FFmpeg  4.2.3
matroskadec.c
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1 /*
2  * Matroska file demuxer
3  * Copyright (c) 2003-2008 The FFmpeg Project
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Matroska file demuxer
25  * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26  * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27  * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28  * @see specs available on the Matroska project page: http://www.matroska.org/
29  */
30 
31 #include "config.h"
32 
33 #include <inttypes.h>
34 #include <stdio.h>
35 
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
46 #include "libavutil/spherical.h"
47 
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/flac.h"
50 #include "libavcodec/mpeg4audio.h"
51 
52 #include "avformat.h"
53 #include "avio_internal.h"
54 #include "internal.h"
55 #include "isom.h"
56 #include "matroska.h"
57 #include "oggdec.h"
58 /* For ff_codec_get_id(). */
59 #include "riff.h"
60 #include "rmsipr.h"
61 
62 #if CONFIG_BZLIB
63 #include <bzlib.h>
64 #endif
65 #if CONFIG_ZLIB
66 #include <zlib.h>
67 #endif
68 
69 #include "qtpalette.h"
70 
71 #define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
72 #define NEEDS_CHECKING 2 /* Indicates that some error checks
73  * still need to be performed */
74 #define LEVEL_ENDED 3 /* return value of ebml_parse when the
75  * syntax level used for parsing ended. */
76 #define SKIP_THRESHOLD 1024 * 1024 /* In non-seekable mode, if more than SKIP_THRESHOLD
77  * of unkown, potentially damaged data is encountered,
78  * it is considered an error. */
79 #define UNKNOWN_EQUIV 50 * 1024 /* An unknown element is considered equivalent
80  * to this many bytes of unknown data for the
81  * SKIP_THRESHOLD check. */
82 
83 typedef enum {
95 } EbmlType;
96 
97 typedef const struct EbmlSyntax {
98  uint32_t id;
101  size_t data_offset;
102  union {
103  int64_t i;
104  uint64_t u;
105  double f;
106  const char *s;
107  const struct EbmlSyntax *n;
108  } def;
109 } EbmlSyntax;
110 
111 typedef struct EbmlList {
112  int nb_elem;
113  unsigned int alloc_elem_size;
114  void *elem;
115 } EbmlList;
116 
117 typedef struct EbmlBin {
118  int size;
121  int64_t pos;
122 } EbmlBin;
123 
124 typedef struct Ebml {
125  uint64_t version;
126  uint64_t max_size;
127  uint64_t id_length;
128  char *doctype;
129  uint64_t doctype_version;
130 } Ebml;
131 
132 typedef struct MatroskaTrackCompression {
133  uint64_t algo;
136 
137 typedef struct MatroskaTrackEncryption {
138  uint64_t algo;
141 
142 typedef struct MatroskaTrackEncoding {
143  uint64_t scope;
144  uint64_t type;
148 
149 typedef struct MatroskaMasteringMeta {
150  double r_x;
151  double r_y;
152  double g_x;
153  double g_y;
154  double b_x;
155  double b_y;
156  double white_x;
157  double white_y;
161 
162 typedef struct MatroskaTrackVideoColor {
165  uint64_t chroma_sub_horz;
166  uint64_t chroma_sub_vert;
167  uint64_t cb_sub_horz;
168  uint64_t cb_sub_vert;
171  uint64_t range;
173  uint64_t primaries;
174  uint64_t max_cll;
175  uint64_t max_fall;
178 
180  uint64_t type;
181  EbmlBin private;
182  double yaw;
183  double pitch;
184  double roll;
186 
187 typedef struct MatroskaTrackVideo {
188  double frame_rate;
189  uint64_t display_width;
190  uint64_t display_height;
191  uint64_t pixel_width;
192  uint64_t pixel_height;
194  uint64_t display_unit;
195  uint64_t interlaced;
196  uint64_t field_order;
197  uint64_t stereo_mode;
198  uint64_t alpha_mode;
202 
203 typedef struct MatroskaTrackAudio {
204  double samplerate;
206  uint64_t bitdepth;
207  uint64_t channels;
208 
209  /* real audio header (extracted from extradata) */
215  int pkt_cnt;
216  uint64_t buf_timecode;
219 
220 typedef struct MatroskaTrackPlane {
221  uint64_t uid;
222  uint64_t type;
224 
225 typedef struct MatroskaTrackOperation {
228 
229 typedef struct MatroskaTrack {
230  uint64_t num;
231  uint64_t uid;
232  uint64_t type;
233  char *name;
234  char *codec_id;
236  char *language;
237  double time_scale;
239  uint64_t flag_default;
240  uint64_t flag_forced;
241  uint64_t seek_preroll;
246  uint64_t codec_delay;
248 
250  int64_t end_timecode;
253 
254  uint32_t palette[AVPALETTE_COUNT];
256 } MatroskaTrack;
257 
258 typedef struct MatroskaAttachment {
259  uint64_t uid;
260  char *filename;
261  char *mime;
263 
266 
267 typedef struct MatroskaChapter {
268  uint64_t start;
269  uint64_t end;
270  uint64_t uid;
271  char *title;
272 
275 
276 typedef struct MatroskaIndexPos {
277  uint64_t track;
278  uint64_t pos;
280 
281 typedef struct MatroskaIndex {
282  uint64_t time;
284 } MatroskaIndex;
285 
286 typedef struct MatroskaTag {
287  char *name;
288  char *string;
289  char *lang;
290  uint64_t def;
292 } MatroskaTag;
293 
294 typedef struct MatroskaTagTarget {
295  char *type;
296  uint64_t typevalue;
297  uint64_t trackuid;
298  uint64_t chapteruid;
299  uint64_t attachuid;
301 
302 typedef struct MatroskaTags {
305 } MatroskaTags;
306 
307 typedef struct MatroskaSeekhead {
308  uint64_t id;
309  uint64_t pos;
311 
312 typedef struct MatroskaLevel {
313  uint64_t start;
314  uint64_t length;
315 } MatroskaLevel;
316 
317 typedef struct MatroskaBlock {
318  uint64_t duration;
319  int64_t reference;
320  uint64_t non_simple;
322  uint64_t additional_id;
325 } MatroskaBlock;
326 
327 typedef struct MatroskaCluster {
329  uint64_t timecode;
330  int64_t pos;
332 
333 typedef struct MatroskaLevel1Element {
334  int64_t pos;
335  uint32_t id;
336  int parsed;
338 
339 typedef struct MatroskaDemuxContext {
340  const AVClass *class;
342 
343  /* EBML stuff */
346  uint32_t current_id;
347  int64_t resync_pos;
349 
350  uint64_t time_scale;
351  double duration;
352  char *title;
353  char *muxingapp;
361 
362  /* byte position of the segment inside the stream */
363  int64_t segment_start;
364 
365  /* the packet queue */
368 
369  int done;
370 
371  /* What to skip before effectively reading a packet. */
374 
375  /* File has a CUES element, but we defer parsing until it is needed. */
377 
378  /* Level1 elements and whether they were read yet */
379  MatroskaLevel1Element level1_elems[64];
381 
383 
384  /* WebM DASH Manifest live flag */
385  int is_live;
386 
387  /* Bandwidth value for WebM DASH Manifest */
390 
391 #define CHILD_OF(parent) { .def = { .n = parent } }
392 
393 // The following forward declarations need their size because
394 // a tentative definition with internal linkage must not be an
395 // incomplete type (6.7.2 in C90, 6.9.2 in C99).
396 // Removing the sizes breaks MSVC.
403 
405  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
406  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
407  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
408  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
409  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
411  { EBML_ID_DOCTYPEVERSION, EBML_NONE },
412  CHILD_OF(ebml_syntax)
413 };
414 
415 static EbmlSyntax ebml_syntax[] = {
416  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
418  { 0 }
419 };
420 
422  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
424  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
426  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
427  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
428  { MATROSKA_ID_SEGMENTUID, EBML_NONE },
429  CHILD_OF(matroska_segment)
430 };
431 
433  { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
434  { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
435  { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
436  { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
437  { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
438  { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
439  { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
440  { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
441  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
442  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
443  CHILD_OF(matroska_track_video_color)
444 };
445 
446 static EbmlSyntax matroska_track_video_color[] = {
447  { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
448  { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
449  { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
450  { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
451  { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
452  { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
458  { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
459  { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
460  { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
461  CHILD_OF(matroska_track_video)
462 };
463 
470  CHILD_OF(matroska_track_video)
471 };
472 
473 static EbmlSyntax matroska_track_video[] = {
474  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
475  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
476  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
477  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
478  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
479  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
480  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
481  { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
482  { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
484  { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
485  { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
486  { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
491  { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
492  CHILD_OF(matroska_track)
493 };
494 
496  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
497  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
498  { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
499  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
500  CHILD_OF(matroska_track)
501 };
502 
506  CHILD_OF(matroska_track_encoding)
507 };
508 
513  { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
514  { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
515  { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
516  { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
517  CHILD_OF(matroska_track_encoding)
518 };
519 static EbmlSyntax matroska_track_encoding[] = {
520  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
521  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
522  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
523  { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
525  CHILD_OF(matroska_track_encodings)
526 };
527 
528 static EbmlSyntax matroska_track_encodings[] = {
529  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
530  CHILD_OF(matroska_track)
531 };
532 
536  CHILD_OF(matroska_track_combine_planes)
537 };
538 
539 static EbmlSyntax matroska_track_combine_planes[] = {
540  { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
541  CHILD_OF(matroska_track_operation)
542 };
543 
544 static EbmlSyntax matroska_track_operation[] = {
545  { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
546  CHILD_OF(matroska_track)
547 };
548 
549 static EbmlSyntax matroska_track[] = {
550  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
552  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
555  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
556  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
557  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
558  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
559  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
560  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
561  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
562  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
563  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
564  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
565  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
566  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
567  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
569  { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
570  { MATROSKA_ID_CODECNAME, EBML_NONE },
571  { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
572  { MATROSKA_ID_CODECINFOURL, EBML_NONE },
573  { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
574  { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
575  { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
576  CHILD_OF(matroska_tracks)
577 };
578 
579 static EbmlSyntax matroska_tracks[] = {
580  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
581  CHILD_OF(matroska_segment)
582 };
583 
586  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
587  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
588  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
590  CHILD_OF(matroska_attachments)
591 };
592 
593 static EbmlSyntax matroska_attachments[] = {
594  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
595  CHILD_OF(matroska_segment)
596 };
597 
599  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
601  { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
602  CHILD_OF(matroska_chapter_entry)
603 };
604 
605 static EbmlSyntax matroska_chapter_entry[] = {
609  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
611  { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
612  { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
613  { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
614  CHILD_OF(matroska_chapter)
615 };
616 
617 static EbmlSyntax matroska_chapter[] = {
618  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
620  { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
621  { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
622  { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
623  CHILD_OF(matroska_chapters)
624 };
625 
626 static EbmlSyntax matroska_chapters[] = {
627  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
628  CHILD_OF(matroska_segment)
629 };
630 
632  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
635  { MATROSKA_ID_CUEDURATION, EBML_NONE },
636  { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
637  CHILD_OF(matroska_index_entry)
638 };
639 
640 static EbmlSyntax matroska_index_entry[] = {
641  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
642  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
643  CHILD_OF(matroska_index)
644 };
645 
646 static EbmlSyntax matroska_index[] = {
647  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
648  CHILD_OF(matroska_segment)
649 };
650 
652  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
653  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
654  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
655  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
657  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
658  CHILD_OF(matroska_tag)
659 };
660 
663  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
664  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
665  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
666  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
667  CHILD_OF(matroska_tag)
668 };
669 
670 static EbmlSyntax matroska_tag[] = {
671  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
672  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
673  CHILD_OF(matroska_tags)
674 };
675 
676 static EbmlSyntax matroska_tags[] = {
677  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
678  CHILD_OF(matroska_segment)
679 };
680 
682  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
683  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
684  CHILD_OF(matroska_seekhead)
685 };
686 
687 static EbmlSyntax matroska_seekhead[] = {
688  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
689  CHILD_OF(matroska_segment)
690 };
691 
692 static EbmlSyntax matroska_segment[] = {
694  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
695  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
696  { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
697  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
698  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
699  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
700  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
701  { 0 } /* We don't want to go back to level 0, so don't add the parent. */
702 };
703 
705  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
706  { 0 }
707 };
708 
710  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id), { .u = 1 } },
711  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
712  CHILD_OF(matroska_blockadditions)
713 };
714 
715 static EbmlSyntax matroska_blockadditions[] = {
716  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
717  CHILD_OF(matroska_blockgroup)
718 };
719 
720 static EbmlSyntax matroska_blockgroup[] = {
721  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
722  { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
724  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
725  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
727  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
728  CHILD_OF(matroska_cluster_parsing)
729 };
730 
731 // The following array contains SimpleBlock and BlockGroup twice
732 // in order to reuse the other values for matroska_cluster_enter.
733 static EbmlSyntax matroska_cluster_parsing[] = {
734  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
735  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, { .n = matroska_blockgroup } },
736  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
738  { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
740  { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
741  CHILD_OF(matroska_segment)
742 };
743 
745  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = &matroska_cluster_parsing[2] } },
746  { 0 }
747 };
748 #undef CHILD_OF
749 
750 static const char *const matroska_doctypes[] = { "matroska", "webm" };
751 
753 
754 /*
755  * This function prepares the status for parsing of level 1 elements.
756  */
758  uint32_t id, int64_t position)
759 {
760  if (position >= 0) {
761  int64_t err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
762  if (err < 0)
763  return err;
764  }
765 
766  matroska->current_id = id;
767  matroska->num_levels = 1;
768  matroska->unknown_count = 0;
769  matroska->resync_pos = avio_tell(matroska->ctx->pb);
770  if (id)
771  matroska->resync_pos -= (av_log2(id) + 7) / 8;
772 
773  return 0;
774 }
775 
776 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
777 {
778  AVIOContext *pb = matroska->ctx->pb;
779  uint32_t id;
780 
781  /* Try to seek to the last position to resync from. If this doesn't work,
782  * we resync from the earliest position available: The start of the buffer. */
783  if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
784  av_log(matroska->ctx, AV_LOG_WARNING,
785  "Seek to desired resync point failed. Seeking to "
786  "earliest point available instead.\n");
787  avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
788  last_pos + 1), SEEK_SET);
789  }
790 
791  id = avio_rb32(pb);
792 
793  // try to find a toplevel element
794  while (!avio_feof(pb)) {
795  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
796  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
798  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
799  /* Prepare the context for parsing of a level 1 element. */
800  matroska_reset_status(matroska, id, -1);
801  /* Given that we are here means that an error has occurred,
802  * so treat the segment as unknown length in order not to
803  * discard valid data that happens to be beyond the designated
804  * end of the segment. */
805  matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
806  return 0;
807  }
808  id = (id << 8) | avio_r8(pb);
809  }
810 
811  matroska->done = 1;
812  return pb->error ? pb->error : AVERROR_EOF;
813 }
814 
815 /*
816  * Read: an "EBML number", which is defined as a variable-length
817  * array of bytes. The first byte indicates the length by giving a
818  * number of 0-bits followed by a one. The position of the first
819  * "one" bit inside the first byte indicates the length of this
820  * number.
821  * Returns: number of bytes read, < 0 on error
822  */
824  int max_size, uint64_t *number, int eof_forbidden)
825 {
826  int read, n = 1;
827  uint64_t total;
828  int64_t pos;
829 
830  /* The first byte tells us the length in bytes - except when it is zero. */
831  total = avio_r8(pb);
832  if (pb->eof_reached)
833  goto err;
834 
835  /* get the length of the EBML number */
836  read = 8 - ff_log2_tab[total];
837 
838  if (!total || read > max_size) {
839  pos = avio_tell(pb) - 1;
840  if (!total) {
841  av_log(matroska->ctx, AV_LOG_ERROR,
842  "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
843  "of an EBML number\n", pos, pos);
844  } else {
845  av_log(matroska->ctx, AV_LOG_ERROR,
846  "Length %d indicated by an EBML number's first byte 0x%02x "
847  "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
848  read, (uint8_t) total, pos, pos, max_size);
849  }
850  return AVERROR_INVALIDDATA;
851  }
852 
853  /* read out length */
854  total ^= 1 << ff_log2_tab[total];
855  while (n++ < read)
856  total = (total << 8) | avio_r8(pb);
857 
858  if (pb->eof_reached) {
859  eof_forbidden = 1;
860  goto err;
861  }
862 
863  *number = total;
864 
865  return read;
866 
867 err:
868  pos = avio_tell(pb);
869  if (pb->error) {
870  av_log(matroska->ctx, AV_LOG_ERROR,
871  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
872  pos, pos);
873  return pb->error;
874  }
875  if (eof_forbidden) {
876  av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
877  "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
878  return AVERROR(EIO);
879  }
880  return AVERROR_EOF;
881 }
882 
883 /**
884  * Read a EBML length value.
885  * This needs special handling for the "unknown length" case which has multiple
886  * encodings.
887  */
889  uint64_t *number)
890 {
891  int res = ebml_read_num(matroska, pb, 8, number, 1);
892  if (res > 0 && *number + 1 == 1ULL << (7 * res))
893  *number = EBML_UNKNOWN_LENGTH;
894  return res;
895 }
896 
897 /*
898  * Read the next element as an unsigned int.
899  * Returns NEEDS_CHECKING.
900  */
901 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
902 {
903  int n = 0;
904 
905  /* big-endian ordering; build up number */
906  *num = 0;
907  while (n++ < size)
908  *num = (*num << 8) | avio_r8(pb);
909 
910  return NEEDS_CHECKING;
911 }
912 
913 /*
914  * Read the next element as a signed int.
915  * Returns NEEDS_CHECKING.
916  */
917 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
918 {
919  int n = 1;
920 
921  if (size == 0) {
922  *num = 0;
923  } else {
924  *num = sign_extend(avio_r8(pb), 8);
925 
926  /* big-endian ordering; build up number */
927  while (n++ < size)
928  *num = ((uint64_t)*num << 8) | avio_r8(pb);
929  }
930 
931  return NEEDS_CHECKING;
932 }
933 
934 /*
935  * Read the next element as a float.
936  * Returns NEEDS_CHECKING or < 0 on obvious failure.
937  */
938 static int ebml_read_float(AVIOContext *pb, int size, double *num)
939 {
940  if (size == 0)
941  *num = 0;
942  else if (size == 4)
943  *num = av_int2float(avio_rb32(pb));
944  else if (size == 8)
945  *num = av_int2double(avio_rb64(pb));
946  else
947  return AVERROR_INVALIDDATA;
948 
949  return NEEDS_CHECKING;
950 }
951 
952 /*
953  * Read the next element as an ASCII string.
954  * 0 is success, < 0 or NEEDS_CHECKING is failure.
955  */
956 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
957 {
958  char *res;
959  int ret;
960 
961  /* EBML strings are usually not 0-terminated, so we allocate one
962  * byte more, read the string and NULL-terminate it ourselves. */
963  if (!(res = av_malloc(size + 1)))
964  return AVERROR(ENOMEM);
965  if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
966  av_free(res);
967  return ret < 0 ? ret : NEEDS_CHECKING;
968  }
969  (res)[size] = '\0';
970  av_free(*str);
971  *str = res;
972 
973  return 0;
974 }
975 
976 /*
977  * Read the next element as binary data.
978  * 0 is success, < 0 or NEEDS_CHECKING is failure.
979  */
980 static int ebml_read_binary(AVIOContext *pb, int length,
981  int64_t pos, EbmlBin *bin)
982 {
983  int ret;
984 
985  ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
986  if (ret < 0)
987  return ret;
988  memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
989 
990  bin->data = bin->buf->data;
991  bin->size = length;
992  bin->pos = pos;
993  if ((ret = avio_read(pb, bin->data, length)) != length) {
994  av_buffer_unref(&bin->buf);
995  bin->data = NULL;
996  bin->size = 0;
997  return ret < 0 ? ret : NEEDS_CHECKING;
998  }
999 
1000  return 0;
1001 }
1002 
1003 /*
1004  * Read the next element, but only the header. The contents
1005  * are supposed to be sub-elements which can be read separately.
