;
2358 res = ebml_parse(matroska,
2359 matroska_clusters_incremental,
2360 &matroska->current_cluster);
2361 /* Try parsing the block again. */
2363 res = ebml_parse(matroska,
2364 matroska_cluster_incremental_parsing,
2365 &matroska->current_cluster);
2369 matroska->current_cluster_num_blocks <
2370 matroska->current_cluster.blocks.nb_elem) {
2371 blocks_list = &matroska->current_cluster.blocks;
2372 blocks = blocks_list->elem;
2374 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2375 i = blocks_list->nb_elem - 1;
2376 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2377 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2378 if (!blocks[i].non_simple)
2379 blocks[i].duration = AV_NOPTS_VALUE;
2380 res = matroska_parse_block(matroska, blocks[i].bin.data,
2381 blocks[i].bin.size, blocks[i].bin.pos,
2382 matroska->current_cluster.timecode,
2383 blocks[i].duration, is_keyframe,
2384 matroska->current_cluster_pos);
2393 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2395 MatroskaCluster cluster = { 0 };
2396 EbmlList *blocks_list;
2397 MatroskaBlock *blocks;
2401 if (!matroska->contains_ssa)
2402 return matroska_parse_cluster_incremental(matroska);
2403 pos = avio_tell(matroska->ctx->pb);
2404 matroska->prev_pkt = NULL;
2405 if (matroska->current_id)
2406 pos -= 4; /* sizeof the ID which was already read */
2407 res = ebml_parse(matroska, matroska_clusters, &cluster);
2408 blocks_list = &cluster.blocks;
2409 blocks = blocks_list->elem;
2410 for (i = 0; i < blocks_list->nb_elem && !res; i++)
2411 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2412 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2413 if (!blocks[i].non_simple)
2414 blocks[i].duration = AV_NOPTS_VALUE;
2415 res = matroska_parse_block(matroska, blocks[i].bin.data,
2416 blocks[i].bin.size, blocks[i].bin.pos,
2417 cluster.timecode, blocks[i].duration,
2420 ebml_free(matroska_cluster, &cluster);
2424 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2426 MatroskaDemuxContext *matroska = s->priv_data;
2429 while (!ret && matroska_deliver_packet(matroska, pkt)) {
2430 int64_t pos = avio_tell(matroska->ctx->pb);
2433 if (matroska_parse_cluster(matroska) < 0)
2434 ret = matroska_resync(matroska, pos);
2437 if (ret == AVERROR_INVALIDDATA && pkt->data) {
2438 pkt->flags |= AV_PKT_FLAG_CORRUPT;
2445 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2446 int64_t timestamp, int flags)
2448 MatroskaDemuxContext *matroska = s->priv_data;
2449 MatroskaTrack *tracks = matroska->tracks.elem;
2450 AVStream *st = s->streams[stream_index];
2451 int i, index, index_sub, index_min;
2453 /* Parse the CUES now since we need the index data to seek. */
2454 if (matroska->cues_parsing_deferred) {
2455 matroska_parse_cues(matroska);
2456 matroska->cues_parsing_deferred = 0;
2459 if (!st->nb_index_entries)
2461 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2463 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2464 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
2466 matroska->current_id = 0;
2467 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2468 matroska_clear_queue(matroska);
2469 if (matroska_parse_cluster(matroska) < 0)
2474 matroska_clear_queue(matroska);
2479 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2480 tracks[i].audio.pkt_cnt = 0;
2481 tracks[i].audio.sub_packet_cnt = 0;
2482 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2483 tracks[i].end_timecode = 0;
2484 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2485 !tracks[i].stream->discard != AVDISCARD_ALL) {
2486 index_sub = av_index_search_timestamp(
2487 tracks[i].stream, st->index_entries[index].timestamp,
2488 AVSEEK_FLAG_BACKWARD);
2489 if (index_sub >= 0 &&
2490 st->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
2491 st->index_entries[index].timestamp -
2492 st->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
2493 index_min = index_sub;
2497 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2498 matroska->current_id = 0;
2499 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2500 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2502 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2506 static int matroska_read_close(AVFormatContext *s)
2508 MatroskaDemuxContext *matroska = s->priv_data;
2509 MatroskaTrack *tracks = matroska->tracks.elem;
2512 matroska_clear_queue(matroska);
2514 for (n = 0; n < matroska->tracks.nb_elem; n++)
2515 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2516 av_free(tracks[n].audio.buf);
2517 ebml_free(matroska_cluster, &matroska->current_cluster);
2518 ebml_free(matroska_segment, matroska);
2523 AVInputFormat ff_matroska_demuxer = {
2524 .name = "matroska,webm",
2525 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2526 .priv_data_size = sizeof(MatroskaDemuxContext),
2527 .read_probe = matroska_probe,
2528 .read_header = matroska_read_header,
2529 .read_packet = matroska_read_packet,
2530 .read_close = matroska_read_close,
2531 .read_seek = matroska_read_seek,