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matroskadec.c
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1 /*
2  * Matroska file demuxer
3  * Copyright (c) 2003-2008 The FFmpeg Project
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
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/
29  */
30 
31 #include "config.h"
32 
33 #include <inttypes.h>
34 #include <stdio.h>
35 
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
42 #include "libavutil/mathematics.h"
43 #include "libavutil/opt.h"
45 
46 #include "libavcodec/bytestream.h"
47 #include "libavcodec/flac.h"
48 #include "libavcodec/mpeg4audio.h"
49 
50 #include "avformat.h"
51 #include "avio_internal.h"
52 #include "internal.h"
53 #include "isom.h"
54 #include "matroska.h"
55 #include "oggdec.h"
56 /* For ff_codec_get_id(). */
57 #include "riff.h"
58 #include "rmsipr.h"
59 
60 #if CONFIG_BZLIB
61 #include <bzlib.h>
62 #endif
63 #if CONFIG_ZLIB
64 #include <zlib.h>
65 #endif
66 
67 typedef enum {
80 } EbmlType;
81 
82 typedef const struct EbmlSyntax {
83  uint32_t id;
87  union {
88  int64_t i;
89  uint64_t u;
90  double f;
91  const char *s;
92  const struct EbmlSyntax *n;
93  } def;
94 } EbmlSyntax;
95 
96 typedef struct EbmlList {
97  int nb_elem;
98  void *elem;
99 } EbmlList;
100 
101 typedef struct EbmlBin {
102  int size;
104  int64_t pos;
105 } EbmlBin;
106 
107 typedef struct Ebml {
108  uint64_t version;
109  uint64_t max_size;
110  uint64_t id_length;
111  char *doctype;
112  uint64_t doctype_version;
113 } Ebml;
114 
115 typedef struct MatroskaTrackCompression {
116  uint64_t algo;
119 
120 typedef struct MatroskaTrackEncryption {
121  uint64_t algo;
124 
125 typedef struct MatroskaTrackEncoding {
126  uint64_t scope;
127  uint64_t type;
131 
132 typedef struct MatroskaTrackVideo {
133  double frame_rate;
134  uint64_t display_width;
135  uint64_t display_height;
136  uint64_t pixel_width;
137  uint64_t pixel_height;
139  uint64_t stereo_mode;
140  uint64_t alpha_mode;
142 
143 typedef struct MatroskaTrackAudio {
144  double samplerate;
146  uint64_t bitdepth;
147  uint64_t channels;
148 
149  /* real audio header (extracted from extradata) */
155  int pkt_cnt;
156  uint64_t buf_timecode;
159 
160 typedef struct MatroskaTrackPlane {
161  uint64_t uid;
162  uint64_t type;
164 
165 typedef struct MatroskaTrackOperation {
168 
169 typedef struct MatroskaTrack {
170  uint64_t num;
171  uint64_t uid;
172  uint64_t type;
173  char *name;
174  char *codec_id;
176  char *language;
177  double time_scale;
179  uint64_t flag_default;
180  uint64_t flag_forced;
181  uint64_t seek_preroll;
186  uint64_t codec_delay;
187 
189  int64_t end_timecode;
192 } MatroskaTrack;
193 
194 typedef struct MatroskaAttachment {
195  uint64_t uid;
196  char *filename;
197  char *mime;
199 
202 
203 typedef struct MatroskaChapter {
204  uint64_t start;
205  uint64_t end;
206  uint64_t uid;
207  char *title;
208 
211 
212 typedef struct MatroskaIndexPos {
213  uint64_t track;
214  uint64_t pos;
216 
217 typedef struct MatroskaIndex {
218  uint64_t time;
220 } MatroskaIndex;
221 
222 typedef struct MatroskaTag {
223  char *name;
224  char *string;
225  char *lang;
226  uint64_t def;
228 } MatroskaTag;
229 
230 typedef struct MatroskaTagTarget {
231  char *type;
232  uint64_t typevalue;
233  uint64_t trackuid;
234  uint64_t chapteruid;
235  uint64_t attachuid;
237 
238 typedef struct MatroskaTags {
241 } MatroskaTags;
242 
243 typedef struct MatroskaSeekhead {
244  uint64_t id;
245  uint64_t pos;
247 
248 typedef struct MatroskaLevel {
249  uint64_t start;
250  uint64_t length;
251 } MatroskaLevel;
252 
253 typedef struct MatroskaCluster {
254  uint64_t timecode;
257 
258 typedef struct MatroskaLevel1Element {
259  uint64_t id;
260  uint64_t pos;
261  int parsed;
263 
264 typedef struct MatroskaDemuxContext {
265  const AVClass *class;
267 
268  /* EBML stuff */
271  int level_up;
272  uint32_t current_id;
273 
274  uint64_t time_scale;
275  double duration;
276  char *title;
277  char *muxingapp;
285 
286  /* byte position of the segment inside the stream */
287  int64_t segment_start;
288 
289  /* the packet queue */
293 
294  int done;
295 
296  /* What to skip before effectively reading a packet. */
299 
300  /* File has a CUES element, but we defer parsing until it is needed. */
302 
303  /* Level1 elements and whether they were read yet */
306 
310 
311  /* File has SSA subtitles which prevent incremental cluster parsing. */
313 
314  /* WebM DASH Manifest live flag/ */
315  int is_live;
317 
318 typedef struct MatroskaBlock {
319  uint64_t duration;
320  int64_t reference;
321  uint64_t non_simple;
323  uint64_t additional_id;
326 } MatroskaBlock;
327 
328 static const EbmlSyntax ebml_header[] = {
329  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
330  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
331  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
332  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
333  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
336  { 0 }
337 };
338 
339 static const EbmlSyntax ebml_syntax[] = {
340  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
341  { 0 }
342 };
343 
344 static const EbmlSyntax matroska_info[] = {
345  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
347  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
349  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
350  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
352  { 0 }
353 };
354 
356  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
357  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
358  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
359  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
360  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
361  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
362  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
371  { 0 }
372 };
373 
375  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
376  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
378  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
379  { 0 }
380 };
381 
385  { 0 }
386 };
387 
396  { 0 }
397 };
399  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
400  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
401  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
402  { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
404  { 0 }
405 };
406 
408  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
409  { 0 }
410 };
411 
415  { 0 }
416 };
417 
419  { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
420  { 0 }
421 };
422 
424  { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
425  { 0 }
426 };
427 
428 static const EbmlSyntax matroska_track[] = {
429  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
431  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
434  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
435  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
436  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
437  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
438  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
439  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
440  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
441  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
442  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
443  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
444  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
445  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
446  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
455  { 0 }
456 };
457 
458 static const EbmlSyntax matroska_tracks[] = {
459  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
460  { 0 }
461 };
462 
463 static const EbmlSyntax matroska_attachment[] = {
465  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
466  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
467  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
469  { 0 }
470 };
471 
473  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
474  { 0 }
475 };
476 
478  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
480  { 0 }
481 };
482 
487  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
492  { 0 }
493 };
494 
495 static const EbmlSyntax matroska_chapter[] = {
496  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
501  { 0 }
502 };
503 
504 static const EbmlSyntax matroska_chapters[] = {
505  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
506  { 0 }
507 };
508 
509 static const EbmlSyntax matroska_index_pos[] = {
510  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
515  { 0 }
516 };
517 
519  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
520  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
521  { 0 }
522 };
523 
524 static const EbmlSyntax matroska_index[] = {
525  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
526  { 0 }
527 };
528 
529 static const EbmlSyntax matroska_simpletag[] = {
530  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
531  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
532  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
533  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
534  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
535  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
536  { 0 }
537 };
538 
539 static const EbmlSyntax matroska_tagtargets[] = {
541  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
542  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
543  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
544  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
545  { 0 }
546 };
547 
548 static const EbmlSyntax matroska_tag[] = {
549  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
550  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
551  { 0 }
552 };
553 
554 static const EbmlSyntax matroska_tags[] = {
555  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
556  { 0 }
557 };
558 
560  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
561  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
562  { 0 }
563 };
564 
565 static const EbmlSyntax matroska_seekhead[] = {
566  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
567  { 0 }
568 };
569 
570 static const EbmlSyntax matroska_segment[] = {
571  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
572  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
573  { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
574  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
575  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
576  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
577  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
579  { 0 }
580 };
581 
582 static const EbmlSyntax matroska_segments[] = {
583  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
584  { 0 }
585 };
586 
587 static const EbmlSyntax matroska_blockmore[] = {
588  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id), { .u = 1 } },
589  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
590  { 0 }
591 };
592 
594  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
595  { 0 }
596 };
597 
598 static const EbmlSyntax matroska_blockgroup[] = {
599  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
600  { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
601  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
603  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
604  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
606  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
607  { 0 }
608 };
609 
610 static const EbmlSyntax matroska_cluster[] = {
611  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
612  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
613  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
616  { 0 }
617 };
618 
619 static const EbmlSyntax matroska_clusters[] = {
620  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
625  { 0 }
626 };
627 
629  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
630  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
631  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
639  { 0 }
640 };
641 
643  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
648  { 0 }
649 };
650 
652  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
657  { 0 }
658 };
659 
660 static const char *const matroska_doctypes[] = { "matroska", "webm" };
661 
662 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
663 {
664  AVIOContext *pb = matroska->ctx->pb;
665  uint32_t id;
666  matroska->current_id = 0;
667  matroska->num_levels = 0;
668 
669  /* seek to next position to resync from */
670  if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
671  goto eof;
672 
673  id = avio_rb32(pb);
674 
675  // try to find a toplevel element
676  while (!avio_feof(pb)) {
677  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
678  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
680  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
681  matroska->current_id = id;
682  return 0;
683  }
684  id = (id << 8) | avio_r8(pb);
685  }
686 
687 eof:
688  matroska->done = 1;
689  return AVERROR_EOF;
690 }
691 
692 /*
693  * Return: Whether we reached the end of a level in the hierarchy or not.
694  */
696 {
697  AVIOContext *pb = matroska->ctx->pb;
698  int64_t pos = avio_tell(pb);
699 
700  if (matroska->num_levels > 0) {
701  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
702  if (pos - level->start >= level->length || matroska->current_id) {
703  matroska->num_levels--;
704  return 1;
705  }
706  }
707  return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
708 }
709 
710 /*
711  * Read: an "EBML number", which is defined as a variable-length
712  * array of bytes. The first byte indicates the length by giving a
713  * number of 0-bits followed by a one. The position of the first
714  * "one" bit inside the first byte indicates the length of this
715  * number.
716  * Returns: number of bytes read, < 0 on error
717  */
719  int max_size, uint64_t *number)
720 {
721  int read = 1, n = 1;
722  uint64_t total = 0;
723 
724  /* The first byte tells us the length in bytes - avio_r8() can normally
725  * return 0, but since that's not a valid first ebmlID byte, we can
726  * use it safely here to catch EOS. */
727  if (!(total = avio_r8(pb))) {
728  /* we might encounter EOS here */
729  if (!avio_feof(pb)) {
730  int64_t pos = avio_tell(pb);
731  av_log(matroska->ctx, AV_LOG_ERROR,
732  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
733  pos, pos);
734  return pb->error ? pb->error : AVERROR(EIO);
735  }
736  return AVERROR_EOF;
737  }
738 
739  /* get the length of the EBML number */
740  read = 8 - ff_log2_tab[total];
741  if (read > max_size) {
742  int64_t pos = avio_tell(pb) - 1;
743  av_log(matroska->ctx, AV_LOG_ERROR,
744  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
745  (uint8_t) total, pos, pos);
746  return AVERROR_INVALIDDATA;
747  }
748 
749  /* read out length */
750  total ^= 1 << ff_log2_tab[total];
751  while (n++ < read)
752  total = (total << 8) | avio_r8(pb);
753 
754  *number = total;
755 
756  return read;
757 }
758 
759 /**
760  * Read a EBML length value.
761  * This needs special handling for the "unknown length" case which has multiple
762  * encodings.
763  */
765  uint64_t *number)
766 {
767  int res = ebml_read_num(matroska, pb, 8, number);
768  if (res > 0 && *number + 1 == 1ULL << (7 * res))
769  *number = 0xffffffffffffffULL;
770  return res;
771 }
772 
773 /*
774  * Read the next element as an unsigned int.
775  * 0 is success, < 0 is failure.
776  */
777 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
778 {
779  int n = 0;
780 
781  if (size > 8)
782  return AVERROR_INVALIDDATA;
783 
784  /* big-endian ordering; build up number */
785  *num = 0;
786  while (n++ < size)
787  *num = (*num << 8) | avio_r8(pb);
788 
789  return 0;
790 }
791 
792 /*
793  * Read the next element as a signed int.
794  * 0 is success, < 0 is failure.
795  */
796 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
797 {
798  int n = 1;
799 
800  if (size > 8)
801  return AVERROR_INVALIDDATA;
802 
803  if (size == 0) {
804  *num = 0;
805  } else {
806  *num = sign_extend(avio_r8(pb), 8);
807 
808  /* big-endian ordering; build up number */
809  while (n++ < size)
810  *num = ((uint64_t)*num << 8) | avio_r8(pb);
811  }
812 
813  return 0;
814 }
815 
816 /*
817  * Read the next element as a float.
818  * 0 is success, < 0 is failure.
819  */
820 static int ebml_read_float(AVIOContext *pb, int size, double *num)
821 {
822  if (size == 0)
823  *num = 0;
824  else if (size == 4)
825  *num = av_int2float(avio_rb32(pb));
826  else if (size == 8)
827  *num = av_int2double(avio_rb64(pb));
828  else
829  return AVERROR_INVALIDDATA;
830 
831  return 0;
832 }
833 
834 /*
835  * Read the next element as an ASCII string.
836  * 0 is success, < 0 is failure.
837  */
838 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
839 {
840  char *res;
841 
842  /* EBML strings are usually not 0-terminated, so we allocate one
843  * byte more, read the string and NULL-terminate it ourselves. */
844  if (!(res = av_malloc(size + 1)))
845  return AVERROR(ENOMEM);
846  if (avio_read(pb, (uint8_t *) res, size) != size) {
847  av_free(res);
848  return AVERROR(EIO);
849  }
850  (res)[size] = '\0';
851  av_free(*str);
852  *str = res;
853 
854  return 0;
855 }
856 
857 /*
858  * Read the next element as binary data.
859  * 0 is success, < 0 is failure.
860  */
861 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
862 {
863  av_fast_padded_malloc(&bin->data, &bin->size, length);
864  if (!bin->data)
865  return AVERROR(ENOMEM);
866 
867  bin->size = length;
868  bin->pos = avio_tell(pb);
869  if (avio_read(pb, bin->data, length) != length) {
870  av_freep(&bin->data);
871  bin->size = 0;
872  return AVERROR(EIO);
873  }
874 
875  return 0;
876 }
877 
878 /*
879  * Read the next element, but only the header. The contents
880  * are supposed to be sub-elements which can be read separately.
881  * 0 is success, < 0 is failure.
882  */
883 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
884 {
885  AVIOContext *pb = matroska->ctx->pb;
887 
888  if (matroska->num_levels >= EBML_MAX_DEPTH) {
889  av_log(matroska->ctx, AV_LOG_ERROR,
890  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
891  return AVERROR(ENOSYS);
892  }
893 
894  level = &matroska->levels[matroska->num_levels++];
895  level->start = avio_tell(pb);
896  level->length = length;
897 
898  return 0;
899 }
900 
901 /*
902  * Read signed/unsigned "EBML" numbers.
903  * Return: number of bytes processed, < 0 on error
904  */
906  uint8_t *data, uint32_t size, uint64_t *num)
907 {
908  AVIOContext pb;
909  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
910  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
911 }
912 
913 /*
914  * Same as above, but signed.
