Libav
matroskadec.c
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1 /*
2  * Matroska file demuxer
3  * Copyright (c) 2003-2008 The Libav Project
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
31 #include "config.h"
32 
33 #include <inttypes.h>
34 #include <stdio.h>
35 #if CONFIG_BZLIB
36 #include <bzlib.h>
37 #endif
38 #if CONFIG_ZLIB
39 #include <zlib.h>
40 #endif
41 
42 #include "libavutil/avstring.h"
43 #include "libavutil/dict.h"
44 #include "libavutil/intfloat.h"
45 #include "libavutil/intreadwrite.h"
46 #include "libavutil/lzo.h"
47 #include "libavutil/mathematics.h"
48 
49 #include "libavcodec/bytestream.h"
50 #include "libavcodec/flac.h"
51 #include "libavcodec/mpeg4audio.h"
52 
53 #include "avformat.h"
54 #include "avio_internal.h"
55 #include "internal.h"
56 #include "isom.h"
57 #include "matroska.h"
58 #include "oggdec.h"
59 /* For ff_codec_get_id(). */
60 #include "riff.h"
61 #include "rmsipr.h"
62 
63 typedef enum {
74 } EbmlType;
75 
76 typedef const struct EbmlSyntax {
77  uint32_t id;
81  union {
82  uint64_t u;
83  double f;
84  const char *s;
85  const struct EbmlSyntax *n;
86  } def;
87 } EbmlSyntax;
88 
89 typedef struct {
90  int nb_elem;
91  void *elem;
92 } EbmlList;
93 
94 typedef struct {
95  int size;
97  int64_t pos;
98 } EbmlBin;
99 
100 typedef struct {
101  uint64_t version;
102  uint64_t max_size;
103  uint64_t id_length;
104  char *doctype;
105  uint64_t doctype_version;
106 } Ebml;
107 
108 typedef struct {
109  uint64_t algo;
112 
113 typedef struct {
114  uint64_t scope;
115  uint64_t type;
118 
119 typedef struct {
120  double frame_rate;
121  uint64_t display_width;
122  uint64_t display_height;
123  uint64_t pixel_width;
124  uint64_t pixel_height;
125  uint64_t fourcc;
127 
128 typedef struct {
129  double samplerate;
131  uint64_t bitdepth;
132  uint64_t channels;
133 
134  /* real audio header (extracted from extradata) */
140  int pkt_cnt;
141  uint64_t buf_timecode;
144 
145 typedef struct {
146  uint64_t num;
147  uint64_t uid;
148  uint64_t type;
149  char *name;
150  char *codec_id;
152  char *language;
153  double time_scale;
155  uint64_t flag_default;
156  uint64_t flag_forced;
160  uint64_t codec_delay;
161 
163  int64_t end_timecode;
165 } MatroskaTrack;
166 
167 typedef struct {
168  uint64_t uid;
169  char *filename;
170  char *mime;
172 
175 
176 typedef struct {
177  uint64_t start;
178  uint64_t end;
179  uint64_t uid;
180  char *title;
181 
184 
185 typedef struct {
186  uint64_t track;
187  uint64_t pos;
189 
190 typedef struct {
191  uint64_t time;
193 } MatroskaIndex;
194 
195 typedef struct {
196  char *name;
197  char *string;
198  char *lang;
199  uint64_t def;
201 } MatroskaTag;
202 
203 typedef struct {
204  char *type;
205  uint64_t typevalue;
206  uint64_t trackuid;
207  uint64_t chapteruid;
208  uint64_t attachuid;
210 
211 typedef struct {
214 } MatroskaTags;
215 
216 typedef struct {
217  uint64_t id;
218  uint64_t pos;
220 
221 typedef struct {
222  uint64_t start;
223  uint64_t length;
224 } MatroskaLevel;
225 
226 typedef struct {
227  uint64_t timecode;
230 
231 typedef struct {
233 
234  /* EBML stuff */
237  int level_up;
238  uint32_t current_id;
239 
240  uint64_t time_scale;
241  double duration;
242  char *title;
249 
250  /* byte position of the segment inside the stream */
251  int64_t segment_start;
252 
253  /* the packet queue */
257 
258  int done;
259 
260  /* What to skip before effectively reading a packet. */
263 
264  /* File has a CUES element, but we defer parsing until it is needed. */
266 
270 
271  /* File has SSA subtitles which prevent incremental cluster parsing. */
274 
275 typedef struct {
276  uint64_t duration;
277  int64_t reference;
278  uint64_t non_simple;
280 } MatroskaBlock;
281 
283  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
284  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
285  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
286  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
287  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
290  { 0 }
291 };
292 
294  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
295  { 0 }
296 };
297 
299  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
301  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
306  { 0 }
307 };
308 
310  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
311  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width) },
312  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height) },
313  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
314  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
315  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, fourcc) },
324  { 0 }
325 };
326 
328  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
329  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
331  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
332  { 0 }
333 };
334 
338  { 0 }
339 };
340 
342  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
343  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
344  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
346  { 0 }
347 };
348 
350  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
351  { 0 }
352 };
353 
355  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
357  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
358  { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
360  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
361  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
362  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
363  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
364  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
365  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
366  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
367  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
368  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
369  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
379  { 0 }
380 };
381 
383  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
384  { 0 }
385 };
386 
388  { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
389  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
390  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
391  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
393  { 0 }
394 };
395 
397  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
398  { 0 }
399 };
400 
402  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
404  { 0 }
405 };
406 
408  { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
409  { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
410  { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
411  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
416  { 0 }
417 };
418 
420  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
425  { 0 }
426 };
427 
429  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
430  { 0 }
431 };
432 
434  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
437  { 0 }
438 };
439 
441  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
442  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
443  { 0 }
444 };
445 
447  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
448  { 0 }
449 };
450 
452  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
453  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
454  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
455  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
456  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
457  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
458  { 0 }
459 };
460 
462  { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
463  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
464  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
465  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
466  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
467  { 0 }
468 };
469 
471  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
472  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
473  { 0 }
474 };
475 
477  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
478  { 0 }
479 };
480 
482  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
483  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
484  { 0 }
485 };
486 
488  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
489  { 0 }
490 };
491 
493  { MATROSKA_ID_INFO, EBML_NEST, 0, 0, { .n = matroska_info } },
494  { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, { .n = matroska_tracks } },
495  { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, { .n = matroska_attachments } },
496  { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, { .n = matroska_chapters } },
497  { MATROSKA_ID_CUES, EBML_NEST, 0, 0, { .n = matroska_index } },
498  { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, { .n = matroska_tags } },
499  { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, { .n = matroska_seekhead } },
501  { 0 }
502 };
503 
505  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
506  { 0 }
507 };
508 
510  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
511  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
513  { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock, reference) },
515  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
516  { 0 }
517 };
518 
520  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
521  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
522  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
525  { 0 }
526 };
527 
529  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
534  { 0 }
535 };
536 
538  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
539  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
540  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
548  { 0 }
549 };
550 
552  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
557  { 0 }
558 };
559 
561  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
566  { 0 }
567 };
568 
569 static const char *const matroska_doctypes[] = { "matroska", "webm" };
570 
571 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
572 {
573  AVIOContext *pb = matroska->ctx->pb;
574  uint32_t id;
575  matroska->current_id = 0;
576  matroska->num_levels = 0;
577 
578  /* seek to next position to resync from */
579  if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
580  goto eof;
581 
582  id = avio_rb32(pb);
583 
584  // try to find a toplevel element
585  while (!pb->eof_reached) {
586  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
587  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
589  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
590  matroska->current_id = id;
591  return 0;
592  }
593  id = (id << 8) | avio_r8(pb);
594  }
595 
596 eof:
597  matroska->done = 1;
598  return AVERROR_EOF;
599 }
600 
601 /*
602  * Return: Whether we reached the end of a level in the hierarchy or not.
603  */
605 {
606  AVIOContext *pb = matroska->ctx->pb;
607  int64_t pos = avio_tell(pb);
608 
609  if (matroska->num_levels > 0) {
610  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
611  if (pos - level->start >= level->length || matroska->current_id) {
612  matroska->num_levels--;
613  return 1;
614  }
615  }
616  return 0;
617 }
618 
619 /*
620  * Read: an "EBML number", which is defined as a variable-length
621  * array of bytes. The first byte indicates the length by giving a
622  * number of 0-bits followed by a one. The position of the first
623  * "one" bit inside the first byte indicates the length of this
624  * number.
625  * Returns: number of bytes read, < 0 on error
626  */
628  int max_size, uint64_t *number)
629 {
630  int read = 1, n = 1;
631  uint64_t total = 0;
632 
633  /* The first byte tells us the length in bytes - avio_r8() can normally
634  * return 0, but since that's not a valid first ebmlID byte, we can
635  * use it safely here to catch EOS. */
636  if (!(total = avio_r8(pb))) {
637  /* we might encounter EOS here */
638  if (!pb->eof_reached) {
639  int64_t pos = avio_tell(pb);
640  av_log(matroska->ctx, AV_LOG_ERROR,
641  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
642  pos, pos);
643  return pb->error ? pb->error : AVERROR(EIO);
644  }
645  return AVERROR_EOF;
646  }
647 
648  /* get the length of the EBML number */
649  read = 8 - ff_log2_tab[total];
650  if (read > max_size) {
651  int64_t pos = avio_tell(pb) - 1;
652  av_log(matroska->ctx, AV_LOG_ERROR,
653  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
654  (uint8_t) total, pos, pos);
655  return AVERROR_INVALIDDATA;
656  }
657 
658  /* read out length */
659  total ^= 1 << ff_log2_tab[total];
660  while (n++ < read)
661  total = (total << 8) | avio_r8(pb);
662 
663  *number = total;
664 
665  return read;
666 }
667 
674  uint64_t *number)
675 {
676  int res = ebml_read_num(matroska, pb, 8, number);
677  if (res > 0 && *number + 1 == 1ULL << (7 * res))
678  *number = 0xffffffffffffffULL;
679  return res;
680 }
681 
682 /*
683  * Read the next element as an unsigned int.
684  * 0 is success, < 0 is failure.
685  */
686 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
687 {
688  int n = 0;
689 
690  if (size > 8)
691  return AVERROR_INVALIDDATA;
692 
693  /* big-endian ordering; build up number */
694  *num = 0;
695  while (n++ < size)
696  *num = (*num << 8) | avio_r8(pb);
697 
698  return 0;
699 }
700 
701 /*
702  * Read the next element as a float.
703  * 0 is success, < 0 is failure.
704  */
705 static int ebml_read_float(AVIOContext *pb, int size, double *num)
706 {
707  if (size == 0)
708  *num = 0;
709  else if (size == 4)
710  *num = av_int2float(avio_rb32(pb));
711  else if (size == 8)
712  *num = av_int2double(avio_rb64(pb));
713  else
714  return AVERROR_INVALIDDATA;
715 
716  return 0;
717 }
718 
719 /*
720  * Read the next element as an ASCII string.
721  * 0 is success, < 0 is failure.
722  */
723 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
724 {
725  char *res;
726 
727  /* EBML strings are usually not 0-terminated, so we allocate one
728  * byte more, read the string and NULL-terminate it ourselves. */
729  if (!(res = av_malloc(size + 1)))
730  return AVERROR(ENOMEM);
731  if (avio_read(pb, (uint8_t *) res, size) != size) {
732  av_free(res);
733  return AVERROR(EIO);
734  }
735  (res)[size] = '\0';
736  av_free(*str);
737  *str = res;
738 
739  return 0;
740 }
741 
742 /*
743  * Read the next element as binary data.
