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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"
42 #include "libavutil/mastering_display_metadata.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
45 #include "libavutil/time_internal.h"
46 
47 #include "libavcodec/bytestream.h"
48 #include "libavcodec/flac.h"
49 #include "libavcodec/mpeg4audio.h"
50 
51 #include "avformat.h"
52 #include "avio_internal.h"
53 #include "internal.h"
54 #include "isom.h"
55 #include "matroska.h"
56 #include "oggdec.h"
57 /* For ff_codec_get_id(). */
58 #include "riff.h"
59 #include "rmsipr.h"
60 
61 #if CONFIG_BZLIB
62 #include <bzlib.h>
63 #endif
64 #if CONFIG_ZLIB
65 #include <zlib.h>
66 #endif
67 
68 #include "qtpalette.h"
69 
70 typedef enum {
71  EBML_NONE,
72  EBML_UINT,
73  EBML_FLOAT,
74  EBML_STR,
75  EBML_UTF8,
76  EBML_BIN,
77  EBML_NEST,
78  EBML_LEVEL1,
79  EBML_PASS,
80  EBML_STOP,
81  EBML_SINT,
82  EBML_TYPE_COUNT
83 } EbmlType;
84 
85 typedef const struct EbmlSyntax {
86  uint32_t id;
87  EbmlType type;
88  int list_elem_size;
89  int data_offset;
90  union {
91  uint64_t u;
92  double f;
93  const char *s;
94  const struct EbmlSyntax *n;
95  } def;
96 } EbmlSyntax;
97 
98 typedef struct EbmlList {
99  int nb_elem;
100  void *elem;
101 } EbmlList;
102 
103 typedef struct EbmlBin {
104  int size;
105  uint8_t *data;
106  int64_t pos;
107 } EbmlBin;
108 
109 typedef struct Ebml {
110  uint64_t version;
111  uint64_t max_size;
112  uint64_t id_length;
113  char *doctype;
114  uint64_t doctype_version;
115 } Ebml;
116 
117 typedef struct MatroskaTrackCompression {
118  uint64_t algo;
119  EbmlBin settings;
120 } MatroskaTrackCompression;
121 
122 typedef struct MatroskaTrackEncryption {
123  uint64_t algo;
124  EbmlBin key_id;
125 } MatroskaTrackEncryption;
126 
127 typedef struct MatroskaTrackEncoding {
128  uint64_t scope;
129  uint64_t type;
130  MatroskaTrackCompression compression;
131  MatroskaTrackEncryption encryption;
132 } MatroskaTrackEncoding;
133 
134 typedef struct MatroskaMasteringMeta {
135  double r_x;
136  double r_y;
137  double g_x;
138  double g_y;
139  double b_x;
140  double b_y;
141  double white_x;
142  double white_y;
143  double max_luminance;
144  double min_luminance;
145 } MatroskaMasteringMeta;
146 
147 typedef struct MatroskaTrackVideoColor {
148  uint64_t matrix_coefficients;
149  uint64_t bits_per_channel;
150  uint64_t chroma_sub_horz;
151  uint64_t chroma_sub_vert;
152  uint64_t cb_sub_horz;
153  uint64_t cb_sub_vert;
154  uint64_t chroma_siting_horz;
155  uint64_t chroma_siting_vert;
156  uint64_t range;
157  uint64_t transfer_characteristics;
158  uint64_t primaries;
159  uint64_t max_cll;
160  uint64_t max_fall;
161  MatroskaMasteringMeta mastering_meta;
162 } MatroskaTrackVideoColor;
163 
164 typedef struct MatroskaTrackVideo {
165  double frame_rate;
166  uint64_t display_width;
167  uint64_t display_height;
168  uint64_t pixel_width;
169  uint64_t pixel_height;
170  EbmlBin color_space;
171  uint64_t display_unit;
172  uint64_t interlaced;
173  uint64_t field_order;
174  uint64_t stereo_mode;
175  uint64_t alpha_mode;
176  MatroskaTrackVideoColor color;
177 } MatroskaTrackVideo;
178 
179 typedef struct MatroskaTrackAudio {
180  double samplerate;
181  double out_samplerate;
182  uint64_t bitdepth;
183  uint64_t channels;
184 
185  /* real audio header (extracted from extradata) */
186  int coded_framesize;
187  int sub_packet_h;
188  int frame_size;
189  int sub_packet_size;
190  int sub_packet_cnt;
191  int pkt_cnt;
192  uint64_t buf_timecode;
193  uint8_t *buf;
194 } MatroskaTrackAudio;
195 
196 typedef struct MatroskaTrackPlane {
197  uint64_t uid;
198  uint64_t type;
199 } MatroskaTrackPlane;
200 
201 typedef struct MatroskaTrackOperation {
202  EbmlList combine_planes;
203 } MatroskaTrackOperation;
204 
205 typedef struct MatroskaTrack {
206  uint64_t num;
207  uint64_t uid;
208  uint64_t type;
209  char *name;
210  char *codec_id;
211  EbmlBin codec_priv;
212  char *language;
213  double time_scale;
214  uint64_t default_duration;
215  uint64_t flag_default;
216  uint64_t flag_forced;
217  uint64_t seek_preroll;
218  MatroskaTrackVideo video;
219  MatroskaTrackAudio audio;
220  MatroskaTrackOperation operation;
221  EbmlList encodings;
222  uint64_t codec_delay;
223  uint64_t codec_delay_in_track_tb;
224 
225  AVStream *stream;
226  int64_t end_timecode;
227  int ms_compat;
228  uint64_t max_block_additional_id;
229 
230  uint32_t palette[AVPALETTE_COUNT];
231  int has_palette;
232 } MatroskaTrack;
233 
234 typedef struct MatroskaAttachment {
235  uint64_t uid;
236  char *filename;
237  char *mime;
238  EbmlBin bin;
239 
240  AVStream *stream;
241 } MatroskaAttachment;
242 
243 typedef struct MatroskaChapter {
244  uint64_t start;
245  uint64_t end;
246  uint64_t uid;
247  char *title;
248 
249  AVChapter *chapter;
250 } MatroskaChapter;
251 
252 typedef struct MatroskaIndexPos {
253  uint64_t track;
254  uint64_t pos;
255 } MatroskaIndexPos;
256 
257 typedef struct MatroskaIndex {
258  uint64_t time;
259  EbmlList pos;
260 } MatroskaIndex;
261 
262 typedef struct MatroskaTag {
263  char *name;
264  char *string;
265  char *lang;
266  uint64_t def;
267  EbmlList sub;
268 } MatroskaTag;
269 
270 typedef struct MatroskaTagTarget {
271  char *type;
272  uint64_t typevalue;
273  uint64_t trackuid;
274  uint64_t chapteruid;
275  uint64_t attachuid;
276 } MatroskaTagTarget;
277 
278 typedef struct MatroskaTags {
279  MatroskaTagTarget target;
280  EbmlList tag;
281 } MatroskaTags;
282 
283 typedef struct MatroskaSeekhead {
284  uint64_t id;
285  uint64_t pos;
286 } MatroskaSeekhead;
287 
288 typedef struct MatroskaLevel {
289  uint64_t start;
290  uint64_t length;
291 } MatroskaLevel;
292 
293 typedef struct MatroskaCluster {
294  uint64_t timecode;
295  EbmlList blocks;
296 } MatroskaCluster;
297 
298 typedef struct MatroskaLevel1Element {
299  uint64_t id;
300  uint64_t pos;
301  int parsed;
302 } MatroskaLevel1Element;
303 
304 typedef struct MatroskaDemuxContext {
305  const AVClass *class;
306  AVFormatContext *ctx;
307 
308  /* EBML stuff */
309  int num_levels;
310  MatroskaLevel levels[EBML_MAX_DEPTH];
311  int level_up;
312  uint32_t current_id;
313 
314  uint64_t time_scale;
315  double duration;
316  char *title;
317  char *muxingapp;
318  EbmlBin date_utc;
319  EbmlList tracks;
320  EbmlList attachments;
321  EbmlList chapters;
322  EbmlList index;
323  EbmlList tags;
324  EbmlList seekhead;
325 
326  /* byte position of the segment inside the stream */
