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;
126  uint64_t stereo_mode;
128 
129 typedef struct {
130  double samplerate;
132  uint64_t bitdepth;
133  uint64_t channels;
134 
135  /* real audio header (extracted from extradata) */
141  int pkt_cnt;
142  uint64_t buf_timecode;
145 
146 typedef struct {
147  uint64_t num;
148  uint64_t uid;
149  uint64_t type;
150  char *name;
151  char *codec_id;
153  char *language;
154  double time_scale;
156  uint64_t flag_default;
157  uint64_t flag_forced;
161  uint64_t codec_delay;
162 
164  int64_t end_timecode;
166 } MatroskaTrack;
167 
168 typedef struct {
169  uint64_t uid;
170  char *filename;
171  char *mime;
173 
176 
177 typedef struct {
178  uint64_t start;
179  uint64_t end;
180  uint64_t uid;
181  char *title;
182 
185 
186 typedef struct {
187  uint64_t track;
188  uint64_t pos;
190 
191 typedef struct {
192  uint64_t time;
194 } MatroskaIndex;
195 
196 typedef struct {
197  char *name;
198  char *string;
199  char *lang;
200  uint64_t def;
202 } MatroskaTag;
203 
204 typedef struct {
205  char *type;
206  uint64_t typevalue;
207  uint64_t trackuid;
208  uint64_t chapteruid;
209  uint64_t attachuid;
211 
212 typedef struct {
215 } MatroskaTags;
216 
217 typedef struct {
218  uint64_t id;
219  uint64_t pos;
221 
222 typedef struct {
223  uint64_t start;
224  uint64_t length;
225 } MatroskaLevel;
226 
227 typedef struct {
228  uint64_t timecode;
231 
232 typedef struct {
234 
235  /* EBML stuff */
238  int level_up;
239  uint32_t current_id;
240 
241  uint64_t time_scale;
242  double duration;
243  char *title;
250 
251  /* byte position of the segment inside the stream */
252  int64_t segment_start;
253 
254  /* the packet queue */
258 
259  int done;
260 
261  /* What to skip before effectively reading a packet. */
264 
265  /* File has a CUES element, but we defer parsing until it is needed. */
267 
271 
272  /* File has SSA subtitles which prevent incremental cluster parsing. */
275 
276 typedef struct {
277  uint64_t duration;
278  int64_t reference;
279  uint64_t non_simple;
281 } MatroskaBlock;
282 
284  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
285  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
286  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
287  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
288  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
291  { 0 }
292 };
293 
295  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
296  { 0 }
297 };
298 
300  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
302  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
307  { 0 }
308 };
309 
311  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
312  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width) },
313  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height) },
314  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
315  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
316  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, fourcc) },
325  { 0 }
326 };
327 
329  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
330  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
332  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
333  { 0 }
334 };
335 
339  { 0 }
340 };
341 
343  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
344  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
345  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
347  { 0 }
348 };
349 
351  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
352  { 0 }
353 };
354 
356  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
358  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
359  { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
361  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
362  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
363  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
364  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
365  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
366  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
367  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
368  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
369  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
370  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
380  { 0 }
381 };
382 
384  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
385  { 0 }
386 };
387 
389  { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
390  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
391  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
392  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
394  { 0 }
395 };
396 
398  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
399  { 0 }
400 };
401 
403  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
405  { 0 }
406 };
407 
409  { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
410  { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
411  { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
412  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
417  { 0 }
418 };
419 
421  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
426  { 0 }
427 };
428 
430  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
431  { 0 }
432 };
433 
435  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
438  { 0 }
439 };
440 
442  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
443  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
444  { 0 }
445 };
446 
448  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
449  { 0 }
450 };
451 
453  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
454  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
455  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
456  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
457  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
458  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
459  { 0 }
460 };
461 
463  { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
464  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
465  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
466  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
467  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
468  { 0 }
469 };
470 
472  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
473  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
474  { 0 }
475 };
476 
478  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
479  { 0 }
480 };
481 
483  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
484  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
485  { 0 }
486 };
487 
489  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
490  { 0 }
491 };
492 
494  { MATROSKA_ID_INFO, EBML_NEST, 0, 0, { .n = matroska_info } },
495  { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, { .n = matroska_tracks } },
496  { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, { .n = matroska_attachments } },
497  { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, { .n = matroska_chapters } },
498  { MATROSKA_ID_CUES, EBML_NEST, 0, 0, { .n = matroska_index } },
499  { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, { .n = matroska_tags } },
500  { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, { .n = matroska_seekhead } },
502  { 0 }
503 };
504 
506  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
507  { 0 }
508 };
509 
511  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
512  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
514  { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock, reference) },
516  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
517  { 0 }
518 };
519 
521  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
522  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
523  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
526  { 0 }
527 };
528 
530  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
535  { 0 }
536 };
537 
539  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
540  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
541  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
549  { 0 }
550 };
551 
553  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
558  { 0 }
559 };
560 
562  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
567  { 0 }
568 };
569 
570 static const char *const matroska_doctypes[] = { "matroska", "webm" };
571 
572 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
573 {
574  AVIOContext *pb = matroska->ctx->pb;
575  uint32_t id;
576  matroska->current_id = 0;
577  matroska->num_levels = 0;
578 
579  /* seek to next position to resync from */
580  if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
581  goto eof;
582 
583  id = avio_rb32(pb);
584 
585  // try to find a toplevel element
586  while (!pb->eof_reached) {
587  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
588  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
590  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
591  matroska->current_id = id;
592  return 0;
593  }
594  id = (id << 8) | avio_r8(pb);
595  }
596 
597 eof:
598  matroska->done = 1;
599  return AVERROR_EOF;
600 }
601 
602 /*
603  * Return: Whether we reached the end of a level in the hierarchy or not.
604  */
606 {
607  AVIOContext *pb = matroska->ctx->pb;
608  int64_t pos = avio_tell(pb);
609 
610  if (matroska->num_levels > 0) {
611  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
612  if (pos - level->start >= level->length || matroska->current_id) {
613  matroska->num_levels--;
614  return 1;
615  }
616  }
617  return 0;
618 }
619 
620 /*
621  * Read: an "EBML number", which is defined as a variable-length
622  * array of bytes. The first byte indicates the length by giving a
623  * number of 0-bits followed by a one. The position of the first
624  * "one" bit inside the first byte indicates the length of this
625  * number.
626  * Returns: number of bytes read, < 0 on error
627  */
629  int max_size, uint64_t *number)
630 {
631  int read = 1, n = 1;
632  uint64_t total = 0;
633 
634  /* The first byte tells us the length in bytes - avio_r8() can normally
635  * return 0, but since that's not a valid first ebmlID byte, we can
636  * use it safely here to catch EOS. */
637  if (!(total = avio_r8(pb))) {
638  /* we might encounter EOS here */
639  if (!pb->eof_reached) {
640  int64_t pos = avio_tell(pb);
641  av_log(matroska->ctx, AV_LOG_ERROR,
642  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
643  pos, pos);
644  return pb->error ? pb->error : AVERROR(EIO);
645  }
646  return AVERROR_EOF;
647  }
648 
649  /* get the length of the EBML number */
650  read = 8 - ff_log2_tab[total];
651  if (read > max_size) {
652  int64_t pos = avio_tell(pb) - 1;
653  av_log(matroska->ctx, AV_LOG_ERROR,
654  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
655  (uint8_t) total, pos, pos);
656  return AVERROR_INVALIDDATA;
657  }
658 
659  /* read out length */
660  total ^= 1 << ff_log2_tab[total];
661  while (n++ < read)
662  total = (total << 8) | avio_r8(pb);
663 
664  *number = total;
665 
666  return read;
667 }
668 
675  uint64_t *number)
676 {
677  int res = ebml_read_num(matroska, pb, 8, number);
678  if (res > 0 && *number + 1 == 1ULL << (7 * res))
679  *number = 0xffffffffffffffULL;
680  return res;
681 }
682 
683 /*
684  * Read the next element as an unsigned int.
685  * 0 is success, < 0 is failure.
686  */
687 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
688 {
689  int n = 0;
690 
691  if (size > 8)
692  return AVERROR_INVALIDDATA;
693 
694  /* big-endian ordering; build up number */
695  *num = 0;
696  while (n++ < size)
697  *num = (*num << 8) | avio_r8(pb);
698 
699  return 0;
700 }
701 
702 /*
703  * Read the next element as a float.
704  * 0 is success, < 0 is failure.
705  */
706 static int ebml_read_float(AVIOContext *pb, int size, double *num)
707 {
708  if (size == 0)
709  *num = 0;
710  else if (size == 4)
711  *num = av_int2float(avio_rb32(pb));
712  else if (size == 8)
713  *num = av_int2double(avio_rb64(pb));
714  else
715  return AVERROR_INVALIDDATA;
716 
717  return 0;
718 }
719 
720 /*
721  * Read the next element as an ASCII string.
722  * 0 is success, < 0 is failure.
723  */
724 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
725 {
726  char *res;
727 
728  /* EBML strings are usually not 0-terminated, so we allocate one
729  * byte more, read the string and NULL-terminate it ourselves. */
730  if (!(res = av_malloc(size + 1)))
731  return AVERROR(ENOMEM);
732  if (avio_read(pb, (uint8_t *) res, size) != size) {
733  av_free(res);
734  return AVERROR(EIO);
735  }
736  (res)[size] = '\0';
737  av_free(*str);
738  *str = res;
739 
740  return 0;
741 }
742 
743 /*
744  * Read the next element as binary data.
745  * 0 is success, < 0 is failure.