915  */
917  uint8_t *data, uint32_t size, int64_t *num)
918 {
919  uint64_t unum;
920  int res;
921 
922  /* read as unsigned number first */
923  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
924  return res;
925 
926  /* make signed (weird way) */
927  *num = unum - ((1LL << (7 * res - 1)) - 1);
928 
929  return res;
930 }
931 
932 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
933  EbmlSyntax *syntax, void *data);
934 
935 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
936  uint32_t id, void *data)
937 {
938  int i;
939  for (i = 0; syntax[i].id; i++)
940  if (id == syntax[i].id)
941  break;
942  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
943  matroska->num_levels > 0 &&
944  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
945  return 0; // we reached the end of an unknown size cluster
946  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
947  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
948  }
949  return ebml_parse_elem(matroska, &syntax[i], data);
950 }
951 
952 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
953  void *data)
954 {
955  if (!matroska->current_id) {
956  uint64_t id;
957  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
958  if (res < 0) {
959  // in live mode, finish parsing if EOF is reached.
960  return (matroska->is_live && matroska->ctx->pb->eof_reached &&
961  res == AVERROR_EOF) ? 1 : res;
962  }
963  matroska->current_id = id | 1 << 7 * res;
964  }
965  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
966 }
967 
968 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
969  void *data)
970 {
971  int i, res = 0;
972 
973  for (i = 0; syntax[i].id; i++)
974  switch (syntax[i].type) {
975  case EBML_SINT:
976  *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
977  break;
978  case EBML_UINT:
979  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
980  break;
981  case EBML_FLOAT:
982  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
983  break;
984  case EBML_STR:
985  case EBML_UTF8:
986  // the default may be NULL
987  if (syntax[i].def.s) {
988  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
989  *dst = av_strdup(syntax[i].def.s);
990  if (!*dst)
991  return AVERROR(ENOMEM);
992  }
993  break;
994  }
995 
996  while (!res && !ebml_level_end(matroska))
997  res = ebml_parse(matroska, syntax, data);
998 
999  return res;
1000 }
1001 
1002 static int is_ebml_id_valid(uint32_t id)
1003 {
1004  // Due to endian nonsense in Matroska, the highest byte with any bits set
1005  // will contain the leading length bit. This bit in turn identifies the
1006  // total byte length of the element by its position within the byte.
1007  unsigned int bits = av_log2(id);
1008  return id && (bits + 7) / 8 == (8 - bits % 8);
1009 }
1010 
1011 /*
1012  * Allocate and return the entry for the level1 element with the given ID. If
1013  * an entry already exists, return the existing entry.
1014  */
1016  uint32_t id)
1017 {
1018  int i;
1019  MatroskaLevel1Element *elem;
1020 
1021  if (!is_ebml_id_valid(id))
1022  return NULL;
1023 
1024  // Some files link to all clusters; useless.
1025  if (id == MATROSKA_ID_CLUSTER)
1026  return NULL;
1027 
1028  // There can be multiple seekheads.
1029  if (id != MATROSKA_ID_SEEKHEAD) {
1030  for (i = 0; i < matroska->num_level1_elems; i++) {
1031  if (matroska->level1_elems[i].id == id)
1032  return &matroska->level1_elems[i];
1033  }
1034  }
1035 
1036  // Only a completely broken file would have more elements.
1037  // It also provides a low-effort way to escape from circular seekheads
1038  // (every iteration will add a level1 entry).
1039  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1040  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1041  return NULL;
1042  }
1043 
1044  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1045  *elem = (MatroskaLevel1Element){.id = id};
1046 
1047  return elem;
1048 }
1049 
1051  EbmlSyntax *syntax, void *data)
1052 {
1053  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1054  [EBML_UINT] = 8,
1055  [EBML_FLOAT] = 8,
1056  // max. 16 MB for strings
1057  [EBML_STR] = 0x1000000,
1058  [EBML_UTF8] = 0x1000000,
1059  // max. 256 MB for binary data
1060  [EBML_BIN] = 0x10000000,
1061  // no limits for anything else
1062  };
1063  AVIOContext *pb = matroska->ctx->pb;
1064  uint32_t id = syntax->id;
1065  uint64_t length;
1066  int res;
1067  void *newelem;
1068  MatroskaLevel1Element *level1_elem;
1069 
1070  data = (char *) data + syntax->data_offset;
1071  if (syntax->list_elem_size) {
1072  EbmlList *list = data;
1073  newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1074  if (!newelem)
1075  return AVERROR(ENOMEM);
1076  list->elem = newelem;
1077  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1078  memset(data, 0, syntax->list_elem_size);
1079  list->nb_elem++;
1080  }
1081 
1082  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1083  matroska->current_id = 0;
1084  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1085  return res;
1086  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1087  av_log(matroska->ctx, AV_LOG_ERROR,
1088  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1089  length, max_lengths[syntax->type], syntax->type);
1090  return AVERROR_INVALIDDATA;
1091  }
1092  }
1093 
1094  switch (syntax->type) {
1095  case EBML_UINT:
1096  res = ebml_read_uint(pb, length, data);
1097  break;
1098  case EBML_SINT:
1099  res = ebml_read_sint(pb, length, data);
1100  break;
1101  case EBML_FLOAT:
1102  res = ebml_read_float(pb, length, data);
1103  break;
1104  case EBML_STR:
1105  case EBML_UTF8:
1106  res = ebml_read_ascii(pb, length, data);
1107  break;
1108  case EBML_BIN:
1109  res = ebml_read_binary(pb, length, data);
1110  break;
1111  case EBML_LEVEL1:
1112  case EBML_NEST:
1113  if ((res = ebml_read_master(matroska, length)) < 0)
1114  return res;
1115  if (id == MATROSKA_ID_SEGMENT)
1116  matroska->segment_start = avio_tell(matroska->ctx->pb);
1117  if (id == MATROSKA_ID_CUES)
1118  matroska->cues_parsing_deferred = 0;
1119  if (syntax->type == EBML_LEVEL1 &&
1120  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1121  if (level1_elem->parsed)
1122  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1123  level1_elem->parsed = 1;
1124  }
1125  return ebml_parse_nest(matroska, syntax->def.n, data);
1126  case EBML_PASS:
1127  return ebml_parse_id(matroska, syntax->def.n, id, data);
1128  case EBML_STOP:
1129  return 1;
1130  default:
1131  if (ffio_limit(pb, length) != length)
1132  return AVERROR(EIO);
1133  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1134  }
1135  if (res == AVERROR_INVALIDDATA)
1136  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1137  else if (res == AVERROR(EIO))
1138  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1139  return res;
1140 }
1141 
1142 static void ebml_free(EbmlSyntax *syntax, void *data)
1143 {
1144  int i, j;
1145  for (i = 0; syntax[i].id; i++) {
1146  void *data_off = (char *) data + syntax[i].data_offset;
1147  switch (syntax[i].type) {
1148  case EBML_STR:
1149  case EBML_UTF8:
1150  av_freep(data_off);
1151  break;
1152  case EBML_BIN:
1153  av_freep(&((EbmlBin *) data_off)->data);
1154  break;
1155  case EBML_LEVEL1:
1156  case EBML_NEST:
1157  if (syntax[i].list_elem_size) {
1158  EbmlList *list = data_off;
1159  char *ptr = list->elem;
1160  for (j = 0; j < list->nb_elem;
1161  j++, ptr += syntax[i].list_elem_size)
1162  ebml_free(syntax[i].def.n, ptr);
1163  av_freep(&list->elem);
1164  } else
1165  ebml_free(syntax[i].def.n, data_off);
1166  default:
1167  break;
1168  }
1169  }
1170 }
1171 
1172 /*
1173  * Autodetecting...
1174  */
1176 {
1177  uint64_t total = 0;
1178  int len_mask = 0x80, size = 1, n = 1, i;
1179 
1180  /* EBML header? */
1181  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1182  return 0;
1183 
1184  /* length of header */
1185  total = p->buf[4];
1186  while (size <= 8 && !(total & len_mask)) {
1187  size++;
1188  len_mask >>= 1;
1189  }
1190  if (size > 8)
1191  return 0;
1192  total &= (len_mask - 1);
1193  while (n < size)
1194  total = (total << 8) | p->buf[4 + n++];
1195 
1196  /* Does the probe data contain the whole header? */
1197  if (p->buf_size < 4 + size + total)
1198  return 0;
1199 
1200  /* The header should contain a known document type. For now,
1201  * we don't parse the whole header but simply check for the
1202  * availability of that array of characters inside the header.
1203  * Not fully fool-proof, but good enough. */
1204  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1205  size_t probelen = strlen(matroska_doctypes[i]);
1206  if (total < probelen)
1207  continue;
1208  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1209  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1210  return AVPROBE_SCORE_MAX;
1211  }
1212 
1213  // probably valid EBML header but no recognized doctype
1214  return AVPROBE_SCORE_EXTENSION;
1215 }
1216 
1218  int num)
1219 {
1220  MatroskaTrack *tracks = matroska->tracks.elem;
1221  int i;
1222 
1223  for (i = 0; i < matroska->tracks.nb_elem; i++)
1224  if (tracks[i].num == num)
1225  return &tracks[i];
1226 
1227  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1228  return NULL;
1229 }
1230 
1231 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1232  MatroskaTrack *track)
1233 {
1234  MatroskaTrackEncoding *encodings = track->encodings.elem;
1235  uint8_t *data = *buf;
1236  int isize = *buf_size;
1237  uint8_t *pkt_data = NULL;
1238  uint8_t av_unused *newpktdata;
1239  int pkt_size = isize;
1240  int result = 0;
1241  int olen;
1242 
1243  if (pkt_size >= 10000000U)
1244  return AVERROR_INVALIDDATA;
1245 
1246  switch (encodings[0].compression.algo) {
1248  {
1249  int header_size = encodings[0].compression.settings.size;
1250  uint8_t *header = encodings[0].compression.settings.data;
1251 
1252  if (header_size && !header) {
1253  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1254  return -1;
1255  }
1256 
1257  if (!header_size)
1258  return 0;
1259 
1260  pkt_size = isize + header_size;
1261  pkt_data = av_malloc(pkt_size);
1262  if (!pkt_data)
1263  return AVERROR(ENOMEM);
1264 
1265  memcpy(pkt_data, header, header_size);
1266  memcpy(pkt_data + header_size, data, isize);
1267  break;
1268  }
1269 #if CONFIG_LZO
1271  do {
1272  olen = pkt_size *= 3;
1273  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1274  if (!newpktdata) {
1275  result = AVERROR(ENOMEM);
1276  goto failed;
1277  }
1278  pkt_data = newpktdata;
1279  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1280  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1281  if (result) {
1282  result = AVERROR_INVALIDDATA;
1283  goto failed;
1284  }
1285  pkt_size -= olen;
1286  break;
1287 #endif
1288 #if CONFIG_ZLIB
1290  {
1291  z_stream zstream = { 0 };
1292  if (inflateInit(&zstream) != Z_OK)
1293  return -1;
1294  zstream.next_in = data;
1295  zstream.avail_in = isize;
1296  do {
1297  pkt_size *= 3;
1298  newpktdata = av_realloc(pkt_data, pkt_size);
1299  if (!newpktdata) {
1300  inflateEnd(&zstream);
1301  result = AVERROR(ENOMEM);
1302  goto failed;
1303  }
1304  pkt_data = newpktdata;
1305  zstream.avail_out = pkt_size - zstream.total_out;
1306  zstream.next_out = pkt_data + zstream.total_out;
1307  result = inflate(&zstream, Z_NO_FLUSH);
1308  } while (result == Z_OK && pkt_size < 10000000);
1309  pkt_size = zstream.total_out;
1310  inflateEnd(&zstream);
1311  if (result != Z_STREAM_END) {
1312  if (result == Z_MEM_ERROR)
1313  result = AVERROR(ENOMEM);
1314  else
1315  result = AVERROR_INVALIDDATA;
1316  goto failed;
1317  }
1318  break;
1319  }
1320 #endif
1321 #if CONFIG_BZLIB
1323  {
1324  bz_stream bzstream = { 0 };
1325  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1326  return -1;
1327  bzstream.next_in = data;
1328  bzstream.avail_in = isize;
1329  do {
1330  pkt_size *= 3;
1331  newpktdata = av_realloc(pkt_data, pkt_size);
1332  if (!newpktdata) {
1333  BZ2_bzDecompressEnd(&bzstream);
1334  result = AVERROR(ENOMEM);
1335  goto failed;
1336  }
1337  pkt_data = newpktdata;
1338  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1339  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1340  result = BZ2_bzDecompress(&bzstream);
1341  } while (result == BZ_OK && pkt_size < 10000000);
1342  pkt_size = bzstream.total_out_lo32;
1343  BZ2_bzDecompressEnd(&bzstream);
1344  if (result != BZ_STREAM_END) {
1345  if (result == BZ_MEM_ERROR)
1346  result = AVERROR(ENOMEM);
1347  else
1348  result = AVERROR_INVALIDDATA;
1349  goto failed;
1350  }
1351  break;
1352  }
1353 #endif
1354  default:
1355  return AVERROR_INVALIDDATA;
1356  }
1357 
1358  *buf = pkt_data;
1359  *buf_size = pkt_size;
1360  return 0;
1361 
1362 failed:
1363  av_free(pkt_data);
1364  return result;
1365 }
1366 
1368  AVDictionary **metadata, char *prefix)
1369 {
1370  MatroskaTag *tags = list->elem;
1371  char key[1024];
1372  int i;
1373 
1374  for (i = 0; i < list->nb_elem; i++) {
1375  const char *lang = tags[i].lang &&
1376  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1377 
1378  if (!tags[i].name) {
1379  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1380  continue;
1381  }
1382  if (prefix)
1383  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1384  else
1385  av_strlcpy(key, tags[i].name, sizeof(key));
1386  if (tags[i].def || !lang) {
1387  av_dict_set(metadata, key, tags[i].string, 0);
1388  if (tags[i].sub.nb_elem)
1389  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1390  }
1391  if (lang) {
1392  av_strlcat(key, "-", sizeof(key));
1393  av_strlcat(key, lang, sizeof(key));
1394  av_dict_set(metadata, key, tags[i].string, 0);
1395  if (tags[i].sub.nb_elem)
1396  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1397  }
1398  }
1400 }
1401 
1403 {
1404  MatroskaDemuxContext *matroska = s->priv_data;
1405  MatroskaTags *tags = matroska->tags.elem;
1406  int i, j;
1407 
1408  for (i = 0; i < matroska->tags.nb_elem; i++) {
1409  if (tags[i].target.attachuid) {
1410  MatroskaAttachment *attachment = matroska->attachments.elem;
1411  for (j = 0; j < matroska->attachments.nb_elem; j++)
1412  if (attachment[j].uid == tags[i].target.attachuid &&
1413  attachment[j].stream)
1414  matroska_convert_tag(s, &tags[i].tag,
1415  &attachment[j].stream->metadata, NULL);
1416  } else if (tags[i].target.chapteruid) {
1417  MatroskaChapter *chapter = matroska->chapters.elem;
1418  for (j = 0; j < matroska->chapters.nb_elem; j++)
1419  if (chapter[j].uid == tags[i].target.chapteruid &&
1420  chapter[j].chapter)
1421  matroska_convert_tag(s, &tags[i].tag,
1422  &chapter[j].chapter->metadata, NULL);
1423  } else if (tags[i].target.trackuid) {
1424  MatroskaTrack *track = matroska->tracks.elem;
1425  for (j = 0; j < matroska->tracks.nb_elem; j++)
1426  if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1427  matroska_convert_tag(s, &tags[i].tag,
1428  &track[j].stream->metadata, NULL);
1429  } else {
1430  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1431  tags[i].target.type);
1432  }
1433  }
1434 }
1435 
1437  uint64_t pos)
1438 {
1439  uint32_t level_up = matroska->level_up;
1440  uint32_t saved_id = matroska->current_id;
1441  int64_t before_pos = avio_tell(matroska->ctx->pb);
1443  int64_t offset;
1444  int ret = 0;
1445 
1446  /* seek */
1447  offset = pos + matroska->segment_start;
1448  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1449  /* We don't want to lose our seekhead level, so we add
1450  * a dummy. This is a crude hack. */
1451  if (matroska->num_levels == EBML_MAX_DEPTH) {
1452  av_log(matroska->ctx, AV_LOG_INFO,
1453  "Max EBML element depth (%d) reached, "
1454  "cannot parse further.\n", EBML_MAX_DEPTH);
1455  ret = AVERROR_INVALIDDATA;
1456  } else {
1457  level.start = 0;
1458  level.length = (uint64_t) -1;
1459  matroska->levels[matroska->num_levels] = level;
1460  matroska->num_levels++;
1461  matroska->current_id = 0;
1462 
1463  ret = ebml_parse(matroska, matroska_segment, matroska);
1464 
1465  /* remove dummy level */
1466  while (matroska->num_levels) {
1467  uint64_t length = matroska->levels[--matroska->num_levels].length;
1468  if (length == (uint64_t) -1)
1469  break;
1470  }
1471  }
1472  }
1473  /* seek back */
1474  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1475  matroska->level_up = level_up;
1476  matroska->current_id = saved_id;
1477 
1478  return ret;
1479 }
1480 
1482 {
1483  EbmlList *seekhead_list = &matroska->seekhead;
1484  int i;
1485 
1486  // we should not do any seeking in the streaming case
1487  if (!matroska->ctx->pb->seekable)
1488  return;
1489 
1490  for (i = 0; i < seekhead_list->nb_elem; i++) {
1491  MatroskaSeekhead *seekheads = seekhead_list->elem;
1492  uint32_t id = seekheads[i].id;
1493  uint64_t pos = seekheads[i].pos;
1494 
1495  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1496  if (!elem || elem->parsed)
1497  continue;
1498 
1499  elem->pos = pos;
1500 
1501  // defer cues parsing until we actually need cue data.
