FFmpeg
matroskadec.c
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1 /*
2  * Matroska file demuxer
3  * Copyright (c) 2003-2008 The FFmpeg Project
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Matroska file demuxer
25  * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26  * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27  * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28  * @see specs available on the Matroska project page: http://www.matroska.org/
29  */
30 
31 #include "config.h"
32 
33 #include <inttypes.h>
34 #include <stdio.h>
35 
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
46 #include "libavutil/spherical.h"
47 
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/flac.h"
50 #include "libavcodec/mpeg4audio.h"
51 
52 #include "avformat.h"
53 #include "avio_internal.h"
54 #include "internal.h"
55 #include "isom.h"
56 #include "matroska.h"
57 #include "oggdec.h"
58 /* For ff_codec_get_id(). */
59 #include "riff.h"
60 #include "rmsipr.h"
61 
62 #if CONFIG_BZLIB
63 #include <bzlib.h>
64 #endif
65 #if CONFIG_ZLIB
66 #include <zlib.h>
67 #endif
68 
69 #include "qtpalette.h"
70 
71 #define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
72 #define NEEDS_CHECKING 2 /* Indicates that some error checks
73  * still need to be performed */
74 #define LEVEL_ENDED 3 /* return value of ebml_parse when the
75  * syntax level used for parsing ended. */
76 #define SKIP_THRESHOLD 1024 * 1024 /* In non-seekable mode, if more than SKIP_THRESHOLD
77  * of unkown, potentially damaged data is encountered,
78  * it is considered an error. */
79 #define UNKNOWN_EQUIV 50 * 1024 /* An unknown element is considered equivalent
80  * to this many bytes of unknown data for the
81  * SKIP_THRESHOLD check. */
82 
83 typedef enum {
95 } EbmlType;
96 
97 typedef const struct EbmlSyntax {
98  uint32_t id;
102  union {
103  int64_t i;
104  uint64_t u;
105  double f;
106  const char *s;
107  const struct EbmlSyntax *n;
108  } def;
109 } EbmlSyntax;
110 
111 typedef struct EbmlList {
112  int nb_elem;
113  void *elem;
114 } EbmlList;
115 
116 typedef struct EbmlBin {
117  int size;
120  int64_t pos;
121 } EbmlBin;
122 
123 typedef struct Ebml {
124  uint64_t version;
125  uint64_t max_size;
126  uint64_t id_length;
127  char *doctype;
128  uint64_t doctype_version;
129 } Ebml;
130 
131 typedef struct MatroskaTrackCompression {
132  uint64_t algo;
135 
136 typedef struct MatroskaTrackEncryption {
137  uint64_t algo;
140 
141 typedef struct MatroskaTrackEncoding {
142  uint64_t scope;
143  uint64_t type;
147 
148 typedef struct MatroskaMasteringMeta {
149  double r_x;
150  double r_y;
151  double g_x;
152  double g_y;
153  double b_x;
154  double b_y;
155  double white_x;
156  double white_y;
160 
161 typedef struct MatroskaTrackVideoColor {
164  uint64_t chroma_sub_horz;
165  uint64_t chroma_sub_vert;
166  uint64_t cb_sub_horz;
167  uint64_t cb_sub_vert;
170  uint64_t range;
172  uint64_t primaries;
173  uint64_t max_cll;
174  uint64_t max_fall;
177 
179  uint64_t type;
180  EbmlBin private;
181  double yaw;
182  double pitch;
183  double roll;
185 
186 typedef struct MatroskaTrackVideo {
187  double frame_rate;
188  uint64_t display_width;
189  uint64_t display_height;
190  uint64_t pixel_width;
191  uint64_t pixel_height;
193  uint64_t display_unit;
194  uint64_t interlaced;
195  uint64_t field_order;
196  uint64_t stereo_mode;
197  uint64_t alpha_mode;
201 
202 typedef struct MatroskaTrackAudio {
203  double samplerate;
205  uint64_t bitdepth;
206  uint64_t channels;
207 
208  /* real audio header (extracted from extradata) */
214  int pkt_cnt;
215  uint64_t buf_timecode;
218 
219 typedef struct MatroskaTrackPlane {
220  uint64_t uid;
221  uint64_t type;
223 
224 typedef struct MatroskaTrackOperation {
227 
228 typedef struct MatroskaTrack {
229  uint64_t num;
230  uint64_t uid;
231  uint64_t type;
232  char *name;
233  char *codec_id;
235  char *language;
236  double time_scale;
238  uint64_t flag_default;
239  uint64_t flag_forced;
240  uint64_t seek_preroll;
245  uint64_t codec_delay;
247 
249  int64_t end_timecode;
252 
253  uint32_t palette[AVPALETTE_COUNT];
255 } MatroskaTrack;
256 
257 typedef struct MatroskaAttachment {
258  uint64_t uid;
259  char *filename;
260  char *mime;
262 
265 
266 typedef struct MatroskaChapter {
267  uint64_t start;
268  uint64_t end;
269  uint64_t uid;
270  char *title;
271 
274 
275 typedef struct MatroskaIndexPos {
276  uint64_t track;
277  uint64_t pos;
279 
280 typedef struct MatroskaIndex {
281  uint64_t time;
283 } MatroskaIndex;
284 
285 typedef struct MatroskaTag {
286  char *name;
287  char *string;
288  char *lang;
289  uint64_t def;
291 } MatroskaTag;
292 
293 typedef struct MatroskaTagTarget {
294  char *type;
295  uint64_t typevalue;
296  uint64_t trackuid;
297  uint64_t chapteruid;
298  uint64_t attachuid;
300 
301 typedef struct MatroskaTags {
304 } MatroskaTags;
305 
306 typedef struct MatroskaSeekhead {
307  uint64_t id;
308  uint64_t pos;
310 
311 typedef struct MatroskaLevel {
312  uint64_t start;
313  uint64_t length;
314 } MatroskaLevel;
315 
316 typedef struct MatroskaBlock {
317  uint64_t duration;
318  int64_t reference;
319  uint64_t non_simple;
321  uint64_t additional_id;
324 } MatroskaBlock;
325 
326 typedef struct MatroskaCluster {
328  uint64_t timecode;
329  int64_t pos;
331 
332 typedef struct MatroskaLevel1Element {
333  int64_t pos;
334  uint32_t id;
335  int parsed;
337 
338 typedef struct MatroskaDemuxContext {
339  const AVClass *class;
341 
342  /* EBML stuff */
345  uint32_t current_id;
346  int64_t resync_pos;
348 
349  uint64_t time_scale;
350  double duration;
351  char *title;
352  char *muxingapp;
360 
361  /* byte position of the segment inside the stream */
362  int64_t segment_start;
363 
364  /* the packet queue */
367 
368  int done;
369 
370  /* What to skip before effectively reading a packet. */
373 
374  /* File has a CUES element, but we defer parsing until it is needed. */
376 
377  /* Level1 elements and whether they were read yet */
378  MatroskaLevel1Element level1_elems[64];
380 
382 
383  /* WebM DASH Manifest live flag */
384  int is_live;
385 
386  /* Bandwidth value for WebM DASH Manifest */
389 
390 #define CHILD_OF(parent) { .def = { .n = parent } }
391 
392 // The following forward declarations need their size because
393 // a tentative definition with internal linkage must not be an
394 // incomplete type (6.7.2 in C90, 6.9.2 in C99).
395 // Removing the sizes breaks MSVC.
402 
404  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
405  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
406  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
407  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
408  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
410  { EBML_ID_DOCTYPEVERSION, EBML_NONE },
411  CHILD_OF(ebml_syntax)
412 };
413 
414 static EbmlSyntax ebml_syntax[] = {
415  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
417  { 0 }
418 };
419 
421  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
423  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
425  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
426  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
427  { MATROSKA_ID_SEGMENTUID, EBML_NONE },
428  CHILD_OF(matroska_segment)
429 };
430 
432  { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
433  { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
434  { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
435  { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
436  { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
437  { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
438  { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
439  { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
440  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
441  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
442  CHILD_OF(matroska_track_video_color)
443 };
444 
445 static EbmlSyntax matroska_track_video_color[] = {
446  { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
447  { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
448  { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
449  { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
450  { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
451  { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
457  { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
458  { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
459  { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
460  CHILD_OF(matroska_track_video)
461 };
462 
469  CHILD_OF(matroska_track_video)
470 };
471 
472 static EbmlSyntax matroska_track_video[] = {
473  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
474  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
475  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
476  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
477  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
478  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
479  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
480  { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
481  { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
483  { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
484  { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
485  { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
490  { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
491  CHILD_OF(matroska_track)
492 };
493 
495  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
496  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
497  { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
498  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
499  CHILD_OF(matroska_track)
500 };
501 
505  CHILD_OF(matroska_track_encoding)
506 };
507 
512  { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
513  { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
514  { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
515  { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
516  CHILD_OF(matroska_track_encoding)
517 };
518 static EbmlSyntax matroska_track_encoding[] = {
519  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
520  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
521  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
522  { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
524  CHILD_OF(matroska_track_encodings)
525 };
526 
527 static EbmlSyntax matroska_track_encodings[] = {
528  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
529  CHILD_OF(matroska_track)
530 };
531 
535  CHILD_OF(matroska_track_combine_planes)
536 };
537 
538 static EbmlSyntax matroska_track_combine_planes[] = {
539  { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
540  CHILD_OF(matroska_track_operation)
541 };
542 
543 static EbmlSyntax matroska_track_operation[] = {
544  { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
545  CHILD_OF(matroska_track)
546 };
547 
548 static EbmlSyntax matroska_track[] = {
549  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
551  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
554  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
555  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
556  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
557  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
558  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
559  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
560  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
561  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
562  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
563  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
564  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
565  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
566  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
568  { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
569  { MATROSKA_ID_CODECNAME, EBML_NONE },
570  { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
571  { MATROSKA_ID_CODECINFOURL, EBML_NONE },
572  { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
573  { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
574  { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
575  CHILD_OF(matroska_tracks)
576 };
577 
578 static EbmlSyntax matroska_tracks[] = {
579  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
580  CHILD_OF(matroska_segment)
581 };
582 
585  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
586  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
587  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
589  CHILD_OF(matroska_attachments)
590 };
591 
592 static EbmlSyntax matroska_attachments[] = {
593  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
594  CHILD_OF(matroska_segment)
595 };
596 
598  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
600  { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
601  CHILD_OF(matroska_chapter_entry)
602 };
603 
604 static EbmlSyntax matroska_chapter_entry[] = {
608  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
610  { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
611  { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
612  { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
613  CHILD_OF(matroska_chapter)
614 };
615 
616 static EbmlSyntax matroska_chapter[] = {
617  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
619  { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
620  { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
621  { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
622  CHILD_OF(matroska_chapters)
623 };
624 
625 static EbmlSyntax matroska_chapters[] = {
626  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
627  CHILD_OF(matroska_segment)
628 };
629 
631  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
634  { MATROSKA_ID_CUEDURATION, EBML_NONE },
635  { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
636  CHILD_OF(matroska_index_entry)
637 };
638 
639 static EbmlSyntax matroska_index_entry[] = {
640  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
641  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
642  CHILD_OF(matroska_index)
643 };
644 
645 static EbmlSyntax matroska_index[] = {
646  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
647  CHILD_OF(matroska_segment)
648 };
649 
651  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
652  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
653  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
654  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
656  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
657  CHILD_OF(matroska_tag)
658 };
659 
662  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
663  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
664  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
665  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
666  CHILD_OF(matroska_tag)
667 };
668 
669 static EbmlSyntax matroska_tag[] = {
670  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
671  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
672  CHILD_OF(matroska_tags)
673 };
674 
675 static EbmlSyntax matroska_tags[] = {
676  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
677  CHILD_OF(matroska_segment)
678 };
679 
681  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
682  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
683  CHILD_OF(matroska_seekhead)
684 };
685 
686 static EbmlSyntax matroska_seekhead[] = {
687  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
688  CHILD_OF(matroska_segment)
689 };
690 
691 static EbmlSyntax matroska_segment[] = {
693  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
694  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
695  { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
696  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
697  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
698  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
699  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
700  { 0 } /* We don't want to go back to level 0, so don't add the parent. */
701 };
702 
704  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
705  { 0 }
706 };
707 
709  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
710  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
711  CHILD_OF(matroska_blockadditions)
712 };
713 
714 static EbmlSyntax matroska_blockadditions[] = {
715  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
716  CHILD_OF(matroska_blockgroup)
717 };
718 
719 static EbmlSyntax matroska_blockgroup[] = {
720  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
721  { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
723  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
724  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
726  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
727  CHILD_OF(matroska_cluster_parsing)
728 };
729 
730 // The following array contains SimpleBlock and BlockGroup twice
731 // in order to reuse the other values for matroska_cluster_enter.
732 static EbmlSyntax matroska_cluster_parsing[] = {
733  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
734  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, { .n = matroska_blockgroup } },
735  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
737  { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
739  { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
740  CHILD_OF(matroska_segment)
741 };
742 
744  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = &matroska_cluster_parsing[2] } },
745  { 0 }
746 };
747 #undef CHILD_OF
748 
749 static const char *const matroska_doctypes[] = { "matroska", "webm" };
750 
752 
753 /*
754  * This function prepares the status for parsing of level 1 elements.
755  */
757  uint32_t id, int64_t position)
758 {
759  if (position >= 0) {
760  int64_t err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
761  if (err < 0)
762  return err;
763  }
764 
765  matroska->current_id = id;
766  matroska->num_levels = 1;
767  matroska->unknown_count = 0;
768  matroska->resync_pos = avio_tell(matroska->ctx->pb);
769  if (id)
770  matroska->resync_pos -= (av_log2(id) + 7) / 8;
771 
772  return 0;
773 }
774 
775 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
776 {
777  AVIOContext *pb = matroska->ctx->pb;
778  uint32_t id;
779 
780  /* Try to seek to the last position to resync from. If this doesn't work,
781  * we resync from the earliest position available: The start of the buffer. */
782  if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
783  av_log(matroska->ctx, AV_LOG_WARNING,
784  "Seek to desired resync point failed. Seeking to "
785  "earliest point available instead.\n");
786  avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
787  last_pos + 1), SEEK_SET);
788  }
789 
790  id = avio_rb32(pb);
791 
792  // try to find a toplevel element
793  while (!avio_feof(pb)) {
794  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
795  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
797  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
798  /* Prepare the context for parsing of a level 1 element. */
799  matroska_reset_status(matroska, id, -1);
800  /* Given that we are here means that an error has occured,
801  * so treat the segment as unknown length in order not to
802  * discard valid data that happens to be beyond the designated
803  * end of the segment. */
804  matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
805  return 0;
806  }
807  id = (id << 8) | avio_r8(pb);
808  }
809 
810  matroska->done = 1;
811  return pb->error ? pb->error : AVERROR_EOF;
812 }
813 
814 /*
815  * Read: an "EBML number", which is defined as a variable-length
816  * array of bytes. The first byte indicates the length by giving a
817  * number of 0-bits followed by a one. The position of the first
818  * "one" bit inside the first byte indicates the length of this
819  * number.
