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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 #include "qtpalette.h"
68 
69 typedef enum {
82 } EbmlType;
83 
84 typedef const struct EbmlSyntax {
85  uint32_t id;
89  union {
90  uint64_t u;
91  double f;
92  const char *s;
93  const struct EbmlSyntax *n;
94  } def;
95 } EbmlSyntax;
96 
97 typedef struct EbmlList {
98  int nb_elem;
99  void *elem;
100 } EbmlList;
101 
102 typedef struct EbmlBin {
103  int size;
105  int64_t pos;
106 } EbmlBin;
107 
108 typedef struct Ebml {
109  uint64_t version;
110  uint64_t max_size;
111  uint64_t id_length;
112  char *doctype;
113  uint64_t doctype_version;
114 } Ebml;
115 
116 typedef struct MatroskaTrackCompression {
117  uint64_t algo;
120 
121 typedef struct MatroskaTrackEncryption {
122  uint64_t algo;
125 
126 typedef struct MatroskaTrackEncoding {
127  uint64_t scope;
128  uint64_t type;
132 
133 typedef struct MatroskaTrackVideo {
134  double frame_rate;
135  uint64_t display_width;
136  uint64_t display_height;
137  uint64_t pixel_width;
138  uint64_t pixel_height;
140  uint64_t stereo_mode;
141  uint64_t alpha_mode;
143 
144 typedef struct MatroskaTrackAudio {
145  double samplerate;
147  uint64_t bitdepth;
148  uint64_t channels;
149 
150  /* real audio header (extracted from extradata) */
156  int pkt_cnt;
157  uint64_t buf_timecode;
160 
161 typedef struct MatroskaTrackPlane {
162  uint64_t uid;
163  uint64_t type;
165 
166 typedef struct MatroskaTrackOperation {
169 
170 typedef struct MatroskaTrack {
171  uint64_t num;
172  uint64_t uid;
173  uint64_t type;
174  char *name;
175  char *codec_id;
177  char *language;
178  double time_scale;
180  uint64_t flag_default;
181  uint64_t flag_forced;
182  uint64_t seek_preroll;
187  uint64_t codec_delay;
188 
190  int64_t end_timecode;
193 } MatroskaTrack;
194 
195 typedef struct MatroskaAttachment {
196  uint64_t uid;
197  char *filename;
198  char *mime;
200 
203 
204 typedef struct MatroskaChapter {
205  uint64_t start;
206  uint64_t end;
207  uint64_t uid;
208  char *title;
209 
212 
213 typedef struct MatroskaIndexPos {
214  uint64_t track;
215  uint64_t pos;
217 
218 typedef struct MatroskaIndex {
219  uint64_t time;
221 } MatroskaIndex;
222 
223 typedef struct MatroskaTag {
224  char *name;
225  char *string;
226  char *lang;
227  uint64_t def;
229 } MatroskaTag;
230 
231 typedef struct MatroskaTagTarget {
232  char *type;
233  uint64_t typevalue;
234  uint64_t trackuid;
235  uint64_t chapteruid;
236  uint64_t attachuid;
238 
239 typedef struct MatroskaTags {
242 } MatroskaTags;
243 
244 typedef struct MatroskaSeekhead {
245  uint64_t id;
246  uint64_t pos;
248 
249 typedef struct MatroskaLevel {
250  uint64_t start;
251  uint64_t length;
252 } MatroskaLevel;
253 
254 typedef struct MatroskaCluster {
255  uint64_t timecode;
258 
259 typedef struct MatroskaLevel1Element {
260  uint64_t id;
261  uint64_t pos;
262  int parsed;
264 
265 typedef struct MatroskaDemuxContext {
266  const AVClass *class;
268 
269  /* EBML stuff */
272  int level_up;
273  uint32_t current_id;
274 
275  uint64_t time_scale;
276  double duration;
277  char *title;
278  char *muxingapp;
286 
287  /* byte position of the segment inside the stream */
288  int64_t segment_start;
289 
290  /* the packet queue */
294 
295  int done;
296 
297  /* What to skip before effectively reading a packet. */
300 
301  /* File has a CUES element, but we defer parsing until it is needed. */
303 
304  /* Level1 elements and whether they were read yet */
307 
311 
312  /* File has SSA subtitles which prevent incremental cluster parsing. */
314 
315  /* WebM DASH Manifest live flag/ */
316  int is_live;
317 
321 
322 typedef struct MatroskaBlock {
323  uint64_t duration;
324  int64_t reference;
325  uint64_t non_simple;
327  uint64_t additional_id;
330 } MatroskaBlock;
331 
332 static const EbmlSyntax ebml_header[] = {
333  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
334  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
335  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
336  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
337  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
340  { 0 }
341 };
342 
343 static const EbmlSyntax ebml_syntax[] = {
344  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
345  { 0 }
346 };
347 
348 static const EbmlSyntax matroska_info[] = {
349  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
351  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
353  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
354  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
356  { 0 }
357 };
358 
360  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
361  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
362  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
363  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
364  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
365  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
366  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
375  { 0 }
376 };
377 
379  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
380  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
381  { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
382  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
383  { 0 }
384 };
385 
389  { 0 }
390 };
391 
400  { 0 }
401 };
403  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
404  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
405  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
406  { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
408  { 0 }
409 };
410 
412  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
413  { 0 }
414 };
415 
419  { 0 }
420 };
421 
423  { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
424  { 0 }
425 };
426 
428  { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
429  { 0 }
430 };
431 
432 static const EbmlSyntax matroska_track[] = {
433  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
435  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
438  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
439  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
440  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
441  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
442  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
443  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
444  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
445  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
446  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
447  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
448  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
449  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
450  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
459  { 0 }
460 };
461 
462 static const EbmlSyntax matroska_tracks[] = {
463  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
464  { 0 }
465 };
466 
467 static const EbmlSyntax matroska_attachment[] = {
469  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
470  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
471  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
473  { 0 }
474 };
475 
477  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
478  { 0 }
479 };
480 
482  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
485  { 0 }
486 };
487 
492  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
497  { 0 }
498 };
499 
500 static const EbmlSyntax matroska_chapter[] = {
501  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
506  { 0 }
507 };
508 
509 static const EbmlSyntax matroska_chapters[] = {
510  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
511  { 0 }
512 };
513 
514 static const EbmlSyntax matroska_index_pos[] = {
515  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
520  { 0 }
521 };
522 
524  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
525  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
526  { 0 }
527 };
528 
529 static const EbmlSyntax matroska_index[] = {
530  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
531  { 0 }
532 };
533 
534 static const EbmlSyntax matroska_simpletag[] = {
535  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
536  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
537  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
538  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
539  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
540  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
541  { 0 }
542 };
543 
544 static const EbmlSyntax matroska_tagtargets[] = {
546  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
547  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
548  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
549  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
550  { 0 }
551 };
552 
553 static const EbmlSyntax matroska_tag[] = {
554  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
555  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
556  { 0 }
557 };
558 
559 static const EbmlSyntax matroska_tags[] = {
560  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
561  { 0 }
562 };
563 
565  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
566  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
567  { 0 }
568 };
569 
570 static const EbmlSyntax matroska_seekhead[] = {
571  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
572  { 0 }
573 };
574 
575 static const EbmlSyntax matroska_segment[] = {
576  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
577  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
578  { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
579  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
580  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
581  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
582  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
584  { 0 }
585 };
586 
587 static const EbmlSyntax matroska_segments[] = {
588  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
589  { 0 }
590 };
591 
592 static const EbmlSyntax matroska_blockmore[] = {
593  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
594  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
595  { 0 }
596 };
597 
599  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
600  { 0 }
601 };
602 
603 static const EbmlSyntax matroska_blockgroup[] = {
604  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
605  { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
606  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
608  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
609  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
611  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
612  { 0 }
613 };
614 
615 static const EbmlSyntax matroska_cluster[] = {
616  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
617  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
618  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
621  { 0 }
622 };
623 
624 static const EbmlSyntax matroska_clusters[] = {
625  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
630  { 0 }
631 };
632 
634  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
635  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
636  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
644  { 0 }
645 };
646 
648  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
653  { 0 }
654 };
655 
657  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
662  { 0 }
663 };
664 
665 static const char *const matroska_doctypes[] = { "matroska", "webm" };
666 
667 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
668 {
669  AVIOContext *pb = matroska->ctx->pb;
670  uint32_t id;
671  matroska->current_id = 0;
672  matroska->num_levels = 0;
673 
674  /* seek to next position to resync from */
675  if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
676  goto eof;
677 
678  id = avio_rb32(pb);
679 
680  // try to find a toplevel element
681  while (!avio_feof(pb)) {
682  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
683  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
685  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
686  matroska->current_id = id;
687  return 0;
688  }
689  id = (id << 8) | avio_r8(pb);
690  }
691 
692 eof:
693  matroska->done = 1;
694  return AVERROR_EOF;
695 }
696 
697 /*
698  * Return: Whether we reached the end of a level in the hierarchy or not.
699  */
701 {
702  AVIOContext *pb = matroska->ctx->pb;
703  int64_t pos = avio_tell(pb);
704 
705  if (matroska->num_levels > 0) {
706  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
707  if (pos - level->start >= level->length || matroska->current_id) {
708  matroska->num_levels--;
709  return 1;
710  }
711  }
712  return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
713 }
714 
715 /*
716  * Read: an "EBML number", which is defined as a variable-length
717  * array of bytes. The first byte indicates the length by giving a
718  * number of 0-bits followed by a one. The position of the first
719  * "one" bit inside the first byte indicates the length of this
720  * number.
721  * Returns: number of bytes read, < 0 on error
722  */
724  int max_size, uint64_t *number)
725 {
726  int read = 1, n = 1;
727  uint64_t total = 0;
728 
729  /* The first byte tells us the length in bytes - avio_r8() can normally
730  * return 0, but since that's not a valid first ebmlID byte, we can
731  * use it safely here to catch EOS. */
732  if (!(total = avio_r8(pb))) {
733  /* we might encounter EOS here */
734  if (!avio_feof(pb)) {
735  int64_t pos = avio_tell(pb);
736  av_log(matroska->ctx, AV_LOG_ERROR,
737  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
738  pos, pos);
739  return pb->error ? pb->error : AVERROR(EIO);
740  }
741  return AVERROR_EOF;
742  }
743 
744  /* get the length of the EBML number */
745  read = 8 - ff_log2_tab[total];
746  if (read > max_size) {
747  int64_t pos = avio_tell(pb) - 1;
748  av_log(matroska->ctx, AV_LOG_ERROR,
749  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
750  (uint8_t) total, pos, pos);
751  return AVERROR_INVALIDDATA;
752  }
753 
754  /* read out length */
755  total ^= 1 << ff_log2_tab[total];
756  while (n++ < read)
757  total = (total << 8) | avio_r8(pb);
758 
759  *number = total;
760 
761  return read;
762 }
763 
764 /**
765  * Read a EBML length value.
766  * This needs special handling for the "unknown length" case which has multiple
767  * encodings.
768  */
770  uint64_t *number)
771 {
772  int res = ebml_read_num(matroska, pb, 8, number);
773  if (res > 0 && *number + 1 == 1ULL << (7 * res))
774  *number = 0xffffffffffffffULL;
775  return res;
776 }
777 
778 /*
779  * Read the next element as an unsigned int.
780  * 0 is success, < 0 is failure.
781  */
782 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
783 {
784  int n = 0;
785 
786  if (size > 8)
787  return AVERROR_INVALIDDATA;
788 
789  /* big-endian ordering; build up number */
790  *num = 0;
791  while (n++ < size)
792  *num = (*num << 8) | avio_r8(pb);
793 
794  return 0;
795 }
796 
797 /*
798  * Read the next element as a signed int.
799  * 0 is success, < 0 is failure.
800  */
801 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
802 {
803  int n = 1;
804 
805  if (size > 8)
806  return AVERROR_INVALIDDATA;
807 
808  if (size == 0) {
809  *num = 0;
810  } else {
811  *num = sign_extend(avio_r8(pb), 8);
812 
813  /* big-endian ordering; build up number */
814  while (n++ < size)
815  *num = ((uint64_t)*num << 8) | avio_r8(pb);
816  }
817 
818  return 0;
819 }
820 
821 /*
822  * Read the next element as a float.
823  * 0 is success, < 0 is failure.
824  */
825 static int ebml_read_float(AVIOContext *pb, int size, double *num)
826 {
827  if (size == 0)
828  *num = 0;
829  else if (size == 4)
830  *num = av_int2float(avio_rb32(pb));
831  else if (size == 8)
832  *num = av_int2double(avio_rb64(pb));
833  else
834  return AVERROR_INVALIDDATA;
835 
836  return 0;
837 }
838 
839 /*
840  * Read the next element as an ASCII string.
841  * 0 is success, < 0 is failure.
842  */
843 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
844 {
845  char *res;
846 
847  /* EBML strings are usually not 0-terminated, so we allocate one
848  * byte more, read the string and NULL-terminate it ourselves. */
849  if (!(res = av_malloc(size + 1)))
850  return AVERROR(ENOMEM);
851  if (avio_read(pb, (uint8_t *) res, size) != size) {
852  av_free(res);
853  return AVERROR(EIO);
854  }
855  (res)[size] = '\0';
856  av_free(*str);
857  *str = res;
858 
859  return 0;
860 }
861 
862 /*
863  * Read the next element as binary data.
864  * 0 is success, < 0 is failure.
865  */
866 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
867 {
868  av_fast_padded_malloc(&bin->data, &bin->size, length);
869  if (!bin->data)
870  return AVERROR(ENOMEM);
871 
872  bin->size = length;
873  bin->pos = avio_tell(pb);
874  if (avio_read(pb, bin->data, length) != length) {
875  av_freep(&bin->data);
876  bin->size = 0;
877  return AVERROR(EIO);
878  }
879 
880  return 0;
881 }
882 
883 /*
884  * Read the next element, but only the header. The contents
885  * are supposed to be sub-elements which can be read separately.
886  * 0 is success, < 0 is failure.