1006  * 0 is success, < 0 is failure.
1007  */
1009  uint64_t length, int64_t pos)
1010 {
1012 
1013  if (matroska->num_levels >= EBML_MAX_DEPTH) {
1014  av_log(matroska->ctx, AV_LOG_ERROR,
1015  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1016  return AVERROR(ENOSYS);
1017  }
1018 
1019  level = &matroska->levels[matroska->num_levels++];
1020  level->start = pos;
1021  level->length = length;
1022 
1023  return 0;
1024 }
1025 
1026 /*
1027  * Read signed/unsigned "EBML" numbers.
1028  * Return: number of bytes processed, < 0 on error
1029  */
1031  uint8_t *data, uint32_t size, uint64_t *num)
1032 {
1033  AVIOContext pb;
1034  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1035  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1036 }
1037 
1038 /*
1039  * Same as above, but signed.
1040  */
1042  uint8_t *data, uint32_t size, int64_t *num)
1043 {
1044  uint64_t unum;
1045  int res;
1046 
1047  /* read as unsigned number first */
1048  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1049  return res;
1050 
1051  /* make signed (weird way) */
1052  *num = unum - ((1LL << (7 * res - 1)) - 1);
1053 
1054  return res;
1055 }
1056 
1057 static int ebml_parse(MatroskaDemuxContext *matroska,
1058  EbmlSyntax *syntax, void *data);
1059 
1060 static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1061 {
1062  int i;
1063 
1064  // Whoever touches this should be aware of the duplication
1065  // existing in matroska_cluster_parsing.
1066  for (i = 0; syntax[i].id; i++)
1067  if (id == syntax[i].id)
1068  break;
1069 
1070  return &syntax[i];
1071 }
1072 
1073 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1074  void *data)
1075 {
1076  int res;
1077 
1078  if (data) {
1079  for (int i = 0; syntax[i].id; i++)
1080  switch (syntax[i].type) {
1081  case EBML_UINT:
1082  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1083  break;
1084  case EBML_SINT:
1085  *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1086  break;
1087  case EBML_FLOAT:
1088  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1089  break;
1090  case EBML_STR:
1091  case EBML_UTF8:
1092  // the default may be NULL
1093  if (syntax[i].def.s) {
1094  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1095  *dst = av_strdup(syntax[i].def.s);
1096  if (!*dst)
1097  return AVERROR(ENOMEM);
1098  }
1099  break;
1100  }
1101 
1102  if (!matroska->levels[matroska->num_levels - 1].length) {
1103  matroska->num_levels--;
1104  return 0;
1105  }
1106  }
1107 
1108  do {
1109  res = ebml_parse(matroska, syntax, data);
1110  } while (!res);
1111 
1112  return res == LEVEL_ENDED ? 0 : res;
1113 }
1114 
1115 static int is_ebml_id_valid(uint32_t id)
1116 {
1117  // Due to endian nonsense in Matroska, the highest byte with any bits set
1118  // will contain the leading length bit. This bit in turn identifies the
1119  // total byte length of the element by its position within the byte.
1120  unsigned int bits = av_log2(id);
1121  return id && (bits + 7) / 8 == (8 - bits % 8);
1122 }
1123 
1124 /*
1125  * Allocate and return the entry for the level1 element with the given ID. If
1126  * an entry already exists, return the existing entry.
1127  */
1129  uint32_t id)
1130 {
1131  int i;
1132  MatroskaLevel1Element *elem;
1133 
1134  if (!is_ebml_id_valid(id))
1135  return NULL;
1136 
1137  // Some files link to all clusters; useless.
1138  if (id == MATROSKA_ID_CLUSTER)
1139  return NULL;
1140 
1141  // There can be multiple seekheads.
1142  if (id != MATROSKA_ID_SEEKHEAD) {
1143  for (i = 0; i < matroska->num_level1_elems; i++) {
1144  if (matroska->level1_elems[i].id == id)
1145  return &matroska->level1_elems[i];
1146  }
1147  }
1148 
1149  // Only a completely broken file would have more elements.
1150  // It also provides a low-effort way to escape from circular seekheads
1151  // (every iteration will add a level1 entry).
1152  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1153  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1154  return NULL;
1155  }
1156 
1157  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1158  *elem = (MatroskaLevel1Element){.id = id};
1159 
1160  return elem;
1161 }
1162 
1163 static int ebml_parse(MatroskaDemuxContext *matroska,
1164  EbmlSyntax *syntax, void *data)
1165 {
1166  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1167  // Forbid unknown-length EBML_NONE elements.
1169  [EBML_UINT] = 8,
1170  [EBML_SINT] = 8,
1171  [EBML_FLOAT] = 8,
1172  // max. 16 MB for strings
1173  [EBML_STR] = 0x1000000,
1174  [EBML_UTF8] = 0x1000000,
1175  // max. 256 MB for binary data
1176  [EBML_BIN] = 0x10000000,
1177  // no limits for anything else
1178  };
1179  AVIOContext *pb = matroska->ctx->pb;
1180  uint32_t id;
1181  uint64_t length;
1182  int64_t pos = avio_tell(pb), pos_alt;
1183  int res, update_pos = 1, level_check;
1184  MatroskaLevel1Element *level1_elem;
1185  MatroskaLevel *level = matroska->num_levels ? &matroska->levels[matroska->num_levels - 1] : NULL;
1186 
1187  if (!matroska->current_id) {
1188  uint64_t id;
1189  res = ebml_read_num(matroska, pb, 4, &id, 0);
1190  if (res < 0) {
1191  if (pb->eof_reached && res == AVERROR_EOF) {
1192  if (matroska->is_live)
1193  // in live mode, finish parsing if EOF is reached.
1194  return 1;
1195  if (level && pos == avio_tell(pb)) {
1196  if (level->length == EBML_UNKNOWN_LENGTH) {
1197  // Unknown-length levels automatically end at EOF.
1198  matroska->num_levels--;
1199  return LEVEL_ENDED;
1200  } else {
1201  av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
1202  "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
1203  }
1204  }
1205  }
1206  return res;
1207  }
1208  matroska->current_id = id | 1 << 7 * res;
1209  pos_alt = pos + res;
1210  } else {
1211  pos_alt = pos;
1212  pos -= (av_log2(matroska->current_id) + 7) / 8;
1213  }
1214 
1215  id = matroska->current_id;
1216 
1217  syntax = ebml_parse_id(syntax, id);
1218  if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1219  if (level && level->length == EBML_UNKNOWN_LENGTH) {
1220  // Unknown-length levels end when an element from an upper level
1221  // in the hierarchy is encountered.
1222  while (syntax->def.n) {
1223  syntax = ebml_parse_id(syntax->def.n, id);
1224  if (syntax->id) {
1225  matroska->num_levels--;
1226  return LEVEL_ENDED;
1227  }
1228  };
1229  }
1230 
1231  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32" at pos. "
1232  "%"PRId64"\n", id, pos);
1233  update_pos = 0; /* Don't update resync_pos as an error might have happened. */
1234  }
1235 
1236  if (data) {
1237  data = (char *) data + syntax->data_offset;
1238  if (syntax->list_elem_size) {
1239  EbmlList *list = data;
1240  void *newelem;
1241 
1242  if ((unsigned)list->nb_elem + 1 >= UINT_MAX / syntax->list_elem_size)
1243  return AVERROR(ENOMEM);
1244  newelem = av_fast_realloc(list->elem,
1245  &list->alloc_elem_size,
1246  (list->nb_elem + 1) * syntax->list_elem_size);
1247  if (!newelem)
1248  return AVERROR(ENOMEM);
1249  list->elem = newelem;
1250  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1251  memset(data, 0, syntax->list_elem_size);
1252  list->nb_elem++;
1253  }
1254  }
1255 
1256  if (syntax->type != EBML_STOP) {
1257  matroska->current_id = 0;
1258  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1259  return res;
1260 
1261  pos_alt += res;
1262 
1263  if (matroska->num_levels > 0) {
1264  if (length != EBML_UNKNOWN_LENGTH &&
1265  level->length != EBML_UNKNOWN_LENGTH) {
1266  uint64_t elem_end = pos_alt + length,
1267  level_end = level->start + level->length;
1268 
1269  if (elem_end < level_end) {
1270  level_check = 0;
1271  } else if (elem_end == level_end) {
1272  level_check = LEVEL_ENDED;
1273  } else {
1274  av_log(matroska->ctx, AV_LOG_ERROR,
1275  "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1276  "containing master element ending at 0x%"PRIx64"\n",
1277  pos, elem_end, level_end);
1278  return AVERROR_INVALIDDATA;
1279  }
1280  } else if (length != EBML_UNKNOWN_LENGTH) {
1281  level_check = 0;
1282  } else if (level->length != EBML_UNKNOWN_LENGTH) {
1283  av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1284  "at 0x%"PRIx64" inside parent with finite size\n", pos);
1285  return AVERROR_INVALIDDATA;
1286  } else {
1287  level_check = 0;
1288  if (id != MATROSKA_ID_CLUSTER && (syntax->type == EBML_LEVEL1
1289  || syntax->type == EBML_NEST)) {
1290  // According to the current specifications only clusters and
1291  // segments are allowed to be unknown-length. We also accept
1292  // other unknown-length master elements.
1293  av_log(matroska->ctx, AV_LOG_WARNING,
1294  "Found unknown-length element 0x%"PRIX32" other than "
1295  "a cluster at 0x%"PRIx64". Spec-incompliant, but "
1296  "parsing will nevertheless be attempted.\n", id, pos);
1297  update_pos = -1;
1298  }
1299  }
1300  } else
1301  level_check = 0;
1302 
1303  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1304  if (length != EBML_UNKNOWN_LENGTH) {
1305  av_log(matroska->ctx, AV_LOG_ERROR,
1306  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for element "
1307  "with ID 0x%"PRIX32" at 0x%"PRIx64"\n",
1308  length, max_lengths[syntax->type], id, pos);
1309  } else if (syntax->type != EBML_NONE) {
1310  av_log(matroska->ctx, AV_LOG_ERROR,
1311  "Element with ID 0x%"PRIX32" at pos. 0x%"PRIx64" has "
1312  "unknown length, yet the length of an element of its "
1313  "type must be known.\n", id, pos);
1314  } else {
1315  av_log(matroska->ctx, AV_LOG_ERROR,
1316  "Found unknown-length element with ID 0x%"PRIX32" at "
1317  "pos. 0x%"PRIx64" for which no syntax for parsing is "
1318  "available.\n", id, pos);
1319  }
1320  return AVERROR_INVALIDDATA;
1321  }
1322 
1323  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1324  // Loosing sync will likely manifest itself as encountering unknown
1325  // elements which are not reliably distinguishable from elements
1326  // belonging to future extensions of the format.
1327  // We use a heuristic to detect such situations: If the current
1328  // element is not expected at the current syntax level and there
1329  // were only a few unknown elements in a row, then the element is
1330  // skipped or considered defective based upon the length of the
1331  // current element (i.e. how much would be skipped); if there were
1332  // more than a few skipped elements in a row and skipping the current
1333  // element would lead us more than SKIP_THRESHOLD away from the last
1334  // known good position, then it is inferred that an error occurred.
1335  // The dependency on the number of unknown elements in a row exists
1336  // because the distance to the last known good position is
1337  // automatically big if the last parsed element was big.
1338  // In both cases, each unknown element is considered equivalent to
1339  // UNKNOWN_EQUIV of skipped bytes for the check.
1340  // The whole check is only done for non-seekable output, because
1341  // in this situation skipped data can't simply be rechecked later.
1342  // This is especially important when using unkown length elements
1343  // as the check for whether a child exceeds its containing master
1344  // element is not effective in this situation.
1345  if (update_pos) {
1346  matroska->unknown_count = 0;
1347  } else {
1348  int64_t dist = length + UNKNOWN_EQUIV * matroska->unknown_count++;
1349 
1350  if (matroska->unknown_count > 3)
1351  dist += pos_alt - matroska->resync_pos;
1352 
1353  if (dist > SKIP_THRESHOLD) {
1354  av_log(matroska->ctx, AV_LOG_ERROR,
1355  "Unknown element %"PRIX32" at pos. 0x%"PRIx64" with "
1356  "length 0x%"PRIx64" considered as invalid data. Last "
1357  "known good position 0x%"PRIx64", %d unknown elements"
1358  " in a row\n", id, pos, length, matroska->resync_pos,
1359  matroska->unknown_count);
1360  return AVERROR_INVALIDDATA;
1361  }
1362  }
1363  }
1364 
1365  if (update_pos > 0) {
1366  // We have found an element that is allowed at this place
1367  // in the hierarchy and it passed all checks, so treat the beginning
1368  // of the element as the "last known good" position.
1369  matroska->resync_pos = pos;
1370  }
1371 
1372  if (!data && length != EBML_UNKNOWN_LENGTH)
1373  goto skip;
1374  }
1375 
1376  switch (syntax->type) {
1377  case EBML_UINT:
1378  res = ebml_read_uint(pb, length, data);
1379  break;
1380  case EBML_SINT:
1381  res = ebml_read_sint(pb, length, data);
1382  break;
1383  case EBML_FLOAT:
1384  res = ebml_read_float(pb, length, data);
1385  break;
1386  case EBML_STR:
1387  case EBML_UTF8:
1388  res = ebml_read_ascii(pb, length, data);
1389  break;
1390  case EBML_BIN:
1391  res = ebml_read_binary(pb, length, pos_alt, data);
1392  break;
1393  case EBML_LEVEL1:
1394  case EBML_NEST:
1395  if ((res = ebml_read_master(matroska, length, pos_alt)) < 0)
1396  return res;
1397  if (id == MATROSKA_ID_SEGMENT)
1398  matroska->segment_start = pos_alt;
1399  if (id == MATROSKA_ID_CUES)
1400  matroska->cues_parsing_deferred = 0;
1401  if (syntax->type == EBML_LEVEL1 &&
1402  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1403  if (!level1_elem->pos) {
1404  // Zero is not a valid position for a level 1 element.
1405  level1_elem->pos = pos;
1406  } else if (level1_elem->pos != pos)
1407  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1408  level1_elem->parsed = 1;
1409  }
1410  if (res = ebml_parse_nest(matroska, syntax->def.n, data))
1411  return res;
1412  break;
1413  case EBML_STOP:
1414  return 1;
1415  skip:
1416  default:
1417  if (length) {
1418  int64_t res2;
1419  if (ffio_limit(pb, length) != length) {
1420  // ffio_limit emits its own error message,
1421  // so we don't have to.
1422  return AVERROR(EIO);
1423  }
1424  if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1425  // avio_skip might take us past EOF. We check for this
1426  // by skipping only length - 1 bytes, reading a byte and
1427  // checking the error flags. This is done in order to check
1428  // that the element has been properly skipped even when
1429  // no filesize (that ffio_limit relies on) is available.
1430  avio_r8(pb);
1431  res = NEEDS_CHECKING;
1432  } else
1433  res = res2;
1434  } else
1435  res = 0;
1436  }
1437  if (res) {
1438  if (res == NEEDS_CHECKING) {
1439  if (pb->eof_reached) {
1440  if (pb->error)
1441  res = pb->error;
1442  else
1443  res = AVERROR_EOF;
1444  } else
1445  goto level_check;
1446  }
1447 
1448  if (res == AVERROR_INVALIDDATA)
1449  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1450  else if (res == AVERROR(EIO))
1451  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1452  else if (res == AVERROR_EOF) {
1453  av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1454  res = AVERROR(EIO);
1455  }
1456 
1457  return res;
1458  }
1459 
1460 level_check:
1461  if (level_check == LEVEL_ENDED && matroska->num_levels) {
1462  level = &matroska->levels[matroska->num_levels - 1];
1463  pos = avio_tell(pb);
1464 
1465  // Given that pos >= level->start no check for
1466  // level->length != EBML_UNKNOWN_LENGTH is necessary.
1467  while (matroska->num_levels && pos == level->start + level->length) {
1468  matroska->num_levels--;
1469  level--;
1470  }
1471  }
1472 
1473  return level_check;
1474 }
1475 
1476 static void ebml_free(EbmlSyntax *syntax, void *data)
1477 {
1478  int i, j;
1479  for (i = 0; syntax[i].id; i++) {
1480  void *data_off = (char *) data + syntax[i].data_offset;
1481  switch (syntax[i].type) {
1482  case EBML_STR:
1483  case EBML_UTF8:
1484  av_freep(data_off);
1485  break;
1486  case EBML_BIN:
1487  av_buffer_unref(&((EbmlBin *) data_off)->buf);
1488  break;
1489  case EBML_LEVEL1:
1490  case EBML_NEST:
1491  if (syntax[i].list_elem_size) {
1492  EbmlList *list = data_off;
1493  char *ptr = list->elem;
1494  for (j = 0; j < list->nb_elem;
1495  j++, ptr += syntax[i].list_elem_size)
1496  ebml_free(syntax[i].def.n, ptr);
1497  av_freep(&list->elem);
1498  list->nb_elem = 0;
1499  list->alloc_elem_size = 0;
1500  } else
1501  ebml_free(syntax[i].def.n, data_off);
1502  default:
1503  break;
1504  }
1505  }
1506 }
1507 
1508 /*
1509  * Autodetecting...
1510  */
1511 static int matroska_probe(const AVProbeData *p)
1512 {
1513  uint64_t total = 0;
1514  int len_mask = 0x80, size = 1, n = 1, i;
1515 
1516  /* EBML header? */
1517  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1518  return 0;
1519 
1520  /* length of header */
1521  total = p->buf[4];
1522  while (size <= 8 && !(total & len_mask)) {
1523  size++;
1524  len_mask >>= 1;
1525  }
1526  if (size > 8)
1527  return 0;
1528  total &= (len_mask - 1);
1529  while (n < size)
1530  total = (total << 8) | p->buf[4 + n++];
1531 
1532  if (total + 1 == 1ULL << (7 * size)){
1533  /* Unknown-length header - simply parse the whole buffer. */
1534  total = p->buf_size - 4 - size;
1535  } else {
1536  /* Does the probe data contain the whole header? */
1537  if (p->buf_size < 4 + size + total)
1538  return 0;
1539  }
1540 
1541  /* The header should contain a known document type. For now,
1542  * we don't parse the whole header but simply check for the
1543  * availability of that array of characters inside the header.