1502  if (id == MATROSKA_ID_CUES)
1503  continue;
1504 
1505  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1506  // mark index as broken
1507  matroska->cues_parsing_deferred = -1;
1508  break;
1509  }
1510 
1511  elem->parsed = 1;
1512  }
1513 }
1514 
1516 {
1517  EbmlList *index_list;
1519  uint64_t index_scale = 1;
1520  int i, j;
1521 
1522  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1523  return;
1524 
1525  index_list = &matroska->index;
1526  index = index_list->elem;
1527  if (index_list->nb_elem &&
1528  index[0].time > 1E14 / matroska->time_scale) {
1529  av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1530  index_scale = matroska->time_scale;
1531  }
1532  for (i = 0; i < index_list->nb_elem; i++) {
1533  EbmlList *pos_list = &index[i].pos;
1534  MatroskaIndexPos *pos = pos_list->elem;
1535  for (j = 0; j < pos_list->nb_elem; j++) {
1536  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1537  pos[j].track);
1538  if (track && track->stream)
1539  av_add_index_entry(track->stream,
1540  pos[j].pos + matroska->segment_start,
1541  index[i].time / index_scale, 0, 0,
1543  }
1544  }
1545 }
1546 
1548  int i;
1549 
1550  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1551  return;
1552 
1553  for (i = 0; i < matroska->num_level1_elems; i++) {
1554  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1555  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1556  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1557  matroska->cues_parsing_deferred = -1;
1558  elem->parsed = 1;
1559  break;
1560  }
1561  }
1562 
1563  matroska_add_index_entries(matroska);
1564 }
1565 
1567 {
1568  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1569  int profile;
1570 
1571  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1572  if (strstr(codec_id, aac_profiles[profile]))
1573  break;
1574  return profile + 1;
1575 }
1576 
1577 static int matroska_aac_sri(int samplerate)
1578 {
1579  int sri;
1580 
1581  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1582  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1583  break;
1584  return sri;
1585 }
1586 
1587 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1588 {
1589  char buffer[32];
1590  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1591  time_t creation_time = date_utc / 1000000000 + 978307200;
1592  struct tm tmpbuf, *ptm = gmtime_r(&creation_time, &tmpbuf);
1593  if (!ptm) return;
1594  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1595  av_dict_set(metadata, "creation_time", buffer, 0);
1596 }
1597 
1599  MatroskaTrack *track,
1600  int *offset)
1601 {
1602  AVStream *st = track->stream;
1603  uint8_t *p = track->codec_priv.data;
1604  int size = track->codec_priv.size;
1605 
1606  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1607  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1608  track->codec_priv.size = 0;
1609  return 0;
1610  }
1611  *offset = 8;
1612  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1613 
1614  p += track->codec_priv.size;
1615  size -= track->codec_priv.size;
1616 
1617  /* parse the remaining metadata blocks if present */
1618  while (size >= 4) {
1619  int block_last, block_type, block_size;
1620 
1621  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1622 
1623  p += 4;
1624  size -= 4;
1625  if (block_size > size)
1626  return 0;
1627 
1628  /* check for the channel mask */
1629  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1630  AVDictionary *dict = NULL;
1631  AVDictionaryEntry *chmask;
1632 
1633  ff_vorbis_comment(s, &dict, p, block_size, 0);
1634  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1635  if (chmask) {
1636  uint64_t mask = strtol(chmask->value, NULL, 0);
1637  if (!mask || mask & ~0x3ffffULL) {
1639  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1640  } else
1641  st->codec->channel_layout = mask;
1642  }
1643  av_dict_free(&dict);
1644  }
1645 
1646  p += block_size;
1647  size -= block_size;
1648  }
1649 
1650  return 0;
1651 }
1652 
1654 {
1655  MatroskaDemuxContext *matroska = s->priv_data;
1656  MatroskaTrack *tracks = matroska->tracks.elem;
1657  AVStream *st;
1658  int i, j, ret;
1659  int k;
1660 
1661  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1662  MatroskaTrack *track = &tracks[i];
1664  EbmlList *encodings_list = &track->encodings;
1665  MatroskaTrackEncoding *encodings = encodings_list->elem;
1666  uint8_t *extradata = NULL;
1667  int extradata_size = 0;
1668  int extradata_offset = 0;
1669  uint32_t fourcc = 0;
1670  AVIOContext b;
1671  char* key_id_base64 = NULL;
1672  int bit_depth = -1;
1673 
1674  /* Apply some sanity checks. */
1675  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1676  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1677  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1678  track->type != MATROSKA_TRACK_TYPE_METADATA) {
1679  av_log(matroska->ctx, AV_LOG_INFO,
1680  "Unknown or unsupported track type %"PRIu64"\n",
1681  track->type);
1682  continue;
1683  }
1684  if (!track->codec_id)
1685  continue;
1686 
1687  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
1688  isnan(track->audio.samplerate)) {
1689  av_log(matroska->ctx, AV_LOG_WARNING,
1690  "Invalid sample rate %f, defaulting to 8000 instead.\n",
1691  track->audio.samplerate);
1692  track->audio.samplerate = 8000;
1693  }
1694 
1695  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1696  if (!track->default_duration && track->video.frame_rate > 0) {
1697  double default_duration = 1000000000 / track->video.frame_rate;
1698  if (default_duration > UINT64_MAX || default_duration < 0) {
1699  av_log(matroska->ctx, AV_LOG_WARNING,
1700  "Invalid frame rate %e. Cannot calculate default duration.\n",
1701  track->video.frame_rate);
1702  } else {
1703  track->default_duration = default_duration;
1704  }
1705  }
1706  if (track->video.display_width == -1)
1707  track->video.display_width = track->video.pixel_width;
1708  if (track->video.display_height == -1)
1709  track->video.display_height = track->video.pixel_height;
1710  if (track->video.color_space.size == 4)
1711  fourcc = AV_RL32(track->video.color_space.data);
1712  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1713  if (!track->audio.out_samplerate)
1714  track->audio.out_samplerate = track->audio.samplerate;
1715  }
1716  if (encodings_list->nb_elem > 1) {
1717  av_log(matroska->ctx, AV_LOG_ERROR,
1718  "Multiple combined encodings not supported");
1719  } else if (encodings_list->nb_elem == 1) {
1720  if (encodings[0].type) {
1721  if (encodings[0].encryption.key_id.size > 0) {
1722  /* Save the encryption key id to be stored later as a
1723  metadata tag. */
1724  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1725  key_id_base64 = av_malloc(b64_size);
1726  if (key_id_base64 == NULL)
1727  return AVERROR(ENOMEM);
1728 
1729  av_base64_encode(key_id_base64, b64_size,
1730  encodings[0].encryption.key_id.data,
1731  encodings[0].encryption.key_id.size);
1732  } else {
1733  encodings[0].scope = 0;
1734  av_log(matroska->ctx, AV_LOG_ERROR,
1735  "Unsupported encoding type");
1736  }
1737  } else if (
1738 #if CONFIG_ZLIB
1739  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1740 #endif
1741 #if CONFIG_BZLIB
1743 #endif
1744 #if CONFIG_LZO
1746 #endif
1748  encodings[0].scope = 0;
1749  av_log(matroska->ctx, AV_LOG_ERROR,
1750  "Unsupported encoding type");
1751  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1752  uint8_t *codec_priv = track->codec_priv.data;
1753  int ret = matroska_decode_buffer(&track->codec_priv.data,
1754  &track->codec_priv.size,
1755  track);
1756  if (ret < 0) {
1757  track->codec_priv.data = NULL;
1758  track->codec_priv.size = 0;
1759  av_log(matroska->ctx, AV_LOG_ERROR,
1760  "Failed to decode codec private data\n");
1761  }
1762 
1763  if (codec_priv != track->codec_priv.data)
1764  av_free(codec_priv);
1765  }
1766  }
1767 
1768  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1769  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1770  strlen(ff_mkv_codec_tags[j].str))) {
1771  codec_id = ff_mkv_codec_tags[j].id;
1772  break;
1773  }
1774  }
1775 
1776  st = track->stream = avformat_new_stream(s, NULL);
1777  if (!st) {
1778  av_free(key_id_base64);
1779  return AVERROR(ENOMEM);
1780  }
1781 
1782  if (key_id_base64) {
1783  /* export encryption key id as base64 metadata tag */
1784  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
1785  av_freep(&key_id_base64);
1786  }
1787 
1788  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1789  track->codec_priv.size >= 40 &&
1790  track->codec_priv.data) {
1791  track->ms_compat = 1;
1792  bit_depth = AV_RL16(track->codec_priv.data + 14);
1793  fourcc = AV_RL32(track->codec_priv.data + 16);
1795  fourcc);
1796  if (!codec_id)
1798  fourcc);
1799  extradata_offset = 40;
1800  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1801  track->codec_priv.size >= 14 &&
1802  track->codec_priv.data) {
1803  int ret;
1804  ffio_init_context(&b, track->codec_priv.data,
1805  track->codec_priv.size,
1806  0, NULL, NULL, NULL, NULL);
1807  ret = ff_get_wav_header(s, &b, st->codec, track->codec_priv.size, 0);
1808  if (ret < 0)
1809  return ret;
1810  codec_id = st->codec->codec_id;
1811  extradata_offset = FFMIN(track->codec_priv.size, 18);
1812  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
1813  && (track->codec_priv.size >= 86)
1814  && (track->codec_priv.data)) {
1815  fourcc = AV_RL32(track->codec_priv.data + 4);
1816  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1818  fourcc = AV_RL32(track->codec_priv.data);
1819  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1820  }
1821  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1822  (track->codec_priv.size >= 21) &&
1823  (track->codec_priv.data)) {
1824  fourcc = AV_RL32(track->codec_priv.data + 4);
1825  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1827  fourcc = AV_RL32(track->codec_priv.data);
1828  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1829  }
1830  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI "))
1831  codec_id = AV_CODEC_ID_SVQ3;
1832  if (codec_id == AV_CODEC_ID_NONE) {
1833  char buf[32];
1834  av_get_codec_tag_string(buf, sizeof(buf), fourcc);
1835  av_log(matroska->ctx, AV_LOG_ERROR,
1836  "mov FourCC not found %s.\n", buf);
1837  }
1838  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1839  switch (track->audio.bitdepth) {
1840  case 8:
1841  codec_id = AV_CODEC_ID_PCM_U8;
1842  break;
1843  case 24:
1844  codec_id = AV_CODEC_ID_PCM_S24BE;
1845  break;
1846  case 32:
1847  codec_id = AV_CODEC_ID_PCM_S32BE;
1848  break;
1849  }
1850  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1851  switch (track->audio.bitdepth) {
1852  case 8:
1853  codec_id = AV_CODEC_ID_PCM_U8;
1854  break;
1855  case 24:
1856  codec_id = AV_CODEC_ID_PCM_S24LE;
1857  break;
1858  case 32:
1859  codec_id = AV_CODEC_ID_PCM_S32LE;
1860  break;
1861  }
1862  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1863  track->audio.bitdepth == 64) {
1864  codec_id = AV_CODEC_ID_PCM_F64LE;
1865  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1866  int profile = matroska_aac_profile(track->codec_id);
1867  int sri = matroska_aac_sri(track->audio.samplerate);
1868  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
1869  if (!extradata)
1870  return AVERROR(ENOMEM);
1871  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1872  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1873  if (strstr(track->codec_id, "SBR")) {
1874  sri = matroska_aac_sri(track->audio.out_samplerate);
1875  extradata[2] = 0x56;
1876  extradata[3] = 0xE5;
1877  extradata[4] = 0x80 | (sri << 3);
1878  extradata_size = 5;
1879  } else
1880  extradata_size = 2;
1881  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
1882  /* Only ALAC's magic cookie is stored in Matroska's track headers.