887  */
888 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
889 {
890  AVIOContext *pb = matroska->ctx->pb;
892 
893  if (matroska->num_levels >= EBML_MAX_DEPTH) {
894  av_log(matroska->ctx, AV_LOG_ERROR,
895  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
896  return AVERROR(ENOSYS);
897  }
898 
899  level = &matroska->levels[matroska->num_levels++];
900  level->start = avio_tell(pb);
901  level->length = length;
902 
903  return 0;
904 }
905 
906 /*
907  * Read signed/unsigned "EBML" numbers.
908  * Return: number of bytes processed, < 0 on error
909  */
911  uint8_t *data, uint32_t size, uint64_t *num)
912 {
913  AVIOContext pb;
914  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
915  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
916 }
917 
918 /*
919  * Same as above, but signed.
920  */
922  uint8_t *data, uint32_t size, int64_t *num)
923 {
924  uint64_t unum;
925  int res;
926 
927  /* read as unsigned number first */
928  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
929  return res;
930 
931  /* make signed (weird way) */
932  *num = unum - ((1LL << (7 * res - 1)) - 1);
933 
934  return res;
935 }
936 
937 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
938  EbmlSyntax *syntax, void *data);
939 
940 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
941  uint32_t id, void *data)
942 {
943  int i;
944  for (i = 0; syntax[i].id; i++)
945  if (id == syntax[i].id)
946  break;
947  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
948  matroska->num_levels > 0 &&
949  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
950  return 0; // we reached the end of an unknown size cluster
951  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
952  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
953  }
954  return ebml_parse_elem(matroska, &syntax[i], data);
955 }
956 
957 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
958  void *data)
959 {
960  if (!matroska->current_id) {
961  uint64_t id;
962  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
963  if (res < 0) {
964  // in live mode, finish parsing if EOF is reached.
965  return (matroska->is_live && matroska->ctx->pb->eof_reached &&
966  res == AVERROR_EOF) ? 1 : res;
967  }
968  matroska->current_id = id | 1 << 7 * res;
969  }
970  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
971 }
972 
973 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
974  void *data)
975 {
976  int i, res = 0;
977 
978  for (i = 0; syntax[i].id; i++)
979  switch (syntax[i].type) {
980  case EBML_UINT:
981  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
982  break;
983  case EBML_FLOAT:
984  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
985  break;
986  case EBML_STR:
987  case EBML_UTF8:
988  // the default may be NULL
989  if (syntax[i].def.s) {
990  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
991  *dst = av_strdup(syntax[i].def.s);
992  if (!*dst)
993  return AVERROR(ENOMEM);
994  }
995  break;
996  }
997 
998  while (!res && !ebml_level_end(matroska))
999  res = ebml_parse(matroska, syntax, data);
1000 
1001  return res;
1002 }
1003 
1004 static int is_ebml_id_valid(uint32_t id)
1005 {
1006  // Due to endian nonsense in Matroska, the highest byte with any bits set
1007  // will contain the leading length bit. This bit in turn identifies the
1008  // total byte length of the element by its position within the byte.
1009  unsigned int bits = av_log2(id);
1010  return id && (bits + 7) / 8 == (8 - bits % 8);
1011 }
1012 
1013 /*
1014  * Allocate and return the entry for the level1 element with the given ID. If
1015  * an entry already exists, return the existing entry.
1016  */
1018  uint32_t id)
1019 {
1020  int i;
1021  MatroskaLevel1Element *elem;
1022 
1023  if (!is_ebml_id_valid(id))
1024  return NULL;
1025 
1026  // Some files link to all clusters; useless.
1027  if (id == MATROSKA_ID_CLUSTER)
1028  return NULL;
1029 
1030  // There can be multiple seekheads.
1031  if (id != MATROSKA_ID_SEEKHEAD) {
1032  for (i = 0; i < matroska->num_level1_elems; i++) {
1033  if (matroska->level1_elems[i].id == id)
1034  return &matroska->level1_elems[i];
1035  }
1036  }
1037 
1038  // Only a completely broken file would have more elements.
1039  // It also provides a low-effort way to escape from circular seekheads
1040  // (every iteration will add a level1 entry).
1041  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1042  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1043  return NULL;
1044  }
1045 
1046  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1047  *elem = (MatroskaLevel1Element){.id = id};
1048 
1049  return elem;
1050 }
1051 
1053  EbmlSyntax *syntax, void *data)
1054 {
1055  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1056  [EBML_UINT] = 8,
1057  [EBML_FLOAT] = 8,
1058  // max. 16 MB for strings
1059  [EBML_STR] = 0x1000000,
1060  [EBML_UTF8] = 0x1000000,
1061  // max. 256 MB for binary data
1062  [EBML_BIN] = 0x10000000,
1063  // no limits for anything else
1064  };
1065  AVIOContext *pb = matroska->ctx->pb;
1066  uint32_t id = syntax->id;
1067  uint64_t length;
1068  int res;
1069  void *newelem;
1070  MatroskaLevel1Element *level1_elem;
1071 
1072  data = (char *) data + syntax->data_offset;
1073  if (syntax->list_elem_size) {
1074  EbmlList *list = data;
1075  newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1076  if (!newelem)
1077  return AVERROR(ENOMEM);
1078  list->elem = newelem;
1079  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1080  memset(data, 0, syntax->list_elem_size);
1081  list->nb_elem++;
1082  }
1083 
1084  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1085  matroska->current_id = 0;
1086  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1087  return res;
1088  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1089  av_log(matroska->ctx, AV_LOG_ERROR,
1090  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1091  length, max_lengths[syntax->type], syntax->type);
1092  return AVERROR_INVALIDDATA;
1093  }
1094  }
1095 
1096  switch (syntax->type) {
1097  case EBML_UINT:
1098  res = ebml_read_uint(pb, length, data);
1099  break;
1100  case EBML_SINT:
1101  res = ebml_read_sint(pb, length, data);
1102  break;
1103  case EBML_FLOAT:
1104  res = ebml_read_float(pb, length, data);
1105  break;
1106  case EBML_STR:
1107  case EBML_UTF8:
1108  res = ebml_read_ascii(pb, length, data);
1109  break;
1110  case EBML_BIN:
1111  res = ebml_read_binary(pb, length, data);
1112  break;
1113  case EBML_LEVEL1:
1114  case EBML_NEST:
1115  if ((res = ebml_read_master(matroska, length)) < 0)
1116  return res;
1117  if (id == MATROSKA_ID_SEGMENT)
1118  matroska->segment_start = avio_tell(matroska->ctx->pb);
1119  if (id == MATROSKA_ID_CUES)
1120  matroska->cues_parsing_deferred = 0;
1121  if (syntax->type == EBML_LEVEL1 &&
1122  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1123  if (level1_elem->parsed)
1124  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1125  level1_elem->parsed = 1;
1126  }
1127  return ebml_parse_nest(matroska, syntax->def.n, data);
1128  case EBML_PASS:
1129  return ebml_parse_id(matroska, syntax->def.n, id, data);
1130  case EBML_STOP:
1131  return 1;
1132  default:
1133  if (ffio_limit(pb, length) != length)
1134  return AVERROR(EIO);
1135  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1136  }
1137  if (res == AVERROR_INVALIDDATA)
1138  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1139  else if (res == AVERROR(EIO))
1140  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1141  return res;
1142 }
1143 
1144 static void ebml_free(EbmlSyntax *syntax, void *data)
1145 {
1146  int i, j;
1147  for (i = 0; syntax[i].id; i++) {
1148  void *data_off = (char *) data + syntax[i].data_offset;
1149  switch (syntax[i].type) {
1150  case EBML_STR:
1151  case EBML_UTF8:
1152  av_freep(data_off);
1153  break;
1154  case EBML_BIN:
1155  av_freep(&((EbmlBin *) data_off)->data);
1156  break;
1157  case EBML_LEVEL1:
1158  case EBML_NEST:
1159  if (syntax[i].list_elem_size) {
1160  EbmlList *list = data_off;
1161  char *ptr = list->elem;
1162  for (j = 0; j < list->nb_elem;
1163  j++, ptr += syntax[i].list_elem_size)
1164  ebml_free(syntax[i].def.n, ptr);
1165  av_freep(&list->elem);
1166  } else
1167  ebml_free(syntax[i].def.n, data_off);
1168  default:
1169  break;
1170  }
1171  }
1172 }
1173 
1174 /*
1175  * Autodetecting...
1176  */
1178 {
1179  uint64_t total = 0;
1180  int len_mask = 0x80, size = 1, n = 1, i;
1181 
1182  /* EBML header? */
1183  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1184  return 0;
1185 
1186  /* length of header */
1187  total = p->buf[4];
1188  while (size <= 8 && !(total & len_mask)) {
1189  size++;
1190  len_mask >>= 1;
1191  }
1192  if (size > 8)
1193  return 0;
1194  total &= (len_mask - 1);
1195  while (n < size)
1196  total = (total << 8) | p->buf[4 + n++];
1197 
1198  /* Does the probe data contain the whole header? */
1199  if (p->buf_size < 4 + size + total)
1200  return 0;
1201 
1202  /* The header should contain a known document type. For now,
1203  * we don't parse the whole header but simply check for the
1204  * availability of that array of characters inside the header.
1205  * Not fully fool-proof, but good enough. */
1206  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1207  size_t probelen = strlen(matroska_doctypes[i]);
1208  if (total < probelen)
1209  continue;
1210  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1211  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1212  return AVPROBE_SCORE_MAX;
1213  }
1214 
1215  // probably valid EBML header but no recognized doctype
1216  return AVPROBE_SCORE_EXTENSION;
1217 }
1218 
1220  int num)
1221 {
1222  MatroskaTrack *tracks = matroska->tracks.elem;
1223  int i;
1224 
1225  for (i = 0; i < matroska->tracks.nb_elem; i++)
1226  if (tracks[i].num == num)
1227  return &tracks[i];
1228 
1229  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1230  return NULL;
1231 }
1232 
1233 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1234  MatroskaTrack *track)
1235 {
1236  MatroskaTrackEncoding *encodings = track->encodings.elem;
1237  uint8_t *data = *buf;
1238  int isize = *buf_size;
1239  uint8_t *pkt_data = NULL;
1240  uint8_t av_unused *newpktdata;
1241  int pkt_size = isize;
1242  int result = 0;
1243  int olen;
1244 
1245  if (pkt_size >= 10000000U)
1246  return AVERROR_INVALIDDATA;
1247 
1248  switch (encodings[0].compression.algo) {
1250  {
1251  int header_size = encodings[0].compression.settings.size;
1252  uint8_t *header = encodings[0].compression.settings.data;
1253 
1254  if (header_size && !header) {
1255  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1256  return -1;
1257  }
1258 
1259  if (!header_size)
1260  return 0;
1261 
1262  pkt_size = isize + header_size;
1263  pkt_data = av_malloc(pkt_size);
1264  if (!pkt_data)
1265  return AVERROR(ENOMEM);
1266 
1267  memcpy(pkt_data, header, header_size);
1268  memcpy(pkt_data + header_size, data, isize);
1269  break;
1270  }
1271 #if CONFIG_LZO
1273  do {
1274  olen = pkt_size *= 3;
1275  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1276  if (!newpktdata) {
1277  result = AVERROR(ENOMEM);
1278  goto failed;
1279  }
1280  pkt_data = newpktdata;
1281  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1282  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1283  if (result) {
1284  result = AVERROR_INVALIDDATA;
1285  goto failed;
1286  }
1287  pkt_size -= olen;
1288  break;
1289 #endif
1290 #if CONFIG_ZLIB
1292  {
1293  z_stream zstream = { 0 };
1294  if (inflateInit(&zstream) != Z_OK)
1295  return -1;
1296  zstream.next_in = data;
1297  zstream.avail_in = isize;
1298  do {
1299  pkt_size *= 3;
1300  newpktdata = av_realloc(pkt_data, pkt_size);
1301  if (!newpktdata) {
1302  inflateEnd(&zstream);
1303  result = AVERROR(ENOMEM);
1304  goto failed;
1305  }
1306  pkt_data = newpktdata;
1307  zstream.avail_out = pkt_size - zstream.total_out;
1308  zstream.next_out = pkt_data + zstream.total_out;
1309  result = inflate(&zstream, Z_NO_FLUSH);
1310  } while (result == Z_OK && pkt_size < 10000000);
1311  pkt_size = zstream.total_out;
1312  inflateEnd(&zstream);
1313  if (result != Z_STREAM_END) {
1314  if (result == Z_MEM_ERROR)
1315  result = AVERROR(ENOMEM);
1316  else
1317  result = AVERROR_INVALIDDATA;
1318  goto failed;
1319  }
1320  break;
1321  }
1322 #endif
1323 #if CONFIG_BZLIB
1325  {
1326  bz_stream bzstream = { 0 };
1327  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1328  return -1;
1329  bzstream.next_in = data;
1330  bzstream.avail_in = isize;
1331  do {
1332  pkt_size *= 3;
1333  newpktdata = av_realloc(pkt_data, pkt_size);
1334  if (!newpktdata) {
1335  BZ2_bzDecompressEnd(&bzstream);
1336  result = AVERROR(ENOMEM);
1337  goto failed;
1338  }
1339  pkt_data = newpktdata;
1340  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1341  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1342  result = BZ2_bzDecompress(&bzstream);
1343  } while (result == BZ_OK && pkt_size < 10000000);
1344  pkt_size = bzstream.total_out_lo32;
1345  BZ2_bzDecompressEnd(&bzstream);
1346  if (result != BZ_STREAM_END) {
1347  if (result == BZ_MEM_ERROR)
1348  result = AVERROR(ENOMEM);
1349  else
1350  result = AVERROR_INVALIDDATA;
1351  goto failed;
1352  }
1353  break;
1354  }
1355 #endif
1356  default:
1357  return AVERROR_INVALIDDATA;
1358  }
1359 
1360  *buf = pkt_data;
1361  *buf_size = pkt_size;
1362  return 0;
1363 
1364 failed:
1365  av_free(pkt_data);
1366  return result;
1367 }
1368 
1370  AVDictionary **metadata, char *prefix)
1371 {
1372  MatroskaTag *tags = list->elem;
1373  char key[1024];
1374  int i;
1375 
1376  for (i = 0; i < list->nb_elem; i++) {
1377  const char *lang = tags[i].lang &&
1378  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1379 
1380  if (!tags[i].name) {
1381  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1382  continue;
1383  }
1384  if (prefix)
1385  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1386  else
1387  av_strlcpy(key, tags[i].name, sizeof(key));
1388  if (tags[i].def || !lang) {
1389  av_dict_set(metadata, key, tags[i].string, 0);