744  * 0 is success, < 0 is failure.
745  */
746 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
747 {
748  av_free(bin->data);
749  if (!(bin->data = av_mallocz(length + FF_INPUT_BUFFER_PADDING_SIZE)))
750  return AVERROR(ENOMEM);
751 
752  bin->size = length;
753  bin->pos = avio_tell(pb);
754  if (avio_read(pb, bin->data, length) != length) {
755  av_freep(&bin->data);
756  return AVERROR(EIO);
757  }
758 
759  return 0;
760 }
761 
762 /*
763  * Read the next element, but only the header. The contents
764  * are supposed to be sub-elements which can be read separately.
765  * 0 is success, < 0 is failure.
766  */
767 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
768 {
769  AVIOContext *pb = matroska->ctx->pb;
771 
772  if (matroska->num_levels >= EBML_MAX_DEPTH) {
773  av_log(matroska->ctx, AV_LOG_ERROR,
774  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
775  return AVERROR(ENOSYS);
776  }
777 
778  level = &matroska->levels[matroska->num_levels++];
779  level->start = avio_tell(pb);
780  level->length = length;
781 
782  return 0;
783 }
784 
785 /*
786  * Read signed/unsigned "EBML" numbers.
787  * Return: number of bytes processed, < 0 on error
788  */
790  uint8_t *data, uint32_t size, uint64_t *num)
791 {
792  AVIOContext pb;
793  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
794  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
795 }
796 
797 /*
798  * Same as above, but signed.
799  */
801  uint8_t *data, uint32_t size, int64_t *num)
802 {
803  uint64_t unum;
804  int res;
805 
806  /* read as unsigned number first */
807  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
808  return res;
809 
810  /* make signed (weird way) */
811  *num = unum - ((1LL << (7 * res - 1)) - 1);
812 
813  return res;
814 }
815 
816 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
817  EbmlSyntax *syntax, void *data);
818 
819 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
820  uint32_t id, void *data)
821 {
822  int i;
823  for (i = 0; syntax[i].id; i++)
824  if (id == syntax[i].id)
825  break;
826  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
827  matroska->num_levels > 0 &&
828  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
829  return 0; // we reached the end of an unknown size cluster
830  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
831  av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%"PRIX32"\n", id);
832  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
833  return AVERROR_INVALIDDATA;
834  }
835  return ebml_parse_elem(matroska, &syntax[i], data);
836 }
837 
838 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
839  void *data)
840 {
841  if (!matroska->current_id) {
842  uint64_t id;
843  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
844  if (res < 0)
845  return res;
846  matroska->current_id = id | 1 << 7 * res;
847  }
848  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
849 }
850 
851 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
852  void *data)
853 {
854  int i, res = 0;
855 
856  for (i = 0; syntax[i].id; i++)
857  switch (syntax[i].type) {
858  case EBML_UINT:
859  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
860  break;
861  case EBML_FLOAT:
862  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
863  break;
864  case EBML_STR:
865  case EBML_UTF8:
866  // the default may be NULL
867  if (syntax[i].def.s) {
868  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
869  *dst = av_strdup(syntax[i].def.s);
870  if (!*dst)
871  return AVERROR(ENOMEM);
872  }
873  break;
874  }
875 
876  while (!res && !ebml_level_end(matroska))
877  res = ebml_parse(matroska, syntax, data);
878 
879  return res;
880 }
881 
883  EbmlSyntax *syntax, void *data)
884 {
885  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
886  [EBML_UINT] = 8,
887  [EBML_FLOAT] = 8,
888  // max. 16 MB for strings
889  [EBML_STR] = 0x1000000,
890  [EBML_UTF8] = 0x1000000,
891  // max. 256 MB for binary data
892  [EBML_BIN] = 0x10000000,
893  // no limits for anything else
894  };
895  AVIOContext *pb = matroska->ctx->pb;
896  uint32_t id = syntax->id;
897  uint64_t length;
898  int res;
899 
900  data = (char *) data + syntax->data_offset;
901  if (syntax->list_elem_size) {
902  EbmlList *list = data;
903  if ((res = av_reallocp_array(&list->elem,
904  list->nb_elem + 1,
905  syntax->list_elem_size)) < 0) {
906  list->nb_elem = 0;
907  return res;
908  }
909  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
910  memset(data, 0, syntax->list_elem_size);
911  list->nb_elem++;
912  }
913 
914  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
915  matroska->current_id = 0;
916  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
917  return res;
918  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
919  av_log(matroska->ctx, AV_LOG_ERROR,
920  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
921  length, max_lengths[syntax->type], syntax->type);
922  return AVERROR_INVALIDDATA;
923  }
924  }
925 
926  switch (syntax->type) {
927  case EBML_UINT:
928  res = ebml_read_uint(pb, length, data);
929  break;
930  case EBML_FLOAT:
931  res = ebml_read_float(pb, length, data);
932  break;
933  case EBML_STR:
934  case EBML_UTF8:
935  res = ebml_read_ascii(pb, length, data);
936  break;
937  case EBML_BIN:
938  res = ebml_read_binary(pb, length, data);
939  break;
940  case EBML_NEST:
941  if ((res = ebml_read_master(matroska, length)) < 0)
942  return res;
943  if (id == MATROSKA_ID_SEGMENT)
944  matroska->segment_start = avio_tell(matroska->ctx->pb);
945  return ebml_parse_nest(matroska, syntax->def.n, data);
946  case EBML_PASS:
947  return ebml_parse_id(matroska, syntax->def.n, id, data);
948  case EBML_STOP:
949  return 1;
950  default:
951  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
952  }
953  if (res == AVERROR_INVALIDDATA)
954  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
955  else if (res == AVERROR(EIO))
956  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
957  return res;
958 }
959 
960 static void ebml_free(EbmlSyntax *syntax, void *data)
961 {
962  int i, j;
963  for (i = 0; syntax[i].id; i++) {
964  void *data_off = (char *) data + syntax[i].data_offset;
965  switch (syntax[i].type) {
966  case EBML_STR:
967  case EBML_UTF8:
968  av_freep(data_off);
969  break;
970  case EBML_BIN:
971  av_freep(&((EbmlBin *) data_off)->data);
972  break;
973  case EBML_NEST:
974  if (syntax[i].list_elem_size) {
975  EbmlList *list = data_off;
976  char *ptr = list->elem;
977  for (j = 0; j < list->nb_elem;
978  j++, ptr += syntax[i].list_elem_size)
979  ebml_free(syntax[i].def.n, ptr);
980  av_free(list->elem);
981  } else
982  ebml_free(syntax[i].def.n, data_off);
983  default:
984  break;
985  }
986  }
987 }
988 
989 /*
990  * Autodetecting...
991  */
993 {
994  uint64_t total = 0;
995  int len_mask = 0x80, size = 1, n = 1, i;
996 
997  /* EBML header? */
998  if (AV_RB32(p->buf) != EBML_ID_HEADER)
999  return 0;
1000 
1001  /* length of header */
1002  total = p->buf[4];
1003  while (size <= 8 && !(total & len_mask)) {
1004  size++;
1005  len_mask >>= 1;
1006  }
1007  if (size > 8)
1008  return 0;
1009  total &= (len_mask - 1);
1010  while (n < size)
1011  total = (total << 8) | p->buf[4 + n++];
1012 
1013  /* Does the probe data contain the whole header? */
1014  if (p->buf_size < 4 + size + total)
1015  return 0;
1016 
1017  /* The header should contain a known document type. For now,
1018  * we don't parse the whole header but simply check for the
1019  * availability of that array of characters inside the header.
1020  * Not fully fool-proof, but good enough. */
1021  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1022  int probelen = strlen(matroska_doctypes[i]);
1023  if (total < probelen)
1024  continue;
1025  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1026  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1027  return AVPROBE_SCORE_MAX;
1028  }
1029 
1030  // probably valid EBML header but no recognized doctype
1031  return AVPROBE_SCORE_EXTENSION;
1032 }
1033 
1035  int num)
1036 {
1037  MatroskaTrack *tracks = matroska->tracks.elem;
1038  int i;
1039 
1040  for (i = 0; i < matroska->tracks.nb_elem; i++)
1041  if (tracks[i].num == num)
1042  return &tracks[i];
1043 
1044  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1045  return NULL;
1046 }
1047 
1048 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1049  MatroskaTrack *track)
1050 {
1051  MatroskaTrackEncoding *encodings = track->encodings.elem;
1052  uint8_t *data = *buf;
1053  int isize = *buf_size;
1054  uint8_t *pkt_data = NULL;
1055  uint8_t av_unused *newpktdata;
1056  int pkt_size = isize;
1057  int result = 0;
1058  int olen;
1059 
1060  if (pkt_size >= 10000000)
1061  return AVERROR_INVALIDDATA;
1062 
1063  switch (encodings[0].compression.algo) {
1065  {
1066  int header_size = encodings[0].compression.settings.size;
1067  uint8_t *header = encodings[0].compression.settings.data;
1068 
1069  if (!header_size)
1070  return 0;
1071 
1072  pkt_size = isize + header_size;
1073  pkt_data = av_malloc(pkt_size);
1074  if (!pkt_data)
1075  return AVERROR(ENOMEM);
1076 
1077  memcpy(pkt_data, header, header_size);
1078  memcpy(pkt_data + header_size, data, isize);
1079  break;
1080  }
1081 #if CONFIG_LZO
1083  do {
1084  olen = pkt_size *= 3;
1085  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1086  if (!newpktdata) {
1087  result = AVERROR(ENOMEM);
1088  goto failed;
1089  }
1090  pkt_data = newpktdata;
1091  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1092  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1093  if (result) {
1094  result = AVERROR_INVALIDDATA;
1095  goto failed;
1096  }
1097  pkt_size -= olen;
1098  break;
1099 #endif
1100 #if CONFIG_ZLIB
1102  {
1103  z_stream zstream = { 0 };
1104  if (inflateInit(&zstream) != Z_OK)
1105  return -1;
1106  zstream.next_in = data;
1107  zstream.avail_in = isize;
1108  do {
1109  pkt_size *= 3;
1110  newpktdata = av_realloc(pkt_data, pkt_size);
1111  if (!newpktdata) {
1112  inflateEnd(&zstream);
1113  goto failed;
1114  }
1115  pkt_data = newpktdata;
1116  zstream.avail_out = pkt_size - zstream.total_out;
1117  zstream.next_out = pkt_data + zstream.total_out;
1118  result = inflate(&zstream, Z_NO_FLUSH);
1119  } while (result == Z_OK && pkt_size < 10000000);
1120  pkt_size = zstream.total_out;
1121  inflateEnd(&zstream);
1122  if (result != Z_STREAM_END) {
1123  if (result == Z_MEM_ERROR)
1124  result = AVERROR(ENOMEM);
1125  else
1126  result = AVERROR_INVALIDDATA;
1127  goto failed;
1128  }
1129  break;
1130  }
1131 #endif
1132 #if CONFIG_BZLIB
1134  {
1135  bz_stream bzstream = { 0 };
1136  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1137  return -1;
1138  bzstream.next_in = data;
1139  bzstream.avail_in = isize;
1140  do {
1141  pkt_size *= 3;
1142  newpktdata = av_realloc(pkt_data, pkt_size);
1143  if (!newpktdata) {
1144  BZ2_bzDecompressEnd(&bzstream);
1145  goto failed;
1146  }
1147  pkt_data = newpktdata;
