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matroskadec.c
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1 /*
2  * Matroska file demuxer
3  * Copyright (c) 2003-2008 The FFmpeg Project
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Matroska file demuxer
25  * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26  * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27  * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28  * @see specs available on the Matroska project page: http://www.matroska.org/
29  */
30 
31 #include "config.h"
32 
33 #include <inttypes.h>
34 #include <stdio.h>
35 
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
42 #include "libavutil/mathematics.h"
43 #include "libavutil/opt.h"
45 
46 #include "libavcodec/bytestream.h"
47 #include "libavcodec/flac.h"
48 #include "libavcodec/mpeg4audio.h"
49 
50 #include "avformat.h"
51 #include "avio_internal.h"
52 #include "internal.h"
53 #include "isom.h"
54 #include "matroska.h"
55 #include "oggdec.h"
56 /* For ff_codec_get_id(). */
57 #include "riff.h"
58 #include "rmsipr.h"
59 
60 #if CONFIG_BZLIB
61 #include <bzlib.h>
62 #endif
63 #if CONFIG_ZLIB
64 #include <zlib.h>
65 #endif
66 
67 typedef enum {
80 } EbmlType;
81 
82 typedef const struct EbmlSyntax {
83  uint32_t id;
87  union {
88  uint64_t u;
89  double f;
90  const char *s;
91  const struct EbmlSyntax *n;
92  } def;
93 } EbmlSyntax;
94 
95 typedef struct EbmlList {
96  int nb_elem;
97  void *elem;
98 } EbmlList;
99 
100 typedef struct EbmlBin {
101  int size;
103  int64_t pos;
104 } EbmlBin;
105 
106 typedef struct Ebml {
107  uint64_t version;
108  uint64_t max_size;
109  uint64_t id_length;
110  char *doctype;
111  uint64_t doctype_version;
112 } Ebml;
113 
114 typedef struct MatroskaTrackCompression {
115  uint64_t algo;
118 
119 typedef struct MatroskaTrackEncryption {
120  uint64_t algo;
123 
124 typedef struct MatroskaTrackEncoding {
125  uint64_t scope;
126  uint64_t type;
130 
131 typedef struct MatroskaTrackVideo {
132  double frame_rate;
133  uint64_t display_width;
134  uint64_t display_height;
135  uint64_t pixel_width;
136  uint64_t pixel_height;
138  uint64_t stereo_mode;
139  uint64_t alpha_mode;
141 
142 typedef struct MatroskaTrackAudio {
143  double samplerate;
145  uint64_t bitdepth;
146  uint64_t channels;
147 
148  /* real audio header (extracted from extradata) */
154  int pkt_cnt;
155  uint64_t buf_timecode;
158 
159 typedef struct MatroskaTrackPlane {
160  uint64_t uid;
161  uint64_t type;
163 
164 typedef struct MatroskaTrackOperation {
167 
168 typedef struct MatroskaTrack {
169  uint64_t num;
170  uint64_t uid;
171  uint64_t type;
172  char *name;
173  char *codec_id;
175  char *language;
176  double time_scale;
178  uint64_t flag_default;
179  uint64_t flag_forced;
180  uint64_t seek_preroll;
185  uint64_t codec_delay;
186 
188  int64_t end_timecode;
191 } MatroskaTrack;
192 
193 typedef struct MatroskaAttachment {
194  uint64_t uid;
195  char *filename;
196  char *mime;
198 
201 
202 typedef struct MatroskaChapter {
203  uint64_t start;
204  uint64_t end;
205  uint64_t uid;
206  char *title;
207 
210 
211 typedef struct MatroskaIndexPos {
212  uint64_t track;
213  uint64_t pos;
215 
216 typedef struct MatroskaIndex {
217  uint64_t time;
219 } MatroskaIndex;
220 
221 typedef struct MatroskaTag {
222  char *name;
223  char *string;
224  char *lang;
225  uint64_t def;
227 } MatroskaTag;
228 
229 typedef struct MatroskaTagTarget {
230  char *type;
231  uint64_t typevalue;
232  uint64_t trackuid;
233  uint64_t chapteruid;
234  uint64_t attachuid;
236 
237 typedef struct MatroskaTags {
240 } MatroskaTags;
241 
242 typedef struct MatroskaSeekhead {
243  uint64_t id;
244  uint64_t pos;
246 
247 typedef struct MatroskaLevel {
248  uint64_t start;
249  uint64_t length;
250 } MatroskaLevel;
251 
252 typedef struct MatroskaCluster {
253  uint64_t timecode;
256 
257 typedef struct MatroskaLevel1Element {
258  uint64_t id;
259  uint64_t pos;
260  int parsed;
262 
263 typedef struct MatroskaDemuxContext {
264  const AVClass *class;
266 
267  /* EBML stuff */
270  int level_up;
271  uint32_t current_id;
272 
273  uint64_t time_scale;
274  double duration;
275  char *title;
276  char *muxingapp;
284 
285  /* byte position of the segment inside the stream */
286  int64_t segment_start;
287 
288  /* the packet queue */
292 
293  int done;
294 
295  /* What to skip before effectively reading a packet. */
298 
299  /* File has a CUES element, but we defer parsing until it is needed. */
301 
302  /* Level1 elements and whether they were read yet */
305 
309 
310  /* File has SSA subtitles which prevent incremental cluster parsing. */
312 
313  /* WebM DASH Manifest live flag/ */
314  int is_live;
316 
317 typedef struct MatroskaBlock {
318  uint64_t duration;
319  int64_t reference;
320  uint64_t non_simple;
322  uint64_t additional_id;
325 } MatroskaBlock;
326 
327 static const EbmlSyntax ebml_header[] = {
328  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
329  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
330  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
331  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
332  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
335  { 0 }
336 };
337 
338 static const EbmlSyntax ebml_syntax[] = {
339  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
340  { 0 }
341 };
342 
343 static const EbmlSyntax matroska_info[] = {
344  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
346  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
348  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
349  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
351  { 0 }
352 };
353 
355  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
356  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
357  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
358  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
359  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
360  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
361  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
370  { 0 }
371 };
372 
374  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
375  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
377  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
378  { 0 }
379 };
380 
384  { 0 }
385 };
386 
395  { 0 }
396 };
398  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
399  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
400  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
401  { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
403  { 0 }
404 };
405 
407  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
408  { 0 }
409 };
410 
414  { 0 }
415 };
416 
418  { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
419  { 0 }
420 };
421 
423  { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
424  { 0 }
425 };
426 
427 static const EbmlSyntax matroska_track[] = {
428  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
430  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
433  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
434  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
435  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
436  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
437  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
438  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
439  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
440  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
441  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
442  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
443  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
444  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
445  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
454  { 0 }
455 };
456 
457 static const EbmlSyntax matroska_tracks[] = {
458  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
459  { 0 }
460 };
461 
462 static const EbmlSyntax matroska_attachment[] = {
464  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
465  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
466  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
468  { 0 }
469 };
470 
472  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
473  { 0 }
474 };
475 
477  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
479  { 0 }
480 };
481 
486  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
491  { 0 }
492 };
493 
494 static const EbmlSyntax matroska_chapter[] = {
495  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
500  { 0 }
501 };
502 
503 static const EbmlSyntax matroska_chapters[] = {
504  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
505  { 0 }
506 };
507 
508 static const EbmlSyntax matroska_index_pos[] = {
509  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
514  { 0 }
515 };
516 
518  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
519  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
520  { 0 }
521 };
522 
523 static const EbmlSyntax matroska_index[] = {
524  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
525  { 0 }
526 };
527 
528 static const EbmlSyntax matroska_simpletag[] = {
529  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
530  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
531  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
532  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
533  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
534  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
535  { 0 }
536 };
537 
538 static const EbmlSyntax matroska_tagtargets[] = {
540  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
541  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
542  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
543  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
544  { 0 }
545 };
546 
547 static const EbmlSyntax matroska_tag[] = {
548  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
549  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
550  { 0 }
551 };
552 
553 static const EbmlSyntax matroska_tags[] = {
554  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
555  { 0 }
556 };
557 
559  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
560  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
561  { 0 }
562 };
563 
564 static const EbmlSyntax matroska_seekhead[] = {
565  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
566  { 0 }
567 };
568 
569 static const EbmlSyntax matroska_segment[] = {
570  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
571  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
572  { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
573  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
574  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
575  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
576  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
578  { 0 }
579 };
580 
581 static const EbmlSyntax matroska_segments[] = {
582  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
583  { 0 }
584 };
585 
586 static const EbmlSyntax matroska_blockmore[] = {
587  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
588  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
589  { 0 }
590 };
591 
593  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
594  { 0 }
595 };
596 
597 static const EbmlSyntax matroska_blockgroup[] = {
598  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
599  { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
600  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
602  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
603  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
605  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
606  { 0 }
607 };
608 
609 static const EbmlSyntax matroska_cluster[] = {
610  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
611  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
612  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
615  { 0 }
616 };
617 
618 static const EbmlSyntax matroska_clusters[] = {
619  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
624  { 0 }
625 };
626 
628  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
629  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
630  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
638  { 0 }
639 };
640 
642  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
647  { 0 }
648 };
649 
651  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
656  { 0 }
657 };
658 
659 static const char *const matroska_doctypes[] = { "matroska", "webm" };
660 
661 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
662 {
663  AVIOContext *pb = matroska->ctx->pb;
664  uint32_t id;
665  matroska->current_id = 0;
666  matroska->num_levels = 0;
667 
668  /* seek to next position to resync from */
669  if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
670  goto eof;
671 
672  id = avio_rb32(pb);
673 
674  // try to find a toplevel element
675  while (!avio_feof(pb)) {
676  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
677  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
679  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
680  matroska->current_id = id;
681  return 0;
682  }
683  id = (id << 8) | avio_r8(pb);
684  }
685 
686 eof:
687  matroska->done = 1;
688  return AVERROR_EOF;
689 }
690 
691 /*
692  * Return: Whether we reached the end of a level in the hierarchy or not.
693  */
695 {
696  AVIOContext *pb = matroska->ctx->pb;
697  int64_t pos = avio_tell(pb);
698 
699  if (matroska->num_levels > 0) {
700  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
701  if (pos - level->start >= level->length || matroska->current_id) {
702  matroska->num_levels--;
703  return 1;
704  }
705  }
706  return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
707 }
708 
709 /*
710  * Read: an "EBML number", which is defined as a variable-length
711  * array of bytes. The first byte indicates the length by giving a
712  * number of 0-bits followed by a one. The position of the first
713  * "one" bit inside the first byte indicates the length of this
714  * number.
715  * Returns: number of bytes read, < 0 on error
716  */
718  int max_size, uint64_t *number)
719 {
720  int read = 1, n = 1;
721  uint64_t total = 0;
722 
723  /* The first byte tells us the length in bytes - avio_r8() can normally
724  * return 0, but since that's not a valid first ebmlID byte, we can
725  * use it safely here to catch EOS. */
726  if (!(total = avio_r8(pb))) {
727  /* we might encounter EOS here */
728  if (!avio_feof(pb)) {
729  int64_t pos = avio_tell(pb);
730  av_log(matroska->ctx, AV_LOG_ERROR,
731  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
732  pos, pos);
733  return pb->error ? pb->error : AVERROR(EIO);
734  }
735  return AVERROR_EOF;
736  }
737 
738  /* get the length of the EBML number */
739  read = 8 - ff_log2_tab[total];
740  if (read > max_size) {
741  int64_t pos = avio_tell(pb) - 1;
742  av_log(matroska->ctx, AV_LOG_ERROR,
743  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
744  (uint8_t) total, pos, pos);
745  return AVERROR_INVALIDDATA;
746  }
747 
748  /* read out length */
749  total ^= 1 << ff_log2_tab[total];
750  while (n++ < read)
751  total = (total << 8) | avio_r8(pb);
752 
753  *number = total;
754 
755  return read;
756 }
757 
758 /**
759  * Read a EBML length value.
760  * This needs special handling for the "unknown length" case which has multiple
761  * encodings.
762  */
764  uint64_t *number)
765 {
766  int res = ebml_read_num(matroska, pb, 8, number);
767  if (res > 0 && *number + 1 == 1ULL << (7 * res))
768  *number = 0xffffffffffffffULL;
769  return res;
770 }
771 
772 /*
773  * Read the next element as an unsigned int.
774  * 0 is success, < 0 is failure.
775  */
776 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
777 {
778  int n = 0;
779 
780  if (size > 8)
781  return AVERROR_INVALIDDATA;
782 
783  /* big-endian ordering; build up number */
784  *num = 0;
785  while (n++ < size)
786  *num = (*num << 8) | avio_r8(pb);
787 
788  return 0;
789 }
790 
791 /*
792  * Read the next element as a signed int.
793  * 0 is success, < 0 is failure.
794  */
795 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
796 {
797  int n = 1;
798 
799  if (size > 8)
800  return AVERROR_INVALIDDATA;
801 
802  if (size == 0) {
803  *num = 0;
804  } else {
805  *num = sign_extend(avio_r8(pb), 8);
806 
807  /* big-endian ordering; build up number */
808  while (n++ < size)
809  *num = (*num << 8) | avio_r8(pb);
810  }
811 
812  return 0;
813 }
814 
815 /*
816  * Read the next element as a float.
817  * 0 is success, < 0 is failure.
818  */
819 static int ebml_read_float(AVIOContext *pb, int size, double *num)
820 {
821  if (size == 0)
822  *num = 0;
823  else if (size == 4)
824  *num = av_int2float(avio_rb32(pb));
825  else if (size == 8)
826  *num = av_int2double(avio_rb64(pb));
827  else
828  return AVERROR_INVALIDDATA;
829 
830  return 0;
831 }
832 
833 /*
834  * Read the next element as an ASCII string.
835  * 0 is success, < 0 is failure.
836  */
837 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
838 {
839  char *res;
840 
841  /* EBML strings are usually not 0-terminated, so we allocate one
842  * byte more, read the string and NULL-terminate it ourselves. */
843  if (!(res = av_malloc(size + 1)))
844  return AVERROR(ENOMEM);
845  if (avio_read(pb, (uint8_t *) res, size) != size) {
846  av_free(res);
847  return AVERROR(EIO);
848  }
849  (res)[size] = '\0';
850  av_free(*str);
851  *str = res;
852 
853  return 0;
854 }
855 
856 /*
857  * Read the next element as binary data.
858  * 0 is success, < 0 is failure.