746  */
747 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
748 {
749  av_free(bin->data);
750  bin->size = 0;
751 
752  if (!(bin->data = av_mallocz(length + FF_INPUT_BUFFER_PADDING_SIZE)))
753  return AVERROR(ENOMEM);
754 
755  bin->pos = avio_tell(pb);
756  if (avio_read(pb, bin->data, length) != length) {
757  av_freep(&bin->data);
758  return AVERROR(EIO);
759  }
760 
761  bin->size = length;
762 
763  return 0;
764 }
765 
766 /*
767  * Read the next element, but only the header. The contents
768  * are supposed to be sub-elements which can be read separately.
769  * 0 is success, < 0 is failure.
770  */
771 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
772 {
773  AVIOContext *pb = matroska->ctx->pb;
775 
776  if (matroska->num_levels >= EBML_MAX_DEPTH) {
777  av_log(matroska->ctx, AV_LOG_ERROR,
778  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
779  return AVERROR(ENOSYS);
780  }
781 
782  level = &matroska->levels[matroska->num_levels++];
783  level->start = avio_tell(pb);
784  level->length = length;
785 
786  return 0;
787 }
788 
789 /*
790  * Read signed/unsigned "EBML" numbers.
791  * Return: number of bytes processed, < 0 on error
792  */
794  uint8_t *data, uint32_t size, uint64_t *num)
795 {
796  AVIOContext pb;
797  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
798  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
799 }
800 
801 /*
802  * Same as above, but signed.
803  */
805  uint8_t *data, uint32_t size, int64_t *num)
806 {
807  uint64_t unum;
808  int res;
809 
810  /* read as unsigned number first */
811  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
812  return res;
813 
814  /* make signed (weird way) */
815  *num = unum - ((1LL << (7 * res - 1)) - 1);
816 
817  return res;
818 }
819 
820 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
821  EbmlSyntax *syntax, void *data);
822 
823 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
824  uint32_t id, void *data)
825 {
826  int i;
827  for (i = 0; syntax[i].id; i++)
828  if (id == syntax[i].id)
829  break;
830  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
831  matroska->num_levels > 0 &&
832  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
833  return 0; // we reached the end of an unknown size cluster
834  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
835  av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%"PRIX32"\n", id);
836  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
837  return AVERROR_INVALIDDATA;
838  }
839  return ebml_parse_elem(matroska, &syntax[i], data);
840 }
841 
842 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
843  void *data)
844 {
845  if (!matroska->current_id) {
846  uint64_t id;
847  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
848  if (res < 0)
849  return res;
850  matroska->current_id = id | 1 << 7 * res;
851  }
852  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
853 }
854 
855 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
856  void *data)
857 {
858  int i, res = 0;
859 
860  for (i = 0; syntax[i].id; i++)
861  switch (syntax[i].type) {
862  case EBML_UINT:
863  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
864  break;
865  case EBML_FLOAT:
866  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
867  break;
868  case EBML_STR:
869  case EBML_UTF8:
870  // the default may be NULL
871  if (syntax[i].def.s) {
872  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
873  *dst = av_strdup(syntax[i].def.s);
874  if (!*dst)
875  return AVERROR(ENOMEM);
876  }
877  break;
878  }
879 
880  while (!res && !ebml_level_end(matroska))
881  res = ebml_parse(matroska, syntax, data);
882 
883  return res;
884 }
885 
887  EbmlSyntax *syntax, void *data)
888 {
889  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
890  [EBML_UINT] = 8,
891  [EBML_FLOAT] = 8,
892  // max. 16 MB for strings
893  [EBML_STR] = 0x1000000,
894  [EBML_UTF8] = 0x1000000,
895  // max. 256 MB for binary data
896  [EBML_BIN] = 0x10000000,
897  // no limits for anything else
898  };
899  AVIOContext *pb = matroska->ctx->pb;
900  uint32_t id = syntax->id;
901  uint64_t length;
902  int res;
903 
904  data = (char *) data + syntax->data_offset;
905  if (syntax->list_elem_size) {
906  EbmlList *list = data;
907  if ((res = av_reallocp_array(&list->elem,
908  list->nb_elem + 1,
909  syntax->list_elem_size)) < 0) {
910  list->nb_elem = 0;
911  return res;
912  }
913  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
914  memset(data, 0, syntax->list_elem_size);
915  list->nb_elem++;
916  }
917 
918  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
919  matroska->current_id = 0;
920  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
921  return res;
922  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
923  av_log(matroska->ctx, AV_LOG_ERROR,
924  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
925  length, max_lengths[syntax->type], syntax->type);
926  return AVERROR_INVALIDDATA;
927  }
928  }
929 
930  switch (syntax->type) {
931  case EBML_UINT:
932  res = ebml_read_uint(pb, length, data);
933  break;
934  case EBML_FLOAT:
935  res = ebml_read_float(pb, length, data);
936  break;
937  case EBML_STR:
938  case EBML_UTF8:
939  res = ebml_read_ascii(pb, length, data);
940  break;
941  case EBML_BIN:
942  res = ebml_read_binary(pb, length, data);
943  break;
944  case EBML_NEST:
945  if ((res = ebml_read_master(matroska, length)) < 0)
946  return res;
947  if (id == MATROSKA_ID_SEGMENT)
948  matroska->segment_start = avio_tell(matroska->ctx->pb);
949  return ebml_parse_nest(matroska, syntax->def.n, data);
950  case EBML_PASS:
951  return ebml_parse_id(matroska, syntax->def.n, id, data);
952  case EBML_STOP:
953  return 1;
954  default:
955  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
956  }
957  if (res == AVERROR_INVALIDDATA)
958  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
959  else if (res == AVERROR(EIO))
960  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
961  return res;
962 }
963 
964 static void ebml_free(EbmlSyntax *syntax, void *data)
965 {
966  int i, j;
967  for (i = 0; syntax[i].id; i++) {
968  void *data_off = (char *) data + syntax[i].data_offset;
969  switch (syntax[i].type) {
970  case EBML_STR:
971  case EBML_UTF8:
972  av_freep(data_off);
973  break;
974  case EBML_BIN:
975  av_freep(&((EbmlBin *) data_off)->data);
976  break;
977  case EBML_NEST:
978  if (syntax[i].list_elem_size) {
979  EbmlList *list = data_off;
980  char *ptr = list->elem;
981  for (j = 0; j < list->nb_elem;
982  j++, ptr += syntax[i].list_elem_size)
983  ebml_free(syntax[i].def.n, ptr);
984  av_free(list->elem);
985  } else
986  ebml_free(syntax[i].def.n, data_off);
987  default:
988  break;
989  }
990  }
991 }
992 
993 /*
994  * Autodetecting...
995  */
997 {
998  uint64_t total = 0;
999  int len_mask = 0x80, size = 1, n = 1, i;
1000 
1001  /* EBML header? */
1002  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1003  return 0;
1004 
1005  /* length of header */
1006  total = p->buf[4];
1007  while (size <= 8 && !(total & len_mask)) {
1008  size++;
1009  len_mask >>= 1;
1010  }
1011  if (size > 8)
1012  return 0;
1013  total &= (len_mask - 1);
1014  while (n < size)
1015  total = (total << 8) | p->buf[4 + n++];
1016 
1017  /* Does the probe data contain the whole header? */
1018  if (p->buf_size < 4 + size + total)
1019  return 0;
1020 
1021  /* The header should contain a known document type. For now,
1022  * we don't parse the whole header but simply check for the
1023  * availability of that array of characters inside the header.