1883  * Create the "atom size", "tag", and "tag version" fields the
1884  * decoder expects manually. */
1885  extradata_size = 12 + track->codec_priv.size;
1886  extradata = av_mallocz(extradata_size +
1888  if (!extradata)
1889  return AVERROR(ENOMEM);
1890  AV_WB32(extradata, extradata_size);
1891  memcpy(&extradata[4], "alac", 4);
1892  AV_WB32(&extradata[8], 0);
1893  memcpy(&extradata[12], track->codec_priv.data,
1894  track->codec_priv.size);
1895  } else if (codec_id == AV_CODEC_ID_TTA) {
1896  extradata_size = 30;
1897  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
1898  if (!extradata)
1899  return AVERROR(ENOMEM);
1900  ffio_init_context(&b, extradata, extradata_size, 1,
1901  NULL, NULL, NULL, NULL);
1902  avio_write(&b, "TTA1", 4);
1903  avio_wl16(&b, 1);
1904  if (track->audio.channels > UINT16_MAX ||
1905  track->audio.bitdepth > UINT16_MAX) {
1906  av_log(matroska->ctx, AV_LOG_WARNING,
1907  "Too large audio channel number %"PRIu64
1908  " or bitdepth %"PRIu64". Skipping track.\n",
1909  track->audio.channels, track->audio.bitdepth);
1910  av_freep(&extradata);
1911  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
1912  return AVERROR_INVALIDDATA;
1913  else
1914  continue;
1915  }
1916  avio_wl16(&b, track->audio.channels);
1917  avio_wl16(&b, track->audio.bitdepth);
1918  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
1919  return AVERROR_INVALIDDATA;
1920  avio_wl32(&b, track->audio.out_samplerate);
1921  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
1922  track->audio.out_samplerate,
1923  AV_TIME_BASE * 1000));
1924  } else if (codec_id == AV_CODEC_ID_RV10 ||
1925  codec_id == AV_CODEC_ID_RV20 ||
1926  codec_id == AV_CODEC_ID_RV30 ||
1927  codec_id == AV_CODEC_ID_RV40) {
1928  extradata_offset = 26;
1929  } else if (codec_id == AV_CODEC_ID_RA_144) {
1930  track->audio.out_samplerate = 8000;
1931  track->audio.channels = 1;
1932  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
1933  codec_id == AV_CODEC_ID_COOK ||
1934  codec_id == AV_CODEC_ID_ATRAC3 ||
1935  codec_id == AV_CODEC_ID_SIPR)
1936  && track->codec_priv.data) {
1937  int flavor;
1938 
1939  ffio_init_context(&b, track->codec_priv.data,
1940  track->codec_priv.size,
1941  0, NULL, NULL, NULL, NULL);
1942  avio_skip(&b, 22);
1943  flavor = avio_rb16(&b);
1944  track->audio.coded_framesize = avio_rb32(&b);
1945  avio_skip(&b, 12);
1946  track->audio.sub_packet_h = avio_rb16(&b);
1947  track->audio.frame_size = avio_rb16(&b);
1948  track->audio.sub_packet_size = avio_rb16(&b);
1949  if (flavor < 0 ||
1950  track->audio.coded_framesize <= 0 ||
1951  track->audio.sub_packet_h <= 0 ||
1952  track->audio.frame_size <= 0 ||
1953  track->audio.sub_packet_size <= 0)
1954  return AVERROR_INVALIDDATA;
1955  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
1956  track->audio.frame_size);
1957  if (!track->audio.buf)
1958  return AVERROR(ENOMEM);
1959  if (codec_id == AV_CODEC_ID_RA_288) {
1960  st->codec->block_align = track->audio.coded_framesize;
1961  track->codec_priv.size = 0;
1962  } else {
1963  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1964  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1965  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1966  st->codec->bit_rate = sipr_bit_rate[flavor];
1967  }
1968  st->codec->block_align = track->audio.sub_packet_size;
1969  extradata_offset = 78;
1970  }
1971  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1972  ret = matroska_parse_flac(s, track, &extradata_offset);
1973  if (ret < 0)
1974  return ret;
1975  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
1976  fourcc = AV_RL32(track->codec_priv.data);
1977  }
1978  track->codec_priv.size -= extradata_offset;
1979 
1980  if (codec_id == AV_CODEC_ID_NONE)
1981  av_log(matroska->ctx, AV_LOG_INFO,
1982  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1983 
1984  if (track->time_scale < 0.01)
1985  track->time_scale = 1.0;
1986  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1987  1000 * 1000 * 1000); /* 64 bit pts in ns */
1988 
1989  /* convert the delay from ns to the track timebase */
1990  track->codec_delay = av_rescale_q(track->codec_delay,
1991  (AVRational){ 1, 1000000000 },
1992  st->time_base);
1993 
1994  st->codec->codec_id = codec_id;
1995 
1996  if (strcmp(track->language, "und"))
1997  av_dict_set(&st->metadata, "language", track->language, 0);
1998  av_dict_set(&st->metadata, "title", track->name, 0);
1999 
2000  if (track->flag_default)
2002  if (track->flag_forced)
2004 
2005  if (!st->codec->extradata) {
2006  if (extradata) {
2007  st->codec->extradata = extradata;
2008  st->codec->extradata_size = extradata_size;
2009  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2010  if (ff_alloc_extradata(st->codec, track->codec_priv.size))
2011  return AVERROR(ENOMEM);
2012  memcpy(st->codec->extradata,
2013  track->codec_priv.data + extradata_offset,
2014  track->codec_priv.size);
2015  }
2016  }
2017 
2018  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2020 
2022  st->codec->codec_tag = fourcc;
2023  if (bit_depth >= 0)
2025  st->codec->width = track->video.pixel_width;
2026  st->codec->height = track->video.pixel_height;
2028  &st->sample_aspect_ratio.den,
2029  st->codec->height * track->video.display_width,
2030  st->codec->width * track->video.display_height,
2031  255);
2032  if (st->codec->codec_id != AV_CODEC_ID_HEVC)
2034 
2035  if (track->default_duration) {
2037  1000000000, track->default_duration, 30000);
2038 #if FF_API_R_FRAME_RATE
2039  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2040  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2041  st->r_frame_rate = st->avg_frame_rate;
2042 #endif
2043  }
2044 
2045  /* export stereo mode flag as metadata tag */
2047  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2048 
2049  /* export alpha mode flag as metadata tag */
2050  if (track->video.alpha_mode)
2051  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2052 
2053  /* if we have virtual track, mark the real tracks */
2054  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2055  char buf[32];
2056  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2057  continue;
2058  snprintf(buf, sizeof(buf), "%s_%d",
2059  ff_matroska_video_stereo_plane[planes[j].type], i);
2060  for (k=0; k < matroska->tracks.nb_elem; k++)
2061  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2062  av_dict_set(&tracks[k].stream->metadata,
2063  "stereo_mode", buf, 0);
2064  break;
2065  }
2066  }
2067  // add stream level stereo3d side data if it is a supported format
2069  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2070  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2071  if (ret < 0)
2072  return ret;
2073  }
2074  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2076  st->codec->sample_rate = track->audio.out_samplerate;
2077  st->codec->channels = track->audio.channels;
2078  if (!st->codec->bits_per_coded_sample)
2079  st->codec->bits_per_coded_sample = track->audio.bitdepth;
2080  if (st->codec->codec_id == AV_CODEC_ID_MP3)
2082  else if (st->codec->codec_id != AV_CODEC_ID_AAC)
2084  if (track->codec_delay > 0) {
2085  st->codec->delay = av_rescale_q(track->codec_delay,
2086  st->time_base,
2087  (AVRational){1, st->codec->sample_rate});
2088  }
2089  if (track->seek_preroll > 0) {
2091  av_rescale_q(track->seek_preroll,
2092  (AVRational){1, 1000000000},
2093  (AVRational){1, st->codec->sample_rate}));
2094  }
2095  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2097 
2098  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2100  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2102  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2104  }
2105  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2107  if (st->codec->codec_id == AV_CODEC_ID_ASS)
2108  matroska->contains_ssa = 1;
2109  }
2110  }
2111 
2112  return 0;
2113 }
2114 
2116 {
2117  MatroskaDemuxContext *matroska = s->priv_data;
2118  EbmlList *attachments_list = &matroska->attachments;
2119  EbmlList *chapters_list = &matroska->chapters;
2120  MatroskaAttachment *attachments;
2121  MatroskaChapter *chapters;
2122  uint64_t max_start = 0;
2123  int64_t pos;
2124  Ebml ebml = { 0 };
2125  int i, j, res;
2126 
2127  matroska->ctx = s;
2128  matroska->cues_parsing_deferred = 1;
2129 
2130  /* First read the EBML header. */
2131  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2132  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2133  ebml_free(ebml_syntax, &ebml);
2134  return AVERROR_INVALIDDATA;
2135  }
2136  if (ebml.version > EBML_VERSION ||
2137  ebml.max_size > sizeof(uint64_t) ||
2138  ebml.id_length > sizeof(uint32_t) ||
2139  ebml.doctype_version > 3) {
2140  av_log(matroska->ctx, AV_LOG_ERROR,
2141  "EBML header using unsupported features\n"
2142  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2143  ebml.version, ebml.doctype, ebml.doctype_version);
2144  ebml_free(ebml_syntax, &ebml);
2145  return AVERROR_PATCHWELCOME;
2146  } else if (ebml.doctype_version == 3) {
2147  av_log(matroska->ctx, AV_LOG_WARNING,
2148  "EBML header using unsupported features\n"
2149  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2150  ebml.version, ebml.doctype, ebml.doctype_version);
2151  }
2152  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2153  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2154  break;
2155  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2156  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2157  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2158  ebml_free(ebml_syntax, &ebml);
2159  return AVERROR_INVALIDDATA;
2160  }
2161  }
2162  ebml_free(ebml_syntax, &ebml);
2163 
2164  /* The next thing is a segment. */
2165  pos = avio_tell(matroska->ctx->pb);
2166  res = ebml_parse(matroska, matroska_segments, matroska);
2167  // try resyncing until we find a EBML_STOP type element.
2168  while (res != 1) {
2169  res = matroska_resync(matroska, pos);
2170  if (res < 0)
2171  return res;
2172  pos = avio_tell(matroska->ctx->pb);
2173  res = ebml_parse(matroska, matroska_segment, matroska);
2174  }
2175  matroska_execute_seekhead(matroska);
2176 
2177  if (!matroska->time_scale)
2178  matroska->time_scale = 1000000;
2179  if (matroska->duration)
2180  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2181  1000 / AV_TIME_BASE;
2182  av_dict_set(&s->metadata, "title", matroska->title, 0);
2183  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2184 
2185  if (matroska->date_utc.size == 8)
2187 
2188  res = matroska_parse_tracks(s);
2189  if (res < 0)
2190  return res;
2191 
2192  attachments = attachments_list->elem;
2193  for (j = 0; j < attachments_list->nb_elem; j++) {
2194  if (!(attachments[j].filename && attachments[j].mime &&
2195  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2196  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2197  } else {
2198  AVStream *st = avformat_new_stream(s, NULL);
2199  if (!st)
2200  break;
2201  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2202  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2204 
2205  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2206  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2207  strlen(ff_mkv_image_mime_tags[i].str))) {
2209  break;
2210  }
2211  }
2212 
2213  attachments[j].stream = st;
2214 
2215  if (st->codec->codec_id != AV_CODEC_ID_NONE) {
2218 
2220  if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2221  return res;
2222  memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2223  st->attached_pic.stream_index = st->index;
2225  } else {
2227  if (ff_alloc_extradata(st->codec, attachments[j].bin.size))
2228  break;
2229  memcpy(st->codec->extradata, attachments[j].bin.data,
2230  attachments[j].bin.size);
2231 
2232  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2233  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2234  strlen(ff_mkv_mime_tags[i].str))) {
2235  st->codec->codec_id = ff_mkv_mime_tags[i].id;
2236  break;
2237  }
2238  }
2239  }
2240  }
2241  }
2242 
2243  chapters = chapters_list->elem;
2244  for (i = 0; i < chapters_list->nb_elem; i++)
2245  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2246  (max_start == 0 || chapters[i].start > max_start)) {
2247  chapters[i].chapter =
2248  avpriv_new_chapter(s, chapters[i].uid,
2249  (AVRational) { 1, 1000000000 },
2250  chapters[i].start, chapters[i].end,
2251  chapters[i].title);
2252  if (chapters[i].chapter) {
2253  av_dict_set(&chapters[i].chapter->metadata,
2254  "title", chapters[i].title, 0);
2255  }
2256  max_start = chapters[i].start;
2257  }
2258 
2259  matroska_add_index_entries(matroska);
2260 
2262 
2263  return 0;
2264 }
2265 
2266 /*
2267  * Put one packet in an application-supplied AVPacket struct.
2268  * Returns 0 on success or -1 on failure.
2269  */
2271  AVPacket *pkt)
2272 {
2273  if (matroska->num_packets > 0) {
2274  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2275  av_freep(&matroska->packets[0]);
2276  if (matroska->num_packets > 1) {
2277  void *newpackets;
2278  memmove(&matroska->packets[0], &matroska->packets[1],
2279  (matroska->num_packets - 1) * sizeof(AVPacket *));
2280  newpackets = av_realloc(matroska->packets,
2281  (matroska->num_packets - 1) *
2282  sizeof(AVPacket *));
2283  if (newpackets)
2284  matroska->packets = newpackets;
2285  } else {
2286  av_freep(&matroska->packets);
2287  matroska->prev_pkt = NULL;
2288  }
2289  matroska->num_packets--;
2290  return 0;
2291  }
2292 
2293  return -1;
2294 }
2295 
2296 /*
2297  * Free all packets in our internal queue.