1544  * Not fully fool-proof, but good enough. */
1545  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1546  size_t probelen = strlen(matroska_doctypes[i]);
1547  if (total < probelen)
1548  continue;
1549  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1550  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1551  return AVPROBE_SCORE_MAX;
1552  }
1553 
1554  // probably valid EBML header but no recognized doctype
1555  return AVPROBE_SCORE_EXTENSION;
1556 }
1557 
1559  uint64_t num)
1560 {
1561  MatroskaTrack *tracks = matroska->tracks.elem;
1562  int i;
1563 
1564  for (i = 0; i < matroska->tracks.nb_elem; i++)
1565  if (tracks[i].num == num)
1566  return &tracks[i];
1567 
1568  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %"PRIu64"\n", num);
1569  return NULL;
1570 }
1571 
1572 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1573  MatroskaTrack *track)
1574 {
1575  MatroskaTrackEncoding *encodings = track->encodings.elem;
1576  uint8_t *data = *buf;
1577  int isize = *buf_size;
1578  uint8_t *pkt_data = NULL;
1579  uint8_t av_unused *newpktdata;
1580  int pkt_size = isize;
1581  int result = 0;
1582  int olen;
1583 
1584  if (pkt_size >= 10000000U)
1585  return AVERROR_INVALIDDATA;
1586 
1587  switch (encodings[0].compression.algo) {
1589  {
1590  int header_size = encodings[0].compression.settings.size;
1591  uint8_t *header = encodings[0].compression.settings.data;
1592 
1593  if (header_size && !header) {
1594  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1595  return -1;
1596  }
1597 
1598  if (!header_size)
1599  return 0;
1600 
1601  pkt_size = isize + header_size;
1602  pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1603  if (!pkt_data)
1604  return AVERROR(ENOMEM);
1605 
1606  memcpy(pkt_data, header, header_size);
1607  memcpy(pkt_data + header_size, data, isize);
1608  break;
1609  }
1610 #if CONFIG_LZO
1612  do {
1613  olen = pkt_size *= 3;
1614  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1616  if (!newpktdata) {
1617  result = AVERROR(ENOMEM);
1618  goto failed;
1619  }
1620  pkt_data = newpktdata;
1621  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1622  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1623  if (result) {
1624  result = AVERROR_INVALIDDATA;
1625  goto failed;
1626  }
1627  pkt_size -= olen;
1628  break;
1629 #endif
1630 #if CONFIG_ZLIB
1632  {
1633  z_stream zstream = { 0 };
1634  if (inflateInit(&zstream) != Z_OK)
1635  return -1;
1636  zstream.next_in = data;
1637  zstream.avail_in = isize;
1638  do {
1639  pkt_size *= 3;
1640  newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1641  if (!newpktdata) {
1642  inflateEnd(&zstream);
1643  result = AVERROR(ENOMEM);
1644  goto failed;
1645  }
1646  pkt_data = newpktdata;
1647  zstream.avail_out = pkt_size - zstream.total_out;
1648  zstream.next_out = pkt_data + zstream.total_out;
1649  result = inflate(&zstream, Z_NO_FLUSH);
1650  } while (result == Z_OK && pkt_size < 10000000);
1651  pkt_size = zstream.total_out;
1652  inflateEnd(&zstream);
1653  if (result != Z_STREAM_END) {
1654  if (result == Z_MEM_ERROR)
1655  result = AVERROR(ENOMEM);
1656  else
1657  result = AVERROR_INVALIDDATA;
1658  goto failed;
1659  }
1660  break;
1661  }
1662 #endif
1663 #if CONFIG_BZLIB
1665  {
1666  bz_stream bzstream = { 0 };
1667  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1668  return -1;
1669  bzstream.next_in = data;
1670  bzstream.avail_in = isize;
1671  do {
1672  pkt_size *= 3;
1673  newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1674  if (!newpktdata) {
1675  BZ2_bzDecompressEnd(&bzstream);
1676  result = AVERROR(ENOMEM);
1677  goto failed;
1678  }
1679  pkt_data = newpktdata;
1680  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1681  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1682  result = BZ2_bzDecompress(&bzstream);
1683  } while (result == BZ_OK && pkt_size < 10000000);
1684  pkt_size = bzstream.total_out_lo32;
1685  BZ2_bzDecompressEnd(&bzstream);
1686  if (result != BZ_STREAM_END) {
1687  if (result == BZ_MEM_ERROR)
1688  result = AVERROR(ENOMEM);
1689  else
1690  result = AVERROR_INVALIDDATA;
1691  goto failed;
1692  }
1693  break;
1694  }
1695 #endif
1696  default:
1697  return AVERROR_INVALIDDATA;
1698  }
1699 
1700  memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1701 
1702  *buf = pkt_data;
1703  *buf_size = pkt_size;
1704  return 0;
1705 
1706 failed:
1707  av_free(pkt_data);
1708  return result;
1709 }
1710 
1712  AVDictionary **metadata, char *prefix)
1713 {
1714  MatroskaTag *tags = list->elem;
1715  char key[1024];
1716  int i;
1717 
1718  for (i = 0; i < list->nb_elem; i++) {
1719  const char *lang = tags[i].lang &&
1720  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1721 
1722  if (!tags[i].name) {
1723  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1724  continue;
1725  }
1726  if (prefix)
1727  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1728  else
1729  av_strlcpy(key, tags[i].name, sizeof(key));
1730  if (tags[i].def || !lang) {
1731  av_dict_set(metadata, key, tags[i].string, 0);
1732  if (tags[i].sub.nb_elem)
1733  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1734  }
1735  if (lang) {
1736  av_strlcat(key, "-", sizeof(key));
1737  av_strlcat(key, lang, sizeof(key));
1738  av_dict_set(metadata, key, tags[i].string, 0);
1739  if (tags[i].sub.nb_elem)
1740  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1741  }
1742  }
1744 }
1745 
1747 {
1748  MatroskaDemuxContext *matroska = s->priv_data;
1749  MatroskaTags *tags = matroska->tags.elem;
1750  int i, j;
1751 
1752  for (i = 0; i < matroska->tags.nb_elem; i++) {
1753  if (tags[i].target.attachuid) {
1754  MatroskaAttachment *attachment = matroska->attachments.elem;
1755  int found = 0;
1756  for (j = 0; j < matroska->attachments.nb_elem; j++) {
1757  if (attachment[j].uid == tags[i].target.attachuid &&
1758  attachment[j].stream) {
1759  matroska_convert_tag(s, &tags[i].tag,
1760  &attachment[j].stream->metadata, NULL);
1761  found = 1;
1762  }
1763  }
1764  if (!found) {
1766  "The tags at index %d refer to a "
1767  "non-existent attachment %"PRId64".\n",
1768  i, tags[i].target.attachuid);
1769  }
1770  } else if (tags[i].target.chapteruid) {
1771  MatroskaChapter *chapter = matroska->chapters.elem;
1772  int found = 0;
1773  for (j = 0; j < matroska->chapters.nb_elem; j++) {
1774  if (chapter[j].uid == tags[i].target.chapteruid &&
1775  chapter[j].chapter) {
1776  matroska_convert_tag(s, &tags[i].tag,
1777  &chapter[j].chapter->metadata, NULL);
1778  found = 1;
1779  }
1780  }
1781  if (!found) {
1783  "The tags at index %d refer to a non-existent chapter "
1784  "%"PRId64".\n",
1785  i, tags[i].target.chapteruid);
1786  }
1787  } else if (tags[i].target.trackuid) {
1788  MatroskaTrack *track = matroska->tracks.elem;
1789  int found = 0;
1790  for (j = 0; j < matroska->tracks.nb_elem; j++) {
1791  if (track[j].uid == tags[i].target.trackuid &&
1792  track[j].stream) {
1793  matroska_convert_tag(s, &tags[i].tag,
1794  &track[j].stream->metadata, NULL);
1795  found = 1;
1796  }
1797  }
1798  if (!found) {
1800  "The tags at index %d refer to a non-existent track "
1801  "%"PRId64".\n",
1802  i, tags[i].target.trackuid);
1803  }
1804  } else {
1805  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1806  tags[i].target.type);
1807  }
1808  }
1809 }
1810 
1812  int64_t pos)
1813 {
1814  uint32_t saved_id = matroska->current_id;
1815  int64_t before_pos = avio_tell(matroska->ctx->pb);
1816  int ret = 0;
1817 
1818  /* seek */
1819  if (avio_seek(matroska->ctx->pb, pos, SEEK_SET) == pos) {
1820  /* We don't want to lose our seekhead level, so we add
1821  * a dummy. This is a crude hack. */
1822  if (matroska->num_levels == EBML_MAX_DEPTH) {
1823  av_log(matroska->ctx, AV_LOG_INFO,
1824  "Max EBML element depth (%d) reached, "
1825  "cannot parse further.\n", EBML_MAX_DEPTH);
1826  ret = AVERROR_INVALIDDATA;
1827  } else {
1828  matroska->levels[matroska->num_levels] = (MatroskaLevel) { 0, EBML_UNKNOWN_LENGTH };
1829  matroska->num_levels++;
1830  matroska->current_id = 0;
1831 
1832  ret = ebml_parse(matroska, matroska_segment, matroska);
1833  if (ret == LEVEL_ENDED) {
1834  /* This can only happen if the seek brought us beyond EOF. */
1835  ret = AVERROR_EOF;
1836  }
1837  }
1838  }
1839  /* Seek back - notice that in all instances where this is used
1840  * it is safe to set the level to 1. */
1841  matroska_reset_status(matroska, saved_id, before_pos);
1842 
1843  return ret;
1844 }
1845 
1847 {
1848  EbmlList *seekhead_list = &matroska->seekhead;
1849  int i;
1850 
1851  // we should not do any seeking in the streaming case
1852  if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1853  return;
1854 
1855  for (i = 0; i < seekhead_list->nb_elem; i++) {
1856  MatroskaSeekhead *seekheads = seekhead_list->elem;
1857  uint32_t id = seekheads[i].id;
1858  int64_t pos = seekheads[i].pos + matroska->segment_start;
1859  MatroskaLevel1Element *elem;
1860 
1861  if (id != seekheads[i].id || pos < matroska->segment_start)
1862  continue;
1863 
1864  elem = matroska_find_level1_elem(matroska, id);
1865  if (!elem || elem->parsed)
1866  continue;
1867 
1868  elem->pos = pos;
1869 
1870  // defer cues parsing until we actually need cue data.
1871  if (id == MATROSKA_ID_CUES)
1872  continue;
1873 
1874  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1875  // mark index as broken
1876  matroska->cues_parsing_deferred = -1;
1877  break;
1878  }
1879 
1880  elem->parsed = 1;
1881  }
1882 }
1883 
1885 {
1886  EbmlList *index_list;
1888  uint64_t index_scale = 1;
1889  int i, j;
1890 
1891  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1892  return;
1893 
1894  index_list = &matroska->index;
1895  index = index_list->elem;
1896  if (index_list->nb_elem < 2)
1897  return;
1898  if (index[1].time > 1E14 / matroska->time_scale) {
1899  av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1900  return;
1901  }
1902  for (i = 0; i < index_list->nb_elem; i++) {
1903  EbmlList *pos_list = &index[i].pos;
1904  MatroskaIndexPos *pos = pos_list->elem;
1905  for (j = 0; j < pos_list->nb_elem; j++) {
1906  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1907  pos[j].track);
1908  if (track && track->stream)
1909  av_add_index_entry(track->stream,
1910  pos[j].pos + matroska->segment_start,
1911  index[i].time / index_scale, 0, 0,
1913  }
1914  }
1915 }
1916 
1918  int i;
1919 
1920  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1921  return;
1922 
1923  for (i = 0; i < matroska->num_level1_elems; i++) {
1924  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1925  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1926  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1927  matroska->cues_parsing_deferred = -1;
1928  elem->parsed = 1;
1929  break;
1930  }
1931  }
1932 
1933  matroska_add_index_entries(matroska);
1934 }
1935 
1937 {
1938  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1939  int profile;
1940 
1941  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1942  if (strstr(codec_id, aac_profiles[profile]))
1943  break;
1944  return profile + 1;
1945 }
1946 
1947 static int matroska_aac_sri(int samplerate)
1948 {
1949  int sri;
1950 
1951  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1952  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1953  break;
1954  return sri;
1955 }
1956 
1957 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1958 {
1959  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1960  avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1961 }
1962 
1964  MatroskaTrack *track,
1965  int *offset)
1966 {
1967  AVStream *st = track->stream;
1968  uint8_t *p = track->codec_priv.data;
1969  int size = track->codec_priv.size;
1970 
1971  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1972  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1973  track->codec_priv.size = 0;
1974  return 0;
1975  }
1976  *offset = 8;
1977  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1978 
1979  p += track->codec_priv.size;
1980  size -= track->codec_priv.size;
1981 
1982  /* parse the remaining metadata blocks if present */
1983  while (size >= 4) {
1984  int block_last, block_type, block_size;
1985 
1986  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1987 
1988  p += 4;
1989  size -= 4;
1990  if (block_size > size)
1991  return 0;
1992 
1993  /* check for the channel mask */
1994  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1995  AVDictionary *dict = NULL;
1996  AVDictionaryEntry *chmask;
1997 
1998  ff_vorbis_comment(s, &dict, p, block_size, 0);
1999  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
2000  if (chmask) {
2001  uint64_t mask = strtol(chmask->value, NULL, 0);
2002  if (!mask || mask & ~0x3ffffULL) {
2004  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
2005  } else
2006  st->codecpar->channel_layout = mask;
2007  }
2008  av_dict_free(&dict);
2009  }
2010 
2011  p += block_size;
2012  size -= block_size;
2013  }
2014 
2015  return 0;
2016 }
2017 
2018 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
2019 {
2020  int major, minor, micro, bttb = 0;
2021 
2022  /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
2023  * this function, and fixed in 57.52 */
2024  if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, &micro) == 3)
2025  bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
2026 
2027  switch (field_order) {
2029  return AV_FIELD_PROGRESSIVE;
2031  return AV_FIELD_UNKNOWN;
2033  return AV_FIELD_TT;
2035  return AV_FIELD_BB;
2037  return bttb ? AV_FIELD_TB : AV_FIELD_BT;
2039  return bttb ? AV_FIELD_BT : AV_FIELD_TB;
2040  default:
2041  return AV_FIELD_UNKNOWN;
2042  }
2043 }
2044 
2045 static void mkv_stereo_mode_display_mul(int stereo_mode,
2046  int *h_width, int *h_height)
2047 {
2048  switch (stereo_mode) {
2054  break;
2059  *h_width = 2;
2060  break;
2065  *h_height = 2;
2066  break;
2067  }
2068 }
2069 
2070 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
2071  const MatroskaTrackVideoColor *color = track->video.color.elem;
2072  const MatroskaMasteringMeta *mastering_meta;
2073  int has_mastering_primaries, has_mastering_luminance;
2074 
2075  if (!track->video.color.nb_elem)
2076  return 0;
2077 
2078  mastering_meta = &color->mastering_meta;
2079  // Mastering primaries are CIE 1931 coords, and must be > 0.
2080  has_mastering_primaries =
2081  mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
2082  mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
2083  mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
2084  mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
2085  has_mastering_luminance = mastering_meta->max_luminance > 0;
2086 
2089  if (color->primaries != AVCOL_PRI_RESERVED &&
2090  color->primaries != AVCOL_PRI_RESERVED0)
2091  st->codecpar->color_primaries = color->primaries;
2095  if (color->range != AVCOL_RANGE_UNSPECIFIED &&
2096  color->range <= AVCOL_RANGE_JPEG)
2097  st->codecpar->color_range = color->range;
2102  st->codecpar->chroma_location =
2104  (color->chroma_siting_vert - 1) << 7);
2105  }
2106  if (color->max_cll && color->max_fall) {
2107  size_t size = 0;
2108  int ret;
2110  if (!metadata)
2111  return AVERROR(ENOMEM);
2113  (uint8_t *)metadata, size);
2114  if (ret < 0) {
2115  av_freep(&metadata);
2116  return ret;
2117  }
2118  metadata->MaxCLL = color->max_cll;
2119  metadata->MaxFALL = color->max_fall;
2120  }
2121 
2122  if (has_mastering_primaries || has_mastering_luminance) {
2123  // Use similar rationals as other standards.