327  int64_t segment_start;
328 
329  /* the packet queue */
330  AVPacket **packets;
331  int num_packets;
332  AVPacket *prev_pkt;
333 
334  int done;
335 
336  /* What to skip before effectively reading a packet. */
337  int skip_to_keyframe;
338  uint64_t skip_to_timecode;
339 
340  /* File has a CUES element, but we defer parsing until it is needed. */
341  int cues_parsing_deferred;
342 
343  /* Level1 elements and whether they were read yet */
344  MatroskaLevel1Element level1_elems[64];
345  int num_level1_elems;
346 
347  int current_cluster_num_blocks;
348  int64_t current_cluster_pos;
349  MatroskaCluster current_cluster;
350 
351  /* File has SSA subtitles which prevent incremental cluster parsing. */
352  int contains_ssa;
353 
354  /* WebM DASH Manifest live flag/ */
355  int is_live;
356 } MatroskaDemuxContext;
357 
358 typedef struct MatroskaBlock {
359  uint64_t duration;
360  int64_t reference;
361  uint64_t non_simple;
362  EbmlBin bin;
363  uint64_t additional_id;
364  EbmlBin additional;
365  int64_t discard_padding;
366 } MatroskaBlock;
367 
368 static const EbmlSyntax ebml_header[] = {
369  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
370  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
371  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
372  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
373  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
374  { EBML_ID_EBMLVERSION, EBML_NONE },
375  { EBML_ID_DOCTYPEVERSION, EBML_NONE },
376  { 0 }
377 };
378 
379 static const EbmlSyntax ebml_syntax[] = {
380  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
381  { 0 }
382 };
383 
384 static const EbmlSyntax matroska_info[] = {
385  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
386  { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
387  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
388  { MATROSKA_ID_WRITINGAPP, EBML_NONE },
389  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
390  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
391  { MATROSKA_ID_SEGMENTUID, EBML_NONE },
392  { 0 }
393 };
394 
395 static const EbmlSyntax matroska_mastering_meta[] = {
396  { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
397  { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
398  { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
399  { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
400  { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
401  { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
402  { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
403  { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
404  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
405  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
406  { 0 }
407 };
408 
409 static const EbmlSyntax matroska_track_video_color[] = {
410  { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
411  { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
412  { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
413  { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
414  { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
415  { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
416  { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
417  { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
418  { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
419  { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
420  { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
421  { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
422  { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
423  { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
424  { 0 }
425 };
426 
427 static const EbmlSyntax matroska_track_video[] = {
428  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
429  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
430  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
431  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
432  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
433  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
434  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
435  { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, 0, offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
436  { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
437  { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
438  { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
439  { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
440  { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
441  { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
442  { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
443  { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
444  { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
445  { 0 }
446 };
447 
448 static const EbmlSyntax matroska_track_audio[] = {
449  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
450  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
451  { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
452  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
453  { 0 }
454 };
455 
456 static const EbmlSyntax matroska_track_encoding_compression[] = {
457  { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
458  { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
459  { 0 }
460 };
461 
462 static const EbmlSyntax matroska_track_encoding_encryption[] = {
463  { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
464  { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
465  { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
466  { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
467  { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
468  { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
469  { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
470  { 0 }
471 };
472 static const EbmlSyntax matroska_track_encoding[] = {
473  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
474  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
475  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
476  { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
477  { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
478  { 0 }
479 };
480 
481 static const EbmlSyntax matroska_track_encodings[] = {
482  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
483  { 0 }
484 };
485 
486 static const EbmlSyntax matroska_track_plane[] = {
487  { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
