FFmpeg  4.4.4
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"
52 
53 #include "avformat.h"
54 #include "avio_internal.h"
55 #include "internal.h"
56 #include "isom.h"
57 #include "matroska.h"
58 #include "oggdec.h"
59 /* For ff_codec_get_id(). */
60 #include "riff.h"
61 #include "rmsipr.h"
62 
63 #if CONFIG_BZLIB
64 #include <bzlib.h>
65 #endif
66 #if CONFIG_ZLIB
67 #include <zlib.h>
68 #endif
69 
70 #include "qtpalette.h"
71 
72 #define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
73 #define NEEDS_CHECKING 2 /* Indicates that some error checks
74  * still need to be performed */
75 #define LEVEL_ENDED 3 /* return value of ebml_parse when the
76  * syntax level used for parsing ended. */
77 #define SKIP_THRESHOLD 1024 * 1024 /* In non-seekable mode, if more than SKIP_THRESHOLD
78  * of unkown, potentially damaged data is encountered,
79  * it is considered an error. */
80 #define UNKNOWN_EQUIV 50 * 1024 /* An unknown element is considered equivalent
81  * to this many bytes of unknown data for the
82  * SKIP_THRESHOLD check. */
83 
84 typedef enum {
89  EBML_STR,
91  EBML_BIN,
97 
98 typedef struct CountedElement {
99  union {
100  uint64_t u;
101  int64_t i;
102  double f;
103  char *s;
104  } el;
105  unsigned count;
107 
108 typedef const struct EbmlSyntax {
109  uint32_t id;
113  size_t data_offset;
114  union {
115  int64_t i;
116  uint64_t u;
117  double f;
118  const char *s;
119  const struct EbmlSyntax *n;
120  } def;
121 } EbmlSyntax;
122 
123 typedef struct EbmlList {
124  int nb_elem;
125  unsigned int alloc_elem_size;
126  void *elem;
128 
129 typedef struct EbmlBin {
130  int size;
133  int64_t pos;
135 
136 typedef struct Ebml {
137  uint64_t version;
138  uint64_t max_size;
139  uint64_t id_length;
140  char *doctype;
141  uint64_t doctype_version;
142 } Ebml;
143 
144 typedef struct MatroskaTrackCompression {
145  uint64_t algo;
148 
149 typedef struct MatroskaTrackEncryption {
150  uint64_t algo;
153 
154 typedef struct MatroskaTrackEncoding {
155  uint64_t scope;
156  uint64_t type;
160 
161 typedef struct MatroskaMasteringMeta {
162  double r_x;
163  double r_y;
164  double g_x;
165  double g_y;
166  double b_x;
167  double b_y;
168  double white_x;
169  double white_y;
173 
174 typedef struct MatroskaTrackVideoColor {
177  uint64_t chroma_sub_horz;
178  uint64_t chroma_sub_vert;
179  uint64_t cb_sub_horz;
180  uint64_t cb_sub_vert;
183  uint64_t range;
184  uint64_t transfer_characteristics;
185  uint64_t primaries;
186  uint64_t max_cll;
187  uint64_t max_fall;
190 
191 typedef struct MatroskaTrackVideoProjection {
192  uint64_t type;
193  EbmlBin private;
194  double yaw;
195  double pitch;
196  double roll;
198 
199 typedef struct MatroskaTrackVideo {
200  double frame_rate;
201  uint64_t display_width;
202  uint64_t display_height;
203  uint64_t pixel_width;
204  uint64_t pixel_height;
206  uint64_t display_unit;
207  uint64_t interlaced;
208  uint64_t field_order;
209  uint64_t stereo_mode;
210  uint64_t alpha_mode;
214 
215 typedef struct MatroskaTrackAudio {
216  double samplerate;
218  uint64_t bitdepth;
219  uint64_t channels;
220 
221  /* real audio header (extracted from extradata) */
224  int frame_size;
225  int sub_packet_size;
227  int pkt_cnt;
228  uint64_t buf_timecode;
229  uint8_t *buf;
231 
232 typedef struct MatroskaTrackPlane {
233  uint64_t uid;
234  uint64_t type;
236 
237 typedef struct MatroskaTrackOperation {
240 
241 typedef struct MatroskaTrack {
242  uint64_t num;
243  uint64_t uid;
244  uint64_t type;
245  char *name;
246  char *codec_id;
248  char *language;
249  double time_scale;
251  uint64_t flag_default;
252  uint64_t flag_forced;
253  uint64_t flag_comment;
258  uint64_t seek_preroll;
263  uint64_t codec_delay;
265 
267  int64_t end_timecode;
268  int ms_compat;
269  int needs_decoding;
271 
275 
276 typedef struct MatroskaAttachment {
277  uint64_t uid;
278  char *filename;
279  char *description;
280  char *mime;
282 
285 
286 typedef struct MatroskaChapter {
287  uint64_t start;
288  uint64_t end;
289  uint64_t uid;
290  char *title;
291 
294 
295 typedef struct MatroskaIndexPos {
296  uint64_t track;
297  uint64_t pos;
299 
300 typedef struct MatroskaIndex {
301  uint64_t time;
304 
305 typedef struct MatroskaTag {
306  char *name;
307  char *string;
308  char *lang;
309  uint64_t def;
312 
313 typedef struct MatroskaTagTarget {
314  char *type;
315  uint64_t typevalue;
316  uint64_t trackuid;
317  uint64_t chapteruid;
318  uint64_t attachuid;
320 
321 typedef struct MatroskaTags {
323  EbmlList tag;
324 } MatroskaTags;
325 
326 typedef struct MatroskaSeekhead {
327  uint64_t id;
328  uint64_t pos;
330 
331 typedef struct MatroskaLevel {
332  uint64_t start;
333  uint64_t length;
335 
336 typedef struct MatroskaBlock {
337  uint64_t duration;
339  uint64_t non_simple;
341  uint64_t additional_id;
344 } MatroskaBlock;
345 
346 typedef struct MatroskaCluster {
348  uint64_t timecode;
349  int64_t pos;
351 
352 typedef struct MatroskaLevel1Element {
353  int64_t pos;
354  uint32_t id;
355  int parsed;
357 
358 typedef struct MatroskaDemuxContext {
359  const AVClass *class;
361 
362  /* EBML stuff */
365  uint32_t current_id;
366  int64_t resync_pos;
368 
369  uint64_t time_scale;
370  double duration;
371  char *title;
372  char *muxingapp;
377  EbmlList index;
380 
381  /* byte position of the segment inside the stream */
382  int64_t segment_start;
383 
385 
386  /* the packet queue */
389 
390  int done;
391 
392  /* What to skip before effectively reading a packet. */
393  int skip_to_keyframe;
395 
396  /* File has a CUES element, but we defer parsing until it is needed. */
398 
399  /* Level1 elements and whether they were read yet */
401  int num_level1_elems;
402 
404 
405  /* WebM DASH Manifest live flag */
406  int is_live;
407 
408  /* Bandwidth value for WebM DASH Manifest */
409  int bandwidth;
411 
412 #define CHILD_OF(parent) { .def = { .n = parent } }
413 
414 // The following forward declarations need their size because
415 // a tentative definition with internal linkage must not be an
416 // incomplete type (6.7.2 in C90, 6.9.2 in C99).
417 // Removing the sizes breaks MSVC.
424 
425 static EbmlSyntax ebml_header[] = {
426  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
427  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, 0, offsetof(Ebml, max_size), { .u = 8 } },
428  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, 0, offsetof(Ebml, id_length), { .u = 4 } },
429  { EBML_ID_DOCTYPE, EBML_STR, 0, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
430  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
434 };
435 
437  { EBML_ID_HEADER, EBML_NEST, 0, 0, 0, { .n = ebml_header } },
439  { 0 }
440 };
441 
442 static EbmlSyntax matroska_info[] = {
443  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
445  { MATROSKA_ID_TITLE, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, title) },
447  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, muxingapp) },
448  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, 0, offsetof(MatroskaDemuxContext, date_utc) },
451 };
452 
460  { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_x) },
461  { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_y) },
462  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 1, 0, offsetof(MatroskaMasteringMeta, min_luminance) },
463  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, max_luminance) },
465 };
466 
468  { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
469  { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u = 0 } },
470  { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz) },
471  { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert) },
472  { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz) },
473  { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert) },
480  { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_fall) },
483 };
484 
488  { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f = 0.0 } },
489  { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f = 0.0 } },
490  { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f = 0.0 } },
492 };
493 
494 static EbmlSyntax matroska_track_video[] = {
495  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideo, frame_rate) },
496  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
497  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
498  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_width) },
499  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_height) },
500  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideo, color_space) },
501  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, alpha_mode), { .u = 0 } },
514 };
515 
516 static EbmlSyntax matroska_track_audio[] = {
517  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
518  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
519  { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, bitdepth) },
520  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
522 };
523 
528 };
529 
531  { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
539 };
541  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
542  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
547 };
548 
552 };
553 
554 static EbmlSyntax matroska_track_plane[] = {
558 };
559 
561  { MATROSKA_ID_TRACKPLANE, EBML_NEST, 0, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
563 };
564 
568 };
569 
570 static EbmlSyntax matroska_track[] = {
571  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, 0, offsetof(MatroskaTrack, num) },
572  { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTrack, name) },
573  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, uid) },
574  { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrack, type) },
575  { MATROSKA_ID_CODECID, EBML_STR, 0, 0, offsetof(MatroskaTrack, codec_id) },
576  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrack, codec_priv) },
577  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, codec_delay), { .u = 0 } },
578  { MATROSKA_ID_TRACKLANGUAGE, EBML_STR, 0, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
579  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, 0, offsetof(MatroskaTrack, default_duration) },
580  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
581  { MATROSKA_ID_TRACKFLAGCOMMENTARY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_comment), { .u = 0 } },
582  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
583  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
584  { MATROSKA_ID_TRACKFLAGHEARINGIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_hearingimpaired), { .u = 0 } },
585  { MATROSKA_ID_TRACKFLAGVISUALIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_visualimpaired), { .u = 0 } },
586  { MATROSKA_ID_TRACKFLAGTEXTDESCRIPTIONS, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_textdescriptions), { .u = 0 } },
587  { MATROSKA_ID_TRACKFLAGORIGINAL, EBML_UINT, 1, 0, offsetof(MatroskaTrack, flag_original), {.u = 0 } },
588  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
589  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
590  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
592  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, max_block_additional_id), { .u = 0 } },
593  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, 0, offsetof(MatroskaTrack, seek_preroll), { .u = 0 } },
603 };
604 
605 static EbmlSyntax matroska_tracks[] = {
606  { MATROSKA_ID_TRACKENTRY, EBML_NEST, 0, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
608 };
609 
610 static EbmlSyntax matroska_attachment[] = {
611  { MATROSKA_ID_FILEUID, EBML_UINT, 0, 0, offsetof(MatroskaAttachment, uid) },
612  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, filename) },
613  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, 0, offsetof(MatroskaAttachment, mime) },
614  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, 0, offsetof(MatroskaAttachment, bin) },
615  { MATROSKA_ID_FILEDESC, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, description) },
617 };
618 
619 static EbmlSyntax matroska_attachments[] = {
620  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, 0, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
622 };
623 
625  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaChapter, title) },
629 };
630 
632  { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
633  { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
634  { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaChapter, uid) },
641 };
642 
643 static EbmlSyntax matroska_chapter[] = {
644  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, 0, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
650 };
651 
652 static EbmlSyntax matroska_chapters[] = {
653  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter } },
655 };
656 
657 static EbmlSyntax matroska_index_pos[] = {
658  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, track) },
664 };
665 
666 static EbmlSyntax matroska_index_entry[] = {
667  { MATROSKA_ID_CUETIME, EBML_UINT, 0, 0, offsetof(MatroskaIndex, time) },
670 };
671 
672 static EbmlSyntax matroska_index[] = {
675 };
676 
677 static EbmlSyntax matroska_simpletag[] = {
678  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTag, name) },
679  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaTag, string) },
680  { MATROSKA_ID_TAGLANG, EBML_STR, 0, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
681  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
682  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
683  { MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
685 };
686 
687 static EbmlSyntax matroska_tagtargets[] = {
689  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
690  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, trackuid), { .u = 0 } },
691  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, chapteruid), { .u = 0 } },
692  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, attachuid), { .u = 0 } },
694 };
695 
696 static EbmlSyntax matroska_tag[] = {
697  { MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
698  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
700 };
701 
702 static EbmlSyntax matroska_tags[] = {
703  { MATROSKA_ID_TAG, EBML_NEST, 0, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
705 };
706 
708  { MATROSKA_ID_SEEKID, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, id) },
709  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
711 };
712 
713 static EbmlSyntax matroska_seekhead[] = {
714  { MATROSKA_ID_SEEKENTRY, EBML_NEST, 0, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
716 };
717 
718 static EbmlSyntax matroska_segment[] = {
720  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, 0, { .n = matroska_info } },
721  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tracks } },
723  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_chapters } },
724  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, 0, { .n = matroska_index } },
725  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tags } },
726  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, 0, { .n = matroska_seekhead } },
727  { 0 } /* We don't want to go back to level 0, so don't add the parent. */
728 };
729 
730 static EbmlSyntax matroska_segments[] = {
731  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, 0, { .n = matroska_segment } },
732  { 0 }
733 };
734 
735 static EbmlSyntax matroska_blockmore[] = {
736  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, 0, offsetof(MatroskaBlock,additional_id), { .u = 1 } },
737  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, 0, offsetof(MatroskaBlock,additional) },
739 };
740 
742  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, 0, {.n = matroska_blockmore} },
744 };
745 
746 static EbmlSyntax matroska_blockgroup[] = {
747  { MATROSKA_ID_BLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
750  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, 0, offsetof(MatroskaBlock, discard_padding) },
751  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 1, 0, offsetof(MatroskaBlock, reference) },
753  { 1, EBML_UINT, 0, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
755 };
756 
757 // The following array contains SimpleBlock and BlockGroup twice
758 // in order to reuse the other values for matroska_cluster_enter.
760  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
761  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, 0, { .n = matroska_blockgroup } },
762  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, 0, offsetof(MatroskaCluster, timecode) },
768 };
769 
771  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, 0, { .n = &matroska_cluster_parsing[2] } },
772  { 0 }
773 };
774 #undef CHILD_OF
775 
776 static const CodecMime mkv_image_mime_tags[] = {
777  {"image/gif" , AV_CODEC_ID_GIF},
778  {"image/jpeg" , AV_CODEC_ID_MJPEG},
779  {"image/png" , AV_CODEC_ID_PNG},
780  {"image/tiff" , AV_CODEC_ID_TIFF},
781 
782  {"" , AV_CODEC_ID_NONE}
783 };
784 
785 static const CodecMime mkv_mime_tags[] = {
786  {"text/plain" , AV_CODEC_ID_TEXT},
787  {"application/x-truetype-font", AV_CODEC_ID_TTF},
788  {"application/x-font" , AV_CODEC_ID_TTF},
789  {"application/vnd.ms-opentype", AV_CODEC_ID_OTF},
790  {"binary" , AV_CODEC_ID_BIN_DATA},
791 
792  {"" , AV_CODEC_ID_NONE}
793 };
794 
795 static const char *const matroska_doctypes[] = { "matroska", "webm" };
796 
798 
799 /*
800  * This function prepares the status for parsing of level 1 elements.
801  */
802 static int matroska_reset_status(MatroskaDemuxContext *matroska,
803  uint32_t id, int64_t position)
804 {
805  int64_t err = 0;
806  if (position >= 0) {
807  err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
808  if (err > 0)
809  err = 0;
810  } else
811  position = avio_tell(matroska->ctx->pb);
812 
813  matroska->current_id = id;
814  matroska->num_levels = 1;
815  matroska->unknown_count = 0;
816  matroska->resync_pos = position;
817  if (id)
818  matroska->resync_pos -= (av_log2(id) + 7) / 8;
819 
820  return err;
821 }
822 
823 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
824 {
825  AVIOContext *pb = matroska->ctx->pb;
826  uint32_t id;
827 
828  /* Try to seek to the last position to resync from. If this doesn't work,
829  * we resync from the earliest position available: The start of the buffer. */
830  if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
831  av_log(matroska->ctx, AV_LOG_WARNING,
832  "Seek to desired resync point failed. Seeking to "
833  "earliest point available instead.\n");
834  avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
835  last_pos + 1), SEEK_SET);
836  }
837 
838  id = avio_rb32(pb);
839 
840  // try to find a toplevel element
841  while (!avio_feof(pb)) {
842  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
843  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
845  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
846  /* Prepare the context for parsing of a level 1 element. */
847  matroska_reset_status(matroska, id, -1);
848  /* Given that we are here means that an error has occurred,
849  * so treat the segment as unknown length in order not to
850  * discard valid data that happens to be beyond the designated
851  * end of the segment. */
852  matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
853  return 0;
854  }
855  id = (id << 8) | avio_r8(pb);
856  }
857 
858  matroska->done = 1;
859  return pb->error ? pb->error : AVERROR_EOF;
860 }
861 
862 /*
863  * Read: an "EBML number", which is defined as a variable-length
864  * array of bytes. The first byte indicates the length by giving a
865  * number of 0-bits followed by a one. The position of the first
866  * "one" bit inside the first byte indicates the length of this
867  * number.
868  * Returns: number of bytes read, < 0 on error
869  */
870 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
871  int max_size, uint64_t *number, int eof_forbidden)
872 {
873  int read, n = 1;
874  uint64_t total;
875  int64_t pos;
876 
877  /* The first byte tells us the length in bytes - except when it is zero. */
878  total = avio_r8(pb);
879  if (pb->eof_reached)
880  goto err;
881 
882  /* get the length of the EBML number */
883  read = 8 - ff_log2_tab[total];
884 
885  if (!total || read > max_size) {
886  pos = avio_tell(pb) - 1;
887  if (!total) {
888  av_log(matroska->ctx, AV_LOG_ERROR,
889  "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
890  "of an EBML number\n", pos, pos);
891  } else {
892  av_log(matroska->ctx, AV_LOG_ERROR,
893  "Length %d indicated by an EBML number's first byte 0x%02x "
894  "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
895  read, (uint8_t) total, pos, pos, max_size);
896  }
897  return AVERROR_INVALIDDATA;
898  }
899 
900  /* read out length */
901  total ^= 1 << ff_log2_tab[total];
902  while (n++ < read)
903  total = (total << 8) | avio_r8(pb);
904 
905  if (pb->eof_reached) {
906  eof_forbidden = 1;
907  goto err;
908  }
909 
910  *number = total;
911 
912  return read;
913 
914 err:
915  pos = avio_tell(pb);
916  if (pb->error) {
917  av_log(matroska->ctx, AV_LOG_ERROR,
918  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
919  pos, pos);
920  return pb->error;
921  }
922  if (eof_forbidden) {
923  av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
924  "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
925  return AVERROR(EIO);
926  }
927  return AVERROR_EOF;
928 }
929 
930 /**
931  * Read a EBML length value.
932  * This needs special handling for the "unknown length" case which has multiple
933  * encodings.
934  */
935 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
936  uint64_t *number)
937 {
938  int res = ebml_read_num(matroska, pb, 8, number, 1);
939  if (res > 0 && *number + 1 == 1ULL << (7 * res))
940  *number = EBML_UNKNOWN_LENGTH;
941  return res;
942 }
943 
944 /*
945  * Read the next element as an unsigned int.
946  * Returns NEEDS_CHECKING unless size == 0.
947  */
948 static int ebml_read_uint(AVIOContext *pb, int size,
949  uint64_t default_value, uint64_t *num)
950 {
951  int n = 0;
952 
953  if (size == 0) {
954  *num = default_value;
955  return 0;
956  }
957  /* big-endian ordering; build up number */
958  *num = 0;
959  while (n++ < size)
960  *num = (*num << 8) | avio_r8(pb);
961 
962  return NEEDS_CHECKING;
963 }
964 
965 /*
966  * Read the next element as a signed int.
967  * Returns NEEDS_CHECKING unless size == 0.
968  */
969 static int ebml_read_sint(AVIOContext *pb, int size,
970  int64_t default_value, int64_t *num)
971 {
972  int n = 1;
973 
974  if (size == 0) {
975  *num = default_value;
976  return 0;
977  } else {
978  *num = sign_extend(avio_r8(pb), 8);
979 
980  /* big-endian ordering; build up number */
981  while (n++ < size)
982  *num = ((uint64_t)*num << 8) | avio_r8(pb);
983  }
984 
985  return NEEDS_CHECKING;
986 }
987 
988 /*
989  * Read the next element as a float.
990  * Returns 0 if size == 0, NEEDS_CHECKING or < 0 on obvious failure.
991  */
992 static int ebml_read_float(AVIOContext *pb, int size,
993  double default_value, double *num)
994 {
995  if (size == 0) {
996  *num = default_value;
997  return 0;
998  } else if (size == 4) {
999  *num = av_int2float(avio_rb32(pb));
1000  } else if (size == 8) {
1001  *num = av_int2double(avio_rb64(pb));
1002  } else
1003  return AVERROR_INVALIDDATA;
1004 
1005  return NEEDS_CHECKING;
1007 
1008 /*
1009  * Read the next element as an ASCII string.
1010  * 0 is success, < 0 or NEEDS_CHECKING is failure.
1011  */
1012 static int ebml_read_ascii(AVIOContext *pb, int size,
1013  const char *default_value, char **str)
1014 {
1015  char *res;
1016  int ret;
1017 
1018  if (size == 0 && default_value) {
1019  res = av_strdup(default_value);
1020  if (!res)
1021  return AVERROR(ENOMEM);
1022  } else {
1023  /* EBML strings are usually not 0-terminated, so we allocate one
1024  * byte more, read the string and NUL-terminate it ourselves. */
1025  if (!(res = av_malloc(size + 1)))
1026  return AVERROR(ENOMEM);
1027  if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
1028  av_free(res);
1029  return ret < 0 ? ret : NEEDS_CHECKING;
1030  }
1031  (res)[size] = '\0';
1032  }
1033  av_free(*str);
1034  *str = res;
1035 
1036  return 0;
1038 
1039 /*
1040  * Read the next element as binary data.
