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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"
44 
45 #include "libavcodec/bytestream.h"
46 #include "libavcodec/flac.h"
47 #include "libavcodec/mpeg4audio.h"
48 
49 #include "avformat.h"
50 #include "avio_internal.h"
51 #include "internal.h"
52 #include "isom.h"
53 #include "matroska.h"
54 #include "oggdec.h"
55 /* For ff_codec_get_id(). */
56 #include "riff.h"
57 #include "rmsipr.h"
58 
59 #if CONFIG_BZLIB
60 #include <bzlib.h>
61 #endif
62 #if CONFIG_ZLIB
63 #include <zlib.h>
64 #endif
65 
66 typedef enum {
79 } EbmlType;
80 
81 typedef const struct EbmlSyntax {
82  uint32_t id;
86  union {
87  uint64_t u;
88  double f;
89  const char *s;
90  const struct EbmlSyntax *n;
91  } def;
92 } EbmlSyntax;
93 
94 typedef struct EbmlList {
95  int nb_elem;
96  void *elem;
97 } EbmlList;
98 
99 typedef struct EbmlBin {
100  int size;
102  int64_t pos;
103 } EbmlBin;
104 
105 typedef struct Ebml {
106  uint64_t version;
107  uint64_t max_size;
108  uint64_t id_length;
109  char *doctype;
110  uint64_t doctype_version;
111 } Ebml;
112 
113 typedef struct MatroskaTrackCompression {
114  uint64_t algo;
117 
118 typedef struct MatroskaTrackEncryption {
119  uint64_t algo;
122 
123 typedef struct MatroskaTrackEncoding {
124  uint64_t scope;
125  uint64_t type;
129 
130 typedef struct MatroskaTrackVideo {
131  double frame_rate;
132  uint64_t display_width;
133  uint64_t display_height;
134  uint64_t pixel_width;
135  uint64_t pixel_height;
137  uint64_t stereo_mode;
138  uint64_t alpha_mode;
140 
141 typedef struct MatroskaTrackAudio {
142  double samplerate;
144  uint64_t bitdepth;
145  uint64_t channels;
146 
147  /* real audio header (extracted from extradata) */
153  int pkt_cnt;
154  uint64_t buf_timecode;
157 
158 typedef struct MatroskaTrackPlane {
159  uint64_t uid;
160  uint64_t type;
162 
163 typedef struct MatroskaTrackOperation {
166 
167 typedef struct MatroskaTrack {
168  uint64_t num;
169  uint64_t uid;
170  uint64_t type;
171  char *name;
172  char *codec_id;
174  char *language;
175  double time_scale;
177  uint64_t flag_default;
178  uint64_t flag_forced;
179  uint64_t seek_preroll;
184  uint64_t codec_delay;
185 
187  int64_t end_timecode;
190 } MatroskaTrack;
191 
192 typedef struct MatroskaAttachment {
193  uint64_t uid;
194  char *filename;
195  char *mime;
197 
200 
201 typedef struct MatroskaChapter {
202  uint64_t start;
203  uint64_t end;
204  uint64_t uid;
205  char *title;
206 
209 
210 typedef struct MatroskaIndexPos {
211  uint64_t track;
212  uint64_t pos;
214 
215 typedef struct MatroskaIndex {
216  uint64_t time;
218 } MatroskaIndex;
219 
220 typedef struct MatroskaTag {
221  char *name;
222  char *string;
223  char *lang;
224  uint64_t def;
226 } MatroskaTag;
227 
228 typedef struct MatroskaTagTarget {
229  char *type;
230  uint64_t typevalue;
231  uint64_t trackuid;
232  uint64_t chapteruid;
233  uint64_t attachuid;
235 
236 typedef struct MatroskaTags {
239 } MatroskaTags;
240 
241 typedef struct MatroskaSeekhead {
242  uint64_t id;
243  uint64_t pos;
245 
246 typedef struct MatroskaLevel {
247  uint64_t start;
248  uint64_t length;
249 } MatroskaLevel;
250 
251 typedef struct MatroskaCluster {
252  uint64_t timecode;
255 
256 typedef struct MatroskaLevel1Element {
257  uint64_t id;
258  uint64_t pos;
259  int parsed;
261 
262 typedef struct MatroskaDemuxContext {
264 
265  /* EBML stuff */
268  int level_up;
269  uint32_t current_id;
270 
271  uint64_t time_scale;
272  double duration;
273  char *title;
274  char *muxingapp;
282 
283  /* byte position of the segment inside the stream */
284  int64_t segment_start;
285 
286  /* the packet queue */
290 
291  int done;
292 
293  /* What to skip before effectively reading a packet. */
296 
297  /* File has a CUES element, but we defer parsing until it is needed. */
299 
300  /* Level1 elements and whether they were read yet */
303 
307 
308  /* File has SSA subtitles which prevent incremental cluster parsing. */
311 
312 typedef struct MatroskaBlock {
313  uint64_t duration;
314  int64_t reference;
315  uint64_t non_simple;
317  uint64_t additional_id;
320 } MatroskaBlock;
321 
323  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
324  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
325  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
326  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
327  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
330  { 0 }
331 };
332 
334  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
335  { 0 }
336 };
337 
339  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
341  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
343  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
344  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
346  { 0 }
347 };
348 
350  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
351  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
352  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
353  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
354  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
355  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
356  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
365  { 0 }
366 };
367 
369  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
370  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
372  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
373  { 0 }
374 };
375 
379  { 0 }
380 };
381 
390  { 0 }
391 };
393  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
394  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
395  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
396  { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
398  { 0 }
399 };
400 
402  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
403  { 0 }
404 };
405 
409  { 0 }
410 };
411 
413  { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
414  { 0 }
415 };
416 
418  { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
419  { 0 }
420 };
421 
423  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
425  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
428  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
429  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
430  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
431  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
432  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
433  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
434  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
435  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
436  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
437  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
438  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
439  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
440  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
449  { 0 }
450 };
451 
453  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
454  { 0 }
455 };
456 
459  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
460  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
461  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
463  { 0 }
464 };
465 
467  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
468  { 0 }
469 };
470 
472  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
474  { 0 }
475 };
476 
481  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
486  { 0 }
487 };
488 
490  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
495  { 0 }
496 };
497 
499  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
500  { 0 }
501 };
502 
504  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
509  { 0 }
510 };
511 
513  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
514  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
515  { 0 }
516 };
517 
519  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
520  { 0 }
521 };
522 
524  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
525  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
526  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
527  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
528  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
529  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
530  { 0 }
531 };
532 
535  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
536  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
537  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
538  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
539  { 0 }
540 };
541 
543  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
544  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
545  { 0 }
546 };
547 
549  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
550  { 0 }
551 };
552 
554  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
555  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
556  { 0 }
557 };
558 
560  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
561  { 0 }
562 };
563 
565  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
566  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
567  { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
568  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
569  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
570  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
571  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
573  { 0 }
574 };
575 
577  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
578  { 0 }
579 };
580 
582  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
583  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
584  { 0 }
585 };
586 
588  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
589  { 0 }
590 };
591 
593  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
594  { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
595  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
597  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
598  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
600  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
601  { 0 }
602 };
603 
605  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
606  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
607  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
610  { 0 }
611 };
612 
614  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
619  { 0 }
620 };
621 
623  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
624  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
625  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
633  { 0 }
634 };
635 
637  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
642  { 0 }
643 };
644 
646  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
651  { 0 }
652 };
653 
654 static const char *const matroska_doctypes[] = { "matroska", "webm" };
655 
656 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
657 {
658  AVIOContext *pb = matroska->ctx->pb;
659  uint32_t id;
660  matroska->current_id = 0;
661  matroska->num_levels = 0;
662 
663  /* seek to next position to resync from */
664  if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
665  goto eof;
666 
667  id = avio_rb32(pb);
668 
669  // try to find a toplevel element
670  while (!avio_feof(pb)) {
671  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
672  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
674  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
675  matroska->current_id = id;
676  return 0;
677  }
678  id = (id << 8) | avio_r8(pb);
679  }
680 
681 eof:
682  matroska->done = 1;
683  return AVERROR_EOF;
684 }
685 
686 /*
687  * Return: Whether we reached the end of a level in the hierarchy or not.
688  */
690 {
691  AVIOContext *pb = matroska->ctx->pb;
692  int64_t pos = avio_tell(pb);
693 
694  if (matroska->num_levels > 0) {
695  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
696  if (pos - level->start >= level->length || matroska->current_id) {
697  matroska->num_levels--;
698  return 1;
699  }
700  }
701  return 0;
702 }
703 
704 /*
705  * Read: an "EBML number", which is defined as a variable-length
706  * array of bytes. The first byte indicates the length by giving a
707  * number of 0-bits followed by a one. The position of the first
708  * "one" bit inside the first byte indicates the length of this
709  * number.
710  * Returns: number of bytes read, < 0 on error
711  */
713  int max_size, uint64_t *number)
714 {
715  int read = 1, n = 1;
716  uint64_t total = 0;
717 
718  /* The first byte tells us the length in bytes - avio_r8() can normally
719  * return 0, but since that's not a valid first ebmlID byte, we can
720  * use it safely here to catch EOS. */
721  if (!(total = avio_r8(pb))) {
722  /* we might encounter EOS here */
723  if (!avio_feof(pb)) {
724  int64_t pos = avio_tell(pb);
725  av_log(matroska->ctx, AV_LOG_ERROR,
726  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
727  pos, pos);
728  return pb->error ? pb->error : AVERROR(EIO);
729  }
730  return AVERROR_EOF;
731  }
732 
733  /* get the length of the EBML number */
734  read = 8 - ff_log2_tab[total];
735  if (read > max_size) {
736  int64_t pos = avio_tell(pb) - 1;
737  av_log(matroska->ctx, AV_LOG_ERROR,
738  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
739  (uint8_t) total, pos, pos);
740  return AVERROR_INVALIDDATA;
741  }
742 
743  /* read out length */
744  total ^= 1 << ff_log2_tab[total];
745  while (n++ < read)
746  total = (total << 8) | avio_r8(pb);
747 
748  *number = total;
749 
750  return read;
751 }
752 
753 /**
754  * Read a EBML length value.
755  * This needs special handling for the "unknown length" case which has multiple
756  * encodings.
757  */
759  uint64_t *number)
760 {
761  int res = ebml_read_num(matroska, pb, 8, number);
762  if (res > 0 && *number + 1 == 1ULL << (7 * res))
763  *number = 0xffffffffffffffULL;
764  return res;
765 }
766 
767 /*
768  * Read the next element as an unsigned int.
769  * 0 is success, < 0 is failure.
770  */
771 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
772 {
773  int n = 0;
774 
775  if (size > 8)
776  return AVERROR_INVALIDDATA;
777 
778  /* big-endian ordering; build up number */
779  *num = 0;
780  while (n++ < size)
781  *num = (*num << 8) | avio_r8(pb);
782 
783  return 0;
784 }
785 
786 /*
787  * Read the next element as a signed int.
788  * 0 is success, < 0 is failure.
789  */
790 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
791 {
792  int n = 1;
793 
794  if (size > 8)
795  return AVERROR_INVALIDDATA;
796 
797  if (size == 0) {
798  *num = 0;
799  } else {
800  *num = sign_extend(avio_r8(pb), 8);
801 
802  /* big-endian ordering; build up number */
803  while (n++ < size)
804  *num = (*num << 8) | avio_r8(pb);
805  }
806 
807  return 0;
808 }
809 
810 /*
811  * Read the next element as a float.
812  * 0 is success, < 0 is failure.
813  */
814 static int ebml_read_float(AVIOContext *pb, int size, double *num)
815 {
816  if (size == 0)
817  *num = 0;
818  else if (size == 4)
819  *num = av_int2float(avio_rb32(pb));
820  else if (size == 8)
821  *num = av_int2double(avio_rb64(pb));
822  else
823  return AVERROR_INVALIDDATA;
824 
825  return 0;
826 }
827 
828 /*
829  * Read the next element as an ASCII string.
830  * 0 is success, < 0 is failure.
831  */
832 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
833 {
834  char *res;
835 
836  /* EBML strings are usually not 0-terminated, so we allocate one
837  * byte more, read the string and NULL-terminate it ourselves. */
838  if (!(res = av_malloc(size + 1)))
839  return AVERROR(ENOMEM);
840  if (avio_read(pb, (uint8_t *) res, size) != size) {
841  av_free(res);
842  return AVERROR(EIO);
843  }
844  (res)[size] = '\0';
845  av_free(*str);
846  *str = res;
847 
848  return 0;
849 }
850 
851 /*
852  * Read the next element as binary data.
853  * 0 is success, < 0 is failure.
854  */
855 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
856 {
857  av_fast_padded_malloc(&bin->data, &bin->size, length);
858  if (!bin->data)
859  return AVERROR(ENOMEM);
860 
861  bin->size = length;
862  bin->pos = avio_tell(pb);
863  if (avio_read(pb, bin->data, length) != length) {
864  av_freep(&bin->data);
865  bin->size = 0;
866  return AVERROR(EIO);
867  }
868 
869  return 0;
870 }
871 
872 /*
873  * Read the next element, but only the header. The contents
874  * are supposed to be sub-elements which can be read separately.
875  * 0 is success, < 0 is failure.
876  */
877 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
878 {
879  AVIOContext *pb = matroska->ctx->pb;
881 
882  if (matroska->num_levels >= EBML_MAX_DEPTH) {
883  av_log(matroska->ctx, AV_LOG_ERROR,
884  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
885  return AVERROR(ENOSYS);
886  }
887 
888  level = &matroska->levels[matroska->num_levels++];
889  level->start = avio_tell(pb);
890  level->length = length;
891 
892  return 0;
893 }
894 
895 /*
896  * Read signed/unsigned "EBML" numbers.
897  * Return: number of bytes processed, < 0 on error
898  */
900  uint8_t *data, uint32_t size, uint64_t *num)
901 {
902  AVIOContext pb;
903  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
904  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
905 }
906 
907 /*
908  * Same as above, but signed.