488  { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
489  { 0 }
490 };
491 
492 static const EbmlSyntax matroska_track_combine_planes[] = {
493  { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
494  { 0 }
495 };
496 
497 static const EbmlSyntax matroska_track_operation[] = {
498  { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
499  { 0 }
500 };
501 
502 static const EbmlSyntax matroska_track[] = {
503  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
504  { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
505  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
506  { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
507  { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
508  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
509  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
510  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
511  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
512  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
513  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
514  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
515  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
516  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
517  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
518  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
519  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
520  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
521  { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
522  { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
523  { MATROSKA_ID_CODECNAME, EBML_NONE },
524  { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
525  { MATROSKA_ID_CODECINFOURL, EBML_NONE },
526  { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
527  { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
528  { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
529  { 0 }
530 };
531 
532 static const EbmlSyntax matroska_tracks[] = {
533  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
534  { 0 }
535 };
536 
537 static const EbmlSyntax matroska_attachment[] = {
538  { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
539  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
540  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
541  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
542  { MATROSKA_ID_FILEDESC, EBML_NONE },
543  { 0 }
544 };
545 
546 static const EbmlSyntax matroska_attachments[] = {
547  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
548  { 0 }
549 };
550 
551 static const EbmlSyntax matroska_chapter_display[] = {
552  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
553  { MATROSKA_ID_CHAPLANG, EBML_NONE },
554  { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
555  { 0 }
556 };
557 
558 static const EbmlSyntax matroska_chapter_entry[] = {
559  { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
560  { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
561  { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
562  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
563  { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
564  { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
565  { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
566  { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
567  { 0 }
568 };
569 
570 static const EbmlSyntax matroska_chapter[] = {
571  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
572  { MATROSKA_ID_EDITIONUID, EBML_NONE },
573  { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
574  { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
575  { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
576  { 0 }
577 };
578 
579 static const EbmlSyntax matroska_chapters[] = {
580  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
581  { 0 }
582 };
583 
584 static const EbmlSyntax matroska_index_pos[] = {
585  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
586  { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
587  { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
588  { MATROSKA_ID_CUEDURATION, EBML_NONE },
589  { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
590  { 0 }
591 };
592 
593 static const EbmlSyntax matroska_index_entry[] = {
594  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
595  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
596  { 0 }
597 };
598 
599 static const EbmlSyntax matroska_index[] = {
600  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
601  { 0 }
602 };
603 
604 static const EbmlSyntax matroska_simpletag[] = {
605  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
606  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
607  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
608  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
609  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
610  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
611  { 0 }
612 };
613 
614 static const EbmlSyntax matroska_tagtargets[] = {
615  { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
616  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
617  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
618  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
619  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
620  { 0 }
621 };
622 
623 static const EbmlSyntax matroska_tag[] = {
624  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
625  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
626  { 0 }
627 };
628 
629 static const EbmlSyntax matroska_tags[] = {
630  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
631  { 0 }
632 };
633 
634 static const EbmlSyntax matroska_seekhead_entry[] = {
635  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
636  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
637  { 0 }
638 };
639 
640 static const EbmlSyntax matroska_seekhead[] = {
641  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
642  { 0 }
643 };
644 
645 static const EbmlSyntax matroska_segment[] = {
646  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
647  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
648  { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
649  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
650  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
651  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
652  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
653  { MATROSKA_ID_CLUSTER, EBML_STOP },
654  { 0 }