859  */
860 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
861 {
862  av_fast_padded_malloc(&bin->data, &bin->size, length);
863  if (!bin->data)
864  return AVERROR(ENOMEM);
865 
866  bin->size = length;
867  bin->pos = avio_tell(pb);
868  if (avio_read(pb, bin->data, length) != length) {
869  av_freep(&bin->data);
870  bin->size = 0;
871  return AVERROR(EIO);
872  }
873 
874  return 0;
875 }
876 
877 /*
878  * Read the next element, but only the header. The contents
879  * are supposed to be sub-elements which can be read separately.
880  * 0 is success, < 0 is failure.
881  */
882 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
883 {
884  AVIOContext *pb = matroska->ctx->pb;
886 
887  if (matroska->num_levels >= EBML_MAX_DEPTH) {
888  av_log(matroska->ctx, AV_LOG_ERROR,
889  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
890  return AVERROR(ENOSYS);
891  }
892 
893  level = &matroska->levels[matroska->num_levels++];
894  level->start = avio_tell(pb);
895  level->length = length;
896 
897  return 0;
898 }
899 
900 /*
901  * Read signed/unsigned "EBML" numbers.
902  * Return: number of bytes processed, < 0 on error
903  */
905  uint8_t *data, uint32_t size, uint64_t *num)
906 {
907  AVIOContext pb;
908  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
909  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
910 }
911 
912 /*
913  * Same as above, but signed.
914  */
916  uint8_t *data, uint32_t size, int64_t *num)
917 {
918  uint64_t unum;
919  int res;
920 
921  /* read as unsigned number first */
922  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
923  return res;
924 
925  /* make signed (weird way) */
926  *num = unum - ((1LL << (7 * res - 1)) - 1);
927 
928  return res;
929 }
930 
931 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
932  EbmlSyntax *syntax, void *data);
933 
934 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
935  uint32_t id, void *data)
936 {
937  int i;
938  for (i = 0; syntax[i].id; i++)
939  if (id == syntax[i].id)
940  break;
941  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
942  matroska->num_levels > 0 &&
943  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
944  return 0; // we reached the end of an unknown size cluster
945  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
946  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
947  }
948  return ebml_parse_elem(matroska, &syntax[i], data);
949 }
950 
951 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
952  void *data)
953 {
954  if (!matroska->current_id) {
955  uint64_t id;
956  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
957  if (res < 0) {
958  // in live mode, finish parsing if EOF is reached.
959  return (matroska->is_live && matroska->ctx->pb->eof_reached &&
960  res == AVERROR_EOF) ? 1 : res;
961  }
962  matroska->current_id = id | 1 << 7 * res;
963  }
964  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
965 }
966 
967 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
968  void *data)
969 {
970  int i, res = 0;
971 
972  for (i = 0; syntax[i].id; i++)
973  switch (syntax[i].type) {
974  case EBML_UINT:
975  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
976  break;
977  case EBML_FLOAT:
978  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
979  break;
980  case EBML_STR:
981  case EBML_UTF8:
982  // the default may be NULL
983  if (syntax[i].def.s) {
984  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
985  *dst = av_strdup(syntax[i].def.s);
986  if (!*dst)
987  return AVERROR(ENOMEM);
988  }
989  break;
990  }
991 
992  while (!res && !ebml_level_end(matroska))
993  res = ebml_parse(matroska, syntax, data);
994 
995  return res;
996 }
997 
998 /*
999  * Allocate and return the entry for the level1 element with the given ID. If
1000  * an entry already exists, return the existing entry.
1001  */
1003  uint32_t id)
1004 {
1005  int i;
1006  MatroskaLevel1Element *elem;
1007 
1008  // Some files link to all clusters; useless.
1009  if (id == MATROSKA_ID_CLUSTER)
1010  return NULL;
1011 
1012  // There can be multiple seekheads.
1013  if (id != MATROSKA_ID_SEEKHEAD) {
1014  for (i = 0; i < matroska->num_level1_elems; i++) {
1015  if (matroska->level1_elems[i].id == id)
1016  return &matroska->level1_elems[i];
1017  }
1018  }
1019 
1020  // Only a completely broken file would have more elements.
1021  // It also provides a low-effort way to escape from circular seekheads
1022  // (every iteration will add a level1 entry).
1023  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1024  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1025  return NULL;
1026  }
1027 
1028  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1029  *elem = (MatroskaLevel1Element){.id = id};
1030 
1031  return elem;
1032 }
1033 
1035  EbmlSyntax *syntax, void *data)
1036 {
1037  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1038  [EBML_UINT] = 8,
1039  [EBML_FLOAT] = 8,
1040  // max. 16 MB for strings
1041  [EBML_STR] = 0x1000000,
1042  [EBML_UTF8] = 0x1000000,
1043  // max. 256 MB for binary data
1044  [EBML_BIN] = 0x10000000,
1045  // no limits for anything else
1046  };
1047  AVIOContext *pb = matroska->ctx->pb;
1048  uint32_t id = syntax->id;
1049  uint64_t length;
1050  int res;
1051  void *newelem;
1052  MatroskaLevel1Element *level1_elem;
1053 
1054  data = (char *) data + syntax->data_offset;
1055  if (syntax->list_elem_size) {
1056  EbmlList *list = data;
1057  newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1058  if (!newelem)
1059  return AVERROR(ENOMEM);
1060  list->elem = newelem;
1061  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1062  memset(data, 0, syntax->list_elem_size);
1063  list->nb_elem++;
1064  }
1065 
1066  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1067  matroska->current_id = 0;
1068  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1069  return res;
1070  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1071  av_log(matroska->ctx, AV_LOG_ERROR,
1072  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1073  length, max_lengths[syntax->type], syntax->type);
1074  return AVERROR_INVALIDDATA;
1075  }
1076  }
1077 
1078  switch (syntax->type) {
1079  case EBML_UINT:
1080  res = ebml_read_uint(pb, length, data);
1081  break;
1082  case EBML_SINT:
1083  res = ebml_read_sint(pb, length, data);
1084  break;
1085  case EBML_FLOAT:
1086  res = ebml_read_float(pb, length, data);
1087  break;
1088  case EBML_STR:
1089  case EBML_UTF8:
1090  res = ebml_read_ascii(pb, length, data);
1091  break;
1092  case EBML_BIN:
1093  res = ebml_read_binary(pb, length, data);
1094  break;
1095  case EBML_LEVEL1:
1096  case EBML_NEST:
1097  if ((res = ebml_read_master(matroska, length)) < 0)
1098  return res;
1099  if (id == MATROSKA_ID_SEGMENT)
1100  matroska->segment_start = avio_tell(matroska->ctx->pb);
1101  if (id == MATROSKA_ID_CUES)
1102  matroska->cues_parsing_deferred = 0;
1103  if (syntax->type == EBML_LEVEL1 &&
1104  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1105  if (level1_elem->parsed)
1106  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1107  level1_elem->parsed = 1;
1108  }
1109  return ebml_parse_nest(matroska, syntax->def.n, data);
1110  case EBML_PASS:
1111  return ebml_parse_id(matroska, syntax->def.n, id, data);
1112  case EBML_STOP:
1113  return 1;
1114  default:
1115  if (ffio_limit(pb, length) != length)
1116  return AVERROR(EIO);
1117  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1118  }
1119  if (res == AVERROR_INVALIDDATA)
1120  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1121  else if (res == AVERROR(EIO))
1122  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1123  return res;
1124 }
1125 
1126 static void ebml_free(EbmlSyntax *syntax, void *data)
1127 {
1128  int i, j;
1129  for (i = 0; syntax[i].id; i++) {
1130  void *data_off = (char *) data + syntax[i].data_offset;
1131  switch (syntax[i].type) {
1132  case EBML_STR:
1133  case EBML_UTF8:
1134  av_freep(data_off);
1135  break;
1136  case EBML_BIN:
1137  av_freep(&((EbmlBin *) data_off)->data);
1138  break;
1139  case EBML_LEVEL1:
1140  case EBML_NEST:
1141  if (syntax[i].list_elem_size) {
1142  EbmlList *list = data_off;
1143  char *ptr = list->elem;
1144  for (j = 0; j < list->nb_elem;
1145  j++, ptr += syntax[i].list_elem_size)
1146  ebml_free(syntax[i].def.n, ptr);
1147  av_freep(&list->elem);
1148  } else
1149  ebml_free(syntax[i].def.n, data_off);
1150  default:
1151  break;
1152  }
1153  }
1154 }
1155 
1156 /*
1157  * Autodetecting...
1158  */
1160 {
1161  uint64_t total = 0;
1162  int len_mask = 0x80, size = 1, n = 1, i;
1163 
1164  /* EBML header? */
1165  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1166  return 0;
1167 
1168  /* length of header */
1169  total = p->buf[4];
1170  while (size <= 8 && !(total & len_mask)) {
1171  size++;
1172  len_mask >>= 1;
1173  }
1174  if (size > 8)
1175  return 0;
1176  total &= (len_mask - 1);
1177  while (n < size)
1178  total = (total << 8) | p->buf[4 + n++];
1179 
1180  /* Does the probe data contain the whole header? */
1181  if (p->buf_size < 4 + size + total)
1182  return 0;
1183 
1184  /* The header should contain a known document type. For now,
1185  * we don't parse the whole header but simply check for the
1186  * availability of that array of characters inside the header.
1187  * Not fully fool-proof, but good enough. */
1188  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1189  size_t probelen = strlen(matroska_doctypes[i]);
1190  if (total < probelen)
1191  continue;
1192  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1193  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1194  return AVPROBE_SCORE_MAX;
1195  }
1196 
1197  // probably valid EBML header but no recognized doctype
1198  return AVPROBE_SCORE_EXTENSION;
1199 }
1200 
1202  int num)
1203 {
1204  MatroskaTrack *tracks = matroska->tracks.elem;
1205  int i;
1206 
1207  for (i = 0; i < matroska->tracks.nb_elem; i++)
1208  if (tracks[i].num == num)
1209  return &tracks[i];
1210 
1211  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1212  return NULL;
1213 }
1214 
1215 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1216  MatroskaTrack *track)
1217 {
1218  MatroskaTrackEncoding *encodings = track->encodings.elem;
1219  uint8_t *data = *buf;
1220  int isize = *buf_size;
1221  uint8_t *pkt_data = NULL;
1222  uint8_t av_unused *newpktdata;
1223  int pkt_size = isize;
1224  int result = 0;
1225  int olen;
1226 
1227  if (pkt_size >= 10000000U)
1228  return AVERROR_INVALIDDATA;
1229 
1230  switch (encodings[0].compression.algo) {
1232  {
1233  int header_size = encodings[0].compression.settings.size;
1234  uint8_t *header = encodings[0].compression.settings.data;
1235 
1236  if (header_size && !header) {
1237  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1238  return -1;
1239  }
1240 
1241  if (!header_size)
1242  return 0;
1243 
1244  pkt_size = isize + header_size;
1245  pkt_data = av_malloc(pkt_size);
1246  if (!pkt_data)
1247  return AVERROR(ENOMEM);
1248 
1249  memcpy(pkt_data, header, header_size);
1250  memcpy(pkt_data + header_size, data, isize);
1251  break;
1252  }
1253 #if CONFIG_LZO
1255  do {
1256  olen = pkt_size *= 3;
1257  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1258  if (!newpktdata) {
1259  result = AVERROR(ENOMEM);
1260  goto failed;
1261  }
1262  pkt_data = newpktdata;
1263  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1264  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1265  if (result) {
1266  result = AVERROR_INVALIDDATA;
1267  goto failed;
1268  }
1269  pkt_size -= olen;
1270  break;
1271 #endif
1272 #if CONFIG_ZLIB
1274  {
1275  z_stream zstream = { 0 };
1276  if (inflateInit(&zstream) != Z_OK)
1277  return -1;
1278  zstream.next_in = data;
1279  zstream.avail_in = isize;
1280  do {
1281  pkt_size *= 3;
1282  newpktdata = av_realloc(pkt_data, pkt_size);
1283  if (!newpktdata) {
1284  inflateEnd(&zstream);
1285  result = AVERROR(ENOMEM);
1286  goto failed;
1287  }
1288  pkt_data = newpktdata;
1289  zstream.avail_out = pkt_size - zstream.total_out;
1290  zstream.next_out = pkt_data + zstream.total_out;
1291  result = inflate(&zstream, Z_NO_FLUSH);
1292  } while (result == Z_OK && pkt_size < 10000000);
1293  pkt_size = zstream.total_out;
1294  inflateEnd(&zstream);
1295  if (result != Z_STREAM_END) {
1296  if (result == Z_MEM_ERROR)
1297  result = AVERROR(ENOMEM);
1298  else
1299  result = AVERROR_INVALIDDATA;
1300  goto failed;
1301  }
1302  break;
1303  }
1304 #endif
1305 #if CONFIG_BZLIB
1307  {
1308  bz_stream bzstream = { 0 };
1309  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1310  return -1;
1311  bzstream.next_in = data;
1312  bzstream.avail_in = isize;
1313  do {
1314  pkt_size *= 3;
1315  newpktdata = av_realloc(pkt_data, pkt_size);
1316  if (!newpktdata) {
1317  BZ2_bzDecompressEnd(&bzstream);
1318  result = AVERROR(ENOMEM);
1319  goto failed;
1320  }
1321  pkt_data = newpktdata;
1322  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1323  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1324  result = BZ2_bzDecompress(&bzstream);
1325  } while (result == BZ_OK && pkt_size < 10000000);
1326  pkt_size = bzstream.total_out_lo32;
1327  BZ2_bzDecompressEnd(&bzstream);
1328  if (result != BZ_STREAM_END) {
1329  if (result == BZ_MEM_ERROR)
1330  result = AVERROR(ENOMEM);
1331  else
1332  result = AVERROR_INVALIDDATA;
1333  goto failed;
1334  }
1335  break;
1336  }
1337 #endif
1338  default:
1339  return AVERROR_INVALIDDATA;
1340  }
1341 
1342  *buf = pkt_data;
1343  *buf_size = pkt_size;
1344  return 0;
1345 
1346 failed:
1347  av_free(pkt_data);
1348  return result;
1349 }
1350 
1352  AVDictionary **metadata, char *prefix)
1353 {
1354  MatroskaTag *tags = list->elem;
1355  char key[1024];
1356  int i;
1357 
1358  for (i = 0; i < list->nb_elem; i++) {
1359  const char *lang = tags[i].lang &&
1360  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1361 
1362  if (!tags[i].name) {
1363  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1364  continue;
1365  }
1366  if (prefix)
1367  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1368  else
1369  av_strlcpy(key, tags[i].name, sizeof(key));
1370  if (tags[i].def || !lang) {
1371  av_dict_set(metadata, key, tags[i].string, 0);
1372  if (tags[i].sub.nb_elem)
1373  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1374  }
1375  if (lang) {
1376  av_strlcat(key, "-", sizeof(key));
1377  av_strlcat(key, lang, sizeof(key));
1378  av_dict_set(metadata, key, tags[i].string, 0);
1379  if (tags[i].sub.nb_elem)
1380  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1381  }
1382  }
1384 }
1385 
1387 {
1388  MatroskaDemuxContext *matroska = s->priv_data;
1389  MatroskaTags *tags = matroska->tags.elem;
1390  int i, j;
1391 
1392  for (i = 0; i < matroska->tags.nb_elem; i++) {
1393  if (tags[i].target.attachuid) {
1394  MatroskaAttachment *attachment = matroska->attachments.elem;
1395  for (j = 0; j < matroska->attachments.nb_elem; j++)
1396  if (attachment[j].uid == tags[i].target.attachuid &&
1397  attachment[j].stream)
1398  matroska_convert_tag(s, &tags[i].tag,
1399  &attachment[j].stream->metadata, NULL);
1400  } else if (tags[i].target.chapteruid) {
1401  MatroskaChapter *chapter = matroska->chapters.elem;
1402  for (j = 0; j < matroska->chapters.nb_elem; j++)
1403  if (chapter[j].uid == tags[i].target.chapteruid &&
1404  chapter[j].chapter)
1405  matroska_convert_tag(s, &tags[i].tag,
1406  &chapter[j].chapter->metadata, NULL);
1407  } else if (tags[i].target.trackuid) {
1408  MatroskaTrack *track = matroska->tracks.elem;
1409  for (j = 0; j < matroska->tracks.nb_elem; j++)
1410  if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1411  matroska_convert_tag(s, &tags[i].tag,
1412  &track[j].stream->metadata, NULL);
1413  } else {
1414  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1415  tags[i].target.type);
1416  }
1417  }
1418 }
1419 
1421  uint64_t pos)
1422 {
1423  uint32_t level_up = matroska->level_up;
1424  uint32_t saved_id = matroska->current_id;
1425  int64_t before_pos = avio_tell(matroska->ctx->pb);
1427  int64_t offset;
1428  int ret = 0;
1429 
1430  /* seek */
1431  offset = pos + matroska->segment_start;
1432  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1433  /* We don't want to lose our seekhead level, so we add
1434  * a dummy. This is a crude hack. */
1435  if (matroska->num_levels == EBML_MAX_DEPTH) {
1436  av_log(matroska->ctx, AV_LOG_INFO,
1437  "Max EBML element depth (%d) reached, "
1438  "cannot parse further.\n", EBML_MAX_DEPTH);
1439  ret = AVERROR_INVALIDDATA;
1440  } else {
1441  level.start = 0;
1442  level.length = (uint64_t) -1;
1443  matroska->levels[matroska->num_levels] = level;
1444  matroska->num_levels++;
1445  matroska->current_id = 0;
1446 
1447  ret = ebml_parse(matroska, matroska_segment, matroska);
1448 
1449  /* remove dummy level */
1450  while (matroska->num_levels) {
1451  uint64_t length = matroska->levels[--matroska->num_levels].length;
1452  if (length == (uint64_t) -1)
1453  break;
1454  }
1455  }
1456  }
1457  /* seek back */
1458  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1459  matroska->level_up = level_up;
1460  matroska->current_id = saved_id;
1461 
1462  return ret;
1463 }
1464 
1466 {
1467  EbmlList *seekhead_list = &matroska->seekhead;
1468  int i;
1469 
1470  // we should not do any seeking in the streaming case
1471  if (!matroska->ctx->pb->seekable)
1472  return;
1473 
1474  for (i = 0; i < seekhead_list->nb_elem; i++) {
1475  MatroskaSeekhead *seekheads = seekhead_list->elem;
1476  uint32_t id = seekheads[i].id;
1477  uint64_t pos = seekheads[i].pos;
1478 
1479  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1480  if (!elem || elem->parsed)
1481  continue;
1482 
1483  elem->pos = pos;
1484 
1485  // defer cues parsing until we actually need cue data.