1041  * 0 is success, < 0 or NEEDS_CHECKING is failure.
1042  */
1043 static int ebml_read_binary(AVIOContext *pb, int length,
1044  int64_t pos, EbmlBin *bin)
1045 {
1046  int ret;
1047 
1048  ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
1049  if (ret < 0)
1050  return ret;
1051  memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1052 
1053  bin->data = bin->buf->data;
1054  bin->size = length;
1055  bin->pos = pos;
1056  if ((ret = avio_read(pb, bin->data, length)) != length) {
1057  av_buffer_unref(&bin->buf);
1058  bin->data = NULL;
1059  bin->size = 0;
1060  return ret < 0 ? ret : NEEDS_CHECKING;
1061  }
1062 
1063  return 0;
1064 }
1066 /*
1067  * Read the next element, but only the header. The contents
1068  * are supposed to be sub-elements which can be read separately.
1069  * 0 is success, < 0 is failure.
1070  */
1071 static int ebml_read_master(MatroskaDemuxContext *matroska,
1072  uint64_t length, int64_t pos)
1073 {
1075 
1076  if (matroska->num_levels >= EBML_MAX_DEPTH) {
1077  av_log(matroska->ctx, AV_LOG_ERROR,
1078  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1079  return AVERROR(ENOSYS);
1080  }
1081 
1082  level = &matroska->levels[matroska->num_levels++];
1083  level->start = pos;
1084  level->length = length;
1085 
1086  return 0;
1088 
1089 /*
1090  * Read a signed "EBML number"
1091  * Return: number of bytes processed, < 0 on error
1092  */
1093 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1094  AVIOContext *pb, int64_t *num)
1095 {
1096  uint64_t unum;
1097  int res;
1098 
1099  /* read as unsigned number first */
1100  if ((res = ebml_read_num(matroska, pb, 8, &unum, 1)) < 0)
1101  return res;
1102 
1103  /* make signed (weird way) */
1104  *num = unum - ((1LL << (7 * res - 1)) - 1);
1105 
1106  return res;
1107 }
1108 
1109 static int ebml_parse(MatroskaDemuxContext *matroska,
1110  EbmlSyntax *syntax, void *data);
1111 
1112 static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1113 {
1114  int i;
1115 
1116  // Whoever touches this should be aware of the duplication
1117  // existing in matroska_cluster_parsing.
1118  for (i = 0; syntax[i].id; i++)
1119  if (id == syntax[i].id)
1120  break;
1121 
1122  return &syntax[i];
1123 }
1124 
1125 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1126  void *data)
1127 {
1128  int res;
1129 
1130  if (data) {
1131  for (int i = 0; syntax[i].id; i++) {
1132  void *dst = (char *)data + syntax[i].data_offset;
1133  switch (syntax[i].type) {
1134  case EBML_UINT:
1135  *(uint64_t *)dst = syntax[i].def.u;
1136  break;
1137  case EBML_SINT:
1138  *(int64_t *) dst = syntax[i].def.i;
1139  break;
1140  case EBML_FLOAT:
1141  *(double *) dst = syntax[i].def.f;
1142  break;
1143  case EBML_STR:
1144  case EBML_UTF8:
1145  // the default may be NULL
1146  if (syntax[i].def.s) {
1147  *(char**)dst = av_strdup(syntax[i].def.s);
1148  if (!*(char**)dst)
1149  return AVERROR(ENOMEM);
1150  }
1151  break;
1152  }
1153  }
1154 
1155  if (!matroska->levels[matroska->num_levels - 1].length) {
1156  matroska->num_levels--;
1157  return 0;
1158  }
1159  }
1160 
1161  do {
1162  res = ebml_parse(matroska, syntax, data);
1163  } while (!res);
1164 
1165  return res == LEVEL_ENDED ? 0 : res;
1166 }
1167 
1168 static int is_ebml_id_valid(uint32_t id)
1169 {
1170  // Due to endian nonsense in Matroska, the highest byte with any bits set
1171  // will contain the leading length bit. This bit in turn identifies the
1172  // total byte length of the element by its position within the byte.
1173  unsigned int bits = av_log2(id);
1174  return id && (bits + 7) / 8 == (8 - bits % 8);
1176 
1177 /*
1178  * Allocate and return the entry for the level1 element with the given ID. If
1179  * an entry already exists, return the existing entry.
1180  */
1182  uint32_t id, int64_t pos)
1183 {
1184  int i;
1185  MatroskaLevel1Element *elem;
1186 
1187  if (!is_ebml_id_valid(id))
1188  return NULL;
1189 
1190  // Some files link to all clusters; useless.
1191  if (id == MATROSKA_ID_CLUSTER)
1192  return NULL;
1193 
1194  // There can be multiple SeekHeads and Tags.
1195  for (i = 0; i < matroska->num_level1_elems; i++) {
1196  if (matroska->level1_elems[i].id == id) {
1197  if (matroska->level1_elems[i].pos == pos ||
1198  id != MATROSKA_ID_SEEKHEAD && id != MATROSKA_ID_TAGS)
1199  return &matroska->level1_elems[i];
1200  }
1201  }
1202 
1203  // Only a completely broken file would have more elements.
1204  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1205  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements.\n");
1206  return NULL;
1207  }
1208 
1209  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1210  *elem = (MatroskaLevel1Element){.id = id};
1211 
1212  return elem;
1213 }
1214 
1215 static int ebml_parse(MatroskaDemuxContext *matroska,
1216  EbmlSyntax *syntax, void *data)
1217 {
1218  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1219  // Forbid unknown-length EBML_NONE elements.
1221  [EBML_UINT] = 8,
1222  [EBML_SINT] = 8,
1223  [EBML_FLOAT] = 8,
1224  // max. 16 MB for strings
1225  [EBML_STR] = 0x1000000,
1226  [EBML_UTF8] = 0x1000000,
1227  // max. 256 MB for binary data
1228  [EBML_BIN] = 0x10000000,
1229  // no limits for anything else
1230  };
1231  AVIOContext *pb = matroska->ctx->pb;
1232  uint32_t id;
1233  uint64_t length;
1234  int64_t pos = avio_tell(pb), pos_alt;
1235  int res, update_pos = 1, level_check;
1236  MatroskaLevel1Element *level1_elem;
1237  MatroskaLevel *level = matroska->num_levels ? &matroska->levels[matroska->num_levels - 1] : NULL;
1238 
1239  if (!matroska->current_id) {
1240  uint64_t id;
1241  res = ebml_read_num(matroska, pb, 4, &id, 0);
1242  if (res < 0) {
1243  if (pb->eof_reached && res == AVERROR_EOF) {
1244  if (matroska->is_live)
1245  // in live mode, finish parsing if EOF is reached.
1246  return 1;
1247  if (level && pos == avio_tell(pb)) {
1248  if (level->length == EBML_UNKNOWN_LENGTH) {
1249  // Unknown-length levels automatically end at EOF.
1250  matroska->num_levels--;
1251  return LEVEL_ENDED;
1252  } else {
1253  av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
1254  "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
1255  }
1256  }
1257  }
1258  return res;
1259  }
1260  matroska->current_id = id | 1 << 7 * res;
1261  pos_alt = pos + res;
1262  } else {
1263  pos_alt = pos;
1264  pos -= (av_log2(matroska->current_id) + 7) / 8;
1265  }
1266 
1267  id = matroska->current_id;
1268 
1269  syntax = ebml_parse_id(syntax, id);
1270  if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1271  if (level && level->length == EBML_UNKNOWN_LENGTH) {
1272  // Unknown-length levels end when an element from an upper level
1273  // in the hierarchy is encountered.
1274  while (syntax->def.n) {
1275  syntax = ebml_parse_id(syntax->def.n, id);
1276  if (syntax->id) {
1277  matroska->num_levels--;
1278  return LEVEL_ENDED;
1279  }
1280  };
1281  }
1282 
1283  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32" at pos. "
1284  "%"PRId64"\n", id, pos);
1285  update_pos = 0; /* Don't update resync_pos as an error might have happened. */
1286  }
1287 
1288  if (data) {
1289  data = (char *) data + syntax->data_offset;
1290  if (syntax->list_elem_size) {
1291  EbmlList *list = data;
1292  void *newelem;
1293 
1294  if ((unsigned)list->nb_elem + 1 >= UINT_MAX / syntax->list_elem_size)
1295  return AVERROR(ENOMEM);
1296  newelem = av_fast_realloc(list->elem,
1297  &list->alloc_elem_size,
1298  (list->nb_elem + 1) * syntax->list_elem_size);
1299  if (!newelem)
1300  return AVERROR(ENOMEM);
1301  list->elem = newelem;
1302  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1303  memset(data, 0, syntax->list_elem_size);
1304  list->nb_elem++;
1305  }
1306  }
1307 
1308  if (syntax->type != EBML_STOP) {
1309  matroska->current_id = 0;
1310  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1311  return res;
1312 
1313  pos_alt += res;
1314 
1315  if (matroska->num_levels > 0) {
1316  if (length != EBML_UNKNOWN_LENGTH &&
1317  level->length != EBML_UNKNOWN_LENGTH) {
1318  uint64_t elem_end = pos_alt + length,
1319  level_end = level->start + level->length;
1320 
1321  if (elem_end < level_end) {
1322  level_check = 0;
1323  } else if (elem_end == level_end) {
1324  level_check = LEVEL_ENDED;
1325  } else {
1326  av_log(matroska->ctx, AV_LOG_ERROR,
1327  "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1328  "containing master element ending at 0x%"PRIx64"\n",
1329  pos, elem_end, level_end);
1330  return AVERROR_INVALIDDATA;
1331  }
1332  } else if (length != EBML_UNKNOWN_LENGTH) {
1333  level_check = 0;
1334  } else if (level->length != EBML_UNKNOWN_LENGTH) {
1335  av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1336  "at 0x%"PRIx64" inside parent with finite size\n", pos);
1337  return AVERROR_INVALIDDATA;
1338  } else {
1339  level_check = 0;
1340  if (id != MATROSKA_ID_CLUSTER && (syntax->type == EBML_LEVEL1
1341  || syntax->type == EBML_NEST)) {
1342  // According to the current specifications only clusters and
1343  // segments are allowed to be unknown-length. We also accept
1344  // other unknown-length master elements.
1345  av_log(matroska->ctx, AV_LOG_WARNING,
1346  "Found unknown-length element 0x%"PRIX32" other than "
1347  "a cluster at 0x%"PRIx64". Spec-incompliant, but "
1348  "parsing will nevertheless be attempted.\n", id, pos);
1349  update_pos = -1;
1350  }
1351  }
1352  } else
1353  level_check = 0;
1354 
1355  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1356  if (length != EBML_UNKNOWN_LENGTH) {
1357  av_log(matroska->ctx, AV_LOG_ERROR,
1358  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for element "
1359  "with ID 0x%"PRIX32" at 0x%"PRIx64"\n",
1360  length, max_lengths[syntax->type], id, pos);
1361  } else if (syntax->type != EBML_NONE) {
1362  av_log(matroska->ctx, AV_LOG_ERROR,
1363  "Element with ID 0x%"PRIX32" at pos. 0x%"PRIx64" has "
1364  "unknown length, yet the length of an element of its "
1365  "type must be known.\n", id, pos);
1366  } else {
1367  av_log(matroska->ctx, AV_LOG_ERROR,
1368  "Found unknown-length element with ID 0x%"PRIX32" at "
1369  "pos. 0x%"PRIx64" for which no syntax for parsing is "
1370  "available.\n", id, pos);
1371  }
1372  return AVERROR_INVALIDDATA;
1373  }
1374 
1375  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1376  // Loosing sync will likely manifest itself as encountering unknown
1377  // elements which are not reliably distinguishable from elements
1378  // belonging to future extensions of the format.
1379  // We use a heuristic to detect such situations: If the current
1380  // element is not expected at the current syntax level and there
1381  // were only a few unknown elements in a row, then the element is
1382  // skipped or considered defective based upon the length of the
1383  // current element (i.e. how much would be skipped); if there were
1384  // more than a few skipped elements in a row and skipping the current
1385  // element would lead us more than SKIP_THRESHOLD away from the last
1386  // known good position, then it is inferred that an error occurred.
1387  // The dependency on the number of unknown elements in a row exists
1388  // because the distance to the last known good position is
1389  // automatically big if the last parsed element was big.
1390  // In both cases, each unknown element is considered equivalent to
1391  // UNKNOWN_EQUIV of skipped bytes for the check.
1392  // The whole check is only done for non-seekable output, because
1393  // in this situation skipped data can't simply be rechecked later.
1394  // This is especially important when using unkown length elements
1395  // as the check for whether a child exceeds its containing master
1396  // element is not effective in this situation.
1397  if (update_pos) {
1398  matroska->unknown_count = 0;
1399  } else {
1400  int64_t dist = length + UNKNOWN_EQUIV * matroska->unknown_count++;
1401 
1402  if (matroska->unknown_count > 3)
1403  dist += pos_alt - matroska->resync_pos;
1404 
1405  if (dist > SKIP_THRESHOLD) {
1406  av_log(matroska->ctx, AV_LOG_ERROR,
1407  "Unknown element %"PRIX32" at pos. 0x%"PRIx64" with "
1408  "length 0x%"PRIx64" considered as invalid data. Last "
1409  "known good position 0x%"PRIx64", %d unknown elements"
1410  " in a row\n", id, pos, length, matroska->resync_pos,
1411  matroska->unknown_count);
1412  return AVERROR_INVALIDDATA;
1413  }
1414  }
1415  }
1416 
1417  if (update_pos > 0) {
1418  // We have found an element that is allowed at this place
1419  // in the hierarchy and it passed all checks, so treat the beginning
1420  // of the element as the "last known good" position.
1421  matroska->resync_pos = pos;
1422  }
1423 
1424  if (!data && length != EBML_UNKNOWN_LENGTH)
1425  goto skip;
1426  }
1427 
1428  switch (syntax->type) {
1429  case EBML_UINT:
1430  res = ebml_read_uint(pb, length, syntax->def.u, data);
1431  break;
1432  case EBML_SINT:
1433  res = ebml_read_sint(pb, length, syntax->def.i, data);
1434  break;
1435  case EBML_FLOAT:
1436  res = ebml_read_float(pb, length, syntax->def.f, data);
1437  break;
1438  case EBML_STR:
1439  case EBML_UTF8:
1440  res = ebml_read_ascii(pb, length, syntax->def.s, data);
1441  break;
1442  case EBML_BIN:
1443  res = ebml_read_binary(pb, length, pos_alt, data);
1444  break;
1445  case EBML_LEVEL1:
1446  case EBML_NEST:
1447  if ((res = ebml_read_master(matroska, length, pos_alt)) < 0)
1448  return res;
1449  if (id == MATROSKA_ID_SEGMENT)
1450  matroska->segment_start = pos_alt;
1451  if (id == MATROSKA_ID_CUES)
1452  matroska->cues_parsing_deferred = 0;
1453  if (syntax->type == EBML_LEVEL1 &&
1454  (level1_elem = matroska_find_level1_elem(matroska, syntax->id, pos))) {
1455  if (!level1_elem->pos) {
1456  // Zero is not a valid position for a level 1 element.
1457  level1_elem->pos = pos;
1458  } else if (level1_elem->pos != pos)
1459  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1460  level1_elem->parsed = 1;
1461  }
1462  if (res = ebml_parse_nest(matroska, syntax->def.n, data))
1463  return res;
1464  break;
1465  case EBML_STOP:
1466  return 1;
1467  skip:
1468  default:
1469  if (length) {
1470  int64_t res2;
1471  if (ffio_limit(pb, length) != length) {
1472  // ffio_limit emits its own error message,
1473  // so we don't have to.
1474  return AVERROR(EIO);
1475  }
1476  if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1477  // avio_skip might take us past EOF. We check for this
1478  // by skipping only length - 1 bytes, reading a byte and
1479  // checking the error flags. This is done in order to check
1480  // that the element has been properly skipped even when
1481  // no filesize (that ffio_limit relies on) is available.
1482  avio_r8(pb);
1483  res = NEEDS_CHECKING;
1484  } else
1485  res = res2;
1486  } else
1487  res = 0;
1488  }
1489  if (res) {
1490  if (res == NEEDS_CHECKING) {
1491  if (pb->eof_reached) {
1492  if (pb->error)
1493  res = pb->error;
1494  else
1495  res = AVERROR_EOF;
1496  } else
1497  goto level_check;
1498  }
1499 
1500  if (res == AVERROR_INVALIDDATA)
1501  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1502  else if (res == AVERROR(EIO))
1503  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1504  else if (res == AVERROR_EOF) {
1505  av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1506  res = AVERROR(EIO);
1507  }
1508 
1509  return res;
1510  }
1511 
1512 level_check:
1513  if (syntax->is_counted && data) {
1514  CountedElement *elem = data;
1515  if (elem->count != UINT_MAX)
1516  elem->count++;
1517  }
1518 
1519  if (level_check == LEVEL_ENDED && matroska->num_levels) {
1520  level = &matroska->levels[matroska->num_levels - 1];
1521  pos = avio_tell(pb);
1522 
1523  // Given that pos >= level->start no check for
1524  // level->length != EBML_UNKNOWN_LENGTH is necessary.
1525  while (matroska->num_levels && pos == level->start + level->length) {
1526  matroska->num_levels--;
1527  level--;
1528  }
1529  }
1530 
1531  return level_check;
1532 }
1533 
1534 static void ebml_free(EbmlSyntax *syntax, void *data)
1535 {
1536  int i, j;
1537  for (i = 0; syntax[i].id; i++) {
1538  void *data_off = (char *) data + syntax[i].data_offset;
1539  switch (syntax[i].type) {
1540  case EBML_STR:
1541  case EBML_UTF8:
1542  av_freep(data_off);
1543  break;
1544  case EBML_BIN:
1545  av_buffer_unref(&((EbmlBin *) data_off)->buf);
1546  break;
1547  case EBML_LEVEL1:
1548  case EBML_NEST:
1549  if (syntax[i].list_elem_size) {
1550  EbmlList *list = data_off;
1551  char *ptr = list->elem;
1552  for (j = 0; j < list->nb_elem;
1553  j++, ptr += syntax[i].list_elem_size)
1554  ebml_free(syntax[i].def.n, ptr);
1555  av_freep(&list->elem);
1556  list->nb_elem = 0;
1557  list->alloc_elem_size = 0;
1558  } else
1559  ebml_free(syntax[i].def.n, data_off);
1560  default:
1561  break;
1562  }
1563  }
1564 }
1565 
1566 /*
1567  * Autodetecting...
1568  */
1569 static int matroska_probe(const AVProbeData *p)
1570 {
1571  uint64_t total = 0;
1572  int len_mask = 0x80, size = 1, n = 1, i;
1573 
1574  /* EBML header? */
1575  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1576  return 0;
1577 
1578  /* length of header */
1579  total = p->buf[4];
1580  while (size <= 8 && !(total & len_mask)) {
1581  size++;
1582  len_mask >>= 1;
1583  }
1584  if (size > 8)
1585  return 0;
1586  total &= (len_mask - 1);
1587  while (n < size)
1588  total = (total << 8) | p->buf[4 + n++];
1589 
1590  if (total + 1 == 1ULL << (7 * size)){
1591  /* Unknown-length header - simply parse the whole buffer. */
1592  total = p->buf_size - 4 - size;
1593  } else {
1594  /* Does the probe data contain the whole header? */
1595  if (p->buf_size < 4 + size + total)
1596  return 0;
1597  }
1598 
1599  /* The header should contain a known document type. For now,
1600  * we don't parse the whole header but simply check for the
1601  * availability of that array of characters inside the header.