820  * Returns: number of bytes read, < 0 on error
821  */
823  int max_size, uint64_t *number, int eof_forbidden)
824 {
825  int read, n = 1;
826  uint64_t total;
827  int64_t pos;
828 
829  /* The first byte tells us the length in bytes - except when it is zero. */
830  total = avio_r8(pb);
831  if (pb->eof_reached)
832  goto err;
833 
834  /* get the length of the EBML number */
835  read = 8 - ff_log2_tab[total];
836 
837  if (!total || read > max_size) {
838  pos = avio_tell(pb) - 1;
839  if (!total) {
840  av_log(matroska->ctx, AV_LOG_ERROR,
841  "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
842  "of an EBML number\n", pos, pos);
843  } else {
844  av_log(matroska->ctx, AV_LOG_ERROR,
845  "Length %d indicated by an EBML number's first byte 0x%02x "
846  "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
847  read, (uint8_t) total, pos, pos, max_size);
848  }
849  return AVERROR_INVALIDDATA;
850  }
851 
852  /* read out length */
853  total ^= 1 << ff_log2_tab[total];
854  while (n++ < read)
855  total = (total << 8) | avio_r8(pb);
856 
857  if (pb->eof_reached) {
858  eof_forbidden = 1;
859  goto err;
860  }
861 
862  *number = total;
863 
864  return read;
865 
866 err:
867  pos = avio_tell(pb);
868  if (pb->error) {
869  av_log(matroska->ctx, AV_LOG_ERROR,
870  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
871  pos, pos);
872  return pb->error;
873  }
874  if (eof_forbidden) {
875  av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
876  "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
877  return AVERROR(EIO);
878  }
879  return AVERROR_EOF;
880 }
881 
882 /**
883  * Read a EBML length value.
884  * This needs special handling for the "unknown length" case which has multiple
885  * encodings.
886  */
888  uint64_t *number)
889 {
890  int res = ebml_read_num(matroska, pb, 8, number, 1);
891  if (res > 0 && *number + 1 == 1ULL << (7 * res))
892  *number = EBML_UNKNOWN_LENGTH;
893  return res;
894 }
895 
896 /*
897  * Read the next element as an unsigned int.
898  * Returns NEEDS_CHECKING.
899  */
900 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
901 {
902  int n = 0;
903 
904  /* big-endian ordering; build up number */
905  *num = 0;
906  while (n++ < size)
907  *num = (*num << 8) | avio_r8(pb);
908 
909  return NEEDS_CHECKING;
910 }
911 
912 /*
913  * Read the next element as a signed int.
914  * Returns NEEDS_CHECKING.
915  */
916 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
917 {
918  int n = 1;
919 
920  if (size == 0) {
921  *num = 0;
922  } else {
923  *num = sign_extend(avio_r8(pb), 8);
924 
925  /* big-endian ordering; build up number */
926  while (n++ < size)
927  *num = ((uint64_t)*num << 8) | avio_r8(pb);
928  }
929 
930  return NEEDS_CHECKING;
931 }
932 
933 /*
934  * Read the next element as a float.
935  * Returns NEEDS_CHECKING or < 0 on obvious failure.
936  */
937 static int ebml_read_float(AVIOContext *pb, int size, double *num)
938 {
939  if (size == 0)
940  *num = 0;
941  else if (size == 4)
942  *num = av_int2float(avio_rb32(pb));
943  else if (size == 8)
944  *num = av_int2double(avio_rb64(pb));
945  else
946  return AVERROR_INVALIDDATA;
947 
948  return NEEDS_CHECKING;
949 }
950 
951 /*
952  * Read the next element as an ASCII string.
953  * 0 is success, < 0 or NEEDS_CHECKING is failure.
954  */
955 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
956 {
957  char *res;
958  int ret;
959 
960  /* EBML strings are usually not 0-terminated, so we allocate one
961  * byte more, read the string and NULL-terminate it ourselves. */
962  if (!(res = av_malloc(size + 1)))
963  return AVERROR(ENOMEM);
964  if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
965  av_free(res);
966  return ret < 0 ? ret : NEEDS_CHECKING;
967  }
968  (res)[size] = '\0';
969  av_free(*str);
970  *str = res;
971 
972  return 0;
973 }
974 
975 /*
976  * Read the next element as binary data.
977  * 0 is success, < 0 or NEEDS_CHECKING is failure.
978  */
979 static int ebml_read_binary(AVIOContext *pb, int length,
980  int64_t pos, EbmlBin *bin)
981 {
982  int ret;
983 
984  ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
985  if (ret < 0)
986  return ret;
987  memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
988 
989  bin->data = bin->buf->data;
990  bin->size = length;
991  bin->pos = pos;
992  if ((ret = avio_read(pb, bin->data, length)) != length) {
993  av_buffer_unref(&bin->buf);
994  bin->data = NULL;
995  bin->size = 0;
996  return ret < 0 ? ret : NEEDS_CHECKING;
997  }
998 
999  return 0;
1000 }
1001 
1002 /*
1003  * Read the next element, but only the header. The contents
1004  * are supposed to be sub-elements which can be read separately.
1005  * 0 is success, < 0 is failure.
1006  */
1008  uint64_t length, int64_t pos)
1009 {
1011 
1012  if (matroska->num_levels >= EBML_MAX_DEPTH) {
1013  av_log(matroska->ctx, AV_LOG_ERROR,
1014  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1015  return AVERROR(ENOSYS);
1016  }
1017 
1018  level = &matroska->levels[matroska->num_levels++];
1019  level->start = pos;
1020  level->length = length;
1021 
1022  return 0;
1023 }
1024 
1025 /*
1026  * Read signed/unsigned "EBML" numbers.
1027  * Return: number of bytes processed, < 0 on error
1028  */
1030  uint8_t *data, uint32_t size, uint64_t *num)
1031 {
1032  AVIOContext pb;
1033  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1034  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1035 }
1036 
1037 /*
1038  * Same as above, but signed.
1039  */
1041  uint8_t *data, uint32_t size, int64_t *num)
1042 {
1043  uint64_t unum;
1044  int res;
1045 
1046  /* read as unsigned number first */
1047  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1048  return res;
1049 
1050  /* make signed (weird way) */
1051  *num = unum - ((1LL << (7 * res - 1)) - 1);
1052 
1053  return res;
1054 }
1055 
1056 static int ebml_parse(MatroskaDemuxContext *matroska,
1057  EbmlSyntax *syntax, void *data);
1058 
1059 static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1060 {
1061  int i;
1062 
1063  // Whoever touches this should be aware of the duplication
1064  // existing in matroska_cluster_parsing.
1065  for (i = 0; syntax[i].id; i++)
1066  if (id == syntax[i].id)
1067  break;
1068 
1069  return &syntax[i];
1070 }
1071 
1072 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1073  void *data)
1074 {
1075  int res;
1076 
1077  if (data) {
1078  for (int i = 0; syntax[i].id; i++)
1079  switch (syntax[i].type) {
1080  case EBML_UINT:
1081  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1082  break;
1083  case EBML_SINT:
1084  *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1085  break;
1086  case EBML_FLOAT:
1087  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1088  break;
1089  case EBML_STR:
1090  case EBML_UTF8:
1091  // the default may be NULL
1092  if (syntax[i].def.s) {
1093  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1094  *dst = av_strdup(syntax[i].def.s);
1095  if (!*dst)
1096  return AVERROR(ENOMEM);
1097  }
1098  break;
1099  }
1100 
1101  if (!matroska->levels[matroska->num_levels - 1].length) {
1102  matroska->num_levels--;
1103  return 0;
1104  }
1105  }
1106 
1107  do {
1108  res = ebml_parse(matroska, syntax, data);
1109  } while (!res);
1110 
1111  return res == LEVEL_ENDED ? 0 : res;
1112 }
1113 
1114 static int is_ebml_id_valid(uint32_t id)
1115 {
1116  // Due to endian nonsense in Matroska, the highest byte with any bits set
1117  // will contain the leading length bit. This bit in turn identifies the
1118  // total byte length of the element by its position within the byte.
1119  unsigned int bits = av_log2(id);
1120  return id && (bits + 7) / 8 == (8 - bits % 8);
1121 }
1122 
1123 /*
1124  * Allocate and return the entry for the level1 element with the given ID. If
1125  * an entry already exists, return the existing entry.
1126  */
1128  uint32_t id)
1129 {
1130  int i;
1131  MatroskaLevel1Element *elem;
1132 
1133  if (!is_ebml_id_valid(id))
1134  return NULL;
1135 
1136  // Some files link to all clusters; useless.
1137  if (id == MATROSKA_ID_CLUSTER)
1138  return NULL;
1139 
1140  // There can be multiple seekheads.
1141  if (id != MATROSKA_ID_SEEKHEAD) {
1142  for (i = 0; i < matroska->num_level1_elems; i++) {
1143  if (matroska->level1_elems[i].id == id)
1144  return &matroska->level1_elems[i];
1145  }
1146  }
1147 
1148  // Only a completely broken file would have more elements.
1149  // It also provides a low-effort way to escape from circular seekheads
1150  // (every iteration will add a level1 entry).
1151  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1152  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1153  return NULL;
1154  }
1155 
1156  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1157  *elem = (MatroskaLevel1Element){.id = id};
1158 
1159  return elem;
1160 }
1161 
1162 static int ebml_parse(MatroskaDemuxContext *matroska,
1163  EbmlSyntax *syntax, void *data)
1164 {
1165  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1166  // Forbid unknown-length EBML_NONE elements.
1168  [EBML_UINT] = 8,
1169  [EBML_SINT] = 8,
1170  [EBML_FLOAT] = 8,
1171  // max. 16 MB for strings
1172  [EBML_STR] = 0x1000000,
1173  [EBML_UTF8] = 0x1000000,
1174  // max. 256 MB for binary data
1175  [EBML_BIN] = 0x10000000,
1176  // no limits for anything else
1177  };
1178  AVIOContext *pb = matroska->ctx->pb;
1179  uint32_t id;
1180  uint64_t length;
1181  int64_t pos = avio_tell(pb), pos_alt;
1182  int res, update_pos = 1, level_check;
1183  MatroskaLevel1Element *level1_elem;
1184  MatroskaLevel *level = matroska->num_levels ? &matroska->levels[matroska->num_levels - 1] : NULL;
1185 
1186  if (!matroska->current_id) {
1187  uint64_t id;
1188  res = ebml_read_num(matroska, pb, 4, &id, 0);
1189  if (res < 0) {
1190  if (pb->eof_reached && res == AVERROR_EOF) {
1191  if (matroska->is_live)
1192  // in live mode, finish parsing if EOF is reached.
1193  return 1;
1194  if (level && pos == avio_tell(pb)) {
1195  if (level->length == EBML_UNKNOWN_LENGTH) {
1196  // Unknown-length levels automatically end at EOF.
1197  matroska->num_levels--;
1198  return LEVEL_ENDED;
1199  } else {
1200  av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
1201  "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
1202  }
1203  }
1204  }
1205  return res;
1206  }
1207  matroska->current_id = id | 1 << 7 * res;
1208  pos_alt = pos + res;
1209  } else {
1210  pos_alt = pos;
1211  pos -= (av_log2(matroska->current_id) + 7) / 8;
1212  }
1213 
1214  id = matroska->current_id;
1215 
1216  syntax = ebml_parse_id(syntax, id);
1217  if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1218  if (level && level->length == EBML_UNKNOWN_LENGTH) {
1219  // Unknown-length levels end when an element from an upper level
1220  // in the hierarchy is encountered.
1221  while (syntax->def.n) {
1222  syntax = ebml_parse_id(syntax->def.n, id);
1223  if (syntax->id) {
1224  matroska->num_levels--;
1225  return LEVEL_ENDED;
1226  }
1227  };
1228  }
1229 
1230  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32" at pos. "
1231  "%"PRId64"\n", id, pos);
1232  update_pos = 0; /* Don't update resync_pos as an error might have happened. */
1233  }
1234 
1235  if (data) {
1236  data = (char *) data + syntax->data_offset;
1237  if (syntax->list_elem_size) {
1238  EbmlList *list = data;
1239  void *newelem = av_realloc_array(list->elem, list->nb_elem + 1,
1240  syntax->list_elem_size);
1241  if (!newelem)
1242  return AVERROR(ENOMEM);
1243  list->elem = newelem;
1244  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1245  memset(data, 0, syntax->list_elem_size);
1246  list->nb_elem++;
1247  }
1248  }
1249 
1250  if (syntax->type != EBML_STOP) {
1251  matroska->current_id = 0;
1252  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1253  return res;
1254 
1255  pos_alt += res;
1256 
1257  if (matroska->num_levels > 0) {
1258  if (length != EBML_UNKNOWN_LENGTH &&
1259  level->length != EBML_UNKNOWN_LENGTH) {
1260  uint64_t elem_end = pos_alt + length,
1261  level_end = level->start + level->length;
1262 
1263  if (elem_end < level_end) {
1264  level_check = 0;
1265  } else if (elem_end == level_end) {
1266  level_check = LEVEL_ENDED;
1267  } else {
1268  av_log(matroska->ctx, AV_LOG_ERROR,
1269  "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1270  "containing master element ending at 0x%"PRIx64"\n",
1271  pos, elem_end, level_end);
1272  return AVERROR_INVALIDDATA;
1273  }
1274  } else if (length != EBML_UNKNOWN_LENGTH) {
1275  level_check = 0;
1276  } else if (level->length != EBML_UNKNOWN_LENGTH) {
1277  av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1278  "at 0x%"PRIx64" inside parent with finite size\n", pos);
1279  return AVERROR_INVALIDDATA;
1280  } else {
1281  level_check = 0;
1282  if (id != MATROSKA_ID_CLUSTER && (syntax->type == EBML_LEVEL1
1283  || syntax->type == EBML_NEST)) {
1284  // According to the current specifications only clusters and
1285  // segments are allowed to be unknown-length. We also accept
1286  // other unknown-length master elements.
1287  av_log(matroska->ctx, AV_LOG_WARNING,
1288  "Found unknown-length element 0x%"PRIX32" other than "
1289  "a cluster at 0x%"PRIx64". Spec-incompliant, but "
1290  "parsing will nevertheless be attempted.\n", id, pos);
1291  update_pos = -1;
1292  }
1293  }
1294  } else
1295  level_check = 0;
1296 
1297  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1298  if (length != EBML_UNKNOWN_LENGTH) {
1299  av_log(matroska->ctx, AV_LOG_ERROR,
1300  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for element "
1301  "with ID 0x%"PRIX32" at 0x%"PRIx64"\n",
1302  length, max_lengths[syntax->type], id, pos);
1303  } else if (syntax->type != EBML_NONE) {
1304  av_log(matroska->ctx, AV_LOG_ERROR,
1305  "Element with ID 0x%"PRIX32" at pos. 0x%"PRIx64" has "
1306  "unknown length, yet the length of an element of its "
1307  "type must be known.\n", id, pos);
1308  } else {
1309  av_log(matroska->ctx, AV_LOG_ERROR,
1310  "Found unknown-length element with ID 0x%"PRIX32" at "
1311  "pos. 0x%"PRIx64" for which no syntax for parsing is "
1312  "available.\n", id, pos);
1313  }
1314  return AVERROR_INVALIDDATA;
1315  }
1316 
1317  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1318  // Loosing sync will likely manifest itself as encountering unknown
1319  // elements which are not reliably distinguishable from elements
1320  // belonging to future extensions of the format.
1321  // We use a heuristic to detect such situations: If the current
1322  // element is not expected at the current syntax level and there
1323  // were only a few unknown elements in a row, then the element is
1324  // skipped or considered defective based upon the length of the
1325  // current element (i.e. how much would be skipped); if there were
1326  // more than a few skipped elements in a row and skipping the current
1327  // element would lead us more than SKIP_THRESHOLD away from the last
1328  // known good position, then it is inferred that an error occured.
1329  // The dependency on the number of unknown elements in a row exists
1330  // because the distance to the last known good position is
1331  // automatically big if the last parsed element was big.
1332  // In both cases, each unknown element is considered equivalent to
1333  // UNKNOWN_EQUIV of skipped bytes for the check.
1334  // The whole check is only done for non-seekable output, because
1335  // in this situation skipped data can't simply be rechecked later.
1336  // This is especially important when using unkown length elements
1337  // as the check for whether a child exceeds its containing master
1338  // element is not effective in this situation.