1486  if (id == MATROSKA_ID_CUES)
1487  continue;
1488 
1489  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1490  // mark index as broken
1491  matroska->cues_parsing_deferred = -1;
1492  break;
1493  }
1494 
1495  elem->parsed = 1;
1496  }
1497 }
1498 
1500 {
1501  EbmlList *index_list;
1503  uint64_t index_scale = 1;
1504  int i, j;
1505 
1506  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1507  return;
1508 
1509  index_list = &matroska->index;
1510  index = index_list->elem;
1511  if (index_list->nb_elem &&
1512  index[0].time > 1E14 / matroska->time_scale) {
1513  av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1514  index_scale = matroska->time_scale;
1515  }
1516  for (i = 0; i < index_list->nb_elem; i++) {
1517  EbmlList *pos_list = &index[i].pos;
1518  MatroskaIndexPos *pos = pos_list->elem;
1519  for (j = 0; j < pos_list->nb_elem; j++) {
1520  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1521  pos[j].track);
1522  if (track && track->stream)
1523  av_add_index_entry(track->stream,
1524  pos[j].pos + matroska->segment_start,
1525  index[i].time / index_scale, 0, 0,
1527  }
1528  }
1529 }
1530 
1532  int i;
1533 
1534  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1535  return;
1536 
1537  for (i = 0; i < matroska->num_level1_elems; i++) {
1538  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1539  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1540  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1541  matroska->cues_parsing_deferred = -1;
1542  elem->parsed = 1;
1543  break;
1544  }
1545  }
1546 
1547  matroska_add_index_entries(matroska);
1548 }
1549 
1551 {
1552  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1553  int profile;
1554 
1555  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1556  if (strstr(codec_id, aac_profiles[profile]))
1557  break;
1558  return profile + 1;
1559 }
1560 
1561 static int matroska_aac_sri(int samplerate)
1562 {
1563  int sri;
1564 
1565  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1566  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1567  break;
1568  return sri;
1569 }
1570 
1571 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1572 {
1573  char buffer[32];
1574  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1575  time_t creation_time = date_utc / 1000000000 + 978307200;
1576  struct tm tmpbuf, *ptm = gmtime_r(&creation_time, &tmpbuf);
1577  if (!ptm) return;
1578  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1579  av_dict_set(metadata, "creation_time", buffer, 0);
1580 }
1581 
1583  MatroskaTrack *track,
1584  int *offset)
1585 {
1586  AVStream *st = track->stream;
1587  uint8_t *p = track->codec_priv.data;
1588  int size = track->codec_priv.size;
1589 
1590  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1591  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1592  track->codec_priv.size = 0;
1593  return 0;
1594  }
1595  *offset = 8;
1596  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1597 
1598  p += track->codec_priv.size;
1599  size -= track->codec_priv.size;
1600 
1601  /* parse the remaining metadata blocks if present */
1602  while (size >= 4) {
1603  int block_last, block_type, block_size;
1604 
1605  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1606 
1607  p += 4;
1608  size -= 4;
1609  if (block_size > size)
1610  return 0;
1611 
1612  /* check for the channel mask */
1613  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1614  AVDictionary *dict = NULL;
1615  AVDictionaryEntry *chmask;
1616 
1617  ff_vorbis_comment(s, &dict, p, block_size, 0);
1618  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1619  if (chmask) {
1620  uint64_t mask = strtol(chmask->value, NULL, 0);
1621  if (!mask || mask & ~0x3ffffULL) {
1623  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1624  } else
1625  st->codec->channel_layout = mask;
1626  }
1627  av_dict_free(&dict);
1628  }
1629 
1630  p += block_size;
1631  size -= block_size;
1632  }
1633 
1634  return 0;
1635 }
1636 
1638 {
1639  MatroskaDemuxContext *matroska = s->priv_data;
1640  MatroskaTrack *tracks = matroska->tracks.elem;
1641  AVStream *st;
1642  int i, j, ret;
1643  int k;
1644 
1645  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1646  MatroskaTrack *track = &tracks[i];
1648  EbmlList *encodings_list = &track->encodings;
1649  MatroskaTrackEncoding *encodings = encodings_list->elem;
1650  uint8_t *extradata = NULL;
1651  int extradata_size = 0;
1652  int extradata_offset = 0;
1653  uint32_t fourcc = 0;
1654  AVIOContext b;
1655  char* key_id_base64 = NULL;
1656  int bit_depth = -1;
1657 
1658  /* Apply some sanity checks. */
1659  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1660  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1661  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1662  track->type != MATROSKA_TRACK_TYPE_METADATA) {
1663  av_log(matroska->ctx, AV_LOG_INFO,
1664  "Unknown or unsupported track type %"PRIu64"\n",
1665  track->type);
1666  continue;
1667  }
1668  if (!track->codec_id)
1669  continue;
1670 
1671  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1672  if (!track->default_duration && track->video.frame_rate > 0)
1673  track->default_duration = 1000000000 / track->video.frame_rate;
1674  if (track->video.display_width == -1)
1675  track->video.display_width = track->video.pixel_width;
1676  if (track->video.display_height == -1)
1677  track->video.display_height = track->video.pixel_height;
1678  if (track->video.color_space.size == 4)
1679  fourcc = AV_RL32(track->video.color_space.data);
1680  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1681  if (!track->audio.out_samplerate)
1682  track->audio.out_samplerate = track->audio.samplerate;
1683  }
1684  if (encodings_list->nb_elem > 1) {
1685  av_log(matroska->ctx, AV_LOG_ERROR,
1686  "Multiple combined encodings not supported");
1687  } else if (encodings_list->nb_elem == 1) {
1688  if (encodings[0].type) {
1689  if (encodings[0].encryption.key_id.size > 0) {
1690  /* Save the encryption key id to be stored later as a
1691  metadata tag. */
1692  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1693  key_id_base64 = av_malloc(b64_size);
1694  if (key_id_base64 == NULL)
1695  return AVERROR(ENOMEM);
1696 
1697  av_base64_encode(key_id_base64, b64_size,
1698  encodings[0].encryption.key_id.data,
1699  encodings[0].encryption.key_id.size);
1700  } else {
1701  encodings[0].scope = 0;
1702  av_log(matroska->ctx, AV_LOG_ERROR,
1703  "Unsupported encoding type");
1704  }
1705  } else if (
1706 #if CONFIG_ZLIB
1707  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1708 #endif
1709 #if CONFIG_BZLIB
1711 #endif
1712 #if CONFIG_LZO
1714 #endif
1716  encodings[0].scope = 0;
1717  av_log(matroska->ctx, AV_LOG_ERROR,
1718  "Unsupported encoding type");
1719  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1720  uint8_t *codec_priv = track->codec_priv.data;
1721  int ret = matroska_decode_buffer(&track->codec_priv.data,
1722  &track->codec_priv.size,
1723  track);
1724  if (ret < 0) {
1725  track->codec_priv.data = NULL;
1726  track->codec_priv.size = 0;
1727  av_log(matroska->ctx, AV_LOG_ERROR,
1728  "Failed to decode codec private data\n");
1729  }
1730 
1731  if (codec_priv != track->codec_priv.data)
1732  av_free(codec_priv);
1733  }
1734  }
1735 
1736  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1737  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1738  strlen(ff_mkv_codec_tags[j].str))) {
1739  codec_id = ff_mkv_codec_tags[j].id;
1740  break;
1741  }
1742  }
1743 
1744  st = track->stream = avformat_new_stream(s, NULL);
1745  if (!st) {
1746  av_free(key_id_base64);
1747  return AVERROR(ENOMEM);
1748  }
1749 
1750  if (key_id_base64) {
1751  /* export encryption key id as base64 metadata tag */
1752  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
1753  av_freep(&key_id_base64);
1754  }
1755 
1756  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1757  track->codec_priv.size >= 40 &&
1758  track->codec_priv.data) {
1759  track->ms_compat = 1;
1760  bit_depth = AV_RL16(track->codec_priv.data + 14);
1761  fourcc = AV_RL32(track->codec_priv.data + 16);
1763  fourcc);
1764  if (!codec_id)
1766  fourcc);
1767  extradata_offset = 40;
1768  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1769  track->codec_priv.size >= 14 &&
1770  track->codec_priv.data) {
1771  int ret;
1772  ffio_init_context(&b, track->codec_priv.data,
1773  track->codec_priv.size,
1774  0, NULL, NULL, NULL, NULL);
1775  ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size, 0);
1776  if (ret < 0)
1777  return ret;
1778  codec_id = st->codec->codec_id;
1779  extradata_offset = FFMIN(track->codec_priv.size, 18);
1780  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
1781  && (track->codec_priv.size >= 86)
1782  && (track->codec_priv.data)) {
1783  fourcc = AV_RL32(track->codec_priv.data + 4);
1784  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1786  fourcc = AV_RL32(track->codec_priv.data);
1787  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1788  }
1789  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1790  (track->codec_priv.size >= 21) &&
1791  (track->codec_priv.data)) {
1792  fourcc = AV_RL32(track->codec_priv.data + 4);
1793  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1795  fourcc = AV_RL32(track->codec_priv.data);
1796  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1797  }
1798  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI "))
1799  codec_id = AV_CODEC_ID_SVQ3;
1800  if (codec_id == AV_CODEC_ID_NONE) {
1801  char buf[32];
1802  av_get_codec_tag_string(buf, sizeof(buf), fourcc);
1803  av_log(matroska->ctx, AV_LOG_ERROR,
1804  "mov FourCC not found %s.\n", buf);
1805  }
1806  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1807  switch (track->audio.bitdepth) {
1808  case 8:
1809  codec_id = AV_CODEC_ID_PCM_U8;
1810  break;
1811  case 24:
1812  codec_id = AV_CODEC_ID_PCM_S24BE;
1813  break;
1814  case 32:
1815  codec_id = AV_CODEC_ID_PCM_S32BE;
1816  break;
1817  }
1818  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1819  switch (track->audio.bitdepth) {
1820  case 8:
1821  codec_id = AV_CODEC_ID_PCM_U8;
1822  break;
1823  case 24:
1824  codec_id = AV_CODEC_ID_PCM_S24LE;
1825  break;
1826  case 32:
1827  codec_id = AV_CODEC_ID_PCM_S32LE;
1828  break;
1829  }
1830  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1831  track->audio.bitdepth == 64) {
1832  codec_id = AV_CODEC_ID_PCM_F64LE;
1833  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1834  int profile = matroska_aac_profile(track->codec_id);
1835  int sri = matroska_aac_sri(track->audio.samplerate);
1836  extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1837  if (!extradata)
1838  return AVERROR(ENOMEM);
1839  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1840  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1841  if (strstr(track->codec_id, "SBR")) {
1842  sri = matroska_aac_sri(track->audio.out_samplerate);
1843  extradata[2] = 0x56;
1844  extradata[3] = 0xE5;
1845  extradata[4] = 0x80 | (sri << 3);
1846  extradata_size = 5;
1847  } else
1848  extradata_size = 2;
1849  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - FF_INPUT_BUFFER_PADDING_SIZE) {
1850  /* Only ALAC's magic cookie is stored in Matroska's track headers.