1602  * Not fully fool-proof, but good enough. */
1603  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1604  size_t probelen = strlen(matroska_doctypes[i]);
1605  if (total < probelen)
1606  continue;
1607  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1608  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1609  return AVPROBE_SCORE_MAX;
1610  }
1611 
1612  // probably valid EBML header but no recognized doctype
1613  return AVPROBE_SCORE_EXTENSION;
1614 }
1615 
1617  uint64_t num)
1618 {
1619  MatroskaTrack *tracks = matroska->tracks.elem;
1620  int i;
1621 
1622  for (i = 0; i < matroska->tracks.nb_elem; i++)
1623  if (tracks[i].num == num)
1624  return &tracks[i];
1625 
1626  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %"PRIu64"\n", num);
1627  return NULL;
1628 }
1629 
1630 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1631  MatroskaTrack *track)
1632 {
1633  MatroskaTrackEncoding *encodings = track->encodings.elem;
1634  uint8_t *data = *buf;
1635  int isize = *buf_size;
1636  uint8_t *pkt_data = NULL;
1637  uint8_t av_unused *newpktdata;
1638  int pkt_size = isize;
1639  int result = 0;
1640  int olen;
1641 
1642  if (pkt_size >= 10000000U)
1643  return AVERROR_INVALIDDATA;
1644 
1645  switch (encodings[0].compression.algo) {
1647  {
1648  int header_size = encodings[0].compression.settings.size;
1649  uint8_t *header = encodings[0].compression.settings.data;
1650 
1651  if (header_size && !header) {
1652  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1653  return -1;
1654  }
1655 
1656  if (!header_size)
1657  return 0;
1658 
1659  pkt_size = isize + header_size;
1660  pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1661  if (!pkt_data)
1662  return AVERROR(ENOMEM);
1663 
1664  memcpy(pkt_data, header, header_size);
1665  memcpy(pkt_data + header_size, data, isize);
1666  break;
1667  }
1668 #if CONFIG_LZO
1670  do {
1671  int insize = isize;
1672  olen = pkt_size *= 3;
1673  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1675  if (!newpktdata) {
1676  result = AVERROR(ENOMEM);
1677  goto failed;
1678  }
1679  pkt_data = newpktdata;
1680  result = av_lzo1x_decode(pkt_data, &olen, data, &insize);
1681  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1682  if (result) {
1683  result = AVERROR_INVALIDDATA;
1684  goto failed;
1685  }
1686  pkt_size -= olen;
1687  break;
1688 #endif
1689 #if CONFIG_ZLIB
1691  {
1692  z_stream zstream = { 0 };
1693  if (!pkt_size || inflateInit(&zstream) != Z_OK)
1694  return -1;
1695  zstream.next_in = data;
1696  zstream.avail_in = isize;
1697  do {
1698  pkt_size *= 3;
1699  newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1700  if (!newpktdata) {
1701  inflateEnd(&zstream);
1702  result = AVERROR(ENOMEM);
1703  goto failed;
1704  }
1705  pkt_data = newpktdata;
1706  zstream.avail_out = pkt_size - zstream.total_out;
1707  zstream.next_out = pkt_data + zstream.total_out;
1708  result = inflate(&zstream, Z_NO_FLUSH);
1709  } while (result == Z_OK && pkt_size < 10000000);
1710  pkt_size = zstream.total_out;
1711  inflateEnd(&zstream);
1712  if (result != Z_STREAM_END) {
1713  if (result == Z_MEM_ERROR)
1714  result = AVERROR(ENOMEM);
1715  else
1716  result = AVERROR_INVALIDDATA;
1717  goto failed;
1718  }
1719  break;
1720  }
1721 #endif
1722 #if CONFIG_BZLIB
1724  {
1725  bz_stream bzstream = { 0 };
1726  if (!pkt_size || BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1727  return -1;
1728  bzstream.next_in = data;
1729  bzstream.avail_in = isize;
1730  do {
1731  pkt_size *= 3;
1732  newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1733  if (!newpktdata) {
1734  BZ2_bzDecompressEnd(&bzstream);
1735  result = AVERROR(ENOMEM);
1736  goto failed;
1737  }
1738  pkt_data = newpktdata;
1739  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1740  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1741  result = BZ2_bzDecompress(&bzstream);
1742  } while (result == BZ_OK && pkt_size < 10000000);
1743  pkt_size = bzstream.total_out_lo32;
1744  BZ2_bzDecompressEnd(&bzstream);
1745  if (result != BZ_STREAM_END) {
1746  if (result == BZ_MEM_ERROR)
1747  result = AVERROR(ENOMEM);
1748  else
1749  result = AVERROR_INVALIDDATA;
1750  goto failed;
1751  }
1752  break;
1753  }
1754 #endif
1755  default:
1756  return AVERROR_INVALIDDATA;
1757  }
1758 
1759  memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1760 
1761  *buf = pkt_data;
1762  *buf_size = pkt_size;
1763  return 0;
1765 failed:
1766  av_free(pkt_data);
1767  return result;
1768 }
1769 
1770 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1771  AVDictionary **metadata, char *prefix)
1772 {
1773  MatroskaTag *tags = list->elem;
1774  char key[1024];
1775  int i;
1776 
1777  for (i = 0; i < list->nb_elem; i++) {
1778  const char *lang = tags[i].lang &&
1779  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1780 
1781  if (!tags[i].name) {
1782  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1783  continue;
1784  }
1785  if (prefix)
1786  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1787  else
1788  av_strlcpy(key, tags[i].name, sizeof(key));
1789  if (tags[i].def || !lang) {
1790  av_dict_set(metadata, key, tags[i].string, 0);
1791  if (tags[i].sub.nb_elem)
1792  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1793  }
1794  if (lang) {
1795  av_strlcat(key, "-", sizeof(key));
1796  av_strlcat(key, lang, sizeof(key));
1797  av_dict_set(metadata, key, tags[i].string, 0);
1798  if (tags[i].sub.nb_elem)
1799  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1800  }
1801  }
1803 }
1804 
1806 {
1807  MatroskaDemuxContext *matroska = s->priv_data;
1808  MatroskaTags *tags = matroska->tags.elem;
1809  int i, j;
1810 
1811  for (i = 0; i < matroska->tags.nb_elem; i++) {
1812  if (tags[i].target.attachuid) {
1813  MatroskaAttachment *attachment = matroska->attachments.elem;
1814  int found = 0;
1815  for (j = 0; j < matroska->attachments.nb_elem; j++) {
1816  if (attachment[j].uid == tags[i].target.attachuid &&
1817  attachment[j].stream) {
1818  matroska_convert_tag(s, &tags[i].tag,
1819  &attachment[j].stream->metadata, NULL);
1820  found = 1;
1821  }
1822  }
1823  if (!found) {
1825  "The tags at index %d refer to a "
1826  "non-existent attachment %"PRId64".\n",
1827  i, tags[i].target.attachuid);
1828  }
1829  } else if (tags[i].target.chapteruid) {
1830  MatroskaChapter *chapter = matroska->chapters.elem;
1831  int found = 0;
1832  for (j = 0; j < matroska->chapters.nb_elem; j++) {
1833  if (chapter[j].uid == tags[i].target.chapteruid &&
1834  chapter[j].chapter) {
1835  matroska_convert_tag(s, &tags[i].tag,
1836  &chapter[j].chapter->metadata, NULL);
1837  found = 1;
1838  }
1839  }
1840  if (!found) {
1842  "The tags at index %d refer to a non-existent chapter "
1843  "%"PRId64".\n",
1844  i, tags[i].target.chapteruid);
1845  }
1846  } else if (tags[i].target.trackuid) {
1847  MatroskaTrack *track = matroska->tracks.elem;
1848  int found = 0;
1849  for (j = 0; j < matroska->tracks.nb_elem; j++) {
1850  if (track[j].uid == tags[i].target.trackuid &&
1851  track[j].stream) {
1852  matroska_convert_tag(s, &tags[i].tag,
1853  &track[j].stream->metadata, NULL);
1854  found = 1;
1855  }
1856  }
1857  if (!found) {
1859  "The tags at index %d refer to a non-existent track "
1860  "%"PRId64".\n",
1861  i, tags[i].target.trackuid);
1862  }
1863  } else {
1864  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1865  tags[i].target.type);
1866  }
1867  }
1868 }
1869 
1871  int64_t pos)
1872 {
1873  uint32_t saved_id = matroska->current_id;
1874  int64_t before_pos = avio_tell(matroska->ctx->pb);
1875  int ret = 0;
1876  int ret2;
1877 
1878  /* seek */
1879  if (avio_seek(matroska->ctx->pb, pos, SEEK_SET) == pos) {
1880  /* We don't want to lose our seekhead level, so we add
1881  * a dummy. This is a crude hack. */
1882  if (matroska->num_levels == EBML_MAX_DEPTH) {
1883  av_log(matroska->ctx, AV_LOG_INFO,
1884  "Max EBML element depth (%d) reached, "
1885  "cannot parse further.\n", EBML_MAX_DEPTH);
1886  ret = AVERROR_INVALIDDATA;
1887  } else {
1888  matroska->levels[matroska->num_levels] = (MatroskaLevel) { 0, EBML_UNKNOWN_LENGTH };
1889  matroska->num_levels++;
1890  matroska->current_id = 0;
1891 
1892  ret = ebml_parse(matroska, matroska_segment, matroska);
1893  if (ret == LEVEL_ENDED) {
1894  /* This can only happen if the seek brought us beyond EOF. */
1895  ret = AVERROR_EOF;
1896  }
1897  }
1898  }
1899  /* Seek back - notice that in all instances where this is used
1900  * it is safe to set the level to 1. */
1901  ret2 = matroska_reset_status(matroska, saved_id, before_pos);
1902  if (ret >= 0)
1903  ret = ret2;
1904 
1905  return ret;
1906 }
1907 
1908 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1909 {
1910  EbmlList *seekhead_list = &matroska->seekhead;
1911  int i;
1912 
1913  // we should not do any seeking in the streaming case
1914  if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1915  return;
1916 
1917  for (i = 0; i < seekhead_list->nb_elem; i++) {
1918  MatroskaSeekhead *seekheads = seekhead_list->elem;
1919  uint32_t id = seekheads[i].id;
1920  int64_t pos = seekheads[i].pos + matroska->segment_start;
1921  MatroskaLevel1Element *elem;
1922 
1923  if (id != seekheads[i].id || pos < matroska->segment_start)
1924  continue;
1925 
1926  elem = matroska_find_level1_elem(matroska, id, pos);
1927  if (!elem || elem->parsed)
1928  continue;
1929 
1930  elem->pos = pos;
1931 
1932  // defer cues parsing until we actually need cue data.
1933  if (id == MATROSKA_ID_CUES)
1934  continue;
1935 
1936  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1937  // mark index as broken
1938  matroska->cues_parsing_deferred = -1;
1939  break;
1940  }
1941 
1942  elem->parsed = 1;
1943  }
1944 }
1945 
1946 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1947 {
1948  EbmlList *index_list;
1950  uint64_t index_scale = 1;
1951  int i, j;
1952 
1953  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1954  return;
1955 
1956  index_list = &matroska->index;
1957  index = index_list->elem;
1958  if (index_list->nb_elem < 2)
1959  return;
1960  if (index[1].time > 1E14 / matroska->time_scale) {
1961  av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1962  return;
1963  }
1964  for (i = 0; i < index_list->nb_elem; i++) {
1965  EbmlList *pos_list = &index[i].pos;
1966  MatroskaIndexPos *pos = pos_list->elem;
1967  for (j = 0; j < pos_list->nb_elem; j++) {
1968  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1969  pos[j].track);
1970  if (track && track->stream)
1971  av_add_index_entry(track->stream,
1972  pos[j].pos + matroska->segment_start,
1973  index[i].time / index_scale, 0, 0,
1975  }
1976  }
1977 }
1978 
1979 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1980  int i;
1981 
1982  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1983  return;
1984 
1985  for (i = 0; i < matroska->num_level1_elems; i++) {
1986  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1987  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1988  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1989  matroska->cues_parsing_deferred = -1;
1990  elem->parsed = 1;
1991  break;
1992  }
1993  }
1994 
1995  matroska_add_index_entries(matroska);
1996 }
1997 
1998 static int matroska_aac_profile(char *codec_id)
1999 {
2000  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
2001  int profile;
2002 
2004  if (strstr(codec_id, aac_profiles[profile]))
2005  break;
2006  return profile + 1;
2007 }
2008 
2009 static int matroska_aac_sri(int samplerate)
2010 {
2011  int sri;
2012 
2013  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
2014  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
2015  break;
2016  return sri;
2017 }
2018 
2019 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
2020 {
2021  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
2022  avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
2023 }
2024 
2026  MatroskaTrack *track,
2027  int *offset)
2028 {
2029  AVStream *st = track->stream;
2030  uint8_t *p = track->codec_priv.data;
2031  int size = track->codec_priv.size;
2032 
2033  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
2034  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
2035  track->codec_priv.size = 0;
2036  return 0;
2037  }
2038  *offset = 8;
2039  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
2040 
2041  p += track->codec_priv.size;
2042  size -= track->codec_priv.size;
2043 
2044  /* parse the remaining metadata blocks if present */
2045  while (size >= 4) {
2046  int block_last, block_type, block_size;
2047 
2048  flac_parse_block_header(p, &block_last, &block_type, &block_size);
2049 
2050  p += 4;
2051  size -= 4;
2052  if (block_size > size)
2053  return 0;
2054 
2055  /* check for the channel mask */
2056  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
2057  AVDictionary *dict = NULL;
2058  AVDictionaryEntry *chmask;
2059 
2060  ff_vorbis_comment(s, &dict, p, block_size, 0);
2061  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
2062  if (chmask) {
2063  uint64_t mask = strtol(chmask->value, NULL, 0);
2064  if (!mask || mask & ~0x3ffffULL) {
2066  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
2067  } else
2068  st->codecpar->channel_layout = mask;
2069  }
2070  av_dict_free(&dict);
2071  }
2072 
2073  p += block_size;
2074  size -= block_size;
2075  }
2076 
2077  return 0;
2078 }
2079 
2080 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
2081 {
2082  int minor, micro, bttb = 0;
2083 
2084  /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
2085  * this function, and fixed in 57.52 */
2086  if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf57.%d.%d", &minor, &micro) == 2)
2087  bttb = (minor >= 36 && minor <= 51 && micro >= 100);
2088 
2089  switch (field_order) {
2091  return AV_FIELD_PROGRESSIVE;
2093  return AV_FIELD_UNKNOWN;
2095  return AV_FIELD_TT;
2097  return AV_FIELD_BB;
2099  return bttb ? AV_FIELD_TB : AV_FIELD_BT;
2101  return bttb ? AV_FIELD_BT : AV_FIELD_TB;
2102  default:
2103  return AV_FIELD_UNKNOWN;
2104  }
2105 }
2106 
2107 static void mkv_stereo_mode_display_mul(int stereo_mode,
2108  int *h_width, int *h_height)
2109 {
2110  switch (stereo_mode) {
2116  break;
2121  *h_width = 2;
2122  break;
2127  *h_height = 2;
2128  break;
2129  }
2130 }
2131 
2132 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
2133  const MatroskaTrackVideoColor *color = track->video.color.elem;
2134  const MatroskaMasteringMeta *mastering_meta;
2135  int has_mastering_primaries, has_mastering_luminance;
2136 
2137  if (!track->video.color.nb_elem)
2138  return 0;
2139 
2140  mastering_meta = &color->mastering_meta;
2141  // Mastering primaries are CIE 1931 coords, and must be > 0.
2142  has_mastering_primaries =
2143  mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
2144  mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
2145  mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
2146  mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
2147  has_mastering_luminance = mastering_meta->max_luminance >
2148  mastering_meta->min_luminance.el.f &&
2149  mastering_meta->min_luminance.el.f >= 0 &&
2150  mastering_meta->min_luminance.count;
2151 
2152  if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
2153  st->codecpar->color_space = color->matrix_coefficients;
2154  if (color->primaries != AVCOL_PRI_RESERVED &&
2155  color->primaries != AVCOL_PRI_RESERVED0)
2156  st->codecpar->color_primaries = color->primaries;
2157  if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
2158  color->transfer_characteristics != AVCOL_TRC_RESERVED0)
2159  st->codecpar->color_trc = color->transfer_characteristics;
2160  if (color->range != AVCOL_RANGE_UNSPECIFIED &&
2161  color->range <= AVCOL_RANGE_JPEG)
2162  st->codecpar->color_range = color->range;
2163  if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
2164  color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
2165  color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
2166  color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
2167  st->codecpar->chroma_location =
2168  avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
2169  (color->chroma_siting_vert - 1) << 7);
2170  }
2171  if (color->max_cll && color->max_fall) {
2172  size_t size = 0;
2173  int ret;
2175  if (!metadata)
2176  return AVERROR(ENOMEM);
2178  (uint8_t *)metadata, size);
2179  if (ret < 0) {
2180  av_freep(&metadata);
2181  return ret;
2182  }
2183  metadata->MaxCLL = color->max_cll;
2184  metadata->MaxFALL = color->max_fall;
2185  }
2186 
2187  if (has_mastering_primaries || has_mastering_luminance) {
2188  AVMasteringDisplayMetadata *metadata =
2191  sizeof(AVMasteringDisplayMetadata));
2192  if (!metadata) {
2193  return AVERROR(ENOMEM);
2194  }
2195  memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
2196  if (has_mastering_primaries) {
2197  metadata->display_primaries[0][0] = av_d2q(mastering_meta->r_x, INT_MAX);
2198  metadata->display_primaries[0][1] = av_d2q(mastering_meta->r_y, INT_MAX);
2199  metadata->display_primaries[1][0] = av_d2q(mastering_meta->g_x, INT_MAX);
2200  metadata->display_primaries[1][1] = av_d2q(mastering_meta->g_y, INT_MAX);
2201  metadata->display_primaries[2][0] = av_d2q(mastering_meta->b_x, INT_MAX);
2202  metadata->display_primaries[2][1] = av_d2q(mastering_meta->b_y, INT_MAX);
2203  metadata->white_point[0] = av_d2q(mastering_meta->white_x, INT_MAX);
2204  metadata->white_point[1] = av_d2q(mastering_meta->white_y, INT_MAX);
2205  metadata->has_primaries = 1;
2206  }
2207  if (has_mastering_luminance) {
2208  metadata->max_luminance = av_d2q(mastering_meta->max_luminance, INT_MAX);
2209  metadata->min_luminance = av_d2q(mastering_meta->min_luminance.el.f, INT_MAX);
2210  metadata->has_luminance = 1;
2211  }
2212  }
2213  return 0;
2214 }
2215 
2216 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track,
2217  void *logctx)
2218 {
2219  AVSphericalMapping *spherical;
2220  const MatroskaTrackVideoProjection *mkv_projection = &track->video.projection;
2221  const uint8_t *priv_data = mkv_projection->private.data;
2222  enum AVSphericalProjection projection;
2223  size_t spherical_size;
2224  uint32_t l = 0, t = 0, r = 0, b = 0;
2225  uint32_t padding = 0;
2226  int ret;
2227 
2228  if (mkv_projection->private.size && priv_data[0] != 0) {
2229  av_log(logctx, AV_LOG_WARNING, "Unknown spherical metadata\n");
2230  return 0;
2231  }
2232 
2233  switch (track->video.projection.type) {
2235  if (track->video.projection.private.size == 20) {
2236  t = AV_RB32(priv_data + 4);
2237  b = AV_RB32(priv_data + 8);
2238  l = AV_RB32(priv_data + 12);
2239  r = AV_RB32(priv_data + 16);
2240 
2241  if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2242  av_log(logctx, AV_LOG_ERROR,
2243  "Invalid bounding rectangle coordinates "
2244  "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2245  l, t, r, b);
2246  return AVERROR_INVALIDDATA;
2247  }
2248  } else if (track->video.projection.private.size != 0) {
2249  av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2250  return AVERROR_INVALIDDATA;
2251  }
2252 
2253  if (l || t || r || b)
2254  projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2255  else
2256  projection = AV_SPHERICAL_EQUIRECTANGULAR;
2257  break;
2259  if (track->video.projection.private.size < 4) {
2260  av_log(logctx, AV_LOG_ERROR, "Missing projection private properties\n");
2261  return AVERROR_INVALIDDATA;
2262  } else if (track->video.projection.private.size == 12) {
2263  uint32_t layout = AV_RB32(priv_data + 4);
2264  if (layout) {
2265  av_log(logctx, AV_LOG_WARNING,
2266  "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2267  return 0;
2268  }
2269  projection = AV_SPHERICAL_CUBEMAP;
2270  padding = AV_RB32(priv_data + 8);
2271  } else {
2272  av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2273  return AVERROR_INVALIDDATA;
2274  }
2275  break;
2277  /* No Spherical metadata */
2278  return 0;
2279  default:
2280  av_log(logctx, AV_LOG_WARNING,
2281  "Unknown spherical metadata type %"PRIu64"\n",
2282  track->video.projection.type);
2283  return 0;
2284  }
2285 
2286  spherical = av_spherical_alloc(&spherical_size);
2287  if (!spherical)
2288  return AVERROR(ENOMEM);
2289 
2290  spherical->projection = projection;
2291 
2292  spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2293  spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2294  spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2295 
2296  spherical->padding = padding;
2297 
2298  spherical->bound_left = l;
2299  spherical->bound_top = t;
2300  spherical->bound_right = r;
2301  spherical->bound_bottom = b;
2302 
2303  ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2304  spherical_size);
2305  if (ret < 0) {
2306  av_freep(&spherical);
2307  return ret;
2308  }
2309 
2310  return 0;
2311 }
2312 
2313 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2314 {
2315  const AVCodecTag *codec_tags;
2316 
2317  codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2319 
2320  /* Normalize noncompliant private data that starts with the fourcc
2321  * by expanding/shifting the data by 4 bytes and storing the data
2322  * size at the start. */
2323  if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2324  int ret = av_buffer_realloc(&track->codec_priv.buf,
2326  if (ret < 0)
2327  return ret;
2328 
2329  track->codec_priv.data = track->codec_priv.buf->data;
2330  memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2331  track->codec_priv.size += 4;
2332  AV_WB32(track->codec_priv.data, track->codec_priv.size);
2333  }
2334 
2335  *fourcc = AV_RL32(track->codec_priv.data + 4);
2336  *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2337 
2338  return 0;
2339 }
2340 
2342 {
2343  MatroskaDemuxContext *matroska = s->priv_data;
2344  MatroskaTrack *tracks = matroska->tracks.elem;
2345  AVStream *st;
2346  int i, j, ret;
2347  int k;
2348 
2349  for (i = 0; i < matroska->tracks.nb_elem; i++) {
2350  MatroskaTrack *track = &tracks[i];
2352  EbmlList *encodings_list = &track->encodings;
2353  MatroskaTrackEncoding *encodings = encodings_list->elem;
2354  uint8_t *extradata = NULL;
2355  int extradata_size = 0;
2356  int extradata_offset = 0;
2357  uint32_t fourcc = 0;
2358  AVIOContext b;
2359  char* key_id_base64 = NULL;
2360  int bit_depth = -1;
2361 
2362  /* Apply some sanity checks. */
2363  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2364  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2365  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2366  track->type != MATROSKA_TRACK_TYPE_METADATA) {
2367  av_log(matroska->ctx, AV_LOG_INFO,
2368  "Unknown or unsupported track type %"PRIu64"\n",
2369  track->type);
2370  continue;
2371  }
2372  if (!track->codec_id)
2373  continue;
2374 