909  */
911  uint8_t *data, uint32_t size, int64_t *num)
912 {
913  uint64_t unum;
914  int res;
915 
916  /* read as unsigned number first */
917  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
918  return res;
919 
920  /* make signed (weird way) */
921  *num = unum - ((1LL << (7 * res - 1)) - 1);
922 
923  return res;
924 }
925 
926 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
927  EbmlSyntax *syntax, void *data);
928 
929 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
930  uint32_t id, void *data)
931 {
932  int i;
933  for (i = 0; syntax[i].id; i++)
934  if (id == syntax[i].id)
935  break;
936  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
937  matroska->num_levels > 0 &&
938  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
939  return 0; // we reached the end of an unknown size cluster
940  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
941  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
942  }
943  return ebml_parse_elem(matroska, &syntax[i], data);
944 }
945 
946 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
947  void *data)
948 {
949  if (!matroska->current_id) {
950  uint64_t id;
951  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
952  if (res < 0)
953  return res;
954  matroska->current_id = id | 1 << 7 * res;
955  }
956  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
957 }
958 
959 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
960  void *data)
961 {
962  int i, res = 0;
963 
964  for (i = 0; syntax[i].id; i++)
965  switch (syntax[i].type) {
966  case EBML_UINT:
967  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
968  break;
969  case EBML_FLOAT:
970  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
971  break;
972  case EBML_STR:
973  case EBML_UTF8:
974  // the default may be NULL
975  if (syntax[i].def.s) {
976  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
977  *dst = av_strdup(syntax[i].def.s);
978  if (!*dst)
979  return AVERROR(ENOMEM);
980  }
981  break;
982  }
983 
984  while (!res && !ebml_level_end(matroska))
985  res = ebml_parse(matroska, syntax, data);
986 
987  return res;
988 }
989 
990 /*
991  * Allocate and return the entry for the level1 element with the given ID. If
992  * an entry already exists, return the existing entry.
993  */
995  uint32_t id)
996 {
997  int i;
998  MatroskaLevel1Element *elem;
999 
1000  // Some files link to all clusters; useless.
1001  if (id == MATROSKA_ID_CLUSTER)
1002  return NULL;
1003 
1004  // There can be multiple seekheads.
1005  if (id != MATROSKA_ID_SEEKHEAD) {
1006  for (i = 0; i < matroska->num_level1_elems; i++) {
1007  if (matroska->level1_elems[i].id == id)
1008  return &matroska->level1_elems[i];
1009  }
1010  }
1011 
1012  // Only a completely broken file would have more elements.
1013  // It also provides a low-effort way to escape from circular seekheads
1014  // (every iteration will add a level1 entry).
1015  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1016  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1017  return NULL;
1018  }
1019 
1020  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1021  *elem = (MatroskaLevel1Element){.id = id};
1022 
1023  return elem;
1024 }
1025 
1027  EbmlSyntax *syntax, void *data)
1028 {
1029  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1030  [EBML_UINT] = 8,
1031  [EBML_FLOAT] = 8,
1032  // max. 16 MB for strings
1033  [EBML_STR] = 0x1000000,
1034  [EBML_UTF8] = 0x1000000,
1035  // max. 256 MB for binary data
1036  [EBML_BIN] = 0x10000000,
1037  // no limits for anything else
1038  };
1039  AVIOContext *pb = matroska->ctx->pb;
1040  uint32_t id = syntax->id;
1041  uint64_t length;
1042  int res;
1043  void *newelem;
1044  MatroskaLevel1Element *level1_elem;
1045 
1046  data = (char *) data + syntax->data_offset;
1047  if (syntax->list_elem_size) {
1048  EbmlList *list = data;
1049  newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1050  if (!newelem)
1051  return AVERROR(ENOMEM);
1052  list->elem = newelem;
1053  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1054  memset(data, 0, syntax->list_elem_size);
1055  list->nb_elem++;
1056  }
1057 
1058  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1059  matroska->current_id = 0;
1060  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1061  return res;
1062  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1063  av_log(matroska->ctx, AV_LOG_ERROR,
1064  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1065  length, max_lengths[syntax->type], syntax->type);
1066  return AVERROR_INVALIDDATA;
1067  }
1068  }
1069 
1070  switch (syntax->type) {
1071  case EBML_UINT:
1072  res = ebml_read_uint(pb, length, data);
1073  break;
1074  case EBML_SINT:
1075  res = ebml_read_sint(pb, length, data);
1076  break;
1077  case EBML_FLOAT:
1078  res = ebml_read_float(pb, length, data);
1079  break;
1080  case EBML_STR:
1081  case EBML_UTF8:
1082  res = ebml_read_ascii(pb, length, data);
1083  break;
1084  case EBML_BIN:
1085  res = ebml_read_binary(pb, length, data);
1086  break;
1087  case EBML_LEVEL1:
1088  case EBML_NEST:
1089  if ((res = ebml_read_master(matroska, length)) < 0)
1090  return res;
1091  if (id == MATROSKA_ID_SEGMENT)
1092  matroska->segment_start = avio_tell(matroska->ctx->pb);
1093  if (id == MATROSKA_ID_CUES)
1094  matroska->cues_parsing_deferred = 0;
1095  if (syntax->type == EBML_LEVEL1 &&
1096  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1097  if (level1_elem->parsed)
1098  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1099  level1_elem->parsed = 1;
1100  }
1101  return ebml_parse_nest(matroska, syntax->def.n, data);
1102  case EBML_PASS:
1103  return ebml_parse_id(matroska, syntax->def.n, id, data);
1104  case EBML_STOP:
1105  return 1;
1106  default:
1107  if (ffio_limit(pb, length) != length)
1108  return AVERROR(EIO);
1109  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1110  }
1111  if (res == AVERROR_INVALIDDATA)
1112  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1113  else if (res == AVERROR(EIO))
1114  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1115  return res;
1116 }
1117 
1118 static void ebml_free(EbmlSyntax *syntax, void *data)
1119 {
1120  int i, j;
1121  for (i = 0; syntax[i].id; i++) {
1122  void *data_off = (char *) data + syntax[i].data_offset;
1123  switch (syntax[i].type) {
1124  case EBML_STR:
1125  case EBML_UTF8:
1126  av_freep(data_off);
1127  break;
1128  case EBML_BIN:
1129  av_freep(&((EbmlBin *) data_off)->data);
1130  break;
1131  case EBML_LEVEL1:
1132  case EBML_NEST:
1133  if (syntax[i].list_elem_size) {
1134  EbmlList *list = data_off;
1135  char *ptr = list->elem;
1136  for (j = 0; j < list->nb_elem;
1137  j++, ptr += syntax[i].list_elem_size)
1138  ebml_free(syntax[i].def.n, ptr);
1139  av_freep(&list->elem);
1140  } else
1141  ebml_free(syntax[i].def.n, data_off);
1142  default:
1143  break;
1144  }
1145  }
1146 }
1147 
1148 /*
1149  * Autodetecting...
1150  */
1152 {
1153  uint64_t total = 0;
1154  int len_mask = 0x80, size = 1, n = 1, i;
1155 
1156  /* EBML header? */
1157  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1158  return 0;
1159 
1160  /* length of header */
1161  total = p->buf[4];
1162  while (size <= 8 && !(total & len_mask)) {
1163  size++;
1164  len_mask >>= 1;
1165  }
1166  if (size > 8)
1167  return 0;
1168  total &= (len_mask - 1);
1169  while (n < size)
1170  total = (total << 8) | p->buf[4 + n++];
1171 
1172  /* Does the probe data contain the whole header? */
1173  if (p->buf_size < 4 + size + total)
1174  return 0;
1175 
1176  /* The header should contain a known document type. For now,
1177  * we don't parse the whole header but simply check for the
1178  * availability of that array of characters inside the header.
1179  * Not fully fool-proof, but good enough. */
1180  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1181  int probelen = strlen(matroska_doctypes[i]);
1182  if (total < probelen)
1183  continue;
1184  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1185  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1186  return AVPROBE_SCORE_MAX;
1187  }
1188 
1189  // probably valid EBML header but no recognized doctype
1190  return AVPROBE_SCORE_EXTENSION;
1191 }
1192 
1194  int num)
1195 {
1196  MatroskaTrack *tracks = matroska->tracks.elem;
1197  int i;
1198 
1199  for (i = 0; i < matroska->tracks.nb_elem; i++)
1200  if (tracks[i].num == num)
1201  return &tracks[i];
1202 
1203  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1204  return NULL;
1205 }
1206 
1207 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1208  MatroskaTrack *track)
1209 {
1210  MatroskaTrackEncoding *encodings = track->encodings.elem;
1211  uint8_t *data = *buf;
1212  int isize = *buf_size;
1213  uint8_t *pkt_data = NULL;
1214  uint8_t av_unused *newpktdata;
1215  int pkt_size = isize;
1216  int result = 0;
1217  int olen;
1218 
1219  if (pkt_size >= 10000000U)
1220  return AVERROR_INVALIDDATA;
1221 
1222  switch (encodings[0].compression.algo) {
1224  {
1225  int header_size = encodings[0].compression.settings.size;
1226  uint8_t *header = encodings[0].compression.settings.data;
1227 
1228  if (header_size && !header) {
1229  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1230  return -1;
1231  }
1232 
1233  if (!header_size)
1234  return 0;
1235 
1236  pkt_size = isize + header_size;
1237  pkt_data = av_malloc(pkt_size);
1238  if (!pkt_data)
1239  return AVERROR(ENOMEM);
1240 
1241  memcpy(pkt_data, header, header_size);
1242  memcpy(pkt_data + header_size, data, isize);
1243  break;
1244  }
1245 #if CONFIG_LZO
1247  do {
1248  olen = pkt_size *= 3;
1249  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1250  if (!newpktdata) {
1251  result = AVERROR(ENOMEM);
1252  goto failed;
1253  }
1254  pkt_data = newpktdata;
1255  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1256  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1257  if (result) {
1258  result = AVERROR_INVALIDDATA;
1259  goto failed;
1260  }
1261  pkt_size -= olen;
1262  break;
1263 #endif
1264 #if CONFIG_ZLIB
1266  {
1267  z_stream zstream = { 0 };
1268  if (inflateInit(&zstream) != Z_OK)
1269  return -1;
1270  zstream.next_in = data;
1271  zstream.avail_in = isize;
1272  do {
1273  pkt_size *= 3;
1274  newpktdata = av_realloc(pkt_data, pkt_size);
1275  if (!newpktdata) {
1276  inflateEnd(&zstream);
1277  result = AVERROR(ENOMEM);
1278  goto failed;
1279  }
1280  pkt_data = newpktdata;
1281  zstream.avail_out = pkt_size - zstream.total_out;
1282  zstream.next_out = pkt_data + zstream.total_out;
1283  result = inflate(&zstream, Z_NO_FLUSH);
1284  } while (result == Z_OK && pkt_size < 10000000);
1285  pkt_size = zstream.total_out;
1286  inflateEnd(&zstream);
1287  if (result != Z_STREAM_END) {
1288  if (result == Z_MEM_ERROR)
1289  result = AVERROR(ENOMEM);
1290  else
1291  result = AVERROR_INVALIDDATA;
1292  goto failed;
1293  }
1294  break;
1295  }
1296 #endif
1297 #if CONFIG_BZLIB
1299  {
1300  bz_stream bzstream = { 0 };
1301  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1302  return -1;
1303  bzstream.next_in = data;
1304  bzstream.avail_in = isize;
1305  do {
1306  pkt_size *= 3;
1307  newpktdata = av_realloc(pkt_data, pkt_size);
1308  if (!newpktdata) {
1309  BZ2_bzDecompressEnd(&bzstream);
1310  result = AVERROR(ENOMEM);
1311  goto failed;
1312  }
1313  pkt_data = newpktdata;
1314  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1315  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1316  result = BZ2_bzDecompress(&bzstream);
1317  } while (result == BZ_OK && pkt_size < 10000000);
1318  pkt_size = bzstream.total_out_lo32;
1319  BZ2_bzDecompressEnd(&bzstream);
1320  if (result != BZ_STREAM_END) {
1321  if (result == BZ_MEM_ERROR)
1322  result = AVERROR(ENOMEM);
1323  else
1324  result = AVERROR_INVALIDDATA;
1325  goto failed;
1326  }
1327  break;
1328  }
1329 #endif
1330  default:
1331  return AVERROR_INVALIDDATA;
1332  }
1333 
1334  *buf = pkt_data;
1335  *buf_size = pkt_size;
1336  return 0;
1337 
1338 failed:
1339  av_free(pkt_data);
1340  return result;
1341 }
1342 
1344  AVDictionary **metadata, char *prefix)
1345 {
1346  MatroskaTag *tags = list->elem;
1347  char key[1024];
1348  int i;
1349 
1350  for (i = 0; i < list->nb_elem; i++) {
1351  const char *lang = tags[i].lang &&
1352  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1353 
1354  if (!tags[i].name) {
1355  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1356  continue;
1357  }
1358  if (prefix)
1359  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1360  else
1361  av_strlcpy(key, tags[i].name, sizeof(key));
1362  if (tags[i].def || !lang) {
1363  av_dict_set(metadata, key, tags[i].string, 0);
1364  if (tags[i].sub.nb_elem)
1365  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1366  }
1367  if (lang) {
1368  av_strlcat(key, "-", sizeof(key));
1369  av_strlcat(key, lang, sizeof(key));
1370  av_dict_set(metadata, key, tags[i].string, 0);
1371  if (tags[i].sub.nb_elem)
1372  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1373  }
1374  }
1376 }
1377 
1379 {
1380  MatroskaDemuxContext *matroska = s->priv_data;
1381  MatroskaTags *tags = matroska->tags.elem;
1382  int i, j;
1383 
1384  for (i = 0; i < matroska->tags.nb_elem; i++) {
1385  if (tags[i].target.attachuid) {
1386  MatroskaAttachment *attachment = matroska->attachments.elem;
1387  for (j = 0; j < matroska->attachments.nb_elem; j++)
1388  if (attachment[j].uid == tags[i].target.attachuid &&
1389  attachment[j].stream)
1390  matroska_convert_tag(s, &tags[i].tag,
1391  &attachment[j].stream->metadata, NULL);
1392  } else if (tags[i].target.chapteruid) {
1393  MatroskaChapter *chapter = matroska->chapters.elem;
1394  for (j = 0; j < matroska->chapters.nb_elem; j++)
1395  if (chapter[j].uid == tags[i].target.chapteruid &&
1396  chapter[j].chapter)
1397  matroska_convert_tag(s, &tags[i].tag,
1398  &chapter[j].chapter->metadata, NULL);
1399  } else if (tags[i].target.trackuid) {
1400  MatroskaTrack *track = matroska->tracks.elem;
1401  for (j = 0; j < matroska->tracks.nb_elem; j++)
1402  if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1403  matroska_convert_tag(s, &tags[i].tag,
1404  &track[j].stream->metadata, NULL);
1405  } else {
1406  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1407  tags[i].target.type);
1408  }
1409  }
1410 }
1411 
1413  uint64_t pos)
1414 {
1415  uint32_t level_up = matroska->level_up;
1416  uint32_t saved_id = matroska->current_id;
1417  int64_t before_pos = avio_tell(matroska->ctx->pb);
1419  int64_t offset;
1420  int ret = 0;
1421 
1422  /* seek */
1423  offset = pos + matroska->segment_start;
1424  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1425  /* We don't want to lose our seekhead level, so we add
1426  * a dummy. This is a crude hack. */
1427  if (matroska->num_levels == EBML_MAX_DEPTH) {
1428  av_log(matroska->ctx, AV_LOG_INFO,
1429  "Max EBML element depth (%d) reached, "
1430  "cannot parse further.\n", EBML_MAX_DEPTH);
1431  ret = AVERROR_INVALIDDATA;
1432  } else {
1433  level.start = 0;
1434  level.length = (uint64_t) -1;
1435  matroska->levels[matroska->num_levels] = level;
1436  matroska->num_levels++;
1437  matroska->current_id = 0;
1438 
1439  ret = ebml_parse(matroska, matroska_segment, matroska);
1440 
1441  /* remove dummy level */
1442  while (matroska->num_levels) {
1443  uint64_t length = matroska->levels[--matroska->num_levels].length;
1444  if (length == (uint64_t) -1)
1445  break;
1446  }
1447  }
1448  }
1449  /* seek back */
1450  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1451  matroska->level_up = level_up;
1452  matroska->current_id = saved_id;
1453 
1454  return ret;
1455 }
1456 
1458 {
1459  EbmlList *seekhead_list = &matroska->seekhead;
1460  int i;
1461 
1462  // we should not do any seeking in the streaming case
1463  if (!matroska->ctx->pb->seekable)
1464  return;
1465 
1466  for (i = 0; i < seekhead_list->nb_elem; i++) {
1467  MatroskaSeekhead *seekheads = seekhead_list->elem;
1468  uint32_t id = seekheads[i].id;
1469  uint64_t pos = seekheads[i].pos;
1470 
1471  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1472  if (!elem || elem->parsed)
1473  continue;
1474 
1475  elem->pos = pos;
1476 
1477  // defer cues parsing until we actually need cue data.