1024  * Not fully fool-proof, but good enough. */
1025  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1026  int probelen = strlen(matroska_doctypes[i]);
1027  if (total < probelen)
1028  continue;
1029  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1030  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1031  return AVPROBE_SCORE_MAX;
1032  }
1033 
1034  // probably valid EBML header but no recognized doctype
1035  return AVPROBE_SCORE_EXTENSION;
1036 }
1037 
1039  int num)
1040 {
1041  MatroskaTrack *tracks = matroska->tracks.elem;
1042  int i;
1043 
1044  for (i = 0; i < matroska->tracks.nb_elem; i++)
1045  if (tracks[i].num == num)
1046  return &tracks[i];
1047 
1048  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1049  return NULL;
1050 }
1051 
1052 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1053  MatroskaTrack *track)
1054 {
1055  MatroskaTrackEncoding *encodings = track->encodings.elem;
1056  uint8_t *data = *buf;
1057  int isize = *buf_size;
1058  uint8_t *pkt_data = NULL;
1059  uint8_t av_unused *newpktdata;
1060  int pkt_size = isize;
1061  int result = 0;
1062  int olen;
1063 
1064  if (pkt_size >= 10000000)
1065  return AVERROR_INVALIDDATA;
1066 
1067  switch (encodings[0].compression.algo) {
1069  {
1070  int header_size = encodings[0].compression.settings.size;
1071  uint8_t *header = encodings[0].compression.settings.data;
1072 
1073  if (!header_size)
1074  return 0;
1075 
1076  pkt_size = isize + header_size;
1077  pkt_data = av_malloc(pkt_size);
1078  if (!pkt_data)
1079  return AVERROR(ENOMEM);
1080 
1081  memcpy(pkt_data, header, header_size);
1082  memcpy(pkt_data + header_size, data, isize);
1083  break;
1084  }
1085 #if CONFIG_LZO
1087  do {
1088  olen = pkt_size *= 3;
1089  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1090  if (!newpktdata) {
1091  result = AVERROR(ENOMEM);
1092  goto failed;
1093  }
1094  pkt_data = newpktdata;
1095  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1096  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1097  if (result) {
1098  result = AVERROR_INVALIDDATA;
1099  goto failed;
1100  }
1101  pkt_size -= olen;
1102  break;
1103 #endif
1104 #if CONFIG_ZLIB
1106  {
1107  z_stream zstream = { 0 };
1108  if (inflateInit(&zstream) != Z_OK)
1109  return -1;
1110  zstream.next_in = data;
1111  zstream.avail_in = isize;
1112  do {
1113  pkt_size *= 3;
1114  newpktdata = av_realloc(pkt_data, pkt_size);
1115  if (!newpktdata) {
1116  inflateEnd(&zstream);
1117  goto failed;
1118  }
1119  pkt_data = newpktdata;
1120  zstream.avail_out = pkt_size - zstream.total_out;
1121  zstream.next_out = pkt_data + zstream.total_out;
1122  result = inflate(&zstream, Z_NO_FLUSH);
1123  } while (result == Z_OK && pkt_size < 10000000);
1124  pkt_size = zstream.total_out;
1125  inflateEnd(&zstream);
1126  if (result != Z_STREAM_END) {
1127  if (result == Z_MEM_ERROR)
1128  result = AVERROR(ENOMEM);
1129  else
1130  result = AVERROR_INVALIDDATA;
1131  goto failed;
1132  }
1133  break;
1134  }
1135 #endif
1136 #if CONFIG_BZLIB
1138  {
1139  bz_stream bzstream = { 0 };
1140  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1141  return -1;
1142  bzstream.next_in = data;
1143  bzstream.avail_in = isize;
1144  do {
1145  pkt_size *= 3;
1146  newpktdata = av_realloc(pkt_data, pkt_size);
1147  if (!newpktdata) {
1148  BZ2_bzDecompressEnd(&bzstream);
1149  goto failed;
1150  }
1151  pkt_data = newpktdata;
1152  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1153  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1154  result = BZ2_bzDecompress(&bzstream);
1155  } while (result == BZ_OK && pkt_size < 10000000);
1156  pkt_size = bzstream.total_out_lo32;
1157  BZ2_bzDecompressEnd(&bzstream);
1158  if (result != BZ_STREAM_END) {
1159  if (result == BZ_MEM_ERROR)
1160  result = AVERROR(ENOMEM);
1161  else
1162  result = AVERROR_INVALIDDATA;
1163  goto failed;
1164  }
1165  break;
1166  }
1167 #endif
1168  default:
1169  return AVERROR_INVALIDDATA;
1170  }
1171 
1172  *buf = pkt_data;
1173  *buf_size = pkt_size;
1174  return 0;
1175 
1176 failed:
1177  av_free(pkt_data);
1178  return result;
1179 }
1180 
1182  AVPacket *pkt, uint64_t display_duration)
1183 {
1184  AVBufferRef *line;
1185  char *layer, *ptr = pkt->data, *end = ptr + pkt->size;
1186 
1187  for (; *ptr != ',' && ptr < end - 1; ptr++)
1188  ;
1189  if (*ptr == ',')
1190  layer = ++ptr;
1191  for (; *ptr != ',' && ptr < end - 1; ptr++)
1192  ;
1193  if (*ptr == ',') {
1194  int64_t end_pts = pkt->pts + display_duration;
1195  int sc = matroska->time_scale * pkt->pts / 10000000;
1196  int ec = matroska->time_scale * end_pts / 10000000;
1197  int sh, sm, ss, eh, em, es, len;
1198  sh = sc / 360000;
1199  sc -= 360000 * sh;
1200  sm = sc / 6000;
1201  sc -= 6000 * sm;
1202  ss = sc / 100;
1203  sc -= 100 * ss;
1204  eh = ec / 360000;
1205  ec -= 360000 * eh;
1206  em = ec / 6000;
1207  ec -= 6000 * em;
1208  es = ec / 100;
1209  ec -= 100 * es;
1210  *ptr++ = '\0';
1211  len = 50 + end - ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1212  if (!(line = av_buffer_alloc(len)))
1213  return;
1214  snprintf(line->data, len,
1215  "Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1216  layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1217  av_buffer_unref(&pkt->buf);
1218  pkt->buf = line;
1219  pkt->data = line->data;
1220  pkt->size = strlen(line->data);
1221  }
1222 }
1223 
1225 {
1226  int old_size = out->size;
1227  int ret = av_grow_packet(out, in->size);
1228  if (ret < 0)
1229  return ret;
1230 
1231  memcpy(out->data + old_size, in->data, in->size);
1232 
1233  av_free_packet(in);
1234  av_free(in);
1235  return 0;
1236 }
1237 
1239  AVDictionary **metadata, char *prefix)
1240 {
1241  MatroskaTag *tags = list->elem;
1242  char key[1024];
1243  int i;
1244 
1245  for (i = 0; i < list->nb_elem; i++) {
1246  const char *lang = tags[i].lang &&
1247  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1248 
1249  if (!tags[i].name) {
1250  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1251  continue;
1252  }
1253  if (prefix)
1254  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1255  else
1256  av_strlcpy(key, tags[i].name, sizeof(key));
1257  if (tags[i].def || !lang) {
1258  av_dict_set(metadata, key, tags[i].string, 0);
1259  if (tags[i].sub.nb_elem)
1260  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1261  }
1262  if (lang) {
1263  av_strlcat(key, "-", sizeof(key));
1264  av_strlcat(key, lang, sizeof(key));
1265  av_dict_set(metadata, key, tags[i].string, 0);
1266  if (tags[i].sub.nb_elem)
1267  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1268  }
1269  }
1271 }
1272 
1274 {
1275  MatroskaDemuxContext *matroska = s->priv_data;
1276  MatroskaTags *tags = matroska->tags.elem;
1277  int i, j;
1278 
1279  for (i = 0; i < matroska->tags.nb_elem; i++) {
1280  if (tags[i].target.attachuid) {
1281  MatroskaAttachment *attachment = matroska->attachments.elem;
1282  for (j = 0; j < matroska->attachments.nb_elem; j++)
1283  if (attachment[j].uid == tags[i].target.attachuid &&
1284  attachment[j].stream)
1285  matroska_convert_tag(s, &tags[i].tag,
1286  &attachment[j].stream->metadata, NULL);
1287  } else if (tags[i].target.chapteruid) {
1288  MatroskaChapter *chapter = matroska->chapters.elem;
1289  for (j = 0; j < matroska->chapters.nb_elem; j++)
1290  if (chapter[j].uid == tags[i].target.chapteruid &&
1291  chapter[j].chapter)
1292  matroska_convert_tag(s, &tags[i].tag,
1293  &chapter[j].chapter->metadata, NULL);
1294  } else if (tags[i].target.trackuid) {
1295  MatroskaTrack *track = matroska->tracks.elem;
1296  for (j = 0; j < matroska->tracks.nb_elem; j++)
1297  if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1298  matroska_convert_tag(s, &tags[i].tag,
1299  &track[j].stream->metadata, NULL);
1300  } else {
1301  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1302  tags[i].target.type);
1303  }
1304  }
1305 }
1306 
1308  int idx)
1309 {
1310  EbmlList *seekhead_list = &matroska->seekhead;
1311  uint32_t level_up = matroska->level_up;
1312  uint32_t saved_id = matroska->current_id;
1313  MatroskaSeekhead *seekhead = seekhead_list->elem;
1314  int64_t before_pos = avio_tell(matroska->ctx->pb);
1316  int64_t offset;
1317  int ret = 0;
1318 
1319  if (idx >= seekhead_list->nb_elem ||
1320  seekhead[idx].id == MATROSKA_ID_SEEKHEAD ||
1321  seekhead[idx].id == MATROSKA_ID_CLUSTER)
1322  return 0;
1323 
1324  /* seek */
1325  offset = seekhead[idx].pos + matroska->segment_start;
1326  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1327  /* We don't want to lose our seekhead level, so we add
1328  * a dummy. This is a crude hack. */
1329  if (matroska->num_levels == EBML_MAX_DEPTH) {
1330  av_log(matroska->ctx, AV_LOG_INFO,
1331  "Max EBML element depth (%d) reached, "
1332  "cannot parse further.\n", EBML_MAX_DEPTH);
1333  ret = AVERROR_INVALIDDATA;
1334  } else {
1335  level.start = 0;
1336  level.length = (uint64_t) -1;
1337  matroska->levels[matroska->num_levels] = level;
1338  matroska->num_levels++;
1339  matroska->current_id = 0;
1340 
1341  ret = ebml_parse(matroska, matroska_segment, matroska);
1342 
1343  /* remove dummy level */
1344  while (matroska->num_levels) {
1345  uint64_t length = matroska->levels[--matroska->num_levels].length;
1346  if (length == (uint64_t) -1)
1347  break;
1348  }
1349  }
1350  }
1351  /* seek back */
1352  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1353  matroska->level_up = level_up;
1354  matroska->current_id = saved_id;
1355 
1356  return ret;
1357 }
1358 
1360 {
1361  EbmlList *seekhead_list = &matroska->seekhead;
1362  int64_t before_pos = avio_tell(matroska->ctx->pb);
1363  int i;
1364 
1365  // we should not do any seeking in the streaming case
1366  if (!matroska->ctx->pb->seekable ||
1367  (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1368  return;
1369 
1370  for (i = 0; i < seekhead_list->nb_elem; i++) {
1371  MatroskaSeekhead *seekhead = seekhead_list->elem;
1372  if (seekhead[i].pos <= before_pos)
1373  continue;
1374 
1375  // defer cues parsing until we actually need cue data.