2375  if ( track->type == MATROSKA_TRACK_TYPE_AUDIO && track->codec_id[0] != 'A'
2376  || track->type == MATROSKA_TRACK_TYPE_VIDEO && track->codec_id[0] != 'V'
2377  || track->type == MATROSKA_TRACK_TYPE_SUBTITLE && track->codec_id[0] != 'D' && track->codec_id[0] != 'S'
2378  || track->type == MATROSKA_TRACK_TYPE_METADATA && track->codec_id[0] != 'D' && track->codec_id[0] != 'S'
2379  ) {
2380  av_log(matroska->ctx, AV_LOG_INFO, "Inconsistent track type\n");
2381  continue;
2382  }
2383 
2384  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2385  isnan(track->audio.samplerate)) {
2386  av_log(matroska->ctx, AV_LOG_WARNING,
2387  "Invalid sample rate %f, defaulting to 8000 instead.\n",
2388  track->audio.samplerate);
2389  track->audio.samplerate = 8000;
2390  }
2391 
2392  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2393  if (!track->default_duration && track->video.frame_rate > 0) {
2394  double default_duration = 1000000000 / track->video.frame_rate;
2395  if (default_duration > UINT64_MAX || default_duration < 0) {
2396  av_log(matroska->ctx, AV_LOG_WARNING,
2397  "Invalid frame rate %e. Cannot calculate default duration.\n",
2398  track->video.frame_rate);
2399  } else {
2400  track->default_duration = default_duration;
2401  }
2402  }
2403  if (track->video.display_width == -1)
2404  track->video.display_width = track->video.pixel_width;
2405  if (track->video.display_height == -1)
2406  track->video.display_height = track->video.pixel_height;
2407  if (track->video.color_space.size == 4)
2408  fourcc = AV_RL32(track->video.color_space.data);
2409  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2410  if (!track->audio.out_samplerate)
2411  track->audio.out_samplerate = track->audio.samplerate;
2412  }
2413  if (encodings_list->nb_elem > 1) {
2414  av_log(matroska->ctx, AV_LOG_ERROR,
2415  "Multiple combined encodings not supported");
2416  } else if (encodings_list->nb_elem == 1) {
2417  if (encodings[0].type) {
2418  if (encodings[0].encryption.key_id.size > 0) {
2419  /* Save the encryption key id to be stored later as a
2420  metadata tag. */
2421  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2422  key_id_base64 = av_malloc(b64_size);
2423  if (key_id_base64 == NULL)
2424  return AVERROR(ENOMEM);
2425 
2426  av_base64_encode(key_id_base64, b64_size,
2427  encodings[0].encryption.key_id.data,
2428  encodings[0].encryption.key_id.size);
2429  } else {
2430  encodings[0].scope = 0;
2431  av_log(matroska->ctx, AV_LOG_ERROR,
2432  "Unsupported encoding type");
2433  }
2434  } else if (
2435 #if CONFIG_ZLIB
2436  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2437 #endif
2438 #if CONFIG_BZLIB
2439  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2440 #endif
2441 #if CONFIG_LZO
2442  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2443 #endif
2444  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2445  encodings[0].scope = 0;
2446  av_log(matroska->ctx, AV_LOG_ERROR,
2447  "Unsupported encoding type");
2448  } else if (track->codec_priv.size && encodings[0].scope & 2) {
2449  uint8_t *codec_priv = track->codec_priv.data;
2450  int ret = matroska_decode_buffer(&track->codec_priv.data,
2451  &track->codec_priv.size,
2452  track);
2453  if (ret < 0) {
2454  track->codec_priv.data = NULL;
2455  track->codec_priv.size = 0;
2456  av_log(matroska->ctx, AV_LOG_ERROR,
2457  "Failed to decode codec private data\n");
2458  }
2459 
2460  if (codec_priv != track->codec_priv.data) {
2461  av_buffer_unref(&track->codec_priv.buf);
2462  if (track->codec_priv.data) {
2463  track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2465  NULL, NULL, 0);
2466  if (!track->codec_priv.buf) {
2467  av_freep(&track->codec_priv.data);
2468  track->codec_priv.size = 0;
2469  return AVERROR(ENOMEM);
2470  }
2471  }
2472  }
2473  }
2474  }
2475  track->needs_decoding = encodings && !encodings[0].type &&
2476  encodings[0].scope & 1 &&
2477  (encodings[0].compression.algo !=
2479  encodings[0].compression.settings.size);
2480 
2481  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2482  if (av_strstart(track->codec_id, ff_mkv_codec_tags[j].str, NULL)) {
2484  break;
2485  }
2486  }
2487 
2488  st = track->stream = avformat_new_stream(s, NULL);
2489  if (!st) {
2490  av_free(key_id_base64);
2491  return AVERROR(ENOMEM);
2492  }
2493 
2494  if (key_id_base64) {
2495  /* export encryption key id as base64 metadata tag */
2496  av_dict_set(&st->metadata, "enc_key_id", key_id_base64,
2498  }
2499 
2500  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2501  track->codec_priv.size >= 40 &&
2502  track->codec_priv.data) {
2503  track->ms_compat = 1;
2504  bit_depth = AV_RL16(track->codec_priv.data + 14);
2505  fourcc = AV_RL32(track->codec_priv.data + 16);
2507  fourcc);
2508  if (!codec_id)
2510  fourcc);
2511  extradata_offset = 40;
2512  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2513  track->codec_priv.size >= 14 &&
2514  track->codec_priv.data) {
2515  int ret;
2517  track->codec_priv.size,
2518  0, NULL, NULL, NULL, NULL);
2519  ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2520  if (ret < 0)
2521  return ret;
2522  codec_id = st->codecpar->codec_id;
2523  fourcc = st->codecpar->codec_tag;
2524  extradata_offset = FFMIN(track->codec_priv.size, 18);
2525  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2526  /* Normally 36, but allow noncompliant private data */
2527  && (track->codec_priv.size >= 32)
2528  && (track->codec_priv.data)) {
2529  uint16_t sample_size;
2530  int ret = get_qt_codec(track, &fourcc, &codec_id);
2531  if (ret < 0)
2532  return ret;
2533  sample_size = AV_RB16(track->codec_priv.data + 26);
2534  if (fourcc == 0) {
2535  if (sample_size == 8) {
2536  fourcc = MKTAG('r','a','w',' ');
2538  } else if (sample_size == 16) {
2539  fourcc = MKTAG('t','w','o','s');
2541  }
2542  }
2543  if ((fourcc == MKTAG('t','w','o','s') ||
2544  fourcc == MKTAG('s','o','w','t')) &&
2545  sample_size == 8)
2547  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2548  (track->codec_priv.size >= 21) &&
2549  (track->codec_priv.data)) {
2550  int ret = get_qt_codec(track, &fourcc, &codec_id);
2551  if (ret < 0)
2552  return ret;
2553  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2554  fourcc = MKTAG('S','V','Q','3');
2556  }
2557  if (codec_id == AV_CODEC_ID_NONE)
2558  av_log(matroska->ctx, AV_LOG_ERROR,
2559  "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2560  if (track->codec_priv.size >= 86) {
2561  bit_depth = AV_RB16(track->codec_priv.data + 82);
2563  track->codec_priv.size,
2564  0, NULL, NULL, NULL, NULL);
2565  if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2566  bit_depth &= 0x1F;
2567  track->has_palette = 1;
2568  }
2569  }
2570  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2571  switch (track->audio.bitdepth) {
2572  case 8:
2574  break;
2575  case 24:
2577  break;
2578  case 32:
2580  break;
2581  }
2582  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2583  switch (track->audio.bitdepth) {
2584  case 8:
2586  break;
2587  case 24:
2589  break;
2590  case 32:
2592  break;
2593  }
2594  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2595  track->audio.bitdepth == 64) {
2597  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2598  int profile = matroska_aac_profile(track->codec_id);
2599  int sri = matroska_aac_sri(track->audio.samplerate);
2600  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2601  if (!extradata)
2602  return AVERROR(ENOMEM);
2603  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2604  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2605  if (strstr(track->codec_id, "SBR")) {
2606  sri = matroska_aac_sri(track->audio.out_samplerate);
2607  extradata[2] = 0x56;
2608  extradata[3] = 0xE5;
2609  extradata[4] = 0x80 | (sri << 3);
2610  extradata_size = 5;
2611  } else
2612  extradata_size = 2;
2613  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2614  /* Only ALAC's magic cookie is stored in Matroska's track headers.
2615  * Create the "atom size", "tag", and "tag version" fields the
2616  * decoder expects manually. */
2617  extradata_size = 12 + track->codec_priv.size;
2618  extradata = av_mallocz(extradata_size +
2620  if (!extradata)
2621  return AVERROR(ENOMEM);
2622  AV_WB32(extradata, extradata_size);
2623  memcpy(&extradata[4], "alac", 4);
2624  AV_WB32(&extradata[8], 0);
2625  memcpy(&extradata[12], track->codec_priv.data,
2626  track->codec_priv.size);
2627  } else if (codec_id == AV_CODEC_ID_TTA) {
2628  uint8_t *ptr;
2629  if (track->audio.channels > UINT16_MAX ||
2630  track->audio.bitdepth > UINT16_MAX) {
2631  av_log(matroska->ctx, AV_LOG_WARNING,
2632  "Too large audio channel number %"PRIu64
2633  " or bitdepth %"PRIu64". Skipping track.\n",
2634  track->audio.channels, track->audio.bitdepth);
2635  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2636  return AVERROR_INVALIDDATA;
2637  else
2638  continue;
2639  }
2640  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2641  return AVERROR_INVALIDDATA;
2642  extradata_size = 22;
2643  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2644  if (!extradata)
2645  return AVERROR(ENOMEM);
2646  ptr = extradata;
2647  bytestream_put_be32(&ptr, AV_RB32("TTA1"));
2648  bytestream_put_le16(&ptr, 1);
2649  bytestream_put_le16(&ptr, track->audio.channels);
2650  bytestream_put_le16(&ptr, track->audio.bitdepth);
2651  bytestream_put_le32(&ptr, track->audio.out_samplerate);
2652  bytestream_put_le32(&ptr, av_rescale(matroska->duration * matroska->time_scale,
2653  track->audio.out_samplerate,
2654  AV_TIME_BASE * 1000));
2655  } else if (codec_id == AV_CODEC_ID_RV10 ||
2659  extradata_offset = 26;
2660  } else if (codec_id == AV_CODEC_ID_RA_144) {
2661  track->audio.out_samplerate = 8000;
2662  track->audio.channels = 1;
2663  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2667  && track->codec_priv.data) {
2668  int flavor;
2669 
2671  track->codec_priv.size,
2672  0, NULL, NULL, NULL, NULL);
2673  avio_skip(&b, 22);
2674  flavor = avio_rb16(&b);
2675  track->audio.coded_framesize = avio_rb32(&b);
2676  avio_skip(&b, 12);
2677  track->audio.sub_packet_h = avio_rb16(&b);
2678  track->audio.frame_size = avio_rb16(&b);
2679  track->audio.sub_packet_size = avio_rb16(&b);
2680  if (track->audio.coded_framesize <= 0 ||
2681  track->audio.sub_packet_h <= 0 ||
2682  track->audio.frame_size <= 0)
2683  return AVERROR_INVALIDDATA;
2684 
2685  if (codec_id == AV_CODEC_ID_RA_288) {
2686  if (track->audio.sub_packet_h & 1 || 2 * track->audio.frame_size
2687  != (int64_t)track->audio.sub_packet_h * track->audio.coded_framesize)
2688  return AVERROR_INVALIDDATA;
2689  st->codecpar->block_align = track->audio.coded_framesize;
2690  track->codec_priv.size = 0;
2691  } else {
2692  if (codec_id == AV_CODEC_ID_SIPR) {
2693  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2694  if (flavor > 3)
2695  return AVERROR_INVALIDDATA;
2696  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2697  st->codecpar->bit_rate = sipr_bit_rate[flavor];
2698  } else if (track->audio.sub_packet_size <= 0 ||
2699  track->audio.frame_size % track->audio.sub_packet_size)
2700  return AVERROR_INVALIDDATA;
2701  st->codecpar->block_align = track->audio.sub_packet_size;
2702  extradata_offset = 78;
2703  }
2704  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2705  track->audio.frame_size);
2706  if (!track->audio.buf)
2707  return AVERROR(ENOMEM);
2708  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2709  ret = matroska_parse_flac(s, track, &extradata_offset);
2710  if (ret < 0)
2711  return ret;
2712  } else if (codec_id == AV_CODEC_ID_WAVPACK && track->codec_priv.size < 2) {
2713  av_log(matroska->ctx, AV_LOG_INFO, "Assuming WavPack version 4.10 "
2714  "in absence of valid CodecPrivate.\n");
2715  extradata_size = 2;
2716  extradata = av_mallocz(2 + AV_INPUT_BUFFER_PADDING_SIZE);
2717  if (!extradata)
2718  return AVERROR(ENOMEM);
2719  AV_WL16(extradata, 0x410);
2720  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2721  fourcc = AV_RL32(track->codec_priv.data);
2722  } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2723  /* we don't need any value stored in CodecPrivate.
2724  make sure that it's not exported as extradata. */
2725  track->codec_priv.size = 0;
2726  } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2727  /* For now, propagate only the OBUs, if any. Once libavcodec is
2728  updated to handle isobmff style extradata this can be removed. */
2729  extradata_offset = 4;
2730  }
2731  track->codec_priv.size -= extradata_offset;
2732 
2733  if (codec_id == AV_CODEC_ID_NONE)
2734  av_log(matroska->ctx, AV_LOG_INFO,
2735  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2736 
2737  if (track->time_scale < 0.01) {
2738  av_log(matroska->ctx, AV_LOG_WARNING,
2739  "Track TimestampScale too small %f, assuming 1.0.\n",
2740  track->time_scale);
2741  track->time_scale = 1.0;
2742  }
2743  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2744  1000 * 1000 * 1000); /* 64 bit pts in ns */
2745 
2746  /* convert the delay from ns to the track timebase */
2748  (AVRational){ 1, 1000000000 },
2749  st->time_base);
2750 
2751  st->codecpar->codec_id = codec_id;
2752 
2753  if (strcmp(track->language, "und"))
2754  av_dict_set(&st->metadata, "language", track->language, 0);
2755  av_dict_set(&st->metadata, "title", track->name, 0);
2756 
2757  if (track->flag_default)
2759  if (track->flag_forced)
2761  if (track->flag_comment)
2763  if (track->flag_hearingimpaired)
2765  if (track->flag_visualimpaired)
2767  if (track->flag_original.count > 0)
2770 
2771  if (!st->codecpar->extradata) {
2772  if (extradata) {
2773  st->codecpar->extradata = extradata;
2774  st->codecpar->extradata_size = extradata_size;
2775  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2776  if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2777  return AVERROR(ENOMEM);
2778  memcpy(st->codecpar->extradata,
2779  track->codec_priv.data + extradata_offset,
2780  track->codec_priv.size);
2781  }
2782  }
2783 
2784  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2786  int display_width_mul = 1;
2787  int display_height_mul = 1;
2788 
2790  st->codecpar->codec_tag = fourcc;
2791  if (bit_depth >= 0)
2793  st->codecpar->width = track->video.pixel_width;
2794  st->codecpar->height = track->video.pixel_height;
2795 
2797  st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2800 
2802  mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2803 
2805  if (track->video.display_width && track->video.display_height &&
2806  st->codecpar->height < INT64_MAX / track->video.display_width / display_width_mul &&
2807  st->codecpar->width < INT64_MAX / track->video.display_height / display_height_mul)
2809  &st->sample_aspect_ratio.den,
2810  st->codecpar->height * track->video.display_width * display_width_mul,
2811  st->codecpar->width * track->video.display_height * display_height_mul,
2812  INT_MAX);
2813  }
2814  if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2816 
2817  if (track->default_duration) {
2818  int div = track->default_duration <= INT64_MAX ? 1 : 2;
2820  1000000000 / div, track->default_duration / div, 30000);
2821 #if FF_API_R_FRAME_RATE
2822  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2823  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2824  st->r_frame_rate = st->avg_frame_rate;
2825 #endif
2826  }
2827 
2828  /* export stereo mode flag as metadata tag */
2830  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2831 
2832  /* export alpha mode flag as metadata tag */
2833  if (track->video.alpha_mode)
2834  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2835 
2836  /* if we have virtual track, mark the real tracks */
2837  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2838  char buf[32];
2840  continue;
2841  snprintf(buf, sizeof(buf), "%s_%d",
2843  for (k=0; k < matroska->tracks.nb_elem; k++)
2844  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2845  av_dict_set(&tracks[k].stream->metadata,
2846  "stereo_mode", buf, 0);
2847  break;
2848  }
2849  }
2850  // add stream level stereo3d side data if it is a supported format
2852  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2853  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2854  if (ret < 0)
2855  return ret;
2856  }
2857 
2858  ret = mkv_parse_video_color(st, track);
2859  if (ret < 0)
2860  return ret;
2861  ret = mkv_parse_video_projection(st, track, matroska->ctx);
2862  if (ret < 0)
2863  return ret;
2864  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2866  st->codecpar->codec_tag = fourcc;
2867  st->codecpar->sample_rate = track->audio.out_samplerate;
2868  st->codecpar->channels = track->audio.channels;
2869  if (!st->codecpar->bits_per_coded_sample)
2871  if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2872  st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2875  else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2877  if (track->codec_delay > 0) {
2879  (AVRational){1, 1000000000},
2880  (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2881  48000 : st->codecpar->sample_rate});
2882  }
2883  if (track->seek_preroll > 0) {
2885  (AVRational){1, 1000000000},
2886  (AVRational){1, st->codecpar->sample_rate});
2887  }
2888  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2890 
2891  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2893  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2895  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2897  }
2898  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2900 
2901  if (track->flag_textdescriptions)
2903  }
2904  }
2905 
2906  return 0;
2907 }
2908 
2910 {
2911  MatroskaDemuxContext *matroska = s->priv_data;
2912  EbmlList *attachments_list = &matroska->attachments;
2913  EbmlList *chapters_list = &matroska->chapters;
2914  MatroskaAttachment *attachments;
2915  MatroskaChapter *chapters;
2916  uint64_t max_start = 0;
2917  int64_t pos;
2918  Ebml ebml = { 0 };
2919  int i, j, res;
2920 
2921  matroska->ctx = s;
2922  matroska->cues_parsing_deferred = 1;
2923 
2924  /* First read the EBML header. */
2925  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2926  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2927  ebml_free(ebml_syntax, &ebml);
2928  return AVERROR_INVALIDDATA;
2929  }
2930  if (ebml.version > EBML_VERSION ||
2931  ebml.max_size > sizeof(uint64_t) ||
2932  ebml.id_length > sizeof(uint32_t) ||
2933  ebml.doctype_version > 3) {
2935  "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2936  ebml.version, ebml.doctype, ebml.doctype_version);
2937  ebml_free(ebml_syntax, &ebml);
2938  return AVERROR_PATCHWELCOME;
2939  } else if (ebml.doctype_version == 3) {
2940  av_log(matroska->ctx, AV_LOG_WARNING,
2941  "EBML header using unsupported features\n"
2942  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2943  ebml.version, ebml.doctype, ebml.doctype_version);
2944  }
2945  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2946  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2947  break;
2949  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2950  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2951  ebml_free(ebml_syntax, &ebml);
2952  return AVERROR_INVALIDDATA;
2953  }
2954  }
2955  ebml_free(ebml_syntax, &ebml);
2956 
2957  matroska->pkt = av_packet_alloc();
2958  if (!matroska->pkt)
2959  return AVERROR(ENOMEM);
2960 
2961  /* The next thing is a segment. */
2962  pos = avio_tell(matroska->ctx->pb);
2963  res = ebml_parse(matroska, matroska_segments, matroska);
2964  // Try resyncing until we find an EBML_STOP type element.
2965  while (res != 1) {
2966  res = matroska_resync(matroska, pos);
2967  if (res < 0)
2968  goto fail;
2969  pos = avio_tell(matroska->ctx->pb);
2970  res = ebml_parse(matroska, matroska_segment, matroska);
2971  if (res == AVERROR(EIO)) // EOF is translated to EIO, this exists the loop on EOF
2972  goto fail;
2973  }
2974  /* Set data_offset as it might be needed later by seek_frame_generic. */
2975  if (matroska->current_id == MATROSKA_ID_CLUSTER)
2976  s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2977  matroska_execute_seekhead(matroska);
2978 
2979  if (!matroska->time_scale)
2980  matroska->time_scale = 1000000;
2981  if (isnan(matroska->duration))
2982  matroska->duration = 0;
2983  if (matroska->duration)
2984  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2985  1000 / AV_TIME_BASE;
2986  av_dict_set(&s->metadata, "title", matroska->title, 0);
2987  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2988 
2989  if (matroska->date_utc.size == 8)
2990  matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2991 
2992  res = matroska_parse_tracks(s);
2993  if (res < 0)
2994  goto fail;
2995 
2996  attachments = attachments_list->elem;
2997  for (j = 0; j < attachments_list->nb_elem; j++) {
2998  if (!(attachments[j].filename && attachments[j].mime &&
2999  attachments[j].bin.data && attachments[j].bin.size > 0)) {
3000  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
3001  } else {
3003  if (!st)
3004  break;
3005  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
3006  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
3007  if (attachments[j].description)
3008  av_dict_set(&st->metadata, "title", attachments[j].description, 0);
3010 
3011  for (i = 0; mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
3012  if (av_strstart(attachments[j].mime, mkv_image_mime_tags[i].str, NULL)) {
3014  break;
3015  }
3016  }
3017 
3018  attachments[j].stream = st;
3019 
3020  if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
3021  AVPacket *pkt = &st->attached_pic;
3022 
3025 
3027  pkt->buf = attachments[j].bin.buf;
3028  attachments[j].bin.buf = NULL;
3029  pkt->data = attachments[j].bin.data;
3030  pkt->size = attachments[j].bin.size;
3031  pkt->stream_index = st->index;
3033  } else {
3035  if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
3036  break;
3037  memcpy(st->codecpar->extradata, attachments[j].bin.data,
3038  attachments[j].bin.size);
3039 
3040  for (i = 0; mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
3041  if (av_strstart(attachments[j].mime, mkv_mime_tags[i].str, NULL)) {
3043  break;
3044  }
3045  }
3046  }
3047  }
3048  }
3049 
3050  chapters = chapters_list->elem;
3051  for (i = 0; i < chapters_list->nb_elem; i++)
3052  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
3053  (max_start == 0 || chapters[i].start > max_start)) {
3054  chapters[i].chapter =
3055  avpriv_new_chapter(s, chapters[i].uid,
3056  (AVRational) { 1, 1000000000 },
3057  chapters[i].start, chapters[i].end,
3058  chapters[i].title);
3059  max_start = chapters[i].start;
3060  }
3061 
3062  matroska_add_index_entries(matroska);
3063 
3065 
3066  return 0;
3067 fail:
3069  return res;
3071 
3072 /*
3073  * Put one packet in an application-supplied AVPacket struct.