2298  */
2300 {
2301  matroska->prev_pkt = NULL;
2302  if (matroska->packets) {
2303  int n;
2304  for (n = 0; n < matroska->num_packets; n++) {
2305  av_free_packet(matroska->packets[n]);
2306  av_freep(&matroska->packets[n]);
2307  }
2308  av_freep(&matroska->packets);
2309  matroska->num_packets = 0;
2310  }
2311 }
2312 
2314  int *buf_size, int type,
2315  uint32_t **lace_buf, int *laces)
2316 {
2317  int res = 0, n, size = *buf_size;
2318  uint8_t *data = *buf;
2319  uint32_t *lace_size;
2320 
2321  if (!type) {
2322  *laces = 1;
2323  *lace_buf = av_mallocz(sizeof(int));
2324  if (!*lace_buf)
2325  return AVERROR(ENOMEM);
2326 
2327  *lace_buf[0] = size;
2328  return 0;
2329  }
2330 
2331  av_assert0(size > 0);
2332  *laces = *data + 1;
2333  data += 1;
2334  size -= 1;
2335  lace_size = av_mallocz(*laces * sizeof(int));
2336  if (!lace_size)
2337  return AVERROR(ENOMEM);
2338 
2339  switch (type) {
2340  case 0x1: /* Xiph lacing */
2341  {
2342  uint8_t temp;
2343  uint32_t total = 0;
2344  for (n = 0; res == 0 && n < *laces - 1; n++) {
2345  while (1) {
2346  if (size <= total) {
2347  res = AVERROR_INVALIDDATA;
2348  break;
2349  }
2350  temp = *data;
2351  total += temp;
2352  lace_size[n] += temp;
2353  data += 1;
2354  size -= 1;
2355  if (temp != 0xff)
2356  break;
2357  }
2358  }
2359  if (size <= total) {
2360  res = AVERROR_INVALIDDATA;
2361  break;
2362  }
2363 
2364  lace_size[n] = size - total;
2365  break;
2366  }
2367 
2368  case 0x2: /* fixed-size lacing */
2369  if (size % (*laces)) {
2370  res = AVERROR_INVALIDDATA;
2371  break;
2372  }
2373  for (n = 0; n < *laces; n++)
2374  lace_size[n] = size / *laces;
2375  break;
2376 
2377  case 0x3: /* EBML lacing */
2378  {
2379  uint64_t num;
2380  uint64_t total;
2381  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2382  if (n < 0 || num > INT_MAX) {
2383  av_log(matroska->ctx, AV_LOG_INFO,
2384  "EBML block data error\n");
2385  res = n<0 ? n : AVERROR_INVALIDDATA;
2386  break;
2387  }
2388  data += n;
2389  size -= n;
2390  total = lace_size[0] = num;
2391  for (n = 1; res == 0 && n < *laces - 1; n++) {
2392  int64_t snum;
2393  int r;
2394  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2395  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2396  av_log(matroska->ctx, AV_LOG_INFO,
2397  "EBML block data error\n");
2398  res = r<0 ? r : AVERROR_INVALIDDATA;
2399  break;
2400  }
2401  data += r;
2402  size -= r;
2403  lace_size[n] = lace_size[n - 1] + snum;
2404  total += lace_size[n];
2405  }
2406  if (size <= total) {
2407  res = AVERROR_INVALIDDATA;
2408  break;
2409  }
2410  lace_size[*laces - 1] = size - total;
2411  break;
2412  }
2413  }
2414 
2415  *buf = data;
2416  *lace_buf = lace_size;
2417  *buf_size = size;
2418 
2419  return res;
2420 }
2421 
2423  MatroskaTrack *track, AVStream *st,
2424  uint8_t *data, int size, uint64_t timecode,
2425  int64_t pos)
2426 {
2427  int a = st->codec->block_align;
2428  int sps = track->audio.sub_packet_size;
2429  int cfs = track->audio.coded_framesize;
2430  int h = track->audio.sub_packet_h;
2431  int y = track->audio.sub_packet_cnt;
2432  int w = track->audio.frame_size;
2433  int x;
2434 
2435  if (!track->audio.pkt_cnt) {
2436  if (track->audio.sub_packet_cnt == 0)
2437  track->audio.buf_timecode = timecode;
2438  if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2439  if (size < cfs * h / 2) {
2440  av_log(matroska->ctx, AV_LOG_ERROR,
2441  "Corrupt int4 RM-style audio packet size\n");
2442  return AVERROR_INVALIDDATA;
2443  }
2444  for (x = 0; x < h / 2; x++)
2445  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2446  data + x * cfs, cfs);
2447  } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2448  if (size < w) {
2449  av_log(matroska->ctx, AV_LOG_ERROR,
2450  "Corrupt sipr RM-style audio packet size\n");
2451  return AVERROR_INVALIDDATA;
2452  }
2453  memcpy(track->audio.buf + y * w, data, w);
2454  } else {
2455  if (size < sps * w / sps || h<=0 || w%sps) {
2456  av_log(matroska->ctx, AV_LOG_ERROR,
2457  "Corrupt generic RM-style audio packet size\n");
2458  return AVERROR_INVALIDDATA;
2459  }
2460  for (x = 0; x < w / sps; x++)
2461  memcpy(track->audio.buf +
2462  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2463  data + x * sps, sps);
2464  }
2465 
2466  if (++track->audio.sub_packet_cnt >= h) {
2467  if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2468  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2469  track->audio.sub_packet_cnt = 0;
2470  track->audio.pkt_cnt = h * w / a;
2471  }
2472  }
2473 
2474  while (track->audio.pkt_cnt) {
2475  int ret;
2476  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2477  if (!pkt)
2478  return AVERROR(ENOMEM);
2479 
2480  ret = av_new_packet(pkt, a);
2481  if (ret < 0) {
2482  av_free(pkt);
2483  return ret;
2484  }
2485  memcpy(pkt->data,
2486  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2487  a);
2488  pkt->pts = track->audio.buf_timecode;
2490  pkt->pos = pos;
2491  pkt->stream_index = st->index;
2492  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2493  }
2494 
2495  return 0;
2496 }
2497 
2498 /* reconstruct full wavpack blocks from mangled matroska ones */
2500  uint8_t **pdst, int *size)
2501 {
2502  uint8_t *dst = NULL;
2503  int dstlen = 0;
2504  int srclen = *size;
2505  uint32_t samples;
2506  uint16_t ver;
2507  int ret, offset = 0;
2508 
2509  if (srclen < 12 || track->stream->codec->extradata_size < 2)
2510  return AVERROR_INVALIDDATA;
2511 
2512  ver = AV_RL16(track->stream->codec->extradata);
2513 
2514  samples = AV_RL32(src);
2515  src += 4;
2516  srclen -= 4;
2517 
2518  while (srclen >= 8) {
2519  int multiblock;
2520  uint32_t blocksize;
2521  uint8_t *tmp;
2522 
2523  uint32_t flags = AV_RL32(src);
2524  uint32_t crc = AV_RL32(src + 4);
2525  src += 8;
2526  srclen -= 8;
2527 
2528  multiblock = (flags & 0x1800) != 0x1800;
2529  if (multiblock) {
2530  if (srclen < 4) {
2531  ret = AVERROR_INVALIDDATA;
2532  goto fail;
2533  }
2534  blocksize = AV_RL32(src);
2535  src += 4;
2536  srclen -= 4;
2537  } else
2538  blocksize = srclen;
2539 
2540  if (blocksize > srclen) {
2541  ret = AVERROR_INVALIDDATA;
2542  goto fail;
2543  }
2544 
2545  tmp = av_realloc(dst, dstlen + blocksize + 32);
2546  if (!tmp) {
2547  ret = AVERROR(ENOMEM);
2548  goto fail;
2549  }
2550  dst = tmp;
2551  dstlen += blocksize + 32;
2552 
2553  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2554  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2555  AV_WL16(dst + offset + 8, ver); // version
2556  AV_WL16(dst + offset + 10, 0); // track/index_no
2557  AV_WL32(dst + offset + 12, 0); // total samples
2558  AV_WL32(dst + offset + 16, 0); // block index
2559  AV_WL32(dst + offset + 20, samples); // number of samples
2560  AV_WL32(dst + offset + 24, flags); // flags
2561  AV_WL32(dst + offset + 28, crc); // crc
2562  memcpy(dst + offset + 32, src, blocksize); // block data
2563 
2564  src += blocksize;
2565  srclen -= blocksize;
2566  offset += blocksize + 32;
2567  }
2568 
2569  *pdst = dst;
2570  *size = dstlen;
2571 
2572  return 0;
2573 
2574 fail:
2575  av_freep(&dst);
2576  return ret;
2577 }
2578 
2580  MatroskaTrack *track,
2581  AVStream *st,
2582  uint8_t *data, int data_len,
2583  uint64_t timecode,
2584  uint64_t duration,
2585  int64_t pos)
2586 {
2587  AVPacket *pkt;
2588  uint8_t *id, *settings, *text, *buf;
2589  int id_len, settings_len, text_len;
2590  uint8_t *p, *q;
2591  int err;
2592 
2593  if (data_len <= 0)
2594  return AVERROR_INVALIDDATA;
2595 
2596  p = data;
2597  q = data + data_len;
2598 
2599  id = p;
2600  id_len = -1;
2601  while (p < q) {
2602  if (*p == '\r' || *p == '\n') {
2603  id_len = p - id;
2604  if (*p == '\r')
2605  p++;
2606  break;
2607  }
2608  p++;
2609  }
2610 
2611  if (p >= q || *p != '\n')
2612  return AVERROR_INVALIDDATA;
2613  p++;
2614 
2615  settings = p;
2616  settings_len = -1;
2617  while (p < q) {
2618  if (*p == '\r' || *p == '\n') {
2619  settings_len = p - settings;
2620  if (*p == '\r')
2621  p++;
2622  break;
2623  }
2624  p++;
2625  }
2626 
2627  if (p >= q || *p != '\n')
2628  return AVERROR_INVALIDDATA;
2629  p++;
2630 
2631  text = p;
2632  text_len = q - p;
2633  while (text_len > 0) {
2634  const int len = text_len - 1;
2635  const uint8_t c = p[len];
2636  if (c != '\r' && c != '\n')
2637  break;
2638  text_len = len;
2639  }
2640 
2641  if (text_len <= 0)
2642  return AVERROR_INVALIDDATA;
2643 
2644  pkt = av_mallocz(sizeof(*pkt));
2645  if (!pkt)
2646  return AVERROR(ENOMEM);
2647  err = av_new_packet(pkt, text_len);
2648  if (err < 0) {
2649  av_free(pkt);
2650  return AVERROR(err);
2651  }
2652 
2653  memcpy(pkt->data, text, text_len);
2654 
2655  if (id_len > 0) {
2656  buf = av_packet_new_side_data(pkt,
2658  id_len);
2659  if (!buf) {
2660  av_free(pkt);
2661  return AVERROR(ENOMEM);
2662  }
2663  memcpy(buf, id, id_len);
2664  }
2665 
2666  if (settings_len > 0) {
2667  buf = av_packet_new_side_data(pkt,
2669  settings_len);
2670  if (!buf) {
2671  av_free(pkt);
2672  return AVERROR(ENOMEM);
2673  }
2674  memcpy(buf, settings, settings_len);
2675  }
2676 
2677  // Do we need this for subtitles?
2678  // pkt->flags = AV_PKT_FLAG_KEY;
2679 
2680  pkt->stream_index = st->index;
2681  pkt->pts = timecode;
2682 
2683  // Do we need this for subtitles?
2684  // pkt->dts = timecode;
2685 
2686  pkt->duration = duration;
2687  pkt->pos = pos;
2688 
2689  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2690  matroska->prev_pkt = pkt;
2691 
2692  return 0;
2693 }
2694 
2696  MatroskaTrack *track, AVStream *st,
2697  uint8_t *data, int pkt_size,
2698  uint64_t timecode, uint64_t lace_duration,
2699  int64_t pos, int is_keyframe,
2700  uint8_t *additional, uint64_t additional_id, int additional_size,
2701  int64_t discard_padding)
2702 {
2703  MatroskaTrackEncoding *encodings = track->encodings.elem;
2704  uint8_t *pkt_data = data;
2705  int offset = 0, res;
2706  AVPacket *pkt;
2707 
2708  if (encodings && !encodings->type && encodings->scope & 1) {
2709  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2710  if (res < 0)
2711  return res;
2712  }
2713 
2714  if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2715  uint8_t *wv_data;
2716  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2717  if (res < 0) {
2718  av_log(matroska->ctx, AV_LOG_ERROR,
2719  "Error parsing a wavpack block.\n");
2720  goto fail;
2721  }
2722  if (pkt_data != data)
2723  av_freep(&pkt_data);
2724  pkt_data = wv_data;
2725  }
2726 
2727  if (st->codec->codec_id == AV_CODEC_ID_PRORES &&
2728  AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
2729  offset = 8;
2730 
2731  pkt = av_mallocz(sizeof(AVPacket));
2732  if (!pkt) {
2733  if (pkt_data != data)
2734  av_freep(&pkt_data);
2735  return AVERROR(ENOMEM);
2736  }
2737  /* XXX: prevent data copy... */
2738  if (av_new_packet(pkt, pkt_size + offset) < 0) {
2739  av_free(pkt);
2740  res = AVERROR(ENOMEM);
2741  goto fail;
2742  }
2743 
2744  if (st->codec->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
2745  uint8_t *buf = pkt->data;
2746  bytestream_put_be32(&buf, pkt_size);
2747  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2748  }
2749 
2750  memcpy(pkt->data + offset, pkt_data, pkt_size);
2751 
2752  if (pkt_data != data)
2753  av_freep(&pkt_data);
2754 
2755  pkt->flags = is_keyframe;
2756  pkt->stream_index = st->index;
2757 
2758  if (additional_size > 0) {
2759  uint8_t *side_data = av_packet_new_side_data(pkt,
2761  additional_size + 8);
2762  if (!side_data) {
2763  av_free_packet(pkt);
2764  av_free(pkt);
2765  return AVERROR(ENOMEM);
2766  }
2767  AV_WB64(side_data, additional_id);
2768  memcpy(side_data + 8, additional, additional_size);
2769  }
2770 
2771  if (discard_padding) {
2772  uint8_t *side_data = av_packet_new_side_data(pkt,
2774  10);
2775  if (!side_data) {
2776  av_free_packet(pkt);
2777  av_free(pkt);
2778  return AVERROR(ENOMEM);
2779  }
2780  AV_WL32(side_data, 0);
2781  AV_WL32(side_data + 4, av_rescale_q(discard_padding,
2782  (AVRational){1, 1000000000},
2783  (AVRational){1, st->codec->sample_rate}));
2784  }
2785 
2786  if (track->ms_compat)
2787  pkt->dts = timecode;
2788  else
2789  pkt->pts = timecode;
2790  pkt->pos = pos;
2791  if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
2792  /*
2793  * For backward compatibility.
2794  * Historically, we have put subtitle duration
2795  * in convergence_duration, on the off chance
2796  * that the time_scale is less than 1us, which
2797  * could result in a 32bit overflow on the
2798  * normal duration field.
2799  */
2800  pkt->convergence_duration = lace_duration;
2801  }
2802 
2803  if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE ||
2804  lace_duration <= INT_MAX) {
2805  /*
2806  * For non subtitle tracks, just store the duration
2807  * as normal.
2808  *
2809  * If it's a subtitle track and duration value does
2810  * not overflow a uint32, then also store it normally.
2811  */
2812  pkt->duration = lace_duration;
2813  }
2814 
2815  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2816  matroska->prev_pkt = pkt;
2817 
2818  return 0;
2819 
2820 fail:
2821  if (pkt_data != data)
2822  av_freep(&pkt_data);
2823  return res;
2824 }
2825 
2827  int size, int64_t pos, uint64_t cluster_time,
2828  uint64_t block_duration, int is_keyframe,
2829  uint8_t *additional, uint64_t additional_id, int additional_size,
2830  int64_t cluster_pos, int64_t discard_padding)
2831 {
2832  uint64_t timecode = AV_NOPTS_VALUE;
2833  MatroskaTrack *track;
2834  int res = 0;
2835  AVStream *st;
2836  int16_t block_time;
2837  uint32_t *lace_size = NULL;
2838  int n, flags, laces = 0;
2839  uint64_t num;
2840  int trust_default_duration = 1;
2841 
2842  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2843  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2844  return n;
2845  }
2846  data += n;
2847  size -= n;
2848 
2849  track = matroska_find_track_by_num(matroska, num);
2850  if (!track || !track->stream) {
2851  av_log(matroska->ctx, AV_LOG_INFO,
2852  "Invalid stream %"PRIu64" or size %u\n", num, size);
2853  return AVERROR_INVALIDDATA;
2854  } else if (size <= 3)
2855  return 0;
2856  st = track->stream;
2857  if (st->discard >= AVDISCARD_ALL)
2858  return res;
2859  av_assert1(block_duration != AV_NOPTS_VALUE);
2860 
2861  block_time = sign_extend(AV_RB16(data), 16);
2862  data += 2;
2863  flags = *data++;
2864  size -= 3;
2865  if (is_keyframe == -1)
2866  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2867 
2868  if (cluster_time != (uint64_t) -1 &&
2869  (block_time >= 0 || cluster_time >= -block_time)) {
2870  timecode = cluster_time + block_time - track->codec_delay;
2871  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2872  timecode < track->end_timecode)
2873  is_keyframe = 0; /* overlapping subtitles are not key frame */
2874  if (is_keyframe)
2875  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2877  }
2878 
2879  if (matroska->skip_to_keyframe &&
2880  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2881  if (timecode < matroska->skip_to_timecode)
2882  return res;
2883  if (is_keyframe)
2884  matroska->skip_to_keyframe = 0;
2885  else if (!st->skip_to_keyframe) {
2886  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
2887  matroska->skip_to_keyframe = 0;
2888  }
2889  }
2890 
2891  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2892  &lace_size, &laces);
2893 
2894  if (res)
2895  goto end;
2896 
2897  if (track->audio.samplerate == 8000) {
2898  // If this is needed for more codecs, then add them here
2899  if (st->codec->codec_id == AV_CODEC_ID_AC3) {
2900  if (track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
2901  trust_default_duration = 0;
2902  }
2903  }
2904 
2905  if (!block_duration && trust_default_duration)
2906  block_duration = track->default_duration * laces / matroska->time_scale;
2907 
2908  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
2909  track->end_timecode =
2910  FFMAX(track->end_timecode, timecode + block_duration);
2911 
2912  for (n = 0; n < laces; n++) {
2913  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
2914 
2915  if (lace_size[n] > size) {
2916  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
2917  break;
2918  }
2919 
2920  if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2921  st->codec->codec_id == AV_CODEC_ID_COOK ||
2922  st->codec->codec_id == AV_CODEC_ID_SIPR ||
2923  st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2924  st->codec->block_align && track->audio.sub_packet_size) {
2925  res = matroska_parse_rm_audio(matroska, track, st, data,
2926  lace_size[n],
2927  timecode, pos);
2928  if (res)
2929  goto end;
2930 
2931  } else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
2932  res = matroska_parse_webvtt(matroska, track, st,
2933  data, lace_size[n],
2934  timecode, lace_duration,
2935  pos);
2936  if (res)
2937  goto end;
2938  } else {
2939  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2940  timecode, lace_duration, pos,
2941  !n ? is_keyframe : 0,
2942  additional, additional_id, additional_size,
2943  discard_padding);
2944  if (res)
2945  goto end;
2946  }
2947 
2948  if (timecode != AV_NOPTS_VALUE)
2949  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
2950  data += lace_size[n];
2951  size -= lace_size[n];
2952  }
2953 
2954 end:
2955  av_free(lace_size);
2956  return res;
2957 }
2958 
2960 {
2961  EbmlList *blocks_list;
2962  MatroskaBlock *blocks;
2963  int i, res;
2964  res = ebml_parse(matroska,
2965  matroska_cluster_incremental_parsing,
2966  &matroska->current_cluster);
2967  if (res == 1) {
2968  /* New Cluster */
2969  if (matroska->current_cluster_pos)
2970  ebml_level_end(matroska);
2971  ebml_free(matroska_cluster, &matroska->current_cluster);
2972  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2973  matroska->current_cluster_num_blocks = 0;
2974  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2975  matroska->prev_pkt = NULL;
2976  /* sizeof the ID which was already read */
2977  if (matroska->current_id)
2978  matroska->current_cluster_pos -= 4;
2979  res = ebml_parse(matroska,
2980  matroska_clusters_incremental,
2981  &matroska->current_cluster);
2982  /* Try parsing the block again. */
2983  if (res == 1)
2984  res = ebml_parse(matroska,
2985  matroska_cluster_incremental_parsing,
2986  &matroska->current_cluster);
2987  }
2988 
2989  if (!res &&
2990  matroska->current_cluster_num_blocks <
2991  matroska->current_cluster.blocks.nb_elem) {
2992  blocks_list = &matroska->current_cluster.blocks;
2993  blocks = blocks_list->elem;
2994 
2995  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2996  i = blocks_list->nb_elem - 1;
2997  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2998  int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
2999  uint8_t* additional = blocks[i].additional.size > 0 ?
