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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 = ((uint64_t)*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 static int is_ebml_id_valid(uint32_t id)
999 {
1000  // Due to endian nonsense in Matroska, the highest byte with any bits set
1001  // will contain the leading length bit. This bit in turn identifies the
1002  // total byte length of the element by its position within the byte.
1003  unsigned int bits = av_log2(id);
1004  return id && (bits + 7) / 8 == (8 - bits % 8);
1005 }
1006 
1007 /*
1008  * Allocate and return the entry for the level1 element with the given ID. If
1009  * an entry already exists, return the existing entry.
1010  */
1012  uint32_t id)
1013 {
1014  int i;
1015  MatroskaLevel1Element *elem;
1016 
1017  if (!is_ebml_id_valid(id))
1018  return NULL;
1019 
1020  // Some files link to all clusters; useless.
1021  if (id == MATROSKA_ID_CLUSTER)
1022  return NULL;
1023 
1024  // There can be multiple seekheads.
1025  if (id != MATROSKA_ID_SEEKHEAD) {
1026  for (i = 0; i < matroska->num_level1_elems; i++) {
1027  if (matroska->level1_elems[i].id == id)
1028  return &matroska->level1_elems[i];
1029  }
1030  }
1031 
1032  // Only a completely broken file would have more elements.
1033  // It also provides a low-effort way to escape from circular seekheads
1034  // (every iteration will add a level1 entry).
1035  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1036  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1037  return NULL;
1038  }
1039 
1040  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1041  *elem = (MatroskaLevel1Element){.id = id};
1042 
1043  return elem;
1044 }
1045 
1047  EbmlSyntax *syntax, void *data)
1048 {
1049  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1050  [EBML_UINT] = 8,
1051  [EBML_FLOAT] = 8,
1052  // max. 16 MB for strings
1053  [EBML_STR] = 0x1000000,
1054  [EBML_UTF8] = 0x1000000,
1055  // max. 256 MB for binary data
1056  [EBML_BIN] = 0x10000000,
1057  // no limits for anything else
1058  };
1059  AVIOContext *pb = matroska->ctx->pb;
1060  uint32_t id = syntax->id;
1061  uint64_t length;
1062  int res;
1063  void *newelem;
1064  MatroskaLevel1Element *level1_elem;
1065 
1066  data = (char *) data + syntax->data_offset;
1067  if (syntax->list_elem_size) {
1068  EbmlList *list = data;
1069  newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1070  if (!newelem)
1071  return AVERROR(ENOMEM);
1072  list->elem = newelem;
1073  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1074  memset(data, 0, syntax->list_elem_size);
1075  list->nb_elem++;
1076  }
1077 
1078  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1079  matroska->current_id = 0;
1080  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1081  return res;
1082  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1083  av_log(matroska->ctx, AV_LOG_ERROR,
1084  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1085  length, max_lengths[syntax->type], syntax->type);
1086  return AVERROR_INVALIDDATA;
1087  }
1088  }
1089 
1090  switch (syntax->type) {
1091  case EBML_UINT:
1092  res = ebml_read_uint(pb, length, data);
1093  break;
1094  case EBML_SINT:
1095  res = ebml_read_sint(pb, length, data);
1096  break;
1097  case EBML_FLOAT:
1098  res = ebml_read_float(pb, length, data);
1099  break;
1100  case EBML_STR:
1101  case EBML_UTF8:
1102  res = ebml_read_ascii(pb, length, data);
1103  break;
1104  case EBML_BIN:
1105  res = ebml_read_binary(pb, length, data);
1106  break;
1107  case EBML_LEVEL1:
1108  case EBML_NEST:
1109  if ((res = ebml_read_master(matroska, length)) < 0)
1110  return res;
1111  if (id == MATROSKA_ID_SEGMENT)
1112  matroska->segment_start = avio_tell(matroska->ctx->pb);
1113  if (id == MATROSKA_ID_CUES)
1114  matroska->cues_parsing_deferred = 0;
1115  if (syntax->type == EBML_LEVEL1 &&
1116  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1117  if (level1_elem->parsed)
1118  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1119  level1_elem->parsed = 1;
1120  }
1121  return ebml_parse_nest(matroska, syntax->def.n, data);
1122  case EBML_PASS:
1123  return ebml_parse_id(matroska, syntax->def.n, id, data);
1124  case EBML_STOP:
1125  return 1;
1126  default:
1127  if (ffio_limit(pb, length) != length)
1128  return AVERROR(EIO);
1129  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1130  }
1131  if (res == AVERROR_INVALIDDATA)
1132  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1133  else if (res == AVERROR(EIO))
1134  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1135  return res;
1136 }
1137 
1138 static void ebml_free(EbmlSyntax *syntax, void *data)
1139 {
1140  int i, j;
1141  for (i = 0; syntax[i].id; i++) {
1142  void *data_off = (char *) data + syntax[i].data_offset;
1143  switch (syntax[i].type) {
1144  case EBML_STR:
1145  case EBML_UTF8:
1146  av_freep(data_off);
1147  break;
1148  case EBML_BIN:
1149  av_freep(&((EbmlBin *) data_off)->data);
1150  break;
1151  case EBML_LEVEL1:
1152  case EBML_NEST:
1153  if (syntax[i].list_elem_size) {
1154  EbmlList *list = data_off;
1155  char *ptr = list->elem;
1156  for (j = 0; j < list->nb_elem;
1157  j++, ptr += syntax[i].list_elem_size)
1158  ebml_free(syntax[i].def.n, ptr);
1159  av_freep(&list->elem);
1160  } else
1161  ebml_free(syntax[i].def.n, data_off);
1162  default:
1163  break;
1164  }
1165  }
1166 }
1167 
1168 /*
1169  * Autodetecting...
1170  */
1172 {
1173  uint64_t total = 0;
1174  int len_mask = 0x80, size = 1, n = 1, i;
1175 
1176  /* EBML header? */
1177  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1178  return 0;
1179 
1180  /* length of header */
1181  total = p->buf[4];
1182  while (size <= 8 && !(total & len_mask)) {
1183  size++;
1184  len_mask >>= 1;
1185  }
1186  if (size > 8)
1187  return 0;
1188  total &= (len_mask - 1);
1189  while (n < size)
1190  total = (total << 8) | p->buf[4 + n++];
1191 
1192  /* Does the probe data contain the whole header? */
1193  if (p->buf_size < 4 + size + total)
1194  return 0;
1195 
1196  /* The header should contain a known document type. For now,
1197  * we don't parse the whole header but simply check for the
1198  * availability of that array of characters inside the header.
1199  * Not fully fool-proof, but good enough. */
1200  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1201  size_t probelen = strlen(matroska_doctypes[i]);
1202  if (total < probelen)
1203  continue;
1204  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1205  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1206  return AVPROBE_SCORE_MAX;
1207  }
1208 
1209  // probably valid EBML header but no recognized doctype
1210  return AVPROBE_SCORE_EXTENSION;
1211 }
1212 
1214  int num)
1215 {
1216  MatroskaTrack *tracks = matroska->tracks.elem;
1217  int i;
1218 
1219  for (i = 0; i < matroska->tracks.nb_elem; i++)
1220  if (tracks[i].num == num)
1221  return &tracks[i];
1222 
1223  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1224  return NULL;
1225 }
1226 
1227 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1228  MatroskaTrack *track)
1229 {
1230  MatroskaTrackEncoding *encodings = track->encodings.elem;
1231  uint8_t *data = *buf;
1232  int isize = *buf_size;
1233  uint8_t *pkt_data = NULL;
1234  uint8_t av_unused *newpktdata;
1235  int pkt_size = isize;
1236  int result = 0;
1237  int olen;
1238 
1239  if (pkt_size >= 10000000U)
1240  return AVERROR_INVALIDDATA;
1241 
1242  switch (encodings[0].compression.algo) {
1244  {
1245  int header_size = encodings[0].compression.settings.size;
1246  uint8_t *header = encodings[0].compression.settings.data;
1247 
1248  if (header_size && !header) {
1249  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1250  return -1;
1251  }
1252 
1253  if (!header_size)
1254  return 0;
1255 
1256  pkt_size = isize + header_size;
1257  pkt_data = av_malloc(pkt_size);
1258  if (!pkt_data)
1259  return AVERROR(ENOMEM);
1260 
1261  memcpy(pkt_data, header, header_size);
1262  memcpy(pkt_data + header_size, data, isize);
1263  break;
1264  }
1265 #if CONFIG_LZO
1267  do {
1268  olen = pkt_size *= 3;
1269  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1270  if (!newpktdata) {
1271  result = AVERROR(ENOMEM);
1272  goto failed;
1273  }
1274  pkt_data = newpktdata;
1275  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1276  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1277  if (result) {
1278  result = AVERROR_INVALIDDATA;
1279  goto failed;
1280  }
1281  pkt_size -= olen;
1282  break;
1283 #endif
1284 #if CONFIG_ZLIB
1286  {
1287  z_stream zstream = { 0 };
1288  if (inflateInit(&zstream) != Z_OK)
1289  return -1;
1290  zstream.next_in = data;
1291  zstream.avail_in = isize;
1292  do {
1293  pkt_size *= 3;
1294  newpktdata = av_realloc(pkt_data, pkt_size);
1295  if (!newpktdata) {
1296  inflateEnd(&zstream);
1297  result = AVERROR(ENOMEM);
1298  goto failed;
1299  }
1300  pkt_data = newpktdata;
1301  zstream.avail_out = pkt_size - zstream.total_out;
1302  zstream.next_out = pkt_data + zstream.total_out;
1303  result = inflate(&zstream, Z_NO_FLUSH);
1304  } while (result == Z_OK && pkt_size < 10000000);
1305  pkt_size = zstream.total_out;
1306  inflateEnd(&zstream);
1307  if (result != Z_STREAM_END) {
1308  if (result == Z_MEM_ERROR)
1309  result = AVERROR(ENOMEM);
1310  else
1311  result = AVERROR_INVALIDDATA;
1312  goto failed;
1313  }
1314  break;
1315  }
1316 #endif
1317 #if CONFIG_BZLIB
1319  {
1320  bz_stream bzstream = { 0 };
1321  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1322  return -1;
1323  bzstream.next_in = data;
1324  bzstream.avail_in = isize;
1325  do {
1326  pkt_size *= 3;
1327  newpktdata = av_realloc(pkt_data, pkt_size);
1328  if (!newpktdata) {
1329  BZ2_bzDecompressEnd(&bzstream);
1330  result = AVERROR(ENOMEM);
1331  goto failed;
1332  }
1333  pkt_data = newpktdata;
1334  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1335  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1336  result = BZ2_bzDecompress(&bzstream);
1337  } while (result == BZ_OK && pkt_size < 10000000);