655 };
656 
657 static const EbmlSyntax matroska_segments[] = {
658  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
659  { 0 }
660 };
661 
662 static const EbmlSyntax matroska_blockmore[] = {
663  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
664  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
665  { 0 }
666 };
667 
668 static const EbmlSyntax matroska_blockadditions[] = {
669  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
670  { 0 }
671 };
672 
673 static const EbmlSyntax matroska_blockgroup[] = {
674  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
675  { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
676  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
677  { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
678  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
679  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
680  { MATROSKA_ID_CODECSTATE, EBML_NONE },
681  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
682  { 0 }
683 };
684 
685 static const EbmlSyntax matroska_cluster[] = {
686  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
687  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
688  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
689  { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
690  { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
691  { 0 }
692 };
693 
694 static const EbmlSyntax matroska_clusters[] = {
695  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
696  { MATROSKA_ID_INFO, EBML_NONE },
697  { MATROSKA_ID_CUES, EBML_NONE },
698  { MATROSKA_ID_TAGS, EBML_NONE },
699  { MATROSKA_ID_SEEKHEAD, EBML_NONE },
700  { 0 }
701 };
702 
703 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
704  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
705  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
706  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
707  { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
708  { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
709  { MATROSKA_ID_INFO, EBML_NONE },
710  { MATROSKA_ID_CUES, EBML_NONE },
711  { MATROSKA_ID_TAGS, EBML_NONE },
712  { MATROSKA_ID_SEEKHEAD, EBML_NONE },
713  { MATROSKA_ID_CLUSTER, EBML_STOP },
714  { 0 }
715 };
716 
717 static const EbmlSyntax matroska_cluster_incremental[] = {
718  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
719  { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
720  { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
721  { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
722  { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
723  { 0 }
724 };
725 
726 static const EbmlSyntax matroska_clusters_incremental[] = {
727  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
728  { MATROSKA_ID_INFO, EBML_NONE },
729  { MATROSKA_ID_CUES, EBML_NONE },
730  { MATROSKA_ID_TAGS, EBML_NONE },
731  { MATROSKA_ID_SEEKHEAD, EBML_NONE },
732  { 0 }
733 };
734 
735 static const char *const matroska_doctypes[] = { "matroska", "webm" };
736 
737 static int matroska_read_close(AVFormatContext *s);
738 
739 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
740 {
741  AVIOContext *pb = matroska->ctx->pb;
742  int64_t ret;
743  uint32_t id;
744  matroska->current_id = 0;
745  matroska->num_levels = 0;
746 
747  /* seek to next position to resync from */
748  if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
749  matroska->done = 1;
750  return ret;
751  }
752 
753  id = avio_rb32(pb);
754 
755  // try to find a toplevel element
756  while (!avio_feof(pb)) {
757  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
758  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
759  id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
760  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
761  matroska->current_id = id;
762  return 0;
763  }
764  id = (id << 8) | avio_r8(pb);
765  }
766 
767  matroska->done = 1;
768  return AVERROR_EOF;
769 }
770 
771 /*
772  * Return: Whether we reached the end of a level in the hierarchy or not.
773  */
774 static int ebml_level_end(MatroskaDemuxContext *matroska)
775 {
776  AVIOContext *pb = matroska->ctx->pb;
777  int64_t pos = avio_tell(pb);
778 
779  if (matroska->num_levels > 0) {
780  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
781  if (pos - level->start >= level->length || matroska->current_id) {
782  matroska->num_levels--;
783  return 1;
784  }
785  }
786  return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
787 }
788 
789 /*
790  * Read: an "EBML number", which is defined as a variable-length
791  * array of bytes. The first byte indicates the length by giving a
792  * number of 0-bits followed by a one. The position of the first
793  * "one" bit inside the first byte indicates the length of this
794  * number.
795  * Returns: number of bytes read, < 0 on error
796  */
797 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
798  int max_size, uint64_t *number)
799 {
800  int read = 1, n = 1;
801  uint64_t total = 0;
802 
803  /* The first byte tells us the length in bytes - avio_r8() can normally
804  * return 0, but since that's not a valid first ebmlID byte, we can
805  * use it safely here to catch EOS. */
806  if (!(total = avio_r8(pb))) {
807  /* we might encounter EOS here */
808  if (!avio_feof(pb)) {
809  int64_t pos = avio_tell(pb);
810  av_log(matroska->ctx, AV_LOG_ERROR,
811  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
812  pos, pos);
813  return pb->error ? pb->error : AVERROR(EIO);
814  }
815  return AVERROR_EOF;
816  }
817 
818  /* get the length of the EBML number */
819  read = 8 - ff_log2_tab[total];
820  if (read > max_size) {
821  int64_t pos = avio_tell(pb) - 1;
822  av_log(matroska->ctx, AV_LOG_ERROR,
823  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
824  (uint8_t) total, pos, pos);
825  return AVERROR_INVALIDDATA;
826  }
827 
828  /* read out length */
829  total ^= 1 << ff_log2_tab[total];
830  while (n++ < read)
831  total = (total << 8) | avio_r8(pb);
832 
833  *number = total;
834 
835  return read;
836 }
837 
838 /**
839  * Read a EBML length value.
840  * This needs special handling for the "unknown length" case which has multiple
841  * encodings.
842  */
843 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
844  uint64_t *number)
845 {
846  int res = ebml_read_num(matroska, pb, 8, number);
847  if (res > 0 && *number + 1 == 1ULL << (7 * res))
848  *number = 0xffffffffffffffULL;
849  return res;
850 }
851 
852 /*
853  * Read the next element as an unsigned int.