2124  const int chroma_den = 50000;
2125  const int luma_den = 10000;
2126  AVMasteringDisplayMetadata *metadata =
2129  sizeof(AVMasteringDisplayMetadata));
2130  if (!metadata) {
2131  return AVERROR(ENOMEM);
2132  }
2133  memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
2134  if (has_mastering_primaries) {
2135  metadata->display_primaries[0][0] = av_make_q(
2136  round(mastering_meta->r_x * chroma_den), chroma_den);
2137  metadata->display_primaries[0][1] = av_make_q(
2138  round(mastering_meta->r_y * chroma_den), chroma_den);
2139  metadata->display_primaries[1][0] = av_make_q(
2140  round(mastering_meta->g_x * chroma_den), chroma_den);
2141  metadata->display_primaries[1][1] = av_make_q(
2142  round(mastering_meta->g_y * chroma_den), chroma_den);
2143  metadata->display_primaries[2][0] = av_make_q(
2144  round(mastering_meta->b_x * chroma_den), chroma_den);
2145  metadata->display_primaries[2][1] = av_make_q(
2146  round(mastering_meta->b_y * chroma_den), chroma_den);
2147  metadata->white_point[0] = av_make_q(
2148  round(mastering_meta->white_x * chroma_den), chroma_den);
2149  metadata->white_point[1] = av_make_q(
2150  round(mastering_meta->white_y * chroma_den), chroma_den);
2151  metadata->has_primaries = 1;
2152  }
2153  if (has_mastering_luminance) {
2154  metadata->max_luminance = av_make_q(
2155  round(mastering_meta->max_luminance * luma_den), luma_den);
2156  metadata->min_luminance = av_make_q(
2157  round(mastering_meta->min_luminance * luma_den), luma_den);
2158  metadata->has_luminance = 1;
2159  }
2160  }
2161  return 0;
2162 }
2163 
2164 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
2165  AVSphericalMapping *spherical;
2166  enum AVSphericalProjection projection;
2167  size_t spherical_size;
2168  uint32_t l = 0, t = 0, r = 0, b = 0;
2169  uint32_t padding = 0;
2170  int ret;
2171  GetByteContext gb;
2172 
2174  track->video.projection.private.size);
2175 
2176  if (bytestream2_get_byte(&gb) != 0) {
2177  av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
2178  return 0;
2179  }
2180 
2181  bytestream2_skip(&gb, 3); // flags
2182 
2183  switch (track->video.projection.type) {
2185  if (track->video.projection.private.size == 20) {
2186  t = bytestream2_get_be32(&gb);
2187  b = bytestream2_get_be32(&gb);
2188  l = bytestream2_get_be32(&gb);
2189  r = bytestream2_get_be32(&gb);
2190 
2191  if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2193  "Invalid bounding rectangle coordinates "
2194  "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2195  l, t, r, b);
2196  return AVERROR_INVALIDDATA;
2197  }
2198  } else if (track->video.projection.private.size != 0) {
2199  av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2200  return AVERROR_INVALIDDATA;
2201  }
2202 
2203  if (l || t || r || b)
2204  projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2205  else
2206  projection = AV_SPHERICAL_EQUIRECTANGULAR;
2207  break;
2209  if (track->video.projection.private.size < 4) {
2210  av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2211  return AVERROR_INVALIDDATA;
2212  } else if (track->video.projection.private.size == 12) {
2213  uint32_t layout = bytestream2_get_be32(&gb);
2214  if (layout) {
2216  "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2217  return 0;
2218  }
2219  projection = AV_SPHERICAL_CUBEMAP;
2220  padding = bytestream2_get_be32(&gb);
2221  } else {
2222  av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2223  return AVERROR_INVALIDDATA;
2224  }
2225  break;
2227  /* No Spherical metadata */
2228  return 0;
2229  default:
2231  "Unknown spherical metadata type %"PRIu64"\n",
2232  track->video.projection.type);
2233  return 0;
2234  }
2235 
2236  spherical = av_spherical_alloc(&spherical_size);
2237  if (!spherical)
2238  return AVERROR(ENOMEM);
2239 
2240  spherical->projection = projection;
2241 
2242  spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2243  spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2244  spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2245 
2246  spherical->padding = padding;
2247 
2248  spherical->bound_left = l;
2249  spherical->bound_top = t;
2250  spherical->bound_right = r;
2251  spherical->bound_bottom = b;
2252 
2253  ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2254  spherical_size);
2255  if (ret < 0) {
2256  av_freep(&spherical);
2257  return ret;
2258  }
2259 
2260  return 0;
2261 }
2262 
2263 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2264 {
2265  const AVCodecTag *codec_tags;
2266 
2267  codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2269 
2270  /* Normalize noncompliant private data that starts with the fourcc
2271  * by expanding/shifting the data by 4 bytes and storing the data
2272  * size at the start. */
2273  if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2274  int ret = av_buffer_realloc(&track->codec_priv.buf,
2276  if (ret < 0)
2277  return ret;
2278 
2279  track->codec_priv.data = track->codec_priv.buf->data;
2280  memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2281  track->codec_priv.size += 4;
2282  AV_WB32(track->codec_priv.data, track->codec_priv.size);
2283  }
2284 
2285  *fourcc = AV_RL32(track->codec_priv.data + 4);
2286  *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2287 
2288  return 0;
2289 }
2290 
2292 {
2293  MatroskaDemuxContext *matroska = s->priv_data;
2294  MatroskaTrack *tracks = matroska->tracks.elem;
2295  AVStream *st;
2296  int i, j, ret;
2297  int k;
2298 
2299  for (i = 0; i < matroska->tracks.nb_elem; i++) {
2300  MatroskaTrack *track = &tracks[i];
2302  EbmlList *encodings_list = &track->encodings;
2303  MatroskaTrackEncoding *encodings = encodings_list->elem;
2304  uint8_t *extradata = NULL;
2305  int extradata_size = 0;
2306  int extradata_offset = 0;
2307  uint32_t fourcc = 0;
2308  AVIOContext b;
2309  char* key_id_base64 = NULL;
2310  int bit_depth = -1;
2311 
2312  /* Apply some sanity checks. */
2313  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2314  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2315  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2316  track->type != MATROSKA_TRACK_TYPE_METADATA) {
2317  av_log(matroska->ctx, AV_LOG_INFO,
2318  "Unknown or unsupported track type %"PRIu64"\n",
2319  track->type);
2320  continue;
2321  }
2322  if (!track->codec_id)
2323  continue;
2324 
2325  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2326  isnan(track->audio.samplerate)) {
2327  av_log(matroska->ctx, AV_LOG_WARNING,
2328  "Invalid sample rate %f, defaulting to 8000 instead.\n",
2329  track->audio.samplerate);
2330  track->audio.samplerate = 8000;
2331  }
2332 
2333  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2334  if (!track->default_duration && track->video.frame_rate > 0) {
2335  double default_duration = 1000000000 / track->video.frame_rate;
2336  if (default_duration > UINT64_MAX || default_duration < 0) {
2337  av_log(matroska->ctx, AV_LOG_WARNING,
2338  "Invalid frame rate %e. Cannot calculate default duration.\n",
2339  track->video.frame_rate);
2340  } else {
2341  track->default_duration = default_duration;
2342  }
2343  }
2344  if (track->video.display_width == -1)
2345  track->video.display_width = track->video.pixel_width;
2346  if (track->video.display_height == -1)
2347  track->video.display_height = track->video.pixel_height;
2348  if (track->video.color_space.size == 4)
2349  fourcc = AV_RL32(track->video.color_space.data);
2350  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2351  if (!track->audio.out_samplerate)
2352  track->audio.out_samplerate = track->audio.samplerate;
2353  }
2354  if (encodings_list->nb_elem > 1) {
2355  av_log(matroska->ctx, AV_LOG_ERROR,
2356  "Multiple combined encodings not supported");
2357  } else if (encodings_list->nb_elem == 1) {
2358  if (encodings[0].type) {
2359  if (encodings[0].encryption.key_id.size > 0) {
2360  /* Save the encryption key id to be stored later as a
2361  metadata tag. */
2362  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2363  key_id_base64 = av_malloc(b64_size);
2364  if (key_id_base64 == NULL)
2365  return AVERROR(ENOMEM);
2366 
2367  av_base64_encode(key_id_base64, b64_size,
2368  encodings[0].encryption.key_id.data,
2369  encodings[0].encryption.key_id.size);
2370  } else {
2371  encodings[0].scope = 0;
2372  av_log(matroska->ctx, AV_LOG_ERROR,
2373  "Unsupported encoding type");
2374  }
2375  } else if (
2376 #if CONFIG_ZLIB
2377  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2378 #endif
2379 #if CONFIG_BZLIB
2381 #endif
2382 #if CONFIG_LZO
2384 #endif
2386  encodings[0].scope = 0;
2387  av_log(matroska->ctx, AV_LOG_ERROR,
2388  "Unsupported encoding type");
2389  } else if (track->codec_priv.size && encodings[0].scope & 2) {
2390  uint8_t *codec_priv = track->codec_priv.data;
2391  int ret = matroska_decode_buffer(&track->codec_priv.data,
2392  &track->codec_priv.size,
2393  track);
2394  if (ret < 0) {
2395  track->codec_priv.data = NULL;
2396  track->codec_priv.size = 0;
2397  av_log(matroska->ctx, AV_LOG_ERROR,
2398  "Failed to decode codec private data\n");
2399  }
2400 
2401  if (codec_priv != track->codec_priv.data) {
2402  av_buffer_unref(&track->codec_priv.buf);
2403  if (track->codec_priv.data) {
2404  track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2406  NULL, NULL, 0);
2407  if (!track->codec_priv.buf) {
2408  av_freep(&track->codec_priv.data);
2409  track->codec_priv.size = 0;
2410  return AVERROR(ENOMEM);
2411  }
2412  }
2413  }
2414  }
2415  }
2416 
2417  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2418  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2419  strlen(ff_mkv_codec_tags[j].str))) {
2420  codec_id = ff_mkv_codec_tags[j].id;
2421  break;
2422  }
2423  }
2424 
2425  st = track->stream = avformat_new_stream(s, NULL);
2426  if (!st) {
2427  av_free(key_id_base64);
2428  return AVERROR(ENOMEM);
2429  }
2430 
2431  if (key_id_base64) {
2432  /* export encryption key id as base64 metadata tag */
2433  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2434  av_freep(&key_id_base64);
2435  }
2436 
2437  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2438  track->codec_priv.size >= 40 &&
2439  track->codec_priv.data) {
2440  track->ms_compat = 1;
2441  bit_depth = AV_RL16(track->codec_priv.data + 14);
2442  fourcc = AV_RL32(track->codec_priv.data + 16);
2444  fourcc);
2445  if (!codec_id)
2447  fourcc);
2448  extradata_offset = 40;
2449  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2450  track->codec_priv.size >= 14 &&
2451  track->codec_priv.data) {
2452  int ret;
2453  ffio_init_context(&b, track->codec_priv.data,
2454  track->codec_priv.size,
2455  0, NULL, NULL, NULL, NULL);
2456  ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2457  if (ret < 0)
2458  return ret;
2459  codec_id = st->codecpar->codec_id;
2460  fourcc = st->codecpar->codec_tag;
2461  extradata_offset = FFMIN(track->codec_priv.size, 18);
2462  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2463  /* Normally 36, but allow noncompliant private data */
2464  && (track->codec_priv.size >= 32)
2465  && (track->codec_priv.data)) {
2466  uint16_t sample_size;
2467  int ret = get_qt_codec(track, &fourcc, &codec_id);
2468  if (ret < 0)
2469  return ret;
2470  sample_size = AV_RB16(track->codec_priv.data + 26);
2471  if (fourcc == 0) {
2472  if (sample_size == 8) {
2473  fourcc = MKTAG('r','a','w',' ');
2474  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2475  } else if (sample_size == 16) {
2476  fourcc = MKTAG('t','w','o','s');
2477  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2478  }
2479  }
2480  if ((fourcc == MKTAG('t','w','o','s') ||
2481  fourcc == MKTAG('s','o','w','t')) &&
2482  sample_size == 8)
2483  codec_id = AV_CODEC_ID_PCM_S8;
2484  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2485  (track->codec_priv.size >= 21) &&
2486  (track->codec_priv.data)) {
2487  int ret = get_qt_codec(track, &fourcc, &codec_id);
2488  if (ret < 0)
2489  return ret;
2490  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2491  fourcc = MKTAG('S','V','Q','3');
2492  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2493  }
2494  if (codec_id == AV_CODEC_ID_NONE)
2495  av_log(matroska->ctx, AV_LOG_ERROR,
2496  "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2497  if (track->codec_priv.size >= 86) {
2498  bit_depth = AV_RB16(track->codec_priv.data + 82);
2499  ffio_init_context(&b, track->codec_priv.data,
2500  track->codec_priv.size,
2501  0, NULL, NULL, NULL, NULL);
2502  if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2503  bit_depth &= 0x1F;
2504  track->has_palette = 1;
2505  }
2506  }
2507  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2508  switch (track->audio.bitdepth) {
2509  case 8:
2510  codec_id = AV_CODEC_ID_PCM_U8;
2511  break;
2512  case 24:
2513  codec_id = AV_CODEC_ID_PCM_S24BE;
2514  break;
2515  case 32:
2516  codec_id = AV_CODEC_ID_PCM_S32BE;
2517  break;
2518  }
2519  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2520  switch (track->audio.bitdepth) {
2521  case 8:
2522  codec_id = AV_CODEC_ID_PCM_U8;
2523  break;
2524  case 24:
2525  codec_id = AV_CODEC_ID_PCM_S24LE;
2526  break;
2527  case 32:
2528  codec_id = AV_CODEC_ID_PCM_S32LE;
2529  break;
2530  }
2531  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2532  track->audio.bitdepth == 64) {
2533  codec_id = AV_CODEC_ID_PCM_F64LE;
2534  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2535  int profile = matroska_aac_profile(track->codec_id);
2536  int sri = matroska_aac_sri(track->audio.samplerate);
2537  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2538  if (!extradata)
2539  return AVERROR(ENOMEM);
2540  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2541  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2542  if (strstr(track->codec_id, "SBR")) {
2543  sri = matroska_aac_sri(track->audio.out_samplerate);
2544  extradata[2] = 0x56;
2545  extradata[3] = 0xE5;
2546  extradata[4] = 0x80 | (sri << 3);
2547  extradata_size = 5;
2548  } else
2549  extradata_size = 2;
2550  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2551  /* Only ALAC's magic cookie is stored in Matroska's track headers.
2552  * Create the "atom size", "tag", and "tag version" fields the
2553  * decoder expects manually. */
2554  extradata_size = 12 + track->codec_priv.size;
2555  extradata = av_mallocz(extradata_size +
2557  if (!extradata)
2558  return AVERROR(ENOMEM);
2559  AV_WB32(extradata, extradata_size);
2560  memcpy(&extradata[4], "alac", 4);
2561  AV_WB32(&extradata[8], 0);
2562  memcpy(&extradata[12], track->codec_priv.data,
2563  track->codec_priv.size);
2564  } else if (codec_id == AV_CODEC_ID_TTA) {
2565  if (track->audio.channels > UINT16_MAX ||
2566  track->audio.bitdepth > UINT16_MAX) {
2567  av_log(matroska->ctx, AV_LOG_WARNING,
2568  "Too large audio channel number %"PRIu64
2569  " or bitdepth %"PRIu64". Skipping track.\n",
2570  track->audio.channels, track->audio.bitdepth);
2571  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2572  return AVERROR_INVALIDDATA;
2573  else
2574  continue;
2575  }
2576  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2577  return AVERROR_INVALIDDATA;
2578  extradata_size = 30;
2579  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2580  if (!extradata)
2581  return AVERROR(ENOMEM);
2582  ffio_init_context(&b, extradata, extradata_size, 1,
2583  NULL, NULL, NULL, NULL);
2584  avio_write(&b, "TTA1", 4);
2585  avio_wl16(&b, 1);
2586  avio_wl16(&b, track->audio.channels);
2587  avio_wl16(&b, track->audio.bitdepth);
2588  avio_wl32(&b, track->audio.out_samplerate);
2589  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2590  track->audio.out_samplerate,
2591  AV_TIME_BASE * 1000));
2592  } else if (codec_id == AV_CODEC_ID_RV10 ||
2593  codec_id == AV_CODEC_ID_RV20 ||
2594  codec_id == AV_CODEC_ID_RV30 ||
2595  codec_id == AV_CODEC_ID_RV40) {
2596  extradata_offset = 26;
2597  } else if (codec_id == AV_CODEC_ID_RA_144) {
2598  track->audio.out_samplerate = 8000;
2599  track->audio.channels = 1;
2600  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2601  codec_id == AV_CODEC_ID_COOK ||
2602  codec_id == AV_CODEC_ID_ATRAC3 ||
2603  codec_id == AV_CODEC_ID_SIPR)
2604  && track->codec_priv.data) {
2605  int flavor;
2606 
2607  ffio_init_context(&b, track->codec_priv.data,
2608  track->codec_priv.size,
2609  0, NULL, NULL, NULL, NULL);
2610  avio_skip(&b, 22);
2611  flavor = avio_rb16(&b);
2612  track->audio.coded_framesize = avio_rb32(&b);
2613  avio_skip(&b, 12);
2614  track->audio.sub_packet_h = avio_rb16(&b);
2615  track->audio.frame_size = avio_rb16(&b);
2616  track->audio.sub_packet_size = avio_rb16(&b);
2617  if (flavor < 0 ||
2618  track->audio.coded_framesize <= 0 ||
2619  track->audio.sub_packet_h <= 0 ||
2620  track->audio.frame_size <= 0 ||
2621  track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2622  return AVERROR_INVALIDDATA;
2623  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2624  track->audio.frame_size);
2625  if (!track->audio.buf)
2626  return AVERROR(ENOMEM);
2627  if (codec_id == AV_CODEC_ID_RA_288) {
2628  st->codecpar->block_align = track->audio.coded_framesize;
2629  track->codec_priv.size = 0;
2630  } else {
2631  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2632  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2633  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2634  st->codecpar->bit_rate = sipr_bit_rate[flavor];
2635  }
2636  st->codecpar->block_align = track->audio.sub_packet_size;
2637  extradata_offset = 78;
2638  }
2639  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2640  ret = matroska_parse_flac(s, track, &extradata_offset);
2641  if (ret < 0)
2642  return ret;
2643  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2644  fourcc = AV_RL32(track->codec_priv.data);
2645  } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2646  /* we don't need any value stored in CodecPrivate.
2647  make sure that it's not exported as extradata. */
2648  track->codec_priv.size = 0;
2649  } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2650  /* For now, propagate only the OBUs, if any. Once libavcodec is
2651  updated to handle isobmff style extradata this can be removed. */
2652  extradata_offset = 4;
2653  }
2654  track->codec_priv.size -= extradata_offset;
2655 
2656  if (codec_id == AV_CODEC_ID_NONE)
2657  av_log(matroska->ctx, AV_LOG_INFO,
2658  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2659 
2660  if (track->time_scale < 0.01)
2661  track->time_scale = 1.0;
2662  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2663  1000 * 1000 * 1000); /* 64 bit pts in ns */
2664 
2665  /* convert the delay from ns to the track timebase */
2667  (AVRational){ 1, 1000000000 },
2668  st->time_base);
2669 
2670  st->codecpar->codec_id = codec_id;
2671 
2672  if (strcmp(track->language, "und"))
2673  av_dict_set(&st->metadata, "language", track->language, 0);
2674  av_dict_set(&st->metadata, "title", track->name, 0);
2675 
2676  if (track->flag_default)
2678  if (track->flag_forced)
2680 
2681  if (!st->codecpar->extradata) {
2682  if (extradata) {
2683  st->codecpar->extradata = extradata;
2684  st->codecpar->extradata_size = extradata_size;
2685  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2686  if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2687  return AVERROR(ENOMEM);
2688  memcpy(st->codecpar->extradata,
2689  track->codec_priv.data + extradata_offset,
2690  track->codec_priv.size);
2691  }
2692  }
2693 
2694  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2696  int display_width_mul = 1;
2697  int display_height_mul = 1;
2698 
2700  st->codecpar->codec_tag = fourcc;
2701  if (bit_depth >= 0)
2703  st->codecpar->width = track->video.pixel_width;
2704  st->codecpar->height = track->video.pixel_height;
2705 
2707  st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2710 
2712  mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2713 
2716  &st->sample_aspect_ratio.den,
2717  st->codecpar->height * track->video.display_width * display_width_mul,
2718  st->codecpar->width * track->video.display_height * display_height_mul,
2719  255);
2720  }
2721  if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2723 
2724  if (track->default_duration) {
2726  1000000000, track->default_duration, 30000);
2727 #if FF_API_R_FRAME_RATE
2728  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2729  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2730  st->r_frame_rate = st->avg_frame_rate;
2731 #endif
2732  }
2733 
2734  /* export stereo mode flag as metadata tag */
2736  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2737 
2738  /* export alpha mode flag as metadata tag */
2739  if (track->video.alpha_mode)
2740  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2741 
2742  /* if we have virtual track, mark the real tracks */
2743  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2744  char buf[32];
2745  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2746  continue;
2747  snprintf(buf, sizeof(buf), "%s_%d",
2748  ff_matroska_video_stereo_plane[planes[j].type], i);
2749  for (k=0; k < matroska->tracks.nb_elem; k++)
2750  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2751  av_dict_set(&tracks[k].stream->metadata,
2752  "stereo_mode", buf, 0);
2753  break;
2754  }
2755  }
2756  // add stream level stereo3d side data if it is a supported format
2758  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2759  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2760  if (ret < 0)
2761  return ret;
2762  }
2763 
2764  ret = mkv_parse_video_color(st, track);
2765  if (ret < 0)
2766  return ret;
2767  ret = mkv_parse_video_projection(st, track);
2768  if (ret < 0)
2769  return ret;
2770  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2772  st->codecpar->codec_tag = fourcc;
2773  st->codecpar->sample_rate = track->audio.out_samplerate;
2774  st->codecpar->channels = track->audio.channels;
2775  if (!st->codecpar->bits_per_coded_sample)
2777  if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2778  st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2781  else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2783  if (track->codec_delay > 0) {
2785  (AVRational){1, 1000000000},
2786  (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2787  48000 : st->codecpar->sample_rate});
2788  }
2789  if (track->seek_preroll > 0) {
2791  (AVRational){1, 1000000000},
2792  (AVRational){1, st->codecpar->sample_rate});
2793  }
2794  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2796 
2797  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2799  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2801  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2803  }
2804  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2806  }
2807  }
2808 
2809  return 0;
2810 }
2811 
2813 {
2814  MatroskaDemuxContext *matroska = s->priv_data;
2815  EbmlList *attachments_list = &matroska->attachments;
2816  EbmlList *chapters_list = &matroska->chapters;
2817  MatroskaAttachment *attachments;
2818  MatroskaChapter *chapters;
2819  uint64_t max_start = 0;
2820  int64_t pos;
2821  Ebml ebml = { 0 };
2822  int i, j, res;
2823 
2824  matroska->ctx = s;
2825  matroska->cues_parsing_deferred = 1;
2826 
2827  /* First read the EBML header. */
2828  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2829  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2830  ebml_free(ebml_syntax, &ebml);
2831  return AVERROR_INVALIDDATA;
2832  }
2833  if (ebml.version > EBML_VERSION ||
2834  ebml.max_size > sizeof(uint64_t) ||
2835  ebml.id_length > sizeof(uint32_t) ||
2836  ebml.doctype_version > 3) {
2838  "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2839  ebml.version, ebml.doctype, ebml.doctype_version);
2840  ebml_free(ebml_syntax, &ebml);
2841  return AVERROR_PATCHWELCOME;
2842  } else if (ebml.doctype_version == 3) {
2843  av_log(matroska->ctx, AV_LOG_WARNING,
2844  "EBML header using unsupported features\n"
2845  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2846  ebml.version, ebml.doctype, ebml.doctype_version);
2847  }
2848  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2849  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2850  break;
2851  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2852  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2853  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2854  ebml_free(ebml_syntax, &ebml);
2855  return AVERROR_INVALIDDATA;
2856  }
2857  }
2858  ebml_free(ebml_syntax, &ebml);
2859 
2860  /* The next thing is a segment. */
2861  pos = avio_tell(matroska->ctx->pb);
2862  res = ebml_parse(matroska, matroska_segments, matroska);
2863  // Try resyncing until we find an EBML_STOP type element.