1338  pkt_size = bzstream.total_out_lo32;
1339  BZ2_bzDecompressEnd(&bzstream);
1340  if (result != BZ_STREAM_END) {
1341  if (result == BZ_MEM_ERROR)
1342  result = AVERROR(ENOMEM);
1343  else
1344  result = AVERROR_INVALIDDATA;
1345  goto failed;
1346  }
1347  break;
1348  }
1349 #endif
1350  default:
1351  return AVERROR_INVALIDDATA;
1352  }
1353 
1354  *buf = pkt_data;
1355  *buf_size = pkt_size;
1356  return 0;
1357 
1358 failed:
1359  av_free(pkt_data);
1360  return result;
1361 }
1362 
1364  AVDictionary **metadata, char *prefix)
1365 {
1366  MatroskaTag *tags = list->elem;
1367  char key[1024];
1368  int i;
1369 
1370  for (i = 0; i < list->nb_elem; i++) {
1371  const char *lang = tags[i].lang &&
1372  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1373 
1374  if (!tags[i].name) {
1375  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1376  continue;
1377  }
1378  if (prefix)
1379  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1380  else
1381  av_strlcpy(key, tags[i].name, sizeof(key));
1382  if (tags[i].def || !lang) {
1383  av_dict_set(metadata, key, tags[i].string, 0);
1384  if (tags[i].sub.nb_elem)
1385  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1386  }
1387  if (lang) {
1388  av_strlcat(key, "-", sizeof(key));
1389  av_strlcat(key, lang, sizeof(key));
1390  av_dict_set(metadata, key, tags[i].string, 0);
1391  if (tags[i].sub.nb_elem)
1392  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1393  }
1394  }
1396 }
1397 
1399 {
1400  MatroskaDemuxContext *matroska = s->priv_data;
1401  MatroskaTags *tags = matroska->tags.elem;
1402  int i, j;
1403 
1404  for (i = 0; i < matroska->tags.nb_elem; i++) {
1405  if (tags[i].target.attachuid) {
1406  MatroskaAttachment *attachment = matroska->attachments.elem;
1407  for (j = 0; j < matroska->attachments.nb_elem; j++)
1408  if (attachment[j].uid == tags[i].target.attachuid &&
1409  attachment[j].stream)
1410  matroska_convert_tag(s, &tags[i].tag,
1411  &attachment[j].stream->metadata, NULL);
1412  } else if (tags[i].target.chapteruid) {
1413  MatroskaChapter *chapter = matroska->chapters.elem;
1414  for (j = 0; j < matroska->chapters.nb_elem; j++)
1415  if (chapter[j].uid == tags[i].target.chapteruid &&
1416  chapter[j].chapter)
1417  matroska_convert_tag(s, &tags[i].tag,
1418  &chapter[j].chapter->metadata, NULL);
1419  } else if (tags[i].target.trackuid) {
1420  MatroskaTrack *track = matroska->tracks.elem;
1421  for (j = 0; j < matroska->tracks.nb_elem; j++)
1422  if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1423  matroska_convert_tag(s, &tags[i].tag,
1424  &track[j].stream->metadata, NULL);
1425  } else {
1426  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1427  tags[i].target.type);
1428  }
1429  }
1430 }
1431 
1433  uint64_t pos)
1434 {
1435  uint32_t level_up = matroska->level_up;
1436  uint32_t saved_id = matroska->current_id;
1437  int64_t before_pos = avio_tell(matroska->ctx->pb);
1439  int64_t offset;
1440  int ret = 0;
1441 
1442  /* seek */
1443  offset = pos + matroska->segment_start;
1444  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1445  /* We don't want to lose our seekhead level, so we add
1446  * a dummy. This is a crude hack. */
1447  if (matroska->num_levels == EBML_MAX_DEPTH) {
1448  av_log(matroska->ctx, AV_LOG_INFO,
1449  "Max EBML element depth (%d) reached, "
1450  "cannot parse further.\n", EBML_MAX_DEPTH);
1451  ret = AVERROR_INVALIDDATA;
1452  } else {
1453  level.start = 0;
1454  level.length = (uint64_t) -1;
1455  matroska->levels[matroska->num_levels] = level;
1456  matroska->num_levels++;
1457  matroska->current_id = 0;
1458 
1459  ret = ebml_parse(matroska, matroska_segment, matroska);
1460 
1461  /* remove dummy level */
1462  while (matroska->num_levels) {
1463  uint64_t length = matroska->levels[--matroska->num_levels].length;
1464  if (length == (uint64_t) -1)
1465  break;
1466  }
1467  }
1468  }
1469  /* seek back */
1470  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1471  matroska->level_up = level_up;
1472  matroska->current_id = saved_id;
1473 
1474  return ret;
1475 }
1476 
1478 {
1479  EbmlList *seekhead_list = &matroska->seekhead;
1480  int i;
1481 
1482  // we should not do any seeking in the streaming case
1483  if (!matroska->ctx->pb->seekable)
1484  return;
1485 
1486  for (i = 0; i < seekhead_list->nb_elem; i++) {
1487  MatroskaSeekhead *seekheads = seekhead_list->elem;
1488  uint32_t id = seekheads[i].id;
1489  uint64_t pos = seekheads[i].pos;
1490 
1491  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1492  if (!elem || elem->parsed)
1493  continue;
1494 
1495  elem->pos = pos;
1496 
1497  // defer cues parsing until we actually need cue data.
1498  if (id == MATROSKA_ID_CUES)
1499  continue;
1500 
1501  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1502  // mark index as broken
1503  matroska->cues_parsing_deferred = -1;
1504  break;
1505  }
1506 
1507  elem->parsed = 1;
1508  }
1509 }
1510 
1512 {
1513  EbmlList *index_list;
1515  uint64_t index_scale = 1;
1516  int i, j;
1517 
1518  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1519  return;
1520 
1521  index_list = &matroska->index;
1522  index = index_list->elem;
1523  if (index_list->nb_elem &&
1524  index[0].time > 1E14 / matroska->time_scale) {
1525  av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1526  index_scale = matroska->time_scale;
1527  }
1528  for (i = 0; i < index_list->nb_elem; i++) {
1529  EbmlList *pos_list = &index[i].pos;
1530  MatroskaIndexPos *pos = pos_list->elem;
1531  for (j = 0; j < pos_list->nb_elem; j++) {
1532  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1533  pos[j].track);
1534  if (track && track->stream)
1535  av_add_index_entry(track->stream,
1536  pos[j].pos + matroska->segment_start,
1537  index[i].time / index_scale, 0, 0,
1539  }
1540  }
1541 }
1542 
1544  int i;
1545 
1546  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1547  return;
1548 
1549  for (i = 0; i < matroska->num_level1_elems; i++) {
1550  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1551  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1552  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1553  matroska->cues_parsing_deferred = -1;
1554  elem->parsed = 1;
1555  break;
1556  }
1557  }
1558 
1559  matroska_add_index_entries(matroska);
1560 }
1561 
1563 {
1564  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1565  int profile;
1566 
1567  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1568  if (strstr(codec_id, aac_profiles[profile]))
1569  break;
1570  return profile + 1;
1571 }
1572 
1573 static int matroska_aac_sri(int samplerate)
1574 {
1575  int sri;
1576 
1577  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1578  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1579  break;
1580  return sri;
1581 }
1582 
1583 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1584 {
1585  char buffer[32];
1586  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1587  time_t creation_time = date_utc / 1000000000 + 978307200;
1588  struct tm tmpbuf, *ptm = gmtime_r(&creation_time, &tmpbuf);
1589  if (!ptm) return;
1590  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1591  av_dict_set(metadata, "creation_time", buffer, 0);
1592 }
1593 
1595  MatroskaTrack *track,
1596  int *offset)
1597 {
1598  AVStream *st = track->stream;
1599  uint8_t *p = track->codec_priv.data;
1600  int size = track->codec_priv.size;
1601 
1602  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1603  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1604  track->codec_priv.size = 0;
1605  return 0;
1606  }
1607  *offset = 8;
1608  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1609 
1610  p += track->codec_priv.size;
1611  size -= track->codec_priv.size;
1612 
1613  /* parse the remaining metadata blocks if present */
1614  while (size >= 4) {
1615  int block_last, block_type, block_size;
1616 
1617  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1618 
1619  p += 4;
1620  size -= 4;
1621  if (block_size > size)
1622  return 0;
1623 
1624  /* check for the channel mask */
1625  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1626  AVDictionary *dict = NULL;
1627  AVDictionaryEntry *chmask;
1628 
1629  ff_vorbis_comment(s, &dict, p, block_size, 0);
1630  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1631  if (chmask) {
1632  uint64_t mask = strtol(chmask->value, NULL, 0);
1633  if (!mask || mask & ~0x3ffffULL) {
1635  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1636  } else
1637  st->codec->channel_layout = mask;
1638  }
1639  av_dict_free(&dict);
1640  }
1641 
1642  p += block_size;
1643  size -= block_size;
1644  }
1645 
1646  return 0;
1647 }
1648 
1650 {
1651  MatroskaDemuxContext *matroska = s->priv_data;
1652  MatroskaTrack *tracks = matroska->tracks.elem;
1653  AVStream *st;
1654  int i, j, ret;
1655  int k;
1656 
1657  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1658  MatroskaTrack *track = &tracks[i];
1660  EbmlList *encodings_list = &track->encodings;
1661  MatroskaTrackEncoding *encodings = encodings_list->elem;
1662  uint8_t *extradata = NULL;
1663  int extradata_size = 0;
1664  int extradata_offset = 0;
1665  uint32_t fourcc = 0;
1666  AVIOContext b;
1667  char* key_id_base64 = NULL;
1668  int bit_depth = -1;
1669 
1670  /* Apply some sanity checks. */
1671  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1672  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1673  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1674  track->type != MATROSKA_TRACK_TYPE_METADATA) {
1675  av_log(matroska->ctx, AV_LOG_INFO,
1676  "Unknown or unsupported track type %"PRIu64"\n",
1677  track->type);
1678  continue;
1679  }
1680  if (!track->codec_id)
1681  continue;
1682 
1683  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
1684  isnan(track->audio.samplerate)) {
1685  av_log(matroska->ctx, AV_LOG_WARNING,
1686  "Invalid sample rate %f, defaulting to 8000 instead.\n",
1687  track->audio.samplerate);
1688  track->audio.samplerate = 8000;
1689  }
1690 
1691  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1692  if (!track->default_duration && track->video.frame_rate > 0)