1478  if (id == MATROSKA_ID_CUES)
1479  continue;
1480 
1481  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1482  // mark index as broken
1483  matroska->cues_parsing_deferred = -1;
1484  break;
1485  }
1486 
1487  elem->parsed = 1;
1488  }
1489 }
1490 
1492 {
1493  EbmlList *index_list;
1495  uint64_t index_scale = 1;
1496  int i, j;
1497 
1498  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1499  return;
1500 
1501  index_list = &matroska->index;
1502  index = index_list->elem;
1503  if (index_list->nb_elem &&
1504  index[0].time > 1E14 / matroska->time_scale) {
1505  av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1506  index_scale = matroska->time_scale;
1507  }
1508  for (i = 0; i < index_list->nb_elem; i++) {
1509  EbmlList *pos_list = &index[i].pos;
1510  MatroskaIndexPos *pos = pos_list->elem;
1511  for (j = 0; j < pos_list->nb_elem; j++) {
1512  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1513  pos[j].track);
1514  if (track && track->stream)
1515  av_add_index_entry(track->stream,
1516  pos[j].pos + matroska->segment_start,
1517  index[i].time / index_scale, 0, 0,
1519  }
1520  }
1521 }
1522 
1524  int i;
1525 
1526  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1527  return;
1528 
1529  for (i = 0; i < matroska->num_level1_elems; i++) {
1530  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1531  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1532  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1533  matroska->cues_parsing_deferred = -1;
1534  elem->parsed = 1;
1535  break;
1536  }
1537  }
1538 
1539  matroska_add_index_entries(matroska);
1540 }
1541 
1543 {
1544  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1545  int profile;
1546 
1547  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1548  if (strstr(codec_id, aac_profiles[profile]))
1549  break;
1550  return profile + 1;
1551 }
1552 
1553 static int matroska_aac_sri(int samplerate)
1554 {
1555  int sri;
1556 
1557  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1558  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1559  break;
1560  return sri;
1561 }
1562 
1563 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1564 {
1565  char buffer[32];
1566  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1567  time_t creation_time = date_utc / 1000000000 + 978307200;
1568  struct tm tmpbuf, *ptm = gmtime_r(&creation_time, &tmpbuf);
1569  if (!ptm) return;
1570  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1571  av_dict_set(metadata, "creation_time", buffer, 0);
1572 }
1573 
1575  MatroskaTrack *track,
1576  int *offset)
1577 {
1578  AVStream *st = track->stream;
1579  uint8_t *p = track->codec_priv.data;
1580  int size = track->codec_priv.size;
1581 
1582  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1583  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1584  track->codec_priv.size = 0;
1585  return 0;
1586  }
1587  *offset = 8;
1588  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1589 
1590  p += track->codec_priv.size;
1591  size -= track->codec_priv.size;
1592 
1593  /* parse the remaining metadata blocks if present */
1594  while (size >= 4) {
1595  int block_last, block_type, block_size;
1596 
1597  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1598 
1599  p += 4;
1600  size -= 4;
1601  if (block_size > size)
1602  return 0;
1603 
1604  /* check for the channel mask */
1605  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1606  AVDictionary *dict = NULL;
1607  AVDictionaryEntry *chmask;
1608 
1609  ff_vorbis_comment(s, &dict, p, block_size, 0);
1610  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1611  if (chmask) {
1612  uint64_t mask = strtol(chmask->value, NULL, 0);
1613  if (!mask || mask & ~0x3ffffULL) {
1615  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1616  } else
1617  st->codec->channel_layout = mask;
1618  }
1619  av_dict_free(&dict);
1620  }
1621 
1622  p += block_size;
1623  size -= block_size;
1624  }
1625 
1626  return 0;
1627 }
1628 
1630 {
1631  MatroskaDemuxContext *matroska = s->priv_data;
1632  MatroskaTrack *tracks = matroska->tracks.elem;
1633  AVStream *st;
1634  int i, j, ret;
1635  int k;
1636 
1637  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1638  MatroskaTrack *track = &tracks[i];
1640  EbmlList *encodings_list = &track->encodings;
1641  MatroskaTrackEncoding *encodings = encodings_list->elem;
1642  uint8_t *extradata = NULL;
1643  int extradata_size = 0;
1644  int extradata_offset = 0;
1645  uint32_t fourcc = 0;
1646  AVIOContext b;
1647  char* key_id_base64 = NULL;
1648  int bit_depth = -1;
1649 
1650  /* Apply some sanity checks. */
1651  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1652  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1653  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1654  track->type != MATROSKA_TRACK_TYPE_METADATA) {
1655  av_log(matroska->ctx, AV_LOG_INFO,
1656  "Unknown or unsupported track type %"PRIu64"\n",
1657  track->type);
1658  continue;
1659  }
1660  if (!track->codec_id)
1661  continue;
1662 
1663  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
1664  isnan(track->audio.samplerate)) {
1665  av_log(matroska->ctx, AV_LOG_WARNING,
1666  "Invalid sample rate %f, defaulting to 8000 instead.\n",
1667  track->audio.samplerate);
1668  track->audio.samplerate = 8000;
1669  }
1670 
1671  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1672  if (!track->default_duration && track->video.frame_rate > 0)
1673  track->default_duration = 1000000000 / track->video.frame_rate;
1674  if (track->video.display_width == -1)
1675  track->video.display_width = track->video.pixel_width;
1676  if (track->video.display_height == -1)
1677  track->video.display_height = track->video.pixel_height;
1678  if (track->video.color_space.size == 4)
1679  fourcc = AV_RL32(track->video.color_space.data);
1680  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1681  if (!track->audio.out_samplerate)
1682  track->audio.out_samplerate = track->audio.samplerate;
1683  }
1684  if (encodings_list->nb_elem > 1) {
1685  av_log(matroska->ctx, AV_LOG_ERROR,
1686  "Multiple combined encodings not supported");
1687  } else if (encodings_list->nb_elem == 1) {
1688  if (encodings[0].type) {
1689  if (encodings[0].encryption.key_id.size > 0) {
1690  /* Save the encryption key id to be stored later as a
1691  metadata tag. */
1692  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1693  key_id_base64 = av_malloc(b64_size);
1694  if (key_id_base64 == NULL)
1695  return AVERROR(ENOMEM);
1696 
1697  av_base64_encode(key_id_base64, b64_size,
1698  encodings[0].encryption.key_id.data,
1699  encodings[0].encryption.key_id.size);
1700  } else {
1701  encodings[0].scope = 0;
1702  av_log(matroska->ctx, AV_LOG_ERROR,
1703  "Unsupported encoding type");
1704  }
1705  } else if (
1706 #if CONFIG_ZLIB
1707  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1708 #endif
1709 #if CONFIG_BZLIB
1711 #endif
1712 #if CONFIG_LZO
1714 #endif
1716  encodings[0].scope = 0;
1717  av_log(matroska->ctx, AV_LOG_ERROR,
1718  "Unsupported encoding type");
1719  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1720  uint8_t *codec_priv = track->codec_priv.data;
1721  int ret = matroska_decode_buffer(&track->codec_priv.data,
1722  &track->codec_priv.size,
1723  track);
1724  if (ret < 0) {
1725  track->codec_priv.data = NULL;
1726  track->codec_priv.size = 0;
1727  av_log(matroska->ctx, AV_LOG_ERROR,
1728  "Failed to decode codec private data\n");
1729  }
1730 
1731  if (codec_priv != track->codec_priv.data)
1732  av_free(codec_priv);
1733  }
1734  }
1735 
1736  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1737  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1738  strlen(ff_mkv_codec_tags[j].str))) {
1739  codec_id = ff_mkv_codec_tags[j].id;
1740  break;
1741  }
1742  }
1743 
1744  st = track->stream = avformat_new_stream(s, NULL);
1745  if (!st) {
1746  av_free(key_id_base64);
1747  return AVERROR(ENOMEM);
1748  }
1749 
1750  if (key_id_base64) {
1751  /* export encryption key id as base64 metadata tag */
1752  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
1753  av_freep(&key_id_base64);
1754  }
1755 
1756  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1757  track->codec_priv.size >= 40 &&
1758  track->codec_priv.data) {
1759  track->ms_compat = 1;
1760  bit_depth = AV_RL16(track->codec_priv.data + 14);
1761  fourcc = AV_RL32(track->codec_priv.data + 16);
1763  fourcc);
1764  if (!codec_id)
1766  fourcc);
1767  extradata_offset = 40;
1768  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1769  track->codec_priv.size >= 14 &&
1770  track->codec_priv.data) {
1771  int ret;
1772  ffio_init_context(&b, track->codec_priv.data,
1773  track->codec_priv.size,
1774  0, NULL, NULL, NULL, NULL);
1775  ret = ff_get_wav_header(s, &b, st->codec, track->codec_priv.size, 0);
1776  if (ret < 0)
1777  return ret;
1778  codec_id = st->codec->codec_id;
1779  extradata_offset = FFMIN(track->codec_priv.size, 18);
1780  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
1781  && (track->codec_priv.size >= 86)
1782  && (track->codec_priv.data)) {
1783  fourcc = AV_RL32(track->codec_priv.data + 4);
1784  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1786  fourcc = AV_RL32(track->codec_priv.data);
1787  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
1788  }
1789  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1790  (track->codec_priv.size >= 21) &&
1791  (track->codec_priv.data)) {
1792  fourcc = AV_RL32(track->codec_priv.data + 4);
1793  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1795  fourcc = AV_RL32(track->codec_priv.data);
1796  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
1797  }
1798  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI "))
1799  codec_id = AV_CODEC_ID_SVQ3;
1800  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1801  switch (track->audio.bitdepth) {
1802  case 8:
1803  codec_id = AV_CODEC_ID_PCM_U8;
1804  break;
1805  case 24:
1806  codec_id = AV_CODEC_ID_PCM_S24BE;
1807  break;
1808  case 32:
1809  codec_id = AV_CODEC_ID_PCM_S32BE;
1810  break;
1811  }
1812  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1813  switch (track->audio.bitdepth) {
1814  case 8:
1815  codec_id = AV_CODEC_ID_PCM_U8;
1816  break;
1817  case 24:
1818  codec_id = AV_CODEC_ID_PCM_S24LE;
1819  break;
1820  case 32:
1821  codec_id = AV_CODEC_ID_PCM_S32LE;
1822  break;
1823  }
1824  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1825  track->audio.bitdepth == 64) {
1826  codec_id = AV_CODEC_ID_PCM_F64LE;
1827  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1828  int profile = matroska_aac_profile(track->codec_id);
1829  int sri = matroska_aac_sri(track->audio.samplerate);
1830  extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1831  if (!extradata)
1832  return AVERROR(ENOMEM);
1833  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1834  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1835  if (strstr(track->codec_id, "SBR")) {
1836  sri = matroska_aac_sri(track->audio.out_samplerate);
1837  extradata[2] = 0x56;
1838  extradata[3] = 0xE5;
1839  extradata[4] = 0x80 | (sri << 3);
1840  extradata_size = 5;
1841  } else
1842  extradata_size = 2;
1843  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - FF_INPUT_BUFFER_PADDING_SIZE) {
1844  /* Only ALAC's magic cookie is stored in Matroska's track headers.