2864  while (res != 1) {
2865  res = matroska_resync(matroska, pos);
2866  if (res < 0)
2867  goto fail;
2868  pos = avio_tell(matroska->ctx->pb);
2869  res = ebml_parse(matroska, matroska_segment, matroska);
2870  }
2871  /* Set data_offset as it might be needed later by seek_frame_generic. */
2872  if (matroska->current_id == MATROSKA_ID_CLUSTER)
2873  s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2874  matroska_execute_seekhead(matroska);
2875 
2876  if (!matroska->time_scale)
2877  matroska->time_scale = 1000000;
2878  if (matroska->duration)
2879  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2880  1000 / AV_TIME_BASE;
2881  av_dict_set(&s->metadata, "title", matroska->title, 0);
2882  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2883 
2884  if (matroska->date_utc.size == 8)
2886 
2887  res = matroska_parse_tracks(s);
2888  if (res < 0)
2889  goto fail;
2890 
2891  attachments = attachments_list->elem;
2892  for (j = 0; j < attachments_list->nb_elem; j++) {
2893  if (!(attachments[j].filename && attachments[j].mime &&
2894  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2895  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2896  } else {
2897  AVStream *st = avformat_new_stream(s, NULL);
2898  if (!st)
2899  break;
2900  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2901  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2903 
2904  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2905  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2906  strlen(ff_mkv_image_mime_tags[i].str))) {
2908  break;
2909  }
2910  }
2911 
2912  attachments[j].stream = st;
2913 
2914  if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2915  AVPacket *pkt = &st->attached_pic;
2916 
2919 
2920  av_init_packet(pkt);
2921  pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2922  if (!pkt->buf)
2923  return AVERROR(ENOMEM);
2924  pkt->data = attachments[j].bin.data;
2925  pkt->size = attachments[j].bin.size;
2926  pkt->stream_index = st->index;
2927  pkt->flags |= AV_PKT_FLAG_KEY;
2928  } else {
2930  if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2931  break;
2932  memcpy(st->codecpar->extradata, attachments[j].bin.data,
2933  attachments[j].bin.size);
2934 
2935  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2936  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2937  strlen(ff_mkv_mime_tags[i].str))) {
2939  break;
2940  }
2941  }
2942  }
2943  }
2944  }
2945 
2946  chapters = chapters_list->elem;
2947  for (i = 0; i < chapters_list->nb_elem; i++)
2948  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2949  (max_start == 0 || chapters[i].start > max_start)) {
2950  chapters[i].chapter =
2951  avpriv_new_chapter(s, chapters[i].uid,
2952  (AVRational) { 1, 1000000000 },
2953  chapters[i].start, chapters[i].end,
2954  chapters[i].title);
2955  if (chapters[i].chapter) {
2956  av_dict_set(&chapters[i].chapter->metadata,
2957  "title", chapters[i].title, 0);
2958  }
2959  max_start = chapters[i].start;
2960  }
2961 
2962  matroska_add_index_entries(matroska);
2963 
2965 
2966  return 0;
2967 fail:
2969  return res;
2970 }
2971 
2972 /*
2973  * Put one packet in an application-supplied AVPacket struct.
2974  * Returns 0 on success or -1 on failure.
2975  */
2977  AVPacket *pkt)
2978 {
2979  if (matroska->queue) {
2980  MatroskaTrack *tracks = matroska->tracks.elem;
2981  MatroskaTrack *track;
2982 
2983  ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2984  track = &tracks[pkt->stream_index];
2985  if (track->has_palette) {
2987  if (!pal) {
2988  av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2989  } else {
2990  memcpy(pal, track->palette, AVPALETTE_SIZE);
2991  }
2992  track->has_palette = 0;
2993  }
2994  return 0;
2995  }
2996 
2997  return -1;
2998 }
2999 
3000 /*
3001  * Free all packets in our internal queue.
3002  */
3004 {
3005  ff_packet_list_free(&matroska->queue, &matroska->queue_end);
3006 }
3007 
3009  int *buf_size, int type,
3010  uint32_t **lace_buf, int *laces)
3011 {
3012  int res = 0, n, size = *buf_size;
3013  uint8_t *data = *buf;
3014  uint32_t *lace_size;
3015 
3016  if (!type) {
3017  *laces = 1;
3018  *lace_buf = av_malloc(sizeof(**lace_buf));
3019  if (!*lace_buf)
3020  return AVERROR(ENOMEM);
3021 
3022  *lace_buf[0] = size;
3023  return 0;
3024  }
3025 
3026  if (size <= 0)
3027  return AVERROR_INVALIDDATA;
3028 
3029  *laces = *data + 1;
3030  data += 1;
3031  size -= 1;
3032  lace_size = av_malloc_array(*laces, sizeof(*lace_size));
3033  if (!lace_size)
3034  return AVERROR(ENOMEM);
3035 
3036  switch (type) {
3037  case 0x1: /* Xiph lacing */
3038  {
3039  uint8_t temp;
3040  uint32_t total = 0;
3041  for (n = 0; res == 0 && n < *laces - 1; n++) {
3042  lace_size[n] = 0;
3043 
3044  while (1) {
3045  if (size <= total) {
3046  res = AVERROR_INVALIDDATA;
3047  break;
3048  }
3049  temp = *data;
3050  total += temp;
3051  lace_size[n] += temp;
3052  data += 1;
3053  size -= 1;
3054  if (temp != 0xff)
3055  break;
3056  }
3057  }
3058  if (size < total) {
3059  res = AVERROR_INVALIDDATA;
3060  break;
3061  }
3062 
3063  lace_size[n] = size - total;
3064  break;
3065  }
3066 
3067  case 0x2: /* fixed-size lacing */
3068  if (size % (*laces)) {
3069  res = AVERROR_INVALIDDATA;
3070  break;
3071  }
3072  for (n = 0; n < *laces; n++)
3073  lace_size[n] = size / *laces;
3074  break;
3075 
3076  case 0x3: /* EBML lacing */
3077  {
3078  uint64_t num;
3079  uint64_t total;
3080  n = matroska_ebmlnum_uint(matroska, data, size, &num);
3081  if (n < 0 || num > INT_MAX) {
3082  av_log(matroska->ctx, AV_LOG_INFO,
3083  "EBML block data error\n");
3084  res = n<0 ? n : AVERROR_INVALIDDATA;
3085  break;
3086  }
3087  data += n;
3088  size -= n;
3089  total = lace_size[0] = num;
3090  for (n = 1; res == 0 && n < *laces - 1; n++) {
3091  int64_t snum;
3092  int r;
3093  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
3094  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
3095  av_log(matroska->ctx, AV_LOG_INFO,
3096  "EBML block data error\n");
3097  res = r<0 ? r : AVERROR_INVALIDDATA;
3098  break;
3099  }
3100  data += r;
3101  size -= r;
3102  lace_size[n] = lace_size[n - 1] + snum;
3103  total += lace_size[n];
3104  }
3105  if (size < total) {
3106  res = AVERROR_INVALIDDATA;
3107  break;
3108  }
3109  lace_size[*laces - 1] = size - total;
3110  break;
3111  }
3112  }
3113 
3114  *buf = data;
3115  *lace_buf = lace_size;
3116  *buf_size = size;
3117 
3118  return res;
3119 }
3120 
3122  MatroskaTrack *track, AVStream *st,
3123  uint8_t *data, int size, uint64_t timecode,
3124  int64_t pos)
3125 {
3126  int a = st->codecpar->block_align;
3127  int sps = track->audio.sub_packet_size;
3128  int cfs = track->audio.coded_framesize;
3129  int h = track->audio.sub_packet_h;
3130  int y = track->audio.sub_packet_cnt;
3131  int w = track->audio.frame_size;
3132  int x;
3133 
3134  if (!track->audio.pkt_cnt) {
3135  if (track->audio.sub_packet_cnt == 0)
3136  track->audio.buf_timecode = timecode;
3137  if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
3138  if (size < cfs * h / 2) {
3139  av_log(matroska->ctx, AV_LOG_ERROR,
3140  "Corrupt int4 RM-style audio packet size\n");
3141  return AVERROR_INVALIDDATA;
3142  }
3143  for (x = 0; x < h / 2; x++)
3144  memcpy(track->audio.buf + x * 2 * w + y * cfs,
3145  data + x * cfs, cfs);
3146  } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3147  if (size < w) {
3148  av_log(matroska->ctx, AV_LOG_ERROR,
3149  "Corrupt sipr RM-style audio packet size\n");
3150  return AVERROR_INVALIDDATA;
3151  }
3152  memcpy(track->audio.buf + y * w, data, w);
3153  } else {
3154  if (size < sps * w / sps || h<=0 || w%sps) {
3155  av_log(matroska->ctx, AV_LOG_ERROR,
3156  "Corrupt generic RM-style audio packet size\n");
3157  return AVERROR_INVALIDDATA;
3158  }
3159  for (x = 0; x < w / sps; x++)
3160  memcpy(track->audio.buf +
3161  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3162  data + x * sps, sps);
3163  }
3164 
3165  if (++track->audio.sub_packet_cnt >= h) {
3166  if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3167  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3168  track->audio.sub_packet_cnt = 0;
3169  track->audio.pkt_cnt = h * w / a;
3170  }
3171  }
3172 
3173  while (track->audio.pkt_cnt) {
3174  int ret;
3175  AVPacket pktl, *pkt = &pktl;
3176 
3177  ret = av_new_packet(pkt, a);
3178  if (ret < 0) {
3179  return ret;
3180  }
3181  memcpy(pkt->data,
3182  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3183  a);
3184  pkt->pts = track->audio.buf_timecode;
3186  pkt->pos = pos;
3187  pkt->stream_index = st->index;
3188  ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3189  if (ret < 0) {
3190  av_packet_unref(pkt);
3191  return AVERROR(ENOMEM);
3192  }
3193  }
3194 
3195  return 0;
3196 }
3197 
3198 /* reconstruct full wavpack blocks from mangled matroska ones */
3200  uint8_t **pdst, int *size)
3201 {
3202  uint8_t *dst = NULL;
3203  int dstlen = 0;
3204  int srclen = *size;
3205  uint32_t samples;
3206  uint16_t ver;
3207  int ret, offset = 0;
3208 
3209  if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3210  return AVERROR_INVALIDDATA;
3211 
3212  ver = AV_RL16(track->stream->codecpar->extradata);
3213 
3214  samples = AV_RL32(src);
3215  src += 4;
3216  srclen -= 4;
3217 
3218  while (srclen >= 8) {
3219  int multiblock;
3220  uint32_t blocksize;
3221  uint8_t *tmp;
3222 
3223  uint32_t flags = AV_RL32(src);
3224  uint32_t crc = AV_RL32(src + 4);
3225  src += 8;
3226  srclen -= 8;
3227 
3228  multiblock = (flags & 0x1800) != 0x1800;
3229  if (multiblock) {
3230  if (srclen < 4) {
3231  ret = AVERROR_INVALIDDATA;
3232  goto fail;
3233  }
3234  blocksize = AV_RL32(src);
3235  src += 4;
3236  srclen -= 4;
3237  } else
3238  blocksize = srclen;
3239 
3240  if (blocksize > srclen) {
3241  ret = AVERROR_INVALIDDATA;
3242  goto fail;
3243  }
3244 
3245  tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3246  if (!tmp) {
3247  ret = AVERROR(ENOMEM);
3248  goto fail;
3249  }
3250  dst = tmp;
3251  dstlen += blocksize + 32;
3252 
3253  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3254  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3255  AV_WL16(dst + offset + 8, ver); // version
3256  AV_WL16(dst + offset + 10, 0); // track/index_no
3257  AV_WL32(dst + offset + 12, 0); // total samples
3258  AV_WL32(dst + offset + 16, 0); // block index
3259  AV_WL32(dst + offset + 20, samples); // number of samples
3260  AV_WL32(dst + offset + 24, flags); // flags
3261  AV_WL32(dst + offset + 28, crc); // crc
3262  memcpy(dst + offset + 32, src, blocksize); // block data
3263 
3264  src += blocksize;
3265  srclen -= blocksize;
3266  offset += blocksize + 32;
3267  }
3268 
3269  memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3270 
3271  *pdst = dst;
3272  *size = dstlen;
3273 
3274  return 0;
3275 
3276 fail:
3277  av_freep(&dst);
3278  return ret;
3279 }
3280 
3282  uint8_t **pdst, int *size)
3283 {
3284  uint8_t *dst;
3285  int dstlen = *size + 8;
3286 
3287  dst = av_malloc(dstlen + AV_INPUT_BUFFER_PADDING_SIZE);
3288  if (!dst)
3289  return AVERROR(ENOMEM);
3290 
3291  AV_WB32(dst, dstlen);
3292  AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3293  memcpy(dst + 8, src, dstlen - 8);
3294  memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3295 
3296  *pdst = dst;
3297  *size = dstlen;
3298 
3299  return 0;
3300 }
3301 
3303  MatroskaTrack *track,
3304  AVStream *st,
3305  uint8_t *data, int data_len,
3306  uint64_t timecode,
3307  uint64_t duration,
3308  int64_t pos)
3309 {
3310  AVPacket pktl, *pkt = &pktl;
3311  uint8_t *id, *settings, *text, *buf;
3312  int id_len, settings_len, text_len;
3313  uint8_t *p, *q;
3314  int err;
3315 
3316  if (data_len <= 0)
3317  return AVERROR_INVALIDDATA;
3318 
3319  p = data;
3320  q = data + data_len;
3321 
3322  id = p;
3323  id_len = -1;
3324  while (p < q) {
3325  if (*p == '\r' || *p == '\n') {
3326  id_len = p - id;
3327  if (*p == '\r')
3328  p++;
3329  break;
3330  }
3331  p++;
3332  }
3333 
3334  if (p >= q || *p != '\n')
3335  return AVERROR_INVALIDDATA;
3336  p++;
3337 
3338  settings = p;
3339  settings_len = -1;
3340  while (p < q) {
3341  if (*p == '\r' || *p == '\n') {
3342  settings_len = p - settings;
3343  if (*p == '\r')
3344  p++;
3345  break;
3346  }
3347  p++;
3348  }
3349 
3350  if (p >= q || *p != '\n')
3351  return AVERROR_INVALIDDATA;
3352  p++;
3353 
3354  text = p;
3355  text_len = q - p;
3356  while (text_len > 0) {
3357  const int len = text_len - 1;
3358  const uint8_t c = p[len];
3359  if (c != '\r' && c != '\n')
3360  break;
3361  text_len = len;
3362  }
3363 
3364  if (text_len <= 0)
3365  return AVERROR_INVALIDDATA;
3366 
3367  err = av_new_packet(pkt, text_len);
3368  if (err < 0) {
3369  return err;
3370  }
3371 
3372  memcpy(pkt->data, text, text_len);
3373 
3374  if (id_len > 0) {
3375  buf = av_packet_new_side_data(pkt,
3377  id_len);
3378  if (!buf) {
3379  av_packet_unref(pkt);
3380  return AVERROR(ENOMEM);
3381  }
3382  memcpy(buf, id, id_len);
3383  }
3384 
3385  if (settings_len > 0) {
3386  buf = av_packet_new_side_data(pkt,
3388  settings_len);
3389  if (!buf) {
3390  av_packet_unref(pkt);
3391  return AVERROR(ENOMEM);
3392  }
3393  memcpy(buf, settings, settings_len);
3394  }
3395 
3396  // Do we need this for subtitles?
3397  // pkt->flags = AV_PKT_FLAG_KEY;
3398 
3399  pkt->stream_index = st->index;
3400  pkt->pts = timecode;
3401 
3402  // Do we need this for subtitles?
3403  // pkt->dts = timecode;
3404 
3405  pkt->duration = duration;
3406  pkt->pos = pos;
3407 
3408  err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3409  if (err < 0) {
3410  av_packet_unref(pkt);
3411  return AVERROR(ENOMEM);
3412  }
3413 
3414  return 0;
3415 }
3416 
3418  MatroskaTrack *track, AVStream *st,
3419  AVBufferRef *buf, uint8_t *data, int pkt_size,
3420  uint64_t timecode, uint64_t lace_duration,
3421  int64_t pos, int is_keyframe,
3422  uint8_t *additional, uint64_t additional_id, int additional_size,
3423  int64_t discard_padding)
3424 {
3425  MatroskaTrackEncoding *encodings = track->encodings.elem;
3426  uint8_t *pkt_data = data;
3427  int res = 0;
3428  AVPacket pktl, *pkt = &pktl;
3429 
3430  if (encodings && !encodings->type && encodings->scope & 1) {
3431  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3432  if (res < 0)
3433  return res;
3434  }
3435 
3436  if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3437  uint8_t *wv_data;
3438  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3439  if (res < 0) {
3440  av_log(matroska->ctx, AV_LOG_ERROR,
3441  "Error parsing a wavpack block.\n");
3442  goto fail;
3443  }
3444  if (pkt_data != data)
3445  av_freep(&pkt_data);
3446  pkt_data = wv_data;
3447  }
3448 
3449  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3450  AV_RB32(pkt_data + 4) != MKBETAG('i', 'c', 'p', 'f')) {
3451  uint8_t *pr_data;
3452  res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3453  if (res < 0) {
3454  av_log(matroska->ctx, AV_LOG_ERROR,
3455  "Error parsing a prores block.\n");
3456  goto fail;
3457  }
3458  if (pkt_data != data)
3459  av_freep(&pkt_data);
3460  pkt_data = pr_data;
3461  }
3462 
3463  if (!pkt_size && !additional_size)
3464  goto no_output;
3465 
3466  av_init_packet(pkt);
3467  if (pkt_data != data)
3468  pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3469  NULL, NULL, 0);
3470  else
3471  pkt->buf = av_buffer_ref(buf);
3472 
3473  if (!pkt->buf) {
3474  res = AVERROR(ENOMEM);
3475  goto fail;
3476  }
3477 
3478  pkt->data = pkt_data;
3479  pkt->size = pkt_size;
3480  pkt->flags = is_keyframe;
3481  pkt->stream_index = st->index;
3482 
3483  if (additional_size > 0) {
3484  uint8_t *side_data = av_packet_new_side_data(pkt,
3486  additional_size + 8);
3487  if (!side_data) {
3488  av_packet_unref(pkt);
3489  return AVERROR(ENOMEM);
3490  }
3491  AV_WB64(side_data, additional_id);
3492  memcpy(side_data + 8, additional, additional_size);
3493  }
3494 
3495  if (discard_padding) {
3496  uint8_t *side_data = av_packet_new_side_data(pkt,
3498  10);
3499  if (!side_data) {
3500  av_packet_unref(pkt);
3501  return AVERROR(ENOMEM);
3502  }
3503  discard_padding = av_rescale_q(discard_padding,
3504  (AVRational){1, 1000000000},
3505  (AVRational){1, st->codecpar->sample_rate});
3506  if (discard_padding > 0) {
3507  AV_WL32(side_data + 4, discard_padding);
3508  } else {
3509  AV_WL32(side_data, -discard_padding);
3510  }
3511  }
3512 
3513  if (track->ms_compat)
3514  pkt->dts = timecode;
3515  else
3516  pkt->pts = timecode;
3517  pkt->pos = pos;
3518  pkt->duration = lace_duration;
3519 
3520 #if FF_API_CONVERGENCE_DURATION
3522  if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3523  pkt->convergence_duration = lace_duration;
3524  }
3526 #endif
3527 
3528  res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3529  if (res < 0) {
3530  av_packet_unref(pkt);
3531  return AVERROR(ENOMEM);
3532  }
3533 
3534  return 0;
3535 
3536 no_output:
3537 fail:
3538  if (pkt_data != data)
3539  av_freep(&pkt_data);
3540  return res;
3541 }
3542 
3544  int size, int64_t pos, uint64_t cluster_time,
3545  uint64_t block_duration, int is_keyframe,
3546  uint8_t *additional, uint64_t additional_id, int additional_size,
3547  int64_t cluster_pos, int64_t discard_padding)
3548 {
3549  uint64_t timecode = AV_NOPTS_VALUE;
3550  MatroskaTrack *track;
3551  int res = 0;
3552  AVStream *st;
3553  int16_t block_time;
3554  uint32_t *lace_size = NULL;
3555  int n, flags, laces = 0;
3556  uint64_t num;
3557  int trust_default_duration = 1;
3558 
3559  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3560  return n;
3561  }
3562  data += n;
3563  size -= n;
3564 
3565  track = matroska_find_track_by_num(matroska, num);
3566  if (!track || size < 3)
3567  return AVERROR_INVALIDDATA;
3568 
3569  if (!(st = track->stream)) {
3570  av_log(matroska->ctx, AV_LOG_VERBOSE,
3571  "No stream associated to TrackNumber %"PRIu64". "
3572  "Ignoring Block with this TrackNumber.\n", num);
3573  return 0;
3574  }
3575 
3576  if (st->discard >= AVDISCARD_ALL)
3577  return res;
3578  av_assert1(block_duration != AV_NOPTS_VALUE);
3579 
3580  block_time = sign_extend(AV_RB16(data), 16);
3581  data += 2;
3582  flags = *data++;
3583  size -= 3;
3584  if (is_keyframe == -1)
3585  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3586 
3587  if (cluster_time != (uint64_t) -1 &&
3588  (block_time >= 0 || cluster_time >= -block_time)) {
3589  timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3590  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3591  timecode < track->end_timecode)
3592  is_keyframe = 0; /* overlapping subtitles are not key frame */
3593  if (is_keyframe) {
3594  ff_reduce_index(matroska->ctx, st->index);
3595  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3597  }
3598  }
3599 
3600  if (matroska->skip_to_keyframe &&
3601  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3602  // Compare signed timecodes. Timecode may be negative due to codec delay
3603  // offset. We don't support timestamps greater than int64_t anyway - see
3604  // AVPacket's pts.