854  * 0 is success, < 0 is failure.
855  */
856 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
857 {
858  int n = 0;
859 
860  if (size > 8)
861  return AVERROR_INVALIDDATA;
862 
863  /* big-endian ordering; build up number */
864  *num = 0;
865  while (n++ < size)
866  *num = (*num << 8) | avio_r8(pb);
867 
868  return 0;
869 }
870 
871 /*
872  * Read the next element as a signed int.
873  * 0 is success, < 0 is failure.
874  */
875 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
876 {
877  int n = 1;
878 
879  if (size > 8)
880  return AVERROR_INVALIDDATA;
881 
882  if (size == 0) {
883  *num = 0;
884  } else {
885  *num = sign_extend(avio_r8(pb), 8);
886 
887  /* big-endian ordering; build up number */
888  while (n++ < size)
889  *num = ((uint64_t)*num << 8) | avio_r8(pb);
890  }
891 
892  return 0;
893 }
894 
895 /*
896  * Read the next element as a float.
897  * 0 is success, < 0 is failure.
898  */
899 static int ebml_read_float(AVIOContext *pb, int size, double *num)
900 {
901  if (size == 0)
902  *num = 0;
903  else if (size == 4)
904  *num = av_int2float(avio_rb32(pb));
905  else if (size == 8)
906  *num = av_int2double(avio_rb64(pb));
907  else
908  return AVERROR_INVALIDDATA;
909 
910  return 0;
911 }
912 
913 /*
914  * Read the next element as an ASCII string.
915  * 0 is success, < 0 is failure.
916  */
917 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
918 {
919  char *res;
920 
921  /* EBML strings are usually not 0-terminated, so we allocate one
922  * byte more, read the string and NULL-terminate it ourselves. */
923  if (!(res = av_malloc(size + 1)))
924  return AVERROR(ENOMEM);
925  if (avio_read(pb, (uint8_t *) res, size) != size) {
926  av_free(res);
927  return AVERROR(EIO);
928  }
929  (res)[size] = '\0';
930  av_free(*str);
931  *str = res;
932 
933  return 0;
934 }
935 
936 /*
937  * Read the next element as binary data.
938  * 0 is success, < 0 is failure.
939  */
940 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
941 {
942  av_fast_padded_malloc(&bin->data, &bin->size, length);
943  if (!bin->data)
944  return AVERROR(ENOMEM);
945 
946  bin->size = length;
947  bin->pos = avio_tell(pb);
948  if (avio_read(pb, bin->data, length) != length) {
949  av_freep(&bin->data);
950  bin->size = 0;
951  return AVERROR(EIO);
952  }
953 
954  return 0;
955 }
956 
957 /*
958  * Read the next element, but only the header. The contents
959  * are supposed to be sub-elements which can be read separately.
960  * 0 is success, < 0 is failure.
961  */
962 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
963 {
964  AVIOContext *pb = matroska->ctx->pb;
965  MatroskaLevel *level;
966 
967  if (matroska->num_levels >= EBML_MAX_DEPTH) {
968  av_log(matroska->ctx, AV_LOG_ERROR,
969  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
970  return AVERROR(ENOSYS);
971  }
972 
973  level = &matroska->levels[matroska->num_levels++];
974  level->start = avio_tell(pb);
975  level->length = length;
976 
977  return 0;
978 }
979 
980 /*
981  * Read signed/unsigned "EBML" numbers.
982  * Return: number of bytes processed, < 0 on error
983  */
984 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
985  uint8_t *data, uint32_t size, uint64_t *num)
986 {
987  AVIOContext pb;
988  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
989  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
990 }
991 
992 /*
993  * Same as above, but signed.
994  */
995 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
996  uint8_t *data, uint32_t size, int64_t *num)
997 {
998  uint64_t unum;
999  int res;
1000 
1001  /* read as unsigned number first */
1002  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1003  return res;
1004 
1005  /* make signed (weird way) */
1006  *num = unum - ((1LL << (7 * res - 1)) - 1);
1007 
1008  return res;
1009 }
1010 
1011 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1012  EbmlSyntax *syntax, void *data);
1013 
1014 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1015  uint32_t id, void *data)
1016 {
1017  int i;
1018  for (i = 0; syntax[i].id; i++)
1019  if (id == syntax[i].id)
1020  break;
1021  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1022  matroska->num_levels > 0 &&
1023  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1024  return 0; // we reached the end of an unknown size cluster
1025  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1026  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1027  }
1028  return ebml_parse_elem(matroska, &syntax[i], data);
1029 }
1030 
1031 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1032  void *data)
1033 {
1034  if (!matroska->current_id) {
1035  uint64_t id;
1036  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1037  if (res < 0) {
1038  // in live mode, finish parsing if EOF is reached.