1845  * Create the "atom size", "tag", and "tag version" fields the
1846  * decoder expects manually. */
1847  extradata_size = 12 + track->codec_priv.size;
1848  extradata = av_mallocz(extradata_size +
1850  if (!extradata)
1851  return AVERROR(ENOMEM);
1852  AV_WB32(extradata, extradata_size);
1853  memcpy(&extradata[4], "alac", 4);
1854  AV_WB32(&extradata[8], 0);
1855  memcpy(&extradata[12], track->codec_priv.data,
1856  track->codec_priv.size);
1857  } else if (codec_id == AV_CODEC_ID_TTA) {
1858  extradata_size = 30;
1859  extradata = av_mallocz(extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1860  if (!extradata)
1861  return AVERROR(ENOMEM);
1862  ffio_init_context(&b, extradata, extradata_size, 1,
1863  NULL, NULL, NULL, NULL);
1864  avio_write(&b, "TTA1", 4);
1865  avio_wl16(&b, 1);
1866  if (track->audio.channels > UINT16_MAX ||
1867  track->audio.bitdepth > UINT16_MAX) {
1868  av_log(matroska->ctx, AV_LOG_WARNING,
1869  "Too large audio channel number %"PRIu64
1870  " or bitdepth %"PRIu64". Skipping track.\n",
1871  track->audio.channels, track->audio.bitdepth);
1872  av_freep(&extradata);
1873  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
1874  return AVERROR_INVALIDDATA;
1875  else
1876  continue;
1877  }
1878  avio_wl16(&b, track->audio.channels);
1879  avio_wl16(&b, track->audio.bitdepth);
1880  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
1881  return AVERROR_INVALIDDATA;
1882  avio_wl32(&b, track->audio.out_samplerate);
1883  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
1884  track->audio.out_samplerate,
1885  AV_TIME_BASE * 1000));
1886  } else if (codec_id == AV_CODEC_ID_RV10 ||
1887  codec_id == AV_CODEC_ID_RV20 ||
1888  codec_id == AV_CODEC_ID_RV30 ||
1889  codec_id == AV_CODEC_ID_RV40) {
1890  extradata_offset = 26;
1891  } else if (codec_id == AV_CODEC_ID_RA_144) {
1892  track->audio.out_samplerate = 8000;
1893  track->audio.channels = 1;
1894  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
1895  codec_id == AV_CODEC_ID_COOK ||
1896  codec_id == AV_CODEC_ID_ATRAC3 ||
1897  codec_id == AV_CODEC_ID_SIPR)
1898  && track->codec_priv.data) {
1899  int flavor;
1900 
1901  ffio_init_context(&b, track->codec_priv.data,
1902  track->codec_priv.size,
1903  0, NULL, NULL, NULL, NULL);
1904  avio_skip(&b, 22);
1905  flavor = avio_rb16(&b);
1906  track->audio.coded_framesize = avio_rb32(&b);
1907  avio_skip(&b, 12);
1908  track->audio.sub_packet_h = avio_rb16(&b);
1909  track->audio.frame_size = avio_rb16(&b);
1910  track->audio.sub_packet_size = avio_rb16(&b);
1911  if (flavor < 0 ||
1912  track->audio.coded_framesize <= 0 ||
1913  track->audio.sub_packet_h <= 0 ||
1914  track->audio.frame_size <= 0 ||
1915  track->audio.sub_packet_size <= 0)
1916  return AVERROR_INVALIDDATA;
1917  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
1918  track->audio.frame_size);
1919  if (!track->audio.buf)
1920  return AVERROR(ENOMEM);
1921  if (codec_id == AV_CODEC_ID_RA_288) {
1922  st->codec->block_align = track->audio.coded_framesize;
1923  track->codec_priv.size = 0;
1924  } else {
1925  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1926  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1927  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1928  st->codec->bit_rate = sipr_bit_rate[flavor];
1929  }
1930  st->codec->block_align = track->audio.sub_packet_size;
1931  extradata_offset = 78;
1932  }
1933  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1934  ret = matroska_parse_flac(s, track, &extradata_offset);
1935  if (ret < 0)
1936  return ret;
1937  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
1938  fourcc = AV_RL32(track->codec_priv.data);
1939  }
1940  track->codec_priv.size -= extradata_offset;
1941 
1942  if (codec_id == AV_CODEC_ID_NONE)
1943  av_log(matroska->ctx, AV_LOG_INFO,
1944  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1945 
1946  if (track->time_scale < 0.01)
1947  track->time_scale = 1.0;
1948  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1949  1000 * 1000 * 1000); /* 64 bit pts in ns */
1950 
1951  /* convert the delay from ns to the track timebase */
1952  track->codec_delay = av_rescale_q(track->codec_delay,
1953  (AVRational){ 1, 1000000000 },
1954  st->time_base);
1955 
1956  st->codec->codec_id = codec_id;
1957 
1958  if (strcmp(track->language, "und"))
1959  av_dict_set(&st->metadata, "language", track->language, 0);
1960  av_dict_set(&st->metadata, "title", track->name, 0);
1961 
1962  if (track->flag_default)
1964  if (track->flag_forced)
1966 
1967  if (!st->codec->extradata) {
1968  if (extradata) {
1969  st->codec->extradata = extradata;
1970  st->codec->extradata_size = extradata_size;
1971  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1972  if (ff_alloc_extradata(st->codec, track->codec_priv.size))
1973  return AVERROR(ENOMEM);
1974  memcpy(st->codec->extradata,
1975  track->codec_priv.data + extradata_offset,
1976  track->codec_priv.size);
1977  }
1978  }
1979 
1980  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1982 
1984  st->codec->codec_tag = fourcc;
1985  if (bit_depth >= 0)
1986  st->codec->bits_per_coded_sample = bit_depth;
1987  st->codec->width = track->video.pixel_width;
1988  st->codec->height = track->video.pixel_height;
1990  &st->sample_aspect_ratio.den,
1991  st->codec->height * track->video.display_width,
1992  st->codec->width * track->video.display_height,
1993  255);
1994  if (st->codec->codec_id != AV_CODEC_ID_HEVC)
1996 
1997  if (track->default_duration) {
1999  1000000000, track->default_duration, 30000);
2000 #if FF_API_R_FRAME_RATE
2001  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2002  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2003  st->r_frame_rate = st->avg_frame_rate;
2004 #endif
2005  }
2006 
2007  /* export stereo mode flag as metadata tag */
2009  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2010 
2011  /* export alpha mode flag as metadata tag */
2012  if (track->video.alpha_mode)
2013  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2014 
2015  /* if we have virtual track, mark the real tracks */
2016  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2017  char buf[32];
2018  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2019  continue;
2020  snprintf(buf, sizeof(buf), "%s_%d",
2021  ff_matroska_video_stereo_plane[planes[j].type], i);
2022  for (k=0; k < matroska->tracks.nb_elem; k++)
2023  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2024  av_dict_set(&tracks[k].stream->metadata,
2025  "stereo_mode", buf, 0);
2026  break;
2027  }
2028  }
2029  // add stream level stereo3d side data if it is a supported format
2031  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2032  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2033  if (ret < 0)
2034  return ret;
2035  }
2036  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2038  st->codec->sample_rate = track->audio.out_samplerate;
2039  st->codec->channels = track->audio.channels;
2040  if (!st->codec->bits_per_coded_sample)
2041  st->codec->bits_per_coded_sample = track->audio.bitdepth;
2042  if (st->codec->codec_id == AV_CODEC_ID_MP3)
2044  else if (st->codec->codec_id != AV_CODEC_ID_AAC)
2046  if (track->codec_delay > 0) {
2047  st->codec->delay = av_rescale_q(track->codec_delay,
2048  st->time_base,
2049  (AVRational){1, st->codec->sample_rate});
2050  }
2051  if (track->seek_preroll > 0) {
2053  av_rescale_q(track->seek_preroll,
2054  (AVRational){1, 1000000000},
2055  (AVRational){1, st->codec->sample_rate}));
2056  }
2057  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2059 
2060  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2062  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2064  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2066  }
2067  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2069  if (st->codec->codec_id == AV_CODEC_ID_ASS)
2070  matroska->contains_ssa = 1;
2071  }
2072  }
2073 
2074  return 0;
2075 }
2076 
2078 {
2079  MatroskaDemuxContext *matroska = s->priv_data;
2080  EbmlList *attachments_list = &matroska->attachments;
2081  EbmlList *chapters_list = &matroska->chapters;
2082  MatroskaAttachment *attachments;
2083  MatroskaChapter *chapters;
2084  uint64_t max_start = 0;
2085  int64_t pos;
2086  Ebml ebml = { 0 };
2087  int i, j, res;
2088 
2089  matroska->ctx = s;
2090  matroska->cues_parsing_deferred = 1;
2091 
2092  /* First read the EBML header. */
2093  if (ebml_parse(matroska, ebml_syntax, &ebml) ||
2094  ebml.version > EBML_VERSION ||
2095  ebml.max_size > sizeof(uint64_t) ||
2096  ebml.id_length > sizeof(uint32_t) ||
2097  ebml.doctype_version > 3 ||
2098  !ebml.doctype) {
2099  av_log(matroska->ctx, AV_LOG_ERROR,
2100  "EBML header using unsupported features\n"
2101  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2102  ebml.version, ebml.doctype, ebml.doctype_version);
2103  ebml_free(ebml_syntax, &ebml);
2104  return AVERROR_PATCHWELCOME;
2105  } else if (ebml.doctype_version == 3) {
2106  av_log(matroska->ctx, AV_LOG_WARNING,
2107  "EBML header using unsupported features\n"
2108  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2109  ebml.version, ebml.doctype, ebml.doctype_version);
2110  }
2111  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2112  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2113  break;
2114  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2115  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2116  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2117  ebml_free(ebml_syntax, &ebml);
2118  return AVERROR_INVALIDDATA;
2119  }
2120  }
2121  ebml_free(ebml_syntax, &ebml);
2122 
2123  /* The next thing is a segment. */
2124  pos = avio_tell(matroska->ctx->pb);
2125  res = ebml_parse(matroska, matroska_segments, matroska);
2126  // try resyncing until we find a EBML_STOP type element.
2127  while (res != 1) {
2128  res = matroska_resync(matroska, pos);
2129  if (res < 0)
2130  return res;
2131  pos = avio_tell(matroska->ctx->pb);
2132  res = ebml_parse(matroska, matroska_segment, matroska);
2133  }
2134  matroska_execute_seekhead(matroska);
2135 
2136  if (!matroska->time_scale)
2137  matroska->time_scale = 1000000;
2138  if (matroska->duration)
2139  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2140  1000 / AV_TIME_BASE;
2141  av_dict_set(&s->metadata, "title", matroska->title, 0);
2142  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2143 
2144  if (matroska->date_utc.size == 8)
2146 
2147  res = matroska_parse_tracks(s);
2148  if (res < 0)
2149  return res;
2150 
2151  attachments = attachments_list->elem;
2152  for (j = 0; j < attachments_list->nb_elem; j++) {
2153  if (!(attachments[j].filename && attachments[j].mime &&
2154  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2155  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2156  } else {
2157  AVStream *st = avformat_new_stream(s, NULL);
2158  if (!st)
2159  break;
2160  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2161  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2163 
2164  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2165  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2166  strlen(ff_mkv_image_mime_tags[i].str))) {
2168  break;
2169  }
2170  }
2171 
2172  if (st->codec->codec_id != AV_CODEC_ID_NONE) {
2175 
2177  if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2178  return res;
2179  memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2180  st->attached_pic.stream_index = st->index;
2182  } else {
2184  if (ff_alloc_extradata(st->codec, attachments[j].bin.size))
2185  break;
2186  memcpy(st->codec->extradata, attachments[j].bin.data,
2187  attachments[j].bin.size);
2188 
2189  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2190  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2191  strlen(ff_mkv_mime_tags[i].str))) {
2192  st->codec->codec_id = ff_mkv_mime_tags[i].id;
2193  break;
2194  }
2195  }
2196  attachments[j].stream = st;
2197  }
2198  }
2199  }
2200 
2201  chapters = chapters_list->elem;
2202  for (i = 0; i < chapters_list->nb_elem; i++)
2203  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2204  (max_start == 0 || chapters[i].start > max_start)) {
2205  chapters[i].chapter =
2206  avpriv_new_chapter(s, chapters[i].uid,
2207  (AVRational) { 1, 1000000000 },
2208  chapters[i].start, chapters[i].end,
2209  chapters[i].title);
2210  if (chapters[i].chapter) {
2211  av_dict_set(&chapters[i].chapter->metadata,
2212  "title", chapters[i].title, 0);
2213  }
2214  max_start = chapters[i].start;
2215  }
2216 
2217  matroska_add_index_entries(matroska);
2218 
2220 
2221  return 0;
2222 }
2223 
2224 /*
2225  * Put one packet in an application-supplied AVPacket struct.
2226  * Returns 0 on success or -1 on failure.
2227  */
2229  AVPacket *pkt)
2230 {
2231  if (matroska->num_packets > 0) {
2232  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2233  av_freep(&matroska->packets[0]);
2234  if (matroska->num_packets > 1) {
2235  void *newpackets;
2236  memmove(&matroska->packets[0], &matroska->packets[1],
2237  (matroska->num_packets - 1) * sizeof(AVPacket *));
2238  newpackets = av_realloc(matroska->packets,
2239  (matroska->num_packets - 1) *
2240  sizeof(AVPacket *));
2241  if (newpackets)
2242  matroska->packets = newpackets;
2243  } else {
2244  av_freep(&matroska->packets);
2245  matroska->prev_pkt = NULL;
2246  }
2247  matroska->num_packets--;
2248  return 0;
2249  }
2250 
2251  return -1;
2252 }
2253 
2254 /*
2255  * Free all packets in our internal queue.