1339  if (update_pos) {
1340  matroska->unknown_count = 0;
1341  } else {
1342  int64_t dist = length + UNKNOWN_EQUIV * matroska->unknown_count++;
1343 
1344  if (matroska->unknown_count > 3)
1345  dist += pos_alt - matroska->resync_pos;
1346 
1347  if (dist > SKIP_THRESHOLD) {
1348  av_log(matroska->ctx, AV_LOG_ERROR,
1349  "Unknown element %"PRIX32" at pos. 0x%"PRIx64" with "
1350  "length 0x%"PRIx64" considered as invalid data. Last "
1351  "known good position 0x%"PRIx64", %d unknown elements"
1352  " in a row\n", id, pos, length, matroska->resync_pos,
1353  matroska->unknown_count);
1354  return AVERROR_INVALIDDATA;
1355  }
1356  }
1357  }
1358 
1359  if (update_pos > 0) {
1360  // We have found an element that is allowed at this place
1361  // in the hierarchy and it passed all checks, so treat the beginning
1362  // of the element as the "last known good" position.
1363  matroska->resync_pos = pos;
1364  }
1365 
1366  if (!data && length != EBML_UNKNOWN_LENGTH)
1367  goto skip;
1368  }
1369 
1370  switch (syntax->type) {
1371  case EBML_UINT:
1372  res = ebml_read_uint(pb, length, data);
1373  break;
1374  case EBML_SINT:
1375  res = ebml_read_sint(pb, length, data);
1376  break;
1377  case EBML_FLOAT:
1378  res = ebml_read_float(pb, length, data);
1379  break;
1380  case EBML_STR:
1381  case EBML_UTF8:
1382  res = ebml_read_ascii(pb, length, data);
1383  break;
1384  case EBML_BIN:
1385  res = ebml_read_binary(pb, length, pos_alt, data);
1386  break;
1387  case EBML_LEVEL1:
1388  case EBML_NEST:
1389  if ((res = ebml_read_master(matroska, length, pos_alt)) < 0)
1390  return res;
1391  if (id == MATROSKA_ID_SEGMENT)
1392  matroska->segment_start = pos_alt;
1393  if (id == MATROSKA_ID_CUES)
1394  matroska->cues_parsing_deferred = 0;
1395  if (syntax->type == EBML_LEVEL1 &&
1396  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1397  if (!level1_elem->pos) {
1398  // Zero is not a valid position for a level 1 element.
1399  level1_elem->pos = pos;
1400  } else if (level1_elem->pos != pos)
1401  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1402  level1_elem->parsed = 1;
1403  }
1404  if (res = ebml_parse_nest(matroska, syntax->def.n, data))
1405  return res;
1406  break;
1407  case EBML_STOP:
1408  return 1;
1409  skip:
1410  default:
1411  if (length) {
1412  int64_t res2;
1413  if (ffio_limit(pb, length) != length) {
1414  // ffio_limit emits its own error message,
1415  // so we don't have to.
1416  return AVERROR(EIO);
1417  }
1418  if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1419  // avio_skip might take us past EOF. We check for this
1420  // by skipping only length - 1 bytes, reading a byte and
1421  // checking the error flags. This is done in order to check
1422  // that the element has been properly skipped even when
1423  // no filesize (that ffio_limit relies on) is available.
1424  avio_r8(pb);
1425  res = NEEDS_CHECKING;
1426  } else
1427  res = res2;
1428  } else
1429  res = 0;
1430  }
1431  if (res) {
1432  if (res == NEEDS_CHECKING) {
1433  if (pb->eof_reached) {
1434  if (pb->error)
1435  res = pb->error;
1436  else
1437  res = AVERROR_EOF;
1438  } else
1439  goto level_check;
1440  }
1441 
1442  if (res == AVERROR_INVALIDDATA)
1443  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1444  else if (res == AVERROR(EIO))
1445  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1446  else if (res == AVERROR_EOF) {
1447  av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1448  res = AVERROR(EIO);
1449  }
1450 
1451  return res;
1452  }
1453 
1454 level_check:
1455  if (level_check == LEVEL_ENDED && matroska->num_levels) {
1456  level = &matroska->levels[matroska->num_levels - 1];
1457  pos = avio_tell(pb);
1458 
1459  // Given that pos >= level->start no check for
1460  // level->length != EBML_UNKNOWN_LENGTH is necessary.
1461  while (matroska->num_levels && pos == level->start + level->length) {
1462  matroska->num_levels--;
1463  level--;
1464  }
1465  }
1466 
1467  return level_check;
1468 }
1469 
1470 static void ebml_free(EbmlSyntax *syntax, void *data)
1471 {
1472  int i, j;
1473  for (i = 0; syntax[i].id; i++) {
1474  void *data_off = (char *) data + syntax[i].data_offset;
1475  switch (syntax[i].type) {
1476  case EBML_STR:
1477  case EBML_UTF8:
1478  av_freep(data_off);
1479  break;
1480  case EBML_BIN:
1481  av_buffer_unref(&((EbmlBin *) data_off)->buf);
1482  break;
1483  case EBML_LEVEL1:
1484  case EBML_NEST:
1485  if (syntax[i].list_elem_size) {
1486  EbmlList *list = data_off;
1487  char *ptr = list->elem;
1488  for (j = 0; j < list->nb_elem;
1489  j++, ptr += syntax[i].list_elem_size)
1490  ebml_free(syntax[i].def.n, ptr);
1491  av_freep(&list->elem);
1492  list->nb_elem = 0;
1493  } else
1494  ebml_free(syntax[i].def.n, data_off);
1495  default:
1496  break;
1497  }
1498  }
1499 }
1500 
1501 /*
1502  * Autodetecting...
1503  */
1504 static int matroska_probe(const AVProbeData *p)
1505 {
1506  uint64_t total = 0;
1507  int len_mask = 0x80, size = 1, n = 1, i;
1508 
1509  /* EBML header? */
1510  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1511  return 0;
1512 
1513  /* length of header */
1514  total = p->buf[4];
1515  while (size <= 8 && !(total & len_mask)) {
1516  size++;
1517  len_mask >>= 1;
1518  }
1519  if (size > 8)
1520  return 0;
1521  total &= (len_mask - 1);
1522  while (n < size)
1523  total = (total << 8) | p->buf[4 + n++];
1524 
1525  if (total + 1 == 1ULL << (7 * size)){
1526  /* Unknown-length header - simply parse the whole buffer. */
1527  total = p->buf_size - 4 - size;
1528  } else {
1529  /* Does the probe data contain the whole header? */
1530  if (p->buf_size < 4 + size + total)
1531  return 0;
1532  }
1533 
1534  /* The header should contain a known document type. For now,
1535  * we don't parse the whole header but simply check for the
1536  * availability of that array of characters inside the header.
1537  * Not fully fool-proof, but good enough. */
1538  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1539  size_t probelen = strlen(matroska_doctypes[i]);
1540  if (total < probelen)
1541  continue;
1542  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1543  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1544  return AVPROBE_SCORE_MAX;
1545  }
1546 
1547  // probably valid EBML header but no recognized doctype
1548  return AVPROBE_SCORE_EXTENSION;
1549 }
1550 
1552  int num)
1553 {
1554  MatroskaTrack *tracks = matroska->tracks.elem;
1555  int i;
1556 
1557  for (i = 0; i < matroska->tracks.nb_elem; i++)
1558  if (tracks[i].num == num)
1559  return &tracks[i];
1560 
1561  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1562  return NULL;
1563 }
1564 
1565 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1566  MatroskaTrack *track)
1567 {
1568  MatroskaTrackEncoding *encodings = track->encodings.elem;
1569  uint8_t *data = *buf;
1570  int isize = *buf_size;
1571  uint8_t *pkt_data = NULL;
1572  uint8_t av_unused *newpktdata;
1573  int pkt_size = isize;
1574  int result = 0;
1575  int olen;
1576 
1577  if (pkt_size >= 10000000U)
1578  return AVERROR_INVALIDDATA;
1579 
1580  switch (encodings[0].compression.algo) {
1582  {
1583  int header_size = encodings[0].compression.settings.size;
1584  uint8_t *header = encodings[0].compression.settings.data;
1585 
1586  if (header_size && !header) {
1587  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1588  return -1;
1589  }
1590 
1591  if (!header_size)
1592  return 0;
1593 
1594  pkt_size = isize + header_size;
1595  pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1596  if (!pkt_data)
1597  return AVERROR(ENOMEM);
1598 
1599  memcpy(pkt_data, header, header_size);
1600  memcpy(pkt_data + header_size, data, isize);
1601  break;
1602  }
1603 #if CONFIG_LZO
1605  do {
1606  olen = pkt_size *= 3;
1607  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1609  if (!newpktdata) {
1610  result = AVERROR(ENOMEM);
1611  goto failed;
1612  }
1613  pkt_data = newpktdata;
1614  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1615  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1616  if (result) {
1617  result = AVERROR_INVALIDDATA;
1618  goto failed;
1619  }
1620  pkt_size -= olen;
1621  break;
1622 #endif
1623 #if CONFIG_ZLIB
1625  {
1626  z_stream zstream = { 0 };
1627  if (inflateInit(&zstream) != Z_OK)
1628  return -1;
1629  zstream.next_in = data;
1630  zstream.avail_in = isize;
1631  do {
1632  pkt_size *= 3;
1633  newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1634  if (!newpktdata) {
1635  inflateEnd(&zstream);
1636  result = AVERROR(ENOMEM);
1637  goto failed;
1638  }
1639  pkt_data = newpktdata;
1640  zstream.avail_out = pkt_size - zstream.total_out;
1641  zstream.next_out = pkt_data + zstream.total_out;
1642  result = inflate(&zstream, Z_NO_FLUSH);
1643  } while (result == Z_OK && pkt_size < 10000000);
1644  pkt_size = zstream.total_out;
1645  inflateEnd(&zstream);
1646  if (result != Z_STREAM_END) {
1647  if (result == Z_MEM_ERROR)
1648  result = AVERROR(ENOMEM);
1649  else
1650  result = AVERROR_INVALIDDATA;
1651  goto failed;
1652  }
1653  break;
1654  }
1655 #endif
1656 #if CONFIG_BZLIB
1658  {
1659  bz_stream bzstream = { 0 };
1660  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1661  return -1;
1662  bzstream.next_in = data;
1663  bzstream.avail_in = isize;
1664  do {
1665  pkt_size *= 3;
1666  newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1667  if (!newpktdata) {
1668  BZ2_bzDecompressEnd(&bzstream);
1669  result = AVERROR(ENOMEM);
1670  goto failed;
1671  }
1672  pkt_data = newpktdata;
1673  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1674  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1675  result = BZ2_bzDecompress(&bzstream);
1676  } while (result == BZ_OK && pkt_size < 10000000);
1677  pkt_size = bzstream.total_out_lo32;
1678  BZ2_bzDecompressEnd(&bzstream);
1679  if (result != BZ_STREAM_END) {
1680  if (result == BZ_MEM_ERROR)
1681  result = AVERROR(ENOMEM);
1682  else
1683  result = AVERROR_INVALIDDATA;
1684  goto failed;
1685  }
1686  break;
1687  }
1688 #endif
1689  default:
1690  return AVERROR_INVALIDDATA;
1691  }
1692 
1693  memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1694 
1695  *buf = pkt_data;
1696  *buf_size = pkt_size;
1697  return 0;
1698 
1699 failed:
1700  av_free(pkt_data);
1701  return result;
1702 }
1703 
1705  AVDictionary **metadata, char *prefix)
1706 {
1707  MatroskaTag *tags = list->elem;
1708  char key[1024];
1709  int i;
1710 
1711  for (i = 0; i < list->nb_elem; i++) {
1712  const char *lang = tags[i].lang &&
1713  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1714 
1715  if (!tags[i].name) {
1716  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1717  continue;
1718  }
1719  if (prefix)
1720  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1721  else
1722  av_strlcpy(key, tags[i].name, sizeof(key));
1723  if (tags[i].def || !lang) {
1724  av_dict_set(metadata, key, tags[i].string, 0);
1725  if (tags[i].sub.nb_elem)
1726  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1727  }
1728  if (lang) {
1729  av_strlcat(key, "-", sizeof(key));
1730  av_strlcat(key, lang, sizeof(key));
1731  av_dict_set(metadata, key, tags[i].string, 0);
1732  if (tags[i].sub.nb_elem)
1733  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1734  }
1735  }
1737 }
1738 
1740 {
1741  MatroskaDemuxContext *matroska = s->priv_data;
1742  MatroskaTags *tags = matroska->tags.elem;
1743  int i, j;
1744 
1745  for (i = 0; i < matroska->tags.nb_elem; i++) {
1746  if (tags[i].target.attachuid) {
1747  MatroskaAttachment *attachment = matroska->attachments.elem;
1748  int found = 0;
1749  for (j = 0; j < matroska->attachments.nb_elem; j++) {
1750  if (attachment[j].uid == tags[i].target.attachuid &&
1751  attachment[j].stream) {
1752  matroska_convert_tag(s, &tags[i].tag,
1753  &attachment[j].stream->metadata, NULL);
1754  found = 1;
1755  }
1756  }
1757  if (!found) {
1759  "The tags at index %d refer to a "
1760  "non-existent attachment %"PRId64".\n",
1761  i, tags[i].target.attachuid);
1762  }
1763  } else if (tags[i].target.chapteruid) {
1764  MatroskaChapter *chapter = matroska->chapters.elem;
1765  int found = 0;
1766  for (j = 0; j < matroska->chapters.nb_elem; j++) {
1767  if (chapter[j].uid == tags[i].target.chapteruid &&
1768  chapter[j].chapter) {
1769  matroska_convert_tag(s, &tags[i].tag,
1770  &chapter[j].chapter->metadata, NULL);
1771  found = 1;
1772  }
1773  }
1774  if (!found) {
1776  "The tags at index %d refer to a non-existent chapter "
1777  "%"PRId64".\n",
1778  i, tags[i].target.chapteruid);
1779  }
1780  } else if (tags[i].target.trackuid) {
1781  MatroskaTrack *track = matroska->tracks.elem;
1782  int found = 0;
1783  for (j = 0; j < matroska->tracks.nb_elem; j++) {
1784  if (track[j].uid == tags[i].target.trackuid &&
1785  track[j].stream) {
1786  matroska_convert_tag(s, &tags[i].tag,
1787  &track[j].stream->metadata, NULL);
1788  found = 1;
1789  }
1790  }
1791  if (!found) {
1793  "The tags at index %d refer to a non-existent track "
1794  "%"PRId64".\n",
1795  i, tags[i].target.trackuid);
1796  }
1797  } else {
1798  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1799  tags[i].target.type);
1800  }
1801  }
1802 }
1803 
1805  int64_t pos)
1806 {
1807  uint32_t saved_id = matroska->current_id;
1808  int64_t before_pos = avio_tell(matroska->ctx->pb);
1809  int ret = 0;
1810 
1811  /* seek */
1812  if (avio_seek(matroska->ctx->pb, pos, SEEK_SET) == pos) {
1813  /* We don't want to lose our seekhead level, so we add
1814  * a dummy. This is a crude hack. */
1815  if (matroska->num_levels == EBML_MAX_DEPTH) {
1816  av_log(matroska->ctx, AV_LOG_INFO,
1817  "Max EBML element depth (%d) reached, "
1818  "cannot parse further.\n", EBML_MAX_DEPTH);
1819  ret = AVERROR_INVALIDDATA;
1820  } else {
1821  matroska->levels[matroska->num_levels] = (MatroskaLevel) { 0, EBML_UNKNOWN_LENGTH };
1822  matroska->num_levels++;
1823  matroska->current_id = 0;
1824 
1825  ret = ebml_parse(matroska, matroska_segment, matroska);
1826  if (ret == LEVEL_ENDED) {
1827  /* This can only happen if the seek brought us beyond EOF. */
1828  ret = AVERROR_EOF;
1829  }
1830  }
1831  }
1832  /* Seek back - notice that in all instances where this is used
1833  * it is safe to set the level to 1. */
1834  matroska_reset_status(matroska, saved_id, before_pos);
1835 
1836  return ret;
1837 }
1838 
1840 {
1841  EbmlList *seekhead_list = &matroska->seekhead;
1842  int i;
1843 
1844  // we should not do any seeking in the streaming case
1845  if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1846  return;
1847 
1848  for (i = 0; i < seekhead_list->nb_elem; i++) {
1849  MatroskaSeekhead *seekheads = seekhead_list->elem;
1850  uint32_t id = seekheads[i].id;
1851  int64_t pos = seekheads[i].pos + matroska->segment_start;
1852 
1853  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1854  if (!elem || elem->parsed)
1855  continue;
1856 
1857  elem->pos = pos;
1858 
1859  // defer cues parsing until we actually need cue data.