1376  if (seekhead[i].id == MATROSKA_ID_CUES) {
1377  matroska->cues_parsing_deferred = 1;
1378  continue;
1379  }
1380 
1381  if (matroska_parse_seekhead_entry(matroska, i) < 0)
1382  break;
1383  }
1384 }
1385 
1387 {
1388  EbmlList *seekhead_list = &matroska->seekhead;
1389  MatroskaSeekhead *seekhead = seekhead_list->elem;
1390  EbmlList *index_list;
1392  int index_scale = 1;
1393  int i, j;
1394 
1395  for (i = 0; i < seekhead_list->nb_elem; i++)
1396  if (seekhead[i].id == MATROSKA_ID_CUES)
1397  break;
1398  assert(i <= seekhead_list->nb_elem);
1399 
1400  matroska_parse_seekhead_entry(matroska, i);
1401 
1402  index_list = &matroska->index;
1403  index = index_list->elem;
1404  if (index_list->nb_elem &&
1405  index[0].time > 1E14 / matroska->time_scale) {
1406  av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1407  index_scale = matroska->time_scale;
1408  }
1409  for (i = 0; i < index_list->nb_elem; i++) {
1410  EbmlList *pos_list = &index[i].pos;
1411  MatroskaIndexPos *pos = pos_list->elem;
1412  for (j = 0; j < pos_list->nb_elem; j++) {
1413  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1414  pos[j].track);
1415  if (track && track->stream)
1416  av_add_index_entry(track->stream,
1417  pos[j].pos + matroska->segment_start,
1418  index[i].time / index_scale, 0, 0,
1420  }
1421  }
1422 }
1423 
1425 {
1426  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1427  int profile;
1428 
1429  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1430  if (strstr(codec_id, aac_profiles[profile]))
1431  break;
1432  return profile + 1;
1433 }
1434 
1435 static int matroska_aac_sri(int samplerate)
1436 {
1437  int sri;
1438 
1439  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1440  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1441  break;
1442  return sri;
1443 }
1444 
1446  MatroskaTrack *track,
1447  int *offset)
1448 {
1449  AVStream *st = track->stream;
1450  uint8_t *p = track->codec_priv.data;
1451  int size = track->codec_priv.size;
1452 
1453  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1454  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1455  track->codec_priv.size = 0;
1456  return 0;
1457  }
1458  *offset = 8;
1459  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1460 
1461  p += track->codec_priv.size;
1462  size -= track->codec_priv.size;
1463 
1464  /* parse the remaining metadata blocks if present */
1465  while (size >= 4) {
1466  int block_last, block_type, block_size;
1467 
1468  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1469 
1470  p += 4;
1471  size -= 4;
1472  if (block_size > size)
1473  return 0;
1474 
1475  /* check for the channel mask */
1476  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1477  AVDictionary *dict = NULL;
1478  AVDictionaryEntry *chmask;
1479 
1480  ff_vorbis_comment(s, &dict, p, block_size, 0);
1481  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1482  if (chmask) {
1483  uint64_t mask = strtol(chmask->value, NULL, 0);
1484  if (!mask || mask & ~0x3ffffULL) {
1486  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1487  } else
1488  st->codec->channel_layout = mask;
1489  }
1490  av_dict_free(&dict);
1491  }
1492 
1493  p += block_size;
1494  size -= block_size;
1495  }
1496 
1497  return 0;
1498 }
1499 
1501 {
1502  MatroskaDemuxContext *matroska = s->priv_data;
1503  MatroskaTrack *tracks = matroska->tracks.elem;
1504  AVStream *st;
1505  int i, j, ret;
1506 
1507  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1508  MatroskaTrack *track = &tracks[i];
1510  EbmlList *encodings_list = &track->encodings;
1511  MatroskaTrackEncoding *encodings = encodings_list->elem;
1512  uint8_t *extradata = NULL;
1513  int extradata_size = 0;
1514  int extradata_offset = 0;
1515  AVIOContext b;
1516 
1517  /* Apply some sanity checks. */
1518  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1519  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1520  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1521  av_log(matroska->ctx, AV_LOG_INFO,
1522  "Unknown or unsupported track type %"PRIu64"\n",
1523  track->type);
1524  continue;
1525  }
1526  if (!track->codec_id)
1527  continue;
1528 
1529  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1530  if (!track->default_duration && track->video.frame_rate > 0)
1531  track->default_duration = 1000000000 / track->video.frame_rate;
1532  if (!track->video.display_width)
1533  track->video.display_width = track->video.pixel_width;
1534  if (!track->video.display_height)
1535  track->video.display_height = track->video.pixel_height;
1536  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1537  if (!track->audio.out_samplerate)
1538  track->audio.out_samplerate = track->audio.samplerate;
1539  }
1540  if (encodings_list->nb_elem > 1) {
1541  av_log(matroska->ctx, AV_LOG_ERROR,
1542  "Multiple combined encodings not supported");
1543  } else if (encodings_list->nb_elem == 1) {
1544  if (encodings[0].type ||
1545  (
1546 #if CONFIG_ZLIB
1547  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1548 #endif
1549 #if CONFIG_BZLIB
1551 #endif
1552 #if CONFIG_LZO
1554 #endif
1556  encodings[0].scope = 0;
1557  av_log(matroska->ctx, AV_LOG_ERROR,
1558  "Unsupported encoding type");
1559  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1560  uint8_t *codec_priv = track->codec_priv.data;
1561  int ret = matroska_decode_buffer(&track->codec_priv.data,
1562  &track->codec_priv.size,
1563  track);
1564  if (ret < 0) {
1565  track->codec_priv.data = NULL;
1566  track->codec_priv.size = 0;
1567  av_log(matroska->ctx, AV_LOG_ERROR,
1568  "Failed to decode codec private data\n");
1569  }
1570 
1571  if (codec_priv != track->codec_priv.data)
1572  av_free(codec_priv);
1573  }
1574  }
1575 
1576  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1577  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1578  strlen(ff_mkv_codec_tags[j].str))) {
1579  codec_id = ff_mkv_codec_tags[j].id;
1580  break;
1581  }
1582  }
1583 
1584  st = track->stream = avformat_new_stream(s, NULL);
1585  if (!st)
1586  return AVERROR(ENOMEM);
1587 
1588  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1589  track->codec_priv.size >= 40 &&
1590  track->codec_priv.data) {
1591  track->ms_compat = 1;
1592  track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1594  track->video.fourcc);
1595  extradata_offset = 40;
1596  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1597  track->codec_priv.size >= 14 &&
1598  track->codec_priv.data) {
1599  int ret;
1600  ffio_init_context(&b, track->codec_priv.data,
1601  track->codec_priv.size,
1602  0, NULL, NULL, NULL, NULL);
1603  ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1604  if (ret < 0)
1605  return ret;
1606  codec_id = st->codec->codec_id;
1607  extradata_offset = FFMIN(track->codec_priv.size, 18);
1608  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1609  (track->codec_priv.size >= 86) &&
1610  (track->codec_priv.data)) {
1611  if (track->codec_priv.size == AV_RB32(track->codec_priv.data)) {
1612  track->video.fourcc = AV_RL32(track->codec_priv.data + 4);
1614  track->video.fourcc);
1615  }
1616  if (codec_id == AV_CODEC_ID_NONE) {
1617  track->video.fourcc = AV_RL32(track->codec_priv.data);
1619  track->video.fourcc);
1620  }
1621  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1622  switch (track->audio.bitdepth) {
1623  case 8:
1624  codec_id = AV_CODEC_ID_PCM_U8;
1625  break;
1626  case 24:
1627  codec_id = AV_CODEC_ID_PCM_S24BE;
1628  break;
1629  case 32:
1630  codec_id = AV_CODEC_ID_PCM_S32BE;
1631  break;
1632  }
1633  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1634  switch (track->audio.bitdepth) {
1635  case 8:
1636  codec_id = AV_CODEC_ID_PCM_U8;
1637  break;
1638  case 24:
1639  codec_id = AV_CODEC_ID_PCM_S24LE;
1640  break;
1641  case 32:
1642  codec_id = AV_CODEC_ID_PCM_S32LE;
1643  break;
1644  }
1645  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1646  track->audio.bitdepth == 64) {
1647  codec_id = AV_CODEC_ID_PCM_F64LE;
1648  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1649  int profile = matroska_aac_profile(track->codec_id);
1650  int sri = matroska_aac_sri(track->audio.samplerate);
1651  extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1652  if (!extradata)
1653  return AVERROR(ENOMEM);
1654  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1655  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1656  if (strstr(track->codec_id, "SBR")) {
1657  sri = matroska_aac_sri(track->audio.out_samplerate);
1658  extradata[2] = 0x56;
1659  extradata[3] = 0xE5;
1660  extradata[4] = 0x80 | (sri << 3);
1661  extradata_size = 5;
1662  } else
1663  extradata_size = 2;
1664  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1665  /* Only ALAC's magic cookie is stored in Matroska's track headers.