1148  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1149  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1150  result = BZ2_bzDecompress(&bzstream);
1151  } while (result == BZ_OK && pkt_size < 10000000);
1152  pkt_size = bzstream.total_out_lo32;
1153  BZ2_bzDecompressEnd(&bzstream);
1154  if (result != BZ_STREAM_END) {
1155  if (result == BZ_MEM_ERROR)
1156  result = AVERROR(ENOMEM);
1157  else
1158  result = AVERROR_INVALIDDATA;
1159  goto failed;
1160  }
1161  break;
1162  }
1163 #endif
1164  default:
1165  return AVERROR_INVALIDDATA;
1166  }
1167 
1168  *buf = pkt_data;
1169  *buf_size = pkt_size;
1170  return 0;
1171 
1172 failed:
1173  av_free(pkt_data);
1174  return result;
1175 }
1176 
1178  AVPacket *pkt, uint64_t display_duration)
1179 {
1180  AVBufferRef *line;
1181  char *layer, *ptr = pkt->data, *end = ptr + pkt->size;
1182 
1183  for (; *ptr != ',' && ptr < end - 1; ptr++)
1184  ;
1185  if (*ptr == ',')
1186  layer = ++ptr;
1187  for (; *ptr != ',' && ptr < end - 1; ptr++)
1188  ;
1189  if (*ptr == ',') {
1190  int64_t end_pts = pkt->pts + display_duration;
1191  int sc = matroska->time_scale * pkt->pts / 10000000;
1192  int ec = matroska->time_scale * end_pts / 10000000;
1193  int sh, sm, ss, eh, em, es, len;
1194  sh = sc / 360000;
1195  sc -= 360000 * sh;
1196  sm = sc / 6000;
1197  sc -= 6000 * sm;
1198  ss = sc / 100;
1199  sc -= 100 * ss;
1200  eh = ec / 360000;
1201  ec -= 360000 * eh;
1202  em = ec / 6000;
1203  ec -= 6000 * em;
1204  es = ec / 100;
1205  ec -= 100 * es;
1206  *ptr++ = '\0';
1207  len = 50 + end - ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1208  if (!(line = av_buffer_alloc(len)))
1209  return;
1210  snprintf(line->data, len,
1211  "Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1212  layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1213  av_buffer_unref(&pkt->buf);
1214  pkt->buf = line;
1215  pkt->data = line->data;
1216  pkt->size = strlen(line->data);
1217  }
1218 }
1219 
1221 {
1222  int old_size = out->size;
1223  int ret = av_grow_packet(out, in->size);
1224  if (ret < 0)
1225  return ret;
1226 
1227  memcpy(out->data + old_size, in->data, in->size);
1228 
1229  av_free_packet(in);
1230  av_free(in);
1231  return 0;
1232 }
1233 
1235  AVDictionary **metadata, char *prefix)
1236 {
1237  MatroskaTag *tags = list->elem;
1238  char key[1024];
1239  int i;
1240 
1241  for (i = 0; i < list->nb_elem; i++) {
1242  const char *lang = tags[i].lang &&
1243  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1244 
1245  if (!tags[i].name) {
1246  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1247  continue;
1248  }
1249  if (prefix)
1250  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1251  else
1252  av_strlcpy(key, tags[i].name, sizeof(key));
1253  if (tags[i].def || !lang) {
1254  av_dict_set(metadata, key, tags[i].string, 0);
1255  if (tags[i].sub.nb_elem)
1256  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1257  }
1258  if (lang) {
1259  av_strlcat(key, "-", sizeof(key));
1260  av_strlcat(key, lang, sizeof(key));
1261  av_dict_set(metadata, key, tags[i].string, 0);
1262  if (tags[i].sub.nb_elem)
1263  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1264  }
1265  }
1267 }
1268 
1270 {
1271  MatroskaDemuxContext *matroska = s->priv_data;
1272  MatroskaTags *tags = matroska->tags.elem;
1273  int i, j;
1274 
1275  for (i = 0; i < matroska->tags.nb_elem; i++) {
1276  if (tags[i].target.attachuid) {
1277  MatroskaAttachment *attachment = matroska->attachments.elem;
1278  for (j = 0; j < matroska->attachments.nb_elem; j++)
1279  if (attachment[j].uid == tags[i].target.attachuid &&
1280  attachment[j].stream)
1281  matroska_convert_tag(s, &tags[i].tag,
1282  &attachment[j].stream->metadata, NULL);
1283  } else if (tags[i].target.chapteruid) {
1284  MatroskaChapter *chapter = matroska->chapters.elem;
1285  for (j = 0; j < matroska->chapters.nb_elem; j++)
1286  if (chapter[j].uid == tags[i].target.chapteruid &&
1287  chapter[j].chapter)
1288  matroska_convert_tag(s, &tags[i].tag,
1289  &chapter[j].chapter->metadata, NULL);
1290  } else if (tags[i].target.trackuid) {
1291  MatroskaTrack *track = matroska->tracks.elem;
1292  for (j = 0; j < matroska->tracks.nb_elem; j++)
1293  if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1294  matroska_convert_tag(s, &tags[i].tag,
1295  &track[j].stream->metadata, NULL);
1296  } else {
1297  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1298  tags[i].target.type);
1299  }
1300  }
1301 }
1302 
1304  int idx)
1305 {
1306  EbmlList *seekhead_list = &matroska->seekhead;
1307  uint32_t level_up = matroska->level_up;
1308  uint32_t saved_id = matroska->current_id;
1309  MatroskaSeekhead *seekhead = seekhead_list->elem;
1310  int64_t before_pos = avio_tell(matroska->ctx->pb);
1312  int64_t offset;
1313  int ret = 0;
1314 
1315  if (idx >= seekhead_list->nb_elem ||
1316  seekhead[idx].id == MATROSKA_ID_SEEKHEAD ||
1317  seekhead[idx].id == MATROSKA_ID_CLUSTER)
1318  return 0;
1319 
1320  /* seek */
1321  offset = seekhead[idx].pos + matroska->segment_start;
1322  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1323  /* We don't want to lose our seekhead level, so we add
1324  * a dummy. This is a crude hack. */
1325  if (matroska->num_levels == EBML_MAX_DEPTH) {
1326  av_log(matroska->ctx, AV_LOG_INFO,
1327  "Max EBML element depth (%d) reached, "
1328  "cannot parse further.\n", EBML_MAX_DEPTH);
1329  ret = AVERROR_INVALIDDATA;
1330  } else {
1331  level.start = 0;
1332  level.length = (uint64_t) -1;
1333  matroska->levels[matroska->num_levels] = level;
1334  matroska->num_levels++;
1335  matroska->current_id = 0;
1336 
1337  ret = ebml_parse(matroska, matroska_segment, matroska);
1338 
1339  /* remove dummy level */
1340  while (matroska->num_levels) {
1341  uint64_t length = matroska->levels[--matroska->num_levels].length;
1342  if (length == (uint64_t) -1)
1343  break;
1344  }
1345  }
1346  }
1347  /* seek back */
1348  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1349  matroska->level_up = level_up;
1350  matroska->current_id = saved_id;
1351 
1352  return ret;
1353 }
1354 
1356 {
1357  EbmlList *seekhead_list = &matroska->seekhead;
1358  int64_t before_pos = avio_tell(matroska->ctx->pb);
1359  int i;
1360 
1361  // we should not do any seeking in the streaming case
1362  if (!matroska->ctx->pb->seekable ||
1363  (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1364  return;
1365 
1366  for (i = 0; i < seekhead_list->nb_elem; i++) {
1367  MatroskaSeekhead *seekhead = seekhead_list->elem;
1368  if (seekhead[i].pos <= before_pos)
1369  continue;
1370 
1371  // defer cues parsing until we actually need cue data.
1372  if (seekhead[i].id == MATROSKA_ID_CUES) {
1373  matroska->cues_parsing_deferred = 1;
1374  continue;
1375  }
1376 
1377  if (matroska_parse_seekhead_entry(matroska, i) < 0)
1378  break;
1379  }
1380 }
1381 
1383 {
1384  EbmlList *seekhead_list = &matroska->seekhead;
1385  MatroskaSeekhead *seekhead = seekhead_list->elem;
1386  EbmlList *index_list;
1388  int index_scale = 1;
1389  int i, j;
1390 
1391  for (i = 0; i < seekhead_list->nb_elem; i++)
1392  if (seekhead[i].id == MATROSKA_ID_CUES)
1393  break;
1394  assert(i <= seekhead_list->nb_elem);
1395 
1396  matroska_parse_seekhead_entry(matroska, i);
1397 
1398  index_list = &matroska->index;
1399  index = index_list->elem;
1400  if (index_list->nb_elem &&
1401  index[0].time > 1E14 / matroska->time_scale) {
1402  av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1403  index_scale = matroska->time_scale;
1404  }
1405  for (i = 0; i < index_list->nb_elem; i++) {
1406  EbmlList *pos_list = &index[i].pos;
1407  MatroskaIndexPos *pos = pos_list->elem;
1408  for (j = 0; j < pos_list->nb_elem; j++) {
1409  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1410  pos[j].track);
1411  if (track && track->stream)
1412  av_add_index_entry(track->stream,
1413  pos[j].pos + matroska->segment_start,
1414  index[i].time / index_scale, 0, 0,
1416  }
1417  }
1418 }
1419 
1421 {
1422  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1423  int profile;
1424 
1425  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1426  if (strstr(codec_id, aac_profiles[profile]))
1427  break;
1428  return profile + 1;
1429 }
1430 
1431 static int matroska_aac_sri(int samplerate)
1432 {
1433  int sri;
1434 
1435  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1436  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1437  break;
1438  return sri;
1439 }
1440 
1442  MatroskaTrack *track,
1443  int *offset)
1444 {
1445  AVStream *st = track->stream;
1446  uint8_t *p = track->codec_priv.data;
1447  int size = track->codec_priv.size;
1448 
1449  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1450  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1451  track->codec_priv.size = 0;
1452  return 0;
1453  }
1454  *offset = 8;
1455  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1456 
1457  p += track->codec_priv.size;
1458  size -= track->codec_priv.size;
1459 
1460  /* parse the remaining metadata blocks if present */
1461  while (size >= 4) {
1462  int block_last, block_type, block_size;
1463 
1464  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1465 
1466  p += 4;
1467  size -= 4;
1468  if (block_size > size)
1469  return 0;
1470 
1471  /* check for the channel mask */
1472  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1473  AVDictionary *dict = NULL;
1474  AVDictionaryEntry *chmask;
1475 
1476  ff_vorbis_comment(s, &dict, p, block_size, 0);
1477  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1478  if (chmask) {
1479  uint64_t mask = strtol(chmask->value, NULL, 0);
1480  if (!mask || mask & ~0x3ffffULL) {
1482  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1483  } else
1484  st->codec->channel_layout = mask;
1485  }
1486  av_dict_free(&dict);
1487  }
1488 
1489  p += block_size;
1490  size -= block_size;
1491  }
1492 
1493  return 0;
1494 }
1495 
1497 {
1498  MatroskaDemuxContext *matroska = s->priv_data;
1499  MatroskaTrack *tracks = matroska->tracks.elem;
1500  AVStream *st;
1501  int i, j, ret;
1502 
1503  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1504  MatroskaTrack *track = &tracks[i];
1506  EbmlList *encodings_list = &track->encodings;
1507  MatroskaTrackEncoding *encodings = encodings_list->elem;
1508  uint8_t *extradata = NULL;
1509  int extradata_size = 0;
1510  int extradata_offset = 0;
1511  AVIOContext b;
1512 
1513  /* Apply some sanity checks. */
1514  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1515  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1516  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1517  av_log(matroska->ctx, AV_LOG_INFO,
1518  "Unknown or unsupported track type %"PRIu64"\n",
1519  track->type);
1520  continue;
1521  }
1522  if (!track->codec_id)
1523  continue;
1524 
1525  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1526  if (!track->default_duration && track->video.frame_rate > 0)