1851  * Create the "atom size", "tag", and "tag version" fields the
1852  * decoder expects manually. */
1853  extradata_size = 12 + track->codec_priv.size;
1854  extradata = av_mallocz(extradata_size +
1856  if (!extradata)
1857  return AVERROR(ENOMEM);
1858  AV_WB32(extradata, extradata_size);
1859  memcpy(&extradata[4], "alac", 4);
1860  AV_WB32(&extradata[8], 0);
1861  memcpy(&extradata[12], track->codec_priv.data,
1862  track->codec_priv.size);
1863  } else if (codec_id == AV_CODEC_ID_TTA) {
1864  extradata_size = 30;
1865  extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1866  if (!extradata)
1867  return AVERROR(ENOMEM);
1868  ffio_init_context(&b, extradata, extradata_size, 1,
1869  NULL, NULL, NULL, NULL);
1870  avio_write(&b, "TTA1", 4);
1871  avio_wl16(&b, 1);
1872  avio_wl16(&b, track->audio.channels);
1873  avio_wl16(&b, track->audio.bitdepth);
1874  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
1875  return AVERROR_INVALIDDATA;
1876  avio_wl32(&b, track->audio.out_samplerate);
1877  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
1878  track->audio.out_samplerate,
1879  AV_TIME_BASE * 1000));
1880  } else if (codec_id == AV_CODEC_ID_RV10 ||
1881  codec_id == AV_CODEC_ID_RV20 ||
1882  codec_id == AV_CODEC_ID_RV30 ||
1883  codec_id == AV_CODEC_ID_RV40) {
1884  extradata_offset = 26;
1885  } else if (codec_id == AV_CODEC_ID_RA_144) {
1886  track->audio.out_samplerate = 8000;
1887  track->audio.channels = 1;
1888  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
1889  codec_id == AV_CODEC_ID_COOK ||
1890  codec_id == AV_CODEC_ID_ATRAC3 ||
1891  codec_id == AV_CODEC_ID_SIPR)
1892  && track->codec_priv.data) {
1893  int flavor;
1894 
1895  ffio_init_context(&b, track->codec_priv.data,
1896  track->codec_priv.size,
1897  0, NULL, NULL, NULL, NULL);
1898  avio_skip(&b, 22);
1899  flavor = avio_rb16(&b);
1900  track->audio.coded_framesize = avio_rb32(&b);
1901  avio_skip(&b, 12);
1902  track->audio.sub_packet_h = avio_rb16(&b);
1903  track->audio.frame_size = avio_rb16(&b);
1904  track->audio.sub_packet_size = avio_rb16(&b);
1905  if (flavor < 0 ||
1906  track->audio.coded_framesize <= 0 ||
1907  track->audio.sub_packet_h <= 0 ||
1908  track->audio.frame_size <= 0 ||
1909  track->audio.sub_packet_size <= 0)
1910  return AVERROR_INVALIDDATA;
1911  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
1912  track->audio.frame_size);
1913  if (!track->audio.buf)
1914  return AVERROR(ENOMEM);
1915  if (codec_id == AV_CODEC_ID_RA_288) {
1916  st->codec->block_align = track->audio.coded_framesize;
1917  track->codec_priv.size = 0;
1918  } else {
1919  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1920  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1921  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1922  st->codec->bit_rate = sipr_bit_rate[flavor];
1923  }
1924  st->codec->block_align = track->audio.sub_packet_size;
1925  extradata_offset = 78;
1926  }
1927  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1928  ret = matroska_parse_flac(s, track, &extradata_offset);
1929  if (ret < 0)
1930  return ret;
1931  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
1932  fourcc = AV_RL32(track->codec_priv.data);
1933  }
1934  track->codec_priv.size -= extradata_offset;
1935 
1936  if (codec_id == AV_CODEC_ID_NONE)
1937  av_log(matroska->ctx, AV_LOG_INFO,
1938  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1939 
1940  if (track->time_scale < 0.01)
1941  track->time_scale = 1.0;
1942  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1943  1000 * 1000 * 1000); /* 64 bit pts in ns */
1944 
1945  /* convert the delay from ns to the track timebase */
1946  track->codec_delay = av_rescale_q(track->codec_delay,
1947  (AVRational){ 1, 1000000000 },
1948  st->time_base);
1949 
1950  st->codec->codec_id = codec_id;
1951 
1952  if (strcmp(track->language, "und"))
1953  av_dict_set(&st->metadata, "language", track->language, 0);
1954  av_dict_set(&st->metadata, "title", track->name, 0);
1955 
1956  if (track->flag_default)
1958  if (track->flag_forced)
1960 
1961  if (!st->codec->extradata) {
1962  if (extradata) {
1963  st->codec->extradata = extradata;
1964  st->codec->extradata_size = extradata_size;
1965  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1966  if (ff_alloc_extradata(st->codec, track->codec_priv.size))
1967  return AVERROR(ENOMEM);
1968  memcpy(st->codec->extradata,
1969  track->codec_priv.data + extradata_offset,
1970  track->codec_priv.size);
1971  }
1972  }
1973 
1974  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1975  MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
1976 
1978  st->codec->codec_tag = fourcc;
1979  if (bit_depth >= 0)
1980  st->codec->bits_per_coded_sample = bit_depth;
1981  st->codec->width = track->video.pixel_width;
1982  st->codec->height = track->video.pixel_height;
1984  &st->sample_aspect_ratio.den,
1985  st->codec->height * track->video.display_width,
1986  st->codec->width * track->video.display_height,
1987  255);
1988  if (st->codec->codec_id != AV_CODEC_ID_HEVC)
1990 
1991  if (track->default_duration) {
1993  1000000000, track->default_duration, 30000);
1994 #if FF_API_R_FRAME_RATE
1995  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
1996  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
1997  st->r_frame_rate = st->avg_frame_rate;
1998 #endif
1999  }
2000 
2001  /* export stereo mode flag as metadata tag */
2002  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2003  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2004 
2005  /* export alpha mode flag as metadata tag */
2006  if (track->video.alpha_mode)
2007  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2008 
2009  /* if we have virtual track, mark the real tracks */
2010  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2011  char buf[32];
2012  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2013  continue;
2014  snprintf(buf, sizeof(buf), "%s_%d",
2015  ff_matroska_video_stereo_plane[planes[j].type], i);
2016  for (k=0; k < matroska->tracks.nb_elem; k++)
2017  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2018  av_dict_set(&tracks[k].stream->metadata,
2019  "stereo_mode", buf, 0);
2020  break;
2021  }
2022  }
2023  // add stream level stereo3d side data if it is a supported format
2024  if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2025  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2026  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2027  if (ret < 0)
2028  return ret;
2029  }
2030  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2032  st->codec->sample_rate = track->audio.out_samplerate;
2033  st->codec->channels = track->audio.channels;
2034  if (!st->codec->bits_per_coded_sample)
2035  st->codec->bits_per_coded_sample = track->audio.bitdepth;
2036  if (st->codec->codec_id != AV_CODEC_ID_AAC)
2038  if (track->codec_delay > 0) {
2039  st->codec->delay = av_rescale_q(track->codec_delay,
2040  st->time_base,
2041  (AVRational){1, st->codec->sample_rate});
2042  }
2043  if (track->seek_preroll > 0) {
2045  av_rescale_q(track->seek_preroll,
2046  (AVRational){1, 1000000000},
2047  (AVRational){1, st->codec->sample_rate}));
2048  }
2049  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2050  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2051 
2052  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2053  st->disposition |= AV_DISPOSITION_CAPTIONS;
2054  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2055  st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2056  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2057  st->disposition |= AV_DISPOSITION_METADATA;
2058  }
2059  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2060  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2061  if (st->codec->codec_id == AV_CODEC_ID_ASS)
2062  matroska->contains_ssa = 1;
2063  }
2064  }
2065 
2066  return 0;
2067 }
2068 
2070 {
2071  MatroskaDemuxContext *matroska = s->priv_data;
2072  EbmlList *attachments_list = &matroska->attachments;
2073  EbmlList *chapters_list = &matroska->chapters;
2074  MatroskaAttachment *attachments;
2075  MatroskaChapter *chapters;
2076  uint64_t max_start = 0;
2077  int64_t pos;
2078  Ebml ebml = { 0 };
2079  int i, j, res;
2080 
2081  matroska->ctx = s;
2082  matroska->cues_parsing_deferred = 1;
2083 
2084  /* First read the EBML header. */
2085  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2086  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2087  ebml_free(ebml_syntax, &ebml);
2088  return AVERROR_INVALIDDATA;
2089  }
2090  if (ebml.version > EBML_VERSION ||
2091  ebml.max_size > sizeof(uint64_t) ||
2092  ebml.id_length > sizeof(uint32_t) ||
2093  ebml.doctype_version > 3) {
2094  av_log(matroska->ctx, AV_LOG_ERROR,
2095  "EBML header using unsupported features\n"
2096  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2097  ebml.version, ebml.doctype, ebml.doctype_version);
2098  ebml_free(ebml_syntax, &ebml);
2099  return AVERROR_PATCHWELCOME;
2100  } else if (ebml.doctype_version == 3) {
2101  av_log(matroska->ctx, AV_LOG_WARNING,
2102  "EBML header using unsupported features\n"
2103  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2104  ebml.version, ebml.doctype, ebml.doctype_version);
2105  }
2106  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2107  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2108  break;
2109  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2110  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2111  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2112  ebml_free(ebml_syntax, &ebml);
2113  return AVERROR_INVALIDDATA;
2114  }
2115  }
2116  ebml_free(ebml_syntax, &ebml);
2117 
2118  /* The next thing is a segment. */
2119  pos = avio_tell(matroska->ctx->pb);
2120  res = ebml_parse(matroska, matroska_segments, matroska);
2121  // try resyncing until we find a EBML_STOP type element.
2122  while (res != 1) {
2123  res = matroska_resync(matroska, pos);
2124  if (res < 0)
2125  return res;
2126  pos = avio_tell(matroska->ctx->pb);
2127  res = ebml_parse(matroska, matroska_segment, matroska);
2128  }
2129  matroska_execute_seekhead(matroska);
2130 
2131  if (!matroska->time_scale)
2132  matroska->time_scale = 1000000;
2133  if (matroska->duration)
2134  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2135  1000 / AV_TIME_BASE;
2136  av_dict_set(&s->metadata, "title", matroska->title, 0);
2137  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2138 
2139  if (matroska->date_utc.size == 8)
2141 
2142  res = matroska_parse_tracks(s);
2143  if (res < 0)
2144  return res;
2145 
2146  attachments = attachments_list->elem;
2147  for (j = 0; j < attachments_list->nb_elem; j++) {
2148  if (!(attachments[j].filename && attachments[j].mime &&
2149  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2150  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2151  } else {
2152  AVStream *st = avformat_new_stream(s, NULL);
2153  if (!st)
2154  break;
2155  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2156  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2158 
2159  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2160  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2161  strlen(ff_mkv_image_mime_tags[i].str))) {
2163  break;
2164  }
2165  }
2166 
2167  attachments[j].stream = st;
2168 
2169  if (st->codec->codec_id != AV_CODEC_ID_NONE) {
2172 
2174  if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2175  return res;
2176  memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2177  st->attached_pic.stream_index = st->index;
2179  } else {
2181  if (ff_alloc_extradata(st->codec, attachments[j].bin.size))
2182  break;
2183  memcpy(st->codec->extradata, attachments[j].bin.data,
2184  attachments[j].bin.size);
2185 
2186  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2187  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2188  strlen(ff_mkv_mime_tags[i].str))) {
2189  st->codec->codec_id = ff_mkv_mime_tags[i].id;
2190  break;
2191  }
2192  }
2193  }
2194  }
2195  }
2196 
2197  chapters = chapters_list->elem;
2198  for (i = 0; i < chapters_list->nb_elem; i++)
2199  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2200  (max_start == 0 || chapters[i].start > max_start)) {
2201  chapters[i].chapter =
2202  avpriv_new_chapter(s, chapters[i].uid,
2203  (AVRational) { 1, 1000000000 },
2204  chapters[i].start, chapters[i].end,
2205  chapters[i].title);
2206  if (chapters[i].chapter) {
2207  av_dict_set(&chapters[i].chapter->metadata,
2208  "title", chapters[i].title, 0);
2209  }
2210  max_start = chapters[i].start;
2211  }
2212 
2213  matroska_add_index_entries(matroska);
2214 
2216 
2217  return 0;
2218 }
2219 
2220 /*
2221  * Put one packet in an application-supplied AVPacket struct.
2222  * Returns 0 on success or -1 on failure.
2223  */
2225  AVPacket *pkt)
2226 {
2227  if (matroska->num_packets > 0) {
2228  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2229  av_freep(&matroska->packets[0]);
2230  if (matroska->num_packets > 1) {
2231  void *newpackets;
2232  memmove(&matroska->packets[0], &matroska->packets[1],
2233  (matroska->num_packets - 1) * sizeof(AVPacket *));
2234  newpackets = av_realloc(matroska->packets,
2235  (matroska->num_packets - 1) *
2236  sizeof(AVPacket *));
2237  if (newpackets)
2238  matroska->packets = newpackets;
2239  } else {
2240  av_freep(&matroska->packets);
2241  matroska->prev_pkt = NULL;
2242  }
2243  matroska->num_packets--;
2244  return 0;
2245  }
2246 
2247  return -1;
2248 }
2249 
2250 /*
2251  * Free all packets in our internal queue.