1666  * Create the "atom size", "tag", and "tag version" fields the
1667  * decoder expects manually. */
1668  extradata_size = 12 + track->codec_priv.size;
1669  extradata = av_mallocz(extradata_size +
1671  if (!extradata)
1672  return AVERROR(ENOMEM);
1673  AV_WB32(extradata, extradata_size);
1674  memcpy(&extradata[4], "alac", 4);
1675  AV_WB32(&extradata[8], 0);
1676  memcpy(&extradata[12], track->codec_priv.data,
1677  track->codec_priv.size);
1678  } else if (codec_id == AV_CODEC_ID_TTA) {
1679  extradata_size = 30;
1680  extradata = av_mallocz(extradata_size);
1681  if (!extradata)
1682  return AVERROR(ENOMEM);
1683  ffio_init_context(&b, extradata, extradata_size, 1,
1684  NULL, NULL, NULL, NULL);
1685  avio_write(&b, "TTA1", 4);
1686  avio_wl16(&b, 1);
1687  avio_wl16(&b, track->audio.channels);
1688  avio_wl16(&b, track->audio.bitdepth);
1689  avio_wl32(&b, track->audio.out_samplerate);
1690  avio_wl32(&b, matroska->ctx->duration *
1691  track->audio.out_samplerate);
1692  } else if (codec_id == AV_CODEC_ID_RV10 ||
1693  codec_id == AV_CODEC_ID_RV20 ||
1694  codec_id == AV_CODEC_ID_RV30 ||
1695  codec_id == AV_CODEC_ID_RV40) {
1696  extradata_offset = 26;
1697  } else if (codec_id == AV_CODEC_ID_RA_144) {
1698  track->audio.out_samplerate = 8000;
1699  track->audio.channels = 1;
1700  } else if (codec_id == AV_CODEC_ID_RA_288 ||
1701  codec_id == AV_CODEC_ID_COOK ||
1702  codec_id == AV_CODEC_ID_ATRAC3 ||
1703  codec_id == AV_CODEC_ID_SIPR) {
1704  int flavor;
1705  ffio_init_context(&b, track->codec_priv.data,
1706  track->codec_priv.size,
1707  0, NULL, NULL, NULL, NULL);
1708  avio_skip(&b, 22);
1709  flavor = avio_rb16(&b);
1710  track->audio.coded_framesize = avio_rb32(&b);
1711  avio_skip(&b, 12);
1712  track->audio.sub_packet_h = avio_rb16(&b);
1713  track->audio.frame_size = avio_rb16(&b);
1714  track->audio.sub_packet_size = avio_rb16(&b);
1715  if (flavor <= 0 ||
1716  track->audio.coded_framesize <= 0 ||
1717  track->audio.sub_packet_h <= 0 ||
1718  track->audio.frame_size <= 0 ||
1719  track->audio.sub_packet_size <= 0)
1720  return AVERROR_INVALIDDATA;
1721  track->audio.buf = av_malloc(track->audio.frame_size *
1722  track->audio.sub_packet_h);
1723  if (codec_id == AV_CODEC_ID_RA_288) {
1724  st->codec->block_align = track->audio.coded_framesize;
1725  track->codec_priv.size = 0;
1726  } else {
1727  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1728  const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1729  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1730  st->codec->bit_rate = sipr_bit_rate[flavor];
1731  }
1732  st->codec->block_align = track->audio.sub_packet_size;
1733  extradata_offset = 78;
1734  }
1735  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1736  ret = matroska_parse_flac(s, track, &extradata_offset);
1737  if (ret < 0)
1738  return ret;
1739  }
1740  track->codec_priv.size -= extradata_offset;
1741 
1742  if (codec_id == AV_CODEC_ID_NONE)
1743  av_log(matroska->ctx, AV_LOG_INFO,
1744  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1745 
1746  if (track->time_scale < 0.01)
1747  track->time_scale = 1.0;
1748  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1749  1000 * 1000 * 1000); /* 64 bit pts in ns */
1750 
1751  /* convert the delay from ns to the track timebase */
1752  track->codec_delay = av_rescale_q(track->codec_delay,
1753  (AVRational){ 1, 1000000000 },
1754  st->time_base);
1755 
1756  st->codec->codec_id = codec_id;
1757  st->start_time = 0;
1758  if (strcmp(track->language, "und"))
1759  av_dict_set(&st->metadata, "language", track->language, 0);
1760  av_dict_set(&st->metadata, "title", track->name, 0);
1761 
1762  if (track->flag_default)
1764  if (track->flag_forced)
1766 
1767  if (!st->codec->extradata) {
1768  if (extradata) {
1769  st->codec->extradata = extradata;
1770  st->codec->extradata_size = extradata_size;
1771  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1772  st->codec->extradata = av_mallocz(track->codec_priv.size +
1774  if (!st->codec->extradata)
1775  return AVERROR(ENOMEM);
1776  st->codec->extradata_size = track->codec_priv.size;
1777  memcpy(st->codec->extradata,
1778  track->codec_priv.data + extradata_offset,
1779  track->codec_priv.size);
1780  }
1781  }
1782 
1783  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1785  st->codec->codec_tag = track->video.fourcc;
1786  st->codec->width = track->video.pixel_width;
1787  st->codec->height = track->video.pixel_height;
1789  &st->sample_aspect_ratio.den,
1790  st->codec->height * track->video.display_width,
1791  st->codec->width * track->video.display_height,
1792  255);
1793  if (st->codec->codec_id != AV_CODEC_ID_H264 &&
1796  if (track->default_duration) {
1798  1000000000, track->default_duration, 30000);
1799  }
1800  // add stream level stereo3d side data if it is a supported format
1802  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
1803  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
1804  if (ret < 0)
1805  return ret;
1806  }
1807  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1809  st->codec->sample_rate = track->audio.out_samplerate;
1810  st->codec->channels = track->audio.channels;
1811  if (st->codec->codec_id != AV_CODEC_ID_AAC)
1813  if (st->codec->codec_id == AV_CODEC_ID_MP3)
1815  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1817  if (st->codec->codec_id == AV_CODEC_ID_SSA)
1818  matroska->contains_ssa = 1;
1819  }
1820  }
1821 
1822  return 0;
1823 }
1824 
1826 {
1827  MatroskaDemuxContext *matroska = s->priv_data;
1828  EbmlList *attachments_list = &matroska->attachments;
1829  EbmlList *chapters_list = &matroska->chapters;
1830  MatroskaAttachment *attachments;
1831  MatroskaChapter *chapters;
1832  uint64_t max_start = 0;
1833  int64_t pos;
1834  Ebml ebml = { 0 };
1835  int i, j, res;
1836 
1837  matroska->ctx = s;
1838 
1839  /* First read the EBML header. */
1840  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
1841  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
1842  ebml_free(ebml_syntax, &ebml);
1843  return AVERROR_INVALIDDATA;
1844  }
1845  if (ebml.version > EBML_VERSION ||
1846  ebml.max_size > sizeof(uint64_t) ||
1847  ebml.id_length > sizeof(uint32_t) ||
1848  ebml.doctype_version > 3) {
1849  av_log(matroska->ctx, AV_LOG_ERROR,
1850  "EBML header using unsupported features\n"
1851  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1852  ebml.version, ebml.doctype, ebml.doctype_version);
1853  ebml_free(ebml_syntax, &ebml);
1854  return AVERROR_PATCHWELCOME;
1855  }
1856  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1857  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1858  break;
1859  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1860  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1861  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1862  ebml_free(ebml_syntax, &ebml);
1863  return AVERROR_INVALIDDATA;
1864  }
1865  }
1866  ebml_free(ebml_syntax, &ebml);
1867 
1868  /* The next thing is a segment. */
1869  pos = avio_tell(matroska->ctx->pb);
1870  res = ebml_parse(matroska, matroska_segments, matroska);
1871  // try resyncing until we find a EBML_STOP type element.
1872  while (res != 1) {
1873  res = matroska_resync(matroska, pos);
1874  if (res < 0)
1875  return res;
1876  pos = avio_tell(matroska->ctx->pb);
1877  res = ebml_parse(matroska, matroska_segment, matroska);
1878  }
1879  matroska_execute_seekhead(matroska);
1880 
1881  if (!matroska->time_scale)
1882  matroska->time_scale = 1000000;
1883  if (matroska->duration)
1884  matroska->ctx->duration = matroska->duration * matroska->time_scale *
1885  1000 / AV_TIME_BASE;
1886  av_dict_set(&s->metadata, "title", matroska->title, 0);
1887 
1888  res = matroska_parse_tracks(s);
1889  if (res < 0)
1890  return res;
1891 
1892  attachments = attachments_list->elem;
1893  for (j = 0; j < attachments_list->nb_elem; j++) {
1894  if (!(attachments[j].filename && attachments[j].mime &&
1895  attachments[j].bin.data && attachments[j].bin.size > 0)) {
1896  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1897  } else {
1898  AVStream *st = avformat_new_stream(s, NULL);
1899  if (!st)
1900  break;
1901  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
1902  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
1905  st->codec->extradata = av_malloc(attachments[j].bin.size);
1906  if (!st->codec->extradata)
1907  break;
1908  st->codec->extradata_size = attachments[j].bin.size;
1909  memcpy(st->codec->extradata, attachments[j].bin.data,
1910  attachments[j].bin.size);
1911 
1912  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1913  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
1914  strlen(ff_mkv_mime_tags[i].str))) {
1915  st->codec->codec_id = ff_mkv_mime_tags[i].id;
1916  break;
1917  }
1918  }
1919  attachments[j].stream = st;
1920  }
1921  }
1922 
1923  chapters = chapters_list->elem;
1924  for (i = 0; i < chapters_list->nb_elem; i++)
1925  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
1926  (max_start == 0 || chapters[i].start > max_start)) {
1927  chapters[i].chapter =
1928  avpriv_new_chapter(s, chapters[i].uid,
1929  (AVRational) { 1, 1000000000 },
1930  chapters[i].start, chapters[i].end,
1931  chapters[i].title);
1932  av_dict_set(&chapters[i].chapter->metadata,
1933  "title", chapters[i].title, 0);
1934  max_start = chapters[i].start;
1935  }
1936 
1938 
1939  return 0;
1940 }
1941 
1942 /*
1943  * Put one packet in an application-supplied AVPacket struct.
1944  * Returns 0 on success or -1 on failure.
1945  */
1947  AVPacket *pkt)
1948 {
1949  if (matroska->num_packets > 0) {
1950  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1951  av_free(matroska->packets[0]);
1952  if (matroska->num_packets > 1) {
1953  void *newpackets;
1954  memmove(&matroska->packets[0], &matroska->packets[1],
1955  (matroska->num_packets - 1) * sizeof(AVPacket *));
1956  newpackets = av_realloc(matroska->packets,
1957  (matroska->num_packets - 1) *
1958  sizeof(AVPacket *));
1959  if (newpackets)
1960  matroska->packets = newpackets;
1961  } else {
1962  av_freep(&matroska->packets);
1963  matroska->prev_pkt = NULL;
1964  }
1965  matroska->num_packets--;
1966  return 0;
1967  }
1968 
1969  return -1;
1970 }
1971 
1972 /*
1973  * Free all packets in our internal queue.