1527  track->default_duration = 1000000000 / track->video.frame_rate;
1528  if (!track->video.display_width)
1529  track->video.display_width = track->video.pixel_width;
1530  if (!track->video.display_height)
1531  track->video.display_height = track->video.pixel_height;
1532  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1533  if (!track->audio.out_samplerate)
1534  track->audio.out_samplerate = track->audio.samplerate;
1535  }
1536  if (encodings_list->nb_elem > 1) {
1537  av_log(matroska->ctx, AV_LOG_ERROR,
1538  "Multiple combined encodings not supported");
1539  } else if (encodings_list->nb_elem == 1) {
1540  if (encodings[0].type ||
1541  (
1542 #if CONFIG_ZLIB
1543  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1544 #endif
1545 #if CONFIG_BZLIB
1547 #endif
1548 #if CONFIG_LZO
1550 #endif
1552  encodings[0].scope = 0;
1553  av_log(matroska->ctx, AV_LOG_ERROR,
1554  "Unsupported encoding type");
1555  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1556  uint8_t *codec_priv = track->codec_priv.data;
1557  int ret = matroska_decode_buffer(&track->codec_priv.data,
1558  &track->codec_priv.size,
1559  track);
1560  if (ret < 0) {
1561  track->codec_priv.data = NULL;
1562  track->codec_priv.size = 0;
1563  av_log(matroska->ctx, AV_LOG_ERROR,
1564  "Failed to decode codec private data\n");
1565  }
1566 
1567  if (codec_priv != track->codec_priv.data)
1568  av_free(codec_priv);
1569  }
1570  }
1571 
1572  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1573  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1574  strlen(ff_mkv_codec_tags[j].str))) {
1575  codec_id = ff_mkv_codec_tags[j].id;
1576  break;
1577  }
1578  }
1579 
1580  st = track->stream = avformat_new_stream(s, NULL);
1581  if (!st)
1582  return AVERROR(ENOMEM);
1583 
1584  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1585  track->codec_priv.size >= 40 &&
1586  track->codec_priv.data) {
1587  track->ms_compat = 1;
1588  track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1590  track->video.fourcc);
1591  extradata_offset = 40;
1592  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1593  track->codec_priv.size >= 14 &&
1594  track->codec_priv.data) {
1595  int ret;
1596  ffio_init_context(&b, track->codec_priv.data,
1597  track->codec_priv.size,
1598  0, NULL, NULL, NULL, NULL);
1599  ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1600  if (ret < 0)
1601  return ret;
1602  codec_id = st->codec->codec_id;
1603  extradata_offset = FFMIN(track->codec_priv.size, 18);
1604  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1605  (track->codec_priv.size >= 86) &&
1606  (track->codec_priv.data)) {
1607  track->video.fourcc = AV_RL32(track->codec_priv.data);
1609  track->video.fourcc);
1610  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1611  switch (track->audio.bitdepth) {
1612  case 8:
1613  codec_id = AV_CODEC_ID_PCM_U8;
1614  break;
1615  case 24:
1616  codec_id = AV_CODEC_ID_PCM_S24BE;
1617  break;
1618  case 32:
1619  codec_id = AV_CODEC_ID_PCM_S32BE;
1620  break;
1621  }
1622  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1623  switch (track->audio.bitdepth) {
1624  case 8:
1625  codec_id = AV_CODEC_ID_PCM_U8;
1626  break;
1627  case 24:
1628  codec_id = AV_CODEC_ID_PCM_S24LE;
1629  break;
1630  case 32:
1631  codec_id = AV_CODEC_ID_PCM_S32LE;
1632  break;
1633  }
1634  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1635  track->audio.bitdepth == 64) {
1636  codec_id = AV_CODEC_ID_PCM_F64LE;
1637  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1638  int profile = matroska_aac_profile(track->codec_id);
1639  int sri = matroska_aac_sri(track->audio.samplerate);
1640  extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1641  if (!extradata)
1642  return AVERROR(ENOMEM);
1643  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1644  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1645  if (strstr(track->codec_id, "SBR")) {
1646  sri = matroska_aac_sri(track->audio.out_samplerate);
1647  extradata[2] = 0x56;
1648  extradata[3] = 0xE5;
1649  extradata[4] = 0x80 | (sri << 3);
1650  extradata_size = 5;
1651  } else
1652  extradata_size = 2;
1653  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1654  /* Only ALAC's magic cookie is stored in Matroska's track headers.
1655  * Create the "atom size", "tag", and "tag version" fields the
1656  * decoder expects manually. */
1657  extradata_size = 12 + track->codec_priv.size;
1658  extradata = av_mallocz(extradata_size +
1660  if (!extradata)
1661  return AVERROR(ENOMEM);
1662  AV_WB32(extradata, extradata_size);
1663  memcpy(&extradata[4], "alac", 4);
1664  AV_WB32(&extradata[8], 0);
1665  memcpy(&extradata[12], track->codec_priv.data,
1666  track->codec_priv.size);
1667  } else if (codec_id == AV_CODEC_ID_TTA) {
1668  extradata_size = 30;
1669  extradata = av_mallocz(extradata_size);
1670  if (!extradata)
1671  return AVERROR(ENOMEM);
1672  ffio_init_context(&b, extradata, extradata_size, 1,
1673  NULL, NULL, NULL, NULL);
1674  avio_write(&b, "TTA1", 4);
1675  avio_wl16(&b, 1);
1676  avio_wl16(&b, track->audio.channels);
1677  avio_wl16(&b, track->audio.bitdepth);
1678  avio_wl32(&b, track->audio.out_samplerate);
1679  avio_wl32(&b, matroska->ctx->duration *
1680  track->audio.out_samplerate);
1681  } else if (codec_id == AV_CODEC_ID_RV10 ||
1682  codec_id == AV_CODEC_ID_RV20 ||
1683  codec_id == AV_CODEC_ID_RV30 ||
1684  codec_id == AV_CODEC_ID_RV40) {
1685  extradata_offset = 26;
1686  } else if (codec_id == AV_CODEC_ID_RA_144) {
1687  track->audio.out_samplerate = 8000;
1688  track->audio.channels = 1;
1689  } else if (codec_id == AV_CODEC_ID_RA_288 ||
1690  codec_id == AV_CODEC_ID_COOK ||
1691  codec_id == AV_CODEC_ID_ATRAC3 ||
1692  codec_id == AV_CODEC_ID_SIPR) {
1693  int flavor;
1694  ffio_init_context(&b, track->codec_priv.data,
1695  track->codec_priv.size,
1696  0, NULL, NULL, NULL, NULL);
1697  avio_skip(&b, 22);
1698  flavor = avio_rb16(&b);
1699  track->audio.coded_framesize = avio_rb32(&b);
1700  avio_skip(&b, 12);
1701  track->audio.sub_packet_h = avio_rb16(&b);
1702  track->audio.frame_size = avio_rb16(&b);
1703  track->audio.sub_packet_size = avio_rb16(&b);
1704  if (flavor <= 0 ||
1705  track->audio.coded_framesize <= 0 ||
1706  track->audio.sub_packet_h <= 0 ||
1707  track->audio.frame_size <= 0 ||
1708  track->audio.sub_packet_size <= 0)
1709  return AVERROR_INVALIDDATA;
1710  track->audio.buf = av_malloc(track->audio.frame_size *
1711  track->audio.sub_packet_h);
1712  if (codec_id == AV_CODEC_ID_RA_288) {
1713  st->codec->block_align = track->audio.coded_framesize;
1714  track->codec_priv.size = 0;
1715  } else {
1716  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1717  const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1718  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1719  st->codec->bit_rate = sipr_bit_rate[flavor];
1720  }
1721  st->codec->block_align = track->audio.sub_packet_size;
1722  extradata_offset = 78;
1723  }
1724  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1725  ret = matroska_parse_flac(s, track, &extradata_offset);
1726  if (ret < 0)
1727  return ret;
1728  }
1729  track->codec_priv.size -= extradata_offset;
1730 
1731  if (codec_id == AV_CODEC_ID_NONE)
1732  av_log(matroska->ctx, AV_LOG_INFO,
1733  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1734 
1735  if (track->time_scale < 0.01)
1736  track->time_scale = 1.0;
1737  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1738  1000 * 1000 * 1000); /* 64 bit pts in ns */
1739 
1740  /* convert the delay from ns to the track timebase */
1741  track->codec_delay = av_rescale_q(track->codec_delay,
1742  (AVRational){ 1, 1000000000 },
1743  st->time_base);
1744 
1745  st->codec->codec_id = codec_id;
1746  st->start_time = 0;
1747  if (strcmp(track->language, "und"))
1748  av_dict_set(&st->metadata, "language", track->language, 0);
1749  av_dict_set(&st->metadata, "title", track->name, 0);
1750 
1751  if (track->flag_default)
1753  if (track->flag_forced)
1755 
1756  if (!st->codec->extradata) {
1757  if (extradata) {
1758  st->codec->extradata = extradata;
1759  st->codec->extradata_size = extradata_size;
1760  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1761  st->codec->extradata = av_mallocz(track->codec_priv.size +
1763  if (!st->codec->extradata)
1764  return AVERROR(ENOMEM);
1765  st->codec->extradata_size = track->codec_priv.size;
1766  memcpy(st->codec->extradata,
1767  track->codec_priv.data + extradata_offset,
1768  track->codec_priv.size);
1769  }
1770  }
1771 
1772  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1774  st->codec->codec_tag = track->video.fourcc;
1775  st->codec->width = track->video.pixel_width;
1776  st->codec->height = track->video.pixel_height;
1778  &st->sample_aspect_ratio.den,
1779  st->codec->height * track->video.display_width,
1780  st->codec->width * track->video.display_height,
1781  255);
1782  if (st->codec->codec_id != AV_CODEC_ID_H264 &&
1785  if (track->default_duration) {
1787  1000000000, track->default_duration, 30000);
1788  }
1789  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1791  st->codec->sample_rate = track->audio.out_samplerate;
1792  st->codec->channels = track->audio.channels;
1793  if (st->codec->codec_id != AV_CODEC_ID_AAC)
1795  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1797  if (st->codec->codec_id == AV_CODEC_ID_SSA)
1798  matroska->contains_ssa = 1;
1799  }
1800  }
1801 
1802  return 0;
1803 }
1804 
1806 {
1807  MatroskaDemuxContext *matroska = s->priv_data;
1808  EbmlList *attachments_list = &matroska->attachments;
1809  EbmlList *chapters_list = &matroska->chapters;
1810  MatroskaAttachment *attachments;
1811  MatroskaChapter *chapters;
1812  uint64_t max_start = 0;
1813  int64_t pos;
1814  Ebml ebml = { 0 };
1815  int i, j, res;
1816 
1817  matroska->ctx = s;
1818 
1819  /* First read the EBML header. */
1820  if (ebml_parse(matroska, ebml_syntax, &ebml) ||
1821  ebml.version > EBML_VERSION ||
1822  ebml.max_size > sizeof(uint64_t) ||
1823  ebml.id_length > sizeof(uint32_t) ||
1824  ebml.doctype_version > 2) {
1825  av_log(matroska->ctx, AV_LOG_ERROR,
1826  "EBML header using unsupported features\n"
1827  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1828  ebml.version, ebml.doctype, ebml.doctype_version);
1829  ebml_free(ebml_syntax, &ebml);
1830  return AVERROR_PATCHWELCOME;
1831  }
1832  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1833  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1834  break;
1835  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1836  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1837  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1838  ebml_free(ebml_syntax, &ebml);
1839  return AVERROR_INVALIDDATA;
1840  }
1841  }
1842  ebml_free(ebml_syntax, &ebml);
1843 
1844  /* The next thing is a segment. */
1845  pos = avio_tell(matroska->ctx->pb);
1846  res = ebml_parse(matroska, matroska_segments, matroska);
1847  // try resyncing until we find a EBML_STOP type element.