1860  if (id == MATROSKA_ID_CUES)
1861  continue;
1862 
1863  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1864  // mark index as broken
1865  matroska->cues_parsing_deferred = -1;
1866  break;
1867  }
1868 
1869  elem->parsed = 1;
1870  }
1871 }
1872 
1874 {
1875  EbmlList *index_list;
1877  uint64_t index_scale = 1;
1878  int i, j;
1879 
1880  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1881  return;
1882 
1883  index_list = &matroska->index;
1884  index = index_list->elem;
1885  if (index_list->nb_elem < 2)
1886  return;
1887  if (index[1].time > 1E14 / matroska->time_scale) {
1888  av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1889  return;
1890  }
1891  for (i = 0; i < index_list->nb_elem; i++) {
1892  EbmlList *pos_list = &index[i].pos;
1893  MatroskaIndexPos *pos = pos_list->elem;
1894  for (j = 0; j < pos_list->nb_elem; j++) {
1895  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1896  pos[j].track);
1897  if (track && track->stream)
1898  av_add_index_entry(track->stream,
1899  pos[j].pos + matroska->segment_start,
1900  index[i].time / index_scale, 0, 0,
1902  }
1903  }
1904 }
1905 
1907  int i;
1908 
1909  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1910  return;
1911 
1912  for (i = 0; i < matroska->num_level1_elems; i++) {
1913  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1914  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1915  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1916  matroska->cues_parsing_deferred = -1;
1917  elem->parsed = 1;
1918  break;
1919  }
1920  }
1921 
1922  matroska_add_index_entries(matroska);
1923 }
1924 
1926 {
1927  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1928  int profile;
1929 
1930  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1931  if (strstr(codec_id, aac_profiles[profile]))
1932  break;
1933  return profile + 1;
1934 }
1935 
1936 static int matroska_aac_sri(int samplerate)
1937 {
1938  int sri;
1939 
1940  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1941  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1942  break;
1943  return sri;
1944 }
1945 
1946 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1947 {
1948  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1949  avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1950 }
1951 
1953  MatroskaTrack *track,
1954  int *offset)
1955 {
1956  AVStream *st = track->stream;
1957  uint8_t *p = track->codec_priv.data;
1958  int size = track->codec_priv.size;
1959 
1960  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1961  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1962  track->codec_priv.size = 0;
1963  return 0;
1964  }
1965  *offset = 8;
1966  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1967 
1968  p += track->codec_priv.size;
1969  size -= track->codec_priv.size;
1970 
1971  /* parse the remaining metadata blocks if present */
1972  while (size >= 4) {
1973  int block_last, block_type, block_size;
1974 
1975  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1976 
1977  p += 4;
1978  size -= 4;
1979  if (block_size > size)
1980  return 0;
1981 
1982  /* check for the channel mask */
1983  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1984  AVDictionary *dict = NULL;
1985  AVDictionaryEntry *chmask;
1986 
1987  ff_vorbis_comment(s, &dict, p, block_size, 0);
1988  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1989  if (chmask) {
1990  uint64_t mask = strtol(chmask->value, NULL, 0);
1991  if (!mask || mask & ~0x3ffffULL) {
1993  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1994  } else
1995  st->codecpar->channel_layout = mask;
1996  }
1997  av_dict_free(&dict);
1998  }
1999 
2000  p += block_size;
2001  size -= block_size;
2002  }
2003 
2004  return 0;
2005 }
2006 
2007 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
2008 {
2009  int major, minor, micro, bttb = 0;
2010 
2011  /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
2012  * this function, and fixed in 57.52 */
2013  if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, &micro) == 3)
2014  bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
2015 
2016  switch (field_order) {
2018  return AV_FIELD_PROGRESSIVE;
2020  return AV_FIELD_UNKNOWN;
2022  return AV_FIELD_TT;
2024  return AV_FIELD_BB;
2026  return bttb ? AV_FIELD_TB : AV_FIELD_BT;
2028  return bttb ? AV_FIELD_BT : AV_FIELD_TB;
2029  default:
2030  return AV_FIELD_UNKNOWN;
2031  }
2032 }
2033 
2034 static void mkv_stereo_mode_display_mul(int stereo_mode,
2035  int *h_width, int *h_height)
2036 {
2037  switch (stereo_mode) {
2043  break;
2048  *h_width = 2;
2049  break;
2054  *h_height = 2;
2055  break;
2056  }
2057 }
2058 
2059 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
2060  const MatroskaTrackVideoColor *color = track->video.color.elem;
2061  const MatroskaMasteringMeta *mastering_meta;
2062  int has_mastering_primaries, has_mastering_luminance;
2063 
2064  if (!track->video.color.nb_elem)
2065  return 0;
2066 
2067  mastering_meta = &color->mastering_meta;
2068  // Mastering primaries are CIE 1931 coords, and must be > 0.
2069  has_mastering_primaries =
2070  mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
2071  mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
2072  mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
2073  mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
2074  has_mastering_luminance = mastering_meta->max_luminance > 0;
2075 
2078  if (color->primaries != AVCOL_PRI_RESERVED &&
2079  color->primaries != AVCOL_PRI_RESERVED0)
2080  st->codecpar->color_primaries = color->primaries;
2084  if (color->range != AVCOL_RANGE_UNSPECIFIED &&
2085  color->range <= AVCOL_RANGE_JPEG)
2086  st->codecpar->color_range = color->range;
2091  st->codecpar->chroma_location =
2093  (color->chroma_siting_vert - 1) << 7);
2094  }
2095  if (color->max_cll && color->max_fall) {
2096  size_t size = 0;
2097  int ret;
2099  if (!metadata)
2100  return AVERROR(ENOMEM);
2102  (uint8_t *)metadata, size);
2103  if (ret < 0) {
2104  av_freep(&metadata);
2105  return ret;
2106  }
2107  metadata->MaxCLL = color->max_cll;
2108  metadata->MaxFALL = color->max_fall;
2109  }
2110 
2111  if (has_mastering_primaries || has_mastering_luminance) {
2112  // Use similar rationals as other standards.
2113  const int chroma_den = 50000;
2114  const int luma_den = 10000;
2115  AVMasteringDisplayMetadata *metadata =
2118  sizeof(AVMasteringDisplayMetadata));
2119  if (!metadata) {
2120  return AVERROR(ENOMEM);
2121  }
2122  memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
2123  if (has_mastering_primaries) {
2124  metadata->display_primaries[0][0] = av_make_q(
2125  round(mastering_meta->r_x * chroma_den), chroma_den);
2126  metadata->display_primaries[0][1] = av_make_q(
2127  round(mastering_meta->r_y * chroma_den), chroma_den);
2128  metadata->display_primaries[1][0] = av_make_q(
2129  round(mastering_meta->g_x * chroma_den), chroma_den);
2130  metadata->display_primaries[1][1] = av_make_q(
2131  round(mastering_meta->g_y * chroma_den), chroma_den);
2132  metadata->display_primaries[2][0] = av_make_q(
2133  round(mastering_meta->b_x * chroma_den), chroma_den);
2134  metadata->display_primaries[2][1] = av_make_q(
2135  round(mastering_meta->b_y * chroma_den), chroma_den);
2136  metadata->white_point[0] = av_make_q(
2137  round(mastering_meta->white_x * chroma_den), chroma_den);
2138  metadata->white_point[1] = av_make_q(
2139  round(mastering_meta->white_y * chroma_den), chroma_den);
2140  metadata->has_primaries = 1;
2141  }
2142  if (has_mastering_luminance) {
2143  metadata->max_luminance = av_make_q(
2144  round(mastering_meta->max_luminance * luma_den), luma_den);
2145  metadata->min_luminance = av_make_q(
2146  round(mastering_meta->min_luminance * luma_den), luma_den);
2147  metadata->has_luminance = 1;
2148  }
2149  }
2150  return 0;
2151 }
2152 
2153 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
2154  AVSphericalMapping *spherical;
2155  enum AVSphericalProjection projection;
2156  size_t spherical_size;
2157  uint32_t l = 0, t = 0, r = 0, b = 0;
2158  uint32_t padding = 0;
2159  int ret;
2160  GetByteContext gb;
2161 
2163  track->video.projection.private.size);
2164 
2165  if (bytestream2_get_byte(&gb) != 0) {
2166  av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
2167  return 0;
2168  }
2169 
2170  bytestream2_skip(&gb, 3); // flags
2171 
2172  switch (track->video.projection.type) {
2174  if (track->video.projection.private.size == 20) {
2175  t = bytestream2_get_be32(&gb);
2176  b = bytestream2_get_be32(&gb);
2177  l = bytestream2_get_be32(&gb);
2178  r = bytestream2_get_be32(&gb);
2179 
2180  if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2182  "Invalid bounding rectangle coordinates "
2183  "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2184  l, t, r, b);
2185  return AVERROR_INVALIDDATA;
2186  }
2187  } else if (track->video.projection.private.size != 0) {
2188  av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2189  return AVERROR_INVALIDDATA;
2190  }
2191 
2192  if (l || t || r || b)
2193  projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2194  else
2195  projection = AV_SPHERICAL_EQUIRECTANGULAR;
2196  break;
2198  if (track->video.projection.private.size < 4) {
2199  av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2200  return AVERROR_INVALIDDATA;
2201  } else if (track->video.projection.private.size == 12) {
2202  uint32_t layout = bytestream2_get_be32(&gb);
2203  if (layout) {
2205  "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2206  return 0;
2207  }
2208  projection = AV_SPHERICAL_CUBEMAP;
2209  padding = bytestream2_get_be32(&gb);
2210  } else {
2211  av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2212  return AVERROR_INVALIDDATA;
2213  }
2214  break;
2216  /* No Spherical metadata */
2217  return 0;
2218  default:
2220  "Unknown spherical metadata type %"PRIu64"\n",
2221  track->video.projection.type);
2222  return 0;
2223  }
2224 
2225  spherical = av_spherical_alloc(&spherical_size);
2226  if (!spherical)
2227  return AVERROR(ENOMEM);
2228 
2229  spherical->projection = projection;
2230 
2231  spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2232  spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2233  spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2234 
2235  spherical->padding = padding;
2236 
2237  spherical->bound_left = l;
2238  spherical->bound_top = t;
2239  spherical->bound_right = r;
2240  spherical->bound_bottom = b;
2241 
2242  ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2243  spherical_size);
2244  if (ret < 0) {
2245  av_freep(&spherical);
2246  return ret;
2247  }
2248 
2249  return 0;
2250 }
2251 
2252 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2253 {
2254  const AVCodecTag *codec_tags;
2255 
2256  codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2258 
2259  /* Normalize noncompliant private data that starts with the fourcc
2260  * by expanding/shifting the data by 4 bytes and storing the data
2261  * size at the start. */
2262  if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2263  int ret = av_buffer_realloc(&track->codec_priv.buf,
2265  if (ret < 0)
2266  return ret;
2267 
2268  track->codec_priv.data = track->codec_priv.buf->data;
2269  memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2270  track->codec_priv.size += 4;
2271  AV_WB32(track->codec_priv.data, track->codec_priv.size);
2272  }
2273 
2274  *fourcc = AV_RL32(track->codec_priv.data + 4);
2275  *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2276 
2277  return 0;
2278 }
2279 
2281 {
2282  MatroskaDemuxContext *matroska = s->priv_data;
2283  MatroskaTrack *tracks = matroska->tracks.elem;
2284  AVStream *st;
2285  int i, j, ret;
2286  int k;
2287 
2288  for (i = 0; i < matroska->tracks.nb_elem; i++) {
2289  MatroskaTrack *track = &tracks[i];
2291  EbmlList *encodings_list = &track->encodings;
2292  MatroskaTrackEncoding *encodings = encodings_list->elem;
2293  uint8_t *extradata = NULL;
2294  int extradata_size = 0;
2295  int extradata_offset = 0;
2296  uint32_t fourcc = 0;
2297  AVIOContext b;
2298  char* key_id_base64 = NULL;
2299  int bit_depth = -1;
2300 
2301  /* Apply some sanity checks. */
2302  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2303  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2304  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2305  track->type != MATROSKA_TRACK_TYPE_METADATA) {
2306  av_log(matroska->ctx, AV_LOG_INFO,
2307  "Unknown or unsupported track type %"PRIu64"\n",
2308  track->type);
2309  continue;
2310  }
2311  if (!track->codec_id)
2312  continue;
2313 
2314  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2315  isnan(track->audio.samplerate)) {
2316  av_log(matroska->ctx, AV_LOG_WARNING,
2317  "Invalid sample rate %f, defaulting to 8000 instead.\n",
2318  track->audio.samplerate);
2319  track->audio.samplerate = 8000;
2320  }
2321 
2322  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2323  if (!track->default_duration && track->video.frame_rate > 0) {
2324  double default_duration = 1000000000 / track->video.frame_rate;
2325  if (default_duration > UINT64_MAX || default_duration < 0) {
2326  av_log(matroska->ctx, AV_LOG_WARNING,
2327  "Invalid frame rate %e. Cannot calculate default duration.\n",
2328  track->video.frame_rate);
2329  } else {
2330  track->default_duration = default_duration;
2331  }
2332  }
2333  if (track->video.display_width == -1)
2334  track->video.display_width = track->video.pixel_width;
2335  if (track->video.display_height == -1)
2336  track->video.display_height = track->video.pixel_height;
2337  if (track->video.color_space.size == 4)
2338  fourcc = AV_RL32(track->video.color_space.data);
2339  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2340  if (!track->audio.out_samplerate)
2341  track->audio.out_samplerate = track->audio.samplerate;
2342  }
2343  if (encodings_list->nb_elem > 1) {
2344  av_log(matroska->ctx, AV_LOG_ERROR,
2345  "Multiple combined encodings not supported");
2346  } else if (encodings_list->nb_elem == 1) {
2347  if (encodings[0].type) {
2348  if (encodings[0].encryption.key_id.size > 0) {
2349  /* Save the encryption key id to be stored later as a
2350  metadata tag. */
2351  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2352  key_id_base64 = av_malloc(b64_size);
2353  if (key_id_base64 == NULL)
2354  return AVERROR(ENOMEM);
2355 
2356  av_base64_encode(key_id_base64, b64_size,
2357  encodings[0].encryption.key_id.data,
2358  encodings[0].encryption.key_id.size);
2359  } else {
2360  encodings[0].scope = 0;
2361  av_log(matroska->ctx, AV_LOG_ERROR,
2362  "Unsupported encoding type");
2363  }
2364  } else if (
2365 #if CONFIG_ZLIB
2366  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2367 #endif
2368 #if CONFIG_BZLIB
2370 #endif
2371 #if CONFIG_LZO
2373 #endif
2375  encodings[0].scope = 0;
2376  av_log(matroska->ctx, AV_LOG_ERROR,
2377  "Unsupported encoding type");
2378  } else if (track->codec_priv.size && encodings[0].scope & 2) {
2379  uint8_t *codec_priv = track->codec_priv.data;
2380  int ret = matroska_decode_buffer(&track->codec_priv.data,
2381  &track->codec_priv.size,
2382  track);
2383  if (ret < 0) {
2384  track->codec_priv.data = NULL;
2385  track->codec_priv.size = 0;
2386  av_log(matroska->ctx, AV_LOG_ERROR,
2387  "Failed to decode codec private data\n");
2388  }
2389 
2390  if (codec_priv != track->codec_priv.data) {
2391  av_buffer_unref(&track->codec_priv.buf);
2392  if (track->codec_priv.data) {