1974  */
1976 {
1977  matroska->prev_pkt = NULL;
1978  if (matroska->packets) {
1979  int n;
1980  for (n = 0; n < matroska->num_packets; n++) {
1981  av_free_packet(matroska->packets[n]);
1982  av_free(matroska->packets[n]);
1983  }
1984  av_freep(&matroska->packets);
1985  matroska->num_packets = 0;
1986  }
1987 }
1988 
1990  int *buf_size, int type,
1991  uint32_t **lace_buf, int *laces)
1992 {
1993  int res = 0, n, size = *buf_size;
1994  uint8_t *data = *buf;
1995  uint32_t *lace_size;
1996 
1997  if (!type) {
1998  *laces = 1;
1999  *lace_buf = av_mallocz(sizeof(int));
2000  if (!*lace_buf)
2001  return AVERROR(ENOMEM);
2002 
2003  *lace_buf[0] = size;
2004  return 0;
2005  }
2006 
2007  assert(size > 0);
2008  *laces = *data + 1;
2009  data += 1;
2010  size -= 1;
2011  lace_size = av_mallocz(*laces * sizeof(int));
2012  if (!lace_size)
2013  return AVERROR(ENOMEM);
2014 
2015  switch (type) {
2016  case 0x1: /* Xiph lacing */
2017  {
2018  uint8_t temp;
2019  uint32_t total = 0;
2020  for (n = 0; res == 0 && n < *laces - 1; n++) {
2021  while (1) {
2022  if (size == 0) {
2023  res = AVERROR_EOF;
2024  break;
2025  }
2026  temp = *data;
2027  lace_size[n] += temp;
2028  data += 1;
2029  size -= 1;
2030  if (temp != 0xff)
2031  break;
2032  }
2033  total += lace_size[n];
2034  }
2035  if (size <= total) {
2036  res = AVERROR_INVALIDDATA;
2037  break;
2038  }
2039 
2040  lace_size[n] = size - total;
2041  break;
2042  }
2043 
2044  case 0x2: /* fixed-size lacing */
2045  if (size % (*laces)) {
2046  res = AVERROR_INVALIDDATA;
2047  break;
2048  }
2049  for (n = 0; n < *laces; n++)
2050  lace_size[n] = size / *laces;
2051  break;
2052 
2053  case 0x3: /* EBML lacing */
2054  {
2055  uint64_t num;
2056  uint64_t total;
2057  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2058  if (n < 0) {
2059  av_log(matroska->ctx, AV_LOG_INFO,
2060  "EBML block data error\n");
2061  res = n;
2062  break;
2063  }
2064  data += n;
2065  size -= n;
2066  total = lace_size[0] = num;
2067  for (n = 1; res == 0 && n < *laces - 1; n++) {
2068  int64_t snum;
2069  int r;
2070  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2071  if (r < 0) {
2072  av_log(matroska->ctx, AV_LOG_INFO,
2073  "EBML block data error\n");
2074  res = r;
2075  break;
2076  }
2077  data += r;
2078  size -= r;
2079  lace_size[n] = lace_size[n - 1] + snum;
2080  total += lace_size[n];
2081  }
2082  if (size <= total) {
2083  res = AVERROR_INVALIDDATA;
2084  break;
2085  }
2086  lace_size[*laces - 1] = size - total;
2087  break;
2088  }
2089  }
2090 
2091  *buf = data;
2092  *lace_buf = lace_size;
2093  *buf_size = size;
2094 
2095  return res;
2096 }
2097 
2099  MatroskaTrack *track, AVStream *st,
2100  uint8_t *data, int size, uint64_t timecode,
2101  uint64_t duration, int64_t pos)
2102 {
2103  int a = st->codec->block_align;
2104  int sps = track->audio.sub_packet_size;
2105  int cfs = track->audio.coded_framesize;
2106  int h = track->audio.sub_packet_h;
2107  int y = track->audio.sub_packet_cnt;
2108  int w = track->audio.frame_size;
2109  int x;
2110 
2111  if (!track->audio.pkt_cnt) {
2112  if (track->audio.sub_packet_cnt == 0)
2113  track->audio.buf_timecode = timecode;
2114  if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2115  if (size < cfs * h / 2) {
2116  av_log(matroska->ctx, AV_LOG_ERROR,
2117  "Corrupt int4 RM-style audio packet size\n");
2118  return AVERROR_INVALIDDATA;
2119  }
2120  for (x = 0; x < h / 2; x++)
2121  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2122  data + x * cfs, cfs);
2123  } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2124  if (size < w) {
2125  av_log(matroska->ctx, AV_LOG_ERROR,
2126  "Corrupt sipr RM-style audio packet size\n");
2127  return AVERROR_INVALIDDATA;
2128  }
2129  memcpy(track->audio.buf + y * w, data, w);
2130  } else {
2131  if (size < sps * w / sps) {
2132  av_log(matroska->ctx, AV_LOG_ERROR,
2133  "Corrupt generic RM-style audio packet size\n");
2134  return AVERROR_INVALIDDATA;
2135  }
2136  for (x = 0; x < w / sps; x++)
2137  memcpy(track->audio.buf +
2138  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2139  data + x * sps, sps);
2140  }
2141 
2142  if (++track->audio.sub_packet_cnt >= h) {
2143  if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2144  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2145  track->audio.sub_packet_cnt = 0;
2146  track->audio.pkt_cnt = h * w / a;
2147  }
2148  }
2149 
2150  while (track->audio.pkt_cnt) {
2151  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2152  av_new_packet(pkt, a);
2153  memcpy(pkt->data,
2154  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2155  a);
2156  pkt->pts = track->audio.buf_timecode;
2158  pkt->pos = pos;
2159  pkt->stream_index = st->index;
2160  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2161  }
2162 
2163  return 0;
2164 }
2165 
2166 /* reconstruct full wavpack blocks from mangled matroska ones */
2168  uint8_t **pdst, int *size)
2169 {
2170  uint8_t *dst = NULL;
2171  int dstlen = 0;
2172  int srclen = *size;
2173  uint32_t samples;
2174  uint16_t ver;
2175  int ret, offset = 0;
2176 
2177  if (srclen < 12 || track->stream->codec->extradata_size < 2)
2178  return AVERROR_INVALIDDATA;
2179 
2180  ver = AV_RL16(track->stream->codec->extradata);
2181 
2182  samples = AV_RL32(src);
2183  src += 4;
2184  srclen -= 4;
2185 
2186  while (srclen >= 8) {
2187  int multiblock;
2188  uint32_t blocksize;
2189  uint8_t *tmp;
2190 
2191  uint32_t flags = AV_RL32(src);
2192  uint32_t crc = AV_RL32(src + 4);
2193  src += 8;
2194  srclen -= 8;
2195 
2196  multiblock = (flags & 0x1800) != 0x1800;
2197  if (multiblock) {
2198  if (srclen < 4) {
2199  ret = AVERROR_INVALIDDATA;
2200  goto fail;
2201  }
2202  blocksize = AV_RL32(src);
2203  src += 4;
2204  srclen -= 4;
2205  } else
2206  blocksize = srclen;
2207 
2208  if (blocksize > srclen) {
2209  ret = AVERROR_INVALIDDATA;
2210  goto fail;
2211  }
2212 
2213  tmp = av_realloc(dst, dstlen + blocksize + 32);
2214  if (!tmp) {
2215  ret = AVERROR(ENOMEM);
2216  goto fail;
2217  }
2218  dst = tmp;
2219  dstlen += blocksize + 32;
2220 
2221  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2222  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2223  AV_WL16(dst + offset + 8, ver); // version
2224  AV_WL16(dst + offset + 10, 0); // track/index_no
2225  AV_WL32(dst + offset + 12, 0); // total samples
2226  AV_WL32(dst + offset + 16, 0); // block index
2227  AV_WL32(dst + offset + 20, samples); // number of samples
2228  AV_WL32(dst + offset + 24, flags); // flags
2229  AV_WL32(dst + offset + 28, crc); // crc
2230  memcpy(dst + offset + 32, src, blocksize); // block data
2231 
2232  src += blocksize;
2233  srclen -= blocksize;
2234  offset += blocksize + 32;
2235  }
2236 
2237  *pdst = dst;
2238  *size = dstlen;
2239 
2240  return 0;
2241 
2242 fail:
2243  av_freep(&dst);
2244  return ret;
2245 }
2246 
2248  MatroskaTrack *track, AVStream *st,
2249  uint8_t *data, int pkt_size,
2250  uint64_t timecode, uint64_t duration,
2251  int64_t pos, int is_keyframe)
2252 {
2253  MatroskaTrackEncoding *encodings = track->encodings.elem;
2254  uint8_t *pkt_data = data;
2255  int offset = 0, res;
2256  AVPacket *pkt;
2257 
2258  if (encodings && encodings->scope & 1) {
2259  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2260  if (res < 0)
2261  return res;
2262  }
2263 
2264  if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2265  uint8_t *wv_data;
2266  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2267  if (res < 0) {
2268  av_log(matroska->ctx, AV_LOG_ERROR,
2269  "Error parsing a wavpack block.\n");
2270  goto fail;
2271  }
2272  if (pkt_data != data)
2273  av_freep(&pkt_data);
2274  pkt_data = wv_data;
2275  }
2276 
2277  if (st->codec->codec_id == AV_CODEC_ID_PRORES)
2278  offset = 8;
2279 
2280  pkt = av_mallocz(sizeof(AVPacket));
2281  /* XXX: prevent data copy... */
2282  if (av_new_packet(pkt, pkt_size + offset) < 0) {
2283  av_free(pkt);
2284  return AVERROR(ENOMEM);
2285  }
2286 
2287  if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
2288  uint8_t *buf = pkt->data;
2289  bytestream_put_be32(&buf, pkt_size);
2290  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2291  }
2292 
2293  memcpy(pkt->data + offset, pkt_data, pkt_size);
2294 
2295  if (pkt_data != data)
2296  av_free(pkt_data);
2297 
2298  pkt->flags = is_keyframe;
2299  pkt->stream_index = st->index;
2300 
2301  if (track->ms_compat)
2302  pkt->dts = timecode;
2303  else
2304  pkt->pts = timecode;
2305  pkt->pos = pos;
2306  if (st->codec->codec_id == AV_CODEC_ID_TEXT)
2308  else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
2309  pkt->duration = duration;
2310 
2311  if (st->codec->codec_id == AV_CODEC_ID_SSA)
2312  matroska_fix_ass_packet(matroska, pkt, duration);
2313 
2314  if (matroska->prev_pkt &&
2315  timecode != AV_NOPTS_VALUE &&
2316  matroska->prev_pkt->pts == timecode &&
2317  matroska->prev_pkt->stream_index == st->index &&
2318  st->codec->codec_id == AV_CODEC_ID_SSA)
2319  matroska_merge_packets(matroska->prev_pkt, pkt);
2320  else {
2321  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2322  matroska->prev_pkt = pkt;
2323  }
2324 
2325  return 0;
2326 
2327 fail:
2328  if (pkt_data != data)
2329  av_freep(&pkt_data);
2330  return res;
2331 }
2332 
2334  int size, int64_t pos, uint64_t cluster_time,
2335  uint64_t block_duration, int is_keyframe,
2336  int64_t cluster_pos)
2337 {
2338  uint64_t timecode = AV_NOPTS_VALUE;
2339  MatroskaTrack *track;
2340  int res = 0;
2341  AVStream *st;
2342  int16_t block_time;
2343  uint32_t *lace_size = NULL;
2344  int n, flags, laces = 0;
2345  uint64_t num, duration;
2346 
2347  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2348  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2349  return n;
2350  }
2351  data += n;
2352  size -= n;
2353 
2354  track = matroska_find_track_by_num(matroska, num);
2355  if (!track || !track->stream) {
2356  av_log(matroska->ctx, AV_LOG_INFO,
2357  "Invalid stream %"PRIu64" or size %u\n", num, size);
2358  return AVERROR_INVALIDDATA;
2359  } else if (size <= 3)
2360  return 0;
2361  st = track->stream;
2362  if (st->discard >= AVDISCARD_ALL)
2363  return res;
2364 
2365  block_time = AV_RB16(data);
2366  data += 2;
2367  flags = *data++;
2368  size -= 3;
2369  if (is_keyframe == -1)
2370  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2371 
2372  if (cluster_time != (uint64_t) -1 &&
2373  (block_time >= 0 || cluster_time >= -block_time)) {
2374  timecode = cluster_time + block_time - track->codec_delay;
2375  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2376  timecode < track->end_timecode)
2377  is_keyframe = 0; /* overlapping subtitles are not key frame */
2378  if (is_keyframe)