1390  if (tags[i].sub.nb_elem)
1391  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1392  }
1393  if (lang) {
1394  av_strlcat(key, "-", sizeof(key));
1395  av_strlcat(key, lang, sizeof(key));
1396  av_dict_set(metadata, key, tags[i].string, 0);
1397  if (tags[i].sub.nb_elem)
1398  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1399  }
1400  }
1402 }
1403 
1405 {
1406  MatroskaDemuxContext *matroska = s->priv_data;
1407  MatroskaTags *tags = matroska->tags.elem;
1408  int i, j;
1409 
1410  for (i = 0; i < matroska->tags.nb_elem; i++) {
1411  if (tags[i].target.attachuid) {
1412  MatroskaAttachment *attachment = matroska->attachments.elem;
1413  int found = 0;
1414  for (j = 0; j < matroska->attachments.nb_elem; j++) {
1415  if (attachment[j].uid == tags[i].target.attachuid &&
1416  attachment[j].stream) {
1417  matroska_convert_tag(s, &tags[i].tag,
1418  &attachment[j].stream->metadata, NULL);
1419  found = 1;
1420  }
1421  }
1422  if (!found) {
1424  "The tags at index %d refer to a "
1425  "non-existent attachment %"PRId64".\n",
1426  i, tags[i].target.attachuid);
1427  }
1428  } else if (tags[i].target.chapteruid) {
1429  MatroskaChapter *chapter = matroska->chapters.elem;
1430  int found = 0;
1431  for (j = 0; j < matroska->chapters.nb_elem; j++) {
1432  if (chapter[j].uid == tags[i].target.chapteruid &&
1433  chapter[j].chapter) {
1434  matroska_convert_tag(s, &tags[i].tag,
1435  &chapter[j].chapter->metadata, NULL);
1436  found = 1;
1437  }
1438  }
1439  if (!found) {
1441  "The tags at index %d refer to a non-existent chapter "
1442  "%"PRId64".\n",
1443  i, tags[i].target.chapteruid);
1444  }
1445  } else if (tags[i].target.trackuid) {
1446  MatroskaTrack *track = matroska->tracks.elem;
1447  int found = 0;
1448  for (j = 0; j < matroska->tracks.nb_elem; j++) {
1449  if (track[j].uid == tags[i].target.trackuid &&
1450  track[j].stream) {
1451  matroska_convert_tag(s, &tags[i].tag,
1452  &track[j].stream->metadata, NULL);
1453  found = 1;
1454  }
1455  }
1456  if (!found) {
1458  "The tags at index %d refer to a non-existent track "
1459  "%"PRId64".\n",
1460  i, tags[i].target.trackuid);
1461  }
1462  } else {
1463  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1464  tags[i].target.type);
1465  }
1466  }
1467 }
1468 
1470  uint64_t pos)
1471 {
1472  uint32_t level_up = matroska->level_up;
1473  uint32_t saved_id = matroska->current_id;
1474  int64_t before_pos = avio_tell(matroska->ctx->pb);
1476  int64_t offset;
1477  int ret = 0;
1478 
1479  /* seek */
1480  offset = pos + matroska->segment_start;
1481  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1482  /* We don't want to lose our seekhead level, so we add
1483  * a dummy. This is a crude hack. */
1484  if (matroska->num_levels == EBML_MAX_DEPTH) {
1485  av_log(matroska->ctx, AV_LOG_INFO,
1486  "Max EBML element depth (%d) reached, "
1487  "cannot parse further.\n", EBML_MAX_DEPTH);
1488  ret = AVERROR_INVALIDDATA;
1489  } else {
1490  level.start = 0;
1491  level.length = (uint64_t) -1;
1492  matroska->levels[matroska->num_levels] = level;
1493  matroska->num_levels++;
1494  matroska->current_id = 0;
1495 
1496  ret = ebml_parse(matroska, matroska_segment, matroska);
1497 
1498  /* remove dummy level */
1499  while (matroska->num_levels) {
1500  uint64_t length = matroska->levels[--matroska->num_levels].length;
1501  if (length == (uint64_t) -1)
1502  break;
1503  }
1504  }
1505  }
1506  /* seek back */
1507  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1508  matroska->level_up = level_up;
1509  matroska->current_id = saved_id;
1510 
1511  return ret;
1512 }
1513 
1515 {
1516  EbmlList *seekhead_list = &matroska->seekhead;
1517  int i;
1518 
1519  // we should not do any seeking in the streaming case
1520  if (!matroska->ctx->pb->seekable)
1521  return;
1522 
1523  for (i = 0; i < seekhead_list->nb_elem; i++) {
1524  MatroskaSeekhead *seekheads = seekhead_list->elem;
1525  uint32_t id = seekheads[i].id;
1526  uint64_t pos = seekheads[i].pos;
1527 
1528  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1529  if (!elem || elem->parsed)
1530  continue;
1531 
1532  elem->pos = pos;
1533 
1534  // defer cues parsing until we actually need cue data.
1535  if (id == MATROSKA_ID_CUES)
1536  continue;
1537 
1538  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1539  // mark index as broken
1540  matroska->cues_parsing_deferred = -1;
1541  break;
1542  }
1543 
1544  elem->parsed = 1;
1545  }
1546 }
1547 
1549 {
1550  EbmlList *index_list;
1552  uint64_t index_scale = 1;
1553  int i, j;
1554 
1555  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1556  return;
1557 
1558  index_list = &matroska->index;
1559  index = index_list->elem;
1560  if (index_list->nb_elem < 2)
1561  return;
1562  if (index[1].time > 1E14 / matroska->time_scale) {
1563  av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1564  return;
1565  }
1566  for (i = 0; i < index_list->nb_elem; i++) {
1567  EbmlList *pos_list = &index[i].pos;
1568  MatroskaIndexPos *pos = pos_list->elem;
1569  for (j = 0; j < pos_list->nb_elem; j++) {
1570  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1571  pos[j].track);
1572  if (track && track->stream)
1573  av_add_index_entry(track->stream,
1574  pos[j].pos + matroska->segment_start,
1575  index[i].time / index_scale, 0, 0,
1577  }
1578  }
1579 }
1580 
1582  int i;
1583 
1584  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1585  return;
1586 
1587  for (i = 0; i < matroska->num_level1_elems; i++) {
1588  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1589  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1590  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1591  matroska->cues_parsing_deferred = -1;
1592  elem->parsed = 1;
1593  break;
1594  }
1595  }
1596 
1597  matroska_add_index_entries(matroska);
1598 }
1599 
1601 {
1602  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1603  int profile;
1604 
1605  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1606  if (strstr(codec_id, aac_profiles[profile]))
1607  break;
1608  return profile + 1;
1609 }
1610 
1611 static int matroska_aac_sri(int samplerate)
1612 {
1613  int sri;
1614 
1615  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1616  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1617  break;
1618  return sri;
1619 }
1620 
1621 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1622 {
1623  char buffer[32];
1624  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1625  time_t creation_time = date_utc / 1000000000 + 978307200;
1626  struct tm tmpbuf, *ptm = gmtime_r(&creation_time, &tmpbuf);
1627  if (!ptm) return;
1628  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1629  av_dict_set(metadata, "creation_time", buffer, 0);
1630 }
1631 
1633  MatroskaTrack *track,
1634  int *offset)
1635 {
1636  AVStream *st = track->stream;
1637  uint8_t *p = track->codec_priv.data;
1638  int size = track->codec_priv.size;
1639 
1640  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1641  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1642  track->codec_priv.size = 0;
1643  return 0;
1644  }
1645  *offset = 8;
1646  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1647 
1648  p += track->codec_priv.size;
1649  size -= track->codec_priv.size;
1650 
1651  /* parse the remaining metadata blocks if present */
1652  while (size >= 4) {
1653  int block_last, block_type, block_size;
1654 
1655  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1656 
1657  p += 4;
1658  size -= 4;
1659  if (block_size > size)
1660  return 0;
1661 
1662  /* check for the channel mask */
1663  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1664  AVDictionary *dict = NULL;
1665  AVDictionaryEntry *chmask;
1666 
1667  ff_vorbis_comment(s, &dict, p, block_size, 0);
1668  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1669  if (chmask) {
1670  uint64_t mask = strtol(chmask->value, NULL, 0);
1671  if (!mask || mask & ~0x3ffffULL) {
1673  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1674  } else
1675  st->codec->channel_layout = mask;
1676  }
1677  av_dict_free(&dict);
1678  }
1679 
1680  p += block_size;
1681  size -= block_size;
1682  }
1683 
1684  return 0;
1685 }
1686 
1687 static void mkv_stereo_mode_display_mul(int stereo_mode, int *h_width, int *h_height)
1688 {
1689  switch (stereo_mode) {
1695  break;
1700  *h_width = 2;
1701  break;
1706  *h_height = 2;
1707  break;
1708  }
1709 }
1710 
1711 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
1712 {
1713  const AVCodecTag *codec_tags;
1714 
1715  codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
1717 
1718  /* Normalize noncompliant private data that starts with the fourcc
1719  * by expanding/shifting the data by 4 bytes and storing the data
1720  * size at the start. */
1721  if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
1722  uint8_t *p = av_realloc(track->codec_priv.data,
1723  track->codec_priv.size + 4);
1724  if (!p)
1725  return AVERROR(ENOMEM);
1726  memmove(p + 4, p, track->codec_priv.size);
1727  track->codec_priv.data = p;
1728  track->codec_priv.size += 4;
1729  AV_WB32(track->codec_priv.data, track->codec_priv.size);
1730  }
1731 
1732  *fourcc = AV_RL32(track->codec_priv.data + 4);
1733  *codec_id = ff_codec_get_id(codec_tags, *fourcc);
1734 
1735  return 0;
1736 }
1737 
1739 {
1740  MatroskaDemuxContext *matroska = s->priv_data;
1741  MatroskaTrack *tracks = matroska->tracks.elem;
1742  AVStream *st;
1743  int i, j, ret;
1744  int k;
1745 
1746  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1747  MatroskaTrack *track = &tracks[i];
1749  EbmlList *encodings_list = &track->encodings;
1750  MatroskaTrackEncoding *encodings = encodings_list->elem;
1751  uint8_t *extradata = NULL;
1752  int extradata_size = 0;
1753  int extradata_offset = 0;
1754  uint32_t fourcc = 0;
1755  AVIOContext b;
1756  char* key_id_base64 = NULL;
1757  int bit_depth = -1;
1758 
1759  /* Apply some sanity checks. */
1760  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1761  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1762  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1763  track->type != MATROSKA_TRACK_TYPE_METADATA) {
1764  av_log(matroska->ctx, AV_LOG_INFO,
1765  "Unknown or unsupported track type %"PRIu64"\n",
1766  track->type);
1767  continue;
1768  }
1769  if (!track->codec_id)
1770  continue;
1771 
1772  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
1773  isnan(track->audio.samplerate)) {
1774  av_log(matroska->ctx, AV_LOG_WARNING,
1775  "Invalid sample rate %f, defaulting to 8000 instead.\n",
1776  track->audio.samplerate);
1777  track->audio.samplerate = 8000;
1778  }
1779 
1780  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1781  if (!track->default_duration && track->video.frame_rate > 0)
1782  track->default_duration = 1000000000 / track->video.frame_rate;
1783  if (track->video.display_width == -1)
1784  track->video.display_width = track->video.pixel_width;
1785  if (track->video.display_height == -1)
1786  track->video.display_height = track->video.pixel_height;
1787  if (track->video.color_space.size == 4)
1788  fourcc = AV_RL32(track->video.color_space.data);
1789  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1790  if (!track->audio.out_samplerate)
1791  track->audio.out_samplerate = track->audio.samplerate;
1792  }
1793  if (encodings_list->nb_elem > 1) {
1794  av_log(matroska->ctx, AV_LOG_ERROR,
1795  "Multiple combined encodings not supported");
1796  } else if (encodings_list->nb_elem == 1) {
1797  if (encodings[0].type) {
1798  if (encodings[0].encryption.key_id.size > 0) {
1799  /* Save the encryption key id to be stored later as a
1800  metadata tag. */
1801  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1802  key_id_base64 = av_malloc(b64_size);
1803  if (key_id_base64 == NULL)
1804  return AVERROR(ENOMEM);
1805 
1806  av_base64_encode(key_id_base64, b64_size,
1807  encodings[0].encryption.key_id.data,
1808  encodings[0].encryption.key_id.size);
1809  } else {
1810  encodings[0].scope = 0;
1811  av_log(matroska->ctx, AV_LOG_ERROR,
1812  "Unsupported encoding type");
1813  }
1814  } else if (
1815 #if CONFIG_ZLIB
1816  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1817 #endif
1818 #if CONFIG_BZLIB
1820 #endif
1821 #if CONFIG_LZO
1823 #endif
1825  encodings[0].scope = 0;
1826  av_log(matroska->ctx, AV_LOG_ERROR,
1827  "Unsupported encoding type");
1828  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1829  uint8_t *codec_priv = track->codec_priv.data;
1830  int ret = matroska_decode_buffer(&track->codec_priv.data,
1831  &track->codec_priv.size,
1832  track);
1833  if (ret < 0) {
1834  track->codec_priv.data = NULL;
1835  track->codec_priv.size = 0;
1836  av_log(matroska->ctx, AV_LOG_ERROR,
1837  "Failed to decode codec private data\n");
1838  }
1839 
1840  if (codec_priv != track->codec_priv.data)
1841  av_free(codec_priv);
1842  }
1843  }
1844 
1845  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1846  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1847  strlen(ff_mkv_codec_tags[j].str))) {
1848  codec_id = ff_mkv_codec_tags[j].id;
1849  break;
1850  }
1851  }
1852 
1853  st = track->stream = avformat_new_stream(s, NULL);
1854  if (!st) {
1855  av_free(key_id_base64);
1856  return AVERROR(ENOMEM);
1857  }
1858 
1859  if (key_id_base64) {
1860  /* export encryption key id as base64 metadata tag */
1861  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
1862  av_freep(&key_id_base64);
1863  }
1864 
1865  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1866  track->codec_priv.size >= 40 &&
1867  track->codec_priv.data) {
1868  track->ms_compat = 1;
1869  bit_depth = AV_RL16(track->codec_priv.data + 14);
1870  fourcc = AV_RL32(track->codec_priv.data + 16);
1872  fourcc);
1873  if (!codec_id)
1875  fourcc);
1876  extradata_offset = 40;
1877  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1878  track->codec_priv.size >= 14 &&
1879  track->codec_priv.data) {
1880  int ret;
1881  ffio_init_context(&b, track->codec_priv.data,
1882  track->codec_priv.size,
1883  0, NULL, NULL, NULL, NULL);
1884  ret = ff_get_wav_header(s, &b, st->codec, track->codec_priv.size, 0);