2393  track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2395  NULL, NULL, 0);
2396  if (!track->codec_priv.buf) {
2397  av_freep(&track->codec_priv.data);
2398  track->codec_priv.size = 0;
2399  return AVERROR(ENOMEM);
2400  }
2401  }
2402  }
2403  }
2404  }
2405 
2406  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2407  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2408  strlen(ff_mkv_codec_tags[j].str))) {
2409  codec_id = ff_mkv_codec_tags[j].id;
2410  break;
2411  }
2412  }
2413 
2414  st = track->stream = avformat_new_stream(s, NULL);
2415  if (!st) {
2416  av_free(key_id_base64);
2417  return AVERROR(ENOMEM);
2418  }
2419 
2420  if (key_id_base64) {
2421  /* export encryption key id as base64 metadata tag */
2422  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2423  av_freep(&key_id_base64);
2424  }
2425 
2426  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2427  track->codec_priv.size >= 40 &&
2428  track->codec_priv.data) {
2429  track->ms_compat = 1;
2430  bit_depth = AV_RL16(track->codec_priv.data + 14);
2431  fourcc = AV_RL32(track->codec_priv.data + 16);
2433  fourcc);
2434  if (!codec_id)
2436  fourcc);
2437  extradata_offset = 40;
2438  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2439  track->codec_priv.size >= 14 &&
2440  track->codec_priv.data) {
2441  int ret;
2442  ffio_init_context(&b, track->codec_priv.data,
2443  track->codec_priv.size,
2444  0, NULL, NULL, NULL, NULL);
2445  ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2446  if (ret < 0)
2447  return ret;
2448  codec_id = st->codecpar->codec_id;
2449  fourcc = st->codecpar->codec_tag;
2450  extradata_offset = FFMIN(track->codec_priv.size, 18);
2451  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2452  /* Normally 36, but allow noncompliant private data */
2453  && (track->codec_priv.size >= 32)
2454  && (track->codec_priv.data)) {
2455  uint16_t sample_size;
2456  int ret = get_qt_codec(track, &fourcc, &codec_id);
2457  if (ret < 0)
2458  return ret;
2459  sample_size = AV_RB16(track->codec_priv.data + 26);
2460  if (fourcc == 0) {
2461  if (sample_size == 8) {
2462  fourcc = MKTAG('r','a','w',' ');
2463  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2464  } else if (sample_size == 16) {
2465  fourcc = MKTAG('t','w','o','s');
2466  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2467  }
2468  }
2469  if ((fourcc == MKTAG('t','w','o','s') ||
2470  fourcc == MKTAG('s','o','w','t')) &&
2471  sample_size == 8)
2472  codec_id = AV_CODEC_ID_PCM_S8;
2473  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2474  (track->codec_priv.size >= 21) &&
2475  (track->codec_priv.data)) {
2476  int ret = get_qt_codec(track, &fourcc, &codec_id);
2477  if (ret < 0)
2478  return ret;
2479  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2480  fourcc = MKTAG('S','V','Q','3');
2481  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2482  }
2483  if (codec_id == AV_CODEC_ID_NONE)
2484  av_log(matroska->ctx, AV_LOG_ERROR,
2485  "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2486  if (track->codec_priv.size >= 86) {
2487  bit_depth = AV_RB16(track->codec_priv.data + 82);
2488  ffio_init_context(&b, track->codec_priv.data,
2489  track->codec_priv.size,
2490  0, NULL, NULL, NULL, NULL);
2491  if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2492  bit_depth &= 0x1F;
2493  track->has_palette = 1;
2494  }
2495  }
2496  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2497  switch (track->audio.bitdepth) {
2498  case 8:
2499  codec_id = AV_CODEC_ID_PCM_U8;
2500  break;
2501  case 24:
2502  codec_id = AV_CODEC_ID_PCM_S24BE;
2503  break;
2504  case 32:
2505  codec_id = AV_CODEC_ID_PCM_S32BE;
2506  break;
2507  }
2508  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2509  switch (track->audio.bitdepth) {
2510  case 8:
2511  codec_id = AV_CODEC_ID_PCM_U8;
2512  break;
2513  case 24:
2514  codec_id = AV_CODEC_ID_PCM_S24LE;
2515  break;
2516  case 32:
2517  codec_id = AV_CODEC_ID_PCM_S32LE;
2518  break;
2519  }
2520  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2521  track->audio.bitdepth == 64) {
2522  codec_id = AV_CODEC_ID_PCM_F64LE;
2523  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2524  int profile = matroska_aac_profile(track->codec_id);
2525  int sri = matroska_aac_sri(track->audio.samplerate);
2526  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2527  if (!extradata)
2528  return AVERROR(ENOMEM);
2529  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2530  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2531  if (strstr(track->codec_id, "SBR")) {
2532  sri = matroska_aac_sri(track->audio.out_samplerate);
2533  extradata[2] = 0x56;
2534  extradata[3] = 0xE5;
2535  extradata[4] = 0x80 | (sri << 3);
2536  extradata_size = 5;
2537  } else
2538  extradata_size = 2;
2539  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2540  /* Only ALAC's magic cookie is stored in Matroska's track headers.
2541  * Create the "atom size", "tag", and "tag version" fields the
2542  * decoder expects manually. */
2543  extradata_size = 12 + track->codec_priv.size;
2544  extradata = av_mallocz(extradata_size +
2546  if (!extradata)
2547  return AVERROR(ENOMEM);
2548  AV_WB32(extradata, extradata_size);
2549  memcpy(&extradata[4], "alac", 4);
2550  AV_WB32(&extradata[8], 0);
2551  memcpy(&extradata[12], track->codec_priv.data,
2552  track->codec_priv.size);
2553  } else if (codec_id == AV_CODEC_ID_TTA) {
2554  extradata_size = 30;
2555  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2556  if (!extradata)
2557  return AVERROR(ENOMEM);
2558  ffio_init_context(&b, extradata, extradata_size, 1,
2559  NULL, NULL, NULL, NULL);
2560  avio_write(&b, "TTA1", 4);
2561  avio_wl16(&b, 1);
2562  if (track->audio.channels > UINT16_MAX ||
2563  track->audio.bitdepth > UINT16_MAX) {
2564  av_log(matroska->ctx, AV_LOG_WARNING,
2565  "Too large audio channel number %"PRIu64
2566  " or bitdepth %"PRIu64". Skipping track.\n",
2567  track->audio.channels, track->audio.bitdepth);
2568  av_freep(&extradata);
2569  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2570  return AVERROR_INVALIDDATA;
2571  else
2572  continue;
2573  }
2574  avio_wl16(&b, track->audio.channels);
2575  avio_wl16(&b, track->audio.bitdepth);
2576  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2577  return AVERROR_INVALIDDATA;
2578  avio_wl32(&b, track->audio.out_samplerate);
2579  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2580  track->audio.out_samplerate,
2581  AV_TIME_BASE * 1000));
2582  } else if (codec_id == AV_CODEC_ID_RV10 ||
2583  codec_id == AV_CODEC_ID_RV20 ||
2584  codec_id == AV_CODEC_ID_RV30 ||
2585  codec_id == AV_CODEC_ID_RV40) {
2586  extradata_offset = 26;
2587  } else if (codec_id == AV_CODEC_ID_RA_144) {
2588  track->audio.out_samplerate = 8000;
2589  track->audio.channels = 1;
2590  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2591  codec_id == AV_CODEC_ID_COOK ||
2592  codec_id == AV_CODEC_ID_ATRAC3 ||
2593  codec_id == AV_CODEC_ID_SIPR)
2594  && track->codec_priv.data) {
2595  int flavor;
2596 
2597  ffio_init_context(&b, track->codec_priv.data,
2598  track->codec_priv.size,
2599  0, NULL, NULL, NULL, NULL);
2600  avio_skip(&b, 22);
2601  flavor = avio_rb16(&b);
2602  track->audio.coded_framesize = avio_rb32(&b);
2603  avio_skip(&b, 12);
2604  track->audio.sub_packet_h = avio_rb16(&b);
2605  track->audio.frame_size = avio_rb16(&b);
2606  track->audio.sub_packet_size = avio_rb16(&b);
2607  if (flavor < 0 ||
2608  track->audio.coded_framesize <= 0 ||
2609  track->audio.sub_packet_h <= 0 ||
2610  track->audio.frame_size <= 0 ||
2611  track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2612  return AVERROR_INVALIDDATA;
2613  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2614  track->audio.frame_size);
2615  if (!track->audio.buf)
2616  return AVERROR(ENOMEM);
2617  if (codec_id == AV_CODEC_ID_RA_288) {
2618  st->codecpar->block_align = track->audio.coded_framesize;
2619  track->codec_priv.size = 0;
2620  } else {
2621  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2622  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2623  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2624  st->codecpar->bit_rate = sipr_bit_rate[flavor];
2625  }
2626  st->codecpar->block_align = track->audio.sub_packet_size;
2627  extradata_offset = 78;
2628  }
2629  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2630  ret = matroska_parse_flac(s, track, &extradata_offset);
2631  if (ret < 0)
2632  return ret;
2633  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2634  fourcc = AV_RL32(track->codec_priv.data);
2635  } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2636  /* we don't need any value stored in CodecPrivate.
2637  make sure that it's not exported as extradata. */
2638  track->codec_priv.size = 0;
2639  } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2640  /* For now, propagate only the OBUs, if any. Once libavcodec is
2641  updated to handle isobmff style extradata this can be removed. */
2642  extradata_offset = 4;
2643  }
2644  track->codec_priv.size -= extradata_offset;
2645 
2646  if (codec_id == AV_CODEC_ID_NONE)
2647  av_log(matroska->ctx, AV_LOG_INFO,
2648  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2649 
2650  if (track->time_scale < 0.01)
2651  track->time_scale = 1.0;
2652  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2653  1000 * 1000 * 1000); /* 64 bit pts in ns */
2654 
2655  /* convert the delay from ns to the track timebase */
2657  (AVRational){ 1, 1000000000 },
2658  st->time_base);
2659 
2660  st->codecpar->codec_id = codec_id;
2661 
2662  if (strcmp(track->language, "und"))
2663  av_dict_set(&st->metadata, "language", track->language, 0);
2664  av_dict_set(&st->metadata, "title", track->name, 0);
2665 
2666  if (track->flag_default)
2668  if (track->flag_forced)
2670 
2671  if (!st->codecpar->extradata) {
2672  if (extradata) {
2673  st->codecpar->extradata = extradata;
2674  st->codecpar->extradata_size = extradata_size;
2675  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2676  if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2677  return AVERROR(ENOMEM);
2678  memcpy(st->codecpar->extradata,
2679  track->codec_priv.data + extradata_offset,
2680  track->codec_priv.size);
2681  }
2682  }
2683 
2684  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2686  int display_width_mul = 1;
2687  int display_height_mul = 1;
2688 
2690  st->codecpar->codec_tag = fourcc;
2691  if (bit_depth >= 0)
2693  st->codecpar->width = track->video.pixel_width;
2694  st->codecpar->height = track->video.pixel_height;
2695 
2697  st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2700 
2702  mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2703 
2706  &st->sample_aspect_ratio.den,
2707  st->codecpar->height * track->video.display_width * display_width_mul,
2708  st->codecpar->width * track->video.display_height * display_height_mul,
2709  255);
2710  }
2711  if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2713 
2714  if (track->default_duration) {
2716  1000000000, track->default_duration, 30000);
2717 #if FF_API_R_FRAME_RATE
2718  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2719  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2720  st->r_frame_rate = st->avg_frame_rate;
2721 #endif
2722  }
2723 
2724  /* export stereo mode flag as metadata tag */
2726  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2727 
2728  /* export alpha mode flag as metadata tag */
2729  if (track->video.alpha_mode)
2730  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2731 
2732  /* if we have virtual track, mark the real tracks */
2733  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2734  char buf[32];
2735  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2736  continue;
2737  snprintf(buf, sizeof(buf), "%s_%d",
2738  ff_matroska_video_stereo_plane[planes[j].type], i);
2739  for (k=0; k < matroska->tracks.nb_elem; k++)
2740  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2741  av_dict_set(&tracks[k].stream->metadata,
2742  "stereo_mode", buf, 0);
2743  break;
2744  }
2745  }
2746  // add stream level stereo3d side data if it is a supported format
2748  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2749  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2750  if (ret < 0)
2751  return ret;
2752  }
2753 
2754  ret = mkv_parse_video_color(st, track);
2755  if (ret < 0)
2756  return ret;
2757  ret = mkv_parse_video_projection(st, track);
2758  if (ret < 0)
2759  return ret;
2760  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2762  st->codecpar->codec_tag = fourcc;
2763  st->codecpar->sample_rate = track->audio.out_samplerate;
2764  st->codecpar->channels = track->audio.channels;
2765  if (!st->codecpar->bits_per_coded_sample)
2767  if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2768  st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2771  else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2773  if (track->codec_delay > 0) {
2775  (AVRational){1, 1000000000},
2776  (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2777  48000 : st->codecpar->sample_rate});
2778  }
2779  if (track->seek_preroll > 0) {
2781  (AVRational){1, 1000000000},
2782  (AVRational){1, st->codecpar->sample_rate});
2783  }
2784  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2786 
2787  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2789  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2791  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2793  }
2794  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2796  }
2797  }
2798 
2799  return 0;
2800 }
2801 
2803 {
2804  MatroskaDemuxContext *matroska = s->priv_data;
2805  EbmlList *attachments_list = &matroska->attachments;
2806  EbmlList *chapters_list = &matroska->chapters;
2807  MatroskaAttachment *attachments;
2808  MatroskaChapter *chapters;
2809  uint64_t max_start = 0;
2810  int64_t pos;
2811  Ebml ebml = { 0 };
2812  int i, j, res;
2813 
2814  matroska->ctx = s;
2815  matroska->cues_parsing_deferred = 1;
2816 
2817  /* First read the EBML header. */
2818  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2819  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2820  ebml_free(ebml_syntax, &ebml);
2821  return AVERROR_INVALIDDATA;
2822  }
2823  if (ebml.version > EBML_VERSION ||
2824  ebml.max_size > sizeof(uint64_t) ||
2825  ebml.id_length > sizeof(uint32_t) ||
2826  ebml.doctype_version > 3) {
2828  "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2829  ebml.version, ebml.doctype, ebml.doctype_version);
2830  ebml_free(ebml_syntax, &ebml);
2831  return AVERROR_PATCHWELCOME;
2832  } else if (ebml.doctype_version == 3) {
2833  av_log(matroska->ctx, AV_LOG_WARNING,
2834  "EBML header using unsupported features\n"
2835  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2836  ebml.version, ebml.doctype, ebml.doctype_version);
2837  }
2838  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2839  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2840  break;
2841  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2842  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2843  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2844  ebml_free(ebml_syntax, &ebml);
2845  return AVERROR_INVALIDDATA;
2846  }
2847  }
2848  ebml_free(ebml_syntax, &ebml);
2849 
2850  /* The next thing is a segment. */
2851  pos = avio_tell(matroska->ctx->pb);
2852  res = ebml_parse(matroska, matroska_segments, matroska);
2853  // Try resyncing until we find an EBML_STOP type element.