2256  */
2258 {
2259  matroska->prev_pkt = NULL;
2260  if (matroska->packets) {
2261  int n;
2262  for (n = 0; n < matroska->num_packets; n++) {
2263  av_free_packet(matroska->packets[n]);
2264  av_freep(&matroska->packets[n]);
2265  }
2266  av_freep(&matroska->packets);
2267  matroska->num_packets = 0;
2268  }
2269 }
2270 
2272  int *buf_size, int type,
2273  uint32_t **lace_buf, int *laces)
2274 {
2275  int res = 0, n, size = *buf_size;
2276  uint8_t *data = *buf;
2277  uint32_t *lace_size;
2278 
2279  if (!type) {
2280  *laces = 1;
2281  *lace_buf = av_mallocz(sizeof(int));
2282  if (!*lace_buf)
2283  return AVERROR(ENOMEM);
2284 
2285  *lace_buf[0] = size;
2286  return 0;
2287  }
2288 
2289  av_assert0(size > 0);
2290  *laces = *data + 1;
2291  data += 1;
2292  size -= 1;
2293  lace_size = av_mallocz(*laces * sizeof(int));
2294  if (!lace_size)
2295  return AVERROR(ENOMEM);
2296 
2297  switch (type) {
2298  case 0x1: /* Xiph lacing */
2299  {
2300  uint8_t temp;
2301  uint32_t total = 0;
2302  for (n = 0; res == 0 && n < *laces - 1; n++) {
2303  while (1) {
2304  if (size <= total) {
2305  res = AVERROR_INVALIDDATA;
2306  break;
2307  }
2308  temp = *data;
2309  total += temp;
2310  lace_size[n] += temp;
2311  data += 1;
2312  size -= 1;
2313  if (temp != 0xff)
2314  break;
2315  }
2316  }
2317  if (size <= total) {
2318  res = AVERROR_INVALIDDATA;
2319  break;
2320  }
2321 
2322  lace_size[n] = size - total;
2323  break;
2324  }
2325 
2326  case 0x2: /* fixed-size lacing */
2327  if (size % (*laces)) {
2328  res = AVERROR_INVALIDDATA;
2329  break;
2330  }
2331  for (n = 0; n < *laces; n++)
2332  lace_size[n] = size / *laces;
2333  break;
2334 
2335  case 0x3: /* EBML lacing */
2336  {
2337  uint64_t num;
2338  uint64_t total;
2339  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2340  if (n < 0 || num > INT_MAX) {
2341  av_log(matroska->ctx, AV_LOG_INFO,
2342  "EBML block data error\n");
2343  res = n<0 ? n : AVERROR_INVALIDDATA;
2344  break;
2345  }
2346  data += n;
2347  size -= n;
2348  total = lace_size[0] = num;
2349  for (n = 1; res == 0 && n < *laces - 1; n++) {
2350  int64_t snum;
2351  int r;
2352  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2353  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2354  av_log(matroska->ctx, AV_LOG_INFO,
2355  "EBML block data error\n");
2356  res = r<0 ? r : AVERROR_INVALIDDATA;
2357  break;
2358  }
2359  data += r;
2360  size -= r;
2361  lace_size[n] = lace_size[n - 1] + snum;
2362  total += lace_size[n];
2363  }
2364  if (size <= total) {
2365  res = AVERROR_INVALIDDATA;
2366  break;
2367  }
2368  lace_size[*laces - 1] = size - total;
2369  break;
2370  }
2371  }
2372 
2373  *buf = data;
2374  *lace_buf = lace_size;
2375  *buf_size = size;
2376 
2377  return res;
2378 }
2379 
2381  MatroskaTrack *track, AVStream *st,
2382  uint8_t *data, int size, uint64_t timecode,
2383  int64_t pos)
2384 {
2385  int a = st->codec->block_align;
2386  int sps = track->audio.sub_packet_size;
2387  int cfs = track->audio.coded_framesize;
2388  int h = track->audio.sub_packet_h;
2389  int y = track->audio.sub_packet_cnt;
2390  int w = track->audio.frame_size;
2391  int x;
2392 
2393  if (!track->audio.pkt_cnt) {
2394  if (track->audio.sub_packet_cnt == 0)
2395  track->audio.buf_timecode = timecode;
2396  if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2397  if (size < cfs * h / 2) {
2398  av_log(matroska->ctx, AV_LOG_ERROR,
2399  "Corrupt int4 RM-style audio packet size\n");
2400  return AVERROR_INVALIDDATA;
2401  }
2402  for (x = 0; x < h / 2; x++)
2403  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2404  data + x * cfs, cfs);
2405  } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2406  if (size < w) {
2407  av_log(matroska->ctx, AV_LOG_ERROR,
2408  "Corrupt sipr RM-style audio packet size\n");
2409  return AVERROR_INVALIDDATA;
2410  }
2411  memcpy(track->audio.buf + y * w, data, w);
2412  } else {
2413  if (size < sps * w / sps || h<=0 || w%sps) {
2414  av_log(matroska->ctx, AV_LOG_ERROR,
2415  "Corrupt generic RM-style audio packet size\n");
2416  return AVERROR_INVALIDDATA;
2417  }
2418  for (x = 0; x < w / sps; x++)
2419  memcpy(track->audio.buf +
2420  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2421  data + x * sps, sps);
2422  }
2423 
2424  if (++track->audio.sub_packet_cnt >= h) {
2425  if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2426  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2427  track->audio.sub_packet_cnt = 0;
2428  track->audio.pkt_cnt = h * w / a;
2429  }
2430  }
2431 
2432  while (track->audio.pkt_cnt) {
2433  int ret;
2434  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2435  if (!pkt)
2436  return AVERROR(ENOMEM);
2437 
2438  ret = av_new_packet(pkt, a);
2439  if (ret < 0) {
2440  av_free(pkt);
2441  return ret;
2442  }
2443  memcpy(pkt->data,
2444  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2445  a);
2446  pkt->pts = track->audio.buf_timecode;
2448  pkt->pos = pos;
2449  pkt->stream_index = st->index;
2450  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2451  }
2452 
2453  return 0;
2454 }
2455 
2456 /* reconstruct full wavpack blocks from mangled matroska ones */
2458  uint8_t **pdst, int *size)
2459 {
2460  uint8_t *dst = NULL;
2461  int dstlen = 0;
2462  int srclen = *size;
2463  uint32_t samples;
2464  uint16_t ver;
2465  int ret, offset = 0;
2466 
2467  if (srclen < 12 || track->stream->codec->extradata_size < 2)
2468  return AVERROR_INVALIDDATA;
2469 
2470  ver = AV_RL16(track->stream->codec->extradata);
2471 
2472  samples = AV_RL32(src);
2473  src += 4;
2474  srclen -= 4;
2475 
2476  while (srclen >= 8) {
2477  int multiblock;
2478  uint32_t blocksize;
2479  uint8_t *tmp;
2480 
2481  uint32_t flags = AV_RL32(src);
2482  uint32_t crc = AV_RL32(src + 4);
2483  src += 8;
2484  srclen -= 8;
2485 
2486  multiblock = (flags & 0x1800) != 0x1800;
2487  if (multiblock) {
2488  if (srclen < 4) {
2489  ret = AVERROR_INVALIDDATA;
2490  goto fail;
2491  }
2492  blocksize = AV_RL32(src);
2493  src += 4;
2494  srclen -= 4;
2495  } else
2496  blocksize = srclen;
2497 
2498  if (blocksize > srclen) {
2499  ret = AVERROR_INVALIDDATA;
2500  goto fail;
2501  }
2502 
2503  tmp = av_realloc(dst, dstlen + blocksize + 32);
2504  if (!tmp) {
2505  ret = AVERROR(ENOMEM);
2506  goto fail;
2507  }
2508  dst = tmp;
2509  dstlen += blocksize + 32;
2510 
2511  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2512  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2513  AV_WL16(dst + offset + 8, ver); // version
2514  AV_WL16(dst + offset + 10, 0); // track/index_no
2515  AV_WL32(dst + offset + 12, 0); // total samples
2516  AV_WL32(dst + offset + 16, 0); // block index
2517  AV_WL32(dst + offset + 20, samples); // number of samples
2518  AV_WL32(dst + offset + 24, flags); // flags
2519  AV_WL32(dst + offset + 28, crc); // crc
2520  memcpy(dst + offset + 32, src, blocksize); // block data
2521 
2522  src += blocksize;
2523  srclen -= blocksize;
2524  offset += blocksize + 32;
2525  }
2526 
2527  *pdst = dst;
2528  *size = dstlen;
2529 
2530  return 0;
2531 
2532 fail:
2533  av_freep(&dst);
2534  return ret;
2535 }
2536 
2538  MatroskaTrack *track,
2539  AVStream *st,
2540  uint8_t *data, int data_len,
2541  uint64_t timecode,
2542  uint64_t duration,
2543  int64_t pos)
2544 {
2545  AVPacket *pkt;
2546  uint8_t *id, *settings, *text, *buf;
2547  int id_len, settings_len, text_len;
2548  uint8_t *p, *q;
2549  int err;
2550 
2551  if (data_len <= 0)
2552  return AVERROR_INVALIDDATA;
2553 
2554  p = data;
2555  q = data + data_len;
2556 
2557  id = p;
2558  id_len = -1;
2559  while (p < q) {
2560  if (*p == '\r' || *p == '\n') {
2561  id_len = p - id;
2562  if (*p == '\r')
2563  p++;
2564  break;
2565  }
2566  p++;
2567  }
2568 
2569  if (p >= q || *p != '\n')
2570  return AVERROR_INVALIDDATA;
2571  p++;
2572 
2573  settings = p;
2574  settings_len = -1;
2575  while (p < q) {
2576  if (*p == '\r' || *p == '\n') {
2577  settings_len = p - settings;
2578  if (*p == '\r')
2579  p++;
2580  break;
2581  }
2582  p++;
2583  }
2584 
2585  if (p >= q || *p != '\n')
2586  return AVERROR_INVALIDDATA;
2587  p++;
2588 
2589  text = p;
2590  text_len = q - p;
2591  while (text_len > 0) {
2592  const int len = text_len - 1;
2593  const uint8_t c = p[len];
2594  if (c != '\r' && c != '\n')
2595  break;
2596  text_len = len;
2597  }
2598 
2599  if (text_len <= 0)
2600  return AVERROR_INVALIDDATA;
2601 
2602  pkt = av_mallocz(sizeof(*pkt));
2603  if (!pkt)
2604  return AVERROR(ENOMEM);
2605  err = av_new_packet(pkt, text_len);
2606  if (err < 0) {
2607  av_free(pkt);
2608  return AVERROR(err);
2609  }
2610 
2611  memcpy(pkt->data, text, text_len);
2612 
2613  if (id_len > 0) {
2614  buf = av_packet_new_side_data(pkt,
2616  id_len);
2617  if (!buf) {
2618  av_free(pkt);
2619  return AVERROR(ENOMEM);
2620  }
2621  memcpy(buf, id, id_len);
2622  }
2623 
2624  if (settings_len > 0) {
2625  buf = av_packet_new_side_data(pkt,
2627  settings_len);
2628  if (!buf) {
2629  av_free(pkt);
2630  return AVERROR(ENOMEM);
2631  }
2632  memcpy(buf, settings, settings_len);
2633  }
2634 
2635  // Do we need this for subtitles?
2636  // pkt->flags = AV_PKT_FLAG_KEY;
2637 
2638  pkt->stream_index = st->index;
2639  pkt->pts = timecode;
2640 
2641  // Do we need this for subtitles?
2642  // pkt->dts = timecode;
2643 
2644  pkt->duration = duration;
2645  pkt->pos = pos;
2646 
2647  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2648  matroska->prev_pkt = pkt;
2649 
2650  return 0;
2651 }
2652 
2654  MatroskaTrack *track, AVStream *st,
2655  uint8_t *data, int pkt_size,
2656  uint64_t timecode, uint64_t lace_duration,
2657  int64_t pos, int is_keyframe,
2658  uint8_t *additional, uint64_t additional_id, int additional_size,
2659  int64_t discard_padding)
2660 {
2661  MatroskaTrackEncoding *encodings = track->encodings.elem;
2662  uint8_t *pkt_data = data;
2663  int offset = 0, res;
2664  AVPacket *pkt;
2665 
2666  if (encodings && !encodings->type && encodings->scope & 1) {
2667  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2668  if (res < 0)
2669  return res;
2670  }
2671 
2672  if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2673  uint8_t *wv_data;
2674  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2675  if (res < 0) {
2676  av_log(matroska->ctx, AV_LOG_ERROR,
2677  "Error parsing a wavpack block.\n");
2678  goto fail;
2679  }
2680  if (pkt_data != data)
2681  av_freep(&pkt_data);
2682  pkt_data = wv_data;
2683  }
2684 
2685  if (st->codec->codec_id == AV_CODEC_ID_PRORES &&
2686  AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
2687  offset = 8;
2688 
2689  pkt = av_mallocz(sizeof(AVPacket));
2690  if (!pkt)
2691  return AVERROR(ENOMEM);
2692  /* XXX: prevent data copy... */
2693  if (av_new_packet(pkt, pkt_size + offset) < 0) {
2694  av_free(pkt);
2695  res = AVERROR(ENOMEM);
2696  goto fail;
2697  }
2698 
2699  if (st->codec->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
2700  uint8_t *buf = pkt->data;
2701  bytestream_put_be32(&buf, pkt_size);
2702  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2703  }
2704 
2705  memcpy(pkt->data + offset, pkt_data, pkt_size);
2706 
2707  if (pkt_data != data)
2708  av_freep(&pkt_data);
2709 
2710  pkt->flags = is_keyframe;
2711  pkt->stream_index = st->index;
2712 
2713  if (additional_size > 0) {
2714  uint8_t *side_data = av_packet_new_side_data(pkt,
2716  additional_size + 8);
2717  if (!side_data) {
2718  av_free_packet(pkt);
2719  av_free(pkt);
2720  return AVERROR(ENOMEM);
2721  }
2722  AV_WB64(side_data, additional_id);
2723  memcpy(side_data + 8, additional, additional_size);
2724  }
2725 
2726  if (discard_padding) {
2727  uint8_t *side_data = av_packet_new_side_data(pkt,
2729  10);
2730  if (!side_data) {
2731  av_free_packet(pkt);
2732  av_free(pkt);
2733  return AVERROR(ENOMEM);
2734  }
2735  AV_WL32(side_data, 0);
2736  AV_WL32(side_data + 4, av_rescale_q(discard_padding,
2737  (AVRational){1, 1000000000},
2738  (AVRational){1, st->codec->sample_rate}));
2739  }
2740 
2741  if (track->ms_compat)
2742  pkt->dts = timecode;
2743  else
2744  pkt->pts = timecode;
2745  pkt->pos = pos;
2746  if (st->codec->codec_id == AV_CODEC_ID_SUBRIP) {
2747  /*
2748  * For backward compatibility.
2749  * Historically, we have put subtitle duration
2750  * in convergence_duration, on the off chance
2751  * that the time_scale is less than 1us, which
2752  * could result in a 32bit overflow on the
2753  * normal duration field.
2754  */
2755  pkt->convergence_duration = lace_duration;
2756  }
2757 
2758  if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE ||
2759  lace_duration <= INT_MAX) {
2760  /*
2761  * For non subtitle tracks, just store the duration
2762  * as normal.
2763  *
2764  * If it's a subtitle track and duration value does
2765  * not overflow a uint32, then also store it normally.