3605  if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3606  return res;
3607  if (is_keyframe)
3608  matroska->skip_to_keyframe = 0;
3609  else if (!st->skip_to_keyframe) {
3610  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3611  matroska->skip_to_keyframe = 0;
3612  }
3613  }
3614 
3615  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3616  &lace_size, &laces);
3617 
3618  if (res)
3619  goto end;
3620 
3621  if (track->audio.samplerate == 8000) {
3622  // If this is needed for more codecs, then add them here
3623  if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3624  if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3625  trust_default_duration = 0;
3626  }
3627  }
3628 
3629  if (!block_duration && trust_default_duration)
3630  block_duration = track->default_duration * laces / matroska->time_scale;
3631 
3632  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3633  track->end_timecode =
3634  FFMAX(track->end_timecode, timecode + block_duration);
3635 
3636  for (n = 0; n < laces; n++) {
3637  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3638 
3639  if (lace_size[n] > size) {
3640  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3641  break;
3642  }
3643 
3644  if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3648  st->codecpar->block_align && track->audio.sub_packet_size) {
3649  res = matroska_parse_rm_audio(matroska, track, st, data,
3650  lace_size[n],
3651  timecode, pos);
3652  if (res)
3653  goto end;
3654 
3655  } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3656  res = matroska_parse_webvtt(matroska, track, st,
3657  data, lace_size[n],
3658  timecode, lace_duration,
3659  pos);
3660  if (res)
3661  goto end;
3662  } else {
3663  res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3664  timecode, lace_duration, pos,
3665  !n ? is_keyframe : 0,
3666  additional, additional_id, additional_size,
3667  discard_padding);
3668  if (res)
3669  goto end;
3670  }
3671 
3672  if (timecode != AV_NOPTS_VALUE)
3673  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3674  data += lace_size[n];
3675  size -= lace_size[n];
3676  }
3677 
3678 end:
3679  av_free(lace_size);
3680  return res;
3681 }
3682 
3684 {
3685  MatroskaCluster *cluster = &matroska->current_cluster;
3686  MatroskaBlock *block = &cluster->block;
3687  int res;
3688 
3689  av_assert0(matroska->num_levels <= 2);
3690 
3691  if (matroska->num_levels == 1) {
3692  res = ebml_parse(matroska, matroska_segment, NULL);
3693 
3694  if (res == 1) {
3695  /* Found a cluster: subtract the size of the ID already read. */
3696  cluster->pos = avio_tell(matroska->ctx->pb) - 4;
3697 
3698  res = ebml_parse(matroska, matroska_cluster_enter, cluster);
3699  if (res < 0)
3700  return res;
3701  }
3702  }
3703 
3704  if (matroska->num_levels == 2) {
3705  /* We are inside a cluster. */
3706  res = ebml_parse(matroska, matroska_cluster_parsing, cluster);
3707 
3708  if (res >= 0 && block->bin.size > 0) {
3709  int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3710  uint8_t* additional = block->additional.size > 0 ?
3711  block->additional.data : NULL;
3712 
3713  res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3714  block->bin.size, block->bin.pos,
3715  cluster->timecode, block->duration,
3716  is_keyframe, additional, block->additional_id,
3717  block->additional.size, cluster->pos,
3718  block->discard_padding);
3719  }
3720 
3721  ebml_free(matroska_blockgroup, block);
3722  memset(block, 0, sizeof(*block));
3723  } else if (!matroska->num_levels) {
3724  if (!avio_feof(matroska->ctx->pb)) {
3725  avio_r8(matroska->ctx->pb);
3726  if (!avio_feof(matroska->ctx->pb)) {
3727  av_log(matroska->ctx, AV_LOG_WARNING, "File extends beyond "
3728  "end of segment.\n");
3729  return AVERROR_INVALIDDATA;
3730  }
3731  }
3732  matroska->done = 1;
3733  return AVERROR_EOF;
3734  }
3735 
3736  return res;
3737 }
3738 
3740 {
3741  MatroskaDemuxContext *matroska = s->priv_data;
3742  int ret = 0;
3743 
3744  if (matroska->resync_pos == -1) {
3745  // This can only happen if generic seeking has been used.
3746  matroska->resync_pos = avio_tell(s->pb);
3747  }
3748 
3749  while (matroska_deliver_packet(matroska, pkt)) {
3750  if (matroska->done)
3751  return (ret < 0) ? ret : AVERROR_EOF;
3752  if (matroska_parse_cluster(matroska) < 0 && !matroska->done)
3753  ret = matroska_resync(matroska, matroska->resync_pos);
3754  }
3755 
3756  return 0;
3757 }
3758 
3759 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3760  int64_t timestamp, int flags)
3761 {
3762  MatroskaDemuxContext *matroska = s->priv_data;
3763  MatroskaTrack *tracks = NULL;
3764  AVStream *st = s->streams[stream_index];
3765  int i, index;
3766 
3767  /* Parse the CUES now since we need the index data to seek. */
3768  if (matroska->cues_parsing_deferred > 0) {
3769  matroska->cues_parsing_deferred = 0;
3770  matroska_parse_cues(matroska);
3771  }
3772 
3773  if (!st->nb_index_entries)
3774  goto err;
3775  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3776 
3777  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3778  matroska_reset_status(matroska, 0, st->index_entries[st->nb_index_entries - 1].pos);
3779  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3780  matroska_clear_queue(matroska);
3781  if (matroska_parse_cluster(matroska) < 0)
3782  break;
3783  }
3784  }
3785 
3786  matroska_clear_queue(matroska);
3787  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3788  goto err;
3789 
3790  tracks = matroska->tracks.elem;
3791  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3792  tracks[i].audio.pkt_cnt = 0;
3793  tracks[i].audio.sub_packet_cnt = 0;
3794  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3795  tracks[i].end_timecode = 0;
3796  }
3797 
3798  /* We seek to a level 1 element, so set the appropriate status. */
3799  matroska_reset_status(matroska, 0, st->index_entries[index].pos);
3800  if (flags & AVSEEK_FLAG_ANY) {
3801  st->skip_to_keyframe = 0;
3802  matroska->skip_to_timecode = timestamp;
3803  } else {
3804  st->skip_to_keyframe = 1;
3805  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3806  }
3807  matroska->skip_to_keyframe = 1;
3808  matroska->done = 0;
3809  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3810  return 0;
3811 err:
3812  // slightly hackish but allows proper fallback to
3813  // the generic seeking code.
3814  matroska_reset_status(matroska, 0, -1);
3815  matroska->resync_pos = -1;
3816  matroska_clear_queue(matroska);
3817  st->skip_to_keyframe =
3818  matroska->skip_to_keyframe = 0;
3819  matroska->done = 0;
3820  return -1;
3821 }
3822 
3824 {
3825  MatroskaDemuxContext *matroska = s->priv_data;
3826  MatroskaTrack *tracks = matroska->tracks.elem;
3827  int n;
3828 
3829  matroska_clear_queue(matroska);
3830 
3831  for (n = 0; n < matroska->tracks.nb_elem; n++)
3832  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3833  av_freep(&tracks[n].audio.buf);
3834  ebml_free(matroska_segment, matroska);
3835 
3836  return 0;
3837 }
3838 
3839 typedef struct {
3840  int64_t start_time_ns;
3841  int64_t end_time_ns;
3842  int64_t start_offset;
3843  int64_t end_offset;
3844 } CueDesc;
3845 
3846 /* This function searches all the Cues and returns the CueDesc corresponding to
3847  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3848  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3849  */
3850 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3851  MatroskaDemuxContext *matroska = s->priv_data;
3852  CueDesc cue_desc;
3853  int i;
3854  int nb_index_entries = s->streams[0]->nb_index_entries;
3855  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3856  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3857  for (i = 1; i < nb_index_entries; i++) {
3858  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3859  index_entries[i].timestamp * matroska->time_scale > ts) {
3860  break;
3861  }
3862  }
3863  --i;
3864  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3865  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3866  if (i != nb_index_entries - 1) {
3867  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3868  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3869  } else {
3870  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3871  // FIXME: this needs special handling for files where Cues appear
3872  // before Clusters. the current logic assumes Cues appear after
3873  // Clusters.
3874  cue_desc.end_offset = cues_start - matroska->segment_start;
3875  }
3876  return cue_desc;
3877 }
3878 
3880 {
3881  MatroskaDemuxContext *matroska = s->priv_data;
3882  uint32_t id = matroska->current_id;
3883  int64_t cluster_pos, before_pos;
3884  int index, rv = 1;
3885  if (s->streams[0]->nb_index_entries <= 0) return 0;
3886  // seek to the first cluster using cues.
3887  index = av_index_search_timestamp(s->streams[0], 0, 0);
3888  if (index < 0) return 0;
3889  cluster_pos = s->streams[0]->index_entries[index].pos;
3890  before_pos = avio_tell(s->pb);
3891  while (1) {
3892  uint64_t cluster_id, cluster_length;
3893  int read;
3894  AVPacket *pkt;
3895  avio_seek(s->pb, cluster_pos, SEEK_SET);
3896  // read cluster id and length
3897  read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3898  if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3899  break;
3900  read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3901  if (read < 0)
3902  break;
3903 
3904  matroska_reset_status(matroska, 0, cluster_pos);
3905  matroska_clear_queue(matroska);
3906  if (matroska_parse_cluster(matroska) < 0 ||
3907  !matroska->queue) {
3908  break;
3909  }
3910  pkt = &matroska->queue->pkt;
3911  // 4 + read is the length of the cluster id and the cluster length field.
3912  cluster_pos += 4 + read + cluster_length;
3913  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3914  rv = 0;
3915  break;
3916  }
3917  }
3918 
3919  /* Restore the status after matroska_read_header: */
3920  matroska_reset_status(matroska, id, before_pos);
3921 
3922  return rv;
3923 }
3924 
3925 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3926  double min_buffer, double* buffer,
3927  double* sec_to_download, AVFormatContext *s,
3928  int64_t cues_start)
3929 {
3930  double nano_seconds_per_second = 1000000000.0;
3931  double time_sec = time_ns / nano_seconds_per_second;
3932  int rv = 0;
3933  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3934  int64_t end_time_ns = time_ns + time_to_search_ns;
3935  double sec_downloaded = 0.0;
3936  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3937  if (desc_curr.start_time_ns == -1)
3938  return -1;
3939  *sec_to_download = 0.0;
3940 
3941  // Check for non cue start time.
3942  if (time_ns > desc_curr.start_time_ns) {
3943  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3944  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3945  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3946  double timeToDownload = (cueBytes * 8.0) / bps;
3947 
3948  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3949  *sec_to_download += timeToDownload;
3950 
3951  // Check if the search ends within the first cue.
3952  if (desc_curr.end_time_ns >= end_time_ns) {
3953  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3954  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3955  sec_downloaded = percent_to_sub * sec_downloaded;
3956  *sec_to_download = percent_to_sub * *sec_to_download;
3957  }
3958 
3959  if ((sec_downloaded + *buffer) <= min_buffer) {
3960  return 1;
3961  }
3962 
3963  // Get the next Cue.
3964  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3965  }
3966 
3967  while (desc_curr.start_time_ns != -1) {
3968  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3969  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3970  double desc_sec = desc_ns / nano_seconds_per_second;
3971  double bits = (desc_bytes * 8.0);
3972  double time_to_download = bits / bps;
3973 
3974  sec_downloaded += desc_sec - time_to_download;
3975  *sec_to_download += time_to_download;
3976 
3977  if (desc_curr.end_time_ns >= end_time_ns) {
3978  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3979  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3980  sec_downloaded = percent_to_sub * sec_downloaded;
3981  *sec_to_download = percent_to_sub * *sec_to_download;
3982 
3983  if ((sec_downloaded + *buffer) <= min_buffer)
3984  rv = 1;
3985  break;
3986  }
3987 
3988  if ((sec_downloaded + *buffer) <= min_buffer) {
3989  rv = 1;
3990  break;
3991  }
3992 
3993  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3994  }
3995  *buffer = *buffer + sec_downloaded;
3996  return rv;
3997 }
3998 
3999 /* This function computes the bandwidth of the WebM file with the help of
4000  * buffer_size_after_time_downloaded() function. Both of these functions are
4001  * adapted from WebM Tools project and are adapted to work with FFmpeg's
4002  * Matroska parsing mechanism.
4003  *
4004  * Returns the bandwidth of the file on success; -1 on error.
4005  * */
4006 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
4007 {
4008  MatroskaDemuxContext *matroska = s->priv_data;
4009  AVStream *st = s->streams[0];
4010  double bandwidth = 0.0;
4011  int i;
4012 
4013  for (i = 0; i < st->nb_index_entries; i++) {
4014  int64_t prebuffer_ns = 1000000000;
4015  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
4016  double nano_seconds_per_second = 1000000000.0;
4017  int64_t prebuffered_ns = time_ns + prebuffer_ns;
4018  double prebuffer_bytes = 0.0;
4019  int64_t temp_prebuffer_ns = prebuffer_ns;
4020  int64_t pre_bytes, pre_ns;
4021  double pre_sec, prebuffer, bits_per_second;
4022  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
4023 
4024  // Start with the first Cue.
4025  CueDesc desc_end = desc_beg;
4026 
4027  // Figure out how much data we have downloaded for the prebuffer. This will
4028  // be used later to adjust the bits per sample to try.
4029  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
4030  // Prebuffered the entire Cue.
4031  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
4032  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
4033  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4034  }
4035  if (desc_end.start_time_ns == -1) {
4036  // The prebuffer is larger than the duration.
4037  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
4038  return -1;
4039  bits_per_second = 0.0;
4040  } else {
4041  // The prebuffer ends in the last Cue. Estimate how much data was
4042  // prebuffered.
4043  pre_bytes = desc_end.end_offset - desc_end.start_offset;
4044  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
4045  pre_sec = pre_ns / nano_seconds_per_second;
4046  prebuffer_bytes +=
4047  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
4048 
4049  prebuffer = prebuffer_ns / nano_seconds_per_second;
4050 
4051  // Set this to 0.0 in case our prebuffer buffers the entire video.
4052  bits_per_second = 0.0;
4053  do {
4054  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
4055  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
4056  double desc_sec = desc_ns / nano_seconds_per_second;
4057  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
4058 
4059  // Drop the bps by the percentage of bytes buffered.
4060  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
4061  double mod_bits_per_second = calc_bits_per_second * percent;
4062 
4063  if (prebuffer < desc_sec) {
4064  double search_sec =
4065  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
4066 
4067  // Add 1 so the bits per second should be a little bit greater than file
4068  // datarate.
4069  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
4070  const double min_buffer = 0.0;
4071  double buffer = prebuffer;
4072  double sec_to_download = 0.0;
4073 
4074  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
4075  min_buffer, &buffer, &sec_to_download,
4076  s, cues_start);
4077  if (rv < 0) {
4078  return -1;
4079  } else if (rv == 0) {
4080  bits_per_second = (double)(bps);
4081  break;
4082  }
4083  }
4084 
4085  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4086  } while (desc_end.start_time_ns != -1);
4087  }
4088  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
4089  }
4090  return (int64_t)bandwidth;
4091 }
4092 
4093 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
4094 {
4095  MatroskaDemuxContext *matroska = s->priv_data;
4096  EbmlList *seekhead_list = &matroska->seekhead;
4097  MatroskaSeekhead *seekhead = seekhead_list->elem;
4098  char *buf;
4099  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
4100  int i;
4101  int end = 0;
4102 
4103  // determine cues start and end positions
4104  for (i = 0; i < seekhead_list->nb_elem; i++)
4105  if (seekhead[i].id == MATROSKA_ID_CUES)
4106  break;
4107 
4108  if (i >= seekhead_list->nb_elem) return -1;
4109 
4110  before_pos = avio_tell(matroska->ctx->pb);
4111  cues_start = seekhead[i].pos + matroska->segment_start;
4112  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
4113  // cues_end is computed as cues_start + cues_length + length of the
4114  // Cues element ID (i.e. 4) + EBML length of the Cues element.
4115  // cues_end is inclusive and the above sum is reduced by 1.
4116  uint64_t cues_length, cues_id;
4117  int bytes_read;
4118  bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
4119  if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
4120  return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
4121  bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
4122  if (bytes_read < 0)
4123  return bytes_read;
4124  cues_end = cues_start + 4 + bytes_read + cues_length - 1;
4125  }
4126  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
4127  if (cues_start == -1 || cues_end == -1) return -1;
4128 
4129  // parse the cues
4130  matroska_parse_cues(matroska);
4131 
4132  // cues start
4133  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
4134 
4135  // cues end
4136  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
4137 
4138  // if the file has cues at the start, fix up the init range so that
4139  // it does not include it
4140  if (cues_start <= init_range)
4141  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
4142 
4143  // bandwidth
4144  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
4145  if (bandwidth < 0) return -1;
4146  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
4147 
4148  // check if all clusters start with key frames
4150 
4151  // store cue point timestamps as a comma separated list for checking subsegment alignment in
4152  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
4153  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
4154  if (!buf) return -1;
4155  strcpy(buf, "");
4156  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
4157  int ret = snprintf(buf + end, 20,
4158  "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
4159  i != s->streams[0]->nb_index_entries - 1 ? "," : "");
4160  if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
4161  av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
4162  av_free(buf);
4163  return AVERROR_INVALIDDATA;
4164  }
4165  end += ret;
4166  }
4167  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
4168  av_free(buf);
4169 
4170  return 0;
4171 }
4172 
4174 {
4175  char *buf;
4176  int ret = matroska_read_header(s);
4177  int64_t init_range;
4178  MatroskaTrack *tracks;
4179  MatroskaDemuxContext *matroska = s->priv_data;
4180  if (ret) {
4181  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4182  return -1;
4183  }
4184  if (!s->nb_streams) {
4186  av_log(s, AV_LOG_ERROR, "No streams found\n");
4187  return AVERROR_INVALIDDATA;
4188  }
4189 
4190  if (!matroska->is_live) {
4191  buf = av_asprintf("%g", matroska->duration);
4192  if (!buf) return AVERROR(ENOMEM);
4193  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4194  av_free(buf);
4195 
4196  // initialization range
4197  // 5 is the offset of Cluster ID.