1885  if (ret < 0)
1886  return ret;
1887  codec_id = st->codec->codec_id;
1888  fourcc = st->codec->codec_tag;
1889  extradata_offset = FFMIN(track->codec_priv.size, 18);
1890  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
1891  /* Normally 36, but allow noncompliant private data */
1892  && (track->codec_priv.size >= 32)
1893  && (track->codec_priv.data)) {
1894  uint16_t sample_size;
1895  int ret = get_qt_codec(track, &fourcc, &codec_id);
1896  if (ret < 0)
1897  return ret;
1898  sample_size = AV_RB16(track->codec_priv.data + 26);
1899  if (fourcc == 0) {
1900  if (sample_size == 8) {
1901  fourcc = MKTAG('r','a','w',' ');
1902  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1903  } else if (sample_size == 16) {
1904  fourcc = MKTAG('t','w','o','s');
1905  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1906  }
1907  }
1908  if ((fourcc == MKTAG('t','w','o','s') ||
1909  fourcc == MKTAG('s','o','w','t')) &&
1910  sample_size == 8)
1911  codec_id = AV_CODEC_ID_PCM_S8;
1912  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1913  (track->codec_priv.size >= 21) &&
1914  (track->codec_priv.data)) {
1915  int ret = get_qt_codec(track, &fourcc, &codec_id);
1916  if (ret < 0)
1917  return ret;
1918  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
1919  fourcc = MKTAG('S','V','Q','3');
1920  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1921  }
1922  if (codec_id == AV_CODEC_ID_NONE) {
1923  char buf[32];
1924  av_get_codec_tag_string(buf, sizeof(buf), fourcc);
1925  av_log(matroska->ctx, AV_LOG_ERROR,
1926  "mov FourCC not found %s.\n", buf);
1927  }
1928  if (track->codec_priv.size >= 86) {
1929  bit_depth = AV_RB16(track->codec_priv.data + 82);
1930  ffio_init_context(&b, track->codec_priv.data,
1931  track->codec_priv.size,
1932  0, NULL, NULL, NULL, NULL);
1933  if (ff_get_qtpalette(codec_id, &b, matroska->palette)) {
1934  bit_depth &= 0x1F;
1935  matroska->has_palette = 1;
1936  }
1937  }
1938  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1939  switch (track->audio.bitdepth) {
1940  case 8:
1941  codec_id = AV_CODEC_ID_PCM_U8;
1942  break;
1943  case 24:
1944  codec_id = AV_CODEC_ID_PCM_S24BE;
1945  break;
1946  case 32:
1947  codec_id = AV_CODEC_ID_PCM_S32BE;
1948  break;
1949  }
1950  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1951  switch (track->audio.bitdepth) {
1952  case 8:
1953  codec_id = AV_CODEC_ID_PCM_U8;
1954  break;
1955  case 24:
1956  codec_id = AV_CODEC_ID_PCM_S24LE;
1957  break;
1958  case 32:
1959  codec_id = AV_CODEC_ID_PCM_S32LE;
1960  break;
1961  }
1962  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1963  track->audio.bitdepth == 64) {
1964  codec_id = AV_CODEC_ID_PCM_F64LE;
1965  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1966  int profile = matroska_aac_profile(track->codec_id);
1967  int sri = matroska_aac_sri(track->audio.samplerate);
1968  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
1969  if (!extradata)
1970  return AVERROR(ENOMEM);
1971  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1972  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1973  if (strstr(track->codec_id, "SBR")) {
1974  sri = matroska_aac_sri(track->audio.out_samplerate);
1975  extradata[2] = 0x56;
1976  extradata[3] = 0xE5;
1977  extradata[4] = 0x80 | (sri << 3);
1978  extradata_size = 5;
1979  } else
1980  extradata_size = 2;
1981  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
1982  /* Only ALAC's magic cookie is stored in Matroska's track headers.
1983  * Create the "atom size", "tag", and "tag version" fields the
1984  * decoder expects manually. */
1985  extradata_size = 12 + track->codec_priv.size;
1986  extradata = av_mallocz(extradata_size +
1988  if (!extradata)
1989  return AVERROR(ENOMEM);
1990  AV_WB32(extradata, extradata_size);
1991  memcpy(&extradata[4], "alac", 4);
1992  AV_WB32(&extradata[8], 0);
1993  memcpy(&extradata[12], track->codec_priv.data,
1994  track->codec_priv.size);
1995  } else if (codec_id == AV_CODEC_ID_TTA) {
1996  extradata_size = 30;
1997  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
1998  if (!extradata)
1999  return AVERROR(ENOMEM);
2000  ffio_init_context(&b, extradata, extradata_size, 1,
2001  NULL, NULL, NULL, NULL);
2002  avio_write(&b, "TTA1", 4);
2003  avio_wl16(&b, 1);
2004  if (track->audio.channels > UINT16_MAX ||
2005  track->audio.bitdepth > UINT16_MAX) {
2006  av_log(matroska->ctx, AV_LOG_WARNING,
2007  "Too large audio channel number %"PRIu64
2008  " or bitdepth %"PRIu64". Skipping track.\n",
2009  track->audio.channels, track->audio.bitdepth);
2010  av_freep(&extradata);
2011  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2012  return AVERROR_INVALIDDATA;
2013  else
2014  continue;
2015  }
2016  avio_wl16(&b, track->audio.channels);
2017  avio_wl16(&b, track->audio.bitdepth);
2018  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2019  return AVERROR_INVALIDDATA;
2020  avio_wl32(&b, track->audio.out_samplerate);
2021  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2022  track->audio.out_samplerate,
2023  AV_TIME_BASE * 1000));
2024  } else if (codec_id == AV_CODEC_ID_RV10 ||
2025  codec_id == AV_CODEC_ID_RV20 ||
2026  codec_id == AV_CODEC_ID_RV30 ||
2027  codec_id == AV_CODEC_ID_RV40) {
2028  extradata_offset = 26;
2029  } else if (codec_id == AV_CODEC_ID_RA_144) {
2030  track->audio.out_samplerate = 8000;
2031  track->audio.channels = 1;
2032  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2033  codec_id == AV_CODEC_ID_COOK ||
2034  codec_id == AV_CODEC_ID_ATRAC3 ||
2035  codec_id == AV_CODEC_ID_SIPR)
2036  && track->codec_priv.data) {
2037  int flavor;
2038 
2039  ffio_init_context(&b, track->codec_priv.data,
2040  track->codec_priv.size,
2041  0, NULL, NULL, NULL, NULL);
2042  avio_skip(&b, 22);
2043  flavor = avio_rb16(&b);
2044  track->audio.coded_framesize = avio_rb32(&b);
2045  avio_skip(&b, 12);
2046  track->audio.sub_packet_h = avio_rb16(&b);
2047  track->audio.frame_size = avio_rb16(&b);
2048  track->audio.sub_packet_size = avio_rb16(&b);
2049  if (flavor < 0 ||
2050  track->audio.coded_framesize <= 0 ||
2051  track->audio.sub_packet_h <= 0 ||
2052  track->audio.frame_size <= 0 ||
2053  track->audio.sub_packet_size <= 0)
2054  return AVERROR_INVALIDDATA;
2055  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2056  track->audio.frame_size);
2057  if (!track->audio.buf)
2058  return AVERROR(ENOMEM);
2059  if (codec_id == AV_CODEC_ID_RA_288) {
2060  st->codec->block_align = track->audio.coded_framesize;
2061  track->codec_priv.size = 0;
2062  } else {
2063  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2064  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2065  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2066  st->codec->bit_rate = sipr_bit_rate[flavor];
2067  }
2068  st->codec->block_align = track->audio.sub_packet_size;
2069  extradata_offset = 78;
2070  }
2071  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2072  ret = matroska_parse_flac(s, track, &extradata_offset);
2073  if (ret < 0)
2074  return ret;
2075  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2076  fourcc = AV_RL32(track->codec_priv.data);
2077  }
2078  track->codec_priv.size -= extradata_offset;
2079 
2080  if (codec_id == AV_CODEC_ID_NONE)
2081  av_log(matroska->ctx, AV_LOG_INFO,
2082  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2083 
2084  if (track->time_scale < 0.01)
2085  track->time_scale = 1.0;
2086  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2087  1000 * 1000 * 1000); /* 64 bit pts in ns */
2088 
2089  /* convert the delay from ns to the track timebase */
2090  track->codec_delay = av_rescale_q(track->codec_delay,
2091  (AVRational){ 1, 1000000000 },
2092  st->time_base);
2093 
2094  st->codec->codec_id = codec_id;
2095 
2096  if (strcmp(track->language, "und"))
2097  av_dict_set(&st->metadata, "language", track->language, 0);
2098  av_dict_set(&st->metadata, "title", track->name, 0);
2099 
2100  if (track->flag_default)
2102  if (track->flag_forced)
2104 
2105  if (!st->codec->extradata) {
2106  if (extradata) {
2107  st->codec->extradata = extradata;
2108  st->codec->extradata_size = extradata_size;
2109  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2110  if (ff_alloc_extradata(st->codec, track->codec_priv.size))
2111  return AVERROR(ENOMEM);
2112  memcpy(st->codec->extradata,
2113  track->codec_priv.data + extradata_offset,
2114  track->codec_priv.size);
2115  }
2116  }
2117 
2118  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2119  MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2120  int display_width_mul = 1;
2121  int display_height_mul = 1;
2122 
2124  st->codec->codec_tag = fourcc;
2125  if (bit_depth >= 0)
2127  st->codec->width = track->video.pixel_width;
2128  st->codec->height = track->video.pixel_height;
2129 
2130  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2131  mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2132 
2134  &st->sample_aspect_ratio.den,
2135  st->codec->height * track->video.display_width * display_width_mul,
2136  st->codec->width * track->video.display_height * display_height_mul,
2137  255);
2138  if (st->codec->codec_id != AV_CODEC_ID_HEVC)
2140 
2141  if (track->default_duration) {
2143  1000000000, track->default_duration, 30000);
2144 #if FF_API_R_FRAME_RATE
2145  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2146  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2147  st->r_frame_rate = st->avg_frame_rate;
2148 #endif
2149  }
2150 
2151  /* export stereo mode flag as metadata tag */
2152  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2153  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2154 
2155  /* export alpha mode flag as metadata tag */
2156  if (track->video.alpha_mode)
2157  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2158 
2159  /* if we have virtual track, mark the real tracks */
2160  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2161  char buf[32];
2162  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2163  continue;
2164  snprintf(buf, sizeof(buf), "%s_%d",
2165  ff_matroska_video_stereo_plane[planes[j].type], i);
2166  for (k=0; k < matroska->tracks.nb_elem; k++)
2167  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2168  av_dict_set(&tracks[k].stream->metadata,
2169  "stereo_mode", buf, 0);
2170  break;
2171  }
2172  }
2173  // add stream level stereo3d side data if it is a supported format
2174  if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2175  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2176  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2177  if (ret < 0)
2178  return ret;
2179  }
2180  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2182  st->codec->codec_tag = fourcc;
2183  st->codec->sample_rate = track->audio.out_samplerate;
2184  st->codec->channels = track->audio.channels;
2185  if (!st->codec->bits_per_coded_sample)
2186  st->codec->bits_per_coded_sample = track->audio.bitdepth;
2187  if (st->codec->codec_id == AV_CODEC_ID_MP3)
2189  else if (st->codec->codec_id != AV_CODEC_ID_AAC)
2191  if (track->codec_delay > 0) {
2192  st->codec->delay = av_rescale_q(track->codec_delay,
2193  st->time_base,
2194  (AVRational){1, st->codec->sample_rate});
2195  }
2196  if (track->seek_preroll > 0) {
2198  av_rescale_q(track->seek_preroll,
2199  (AVRational){1, 1000000000},
2200  (AVRational){1, st->codec->sample_rate}));
2201  }
2202  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2203  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2204 
2205  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2206  st->disposition |= AV_DISPOSITION_CAPTIONS;
2207  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2208  st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2209  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2210  st->disposition |= AV_DISPOSITION_METADATA;
2211  }
2212  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2213  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2214  if (st->codec->codec_id == AV_CODEC_ID_ASS)
2215  matroska->contains_ssa = 1;
2216  }
2217  }
2218 
2219  return 0;
2220 }
2221 
2223 {
2224  MatroskaDemuxContext *matroska = s->priv_data;
2225  EbmlList *attachments_list = &matroska->attachments;
2226  EbmlList *chapters_list = &matroska->chapters;
2227  MatroskaAttachment *attachments;
2228  MatroskaChapter *chapters;
2229  uint64_t max_start = 0;
2230  int64_t pos;
2231  Ebml ebml = { 0 };
2232  int i, j, res;
2233 
2234  matroska->ctx = s;
2235  matroska->cues_parsing_deferred = 1;
2236 
2237  /* First read the EBML header. */
2238  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2239  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2240  ebml_free(ebml_syntax, &ebml);
2241  return AVERROR_INVALIDDATA;
2242  }
2243  if (ebml.version > EBML_VERSION ||
2244  ebml.max_size > sizeof(uint64_t) ||
2245  ebml.id_length > sizeof(uint32_t) ||
2246  ebml.doctype_version > 3) {
2247  av_log(matroska->ctx, AV_LOG_ERROR,
2248  "EBML header using unsupported features\n"
2249  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2250  ebml.version, ebml.doctype, ebml.doctype_version);
2251  ebml_free(ebml_syntax, &ebml);
2252  return AVERROR_PATCHWELCOME;
2253  } else if (ebml.doctype_version == 3) {
2254  av_log(matroska->ctx, AV_LOG_WARNING,
2255  "EBML header using unsupported features\n"
2256  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2257  ebml.version, ebml.doctype, ebml.doctype_version);
2258  }
2259  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2260  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2261  break;
2262  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2263  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2264  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2265  ebml_free(ebml_syntax, &ebml);
2266  return AVERROR_INVALIDDATA;
2267  }
2268  }
2269  ebml_free(ebml_syntax, &ebml);
2270 
2271  /* The next thing is a segment. */
2272  pos = avio_tell(matroska->ctx->pb);
2273  res = ebml_parse(matroska, matroska_segments, matroska);
2274  // try resyncing until we find a EBML_STOP type element.