1039  return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1040  res == AVERROR_EOF) ? 1 : res;
1041  }
1042  matroska->current_id = id | 1 << 7 * res;
1043  }
1044  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1045 }
1046 
1047 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1048  void *data)
1049 {
1050  int i, res = 0;
1051 
1052  for (i = 0; syntax[i].id; i++)
1053  switch (syntax[i].type) {
1054  case EBML_UINT:
1055  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1056  break;
1057  case EBML_FLOAT:
1058  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1059  break;
1060  case EBML_STR:
1061  case EBML_UTF8:
1062  // the default may be NULL
1063  if (syntax[i].def.s) {
1064  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1065  *dst = av_strdup(syntax[i].def.s);
1066  if (!*dst)
1067  return AVERROR(ENOMEM);
1068  }
1069  break;
1070  }
1071 
1072  while (!res && !ebml_level_end(matroska))
1073  res = ebml_parse(matroska, syntax, data);
1074 
1075  return res;
1076 }
1077 
1078 static int is_ebml_id_valid(uint32_t id)
1079 {
1080  // Due to endian nonsense in Matroska, the highest byte with any bits set
1081  // will contain the leading length bit. This bit in turn identifies the
1082  // total byte length of the element by its position within the byte.
1083  unsigned int bits = av_log2(id);
1084  return id && (bits + 7) / 8 == (8 - bits % 8);
1085 }
1086 
1087 /*
1088  * Allocate and return the entry for the level1 element with the given ID. If
1089  * an entry already exists, return the existing entry.
1090  */
1091 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1092  uint32_t id)
1093 {
1094  int i;
1095  MatroskaLevel1Element *elem;
1096 
1097  if (!is_ebml_id_valid(id))
1098  return NULL;
1099 
1100  // Some files link to all clusters; useless.
1101  if (id == MATROSKA_ID_CLUSTER)
1102  return NULL;
1103 
1104  // There can be multiple seekheads.
1105  if (id != MATROSKA_ID_SEEKHEAD) {
1106  for (i = 0; i < matroska->num_level1_elems; i++) {
1107  if (matroska->level1_elems[i].id == id)
1108  return &matroska->level1_elems[i];
1109  }
1110  }
1111 
1112  // Only a completely broken file would have more elements.
1113  // It also provides a low-effort way to escape from circular seekheads
1114  // (every iteration will add a level1 entry).
1115  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1116  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1117  return NULL;
1118  }
1119 
1120  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1121  *elem = (MatroskaLevel1Element){.id = id};
1122 
1123  return elem;
1124 }
1125 
1126 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1127  EbmlSyntax *syntax, void *data)
1128 {
1129  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1130  [EBML_UINT] = 8,
1131  [EBML_FLOAT] = 8,
1132  // max. 16 MB for strings
1133  [EBML_STR] = 0x1000000,
1134  [EBML_UTF8] = 0x1000000,
1135  // max. 256 MB for binary data
1136  [EBML_BIN] = 0x10000000,
1137  // no limits for anything else
1138  };
1139  AVIOContext *pb = matroska->ctx->pb;
1140  uint32_t id = syntax->id;
1141  uint64_t length;
1142  int res;
1143  void *newelem;
1144  MatroskaLevel1Element *level1_elem;
1145 
1146  data = (char *) data + syntax->data_offset;
1147  if (syntax->list_elem_size) {
1148  EbmlList *list = data;
1149  newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1150  if (!newelem)
1151  return AVERROR(ENOMEM);
1152  list->elem = newelem;
1153  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1154  memset(data, 0, syntax->list_elem_size);
1155  list->nb_elem++;
1156  }
1157 
1158  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1159  matroska->current_id = 0;
1160  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1161  return res;
1162  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1163  av_log(matroska->ctx, AV_LOG_ERROR,
1164  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1165  length, max_lengths[syntax->type], syntax->type);
1166  return AVERROR_INVALIDDATA;
1167  }
1168  }
1169 
1170  switch (syntax->type) {
1171  case EBML_UINT:
1172  res = ebml_read_uint(pb, length, data);
1173  break;
1174  case EBML_SINT:
1175  res = ebml_read_sint(pb, length, data);
1176  break;
1177  case EBML_FLOAT:
1178  res = ebml_read_float(pb, length, data);
1179  break;
1180  case EBML_STR:
1181  case EBML_UTF8:
1182  res = ebml_read_ascii(pb, length, data);
1183  break;
1184  case EBML_BIN:
1185  res = ebml_read_binary(pb, length, data);
1186  break;
1187  case EBML_LEVEL1:
1188  case EBML_NEST:
1189  if ((res = ebml_read_master(matroska, length)) < 0)
1190  return res;
1191  if (id == MATROSKA_ID_SEGMENT)
1192  matroska->segment_start = avio_tell(matroska->ctx->pb);
1193  if (id == MATROSKA_ID_CUES)
1194  matroska->cues_parsing_deferred = 0;
1195  if (syntax->type == EBML_LEVEL1 &&
1196  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1197  if (level1_elem->parsed)
1198  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1199  level1_elem->parsed = 1;
1200  }
1201  return ebml_parse_nest(matroska, syntax->def.n, data);
1202  case EBML_PASS:
1203  return ebml_parse_id(matroska, syntax->def.n, id, data);
1204  case EBML_STOP:
1205  return 1;
1206  default:
1207  if (ffio_limit(pb, length) != length)
1208  return AVERROR(EIO);
1209  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1210  }
1211  if (res == AVERROR_INVALIDDATA)
1212  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1213  else if (res == AVERROR(EIO))
1214  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1215  return res;
1216 }
1217 
1218 static void ebml_free(EbmlSyntax *syntax, void *data)
1219 {
1220  int i, j;
1221  for (i = 0; syntax[i].id; i++) {
1222  void *data_off = (char *) data + syntax[i].data_offset;
1223  switch (syntax[i].type) {
1224  case EBML_STR:
1225  case EBML_UTF8:
1226  av_freep(data_off);
1227  break;
1228  case EBML_BIN:
1229  av_freep(&((EbmlBin *) data_off)->data);
1230  break;
1231  case EBML_LEVEL1:
1232  case EBML_NEST:
1233  if (syntax[i].list_elem_size) {
1234  EbmlList *list = data_off;
1235  char *ptr = list->elem;
1236  for (j = 0; j < list->nb_elem;
1237  j++, ptr += syntax[i].list_elem_size)
1238  ebml_free(syntax[i].def.n, ptr);
1239  av_freep(&list->elem);
1240  } else
1241  ebml_free(syntax[i].def.n, data_off);
1242  default:
1243  break;
1244  }
1245  }
1246 }
1247 
1248 /*
1249  * Autodetecting...