4198  init_range = avio_tell(s->pb) - 5;
4199  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4200  }
4201 
4202  // basename of the file
4203  buf = strrchr(s->url, '/');
4204  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4205 
4206  // track number
4207  tracks = matroska->tracks.elem;
4208  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4209 
4210  // parse the cues and populate Cue related fields
4211  if (!matroska->is_live) {
4212  ret = webm_dash_manifest_cues(s, init_range);
4213  if (ret < 0) {
4214  av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4215  return ret;
4216  }
4217  }
4218 
4219  // use the bandwidth from the command line if it was provided
4220  if (matroska->bandwidth > 0) {
4222  matroska->bandwidth, 0);
4223  }
4224  return 0;
4225 }
4226 
4228 {
4229  return AVERROR_EOF;
4230 }
4231 
4232 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4233 static const AVOption options[] = {
4234  { "live", "flag indicating that the input is a live file that only has the headers.", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
4235  { "bandwidth", "bandwidth of this stream to be specified in the DASH manifest.", OFFSET(bandwidth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
4236  { NULL },
4237 };
4238 
4239 static const AVClass webm_dash_class = {
4240  .class_name = "WebM DASH Manifest demuxer",
4241  .item_name = av_default_item_name,
4242  .option = options,
4243  .version = LIBAVUTIL_VERSION_INT,
4244 };
4245 
4247  .name = "matroska,webm",
4248  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4249  .extensions = "mkv,mk3d,mka,mks",
4250  .priv_data_size = sizeof(MatroskaDemuxContext),
4256  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4257 };
4258 
4260  .name = "webm_dash_manifest",
4261  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4262  .priv_data_size = sizeof(MatroskaDemuxContext),
4266  .priv_class = &webm_dash_class,
4267 };
int32_t pitch
Rotation around the right vector [-90, 90].
Definition: spherical.h:127
const char * name
Definition: avisynth_c.h:867
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
const char * s
Definition: matroskadec.c:106
#define MATROSKA_ID_VIDEOPROJECTIONPOSEYAW
Definition: matroska.h:159
AVSphericalMapping * av_spherical_alloc(size_t *size)
Allocate a AVSphericalVideo structure and initialize its fields to default values.
Definition: spherical.c:24
uint64_t codec_delay_in_track_tb
Definition: matroskadec.c:247
enum AVChromaLocation chroma_location
Definition: avcodec.h:4047
#define AV_DISPOSITION_METADATA
Definition: avformat.h:863
#define NULL
Definition: coverity.c:32
MatroskaBlock block
Definition: matroskadec.c:328
static EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:651
#define MATROSKA_ID_BLOCKADDID
Definition: matroska.h:230
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:104
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:4038
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:469
static const struct @314 planes[]
static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int size, uint64_t timecode, int64_t pos)
Definition: matroskadec.c:3121
Bytestream IO Context.
Definition: avio.h:161
enum AVColorTransferCharacteristic color_trc
Definition: avcodec.h:4045
#define MATROSKA_ID_VIDEOFLAGINTERLACED
Definition: matroska.h:121
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define MATROSKA_ID_VIDEOCOLOR_GX
Definition: matroska.h:147
uint64_t seek_preroll
Definition: matroskadec.c:241
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
const char *const ff_matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT]
Definition: matroska.c:165
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1746
#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:125
int size
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1340
uint64_t type
Definition: matroskadec.c:232
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:101
static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:4227
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2976
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
uint64_t version
Definition: matroskadec.c:125
AVOption.
Definition: opt.h:246
static EbmlSyntax matroska_blockmore[]
Definition: matroskadec.c:709
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:4246
static int is_keyframe(NalUnitType naltype)
Definition: libx265.c:52
int ff_packet_list_put(AVPacketList **head, AVPacketList **tail, AVPacket *pkt, int flags)
Append an AVPacket to the list.
Definition: utils.c:447
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:2052
AVPacketList * queue
Definition: matroskadec.c:366
#define MATROSKA_ID_VIDEOPROJECTIONPOSEROLL
Definition: matroska.h:161
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:192
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3142
#define MATROSKA_ID_CODECPRIVATE
Definition: matroska.h:89
const unsigned char ff_sipr_subpk_size[4]
Definition: rmsipr.c:25
#define MATROSKA_ID_TAGTARGETS_TYPE
Definition: matroska.h:210
uint64_t display_unit
Definition: matroskadec.c:194
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static EbmlSyntax matroska_track_video[19]
Definition: matroskadec.c:397
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
#define INITIALIZATION_RANGE
Definition: matroska.h:371
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1497
#define AV_RB64
Definition: intreadwrite.h:164
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:1041
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3879
else temp
Definition: vf_mcdeint.c:256
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:4903
int64_t pos
Definition: avformat.h:810
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:173
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:167
uint64_t chapteruid
Definition: matroskadec.c:298
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2513
static av_always_inline float av_int2float(uint32_t i)
Reinterpret a 32-bit integer as a float.
Definition: intfloat.h:40
#define MATROSKA_ID_TRACKFLAGDEFAULT
Definition: matroska.h:99
uint64_t additional_id
Definition: matroskadec.c:322
EbmlList tag
Definition: matroskadec.c:304
static int segment_start(AVFormatContext *s, int write_header)
Definition: segment.c:240
uint64_t uid
Definition: matroskadec.c:231
int64_t data_offset
offset of the first packet
Definition: internal.h:82
static EbmlSyntax matroska_segments[]
Definition: matroskadec.c:704
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
channels
Definition: aptx.c:30
MatroskaCluster current_cluster
Definition: matroskadec.c:382
uint32_t fourcc
Definition: vaapi_decode.c:238
enum AVCodecID codec_id
Definition: qsv.c:72
Video represents a portion of a sphere mapped on a flat surface using equirectangular projection...
Definition: spherical.h:72
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
AVRational white_point[2]
CIE 1931 xy chromaticity coords of white point.
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
#define MATROSKA_ID_TAGTARGETS_ATTACHUID
Definition: matroska.h:214
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:882
int size
Definition: avcodec.h:1478
static EbmlSyntax matroska_track_video_projection[]
Definition: matroskadec.c:464
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:225
const char * b
Definition: vf_curves.c:116
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1110
MatroskaTrackVideoProjection projection
Definition: matroskadec.c:200
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1811
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:237
uint64_t flag_forced
Definition: matroskadec.c:240
uint64_t max_size
Definition: matroskadec.c:126
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:213
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
#define AV_RL16
Definition: intreadwrite.h:42
uint64_t flag_default
Definition: matroskadec.c:239
#define MATROSKA_ID_VIDEOCOLOR_RX
Definition: matroska.h:145
Video represents a sphere mapped on a flat surface using equirectangular projection.
Definition: spherical.h:56
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:125
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:168
char * name
Definition: matroskadec.c:287
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
int has_primaries
Flag indicating whether the display primaries (and white point) are set.
const char * key
int version
Definition: avisynth_c.h:858
static EbmlSyntax matroska_index[2]
Definition: matroskadec.c:397
discard all
Definition: avcodec.h:811
#define MATROSKA_ID_VIDEOPROJECTIONTYPE
Definition: matroska.h:157
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:344
static EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:495
static AVPacket pkt
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:196
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX
Definition: matroska.h:153
static int ebml_read_binary(AVIOContext *pb, int length, int64_t pos, EbmlBin *bin)
Definition: matroskadec.c:980
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:785
MatroskaTrackAudio audio
Definition: matroskadec.c:243
#define MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ
Definition: matroska.h:135
uint64_t duration
Definition: matroskadec.c:318
#define src
Definition: vp8dsp.c:254
const struct EbmlSyntax * n
Definition: matroskadec.c:107
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:260
#define MATROSKA_ID_CLUSTERTIMECODE
Definition: matroska.h:224
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
#define MATROSKA_ID_ENCODINGENCALGO
Definition: matroska.h:180
static EbmlSyntax matroska_attachment[]
Definition: matroskadec.c:584
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:253
enum AVColorSpace color_space
Definition: avcodec.h:4046
#define MATROSKA_ID_TRACKCONTENTENCODINGS
Definition: matroska.h:105
int frame_size
Audio only.
Definition: avcodec.h:4078
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1366
#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:4604
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:243
Format I/O context.
Definition: avformat.h:1358
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:290
UID uid
Definition: mxfenc.c:2214
static int16_t block[64]
Definition: dct.c:115
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:1966
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:106
#define MATROSKA_ID_CODECDOWNLOADURL
Definition: matroska.h:92
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
int64_t end_timecode
Definition: matroskadec.c:250
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:4173
static EbmlSyntax matroska_mastering_meta[]
Definition: matroskadec.c:432
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
Definition: matroskadec.c:917
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
void ff_reduce_index(AVFormatContext *s, int stream_index)
Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by dis...
Definition: utils.c:1980
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1491
Public dictionary API.
int avpriv_dict_set_timestamp(AVDictionary **dict, const char *key, int64_t timestamp)
Set a dictionary value to an ISO-8601 compliant timestamp string.
Definition: dict.c:258
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:247
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1128
static char buffer[20]
Definition: seek.c:32
uint64_t pixel_height
Definition: matroskadec.c:192
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:369
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_VIDEOCOLOR_BX
Definition: matroska.h:149
#define MATROSKA_ID_CHAPLANG
Definition: matroska.h:256
#define av_malloc(s)
uint64_t stereo_mode
Definition: matroskadec.c:197
MatroskaTrackOperation operation
Definition: matroskadec.c:244
MatroskaTrackVideo video
Definition: matroskadec.c:242
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:261
int width
Video only.
Definition: avcodec.h:4023
static EbmlSyntax matroska_cluster_parsing[8]
Definition: matroskadec.c:397
static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start)
Definition: matroskadec.c:3850
static const AVProfile aac_profiles[]
void * elem
Definition: matroskadec.c:114
AVOptions.
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:97
MatroskaTrackCompression compression
Definition: matroskadec.c:145
uint8_t * data
Definition: matroskadec.c:120
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:75
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:800
AVPacket pkt
Definition: avformat.h:2025
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
uint64_t time
Definition: matroskadec.c:282
#define AV_RB32
Definition: intreadwrite.h:130
int ff_mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
Definition: matroska.c:171
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:3281
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:117
#define TRACK_NUMBER
Definition: matroska.h:379
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1947
enum AVStreamParseType need_parsing
Definition: avformat.h:1099
#define MATROSKA_ID_VIDEOCOLORCBSUBVERT
Definition: matroska.h:134
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:232
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:211
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:259
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
AVStream * stream
Definition: matroskadec.c:264
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4476
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
char * language
Definition: matroskadec.c:236
#define MATROSKA_ID_BLOCKMORE
Definition: matroska.h:229
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
int64_t duration
Definition: movenc.c:63
#define MATROSKA_ID_CUERELATIVEPOSITION
Definition: matroska.h:197
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:165
#define MATROSKA_ID_VIDEOCOLOR
Definition: matroska.h:127
int initial_padding
Audio only.
Definition: avcodec.h:4086
const char data[16]
Definition: mxf.c:91
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:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1489
uint8_t * data
Definition: avcodec.h:1477
uint64_t typevalue
Definition: matroskadec.c:296
uint64_t codec_delay
Definition: matroskadec.c:246
static EbmlSyntax matroska_tags[2]
Definition: matroskadec.c:397
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:112
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:258
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
#define MATROSKA_ID_BLOCKADDITIONS
Definition: matroska.h:228
uint32_t tag
Definition: movenc.c:1496
int64_t start_time_ns
Definition: matroskadec.c:3840
static EbmlSyntax ebml_header[]
Definition: matroskadec.c:404
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define MATROSKA_ID_CODECDECODEALL
Definition: matroska.h:93
#define MATROSKA_ID_ENCODINGENCRYPTION
Definition: matroska.h:178
size_t list_elem_size
Definition: matroskadec.c:100
enum AVCodecID id
Definition: internal.h:51
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define MATROSKA_ID_CUES
Definition: matroska.h:58
#define EBML_MAX_DEPTH
Definition: matroska.h:358
static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track)
Definition: matroskadec.c:2070
static EbmlSyntax matroska_track_operation[2]
Definition: matroskadec.c:397
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:921
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
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 has_luminance
Flag indicating whether the luminance (min_ and max_) have been set.
unsigned int alloc_elem_size
Definition: matroskadec.c:113
static const uint8_t header[24]
Definition: sdr2.c:67
static EbmlSyntax matroska_blockadditions[2]
Definition: matroskadec.c:397
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
#define MATROSKA_ID_VIDEOCOLOR_WHITEY
Definition: matroska.h:152
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
#define MATROSKA_ID_SEGMENTUID
Definition: matroska.h:72
#define EBML_UNKNOWN_LENGTH
Definition: matroskadec.c:71
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4059
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:647
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
#define AV_DISPOSITION_CAPTIONS
To specify text track kind (different from subtitles default).
Definition: avformat.h:861
EbmlList sub
Definition: matroskadec.c:291
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3986
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1509
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3683
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1073
#define MATROSKA_ID_CUEBLOCKNUMBER
Definition: matroska.h:199
#define MATROSKA_ID_TRACKUID
Definition: matroska.h:79
static EbmlSyntax matroska_tracks[2]
Definition: matroskadec.c:397
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
uint64_t display_height
Definition: matroskadec.c:190
#define U(x)
Definition: vp56_arith.h:37
static EbmlSyntax matroska_info[]
Definition: matroskadec.c:421
#define MATROSKA_ID_ENCODINGORDER
Definition: matroska.h:171
#define MATROSKA_ID_VIDEOSTEREOMODE
Definition: matroska.h:123
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
#define AVINDEX_KEYFRAME
Definition: avformat.h:817
#define FILENAME
Definition: matroska.h:374
Content light level needed by to transmit HDR over HDMI (CTA-861.3).
EbmlType type
Definition: matroskadec.c:99
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
#define MATROSKA_ID_VIDEOCOLOR_BY
Definition: matroska.h:150
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1598
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:236
int64_t end_offset
Definition: matroskadec.c:3843
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
Definition: avcodec.h:1190
#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:2163
#define MATROSKA_ID_VIDEOCOLORMAXCLL
Definition: matroska.h:141
MatroskaMasteringMeta mastering_meta
Definition: matroskadec.c:176
#define MATROSKA_ID_VIDEOCOLOR_WHITEX
Definition: matroska.h:151
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:888
#define AV_RB16
Definition: intreadwrite.h:53
AVChapter * chapter
Definition: matroskadec.c:273
#define AVERROR(e)
Definition: error.h:43
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:811
#define MATROSKA_ID_CLUSTER
Definition: matroska.h:62
static EbmlSyntax matroska_track_encodings[2]
Definition: matroskadec.c:397
#define MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT
Definition: matroska.h:136
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
enum AVColorPrimaries color_primaries
Definition: avcodec.h:4044
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:245
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num)
Definition: matroskadec.c:1030
char * url
input or output URL.
Definition: avformat.h:1454
const char * r
Definition: vf_curves.c:114
uint64_t display_width
Definition: matroskadec.c:189
#define MATROSKA_ID_WRITINGAPP
Definition: matroska.h:69
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
EbmlBin additional
Definition: matroskadec.c:323
const char *const ff_matroska_video_stereo_mode[MATROSKA_VIDEO_STEREOMODE_TYPE_NB]
Definition: matroska.c:147
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:565
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1460
static int matroska_probe(const AVProbeData *p)
Definition: matroskadec.c:1511
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:208
enum AVCodecID id
Definition: matroska.h:354
#define MATROSKA_ID_VIDEOPIXELCROPR
Definition: matroska.h:119
#define MATROSKA_ID_TRACKPLANEUID
Definition: matroska.h:86
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
static av_always_inline av_const double round(double x)
Definition: libm.h:444
#define MATROSKA_ID_ENCODINGCOMPSETTINGS
Definition: matroska.h:176
uint8_t bits
Definition: vp3data.h:202
#define EBML_ID_EBMLMAXIDLENGTH
Definition: matroska.h:38
AVBufferRef * av_buffer_create(uint8_t *data, int size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:28
#define MATROSKA_ID_CHAPTERFLAGHIDDEN
Definition: matroska.h:263
int av_buffer_realloc(AVBufferRef **pbuf, int size)
Reallocate a given buffer.
Definition: buffer.c:169
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
char * av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size)
Encode data to base64 and null-terminate.
Definition: base64.c:138
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:954
uint64_t timecode
Definition: matroskadec.c:329
#define CONFIG_ZLIB
Definition: config.h:513
#define FFMAX(a, b)
Definition: common.h:94
static EbmlSyntax matroska_chapter_entry[9]
Definition: matroskadec.c:397
AVRational max_luminance
Max luminance of mastering display (cd/m^2).
AVPacketList * queue_end
Definition: matroskadec.c:367
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:120
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3975
Only parse headers, do not repack.
Definition: avformat.h:801
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:638
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1476
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:131
int nb_elem
Definition: matroskadec.c:112
#define MATROSKA_ID_TAG
Definition: matroska.h:202
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
AVContentLightMetadata * av_content_light_metadata_alloc(size_t *size)
Allocate an AVContentLightMetadata structure and set its fields to default values.
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
static int matroska_reset_status(MatroskaDemuxContext *matroska, uint32_t id, int64_t position)
Definition: matroskadec.c:757
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
static EbmlSyntax matroska_track[27]
Definition: matroskadec.c:397
char * lang
Definition: matroskadec.c:289
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:838
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
uint32_t bound_bottom
Distance from the bottom edge.
Definition: spherical.h:170
static EbmlSyntax matroska_index_entry[3]
Definition: matroskadec.c:397
union EbmlSyntax::@264 def
static EbmlSyntax matroska_track_combine_planes[2]
Definition: matroskadec.c:397
#define MATROSKA_ID_ENCODINGSIGHASHALGO
Definition: matroska.h:183
static const struct TransferCharacteristics transfer_characteristics[AVCOL_TRC_NB]
uint64_t skip_to_timecode
Definition: matroskadec.c:373
Definition: dct.c:52
#define SKIP_THRESHOLD
Definition: matroskadec.c:76
int block_align
Audio only.
Definition: avcodec.h:4074
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:2812
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, uint64_t num)
Definition: matroskadec.c:1558
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1917
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int64_t i
Definition: matroskadec.c:103
Video frame is split into 6 faces of a cube, and arranged on a 3x2 layout.
Definition: spherical.h:65
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1846
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN
Definition: matroska.h:154
uint64_t start
Definition: matroskadec.c:268
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3305
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
Spherical video.
#define AV_BASE64_SIZE(x)
Calculate the output size needed to base64-encode x bytes to a null-terminated string.
Definition: base64.h:66
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
#define FFMIN(a, b)
Definition: common.h:96
#define MATROSKA_ID_TAGTARGETS
Definition: matroska.h:209
#define MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL
Definition: matroska.h:130
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
int av_stream_add_side_data(AVStream *st, enum AVPacketSideDataType type, uint8_t *data, size_t size)
Wrap an existing array as stream side data.
Definition: utils.c:5479
#define MATROSKA_VIDEO_STEREO_PLANE_COUNT
Definition: matroska.h:360
uint8_t interlaced
Definition: mxfenc.c:2217
#define MATROSKA_ID_TAGNAME
Definition: matroska.h:204
AVRational min_luminance
Min luminance of mastering display (cd/m^2).
#define MATROSKA_ID_TRACKTIMECODESCALE
Definition: matroska.h:107
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:264
uint64_t id_length
Definition: matroskadec.c:127
uint8_t w
Definition: llviddspenc.c:38
static void bit_depth(AudioStatsContext *s, uint64_t mask, uint64_t imask, AVRational *depth)
Definition: af_astats.c:226
static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
Definition: matroskadec.c:4093
This side data should be associated with a video stream and corresponds to the AVSphericalMapping str...
Definition: avcodec.h:1372
uint32_t bound_right
Distance from the right edge.