2854  while (res != 1) {
2855  res = matroska_resync(matroska, pos);
2856  if (res < 0)
2857  goto fail;
2858  pos = avio_tell(matroska->ctx->pb);
2859  res = ebml_parse(matroska, matroska_segment, matroska);
2860  }
2861  /* Set data_offset as it might be needed later by seek_frame_generic. */
2862  if (matroska->current_id == MATROSKA_ID_CLUSTER)
2863  s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2864  matroska_execute_seekhead(matroska);
2865 
2866  if (!matroska->time_scale)
2867  matroska->time_scale = 1000000;
2868  if (matroska->duration)
2869  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2870  1000 / AV_TIME_BASE;
2871  av_dict_set(&s->metadata, "title", matroska->title, 0);
2872  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2873 
2874  if (matroska->date_utc.size == 8)
2876 
2877  res = matroska_parse_tracks(s);
2878  if (res < 0)
2879  goto fail;
2880 
2881  attachments = attachments_list->elem;
2882  for (j = 0; j < attachments_list->nb_elem; j++) {
2883  if (!(attachments[j].filename && attachments[j].mime &&
2884  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2885  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2886  } else {
2887  AVStream *st = avformat_new_stream(s, NULL);
2888  if (!st)
2889  break;
2890  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2891  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2893 
2894  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2895  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2896  strlen(ff_mkv_image_mime_tags[i].str))) {
2898  break;
2899  }
2900  }
2901 
2902  attachments[j].stream = st;
2903 
2904  if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2905  AVPacket *pkt = &st->attached_pic;
2906 
2909 
2910  av_init_packet(pkt);
2911  pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2912  if (!pkt->buf)
2913  return AVERROR(ENOMEM);
2914  pkt->data = attachments[j].bin.data;
2915  pkt->size = attachments[j].bin.size;
2916  pkt->stream_index = st->index;
2917  pkt->flags |= AV_PKT_FLAG_KEY;
2918  } else {
2920  if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2921  break;
2922  memcpy(st->codecpar->extradata, attachments[j].bin.data,
2923  attachments[j].bin.size);
2924 
2925  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2926  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2927  strlen(ff_mkv_mime_tags[i].str))) {
2929  break;
2930  }
2931  }
2932  }
2933  }
2934  }
2935 
2936  chapters = chapters_list->elem;
2937  for (i = 0; i < chapters_list->nb_elem; i++)
2938  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2939  (max_start == 0 || chapters[i].start > max_start)) {
2940  chapters[i].chapter =
2941  avpriv_new_chapter(s, chapters[i].uid,
2942  (AVRational) { 1, 1000000000 },
2943  chapters[i].start, chapters[i].end,
2944  chapters[i].title);
2945  if (chapters[i].chapter) {
2946  av_dict_set(&chapters[i].chapter->metadata,
2947  "title", chapters[i].title, 0);
2948  }
2949  max_start = chapters[i].start;
2950  }
2951 
2952  matroska_add_index_entries(matroska);
2953 
2955 
2956  return 0;
2957 fail:
2959  return res;
2960 }
2961 
2962 /*
2963  * Put one packet in an application-supplied AVPacket struct.
2964  * Returns 0 on success or -1 on failure.
2965  */
2967  AVPacket *pkt)
2968 {
2969  if (matroska->queue) {
2970  MatroskaTrack *tracks = matroska->tracks.elem;
2971  MatroskaTrack *track;
2972 
2973  ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2974  track = &tracks[pkt->stream_index];
2975  if (track->has_palette) {
2977  if (!pal) {
2978  av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2979  } else {
2980  memcpy(pal, track->palette, AVPALETTE_SIZE);
2981  }
2982  track->has_palette = 0;
2983  }
2984  return 0;
2985  }
2986 
2987  return -1;
2988 }
2989 
2990 /*
2991  * Free all packets in our internal queue.
2992  */
2994 {
2995  ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2996 }
2997 
2999  int *buf_size, int type,
3000  uint32_t **lace_buf, int *laces)
3001 {
3002  int res = 0, n, size = *buf_size;
3003  uint8_t *data = *buf;
3004  uint32_t *lace_size;
3005 
3006  if (!type) {
3007  *laces = 1;
3008  *lace_buf = av_malloc(sizeof(**lace_buf));
3009  if (!*lace_buf)
3010  return AVERROR(ENOMEM);
3011 
3012  *lace_buf[0] = size;
3013  return 0;
3014  }
3015 
3016  av_assert0(size > 0);
3017  *laces = *data + 1;
3018  data += 1;
3019  size -= 1;
3020  lace_size = av_malloc_array(*laces, sizeof(*lace_size));
3021  if (!lace_size)
3022  return AVERROR(ENOMEM);
3023 
3024  switch (type) {
3025  case 0x1: /* Xiph lacing */
3026  {
3027  uint8_t temp;
3028  uint32_t total = 0;
3029  for (n = 0; res == 0 && n < *laces - 1; n++) {
3030  lace_size[n] = 0;
3031 
3032  while (1) {
3033  if (size <= total) {
3034  res = AVERROR_INVALIDDATA;
3035  break;
3036  }
3037  temp = *data;
3038  total += temp;
3039  lace_size[n] += temp;
3040  data += 1;
3041  size -= 1;
3042  if (temp != 0xff)
3043  break;
3044  }
3045  }
3046  if (size <= total) {
3047  res = AVERROR_INVALIDDATA;
3048  break;
3049  }
3050 
3051  lace_size[n] = size - total;
3052  break;
3053  }
3054 
3055  case 0x2: /* fixed-size lacing */
3056  if (size % (*laces)) {
3057  res = AVERROR_INVALIDDATA;
3058  break;
3059  }
3060  for (n = 0; n < *laces; n++)
3061  lace_size[n] = size / *laces;
3062  break;
3063 
3064  case 0x3: /* EBML lacing */
3065  {
3066  uint64_t num;
3067  uint64_t total;
3068  n = matroska_ebmlnum_uint(matroska, data, size, &num);
3069  if (n < 0 || num > INT_MAX) {
3070  av_log(matroska->ctx, AV_LOG_INFO,
3071  "EBML block data error\n");
3072  res = n<0 ? n : AVERROR_INVALIDDATA;
3073  break;
3074  }
3075  data += n;
3076  size -= n;
3077  total = lace_size[0] = num;
3078  for (n = 1; res == 0 && n < *laces - 1; n++) {
3079  int64_t snum;
3080  int r;
3081  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
3082  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
3083  av_log(matroska->ctx, AV_LOG_INFO,
3084  "EBML block data error\n");
3085  res = r<0 ? r : AVERROR_INVALIDDATA;
3086  break;
3087  }
3088  data += r;
3089  size -= r;
3090  lace_size[n] = lace_size[n - 1] + snum;
3091  total += lace_size[n];
3092  }
3093  if (size <= total) {
3094  res = AVERROR_INVALIDDATA;
3095  break;
3096  }
3097  lace_size[*laces - 1] = size - total;
3098  break;
3099  }
3100  }
3101 
3102  *buf = data;
3103  *lace_buf = lace_size;
3104  *buf_size = size;
3105 
3106  return res;
3107 }
3108 
3110  MatroskaTrack *track, AVStream *st,
3111  uint8_t *data, int size, uint64_t timecode,
3112  int64_t pos)
3113 {
3114  int a = st->codecpar->block_align;
3115  int sps = track->audio.sub_packet_size;
3116  int cfs = track->audio.coded_framesize;
3117  int h = track->audio.sub_packet_h;
3118  int y = track->audio.sub_packet_cnt;
3119  int w = track->audio.frame_size;
3120  int x;
3121 
3122  if (!track->audio.pkt_cnt) {
3123  if (track->audio.sub_packet_cnt == 0)
3124  track->audio.buf_timecode = timecode;
3125  if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
3126  if (size < cfs * h / 2) {
3127  av_log(matroska->ctx, AV_LOG_ERROR,
3128  "Corrupt int4 RM-style audio packet size\n");
3129  return AVERROR_INVALIDDATA;
3130  }
3131  for (x = 0; x < h / 2; x++)
3132  memcpy(track->audio.buf + x * 2 * w + y * cfs,
3133  data + x * cfs, cfs);
3134  } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3135  if (size < w) {
3136  av_log(matroska->ctx, AV_LOG_ERROR,
3137  "Corrupt sipr RM-style audio packet size\n");
3138  return AVERROR_INVALIDDATA;
3139  }
3140  memcpy(track->audio.buf + y * w, data, w);
3141  } else {
3142  if (size < sps * w / sps || h<=0 || w%sps) {
3143  av_log(matroska->ctx, AV_LOG_ERROR,
3144  "Corrupt generic RM-style audio packet size\n");
3145  return AVERROR_INVALIDDATA;
3146  }
3147  for (x = 0; x < w / sps; x++)
3148  memcpy(track->audio.buf +
3149  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3150  data + x * sps, sps);
3151  }
3152 
3153  if (++track->audio.sub_packet_cnt >= h) {
3154  if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3155  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3156  track->audio.sub_packet_cnt = 0;
3157  track->audio.pkt_cnt = h * w / a;
3158  }
3159  }
3160 
3161  while (track->audio.pkt_cnt) {
3162  int ret;
3163  AVPacket pktl, *pkt = &pktl;
3164 
3165  ret = av_new_packet(pkt, a);
3166  if (ret < 0) {
3167  return ret;
3168  }
3169  memcpy(pkt->data,
3170  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3171  a);
3172  pkt->pts = track->audio.buf_timecode;
3174  pkt->pos = pos;
3175  pkt->stream_index = st->index;
3176  ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3177  if (ret < 0) {
3178  av_packet_unref(pkt);
3179  return AVERROR(ENOMEM);
3180  }
3181  }
3182 
3183  return 0;
3184 }
3185 
3186 /* reconstruct full wavpack blocks from mangled matroska ones */
3188  uint8_t **pdst, int *size)
3189 {
3190  uint8_t *dst = NULL;
3191  int dstlen = 0;
3192  int srclen = *size;
3193  uint32_t samples;
3194  uint16_t ver;
3195  int ret, offset = 0;
3196 
3197  if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3198  return AVERROR_INVALIDDATA;
3199 
3200  ver = AV_RL16(track->stream->codecpar->extradata);
3201 
3202  samples = AV_RL32(src);
3203  src += 4;
3204  srclen -= 4;
3205 
3206  while (srclen >= 8) {
3207  int multiblock;
3208  uint32_t blocksize;
3209  uint8_t *tmp;
3210 
3211  uint32_t flags = AV_RL32(src);
3212  uint32_t crc = AV_RL32(src + 4);
3213  src += 8;
3214  srclen -= 8;
3215 
3216  multiblock = (flags & 0x1800) != 0x1800;
3217  if (multiblock) {
3218  if (srclen < 4) {
3219  ret = AVERROR_INVALIDDATA;
3220  goto fail;
3221  }
3222  blocksize = AV_RL32(src);
3223  src += 4;
3224  srclen -= 4;
3225  } else
3226  blocksize = srclen;
3227 
3228  if (blocksize > srclen) {
3229  ret = AVERROR_INVALIDDATA;
3230  goto fail;
3231  }
3232 
3233  tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3234  if (!tmp) {
3235  ret = AVERROR(ENOMEM);
3236  goto fail;
3237  }
3238  dst = tmp;
3239  dstlen += blocksize + 32;
3240 
3241  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3242  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3243  AV_WL16(dst + offset + 8, ver); // version
3244  AV_WL16(dst + offset + 10, 0); // track/index_no
3245  AV_WL32(dst + offset + 12, 0); // total samples
3246  AV_WL32(dst + offset + 16, 0); // block index
3247  AV_WL32(dst + offset + 20, samples); // number of samples
3248  AV_WL32(dst + offset + 24, flags); // flags
3249  AV_WL32(dst + offset + 28, crc); // crc
3250  memcpy(dst + offset + 32, src, blocksize); // block data
3251 
3252  src += blocksize;
3253  srclen -= blocksize;
3254  offset += blocksize + 32;
3255  }
3256 
3257  memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3258 
3259  *pdst = dst;
3260  *size = dstlen;
3261 
3262  return 0;
3263 
3264 fail:
3265  av_freep(&dst);
3266  return ret;
3267 }
3268 
3270  uint8_t **pdst, int *size)
3271 {
3272  uint8_t *dst = src;
3273  int dstlen = *size;
3274 
3275  if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3276  dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3277  if (!dst)
3278  return AVERROR(ENOMEM);
3279 
3280  AV_WB32(dst, dstlen);
3281  AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3282  memcpy(dst + 8, src, dstlen);
3283  memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3284  dstlen += 8;
3285  }
3286 
3287  *pdst = dst;
3288  *size = dstlen;
3289 
3290  return 0;
3291 }
3292 
3294  MatroskaTrack *track,
3295  AVStream *st,
3296  uint8_t *data, int data_len,
3297  uint64_t timecode,
3298  uint64_t duration,
3299  int64_t pos)
3300 {
3301  AVPacket pktl, *pkt = &pktl;
3302  uint8_t *id, *settings, *text, *buf;
3303  int id_len, settings_len, text_len;
3304  uint8_t *p, *q;
3305  int err;
3306 
3307  if (data_len <= 0)
3308  return AVERROR_INVALIDDATA;
3309 
3310  p = data;
3311  q = data + data_len;
3312 
3313  id = p;
3314  id_len = -1;
3315  while (p < q) {
3316  if (*p == '\r' || *p == '\n') {
3317  id_len = p - id;
3318  if (*p == '\r')
3319  p++;
3320  break;
3321  }
3322  p++;
3323  }
3324 
3325  if (p >= q || *p != '\n')
3326  return AVERROR_INVALIDDATA;
3327  p++;
3328 
3329  settings = p;
3330  settings_len = -1;
3331  while (p < q) {
3332  if (*p == '\r' || *p == '\n') {
3333  settings_len = p - settings;
3334  if (*p == '\r')
3335  p++;
3336  break;
3337  }
3338  p++;
3339  }
3340 
3341  if (p >= q || *p != '\n')
3342  return AVERROR_INVALIDDATA;
3343  p++;
3344 
3345  text = p;
3346  text_len = q - p;
3347  while (text_len > 0) {
3348  const int len = text_len - 1;
3349  const uint8_t c = p[len];
3350  if (c != '\r' && c != '\n')
3351  break;
3352  text_len = len;
3353  }
3354 
3355  if (text_len <= 0)
3356  return AVERROR_INVALIDDATA;
3357 
3358  err = av_new_packet(pkt, text_len);
3359  if (err < 0) {
3360  return err;
3361  }
3362 
3363  memcpy(pkt->data, text, text_len);
3364 
3365  if (id_len > 0) {
3366  buf = av_packet_new_side_data(pkt,
3368  id_len);
3369  if (!buf) {
3370  av_packet_unref(pkt);
3371  return AVERROR(ENOMEM);
3372  }
3373  memcpy(buf, id, id_len);
3374  }
3375 
3376  if (settings_len > 0) {
3377  buf = av_packet_new_side_data(pkt,
3379  settings_len);
3380  if (!buf) {
3381  av_packet_unref(pkt);
3382  return AVERROR(ENOMEM);
3383  }
3384  memcpy(buf, settings, settings_len);
3385  }
3386 
3387  // Do we need this for subtitles?
3388  // pkt->flags = AV_PKT_FLAG_KEY;
3389 
3390  pkt->stream_index = st->index;
3391  pkt->pts = timecode;
3392 
3393  // Do we need this for subtitles?