2766  */
2767  pkt->duration = lace_duration;
2768  }
2769 
2770  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2771  matroska->prev_pkt = pkt;
2772 
2773  return 0;
2774 
2775 fail:
2776  if (pkt_data != data)
2777  av_freep(&pkt_data);
2778  return res;
2779 }
2780 
2782  int size, int64_t pos, uint64_t cluster_time,
2783  uint64_t block_duration, int is_keyframe,
2784  uint8_t *additional, uint64_t additional_id, int additional_size,
2785  int64_t cluster_pos, int64_t discard_padding)
2786 {
2787  uint64_t timecode = AV_NOPTS_VALUE;
2788  MatroskaTrack *track;
2789  int res = 0;
2790  AVStream *st;
2791  int16_t block_time;
2792  uint32_t *lace_size = NULL;
2793  int n, flags, laces = 0;
2794  uint64_t num;
2795  int trust_default_duration = 1;
2796 
2797  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2798  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2799  return n;
2800  }
2801  data += n;
2802  size -= n;
2803 
2804  track = matroska_find_track_by_num(matroska, num);
2805  if (!track || !track->stream) {
2806  av_log(matroska->ctx, AV_LOG_INFO,
2807  "Invalid stream %"PRIu64" or size %u\n", num, size);
2808  return AVERROR_INVALIDDATA;
2809  } else if (size <= 3)
2810  return 0;
2811  st = track->stream;
2812  if (st->discard >= AVDISCARD_ALL)
2813  return res;
2814  av_assert1(block_duration != AV_NOPTS_VALUE);
2815 
2816  block_time = sign_extend(AV_RB16(data), 16);
2817  data += 2;
2818  flags = *data++;
2819  size -= 3;
2820  if (is_keyframe == -1)
2821  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2822 
2823  if (cluster_time != (uint64_t) -1 &&
2824  (block_time >= 0 || cluster_time >= -block_time)) {
2825  timecode = cluster_time + block_time - track->codec_delay;
2826  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2827  timecode < track->end_timecode)
2828  is_keyframe = 0; /* overlapping subtitles are not key frame */
2829  if (is_keyframe)
2830  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2832  }
2833 
2834  if (matroska->skip_to_keyframe &&
2835  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2836  if (timecode < matroska->skip_to_timecode)
2837  return res;
2838  if (is_keyframe)
2839  matroska->skip_to_keyframe = 0;
2840  else if (!st->skip_to_keyframe) {
2841  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
2842  matroska->skip_to_keyframe = 0;
2843  }
2844  }
2845 
2846  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2847  &lace_size, &laces);
2848 
2849  if (res)
2850  goto end;
2851 
2852  if (track->audio.samplerate == 8000) {
2853  // If this is needed for more codecs, then add them here
2854  if (st->codec->codec_id == AV_CODEC_ID_AC3) {
2855  if (track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
2856  trust_default_duration = 0;
2857  }
2858  }
2859 
2860  if (!block_duration && trust_default_duration)
2861  block_duration = track->default_duration * laces / matroska->time_scale;
2862 
2863  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
2864  track->end_timecode =
2865  FFMAX(track->end_timecode, timecode + block_duration);
2866 
2867  for (n = 0; n < laces; n++) {
2868  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
2869 
2870  if (lace_size[n] > size) {
2871  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
2872  break;
2873  }
2874 
2875  if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2876  st->codec->codec_id == AV_CODEC_ID_COOK ||
2877  st->codec->codec_id == AV_CODEC_ID_SIPR ||
2878  st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2879  st->codec->block_align && track->audio.sub_packet_size) {
2880  res = matroska_parse_rm_audio(matroska, track, st, data,
2881  lace_size[n],
2882  timecode, pos);
2883  if (res)
2884  goto end;
2885 
2886  } else if (st->codec->codec_id == AV_CODEC_ID_WEBVTT) {
2887  res = matroska_parse_webvtt(matroska, track, st,
2888  data, lace_size[n],
2889  timecode, lace_duration,
2890  pos);
2891  if (res)
2892  goto end;
2893  } else {
2894  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2895  timecode, lace_duration, pos,
2896  !n ? is_keyframe : 0,
2897  additional, additional_id, additional_size,
2898  discard_padding);
2899  if (res)
2900  goto end;
2901  }
2902 
2903  if (timecode != AV_NOPTS_VALUE)
2904  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
2905  data += lace_size[n];
2906  size -= lace_size[n];
2907  }
2908 
2909 end:
2910  av_free(lace_size);
2911  return res;
2912 }
2913 
2915 {
2916  EbmlList *blocks_list;
2917  MatroskaBlock *blocks;
2918  int i, res;
2919  res = ebml_parse(matroska,
2920  matroska_cluster_incremental_parsing,
2921  &matroska->current_cluster);
2922  if (res == 1) {
2923  /* New Cluster */
2924  if (matroska->current_cluster_pos)
2925  ebml_level_end(matroska);
2926  ebml_free(matroska_cluster, &matroska->current_cluster);
2927  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2928  matroska->current_cluster_num_blocks = 0;
2929  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2930  matroska->prev_pkt = NULL;
2931  /* sizeof the ID which was already read */
2932  if (matroska->current_id)
2933  matroska->current_cluster_pos -= 4;
2934  res = ebml_parse(matroska,
2935  matroska_clusters_incremental,
2936  &matroska->current_cluster);
2937  /* Try parsing the block again. */
2938  if (res == 1)
2939  res = ebml_parse(matroska,
2940  matroska_cluster_incremental_parsing,
2941  &matroska->current_cluster);
2942  }
2943 
2944  if (!res &&
2945  matroska->current_cluster_num_blocks <
2946  matroska->current_cluster.blocks.nb_elem) {
2947  blocks_list = &matroska->current_cluster.blocks;
2948  blocks = blocks_list->elem;
2949 
2950  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2951  i = blocks_list->nb_elem - 1;
2952  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2953  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2954  uint8_t* additional = blocks[i].additional.size > 0 ?
2955  blocks[i].additional.data : NULL;
2956  if (!blocks[i].non_simple)
2957  blocks[i].duration = 0;
2958  res = matroska_parse_block(matroska, blocks[i].bin.data,
2959  blocks[i].bin.size, blocks[i].bin.pos,
2960  matroska->current_cluster.timecode,
2961  blocks[i].duration, is_keyframe,
2962  additional, blocks[i].additional_id,
2963  blocks[i].additional.size,
2964  matroska->current_cluster_pos,
2965  blocks[i].discard_padding);
2966  }
2967  }
2968 
2969  return res;
2970 }
2971 
2973 {
2974  MatroskaCluster cluster = { 0 };
2975  EbmlList *blocks_list;
2976  MatroskaBlock *blocks;
2977  int i, res;
2978  int64_t pos;
2979 
2980  if (!matroska->contains_ssa)
2981  return matroska_parse_cluster_incremental(matroska);
2982  pos = avio_tell(matroska->ctx->pb);
2983  matroska->prev_pkt = NULL;
2984  if (matroska->current_id)
2985  pos -= 4; /* sizeof the ID which was already read */
2986  res = ebml_parse(matroska, matroska_clusters, &cluster);
2987  blocks_list = &cluster.blocks;
2988  blocks = blocks_list->elem;
2989  for (i = 0; i < blocks_list->nb_elem; i++)
2990  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2991  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2992  res = matroska_parse_block(matroska, blocks[i].bin.data,
2993  blocks[i].bin.size, blocks[i].bin.pos,
2994  cluster.timecode, blocks[i].duration,
2995  is_keyframe, NULL, 0, 0, pos,
2996  blocks[i].discard_padding);
2997  }
2998  ebml_free(matroska_cluster, &cluster);
2999  return res;
3000 }
3001 
3003 {
3004  MatroskaDemuxContext *matroska = s->priv_data;
3005 
3006  while (matroska_deliver_packet(matroska, pkt)) {
3007  int64_t pos = avio_tell(matroska->ctx->pb);
3008  if (matroska->done)
3009  return AVERROR_EOF;
3010  if (matroska_parse_cluster(matroska) < 0)
3011  matroska_resync(matroska, pos);
3012  }
3013 
3014  return 0;
3015 }
3016 
3017 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3018  int64_t timestamp, int flags)
3019 {
3020  MatroskaDemuxContext *matroska = s->priv_data;
3021  MatroskaTrack *tracks = NULL;
3022  AVStream *st = s->streams[stream_index];
3023  int i, index, index_sub, index_min;
3024 
3025  /* Parse the CUES now since we need the index data to seek. */
3026  if (matroska->cues_parsing_deferred > 0) {
3027  matroska->cues_parsing_deferred = 0;
3028  matroska_parse_cues(matroska);
3029  }
3030 
3031  if (!st->nb_index_entries)
3032  goto err;
3033  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3034 
3035  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3036  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3037  SEEK_SET);
3038  matroska->current_id = 0;
3039  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3040  matroska_clear_queue(matroska);
3041  if (matroska_parse_cluster(matroska) < 0)
3042  break;
3043  }
3044  }
3045 
3046  matroska_clear_queue(matroska);
3047  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3048  goto err;
3049 
3050  index_min = index;
3051  tracks = matroska->tracks.elem;
3052  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3053  tracks[i].audio.pkt_cnt = 0;
3054  tracks[i].audio.sub_packet_cnt = 0;
3055  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3056  tracks[i].end_timecode = 0;
3057  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3058  tracks[i].stream &&
3059  tracks[i].stream->discard != AVDISCARD_ALL) {
3060  index_sub = av_index_search_timestamp(
3061  tracks[i].stream, st->index_entries[index].timestamp,
3063  while (index_sub >= 0 &&
3064  index_min > 0 &&
3065  tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3066  st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3067  index_min--;
3068  }
3069  }
3070 
3071  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3072  matroska->current_id = 0;
3073  if (flags & AVSEEK_FLAG_ANY) {
3074  st->skip_to_keyframe = 0;
3075  matroska->skip_to_timecode = timestamp;
3076  } else {
3077  st->skip_to_keyframe = 1;
3078  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3079  }
3080  matroska->skip_to_keyframe = 1;
3081  matroska->done = 0;
3082  matroska->num_levels = 0;
3083  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3084  return 0;
3085 err:
3086  // slightly hackish but allows proper fallback to
3087  // the generic seeking code.
3088  matroska_clear_queue(matroska);
3089  matroska->current_id = 0;
3090  st->skip_to_keyframe =
3091  matroska->skip_to_keyframe = 0;
3092  matroska->done = 0;
3093  matroska->num_levels = 0;
3094  return -1;
3095 }
3096 
3098 {
3099  MatroskaDemuxContext *matroska = s->priv_data;
3100  MatroskaTrack *tracks = matroska->tracks.elem;
3101  int n;
3102 
3103  matroska_clear_queue(matroska);
3104 
3105  for (n = 0; n < matroska->tracks.nb_elem; n++)
3106  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3107  av_freep(&tracks[n].audio.buf);
3108  ebml_free(matroska_cluster, &matroska->current_cluster);
3109  ebml_free(matroska_segment, matroska);
3110 
3111  return 0;
3112 }
3113 
3114 typedef struct {
3115  int64_t start_time_ns;
3116  int64_t end_time_ns;
3117  int64_t start_offset;
3118  int64_t end_offset;
3119 } CueDesc;
3120 
3121 /* This function searches all the Cues and returns the CueDesc corresponding the
3122  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3123  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3124  */
3125 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3126  MatroskaDemuxContext *matroska = s->priv_data;
3127  CueDesc cue_desc;
3128  int i;
3129  int nb_index_entries = s->streams[0]->nb_index_entries;
3130  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3131  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3132  for (i = 1; i < nb_index_entries; i++) {
3133  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3134  index_entries[i].timestamp * matroska->time_scale > ts) {
3135  break;
3136  }
3137  }
3138  --i;
3139  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3140  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3141  if (i != nb_index_entries - 1) {
3142  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3143  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3144  } else {
3145  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3146  // FIXME: this needs special handling for files where Cues appear
3147  // before Clusters. the current logic assumes Cues appear after
3148  // Clusters.
3149  cue_desc.end_offset = cues_start - matroska->segment_start;
3150  }
3151  return cue_desc;
3152 }
3153 
3155 {
3156  MatroskaDemuxContext *matroska = s->priv_data;
3157  int64_t cluster_pos, before_pos;
3158  int index, rv = 1;
3159  if (s->streams[0]->nb_index_entries <= 0) return 0;
3160  // seek to the first cluster using cues.
3161  index = av_index_search_timestamp(s->streams[0], 0, 0);
3162  if (index < 0) return 0;
3163  cluster_pos = s->streams[0]->index_entries[index].pos;
3164  before_pos = avio_tell(s->pb);
3165  while (1) {
3166  int64_t cluster_id = 0, cluster_length = 0;
3167  AVPacket *pkt;
3168  avio_seek(s->pb, cluster_pos, SEEK_SET);
3169  // read cluster id and length
3170  ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3171  ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3172  if (cluster_id != 0xF43B675) { // done with all clusters
3173  break;
3174  }
3175  avio_seek(s->pb, cluster_pos, SEEK_SET);
3176  matroska->current_id = 0;
3177  matroska_clear_queue(matroska);
3178  if (matroska_parse_cluster(matroska) < 0 ||
3179  matroska->num_packets <= 0) {
3180  break;
3181  }
3182  pkt = matroska->packets[0];
3183  cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3184  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3185  rv = 0;
3186  break;
3187  }
3188  }
3189  avio_seek(s->pb, before_pos, SEEK_SET);
3190  return rv;
3191 }
3192 
3193 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3194  double min_buffer, double* buffer,
3195  double* sec_to_download, AVFormatContext *s,
3196  int64_t cues_start)
3197 {
3198  double nano_seconds_per_second = 1000000000.0;
3199  double time_sec = time_ns / nano_seconds_per_second;
3200  int rv = 0;
3201  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3202  int64_t end_time_ns = time_ns + time_to_search_ns;
3203  double sec_downloaded = 0.0;
3204  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3205  if (desc_curr.start_time_ns == -1)
3206  return -1;
3207  *sec_to_download = 0.0;
3208 
3209  // Check for non cue start time.
3210  if (time_ns > desc_curr.start_time_ns) {
3211  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3212  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3213  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3214  double timeToDownload = (cueBytes * 8.0) / bps;
3215 
3216  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3217  *sec_to_download += timeToDownload;
3218 
3219  // Check if the search ends within the first cue.
3220  if (desc_curr.end_time_ns >= end_time_ns) {
3221  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3222  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3223  sec_downloaded = percent_to_sub * sec_downloaded;
3224  *sec_to_download = percent_to_sub * *sec_to_download;
3225  }
3226 
3227  if ((sec_downloaded + *buffer) <= min_buffer) {
3228  return 1;
3229  }
3230 
3231  // Get the next Cue.