1693  track->default_duration = 1000000000 / track->video.frame_rate;
1694  if (track->video.display_width == -1)
1695  track->video.display_width = track->video.pixel_width;
1696  if (track->video.display_height == -1)
1697  track->video.display_height = track->video.pixel_height;
1698  if (track->video.color_space.size == 4)
1699  fourcc = AV_RL32(track->video.color_space.data);
1700  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1701  if (!track->audio.out_samplerate)
1702  track->audio.out_samplerate = track->audio.samplerate;
1703  }
1704  if (encodings_list->nb_elem > 1) {
1705  av_log(matroska->ctx, AV_LOG_ERROR,
1706  "Multiple combined encodings not supported");
1707  } else if (encodings_list->nb_elem == 1) {
1708  if (encodings[0].type) {
1709  if (encodings[0].encryption.key_id.size > 0) {
1710  /* Save the encryption key id to be stored later as a
1711  metadata tag. */
1712  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1713  key_id_base64 = av_malloc(b64_size);
1714  if (key_id_base64 == NULL)
1715  return AVERROR(ENOMEM);
1716 
1717  av_base64_encode(key_id_base64, b64_size,
1718  encodings[0].encryption.key_id.data,
1719  encodings[0].encryption.key_id.size);
1720  } else {
1721  encodings[0].scope = 0;
1722  av_log(matroska->ctx, AV_LOG_ERROR,
1723  "Unsupported encoding type");
1724  }
1725  } else if (
1726 #if CONFIG_ZLIB
1727  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1728 #endif
1729 #if CONFIG_BZLIB
1731 #endif
1732 #if CONFIG_LZO
1734 #endif
1736  encodings[0].scope = 0;
1737  av_log(matroska->ctx, AV_LOG_ERROR,
1738  "Unsupported encoding type");
1739  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1740  uint8_t *codec_priv = track->codec_priv.data;
1741  int ret = matroska_decode_buffer(&track->codec_priv.data,
1742  &track->codec_priv.size,
1743  track);
1744  if (ret < 0) {
1745  track->codec_priv.data = NULL;
1746  track->codec_priv.size = 0;
1747  av_log(matroska->ctx, AV_LOG_ERROR,
1748  "Failed to decode codec private data\n");
1749  }
1750 
1751  if (codec_priv != track->codec_priv.data)
1752  av_free(codec_priv);
1753  }
1754  }
1755 
1756  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1757  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1758  strlen(ff_mkv_codec_tags[j].str))) {
1759  codec_id = ff_mkv_codec_tags[j].id;
1760  break;
1761  }
1762  }
1763 
1764  st = track->stream = avformat_new_stream(s, NULL);
1765  if (!st) {
1766  av_free(key_id_base64);
1767  return AVERROR(ENOMEM);
1768  }
1769 
1770  if (key_id_base64) {
1771  /* export encryption key id as base64 metadata tag */
1772  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
1773  av_freep(&key_id_base64);
1774  }
1775 
1776  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1777  track->codec_priv.size >= 40 &&
1778  track->codec_priv.data) {
1779  track->ms_compat = 1;
1780  bit_depth = AV_RL16(track->codec_priv.data + 14);
1781  fourcc = AV_RL32(track->codec_priv.data + 16);
1783  fourcc);
1784  if (!codec_id)
1786  fourcc);
1787  extradata_offset = 40;
1788  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1789  track->codec_priv.size >= 14 &&
1790  track->codec_priv.data) {
1791  int ret;
1792  ffio_init_context(&b, track->codec_priv.data,
1793  track->codec_priv.size,
1794  0, NULL, NULL, NULL, NULL);
1795  ret = ff_get_wav_header(s, &b, st->codec, track->codec_priv.size, 0);
1796  if (ret < 0)
1797  return ret;
1798  codec_id = st->codec->codec_id;
1799  extradata_offset = FFMIN(track->codec_priv.size, 18);
1800  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
1801  && (track->codec_priv.size >= 86)
1802  && (track->codec_priv.data)) {
1803  fourcc = AV_RL32(track->codec_priv.data + 4);
1804  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1806  fourcc = AV_RL32(track->codec_priv.data);
1807  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1808  }
1809  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1810  (track->codec_priv.size >= 21) &&
1811  (track->codec_priv.data)) {
1812  fourcc = AV_RL32(track->codec_priv.data + 4);
1813  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1815  fourcc = AV_RL32(track->codec_priv.data);
1816  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1817  }
1818  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI "))
1819  codec_id = AV_CODEC_ID_SVQ3;
1820  if (codec_id == AV_CODEC_ID_NONE) {
1821  char buf[32];
1822  av_get_codec_tag_string(buf, sizeof(buf), fourcc);
1823  av_log(matroska->ctx, AV_LOG_ERROR,
1824  "mov FourCC not found %s.\n", buf);
1825  }
1826  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1827  switch (track->audio.bitdepth) {
1828  case 8:
1829  codec_id = AV_CODEC_ID_PCM_U8;
1830  break;
1831  case 24:
1832  codec_id = AV_CODEC_ID_PCM_S24BE;
1833  break;
1834  case 32:
1835  codec_id = AV_CODEC_ID_PCM_S32BE;
1836  break;
1837  }
1838  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1839  switch (track->audio.bitdepth) {
1840  case 8:
1841  codec_id = AV_CODEC_ID_PCM_U8;
1842  break;
1843  case 24:
1844  codec_id = AV_CODEC_ID_PCM_S24LE;
1845  break;
1846  case 32:
1847  codec_id = AV_CODEC_ID_PCM_S32LE;
1848  break;
1849  }
1850  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1851  track->audio.bitdepth == 64) {
1852  codec_id = AV_CODEC_ID_PCM_F64LE;
1853  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1854  int profile = matroska_aac_profile(track->codec_id);
1855  int sri = matroska_aac_sri(track->audio.samplerate);
1856  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
1857  if (!extradata)
1858  return AVERROR(ENOMEM);
1859  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1860  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1861  if (strstr(track->codec_id, "SBR")) {
1862  sri = matroska_aac_sri(track->audio.out_samplerate);
1863  extradata[2] = 0x56;
1864  extradata[3] = 0xE5;
1865  extradata[4] = 0x80 | (sri << 3);
1866  extradata_size = 5;
1867  } else
1868  extradata_size = 2;
1869  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
1870  /* Only ALAC's magic cookie is stored in Matroska's track headers.
1871  * Create the "atom size", "tag", and "tag version" fields the
1872  * decoder expects manually. */
1873  extradata_size = 12 + track->codec_priv.size;
1874  extradata = av_mallocz(extradata_size +
1876  if (!extradata)
1877  return AVERROR(ENOMEM);
1878  AV_WB32(extradata, extradata_size);
1879  memcpy(&extradata[4], "alac", 4);
1880  AV_WB32(&extradata[8], 0);
1881  memcpy(&extradata[12], track->codec_priv.data,
1882  track->codec_priv.size);
1883  } else if (codec_id == AV_CODEC_ID_TTA) {
1884  extradata_size = 30;
1885  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
1886  if (!extradata)
1887  return AVERROR(ENOMEM);
1888  ffio_init_context(&b, extradata, extradata_size, 1,
1889  NULL, NULL, NULL, NULL);
1890  avio_write(&b, "TTA1", 4);
1891  avio_wl16(&b, 1);
1892  if (track->audio.channels > UINT16_MAX ||
1893  track->audio.bitdepth > UINT16_MAX) {
1894  av_log(matroska->ctx, AV_LOG_WARNING,
1895  "Too large audio channel number %"PRIu64
1896  " or bitdepth %"PRIu64". Skipping track.\n",
1897  track->audio.channels, track->audio.bitdepth);
1898  av_freep(&extradata);
1899  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
1900  return AVERROR_INVALIDDATA;
1901  else
1902  continue;
1903  }
1904  avio_wl16(&b, track->audio.channels);
1905  avio_wl16(&b, track->audio.bitdepth);
1906  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
1907  return AVERROR_INVALIDDATA;
1908  avio_wl32(&b, track->audio.out_samplerate);
1909  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
1910  track->audio.out_samplerate,
1911  AV_TIME_BASE * 1000));
1912  } else if (codec_id == AV_CODEC_ID_RV10 ||
1913  codec_id == AV_CODEC_ID_RV20 ||
1914  codec_id == AV_CODEC_ID_RV30 ||
1915  codec_id == AV_CODEC_ID_RV40) {
1916  extradata_offset = 26;
1917  } else if (codec_id == AV_CODEC_ID_RA_144) {
1918  track->audio.out_samplerate = 8000;
1919  track->audio.channels = 1;
1920  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
1921  codec_id == AV_CODEC_ID_COOK ||
1922  codec_id == AV_CODEC_ID_ATRAC3 ||
1923  codec_id == AV_CODEC_ID_SIPR)
1924  && track->codec_priv.data) {
1925  int flavor;
1926 
1927  ffio_init_context(&b, track->codec_priv.data,
1928  track->codec_priv.size,
1929  0, NULL, NULL, NULL, NULL);
1930  avio_skip(&b, 22);
1931  flavor = avio_rb16(&b);
1932  track->audio.coded_framesize = avio_rb32(&b);
1933  avio_skip(&b, 12);
1934  track->audio.sub_packet_h = avio_rb16(&b);
1935  track->audio.frame_size = avio_rb16(&b);
1936  track->audio.sub_packet_size = avio_rb16(&b);
1937  if (flavor < 0 ||
1938  track->audio.coded_framesize <= 0 ||
1939  track->audio.sub_packet_h <= 0 ||
1940  track->audio.frame_size <= 0 ||
1941  track->audio.sub_packet_size <= 0)
1942  return AVERROR_INVALIDDATA;
1943  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
1944  track->audio.frame_size);
1945  if (!track->audio.buf)
1946  return AVERROR(ENOMEM);
1947  if (codec_id == AV_CODEC_ID_RA_288) {
1948  st->codec->block_align = track->audio.coded_framesize;
1949  track->codec_priv.size = 0;
1950  } else {
1951  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1952  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1953  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1954  st->codec->bit_rate = sipr_bit_rate[flavor];
1955  }
1956  st->codec->block_align = track->audio.sub_packet_size;
1957  extradata_offset = 78;
1958  }
1959  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1960  ret = matroska_parse_flac(s, track, &extradata_offset);
1961  if (ret < 0)
1962  return ret;
1963  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
1964  fourcc = AV_RL32(track->codec_priv.data);
1965  }
1966  track->codec_priv.size -= extradata_offset;
1967 
1968  if (codec_id == AV_CODEC_ID_NONE)
1969  av_log(matroska->ctx, AV_LOG_INFO,
1970  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1971 
1972  if (track->time_scale < 0.01)
1973  track->time_scale = 1.0;