2379  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2381  }
2382 
2383  if (matroska->skip_to_keyframe &&
2384  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2385  if (!is_keyframe || timecode < matroska->skip_to_timecode)
2386  return res;
2387  matroska->skip_to_keyframe = 0;
2388  }
2389 
2390  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2391  &lace_size, &laces);
2392 
2393  if (res)
2394  goto end;
2395 
2396  if (block_duration != AV_NOPTS_VALUE) {
2397  duration = block_duration / laces;
2398  if (block_duration != duration * laces) {
2399  av_log(matroska->ctx, AV_LOG_WARNING,
2400  "Incorrect block_duration, possibly corrupted container");
2401  }
2402  } else {
2403  duration = track->default_duration / matroska->time_scale;
2404  block_duration = duration * laces;
2405  }
2406 
2407  if (timecode != AV_NOPTS_VALUE)
2408  track->end_timecode =
2409  FFMAX(track->end_timecode, timecode + block_duration);
2410 
2411  for (n = 0; n < laces; n++) {
2412  if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2413  st->codec->codec_id == AV_CODEC_ID_COOK ||
2414  st->codec->codec_id == AV_CODEC_ID_SIPR ||
2415  st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2416  st->codec->block_align && track->audio.sub_packet_size) {
2417  res = matroska_parse_rm_audio(matroska, track, st, data,
2418  lace_size[n],
2419  timecode, duration, pos);
2420  if (res)
2421  goto end;
2422  } else {
2423  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2424  timecode, duration, pos,
2425  !n ? is_keyframe : 0);
2426  if (res)
2427  goto end;
2428  }
2429 
2430  if (timecode != AV_NOPTS_VALUE)
2431  timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2432  data += lace_size[n];
2433  }
2434 
2435 end:
2436  av_free(lace_size);
2437  return res;
2438 }
2439 
2441 {
2442  EbmlList *blocks_list;
2443  MatroskaBlock *blocks;
2444  int i, res;
2445  res = ebml_parse(matroska,
2446  matroska_cluster_incremental_parsing,
2447  &matroska->current_cluster);
2448  if (res == 1) {
2449  /* New Cluster */
2450  if (matroska->current_cluster_pos)
2451  ebml_level_end(matroska);
2452  ebml_free(matroska_cluster, &matroska->current_cluster);
2453  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2454  matroska->current_cluster_num_blocks = 0;
2455  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2456  matroska->prev_pkt = NULL;
2457  /* sizeof the ID which was already read */
2458  if (matroska->current_id)
2459  matroska->current_cluster_pos -= 4;
2460  res = ebml_parse(matroska,
2461  matroska_clusters_incremental,
2462  &matroska->current_cluster);
2463  /* Try parsing the block again. */
2464  if (res == 1)
2465  res = ebml_parse(matroska,
2466  matroska_cluster_incremental_parsing,
2467  &matroska->current_cluster);
2468  }
2469 
2470  if (!res &&
2471  matroska->current_cluster_num_blocks <
2472  matroska->current_cluster.blocks.nb_elem) {
2473  blocks_list = &matroska->current_cluster.blocks;
2474  blocks = blocks_list->elem;
2475 
2476  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2477  i = blocks_list->nb_elem - 1;
2478  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2479  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2480  if (!blocks[i].non_simple)
2481  blocks[i].duration = AV_NOPTS_VALUE;
2482  res = matroska_parse_block(matroska, blocks[i].bin.data,
2483  blocks[i].bin.size, blocks[i].bin.pos,
2484  matroska->current_cluster.timecode,
2485  blocks[i].duration, is_keyframe,
2486  matroska->current_cluster_pos);
2487  }
2488  }
2489 
2490  if (res < 0)
2491  matroska->done = 1;
2492  return res;
2493 }
2494 
2496 {
2497  MatroskaCluster cluster = { 0 };
2498  EbmlList *blocks_list;
2499  MatroskaBlock *blocks;
2500  int i, res;
2501  int64_t pos;
2502 
2503  if (!matroska->contains_ssa)
2504  return matroska_parse_cluster_incremental(matroska);
2505  pos = avio_tell(matroska->ctx->pb);
2506  matroska->prev_pkt = NULL;
2507  if (matroska->current_id)
2508  pos -= 4; /* sizeof the ID which was already read */
2509  res = ebml_parse(matroska, matroska_clusters, &cluster);
2510  blocks_list = &cluster.blocks;
2511  blocks = blocks_list->elem;
2512  for (i = 0; i < blocks_list->nb_elem && !res; i++)
2513  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2514  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2515  if (!blocks[i].non_simple)
2516  blocks[i].duration = AV_NOPTS_VALUE;
2517  res = matroska_parse_block(matroska, blocks[i].bin.data,
2518  blocks[i].bin.size, blocks[i].bin.pos,
2519  cluster.timecode, blocks[i].duration,
2520  is_keyframe, pos);
2521  }
2522  ebml_free(matroska_cluster, &cluster);
2523  return res;
2524 }
2525 
2527 {
2528  MatroskaDemuxContext *matroska = s->priv_data;
2529  int ret = 0;
2530 
2531  while (!ret && matroska_deliver_packet(matroska, pkt)) {
2532  int64_t pos = avio_tell(matroska->ctx->pb);
2533  if (matroska->done)
2534  return AVERROR_EOF;
2535  if (matroska_parse_cluster(matroska) < 0)
2536  ret = matroska_resync(matroska, pos);
2537  }
2538 
2539  if (ret == AVERROR_INVALIDDATA && pkt->data) {
2540  pkt->flags |= AV_PKT_FLAG_CORRUPT;
2541  return 0;
2542  }
2543 
2544  return ret;
2545 }
2546 
2547 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2548  int64_t timestamp, int flags)
2549 {
2550  MatroskaDemuxContext *matroska = s->priv_data;
2551  MatroskaTrack *tracks = NULL;
2552  AVStream *st = s->streams[stream_index];
2553  int i, index, index_sub, index_min;
2554 
2555  /* Parse the CUES now since we need the index data to seek. */
2556  if (matroska->cues_parsing_deferred) {
2557  matroska_parse_cues(matroska);
2558  matroska->cues_parsing_deferred = 0;
2559  }
2560 
2561  if (!st->nb_index_entries)
2562  return 0;
2563  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2564 
2565  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2566  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
2567  SEEK_SET);
2568  matroska->current_id = 0;
2569  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2570  matroska_clear_queue(matroska);
2571  if (matroska_parse_cluster(matroska) < 0)
2572  break;
2573  }
2574  }
2575 
2576  matroska_clear_queue(matroska);
2577  if (index < 0)
2578  return 0;
2579 
2580  index_min = index;
2581  tracks = matroska->tracks.elem;
2582  for (i = 0; i < matroska->tracks.nb_elem; i++) {
2583  tracks[i].audio.pkt_cnt = 0;
2584  tracks[i].audio.sub_packet_cnt = 0;
2585  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2586  tracks[i].end_timecode = 0;
2587  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2588  tracks[i].stream->discard != AVDISCARD_ALL) {
2589  index_sub = av_index_search_timestamp(
2590  tracks[i].stream, st->index_entries[index].timestamp,
2592  if (index_sub >= 0 &&
2593  st->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
2594  st->index_entries[index].timestamp -
2595  st->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
2596  index_min = index_sub;
2597  }
2598  }
2599 
2600  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2601  matroska->current_id = 0;
2602  matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2603  matroska->skip_to_timecode = st->index_entries[index].timestamp;
2604  matroska->done = 0;
2605  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2606  return 0;
2607 }
2608 
2610 {
2611  MatroskaDemuxContext *matroska = s->priv_data;
2612  MatroskaTrack *tracks = matroska->tracks.elem;
2613  int n;
2614 
2615  matroska_clear_queue(matroska);
2616 
2617  for (n = 0; n < matroska->tracks.nb_elem; n++)
2618  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2619  av_free(tracks[n].audio.buf);
2620  ebml_free(matroska_cluster, &matroska->current_cluster);
2621  ebml_free(matroska_segment, matroska);
2622 
2623  return 0;
2624 }
2625 
2627  .name = "matroska,webm",
2628  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2629  .extensions = "mkv,mk3d,mka,mks",
2630  .priv_data_size = sizeof(MatroskaDemuxContext),
2636  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
2637 };
const char * s
Definition: matroskadec.c:84
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:1609
static EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:452
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:1307
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:1273
#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:106
int size
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:243
uint64_t type
Definition: matroskadec.c:149
#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:1946
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:107
uint64_t version
Definition: matroskadec.c:101
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:2626
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:1181
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:1943
#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:605
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:998
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:804
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:2829
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:208
#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:214
uint64_t uid
Definition: matroskadec.c:148
static EbmlSyntax matroska_segments[]
Definition: matroskadec.c:505
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
MatroskaCluster current_cluster
Definition: matroskadec.c:270
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:974
#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:157
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:156
#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:197
#define FF_ARRAY_ELEMS(a)
discard all
Definition: avcodec.h:568
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:237
static EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:328
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:144
union EbmlSyntax::@109 def
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:580
MatroskaTrackAudio audio
Definition: matroskadec.c:159
uint64_t duration
Definition: matroskadec.c:277
const struct EbmlSyntax * n
Definition: matroskadec.c:85
#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:1844
static EbmlSyntax matroska_tag[]
Definition: matroskadec.c:471
static EbmlSyntax matroska_attachment[]
Definition: matroskadec.c:388
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:194
static int64_t duration
Definition: avplay.c:246
static EbmlSyntax matroska_track[]
Definition: matroskadec.c:355
#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:2601
#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:200
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:1104
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:100
#define MATROSKA_ID_CODECDOWNLOADURL
Definition: matroska.h:87
int64_t end_timecode