3232  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3233  }
3234 
3235  while (desc_curr.start_time_ns != -1) {
3236  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3237  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3238  double desc_sec = desc_ns / nano_seconds_per_second;
3239  double bits = (desc_bytes * 8.0);
3240  double time_to_download = bits / bps;
3241 
3242  sec_downloaded += desc_sec - time_to_download;
3243  *sec_to_download += time_to_download;
3244 
3245  if (desc_curr.end_time_ns >= end_time_ns) {
3246  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3247  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3248  sec_downloaded = percent_to_sub * sec_downloaded;
3249  *sec_to_download = percent_to_sub * *sec_to_download;
3250 
3251  if ((sec_downloaded + *buffer) <= min_buffer)
3252  rv = 1;
3253  break;
3254  }
3255 
3256  if ((sec_downloaded + *buffer) <= min_buffer) {
3257  rv = 1;
3258  break;
3259  }
3260 
3261  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3262  }
3263  *buffer = *buffer + sec_downloaded;
3264  return rv;
3265 }
3266 
3267 /* This function computes the bandwidth of the WebM file with the help of
3268  * buffer_size_after_time_downloaded() function. Both of these functions are
3269  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3270  * Matroska parsing mechanism.
3271  *
3272  * Returns the bandwidth of the file on success; -1 on error.
3273  * */
3274 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3275 {
3276  MatroskaDemuxContext *matroska = s->priv_data;
3277  AVStream *st = s->streams[0];
3278  double bandwidth = 0.0;
3279  int i;
3280 
3281  for (i = 0; i < st->nb_index_entries; i++) {
3282  int64_t prebuffer_ns = 1000000000;
3283  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3284  double nano_seconds_per_second = 1000000000.0;
3285  int64_t prebuffered_ns = time_ns + prebuffer_ns;
3286  double prebuffer_bytes = 0.0;
3287  int64_t temp_prebuffer_ns = prebuffer_ns;
3288  int64_t pre_bytes, pre_ns;
3289  double pre_sec, prebuffer, bits_per_second;
3290  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3291 
3292  // Start with the first Cue.
3293  CueDesc desc_end = desc_beg;
3294 
3295  // Figure out how much data we have downloaded for the prebuffer. This will
3296  // be used later to adjust the bits per sample to try.
3297  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3298  // Prebuffered the entire Cue.
3299  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3300  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3301  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3302  }
3303  if (desc_end.start_time_ns == -1) {
3304  // The prebuffer is larger than the duration.
3305  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3306  return -1;
3307  bits_per_second = 0.0;
3308  } else {
3309  // The prebuffer ends in the last Cue. Estimate how much data was
3310  // prebuffered.
3311  pre_bytes = desc_end.end_offset - desc_end.start_offset;
3312  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3313  pre_sec = pre_ns / nano_seconds_per_second;
3314  prebuffer_bytes +=
3315  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3316 
3317  prebuffer = prebuffer_ns / nano_seconds_per_second;
3318 
3319  // Set this to 0.0 in case our prebuffer buffers the entire video.
3320  bits_per_second = 0.0;
3321  do {
3322  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3323  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3324  double desc_sec = desc_ns / nano_seconds_per_second;
3325  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3326 
3327  // Drop the bps by the percentage of bytes buffered.
3328  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3329  double mod_bits_per_second = calc_bits_per_second * percent;
3330 
3331  if (prebuffer < desc_sec) {
3332  double search_sec =
3333  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3334 
3335  // Add 1 so the bits per second should be a little bit greater than file
3336  // datarate.
3337  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3338  const double min_buffer = 0.0;
3339  double buffer = prebuffer;
3340  double sec_to_download = 0.0;
3341 
3342  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3343  min_buffer, &buffer, &sec_to_download,
3344  s, cues_start);
3345  if (rv < 0) {
3346  return -1;
3347  } else if (rv == 0) {
3348  bits_per_second = (double)(bps);
3349  break;
3350  }
3351  }
3352 
3353  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3354  } while (desc_end.start_time_ns != -1);
3355  }
3356  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3357  }
3358  return (int64_t)bandwidth;
3359 }
3360 
3362 {
3363  MatroskaDemuxContext *matroska = s->priv_data;
3364  EbmlList *seekhead_list = &matroska->seekhead;
3365  MatroskaSeekhead *seekhead = seekhead_list->elem;
3366  char *buf;
3367  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3368  int i;
3369 
3370  // determine cues start and end positions
3371  for (i = 0; i < seekhead_list->nb_elem; i++)
3372  if (seekhead[i].id == MATROSKA_ID_CUES)
3373  break;
3374 
3375  if (i >= seekhead_list->nb_elem) return -1;
3376 
3377  before_pos = avio_tell(matroska->ctx->pb);
3378  cues_start = seekhead[i].pos + matroska->segment_start;
3379  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3380  // cues_end is computed as cues_start + cues_length + length of the
3381  // Cues element ID + EBML length of the Cues element. cues_end is
3382  // inclusive and the above sum is reduced by 1.
3383  uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3384  bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3385  bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3386  cues_end = cues_start + cues_length + bytes_read - 1;
3387  }
3388  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3389  if (cues_start == -1 || cues_end == -1) return -1;
3390 
3391  // parse the cues
3392  matroska_parse_cues(matroska);
3393 
3394  // cues start
3395  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3396 
3397  // cues end
3398  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3399 
3400  // bandwidth
3401  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3402  if (bandwidth < 0) return -1;
3403  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3404 
3405  // check if all clusters start with key frames
3407 
3408  // store cue point timestamps as a comma separated list for checking subsegment alignment in
3409  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3410  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3411  if (!buf) return -1;
3412  strcpy(buf, "");
3413  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3414  snprintf(buf, (i + 1) * 20 * sizeof(char),
3415  "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3416  if (i != s->streams[0]->nb_index_entries - 1)
3417  strncat(buf, ",", sizeof(char));
3418  }
3419  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3420  av_free(buf);
3421 
3422  return 0;
3423 }
3424 
3426 {
3427  char *buf;
3428  int ret = matroska_read_header(s);
3429  MatroskaTrack *tracks;
3430  MatroskaDemuxContext *matroska = s->priv_data;
3431  if (ret) {
3432  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3433  return -1;
3434  }
3435 
3436  // initialization range
3437  // 5 is the offset of Cluster ID.
3439 
3440  // basename of the file
3441  buf = strrchr(s->filename, '/');
3442  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3443 
3444  // duration
3445  buf = av_asprintf("%g", matroska->duration);
3446  if (!buf) return AVERROR(ENOMEM);
3447  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3448  av_free(buf);
3449 
3450  // track number
3451  tracks = matroska->tracks.elem;
3452  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3453 
3454  // parse the cues and populate Cue related fields
3455  return webm_dash_manifest_cues(s);
3456 }
3457 
3459 {
3460  return AVERROR_EOF;
3461 }
3462 
3464  .name = "matroska,webm",
3465  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3466  .extensions = "mkv,mk3d,mka,mks",
3467  .priv_data_size = sizeof(MatroskaDemuxContext),
3473  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3474 };
3475 
3477  .name = "webm_dash_manifest",
3478  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3479  .priv_data_size = sizeof(MatroskaDemuxContext),
3483 };
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
const char * s
Definition: matroskadec.c:89
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2200
#define AV_DISPOSITION_METADATA
Definition: avformat.h:791
#define NULL
Definition: coverity.c:32
static EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:523
#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:418
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:2380
const char * s
Definition: avisynth_c.h:669
Bytestream IO Context.
Definition: avio.h:68
#define MATROSKA_ID_VIDEOFLAGINTERLACED
Definition: matroska.h:121
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
uint64_t seek_preroll
Definition: matroskadec.c:179
const char *const ff_matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT]
Definition: matroska.c:145
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1378
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:281
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1093
uint64_t type
Definition: matroskadec.c:170
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:101
static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3458
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2228
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
uint64_t version
Definition: matroskadec.c:106
static EbmlSyntax matroska_blockmore[]
Definition: matroskadec.c:581
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:3463
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static int is_keyframe(NalUnitType naltype)
Definition: libx265.c:49
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:1734
enum AVCodecID id
Definition: mxfenc.c:95
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:156
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2705
#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:181
static int ebml_level_end(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:689
#define INITIALIZATION_RANGE
Definition: matroska.h:289
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1185
#define AV_RB64
Definition: intreadwrite.h:164
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:910
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3154
else temp
Definition: vf_mcdeint.c:257
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:3997
int64_t pos
Definition: avformat.h:749
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:137
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:131
uint64_t chapteruid
Definition: matroskadec.c:232
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2202
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:317
EbmlList tag
Definition: matroskadec.c:238
uint64_t uid
Definition: matroskadec.c:169
static EbmlSyntax matroska_segments[]
Definition: matroskadec.c:576
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
MatroskaCluster current_cluster
Definition: matroskadec.c:306
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:2653
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:879
#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:808
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:189
const char * b
Definition: vf_curves.c:109
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:203
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:210
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1011
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:201
uint64_t flag_forced
Definition: matroskadec.c:178
uint64_t max_size
Definition: matroskadec.c:107
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:177
#define AV_RL16
Definition: intreadwrite.h:42
uint64_t flag_default
Definition: matroskadec.c:177
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional FF_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:139
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:124
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:132
char * name
Definition: matroskadec.c:221
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:276
#define FF_ARRAY_ELEMS(a)
int version
Definition: avisynth_c.h:667
discard all
Definition: avcodec.h:667
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:267
static EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:368
static AVPacket pkt
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:160
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:666
MatroskaTrackAudio audio
Definition: matroskadec.c:181
uint64_t duration
Definition: matroskadec.c:313
const struct EbmlSyntax * n
Definition: matroskadec.c:90
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:223
#define MATROSKA_ID_CLUSTERTIMECODE
Definition: matroska.h:188
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2020
static EbmlSyntax matroska_tag[]
Definition: matroskadec.c:542
#define MATROSKA_ID_ENCODINGENCALGO
Definition: matroska.h:144
static EbmlSyntax matroska_attachment[]
Definition: matroskadec.c:457
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:217
static EbmlSyntax matroska_track[]
Definition: matroskadec.c:422
#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:3759
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:207
Format I/O context.
Definition: avformat.h:1226
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:224
UID uid
Definition: mxfenc.c:1617
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:1648
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:106
#define MATROSKA_ID_CODECDOWNLOADURL
Definition: matroska.h:92
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
int64_t end_timecode
Definition: matroskadec.c:187
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:3425
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
Definition: matroskadec.c:790
static EbmlSyntax matroska_track_operation[]
Definition: matroskadec.c:417
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1339
Public dictionary API.
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:177
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:994
uint64_t pixel_height
Definition: matroskadec.c:135
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:318
if()
Definition: avfilter.c:975
uint8_t bits
Definition: crc.c:295
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint8_t
#define MATROSKA_ID_CHAPLANG
Definition: matroska.h:220
#define av_malloc(s)
uint64_t stereo_mode
Definition: matroskadec.c:137
MatroskaTrackOperation operation
Definition: matroskadec.c:182
MatroskaTrackVideo video
Definition: matroskadec.c:180
#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:3125
void * elem
Definition: matroskadec.c:96
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:97
MatroskaTrackCompression compression
Definition: matroskadec.c:126
uint8_t * data
Definition: matroskadec.c:101
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:3361
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:70
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:681
uint64_t time
Definition: matroskadec.c:216
#define AV_RB32
Definition: intreadwrite.h:130
int ff_mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
Definition: matroska.c:151
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:117
#define TRACK_NUMBER
Definition: matroska.h:297
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1553
enum AVStreamParseType need_parsing
Definition: avformat.h:1000
#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
static EbmlSyntax matroska_cluster[]
Definition: matroskadec.c:604
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1353
AVStream * stream
Definition: matroskadec.c:198
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3663
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
char * language
Definition: matroskadec.c:174
#define MATROSKA_ID_BLOCKMORE
Definition: matroska.h:193
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1294
#define MATROSKA_ID_CUERELATIVEPOSITION
Definition: matroska.h:161
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:129
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:1337
uint8_t * data
Definition: avcodec.h:1160
uint64_t typevalue
Definition: matroskadec.c:230
uint64_t codec_delay
Definition: matroskadec.c:184
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2914
#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:1332
int64_t start_time_ns
Definition: matroskadec.c:3115
static EbmlSyntax ebml_header[]
Definition: matroskadec.c:322
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define MATROSKA_ID_CODECDECODEALL
Definition: matroska.h:93
#define MATROSKA_ID_ENCODINGENCRYPTION
Definition: matroska.h:142
enum AVCodecID id
Definition: internal.h:47
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
const uint8_t ff_log2_tab[256]
Definition: log2_tab.c:23
#define MATROSKA_ID_CUES
Definition: matroska.h:58
#define EBML_MAX_DEPTH
Definition: matroska.h:277
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:748
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:273
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:2718
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
static int64_t duration
Definition: ffplay.c:320
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:177
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1178
#define MATROSKA_ID_SEGMENTUID
Definition: matroska.h:72
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:537
#define AV_DISPOSITION_CAPTIONS
To specify text track kind (different from subtitles default).
Definition: avformat.h:789
static EbmlSyntax matroska_tracks[]
Definition: matroskadec.c:452
EbmlList sub
Definition: matroskadec.c:225
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, uint64_t pos)
Definition: matroskadec.c:1412
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1206
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2972
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:959
#define MATROSKA_ID_CUEBLOCKNUMBER
Definition: matroska.h:163
#define MATROSKA_ID_TRACKUID
Definition: matroska.h:79
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:147
uint64_t display_height
Definition: matroskadec.c:133
#define U(x)
Definition: vp56_arith.h:37
static EbmlSyntax matroska_info[]
Definition: matroskadec.c:338
#define MATROSKA_ID_ENCODINGORDER
Definition: matroska.h:135
#define MATROSKA_ID_VIDEOSTEREOMODE
Definition: matroska.h:122
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:84
#define AVINDEX_KEYFRAME
Definition: avformat.h:756
#define FILENAME
Definition: matroska.h:292
static EbmlSyntax matroska_blockadditions[]
Definition: matroskadec.c:587
EbmlType type
Definition: matroskadec.c:83
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:175
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1435
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:200
int64_t end_offset
Definition: matroskadec.c:3118
#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:1776
int profile
Definition: mxfenc.c:1619
static const uint16_t mask[17]
Definition: lzw.c:38
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2621
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:758
#define AV_RB16
Definition: intreadwrite.h:53
AVChapter * chapter
Definition: matroskadec.c:207
#define AVERROR(e)
Definition: error.h:43
static EbmlSyntax matroska_index[]
Definition: matroskadec.c:518
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:750
#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:180
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:209
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num)
Definition: matroskadec.c:899
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:1204
uint64_t display_width
Definition: matroskadec.c:132
#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:2781
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:196
EbmlBin additional
Definition: matroskadec.c:318
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:194
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:419
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:172
static EbmlSyntax matroska_clusters[]
Definition: matroskadec.c:613
static EbmlSyntax matroska_chapter[]
Definition: matroskadec.c:489
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
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:890
uint64_t timecode
Definition: matroskadec.c:252
#define CONFIG_ZLIB
Definition: config.h:451
#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
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
static EbmlSyntax matroska_attachments[]
Definition: matroskadec.c:466
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1166
static EbmlSyntax matroska_cluster_incremental_parsing[]
Definition: matroskadec.c:622
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2044
Only parse headers, do not repack.