2275  while (res != 1) {
2276  res = matroska_resync(matroska, pos);
2277  if (res < 0)
2278  return res;
2279  pos = avio_tell(matroska->ctx->pb);
2280  res = ebml_parse(matroska, matroska_segment, matroska);
2281  }
2282  matroska_execute_seekhead(matroska);
2283 
2284  if (!matroska->time_scale)
2285  matroska->time_scale = 1000000;
2286  if (matroska->duration)
2287  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2288  1000 / AV_TIME_BASE;
2289  av_dict_set(&s->metadata, "title", matroska->title, 0);
2290  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2291 
2292  if (matroska->date_utc.size == 8)
2294 
2295  res = matroska_parse_tracks(s);
2296  if (res < 0)
2297  return res;
2298 
2299  attachments = attachments_list->elem;
2300  for (j = 0; j < attachments_list->nb_elem; j++) {
2301  if (!(attachments[j].filename && attachments[j].mime &&
2302  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2303  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2304  } else {
2305  AVStream *st = avformat_new_stream(s, NULL);
2306  if (!st)
2307  break;
2308  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2309  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2311 
2312  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2313  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2314  strlen(ff_mkv_image_mime_tags[i].str))) {
2316  break;
2317  }
2318  }
2319 
2320  attachments[j].stream = st;
2321 
2322  if (st->codec->codec_id != AV_CODEC_ID_NONE) {
2325 
2327  if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2328  return res;
2329  memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2330  st->attached_pic.stream_index = st->index;
2332  } else {
2334  if (ff_alloc_extradata(st->codec, attachments[j].bin.size))
2335  break;
2336  memcpy(st->codec->extradata, attachments[j].bin.data,
2337  attachments[j].bin.size);
2338 
2339  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2340  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2341  strlen(ff_mkv_mime_tags[i].str))) {
2342  st->codec->codec_id = ff_mkv_mime_tags[i].id;
2343  break;
2344  }
2345  }
2346  }
2347  }
2348  }
2349 
2350  chapters = chapters_list->elem;
2351  for (i = 0; i < chapters_list->nb_elem; i++)
2352  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2353  (max_start == 0 || chapters[i].start > max_start)) {
2354  chapters[i].chapter =
2355  avpriv_new_chapter(s, chapters[i].uid,
2356  (AVRational) { 1, 1000000000 },
2357  chapters[i].start, chapters[i].end,
2358  chapters[i].title);
2359  if (chapters[i].chapter) {
2360  av_dict_set(&chapters[i].chapter->metadata,
2361  "title", chapters[i].title, 0);
2362  }
2363  max_start = chapters[i].start;
2364  }
2365 
2366  matroska_add_index_entries(matroska);
2367 
2369 
2370  return 0;
2371 }
2372 
2373 /*
2374  * Put one packet in an application-supplied AVPacket struct.
2375  * Returns 0 on success or -1 on failure.
2376  */
2378  AVPacket *pkt)
2379 {
2380  if (matroska->num_packets > 0) {
2381  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2382  av_freep(&matroska->packets[0]);
2383  if (matroska->has_palette) {
2385  if (!pal) {
2386  av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2387  } else {
2388  memcpy(pal, matroska->palette, AVPALETTE_SIZE);
2389  }
2390  matroska->has_palette = 0;
2391  }
2392  if (matroska->num_packets > 1) {
2393  void *newpackets;
2394  memmove(&matroska->packets[0], &matroska->packets[1],
2395  (matroska->num_packets - 1) * sizeof(AVPacket *));
2396  newpackets = av_realloc(matroska->packets,
2397  (matroska->num_packets - 1) *
2398  sizeof(AVPacket *));
2399  if (newpackets)
2400  matroska->packets = newpackets;
2401  } else {
2402  av_freep(&matroska->packets);
2403  matroska->prev_pkt = NULL;
2404  }
2405  matroska->num_packets--;
2406  return 0;
2407  }
2408 
2409  return -1;
2410 }
2411 
2412 /*
2413  * Free all packets in our internal queue.
2414  */
2416 {
2417  matroska->prev_pkt = NULL;
2418  if (matroska->packets) {
2419  int n;
2420  for (n = 0; n < matroska->num_packets; n++) {
2421  av_packet_unref(matroska->packets[n]);
2422  av_freep(&matroska->packets[n]);
2423  }
2424  av_freep(&matroska->packets);
2425  matroska->num_packets = 0;
2426  }
2427 }
2428 
2430  int *buf_size, int type,
2431  uint32_t **lace_buf, int *laces)
2432 {
2433  int res = 0, n, size = *buf_size;
2434  uint8_t *data = *buf;
2435  uint32_t *lace_size;
2436 
2437  if (!type) {
2438  *laces = 1;
2439  *lace_buf = av_mallocz(sizeof(int));
2440  if (!*lace_buf)
2441  return AVERROR(ENOMEM);
2442 
2443  *lace_buf[0] = size;
2444  return 0;
2445  }
2446 
2447  av_assert0(size > 0);
2448  *laces = *data + 1;
2449  data += 1;
2450  size -= 1;
2451  lace_size = av_mallocz(*laces * sizeof(int));
2452  if (!lace_size)
2453  return AVERROR(ENOMEM);
2454 
2455  switch (type) {
2456  case 0x1: /* Xiph lacing */
2457  {
2458  uint8_t temp;
2459  uint32_t total = 0;
2460  for (n = 0; res == 0 && n < *laces - 1; n++) {
2461  while (1) {
2462  if (size <= total) {
2463  res = AVERROR_INVALIDDATA;
2464  break;
2465  }
2466  temp = *data;
2467  total += temp;
2468  lace_size[n] += temp;
2469  data += 1;
2470  size -= 1;
2471  if (temp != 0xff)
2472  break;
2473  }
2474  }
2475  if (size <= total) {
2476  res = AVERROR_INVALIDDATA;
2477  break;
2478  }
2479 
2480  lace_size[n] = size - total;
2481  break;
2482  }
2483 
2484  case 0x2: /* fixed-size lacing */
2485  if (size % (*laces)) {
2486  res = AVERROR_INVALIDDATA;
2487  break;
2488  }
2489  for (n = 0; n < *laces; n++)
2490  lace_size[n] = size / *laces;
2491  break;
2492 
2493  case 0x3: /* EBML lacing */
2494  {
2495  uint64_t num;
2496  uint64_t total;
2497  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2498  if (n < 0 || num > INT_MAX) {
2499  av_log(matroska->ctx, AV_LOG_INFO,
2500  "EBML block data error\n");
2501  res = n<0 ? n : AVERROR_INVALIDDATA;
2502  break;
2503  }
2504  data += n;
2505  size -= n;
2506  total = lace_size[0] = num;
2507  for (n = 1; res == 0 && n < *laces - 1; n++) {
2508  int64_t snum;
2509  int r;
2510  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2511  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2512  av_log(matroska->ctx, AV_LOG_INFO,
2513  "EBML block data error\n");
2514  res = r<0 ? r : AVERROR_INVALIDDATA;
2515  break;
2516  }
2517  data += r;
2518  size -= r;
2519  lace_size[n] = lace_size[n - 1] + snum;
2520  total += lace_size[n];
2521  }
2522  if (size <= total) {
2523  res = AVERROR_INVALIDDATA;
2524  break;
2525  }
2526  lace_size[*laces - 1] = size - total;
2527  break;
2528  }
2529  }
2530 
2531  *buf = data;
2532  *lace_buf = lace_size;
2533  *buf_size = size;
2534 
2535  return res;
2536 }
2537 
2539  MatroskaTrack *track, AVStream *st,
2540  uint8_t *data, int size, uint64_t timecode,
2541  int64_t pos)
2542 {
2543  int a = st->codec->block_align;
2544  int sps = track->audio.sub_packet_size;
2545  int cfs = track->audio.coded_framesize;
2546  int h = track->audio.sub_packet_h;
2547  int y = track->audio.sub_packet_cnt;
2548  int w = track->audio.frame_size;
2549  int x;
2550 
2551  if (!track->audio.pkt_cnt) {
2552  if (track->audio.sub_packet_cnt == 0)
2553  track->audio.buf_timecode = timecode;
2554  if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2555  if (size < cfs * h / 2) {
2556  av_log(matroska->ctx, AV_LOG_ERROR,
2557  "Corrupt int4 RM-style audio packet size\n");
2558  return AVERROR_INVALIDDATA;
2559  }
2560  for (x = 0; x < h / 2; x++)
2561  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2562  data + x * cfs, cfs);
2563  } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2564  if (size < w) {
2565  av_log(matroska->ctx, AV_LOG_ERROR,
2566  "Corrupt sipr RM-style audio packet size\n");
2567  return AVERROR_INVALIDDATA;
2568  }
2569  memcpy(track->audio.buf + y * w, data, w);
2570  } else {
2571  if (size < sps * w / sps || h<=0 || w%sps) {
2572  av_log(matroska->ctx, AV_LOG_ERROR,
2573  "Corrupt generic RM-style audio packet size\n");
2574  return AVERROR_INVALIDDATA;
2575  }
2576  for (x = 0; x < w / sps; x++)
2577  memcpy(track->audio.buf +
2578  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2579  data + x * sps, sps);
2580  }
2581 
2582  if (++track->audio.sub_packet_cnt >= h) {
2583  if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2584  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2585  track->audio.sub_packet_cnt = 0;
2586  track->audio.pkt_cnt = h * w / a;
2587  }
2588  }
2589 
2590  while (track->audio.pkt_cnt) {
2591  int ret;
2592  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2593  if (!pkt)
2594  return AVERROR(ENOMEM);
2595 
2596  ret = av_new_packet(pkt, a);
2597  if (ret < 0) {
2598  av_free(pkt);
2599  return ret;
2600  }
2601  memcpy(pkt->data,
2602  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2603  a);
2604  pkt->pts = track->audio.buf_timecode;
2606  pkt->pos = pos;
2607  pkt->stream_index = st->index;
2608  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2609  }
2610 
2611  return 0;
2612 }
2613 
2614 /* reconstruct full wavpack blocks from mangled matroska ones */
2616  uint8_t **pdst, int *size)
2617 {
2618  uint8_t *dst = NULL;
2619  int dstlen = 0;
2620  int srclen = *size;
2621  uint32_t samples;
2622  uint16_t ver;
2623  int ret, offset = 0;
2624 
2625  if (srclen < 12 || track->stream->codec->extradata_size < 2)
2626  return AVERROR_INVALIDDATA;
2627 
2628  ver = AV_RL16(track->stream->codec->extradata);
2629 
2630  samples = AV_RL32(src);
2631  src += 4;
2632  srclen -= 4;
2633 
2634  while (srclen >= 8) {
2635  int multiblock;
2636  uint32_t blocksize;
2637  uint8_t *tmp;
2638 
2639  uint32_t flags = AV_RL32(src);
2640  uint32_t crc = AV_RL32(src + 4);
2641  src += 8;
2642  srclen -= 8;
2643 
2644  multiblock = (flags & 0x1800) != 0x1800;
2645  if (multiblock) {
2646  if (srclen < 4) {
2647  ret = AVERROR_INVALIDDATA;
2648  goto fail;
2649  }
2650  blocksize = AV_RL32(src);
2651  src += 4;
2652  srclen -= 4;
2653  } else
2654  blocksize = srclen;
2655 
2656  if (blocksize > srclen) {
2657  ret = AVERROR_INVALIDDATA;
2658  goto fail;
2659  }
2660 
2661  tmp = av_realloc(dst, dstlen + blocksize + 32);
2662  if (!tmp) {
2663  ret = AVERROR(ENOMEM);
2664  goto fail;
2665  }
2666  dst = tmp;
2667  dstlen += blocksize + 32;
2668 
2669  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2670  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2671  AV_WL16(dst + offset + 8, ver); // version
2672  AV_WL16(dst + offset + 10, 0); // track/index_no
2673  AV_WL32(dst + offset + 12, 0); // total samples
2674  AV_WL32(dst + offset + 16, 0); // block index
2675  AV_WL32(dst + offset + 20, samples); // number of samples
2676  AV_WL32(dst + offset + 24, flags); // flags
2677  AV_WL32(dst + offset + 28, crc); // crc
2678  memcpy(dst + offset + 32, src, blocksize); // block data
2679 
2680  src += blocksize;
2681  srclen -= blocksize;
2682  offset += blocksize + 32;
2683  }
2684 
2685  *pdst = dst;
2686  *size = dstlen;
2687 
2688  return 0;
2689 
2690 fail:
2691  av_freep(&dst);
2692  return ret;
2693 }
2694 
2696  MatroskaTrack *track,
2697  AVStream *st,
2698  uint8_t *data, int data_len,
2699  uint64_t timecode,
2700  uint64_t duration,
2701  int64_t pos)
2702 {
2703  AVPacket *pkt;
2704  uint8_t *id, *settings, *text, *buf;
2705  int id_len, settings_len, text_len;
2706  uint8_t *p, *q;
2707  int err;
2708 
2709  if (data_len <= 0)
2710  return AVERROR_INVALIDDATA;
2711 
2712  p = data;
2713  q = data + data_len;
2714 
2715  id = p;
2716  id_len = -1;
2717  while (p < q) {
2718  if (*p == '\r' || *p == '\n') {
2719  id_len = p - id;
2720  if (*p == '\r')
2721  p++;
2722  break;
2723  }
2724  p++;
2725  }
2726 
2727  if (p >= q || *p != '\n')
2728  return AVERROR_INVALIDDATA;
2729  p++;
2730 
2731  settings = p;
2732  settings_len = -1;
2733  while (p < q) {
2734  if (*p == '\r' || *p == '\n') {
2735  settings_len = p - settings;
2736  if (*p == '\r')
2737  p++;
2738  break;
2739  }
2740  p++;
2741  }
2742 
2743  if (p >= q || *p != '\n')
2744  return AVERROR_INVALIDDATA;
2745  p++;
2746 
2747  text = p;
2748  text_len = q - p;
2749  while (text_len > 0) {
2750  const int len = text_len - 1;
2751  const uint8_t c = p[len];
2752  if (c != '\r' && c != '\n')
2753  break;
2754  text_len = len;
2755  }
2756 
2757  if (text_len <= 0)
2758  return AVERROR_INVALIDDATA;
2759 
2760  pkt = av_mallocz(sizeof(*pkt));
2761  if (!pkt)
2762  return AVERROR(ENOMEM);
2763  err = av_new_packet(pkt, text_len);
2764  if (err < 0) {
2765  av_free(pkt);
2766  return AVERROR(err);
2767  }
2768 
2769  memcpy(pkt->data, text, text_len);
2770 
2771  if (id_len > 0) {
2772  buf = av_packet_new_side_data(pkt,
2774  id_len);
2775  if (!buf) {
2776  av_free(pkt);
2777  return AVERROR(ENOMEM);
2778  }
2779  memcpy(buf, id, id_len);
2780  }
2781 
2782  if (settings_len > 0) {
2783  buf = av_packet_new_side_data(pkt,
2785  settings_len);
2786  if (!buf) {
2787  av_free(pkt);
2788  return AVERROR(ENOMEM);
2789  }
2790  memcpy(buf, settings, settings_len);
2791  }
2792 
2793  // Do we need this for subtitles?