3394  // pkt->dts = timecode;
3395 
3396  pkt->duration = duration;
3397  pkt->pos = pos;
3398 
3399  err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3400  if (err < 0) {
3401  av_packet_unref(pkt);
3402  return AVERROR(ENOMEM);
3403  }
3404 
3405  return 0;
3406 }
3407 
3409  MatroskaTrack *track, AVStream *st,
3410  AVBufferRef *buf, uint8_t *data, int pkt_size,
3411  uint64_t timecode, uint64_t lace_duration,
3412  int64_t pos, int is_keyframe,
3413  uint8_t *additional, uint64_t additional_id, int additional_size,
3414  int64_t discard_padding)
3415 {
3416  MatroskaTrackEncoding *encodings = track->encodings.elem;
3417  uint8_t *pkt_data = data;
3418  int res;
3419  AVPacket pktl, *pkt = &pktl;
3420 
3421  if (encodings && !encodings->type && encodings->scope & 1) {
3422  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3423  if (res < 0)
3424  return res;
3425  }
3426 
3427  if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3428  uint8_t *wv_data;
3429  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3430  if (res < 0) {
3431  av_log(matroska->ctx, AV_LOG_ERROR,
3432  "Error parsing a wavpack block.\n");
3433  goto fail;
3434  }
3435  if (pkt_data != data)
3436  av_freep(&pkt_data);
3437  pkt_data = wv_data;
3438  }
3439 
3440  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3441  uint8_t *pr_data;
3442  res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3443  if (res < 0) {
3444  av_log(matroska->ctx, AV_LOG_ERROR,
3445  "Error parsing a prores block.\n");
3446  goto fail;
3447  }
3448  if (pkt_data != data)
3449  av_freep(&pkt_data);
3450  pkt_data = pr_data;
3451  }
3452 
3453  av_init_packet(pkt);
3454  if (pkt_data != data)
3455  pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3456  NULL, NULL, 0);
3457  else
3458  pkt->buf = av_buffer_ref(buf);
3459 
3460  if (!pkt->buf) {
3461  res = AVERROR(ENOMEM);
3462  goto fail;
3463  }
3464 
3465  pkt->data = pkt_data;
3466  pkt->size = pkt_size;
3467  pkt->flags = is_keyframe;
3468  pkt->stream_index = st->index;
3469 
3470  if (additional_size > 0) {
3471  uint8_t *side_data = av_packet_new_side_data(pkt,
3473  additional_size + 8);
3474  if (!side_data) {
3475  av_packet_unref(pkt);
3476  return AVERROR(ENOMEM);
3477  }
3478  AV_WB64(side_data, additional_id);
3479  memcpy(side_data + 8, additional, additional_size);
3480  }
3481 
3482  if (discard_padding) {
3483  uint8_t *side_data = av_packet_new_side_data(pkt,
3485  10);
3486  if (!side_data) {
3487  av_packet_unref(pkt);
3488  return AVERROR(ENOMEM);
3489  }
3490  discard_padding = av_rescale_q(discard_padding,
3491  (AVRational){1, 1000000000},
3492  (AVRational){1, st->codecpar->sample_rate});
3493  if (discard_padding > 0) {
3494  AV_WL32(side_data + 4, discard_padding);
3495  } else {
3496  AV_WL32(side_data, -discard_padding);
3497  }
3498  }
3499 
3500  if (track->ms_compat)
3501  pkt->dts = timecode;
3502  else
3503  pkt->pts = timecode;
3504  pkt->pos = pos;
3505  pkt->duration = lace_duration;
3506 
3507 #if FF_API_CONVERGENCE_DURATION
3509  if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3510  pkt->convergence_duration = lace_duration;
3511  }
3513 #endif
3514 
3515  res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3516  if (res < 0) {
3517  av_packet_unref(pkt);
3518  return AVERROR(ENOMEM);
3519  }
3520 
3521  return 0;
3522 
3523 fail:
3524  if (pkt_data != data)
3525  av_freep(&pkt_data);
3526  return res;
3527 }
3528 
3530  int size, int64_t pos, uint64_t cluster_time,
3531  uint64_t block_duration, int is_keyframe,
3532  uint8_t *additional, uint64_t additional_id, int additional_size,
3533  int64_t cluster_pos, int64_t discard_padding)
3534 {
3535  uint64_t timecode = AV_NOPTS_VALUE;
3536  MatroskaTrack *track;
3537  int res = 0;
3538  AVStream *st;
3539  int16_t block_time;
3540  uint32_t *lace_size = NULL;
3541  int n, flags, laces = 0;
3542  uint64_t num;
3543  int trust_default_duration = 1;
3544 
3545  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3546  return n;
3547  }
3548  data += n;
3549  size -= n;
3550 
3551  track = matroska_find_track_by_num(matroska, num);
3552  if (!track || !track->stream) {
3553  av_log(matroska->ctx, AV_LOG_INFO,
3554  "Invalid stream %"PRIu64"\n", num);
3555  return AVERROR_INVALIDDATA;
3556  } else if (size <= 3)
3557  return 0;
3558  st = track->stream;
3559  if (st->discard >= AVDISCARD_ALL)
3560  return res;
3561  av_assert1(block_duration != AV_NOPTS_VALUE);
3562 
3563  block_time = sign_extend(AV_RB16(data), 16);
3564  data += 2;
3565  flags = *data++;
3566  size -= 3;
3567  if (is_keyframe == -1)
3568  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3569 
3570  if (cluster_time != (uint64_t) -1 &&
3571  (block_time >= 0 || cluster_time >= -block_time)) {
3572  timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3573  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3574  timecode < track->end_timecode)
3575  is_keyframe = 0; /* overlapping subtitles are not key frame */
3576  if (is_keyframe) {
3577  ff_reduce_index(matroska->ctx, st->index);
3578  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3580  }
3581  }
3582 
3583  if (matroska->skip_to_keyframe &&
3584  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3585  // Compare signed timecodes. Timecode may be negative due to codec delay
3586  // offset. We don't support timestamps greater than int64_t anyway - see
3587  // AVPacket's pts.
3588  if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3589  return res;
3590  if (is_keyframe)
3591  matroska->skip_to_keyframe = 0;
3592  else if (!st->skip_to_keyframe) {
3593  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3594  matroska->skip_to_keyframe = 0;
3595  }
3596  }
3597 
3598  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3599  &lace_size, &laces);
3600 
3601  if (res)
3602  goto end;
3603 
3604  if (track->audio.samplerate == 8000) {
3605  // If this is needed for more codecs, then add them here
3606  if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3607  if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3608  trust_default_duration = 0;
3609  }
3610  }
3611 
3612  if (!block_duration && trust_default_duration)
3613  block_duration = track->default_duration * laces / matroska->time_scale;
3614 
3615  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3616  track->end_timecode =
3617  FFMAX(track->end_timecode, timecode + block_duration);
3618 
3619  for (n = 0; n < laces; n++) {
3620  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3621 
3622  if (lace_size[n] > size) {
3623  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3624  break;
3625  }
3626 
3627  if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3631  st->codecpar->block_align && track->audio.sub_packet_size) {
3632  res = matroska_parse_rm_audio(matroska, track, st, data,
3633  lace_size[n],
3634  timecode, pos);
3635  if (res)
3636  goto end;
3637 
3638  } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3639  res = matroska_parse_webvtt(matroska, track, st,
3640  data, lace_size[n],
3641  timecode, lace_duration,
3642  pos);
3643  if (res)
3644  goto end;
3645  } else {
3646  res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3647  timecode, lace_duration, pos,
3648  !n ? is_keyframe : 0,
3649  additional, additional_id, additional_size,
3650  discard_padding);
3651  if (res)
3652  goto end;
3653  }
3654 
3655  if (timecode != AV_NOPTS_VALUE)
3656  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3657  data += lace_size[n];
3658  size -= lace_size[n];
3659  }
3660 
3661 end:
3662  av_free(lace_size);
3663  return res;
3664 }
3665 
3667 {
3668  MatroskaCluster *cluster = &matroska->current_cluster;
3669  MatroskaBlock *block = &cluster->block;
3670  int res;
3671 
3672  av_assert0(matroska->num_levels <= 2);
3673 
3674  if (matroska->num_levels == 1) {
3675  res = ebml_parse(matroska, matroska_segment, NULL);
3676 
3677  if (res == 1) {
3678  /* Found a cluster: subtract the size of the ID already read. */
3679  cluster->pos = avio_tell(matroska->ctx->pb) - 4;
3680 
3681  res = ebml_parse(matroska, matroska_cluster_enter, cluster);
3682  if (res < 0)
3683  return res;
3684  }
3685  }
3686 
3687  if (matroska->num_levels == 2) {
3688  /* We are inside a cluster. */
3689  res = ebml_parse(matroska, matroska_cluster_parsing, cluster);
3690 
3691  if (res >= 0 && block->bin.size > 0) {
3692  int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3693  uint8_t* additional = block->additional.size > 0 ?
3694  block->additional.data : NULL;
3695 
3696  res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3697  block->bin.size, block->bin.pos,
3698  cluster->timecode, block->duration,
3699  is_keyframe, additional, block->additional_id,
3700  block->additional.size, cluster->pos,
3701  block->discard_padding);
3702  }
3703 
3704  ebml_free(matroska_blockgroup, block);
3705  memset(block, 0, sizeof(*block));
3706  } else if (!matroska->num_levels) {
3707  if (!avio_feof(matroska->ctx->pb)) {
3708  avio_r8(matroska->ctx->pb);
3709  if (!avio_feof(matroska->ctx->pb)) {
3710  av_log(matroska->ctx, AV_LOG_WARNING, "File extends beyond "
3711  "end of segment.\n");
3712  return AVERROR_INVALIDDATA;
3713  }
3714  }
3715  matroska->done = 1;
3716  return AVERROR_EOF;
3717  }
3718 
3719  return res;
3720 }
3721 
3723 {
3724  MatroskaDemuxContext *matroska = s->priv_data;
3725  int ret = 0;
3726 
3727  if (matroska->resync_pos == -1) {
3728  // This can only happen if generic seeking has been used.
3729  matroska->resync_pos = avio_tell(s->pb);
3730  }
3731 
3732  while (matroska_deliver_packet(matroska, pkt)) {
3733  if (matroska->done)
3734  return (ret < 0) ? ret : AVERROR_EOF;
3735  if (matroska_parse_cluster(matroska) < 0 && !matroska->done)
3736  ret = matroska_resync(matroska, matroska->resync_pos);
3737  }
3738 
3739  return 0;
3740 }
3741 
3742 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3743  int64_t timestamp, int flags)
3744 {
3745  MatroskaDemuxContext *matroska = s->priv_data;
3746  MatroskaTrack *tracks = NULL;
3747  AVStream *st = s->streams[stream_index];
3748  int i, index;
3749 
3750  /* Parse the CUES now since we need the index data to seek. */
3751  if (matroska->cues_parsing_deferred > 0) {
3752  matroska->cues_parsing_deferred = 0;
3753  matroska_parse_cues(matroska);
3754  }
3755 
3756  if (!st->nb_index_entries)
3757  goto err;
3758  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3759 
3760  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3761  matroska_reset_status(matroska, 0, st->index_entries[st->nb_index_entries - 1].pos);
3762  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3763  matroska_clear_queue(matroska);
3764  if (matroska_parse_cluster(matroska) < 0)
3765  break;
3766  }
3767  }
3768 
3769  matroska_clear_queue(matroska);
3770  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3771  goto err;
3772 
3773  tracks = matroska->tracks.elem;
3774  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3775  tracks[i].audio.pkt_cnt = 0;
3776  tracks[i].audio.sub_packet_cnt = 0;
3777  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3778  tracks[i].end_timecode = 0;
3779  }
3780 
3781  /* We seek to a level 1 element, so set the appropriate status. */
3782  matroska_reset_status(matroska, 0, st->index_entries[index].pos);
3783  if (flags & AVSEEK_FLAG_ANY) {
3784  st->skip_to_keyframe = 0;
3785  matroska->skip_to_timecode = timestamp;
3786  } else {
3787  st->skip_to_keyframe = 1;
3788  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3789  }
3790  matroska->skip_to_keyframe = 1;
3791  matroska->done = 0;
3792  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3793  return 0;
3794 err:
3795  // slightly hackish but allows proper fallback to
3796  // the generic seeking code.
3797  matroska_reset_status(matroska, 0, -1);
3798  matroska->resync_pos = -1;
3799  matroska_clear_queue(matroska);
3800  st->skip_to_keyframe =
3801  matroska->skip_to_keyframe = 0;
3802  matroska->done = 0;
3803  return -1;
3804 }
3805 
3807 {
3808  MatroskaDemuxContext *matroska = s->priv_data;
3809  MatroskaTrack *tracks = matroska->tracks.elem;
3810  int n;
3811 
3812  matroska_clear_queue(matroska);
3813 
3814  for (n = 0; n < matroska->tracks.nb_elem; n++)
3815  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3816  av_freep(&tracks[n].audio.buf);
3817  ebml_free(matroska_segment, matroska);
3818 
3819  return 0;
3820 }
3821 
3822 typedef struct {
3823  int64_t start_time_ns;
3824  int64_t end_time_ns;
3825  int64_t start_offset;
3826  int64_t end_offset;
3827 } CueDesc;
3828 
3829 /* This function searches all the Cues and returns the CueDesc corresponding to
3830  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3831  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3832  */
3833 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3834  MatroskaDemuxContext *matroska = s->priv_data;
3835  CueDesc cue_desc;
3836  int i;
3837  int nb_index_entries = s->streams[0]->nb_index_entries;
3838  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3839  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3840  for (i = 1; i < nb_index_entries; i++) {
3841  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3842  index_entries[i].timestamp * matroska->time_scale > ts) {
3843  break;
3844  }
3845  }
3846  --i;
3847  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3848  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3849  if (i != nb_index_entries - 1) {
3850  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3851  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3852  } else {
3853  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3854  // FIXME: this needs special handling for files where Cues appear
3855  // before Clusters. the current logic assumes Cues appear after
3856  // Clusters.
3857  cue_desc.end_offset = cues_start - matroska->segment_start;
3858  }
3859  return cue_desc;
3860 }
3861 
3863 {
3864  MatroskaDemuxContext *matroska = s->priv_data;
3865  uint32_t id = matroska->current_id;
3866  int64_t cluster_pos, before_pos;
3867  int index, rv = 1;
3868  if (s->streams[0]->nb_index_entries <= 0) return 0;
3869  // seek to the first cluster using cues.
3870  index = av_index_search_timestamp(s->streams[0], 0, 0);
3871  if (index < 0) return 0;
3872  cluster_pos = s->streams[0]->index_entries[index].pos;
3873  before_pos = avio_tell(s->pb);
3874  while (1) {
3875  uint64_t cluster_id, cluster_length;
3876  int read;
3877  AVPacket *pkt;
3878  avio_seek(s->pb, cluster_pos, SEEK_SET);
3879  // read cluster id and length
3880  read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3881  if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3882  break;
3883  read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3884  if (read < 0)
3885  break;
3886 
3887  matroska_reset_status(matroska, 0, cluster_pos);
3888  matroska_clear_queue(matroska);
3889  if (matroska_parse_cluster(matroska) < 0 ||
3890  !matroska->queue) {
3891  break;
3892  }
3893  pkt = &matroska->queue->pkt;
3894  // 4 + read is the length of the cluster id and the cluster length field.
3895  cluster_pos += 4 + read + cluster_length;
3896  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3897  rv = 0;
3898  break;
3899  }
3900  }
3901 
3902  /* Restore the status after matroska_read_header: */
3903  matroska_reset_status(matroska, id, before_pos);
3904 
3905  return rv;
3906 }
3907 
3908 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3909  double min_buffer, double* buffer,
3910  double* sec_to_download, AVFormatContext *s,
3911  int64_t cues_start)
3912 {
3913  double nano_seconds_per_second = 1000000000.0;
3914  double time_sec = time_ns / nano_seconds_per_second;
3915  int rv = 0;
3916  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3917  int64_t end_time_ns = time_ns + time_to_search_ns;
3918  double sec_downloaded = 0.0;
3919  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3920  if (desc_curr.start_time_ns == -1)
3921  return -1;
3922  *sec_to_download = 0.0;
3923 
3924  // Check for non cue start time.
3925  if (time_ns > desc_curr.start_time_ns) {
3926  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3927  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3928  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3929  double timeToDownload = (cueBytes * 8.0) / bps;
3930 
3931  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3932  *sec_to_download += timeToDownload;
3933 
3934  // Check if the search ends within the first cue.
3935  if (desc_curr.end_time_ns >= end_time_ns) {
3936  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3937  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3938  sec_downloaded = percent_to_sub * sec_downloaded;
3939  *sec_to_download = percent_to_sub * *sec_to_download;
3940  }
3941 
3942  if ((sec_downloaded + *buffer) <= min_buffer) {
3943  return 1;
3944  }
3945 
3946  // Get the next Cue.