3000  blocks[i].additional.data : NULL;
3001  if (!blocks[i].non_simple)
3002  blocks[i].duration = 0;
3003  res = matroska_parse_block(matroska, blocks[i].bin.data,
3004  blocks[i].bin.size, blocks[i].bin.pos,
3005  matroska->current_cluster.timecode,
3006  blocks[i].duration, is_keyframe,
3007  additional, blocks[i].additional_id,
3008  blocks[i].additional.size,
3009  matroska->current_cluster_pos,
3010  blocks[i].discard_padding);
3011  }
3012  }
3013 
3014  return res;
3015 }
3016 
3018 {
3019  MatroskaCluster cluster = { 0 };
3020  EbmlList *blocks_list;
3021  MatroskaBlock *blocks;
3022  int i, res;
3023  int64_t pos;
3024 
3025  if (!matroska->contains_ssa)
3026  return matroska_parse_cluster_incremental(matroska);
3027  pos = avio_tell(matroska->ctx->pb);
3028  matroska->prev_pkt = NULL;
3029  if (matroska->current_id)
3030  pos -= 4; /* sizeof the ID which was already read */
3031  res = ebml_parse(matroska, matroska_clusters, &cluster);
3032  blocks_list = &cluster.blocks;
3033  blocks = blocks_list->elem;
3034  for (i = 0; i < blocks_list->nb_elem; i++)
3035  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3036  int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3037  res = matroska_parse_block(matroska, blocks[i].bin.data,
3038  blocks[i].bin.size, blocks[i].bin.pos,
3039  cluster.timecode, blocks[i].duration,
3040  is_keyframe, NULL, 0, 0, pos,
3041  blocks[i].discard_padding);
3042  }
3043  ebml_free(matroska_cluster, &cluster);
3044  return res;
3045 }
3046 
3048 {
3049  MatroskaDemuxContext *matroska = s->priv_data;
3050 
3051  while (matroska_deliver_packet(matroska, pkt)) {
3052  int64_t pos = avio_tell(matroska->ctx->pb);
3053  if (matroska->done)
3054  return AVERROR_EOF;
3055  if (matroska_parse_cluster(matroska) < 0)
3056  matroska_resync(matroska, pos);
3057  }
3058 
3059  return 0;
3060 }
3061 
3062 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3063  int64_t timestamp, int flags)
3064 {
3065  MatroskaDemuxContext *matroska = s->priv_data;
3066  MatroskaTrack *tracks = NULL;
3067  AVStream *st = s->streams[stream_index];
3068  int i, index, index_sub, index_min;
3069 
3070  /* Parse the CUES now since we need the index data to seek. */
3071  if (matroska->cues_parsing_deferred > 0) {
3072  matroska->cues_parsing_deferred = 0;
3073  matroska_parse_cues(matroska);
3074  }
3075 
3076  if (!st->nb_index_entries)
3077  goto err;
3078  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3079 
3080  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3081  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3082  SEEK_SET);
3083  matroska->current_id = 0;
3084  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3085  matroska_clear_queue(matroska);
3086  if (matroska_parse_cluster(matroska) < 0)
3087  break;
3088  }
3089  }
3090 
3091  matroska_clear_queue(matroska);
3092  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3093  goto err;
3094 
3095  index_min = index;
3096  tracks = matroska->tracks.elem;
3097  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3098  tracks[i].audio.pkt_cnt = 0;
3099  tracks[i].audio.sub_packet_cnt = 0;
3100  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3101  tracks[i].end_timecode = 0;
3102  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3103  tracks[i].stream &&
3104  tracks[i].stream->discard != AVDISCARD_ALL) {
3105  index_sub = av_index_search_timestamp(
3106  tracks[i].stream, st->index_entries[index].timestamp,
3108  while (index_sub >= 0 &&
3109  index_min > 0 &&
3110  tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3111  st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3112  index_min--;
3113  }
3114  }
3115 
3116  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3117  matroska->current_id = 0;
3118  if (flags & AVSEEK_FLAG_ANY) {
3119  st->skip_to_keyframe = 0;
3120  matroska->skip_to_timecode = timestamp;
3121  } else {
3122  st->skip_to_keyframe = 1;
3123  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3124  }
3125  matroska->skip_to_keyframe = 1;
3126  matroska->done = 0;
3127  matroska->num_levels = 0;
3128  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3129  return 0;
3130 err:
3131  // slightly hackish but allows proper fallback to
3132  // the generic seeking code.
3133  matroska_clear_queue(matroska);
3134  matroska->current_id = 0;
3135  st->skip_to_keyframe =
3136  matroska->skip_to_keyframe = 0;
3137  matroska->done = 0;
3138  matroska->num_levels = 0;
3139  return -1;
3140 }
3141 
3143 {
3144  MatroskaDemuxContext *matroska = s->priv_data;
3145  MatroskaTrack *tracks = matroska->tracks.elem;
3146  int n;
3147 
3148  matroska_clear_queue(matroska);
3149 
3150  for (n = 0; n < matroska->tracks.nb_elem; n++)
3151  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3152  av_freep(&tracks[n].audio.buf);
3153  ebml_free(matroska_cluster, &matroska->current_cluster);
3154  ebml_free(matroska_segment, matroska);
3155 
3156  return 0;
3157 }
3158 
3159 typedef struct {
3160  int64_t start_time_ns;
3161  int64_t end_time_ns;
3162  int64_t start_offset;
3163  int64_t end_offset;
3164 } CueDesc;
3165 
3166 /* This function searches all the Cues and returns the CueDesc corresponding the
3167  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3168  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3169  */
3170 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3171  MatroskaDemuxContext *matroska = s->priv_data;
3172  CueDesc cue_desc;
3173  int i;
3174  int nb_index_entries = s->streams[0]->nb_index_entries;
3175  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3176  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3177  for (i = 1; i < nb_index_entries; i++) {
3178  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3179  index_entries[i].timestamp * matroska->time_scale > ts) {
3180  break;
3181  }
3182  }
3183  --i;
3184  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3185  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3186  if (i != nb_index_entries - 1) {
3187  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3188  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3189  } else {
3190  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3191  // FIXME: this needs special handling for files where Cues appear
3192  // before Clusters. the current logic assumes Cues appear after
3193  // Clusters.
3194  cue_desc.end_offset = cues_start - matroska->segment_start;
3195  }
3196  return cue_desc;
3197 }
3198 
3200 {
3201  MatroskaDemuxContext *matroska = s->priv_data;
3202  int64_t cluster_pos, before_pos;
3203  int index, rv = 1;
3204  if (s->streams[0]->nb_index_entries <= 0) return 0;
3205  // seek to the first cluster using cues.
3206  index = av_index_search_timestamp(s->streams[0], 0, 0);
3207  if (index < 0) return 0;
3208  cluster_pos = s->streams[0]->index_entries[index].pos;
3209  before_pos = avio_tell(s->pb);
3210  while (1) {
3211  int64_t cluster_id = 0, cluster_length = 0;
3212  AVPacket *pkt;
3213  avio_seek(s->pb, cluster_pos, SEEK_SET);
3214  // read cluster id and length
3215  ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3216  ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3217  if (cluster_id != 0xF43B675) { // done with all clusters
3218  break;
3219  }
3220  avio_seek(s->pb, cluster_pos, SEEK_SET);
3221  matroska->current_id = 0;
3222  matroska_clear_queue(matroska);
3223  if (matroska_parse_cluster(matroska) < 0 ||
3224  matroska->num_packets <= 0) {
3225  break;
3226  }
3227  pkt = matroska->packets[0];
3228  cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3229  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3230  rv = 0;
3231  break;
3232  }
3233  }
3234  avio_seek(s->pb, before_pos, SEEK_SET);
3235  return rv;
3236 }
3237 
3238 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3239  double min_buffer, double* buffer,
3240  double* sec_to_download, AVFormatContext *s,
3241  int64_t cues_start)
3242 {
3243  double nano_seconds_per_second = 1000000000.0;
3244  double time_sec = time_ns / nano_seconds_per_second;
3245  int rv = 0;
3246  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3247  int64_t end_time_ns = time_ns + time_to_search_ns;
3248  double sec_downloaded = 0.0;
3249  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3250  if (desc_curr.start_time_ns == -1)
3251  return -1;
3252  *sec_to_download = 0.0;
3253 
3254  // Check for non cue start time.
3255  if (time_ns > desc_curr.start_time_ns) {
3256  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3257  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3258  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3259  double timeToDownload = (cueBytes * 8.0) / bps;
3260 
3261  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3262  *sec_to_download += timeToDownload;
3263 
3264  // Check if the search ends within the first cue.
3265  if (desc_curr.end_time_ns >= end_time_ns) {
3266  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3267  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3268  sec_downloaded = percent_to_sub * sec_downloaded;
3269  *sec_to_download = percent_to_sub * *sec_to_download;
3270  }
3271 
3272  if ((sec_downloaded + *buffer) <= min_buffer) {
3273  return 1;
3274  }
3275 
3276  // Get the next Cue.
3277  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3278  }
3279 
3280  while (desc_curr.start_time_ns != -1) {
3281  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3282  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3283  double desc_sec = desc_ns / nano_seconds_per_second;
3284  double bits = (desc_bytes * 8.0);
3285  double time_to_download = bits / bps;
3286 
3287  sec_downloaded += desc_sec - time_to_download;
3288  *sec_to_download += time_to_download;
3289 
3290  if (desc_curr.end_time_ns >= end_time_ns) {
3291  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3292  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3293  sec_downloaded = percent_to_sub * sec_downloaded;
3294  *sec_to_download = percent_to_sub * *sec_to_download;
3295 
3296  if ((sec_downloaded + *buffer) <= min_buffer)
3297  rv = 1;
3298  break;
3299  }
3300 
3301  if ((sec_downloaded + *buffer) <= min_buffer) {
3302  rv = 1;
3303  break;
3304  }
3305 
3306  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3307  }
3308  *buffer = *buffer + sec_downloaded;
3309  return rv;
3310 }
3311 
3312 /* This function computes the bandwidth of the WebM file with the help of
3313  * buffer_size_after_time_downloaded() function. Both of these functions are
3314  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3315  * Matroska parsing mechanism.
3316  *
3317  * Returns the bandwidth of the file on success; -1 on error.
3318  * */
3319 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3320 {
3321  MatroskaDemuxContext *matroska = s->priv_data;
3322  AVStream *st = s->streams[0];
3323  double bandwidth = 0.0;
3324  int i;
3325 
3326  for (i = 0; i < st->nb_index_entries; i++) {
3327  int64_t prebuffer_ns = 1000000000;
3328  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3329  double nano_seconds_per_second = 1000000000.0;
3330  int64_t prebuffered_ns = time_ns + prebuffer_ns;
3331  double prebuffer_bytes = 0.0;
3332  int64_t temp_prebuffer_ns = prebuffer_ns;
3333  int64_t pre_bytes, pre_ns;
3334  double pre_sec, prebuffer, bits_per_second;
3335  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3336 
3337  // Start with the first Cue.
3338  CueDesc desc_end = desc_beg;
3339 
3340  // Figure out how much data we have downloaded for the prebuffer. This will
3341  // be used later to adjust the bits per sample to try.
3342  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3343  // Prebuffered the entire Cue.
3344  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3345  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3346  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3347  }
3348  if (desc_end.start_time_ns == -1) {
3349  // The prebuffer is larger than the duration.
3350  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3351  return -1;
3352  bits_per_second = 0.0;
3353  } else {
3354  // The prebuffer ends in the last Cue. Estimate how much data was
3355  // prebuffered.
3356  pre_bytes = desc_end.end_offset - desc_end.start_offset;
3357  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3358  pre_sec = pre_ns / nano_seconds_per_second;
3359  prebuffer_bytes +=
3360  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3361 
3362  prebuffer = prebuffer_ns / nano_seconds_per_second;
3363 
3364  // Set this to 0.0 in case our prebuffer buffers the entire video.
3365  bits_per_second = 0.0;
3366  do {
3367  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3368  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3369  double desc_sec = desc_ns / nano_seconds_per_second;
3370  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3371 
3372  // Drop the bps by the percentage of bytes buffered.
3373  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3374  double mod_bits_per_second = calc_bits_per_second * percent;
3375 
3376  if (prebuffer < desc_sec) {
3377  double search_sec =
3378  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3379 
3380  // Add 1 so the bits per second should be a little bit greater than file
3381  // datarate.
3382  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3383  const double min_buffer = 0.0;
3384  double buffer = prebuffer;
3385  double sec_to_download = 0.0;
3386 
3387  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3388  min_buffer, &buffer, &sec_to_download,
3389  s, cues_start);
3390  if (rv < 0) {
3391  return -1;
3392  } else if (rv == 0) {
3393  bits_per_second = (double)(bps);
3394  break;
3395  }
3396  }
3397 
3398  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3399  } while (desc_end.start_time_ns != -1);
3400  }
3401  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3402  }
3403  return (int64_t)bandwidth;
3404 }
3405 
3407 {
3408  MatroskaDemuxContext *matroska = s->priv_data;
3409  EbmlList *seekhead_list = &matroska->seekhead;
3410  MatroskaSeekhead *seekhead = seekhead_list->elem;
3411  char *buf;
3412  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3413  int i;
3414 
3415  // determine cues start and end positions
3416  for (i = 0; i < seekhead_list->nb_elem; i++)
3417  if (seekhead[i].id == MATROSKA_ID_CUES)
3418  break;
3419 
3420  if (i >= seekhead_list->nb_elem) return -1;
3421 
3422  before_pos = avio_tell(matroska->ctx->pb);
3423  cues_start = seekhead[i].pos + matroska->segment_start;
3424  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3425  // cues_end is computed as cues_start + cues_length + length of the
3426  // Cues element ID + EBML length of the Cues element. cues_end is
3427  // inclusive and the above sum is reduced by 1.