1848  while (res != 1) {
1849  res = matroska_resync(matroska, pos);
1850  if (res < 0)
1851  return res;
1852  pos = avio_tell(matroska->ctx->pb);
1853  res = ebml_parse(matroska, matroska_segment, matroska);
1854  }
1855  matroska_execute_seekhead(matroska);
1856 
1857  if (!matroska->time_scale)
1858  matroska->time_scale = 1000000;
1859  if (matroska->duration)
1860  matroska->ctx->duration = matroska->duration * matroska->time_scale *
1861  1000 / AV_TIME_BASE;
1862  av_dict_set(&s->metadata, "title", matroska->title, 0);
1863 
1864  res = matroska_parse_tracks(s);
1865  if (res < 0)
1866  return res;
1867 
1868  attachments = attachments_list->elem;
1869  for (j = 0; j < attachments_list->nb_elem; j++) {
1870  if (!(attachments[j].filename && attachments[j].mime &&
1871  attachments[j].bin.data && attachments[j].bin.size > 0)) {
1872  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1873  } else {
1874  AVStream *st = avformat_new_stream(s, NULL);
1875  if (!st)
1876  break;
1877  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
1878  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
1881  st->codec->extradata = av_malloc(attachments[j].bin.size);
1882  if (!st->codec->extradata)
1883  break;
1884  st->codec->extradata_size = attachments[j].bin.size;
1885  memcpy(st->codec->extradata, attachments[j].bin.data,
1886  attachments[j].bin.size);
1887 
1888  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1889  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
1890  strlen(ff_mkv_mime_tags[i].str))) {
1891  st->codec->codec_id = ff_mkv_mime_tags[i].id;
1892  break;
1893  }
1894  }
1895  attachments[j].stream = st;
1896  }
1897  }
1898 
1899  chapters = chapters_list->elem;
1900  for (i = 0; i < chapters_list->nb_elem; i++)
1901  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
1902  (max_start == 0 || chapters[i].start > max_start)) {
1903  chapters[i].chapter =
1904  avpriv_new_chapter(s, chapters[i].uid,
1905  (AVRational) { 1, 1000000000 },
1906  chapters[i].start, chapters[i].end,
1907  chapters[i].title);
1908  av_dict_set(&chapters[i].chapter->metadata,
1909  "title", chapters[i].title, 0);
1910  max_start = chapters[i].start;
1911  }
1912 
1914 
1915  return 0;
1916 }
1917 
1918 /*
1919  * Put one packet in an application-supplied AVPacket struct.
1920  * Returns 0 on success or -1 on failure.
1921  */
1923  AVPacket *pkt)
1924 {
1925  if (matroska->num_packets > 0) {
1926  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1927  av_free(matroska->packets[0]);
1928  if (matroska->num_packets > 1) {
1929  void *newpackets;
1930  memmove(&matroska->packets[0], &matroska->packets[1],
1931  (matroska->num_packets - 1) * sizeof(AVPacket *));
1932  newpackets = av_realloc(matroska->packets,
1933  (matroska->num_packets - 1) *
1934  sizeof(AVPacket *));
1935  if (newpackets)
1936  matroska->packets = newpackets;
1937  } else {
1938  av_freep(&matroska->packets);
1939  matroska->prev_pkt = NULL;
1940  }
1941  matroska->num_packets--;
1942  return 0;
1943  }
1944 
1945  return -1;
1946 }
1947 
1948 /*
1949  * Free all packets in our internal queue.
1950  */
1952 {
1953  matroska->prev_pkt = NULL;
1954  if (matroska->packets) {
1955  int n;
1956  for (n = 0; n < matroska->num_packets; n++) {
1957  av_free_packet(matroska->packets[n]);
1958  av_free(matroska->packets[n]);
1959  }
1960  av_freep(&matroska->packets);
1961  matroska->num_packets = 0;
1962  }
1963 }
1964 
1966  int *buf_size, int type,
1967  uint32_t **lace_buf, int *laces)
1968 {
1969  int res = 0, n, size = *buf_size;
1970  uint8_t *data = *buf;
1971  uint32_t *lace_size;
1972 
1973  if (!type) {
1974  *laces = 1;
1975  *lace_buf = av_mallocz(sizeof(int));
1976  if (!*lace_buf)
1977  return AVERROR(ENOMEM);
1978 
1979  *lace_buf[0] = size;
1980  return 0;
1981  }
1982 
1983  assert(size > 0);
1984  *laces = *data + 1;
1985  data += 1;
1986  size -= 1;
1987  lace_size = av_mallocz(*laces * sizeof(int));
1988  if (!lace_size)
1989  return AVERROR(ENOMEM);
1990 
1991  switch (type) {
1992  case 0x1: /* Xiph lacing */
1993  {
1994  uint8_t temp;
1995  uint32_t total = 0;
1996  for (n = 0; res == 0 && n < *laces - 1; n++) {
1997  while (1) {
1998  if (size == 0) {
1999  res = AVERROR_EOF;
2000  break;
2001  }
2002  temp = *data;
2003  lace_size[n] += temp;
2004  data += 1;
2005  size -= 1;
2006  if (temp != 0xff)
2007  break;
2008  }
2009  total += lace_size[n];
2010  }
2011  if (size <= total) {
2012  res = AVERROR_INVALIDDATA;
2013  break;
2014  }
2015 
2016  lace_size[n] = size - total;
2017  break;
2018  }
2019 
2020  case 0x2: /* fixed-size lacing */
2021  if (size % (*laces)) {
2022  res = AVERROR_INVALIDDATA;
2023  break;
2024  }
2025  for (n = 0; n < *laces; n++)
2026  lace_size[n] = size / *laces;
2027  break;
2028 
2029  case 0x3: /* EBML lacing */
2030  {
2031  uint64_t num;
2032  uint64_t total;
2033  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2034  if (n < 0) {
2035  av_log(matroska->ctx, AV_LOG_INFO,
2036  "EBML block data error\n");
2037  res = n;
2038  break;
2039  }
2040  data += n;
2041  size -= n;
2042  total = lace_size[0] = num;
2043  for (n = 1; res == 0 && n < *laces - 1; n++) {
2044  int64_t snum;
2045  int r;
2046  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2047  if (r < 0) {
2048  av_log(matroska->ctx, AV_LOG_INFO,
2049  "EBML block data error\n");
2050  res = r;
2051  break;
2052  }
2053  data += r;
2054  size -= r;
2055  lace_size[n] = lace_size[n - 1] + snum;
2056  total += lace_size[n];
2057  }
2058  if (size <= total) {
2059  res = AVERROR_INVALIDDATA;
2060  break;
2061  }
2062  lace_size[*laces - 1] = size - total;
2063  break;
2064  }
2065  }
2066 
2067  *buf = data;
2068  *lace_buf = lace_size;
2069  *buf_size = size;
2070 
2071  return res;
2072 }
2073 
2075  MatroskaTrack *track, AVStream *st,
2076  uint8_t *data, int size, uint64_t timecode,
2077  uint64_t duration, int64_t pos)
2078 {
2079  int a = st->codec->block_align;
2080  int sps = track->audio.sub_packet_size;
2081  int cfs = track->audio.coded_framesize;
2082  int h = track->audio.sub_packet_h;
2083  int y = track->audio.sub_packet_cnt;
2084  int w = track->audio.frame_size;
2085  int x;
2086 
2087  if (!track->audio.pkt_cnt) {
2088  if (track->audio.sub_packet_cnt == 0)
2089  track->audio.buf_timecode = timecode;
2090  if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2091  if (size < cfs * h / 2) {
2092  av_log(matroska->ctx, AV_LOG_ERROR,
2093  "Corrupt int4 RM-style audio packet size\n");
2094  return AVERROR_INVALIDDATA;
2095  }
2096  for (x = 0; x < h / 2; x++)
2097  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2098  data + x * cfs, cfs);
2099  } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2100  if (size < w) {
2101  av_log(matroska->ctx, AV_LOG_ERROR,
2102  "Corrupt sipr RM-style audio packet size\n");
2103  return AVERROR_INVALIDDATA;
2104  }
2105  memcpy(track->audio.buf + y * w, data, w);
2106  } else {
2107  if (size < sps * w / sps) {
2108  av_log(matroska->ctx, AV_LOG_ERROR,
2109  "Corrupt generic RM-style audio packet size\n");
2110  return AVERROR_INVALIDDATA;
2111  }
2112  for (x = 0; x < w / sps; x++)
2113  memcpy(track->audio.buf +
2114  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2115  data + x * sps, sps);
2116  }
2117 
2118  if (++track->audio.sub_packet_cnt >= h) {
2119  if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2120  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2121  track->audio.sub_packet_cnt = 0;
2122  track->audio.pkt_cnt = h * w / a;
2123  }
2124  }
2125 
2126  while (track->audio.pkt_cnt) {
2127  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2128  av_new_packet(pkt, a);
2129  memcpy(pkt->data,
2130  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2131  a);
2132  pkt->pts = track->audio.buf_timecode;
2134  pkt->pos = pos;
2135  pkt->stream_index = st->index;
2136  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2137  }
2138 
2139  return 0;
2140 }
2141 
2142 /* reconstruct full wavpack blocks from mangled matroska ones */
2144  uint8_t **pdst, int *size)
2145 {
2146  uint8_t *dst = NULL;
2147  int dstlen = 0;
2148  int srclen = *size;
2149  uint32_t samples;
2150  uint16_t ver;
2151  int ret, offset = 0;
2152 
2153  if (srclen < 12 || track->stream->codec->extradata_size < 2)
2154  return AVERROR_INVALIDDATA;
2155 
2156  ver = AV_RL16(track->stream->codec->extradata);
2157 
2158  samples = AV_RL32(src);
2159  src += 4;
2160  srclen -= 4;
2161 
2162  while (srclen >= 8) {
2163  int multiblock;
2164  uint32_t blocksize;
2165  uint8_t *tmp;
2166 
2167  uint32_t flags = AV_RL32(src);
2168  uint32_t crc = AV_RL32(src + 4);
2169  src += 8;
2170  srclen -= 8;
2171 
2172  multiblock = (flags & 0x1800) != 0x1800;
2173  if (multiblock) {
2174  if (srclen < 4) {
2175  ret = AVERROR_INVALIDDATA;
2176  goto fail;
2177  }
2178  blocksize = AV_RL32(src);
2179  src += 4;
2180  srclen -= 4;
2181  } else
2182  blocksize = srclen;
2183 
2184  if (blocksize > srclen) {
2185  ret = AVERROR_INVALIDDATA;
2186  goto fail;
2187  }
2188 
2189  tmp = av_realloc(dst, dstlen + blocksize + 32);
2190  if (!tmp) {
2191  ret = AVERROR(ENOMEM);
2192  goto fail;
2193  }
2194  dst = tmp;
2195  dstlen += blocksize + 32;
2196 
2197  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2198  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2199  AV_WL16(dst + offset + 8, ver); // version
2200  AV_WL16(dst + offset + 10, 0); // track/index_no
2201  AV_WL32(dst + offset + 12, 0); // total samples
2202  AV_WL32(dst + offset + 16, 0); // block index
2203  AV_WL32(dst + offset + 20, samples); // number of samples
2204  AV_WL32(dst + offset + 24, flags); // flags
2205  AV_WL32(dst + offset + 28, crc); // crc
2206  memcpy(dst + offset + 32, src, blocksize); // block data
2207 
2208  src += blocksize;
2209  srclen -= blocksize;
2210  offset += blocksize + 32;
2211  }
2212 
2213  *pdst = dst;
2214  *size = dstlen;
2215 
2216  return 0;
2217 
2218 fail:
2219  av_freep(&dst);
2220  return ret;
2221 }
2222 
2224  MatroskaTrack *track, AVStream *st,
2225  uint8_t *data, int pkt_size,
2226  uint64_t timecode, uint64_t duration,
2227  int64_t pos, int is_keyframe)
2228 {
2229  MatroskaTrackEncoding *encodings = track->encodings.elem;
2230  uint8_t *pkt_data = data;
2231  int offset = 0, res;
2232  AVPacket *pkt;
2233 
2234  if (encodings && encodings->scope & 1) {
2235  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2236  if (res < 0)
2237  return res;
2238  }
2239 
2240  if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2241  uint8_t *wv_data;
2242  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2243  if (res < 0) {
2244  av_log(matroska->ctx, AV_LOG_ERROR,
2245  "Error parsing a wavpack block.\n");
2246  goto fail;
2247  }
2248  if (pkt_data != data)
2249  av_freep(&pkt_data);
2250  pkt_data = wv_data;
2251  }
2252 
2253  if (st->codec->codec_id == AV_CODEC_ID_PRORES)
2254  offset = 8;
2255 
2256  pkt = av_mallocz(sizeof(AVPacket));
2257  /* XXX: prevent data copy... */
2258  if (av_new_packet(pkt, pkt_size + offset) < 0) {
2259  av_free(pkt);
2260  return AVERROR(ENOMEM);