Definition: spherical.h:169
#define UNKNOWN_EQUIV
Definition: matroskadec.c:79
#define CLUSTER_KEYFRAME
Definition: matroska.h:377
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:203
uint64_t doctype_version
Definition: matroskadec.c:129
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
int32_t
#define MATROSKA_ID_TRACKMAXCACHE
Definition: matroska.h:103
static EbmlSyntax matroska_chapter[6]
Definition: matroskadec.c:397
#define DURATION
Definition: matroska.h:376
#define MATROSKA_ID_CHAPTERPHYSEQUIV
Definition: matroska.h:265
static int matroska_read_close(AVFormatContext *s)
Definition: matroskadec.c:3823
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
EbmlBin codec_priv
Definition: matroskadec.c:235
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
Definition: matroskadec.c:956
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1572
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:251
#define OFFSET(x)
Definition: matroskadec.c:4232
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
Definition: mem.c:476
#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
int32_t yaw
Rotation around the up vector [-180, 180].
Definition: spherical.h:126
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2705
AVDictionary * metadata
Definition: avformat.h:945
uint8_t * av_stream_new_side_data(AVStream *stream, enum AVPacketSideDataType type, int size)
Allocate new information from stream.
Definition: utils.c:5515
enum AVColorRange color_range
Video only.
Definition: avcodec.h:4043
Opaque data information usually sparse.
Definition: avutil.h:205
#define MATROSKA_ID_VIDEOCOLORSPACE
Definition: matroska.h:126
#define MATROSKA_ID_CHAPTERS
Definition: matroska.h:63
#define EBML_ID_VOID
Definition: matroska.h:45
static void mkv_stereo_mode_display_mul(int stereo_mode, int *h_width, int *h_height)
Definition: matroskadec.c:2045
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1711
uint64_t max_block_additional_id
Definition: matroskadec.c:252
if(ret< 0)
Definition: vf_mcdeint.c:279
#define MATROSKA_ID_VIDEOCOLORCHROMASUBVERT
Definition: matroska.h:132
const uint8_t ff_log2_tab[256]
Definition: log2_tab.c:23
#define MATROSKA_ID_AUDIOSAMPLINGFREQ
Definition: matroska.h:164
#define FF_ARRAY_ELEMS(a)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:849
double f
Definition: matroskadec.c:105
#define MATROSKA_ID_TRACKMINCACHE
Definition: matroska.h:102
#define av_log2
Definition: intmath.h:83
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:522
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
Definition: matroskadec.c:1957
static int matroska_parse_flac(AVFormatContext *s, MatroskaTrack *track, int *offset)
Definition: matroskadec.c:1963
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
static EbmlSyntax matroska_track_video_color[15]
Definition: matroskadec.c:397
uint32_t padding
Number of pixels to pad from the edge of each cube face.
Definition: spherical.h:182
static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: matroskadec.c:3759
Stream structure.
Definition: avformat.h:881
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:3199
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define MATROSKA_ID_TRACKPLANETYPE
Definition: matroska.h:87
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVSphericalProjection
Projection of the video surface(s) on a sphere.
Definition: spherical.h:51
Content light level (based on CTA-861.3).
Definition: avcodec.h:1379
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
EbmlList encodings
Definition: matroskadec.c:245
#define CUES_END
Definition: matroska.h:373
char * codec_id
Definition: matroskadec.c:234
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:826
#define MATROSKA_ID_VIDEOPIXELCROPB
Definition: matroska.h:116
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
#define MATROSKA_ID_VIDEOCOLORMATRIXCOEFF
Definition: matroska.h:129
static int matroska_parse_tracks(AVFormatContext *s)
Definition: matroskadec.c:2291
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:862
int ff_get_qtpalette(int codec_id, AVIOContext *pb, uint32_t *palette)
Retrieve the palette (or "color table" in QuickTime terms), either from the video sample description...
Definition: qtpalette.c:31
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
#define MATROSKA_ID_TRACKFLAGFORCED
Definition: matroska.h:100
#define MATROSKA_ID_TAGS
Definition: matroska.h:59
static EbmlSyntax matroska_track_plane[]
Definition: matroskadec.c:533
#define MATROSKA_ID_VIDEOCOLORPRIMARIES
Definition: matroska.h:140
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom.c:318
#define MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH
Definition: matroska.h:160
#define MATROSKA_ID_TAGDEFAULT
Definition: matroska.h:207
#define BANDWIDTH
Definition: matroska.h:375
#define MATROSKA_ID_SEEKID
Definition: matroska.h:220
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
#define MATROSKA_ID_ENCODINGCOMPALGO
Definition: matroska.h:175
#define MATROSKA_ID_BLOCK
Definition: matroska.h:235
#define MATROSKA_ID_INFO
Definition: matroska.h:56
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
#define MATROSKA_ID_TAGTARGETS_TRACKUID
Definition: matroska.h:212
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define CUE_TIMESTAMPS
Definition: matroska.h:378
#define MATROSKA_ID_TAGLANG
Definition: matroska.h:206
uint64_t pixel_width
Definition: matroskadec.c:191
#define MATROSKA_ID_TRACKCOMBINEPLANES
Definition: matroska.h:84
static const AVClass webm_dash_class
Definition: matroskadec.c:4239
static EbmlSyntax matroska_segment[9]
Definition: matroskadec.c:397
int64_t start_offset
Definition: matroskadec.c:3842
#define MATROSKA_ID_TRACKFLAGENABLED
Definition: matroska.h:98
#define MATROSKA_ID_TRACKS
Definition: matroska.h:57
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number, int eof_forbidden)
Definition: matroskadec.c:823
void * buf
Definition: avisynth_c.h:766
#define MATROSKA_ID_TRACKPLANE
Definition: matroska.h:85
Data found in BlockAdditional element of matroska container.
Definition: avcodec.h:1335
#define CHILD_OF(parent)
Definition: matroskadec.c:391
#define MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ
Definition: matroska.h:131
#define MATROSKA_ID_TRACKNAME
Definition: matroska.h:96
uint64_t start
Definition: matroskadec.c:313
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:70
int nb_index_entries
Definition: avformat.h:1112
#define MATROSKA_ID_SEEKENTRY
Definition: matroska.h:217
Describe the class of an AVClass context structure.
Definition: log.h:67
EbmlList pos
Definition: matroskadec.c:283
uint64_t u
Definition: matroskadec.c:104
#define MATROSKA_ID_CHAPCOUNTRY
Definition: matroska.h:257
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
#define MATROSKA_ID_EDITIONENTRY
Definition: matroska.h:250
int index
Definition: gxfenc.c:89
#define MATROSKA_ID_BLOCKGROUP
Definition: matroska.h:227
#define MATROSKA_ID_VIDEOPIXELHEIGHT
Definition: matroska.h:115
int32_t roll
Rotation around the forward vector [-180, 180].
Definition: spherical.h:128
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord, int maxc)
Definition: vf_neighbor.c:197
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#define isnan(x)
Definition: libm.h:340
Mastering display metadata capable of representing the color volume of the display used to master the...
#define MATROSKA_ID_CUEDURATION
Definition: matroska.h:198
AVStream * stream
Definition: matroskadec.c:249
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, int *buf_size, int type, uint32_t **lace_buf, int *laces)
Definition: matroskadec.c:3008
#define MATROSKA_ID_CUETIME
Definition: matroska.h:191
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:277
#define MATROSKA_ID_ENCODINGSIGALGO
Definition: matroska.h:182
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3739
static EbmlSyntax matroska_track_encoding_encryption[]
Definition: matroskadec.c:509
Recommmends skipping the specified number of samples.
Definition: avcodec.h:1300
static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
Definition: matroskadec.c:2263
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1163
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:145
#define MATROSKA_ID_ENCODINGSIGKEYID
Definition: matroska.h:184
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
#define MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS
Definition: matroska.h:138
void ff_packet_list_free(AVPacketList **head, AVPacketList **tail)
Wipe the list and unref all the packets in it.
Definition: utils.c:1428
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int64_t pos)
Definition: matroskadec.c:1811
#define MATROSKA_ID_TITLE
Definition: matroska.h:68
#define snprintf
Definition: snprintf.h:34
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:456
AVFormatContext * ctx
Definition: matroskadec.c:341
#define MATROSKA_ID_TRACKVIDEO
Definition: matroska.h:81
int64_t discard_padding
Definition: matroskadec.c:324
int size
Definition: matroskadec.c:118
This structure describes how to handle spherical videos, outlining information about projection...
Definition: spherical.h:82
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
#define MATROSKA_ID_VIDEOPROJECTION
Definition: matroska.h:156
#define MATROSKA_ID_VIDEOCOLORMASTERINGMETA
Definition: matroska.h:144
size_t av_strlcat(char *dst, const char *src, size_t size)
Append the string src to the string dst, but to a total length of no more than size - 1 bytes...
Definition: avstring.c:93
#define MATROSKA_ID_VIDEOPROJECTIONPRIVATE
Definition: matroska.h:158
AVRational display_primaries[3][2]
CIE 1931 xy chromaticity coords of color primaries (r, g, b order).
mfxU16 profile
Definition: qsvenc.c:44
uint64_t field_order
Definition: matroskadec.c:196
#define AVPALETTE_COUNT
Definition: pixfmt.h:33
int seek_preroll
Audio only.
Definition: avcodec.h:4097
#define MATROSKA_ID_VIDEOFRAMERATE
Definition: matroska.h:111
int64_t end_time_ns
Definition: matroskadec.c:3841
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
#define MATROSKA_ID_ATTACHMENTS
Definition: matroska.h:61
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static EbmlSyntax ebml_syntax[3]
Definition: matroskadec.c:397
#define MATROSKA_ID_TRACKOPERATION
Definition: matroska.h:83
int64_t pos
Definition: matroskadec.c:121
#define flags(name, subs,...)
Definition: cbs_av1.c:564
#define MATROSKA_ID_CHAPTERDISPLAY
Definition: matroska.h:254
MatroskaLevel1Element level1_elems[64]
Definition: matroskadec.c:379
uint8_t level
Definition: svq3.c:207
#define MATROSKA_ID_FILENAME
Definition: matroska.h:244
#define MATROSKA_ID_BLOCKADDITIONAL
Definition: matroska.h:231
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
uint32_t bound_top
Distance from the top edge.
Definition: spherical.h:168
static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track)
Definition: matroskadec.c:2164
const int avpriv_mpeg4audio_sample_rates[16]
Definition: mpeg4audio.c:62
const AVMetadataConv ff_mkv_metadata_conv[]
Definition: matroska.c:141
static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
Definition: matroskadec.c:2018
#define CONFIG_LZO
Definition: config.h:569
#define MATROSKA_ID_CODECID
Definition: matroska.h:88
#define MATROSKA_ID_VIDEOFIELDORDER
Definition: matroska.h:122
static EbmlSyntax matroska_seekhead[2]
Definition: matroskadec.c:397
int sample_rate
Audio only.
Definition: avcodec.h:4067
#define MATROSKA_ID_VIDEOALPHAMODE
Definition: matroska.h:124
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
int ff_packet_list_get(AVPacketList **head, AVPacketList **tail, AVPacket *pkt)
Remove the oldest AVPacket in the list and return it.
Definition: utils.c:1559
A reference to a data buffer.
Definition: buffer.h:81
full parsing and repack
Definition: avformat.h:800
int64_t reference
Definition: matroskadec.c:319
void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
Perform 4-bit block reordering for SIPR data.
Definition: rmsipr.c:41
Main libavformat public API header.
uint64_t buf_timecode
Definition: matroskadec.c:216
#define MATROSKA_ID_ENCODINGENCAESSETTINGS
Definition: matroska.h:179
uint64_t num
Definition: matroskadec.c:230
attribute_deprecated int64_t convergence_duration
Definition: avcodec.h:1506
#define MATROSKA_ID_CUETRACK
Definition: matroska.h:195
static EbmlSyntax matroska_track_encoding_compression[]
Definition: matroskadec.c:503
EbmlType
Definition: matroskadec.c:83
#define MATROSKA_ID_SEEKPOSITION
Definition: matroska.h:221
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
Definition: matroskadec.c:776
#define MATROSKA_ID_CODECDELAY
Definition: matroska.h:94
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
#define MATROSKA_ID_CHAPTERTIMESTART
Definition: matroska.h:252
double time_scale
Definition: matroskadec.c:237
enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos)
Converts swscale x/y chroma position to AVChromaLocation.
Definition: utils.c:365
#define MATROSKA_ID_VIDEOCOLORRANGE
Definition: matroska.h:137
enum AVSphericalProjection projection
Projection type.
Definition: spherical.h:86
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:81
char * string
Definition: matroskadec.c:288
static EbmlSyntax matroska_chapters[2]
Definition: matroskadec.c:397
static double c[64]
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1625
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
AVBufferRef * buf
Definition: matroskadec.c:119
char * doctype
Definition: matroskadec.c:128
static EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:681
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
int den
Denominator.
Definition: rational.h:60
static EbmlSyntax matroska_blockgroup[8]
Definition: matroskadec.c:397
#define MATROSKA_ID_ENCODINGSIGNATURE
Definition: matroska.h:185
#define MATROSKA_ID_SEGMENT
Definition: matroska.h:53
uint32_t id
Definition: matroskadec.c:98
unsigned bps
Definition: movenc.c:1497
size_t data_offset
Definition: matroskadec.c:101
static EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:661
MatroskaTagTarget target
Definition: matroskadec.c:303
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
The optional settings (rendering instructions) that immediately follow the timestamp specifier of a W...
Definition: avcodec.h:1346
#define MKBETAG(a, b, c, d)
Definition: common.h:367
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length, int64_t pos)
Definition: matroskadec.c:1008
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:790
#define MATROSKA_ID_SEEKHEAD
Definition: matroska.h:60
static int matroska_parse_webvtt(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int data_len, uint64_t timecode, uint64_t duration, int64_t pos)
Definition: matroskadec.c:3302
#define EBML_ID_HEADER
Definition: matroska.h:33
int skip_to_keyframe
Indicates that everything up to the next keyframe should be discarded.
Definition: avformat.h:1144
#define MATROSKA_ID_ENCODINGCOMPRESSION
Definition: matroska.h:174
#define MATROSKA_ID_CLUSTERPREVSIZE
Definition: matroska.h:226
#define av_free(p)
char * value
Definition: dict.h:87
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
#define MATROSKA_ID_POINTENTRY
Definition: matroska.h:188
int len
static EbmlSyntax matroska_attachments[2]
Definition: matroskadec.c:397
#define update_pos(td, mb_y, mb_x)
Definition: vp8.c:2355
#define MATROSKA_ID_FILEUID
Definition: matroska.h:247
static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data, int size, int64_t pos, uint64_t cluster_time, uint64_t block_duration, int is_keyframe, uint8_t *additional, uint64_t additional_id, int additional_size, int64_t cluster_pos, int64_t discard_padding)
Definition: matroskadec.c:3543
#define MATROSKA_ID_VIDEOPIXELCROPL
Definition: matroska.h:118
void * priv_data
Format private data.
Definition: avformat.h:1386
uint64_t non_simple
Definition: matroskadec.c:320
#define MATROSKA_ID_CHAPTERUID
Definition: matroska.h:262
static EbmlSyntax matroska_track_encoding[6]
Definition: matroskadec.c:397
uint32_t bound_left
Distance from the left edge.
Definition: spherical.h:167
uint64_t layout
static EbmlSyntax matroska_tag[3]
Definition: matroskadec.c:397
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3999
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3971
#define MATROSKA_ID_VIDEOCOLORMAXFALL
Definition: matroska.h:142
#define MATROSKA_ID_VIDEODISPLAYUNIT
Definition: matroska.h:120
int channels
Audio only.
Definition: avcodec.h:4063
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
Definition: matroskadec.c:901
#define MATROSKA_ID_TRACKMAXBLKADDID
Definition: matroska.h:108
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1476
#define EBML_ID_EBMLMAXSIZELENGTH
Definition: matroska.h:39
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1473
MatroskaTrackEncryption encryption
Definition: matroskadec.c:146
static EbmlSyntax * ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
Definition: matroskadec.c:1060
#define MATROSKA_ID_CHAPSTRING
Definition: matroska.h:255
#define MATROSKA_ID_VIDEOCOLORCBSUBHORZ
Definition: matroska.h:133
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:766
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
#define MATROSKA_ID_TAGSTRING
Definition: matroska.h:205
static const AVOption options[]
Definition: matroskadec.c:4233
const CodecMime ff_mkv_image_mime_tags[]
Definition: matroska.c:122
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
#define av_malloc_array(a, b)
static EbmlSyntax matroska_index_pos[]
Definition: matroskadec.c:631
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:358
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3961
static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps, double min_buffer, double *buffer, double *sec_to_download, AVFormatContext *s, int64_t cues_start)
Definition: matroskadec.c:3925
uint64_t transfer_characteristics
Definition: matroskadec.c:172
const char int length
Definition: avisynth_c.h:860
static int ebml_read_float(AVIOContext *pb, int size, double *num)
Definition: matroskadec.c:938
#define MATROSKA_ID_DURATION
Definition: matroska.h:67
uint64_t length
Definition: matroskadec.c:314
static int matroska_aac_profile(char *codec_id)
Definition: matroskadec.c:1936
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:329
int stream_index
Definition: avcodec.h:1479
#define EBML_ID_DOCTYPEVERSION
Definition: matroska.h:41
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3003
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
#define CUES_START
Definition: matroska.h:372
#define CONFIG_BZLIB
Definition: config.h:500
#define MKTAG(a, b, c, d)
Definition: common.h:366
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:936
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1005
#define MATROSKA_ID_ATTACHEDFILE
Definition: matroska.h:242
#define MATROSKA_ID_VIDEOCOLOR_GY
Definition: matroska.h:148
#define LEVEL_ENDED
Definition: matroskadec.c:74
This structure stores compressed data.
Definition: avcodec.h:1454
static EbmlSyntax matroska_chapter_display[]
Definition: matroskadec.c:598
#define MATROSKA_ID_CODECSTATE
Definition: matroska.h:238
uint64_t default_duration
Definition: matroskadec.c:238
AVInputFormat ff_webm_dash_manifest_demuxer
Definition: matroskadec.c:4259
#define MATROSKA_ID_VIDEOCOLOR_RY
Definition: matroska.h:146
#define MATROSKA_ID_CODECINFOURL
Definition: matroska.h:91
static EbmlSyntax matroska_cluster_enter[]
Definition: matroskadec.c:744
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
#define MATROSKA_ID_VIDEOPIXELWIDTH
Definition: matroska.h:114
static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1884
static int matroska_parse_frame(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, AVBufferRef *buf, uint8_t *data, int pkt_size, uint64_t timecode, uint64_t lace_duration, int64_t pos, int is_keyframe, uint8_t *additional, uint64_t additional_id, int additional_size, int64_t discard_padding)
Definition: matroskadec.c:3417
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:963
#define MATROSKA_ID_TRACKAUDIO
Definition: matroska.h:82
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define av_unused
Definition: attributes.h:125
#define MATROSKA_ID_ENCODINGSCOPE
Definition: matroska.h:172
const CodecTags ff_mkv_codec_tags[]
Definition: matroska.c:29
#define MATROSKA_ID_ENCODINGENCKEYID
Definition: matroska.h:181
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
#define MATROSKA_ID_DISCARDPADDING
Definition: matroska.h:239
static int is_ebml_id_valid(uint32_t id)
Definition: matroskadec.c:1115
uint32_t palette[AVPALETTE_COUNT]
Definition: matroskadec.c:254
#define NEEDS_CHECKING
Definition: matroskadec.c:72
static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
Definition: matroskadec.c:4006
static const char *const matroska_doctypes[]
Definition: matroskadec.c:750
static uint8_t tmp[11]
Definition: aes_ctr.c:26
uint64_t attachuid
Definition: matroskadec.c:299