3074  * Returns 0 on success or -1 on failure.
3075  */
3076 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
3077  AVPacket *pkt)
3078 {
3079  if (matroska->queue) {
3080  MatroskaTrack *tracks = matroska->tracks.elem;
3081  MatroskaTrack *track;
3082 
3083  avpriv_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
3084  track = &tracks[pkt->stream_index];
3085  if (track->has_palette) {
3087  if (!pal) {
3088  av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
3089  } else {
3090  memcpy(pal, track->palette, AVPALETTE_SIZE);
3091  }
3092  track->has_palette = 0;
3093  }
3094  return 0;
3095  }
3096 
3097  return -1;
3098 }
3099 
3100 /*
3101  * Free all packets in our internal queue.
3102  */
3103 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
3104 {
3105  avpriv_packet_list_free(&matroska->queue, &matroska->queue_end);
3106 }
3107 
3108 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
3109  int size, int type, AVIOContext *pb,
3110  uint32_t lace_size[256], int *laces)
3111 {
3112  int n;
3113  uint8_t *data = *buf;
3114 
3115  if (!type) {
3116  *laces = 1;
3117  lace_size[0] = size;
3118  return 0;
3119  }
3120 
3121  if (size <= 0)
3122  return AVERROR_INVALIDDATA;
3123 
3124  *laces = *data + 1;
3125  data += 1;
3126  size -= 1;
3127 
3128  switch (type) {
3129  case 0x1: /* Xiph lacing */
3130  {
3131  uint8_t temp;
3132  uint32_t total = 0;
3133  for (n = 0; n < *laces - 1; n++) {
3134  lace_size[n] = 0;
3135 
3136  do {
3137  if (size <= total)
3138  return AVERROR_INVALIDDATA;
3139  temp = *data;
3140  total += temp;
3141  lace_size[n] += temp;
3142  data += 1;
3143  size -= 1;
3144  } while (temp == 0xff);
3145  }
3146  if (size < total)
3147  return AVERROR_INVALIDDATA;
3148 
3149  lace_size[n] = size - total;
3150  break;
3151  }
3152 
3153  case 0x2: /* fixed-size lacing */
3154  if (size % (*laces))
3155  return AVERROR_INVALIDDATA;
3156  for (n = 0; n < *laces; n++)
3157  lace_size[n] = size / *laces;
3158  break;
3159 
3160  case 0x3: /* EBML lacing */
3161  {
3162  uint64_t num;
3163  uint64_t total;
3164  int offset;
3165 
3166  avio_skip(pb, 4);
3167 
3168  n = ebml_read_num(matroska, pb, 8, &num, 1);
3169  if (n < 0)
3170  return n;
3171  if (num > INT_MAX)
3172  return AVERROR_INVALIDDATA;
3173 
3174  total = lace_size[0] = num;
3175  offset = n;
3176  for (n = 1; n < *laces - 1; n++) {
3177  int64_t snum;
3178  int r;
3179  r = matroska_ebmlnum_sint(matroska, pb, &snum);
3180  if (r < 0)
3181  return r;
3182  if (lace_size[n - 1] + snum > (uint64_t)INT_MAX)
3183  return AVERROR_INVALIDDATA;
3184 
3185  lace_size[n] = lace_size[n - 1] + snum;
3186  total += lace_size[n];
3187  offset += r;
3188  }
3189  data += offset;
3190  size -= offset;
3191  if (size < total)
3192  return AVERROR_INVALIDDATA;
3193 
3194  lace_size[*laces - 1] = size - total;
3195  break;
3196  }
3197  }
3199  *buf = data;
3200 
3201  return 0;
3202 }
3203 
3204 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
3205  MatroskaTrack *track, AVStream *st,
3206  uint8_t *data, int size, uint64_t timecode,
3207  int64_t pos)
3208 {
3209  const int a = st->codecpar->block_align;
3210  const int sps = track->audio.sub_packet_size;
3211  const int cfs = track->audio.coded_framesize;
3212  const int h = track->audio.sub_packet_h;
3213  const int w = track->audio.frame_size;
3214  int y = track->audio.sub_packet_cnt;
3215  int x;
3216 
3217  if (!track->audio.pkt_cnt) {
3218  if (track->audio.sub_packet_cnt == 0)
3219  track->audio.buf_timecode = timecode;
3220  if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
3221  if (size < cfs * h / 2) {
3222  av_log(matroska->ctx, AV_LOG_ERROR,
3223  "Corrupt int4 RM-style audio packet size\n");
3224  return AVERROR_INVALIDDATA;
3225  }
3226  for (x = 0; x < h / 2; x++)
3227  memcpy(track->audio.buf + x * 2 * w + y * cfs,
3228  data + x * cfs, cfs);
3229  } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3230  if (size < w) {
3231  av_log(matroska->ctx, AV_LOG_ERROR,
3232  "Corrupt sipr RM-style audio packet size\n");
3233  return AVERROR_INVALIDDATA;
3234  }
3235  memcpy(track->audio.buf + y * w, data, w);
3236  } else {
3237  if (size < w) {
3238  av_log(matroska->ctx, AV_LOG_ERROR,
3239  "Corrupt generic RM-style audio packet size\n");
3240  return AVERROR_INVALIDDATA;
3241  }
3242  for (x = 0; x < w / sps; x++)
3243  memcpy(track->audio.buf +
3244  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3245  data + x * sps, sps);
3246  }
3247 
3248  if (++track->audio.sub_packet_cnt >= h) {
3249  if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3250  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3251  track->audio.sub_packet_cnt = 0;
3252  track->audio.pkt_cnt = h * w / a;
3253  }
3254  }
3255 
3256  while (track->audio.pkt_cnt) {
3257  int ret;
3258  AVPacket *pkt = matroska->pkt;
3259 
3260  ret = av_new_packet(pkt, a);
3261  if (ret < 0) {
3262  return ret;
3263  }
3264  memcpy(pkt->data,
3265  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3266  a);
3267  pkt->pts = track->audio.buf_timecode;
3269  pkt->pos = pos;
3270  pkt->stream_index = st->index;
3271  ret = avpriv_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, NULL, 0);
3272  if (ret < 0) {
3274  return AVERROR(ENOMEM);
3275  }
3276  }
3277 
3278  return 0;
3279 }
3280 
3281 /* reconstruct full wavpack blocks from mangled matroska ones */
3282 static int matroska_parse_wavpack(MatroskaTrack *track,
3283  uint8_t **data, int *size)
3284 {
3285  uint8_t *dst = NULL;
3286  uint8_t *src = *data;
3287  int dstlen = 0;
3288  int srclen = *size;
3289  uint32_t samples;
3290  uint16_t ver;
3291  int ret, offset = 0;
3292 
3293  if (srclen < 12)
3294  return AVERROR_INVALIDDATA;
3295 
3296  av_assert1(track->stream->codecpar->extradata_size >= 2);
3297  ver = AV_RL16(track->stream->codecpar->extradata);
3298 
3299  samples = AV_RL32(src);
3300  src += 4;
3301  srclen -= 4;
3302 
3303  while (srclen >= 8) {
3304  int multiblock;
3305  uint32_t blocksize;
3306  uint8_t *tmp;
3307 
3308  uint32_t flags = AV_RL32(src);
3309  uint32_t crc = AV_RL32(src + 4);
3310  src += 8;
3311  srclen -= 8;
3312 
3313  multiblock = (flags & 0x1800) != 0x1800;
3314  if (multiblock) {
3315  if (srclen < 4) {
3316  ret = AVERROR_INVALIDDATA;
3317  goto fail;
3318  }
3319  blocksize = AV_RL32(src);
3320  src += 4;
3321  srclen -= 4;
3322  } else
3323  blocksize = srclen;
3324 
3325  if (blocksize > srclen) {
3326  ret = AVERROR_INVALIDDATA;
3327  goto fail;
3328  }
3329 
3330  tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3331  if (!tmp) {
3332  ret = AVERROR(ENOMEM);
3333  goto fail;
3334  }
3335  dst = tmp;
3336  dstlen += blocksize + 32;
3337 
3338  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3339  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3340  AV_WL16(dst + offset + 8, ver); // version
3341  AV_WL16(dst + offset + 10, 0); // track/index_no
3342  AV_WL32(dst + offset + 12, 0); // total samples
3343  AV_WL32(dst + offset + 16, 0); // block index
3344  AV_WL32(dst + offset + 20, samples); // number of samples
3345  AV_WL32(dst + offset + 24, flags); // flags
3346  AV_WL32(dst + offset + 28, crc); // crc
3347  memcpy(dst + offset + 32, src, blocksize); // block data
3348 
3349  src += blocksize;
3350  srclen -= blocksize;
3351  offset += blocksize + 32;
3352  }
3353 
3354  memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3355 
3356  *data = dst;
3357  *size = dstlen;
3358 
3359  return 0;
3361 fail:
3362  av_freep(&dst);
3363  return ret;
3364 }
3365 
3366 static int matroska_parse_prores(MatroskaTrack *track,
3367  uint8_t **data, int *size)
3368 {
3369  uint8_t *dst;
3370  int dstlen = *size + 8;
3371 
3372  dst = av_malloc(dstlen + AV_INPUT_BUFFER_PADDING_SIZE);
3373  if (!dst)
3374  return AVERROR(ENOMEM);
3375 
3376  AV_WB32(dst, dstlen);
3377  AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3378  memcpy(dst + 8, *data, dstlen - 8);
3379  memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3380 
3381  *data = dst;
3382  *size = dstlen;
3383 
3384  return 0;
3385 }
3386 
3387 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3388  MatroskaTrack *track,
3389  AVStream *st,
3390  uint8_t *data, int data_len,
3391  uint64_t timecode,
3392  uint64_t duration,
3393  int64_t pos)
3394 {
3395  AVPacket *pkt = matroska->pkt;
3396  uint8_t *id, *settings, *text, *buf;
3397  int id_len, settings_len, text_len;
3398  uint8_t *p, *q;
3399  int err;
3400 
3401  if (data_len <= 0)
3402  return AVERROR_INVALIDDATA;
3403 
3404  p = data;
3405  q = data + data_len;
3406 
3407  id = p;
3408  id_len = -1;
3409  while (p < q) {
3410  if (*p == '\r' || *p == '\n') {
3411  id_len = p - id;
3412  if (*p == '\r')
3413  p++;
3414  break;
3415  }
3416  p++;
3417  }
3418 
3419  if (p >= q || *p != '\n')
3420  return AVERROR_INVALIDDATA;
3421  p++;
3422 
3423  settings = p;
3424  settings_len = -1;
3425  while (p < q) {
3426  if (*p == '\r' || *p == '\n') {
3427  settings_len = p - settings;
3428  if (*p == '\r')
3429  p++;
3430  break;
3431  }
3432  p++;
3433  }
3434 
3435  if (p >= q || *p != '\n')
3436  return AVERROR_INVALIDDATA;
3437  p++;
3438 
3439  text = p;
3440  text_len = q - p;
3441  while (text_len > 0) {
3442  const int len = text_len - 1;
3443  const uint8_t c = p[len];
3444  if (c != '\r' && c != '\n')
3445  break;
3446  text_len = len;
3447  }
3448 
3449  if (text_len <= 0)
3450  return AVERROR_INVALIDDATA;
3451 
3452  err = av_new_packet(pkt, text_len);
3453  if (err < 0) {
3454  return err;
3455  }
3456 
3457  memcpy(pkt->data, text, text_len);
3458 
3459  if (id_len > 0) {
3462  id_len);
3463  if (!buf) {
3465  return AVERROR(ENOMEM);
3466  }
3467  memcpy(buf, id, id_len);
3468  }
3469 
3470  if (settings_len > 0) {
3473  settings_len);
3474  if (!buf) {
3476  return AVERROR(ENOMEM);
3477  }
3478  memcpy(buf, settings, settings_len);
3479  }
3480 
3481  // Do we need this for subtitles?
3482  // pkt->flags = AV_PKT_FLAG_KEY;
3483 
3484  pkt->stream_index = st->index;
3485  pkt->pts = timecode;
3486 
3487  // Do we need this for subtitles?
3488  // pkt->dts = timecode;
3489 
3490  pkt->duration = duration;
3491  pkt->pos = pos;
3492 
3493  err = avpriv_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, NULL, 0);
3494  if (err < 0) {
3496  return AVERROR(ENOMEM);
3497  }
3498 
3499  return 0;
3500 }
3501 
3502 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3503  MatroskaTrack *track, AVStream *st,
3504  AVBufferRef *buf, uint8_t *data, int pkt_size,
3505  uint64_t timecode, uint64_t lace_duration,
3506  int64_t pos, int is_keyframe,
3507  uint8_t *additional, uint64_t additional_id, int additional_size,
3508  int64_t discard_padding)
3509 {
3510  uint8_t *pkt_data = data;
3511  int res = 0;
3512  AVPacket *pkt = matroska->pkt;
3513 
3514  if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3515  res = matroska_parse_wavpack(track, &pkt_data, &pkt_size);
3516  if (res < 0) {
3517  av_log(matroska->ctx, AV_LOG_ERROR,
3518  "Error parsing a wavpack block.\n");
3519  goto fail;
3520  }
3521  if (!buf)
3522  av_freep(&data);
3523  buf = NULL;
3524  }
3525 
3526  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3527  AV_RB32(pkt_data + 4) != MKBETAG('i', 'c', 'p', 'f')) {
3528  res = matroska_parse_prores(track, &pkt_data, &pkt_size);
3529  if (res < 0) {
3530  av_log(matroska->ctx, AV_LOG_ERROR,
3531  "Error parsing a prores block.\n");
3532  goto fail;
3533  }
3534  if (!buf)
3535  av_freep(&data);
3536  buf = NULL;
3537  }
3538 
3539  if (!pkt_size && !additional_size)
3540  goto no_output;
3541 
3543  if (!buf)
3544  pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3545  NULL, NULL, 0);
3546  else
3547  pkt->buf = av_buffer_ref(buf);
3548 
3549  if (!pkt->buf) {
3550  res = AVERROR(ENOMEM);
3551  goto fail;
3552  }
3553 
3554  pkt->data = pkt_data;
3555  pkt->size = pkt_size;
3556  pkt->flags = is_keyframe;
3557  pkt->stream_index = st->index;
3558 
3559  if (additional_size > 0) {
3560  uint8_t *side_data = av_packet_new_side_data(pkt,
3562  additional_size + 8);
3563  if (!side_data) {
3565  return AVERROR(ENOMEM);
3566  }
3567  AV_WB64(side_data, additional_id);
3568  memcpy(side_data + 8, additional, additional_size);
3569  }
3570 
3571  if (discard_padding) {
3572  uint8_t *side_data = av_packet_new_side_data(pkt,
3574  10);
3575  if (!side_data) {
3577  return AVERROR(ENOMEM);
3578  }
3579  discard_padding = av_rescale_q(discard_padding,
3580  (AVRational){1, 1000000000},
3581  (AVRational){1, st->codecpar->sample_rate});
3582  if (discard_padding > 0) {
3583  AV_WL32(side_data + 4, discard_padding);
3584  } else {
3585  AV_WL32(side_data, -discard_padding);
3586  }
3587  }
3588 
3589  if (track->ms_compat)
3590  pkt->dts = timecode;
3591  else
3592  pkt->pts = timecode;
3593  pkt->pos = pos;
3594  pkt->duration = lace_duration;
3595 
3596 #if FF_API_CONVERGENCE_DURATION
3598  if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3599  pkt->convergence_duration = lace_duration;
3600  }
3602 #endif
3603 
3604  res = avpriv_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, NULL, 0);
3605  if (res < 0) {
3607  return AVERROR(ENOMEM);
3608  }
3609 
3610  return 0;
3611 
3612 no_output:
3614  if (!buf)
3615  av_free(pkt_data);
3616  return res;
3617 }
3618 
3620  int size, int64_t pos, uint64_t cluster_time,
3621  uint64_t block_duration, int is_keyframe,
3622  uint8_t *additional, uint64_t additional_id, int additional_size,
3623  int64_t cluster_pos, int64_t discard_padding)
3624 {
3625  uint64_t timecode = AV_NOPTS_VALUE;
3626  MatroskaTrack *track;
3627  AVIOContext pb;
3628  int res = 0;
3629  AVStream *st;
3630  int16_t block_time;
3631  uint32_t lace_size[256];
3632  int n, flags, laces = 0;
3633  uint64_t num;
3634  int trust_default_duration;
3635 
3636  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
3637 
3638  if ((n = ebml_read_num(matroska, &pb, 8, &num, 1)) < 0)
3639  return n;
3640  data += n;
3641  size -= n;
3642 
3643  track = matroska_find_track_by_num(matroska, num);
3644  if (!track || size < 3)
3645  return AVERROR_INVALIDDATA;
3646 
3647  if (!(st = track->stream)) {
3648  av_log(matroska->ctx, AV_LOG_VERBOSE,
3649  "No stream associated to TrackNumber %"PRIu64". "
3650  "Ignoring Block with this TrackNumber.\n", num);
3651  return 0;
3652  }
3653 
3654  if (st->discard >= AVDISCARD_ALL)
3655  return res;
3656  if (block_duration > INT64_MAX)
3657  block_duration = INT64_MAX;
3658 
3659  block_time = sign_extend(AV_RB16(data), 16);
3660  data += 2;
3661  flags = *data++;
3662  size -= 3;
3663  if (is_keyframe == -1)
3664  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3665 
3666  if (cluster_time != (uint64_t) -1 &&
3667  (block_time >= 0 || cluster_time >= -block_time)) {
3668  uint64_t timecode_cluster_in_track_tb = (double) cluster_time / track->time_scale;
3669  timecode = timecode_cluster_in_track_tb + block_time - track->codec_delay_in_track_tb;
3670  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3671  timecode < track->end_timecode)
3672  is_keyframe = 0; /* overlapping subtitles are not key frame */
3673  if (is_keyframe) {
3674  ff_reduce_index(matroska->ctx, st->index);
3675  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3677  }
3678  }
3679 
3680  if (matroska->skip_to_keyframe &&
3681  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3682  // Compare signed timecodes. Timecode may be negative due to codec delay
3683  // offset. We don't support timestamps greater than int64_t anyway - see
3684  // AVPacket's pts.
3685  if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3686  return res;
3687  if (is_keyframe)
3688  matroska->skip_to_keyframe = 0;
3689  else if (!st->internal->skip_to_keyframe) {
3690  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3691  matroska->skip_to_keyframe = 0;
3692  }
3693  }
3694 
3695  res = matroska_parse_laces(matroska, &data, size, (flags & 0x06) >> 1,
3696  &pb, lace_size, &laces);
3697  if (res < 0) {
3698  av_log(matroska->ctx, AV_LOG_ERROR, "Error parsing frame sizes.\n");
3699  return res;
3700  }
3701 
3702  trust_default_duration = track->default_duration != 0;
3703  if (track->audio.samplerate == 8000 && trust_default_duration) {
3704  // If this is needed for more codecs, then add them here
3705  if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3706  if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3707  trust_default_duration = 0;
3708  }
3709  }
3710 
3711  if (!block_duration && trust_default_duration)
3712  block_duration = track->default_duration * laces / matroska->time_scale;
3713 
3714  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3715  track->end_timecode =
3716  FFMAX(track->end_timecode, timecode + block_duration);
3717 
3718  for (n = 0; n < laces; n++) {
3719  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3720  uint8_t *out_data = data;
3721  int out_size = lace_size[n];
3722 
3723  if (track->needs_decoding) {
3724  res = matroska_decode_buffer(&out_data, &out_size, track);
3725  if (res < 0)
3726  return res;
3727  /* Given that we are here means that out_data is no longer
3728  * owned by buf, so set it to NULL. This depends upon
3729  * zero-length header removal compression being ignored. */
3730  av_assert1(out_data != data);
3731  buf = NULL;
3732  }
3733 
3734  if (track->audio.buf) {
3735  res = matroska_parse_rm_audio(matroska, track, st,
3736  out_data, out_size,
3737  timecode, pos);
3738  if (!buf)
3739  av_free(out_data);
3740  if (res)
3741  return res;
3742  } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3743  res = matroska_parse_webvtt(matroska, track, st,
3744  out_data, out_size,
3745  timecode, lace_duration,
3746  pos);
3747  if (!buf)
3748  av_free(out_data);
3749  if (res)
3750  return res;
3751  } else {
3752  res = matroska_parse_frame(matroska, track, st, buf, out_data,
3753  out_size, timecode, lace_duration,
3754  pos, !n ? is_keyframe : 0,
3755  additional, additional_id, additional_size,
3756  discard_padding);
3757  if (res)
3758  return res;
3759  }
3760 
3761  if (timecode != AV_NOPTS_VALUE)
3762  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3763  data += lace_size[n];
3764  }
3765 
3766  return 0;
3767 }
3768 
3769 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3770 {
3771  MatroskaCluster *cluster = &matroska->current_cluster;
3772  MatroskaBlock *block = &cluster->block;
3773  int res;
3774 
3775  av_assert0(matroska->num_levels <= 2);
3776 
3777  if (matroska->num_levels == 1) {
3778  res = ebml_parse(matroska, matroska_segment, NULL);
3779 
3780  if (res == 1) {
3781  /* Found a cluster: subtract the size of the ID already read. */
3782  cluster->pos = avio_tell(matroska->ctx->pb) - 4;
3783 
3784  res = ebml_parse(matroska, matroska_cluster_enter, cluster);
3785  if (res < 0)
3786  return res;
3787  }
3788  }
3789 
3790  if (matroska->num_levels == 2) {
3791  /* We are inside a cluster. */
3792  res = ebml_parse(matroska, matroska_cluster_parsing, cluster);
3793 
3794  if (res >= 0 && block->bin.size > 0) {
3795  int is_keyframe = block->non_simple ? block->reference.count == 0 : -1;
3796  uint8_t* additional = block->additional.size > 0 ?