2261  }
2262 
2263  if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
2264  uint8_t *buf = pkt->data;
2265  bytestream_put_be32(&buf, pkt_size);
2266  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2267  }
2268 
2269  memcpy(pkt->data + offset, pkt_data, pkt_size);
2270 
2271  if (pkt_data != data)
2272  av_free(pkt_data);
2273 
2274  pkt->flags = is_keyframe;
2275  pkt->stream_index = st->index;
2276 
2277  if (track->ms_compat)
2278  pkt->dts = timecode;
2279  else
2280  pkt->pts = timecode;
2281  pkt->pos = pos;
2282  if (st->codec->codec_id == AV_CODEC_ID_TEXT)
2284  else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
2285  pkt->duration = duration;
2286 
2287  if (st->codec->codec_id == AV_CODEC_ID_SSA)
2288  matroska_fix_ass_packet(matroska, pkt, duration);
2289 
2290  if (matroska->prev_pkt &&
2291  timecode != AV_NOPTS_VALUE &&
2292  matroska->prev_pkt->pts == timecode &&
2293  matroska->prev_pkt->stream_index == st->index &&
2294  st->codec->codec_id == AV_CODEC_ID_SSA)
2295  matroska_merge_packets(matroska->prev_pkt, pkt);
2296  else {
2297  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2298  matroska->prev_pkt = pkt;
2299  }
2300 
2301  return 0;
2302 
2303 fail:
2304  if (pkt_data != data)
2305  av_freep(&pkt_data);
2306  return res;
2307 }
2308 
2310  int size, int64_t pos, uint64_t cluster_time,
2311  uint64_t block_duration, int is_keyframe,
2312  int64_t cluster_pos)
2313 {
2314  uint64_t timecode = AV_NOPTS_VALUE;
2315  MatroskaTrack *track;
2316  int res = 0;
2317  AVStream *st;
2318  int16_t block_time;
2319  uint32_t *lace_size = NULL;
2320  int n, flags, laces = 0;
2321  uint64_t num, duration;
2322 
2323  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2324  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2325  return n;
2326  }
2327  data += n;
2328  size -= n;
2329 
2330  track = matroska_find_track_by_num(matroska, num);
2331  if (!track || !track->stream) {
2332  av_log(matroska->ctx, AV_LOG_INFO,
2333  "Invalid stream %"PRIu64" or size %u\n", num, size);
2334  return AVERROR_INVALIDDATA;
2335  } else if (size <= 3)
2336  return 0;
2337  st = track->stream;
2338  if (st->discard >= AVDISCARD_ALL)
2339  return res;
2340 
2341  block_time = AV_RB16(data);
2342  data += 2;
2343  flags = *data++;
2344  size -= 3;
2345  if (is_keyframe == -1)
2346  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2347 
2348  if (cluster_time != (uint64_t) -1 &&
2349  (block_time >= 0 || cluster_time >= -block_time)) {
2350  timecode = cluster_time + block_time - track->codec_delay;
2351  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2352  timecode < track->end_timecode)
2353  is_keyframe = 0; /* overlapping subtitles are not key frame */
2354  if (is_keyframe)
2355  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2357  }
2358 
2359  if (matroska->skip_to_keyframe &&
2360  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2361  if (!is_keyframe || timecode < matroska->skip_to_timecode)
2362  return res;
2363  matroska->skip_to_keyframe = 0;
2364  }
2365 
2366  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2367  &lace_size, &laces);
2368 
2369  if (res)
2370  goto end;
2371 
2372  if (block_duration != AV_NOPTS_VALUE) {
2373  duration = block_duration / laces;
2374  if (block_duration != duration * laces) {
2375  av_log(matroska->ctx, AV_LOG_WARNING,
2376  "Incorrect block_duration, possibly corrupted container");
2377  }
2378  } else {
2379  duration = track->default_duration / matroska->time_scale;
2380  block_duration = duration * laces;
2381  }
2382 
2383  if (timecode != AV_NOPTS_VALUE)
2384  track->end_timecode =
2385  FFMAX(track->end_timecode, timecode + block_duration);
2386 
2387  for (n = 0; n < laces; n++) {
2388  if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2389  st->codec->codec_id == AV_CODEC_ID_COOK ||
2390  st->codec->codec_id == AV_CODEC_ID_SIPR ||
2391  st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2392  st->codec->block_align && track->audio.sub_packet_size) {
2393  res = matroska_parse_rm_audio(matroska, track, st, data,
2394  lace_size[n],
2395  timecode, duration, pos);
2396  if (res)
2397  goto end;
2398  } else {
2399  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2400  timecode, duration, pos,
2401  !n ? is_keyframe : 0);
2402  if (res)
2403  goto end;
2404  }
2405 
2406  if (timecode != AV_NOPTS_VALUE)
2407  timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2408  data += lace_size[n];
2409  }
2410 
2411 end:
2412  av_free(lace_size);
2413  return res;
2414 }
2415 
2417 {
2418  EbmlList *blocks_list;
2419  MatroskaBlock *blocks;
2420  int i, res;
2421  res = ebml_parse(matroska,
2422  matroska_cluster_incremental_parsing,
2423  &matroska->current_cluster);
2424  if (res == 1) {
2425  /* New Cluster */
2426  if (matroska->current_cluster_pos)
2427  ebml_level_end(matroska);
2428  ebml_free(matroska_cluster, &matroska->current_cluster);
2429  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2430  matroska->current_cluster_num_blocks = 0;
2431  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2432  matroska->prev_pkt = NULL;
2433  /* sizeof the ID which was already read */
2434  if (matroska->current_id)
2435  matroska->current_cluster_pos -= 4;
2436  res = ebml_parse(matroska,
2437  matroska_clusters_incremental,
2438  &matroska->current_cluster);
2439  /* Try parsing the block again. */
2440  if (res == 1)
2441  res = ebml_parse(matroska,
2442  matroska_cluster_incremental_parsing,
2443  &matroska->current_cluster);
2444  }
2445 
2446  if (!res &&
2447  matroska->current_cluster_num_blocks <
2448  matroska->current_cluster.blocks.nb_elem) {
2449  blocks_list = &matroska->current_cluster.blocks;
2450  blocks = blocks_list->elem;
2451 
2452  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2453  i = blocks_list->nb_elem - 1;
2454  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2455  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2456  if (!blocks[i].non_simple)
2457  blocks[i].duration = AV_NOPTS_VALUE;
2458  res = matroska_parse_block(matroska, blocks[i].bin.data,
2459  blocks[i].bin.size, blocks[i].bin.pos,
2460  matroska->current_cluster.timecode,
2461  blocks[i].duration, is_keyframe,
2462  matroska->current_cluster_pos);
2463  }
2464  }
2465 
2466  if (res < 0)
2467  matroska->done = 1;
2468  return res;
2469 }
2470 
2472 {
2473  MatroskaCluster cluster = { 0 };
2474  EbmlList *blocks_list;
2475  MatroskaBlock *blocks;
2476  int i, res;
2477  int64_t pos;
2478 
2479  if (!matroska->contains_ssa)
2480  return matroska_parse_cluster_incremental(matroska);
2481  pos = avio_tell(matroska->ctx->pb);
2482  matroska->prev_pkt = NULL;
2483  if (matroska->current_id)
2484  pos -= 4; /* sizeof the ID which was already read */
2485  res = ebml_parse(matroska, matroska_clusters, &cluster);
2486  blocks_list = &cluster.blocks;
2487  blocks = blocks_list->elem;
2488  for (i = 0; i < blocks_list->nb_elem && !res; i++)
2489  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2490  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2491  if (!blocks[i].non_simple)
2492  blocks[i].duration = AV_NOPTS_VALUE;
2493  res = matroska_parse_block(matroska, blocks[i].bin.data,
2494  blocks[i].bin.size, blocks[i].bin.pos,
2495  cluster.timecode, blocks[i].duration,
2496  is_keyframe, pos);
2497  }
2498  ebml_free(matroska_cluster, &cluster);
2499  return res;
2500 }
2501 
2503 {
2504  MatroskaDemuxContext *matroska = s->priv_data;
2505  int ret = 0;
2506 
2507  while (!ret && matroska_deliver_packet(matroska, pkt)) {
2508  int64_t pos = avio_tell(matroska->ctx->pb);
2509  if (matroska->done)
2510  return AVERROR_EOF;
2511  if (matroska_parse_cluster(matroska) < 0)
2512  ret = matroska_resync(matroska, pos);
2513  }
2514 
2515  if (ret == AVERROR_INVALIDDATA && pkt->data) {
2516  pkt->flags |= AV_PKT_FLAG_CORRUPT;
2517  return 0;
2518  }
2519 
2520  return ret;
2521 }
2522 
2523 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2524  int64_t timestamp, int flags)
2525 {
2526  MatroskaDemuxContext *matroska = s->priv_data;
2527  MatroskaTrack *tracks = matroska->tracks.elem;
2528  AVStream *st = s->streams[stream_index];
2529  int i, index, index_sub, index_min;
2530 
2531  /* Parse the CUES now since we need the index data to seek. */
2532  if (matroska->cues_parsing_deferred) {
2533  matroska_parse_cues(matroska);
2534  matroska->cues_parsing_deferred = 0;
2535  }
2536 
2537  if (!st->nb_index_entries)
2538  return 0;
2539  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2540 
2541  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2542  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
2543  SEEK_SET);
2544  matroska->current_id = 0;
2545  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2546  matroska_clear_queue(matroska);
2547  if (matroska_parse_cluster(matroska) < 0)
2548  break;
2549  }
2550  }
2551 
2552  matroska_clear_queue(matroska);
2553  if (index < 0)
2554  return 0;
2555 
2556  index_min = index;
2557  for (i = 0; i < matroska->tracks.nb_elem; i++) {
2558  tracks[i].audio.pkt_cnt = 0;
2559  tracks[i].audio.sub_packet_cnt = 0;
2560  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2561  tracks[i].end_timecode = 0;
2562  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2563  tracks[i].stream->discard != AVDISCARD_ALL) {
2564  index_sub = av_index_search_timestamp(
2565  tracks[i].stream, st->index_entries[index].timestamp,
2567  if (index_sub >= 0 &&
2568  st->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
2569  st->index_entries[index].timestamp -
2570  st->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
2571  index_min = index_sub;
2572  }
2573  }
2574 
2575  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2576  matroska->current_id = 0;
2577  matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2578  matroska->skip_to_timecode = st->index_entries[index].timestamp;
2579  matroska->done = 0;
2580  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2581  return 0;
2582 }
2583 
2585 {
2586  MatroskaDemuxContext *matroska = s->priv_data;
2587  MatroskaTrack *tracks = matroska->tracks.elem;
2588  int n;
2589 
2590  matroska_clear_queue(matroska);
2591 
2592  for (n = 0; n < matroska->tracks.nb_elem; n++)
2593  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2594  av_free(tracks[n].audio.buf);
2595  ebml_free(matroska_cluster, &matroska->current_cluster);
2596  ebml_free(matroska_segment, matroska);
2597 
2598  return 0;
2599 }
2600 
2602  .name = "matroska,webm",
2603  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2604  .priv_data_size = sizeof(MatroskaDemuxContext),
2610  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
2611 };
const char * s
Definition: matroskadec.c:84
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:1609
static EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:451
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:98
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:336
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
Definition: matroskadec.c:1303
Bytestream IO Context.