2252  */
2254 {
2255  matroska->prev_pkt = NULL;
2256  if (matroska->packets) {
2257  int n;
2258  for (n = 0; n < matroska->num_packets; n++) {
2259  av_free_packet(matroska->packets[n]);
2260  av_freep(&matroska->packets[n]);
2261  }
2262  av_freep(&matroska->packets);
2263  matroska->num_packets = 0;
2264  }
2265 }
2266 
2268  int *buf_size, int type,
2269  uint32_t **lace_buf, int *laces)
2270 {
2271  int res = 0, n, size = *buf_size;
2272  uint8_t *data = *buf;
2273  uint32_t *lace_size;
2274 
2275  if (!type) {
2276  *laces = 1;
2277  *lace_buf = av_mallocz(sizeof(int));
2278  if (!*lace_buf)
2279  return AVERROR(ENOMEM);
2280 
2281  *lace_buf[0] = size;
2282  return 0;
2283  }
2284 
2285  av_assert0(size > 0);
2286  *laces = *data + 1;
2287  data += 1;
2288  size -= 1;
2289  lace_size = av_mallocz(*laces * sizeof(int));
2290  if (!lace_size)
2291  return AVERROR(ENOMEM);
2292 
2293  switch (type) {
2294  case 0x1: /* Xiph lacing */
2295  {
2296  uint8_t temp;
2297  uint32_t total = 0;
2298  for (n = 0; res == 0 && n < *laces - 1; n++) {
2299  while (1) {
2300  if (size <= total) {
2301  res = AVERROR_INVALIDDATA;
2302  break;
2303  }
2304  temp = *data;
2305  total += temp;
2306  lace_size[n] += temp;
2307  data += 1;
2308  size -= 1;
2309  if (temp != 0xff)
2310  break;
2311  }
2312  }
2313  if (size <= total) {
2314  res = AVERROR_INVALIDDATA;
2315  break;
2316  }
2317 
2318  lace_size[n] = size - total;
2319  break;
2320  }
2321 
2322  case 0x2: /* fixed-size lacing */
2323  if (size % (*laces)) {
2324  res = AVERROR_INVALIDDATA;
2325  break;
2326  }
2327  for (n = 0; n < *laces; n++)
2328  lace_size[n] = size / *laces;
2329  break;
2330 
2331  case 0x3: /* EBML lacing */
2332  {
2333  uint64_t num;
2334  uint64_t total;
2335  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2336  if (n < 0 || num > INT_MAX) {
2337  av_log(matroska->ctx, AV_LOG_INFO,
2338  "EBML block data error\n");
2339  res = n<0 ? n : AVERROR_INVALIDDATA;
2340  break;
2341  }
2342  data += n;
2343  size -= n;
2344  total = lace_size[0] = num;
2345  for (n = 1; res == 0 && n < *laces - 1; n++) {
2346  int64_t snum;
2347  int r;
2348  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2349  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2350  av_log(matroska->ctx, AV_LOG_INFO,
2351  "EBML block data error\n");
2352  res = r<0 ? r : AVERROR_INVALIDDATA;
2353  break;
2354  }
2355  data += r;
2356  size -= r;
2357  lace_size[n] = lace_size[n - 1] + snum;
2358  total += lace_size[n];
2359  }
2360  if (size <= total) {
2361  res = AVERROR_INVALIDDATA;
2362  break;
2363  }
2364  lace_size[*laces - 1] = size - total;
2365  break;
2366  }
2367  }
2368 
2369  *buf = data;
2370  *lace_buf = lace_size;
2371  *buf_size = size;
2372 
2373  return res;
2374 }
2375 
2377  MatroskaTrack *track, AVStream *st,
2378  uint8_t *data, int size, uint64_t timecode,
2379  int64_t pos)
2380 {
2381  int a = st->codec->block_align;
2382  int sps = track->audio.sub_packet_size;
2383  int cfs = track->audio.coded_framesize;
2384  int h = track->audio.sub_packet_h;
2385  int y = track->audio.sub_packet_cnt;
2386  int w = track->audio.frame_size;
2387  int x;
2388 
2389  if (!track->audio.pkt_cnt) {
2390  if (track->audio.sub_packet_cnt == 0)
2391  track->audio.buf_timecode = timecode;
2392  if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2393  if (size < cfs * h / 2) {
2394  av_log(matroska->ctx, AV_LOG_ERROR,
2395  "Corrupt int4 RM-style audio packet size\n");
2396  return AVERROR_INVALIDDATA;
2397  }
2398  for (x = 0; x < h / 2; x++)
2399  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2400  data + x * cfs, cfs);
2401  } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2402  if (size < w) {
2403  av_log(matroska->ctx, AV_LOG_ERROR,
2404  "Corrupt sipr RM-style audio packet size\n");
2405  return AVERROR_INVALIDDATA;
2406  }
2407  memcpy(track->audio.buf + y * w, data, w);
2408  } else {
2409  if (size < sps * w / sps || h<=0 || w%sps) {
2410  av_log(matroska->ctx, AV_LOG_ERROR,
2411  "Corrupt generic RM-style audio packet size\n");
2412  return AVERROR_INVALIDDATA;
2413  }
2414  for (x = 0; x < w / sps; x++)
2415  memcpy(track->audio.buf +
2416  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2417  data + x * sps, sps);
2418  }
2419 
2420  if (++track->audio.sub_packet_cnt >= h) {
2421  if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2422  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2423  track->audio.sub_packet_cnt = 0;
2424  track->audio.pkt_cnt = h * w / a;
2425  }
2426  }
2427 
2428  while (track->audio.pkt_cnt) {
2429  int ret;
2430  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2431  if (!pkt)
2432  return AVERROR(ENOMEM);
2433 
2434  ret = av_new_packet(pkt, a);
2435  if (ret < 0) {
2436  av_free(pkt);
2437  return ret;
2438  }
2439  memcpy(pkt->data,
2440  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2441  a);
2442  pkt->pts = track->audio.buf_timecode;
2444  pkt->pos = pos;
2445  pkt->stream_index = st->index;
2446  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2447  }
2448 
2449  return 0;
2450 }
2451 
2452 /* reconstruct full wavpack blocks from mangled matroska ones */
2454  uint8_t **pdst, int *size)
2455 {
2456  uint8_t *dst = NULL;
2457  int dstlen = 0;
2458  int srclen = *size;
2459  uint32_t samples;
2460  uint16_t ver;
2461  int ret, offset = 0;
2462 
2463  if (srclen < 12 || track->stream->codec->extradata_size < 2)
2464  return AVERROR_INVALIDDATA;
2465 
2466  ver = AV_RL16(track->stream->codec->extradata);
2467 
2468  samples = AV_RL32(src);
2469  src += 4;
2470  srclen -= 4;
2471 
2472  while (srclen >= 8) {
2473  int multiblock;
2474  uint32_t blocksize;
2475  uint8_t *tmp;
2476 
2477  uint32_t flags = AV_RL32(src);
2478  uint32_t crc = AV_RL32(src + 4);
2479  src += 8;
2480  srclen -= 8;
2481 
2482  multiblock = (flags & 0x1800) != 0x1800;
2483  if (multiblock) {
2484  if (srclen < 4) {
2485  ret = AVERROR_INVALIDDATA;
2486  goto fail;
2487  }
2488  blocksize = AV_RL32(src);
2489  src += 4;
2490  srclen -= 4;
2491  } else
2492  blocksize = srclen;
2493 
2494  if (blocksize > srclen) {
2495  ret = AVERROR_INVALIDDATA;
2496  goto fail;
2497  }
2498 
2499  tmp = av_realloc(dst, dstlen + blocksize + 32);
2500  if (!tmp) {
2501  ret = AVERROR(ENOMEM);
2502  goto fail;
2503  }
2504  dst = tmp;
2505  dstlen += blocksize + 32;
2506 
2507  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2508  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2509  AV_WL16(dst + offset + 8, ver); // version
2510  AV_WL16(dst + offset + 10, 0); // track/index_no
2511  AV_WL32(dst + offset + 12, 0); // total samples
2512  AV_WL32(dst + offset + 16, 0); // block index
2513  AV_WL32(dst + offset + 20, samples); // number of samples
2514  AV_WL32(dst + offset + 24, flags); // flags
2515  AV_WL32(dst + offset + 28, crc); // crc
2516  memcpy(dst + offset + 32, src, blocksize); // block data
2517 
2518  src += blocksize;
2519  srclen -= blocksize;
2520  offset += blocksize + 32;
2521  }
2522 
2523  *pdst = dst;
2524  *size = dstlen;
2525 
2526  return 0;
2527 
2528 fail:
2529  av_freep(&dst);
2530  return ret;
2531 }
2532 
2534  MatroskaTrack *track,
2535  AVStream *st,
2536  uint8_t *data, int data_len,
2537  uint64_t timecode,
2538  uint64_t duration,
2539  int64_t pos)
2540 {
2541  AVPacket *pkt;
2542  uint8_t *id, *settings, *text, *buf;
2543  int id_len, settings_len, text_len;
2544  uint8_t *p, *q;
2545  int err;
2546 
2547  if (data_len <= 0)
2548  return AVERROR_INVALIDDATA;
2549 
2550  p = data;
2551  q = data + data_len;
2552 
2553  id = p;
2554  id_len = -1;
2555  while (p < q) {
2556  if (*p == '\r' || *p == '\n') {
2557  id_len = p - id;
2558  if (*p == '\r')
2559  p++;
2560  break;
2561  }
2562  p++;
2563  }
2564 
2565  if (p >= q || *p != '\n')
2566  return AVERROR_INVALIDDATA;
2567  p++;
2568 
2569  settings = p;
2570  settings_len = -1;
2571  while (p < q) {
2572  if (*p == '\r' || *p == '\n') {
2573  settings_len = p - settings;
2574  if (*p == '\r')
2575  p++;
2576  break;
2577  }
2578  p++;
2579  }
2580 
2581  if (p >= q || *p != '\n')
2582  return AVERROR_INVALIDDATA;
2583  p++;
2584 
2585  text = p;
2586  text_len = q - p;
2587  while (text_len > 0) {
2588  const int len = text_len - 1;
2589  const uint8_t c = p[len];
2590  if (c != '\r' && c != '\n')
2591  break;
2592  text_len = len;
2593  }
2594 
2595  if (text_len <= 0)
2596  return AVERROR_INVALIDDATA;
2597 
2598  pkt = av_mallocz(sizeof(*pkt));
2599  if (!pkt)
2600  return AVERROR(ENOMEM);
2601  err = av_new_packet(pkt, text_len);
2602  if (err < 0) {
2603  av_free(pkt);
2604  return AVERROR(err);
2605  }
2606 
2607  memcpy(pkt->data, text, text_len);
2608 
2609  if (id_len > 0) {
2610  buf = av_packet_new_side_data(pkt,
2612  id_len);
2613  if (!buf) {
2614  av_free(pkt);
2615  return AVERROR(ENOMEM);
2616  }
2617  memcpy(buf, id, id_len);
2618  }
2619 
2620  if (settings_len > 0) {
2621  buf = av_packet_new_side_data(pkt,
2623  settings_len);
2624  if (!buf) {
2625  av_free(pkt);
2626  return AVERROR(ENOMEM);
2627  }
2628  memcpy(buf, settings, settings_len);
2629  }
2630 
2631  // Do we need this for subtitles?
2632  // pkt->flags = AV_PKT_FLAG_KEY;
2633 
2634  pkt->stream_index = st->index;
2635  pkt->pts = timecode;
2636 
2637  // Do we need this for subtitles?
2638  // pkt->dts = timecode;
2639 
2640  pkt->duration = duration;
2641  pkt->pos = pos;
2642 
2643  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2644  matroska->prev_pkt = pkt;
2645 
2646  return 0;
2647 }
2648 
2650  MatroskaTrack *track, AVStream *st,
2651  uint8_t *data, int pkt_size,
2652  uint64_t timecode, uint64_t lace_duration,
2653  int64_t pos, int is_keyframe,
2654  uint8_t *additional, uint64_t additional_id, int additional_size,
2655  int64_t discard_padding)
2656 {
2657  MatroskaTrackEncoding *encodings = track->encodings.elem;
2658  uint8_t *pkt_data = data;
2659  int offset = 0, res;
2660  AVPacket *pkt;
2661 
2662  if (encodings && !encodings->type && encodings->scope & 1) {
2663  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2664  if (res < 0)
2665  return res;
2666  }
2667 
2668  if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2669  uint8_t *wv_data;
2670  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2671  if (res < 0) {
2672  av_log(matroska->ctx, AV_LOG_ERROR,
2673  "Error parsing a wavpack block.\n");
2674  goto fail;
2675  }
2676  if (pkt_data != data)
2677  av_freep(&pkt_data);
2678  pkt_data = wv_data;
2679  }
2680 
2681  if (st->codec->codec_id == AV_CODEC_ID_PRORES &&
2682  AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
2683  offset = 8;
2684 
2685  pkt = av_mallocz(sizeof(AVPacket));
2686  if (!pkt) {
2687  if (pkt_data != data)
2688  av_freep(&pkt_data);
2689  return AVERROR(ENOMEM);
2690  }
2691  /* XXX: prevent data copy... */
2692  if (av_new_packet(pkt, pkt_size + offset) < 0) {
2693  av_free(pkt);
2694  res = AVERROR(ENOMEM);
2695  goto fail;
2696  }
2697 
2698  if (st->codec->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
2699  uint8_t *buf = pkt->data;
2700  bytestream_put_be32(&buf, pkt_size);
2701  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2702  }
2703 
2704  memcpy(pkt->data + offset, pkt_data, pkt_size);
2705 
2706  if (pkt_data != data)
2707  av_freep(&pkt_data);
2708 
2709  pkt->flags = is_keyframe;
2710  pkt->stream_index = st->index;
2711 
2712  if (additional_size > 0) {
2713  uint8_t *side_data = av_packet_new_side_data(pkt,
2715  additional_size + 8);
2716  if (!side_data) {
2717  av_free_packet(pkt);
2718  av_free(pkt);
2719  return AVERROR(ENOMEM);
2720  }
2721  AV_WB64(side_data, additional_id);
2722  memcpy(side_data + 8, additional, additional_size);
2723  }
2724 
2725  if (discard_padding) {
2726  uint8_t *side_data = av_packet_new_side_data(pkt,
2728  10);
2729  if (!side_data) {
2730  av_free_packet(pkt);
2731  av_free(pkt);
2732  return AVERROR(ENOMEM);
2733  }
2734  AV_WL32(side_data, 0);
2735  AV_WL32(side_data + 4, av_rescale_q(discard_padding,
2736  (AVRational){1, 1000000000},
2737  (AVRational){1, st->codec->sample_rate}));
2738  }
2739 
2740  if (track->ms_compat)
2741  pkt->dts = timecode;
2742  else
2743  pkt->pts = timecode;
2744  pkt->pos = pos;
2745  if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
2746  /*
2747  * For backward compatibility.