3797  block->additional.data : NULL;
3798 
3799  res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3800  block->bin.size, block->bin.pos,
3801  cluster->timecode, block->duration,
3802  is_keyframe, additional, block->additional_id,
3803  block->additional.size, cluster->pos,
3804  block->discard_padding);
3805  }
3806 
3808  memset(block, 0, sizeof(*block));
3809  } else if (!matroska->num_levels) {
3810  if (!avio_feof(matroska->ctx->pb)) {
3811  avio_r8(matroska->ctx->pb);
3812  if (!avio_feof(matroska->ctx->pb)) {
3813  av_log(matroska->ctx, AV_LOG_WARNING, "File extends beyond "
3814  "end of segment.\n");
3815  return AVERROR_INVALIDDATA;
3816  }
3817  }
3818  matroska->done = 1;
3819  return AVERROR_EOF;
3820  }
3821 
3822  return res;
3823 }
3824 
3826 {
3827  MatroskaDemuxContext *matroska = s->priv_data;
3828  int ret = 0;
3829 
3830  if (matroska->resync_pos == -1) {
3831  // This can only happen if generic seeking has been used.
3832  matroska->resync_pos = avio_tell(s->pb);
3833  }
3834 
3835  while (matroska_deliver_packet(matroska, pkt)) {
3836  if (matroska->done)
3837  return (ret < 0) ? ret : AVERROR_EOF;
3838  if (matroska_parse_cluster(matroska) < 0 && !matroska->done)
3839  ret = matroska_resync(matroska, matroska->resync_pos);
3840  }
3841 
3842  return 0;
3843 }
3844 
3845 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3846  int64_t timestamp, int flags)
3847 {
3848  MatroskaDemuxContext *matroska = s->priv_data;
3849  MatroskaTrack *tracks = NULL;
3850  AVStream *st = s->streams[stream_index];
3851  int i, index;
3852 
3853  /* Parse the CUES now since we need the index data to seek. */
3854  if (matroska->cues_parsing_deferred > 0) {
3855  matroska->cues_parsing_deferred = 0;
3856  matroska_parse_cues(matroska);
3857  }
3858 
3859  if (!st->nb_index_entries)
3860  goto err;
3861  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3862 
3863  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3864  matroska_reset_status(matroska, 0, st->index_entries[st->nb_index_entries - 1].pos);
3865  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3866  matroska_clear_queue(matroska);
3867  if (matroska_parse_cluster(matroska) < 0)
3868  break;
3869  }
3870  }
3871 
3872  matroska_clear_queue(matroska);
3873  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3874  goto err;
3875 
3876  tracks = matroska->tracks.elem;
3877  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3878  tracks[i].audio.pkt_cnt = 0;
3879  tracks[i].audio.sub_packet_cnt = 0;
3880  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3881  tracks[i].end_timecode = 0;
3882  }
3883 
3884  /* We seek to a level 1 element, so set the appropriate status. */
3885  matroska_reset_status(matroska, 0, st->index_entries[index].pos);
3886  if (flags & AVSEEK_FLAG_ANY) {
3887  st->internal->skip_to_keyframe = 0;
3888  matroska->skip_to_timecode = timestamp;
3889  } else {
3890  st->internal->skip_to_keyframe = 1;
3891  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3892  }
3893  matroska->skip_to_keyframe = 1;
3894  matroska->done = 0;
3896  return 0;
3897 err:
3898  // slightly hackish but allows proper fallback to
3899  // the generic seeking code.
3900  matroska_reset_status(matroska, 0, -1);
3901  matroska->resync_pos = -1;
3902  matroska_clear_queue(matroska);
3904  matroska->skip_to_keyframe = 0;
3905  matroska->done = 0;
3906  return -1;
3907 }
3908 
3910 {
3911  MatroskaDemuxContext *matroska = s->priv_data;
3912  MatroskaTrack *tracks = matroska->tracks.elem;
3913  int n;
3914 
3915  matroska_clear_queue(matroska);
3916  av_packet_free(&matroska->pkt);
3917 
3918  for (n = 0; n < matroska->tracks.nb_elem; n++)
3919  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3920  av_freep(&tracks[n].audio.buf);
3923  return 0;
3925 
3926 typedef struct {
3927  int64_t start_time_ns;
3928  int64_t end_time_ns;
3929  int64_t start_offset;
3930  int64_t end_offset;
3932 
3933 /* This function searches all the Cues and returns the CueDesc corresponding to
3934  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3935  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3936  */
3937 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3938  MatroskaDemuxContext *matroska = s->priv_data;
3939  CueDesc cue_desc;
3940  int i;
3941  int nb_index_entries = s->streams[0]->nb_index_entries;
3942  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3943 
3944  if (ts >= (int64_t)(matroska->duration * matroska->time_scale))
3945  return (CueDesc) {-1, -1, -1, -1};
3946  for (i = 1; i < nb_index_entries; i++) {
3947  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3948  index_entries[i].timestamp * matroska->time_scale > ts) {
3949  break;
3950  }
3951  }
3952  --i;
3953  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3954  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3955  if (i != nb_index_entries - 1) {
3956  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3957  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3958  } else {
3959  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3960  // FIXME: this needs special handling for files where Cues appear
3961  // before Clusters. the current logic assumes Cues appear after
3962  // Clusters.
3963  cue_desc.end_offset = cues_start - matroska->segment_start;
3964  }
3965  return cue_desc;
3966 }
3967 
3969 {
3970  MatroskaDemuxContext *matroska = s->priv_data;
3971  uint32_t id = matroska->current_id;
3972  int64_t cluster_pos, before_pos;
3973  int index, rv = 1;
3974  if (s->streams[0]->nb_index_entries <= 0) return 0;
3975  // seek to the first cluster using cues.
3976  index = av_index_search_timestamp(s->streams[0], 0, 0);
3977  if (index < 0) return 0;
3978  cluster_pos = s->streams[0]->index_entries[index].pos;
3979  before_pos = avio_tell(s->pb);
3980  while (1) {
3981  uint64_t cluster_id, cluster_length;
3982  int read;
3983  AVPacket *pkt;
3984  avio_seek(s->pb, cluster_pos, SEEK_SET);
3985  // read cluster id and length
3986  read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3987  if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3988  break;
3989  read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3990  if (read < 0)
3991  break;
3992 
3993  matroska_reset_status(matroska, 0, cluster_pos);
3994  matroska_clear_queue(matroska);
3995  if (matroska_parse_cluster(matroska) < 0 ||
3996  !matroska->queue) {
3997  break;
3998  }
3999  pkt = &matroska->queue->pkt;
4000  // 4 + read is the length of the cluster id and the cluster length field.
4001  cluster_pos += 4 + read + cluster_length;
4002  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
4003  rv = 0;
4004  break;
4005  }
4006  }
4007 
4008  /* Restore the status after matroska_read_header: */
4009  matroska_reset_status(matroska, id, before_pos);
4010 
4011  return rv;
4012 }
4013 
4014 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
4015  double min_buffer, double* buffer,
4016  double* sec_to_download, AVFormatContext *s,
4017  int64_t cues_start)
4018 {
4019  double nano_seconds_per_second = 1000000000.0;
4020  double time_sec = time_ns / nano_seconds_per_second;
4021  int rv = 0;
4022  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
4023  int64_t end_time_ns = time_ns + time_to_search_ns;
4024  double sec_downloaded = 0.0;
4025  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
4026  if (desc_curr.start_time_ns == -1)
4027  return -1;
4028  *sec_to_download = 0.0;
4029 
4030  // Check for non cue start time.
4031  if (time_ns > desc_curr.start_time_ns) {
4032  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
4033  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
4034  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
4035  double timeToDownload = (cueBytes * 8.0) / bps;
4036 
4037  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
4038  *sec_to_download += timeToDownload;
4039 
4040  // Check if the search ends within the first cue.
4041  if (desc_curr.end_time_ns >= end_time_ns) {
4042  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4043  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4044  sec_downloaded = percent_to_sub * sec_downloaded;
4045  *sec_to_download = percent_to_sub * *sec_to_download;
4046  }
4047 
4048  if ((sec_downloaded + *buffer) <= min_buffer) {
4049  return 1;
4050  }
4051 
4052  // Get the next Cue.
4053  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4054  }
4055 
4056  while (desc_curr.start_time_ns != -1) {
4057  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
4058  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
4059  double desc_sec = desc_ns / nano_seconds_per_second;
4060  double bits = (desc_bytes * 8.0);
4061  double time_to_download = bits / bps;
4062 
4063  sec_downloaded += desc_sec - time_to_download;
4064  *sec_to_download += time_to_download;
4065 
4066  if (desc_curr.end_time_ns >= end_time_ns) {
4067  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4068  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4069  sec_downloaded = percent_to_sub * sec_downloaded;
4070  *sec_to_download = percent_to_sub * *sec_to_download;
4071 
4072  if ((sec_downloaded + *buffer) <= min_buffer)
4073  rv = 1;
4074  break;
4075  }
4076 
4077  if ((sec_downloaded + *buffer) <= min_buffer) {
4078  rv = 1;
4079  break;
4080  }
4081 
4082  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4083  }
4084  *buffer = *buffer + sec_downloaded;
4085  return rv;
4086 }
4087 
4088 /* This function computes the bandwidth of the WebM file with the help of
4089  * buffer_size_after_time_downloaded() function. Both of these functions are
4090  * adapted from WebM Tools project and are adapted to work with FFmpeg's
4091  * Matroska parsing mechanism.
4092  *
4093  * Returns the bandwidth of the file on success; -1 on error.
4094  * */
4095 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
4096 {
4097  MatroskaDemuxContext *matroska = s->priv_data;
4098  AVStream *st = s->streams[0];
4099  double bandwidth = 0.0;
4100  int i;
4101 
4102  for (i = 0; i < st->nb_index_entries; i++) {
4103  int64_t prebuffer_ns = 1000000000;
4104  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
4105  double nano_seconds_per_second = 1000000000.0;
4106  int64_t prebuffered_ns = time_ns + prebuffer_ns;
4107  double prebuffer_bytes = 0.0;
4108  int64_t temp_prebuffer_ns = prebuffer_ns;
4109  int64_t pre_bytes, pre_ns;
4110  double pre_sec, prebuffer, bits_per_second;
4111  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
4112 
4113  // Start with the first Cue.
4114  CueDesc desc_end = desc_beg;
4115 
4116  // Figure out how much data we have downloaded for the prebuffer. This will
4117  // be used later to adjust the bits per sample to try.
4118  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
4119  // Prebuffered the entire Cue.
4120  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
4121  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
4122  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4123  }
4124  if (desc_end.start_time_ns == -1) {
4125  // The prebuffer is larger than the duration.
4126  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
4127  return -1;
4128  bits_per_second = 0.0;
4129  } else {
4130  // The prebuffer ends in the last Cue. Estimate how much data was
4131  // prebuffered.
4132  pre_bytes = desc_end.end_offset - desc_end.start_offset;
4133  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
4134  if (pre_ns <= 0)
4135  return -1;
4136  pre_sec = pre_ns / nano_seconds_per_second;
4137  prebuffer_bytes +=
4138  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
4139 
4140  prebuffer = prebuffer_ns / nano_seconds_per_second;
4141 
4142  // Set this to 0.0 in case our prebuffer buffers the entire video.
4143  bits_per_second = 0.0;
4144  do {
4145  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
4146  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
4147  double desc_sec, calc_bits_per_second, percent, mod_bits_per_second;
4148  if (desc_bytes <= 0)
4149  return -1;
4150 
4151  desc_sec = desc_ns / nano_seconds_per_second;
4152  calc_bits_per_second = (desc_bytes * 8) / desc_sec;
4153 
4154  // Drop the bps by the percentage of bytes buffered.
4155  percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
4156  mod_bits_per_second = calc_bits_per_second * percent;
4157 
4158  if (prebuffer < desc_sec) {
4159  double search_sec =
4160  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
4161 
4162  // Add 1 so the bits per second should be a little bit greater than file
4163  // datarate.
4164  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
4165  const double min_buffer = 0.0;
4166  double buffer = prebuffer;
4167  double sec_to_download = 0.0;
4168 
4169  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
4170  min_buffer, &buffer, &sec_to_download,
4171  s, cues_start);
4172  if (rv < 0) {
4173  return -1;
4174  } else if (rv == 0) {
4175  bits_per_second = (double)(bps);
4176  break;
4177  }
4178  }
4179 
4180  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4181  } while (desc_end.start_time_ns != -1);
4182  }
4183  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
4184  }
4185  return (int64_t)bandwidth;
4186 }
4187 
4188 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
4189 {
4190  MatroskaDemuxContext *matroska = s->priv_data;
4191  EbmlList *seekhead_list = &matroska->seekhead;
4192  MatroskaSeekhead *seekhead = seekhead_list->elem;
4193  char *buf;
4194  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
4195  int i;
4196  int end = 0;
4197 
4198  // determine cues start and end positions
4199  for (i = 0; i < seekhead_list->nb_elem; i++)
4200  if (seekhead[i].id == MATROSKA_ID_CUES)
4201  break;
4202 
4203  if (i >= seekhead_list->nb_elem) return -1;
4204 
4205  before_pos = avio_tell(matroska->ctx->pb);
4206  cues_start = seekhead[i].pos + matroska->segment_start;
4207  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
4208  // cues_end is computed as cues_start + cues_length + length of the
4209  // Cues element ID (i.e. 4) + EBML length of the Cues element.
4210  // cues_end is inclusive and the above sum is reduced by 1.
4211  uint64_t cues_length, cues_id;
4212  int bytes_read;
4213  bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
4214  if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
4215  return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
4216  bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
4217  if (bytes_read < 0)
4218  return bytes_read;
4219  cues_end = cues_start + 4 + bytes_read + cues_length - 1;
4220  }
4221  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
4222  if (cues_start == -1 || cues_end == -1) return -1;
4223 
4224  // parse the cues
4225  matroska_parse_cues(matroska);
4226 
4227  // cues start
4228  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
4229 
4230  // cues end
4231  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
4232 
4233  // if the file has cues at the start, fix up the init range so that
4234  // it does not include it
4235  if (cues_start <= init_range)
4236  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
4237 
4238  // bandwidth
4239  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
4240  if (bandwidth < 0) return -1;
4241  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
4242 
4243  // check if all clusters start with key frames
4245 
4246  // store cue point timestamps as a comma separated list for checking subsegment alignment in
4247  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
4248  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
4249  if (!buf) return -1;
4250  strcpy(buf, "");
4251  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
4252  int ret = snprintf(buf + end, 20,
4253  "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
4254  i != s->streams[0]->nb_index_entries - 1 ? "," : "");
4255  if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
4256  av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
4257  av_free(buf);
4258  return AVERROR_INVALIDDATA;
4259  }
4260  end += ret;
4261  }
4262  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS,
4264 
4265  return 0;
4266 }
4267 
4269 {
4270  char *buf;
4271  int ret = matroska_read_header(s);
4272  int64_t init_range;
4273  MatroskaTrack *tracks;
4274  MatroskaDemuxContext *matroska = s->priv_data;
4275  if (ret) {
4276  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4277  return -1;
4278  }
4279  if (!matroska->tracks.nb_elem || !s->nb_streams) {
4280  av_log(s, AV_LOG_ERROR, "No track found\n");
4281  ret = AVERROR_INVALIDDATA;
4282  goto fail;
4283  }
4284 
4285  if (!matroska->is_live) {
4286  buf = av_asprintf("%g", matroska->duration);
4287  if (!buf) {
4288  ret = AVERROR(ENOMEM);
4289  goto fail;
4290  }
4291  av_dict_set(&s->streams[0]->metadata, DURATION,
4293 
4294  // initialization range
4295  // 5 is the offset of Cluster ID.
4296  init_range = avio_tell(s->pb) - 5;
4297  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4298  }
4299 
4300  // basename of the file
4301  buf = strrchr(s->url, '/');
4302  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4303 
4304  // track number
4305  tracks = matroska->tracks.elem;
4306  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4307 
4308  // parse the cues and populate Cue related fields
4309  if (!matroska->is_live) {
4310  ret = webm_dash_manifest_cues(s, init_range);
4311  if (ret < 0) {
4312  av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4313  goto fail;
4314  }
4315  }
4316 
4317  // use the bandwidth from the command line if it was provided
4318  if (matroska->bandwidth > 0) {
4319  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4320  matroska->bandwidth, 0);
4321  }
4322  return 0;
4323 fail:
4325  return ret;
4326 }
4329 {
4330  return AVERROR_EOF;
4331 }
4332 
4333 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4334 static const AVOption options[] = {
4335  { "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 },
4336  { "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 },
4337  { NULL },
4338 };
4339 
4340 static const AVClass webm_dash_class = {
4341  .class_name = "WebM DASH Manifest demuxer",
4342  .item_name = av_default_item_name,
4343  .option = options,
4344  .version = LIBAVUTIL_VERSION_INT,
4345 };
4346 
4348  .name = "matroska,webm",
4349  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4350  .extensions = "mkv,mk3d,mka,mks,webm",
4351  .priv_data_size = sizeof(MatroskaDemuxContext),
4357  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4358 };
4359 
4361  .name = "webm_dash_manifest",
4362  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4363  .priv_data_size = sizeof(MatroskaDemuxContext),
4367  .priv_class = &webm_dash_class,
4368 };
static void bit_depth(AudioStatsContext *s, uint64_t mask, uint64_t imask, AVRational *depth)
Definition: af_astats.c:254
channels
Definition: aptx.h:33
#define av_unused
Definition: attributes.h:131
uint8_t
int32_t
static const AVProfile aac_profiles[]
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1656
Main libavformat public API header.
#define AVINDEX_KEYFRAME
Definition: avformat.h:811
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1365
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:831
#define AV_DISPOSITION_COMMENT
Definition: avformat.h:821
#define AV_DISPOSITION_CAPTIONS
To specify text track kind (different from subtitles default).
Definition: avformat.h:853
#define AV_DISPOSITION_DUB
Definition: avformat.h:819
#define AV_DISPOSITION_METADATA
Definition: avformat.h:855
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:451
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2417
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:830
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:832
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:841
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:854
#define AV_DISPOSITION_ORIGINAL
Definition: avformat.h:820
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:818
@ AVSTREAM_PARSE_HEADERS
Only parse headers, do not repack.
Definition: avformat.h:795
@ AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:794
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:902
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:766
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:781
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:624
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:88
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:244
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
void avpriv_packet_list_free(PacketList **pkt_buf, PacketList **pkt_buf_end)
Wipe the list and unref all the packets in it.
Definition: avpacket.c:806
int avpriv_packet_list_get(PacketList **pkt_buffer, PacketList **pkt_buffer_end, AVPacket *pkt)
Remove the oldest AVPacket in the list and return it.
Definition: avpacket.c:790
int avpriv_packet_list_put(PacketList **packet_buffer, PacketList **plast_pktl, AVPacket *pkt, int(*copy)(AVPacket *dst, const AVPacket *src), int flags)
Append an AVPacket to the list.
Definition: avpacket.c:753
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, buffer_size_t size)
Definition: avpacket.c:343
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_RB32
Definition: intreadwrite.h:130
#define AV_RB16
Definition: intreadwrite.h:53
#define AV_RL32
Definition: intreadwrite.h:146
#define AV_RB64
Definition: intreadwrite.h:164
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
#define flags(name, subs,...)
Definition: cbs_av1.c:561
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
#define s(width, name)
Definition: cbs_vp9.c:257
uint64_t layout
#define fail()
Definition: checkasm.h:133
@ AV_FIELD_TT
Definition: codec_par.h:39
@ AV_FIELD_BB
Definition: codec_par.h:40
@ AV_FIELD_UNKNOWN
Definition: codec_par.h:37
@ AV_FIELD_PROGRESSIVE
Definition: codec_par.h:38
@ AV_FIELD_BT
Definition: codec_par.h:42
@ AV_FIELD_TB
Definition: codec_par.h:41
#define FFMIN(a, b)
Definition: common.h:105
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define MKBETAG(a, b, c, d)
Definition: common.h:479
#define FFMAX(a, b)
Definition: common.h:103
#define CONFIG_ZLIB
Definition: config.h:530
#define CONFIG_BZLIB
Definition: config.h:516
#define CONFIG_LZO
Definition: config.h:587
#define NULL
Definition: coverity.c:32
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
Public dictionary API.
static float sub(float src0, float src1)
enum AVCodecID id
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.