Definition: avio.h:68
#define MATROSKA_ID_VIDEOFLAGINTERLACED
Definition: matroska.h:115
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1269
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:105
int size
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:243
uint64_t type
Definition: matroskadec.c:148
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:95
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:1922
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:107
uint64_t version
Definition: matroskadec.c:101
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:2601
static int is_keyframe(NalUnitType naltype)
Definition: libx265.c:47
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:1160
enum AVCodecID id
Definition: mxfenc.c:84
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:140
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:1922
#define MATROSKA_ID_CODECPRIVATE
Definition: matroska.h:84
const unsigned char ff_sipr_subpk_size[4]
Definition: rmsipr.c:25
#define MATROSKA_ID_TAGTARGETS_TYPE
Definition: matroska.h:156
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
static int ebml_level_end(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:604
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:992
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:800
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:2800
int64_t pos
Definition: avformat.h:660
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:130
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:124
uint64_t chapteruid
Definition: matroskadec.c:207
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:1611
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:93
EbmlList tag
Definition: matroskadec.c:213
#define CONFIG_ZLIB
Definition: config.h:339
uint64_t uid
Definition: matroskadec.c:147
static EbmlSyntax matroska_segments[]
Definition: matroskadec.c:504
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
MatroskaCluster current_cluster
Definition: matroskadec.c:269
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:769
#define MATROSKA_ID_TAGTARGETS_ATTACHUID
Definition: matroska.h:160
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:700
int size
Definition: avcodec.h:968
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:171
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:186
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:187
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:878
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:179
uint64_t flag_forced
Definition: matroskadec.c:156
uint64_t max_size
Definition: matroskadec.c:102
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:159
#define AV_RL16
Definition: intreadwrite.h:42
uint64_t flag_default
Definition: matroskadec.c:155
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:117
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:125
char * name
Definition: matroskadec.c:196
#define FF_ARRAY_ELEMS(a)
discard all
Definition: avcodec.h:568
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:236
static EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:327
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:144
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:580
MatroskaTrackAudio audio
Definition: matroskadec.c:158
uint64_t duration
Definition: matroskadec.c:276
const struct EbmlSyntax * n
Definition: matroskadec.c:85
#define CONFIG_LZO
Definition: config.h:371
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:200
#define MATROSKA_ID_CLUSTERTIMECODE
Definition: matroska.h:170
#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:1822
static EbmlSyntax matroska_tag[]
Definition: matroskadec.c:470
static EbmlSyntax matroska_attachment[]
Definition: matroskadec.c:387
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:194
static int64_t duration
Definition: avplay.c:246
static EbmlSyntax matroska_track[]
Definition: matroskadec.c:354
#define MATROSKA_ID_TRACKCONTENTENCODINGS
Definition: matroska.h:99
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
#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:2572
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:184
Format I/O context.
Definition: avformat.h:922
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:199
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:1083
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:100
#define MATROSKA_ID_CODECDOWNLOADURL
Definition: matroska.h:87
int64_t end_timecode
Definition: matroskadec.c:163
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1035
Public dictionary API.
uint64_t pixel_height
Definition: matroskadec.c:124
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:260
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:197
MatroskaTrackVideo video
Definition: matroskadec.c:157
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:201
void * elem
Definition: matroskadec.c:91
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:91
#define AV_WB32(p, d)
Definition: intreadwrite.h:239
MatroskaTrackCompression compression
Definition: matroskadec.c:116
uint8_t * data
Definition: matroskadec.c:96
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:69
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:595
uint64_t time
Definition: matroskadec.c:191
#define AV_RB32
Definition: intreadwrite.h:130
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:111
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1431
enum AVStreamParseType need_parsing
Definition: avformat.h:867
#define b
Definition: input.c:52
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:174
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:157
#define AV_WL32(p, d)
Definition: intreadwrite.h:255
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:199
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
static EbmlSyntax matroska_cluster[]
Definition: matroskadec.c:519
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1158
const char * name
AVStream * stream
Definition: matroskadec.c:173
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2497
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:85
char * language
Definition: matroskadec.c:152
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:990
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, int64_t cluster_pos)
Definition: matroskadec.c:2309
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:122
const char data[16]
Definition: mxf.c:70
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:38
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1033
uint8_t * data
Definition: avcodec.h:967
uint64_t typevalue
Definition: matroskadec.c:205
uint64_t codec_delay
Definition: matroskadec.c:160
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2416
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:106
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:198
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
static int flags
Definition: log.c:44
uint32_t tag
Definition: movenc.c:844
static EbmlSyntax ebml_header[]
Definition: matroskadec.c:282
#define AVERROR_EOF
End of file.
Definition: error.h:51
#define MATROSKA_ID_CODECDECODEALL
Definition: matroska.h:88
enum AVCodecID id
Definition: internal.h:42
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
const uint8_t ff_log2_tab[256]
Definition: log2_tab.c:21
static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska, AVPacket *pkt, uint64_t display_duration)
Definition: matroskadec.c:1177
#define MATROSKA_ID_CUES
Definition: matroska.h:58
#define EBML_MAX_DEPTH
Definition: matroska.h:252
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:660
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:219
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:165
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:985
#define MATROSKA_ID_SEGMENTUID
Definition: matroska.h:72
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:452
static EbmlSyntax matroska_tracks[]
Definition: matroskadec.c:382
EbmlList sub
Definition: matroskadec.c:200
#define r
Definition: input.c:51
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1013
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2471
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:851
#define MATROSKA_ID_CUEBLOCKNUMBER
Definition: matroska.h:145
#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:129
uint64_t display_height
Definition: matroskadec.c:122
static EbmlSyntax matroska_info[]
Definition: matroskadec.c:298
#define MATROSKA_ID_ENCODINGORDER
Definition: matroska.h:128
#define MATROSKA_ID_VIDEOSTEREOMODE
Definition: matroska.h:116
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:81
#define AVINDEX_KEYFRAME
Definition: avformat.h:662
EbmlType type
Definition: matroskadec.c:78
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:167
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:105
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1130
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:178
#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:1201
static const uint16_t mask[17]
Definition: lzw.c:38
FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.
static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb, uint64_t *number)
Read a EBML length value.
Definition: matroskadec.c:673
#define AV_RB16
Definition: intreadwrite.h:53
AVChapter * chapter
Definition: matroskadec.c:182
#define AVERROR(e)
Definition: error.h:43
static EbmlSyntax matroska_index[]
Definition: matroskadec.c:446
int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
Definition: riffdec.c:78
int64_t timestamp
Definition: avformat.h:661
#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:150
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:186
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num)
Definition: matroskadec.c:789
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:1011
uint64_t display_width
Definition: matroskadec.c:121
#define MATROSKA_ID_WRITINGAPP
Definition: matroska.h:69
static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int size, uint64_t timecode, uint64_t duration, int64_t pos)
Definition: matroskadec.c:2074
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:170
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:950
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:154
Definition: graph2dot.c:49
static EbmlSyntax matroska_clusters[]
Definition: matroskadec.c:528
static EbmlSyntax matroska_chapter[]
Definition: matroskadec.c:419
enum AVCodecID id
Definition: matroska.h:248
#define MATROSKA_ID_VIDEOPIXELCROPR
Definition: matroska.h:113
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:168
#define MATROSKA_ID_ENCODINGCOMPSETTINGS
Definition: matroska.h:133
#define EBML_ID_EBMLMAXIDLENGTH
Definition: matroska.h:38
#define MATROSKA_ID_CHAPTERFLAGHIDDEN
Definition: matroska.h:203
enum AVCodecID codec_id
Definition: mov_chan.c:432
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:780
uint64_t timecode
Definition: matroskadec.c:227
#define FFMAX(a, b)
Definition: common.h:55
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:81
static EbmlSyntax matroska_attachments[]
Definition: matroskadec.c:396
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:973
static EbmlSyntax matroska_cluster_incremental_parsing[]
Definition: matroskadec.c:537
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1846
Only parse headers, do not repack.
Definition: avformat.h:654
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:443
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:718
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:960
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:89
int nb_elem
Definition: matroskadec.c:90
#define MATROSKA_ID_TAG
Definition: matroska.h:148
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:398
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:397
char * lang
Definition: matroskadec.c:198
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:680
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:531
static EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:428
uint64_t skip_to_timecode
Definition: matroskadec.c:262
Definition: dct-test.c:50
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:1805
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1382
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:1108
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1355
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:64
uint64_t start
Definition: matroskadec.c:177
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:234
#define FFMIN(a, b)
Definition: common.h:57
#define MATROSKA_ID_TAGTARGETS
Definition: matroska.h:155
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:29
AVPacket ** packets
Definition: matroskadec.c:254
#define MATROSKA_ID_TAGNAME
Definition: matroska.h:150
union EbmlSyntax::@108 def
#define MATROSKA_ID_TRACKTIMECODESCALE
Definition: matroska.h:101
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
#define CONFIG_BZLIB
Definition: config.h:303
static int ebml_parse_elem(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:882
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:627
int width
picture width / height.