2748  * Historically, we have put subtitle duration
2749  * in convergence_duration, on the off chance
2750  * that the time_scale is less than 1us, which
2751  * could result in a 32bit overflow on the
2752  * normal duration field.
2753  */
2754  pkt->convergence_duration = lace_duration;
2755  }
2756 
2757  if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE ||
2758  lace_duration <= INT_MAX) {
2759  /*
2760  * For non subtitle tracks, just store the duration
2761  * as normal.
2762  *
2763  * If it's a subtitle track and duration value does
2764  * not overflow a uint32, then also store it normally.
2765  */
2766  pkt->duration = lace_duration;
2767  }
2768 
2769  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2770  matroska->prev_pkt = pkt;
2771 
2772  return 0;
2773 
2774 fail:
2775  if (pkt_data != data)
2776  av_freep(&pkt_data);
2777  return res;
2778 }
2779 
2781  int size, int64_t pos, uint64_t cluster_time,
2782  uint64_t block_duration, int is_keyframe,
2783  uint8_t *additional, uint64_t additional_id, int additional_size,
2784  int64_t cluster_pos, int64_t discard_padding)
2785 {
2786  uint64_t timecode = AV_NOPTS_VALUE;
2787  MatroskaTrack *track;
2788  int res = 0;
2789  AVStream *st;
2790  int16_t block_time;
2791  uint32_t *lace_size = NULL;
2792  int n, flags, laces = 0;
2793  uint64_t num;
2794  int trust_default_duration = 1;
2795 
2796  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2797  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2798  return n;
2799  }
2800  data += n;
2801  size -= n;
2802 
2803  track = matroska_find_track_by_num(matroska, num);
2804  if (!track || !track->stream) {
2805  av_log(matroska->ctx, AV_LOG_INFO,
2806  "Invalid stream %"PRIu64" or size %u\n", num, size);
2807  return AVERROR_INVALIDDATA;
2808  } else if (size <= 3)
2809  return 0;
2810  st = track->stream;
2811  if (st->discard >= AVDISCARD_ALL)
2812  return res;
2813  av_assert1(block_duration != AV_NOPTS_VALUE);
2814 
2815  block_time = sign_extend(AV_RB16(data), 16);
2816  data += 2;
2817  flags = *data++;
2818  size -= 3;
2819  if (is_keyframe == -1)
2820  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2821 
2822  if (cluster_time != (uint64_t) -1 &&
2823  (block_time >= 0 || cluster_time >= -block_time)) {
2824  timecode = cluster_time + block_time - track->codec_delay;
2825  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2826  timecode < track->end_timecode)
2827  is_keyframe = 0; /* overlapping subtitles are not key frame */
2828  if (is_keyframe)
2829  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2831  }
2832 
2833  if (matroska->skip_to_keyframe &&
2834  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2835  if (timecode < matroska->skip_to_timecode)
2836  return res;
2837  if (is_keyframe)
2838  matroska->skip_to_keyframe = 0;
2839  else if (!st->skip_to_keyframe) {
2840  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
2841  matroska->skip_to_keyframe = 0;
2842  }
2843  }
2844 
2845  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2846  &lace_size, &laces);
2847 
2848  if (res)
2849  goto end;
2850 
2851  if (track->audio.samplerate == 8000) {
2852  // If this is needed for more codecs, then add them here
2853  if (st->codec->codec_id == AV_CODEC_ID_AC3) {
2854  if (track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
2855  trust_default_duration = 0;
2856  }
2857  }
2858 
2859  if (!block_duration && trust_default_duration)
2860  block_duration = track->default_duration * laces / matroska->time_scale;
2861 
2862  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
2863  track->end_timecode =
2864  FFMAX(track->end_timecode, timecode + block_duration);
2865 
2866  for (n = 0; n < laces; n++) {
2867  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
2868 
2869  if (lace_size[n] > size) {
2870  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
2871  break;
2872  }
2873 
2874  if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2875  st->codec->codec_id == AV_CODEC_ID_COOK ||
2876  st->codec->codec_id == AV_CODEC_ID_SIPR ||
2877  st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2878  st->codec->block_align && track->audio.sub_packet_size) {
2879  res = matroska_parse_rm_audio(matroska, track, st, data,
2880  lace_size[n],
2881  timecode, pos);
2882  if (res)
2883  goto end;
2884 
2885  } else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
2886  res = matroska_parse_webvtt(matroska, track, st,
2887  data, lace_size[n],
2888  timecode, lace_duration,
2889  pos);
2890  if (res)
2891  goto end;
2892  } else {
2893  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2894  timecode, lace_duration, pos,
2895  !n ? is_keyframe : 0,
2896  additional, additional_id, additional_size,
2897  discard_padding);
2898  if (res)
2899  goto end;
2900  }
2901 
2902  if (timecode != AV_NOPTS_VALUE)
2903  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
2904  data += lace_size[n];
2905  size -= lace_size[n];
2906  }
2907 
2908 end:
2909  av_free(lace_size);
2910  return res;
2911 }
2912 
2914 {
2915  EbmlList *blocks_list;
2916  MatroskaBlock *blocks;
2917  int i, res;
2918  res = ebml_parse(matroska,
2919  matroska_cluster_incremental_parsing,
2920  &matroska->current_cluster);
2921  if (res == 1) {
2922  /* New Cluster */
2923  if (matroska->current_cluster_pos)
2924  ebml_level_end(matroska);
2925  ebml_free(matroska_cluster, &matroska->current_cluster);
2926  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2927  matroska->current_cluster_num_blocks = 0;
2928  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2929  matroska->prev_pkt = NULL;
2930  /* sizeof the ID which was already read */
2931  if (matroska->current_id)
2932  matroska->current_cluster_pos -= 4;
2933  res = ebml_parse(matroska,
2934  matroska_clusters_incremental,
2935  &matroska->current_cluster);
2936  /* Try parsing the block again. */
2937  if (res == 1)
2938  res = ebml_parse(matroska,
2939  matroska_cluster_incremental_parsing,
2940  &matroska->current_cluster);
2941  }
2942 
2943  if (!res &&
2944  matroska->current_cluster_num_blocks <
2945  matroska->current_cluster.blocks.nb_elem) {
2946  blocks_list = &matroska->current_cluster.blocks;
2947  blocks = blocks_list->elem;
2948 
2949  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2950  i = blocks_list->nb_elem - 1;
2951  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2952  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2953  uint8_t* additional = blocks[i].additional.size > 0 ?
2954  blocks[i].additional.data : NULL;
2955  if (!blocks[i].non_simple)
2956  blocks[i].duration = 0;
2957  res = matroska_parse_block(matroska, blocks[i].bin.data,
2958  blocks[i].bin.size, blocks[i].bin.pos,
2959  matroska->current_cluster.timecode,
2960  blocks[i].duration, is_keyframe,
2961  additional, blocks[i].additional_id,
2962  blocks[i].additional.size,
2963  matroska->current_cluster_pos,
2964  blocks[i].discard_padding);
2965  }
2966  }
2967 
2968  return res;
2969 }
2970 
2972 {
2973  MatroskaCluster cluster = { 0 };
2974  EbmlList *blocks_list;
2975  MatroskaBlock *blocks;
2976  int i, res;
2977  int64_t pos;
2978 
2979  if (!matroska->contains_ssa)
2980  return matroska_parse_cluster_incremental(matroska);
2981  pos = avio_tell(matroska->ctx->pb);
2982  matroska->prev_pkt = NULL;
2983  if (matroska->current_id)
2984  pos -= 4; /* sizeof the ID which was already read */
2985  res = ebml_parse(matroska, matroska_clusters, &cluster);
2986  blocks_list = &cluster.blocks;
2987  blocks = blocks_list->elem;
2988  for (i = 0; i < blocks_list->nb_elem; i++)
2989  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2990  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2991  res = matroska_parse_block(matroska, blocks[i].bin.data,
2992  blocks[i].bin.size, blocks[i].bin.pos,
2993  cluster.timecode, blocks[i].duration,
2994  is_keyframe, NULL, 0, 0, pos,
2995  blocks[i].discard_padding);
2996  }
2997  ebml_free(matroska_cluster, &cluster);
2998  return res;
2999 }
3000 
3002 {
3003  MatroskaDemuxContext *matroska = s->priv_data;
3004 
3005  while (matroska_deliver_packet(matroska, pkt)) {
3006  int64_t pos = avio_tell(matroska->ctx->pb);
3007  if (matroska->done)
3008  return AVERROR_EOF;
3009  if (matroska_parse_cluster(matroska) < 0)
3010  matroska_resync(matroska, pos);
3011  }
3012 
3013  return 0;
3014 }
3015 
3016 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3017  int64_t timestamp, int flags)
3018 {
3019  MatroskaDemuxContext *matroska = s->priv_data;
3020  MatroskaTrack *tracks = NULL;
3021  AVStream *st = s->streams[stream_index];
3022  int i, index, index_sub, index_min;
3023 
3024  /* Parse the CUES now since we need the index data to seek. */
3025  if (matroska->cues_parsing_deferred > 0) {
3026  matroska->cues_parsing_deferred = 0;
3027  matroska_parse_cues(matroska);
3028  }
3029 
3030  if (!st->nb_index_entries)
3031  goto err;
3032  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3033 
3034  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3035  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3036  SEEK_SET);
3037  matroska->current_id = 0;
3038  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3039  matroska_clear_queue(matroska);
3040  if (matroska_parse_cluster(matroska) < 0)
3041  break;
3042  }
3043  }
3044 
3045  matroska_clear_queue(matroska);
3046  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3047  goto err;
3048 
3049  index_min = index;
3050  tracks = matroska->tracks.elem;
3051  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3052  tracks[i].audio.pkt_cnt = 0;
3053  tracks[i].audio.sub_packet_cnt = 0;
3054  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3055  tracks[i].end_timecode = 0;
3056  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3057  tracks[i].stream->discard != AVDISCARD_ALL) {
3058  index_sub = av_index_search_timestamp(
3059  tracks[i].stream, st->index_entries[index].timestamp,
3061  while (index_sub >= 0 &&
3062  index_min > 0 &&
3063  tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3064  st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3065  index_min--;
3066  }
3067  }
3068 
3069  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3070  matroska->current_id = 0;
3071  if (flags & AVSEEK_FLAG_ANY) {
3072  st->skip_to_keyframe = 0;
3073  matroska->skip_to_timecode = timestamp;
3074  } else {
3075  st->skip_to_keyframe = 1;
3076  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3077  }
3078  matroska->skip_to_keyframe = 1;
3079  matroska->done = 0;
3080  matroska->num_levels = 0;
3081  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3082  return 0;
3083 err:
3084  // slightly hackish but allows proper fallback to
3085  // the generic seeking code.
3086  matroska_clear_queue(matroska);
3087  matroska->current_id = 0;
3088  st->skip_to_keyframe =
3089  matroska->skip_to_keyframe = 0;
3090  matroska->done = 0;
3091  matroska->num_levels = 0;
3092  return -1;
3093 }
3094 
3096 {
3097  MatroskaDemuxContext *matroska = s->priv_data;
3098  MatroskaTrack *tracks = matroska->tracks.elem;
3099  int n;
3100 
3101  matroska_clear_queue(matroska);
3102 
3103  for (n = 0; n < matroska->tracks.nb_elem; n++)
3104  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3105  av_freep(&tracks[n].audio.buf);
3106  ebml_free(matroska_cluster, &matroska->current_cluster);
3107  ebml_free(matroska_segment, matroska);
3108 
3109  return 0;
3110 }
3111 
3112 typedef struct {
3113  int64_t start_time_ns;
3114  int64_t end_time_ns;
3115  int64_t start_offset;
3116  int64_t end_offset;
3117 } CueDesc;
3118 
3119 /* This function searches all the Cues and returns the CueDesc corresponding the
3120  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3121  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3122  */
3123 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3124  MatroskaDemuxContext *matroska = s->priv_data;
3125  CueDesc cue_desc;
3126  int i;
3127  int nb_index_entries = s->streams[0]->nb_index_entries;
3128  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3129  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3130  for (i = 1; i < nb_index_entries; i++) {
3131  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3132  index_entries[i].timestamp * matroska->time_scale > ts) {
3133  break;
3134  }
3135  }
3136  --i;
3137  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3138  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3139  if (i != nb_index_entries - 1) {
3140  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3141  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3142  } else {
3143  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3144  // FIXME: this needs special handling for files where Cues appear
3145  // before Clusters. the current logic assumes Cues appear after
3146  // Clusters.
3147  cue_desc.end_offset = cues_start - matroska->segment_start;
3148  }
3149  return cue_desc;
3150 }
3151 
3153 {
3154  MatroskaDemuxContext *matroska = s->priv_data;
3155  int64_t cluster_pos, before_pos;
3156  int index, rv = 1;
3157  if (s->streams[0]->nb_index_entries <= 0) return 0;
3158  // seek to the first cluster using cues.
3159  index = av_index_search_timestamp(s->streams[0], 0, 0);
3160  if (index < 0) return 0;
3161  cluster_pos = s->streams[0]->index_entries[index].pos;
3162  before_pos = avio_tell(s->pb);
3163  while (1) {
3164  int64_t cluster_id = 0, cluster_length = 0;
3165  AVPacket *pkt;
3166  avio_seek(s->pb, cluster_pos, SEEK_SET);
3167  // read cluster id and length
3168  ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3169  ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3170  if (cluster_id != 0xF43B675) { // done with all clusters
3171  break;
3172  }
3173  avio_seek(s->pb, cluster_pos, SEEK_SET);
3174  matroska->current_id = 0;
3175  matroska_clear_queue(matroska);
3176  if (matroska_parse_cluster(matroska) < 0 ||
3177  matroska->num_packets <= 0) {
3178  break;
3179  }
3180  pkt = matroska->packets[0];
3181  cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3182  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3183  rv = 0;
3184  break;
3185  }
3186  }
3187  avio_seek(s->pb, before_pos, SEEK_SET);
3188  return rv;
3189 }
3190 
3191 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3192  double min_buffer, double* buffer,
3193  double* sec_to_download, AVFormatContext *s,
3194  int64_t cues_start)
3195 {
3196  double nano_seconds_per_second = 1000000000.0;
3197  double time_sec = time_ns / nano_seconds_per_second;
3198  int rv = 0;
3199  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3200  int64_t end_time_ns = time_ns + time_to_search_ns;
3201  double sec_downloaded = 0.0;
3202  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3203  if (desc_curr.start_time_ns == -1)
3204  return -1;
3205  *sec_to_download = 0.0;
3206 
3207  // Check for non cue start time.