1974  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1975  1000 * 1000 * 1000); /* 64 bit pts in ns */
1976 
1977  /* convert the delay from ns to the track timebase */
1978  track->codec_delay = av_rescale_q(track->codec_delay,
1979  (AVRational){ 1, 1000000000 },
1980  st->time_base);
1981 
1982  st->codec->codec_id = codec_id;
1983 
1984  if (strcmp(track->language, "und"))
1985  av_dict_set(&st->metadata, "language", track->language, 0);
1986  av_dict_set(&st->metadata, "title", track->name, 0);
1987 
1988  if (track->flag_default)
1990  if (track->flag_forced)
1992 
1993  if (!st->codec->extradata) {
1994  if (extradata) {
1995  st->codec->extradata = extradata;
1996  st->codec->extradata_size = extradata_size;
1997  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1998  if (ff_alloc_extradata(st->codec, track->codec_priv.size))
1999  return AVERROR(ENOMEM);
2000  memcpy(st->codec->extradata,
2001  track->codec_priv.data + extradata_offset,
2002  track->codec_priv.size);
2003  }
2004  }
2005 
2006  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2007  MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2008 
2010  st->codec->codec_tag = fourcc;
2011  if (bit_depth >= 0)
2013  st->codec->width = track->video.pixel_width;
2014  st->codec->height = track->video.pixel_height;
2016  &st->sample_aspect_ratio.den,
2017  st->codec->height * track->video.display_width,
2018  st->codec->width * track->video.display_height,
2019  255);
2020  if (st->codec->codec_id != AV_CODEC_ID_HEVC)
2022 
2023  if (track->default_duration) {
2025  1000000000, track->default_duration, 30000);
2026 #if FF_API_R_FRAME_RATE
2027  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2028  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2029  st->r_frame_rate = st->avg_frame_rate;
2030 #endif
2031  }
2032 
2033  /* export stereo mode flag as metadata tag */
2034  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2035  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2036 
2037  /* export alpha mode flag as metadata tag */
2038  if (track->video.alpha_mode)
2039  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2040 
2041  /* if we have virtual track, mark the real tracks */
2042  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2043  char buf[32];
2044  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2045  continue;
2046  snprintf(buf, sizeof(buf), "%s_%d",
2047  ff_matroska_video_stereo_plane[planes[j].type], i);
2048  for (k=0; k < matroska->tracks.nb_elem; k++)
2049  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2050  av_dict_set(&tracks[k].stream->metadata,
2051  "stereo_mode", buf, 0);
2052  break;
2053  }
2054  }
2055  // add stream level stereo3d side data if it is a supported format
2056  if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2057  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2058  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2059  if (ret < 0)
2060  return ret;
2061  }
2062  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2064  st->codec->sample_rate = track->audio.out_samplerate;
2065  st->codec->channels = track->audio.channels;
2066  if (!st->codec->bits_per_coded_sample)
2067  st->codec->bits_per_coded_sample = track->audio.bitdepth;
2068  if (st->codec->codec_id == AV_CODEC_ID_MP3)
2070  else if (st->codec->codec_id != AV_CODEC_ID_AAC)
2072  if (track->codec_delay > 0) {
2073  st->codec->delay = av_rescale_q(track->codec_delay,
2074  st->time_base,
2075  (AVRational){1, st->codec->sample_rate});
2076  }
2077  if (track->seek_preroll > 0) {
2079  av_rescale_q(track->seek_preroll,
2080  (AVRational){1, 1000000000},
2081  (AVRational){1, st->codec->sample_rate}));
2082  }
2083  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2084  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2085 
2086  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2087  st->disposition |= AV_DISPOSITION_CAPTIONS;
2088  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2089  st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2090  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2091  st->disposition |= AV_DISPOSITION_METADATA;
2092  }
2093  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2094  st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
2095  if (st->codec->codec_id == AV_CODEC_ID_ASS)
2096  matroska->contains_ssa = 1;
2097  }
2098  }
2099 
2100  return 0;
2101 }
2102 
2104 {
2105  MatroskaDemuxContext *matroska = s->priv_data;
2106  EbmlList *attachments_list = &matroska->attachments;
2107  EbmlList *chapters_list = &matroska->chapters;
2108  MatroskaAttachment *attachments;
2109  MatroskaChapter *chapters;
2110  uint64_t max_start = 0;
2111  int64_t pos;
2112  Ebml ebml = { 0 };
2113  int i, j, res;
2114 
2115  matroska->ctx = s;
2116  matroska->cues_parsing_deferred = 1;
2117 
2118  /* First read the EBML header. */
2119  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2120  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2121  ebml_free(ebml_syntax, &ebml);
2122  return AVERROR_INVALIDDATA;
2123  }
2124  if (ebml.version > EBML_VERSION ||
2125  ebml.max_size > sizeof(uint64_t) ||
2126  ebml.id_length > sizeof(uint32_t) ||
2127  ebml.doctype_version > 3) {
2128  av_log(matroska->ctx, AV_LOG_ERROR,
2129  "EBML header using unsupported features\n"
2130  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2131  ebml.version, ebml.doctype, ebml.doctype_version);
2132  ebml_free(ebml_syntax, &ebml);
2133  return AVERROR_PATCHWELCOME;
2134  } else if (ebml.doctype_version == 3) {
2135  av_log(matroska->ctx, AV_LOG_WARNING,
2136  "EBML header using unsupported features\n"
2137  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2138  ebml.version, ebml.doctype, ebml.doctype_version);
2139  }
2140  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2141  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2142  break;
2143  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2144  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2145  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2146  ebml_free(ebml_syntax, &ebml);
2147  return AVERROR_INVALIDDATA;
2148  }
2149  }
2150  ebml_free(ebml_syntax, &ebml);
2151 
2152  /* The next thing is a segment. */
2153  pos = avio_tell(matroska->ctx->pb);
2154  res = ebml_parse(matroska, matroska_segments, matroska);
2155  // try resyncing until we find a EBML_STOP type element.
2156  while (res != 1) {
2157  res = matroska_resync(matroska, pos);
2158  if (res < 0)
2159  return res;
2160  pos = avio_tell(matroska->ctx->pb);
2161  res = ebml_parse(matroska, matroska_segment, matroska);
2162  }
2163  matroska_execute_seekhead(matroska);
2164 
2165  if (!matroska->time_scale)
2166  matroska->time_scale = 1000000;
2167  if (matroska->duration)
2168  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2169  1000 / AV_TIME_BASE;
2170  av_dict_set(&s->metadata, "title", matroska->title, 0);
2171  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2172 
2173  if (matroska->date_utc.size == 8)
2175 
2176  res = matroska_parse_tracks(s);
2177  if (res < 0)
2178  return res;
2179 
2180  attachments = attachments_list->elem;
2181  for (j = 0; j < attachments_list->nb_elem; j++) {
2182  if (!(attachments[j].filename && attachments[j].mime &&
2183  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2184  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2185  } else {
2186  AVStream *st = avformat_new_stream(s, NULL);
2187  if (!st)
2188  break;
2189  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2190  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2192 
2193  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2194  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2195  strlen(ff_mkv_image_mime_tags[i].str))) {
2197  break;
2198  }
2199  }
2200 
2201  attachments[j].stream = st;
2202 
2203  if (st->codec->codec_id != AV_CODEC_ID_NONE) {
2206 
2208  if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2209  return res;
2210  memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2211  st->attached_pic.stream_index = st->index;
2213  } else {
2215  if (ff_alloc_extradata(st->codec, attachments[j].bin.size))
2216  break;
2217  memcpy(st->codec->extradata, attachments[j].bin.data,
2218  attachments[j].bin.size);
2219 
2220  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2221  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2222  strlen(ff_mkv_mime_tags[i].str))) {
2223  st->codec->codec_id = ff_mkv_mime_tags[i].id;
2224  break;
2225  }
2226  }
2227  }
2228  }
2229  }
2230 
2231  chapters = chapters_list->elem;
2232  for (i = 0; i < chapters_list->nb_elem; i++)
2233  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2234  (max_start == 0 || chapters[i].start > max_start)) {
2235  chapters[i].chapter =
2236  avpriv_new_chapter(s, chapters[i].uid,
2237  (AVRational) { 1, 1000000000 },
2238  chapters[i].start, chapters[i].end,
2239  chapters[i].title);
2240  if (chapters[i].chapter) {
2241  av_dict_set(&chapters[i].chapter->metadata,
2242  "title", chapters[i].title, 0);
2243  }
2244  max_start = chapters[i].start;
2245  }
2246 
2247  matroska_add_index_entries(matroska);
2248 
2250 
2251  return 0;
2252 }
2253 
2254 /*
2255  * Put one packet in an application-supplied AVPacket struct.
2256  * Returns 0 on success or -1 on failure.
2257  */
2259  AVPacket *pkt)
2260 {
2261  if (matroska->num_packets > 0) {
2262  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2263  av_freep(&matroska->packets[0]);
2264  if (matroska->num_packets > 1) {
2265  void *newpackets;
2266  memmove(&matroska->packets[0], &matroska->packets[1],
2267  (matroska->num_packets - 1) * sizeof(AVPacket *));
2268  newpackets = av_realloc(matroska->packets,
2269  (matroska->num_packets - 1) *
2270  sizeof(AVPacket *));
2271  if (newpackets)
2272  matroska->packets = newpackets;
2273  } else {
2274  av_freep(&matroska->packets);
2275  matroska->prev_pkt = NULL;
2276  }
2277  matroska->num_packets--;
2278  return 0;
2279  }
2280 
2281  return -1;
2282 }
2283 
2284 /*
2285  * Free all packets in our internal queue.