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
@ FLAC_METADATA_TYPE_VORBIS_COMMENT
Definition: flac.h:52
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
@ AV_CODEC_ID_PCM_F32LE
Definition: codec_id.h:334
@ AV_CODEC_ID_PCM_S24BE
Definition: codec_id.h:326
@ AV_CODEC_ID_PNG
Definition: codec_id.h:110
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:318
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:313
@ AV_CODEC_ID_GIF
Definition: codec_id.h:146
@ AV_CODEC_ID_SIPR
Definition: codec_id.h:465
@ AV_CODEC_ID_TEXT
raw UTF-8 text
Definition: codec_id.h:525
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:314
@ AV_CODEC_ID_PCM_S24LE
Definition: codec_id.h:325
@ AV_CODEC_ID_SUBRIP
Definition: codec_id.h:541
@ AV_CODEC_ID_PCM_S32LE
Definition: codec_id.h:321
@ AV_CODEC_ID_RA_288
Definition: codec_id.h:411
@ AV_CODEC_ID_PCM_S8
Definition: codec_id.h:317
@ AV_CODEC_ID_AV1
Definition: codec_id.h:279
@ AV_CODEC_ID_TTF
Definition: codec_id.h:553
@ AV_CODEC_ID_PCM_F64LE
Definition: codec_id.h:336
@ AV_CODEC_ID_ALAC
Definition: codec_id.h:440
@ AV_CODEC_ID_WEBVTT
Definition: codec_id.h:542
@ AV_CODEC_ID_RV10
Definition: codec_id.h:54
@ AV_CODEC_ID_TTA
Definition: codec_id.h:446
@ AV_CODEC_ID_RV40
Definition: codec_id.h:118
@ AV_CODEC_ID_HEVC
Definition: codec_id.h:223
@ AV_CODEC_ID_RV30
Definition: codec_id.h:117
@ AV_CODEC_ID_COOK
Definition: codec_id.h:444
@ AV_CODEC_ID_BIN_DATA
Definition: codec_id.h:564
@ AV_CODEC_ID_ATRAC3
Definition: codec_id.h:455
@ AV_CODEC_ID_AAC
Definition: codec_id.h:426
@ AV_CODEC_ID_RV20
Definition: codec_id.h:55
@ AV_CODEC_ID_PRORES
Definition: codec_id.h:197
@ AV_CODEC_ID_TIFF
Definition: codec_id.h:145
@ AV_CODEC_ID_TRUEHD
Definition: codec_id.h:468
@ AV_CODEC_ID_FLAC
Definition: codec_id.h:436
@ AV_CODEC_ID_OTF
Definition: codec_id.h:560
@ AV_CODEC_ID_AC3
Definition: codec_id.h:427
@ AV_CODEC_ID_PCM_S32BE
Definition: codec_id.h:322
@ AV_CODEC_ID_MLP
Definition: codec_id.h:453
@ AV_CODEC_ID_RA_144
Definition: codec_id.h:410
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:56
@ AV_CODEC_ID_WAVPACK
Definition: codec_id.h:449
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:425
@ AV_CODEC_ID_VP9
Definition: codec_id.h:217
enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos)
Converts swscale x/y chroma position to AVChromaLocation.
Definition: utils.c:368
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding.
Definition: avcodec.h:215
@ AVDISCARD_ALL
discard all
Definition: avcodec.h:236
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:75
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:634
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:64
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:99
@ AV_PKT_DATA_SKIP_SAMPLES
Recommmends skipping the specified number of samples.
Definition: packet.h:156
@ AV_PKT_DATA_MASTERING_DISPLAY_METADATA
Mastering display metadata (based on SMPTE-2086:2014).
Definition: packet.h:222
@ AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL
Data found in BlockAdditional element of matroska container.
Definition: packet.h:191
@ AV_PKT_DATA_SPHERICAL
This side data should be associated with a video stream and corresponds to the AVSphericalMapping str...
Definition: packet.h:228
@ AV_PKT_DATA_WEBVTT_SETTINGS
The optional settings (rendering instructions) that immediately follow the timestamp specifier of a W...
Definition: packet.h:202
@ AV_PKT_DATA_PALETTE
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette.
Definition: packet.h:46
@ AV_PKT_DATA_WEBVTT_IDENTIFIER
The optional first identifier line of a WebVTT cue.
Definition: packet.h:196
@ AV_PKT_DATA_CONTENT_LIGHT_LEVEL
Content light level (based on CTA-861.3).
Definition: packet.h:235
uint8_t * av_stream_new_side_data(AVStream *stream, enum AVPacketSideDataType type, size_t size)
Allocate new information from stream.
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:5522
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
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:2013
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:2130
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:143
#define AV_BASE64_SIZE(x)
Calculate the output size needed to base64-encode x bytes to a null-terminated string.
Definition: base64.h:66
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
AVBufferRef * av_buffer_create(uint8_t *data, buffer_size_t size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:29
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
int av_buffer_realloc(AVBufferRef **pbuf, buffer_size_t size)
Reallocate a given buffer.
Definition: buffer.c:169
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:74
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
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 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
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
#define AV_LZO_OUTPUT_FULL
decoded data did not fit into output buffer
Definition: lzo.h:39
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
Definition: lzo.c:134
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
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
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
Definition: rational.c:106
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
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
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:134
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
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:478
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
@ AVMEDIA_TYPE_ATTACHMENT
Opaque data information usually sparse.
Definition: avutil.h:205
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
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 AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVSphericalProjection
Projection of the video surface(s) on a sphere.
Definition: spherical.h:51
AVSphericalMapping * av_spherical_alloc(size_t *size)
Allocate a AVSphericalVideo structure and initialize its fields to default values.
Definition: spherical.c:25
@ AV_SPHERICAL_EQUIRECTANGULAR
Video represents a sphere mapped on a flat surface using equirectangular projection.
Definition: spherical.h:56
@ AV_SPHERICAL_EQUIRECTANGULAR_TILE
Video represents a portion of a sphere mapped on a flat surface using equirectangular projection.
Definition: spherical.h:72
@ AV_SPHERICAL_CUBEMAP
Video frame is split into 6 faces of a cube, and arranged on a 3x2 layout.
Definition: spherical.h:65
int index
Definition: gxfenc.c:89
cl_device_type type
const char * key
int32_t rv
Definition: input.c:405
int i
Definition: input.c:407
static av_always_inline float av_int2float(uint32_t i)
Reinterpret a 32-bit integer as a float.
Definition: intfloat.h:40
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
#define av_log2
Definition: intmath.h:83
const uint8_t ff_log2_tab[256]
Definition: log2_tab.c:23
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom_tags.c:278
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom_tags.c:29
static const struct TransferCharacteristics transfer_characteristics[AVCOL_TRC_NB]
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:1927
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:4945
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:3314
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:4639
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:1941
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3131
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:83
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
version
Definition: libkvazaar.c:326
#define isnan(x)
Definition: libm.h:340
static int is_keyframe(NalUnitType naltype)
Definition: libx265.c:60
uint8_t w
Definition: llviddspenc.c:39
static const struct @322 planes[]
static const uint16_t mask[17]
Definition: lzw.c:38
AVContentLightMetadata * av_content_light_metadata_alloc(size_t *size)
Allocate an AVContentLightMetadata structure and set its fields to default values.
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
int ff_mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
Definition: matroska.c:152
const char *const ff_matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT]
Definition: matroska.c:146
const char *const ff_matroska_video_stereo_mode[MATROSKA_VIDEO_STEREOMODE_TYPE_NB]
Definition: matroska.c:128
const CodecTags ff_mkv_codec_tags[]
Definition: matroska.c:29
const AVMetadataConv ff_mkv_metadata_conv[]
Definition: matroska.c:122
#define MATROSKA_ID_VIDEOPROJECTIONPOSEROLL
Definition: matroska.h:166
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:250
#define MATROSKA_ID_DISCARDPADDING
Definition: matroska.h:244
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:106
#define MATROSKA_ID_TRACKTIMECODESCALE
Definition: matroska.h:112
#define MATROSKA_ID_TAGTARGETS
Definition: matroska.h:214
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:269
#define MATROSKA_ID_TRACKAUDIO
Definition: matroska.h:82
#define MATROSKA_ID_TRACKUID
Definition: matroska.h:79
#define MATROSKA_ID_CUERELATIVEPOSITION
Definition: matroska.h:202
#define MATROSKA_ID_CHAPCOUNTRY
Definition: matroska.h:262
#define MATROSKA_ID_CHAPSTRING
Definition: matroska.h:260
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:178
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:216
#define MATROSKA_ID_CODECDOWNLOADURL
Definition: matroska.h:92
#define MATROSKA_ID_TRACKOPERATION
Definition: matroska.h:83
#define MATROSKA_ID_TRACKFLAGHEARINGIMPAIRED
Definition: matroska.h:101
#define MATROSKA_ID_TRACKFLAGTEXTDESCRIPTIONS
Definition: matroska.h:103
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN
Definition: matroska.h:159
#define MATROSKA_ID_ENCODINGSIGALGO
Definition: matroska.h:187
@ MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT
Definition: matroska.h:308
@ MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL
Definition: matroska.h:311
@ MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP
Definition: matroska.h:309
@ MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL
Definition: matroska.h:321
@ MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
Definition: matroska.h:318
@ MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL
Definition: matroska.h:313
@ MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR
Definition: matroska.h:316
@ MATROSKA_VIDEO_STEREOMODE_TYPE_NB
Definition: matroska.h:322
@ MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR
Definition: matroska.h:320
@ MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM
Definition: matroska.h:310
@ MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR
Definition: matroska.h:312
@ MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL
Definition: matroska.h:315
@ MATROSKA_VIDEO_STEREOMODE_TYPE_MONO
Definition: matroska.h:307
@ MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR
Definition: matroska.h:314
#define MATROSKA_ID_VIDEOSTEREOMODE
Definition: matroska.h:128
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:266
#define MATROSKA_ID_ENCODINGENCAESSETTINGS
Definition: matroska.h:184
#define MATROSKA_ID_CHAPTERS
Definition: matroska.h:63
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:208
#define MATROSKA_ID_TRACKPLANE
Definition: matroska.h:85
#define MATROSKA_ID_TRACKMINCACHE
Definition: matroska.h:107
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
#define MATROSKA_ID_VIDEOCOLORCBSUBVERT
Definition: matroska.h:139
#define MATROSKA_ID_VIDEOPIXELWIDTH
Definition: matroska.h:119
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:230
#define EBML_ID_DOCTYPEVERSION
Definition: matroska.h:41
#define MATROSKA_ID_ENCODINGENCKEYID
Definition: matroska.h:186
#define MATROSKA_ID_ATTACHMENTS
Definition: matroska.h:61
#define MATROSKA_ID_CODECDECODEALL
Definition: matroska.h:93
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:241
#define MATROSKA_ID_TRACKPLANEUID
Definition: matroska.h:86
#define EBML_ID_HEADER
Definition: matroska.h:33
#define MATROSKA_ID_TITLE
Definition: matroska.h:68
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:97
#define MATROSKA_ID_SEEKID
Definition: matroska.h:225
#define MATROSKA_ID_VIDEOCOLORMAXFALL
Definition: matroska.h:147
#define MATROSKA_ID_TAGTARGETS_TYPE
Definition: matroska.h:215
#define MATROSKA_ID_VIDEOCOLOR_GY
Definition: matroska.h:153
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:256
#define MATROSKA_ID_VIDEOFIELDORDER
Definition: matroska.h:127
#define MATROSKA_ID_VIDEOPROJECTIONTYPE
Definition: matroska.h:162
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:170
#define MATROSKA_ID_CODECDELAY
Definition: matroska.h:94
#define MATROSKA_ID_VIDEOALPHAMODE
Definition: matroska.h:129
#define MATROSKA_ID_TRACKNAME
Definition: matroska.h:96
#define MATROSKA_ID_CHAPTERTIMESTART
Definition: matroska.h:257
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define CUES_START
Definition: matroska.h:376
#define MATROSKA_ID_SEEKHEAD
Definition: matroska.h:60
#define MATROSKA_ID_CUETIME
Definition: matroska.h:196
#define EBML_MAX_DEPTH
Definition: matroska.h:364
#define MATROSKA_ID_FILEUID
Definition: matroska.h:252
#define MATROSKA_ID_CLUSTERPREVSIZE
Definition: matroska.h:231
#define MATROSKA_ID_VIDEOCOLORSPACE
Definition: matroska.h:131
#define MATROSKA_ID_VIDEOCOLOR_BY
Definition: matroska.h:155
@ MATROSKA_TRACK_ENCODING_COMP_LZO
Definition: matroska.h:287
@ MATROSKA_TRACK_ENCODING_COMP_ZLIB
Definition: matroska.h:285
@ MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP
Definition: matroska.h:288
@ MATROSKA_TRACK_ENCODING_COMP_BZLIB
Definition: matroska.h:286
#define MATROSKA_ID_VIDEOCOLOR_RY
Definition: matroska.h:151
#define MATROSKA_ID_VIDEOCOLORCBSUBHORZ
Definition: matroska.h:138
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:265
#define MATROSKA_ID_TRACKCOMBINEPLANES
Definition: matroska.h:84
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
#define MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS
Definition: matroska.h:143
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:173
#define MATROSKA_ID_VIDEOCOLOR_BX
Definition: matroska.h:154
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:248
#define MATROSKA_ID_VIDEODISPLAYUNIT
Definition: matroska.h:125
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:237
#define MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ
Definition: matroska.h:140
#define MATROSKA_ID_BLOCKGROUP
Definition: matroska.h:232
#define MATROSKA_ID_TRACKFLAGENABLED
Definition: matroska.h:98
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:172
#define MATROSKA_ID_VIDEOPIXELHEIGHT
Definition: matroska.h:120
@ MATROSKA_COLOUR_CHROMASITINGHORZ_NB
Definition: matroska.h:337
@ MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED
Definition: matroska.h:334
#define MATROSKA_VIDEO_STEREO_PLANE_COUNT
Definition: matroska.h:366
#define MATROSKA_ID_ENCODINGSIGKEYID
Definition: matroska.h:189
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
#define MATROSKA_ID_ENCODINGSIGHASHALGO
Definition: matroska.h:188
#define MATROSKA_ID_TRACKPLANETYPE
Definition: matroska.h:87
#define MATROSKA_ID_VIDEOPIXELCROPL
Definition: matroska.h:123
#define MATROSKA_ID_CUETRACK
Definition: matroska.h:200
@ MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED
Definition: matroska.h:293
@ MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE
Definition: matroska.h:294
@ MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED
Definition: matroska.h:292
#define MATROSKA_ID_INFO
Definition: matroska.h:56
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:213
#define MATROSKA_ID_POINTENTRY
Definition: matroska.h:193
#define MATROSKA_ID_VIDEOPROJECTIONPRIVATE
Definition: matroska.h:163
#define MATROSKA_ID_CHAPTERPHYSEQUIV
Definition: matroska.h:270
#define MATROSKA_ID_TAGS
Definition: matroska.h:59
#define MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT
Definition: matroska.h:141
#define MATROSKA_ID_TRACKFLAGORIGINAL
Definition: matroska.h:104
#define MATROSKA_ID_VIDEOCOLORMASTERINGMETA
Definition: matroska.h:149
#define CUES_END
Definition: matroska.h:377
#define MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ
Definition: matroska.h:136
@ MATROSKA_VIDEO_FIELDORDER_TB
Definition: matroska.h:302
@ MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE
Definition: matroska.h:298
@ MATROSKA_VIDEO_FIELDORDER_BT
Definition: matroska.h:303
@ MATROSKA_VIDEO_FIELDORDER_BB
Definition: matroska.h:301
@ MATROSKA_VIDEO_FIELDORDER_UNDETERMINED
Definition: matroska.h:300
@ MATROSKA_VIDEO_FIELDORDER_TT
Definition: matroska.h:299
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX
Definition: matroska.h:158
#define MATROSKA_ID_BLOCK
Definition: matroska.h:240
#define MATROSKA_ID_TAGLANG
Definition: matroska.h:211
#define MATROSKA_ID_CHAPTERFLAGHIDDEN
Definition: matroska.h:268
#define MATROSKA_ID_TAGSTRING
Definition: matroska.h:210
#define MATROSKA_ID_CLUSTER
Definition: matroska.h:62
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL
Definition: matroska.h:135
#define MATROSKA_ID_CODECINFOURL
Definition: matroska.h:91
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:111
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:242
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:258
#define MATROSKA_ID_CODECSTATE
Definition: matroska.h:243
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:118
#define MATROSKA_ID_ATTACHEDFILE
Definition: matroska.h:247
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
#define FILENAME
Definition: matroska.h:378
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
#define MATROSKA_ID_SEGMENTUID
Definition: matroska.h:72
#define MATROSKA_ID_ENCODINGENCRYPTION
Definition: matroska.h:183
#define MATROSKA_ID_ENCODINGENCALGO
Definition: matroska.h:185
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_TRACKCONTENTENCODINGS
Definition: matroska.h:110
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:109
#define MATROSKA_ID_VIDEOFRAMERATE
Definition: matroska.h:116
#define CLUSTER_KEYFRAME
Definition: matroska.h:381
#define MATROSKA_ID_ENCODINGCOMPRESSION
Definition: matroska.h:179
@ MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP
Definition: matroska.h:350
@ MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR
Definition: matroska.h:348
@ MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR
Definition: matroska.h:349
#define MATROSKA_ID_TRACKS
Definition: matroska.h:57
#define MATROSKA_ID_VIDEOFLAGINTERLACED
Definition: matroska.h:126
#define MATROSKA_ID_VIDEOCOLORCHROMASUBVERT
Definition: matroska.h:137
#define MATROSKA_ID_ENCODINGORDER
Definition: matroska.h:176
#define MATROSKA_ID_FILENAME
Definition: matroska.h:249
#define MATROSKA_ID_TRACKFLAGFORCED
Definition: matroska.h:100
#define MATROSKA_ID_TRACKVIDEO
Definition: matroska.h:81
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:218
#define DURATION
Definition: matroska.h:380
#define MATROSKA_ID_VIDEOCOLORRANGE
Definition: matroska.h:142
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:251
#define MATROSKA_ID_TRACKMAXBLKADDID
Definition: matroska.h:113
#define MATROSKA_ID_VIDEOCOLOR_RX
Definition: matroska.h:150
#define MATROSKA_ID_BLOCKADDITIONAL
Definition: matroska.h:236
#define MATROSKA_ID_TRACKMAXCACHE
Definition: matroska.h:108
#define MATROSKA_ID_TAGTARGETS_TRACKUID
Definition: matroska.h:217
#define MATROSKA_ID_ENCODINGCOMPALGO
Definition: matroska.h:180
#define EBML_ID_VOID
Definition: matroska.h:45
#define MATROSKA_ID_CUEDURATION
Definition: matroska.h:203
#define EBML_ID_EBMLMAXIDLENGTH
Definition: matroska.h:38
#define MATROSKA_ID_TRACKFLAGDEFAULT
Definition: matroska.h:99
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:130
#define MATROSKA_ID_SEEKENTRY
Definition: matroska.h:222
#define MATROSKA_ID_VIDEOCOLOR_WHITEY
Definition: matroska.h:157
#define MATROSKA_ID_VIDEOCOLORMAXCLL
Definition: matroska.h:146
@ MATROSKA_TRACK_TYPE_VIDEO
Definition: matroska.h:274
@ MATROSKA_TRACK_TYPE_METADATA
Definition: matroska.h:281
@ MATROSKA_TRACK_TYPE_SUBTITLE
Definition: matroska.h:278
@ MATROSKA_TRACK_TYPE_AUDIO
Definition: matroska.h:275
#define MATROSKA_ID_VIDEOCOLORPRIMARIES
Definition: matroska.h:145
#define MATROSKA_ID_BLOCKADDID
Definition: matroska.h:235
#define MATROSKA_ID_VIDEOCOLOR_WHITEX
Definition: matroska.h:156
#define EBML_ID_EBMLMAXSIZELENGTH
Definition: matroska.h:39
#define MATROSKA_ID_SEEKPOSITION
Definition: matroska.h:226
#define BANDWIDTH
Definition: matroska.h:379
#define MATROSKA_ID_CODECPRIVATE
Definition: matroska.h:89
#define MATROSKA_ID_TAGNAME
Definition: matroska.h:209
#define MATROSKA_ID_DURATION
Definition: matroska.h:67
#define MATROSKA_ID_CHAPTERUID
Definition: matroska.h:267
#define MATROSKA_ID_CODECID
Definition: matroska.h:88
#define MATROSKA_ID_BLOCKMORE
Definition: matroska.h:234
#define MATROSKA_ID_TRACKFLAGVISUALIMPAIRED
Definition: matroska.h:102
#define MATROSKA_ID_CUEBLOCKNUMBER
Definition: matroska.h:204
#define EBML_ID_CRC32
Definition: matroska.h:46
#define MATROSKA_ID_ENCODINGCOMPSETTINGS
Definition: matroska.h:181
#define MATROSKA_ID_TRACKFLAGCOMMENTARY
Definition: matroska.h:105
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:201
#define MATROSKA_ID_CUES
Definition: matroska.h:58
#define MATROSKA_ID_VIDEOPROJECTIONPOSEYAW
Definition: matroska.h:164
#define MATROSKA_ID_ENCODINGSIGNATURE
Definition: matroska.h:190
#define MATROSKA_ID_VIDEOPIXELCROPB
Definition: matroska.h:121
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:197
#define MATROSKA_ID_ENCODINGSCOPE
Definition: matroska.h:177
#define MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH
Definition: matroska.h:165
#define MATROSKA_ID_EDITIONENTRY
Definition: matroska.h:255
#define MATROSKA_ID_CLUSTERTIMECODE
Definition: matroska.h:229
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:263
#define MATROSKA_ID_VIDEOCOLOR
Definition: matroska.h:132
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:117
#define MATROSKA_ID_CHAPTERDISPLAY
Definition: matroska.h:259
#define MATROSKA_ID_VIDEOCOLORMATRIXCOEFF
Definition: matroska.h:134
#define MATROSKA_ID_TAGDEFAULT
Definition: matroska.h:212
#define INITIALIZATION_RANGE
Definition: matroska.h:375
#define MATROSKA_ID_TAG
Definition: matroska.h:207
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
#define MATROSKA_ID_CHAPLANG
Definition: matroska.h:261
#define MATROSKA_ID_VIDEOPROJECTION
Definition: matroska.h:161
@ MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED
Definition: matroska.h:341
@ MATROSKA_COLOUR_CHROMASITINGVERT_NB
Definition: matroska.h:344
#define MATROSKA_ID_AUDIOSAMPLINGFREQ
Definition: matroska.h:169
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:122