3208  if (time_ns > desc_curr.start_time_ns) {
3209  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3210  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3211  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3212  double timeToDownload = (cueBytes * 8.0) / bps;
3213 
3214  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3215  *sec_to_download += timeToDownload;
3216 
3217  // Check if the search ends within the first cue.
3218  if (desc_curr.end_time_ns >= end_time_ns) {
3219  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3220  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3221  sec_downloaded = percent_to_sub * sec_downloaded;
3222  *sec_to_download = percent_to_sub * *sec_to_download;
3223  }
3224 
3225  if ((sec_downloaded + *buffer) <= min_buffer) {
3226  return 1;
3227  }
3228 
3229  // Get the next Cue.
3230  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3231  }
3232 
3233  while (desc_curr.start_time_ns != -1) {
3234  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3235  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3236  double desc_sec = desc_ns / nano_seconds_per_second;
3237  double bits = (desc_bytes * 8.0);
3238  double time_to_download = bits / bps;
3239 
3240  sec_downloaded += desc_sec - time_to_download;
3241  *sec_to_download += time_to_download;
3242 
3243  if (desc_curr.end_time_ns >= end_time_ns) {
3244  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3245  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3246  sec_downloaded = percent_to_sub * sec_downloaded;
3247  *sec_to_download = percent_to_sub * *sec_to_download;
3248 
3249  if ((sec_downloaded + *buffer) <= min_buffer)
3250  rv = 1;
3251  break;
3252  }
3253 
3254  if ((sec_downloaded + *buffer) <= min_buffer) {
3255  rv = 1;
3256  break;
3257  }
3258 
3259  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3260  }
3261  *buffer = *buffer + sec_downloaded;
3262  return rv;
3263 }
3264 
3265 /* This function computes the bandwidth of the WebM file with the help of
3266  * buffer_size_after_time_downloaded() function. Both of these functions are
3267  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3268  * Matroska parsing mechanism.
3269  *
3270  * Returns the bandwidth of the file on success; -1 on error.
3271  * */
3272 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3273 {
3274  MatroskaDemuxContext *matroska = s->priv_data;
3275  AVStream *st = s->streams[0];
3276  double bandwidth = 0.0;
3277  int i;
3278 
3279  for (i = 0; i < st->nb_index_entries; i++) {
3280  int64_t prebuffer_ns = 1000000000;
3281  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3282  double nano_seconds_per_second = 1000000000.0;
3283  int64_t prebuffered_ns = time_ns + prebuffer_ns;
3284  double prebuffer_bytes = 0.0;
3285  int64_t temp_prebuffer_ns = prebuffer_ns;
3286  int64_t pre_bytes, pre_ns;
3287  double pre_sec, prebuffer, bits_per_second;
3288  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3289 
3290  // Start with the first Cue.
3291  CueDesc desc_end = desc_beg;
3292 
3293  // Figure out how much data we have downloaded for the prebuffer. This will
3294  // be used later to adjust the bits per sample to try.
3295  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3296  // Prebuffered the entire Cue.
3297  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3298  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3299  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3300  }
3301  if (desc_end.start_time_ns == -1) {
3302  // The prebuffer is larger than the duration.
3303  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3304  return -1;
3305  bits_per_second = 0.0;
3306  } else {
3307  // The prebuffer ends in the last Cue. Estimate how much data was
3308  // prebuffered.
3309  pre_bytes = desc_end.end_offset - desc_end.start_offset;
3310  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3311  pre_sec = pre_ns / nano_seconds_per_second;
3312  prebuffer_bytes +=
3313  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3314 
3315  prebuffer = prebuffer_ns / nano_seconds_per_second;
3316 
3317  // Set this to 0.0 in case our prebuffer buffers the entire video.
3318  bits_per_second = 0.0;
3319  do {
3320  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3321  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3322  double desc_sec = desc_ns / nano_seconds_per_second;
3323  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3324 
3325  // Drop the bps by the percentage of bytes buffered.
3326  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3327  double mod_bits_per_second = calc_bits_per_second * percent;
3328 
3329  if (prebuffer < desc_sec) {
3330  double search_sec =
3331  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3332 
3333  // Add 1 so the bits per second should be a little bit greater than file
3334  // datarate.
3335  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3336  const double min_buffer = 0.0;
3337  double buffer = prebuffer;
3338  double sec_to_download = 0.0;
3339 
3340  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3341  min_buffer, &buffer, &sec_to_download,
3342  s, cues_start);
3343  if (rv < 0) {
3344  return -1;
3345  } else if (rv == 0) {
3346  bits_per_second = (double)(bps);
3347  break;
3348  }
3349  }
3350 
3351  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3352  } while (desc_end.start_time_ns != -1);
3353  }
3354  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3355  }
3356  return (int64_t)bandwidth;
3357 }
3358 
3360 {
3361  MatroskaDemuxContext *matroska = s->priv_data;
3362  EbmlList *seekhead_list = &matroska->seekhead;
3363  MatroskaSeekhead *seekhead = seekhead_list->elem;
3364  char *buf;
3365  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3366  int i;
3367 
3368  // determine cues start and end positions
3369  for (i = 0; i < seekhead_list->nb_elem; i++)
3370  if (seekhead[i].id == MATROSKA_ID_CUES)
3371  break;
3372 
3373  if (i >= seekhead_list->nb_elem) return -1;
3374 
3375  before_pos = avio_tell(matroska->ctx->pb);
3376  cues_start = seekhead[i].pos + matroska->segment_start;
3377  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3378  // cues_end is computed as cues_start + cues_length + length of the
3379  // Cues element ID + EBML length of the Cues element. cues_end is
3380  // inclusive and the above sum is reduced by 1.
3381  uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3382  bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3383  bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3384  cues_end = cues_start + cues_length + bytes_read - 1;
3385  }
3386  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3387  if (cues_start == -1 || cues_end == -1) return -1;
3388 
3389  // parse the cues
3390  matroska_parse_cues(matroska);
3391 
3392  // cues start
3393  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3394 
3395  // cues end
3396  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3397 
3398  // bandwidth
3399  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3400  if (bandwidth < 0) return -1;
3401  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3402 
3403  // check if all clusters start with key frames
3405 
3406  // store cue point timestamps as a comma separated list for checking subsegment alignment in
3407  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3408  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3409  if (!buf) return -1;
3410  strcpy(buf, "");
3411  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3412  snprintf(buf, (i + 1) * 20 * sizeof(char),
3413  "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3414  if (i != s->streams[0]->nb_index_entries - 1)
3415  strncat(buf, ",", sizeof(char));
3416  }
3417  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3418  av_free(buf);
3419 
3420  return 0;
3421 }
3422 
3424 {
3425  char *buf;
3426  int ret = matroska_read_header(s);
3427  MatroskaTrack *tracks;
3428  MatroskaDemuxContext *matroska = s->priv_data;
3429  if (ret) {
3430  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3431  return -1;
3432  }
3433 
3434  if (!matroska->is_live) {
3435  buf = av_asprintf("%g", matroska->duration);
3436  if (!buf) return AVERROR(ENOMEM);
3437  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3438  av_free(buf);
3439 
3440  // initialization range
3441  // 5 is the offset of Cluster ID.
3443  }
3444 
3445  // basename of the file
3446  buf = strrchr(s->filename, '/');
3447  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3448 
3449  // track number
3450  tracks = matroska->tracks.elem;
3451  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3452 
3453  // parse the cues and populate Cue related fields
3454  return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3455 }
3456 
3458 {
3459  return AVERROR_EOF;
3460 }
3461 
3462 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3463 static const AVOption options[] = {
3464  { "live", "flag indicating that the input is a live file that only has the headers.", OFFSET(is_live), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
3465  { NULL },
3466 };
3467 
3468 static const AVClass webm_dash_class = {
3469  .class_name = "WebM DASH Manifest demuxer",
3470  .item_name = av_default_item_name,
3471  .option = options,
3472  .version = LIBAVUTIL_VERSION_INT,
3473 };
3474 
3476  .name = "matroska,webm",
3477  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3478  .extensions = "mkv,mk3d,mka,mks",
3479  .priv_data_size = sizeof(MatroskaDemuxContext),
3485  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3486 };
3487 
3489  .name = "webm_dash_manifest",
3490  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3491  .priv_data_size = sizeof(MatroskaDemuxContext),
3495  .priv_class = &webm_dash_class,
3496 };
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
const char * s
Definition: matroskadec.c:90
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2266
#define AV_DISPOSITION_METADATA
Definition: avformat.h:826
#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:416
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:2376
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:597
uint64_t seek_preroll
Definition: matroskadec.c:180
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:528
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1386
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:280
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1095
uint64_t type
Definition: matroskadec.c:171
static const EbmlSyntax matroska_tracks[]
Definition: matroskadec.c:457
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:101
static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3457
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2224
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
uint64_t version
Definition: matroskadec.c:107
AVOption.
Definition: opt.h:255
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:3475
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:1742
enum AVCodecID id
Definition: mxfenc.c:99
static const EbmlSyntax matroska_info[]
Definition: matroskadec.c:343
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:156
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2713
#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:694
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
#define INITIALIZATION_RANGE
Definition: matroska.h:289
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1187
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:915
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3152
else temp
Definition: vf_mcdeint.c:257
static const EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:538
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:4006
int64_t pos
Definition: avformat.h:784
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:137
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:131
uint64_t chapteruid
Definition: matroskadec.c:233
static const EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:354
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2268
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:322
EbmlList tag
Definition: matroskadec.c:239
uint64_t uid
Definition: matroskadec.c:170
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
MatroskaCluster current_cluster
Definition: matroskadec.c:308
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:2649
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:914
#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:843
#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:203
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:210
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1046
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:201
uint64_t flag_forced
Definition: matroskadec.c:179
union EbmlSyntax::@157 def
uint64_t max_size
Definition: matroskadec.c:108
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:177
uint64_t flag_default
Definition: matroskadec.c:178
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional FF_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:139
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:124
static const EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:406
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:132
char * name
Definition: matroskadec.c:222
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:276
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:2990
#define FF_ARRAY_ELEMS(a)
int version
Definition: avisynth_c.h:629
int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size, int big_endian)
Definition: riffdec.c:84
discard all
Definition: avcodec.h:669
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:269
static AVPacket pkt
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:160
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:674
MatroskaTrackAudio audio
Definition: matroskadec.c:182
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:85
uint64_t duration
Definition: matroskadec.c:318
const struct EbmlSyntax * n
Definition: matroskadec.c:91
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:223
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:85
#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:2022
#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:411
#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:3768
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:207
Format I/O context.
Definition: avformat.h:1272
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:225
UID uid
Definition: mxfenc.c:1802
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:1656
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:106
static const EbmlSyntax matroska_cluster[]
Definition: matroskadec.c:609
#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:188
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:3423
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
Definition: matroskadec.c:795
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1385
Public dictionary API.
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:178
static const EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:503
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1002
uint64_t pixel_height
Definition: matroskadec.c:136
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:318
if()
Definition: avfilter.c:975
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:138
MatroskaTrackOperation operation
Definition: matroskadec.c:183
MatroskaTrackVideo video
Definition: matroskadec.c:181
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:224
static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start)
Definition: matroskadec.c:3123
void * elem
Definition: matroskadec.c:97
AVOptions.
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:97
MatroskaTrackCompression compression
Definition: matroskadec.c:127
uint8_t * data
Definition: matroskadec.c:102
static int webm_dash_manifest_cues(AVFormatContext *s)
Definition: matroskadec.c:3359
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:71
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:689
uint64_t time
Definition: matroskadec.c:217
int ff_mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
Definition: matroska.c:151
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:117
#define TRACK_NUMBER
Definition: matroska.h:297
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1561
enum AVStreamParseType need_parsing
Definition: avformat.h:1035
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:196
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:175
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:222
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1355
static const EbmlSyntax matroska_segment[]
Definition: matroskadec.c:569
AVStream * stream
Definition: matroskadec.c:199
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3672
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
char * language
Definition: matroskadec.c:175
#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:85
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1340
#define MATROSKA_ID_CUERELATIVEPOSITION
Definition: matroska.h:161
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:129
static const EbmlSyntax matroska_segments[]
Definition: matroskadec.c:581
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:1383
uint8_t * data
Definition: avcodec.h:1162
uint64_t typevalue
Definition: matroskadec.c:231
uint64_t codec_delay
Definition: matroskadec.c:185
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2913
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:112
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:221
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
#define MATROSKA_ID_BLOCKADDITIONS
Definition: matroska.h:192
uint32_t tag
Definition: movenc.c:1333
static const EbmlSyntax matroska_index[]
Definition: matroskadec.c:523
int64_t start_time_ns
Definition: matroskadec.c:3113
#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:47
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
const uint8_t ff_log2_tab[256]
Definition: log2_tab.c:23
#define MATROSKA_ID_CUES
Definition: matroska.h:58
#define EBML_MAX_DEPTH
Definition: matroska.h:277
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:756
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:365
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:2720
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
static int64_t duration
Definition: ffplay.c:321
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:177
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1180
#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:537
#define AV_DISPOSITION_CAPTIONS
To specify text track kind (different from subtitles default).
Definition: avformat.h:824
EbmlList sub
Definition: matroskadec.c:226
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, uint64_t pos)
Definition: matroskadec.c:1420
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1208
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2971
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:967
#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:140
uint64_t display_height
Definition: matroskadec.c:134
#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:83
#define AVINDEX_KEYFRAME
Definition: avformat.h:791
#define FILENAME
Definition: matroska.h:292
EbmlType type
Definition: matroskadec.c:84
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:102
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1482
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:200
int64_t end_offset
Definition: matroskadec.c:3116
#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:1784
int profile
Definition: mxfenc.c:1804
static const uint16_t mask[17]
Definition: lzw.c:38
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2623
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:763
av_default_item_name
AVChapter * chapter
Definition: matroskadec.c:208
#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:785
#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:175
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:209
static const EbmlSyntax matroska_track_encoding[]
Definition: matroskadec.c:397
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num)
Definition: matroskadec.c:904
const char * r
Definition: vf_curves.c:107
int64_t convergence_duration
Time difference in AVStream->time_base units from the pts of this packet to the point at which the ou...