2286  */
2288 {
2289  matroska->prev_pkt = NULL;
2290  if (matroska->packets) {
2291  int n;
2292  for (n = 0; n < matroska->num_packets; n++) {
2293  av_free_packet(matroska->packets[n]);
2294  av_freep(&matroska->packets[n]);
2295  }
2296  av_freep(&matroska->packets);
2297  matroska->num_packets = 0;
2298  }
2299 }
2300 
2302  int *buf_size, int type,
2303  uint32_t **lace_buf, int *laces)
2304 {
2305  int res = 0, n, size = *buf_size;
2306  uint8_t *data = *buf;
2307  uint32_t *lace_size;
2308 
2309  if (!type) {
2310  *laces = 1;
2311  *lace_buf = av_mallocz(sizeof(int));
2312  if (!*lace_buf)
2313  return AVERROR(ENOMEM);
2314 
2315  *lace_buf[0] = size;
2316  return 0;
2317  }
2318 
2319  av_assert0(size > 0);
2320  *laces = *data + 1;
2321  data += 1;
2322  size -= 1;
2323  lace_size = av_mallocz(*laces * sizeof(int));
2324  if (!lace_size)
2325  return AVERROR(ENOMEM);
2326 
2327  switch (type) {
2328  case 0x1: /* Xiph lacing */
2329  {
2330  uint8_t temp;
2331  uint32_t total = 0;
2332  for (n = 0; res == 0 && n < *laces - 1; n++) {
2333  while (1) {
2334  if (size <= total) {
2335  res = AVERROR_INVALIDDATA;
2336  break;
2337  }
2338  temp = *data;
2339  total += temp;
2340  lace_size[n] += temp;
2341  data += 1;
2342  size -= 1;
2343  if (temp != 0xff)
2344  break;
2345  }
2346  }
2347  if (size <= total) {
2348  res = AVERROR_INVALIDDATA;
2349  break;
2350  }
2351 
2352  lace_size[n] = size - total;
2353  break;
2354  }
2355 
2356  case 0x2: /* fixed-size lacing */
2357  if (size % (*laces)) {
2358  res = AVERROR_INVALIDDATA;
2359  break;
2360  }
2361  for (n = 0; n < *laces; n++)
2362  lace_size[n] = size / *laces;
2363  break;
2364 
2365  case 0x3: /* EBML lacing */
2366  {
2367  uint64_t num;
2368  uint64_t total;
2369  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2370  if (n < 0 || num > INT_MAX) {
2371  av_log(matroska->ctx, AV_LOG_INFO,
2372  "EBML block data error\n");
2373  res = n<0 ? n : AVERROR_INVALIDDATA;
2374  break;
2375  }
2376  data += n;
2377  size -= n;
2378  total = lace_size[0] = num;
2379  for (n = 1; res == 0 && n < *laces - 1; n++) {
2380  int64_t snum;
2381  int r;
2382  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2383  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2384  av_log(matroska->ctx, AV_LOG_INFO,
2385  "EBML block data error\n");
2386  res = r<0 ? r : AVERROR_INVALIDDATA;
2387  break;
2388  }
2389  data += r;
2390  size -= r;
2391  lace_size[n] = lace_size[n - 1] + snum;
2392  total += lace_size[n];
2393  }
2394  if (size <= total) {
2395  res = AVERROR_INVALIDDATA;
2396  break;
2397  }
2398  lace_size[*laces - 1] = size - total;
2399  break;
2400  }
2401  }
2402 
2403  *buf = data;
2404  *lace_buf = lace_size;
2405  *buf_size = size;
2406 
2407  return res;
2408 }
2409 
2411  MatroskaTrack *track, AVStream *st,
2412  uint8_t *data, int size, uint64_t timecode,
2413  int64_t pos)
2414 {
2415  int a = st->codec->block_align;
2416  int sps = track->audio.sub_packet_size;
2417  int cfs = track->audio.coded_framesize;
2418  int h = track->audio.sub_packet_h;
2419  int y = track->audio.sub_packet_cnt;
2420  int w = track->audio.frame_size;
2421  int x;
2422 
2423  if (!track->audio.pkt_cnt) {
2424  if (track->audio.sub_packet_cnt == 0)
2425  track->audio.buf_timecode = timecode;
2426  if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2427  if (size < cfs * h / 2) {
2428  av_log(matroska->ctx, AV_LOG_ERROR,
2429  "Corrupt int4 RM-style audio packet size\n");
2430  return AVERROR_INVALIDDATA;
2431  }
2432  for (x = 0; x < h / 2; x++)
2433  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2434  data + x * cfs, cfs);
2435  } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2436  if (size < w) {
2437  av_log(matroska->ctx, AV_LOG_ERROR,
2438  "Corrupt sipr RM-style audio packet size\n");
2439  return AVERROR_INVALIDDATA;
2440  }
2441  memcpy(track->audio.buf + y * w, data, w);
2442  } else {
2443  if (size < sps * w / sps || h<=0 || w%sps) {
2444  av_log(matroska->ctx, AV_LOG_ERROR,
2445  "Corrupt generic RM-style audio packet size\n");
2446  return AVERROR_INVALIDDATA;
2447  }
2448  for (x = 0; x < w / sps; x++)
2449  memcpy(track->audio.buf +
2450  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2451  data + x * sps, sps);
2452  }
2453 
2454  if (++track->audio.sub_packet_cnt >= h) {
2455  if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2456  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2457  track->audio.sub_packet_cnt = 0;
2458  track->audio.pkt_cnt = h * w / a;
2459  }
2460  }
2461 
2462  while (track->audio.pkt_cnt) {
2463  int ret;
2464  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2465  if (!pkt)
2466  return AVERROR(ENOMEM);
2467 
2468  ret = av_new_packet(pkt, a);
2469  if (ret < 0) {
2470  av_free(pkt);
2471  return ret;
2472  }
2473  memcpy(pkt->data,
2474  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2475  a);
2476  pkt->pts = track->audio.buf_timecode;
2478  pkt->pos = pos;
2479  pkt->stream_index = st->index;
2480  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2481  }
2482 
2483  return 0;
2484 }
2485 
2486 /* reconstruct full wavpack blocks from mangled matroska ones */
2488  uint8_t **pdst, int *size)
2489 {
2490  uint8_t *dst = NULL;
2491  int dstlen = 0;
2492  int srclen = *size;
2493  uint32_t samples;
2494  uint16_t ver;
2495  int ret, offset = 0;
2496 
2497  if (srclen < 12 || track->stream->codec->extradata_size < 2)
2498  return AVERROR_INVALIDDATA;
2499 
2500  ver = AV_RL16(track->stream->codec->extradata);
2501 
2502  samples = AV_RL32(src);
2503  src += 4;
2504  srclen -= 4;
2505 
2506  while (srclen >= 8) {
2507  int multiblock;
2508  uint32_t blocksize;
2509  uint8_t *tmp;
2510 
2511  uint32_t flags = AV_RL32(src);
2512  uint32_t crc = AV_RL32(src + 4);
2513  src += 8;
2514  srclen -= 8;
2515 
2516  multiblock = (flags & 0x1800) != 0x1800;
2517  if (multiblock) {
2518  if (srclen < 4) {
2519  ret = AVERROR_INVALIDDATA;
2520  goto fail;
2521  }
2522  blocksize = AV_RL32(src);
2523  src += 4;
2524  srclen -= 4;
2525  } else
2526  blocksize = srclen;
2527 
2528  if (blocksize > srclen) {
2529  ret = AVERROR_INVALIDDATA;
2530  goto fail;
2531  }
2532 
2533  tmp = av_realloc(dst, dstlen + blocksize + 32);
2534  if (!tmp) {
2535  ret = AVERROR(ENOMEM);
2536  goto fail;
2537  }
2538  dst = tmp;
2539  dstlen += blocksize + 32;
2540 
2541  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2542  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2543  AV_WL16(dst + offset + 8, ver); // version
2544  AV_WL16(dst + offset + 10, 0); // track/index_no
2545  AV_WL32(dst + offset + 12, 0); // total samples
2546  AV_WL32(dst + offset + 16, 0); // block index
2547  AV_WL32(dst + offset + 20, samples); // number of samples
2548  AV_WL32(dst + offset + 24, flags); // flags
2549  AV_WL32(dst + offset + 28, crc); // crc
2550  memcpy(dst + offset + 32, src, blocksize); // block data
2551 
2552  src += blocksize;
2553  srclen -= blocksize;
2554  offset += blocksize + 32;
2555  }
2556 
2557  *pdst = dst;
2558  *size = dstlen;
2559 
2560  return 0;
2561 
2562 fail:
2563  av_freep(&dst);
2564  return ret;
2565 }
2566 
2568  MatroskaTrack *track,
2569  AVStream *st,
2570  uint8_t *data, int data_len,
2571  uint64_t timecode,
2572  uint64_t duration,
2573  int64_t pos)
2574 {
2575  AVPacket *pkt;
2576  uint8_t *id, *settings, *text, *buf;
2577  int id_len, settings_len, text_len;
2578  uint8_t *p, *q;
2579  int err;
2580 
2581  if (data_len <= 0)
2582  return AVERROR_INVALIDDATA;
2583 
2584  p = data;
2585  q = data + data_len;
2586 
2587  id = p;
2588  id_len = -1;
2589  while (p < q) {
2590  if (*p == '\r' || *p == '\n') {
2591  id_len = p - id;
2592  if (*p == '\r')
2593  p++;
2594  break;
2595  }
2596  p++;
2597  }
2598 
2599  if (p >= q || *p != '\n')
2600  return AVERROR_INVALIDDATA;
2601  p++;
2602 
2603  settings = p;
2604  settings_len = -1;
2605  while (p < q) {
2606  if (*p == '\r' || *p == '\n') {
2607  settings_len = p - settings;
2608  if (*p == '\r')
2609  p++;
2610  break;
2611  }
2612  p++;
2613  }
2614 
2615  if (p >= q || *p != '\n')
2616  return AVERROR_INVALIDDATA;
2617  p++;
2618 
2619  text = p;
2620  text_len = q - p;
2621  while (text_len > 0) {
2622  const int len = text_len - 1;
2623  const uint8_t c = p[len];
2624  if (c != '\r' && c != '\n')
2625  break;
2626  text_len = len;
2627  }
2628 
2629  if (text_len <= 0)
2630  return AVERROR_INVALIDDATA;
2631 
2632  pkt = av_mallocz(sizeof(*pkt));
2633  if (!pkt)
2634  return AVERROR(ENOMEM);
2635  err = av_new_packet(pkt, text_len);
2636  if (err < 0) {
2637  av_free(pkt);
2638  return AVERROR(err);
2639  }
2640 
2641  memcpy(pkt->data, text, text_len);
2642 
2643  if (id_len > 0) {
2644  buf = av_packet_new_side_data(pkt,
2646  id_len);
2647  if (!buf) {
2648  av_free(pkt);
2649  return AVERROR(ENOMEM);
2650  }
2651  memcpy(buf, id, id_len);
2652  }
2653 
2654  if (settings_len > 0) {
2655  buf = av_packet_new_side_data(pkt,
2657  settings_len);
2658  if (!buf) {
2659  av_free(pkt);
2660  return AVERROR(ENOMEM);
2661  }
2662  memcpy(buf, settings, settings_len);
2663  }
2664 
2665  // Do we need this for subtitles?
2666  // pkt->flags = AV_PKT_FLAG_KEY;
2667 
2668  pkt->stream_index = st->index;
2669  pkt->pts = timecode;
2670 
2671  // Do we need this for subtitles?