#define EBML_ID_EBMLREADVERSION
Definition: matroska.h:37
#define TRACK_NUMBER
Definition: matroska.h:383
@ MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN
Definition: matroska.h:330
@ MATROSKA_VIDEO_DISPLAYUNIT_PIXELS
Definition: matroska.h:326
#define CUE_TIMESTAMPS
Definition: matroska.h:382
#define MATROSKA_ID_BLOCKADDITIONS
Definition: matroska.h:233
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:264
#define MATROSKA_ID_WRITINGAPP
Definition: matroska.h:69
#define MATROSKA_ID_TAGTARGETS_ATTACHUID
Definition: matroska.h:219
#define MATROSKA_ID_SEGMENT
Definition: matroska.h:53
#define MATROSKA_ID_VIDEOCOLOR_GX
Definition: matroska.h:152
#define MATROSKA_ID_VIDEOPIXELCROPR
Definition: matroska.h:124
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:3198
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:4262
static EbmlSyntax matroska_index_entry[3]
Definition: matroskadec.c:416
static EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:681
static const AVClass webm_dash_class
Definition: matroskadec.c:4334
static EbmlSyntax matroska_track_combine_planes[2]
Definition: matroskadec.c:414
static const char *const matroska_doctypes[]
Definition: matroskadec.c:789
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number, int eof_forbidden)
Definition: matroskadec.c:864
static EbmlSyntax matroska_cluster_enter[]
Definition: matroskadec.c:764
static EbmlSyntax matroska_attachments[2]
Definition: matroskadec.c:415
static int is_ebml_id_valid(uint32_t id)
Definition: matroskadec.c:1162
static EbmlSyntax * ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
Definition: matroskadec.c:1106
EbmlType
Definition: matroskadec.c:78
@ EBML_NEST
Definition: matroskadec.c:86
@ EBML_STR
Definition: matroskadec.c:83
@ EBML_UTF8
Definition: matroskadec.c:84
@ EBML_STOP
Definition: matroskadec.c:88
@ EBML_FLOAT
Definition: matroskadec.c:82
@ EBML_NONE
Definition: matroskadec.c:79
@ EBML_UINT
Definition: matroskadec.c:80
@ EBML_LEVEL1
Definition: matroskadec.c:87
@ EBML_TYPE_COUNT
Definition: matroskadec.c:89
@ EBML_BIN
Definition: matroskadec.c:85
@ EBML_SINT
Definition: matroskadec.c:81
static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
Definition: matroskadec.c:4182
static EbmlSyntax matroska_segments[]
Definition: matroskadec.c:724
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, uint64_t num)
Definition: matroskadec.c:1610
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:3613
static EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:671
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, int size, int type, AVIOContext *pb, uint32_t lace_size[256], int *laces)
Definition: matroskadec.c:3102
static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:4322
static EbmlSyntax matroska_chapters[2]
Definition: matroskadec.c:415
static EbmlSyntax matroska_track_encoding_compression[]
Definition: matroskadec.c:518
static const AVOption options[]
Definition: matroskadec.c:4328
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t default_value, uint64_t *num)
Definition: matroskadec.c:942
static int ebml_read_ascii(AVIOContext *pb, int size, const char *default_value, char **str)
Definition: matroskadec.c:1006
#define UNKNOWN_EQUIV
Definition: matroskadec.c:76
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1528
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, AVIOContext *pb, int64_t *num)
Definition: matroskadec.c:1087
static EbmlSyntax matroska_track_encoding[6]
Definition: matroskadec.c:413
static int matroska_read_close(AVFormatContext *s)
Definition: matroskadec.c:3903
static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
Definition: matroskadec.c:2307
static const CodecMime mkv_image_mime_tags[]
Definition: matroskadec.c:770
#define NEEDS_CHECKING
Definition: matroskadec.c:73
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3763
static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
Definition: matroskadec.c:4089
static EbmlSyntax matroska_track_plane[]
Definition: matroskadec.c:548
static EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:701
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:2003
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length, int64_t pos)
Definition: matroskadec.c:1065
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1799
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1764
static int ebml_read_sint(AVIOContext *pb, int size, int64_t default_value, int64_t *num)
Definition: matroskadec.c:963
static EbmlSyntax matroska_chapter[6]
Definition: matroskadec.c:415
static EbmlSyntax matroska_info[]
Definition: matroskadec.c:436
#define LEVEL_ENDED
Definition: matroskadec.c:74
static EbmlSyntax matroska_track_video[19]
Definition: matroskadec.c:412
static EbmlSyntax matroska_track_operation[2]
Definition: matroskadec.c:414
static EbmlSyntax matroska_chapter_entry[9]
Definition: matroskadec.c:415
static EbmlSyntax matroska_mastering_meta[]
Definition: matroskadec.c:447
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1119
static void mkv_stereo_mode_display_mul(int stereo_mode, int *h_width, int *h_height)
Definition: matroskadec.c:2101
static EbmlSyntax matroska_track[32]
Definition: matroskadec.c:413
static int ebml_read_float(AVIOContext *pb, int size, double default_value, double *num)
Definition: matroskadec.c:986
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3962
static EbmlSyntax matroska_index[2]
Definition: matroskadec.c:416
static EbmlSyntax matroska_blockmore[]
Definition: matroskadec.c:729
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3097
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
Definition: matroskadec.c:817
static EbmlSyntax matroska_segment[9]
Definition: matroskadec.c:412
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1209
static int matroska_reset_status(MatroskaDemuxContext *matroska, uint32_t id, int64_t position)
Definition: matroskadec.c:796
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1973
static EbmlSyntax matroska_tags[2]
Definition: matroskadec.c:416
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t **data, int *size)
Definition: matroskadec.c:3276
static EbmlSyntax matroska_tag[3]
Definition: matroskadec.c:416
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:2903
static EbmlSyntax ebml_syntax[3]
Definition: matroskadec.c:412
static EbmlSyntax matroska_track_video_projection[]
Definition: matroskadec.c:479
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id, int64_t pos)
Definition: matroskadec.c:1175
static EbmlSyntax matroska_chapter_display[]
Definition: matroskadec.c:618
static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: matroskadec.c:3839
static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1940
static int matroska_parse_tracks(AVFormatContext *s)
Definition: matroskadec.c:2335
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
Definition: matroskadec.c:2013
static EbmlSyntax matroska_track_encoding_encryption[]
Definition: matroskadec.c:524
#define SKIP_THRESHOLD
Definition: matroskadec.c:75
static EbmlSyntax ebml_header[]
Definition: matroskadec.c:419
static int matroska_probe(const AVProbeData *p)
Definition: matroskadec.c:1563
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:3381
static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track, void *logctx)
Definition: matroskadec.c:2210
static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb, uint64_t *number)
Read a EBML length value.
Definition: matroskadec.c:929
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1624
static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track)
Definition: matroskadec.c:2126
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:3070
static EbmlSyntax matroska_seekhead[2]
Definition: matroskadec.c:416
static EbmlSyntax matroska_track_encodings[2]
Definition: matroskadec.c:413
static EbmlSyntax matroska_tracks[2]
Definition: matroskadec.c:414
static EbmlSyntax matroska_blockadditions[2]
Definition: matroskadec.c:417
AVInputFormat ff_webm_dash_manifest_demuxer
Definition: matroskadec.c:4354
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int64_t pos)
Definition: matroskadec.c:1864
static EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:510
#define OFFSET(x)
Definition: matroskadec.c:4327
static int ebml_read_binary(AVIOContext *pb, int length, int64_t pos, EbmlBin *bin)
Definition: matroskadec.c:1037
static int matroska_aac_profile(char *codec_id)
Definition: matroskadec.c:1992
static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
Definition: matroskadec.c:2074
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:4008
static int matroska_parse_flac(AVFormatContext *s, MatroskaTrack *track, int *offset)
Definition: matroskadec.c:2019
static EbmlSyntax matroska_track_video_color[15]
Definition: matroskadec.c:412
static EbmlSyntax matroska_cluster_parsing[8]
Definition: matroskadec.c:417
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:3496
static EbmlSyntax matroska_index_pos[]
Definition: matroskadec.c:651
static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start)
Definition: matroskadec.c:3931
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:4341
#define EBML_UNKNOWN_LENGTH
Definition: matroskadec.c:72
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3819
static EbmlSyntax matroska_attachment[]
Definition: matroskadec.c:604
#define CHILD_OF(parent)
Definition: matroskadec.c:406
static int matroska_parse_prores(MatroskaTrack *track, uint8_t **data, int *size)
Definition: matroskadec.c:3360
static const CodecMime mkv_mime_tags[]
Definition: matroskadec.c:779
static EbmlSyntax matroska_blockgroup[8]
Definition: matroskadec.c:417
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1902
uint32_t tag
Definition: movenc.c:1611
unsigned bps
Definition: movenc.c:1612
const int avpriv_mpeg4audio_sample_rates[16]
Definition: mpeg4audio.c:62
const char data[16]
Definition: mxf.c:142
uint8_t interlaced
Definition: mxfenc.c:2208
UID uid
Definition: mxfenc.c:2205
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
AVOptions.
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:279
@ AVCOL_RANGE_UNSPECIFIED
Definition: pixfmt.h:552
@ AVCOL_RANGE_JPEG
Full range content.
Definition: pixfmt.h:586
#define AVPALETTE_COUNT
Definition: pixfmt.h:33
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
@ AVCOL_PRI_RESERVED
Definition: pixfmt.h:462
@ AVCOL_PRI_UNSPECIFIED
Definition: pixfmt.h:461
@ AVCOL_PRI_RESERVED0
Definition: pixfmt.h:459
@ AVCOL_TRC_RESERVED
Definition: pixfmt.h:487
@ AVCOL_TRC_UNSPECIFIED
Definition: pixfmt.h:486
@ AVCOL_TRC_RESERVED0
Definition: pixfmt.h:484
@ AVCOL_SPC_UNSPECIFIED
Definition: pixfmt.h:515
@ AVCOL_SPC_RESERVED
Definition: pixfmt.h:516
const char * name
Definition: qsvenc.c:46
mfxU16 profile
Definition: qsvenc.c:45
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:323
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:33
internal header for RIFF based (de)muxers do NOT include this in end user applications
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
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
const unsigned char ff_sipr_subpk_size[4]
Definition: rmsipr.c:25
static const uint8_t header[24]
Definition: sdr2.c:67
static char buffer[20]
Definition: seek.c:32
static int segment_start(AVFormatContext *s, int write_header)
Definition: segment.c:239
#define FF_ARRAY_ELEMS(a)
#define snprintf
Definition: snprintf.h:34
unsigned int pos
Definition: spdifenc.c:412
Spherical video.
A reference to a data buffer.
Definition: buffer.h:84
uint8_t * data
The data buffer.
Definition: buffer.h:92
Describe the class of an AVClass context structure.
Definition: log.h:67
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
enum AVColorSpace color_space
Definition: codec_par.h:149
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
int frame_size
Audio only.
Definition: codec_par.h:181
enum AVFieldOrder field_order
Video only.
Definition: codec_par.h:141
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
int channels
Audio only.
Definition: codec_par.h:166
int width
Video only.
Definition: codec_par.h:126
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
int seek_preroll
Audio only.
Definition: codec_par.h:200
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
int block_align
Audio only.
Definition: codec_par.h:177
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
enum AVColorPrimaries color_primaries
Definition: codec_par.h:147
int sample_rate
Audio only.
Definition: codec_par.h:170
enum AVColorTransferCharacteristic color_trc
Definition: codec_par.h:148
int initial_padding
Audio only.
Definition: codec_par.h:189
enum AVChromaLocation chroma_location
Definition: codec_par.h:150
enum AVColorRange color_range
Video only.
Definition: codec_par.h:146
Content light level needed by to transmit HDR over HDMI (CTA-861.3).
unsigned MaxFALL
Max average light level per frame (cd/m^2).
unsigned MaxCLL
Max content light level (cd/m^2).
char * value
Definition: dict.h:83
Format I/O context.
Definition: avformat.h:1232
AVIOContext * pb
I/O context.
Definition: avformat.h:1274
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1363
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1347
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1501
Bytestream IO Context.
Definition: avio.h:161
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
int64_t pos
Definition: avformat.h:804
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:805
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
Mastering display metadata capable of representing the color volume of the display used to master the...
int has_primaries
Flag indicating whether the display primaries (and white point) are set.
AVRational max_luminance
Max luminance of mastering display (cd/m^2).
AVRational min_luminance
Min luminance of mastering display (cd/m^2).
AVRational display_primaries[3][2]
CIE 1931 xy chromaticity coords of color primaries (r, g, b order).
AVRational white_point[2]
CIE 1931 xy chromaticity coords of white point.
int has_luminance
Flag indicating whether the luminance (min_ and max_) have been set.
AVOption.
Definition: opt.h:248
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:352
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int size
Definition: packet.h:370
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:387
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:362
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:368
uint8_t * data
Definition: packet.h:369
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:389
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int num
Numerator.
Definition: rational.h:59
int den
Denominator.
Definition: rational.h:60
This structure describes how to handle spherical videos, outlining information about projection,...
Definition: spherical.h:82
uint32_t bound_left
Distance from the left edge.
Definition: spherical.h:167
enum AVSphericalProjection projection
Projection type.
Definition: spherical.h:86
uint32_t bound_top
Distance from the top edge.
Definition: spherical.h:168
uint32_t bound_bottom
Distance from the bottom edge.
Definition: spherical.h:170
uint32_t bound_right
Distance from the right edge.
Definition: spherical.h:169
int32_t pitch
Rotation around the right vector [-90, 90].
Definition: spherical.h:127
int32_t roll
Rotation around the forward vector [-180, 180].
Definition: spherical.h:128
int32_t yaw
Rotation around the up vector [-180, 180].
Definition: spherical.h:126
uint32_t padding
Number of pixels to pad from the edge of each cube face.
Definition: spherical.h:182
int skip_to_keyframe
Indicates that everything up to the next keyframe should be discarded.
Definition: internal.h:253
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:935
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:928
AVDictionary * metadata
Definition: avformat.h:937
int index
stream index in AVFormatContext
Definition: avformat.h:874
int nb_index_entries
Definition: avformat.h:1092
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:955
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:946
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:902
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1090
enum AVStreamParseType need_parsing
Definition: avformat.h:1081
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1015
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1113
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:926
enum AVCodecID id
Definition: internal.h:49
char str[22]
Definition: matroska.h:359
enum AVCodecID id
Definition: matroska.h:360
uint64_t u
Definition: matroskadec.c:94
unsigned count
Definition: matroskadec.c:99
union CountedElement::@263 el
int64_t end_time_ns
Definition: matroskadec.c:3922
int64_t start_offset
Definition: matroskadec.c:3923
int64_t end_offset
Definition: matroskadec.c:3924
int64_t start_time_ns
Definition: matroskadec.c:3921
int64_t pos
Definition: matroskadec.c:127
int size
Definition: matroskadec.c:124
uint8_t * data
Definition: matroskadec.c:126
AVBufferRef * buf
Definition: matroskadec.c:125
unsigned int alloc_elem_size
Definition: matroskadec.c:119
void * elem
Definition: matroskadec.c:120
int nb_elem
Definition: matroskadec.c:118
size_t data_offset
Definition: matroskadec.c:107
size_t list_elem_size
Definition: matroskadec.c:106
uint32_t id
Definition: matroskadec.c:103
union EbmlSyntax::@264 def
const struct EbmlSyntax * n
Definition: matroskadec.c:113
uint8_t is_counted
Definition: matroskadec.c:105
int64_t i
Definition: matroskadec.c:109
const char * s
Definition: matroskadec.c:112
double f
Definition: matroskadec.c:111
uint8_t type
Definition: matroskadec.c:104
uint64_t u
Definition: matroskadec.c:110
uint64_t version
Definition: matroskadec.c:131
uint64_t max_size
Definition: matroskadec.c:132
char * doctype
Definition: matroskadec.c:134
uint64_t doctype_version
Definition: matroskadec.c:135
uint64_t id_length
Definition: matroskadec.c:133
AVStream * stream
Definition: matroskadec.c:277
uint64_t additional_id
Definition: matroskadec.c:335
int64_t discard_padding
Definition: matroskadec.c:337
CountedElement reference
Definition: matroskadec.c:332
uint64_t non_simple
Definition: matroskadec.c:333
EbmlBin additional
Definition: matroskadec.c:336
uint64_t duration
Definition: matroskadec.c:331
uint64_t start
Definition: matroskadec.c:281
AVChapter * chapter
Definition: matroskadec.c:286
MatroskaBlock block
Definition: matroskadec.c:341
uint64_t timecode
Definition: matroskadec.c:342
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:357
AVFormatContext * ctx
Definition: matroskadec.c:354
PacketList * queue_end
Definition: matroskadec.c:382
MatroskaLevel1Element level1_elems[64]
Definition: matroskadec.c:394
PacketList * queue
Definition: matroskadec.c:381
uint64_t skip_to_timecode
Definition: matroskadec.c:388
MatroskaCluster current_cluster
Definition: matroskadec.c:397
EbmlList pos
Definition: matroskadec.c:296
uint64_t time
Definition: matroskadec.c:295
uint64_t length
Definition: matroskadec.c:327
uint64_t start
Definition: matroskadec.c:326
CountedElement min_luminance
Definition: matroskadec.c:165
uint64_t chapteruid
Definition: matroskadec.c:311
uint64_t typevalue
Definition: matroskadec.c:309
uint64_t attachuid
Definition: matroskadec.c:312
char * name
Definition: matroskadec.c:300
EbmlList sub
Definition: matroskadec.c:304
char * string
Definition: matroskadec.c:301
char * lang
Definition: matroskadec.c:302
uint64_t def
Definition: matroskadec.c:303
MatroskaTagTarget target
Definition: matroskadec.c:316
EbmlList tag
Definition: matroskadec.c:317
uint64_t buf_timecode
Definition: matroskadec.c:222
MatroskaTrackCompression compression
Definition: matroskadec.c:151
MatroskaTrackEncryption encryption
Definition: matroskadec.c:152
uint64_t transfer_characteristics
Definition: matroskadec.c:178
MatroskaMasteringMeta mastering_meta
Definition: matroskadec.c:182
uint64_t pixel_height
Definition: matroskadec.c:198
uint64_t display_height
Definition: matroskadec.c:196
uint64_t stereo_mode
Definition: matroskadec.c:203
MatroskaTrackVideoProjection projection
Definition: matroskadec.c:206
uint64_t pixel_width
Definition: matroskadec.c:197
uint64_t display_unit
Definition: matroskadec.c:200
uint64_t display_width
Definition: matroskadec.c:195
uint64_t field_order
Definition: matroskadec.c:202
uint64_t uid
Definition: matroskadec.c:237
uint64_t flag_hearingimpaired
Definition: matroskadec.c:248
uint64_t flag_textdescriptions
Definition: matroskadec.c:250
MatroskaTrackAudio audio
Definition: matroskadec.c:254
uint64_t flag_comment
Definition: matroskadec.c:247
uint64_t seek_preroll
Definition: matroskadec.c:252
AVStream * stream
Definition: matroskadec.c:260
double time_scale
Definition: matroskadec.c:243
char * codec_id
Definition: matroskadec.c:240
uint64_t max_block_additional_id
Definition: matroskadec.c:264
EbmlBin codec_priv
Definition: matroskadec.c:241
uint64_t num
Definition: matroskadec.c:236
EbmlList encodings
Definition: matroskadec.c:256
uint64_t codec_delay_in_track_tb
Definition: matroskadec.c:258
uint64_t flag_default
Definition: matroskadec.c:245
int64_t end_timecode
Definition: matroskadec.c:261
uint64_t flag_visualimpaired
Definition: matroskadec.c:249
uint32_t palette[AVPALETTE_COUNT]
Definition: matroskadec.c:266
CountedElement flag_original
Definition: matroskadec.c:251
char * language
Definition: matroskadec.c:242
MatroskaTrackOperation operation
Definition: matroskadec.c:255
uint64_t default_duration
Definition: matroskadec.c:244
uint64_t type
Definition: matroskadec.c:238
uint64_t flag_forced
Definition: matroskadec.c:246
uint64_t codec_delay
Definition: matroskadec.c:257
MatroskaTrackVideo video
Definition: matroskadec.c:253
AVPacket pkt
Definition: dct.c:53
uint8_t level
Definition: svq3.c:206
#define av_free(p)
#define av_malloc_array(a, b)
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
static uint8_t tmp[11]
Definition: aes_ctr.c:27
#define src
Definition: vp8dsp.c:255
static int16_t block[64]
Definition: dct.c:116
int64_t duration
Definition: movenc.c:64
AVPacket * pkt
Definition: movenc.c:59
int out_size
Definition: movenc.c:55
int size
enum AVCodecID codec_id
Definition: vaapi_decode.c:369
uint32_t fourcc
Definition: vaapi_decode.c:239
const char * b
Definition: vf_curves.c:118
const char * r
Definition: vf_curves.c:116
else temp
Definition: vf_mcdeint.c:259
if(ret< 0)
Definition: vf_mcdeint.c:282
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:198
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
int len
uint8_t bits
Definition: vp3data.h:141
#define update_pos(td, mb_y, mb_x)
Definition: vp8.c:2362
static double c[64]