1250  */
1251 static int matroska_probe(AVProbeData *p)
1252 {
1253  uint64_t total = 0;
1254  int len_mask = 0x80, size = 1, n = 1, i;
1255 
1256  /* EBML header? */
1257  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1258  return 0;
1259 
1260  /* length of header */
1261  total = p->buf[4];
1262  while (size <= 8 && !(total & len_mask)) {
1263  size++;
1264  len_mask >>= 1;
1265  }
1266  if (size > 8)
1267  return 0;
1268  total &= (len_mask - 1);
1269  while (n < size)
1270  total = (total << 8) | p->buf[4 + n++];
1271 
1272  /* Does the probe data contain the whole header? */
1273  if (p->buf_size < 4 + size + total)
1274  return 0;
1275 
1276  /* The header should contain a known document type. For now,
1277  * we don't parse the whole header but simply check for the
1278  * availability of that array of characters inside the header.
1279  * Not fully fool-proof, but good enough. */
1280  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1281  size_t probelen = strlen(matroska_doctypes[i]);
1282  if (total < probelen)
1283  continue;
1284  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1285  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1286  return AVPROBE_SCORE_MAX;
1287  }
1288 
1289  // probably valid EBML header but no recognized doctype
1290  return AVPROBE_SCORE_EXTENSION;
1291 }
1292 
1293 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1294  int num)
1295 {
1296  MatroskaTrack *tracks = matroska->tracks.elem;
1297  int i;
1298 
1299  for (i = 0; i < matroska->tracks.nb_elem; i++)
1300  if (tracks[i].num == num)
1301  return &tracks[i];
1302 
1303  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1304  return NULL;
1305 }
1306 
1307 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1308  MatroskaTrack *track)
1309 {
1310  MatroskaTrackEncoding *encodings = track->encodings.elem;
1311  uint8_t *data = *buf;
1312  int isize = *buf_size;
1313  uint8_t *pkt_data = NULL;
1314  uint8_t av_unused *newpktdata;
1315  int pkt_size = isize;
1316  int result = 0;
1317  int olen;
1318 
1319  if (pkt_size >= 10000000U)
1320  return AVERROR_INVALIDDATA;
1321 
1322  switch (encodings[0].compression.algo) {
1323  case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1324  {
1325  int header_size = encodings[0].compression.settings.size;
1326  uint8_t *header = encodings[0].compression.settings.data;
1327 
1328  if (header_size && !header) {
1329  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1330  return -1;
1331  }
1332 
1333  if (!header_size)
1334  return 0;
1335 
1336  pkt_size = isize + header_size;
1337  pkt_data = av_malloc(pkt_size);
1338  if (!pkt_data)
1339  return AVERROR(ENOMEM);
1340 
1341  memcpy(pkt_data, header, header_size);
1342  memcpy(pkt_data + header_size, data, isize);
1343  break;
1344  }
1345 #if CONFIG_LZO
1346  case MATROSKA_TRACK_ENCODING_COMP_LZO:
1347  do {
1348  olen = pkt_size *= 3;
1349  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1350  if (!newpktdata) {
1351  result = AVERROR(ENOMEM);
1352  goto failed;
1353  }
1354  pkt_data = newpktdata;
1355  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1356  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1357  if (result) {
1358  result = AVERROR_INVALIDDATA;
1359  goto failed;
1360  }
1361  pkt_size -= olen;
1362  break;
1363 #endif
1364 #if CONFIG_ZLIB
1365  case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1366  {
1367  z_stream zstream = { 0 };
1368  if (inflateInit(&zstream) != Z_OK)
1369  return -1;
1370  zstream.next_in = data;
1371  zstream.avail_in = isize;
1372  do {
1373  pkt_size *= 3;
1374  newpktdata = av_realloc(pkt_data, pkt_size);
1375  if (!newpktdata) {
1376  inflateEnd(&zstream);
1377  result = AVERROR(ENOMEM);
1378  goto failed;
1379  }
1380  pkt_data = newpktdata;
1381  zstream.avail_out = pkt_size - zstream.total_out;
1382  zstream.next_out = pkt_data + zstream.total_out;
1383  result = inflate(&zstream, Z_NO_FLUSH);
1384  } while (result == Z_OK && pkt_size < 10000000);
1385  pkt_size = zstream.total_out;
1386  inflateEnd(&zstream);