2672  // pkt->dts = timecode;
2673 
2674  pkt->duration = duration;
2675  pkt->pos = pos;
2676 
2677  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2678  matroska->prev_pkt = pkt;
2679 
2680  return 0;
2681 }
2682 
2684  MatroskaTrack *track, AVStream *st,
2685  uint8_t *data, int pkt_size,
2686  uint64_t timecode, uint64_t lace_duration,
2687  int64_t pos, int is_keyframe,
2688  uint8_t *additional, uint64_t additional_id, int additional_size,
2689  int64_t discard_padding)
2690 {
2691  MatroskaTrackEncoding *encodings = track->encodings.elem;
2692  uint8_t *pkt_data = data;
2693  int offset = 0, res;
2694  AVPacket *pkt;
2695 
2696  if (encodings && !encodings->type && encodings->scope & 1) {
2697  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2698  if (res < 0)
2699  return res;
2700  }
2701 
2702  if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2703  uint8_t *wv_data;
2704  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2705  if (res < 0) {
2706  av_log(matroska->ctx, AV_LOG_ERROR,
2707  "Error parsing a wavpack block.\n");
2708  goto fail;
2709  }
2710  if (pkt_data != data)
2711  av_freep(&pkt_data);
2712  pkt_data = wv_data;
2713  }
2714 
2715  if (st->codec->codec_id == AV_CODEC_ID_PRORES &&
2716  AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
2717  offset = 8;
2718 
2719  pkt = av_mallocz(sizeof(AVPacket));
2720  if (!pkt) {
2721  if (pkt_data != data)
2722  av_freep(&pkt_data);
2723  return AVERROR(ENOMEM);
2724  }
2725  /* XXX: prevent data copy... */
2726  if (av_new_packet(pkt, pkt_size + offset) < 0) {
2727  av_free(pkt);
2728  res = AVERROR(ENOMEM);
2729  goto fail;
2730  }
2731 
2732  if (st->codec->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
2733  uint8_t *buf = pkt->data;
2734  bytestream_put_be32(&buf, pkt_size);
2735  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2736  }
2737 
2738  memcpy(pkt->data + offset, pkt_data, pkt_size);
2739 
2740  if (pkt_data != data)
2741  av_freep(&pkt_data);
2742 
2743  pkt->flags = is_keyframe;
2744  pkt->stream_index = st->index;
2745 
2746  if (additional_size > 0) {
2747  uint8_t *side_data = av_packet_new_side_data(pkt,
2749  additional_size + 8);
2750  if (!side_data) {
2751  av_free_packet(pkt);
2752  av_free(pkt);
2753  return AVERROR(ENOMEM);
2754  }
2755  AV_WB64(side_data, additional_id);
2756  memcpy(side_data + 8, additional, additional_size);
2757  }
2758 
2759  if (discard_padding) {
2760  uint8_t *side_data = av_packet_new_side_data(pkt,
2762  10);
2763  if (!side_data) {
2764  av_free_packet(pkt);
2765  av_free(pkt);
2766  return AVERROR(ENOMEM);
2767  }
2768  AV_WL32(side_data, 0);
2769  AV_WL32(side_data + 4, av_rescale_q(discard_padding,
2770  (AVRational){1, 1000000000},
2771  (AVRational){1, st->codec->sample_rate}));
2772  }
2773 
2774  if (track->ms_compat)
2775  pkt->dts = timecode;
2776  else
2777  pkt->pts = timecode;
2778  pkt->pos = pos;
2779  if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
2780  /*
2781  * For backward compatibility.
2782  * Historically, we have put subtitle duration
2783  * in convergence_duration, on the off chance
2784  * that the time_scale is less than 1us, which
2785  * could result in a 32bit overflow on the
2786  * normal duration field.
2787  */
2788  pkt->convergence_duration = lace_duration;
2789  }
2790 
2791  if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE ||
2792  lace_duration <= INT_MAX) {
2793  /*
2794  * For non subtitle tracks, just store the duration
2795  * as normal.
2796  *
2797  * If it's a subtitle track and duration value does
2798  * not overflow a uint32, then also store it normally.
2799  */
2800  pkt->duration = lace_duration;
2801  }
2802 
2803  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2804  matroska->prev_pkt = pkt;
2805 
2806  return 0;
2807 
2808 fail:
2809  if (pkt_data != data)
2810  av_freep(&pkt_data);
2811  return res;
2812 }
2813 
2815  int size, int64_t pos, uint64_t cluster_time,
2816  uint64_t block_duration, int is_keyframe,
2817  uint8_t *additional, uint64_t additional_id, int additional_size,
2818  int64_t cluster_pos, int64_t discard_padding)
2819 {
2820  uint64_t timecode = AV_NOPTS_VALUE;
2821  MatroskaTrack *track;
2822  int res = 0;
2823  AVStream *st;
2824  int16_t block_time;
2825  uint32_t *lace_size = NULL;
2826  int n, flags, laces = 0;
2827  uint64_t num;
2828  int trust_default_duration = 1;
2829 
2830  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2831  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2832  return n;
2833  }
2834  data += n;
2835  size -= n;
2836 
2837  track = matroska_find_track_by_num(matroska, num);
2838  if (!track || !track->stream) {
2839  av_log(matroska->ctx, AV_LOG_INFO,
2840  "Invalid stream %"PRIu64" or size %u\n", num, size);
2841  return AVERROR_INVALIDDATA;
2842  } else if (size <= 3)
2843  return 0;
2844  st = track->stream;
2845  if (st->discard >= AVDISCARD_ALL)
2846  return res;
2847  av_assert1(block_duration != AV_NOPTS_VALUE);
2848 
2849  block_time = sign_extend(AV_RB16(data), 16);
2850  data += 2;
2851  flags = *data++;
2852  size -= 3;
2853  if (is_keyframe == -1)
2854  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2855 
2856  if (cluster_time != (uint64_t) -1 &&
2857  (block_time >= 0 || cluster_time >= -block_time)) {
2858  timecode = cluster_time + block_time - track->codec_delay;
2859  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2860  timecode < track->end_timecode)
2861  is_keyframe = 0; /* overlapping subtitles are not key frame */
2862  if (is_keyframe)
2863  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2865  }
2866 
2867  if (matroska->skip_to_keyframe &&
2868  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2869  if (timecode < matroska->skip_to_timecode)
2870  return res;
2871  if (is_keyframe)
2872  matroska->skip_to_keyframe = 0;
2873  else if (!st->skip_to_keyframe) {
2874  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
2875  matroska->skip_to_keyframe = 0;
2876  }
2877  }
2878 
2879  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2880  &lace_size, &laces);
2881 
2882  if (res)
2883  goto end;
2884 
2885  if (track->audio.samplerate == 8000) {
2886  // If this is needed for more codecs, then add them here
2887  if (st->codec->codec_id == AV_CODEC_ID_AC3) {
2888  if (track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
2889  trust_default_duration = 0;
2890  }
2891  }
2892 
2893  if (!block_duration && trust_default_duration)
2894  block_duration = track->default_duration * laces / matroska->time_scale;
2895 
2896  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
2897  track->end_timecode =
2898  FFMAX(track->end_timecode, timecode + block_duration);
2899 
2900  for (n = 0; n < laces; n++) {
2901  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
2902 
2903  if (lace_size[n] > size) {
2904  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
2905  break;
2906  }
2907 
2908  if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2909  st->codec->codec_id == AV_CODEC_ID_COOK ||
2910  st->codec->codec_id == AV_CODEC_ID_SIPR ||
2911  st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2912  st->codec->block_align && track->audio.sub_packet_size) {
2913  res = matroska_parse_rm_audio(matroska, track, st, data,
2914  lace_size[n],
2915  timecode, pos);
2916  if (res)
2917  goto end;
2918 
2919  } else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
2920  res = matroska_parse_webvtt(matroska, track, st,
2921  data, lace_size[n],
2922  timecode, lace_duration,
2923  pos);
2924  if (res)
2925  goto end;
2926  } else {
2927  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2928  timecode, lace_duration, pos,
2929  !n ? is_keyframe : 0,
2930  additional, additional_id, additional_size,
2931  discard_padding);
2932  if (res)
2933  goto end;
2934  }
2935 
2936  if (timecode != AV_NOPTS_VALUE)
2937  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
2938  data += lace_size[n];
2939  size -= lace_size[n];
2940  }
2941 
2942 end:
2943  av_free(lace_size);
2944  return res;
2945 }
2946 
2948 {
2949  EbmlList *blocks_list;
2950  MatroskaBlock *blocks;
2951  int i, res;
2952  res = ebml_parse(matroska,
2953  matroska_cluster_incremental_parsing,
2954  &matroska->current_cluster);
2955  if (res == 1) {
2956  /* New Cluster */
2957  if (matroska->current_cluster_pos)
2958  ebml_level_end(matroska);
2959  ebml_free(matroska_cluster, &matroska->current_cluster);
2960  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2961  matroska->current_cluster_num_blocks = 0;
2962  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2963  matroska->prev_pkt = NULL;
2964  /* sizeof the ID which was already read */
2965  if (matroska->current_id)
2966  matroska->current_cluster_pos -= 4;
2967  res = ebml_parse(matroska,
2968  matroska_clusters_incremental,
2969  &matroska->current_cluster);
2970  /* Try parsing the block again. */
2971  if (res == 1)
2972  res = ebml_parse(matroska,
2973  matroska_cluster_incremental_parsing,
2974  &matroska->current_cluster);
2975  }
2976 
2977  if (!res &&
2978  matroska->current_cluster_num_blocks <
2979  matroska->current_cluster.blocks.nb_elem) {
2980  blocks_list = &matroska->current_cluster.blocks;
2981  blocks = blocks_list->elem;
2982 
2983  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2984  i = blocks_list->nb_elem - 1;
2985  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2986  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2987  uint8_t* additional = blocks[i].additional.size > 0 ?
2988  blocks[i].additional.data : NULL;
2989  if (!blocks[i].non_simple)
2990  blocks[i].duration = 0;
2991  res = matroska_parse_block(matroska, blocks[i].bin.data,
2992  blocks[i].bin.size, blocks[i].bin.pos,
2993  matroska->current_cluster.timecode,
2994  blocks[i].duration, is_keyframe,
2995  additional, blocks[i].additional_id,
2996  blocks[i].additional.size,
2997  matroska->current_cluster_pos,
2998  blocks[i].discard_padding);
2999  }
3000  }
3001 
3002  return res;
3003 }
3004 
3006 {
3007  MatroskaCluster cluster = { 0 };
3008  EbmlList *blocks_list;
3009  MatroskaBlock *blocks;
3010  int i, res;
3011  int64_t pos;
3012 
3013  if (!matroska->contains_ssa)
3014  return matroska_parse_cluster_incremental(matroska);
3015  pos = avio_tell(matroska->ctx->pb);
3016  matroska->prev_pkt = NULL;
3017  if (matroska->current_id)
3018  pos -= 4; /* sizeof the ID which was already read */
3019  res = ebml_parse(matroska, matroska_clusters, &cluster);
3020  blocks_list = &cluster.blocks;
3021  blocks = blocks_list->elem;
3022  for (i = 0; i < blocks_list->nb_elem; i++)
3023  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3024  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3025  res = matroska_parse_block(matroska, blocks[i].bin.data,
3026  blocks[i].bin.size, blocks[i].bin.pos,
3027  cluster.timecode, blocks[i].duration,
3028  is_keyframe, NULL, 0, 0, pos,
3029  blocks[i].discard_padding);
3030  }
3031  ebml_free(matroska_cluster, &cluster);
3032  return res;
3033 }
3034 
3036 {
3037  MatroskaDemuxContext *matroska = s->priv_data;
3038 
3039  while (matroska_deliver_packet(matroska, pkt)) {
3040  int64_t pos = avio_tell(matroska->ctx->pb);
3041  if (matroska->done)
3042  return AVERROR_EOF;
3043  if (matroska_parse_cluster(matroska) < 0)
3044  matroska_resync(matroska, pos);
3045  }
3046 
3047  return 0;
3048 }
3049 
3050 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3051  int64_t timestamp, int flags)
3052 {
3053  MatroskaDemuxContext *matroska = s->priv_data;
3054  MatroskaTrack *tracks = NULL;
3055  AVStream *st = s->streams[stream_index];
3056  int i, index, index_sub, index_min;
3057 
3058  /* Parse the CUES now since we need the index data to seek. */
3059  if (matroska->cues_parsing_deferred > 0) {
3060  matroska->cues_parsing_deferred = 0;
3061  matroska_parse_cues(matroska);
3062  }
3063 
3064  if (!st->nb_index_entries)
3065  goto err;
3066  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3067 
3068  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3069  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3070  SEEK_SET);
3071  matroska->current_id = 0;
3072  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3073  matroska_clear_queue(matroska);
3074  if (matroska_parse_cluster(matroska) < 0)
3075  break;
3076  }
3077  }
3078 
3079  matroska_clear_queue(matroska);
3080  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3081  goto err;
3082 
3083  index_min = index;
3084  tracks = matroska->tracks.elem;
3085  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3086  tracks[i].audio.pkt_cnt = 0;
3087  tracks[i].audio.sub_packet_cnt = 0;
3088  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3089  tracks[i].end_timecode = 0;
3090  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3091  tracks[i].stream->discard != AVDISCARD_ALL) {
3092  index_sub = av_index_search_timestamp(
3093  tracks[i].stream, st->index_entries[index].timestamp,
3095  while (index_sub >= 0 &&
3096  index_min > 0 &&
3097  tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3098  st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3099  index_min--;
3100  }
3101  }
3102 
3103  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3104  matroska->current_id = 0;
3105  if (flags & AVSEEK_FLAG_ANY) {
3106  st->skip_to_keyframe = 0;
3107  matroska->skip_to_timecode = timestamp;
3108  } else {
3109  st->skip_to_keyframe = 1;
3110  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3111  }
3112  matroska->skip_to_keyframe = 1;
3113  matroska->done = 0;
3114  matroska->num_levels = 0;
3115  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3116  return 0;
3117 err:
3118  // slightly hackish but allows proper fallback to
3119  // the generic seeking code.