Definition: avcodec.h:1218
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:204
uint64_t id_length
Definition: matroskadec.c:103
static EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:349
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num)
Definition: matroskadec.c:1034
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: avio.h:210
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:149
uint64_t doctype_version
Definition: matroskadec.c:105
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
static EbmlSyntax matroska_track_encoding[]
Definition: matroskadec.c:341
#define MATROSKA_ID_TRACKMAXCACHE
Definition: matroska.h:97
int data_offset
Definition: matroskadec.c:80
#define MATROSKA_ID_CHAPTERPHYSEQUIV
Definition: matroska.h:205
static int matroska_read_close(AVFormatContext *s)
Definition: matroskadec.c:2584
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
EbmlBin codec_priv
Definition: matroskadec.c:151
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
Definition: matroskadec.c:723
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1048
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:192
#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
#define AV_EF_EXPLODE
Definition: avcodec.h:2411
AVDictionary * metadata
Definition: avformat.h:771
Opaque data information usually sparse.
Definition: avutil.h:191
#define MATROSKA_ID_VIDEOCOLORSPACE
Definition: matroska.h:118
static EbmlSyntax matroska_segment[]
Definition: matroskadec.c:492
#define MATROSKA_ID_CHAPTERS
Definition: matroska.h:63
static int matroska_probe(AVProbeData *p)
Definition: matroskadec.c:992
#define EBML_ID_VOID
Definition: matroska.h:45
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1234
#define MATROSKA_ID_AUDIOSAMPLINGFREQ
Definition: matroska.h:121
double f
Definition: matroskadec.c:83
#define MATROSKA_ID_TRACKMINCACHE
Definition: matroska.h:96
static int matroska_parse_flac(AVFormatContext *s, MatroskaTrack *track, int *offset)
Definition: matroskadec.c:1441
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:544
if(ac->has_optimized_func)
static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: matroskadec.c:2523
static EbmlSyntax matroska_seekhead[]
Definition: matroskadec.c:487
Stream structure.
Definition: avformat.h:699
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:2143
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
NULL
Definition: eval.c:55
EbmlList encodings
Definition: matroskadec.c:159
char * codec_id
Definition: matroskadec.c:150
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:668
int64_t current_cluster_pos
Definition: matroskadec.c:268
#define MATROSKA_ID_VIDEOPIXELCROPB
Definition: matroska.h:110
#define AV_LOG_INFO
Standard information.
Definition: log.h:134
static int matroska_parse_tracks(AVFormatContext *s)
Definition: matroskadec.c:1496
#define MATROSKA_ID_TRACKFLAGFORCED
Definition: matroska.h:94
#define MATROSKA_ID_TAGS
Definition: matroska.h:59
enum AVMediaType codec_type
Definition: avcodec.h:1052
version
Definition: ffv1enc.c:1080
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
Definition: matroskadec.c:767
enum AVCodecID codec_id
Definition: avcodec.h:1061
#define MATROSKA_ID_TAGDEFAULT
Definition: matroska.h:153
#define MATROSKA_ID_SEEKID
Definition: matroska.h:166
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:213
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:65
int sample_rate
samples per second
Definition: avcodec.h:1785
AVIOContext * pb
I/O context.
Definition: avformat.h:964
#define MATROSKA_ID_ENCODINGCOMPALGO
Definition: matroska.h:132
#define MATROSKA_ID_BLOCK
Definition: matroska.h:177
#define MATROSKA_ID_INFO
Definition: matroska.h:56
#define MATROSKA_ID_TAGTARGETS_TRACKUID
Definition: matroska.h:158
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define MATROSKA_ID_TAGLANG
Definition: matroska.h:152
static EbmlSyntax matroska_tags[]
Definition: matroskadec.c:476
uint64_t pixel_width
Definition: matroskadec.c:123
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1076
#define MATROSKA_ID_TRACKFLAGENABLED
Definition: matroska.h:92
#define MATROSKA_ID_TRACKS
Definition: matroska.h:57
int extradata_size
Definition: avcodec.h:1159
#define MATROSKA_ID_TRACKNAME
Definition: matroska.h:90
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
uint64_t start
Definition: matroskadec.c:222
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:68
static EbmlSyntax matroska_cluster_incremental[]
Definition: matroskadec.c:551
int nb_index_entries
Definition: avformat.h:880
#define MATROSKA_ID_SEEKENTRY
Definition: matroska.h:163
EbmlList pos
Definition: matroskadec.c:192
uint64_t u
Definition: matroskadec.c:82
#define MATROSKA_ID_EDITIONENTRY
Definition: matroska.h:191
int index
Definition: gxfenc.c:72
#define MATROSKA_ID_BLOCKGROUP
Definition: matroska.h:173
#define MATROSKA_ID_VIDEOPIXELHEIGHT
Definition: matroska.h:109
rational number numerator/denominator
Definition: rational.h:43
AVStream * stream
Definition: matroskadec.c:162
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, int *buf_size, int type, uint32_t **lace_buf, int *laces)
Definition: matroskadec.c:1965
#define MATROSKA_ID_CUETIME
Definition: matroska.h:139
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:2502
static EbmlSyntax matroska_blockgroup[]
Definition: matroskadec.c:509
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:838
static av_always_inline void flac_parse_block_header(const uint8_t *block_header, int *last, int *type, int *size)
Parse the metadata block parameters from the header.
Definition: flac.h:143
#define MATROSKA_ID_TITLE
Definition: matroska.h:68
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:402
AVFormatContext * ctx
Definition: matroskadec.c:232
#define MATROSKA_ID_TRACKVIDEO
Definition: matroska.h:82
int size
Definition: matroskadec.c:95
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:395
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, uint32_t id, void *data)
Definition: matroskadec.c:819
int list_elem_size
Definition: matroskadec.c:79
static EbmlSyntax ebml_syntax[]
Definition: matroskadec.c:293
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:91
#define MATROSKA_ID_VIDEOFRAMERATE
Definition: matroska.h:105
#define MATROSKA_ID_ATTACHMENTS
Definition: matroska.h:61
int64_t pos
Definition: matroskadec.c:97
#define MATROSKA_ID_CHAPTERDISPLAY
Definition: matroska.h:195
uint8_t level
Definition: svq3.c:147
#define MATROSKA_ID_FILENAME
Definition: matroska.h:185
const int avpriv_mpeg4audio_sample_rates[16]
Definition: mpeg4audio.c:55
const AVMetadataConv ff_mkv_metadata_conv[]
Definition: matroska.c:101
#define MATROSKA_ID_CODECID
Definition: matroska.h:83
static EbmlSyntax matroska_clusters_incremental[]
Definition: matroskadec.c:560
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:404
A reference to a data buffer.
Definition: buffer.h:81
int64_t reference
Definition: matroskadec.c:277
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:141
uint64_t num
Definition: matroskadec.c:146
#define MATROSKA_ID_CUETRACK
Definition: matroska.h:143
static EbmlSyntax matroska_track_encoding_compression[]
Definition: matroskadec.c:335
EbmlType
Definition: matroskadec.c:63
#define MATROSKA_ID_SEEKPOSITION
Definition: matroska.h:167
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
Definition: matroskadec.c:571
#define MATROSKA_ID_CODECDELAY
Definition: matroska.h:89
#define MATROSKA_ID_CHAPTERTIMESTART
Definition: matroska.h:193
double time_scale
Definition: matroskadec.c:153
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:70
void * av_realloc(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:117
raw UTF-8 text
Definition: avcodec.h:452
char * string
Definition: matroskadec.c:197
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
Definition: avformat.h:749
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1152
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:760
char * doctype
Definition: matroskadec.c:104
static EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:481
int av_grow_packet(AVPacket *pkt, int grow_by)
Increase packet size, correctly zeroing padding.
Definition: avpacket.c:109
int den
denominator
Definition: rational.h:45
#define MATROSKA_ID_SEGMENT
Definition: matroska.h:53
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1014
uint32_t id
Definition: matroskadec.c:77
static EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:461
MatroskaTagTarget target
Definition: matroskadec.c:212
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
#define MKBETAG(a, b, c, d)
Definition: common.h:239
#define MATROSKA_ID_SEEKHEAD
Definition: matroska.h:60
#define EBML_ID_HEADER
Definition: matroska.h:33
#define MATROSKA_ID_ENCODINGCOMPRESSION
Definition: matroska.h:131
#define MATROSKA_ID_CLUSTERPREVSIZE
Definition: matroska.h:172
char * value
Definition: dict.h:76
int eof_reached
true if eof reached
Definition: avio.h:96
#define MATROSKA_ID_POINTENTRY
Definition: matroska.h:136
int len
int channels
number of audio channels
Definition: avcodec.h:1786
#define MATROSKA_ID_FILEUID
Definition: matroska.h:188
#define MATROSKA_ID_VIDEOPIXELCROPL
Definition: matroska.h:112
void * priv_data
Format private data.
Definition: avformat.h:950
uint64_t non_simple
Definition: matroskadec.c:278
#define MATROSKA_ID_CHAPTERUID
Definition: matroska.h:202
static EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c:440
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
Definition: matroskadec.c:746
#define MATROSKA_ID_VIDEODISPLAYUNIT
Definition: matroska.h:114
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
Definition: matroskadec.c:686
#define MATROSKA_ID_TRACKMAXBLKADDID
Definition: matroska.h:102
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:966
#define EBML_ID_EBMLMAXSIZELENGTH
Definition: matroska.h:39
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1017
#define MATROSKA_ID_CHAPSTRING
Definition: matroska.h:196
static int matroska_merge_packets(AVPacket *out, AVPacket *in)
Definition: matroskadec.c:1220
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:525
#define MATROSKA_ID_TAGSTRING
Definition: matroska.h:151
static EbmlSyntax matroska_index_pos[]
Definition: matroskadec.c:433
static int ebml_read_float(AVIOContext *pb, int size, double *num)
Definition: matroskadec.c:705
#define MATROSKA_ID_DURATION
Definition: matroska.h:67
uint64_t length
Definition: matroskadec.c:223
#define AV_WL16(p, d)
Definition: intreadwrite.h:225
static int matroska_aac_profile(char *codec_id)
Definition: matroskadec.c:1420
int stream_index
Definition: avcodec.h:969
#define EBML_ID_DOCTYPEVERSION
Definition: matroska.h:41
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1951
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:741
static EbmlSyntax matroska_chapter_entry[]
Definition: matroskadec.c:407
uint8_t bitdepth
Definition: dirac.c:83
#define MKTAG(a, b, c, d)
Definition: common.h:238
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:762
#define MATROSKA_ID_ATTACHEDFILE
Definition: matroska.h:183
EbmlList blocks
Definition: matroskadec.c:228
This structure stores compressed data.
Definition: avcodec.h:944
static EbmlSyntax matroska_chapter_display[]
Definition: matroskadec.c:401
#define MATROSKA_ID_CODECSTATE
Definition: matroska.h:180
uint64_t default_duration
Definition: matroskadec.c:154
static int matroska_parse_frame(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int pkt_size, uint64_t timecode, uint64_t duration, int64_t pos, int is_keyframe)
Definition: matroskadec.c:2223
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:205
#define MATROSKA_ID_CODECINFOURL
Definition: matroska.h:86
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:960
#define MATROSKA_ID_VIDEOPIXELWIDTH
Definition: matroska.h:108
#define MATROSKA_ID_TRACKAUDIO
Definition: matroska.h:81
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:228
#define av_unused
Definition: attributes.h:86
#define MATROSKA_ID_ENCODINGSCOPE
Definition: matroska.h:129
const CodecTags ff_mkv_codec_tags[]
Definition: matroska.c:24
static const char *const matroska_doctypes[]
Definition: matroskadec.c:569
static EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:309
uint64_t attachuid
Definition: matroskadec.c:208