Definition: avcodec.h:1206
uint64_t display_width
Definition: matroskadec.c:133
#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:2780
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
EbmlBin additional
Definition: matroskadec.c:323
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
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:172
enum AVCodecID id
Definition: matroska.h:273
#define MATROSKA_ID_VIDEOPIXELCROPR
Definition: matroska.h:119
#define MATROSKA_ID_TRACKPLANEUID
Definition: matroska.h:86
GLsizei GLsizei * length
Definition: opengl_enc.c:115
#define MATROSKA_ID_ENCODINGCOMPSETTINGS
Definition: matroska.h:140
#define EBML_ID_EBMLMAXIDLENGTH
Definition: matroska.h:38
#define MATROSKA_ID_CHAPTERFLAGHIDDEN
Definition: matroska.h:226
static const EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c:517
static const EbmlSyntax matroska_chapter_entry[]
Definition: matroskadec.c:482
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:925
uint64_t timecode
Definition: matroskadec.c:253
#define FFMAX(a, b)
Definition: common.h:64
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
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:1168
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2046
Only parse headers, do not repack.
Definition: avformat.h:775
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:528
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1126
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:111
int nb_elem
Definition: matroskadec.c:96
#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:451
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:450
char * lang
Definition: matroskadec.c:224
static const EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:558
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:809
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:630
#define MATROSKA_ID_ENCODINGSIGHASHALGO
Definition: matroska.h:147
uint64_t skip_to_timecode
Definition: matroskadec.c:297
Definition: dct-test.c:51
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:2069
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1531
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:160
int bit_rate
the average bitrate
Definition: avcodec.h:1305
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1465
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:105
uint64_t start
Definition: matroskadec.c:203
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
char filename[1024]
input or output filename
Definition: avformat.h:1348
#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:127
#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:247
static const EbmlSyntax matroska_clusters[]
Definition: matroskadec.c:618
#define FFMIN(a, b)
Definition: common.h:66
#define MATROSKA_ID_TAGTARGETS
Definition: matroska.h:173
float y
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
AVPacket ** packets
Definition: matroskadec.c:289
#define MATROSKA_VIDEO_STEREO_PLANE_COUNT
Definition: matroska.h:279
#define MATROSKA_ID_TAGNAME
Definition: matroska.h:168
#define MATROSKA_ID_TRACKTIMECODESCALE
Definition: matroska.h:107
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
static int ebml_parse_elem(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1034
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:717
ret
Definition: avfilter.c:974
static const EbmlSyntax matroska_track_combine_planes[]
Definition: matroskadec.c:417
int width
picture width / height.
Definition: avcodec.h:1414
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:227
uint64_t id_length
Definition: matroskadec.c:109
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num)
Definition: matroskadec.c:1201
#define CLUSTER_KEYFRAME
Definition: matroska.h:295
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:167
uint64_t doctype_version
Definition: matroskadec.c:111
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
#define MATROSKA_ID_TRACKMAXCACHE
Definition: matroska.h:103
#define DURATION
Definition: matroska.h:294
int data_offset
Definition: matroskadec.c:86
#define MATROSKA_ID_CHAPTERPHYSEQUIV
Definition: matroska.h:228
static int matroska_read_close(AVFormatContext *s)
Definition: matroskadec.c:3095
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
EbmlBin codec_priv
Definition: matroskadec.c:174
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
Definition: matroskadec.c:837
static const EbmlSyntax ebml_syntax[]
Definition: matroskadec.c:338
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1215
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:215
#define OFFSET(x)
Definition: matroskadec.c:3462
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
Definition: lzo.c:134
int n
Definition: avisynth_c.h:547
AVDictionary * metadata
Definition: avformat.h:916
static const EbmlSyntax matroska_chapter[]
Definition: matroskadec.c:494
Opaque data information usually sparse.
Definition: avutil.h:198
#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:1159
#define EBML_ID_VOID
Definition: matroska.h:45
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1351
uint64_t max_block_additional_id
Definition: matroskadec.c:190
#define MATROSKA_ID_AUDIOSAMPLINGFREQ
Definition: matroska.h:128
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:819
double f
Definition: matroskadec.c:89
#define MATROSKA_ID_TRACKMINCACHE
Definition: matroska.h:102
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
Definition: matroskadec.c:1571
static int matroska_parse_flac(AVFormatContext *s, MatroskaTrack *track, int *offset)
Definition: matroskadec.c:1582
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:620
static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: matroskadec.c:3016
Stream structure.
Definition: avformat.h:842
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:2453
#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:2005
static const EbmlSyntax matroska_tags[]
Definition: matroskadec.c:553
EbmlList encodings
Definition: matroskadec.c:184
#define CUES_END
Definition: matroska.h:291
char * codec_id
Definition: matroskadec.c:173
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:797
static const EbmlSyntax matroska_track_operation[]
Definition: matroskadec.c:422
static const EbmlSyntax matroska_cluster_incremental[]
Definition: matroskadec.c:641
int64_t current_cluster_pos
Definition: matroskadec.c:307
#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:1637
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:825
AVS_Value src
Definition: avisynth_c.h:482
#define MATROSKA_ID_TRACKFLAGFORCED
Definition: matroska.h:100
#define MATROSKA_ID_TAGS
Definition: matroska.h:59
enum AVMediaType codec_type
Definition: avcodec.h:1249
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom.c:264
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
Definition: matroskadec.c:882
enum AVCodecID codec_id
Definition: avcodec.h:1258
#define MATROSKA_ID_TAGDEFAULT
Definition: matroska.h:171
#define BANDWIDTH
Definition: matroska.h:293
#define MATROSKA_ID_SEEKID
Definition: matroska.h:184
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:265
static const EbmlSyntax matroska_track_encoding_compression[]
Definition: matroskadec.c:381
int sample_rate
samples per second
Definition: avcodec.h:1985
AVIOContext * pb
I/O context.
Definition: avformat.h:1314
static const EbmlSyntax matroska_track[]
Definition: matroskadec.c:427
#define MATROSKA_ID_ENCODINGCOMPALGO
Definition: matroska.h:139
#define MATROSKA_ID_BLOCK
Definition: matroska.h:199
#define MATROSKA_ID_INFO
Definition: matroska.h:56
#define MATROSKA_ID_TAGTARGETS_TRACKUID
Definition: matroska.h:176
static const EbmlSyntax ebml_header[]
Definition: matroskadec.c:327
#define CUE_TIMESTAMPS
Definition: matroska.h:296
#define MATROSKA_ID_TAGLANG
Definition: matroska.h:170
uint64_t pixel_width
Definition: matroskadec.c:135
#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:1273
static const AVClass webm_dash_class
Definition: matroskadec.c:3468
int64_t start_offset
Definition: matroskadec.c:3115
#define MATROSKA_ID_TRACKFLAGENABLED
Definition: matroska.h:98
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2864
#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:1090
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1356
#define MATROSKA_ID_TRACKNAME
Definition: matroska.h:96
uint64_t start
Definition: matroskadec.c:248
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:1048
#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:218
uint64_t u
Definition: matroskadec.c:88
#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:592
#define MATROSKA_ID_BLOCKGROUP
Definition: matroska.h:191
#define MATROSKA_ID_VIDEOPIXELHEIGHT
Definition: matroska.h:115
rational number numerator/denominator
Definition: rational.h:43
#define MATROSKA_ID_CUEDURATION
Definition: matroska.h:162
AVStream * stream
Definition: matroskadec.c:187
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, int *buf_size, int type, uint32_t **lace_buf, int *laces)
Definition: matroskadec.c:2267
#define MATROSKA_ID_CUETIME
Definition: matroska.h:155
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:286
#define MATROSKA_ID_ENCODINGSIGALGO
Definition: matroska.h:146
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3001
Recommmends skipping the specified number of samples.
Definition: avcodec.h:1055
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:951
static av_always_inline void flac_parse_block_header(const uint8_t *block_header, int *last, int *type, int *size)
Parse the metadata block parameters from the header.
Definition: flac.h:151
#define MATROSKA_ID_ENCODINGSIGKEYID
Definition: matroska.h:148
#define MATROSKA_ID_TITLE
Definition: matroska.h:68
#define snprintf
Definition: snprintf.h:34
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:458
AVFormatContext * ctx
Definition: matroskadec.c:265
#define MATROSKA_ID_TRACKVIDEO
Definition: matroska.h:81
int64_t discard_padding
Definition: matroskadec.c:324
int size
Definition: matroskadec.c:101
static const EbmlSyntax matroska_attachments[]
Definition: matroskadec.c:471
int error
contains the error code or 0 if no error happened
Definition: avio.h:145
static const EbmlSyntax matroska_clusters_incremental[]
Definition: matroskadec.c:650
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, uint32_t id, void *data)
Definition: matroskadec.c:934
int list_elem_size
Definition: matroskadec.c:85
size_t av_strlcat(char *dst, const char *src, size_t size)
Append the string src to the string dst, but to a total length of no more than size - 1 bytes...
Definition: avstring.c:93
static const EbmlSyntax matroska_cluster_incremental_parsing[]
Definition: matroskadec.c:627
#define MATROSKA_ID_VIDEOFRAMERATE
Definition: matroska.h:111
int64_t end_time_ns
Definition: matroskadec.c:3114
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:139
#define MATROSKA_ID_ATTACHMENTS
Definition: matroska.h:61
static const EbmlSyntax matroska_chapter_display[]
Definition: matroskadec.c:476
#define MATROSKA_ID_TRACKOPERATION
Definition: matroska.h:83
int64_t pos
Definition: matroskadec.c:103
static const EbmlSyntax matroska_blockmore[]
Definition: matroskadec.c:586
#define MATROSKA_ID_CHAPTERDISPLAY
Definition: matroska.h:218
static int flags
Definition: cpu.c:47
static const EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:373
MatroskaLevel1Element level1_elems[64]
Definition: matroskadec.c:303
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:460
int64_t reference
Definition: matroskadec.c:319
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:85
Main libavformat public API header.
uint64_t buf_timecode
Definition: matroskadec.c:155
#define MATROSKA_ID_ENCODINGENCAESSETTINGS
Definition: matroska.h:143
uint64_t num
Definition: matroskadec.c:169
#define MATROSKA_ID_CUETRACK
Definition: matroska.h:159
EbmlType
Definition: matroskadec.c:67
#define MATROSKA_ID_SEEKPOSITION
Definition: matroska.h:185
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
Definition: matroskadec.c:661
#define MATROSKA_ID_CODECDELAY
Definition: matroska.h:94
#define MATROSKA_ID_CHAPTERTIMESTART
Definition: matroska.h:216
double time_scale
Definition: matroskadec.c:176
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:72
void * av_realloc(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:143
char * string
Definition: matroskadec.c:223
static const EbmlSyntax matroska_seekhead[]
Definition: matroskadec.c:564
static double c[64]
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:143
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1509
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:905
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
char * doctype
Definition: matroskadec.c:110
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:206
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:49
int den
denominator
Definition: rational.h:45
#define MATROSKA_ID_ENCODINGSIGNATURE
Definition: matroska.h:149
#define MATROSKA_ID_SEGMENT
Definition: matroska.h:53
uint32_t id
Definition: matroskadec.c:83
unsigned bps
Definition: movenc.c:1334
MatroskaTagTarget target
Definition: matroskadec.c:238
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
The optional settings (rendering instructions) that immediately follow the timestamp specifier of a W...
Definition: avcodec.h:1101
#define MKBETAG(a, b, c, d)
Definition: common.h:316
#define MATROSKA_ID_SEEKHEAD
Definition: matroska.h:60
ASS as defined in Matroska.
Definition: avcodec.h:527
static int matroska_parse_webvtt(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int data_len, uint64_t timecode, uint64_t duration, int64_t pos)
Definition: matroskadec.c:2533
#define EBML_ID_HEADER
Definition: matroska.h:33
void av_codec_set_seek_preroll(AVCodecContext *avctx, int val)
int skip_to_keyframe
Indicates that everything up to the next keyframe should be discarded.
Definition: avformat.h:1086
#define MATROSKA_ID_ENCODINGCOMPRESSION
Definition: matroska.h:138
#define MATROSKA_ID_CLUSTERPREVSIZE
Definition: matroska.h:190
#define av_free(p)
char * value
Definition: dict.h:88
int eof_reached
true if eof reached
Definition: avio.h:139
#define MATROSKA_ID_POINTENTRY
Definition: matroska.h:152
int len
int channels
number of audio channels
Definition: avcodec.h:1986
#define MATROSKA_ID_FILEUID
Definition: matroska.h:211
#define MATROSKA_ID_VIDEOPIXELCROPL
Definition: matroska.h:118
static const EbmlSyntax matroska_index_pos[]
Definition: matroskadec.c:508
void * priv_data
Format private data.
Definition: avformat.h:1300
uint64_t non_simple
Definition: matroskadec.c:320
#define MATROSKA_ID_CHAPTERUID
Definition: matroska.h:225
static const EbmlSyntax matroska_attachment[]
Definition: matroskadec.c:462
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
Definition: matroskadec.c:860
#define MATROSKA_ID_VIDEODISPLAYUNIT
Definition: matroska.h:120
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
Definition: matroskadec.c:776
#define MATROSKA_ID_TRACKMAXBLKADDID
Definition: matroska.h:108
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1161
#define EBML_ID_EBMLMAXSIZELENGTH
Definition: matroska.h:39
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1367
MatroskaTrackEncryption encryption
Definition: matroskadec.c:128
#define MATROSKA_ID_CHAPSTRING
Definition: matroska.h:219
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:553
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:628
#define MATROSKA_ID_TAGSTRING
Definition: matroska.h:169
static const AVOption options[]
Definition: matroskadec.c:3463
const CodecMime ff_mkv_image_mime_tags[]
Definition: matroska.c:102
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:300
static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps, double min_buffer, double *buffer, double *sec_to_download, AVFormatContext *s, int64_t cues_start)
Definition: matroskadec.c:3191
static int ebml_read_float(AVIOContext *pb, int size, double *num)
Definition: matroskadec.c:819
#define MATROSKA_ID_DURATION
Definition: matroska.h:67
uint64_t length
Definition: matroskadec.c:249
static int matroska_aac_profile(char *codec_id)
Definition: matroskadec.c:1550
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:299
int stream_index
Definition: avcodec.h:1164
static const EbmlSyntax matroska_track_encoding_encryption[]
Definition: matroskadec.c:387
#define EBML_ID_DOCTYPEVERSION
Definition: matroska.h:41
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2253
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:884
#define CUES_START
Definition: matroska.h:290
uint8_t bitdepth
Definition: dirac.c:85
#define MKTAG(a, b, c, d)
Definition: common.h:315
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:907