2794  // pkt->flags = AV_PKT_FLAG_KEY;
2795 
2796  pkt->stream_index = st->index;
2797  pkt->pts = timecode;
2798 
2799  // Do we need this for subtitles?
2800  // pkt->dts = timecode;
2801 
2802  pkt->duration = duration;
2803  pkt->pos = pos;
2804 
2805  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2806  matroska->prev_pkt = pkt;
2807 
2808  return 0;
2809 }
2810 
2812  MatroskaTrack *track, AVStream *st,
2813  uint8_t *data, int pkt_size,
2814  uint64_t timecode, uint64_t lace_duration,
2815  int64_t pos, int is_keyframe,
2816  uint8_t *additional, uint64_t additional_id, int additional_size,
2817  int64_t discard_padding)
2818 {
2819  MatroskaTrackEncoding *encodings = track->encodings.elem;
2820  uint8_t *pkt_data = data;
2821  int offset = 0, res;
2822  AVPacket *pkt;
2823 
2824  if (encodings && !encodings->type && encodings->scope & 1) {
2825  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2826  if (res < 0)
2827  return res;
2828  }
2829 
2830  if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2831  uint8_t *wv_data;
2832  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2833  if (res < 0) {
2834  av_log(matroska->ctx, AV_LOG_ERROR,
2835  "Error parsing a wavpack block.\n");
2836  goto fail;
2837  }
2838  if (pkt_data != data)
2839  av_freep(&pkt_data);
2840  pkt_data = wv_data;
2841  }
2842 
2843  if (st->codec->codec_id == AV_CODEC_ID_PRORES &&
2844  AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
2845  offset = 8;
2846 
2847  pkt = av_mallocz(sizeof(AVPacket));
2848  if (!pkt) {
2849  if (pkt_data != data)
2850  av_freep(&pkt_data);
2851  return AVERROR(ENOMEM);
2852  }
2853  /* XXX: prevent data copy... */
2854  if (av_new_packet(pkt, pkt_size + offset) < 0) {
2855  av_free(pkt);
2856  res = AVERROR(ENOMEM);
2857  goto fail;
2858  }
2859 
2860  if (st->codec->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
2861  uint8_t *buf = pkt->data;
2862  bytestream_put_be32(&buf, pkt_size);
2863  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2864  }
2865 
2866  memcpy(pkt->data + offset, pkt_data, pkt_size);
2867 
2868  if (pkt_data != data)
2869  av_freep(&pkt_data);
2870 
2871  pkt->flags = is_keyframe;
2872  pkt->stream_index = st->index;
2873 
2874  if (additional_size > 0) {
2875  uint8_t *side_data = av_packet_new_side_data(pkt,
2877  additional_size + 8);
2878  if (!side_data) {
2879  av_packet_unref(pkt);
2880  av_free(pkt);
2881  return AVERROR(ENOMEM);
2882  }
2883  AV_WB64(side_data, additional_id);
2884  memcpy(side_data + 8, additional, additional_size);
2885  }
2886 
2887  if (discard_padding) {
2888  uint8_t *side_data = av_packet_new_side_data(pkt,
2890  10);
2891  if (!side_data) {
2892  av_packet_unref(pkt);
2893  av_free(pkt);
2894  return AVERROR(ENOMEM);
2895  }
2896  AV_WL32(side_data, 0);
2897  AV_WL32(side_data + 4, av_rescale_q(discard_padding,
2898  (AVRational){1, 1000000000},
2899  (AVRational){1, st->codec->sample_rate}));
2900  }
2901 
2902  if (track->ms_compat)
2903  pkt->dts = timecode;
2904  else
2905  pkt->pts = timecode;
2906  pkt->pos = pos;
2907  pkt->duration = lace_duration;
2908 
2909 #if FF_API_CONVERGENCE_DURATION
2911  if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
2912  pkt->convergence_duration = lace_duration;
2913  }
2915 #endif
2916 
2917  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2918  matroska->prev_pkt = pkt;
2919 
2920  return 0;
2921 
2922 fail:
2923  if (pkt_data != data)
2924  av_freep(&pkt_data);
2925  return res;
2926 }
2927 
2929  int size, int64_t pos, uint64_t cluster_time,
2930  uint64_t block_duration, int is_keyframe,
2931  uint8_t *additional, uint64_t additional_id, int additional_size,
2932  int64_t cluster_pos, int64_t discard_padding)
2933 {
2934  uint64_t timecode = AV_NOPTS_VALUE;
2935  MatroskaTrack *track;
2936  int res = 0;
2937  AVStream *st;
2938  int16_t block_time;
2939  uint32_t *lace_size = NULL;
2940  int n, flags, laces = 0;
2941  uint64_t num;
2942  int trust_default_duration = 1;
2943 
2944  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2945  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2946  return n;
2947  }
2948  data += n;
2949  size -= n;
2950 
2951  track = matroska_find_track_by_num(matroska, num);
2952  if (!track || !track->stream) {
2953  av_log(matroska->ctx, AV_LOG_INFO,
2954  "Invalid stream %"PRIu64" or size %u\n", num, size);
2955  return AVERROR_INVALIDDATA;
2956  } else if (size <= 3)
2957  return 0;
2958  st = track->stream;
2959  if (st->discard >= AVDISCARD_ALL)
2960  return res;
2961  av_assert1(block_duration != AV_NOPTS_VALUE);
2962 
2963  block_time = sign_extend(AV_RB16(data), 16);
2964  data += 2;
2965  flags = *data++;
2966  size -= 3;
2967  if (is_keyframe == -1)
2968  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2969 
2970  if (cluster_time != (uint64_t) -1 &&
2971  (block_time >= 0 || cluster_time >= -block_time)) {
2972  timecode = cluster_time + block_time - track->codec_delay;
2973  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2974  timecode < track->end_timecode)
2975  is_keyframe = 0; /* overlapping subtitles are not key frame */
2976  if (is_keyframe)
2977  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2979  }
2980 
2981  if (matroska->skip_to_keyframe &&
2982  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2983  if (timecode < matroska->skip_to_timecode)
2984  return res;
2985  if (is_keyframe)
2986  matroska->skip_to_keyframe = 0;
2987  else if (!st->skip_to_keyframe) {
2988  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
2989  matroska->skip_to_keyframe = 0;
2990  }
2991  }
2992 
2993  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2994  &lace_size, &laces);
2995 
2996  if (res)
2997  goto end;
2998 
2999  if (track->audio.samplerate == 8000) {
3000  // If this is needed for more codecs, then add them here
3001  if (st->codec->codec_id == AV_CODEC_ID_AC3) {
3002  if (track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
3003  trust_default_duration = 0;
3004  }
3005  }
3006 
3007  if (!block_duration && trust_default_duration)
3008  block_duration = track->default_duration * laces / matroska->time_scale;
3009 
3010  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3011  track->end_timecode =
3012  FFMAX(track->end_timecode, timecode + block_duration);
3013 
3014  for (n = 0; n < laces; n++) {
3015  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3016 
3017  if (lace_size[n] > size) {
3018  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3019  break;
3020  }
3021 
3022  if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
3023  st->codec->codec_id == AV_CODEC_ID_COOK ||
3024  st->codec->codec_id == AV_CODEC_ID_SIPR ||
3025  st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
3026  st->codec->block_align && track->audio.sub_packet_size) {
3027  res = matroska_parse_rm_audio(matroska, track, st, data,
3028  lace_size[n],
3029  timecode, pos);
3030  if (res)
3031  goto end;
3032 
3033  } else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
3034  res = matroska_parse_webvtt(matroska, track, st,
3035  data, lace_size[n],
3036  timecode, lace_duration,
3037  pos);
3038  if (res)
3039  goto end;
3040  } else {
3041  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
3042  timecode, lace_duration, pos,
3043  !n ? is_keyframe : 0,
3044  additional, additional_id, additional_size,
3045  discard_padding);
3046  if (res)
3047  goto end;
3048  }
3049 
3050  if (timecode != AV_NOPTS_VALUE)
3051  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3052  data += lace_size[n];
3053  size -= lace_size[n];
3054  }
3055 
3056 end:
3057  av_free(lace_size);
3058  return res;
3059 }
3060 
3062 {
3063  EbmlList *blocks_list;
3064  MatroskaBlock *blocks;
3065  int i, res;
3066  res = ebml_parse(matroska,
3067  matroska_cluster_incremental_parsing,
3068  &matroska->current_cluster);
3069  if (res == 1) {
3070  /* New Cluster */
3071  if (matroska->current_cluster_pos)
3072  ebml_level_end(matroska);
3073  ebml_free(matroska_cluster, &matroska->current_cluster);
3074  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3075  matroska->current_cluster_num_blocks = 0;
3076  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3077  matroska->prev_pkt = NULL;
3078  /* sizeof the ID which was already read */
3079  if (matroska->current_id)
3080  matroska->current_cluster_pos -= 4;
3081  res = ebml_parse(matroska,
3082  matroska_clusters_incremental,
3083  &matroska->current_cluster);
3084  /* Try parsing the block again. */
3085  if (res == 1)
3086  res = ebml_parse(matroska,
3087  matroska_cluster_incremental_parsing,
3088  &matroska->current_cluster);
3089  }
3090 
3091  if (!res &&
3092  matroska->current_cluster_num_blocks <
3093  matroska->current_cluster.blocks.nb_elem) {
3094  blocks_list = &matroska->current_cluster.blocks;
3095  blocks = blocks_list->elem;
3096 
3097  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3098  i = blocks_list->nb_elem - 1;
3099  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3100  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3101  uint8_t* additional = blocks[i].additional.size > 0 ?