3120  matroska_clear_queue(matroska);
3121  matroska->current_id = 0;
3122  st->skip_to_keyframe =
3123  matroska->skip_to_keyframe = 0;
3124  matroska->done = 0;
3125  matroska->num_levels = 0;
3126  return -1;
3127 }
3128 
3130 {
3131  MatroskaDemuxContext *matroska = s->priv_data;
3132  MatroskaTrack *tracks = matroska->tracks.elem;
3133  int n;
3134 
3135  matroska_clear_queue(matroska);
3136 
3137  for (n = 0; n < matroska->tracks.nb_elem; n++)
3138  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3139  av_freep(&tracks[n].audio.buf);
3140  ebml_free(matroska_cluster, &matroska->current_cluster);
3141  ebml_free(matroska_segment, matroska);
3142 
3143  return 0;
3144 }
3145 
3146 typedef struct {
3147  int64_t start_time_ns;
3148  int64_t end_time_ns;
3149  int64_t start_offset;
3150  int64_t end_offset;
3151 } CueDesc;
3152 
3153 /* This function searches all the Cues and returns the CueDesc corresponding the
3154  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3155  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3156  */
3157 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3158  MatroskaDemuxContext *matroska = s->priv_data;
3159  CueDesc cue_desc;
3160  int i;
3161  int nb_index_entries = s->streams[0]->nb_index_entries;
3162  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3163  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3164  for (i = 1; i < nb_index_entries; i++) {
3165  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3166  index_entries[i].timestamp * matroska->time_scale > ts) {
3167  break;
3168  }
3169  }
3170  --i;
3171  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3172  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3173  if (i != nb_index_entries - 1) {
3174  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3175  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3176  } else {
3177  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3178  // FIXME: this needs special handling for files where Cues appear
3179  // before Clusters. the current logic assumes Cues appear after
3180  // Clusters.
3181  cue_desc.end_offset = cues_start - matroska->segment_start;
3182  }
3183  return cue_desc;
3184 }
3185 
3187 {
3188  MatroskaDemuxContext *matroska = s->priv_data;
3189  int64_t cluster_pos, before_pos;
3190  int index, rv = 1;
3191  if (s->streams[0]->nb_index_entries <= 0) return 0;
3192  // seek to the first cluster using cues.
3193  index = av_index_search_timestamp(s->streams[0], 0, 0);
3194  if (index < 0) return 0;
3195  cluster_pos = s->streams[0]->index_entries[index].pos;
3196  before_pos = avio_tell(s->pb);
3197  while (1) {
3198  int64_t cluster_id = 0, cluster_length = 0;
3199  AVPacket *pkt;
3200  avio_seek(s->pb, cluster_pos, SEEK_SET);
3201  // read cluster id and length
3202  ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3203  ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3204  if (cluster_id != 0xF43B675) { // done with all clusters
3205  break;
3206  }
3207  avio_seek(s->pb, cluster_pos, SEEK_SET);
3208  matroska->current_id = 0;
3209  matroska_clear_queue(matroska);
3210  if (matroska_parse_cluster(matroska) < 0 ||
3211  matroska->num_packets <= 0) {
3212  break;
3213  }
3214  pkt = matroska->packets[0];
3215  cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3216  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3217  rv = 0;
3218  break;
3219  }
3220  }
3221  avio_seek(s->pb, before_pos, SEEK_SET);
3222  return rv;
3223 }
3224 
3225 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3226  double min_buffer, double* buffer,
3227  double* sec_to_download, AVFormatContext *s,
3228  int64_t cues_start)
3229 {
3230  double nano_seconds_per_second = 1000000000.0;
3231  double time_sec = time_ns / nano_seconds_per_second;
3232  int rv = 0;
3233  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3234  int64_t end_time_ns = time_ns + time_to_search_ns;
3235  double sec_downloaded = 0.0;
3236  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3237  if (desc_curr.start_time_ns == -1)
3238  return -1;
3239  *sec_to_download = 0.0;
3240 
3241  // Check for non cue start time.
3242  if (time_ns > desc_curr.start_time_ns) {
3243  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3244  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3245  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3246  double timeToDownload = (cueBytes * 8.0) / bps;
3247 
3248  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3249  *sec_to_download += timeToDownload;
3250 
3251  // Check if the search ends within the first cue.
3252  if (desc_curr.end_time_ns >= end_time_ns) {
3253  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3254  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3255  sec_downloaded = percent_to_sub * sec_downloaded;
3256  *sec_to_download = percent_to_sub * *sec_to_download;
3257  }
3258 
3259  if ((sec_downloaded + *buffer) <= min_buffer) {
3260  return 1;
3261  }
3262 
3263  // Get the next Cue.
3264  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3265  }
3266 
3267  while (desc_curr.start_time_ns != -1) {
3268  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3269  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3270  double desc_sec = desc_ns / nano_seconds_per_second;
3271  double bits = (desc_bytes * 8.0);
3272  double time_to_download = bits / bps;
3273 
3274  sec_downloaded += desc_sec - time_to_download;
3275  *sec_to_download += time_to_download;
3276 
3277  if (desc_curr.end_time_ns >= end_time_ns) {
3278  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3279  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3280  sec_downloaded = percent_to_sub * sec_downloaded;
3281  *sec_to_download = percent_to_sub * *sec_to_download;
3282 
3283  if ((sec_downloaded + *buffer) <= min_buffer)
3284  rv = 1;
3285  break;
3286  }
3287 
3288  if ((sec_downloaded + *buffer) <= min_buffer) {
3289  rv = 1;
3290  break;
3291  }
3292 
3293  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3294  }
3295  *buffer = *buffer + sec_downloaded;
3296  return rv;
3297 }
3298 
3299 /* This function computes the bandwidth of the WebM file with the help of
3300  * buffer_size_after_time_downloaded() function. Both of these functions are
3301  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3302  * Matroska parsing mechanism.
3303  *
3304  * Returns the bandwidth of the file on success; -1 on error.
3305  * */
3306 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3307 {
3308  MatroskaDemuxContext *matroska = s->priv_data;
3309  AVStream *st = s->streams[0];
3310  double bandwidth = 0.0;
3311  int i;
3312 
3313  for (i = 0; i < st->nb_index_entries; i++) {
3314  int64_t prebuffer_ns = 1000000000;
3315  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3316  double nano_seconds_per_second = 1000000000.0;
3317  int64_t prebuffered_ns = time_ns + prebuffer_ns;
3318  double prebuffer_bytes = 0.0;
3319  int64_t temp_prebuffer_ns = prebuffer_ns;
3320  int64_t pre_bytes, pre_ns;
3321  double pre_sec, prebuffer, bits_per_second;
3322  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3323 
3324  // Start with the first Cue.
3325  CueDesc desc_end = desc_beg;
3326 
3327  // Figure out how much data we have downloaded for the prebuffer. This will
3328  // be used later to adjust the bits per sample to try.
3329  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3330  // Prebuffered the entire Cue.
3331  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3332  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3333  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3334  }
3335  if (desc_end.start_time_ns == -1) {
3336  // The prebuffer is larger than the duration.
3337  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3338  return -1;
3339  bits_per_second = 0.0;
3340  } else {
3341  // The prebuffer ends in the last Cue. Estimate how much data was
3342  // prebuffered.
3343  pre_bytes = desc_end.end_offset - desc_end.start_offset;
3344  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3345  pre_sec = pre_ns / nano_seconds_per_second;
3346  prebuffer_bytes +=
3347  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3348 
3349  prebuffer = prebuffer_ns / nano_seconds_per_second;
3350 
3351  // Set this to 0.0 in case our prebuffer buffers the entire video.
3352  bits_per_second = 0.0;
3353  do {
3354  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3355  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3356  double desc_sec = desc_ns / nano_seconds_per_second;
3357  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3358 
3359  // Drop the bps by the percentage of bytes buffered.
3360  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3361  double mod_bits_per_second = calc_bits_per_second * percent;
3362 
3363  if (prebuffer < desc_sec) {
3364  double search_sec =
3365  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3366 
3367  // Add 1 so the bits per second should be a little bit greater than file
3368  // datarate.
3369  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3370  const double min_buffer = 0.0;
3371  double buffer = prebuffer;
3372  double sec_to_download = 0.0;
3373 
3374  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3375  min_buffer, &buffer, &sec_to_download,
3376  s, cues_start);
3377  if (rv < 0) {
3378  return -1;
3379  } else if (rv == 0) {
3380  bits_per_second = (double)(bps);
3381  break;
3382  }
3383  }
3384 
3385  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3386  } while (desc_end.start_time_ns != -1);
3387  }
3388  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3389  }
3390  return (int64_t)bandwidth;
3391 }
3392 
3394 {
3395  MatroskaDemuxContext *matroska = s->priv_data;
3396  EbmlList *seekhead_list = &matroska->seekhead;
3397  MatroskaSeekhead *seekhead = seekhead_list->elem;
3398  char *buf;
3399  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3400  int i;
3401 
3402  // determine cues start and end positions
3403  for (i = 0; i < seekhead_list->nb_elem; i++)
3404  if (seekhead[i].id == MATROSKA_ID_CUES)
3405  break;
3406 
3407  if (i >= seekhead_list->nb_elem) return -1;
3408 
3409  before_pos = avio_tell(matroska->ctx->pb);
3410  cues_start = seekhead[i].pos + matroska->segment_start;
3411  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3412  // cues_end is computed as cues_start + cues_length + length of the
3413  // Cues element ID + EBML length of the Cues element. cues_end is
3414  // inclusive and the above sum is reduced by 1.