Definition: avformat.h:740
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:528
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:826
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1118
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:111
int nb_elem
Definition: matroskadec.c:95
#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:416
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:415
char * lang
Definition: matroskadec.c:223
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:774
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:628
static EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:498
#define MATROSKA_ID_ENCODINGSIGHASHALGO
Definition: matroska.h:147
uint64_t skip_to_timecode
Definition: matroskadec.c:295
Definition: dct-test.c:51
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:2077
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1523
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:117
int bit_rate
the average bitrate
Definition: avcodec.h:1303
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1457
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:105
uint64_t start
Definition: matroskadec.c:202
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
char filename[1024]
input or output filename
Definition: avformat.h:1302
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:134
#define AV_BASE64_SIZE(x)
Calculate the output size needed to base64-encode x bytes to a null-terminated string.
Definition: base64.h:61
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:247
#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:287
#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:1026
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:712
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1412
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:227
uint64_t id_length
Definition: matroskadec.c:108
static EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:401
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num)
Definition: matroskadec.c:1193
#define CLUSTER_KEYFRAME
Definition: matroska.h:295
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:167
uint64_t doctype_version
Definition: matroskadec.c:110
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
static EbmlSyntax matroska_track_encoding[]
Definition: matroskadec.c:392
#define MATROSKA_ID_TRACKMAXCACHE
Definition: matroska.h:103
#define DURATION
Definition: matroska.h:294
int data_offset
Definition: matroskadec.c:85
#define MATROSKA_ID_CHAPTERPHYSEQUIV
Definition: matroska.h:228
static int matroska_read_close(AVFormatContext *s)
Definition: matroskadec.c:3097
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
EbmlBin codec_priv
Definition: matroskadec.c:173
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
Definition: matroskadec.c:832
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1207
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:215
#define AV_RL32
Definition: intreadwrite.h:146
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
Definition: lzo.c:134
int n
Definition: avisynth_c.h:589
AVDictionary * metadata
Definition: avformat.h:881
Opaque data information usually sparse.
Definition: avutil.h:198
#define MATROSKA_ID_VIDEOCOLORSPACE
Definition: matroska.h:125
static EbmlSyntax matroska_segment[]
Definition: matroskadec.c:564
#define MATROSKA_ID_CHAPTERS
Definition: matroska.h:63
static int matroska_probe(AVProbeData *p)
Definition: matroskadec.c:1151
#define EBML_ID_VOID
Definition: matroska.h:45
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1343
uint64_t max_block_additional_id
Definition: matroskadec.c:189
#define MATROSKA_ID_AUDIOSAMPLINGFREQ
Definition: matroska.h:128
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:784
double f
Definition: matroskadec.c:88
#define MATROSKA_ID_TRACKMINCACHE
Definition: matroska.h:102
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
Definition: matroskadec.c:1563
static int matroska_parse_flac(AVFormatContext *s, MatroskaTrack *track, int *offset)
Definition: matroskadec.c:1574
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:629
static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: matroskadec.c:3017
static EbmlSyntax matroska_seekhead[]
Definition: matroskadec.c:559
Stream structure.
Definition: avformat.h:807
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:2457
#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:2003
EbmlList encodings
Definition: matroskadec.c:183
#define CUES_END
Definition: matroska.h:291
char * codec_id
Definition: matroskadec.c:172
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:762
int64_t current_cluster_pos
Definition: matroskadec.c:305
#define MATROSKA_ID_VIDEOPIXELCROPB
Definition: matroska.h:116
#define AV_LOG_INFO
Standard information.
Definition: log.h:186
static int matroska_parse_tracks(AVFormatContext *s)
Definition: matroskadec.c:1629
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:790
AVS_Value src
Definition: avisynth_c.h:524
#define MATROSKA_ID_TRACKFLAGFORCED
Definition: matroska.h:100
#define MATROSKA_ID_TAGS
Definition: matroska.h:59
enum AVMediaType codec_type
Definition: avcodec.h:1247
static EbmlSyntax matroska_track_plane[]
Definition: matroskadec.c:406
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom.c:263
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
Definition: matroskadec.c:877
enum AVCodecID codec_id
Definition: avcodec.h:1256
#define MATROSKA_ID_TAGDEFAULT
Definition: matroska.h:171
#define BANDWIDTH
Definition: matroska.h:293
#define MATROSKA_ID_SEEKID
Definition: matroska.h:184
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:265
int sample_rate
samples per second
Definition: avcodec.h:1983
AVIOContext * pb
I/O context.
Definition: avformat.h:1268
#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
#define CUE_TIMESTAMPS
Definition: matroska.h:296
#define MATROSKA_ID_TAGLANG
Definition: matroska.h:170
static EbmlSyntax matroska_tags[]
Definition: matroskadec.c:548
uint64_t pixel_width
Definition: matroskadec.c:134
#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:1271
int64_t start_offset
Definition: matroskadec.c:3117
#define MATROSKA_ID_TRACKFLAGENABLED
Definition: matroska.h:98
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2859
#define MATROSKA_ID_TRACKS
Definition: matroska.h:57
void * buf
Definition: avisynth_c.h:595
#define MATROSKA_ID_TRACKPLANE
Definition: matroska.h:85
Data found in BlockAdditional element of matroska container.
Definition: avcodec.h:1088
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1354
#define MATROSKA_ID_TRACKNAME
Definition: matroska.h:96
uint64_t start
Definition: matroskadec.c:247
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
static EbmlSyntax matroska_cluster_incremental[]
Definition: matroskadec.c:636
int nb_index_entries
Definition: avformat.h:1013
#define MATROSKA_ID_SEEKENTRY
Definition: matroska.h:181
EbmlList pos
Definition: matroskadec.c:217
uint64_t u
Definition: matroskadec.c:87
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
#define MATROSKA_ID_EDITIONENTRY
Definition: matroska.h:214
int index
Definition: gxfenc.c:89
#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:186
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, int *buf_size, int type, uint32_t **lace_buf, int *laces)
Definition: matroskadec.c:2271
#define MATROSKA_ID_CUETIME
Definition: matroska.h:155
#define MATROSKA_ID_ENCODINGSIGALGO
Definition: matroska.h:146
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3002
static EbmlSyntax matroska_blockgroup[]
Definition: matroskadec.c:592
static EbmlSyntax matroska_track_encoding_encryption[]
Definition: matroskadec.c:382
Recommmends skipping the specified number of samples.
Definition: avcodec.h:1053
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:946
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:423
AVFormatContext * ctx
Definition: matroskadec.c:263
#define MATROSKA_ID_TRACKVIDEO
Definition: matroska.h:81
static EbmlSyntax matroska_track_combine_planes[]
Definition: matroskadec.c:412
int64_t discard_padding
Definition: matroskadec.c:319
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int size, int big_endian)
Definition: riffdec.c:84
int size
Definition: matroskadec.c:100
int error
contains the error code or 0 if no error happened
Definition: avio.h:102
This structure contains the data a format has to probe a file.
Definition: avformat.h:413
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, uint32_t id, void *data)
Definition: matroskadec.c:929
int list_elem_size
Definition: matroskadec.c:84
static EbmlSyntax ebml_syntax[]
Definition: matroskadec.c:333
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
#define MATROSKA_ID_VIDEOFRAMERATE
Definition: matroska.h:111
int64_t end_time_ns
Definition: matroskadec.c:3116
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:139
#define MATROSKA_ID_ATTACHMENTS
Definition: matroska.h:61
#define MATROSKA_ID_TRACKOPERATION
Definition: matroska.h:83
int64_t pos
Definition: matroskadec.c:102
#define MATROSKA_ID_CHAPTERDISPLAY
Definition: matroska.h:218
static int flags
Definition: cpu.c:47
MatroskaLevel1Element level1_elems[64]
Definition: matroskadec.c:301
uint8_t level
Definition: svq3.c:150
#define MATROSKA_ID_FILENAME
Definition: matroska.h:208
#define MATROSKA_ID_BLOCKADDITIONAL
Definition: matroska.h:195
const int avpriv_mpeg4audio_sample_rates[16]
Definition: mpeg4audio.c:57
const AVMetadataConv ff_mkv_metadata_conv[]
Definition: matroska.c:121
#define CONFIG_LZO
Definition: config.h:489
#define MATROSKA_ID_CODECID
Definition: matroska.h:88
static EbmlSyntax matroska_clusters_incremental[]
Definition: matroskadec.c:645
#define MATROSKA_ID_VIDEOALPHAMODE
Definition: matroska.h:123
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:425
full parsing and repack
Definition: avformat.h:739
int64_t reference
Definition: matroskadec.c:314
void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
Perform 4-bit block reordering for SIPR data.
Definition: rmsipr.c:41
Main libavformat public API header.
uint64_t buf_timecode
Definition: matroskadec.c:154
#define MATROSKA_ID_ENCODINGENCAESSETTINGS
Definition: matroska.h:143
uint64_t num
Definition: matroskadec.c:168
#define MATROSKA_ID_CUETRACK
Definition: matroska.h:159
static EbmlSyntax matroska_track_encoding_compression[]
Definition: matroskadec.c:376
EbmlType
Definition: matroskadec.c:66
#define MATROSKA_ID_SEEKPOSITION
Definition: matroska.h:185
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
Definition: matroskadec.c:656
#define MATROSKA_ID_CODECDELAY
Definition: matroska.h:94
#define MATROSKA_ID_CHAPTERTIMESTART
Definition: matroska.h:216
double time_scale
Definition: matroskadec.c:175
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:72
void * av_realloc(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:143
char * string
Definition: matroskadec.c:222
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:139
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1462
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:870
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
char * doctype
Definition: matroskadec.c:109
static EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:553
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:206
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:49
int den
denominator
Definition: rational.h:45
#define MATROSKA_ID_ENCODINGSIGNATURE
Definition: matroska.h:149
#define MATROSKA_ID_SEGMENT
Definition: matroska.h:53
uint32_t id
Definition: matroskadec.c:82
unsigned bps
Definition: movenc.c:1333
static EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:533
MatroskaTagTarget target
Definition: matroskadec.c:237
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:1099
#define MKBETAG(a, b, c, d)
Definition: common.h:320
#define MATROSKA_ID_SEEKHEAD
Definition: matroska.h:60
ASS as defined in Matroska.
Definition: avcodec.h:525
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:2537
#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:1051
#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
#define MATROSKA_ID_POINTENTRY
Definition: matroska.h:152
int len
int channels
number of audio channels
Definition: avcodec.h:1984
#define MATROSKA_ID_FILEUID
Definition: matroska.h:211
union EbmlSyntax::@153 def
#define MATROSKA_ID_VIDEOPIXELCROPL
Definition: matroska.h:118
void * priv_data
Format private data.
Definition: avformat.h:1254
uint64_t non_simple
Definition: matroskadec.c:315
#define MATROSKA_ID_CHAPTERUID
Definition: matroska.h:225
static EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c:512
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
Definition: matroskadec.c:855
#define MATROSKA_ID_VIDEODISPLAYUNIT
Definition: matroska.h:120
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
Definition: matroskadec.c:771
#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:1159
#define EBML_ID_EBMLMAXSIZELENGTH
Definition: matroska.h:39
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1321
MatroskaTrackEncryption encryption
Definition: matroskadec.c:127
#define MATROSKA_ID_CHAPSTRING
Definition: matroska.h:219
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:595
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:593
#define MATROSKA_ID_TAGSTRING
Definition: matroska.h:169
const CodecMime ff_mkv_image_mime_tags[]
Definition: matroska.c:102
#define av_malloc_array(a, b)
static EbmlSyntax matroska_index_pos[]
Definition: matroskadec.c:503
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:300
static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps, double min_buffer, double *buffer, double *sec_to_download, AVFormatContext *s, int64_t cues_start)
Definition: matroskadec.c:3193
static int ebml_read_float(AVIOContext *pb, int size, double *num)
Definition: matroskadec.c:814
#define MATROSKA_ID_DURATION
Definition: matroska.h:67
uint64_t length
Definition: matroskadec.c:248
static int matroska_aac_profile(char *codec_id)
Definition: matroskadec.c:1542
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:300
int stream_index
Definition: avcodec.h:1162
#define EBML_ID_DOCTYPEVERSION
Definition: matroska.h:41
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2257
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:849
static EbmlSyntax matroska_chapter_entry[]
Definition: matroskadec.c:477
#define CUES_START
Definition: matroska.h:290
uint8_t bitdepth
Definition: dirac.c:85
#define CONFIG_BZLIB
Definition: config.h:376
#define MKTAG(a, b, c, d)
Definition: common.h:319
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:872
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1027
#define MATROSKA_ID_ATTACHEDFILE
Definition: matroska.h:206
EbmlList blocks
Definition: matroskadec.c:253
This structure stores compressed data.
Definition: avcodec.h:1137
static EbmlSyntax matroska_chapter_display[]
Definition: matroskadec.c:471
#define MATROSKA_ID_CODECSTATE
Definition: matroska.h:202
uint64_t default_duration
Definition: matroskadec.c:176
int delay
Codec delay.
Definition: avcodec.h:1400
AVInputFormat ff_webm_dash_manifest_demuxer
Definition: matroskadec.c:3476
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:250
#define MATROSKA_ID_CODECINFOURL
Definition: matroska.h:91
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1153
#define MATROSKA_ID_VIDEOPIXELWIDTH
Definition: matroska.h:114
static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1491
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:899
#define MATROSKA_ID_TRACKAUDIO
Definition: matroska.h:82
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:241
GLuint buffer
Definition: opengl_enc.c:102
#define av_unused
Definition: attributes.h:118
#define MATROSKA_ID_ENCODINGSCOPE
Definition: matroska.h:136
const CodecTags ff_mkv_codec_tags[]
Definition: matroska.c:29
#define MATROSKA_ID_ENCODINGENCKEYID
Definition: matroska.h:145
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
#define MATROSKA_ID_DISCARDPADDING
Definition: matroska.h:203
const char * name
Definition: opengl_enc.c:103
static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
Definition: matroskadec.c:3274
static const char *const matroska_doctypes[]
Definition: matroskadec.c:654
static EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:349
uint64_t attachuid
Definition: matroskadec.c:233