3102  blocks[i].additional.data : NULL;
3103  if (!blocks[i].non_simple)
3104  blocks[i].duration = 0;
3105  res = matroska_parse_block(matroska, blocks[i].bin.data,
3106  blocks[i].bin.size, blocks[i].bin.pos,
3107  matroska->current_cluster.timecode,
3108  blocks[i].duration, is_keyframe,
3109  additional, blocks[i].additional_id,
3110  blocks[i].additional.size,
3111  matroska->current_cluster_pos,
3112  blocks[i].discard_padding);
3113  }
3114  }
3115 
3116  return res;
3117 }
3118 
3120 {
3121  MatroskaCluster cluster = { 0 };
3122  EbmlList *blocks_list;
3123  MatroskaBlock *blocks;
3124  int i, res;
3125  int64_t pos;
3126 
3127  if (!matroska->contains_ssa)
3128  return matroska_parse_cluster_incremental(matroska);
3129  pos = avio_tell(matroska->ctx->pb);
3130  matroska->prev_pkt = NULL;
3131  if (matroska->current_id)
3132  pos -= 4; /* sizeof the ID which was already read */
3133  res = ebml_parse(matroska, matroska_clusters, &cluster);
3134  blocks_list = &cluster.blocks;
3135  blocks = blocks_list->elem;
3136  for (i = 0; i < blocks_list->nb_elem; i++)
3137  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3138  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3139  res = matroska_parse_block(matroska, blocks[i].bin.data,
3140  blocks[i].bin.size, blocks[i].bin.pos,
3141  cluster.timecode, blocks[i].duration,
3142  is_keyframe, NULL, 0, 0, pos,
3143  blocks[i].discard_padding);
3144  }
3145  ebml_free(matroska_cluster, &cluster);
3146  return res;
3147 }
3148 
3150 {
3151  MatroskaDemuxContext *matroska = s->priv_data;
3152 
3153  while (matroska_deliver_packet(matroska, pkt)) {
3154  int64_t pos = avio_tell(matroska->ctx->pb);
3155  if (matroska->done)
3156  return AVERROR_EOF;
3157  if (matroska_parse_cluster(matroska) < 0)
3158  matroska_resync(matroska, pos);
3159  }
3160 
3161  return 0;
3162 }
3163 
3164 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3165  int64_t timestamp, int flags)
3166 {
3167  MatroskaDemuxContext *matroska = s->priv_data;
3168  MatroskaTrack *tracks = NULL;
3169  AVStream *st = s->streams[stream_index];
3170  int i, index, index_sub, index_min;
3171 
3172  /* Parse the CUES now since we need the index data to seek. */
3173  if (matroska->cues_parsing_deferred > 0) {
3174  matroska->cues_parsing_deferred = 0;
3175  matroska_parse_cues(matroska);
3176  }
3177 
3178  if (!st->nb_index_entries)
3179  goto err;
3180  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3181 
3182  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3183  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3184  SEEK_SET);
3185  matroska->current_id = 0;
3186  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3187  matroska_clear_queue(matroska);
3188  if (matroska_parse_cluster(matroska) < 0)
3189  break;
3190  }
3191  }
3192 
3193  matroska_clear_queue(matroska);
3194  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3195  goto err;
3196 
3197  index_min = index;
3198  tracks = matroska->tracks.elem;
3199  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3200  tracks[i].audio.pkt_cnt = 0;
3201  tracks[i].audio.sub_packet_cnt = 0;
3202  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3203  tracks[i].end_timecode = 0;
3204  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3205  tracks[i].stream &&
3206  tracks[i].stream->discard != AVDISCARD_ALL) {
3207  index_sub = av_index_search_timestamp(
3208  tracks[i].stream, st->index_entries[index].timestamp,
3210  while (index_sub >= 0 &&
3211  index_min > 0 &&
3212  tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3213  st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3214  index_min--;
3215  }
3216  }
3217 
3218  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3219  matroska->current_id = 0;
3220  if (flags & AVSEEK_FLAG_ANY) {
3221  st->skip_to_keyframe = 0;
3222  matroska->skip_to_timecode = timestamp;
3223  } else {
3224  st->skip_to_keyframe = 1;
3225  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3226  }
3227  matroska->skip_to_keyframe = 1;
3228  matroska->done = 0;
3229  matroska->num_levels = 0;
3230  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3231  return 0;
3232 err:
3233  // slightly hackish but allows proper fallback to
3234  // the generic seeking code.
3235  matroska_clear_queue(matroska);
3236  matroska->current_id = 0;
3237  st->skip_to_keyframe =
3238  matroska->skip_to_keyframe = 0;
3239  matroska->done = 0;
3240  matroska->num_levels = 0;
3241  return -1;
3242 }
3243 
3245 {
3246  MatroskaDemuxContext *matroska = s->priv_data;
3247  MatroskaTrack *tracks = matroska->tracks.elem;
3248  int n;
3249 
3250  matroska_clear_queue(matroska);
3251 
3252  for (n = 0; n < matroska->tracks.nb_elem; n++)
3253  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3254  av_freep(&tracks[n].audio.buf);
3255  ebml_free(matroska_cluster, &matroska->current_cluster);
3256  ebml_free(matroska_segment, matroska);
3257 
3258  return 0;
3259 }
3260 
3261 typedef struct {
3262  int64_t start_time_ns;
3263  int64_t end_time_ns;
3264  int64_t start_offset;
3265  int64_t end_offset;
3266 } CueDesc;
3267 
3268 /* This function searches all the Cues and returns the CueDesc corresponding the
3269  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3270  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3271  */
3272 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3273  MatroskaDemuxContext *matroska = s->priv_data;
3274  CueDesc cue_desc;
3275  int i;
3276  int nb_index_entries = s->streams[0]->nb_index_entries;
3277  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3278  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3279  for (i = 1; i < nb_index_entries; i++) {
3280  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3281  index_entries[i].timestamp * matroska->time_scale > ts) {
3282  break;
3283  }
3284  }
3285  --i;
3286  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3287  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3288  if (i != nb_index_entries - 1) {
3289  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3290  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3291  } else {
3292  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3293  // FIXME: this needs special handling for files where Cues appear
3294  // before Clusters. the current logic assumes Cues appear after
3295  // Clusters.
3296  cue_desc.end_offset = cues_start - matroska->segment_start;
3297  }
3298  return cue_desc;
3299 }
3300 
3302 {
3303  MatroskaDemuxContext *matroska = s->priv_data;
3304  int64_t cluster_pos, before_pos;
3305  int index, rv = 1;
3306  if (s->streams[0]->nb_index_entries <= 0) return 0;
3307  // seek to the first cluster using cues.
3308  index = av_index_search_timestamp(s->streams[0], 0, 0);
3309  if (index < 0) return 0;
3310  cluster_pos = s->streams[0]->index_entries[index].pos;
3311  before_pos = avio_tell(s->pb);
3312  while (1) {
3313  int64_t cluster_id = 0, cluster_length = 0;
3314  AVPacket *pkt;
3315  avio_seek(s->pb, cluster_pos, SEEK_SET);
3316  // read cluster id and length
3317  ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3318  ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3319  if (cluster_id != 0xF43B675) { // done with all clusters
3320  break;
3321  }
3322  avio_seek(s->pb, cluster_pos, SEEK_SET);
3323  matroska->current_id = 0;
3324  matroska_clear_queue(matroska);
3325  if (matroska_parse_cluster(matroska) < 0 ||
3326  matroska->num_packets <= 0) {
3327  break;
3328  }
3329  pkt = matroska->packets[0];
3330  cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3331  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3332  rv = 0;
3333  break;
3334  }
3335  }
3336  avio_seek(s->pb, before_pos, SEEK_SET);
3337  return rv;
3338 }
3339 
3340 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3341  double min_buffer, double* buffer,
3342  double* sec_to_download, AVFormatContext *s,
3343  int64_t cues_start)
3344 {
3345  double nano_seconds_per_second = 1000000000.0;
3346  double time_sec = time_ns / nano_seconds_per_second;
3347  int rv = 0;
3348  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3349  int64_t end_time_ns = time_ns + time_to_search_ns;
3350  double sec_downloaded = 0.0;
3351  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3352  if (desc_curr.start_time_ns == -1)
3353  return -1;
3354  *sec_to_download = 0.0;
3355 
3356  // Check for non cue start time.
3357  if (time_ns > desc_curr.start_time_ns) {
3358  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3359  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3360  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3361  double timeToDownload = (cueBytes * 8.0) / bps;
3362 
3363  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3364  *sec_to_download += timeToDownload;
3365 
3366  // Check if the search ends within the first cue.
3367  if (desc_curr.end_time_ns >= end_time_ns) {
3368  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3369  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3370  sec_downloaded = percent_to_sub * sec_downloaded;
3371  *sec_to_download = percent_to_sub * *sec_to_download;
3372  }
3373 
3374  if ((sec_downloaded + *buffer) <= min_buffer) {
3375  return 1;
3376  }
3377 
3378  // Get the next Cue.
3379  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3380  }
3381 
3382  while (desc_curr.start_time_ns != -1) {
3383  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3384  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3385  double desc_sec = desc_ns / nano_seconds_per_second;
3386  double bits = (desc_bytes * 8.0);
3387  double time_to_download = bits / bps;
3388 
3389  sec_downloaded += desc_sec - time_to_download;
3390  *sec_to_download += time_to_download;
3391 
3392  if (desc_curr.end_time_ns >= end_time_ns) {
3393  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3394  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3395  sec_downloaded = percent_to_sub * sec_downloaded;
3396  *sec_to_download = percent_to_sub * *sec_to_download;
3397 
3398  if ((sec_downloaded + *buffer) <= min_buffer)
3399  rv = 1;
3400  break;
3401  }
3402 
3403  if ((sec_downloaded + *buffer) <= min_buffer) {
3404  rv = 1;
3405  break;
3406  }
3407 
3408  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3409  }
3410  *buffer = *buffer + sec_downloaded;
3411  return rv;
3412 }
3413 
3414 /* This function computes the bandwidth of the WebM file with the help of
3415  * buffer_size_after_time_downloaded() function. Both of these functions are
3416  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3417  * Matroska parsing mechanism.
3418  *
3419  * Returns the bandwidth of the file on success; -1 on error.
3420  * */
3421 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3422 {
3423  MatroskaDemuxContext *matroska = s->priv_data;
3424  AVStream *st = s->streams[0];
3425  double bandwidth = 0.0;
3426  int i;
3427 
3428  for (i = 0; i < st->nb_index_entries; i++) {
3429  int64_t prebuffer_ns = 1000000000;
3430  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3431  double nano_seconds_per_second = 1000000000.0;
3432  int64_t prebuffered_ns = time_ns + prebuffer_ns;
3433  double prebuffer_bytes = 0.0;
3434  int64_t temp_prebuffer_ns = prebuffer_ns;
3435  int64_t pre_bytes, pre_ns;
3436  double pre_sec, prebuffer, bits_per_second;
3437  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3438 
3439  // Start with the first Cue.
3440  CueDesc desc_end = desc_beg;
3441 
3442  // Figure out how much data we have downloaded for the prebuffer. This will
3443  // be used later to adjust the bits per sample to try.
3444  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3445  // Prebuffered the entire Cue.
3446  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3447  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3448  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3449  }
3450  if (desc_end.start_time_ns == -1) {
3451  // The prebuffer is larger than the duration.
3452  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3453  return -1;
3454  bits_per_second = 0.0;
3455  } else {
3456  // The prebuffer ends in the last Cue. Estimate how much data was
3457  // prebuffered.
3458  pre_bytes = desc_end.end_offset - desc_end.start_offset;
3459  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3460  pre_sec = pre_ns / nano_seconds_per_second;
3461  prebuffer_bytes +=
3462  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3463 
3464  prebuffer = prebuffer_ns / nano_seconds_per_second;
3465 
3466  // Set this to 0.0 in case our prebuffer buffers the entire video.
3467  bits_per_second = 0.0;
3468  do {
3469  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3470  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3471  double desc_sec = desc_ns / nano_seconds_per_second;
3472  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3473 
3474  // Drop the bps by the percentage of bytes buffered.
3475  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3476  double mod_bits_per_second = calc_bits_per_second * percent;
3477 
3478  if (prebuffer < desc_sec) {
3479  double search_sec =
3480  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3481 
3482  // Add 1 so the bits per second should be a little bit greater than file
3483  // datarate.
3484  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3485  const double min_buffer = 0.0;
3486  double buffer = prebuffer;
3487  double sec_to_download = 0.0;
3488 
3489  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3490  min_buffer, &buffer, &sec_to_download,
3491  s, cues_start);
3492  if (rv < 0) {
3493  return -1;
3494  } else if (rv == 0) {
3495  bits_per_second = (double)(bps);
3496  break;
3497  }
3498  }
3499 
3500  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3501  } while (desc_end.start_time_ns != -1);
3502  }
3503  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3504  }
3505  return (int64_t)bandwidth;
3506 }
3507 
3509 {
3510  MatroskaDemuxContext *matroska = s->priv_data;
3511  EbmlList *seekhead_list = &matroska->seekhead;
3512  MatroskaSeekhead *seekhead = seekhead_list->elem;
3513  char *buf;
3514  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3515  int i;
3516 
3517  // determine cues start and end positions
3518  for (i = 0; i < seekhead_list->nb_elem; i++)
3519  if (seekhead[i].id == MATROSKA_ID_CUES)
3520  break;
3521 
3522  if (i >= seekhead_list->nb_elem) return -1;
3523 
3524  before_pos = avio_tell(matroska->ctx->pb);
3525  cues_start = seekhead[i].pos + matroska->segment_start;
3526  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3527  // cues_end is computed as cues_start + cues_length + length of the
3528  // Cues element ID + EBML length of the Cues element. cues_end is
3529  // inclusive and the above sum is reduced by 1.
3530  uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3531  bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3532  bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3533  cues_end = cues_start + cues_length + bytes_read - 1;
3534  }
3535  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3536  if (cues_start == -1 || cues_end == -1) return -1;
3537 
3538  // parse the cues
3539  matroska_parse_cues(matroska);
3540 
3541  // cues start
3542  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3543 
3544  // cues end
3545  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3546 
3547  // bandwidth
3548  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3549  if (bandwidth < 0) return -1;
3550  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3551 
3552  // check if all clusters start with key frames
3554 
3555  // store cue point timestamps as a comma separated list for checking subsegment alignment in
3556  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3557  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3558  if (!buf) return -1;
3559  strcpy(buf, "");
3560  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3561  snprintf(buf, (i + 1) * 20 * sizeof(char),
3562  "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3563  if (i != s->streams[0]->nb_index_entries - 1)
3564  strncat(buf, ",", sizeof(char));
3565  }
3566  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3567  av_free(buf);
3568 
3569  return 0;
3570 }
3571 
3573 {
3574  char *buf;
3575  int ret = matroska_read_header(s);
3576  MatroskaTrack *tracks;
3577  MatroskaDemuxContext *matroska = s->priv_data;
3578  if (ret) {
3579  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3580  return -1;
3581  }
3582 
3583  if (!matroska->is_live) {
3584  buf = av_asprintf("%g", matroska->duration);
3585  if (!buf) return AVERROR(ENOMEM);
3586  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3587  av_free(buf);
3588 
3589  // initialization range
3590  // 5 is the offset of Cluster ID.