3428  uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3429  bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3430  bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3431  cues_end = cues_start + cues_length + bytes_read - 1;
3432  }
3433  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3434  if (cues_start == -1 || cues_end == -1) return -1;
3435 
3436  // parse the cues
3437  matroska_parse_cues(matroska);
3438 
3439  // cues start
3440  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3441 
3442  // cues end
3443  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3444 
3445  // bandwidth
3446  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3447  if (bandwidth < 0) return -1;
3448  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3449 
3450  // check if all clusters start with key frames
3452 
3453  // store cue point timestamps as a comma separated list for checking subsegment alignment in
3454  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3455  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3456  if (!buf) return -1;
3457  strcpy(buf, "");
3458  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3459  snprintf(buf, (i + 1) * 20 * sizeof(char),
3460  "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3461  if (i != s->streams[0]->nb_index_entries - 1)
3462  strncat(buf, ",", sizeof(char));
3463  }
3464  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3465  av_free(buf);
3466 
3467  return 0;
3468 }
3469 
3471 {
3472  char *buf;
3473  int ret = matroska_read_header(s);
3474  MatroskaTrack *tracks;
3475  MatroskaDemuxContext *matroska = s->priv_data;
3476  if (ret) {
3477  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3478  return -1;
3479  }
3480  if (!s->nb_streams) {
3482  av_log(s, AV_LOG_ERROR, "No streams found\n");
3483  return AVERROR_INVALIDDATA;
3484  }
3485 
3486  if (!matroska->is_live) {
3487  buf = av_asprintf("%g", matroska->duration);
3488  if (!buf) return AVERROR(ENOMEM);
3489  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3490  av_free(buf);
3491 
3492  // initialization range
3493  // 5 is the offset of Cluster ID.
3495  }
3496 
3497  // basename of the file
3498  buf = strrchr(s->filename, '/');
3499  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3500 
3501  // track number
3502  tracks = matroska->tracks.elem;
3503  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3504 
3505  // parse the cues and populate Cue related fields
3506  return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3507 }
3508 
3510 {
3511  return AVERROR_EOF;
3512 }
3513 
3514 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3515 static const AVOption options[] = {
3516  { "live", "flag indicating that the input is a live file that only has the headers.", OFFSET(is_live), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
3517  { NULL },
3518 };
3519 
3520 static const AVClass webm_dash_class = {
3521  .class_name = "WebM DASH Manifest demuxer",
3522  .item_name = av_default_item_name,
3523  .option = options,
3524  .version = LIBAVUTIL_VERSION_INT,
3525 };
3526 
3528  .name = "matroska,webm",
3529  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3530  .extensions = "mkv,mk3d,mka,mks",
3531  .priv_data_size = sizeof(MatroskaDemuxContext),
3537  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3538 };
3539 
3541  .name = "webm_dash_manifest",
3542  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3543  .priv_data_size = sizeof(MatroskaDemuxContext),
3547  .priv_class = &webm_dash_class,
3548 };
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
const char * s
Definition: matroskadec.c:91
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2296
#define AV_DISPOSITION_METADATA
Definition: avformat.h:838
union EbmlSyntax::@167 def
#define NULL
Definition: coverity.c:32
#define MATROSKA_ID_BLOCKADDID
Definition: matroska.h:194
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:104
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:421
static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int size, uint64_t timecode, int64_t pos)
Definition: matroskadec.c:2422
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
#define MATROSKA_ID_VIDEOFLAGINTERLACED
Definition: matroska.h:121
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static const EbmlSyntax matroska_blockgroup[]
Definition: matroskadec.c:598
uint64_t seek_preroll
Definition: matroskadec.c:181
const char *const ff_matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT]
Definition: matroska.c:145
static const EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:529
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1402
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:284
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1354
uint64_t type
Definition: matroskadec.c:172
static const EbmlSyntax matroska_tracks[]
Definition: matroskadec.c:458
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:101
static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3509
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2270
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
uint64_t version
Definition: matroskadec.c:108
AVOption.
Definition: opt.h:255
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:3527
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static int is_keyframe(NalUnitType naltype)
Definition: libx265.c:50
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:1749
enum AVCodecID id
Definition: mxfenc.c:102
static const EbmlSyntax matroska_info[]
Definition: matroskadec.c:344
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:156
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2783
#define MATROSKA_ID_CODECPRIVATE
Definition: matroska.h:89
const unsigned char ff_sipr_subpk_size[4]
Definition: rmsipr.c:25
#define MATROSKA_ID_TAGTARGETS_TYPE
Definition: matroska.h:174
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static int ebml_level_end(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:695
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
#define INITIALIZATION_RANGE
Definition: matroska.h:289
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1458
#define AV_RB64
Definition: intreadwrite.h:164
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:916
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3199
else temp
Definition: vf_mcdeint.c:257
static const EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:539
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4098
int64_t pos
Definition: avformat.h:796
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:137
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:131
uint64_t chapteruid
Definition: matroskadec.c:234
static const EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:355
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2298
static av_always_inline float av_int2float(uint32_t i)
Reinterpret a 32-bit integer as a float.
Definition: intfloat.h:40
#define MATROSKA_ID_TRACKFLAGDEFAULT
Definition: matroska.h:99
uint64_t additional_id
Definition: matroskadec.c:323
EbmlList tag
Definition: matroskadec.c:240
uint64_t uid
Definition: matroskadec.c:171
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
MatroskaCluster current_cluster
Definition: matroskadec.c:309
static int matroska_parse_frame(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int pkt_size, uint64_t timecode, uint64_t lace_duration, int64_t pos, int is_keyframe, uint8_t *additional, uint64_t additional_id, int additional_size, int64_t discard_padding)
Definition: matroskadec.c:2695
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:926
#define MATROSKA_ID_TAGTARGETS_ATTACHUID
Definition: matroska.h:178
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:855
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:189
const char * b
Definition: vf_curves.c:109
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:204
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:210
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1057
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:201
uint64_t flag_forced
Definition: matroskadec.c:180
uint64_t max_size
Definition: matroskadec.c:109
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:177
#define AV_RL16
Definition: intreadwrite.h:42
uint64_t flag_default
Definition: matroskadec.c:179
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:126
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:124
static const EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:407
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:132
char * name
Definition: matroskadec.c:223
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:279
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
Put a string representing the codec tag codec_tag in buf.
Definition: utils.c:3077
int version
Definition: avisynth_c.h:629
discard all
Definition: avcodec.h:689
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:270
static AVPacket pkt
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:160
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:679
MatroskaTrackAudio audio
Definition: matroskadec.c:183
uint64_t duration
Definition: matroskadec.c:319
const struct EbmlSyntax * n
Definition: matroskadec.c:92
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:223
#define MATROSKA_ID_CLUSTERTIMECODE
Definition: matroska.h:188
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2309
#define MATROSKA_ID_ENCODINGENCALGO
Definition: matroska.h:144
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:217
static const EbmlSyntax matroska_track_plane[]
Definition: matroskadec.c:412
#define MATROSKA_ID_TRACKCONTENTENCODINGS
Definition: matroska.h:105
#define AV_LZO_OUTPUT_FULL
decoded data did not fit into output buffer
Definition: lzo.h:39
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:3860
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:207
Format I/O context.
Definition: avformat.h:1285
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:226
UID uid
Definition: mxfenc.c:1818
void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
Update cur_dts of all streams based on the given timestamp and AVStream.
Definition: utils.c:1663
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:106
static const EbmlSyntax matroska_cluster[]
Definition: matroskadec.c:610
#define MATROSKA_ID_CODECDOWNLOADURL
Definition: matroska.h:92
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
int64_t end_timecode
Definition: matroskadec.c:189
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:3470
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
Definition: matroskadec.c:796
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1398
Public dictionary API.
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:181
static const EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:504
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1015
uint64_t pixel_height
Definition: matroskadec.c:137
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:321
uint8_t bits
Definition: crc.c:295
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint8_t
#define MATROSKA_ID_CHAPLANG
Definition: matroska.h:220
#define av_malloc(s)
uint64_t stereo_mode
Definition: matroskadec.c:139
MatroskaTrackOperation operation
Definition: matroskadec.c:184
MatroskaTrackVideo video
Definition: matroskadec.c:182
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:224
static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start)
Definition: matroskadec.c:3170
void * elem
Definition: matroskadec.c:98
AVOptions.
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:97
MatroskaTrackCompression compression
Definition: matroskadec.c:128
uint8_t * data
Definition: matroskadec.c:103
static av_always_inline av_const int isnan(float x)
Definition: libm.h:96
static int webm_dash_manifest_cues(AVFormatContext *s)
Definition: matroskadec.c:3406
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:71
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:694
uint64_t time
Definition: matroskadec.c:218
#define AV_RB32
Definition: intreadwrite.h:130
int ff_mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
Definition: matroska.c:151
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:117
#define TRACK_NUMBER
Definition: matroska.h:297
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1577
enum AVStreamParseType need_parsing
Definition: avformat.h:1046
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:196
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:175
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:222
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1627
static const EbmlSyntax matroska_segment[]
Definition: matroskadec.c:570
AVStream * stream
Definition: matroskadec.c:200
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3761
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
char * language
Definition: matroskadec.c:176
#define MATROSKA_ID_BLOCKMORE
Definition: matroska.h:193
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1353
#define MATROSKA_ID_CUERELATIVEPOSITION
Definition: matroska.h:161
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:129
static const EbmlSyntax matroska_segments[]
Definition: matroskadec.c:582
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1396
uint8_t * data
Definition: avcodec.h:1433
uint64_t typevalue
Definition: matroskadec.c:232
uint64_t codec_delay
Definition: matroskadec.c:186
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2959
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord)
Definition: vf_neighbor.c:130
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:112
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:221
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
#define MATROSKA_ID_BLOCKADDITIONS
Definition: matroska.h:192
uint32_t tag
Definition: movenc.c:1339
static const EbmlSyntax matroska_index[]
Definition: matroskadec.c:524
int64_t start_time_ns
Definition: matroskadec.c:3160
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define MATROSKA_ID_CODECDECODEALL
Definition: matroska.h:93
#define MATROSKA_ID_ENCODINGENCRYPTION
Definition: matroska.h:142
enum AVCodecID id
Definition: internal.h:49
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define MATROSKA_ID_CUES
Definition: matroska.h:58
#define EBML_MAX_DEPTH
Definition: matroska.h:277
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:761
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:390
static const uint8_t header[24]
Definition: sdr2.c:67
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:3006
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
static int64_t duration
Definition: ffplay.c:326
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:178
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1451
#define MATROSKA_ID_SEGMENTUID
Definition: matroska.h:72
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:542
#define AV_DISPOSITION_CAPTIONS
To specify text track kind (different from subtitles default).
Definition: avformat.h:836
EbmlList sub
Definition: matroskadec.c:227
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, uint64_t pos)
Definition: matroskadec.c:1436
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1479
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3017
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:968
#define MATROSKA_ID_CUEBLOCKNUMBER
Definition: matroska.h:163
#define MATROSKA_ID_TRACKUID
Definition: matroska.h:79
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:147
uint64_t display_height
Definition: matroskadec.c:135
#define U(x)
Definition: vp56_arith.h:37
#define MATROSKA_ID_ENCODINGORDER
Definition: matroska.h:135
#define MATROSKA_ID_VIDEOSTEREOMODE
Definition: matroska.h:122
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:84
#define AVINDEX_KEYFRAME
Definition: avformat.h:803
#define FILENAME
Definition: matroska.h:292
EbmlType type
Definition: matroskadec.c:84
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:102
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1497
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:200
int64_t end_offset
Definition: matroskadec.c:3163
#define EBML_ID_EBMLREADVERSION
Definition: matroska.h:37
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:1850
int profile
Definition: mxfenc.c:1820
static const uint16_t mask[17]
Definition: lzw.c:38
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2911
FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.
static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb, uint64_t *number)
Read a EBML length value.
Definition: matroskadec.c:764
av_default_item_name
#define AV_RB16
Definition: intreadwrite.h:53
AVChapter * chapter
Definition: matroskadec.c:209
#define AVERROR(e)
Definition: error.h:43
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:797
#define MATROSKA_ID_CLUSTER
Definition: matroska.h:62
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:178
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:209
static const EbmlSyntax matroska_track_encoding[]
Definition: matroskadec.c:398
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num)
Definition: matroskadec.c:905
const char * r
Definition: vf_curves.c:107
int64_t convergence_duration
Time difference in AVStream->time_base units from the pts of this packet to the point at which the ou...
Definition: avcodec.h:1477
uint64_t display_width
Definition: matroskadec.c:134
#define MATROSKA_ID_WRITINGAPP
Definition: matroska.h:69
static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size, int64_t pos, uint64_t cluster_time, uint64_t block_duration, int is_keyframe, uint8_t *additional, uint64_t additional_id, int additional_size, int64_t cluster_pos, int64_t discard_padding)
Definition: matroskadec.c:2826
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
EbmlBin additional
Definition: matroskadec.c:324
const char *const ff_matroska_video_stereo_mode[MATROSKA_VIDEO_STEREOMODE_TYPE_NB]
Definition: matroska.c:127
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:199
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:425
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:172
enum AVCodecID id
Definition: matroska.h:273
#define MATROSKA_ID_VIDEOPIXELCROPR
Definition: matroska.h:119
#define MATROSKA_ID_TRACKPLANEUID
Definition: matroska.h:86
GLsizei GLsizei * length
Definition: opengl_enc.c:115
#define MATROSKA_ID_ENCODINGCOMPSETTINGS
Definition: matroska.h:140
#define EBML_ID_EBMLMAXIDLENGTH
Definition: matroska.h:38
#define MATROSKA_ID_CHAPTERFLAGHIDDEN
Definition: matroska.h:226
static const EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c:518
static const EbmlSyntax matroska_chapter_entry[]
Definition: matroskadec.c:483
enum AVCodecID codec_id
Definition: mov_chan.c:433
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
char * av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size)
Encode data to base64 and null-terminate.
Definition: base64.c:138
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:937
uint64_t timecode
Definition: matroskadec.c:254
#define CONFIG_ZLIB
Definition: config.h:483
#define FFMAX(a, b)
Definition: common.h:90
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:57
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1439
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2333
Only parse headers, do not repack.
Definition: avformat.h:787
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:533
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:873
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1142
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:111
int nb_elem
Definition: matroskadec.c:97
#define MATROSKA_ID_TAG
Definition: matroska.h:166
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:463
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:462
char * lang
Definition: matroskadec.c:225
static const EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:559
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:821
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1341
#define MATROSKA_ID_ENCODINGSIGHASHALGO
Definition: matroska.h:147
uint64_t skip_to_timecode
Definition: matroskadec.c:298
Definition: dct-test.c:51
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:2115
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1547
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:160
int bit_rate
the average bitrate
Definition: avcodec.h:1577
int64_t i
Definition: matroskadec.c:88
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1481
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:119
uint64_t start
Definition: matroskadec.c:204
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
char filename[1024]
input or output filename
Definition: avformat.h:1361
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:134
#define AV_BASE64_SIZE(x)
Calculate the output size needed to base64-encode x bytes to a null-terminated string.
Definition: base64.h:61
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:246
static const EbmlSyntax matroska_clusters[]
Definition: matroskadec.c:619
#define FFMIN(a, b)
Definition: common.h:92
#define MATROSKA_ID_TAGTARGETS
Definition: matroska.h:173
float y
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
AVPacket ** packets
Definition: matroskadec.c:290
#define MATROSKA_VIDEO_STEREO_PLANE_COUNT
Definition: matroska.h:279
#define MATROSKA_ID_TAGNAME
Definition: matroska.h:168
#define MATROSKA_ID_TRACKTIMECODESCALE
Definition: matroska.h:107
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
static int ebml_parse_elem(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1050
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:718
static const EbmlSyntax matroska_track_combine_planes[]
Definition: matroskadec.c:418
int width
picture width / height.