Definition: matroskadec.c:164
#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
uint64_t stereo_mode
Definition: matroskadec.c:126
MatroskaTrackVideo video
Definition: matroskadec.c:158
#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:192
#define AV_RB32
Definition: intreadwrite.h:130
int ff_mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
Definition: matroska.c:109
#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:1435
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:520
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
const char * name
AVStream * stream
Definition: matroskadec.c:174
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2521
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:85
char * language
Definition: matroskadec.c:153
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:2333
#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:973
uint64_t typevalue
Definition: matroskadec.c:206
uint64_t codec_delay
Definition: matroskadec.c:161
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2440
#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:283
#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:1181
#define MATROSKA_ID_CUES
Definition: matroska.h:58
#define EBML_MAX_DEPTH
Definition: matroska.h:253
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:991
#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:383
EbmlList sub
Definition: matroskadec.c:201
#define r
Definition: input.c:51
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1019
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2495
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:855
#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:299
#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:1222
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:674
#define AV_RB16
Definition: intreadwrite.h:53
AVChapter * chapter
Definition: matroskadec.c:183
#define AVERROR(e)
Definition: error.h:43
static EbmlSyntax matroska_index[]
Definition: matroskadec.c:447
int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
Definition: riffdec.c:82
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:145
#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:793
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:1017
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:2098
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:170
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:379
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:956
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:154
Definition: graph2dot.c:49
static EbmlSyntax matroska_clusters[]
Definition: matroskadec.c:529
static EbmlSyntax matroska_chapter[]
Definition: matroskadec.c:420
enum AVCodecID id
Definition: matroska.h:249
#define MATROSKA_ID_VIDEOPIXELCROPR
Definition: matroska.h:113
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
#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:228
#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:397
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:979
static EbmlSyntax matroska_cluster_incremental_parsing[]
Definition: matroskadec.c:538
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1868
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:964
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:91
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:199
#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:429
#define CONFIG_BZLIB
Definition: config.h:322
uint64_t skip_to_timecode
Definition: matroskadec.c:263
Definition: dct-test.c:50
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:1825
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1386
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:1114
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1359
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:64
uint64_t start
Definition: matroskadec.c:178
#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:255
#define MATROSKA_ID_TAGNAME
Definition: matroska.h:150
#define MATROSKA_ID_TRACKTIMECODESCALE
Definition: matroska.h:101
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
static int ebml_parse_elem(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:886
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:628
int width
picture width / height.
Definition: avcodec.h:1229
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:204
uint64_t id_length
Definition: matroskadec.c:103
static EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:350
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num)
Definition: matroskadec.c:1038
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:342
#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:2609
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
EbmlBin codec_priv
Definition: matroskadec.c:152
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
Definition: matroskadec.c:724
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1052
#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:2433
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:493
#define MATROSKA_ID_CHAPTERS
Definition: matroska.h:63
static int matroska_probe(AVProbeData *p)
Definition: matroskadec.c:996
#define EBML_ID_VOID
Definition: matroska.h:45
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1238
#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:1445
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:2547
static EbmlSyntax matroska_seekhead[]
Definition: matroskadec.c:488
Stream structure.
Definition: avformat.h:699
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:2167
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
NULL
Definition: eval.c:55
EbmlList encodings
Definition: matroskadec.c:160
char * codec_id
Definition: matroskadec.c:151
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:668
int64_t current_cluster_pos
Definition: matroskadec.c:269
#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:1500
#define MATROSKA_ID_TRACKFLAGFORCED
Definition: matroska.h:94
#define MATROSKA_ID_TAGS
Definition: matroska.h:59
enum AVMediaType codec_type
Definition: avcodec.h:1058
version
Definition: ffv1enc.c:1080
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
Definition: matroskadec.c:771
enum AVCodecID codec_id
Definition: avcodec.h:1067
#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:66
int sample_rate
samples per second
Definition: avcodec.h:1807
AVIOContext * pb
I/O context.
Definition: avformat.h:964
#define CONFIG_ZLIB
Definition: config.h:358
#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:477
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:1082
#define MATROSKA_ID_TRACKFLAGENABLED
Definition: matroska.h:92
#define MATROSKA_ID_TRACKS
Definition: matroska.h:57
int extradata_size
Definition: avcodec.h:1165
#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:223
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:552
int nb_index_entries
Definition: avformat.h:880
#define MATROSKA_ID_SEEKENTRY
Definition: matroska.h:163
EbmlList pos
Definition: matroskadec.c:193
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:163
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, int *buf_size, int type, uint32_t **lace_buf, int *laces)
Definition: matroskadec.c:1989
#define MATROSKA_ID_CUETIME
Definition: matroska.h:139
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:2526
static EbmlSyntax matroska_blockgroup[]
Definition: matroskadec.c:510
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:842
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:233
#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:823
int list_elem_size
Definition: matroskadec.c:79
static EbmlSyntax ebml_syntax[]
Definition: matroskadec.c:294
#define CONFIG_LZO
Definition: config.h:390
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:103
#define MATROSKA_ID_CODECID
Definition: matroska.h:83
static EbmlSyntax matroska_clusters_incremental[]
Definition: matroskadec.c:561
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
full parsing and repack
Definition: avformat.h:653
int64_t reference
Definition: matroskadec.c:278
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:142
uint64_t num
Definition: matroskadec.c:147
#define MATROSKA_ID_CUETRACK
Definition: matroska.h:143
static EbmlSyntax matroska_track_encoding_compression[]
Definition: matroskadec.c:336
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:572
#define MATROSKA_ID_CODECDELAY
Definition: matroska.h:89
#define MATROSKA_ID_CHAPTERTIMESTART
Definition: matroska.h:193
double time_scale
Definition: matroskadec.c:154
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:198
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:482
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:1020
uint32_t id
Definition: matroskadec.c:77
static EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:462
MatroskaTagTarget target
Definition: matroskadec.c:213
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:1808
#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:279
#define MATROSKA_ID_CHAPTERUID
Definition: matroska.h:202
static EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c:441
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
Definition: matroskadec.c:747
#define MATROSKA_ID_VIDEODISPLAYUNIT
Definition: matroska.h:114
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
Definition: matroskadec.c:687
#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:972
#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:1224
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:434
static int ebml_read_float(AVIOContext *pb, int size, double *num)
Definition: matroskadec.c:706
#define MATROSKA_ID_DURATION
Definition: matroska.h:67
uint64_t length
Definition: matroskadec.c:224
#define AV_WL16(p, d)
Definition: intreadwrite.h:225
static int matroska_aac_profile(char *codec_id)
Definition: matroskadec.c:1424
int stream_index
Definition: avcodec.h:975
#define EBML_ID_DOCTYPEVERSION
Definition: matroska.h:41
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1975
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:408
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:229
This structure stores compressed data.
Definition: avcodec.h:950
static EbmlSyntax matroska_chapter_display[]
Definition: matroskadec.c:402
#define MATROSKA_ID_CODECSTATE
Definition: matroska.h:180
uint64_t default_duration
Definition: matroskadec.c:155
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:2247
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:966
#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:26
static const char *const matroska_doctypes[]
Definition: matroskadec.c:570
static EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:310
uint64_t attachuid
Definition: matroskadec.c:209