3592  }
3593 
3594  // basename of the file
3595  buf = strrchr(s->filename, '/');
3596  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3597 
3598  // track number
3599  tracks = matroska->tracks.elem;
3600  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3601 
3602  // parse the cues and populate Cue related fields
3603  return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3604 }
3605 
3607 {
3608  return AVERROR_EOF;
3609 }
3610 
3611 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3612 static const AVOption options[] = {
3613  { "live", "flag indicating that the input is a live file that only has the headers.", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
3614  { NULL },
3615 };
3616 
3617 static const AVClass webm_dash_class = {
3618  .class_name = "WebM DASH Manifest demuxer",
3619  .item_name = av_default_item_name,
3620  .option = options,
3621  .version = LIBAVUTIL_VERSION_INT,
3622 };
3623 
3625  .name = "matroska,webm",
3626  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3627  .extensions = "mkv,mk3d,mka,mks",
3628  .priv_data_size = sizeof(MatroskaDemuxContext),
3634  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3635 };
3636 
3638  .name = "webm_dash_manifest",
3639  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3640  .priv_data_size = sizeof(MatroskaDemuxContext),
3644  .priv_class = &webm_dash_class,
3645 };
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
const char * s
Definition: matroskadec.c:92
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2348
#define AV_DISPOSITION_METADATA
Definition: avformat.h:861
#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:424
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:2538
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:603
uint64_t seek_preroll
Definition: matroskadec.c:182
uint32_t palette[AVPALETTE_COUNT]
Definition: matroskadec.c:318
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:534
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1404
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1392
uint64_t type
Definition: matroskadec.c:173
static const EbmlSyntax matroska_tracks[]
Definition: matroskadec.c:462
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:101
static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3606
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2377
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
uint64_t version
Definition: matroskadec.c:109
AVOption.
Definition: opt.h:245
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:3624
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:1778
enum AVCodecID id
Definition: mxfenc.c:104
static const EbmlSyntax matroska_info[]
Definition: matroskadec.c:348
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:156
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2821
#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:700
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1597
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
#define INITIALIZATION_RANGE
Definition: matroska.h:290
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1487
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:921
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3301
else temp
Definition: vf_mcdeint.c:259
static const EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:544
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:4149
int64_t pos
Definition: avformat.h:817
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:137
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:131
uint64_t chapteruid
Definition: matroskadec.c:235
static const EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:359
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2350
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:327
EbmlList tag
Definition: matroskadec.c:241
uint64_t uid
Definition: matroskadec.c:172
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
MatroskaCluster current_cluster
Definition: matroskadec.c:310
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:2811
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:949
#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:878
#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:208
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:210
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1080
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:201
uint64_t flag_forced
Definition: matroskadec.c:181
int av_log2(unsigned v)
Definition: intmath.c:26
uint64_t max_size
Definition: matroskadec.c:110
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:177
uint64_t flag_default
Definition: matroskadec.c:180
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:119
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:124
static const EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:411
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:132
char * name
Definition: matroskadec.c:224
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:282
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:2668
union EbmlSyntax::@174 def
int version
Definition: avisynth_c.h:629
discard all
Definition: avcodec.h:688
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:271
static AVPacket pkt
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:160
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:683
MatroskaTrackAudio audio
Definition: matroskadec.c:184
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
uint64_t duration
Definition: matroskadec.c:323
const struct EbmlSyntax * n
Definition: matroskadec.c:93
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:224
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
#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:2324
#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:416
#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:3911
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:207
Format I/O context.
Definition: avformat.h:1314
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:227
UID uid
Definition: mxfenc.c:1820
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:1692
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:106
static const EbmlSyntax matroska_cluster[]
Definition: matroskadec.c:615
#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:190
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:3572
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
Definition: matroskadec.c:801
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1427
Public dictionary API.
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:189
static const EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:509
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1017
uint64_t pixel_height
Definition: matroskadec.c:138
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:324
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:140
MatroskaTrackOperation operation
Definition: matroskadec.c:185
MatroskaTrackVideo video
Definition: matroskadec.c:183
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:225
static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start)
Definition: matroskadec.c:3272
void * elem
Definition: matroskadec.c:99
AVOptions.
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:97
MatroskaTrackCompression compression
Definition: matroskadec.c:129
uint8_t * data
Definition: matroskadec.c:104
static int webm_dash_manifest_cues(AVFormatContext *s)
Definition: matroskadec.c:3508
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:71
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:698
#define AVPALETTE_SIZE
Definition: pixfmt.h:33
uint64_t time
Definition: matroskadec.c:219
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
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1485
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:117
#define TRACK_NUMBER
Definition: matroska.h:298
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1611
enum AVStreamParseType need_parsing
Definition: avformat.h:1069
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:196
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:175
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:223
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1647
static const EbmlSyntax matroska_segment[]
Definition: matroskadec.c:575
AVStream * stream
Definition: matroskadec.c:201
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3805
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
char * language
Definition: matroskadec.c:177
#define MATROSKA_ID_BLOCKMORE
Definition: matroska.h:193
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1382
#define MATROSKA_ID_CUERELATIVEPOSITION
Definition: matroska.h:161
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:129
static const EbmlSyntax matroska_segments[]
Definition: matroskadec.c:587
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:1425
uint8_t * data
Definition: avcodec.h:1467
uint64_t typevalue
Definition: matroskadec.c:233
uint64_t codec_delay
Definition: matroskadec.c:187
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3061
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord)
Definition: vf_neighbor.c:129
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:112
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:222
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:1348
static const EbmlSyntax matroska_index[]
Definition: matroskadec.c:529
int64_t start_time_ns
Definition: matroskadec.c:3262
#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:278
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:765
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:442
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:2917
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:182
#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:545
#define AV_DISPOSITION_CAPTIONS
To specify text track kind (different from subtitles default).
Definition: avformat.h:859
EbmlList sub
Definition: matroskadec.c:228
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, uint64_t pos)
Definition: matroskadec.c:1469
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1499
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3119
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:973
#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:142
uint64_t display_height
Definition: matroskadec.c:136
#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:86
#define AVINDEX_KEYFRAME
Definition: avformat.h:824
#define FILENAME
Definition: matroska.h:293
EbmlType type
Definition: matroskadec.c:86
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:101
#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:1528
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:200
int64_t end_offset
Definition: matroskadec.c:3265
#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:1877
static const uint16_t mask[17]
Definition: lzw.c:38
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:769
av_default_item_name
AVChapter * chapter
Definition: matroskadec.c:210
#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:818
#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:176
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:209
static const EbmlSyntax matroska_track_encoding[]
Definition: matroskadec.c:402
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num)
Definition: matroskadec.c:910
const char * r
Definition: vf_curves.c:107
uint64_t display_width
Definition: matroskadec.c:135
#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:2928
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
EbmlBin additional
Definition: matroskadec.c:328
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:420
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:172
enum AVCodecID id
Definition: matroska.h:274
#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:227
static const EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c:523
static const EbmlSyntax matroska_chapter_entry[]
Definition: matroskadec.c:488
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:960
uint64_t timecode
Definition: matroskadec.c:255
#define FFMAX(a, b)
Definition: common.h:94
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:80
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:1473
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2338
Only parse headers, do not repack.
Definition: avformat.h:808
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:536
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:896
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1144
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:111
int nb_elem
Definition: matroskadec.c:98
#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:226
static const EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:564
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:842
#define MATROSKA_ID_ENCODINGSIGHASHALGO
Definition: matroska.h:147
uint64_t skip_to_timecode
Definition: matroskadec.c:299
Definition: dct-test.c:51
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:2222
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1581
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:207
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1514
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:148
uint64_t start
Definition: matroskadec.c:205
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
char filename[1024]
input or output filename
Definition: avformat.h:1390
#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:129
#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:624
#define FFMIN(a, b)
Definition: common.h:96
#define MATROSKA_ID_TAGTARGETS
Definition: matroska.h:173
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
AVPacket ** packets
Definition: matroskadec.c:291
#define MATROSKA_VIDEO_STEREO_PLANE_COUNT
Definition: matroska.h:280
#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:1052
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:723
static const EbmlSyntax matroska_track_combine_planes[]
Definition: matroskadec.c:422
int width
picture width / height.
Definition: avcodec.h:1711
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:228
uint64_t id_length
Definition: matroskadec.c:111
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num)
Definition: matroskadec.c:1219
#define CLUSTER_KEYFRAME
Definition: matroska.h:296
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:167
uint64_t doctype_version
Definition: matroskadec.c:113
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
int64_t duration
Definition: movenc-test.c:63
#define MATROSKA_ID_TRACKMAXCACHE
Definition: matroska.h:103
#define DURATION
Definition: matroska.h:295
int data_offset
Definition: matroskadec.c:88
#define MATROSKA_ID_CHAPTERPHYSEQUIV
Definition: matroska.h:229
static int matroska_read_close(AVFormatContext *s)
Definition: matroskadec.c:3244
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
EbmlBin codec_priv
Definition: matroskadec.c:176
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
Definition: matroskadec.c:843
static const EbmlSyntax ebml_syntax[]
Definition: matroskadec.c:343
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1233
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:215
#define OFFSET(x)
Definition: matroskadec.c:3611
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
Definition: lzo.c:134
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2822
int n
Definition: avisynth_c.h:547
AVDictionary * metadata
Definition: avformat.h:951
static const EbmlSyntax matroska_chapter[]
Definition: matroskadec.c:500
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:1177
#define EBML_ID_VOID
Definition: matroska.h:45
#define src
Definition: vp9dsp.c:530
static void mkv_stereo_mode_display_mul(int stereo_mode, int *h_width, int *h_height)
Definition: matroskadec.c:1687
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1369
uint64_t max_block_additional_id
Definition: matroskadec.c:192
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:852
double f
Definition: matroskadec.c:91
#define MATROSKA_ID_TRACKMINCACHE
Definition: matroska.h:102
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
Definition: matroskadec.c:1621
static int matroska_parse_flac(AVFormatContext *s, MatroskaTrack *track, int *offset)
Definition: matroskadec.c:1632
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: matroskadec.c:3164
Stream structure.
Definition: avformat.h:877
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:2615
#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:2307
static const EbmlSyntax matroska_tags[]
Definition: matroskadec.c:559
EbmlList encodings
Definition: matroskadec.c:186
#define CUES_END
Definition: matroska.h:292
char * codec_id
Definition: matroskadec.c:175
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:830
static const EbmlSyntax matroska_track_operation[]
Definition: matroskadec.c:427
static const EbmlSyntax matroska_cluster_incremental[]
Definition: matroskadec.c:647
int64_t current_cluster_pos
Definition: matroskadec.c:309
#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:1738
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:860
int ff_get_qtpalette(int codec_id, AVIOContext *pb, uint32_t *palette)
Retrieve the palette (or "color table" in QuickTime terms), either from the video sample description...
Definition: qtpalette.c:31
#define MATROSKA_ID_TRACKFLAGFORCED
Definition: matroska.h:100
#define MATROSKA_ID_TAGS
Definition: matroska.h:59
enum AVMediaType codec_type
Definition: avcodec.h:1540
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom.c:275
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
Definition: matroskadec.c:888
enum AVCodecID codec_id
Definition: avcodec.h:1549
#define MATROSKA_ID_TAGDEFAULT
Definition: matroska.h:171
#define BANDWIDTH
Definition: matroska.h:294
#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:386
int sample_rate
samples per second
Definition: avcodec.h:2287
AVIOContext * pb
I/O context.
Definition: avformat.h:1356
static const EbmlSyntax matroska_track[]
Definition: matroskadec.c:432
#define MATROSKA_ID_ENCODINGCOMPALGO
Definition: matroska.h:139
#define MATROSKA_ID_BLOCK
Definition: matroska.h:199
#define MATROSKA_ID_INFO
Definition: matroska.h:56
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:545
#define MATROSKA_ID_TAGTARGETS_TRACKUID
Definition: matroska.h:176
static const EbmlSyntax ebml_header[]
Definition: matroskadec.c:332
#define CUE_TIMESTAMPS
Definition: matroska.h:297
#define MATROSKA_ID_TAGLANG
Definition: matroska.h:170
uint64_t pixel_width
Definition: matroskadec.c:137
#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:1564
static const AVClass webm_dash_class
Definition: matroskadec.c:3617
int64_t start_offset
Definition: matroskadec.c:3264
#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:2979
#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:1387
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1648
#define MATROSKA_ID_TRACKNAME
Definition: matroska.h:96
uint64_t start
Definition: matroskadec.c:250
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:1082
#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:220
uint64_t u
Definition: matroskadec.c:90
#define MATROSKA_ID_CHAPCOUNTRY
Definition: matroska.h:221
#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:598
#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 isnan(x)
Definition: libm.h:340
#define MATROSKA_ID_CUEDURATION
Definition: matroska.h:162
AVStream * stream
Definition: matroskadec.c:189
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, int *buf_size, int type, uint32_t **lace_buf, int *laces)
Definition: matroskadec.c:2429
#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:276
#define MATROSKA_ID_ENCODINGSIGALGO
Definition: matroska.h:146
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3149
Recommmends skipping the specified number of samples.
Definition: avcodec.h:1352
static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
Definition: matroskadec.c:1711
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:957
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:143
#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:267
#define MATROSKA_ID_TRACKVIDEO
Definition: matroska.h:81
int64_t discard_padding
Definition: matroskadec.c:329
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int size, int big_endian)
Definition: riffdec.c:88
int size
Definition: matroskadec.c:103
static const EbmlSyntax matroska_attachments[]
Definition: matroskadec.c:476
int error
contains the error code or 0 if no error happened
Definition: avio.h:192
static const EbmlSyntax matroska_clusters_incremental[]
Definition: matroskadec.c:656
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:940
int list_elem_size
Definition: matroskadec.c:87
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:633
mfxU16 profile
Definition: qsvenc.c:42
#define AVPALETTE_COUNT
Definition: pixfmt.h:34
#define MATROSKA_ID_VIDEOFRAMERATE
Definition: matroska.h:111
int64_t end_time_ns
Definition: matroskadec.c:3263
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:481
#define MATROSKA_ID_TRACKOPERATION
Definition: matroska.h:83
int64_t pos
Definition: matroskadec.c:105
static const EbmlSyntax matroska_blockmore[]
Definition: matroskadec.c:592
#define MATROSKA_ID_CHAPTERDISPLAY
Definition: matroska.h:218
static int flags
Definition: cpu.c:47
static const EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:378
MatroskaLevel1Element level1_elems[64]
Definition: matroskadec.c:305
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 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:807
int64_t reference
Definition: matroskadec.c:324
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
Main libavformat public API header.
uint64_t buf_timecode
Definition: matroskadec.c:157
#define MATROSKA_ID_ENCODINGENCAESSETTINGS
Definition: matroska.h:143