3947  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3948  }
3949 
3950  while (desc_curr.start_time_ns != -1) {
3951  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3952  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3953  double desc_sec = desc_ns / nano_seconds_per_second;
3954  double bits = (desc_bytes * 8.0);
3955  double time_to_download = bits / bps;
3956 
3957  sec_downloaded += desc_sec - time_to_download;
3958  *sec_to_download += time_to_download;
3959 
3960  if (desc_curr.end_time_ns >= end_time_ns) {
3961  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3962  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3963  sec_downloaded = percent_to_sub * sec_downloaded;
3964  *sec_to_download = percent_to_sub * *sec_to_download;
3965 
3966  if ((sec_downloaded + *buffer) <= min_buffer)
3967  rv = 1;
3968  break;
3969  }
3970 
3971  if ((sec_downloaded + *buffer) <= min_buffer) {
3972  rv = 1;
3973  break;
3974  }
3975 
3976  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3977  }
3978  *buffer = *buffer + sec_downloaded;
3979  return rv;
3980 }
3981 
3982 /* This function computes the bandwidth of the WebM file with the help of
3983  * buffer_size_after_time_downloaded() function. Both of these functions are
3984  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3985  * Matroska parsing mechanism.
3986  *
3987  * Returns the bandwidth of the file on success; -1 on error.
3988  * */
3989 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3990 {
3991  MatroskaDemuxContext *matroska = s->priv_data;
3992  AVStream *st = s->streams[0];
3993  double bandwidth = 0.0;
3994  int i;
3995 
3996  for (i = 0; i < st->nb_index_entries; i++) {
3997  int64_t prebuffer_ns = 1000000000;
3998  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3999  double nano_seconds_per_second = 1000000000.0;
4000  int64_t prebuffered_ns = time_ns + prebuffer_ns;
4001  double prebuffer_bytes = 0.0;
4002  int64_t temp_prebuffer_ns = prebuffer_ns;
4003  int64_t pre_bytes, pre_ns;
4004  double pre_sec, prebuffer, bits_per_second;
4005  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
4006 
4007  // Start with the first Cue.
4008  CueDesc desc_end = desc_beg;
4009 
4010  // Figure out how much data we have downloaded for the prebuffer. This will
4011  // be used later to adjust the bits per sample to try.
4012  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
4013  // Prebuffered the entire Cue.
4014  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
4015  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
4016  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4017  }
4018  if (desc_end.start_time_ns == -1) {
4019  // The prebuffer is larger than the duration.
4020  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
4021  return -1;
4022  bits_per_second = 0.0;
4023  } else {
4024  // The prebuffer ends in the last Cue. Estimate how much data was
4025  // prebuffered.
4026  pre_bytes = desc_end.end_offset - desc_end.start_offset;
4027  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
4028  pre_sec = pre_ns / nano_seconds_per_second;
4029  prebuffer_bytes +=
4030  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
4031 
4032  prebuffer = prebuffer_ns / nano_seconds_per_second;
4033 
4034  // Set this to 0.0 in case our prebuffer buffers the entire video.
4035  bits_per_second = 0.0;
4036  do {
4037  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
4038  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
4039  double desc_sec = desc_ns / nano_seconds_per_second;
4040  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
4041 
4042  // Drop the bps by the percentage of bytes buffered.
4043  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
4044  double mod_bits_per_second = calc_bits_per_second * percent;
4045 
4046  if (prebuffer < desc_sec) {
4047  double search_sec =
4048  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
4049 
4050  // Add 1 so the bits per second should be a little bit greater than file
4051  // datarate.
4052  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
4053  const double min_buffer = 0.0;
4054  double buffer = prebuffer;
4055  double sec_to_download = 0.0;
4056 
4057  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
4058  min_buffer, &buffer, &sec_to_download,
4059  s, cues_start);
4060  if (rv < 0) {
4061  return -1;
4062  } else if (rv == 0) {
4063  bits_per_second = (double)(bps);
4064  break;
4065  }
4066  }
4067 
4068  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4069  } while (desc_end.start_time_ns != -1);
4070  }
4071  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
4072  }
4073  return (int64_t)bandwidth;
4074 }
4075 
4076 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
4077 {
4078  MatroskaDemuxContext *matroska = s->priv_data;
4079  EbmlList *seekhead_list = &matroska->seekhead;
4080  MatroskaSeekhead *seekhead = seekhead_list->elem;
4081  char *buf;
4082  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
4083  int i;
4084  int end = 0;
4085 
4086  // determine cues start and end positions
4087  for (i = 0; i < seekhead_list->nb_elem; i++)
4088  if (seekhead[i].id == MATROSKA_ID_CUES)
4089  break;
4090 
4091  if (i >= seekhead_list->nb_elem) return -1;
4092 
4093  before_pos = avio_tell(matroska->ctx->pb);
4094  cues_start = seekhead[i].pos + matroska->segment_start;
4095  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
4096  // cues_end is computed as cues_start + cues_length + length of the
4097  // Cues element ID (i.e. 4) + EBML length of the Cues element.
4098  // cues_end is inclusive and the above sum is reduced by 1.
4099  uint64_t cues_length, cues_id;
4100  int bytes_read;
4101  bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
4102  if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
4103  return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
4104  bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
4105  if (bytes_read < 0)
4106  return bytes_read;
4107  cues_end = cues_start + 4 + bytes_read + cues_length - 1;
4108  }
4109  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
4110  if (cues_start == -1 || cues_end == -1) return -1;
4111 
4112  // parse the cues
4113  matroska_parse_cues(matroska);
4114 
4115  // cues start
4116  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
4117 
4118  // cues end
4119  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
4120 
4121  // if the file has cues at the start, fix up the init range so that
4122  // it does not include it
4123  if (cues_start <= init_range)
4124  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
4125 
4126  // bandwidth
4127  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
4128  if (bandwidth < 0) return -1;
4129  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
4130 
4131  // check if all clusters start with key frames
4133 
4134  // store cue point timestamps as a comma separated list for checking subsegment alignment in
4135  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
4136  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
4137  if (!buf) return -1;
4138  strcpy(buf, "");
4139  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
4140  int ret = snprintf(buf + end, 20,
4141  "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
4142  i != s->streams[0]->nb_index_entries - 1 ? "," : "");
4143  if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
4144  av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
4145  av_free(buf);
4146  return AVERROR_INVALIDDATA;
4147  }
4148  end += ret;
4149  }
4150  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
4151  av_free(buf);
4152 
4153  return 0;
4154 }
4155 
4157 {
4158  char *buf;
4159  int ret = matroska_read_header(s);
4160  int64_t init_range;
4161  MatroskaTrack *tracks;
4162  MatroskaDemuxContext *matroska = s->priv_data;
4163  if (ret) {
4164  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4165  return -1;
4166  }
4167  if (!s->nb_streams) {
4169  av_log(s, AV_LOG_ERROR, "No streams found\n");
4170  return AVERROR_INVALIDDATA;
4171  }
4172 
4173  if (!matroska->is_live) {
4174  buf = av_asprintf("%g", matroska->duration);
4175  if (!buf) return AVERROR(ENOMEM);
4176  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4177  av_free(buf);
4178 
4179  // initialization range
4180  // 5 is the offset of Cluster ID.
4181  init_range = avio_tell(s->pb) - 5;
4182  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4183  }
4184 
4185  // basename of the file
4186  buf = strrchr(s->url, '/');
4187  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4188 
4189  // track number
4190  tracks = matroska->tracks.elem;
4191  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4192 
4193  // parse the cues and populate Cue related fields
4194  if (!matroska->is_live) {
4195  ret = webm_dash_manifest_cues(s, init_range);
4196  if (ret < 0) {
4197  av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4198  return ret;
4199  }
4200  }
4201 
4202  // use the bandwidth from the command line if it was provided
4203  if (matroska->bandwidth > 0) {
4205  matroska->bandwidth, 0);
4206  }
4207  return 0;
4208 }
4209 
4211 {
4212  return AVERROR_EOF;
4213 }
4214 
4215 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4216 static const AVOption options[] = {
4217  { "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 },
4218  { "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 },
4219  { NULL },
4220 };
4221 
4222 static const AVClass webm_dash_class = {
4223  .class_name = "WebM DASH Manifest demuxer",
4224  .item_name = av_default_item_name,
4225  .option = options,
4226  .version = LIBAVUTIL_VERSION_INT,
4227 };
4228 
4230  .name = "matroska,webm",
4231  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4232  .extensions = "mkv,mk3d,mka,mks",
4233  .priv_data_size = sizeof(MatroskaDemuxContext),
4239  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4240 };
4241 
4243  .name = "webm_dash_manifest",
4244  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4245  .priv_data_size = sizeof(MatroskaDemuxContext),
4249  .priv_class = &webm_dash_class,
4250 };
int32_t pitch
Rotation around the right vector [-90, 90].
Definition: spherical.h:127
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
const char * s
Definition: matroskadec.c:106
#define MATROSKA_ID_VIDEOPROJECTIONPOSEYAW
Definition: matroska.h:159
AVSphericalMapping * av_spherical_alloc(size_t *size)
Allocate a AVSphericalVideo structure and initialize its fields to default values.
Definition: spherical.c:24
uint64_t codec_delay_in_track_tb
Definition: matroskadec.c:246
enum AVChromaLocation chroma_location
Definition: avcodec.h:4047
#define AV_DISPOSITION_METADATA
Definition: avformat.h:863
#define NULL
Definition: coverity.c:32
MatroskaBlock block
Definition: matroskadec.c:327
static EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:650
#define MATROSKA_ID_BLOCKADDID
Definition: matroska.h:230
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:104
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:4038
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:472
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:3109
Bytestream IO Context.
Definition: avio.h:161
enum AVColorTransferCharacteristic color_trc
Definition: avcodec.h:4045
#define MATROSKA_ID_VIDEOFLAGINTERLACED
Definition: matroska.h:121
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define MATROSKA_ID_VIDEOCOLOR_GX
Definition: matroska.h:147
uint64_t seek_preroll
Definition: matroskadec.c:240
const char *const ff_matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT]
Definition: matroska.c:165
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1739
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1340
uint64_t type
Definition: matroskadec.c:231
unsigned MaxCLL
Max content light level (cd/m^2).
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:101
static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:4210
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2966
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
uint64_t version
Definition: matroskadec.c:124
AVOption.
Definition: opt.h:246
static EbmlSyntax matroska_blockmore[]
Definition: matroskadec.c:708
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:4229
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
static int is_keyframe(NalUnitType naltype)
Definition: libx265.c:52
int ff_packet_list_put(AVPacketList **head, AVPacketList **tail, AVPacket *pkt, int flags)
Append an AVPacket to the list.
Definition: utils.c:447
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:2039
AVPacketList * queue
Definition: matroskadec.c:365
#define MATROSKA_ID_VIDEOPROJECTIONPOSEROLL
Definition: matroska.h:161
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:192
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3131
#define MATROSKA_ID_CODECPRIVATE
Definition: matroska.h:89
const unsigned char ff_sipr_subpk_size[4]
Definition: rmsipr.c:25
#define MATROSKA_ID_TAGTARGETS_TYPE
Definition: matroska.h:210
uint64_t display_unit
Definition: matroskadec.c:193
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static EbmlSyntax matroska_track_video[19]
Definition: matroskadec.c:396
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
#define INITIALIZATION_RANGE
Definition: matroska.h:371
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1497
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:1040
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3862
else temp
Definition: vf_mcdeint.c:256
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4892
int64_t pos
Definition: avformat.h:810
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:173
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:167
uint64_t chapteruid
Definition: matroskadec.c:297
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2513
static av_always_inline float av_int2float(uint32_t i)
Reinterpret a 32-bit integer as a float.
Definition: intfloat.h:40
#define MATROSKA_ID_TRACKFLAGDEFAULT
Definition: matroska.h:99
uint64_t additional_id
Definition: matroskadec.c:321
EbmlList tag
Definition: matroskadec.c:303
uint64_t uid
Definition: matroskadec.c:230
int64_t data_offset
offset of the first packet
Definition: internal.h:82
static EbmlSyntax matroska_segments[]
Definition: matroskadec.c:703
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
channels
Definition: aptx.c:30
MatroskaCluster current_cluster
Definition: matroskadec.c:381
uint32_t fourcc
Definition: vaapi_decode.c:238
enum AVCodecID codec_id
Definition: qsv.c:77
Video represents a portion of a sphere mapped on a flat surface using equirectangular projection...
Definition: spherical.h:72
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
AVRational white_point[2]
CIE 1931 xy chromaticity coords of white point.
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
#define MATROSKA_ID_TAGTARGETS_ATTACHUID
Definition: matroska.h:214
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:882
int size
Definition: avcodec.h:1478
static EbmlSyntax matroska_track_video_projection[]
Definition: matroskadec.c:463
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:225
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1110
MatroskaTrackVideoProjection projection
Definition: matroskadec.c:199
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1811
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:237
uint64_t flag_forced
Definition: matroskadec.c:239
int av_log2(unsigned v)
Definition: intmath.c:26
uint64_t max_size
Definition: matroskadec.c:125
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:213
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
GLint GLenum type
Definition: opengl_enc.c:104
uint64_t flag_default
Definition: matroskadec.c:238
#define MATROSKA_ID_VIDEOCOLOR_RX
Definition: matroska.h:145
Video represents a sphere mapped on a flat surface using equirectangular projection.
Definition: spherical.h:56
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:125
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:168
char * name
Definition: matroskadec.c:286
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:334
int has_primaries
Flag indicating whether the display primaries (and white point) are set.
const char * key
int version
Definition: avisynth_c.h:858
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
static EbmlSyntax matroska_index[2]
Definition: matroskadec.c:396
discard all
Definition: avcodec.h:811
#define MATROSKA_ID_VIDEOPROJECTIONTYPE
Definition: matroska.h:157
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:343
static EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:494
static AVPacket pkt
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:196
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX
Definition: matroska.h:153
static int ebml_read_binary(AVIOContext *pb, int length, int64_t pos, EbmlBin *bin)
Definition: matroskadec.c:979
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:788
MatroskaTrackAudio audio
Definition: matroskadec.c:242
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
#define MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ
Definition: matroska.h:135
uint64_t duration
Definition: matroskadec.c:317
#define src
Definition: vp8dsp.c:254
const struct EbmlSyntax * n
Definition: matroskadec.c:107
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:260
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
#define MATROSKA_ID_CLUSTERTIMECODE
Definition: matroska.h:224
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
#define MATROSKA_ID_ENCODINGENCALGO
Definition: matroska.h:180
static EbmlSyntax matroska_attachment[]
Definition: matroskadec.c:583
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:253
enum AVColorSpace color_space
Definition: avcodec.h:4046
#define MATROSKA_ID_TRACKCONTENTENCODINGS
Definition: matroska.h:105
int frame_size
Audio only.
Definition: avcodec.h:4078
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1366
#define AV_LZO_OUTPUT_FULL
decoded data did not fit into output buffer
Definition: lzo.h:39
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:4593
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:243
Format I/O context.
Definition: avformat.h:1358
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:289
UID uid
Definition: mxfenc.c:2214
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:1953
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:106
#define MATROSKA_ID_CODECDOWNLOADURL
Definition: matroska.h:92
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
int64_t end_timecode
Definition: matroskadec.c:249
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:4156
static EbmlSyntax matroska_mastering_meta[]
Definition: matroskadec.c:431
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
Definition: matroskadec.c:916
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
void ff_reduce_index(AVFormatContext *s, int stream_index)
Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by dis...
Definition: utils.c:1967
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1491
Public dictionary API.
int avpriv_dict_set_timestamp(AVDictionary **dict, const char *key, int64_t timestamp)
Set a dictionary value to an ISO-8601 compliant timestamp string.
Definition: dict.c:258
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:247
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1127
uint64_t pixel_height
Definition: matroskadec.c:191
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:372
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60