Definition: avcodec.h:1691
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:227
uint64_t id_length
Definition: matroskadec.c:110
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num)
Definition: matroskadec.c:1217
#define CLUSTER_KEYFRAME
Definition: matroska.h:295
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:167
uint64_t doctype_version
Definition: matroskadec.c:112
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
#define MATROSKA_ID_TRACKMAXCACHE
Definition: matroska.h:103
#define DURATION
Definition: matroska.h:294
int data_offset
Definition: matroskadec.c:86
#define MATROSKA_ID_CHAPTERPHYSEQUIV
Definition: matroska.h:228
static int matroska_read_close(AVFormatContext *s)
Definition: matroskadec.c:3142
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
EbmlBin codec_priv
Definition: matroskadec.c:175
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
Definition: matroskadec.c:838
static const EbmlSyntax ebml_syntax[]
Definition: matroskadec.c:339
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1231
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:215
#define OFFSET(x)
Definition: matroskadec.c:3514
#define AV_RL32
Definition: intreadwrite.h:146
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
Definition: lzo.c:134
int n
Definition: avisynth_c.h:547
AVDictionary * metadata
Definition: avformat.h:928
static const EbmlSyntax matroska_chapter[]
Definition: matroskadec.c:495
Opaque data information usually sparse.
Definition: avutil.h:197
#define MATROSKA_ID_VIDEOCOLORSPACE
Definition: matroska.h:125
#define MATROSKA_ID_CHAPTERS
Definition: matroska.h:63
static int matroska_probe(AVProbeData *p)
Definition: matroskadec.c:1175
#define EBML_ID_VOID
Definition: matroska.h:45
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1367
uint64_t max_block_additional_id
Definition: matroskadec.c:191
const uint8_t ff_log2_tab[256]
Definition: log2_tab.c:23
#define MATROSKA_ID_AUDIOSAMPLINGFREQ
Definition: matroska.h:128
#define FF_ARRAY_ELEMS(a)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:831
double f
Definition: matroskadec.c:90
#define MATROSKA_ID_TRACKMINCACHE
Definition: matroska.h:102
#define av_log2
Definition: intmath.h:100
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
Definition: matroskadec.c:1587
static int matroska_parse_flac(AVFormatContext *s, MatroskaTrack *track, int *offset)
Definition: matroskadec.c:1598
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:634
static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: matroskadec.c:3062
Stream structure.
Definition: avformat.h:854
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:2499
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define MATROSKA_ID_TRACKPLANETYPE
Definition: matroska.h:87
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2292
static const EbmlSyntax matroska_tags[]
Definition: matroskadec.c:554
EbmlList encodings
Definition: matroskadec.c:185
#define CUES_END
Definition: matroska.h:291
char * codec_id
Definition: matroskadec.c:174
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:809
static const EbmlSyntax matroska_track_operation[]
Definition: matroskadec.c:423
static const EbmlSyntax matroska_cluster_incremental[]
Definition: matroskadec.c:642
int64_t current_cluster_pos
Definition: matroskadec.c:308
#define MATROSKA_ID_VIDEOPIXELCROPB
Definition: matroska.h:116
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
static int matroska_parse_tracks(AVFormatContext *s)
Definition: matroskadec.c:1653
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:837
AVS_Value src
Definition: avisynth_c.h:482
#define MATROSKA_ID_TRACKFLAGFORCED
Definition: matroska.h:100
#define MATROSKA_ID_TAGS
Definition: matroska.h:59
enum AVMediaType codec_type
Definition: avcodec.h:1520
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom.c:268
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
Definition: matroskadec.c:883
enum AVCodecID codec_id
Definition: avcodec.h:1529
#define MATROSKA_ID_TAGDEFAULT
Definition: matroska.h:171
#define BANDWIDTH
Definition: matroska.h:293
#define MATROSKA_ID_SEEKID
Definition: matroska.h:184
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
static const EbmlSyntax matroska_track_encoding_compression[]
Definition: matroskadec.c:382
int sample_rate
samples per second
Definition: avcodec.h:2272
AVIOContext * pb
I/O context.
Definition: avformat.h:1327
static const EbmlSyntax matroska_track[]
Definition: matroskadec.c:428
#define MATROSKA_ID_ENCODINGCOMPALGO
Definition: matroska.h:139
#define MATROSKA_ID_BLOCK
Definition: matroska.h:199
#define MATROSKA_ID_INFO
Definition: matroska.h:56
#define MATROSKA_ID_TAGTARGETS_TRACKUID
Definition: matroska.h:176
static const EbmlSyntax ebml_header[]
Definition: matroskadec.c:328
#define CUE_TIMESTAMPS
Definition: matroska.h:296
#define MATROSKA_ID_TAGLANG
Definition: matroska.h:170
uint64_t pixel_width
Definition: matroskadec.c:136
#define MATROSKA_ID_TRACKCOMBINEPLANES
Definition: matroska.h:84
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1544
static const AVClass webm_dash_class
Definition: matroskadec.c:3520
int64_t start_offset
Definition: matroskadec.c:3162
#define MATROSKA_ID_TRACKFLAGENABLED
Definition: matroska.h:98
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2941
#define MATROSKA_ID_TRACKS
Definition: matroska.h:57
void * buf
Definition: avisynth_c.h:553
#define MATROSKA_ID_TRACKPLANE
Definition: matroska.h:85
Data found in BlockAdditional element of matroska container.
Definition: avcodec.h:1349
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1628
#define MATROSKA_ID_TRACKNAME
Definition: matroska.h:96
uint64_t start
Definition: matroskadec.c:249
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
int nb_index_entries
Definition: avformat.h:1059
#define MATROSKA_ID_SEEKENTRY
Definition: matroska.h:181
Describe the class of an AVClass context structure.
Definition: log.h:67
EbmlList pos
Definition: matroskadec.c:219
uint64_t u
Definition: matroskadec.c:89
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
#define MATROSKA_ID_EDITIONENTRY
Definition: matroska.h:214
int index
Definition: gxfenc.c:89
static const EbmlSyntax matroska_blockadditions[]
Definition: matroskadec.c:593
#define MATROSKA_ID_BLOCKGROUP
Definition: matroska.h:191
#define MATROSKA_ID_VIDEOPIXELHEIGHT
Definition: matroska.h:115
rational number numerator/denominator
Definition: rational.h:43
#define MATROSKA_ID_CUEDURATION
Definition: matroska.h:162
AVStream * stream
Definition: matroskadec.c:188
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, int *buf_size, int type, uint32_t **lace_buf, int *laces)
Definition: matroskadec.c:2313
#define MATROSKA_ID_CUETIME
Definition: matroska.h:155
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:286
#define MATROSKA_ID_ENCODINGSIGALGO
Definition: matroska.h:146
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3047
Recommmends skipping the specified number of samples.
Definition: avcodec.h:1314
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:952
static av_always_inline void flac_parse_block_header(const uint8_t *block_header, int *last, int *type, int *size)
Parse the metadata block parameters from the header.
Definition: flac.h:151
#define MATROSKA_ID_ENCODINGSIGKEYID
Definition: matroska.h:148
#define MATROSKA_ID_TITLE
Definition: matroska.h:68
#define snprintf
Definition: snprintf.h:34
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:470
AVFormatContext * ctx
Definition: matroskadec.c:266
#define MATROSKA_ID_TRACKVIDEO
Definition: matroska.h:81
int64_t discard_padding
Definition: matroskadec.c:325
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int size, int big_endian)
Definition: riffdec.c:86
int size
Definition: matroskadec.c:102
static const EbmlSyntax matroska_attachments[]
Definition: matroskadec.c:472
int error
contains the error code or 0 if no error happened
Definition: avio.h:145
static const EbmlSyntax matroska_clusters_incremental[]
Definition: matroskadec.c:651
This structure contains the data a format has to probe a file.
Definition: avformat.h:460
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, uint32_t id, void *data)
Definition: matroskadec.c:935
int list_elem_size
Definition: matroskadec.c:85
size_t av_strlcat(char *dst, const char *src, size_t size)
Append the string src to the string dst, but to a total length of no more than size - 1 bytes...
Definition: avstring.c:93
static const EbmlSyntax matroska_cluster_incremental_parsing[]
Definition: matroskadec.c:628
#define MATROSKA_ID_VIDEOFRAMERATE
Definition: matroska.h:111
int64_t end_time_ns
Definition: matroskadec.c:3161
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:138
#define MATROSKA_ID_ATTACHMENTS
Definition: matroska.h:61
static const EbmlSyntax matroska_chapter_display[]
Definition: matroskadec.c:477
#define MATROSKA_ID_TRACKOPERATION
Definition: matroska.h:83
int64_t pos
Definition: matroskadec.c:104
static const EbmlSyntax matroska_blockmore[]
Definition: matroskadec.c:587
#define MATROSKA_ID_CHAPTERDISPLAY
Definition: matroska.h:218
static int flags
Definition: cpu.c:47
static const EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:374
MatroskaLevel1Element level1_elems[64]
Definition: matroskadec.c:304
uint8_t level
Definition: svq3.c:150
#define MATROSKA_ID_FILENAME
Definition: matroska.h:208
#define MATROSKA_ID_BLOCKADDITIONAL
Definition: matroska.h:195
const int avpriv_mpeg4audio_sample_rates[16]
Definition: mpeg4audio.c:57
const AVMetadataConv ff_mkv_metadata_conv[]
Definition: matroska.c:121
#define CONFIG_LZO
Definition: config.h:523
#define MATROSKA_ID_CODECID
Definition: matroska.h:88
#define MATROSKA_ID_VIDEOALPHAMODE
Definition: matroska.h:123
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:472
full parsing and repack
Definition: avformat.h:786
int64_t reference
Definition: matroskadec.c:320
void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
Perform 4-bit block reordering for SIPR data.
Definition: rmsipr.c:41
Main libavformat public API header.
uint64_t buf_timecode
Definition: matroskadec.c:156
#define MATROSKA_ID_ENCODINGENCAESSETTINGS
Definition: matroska.h:143
uint64_t num
Definition: matroskadec.c:170
#define MATROSKA_ID_CUETRACK
Definition: matroska.h:159
EbmlType
Definition: matroskadec.c:67
#define MATROSKA_ID_SEEKPOSITION
Definition: matroska.h:185
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
Definition: matroskadec.c:662
#define MATROSKA_ID_CODECDELAY
Definition: matroska.h:94
#define MATROSKA_ID_CHAPTERTIMESTART
Definition: matroska.h:216
double time_scale
Definition: matroskadec.c:177
if(ret< 0)
Definition: vf_mcdeint.c:280
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:72
void * av_realloc(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:145
char * string
Definition: matroskadec.c:224
static const EbmlSyntax matroska_seekhead[]
Definition: matroskadec.c:565
static double c[64]
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:143
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1524
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:917
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
char * doctype
Definition: matroskadec.c:111
static unsigned bit_depth(uint64_t mask)
Definition: af_astats.c:128
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:208
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:49
int den
denominator
Definition: rational.h:45
#define MATROSKA_ID_ENCODINGSIGNATURE
Definition: matroska.h:149
#define MATROSKA_ID_SEGMENT
Definition: matroska.h:53
uint32_t id
Definition: matroskadec.c:83
unsigned bps
Definition: movenc.c:1340
MatroskaTagTarget target
Definition: matroskadec.c:239
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
The optional settings (rendering instructions) that immediately follow the timestamp specifier of a W...
Definition: avcodec.h:1360
#define MKBETAG(a, b, c, d)
Definition: common.h:342
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:636
#define MATROSKA_ID_SEEKHEAD
Definition: matroska.h:60
ASS as defined in Matroska.
Definition: avcodec.h:532
static int matroska_parse_webvtt(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int data_len, uint64_t timecode, uint64_t duration, int64_t pos)
Definition: matroskadec.c:2579
#define EBML_ID_HEADER
Definition: matroska.h:33
void av_codec_set_seek_preroll(AVCodecContext *avctx, int val)
int skip_to_keyframe
Indicates that everything up to the next keyframe should be discarded.
Definition: avformat.h:1097
#define MATROSKA_ID_ENCODINGCOMPRESSION
Definition: matroska.h:138
#define MATROSKA_ID_CLUSTERPREVSIZE
Definition: matroska.h:190
#define av_free(p)
char * value
Definition: dict.h:88
int eof_reached
true if eof reached
Definition: avio.h:139
#define MATROSKA_ID_POINTENTRY
Definition: matroska.h:152
int len
int channels
number of audio channels
Definition: avcodec.h:2273
#define MATROSKA_ID_FILEUID
Definition: matroska.h:211
#define MATROSKA_ID_VIDEOPIXELCROPL
Definition: matroska.h:118
static const EbmlSyntax matroska_index_pos[]
Definition: matroskadec.c:509
void * priv_data
Format private data.
Definition: avformat.h:1313
uint64_t non_simple
Definition: matroskadec.c:321
#define MATROSKA_ID_CHAPTERUID
Definition: matroska.h:225
static const EbmlSyntax matroska_attachment[]
Definition: matroskadec.c:463
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
Definition: matroskadec.c:861
#define MATROSKA_ID_VIDEODISPLAYUNIT
Definition: matroska.h:120
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
Definition: matroskadec.c:777
#define MATROSKA_ID_TRACKMAXBLKADDID
Definition: matroska.h:108
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1432
#define EBML_ID_EBMLMAXSIZELENGTH
Definition: matroska.h:39
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1380
MatroskaTrackEncryption encryption
Definition: matroskadec.c:129
#define MATROSKA_ID_CHAPSTRING
Definition: matroska.h:219
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:553
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:640
#define MATROSKA_ID_TAGSTRING
Definition: matroska.h:169
static const AVOption options[]
Definition: matroskadec.c:3515
const CodecMime ff_mkv_image_mime_tags[]
Definition: matroska.c:102
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:303
static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps, double min_buffer, double *buffer, double *sec_to_download, AVFormatContext *s, int64_t cues_start)
Definition: matroskadec.c:3238
static int ebml_read_float(AVIOContext *pb, int size, double *num)
Definition: matroskadec.c:820
#define MATROSKA_ID_DURATION
Definition: matroska.h:67
uint64_t length
Definition: matroskadec.c:250
static int matroska_aac_profile(char *codec_id)
Definition: matroskadec.c:1566
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:303
int stream_index
Definition: avcodec.h:1435
static const EbmlSyntax matroska_track_encoding_encryption[]
Definition: matroskadec.c:388
#define EBML_ID_DOCTYPEVERSION
Definition: matroska.h:41
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2299
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:896
#define CUES_START
Definition: matroska.h:290
uint8_t bitdepth
Definition: dirac.c:85
#define CONFIG_BZLIB
Definition: config.h:403
#define MKTAG(a, b, c, d)
Definition: common.h:341
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:919
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1073
#define MATROSKA_ID_ATTACHEDFILE
Definition: matroska.h:206
EbmlList blocks
Definition: matroskadec.c:255
This structure stores compressed data.
Definition: avcodec.h:1410
#define MATROSKA_ID_CODECSTATE
Definition: matroska.h:202
uint64_t default_duration
Definition: matroskadec.c:178
int delay
Codec delay.
Definition: avcodec.h:1674
static const EbmlSyntax matroska_tag[]
Definition: matroskadec.c:548
AVInputFormat ff_webm_dash_manifest_demuxer
Definition: matroskadec.c:3540
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
#define MATROSKA_ID_CODECINFOURL
Definition: matroska.h:91
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1426
#define MATROSKA_ID_VIDEOPIXELWIDTH
Definition: matroska.h:114
static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1515
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:946
#define MATROSKA_ID_TRACKAUDIO
Definition: matroska.h:82
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
GLuint buffer
Definition: opengl_enc.c:102
#define av_unused
Definition: attributes.h:118
#define MATROSKA_ID_ENCODINGSCOPE
Definition: matroska.h:136
const CodecTags ff_mkv_codec_tags[]
Definition: matroska.c:29
#define MATROSKA_ID_ENCODINGENCKEYID
Definition: matroska.h:145
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
#define MATROSKA_ID_DISCARDPADDING
Definition: matroska.h:203
const char * name
Definition: opengl_enc.c:103
static int is_ebml_id_valid(uint32_t id)
Definition: matroskadec.c:1002
static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
Definition: matroskadec.c:3319
static const char *const matroska_doctypes[]
Definition: matroskadec.c:660
uint64_t attachuid
Definition: matroskadec.c:235