3415  uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3416  bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3417  bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3418  cues_end = cues_start + cues_length + bytes_read - 1;
3419  }
3420  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3421  if (cues_start == -1 || cues_end == -1) return -1;
3422 
3423  // parse the cues
3424  matroska_parse_cues(matroska);
3425 
3426  // cues start
3427  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3428 
3429  // cues end
3430  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3431 
3432  // bandwidth
3433  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3434  if (bandwidth < 0) return -1;
3435  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3436 
3437  // check if all clusters start with key frames
3439 
3440  // store cue point timestamps as a comma separated list for checking subsegment alignment in
3441  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3442  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3443  if (!buf) return -1;
3444  strcpy(buf, "");
3445  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3446  snprintf(buf, (i + 1) * 20 * sizeof(char),
3447  "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3448  if (i != s->streams[0]->nb_index_entries - 1)
3449  strncat(buf, ",", sizeof(char));
3450  }
3451  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3452  av_free(buf);
3453 
3454  return 0;
3455 }
3456 
3458 {
3459  char *buf;
3460  int ret = matroska_read_header(s);
3461  MatroskaTrack *tracks;
3462  MatroskaDemuxContext *matroska = s->priv_data;
3463  if (ret) {
3464  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3465  return -1;
3466  }
3467 
3468  if (!matroska->is_live) {
3469  buf = av_asprintf("%g", matroska->duration);
3470  if (!buf) return AVERROR(ENOMEM);
3471  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3472  av_free(buf);
3473 
3474  // initialization range
3475  // 5 is the offset of Cluster ID.
3477  }
3478 
3479  // basename of the file
3480  buf = strrchr(s->filename, '/');
3481  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3482 
3483  // track number
3484  tracks = matroska->tracks.elem;
3485  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3486 
3487  // parse the cues and populate Cue related fields
3488  return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3489 }
3490 
3492 {
3493  return AVERROR_EOF;
3494 }
3495 
3496 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3497 static const AVOption options[] = {
3498  { "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 },
3499  { NULL },
3500 };
3501 
3502 static const AVClass webm_dash_class = {
3503  .class_name = "WebM DASH Manifest demuxer",
3504  .item_name = av_default_item_name,
3505  .option = options,
3506  .version = LIBAVUTIL_VERSION_INT,
3507 };
3508 
3510  .name = "matroska,webm",
3511  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3512  .extensions = "mkv,mk3d,mka,mks",
3513  .priv_data_size = sizeof(MatroskaDemuxContext),
3519  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3520 };
3521 
3523  .name = "webm_dash_manifest",
3524  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3525  .priv_data_size = sizeof(MatroskaDemuxContext),
3529  .priv_class = &webm_dash_class,
3530 };
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
const char * s
Definition: matroskadec.c:90
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2277
#define AV_DISPOSITION_METADATA
Definition: avformat.h:826
union EbmlSyntax::@167 def
#define NULL
Definition: coverity.c:32
#define MATROSKA_ID_BLOCKADDID
Definition: matroska.h:194
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:104
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:417
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:2410
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:1398
#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:1354
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:3491
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2258
#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:3509
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:1745
enum AVCodecID id
Definition: mxfenc.c:101
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:2773
#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:1448
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:3186
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:4083
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:2279
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:2683
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:204
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:210
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1045
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:201
uint64_t flag_forced
Definition: matroskadec.c:179
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 AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:126
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:124
static const EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c: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:277
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:3055
int version
Definition: avisynth_c.h:629
discard all
Definition: avcodec.h:689
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:675
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:87
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:87
#define MATROSKA_ID_CLUSTERTIMECODE
Definition: matroska.h:188
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2299
#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:3845
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:207
Format I/O context.
Definition: avformat.h:1273
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:225
UID uid
Definition: mxfenc.c:1804
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:1659
#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:3457
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:1386
Public dictionary API.
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:181
static const EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:503
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1011
uint64_t pixel_height
Definition: matroskadec.c:136
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:319
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:3157
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 av_always_inline av_const int isnan(float x)
Definition: libm.h:96
static int webm_dash_manifest_cues(AVFormatContext *s)
Definition: matroskadec.c:3393
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:71
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:690
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:90
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:117
#define TRACK_NUMBER
Definition: matroska.h:297
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1573
enum AVStreamParseType need_parsing
Definition: avformat.h:1034
#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:1617
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:3749
#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:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1341
#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:1384
uint8_t * data
Definition: avcodec.h:1423
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:2947
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord)
Definition: vf_neighbor.c:130
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:112
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:221
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
#define MATROSKA_ID_BLOCKADDITIONS
Definition: matroska.h:192
uint32_t tag
Definition: movenc.c:1334
static const EbmlSyntax matroska_index[]
Definition: matroskadec.c:523
int64_t start_time_ns
Definition: matroskadec.c:3147
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define MATROSKA_ID_CODECDECODEALL
Definition: matroska.h:93
#define MATROSKA_ID_ENCODINGENCRYPTION
Definition: matroska.h:142
enum AVCodecID id
Definition: internal.h:49
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define MATROSKA_ID_CUES
Definition: matroska.h:58
#define EBML_MAX_DEPTH
Definition: matroska.h:277
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:757
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:390
static const uint8_t header[24]
Definition: sdr2.c:67
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2996
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
static int64_t duration
Definition: ffplay.c:326
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:178
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1441
#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:538
#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:1432
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1469
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3005
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:1485
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:200
int64_t end_offset
Definition: matroskadec.c:3150
#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:1844
int profile
Definition: mxfenc.c:1806
static const uint16_t mask[17]
Definition: lzw.c:38
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2901
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:1467
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:2814
#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
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:425
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:172
enum AVCodecID id
Definition: matroska.h:273
#define MATROSKA_ID_VIDEOPIXELCROPR
Definition: matroska.h:119
#define MATROSKA_ID_TRACKPLANEUID
Definition: matroska.h:86
GLsizei GLsizei * length
Definition: opengl_enc.c:115
#define MATROSKA_ID_ENCODINGCOMPSETTINGS
Definition: matroska.h:140
#define EBML_ID_EBMLMAXIDLENGTH
Definition: matroska.h:38
#define MATROSKA_ID_CHAPTERFLAGHIDDEN
Definition: matroska.h:226
static const EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c: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:79
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:57
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1429
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2323
Only parse headers, do not repack.
Definition: avformat.h:775
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:529
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1138
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 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:2103
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1543
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:1567
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1477
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:119
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:1349
#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:246
static const EbmlSyntax matroska_clusters[]
Definition: matroskadec.c:618
#define FFMIN(a, b)
Definition: common.h:81
#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:1046
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:717
static const EbmlSyntax matroska_track_combine_planes[]
Definition: matroskadec.c:417
int width
picture width / height.
Definition: avcodec.h:1681
#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:1213
#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:3129
#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:1227
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:215
#define OFFSET(x)
Definition: matroskadec.c:3496
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:197
#define MATROSKA_ID_VIDEOCOLORSPACE
Definition: matroska.h:125
#define MATROSKA_ID_CHAPTERS
Definition: matroska.h:63
static int matroska_probe(AVProbeData *p)
Definition: matroskadec.c:1171
#define EBML_ID_VOID
Definition: matroska.h:45
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1363
uint64_t max_block_additional_id
Definition: matroskadec.c:190
const uint8_t ff_log2_tab[256]
Definition: log2_tab.c:23
#define MATROSKA_ID_AUDIOSAMPLINGFREQ
Definition: matroska.h:128
#define FF_ARRAY_ELEMS(a)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:819
double f
Definition: matroskadec.c:89
#define MATROSKA_ID_TRACKMINCACHE
Definition: matroska.h:102
#define av_log2
Definition: intmath.h:100
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
Definition: matroskadec.c:1583
static int matroska_parse_flac(AVFormatContext *s, MatroskaTrack *track, int *offset)
Definition: matroskadec.c:1594
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:623
static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: matroskadec.c:3050
Stream structure.
Definition: avformat.h:842
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:2487
#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:2282
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:1649
#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:1510
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom.c:268
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
Definition: matroskadec.c:882
enum AVCodecID codec_id
Definition: avcodec.h:1519
#define MATROSKA_ID_TAGDEFAULT
Definition: matroska.h:171
#define BANDWIDTH
Definition: matroska.h:293
#define MATROSKA_ID_SEEKID
Definition: matroska.h:184
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
static const EbmlSyntax matroska_track_encoding_compression[]
Definition: matroskadec.c:381
int sample_rate
samples per second
Definition: avcodec.h:2262
AVIOContext * pb
I/O context.
Definition: avformat.h:1315
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:1534
static const AVClass webm_dash_class
Definition: matroskadec.c:3502
int64_t start_offset
Definition: matroskadec.c:3149
#define MATROSKA_ID_TRACKFLAGENABLED
Definition: matroska.h:98
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2924
#define MATROSKA_ID_TRACKS
Definition: matroska.h:57
void * buf
Definition: avisynth_c.h:553
#define MATROSKA_ID_TRACKPLANE
Definition: matroska.h:85
Data found in BlockAdditional element of matroska container.
Definition: avcodec.h:1349
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1618
#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:1047
#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:2301
#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:3035
Recommmends skipping the specified number of samples.
Definition: avcodec.h:1314
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 ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int size, int big_endian)
Definition: riffdec.c:86
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:3148
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:138
#define MATROSKA_ID_ATTACHMENTS
Definition: matroska.h:61
static const EbmlSyntax matroska_chapter_display[]
Definition: matroskadec.c: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
full parsing and repack
Definition: avformat.h:774
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:87
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
if(ret< 0)
Definition: vf_mcdeint.c:280
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:72
void * av_realloc(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:145
char * string
Definition: matroskadec.c: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:1512
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
static unsigned bit_depth(uint64_t mask)
Definition: af_astats.c:128
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:208
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:49
int den
denominator
Definition: rational.h:45
#define MATROSKA_ID_ENCODINGSIGNATURE
Definition: matroska.h:149
#define MATROSKA_ID_SEGMENT
Definition: matroska.h:53
uint32_t id
Definition: matroskadec.c:83
unsigned bps
Definition: movenc.c:1335
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:1360
#define MKBETAG(a, b, c, d)
Definition: common.h:331
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:636
#define MATROSKA_ID_SEEKHEAD
Definition: matroska.h:60
ASS as defined in Matroska.
Definition: avcodec.h:532
static int matroska_parse_webvtt(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int data_len, uint64_t timecode, uint64_t duration, int64_t pos)
Definition: matroskadec.c:2567
#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:1085
#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:2263
#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:1301
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:1422
#define EBML_ID_EBMLMAXSIZELENGTH
Definition: matroska.h:39
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1368
MatroskaTrackEncryption encryption
Definition: matroskadec.c:128