1387  if (result != Z_STREAM_END) {
1388  if (result == Z_MEM_ERROR)
1389  result = AVERROR(ENOMEM);
1390  else
1391  result = AVERROR_INVALIDDATA;
1392  goto failed;
1393  }
1394  break;
1395  }
1396 #endif
1397 #if CONFIG_BZLIB
1398  case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1399  {
1400  bz_stream bzstream = { 0 };
1401  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1402  return -1;
1403  bzstream.next_in = data;
1404  bzstream.avail_in = isize;
1405  do {
1406  pkt_size *= 3;
1407  newpktdata = av_realloc(pkt_data, pkt_size);
1408  if (!newpktdata) {
1409  BZ2_bzDecompressEnd(&bzstream);
1410  result = AVERROR(ENOMEM);
1411  goto failed;
1412  }
1413  pkt_data = newpktdata;
1414  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1415  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1416  result = BZ2_bzDecompress(&bzstream);
1417  } while (result == BZ_OK && pkt_size < 10000000);
1418  pkt_size = bzstream.total_out_lo32;
1419  BZ2_bzDecompressEnd(&bzstream);
1420  if (result != BZ_STREAM_END) {
1421  if (result == BZ_MEM_ERROR)
1422  result = AVERROR(ENOMEM);
1423  else
1424  result = AVERROR_INVALIDDATA;
1425  goto failed;
1426  }
1427  break;
1428  }
1429 #endif
1430  default:
1431  return AVERROR_INVALIDDATA;
1432  }
1433 
1434  *buf = pkt_data;
1435  *buf_size = pkt_size;
1436  return 0;
1437 
1438 failed:
1439  av_free(pkt_data);
1440  return result;
1441 }
1442 
1443 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1444  AVDictionary **metadata, char *prefix)
1445 {
1446  MatroskaTag *tags = list->elem;
1447  char key[1024];
1448  int i;
1449 
1450  for (i = 0; i < list->nb_elem; i++) {
1451  const char *lang = tags[i].lang &&
1452  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1453 
1454  if (!tags[i].name) {
1455  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1456  continue;
1457  }
1458  if (prefix)
1459  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1460  else
1461  av_strlcpy(key, tags[i].name, sizeof(key));
1462  if (tags[i].def || !lang) {
1463  av_dict_set(metadata, key, tags[i].string, 0);
1464  if (tags[i].sub.nb_elem)
1465  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1466  }
1467  if (lang) {
1468  av_strlcat(key, "-", sizeof(key));
1469  av_strlcat(key, lang, sizeof(key));
1470  av_dict_set(metadata, key, tags[i].string, 0);
1471  if (tags[i].sub.nb_elem)
1472  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1473  }
1474  }
1475  ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1476 }
1477 
1478 static void matroska_convert_tags(AVFormatContext *s)
1479 {
1480  MatroskaDemuxContext *matroska = s->priv_data;
1481  MatroskaTags *tags = matroska->tags.elem;
1482  int i, j;
1483 
1484  for (i = 0; i < matroska->tags.nb_elem; i++) {
1485  if (tags[i].target.attachuid) {
1486  MatroskaAttachment *attachment = matroska->attachments.elem;
1487  int found = 0;
1488  for (j = 0; j < matroska->attachments.nb_elem; j++) {
1489  if (attachment[j].uid == tags[i].target.attachuid &&
1490  attachment[j].stream) {
1491  matroska_convert_tag(s, &tags[i].tag,
1492  &attachment[j].stream->metadata, NULL);
1493  found = 1;
1494  }
1495  }
1496  if (!found) {
1497  av_log(NULL, AV_LOG_WARNING,
1498  "The tags at index %d refer to a "
1499  "non-existent attachment %"PRId64".\n",
1500  i, tags[i].target.attachuid);
1501  }
1502  } else if (tags[i].target.chapteruid) {
1503  MatroskaChapter *chapter = matroska->chapters.elem;
1504  int found = 0;
1505  for (j = 0; j < matroska->chapters.nb_elem; j++) {
1506  if (chapter[j].uid == tags[i].target.chapteruid &&
1507  chapter[j].chapter) {
1508  matroska_convert_tag(s, &tags[i].tag,
1509  &chapter[j].chapter->metadata, NULL);
1510  found = 1;
1511  }
1512  }
1513  if (!found) {
1514  av_log(NULL, AV_LOG_WARNING,
1515  "The tags at index %d refer to a non-existent chapter "
1516  "%"PRId64".\n",
1517  i, tags[i].target.chapteruid);
1518  }
1519  } else if (tags[i].target.trackuid) {
1520  MatroskaTrack *track = matroska->tracks.elem;
1521  int found = 0;
1522  for (j = 0; j < matroska->tracks.nb_elem; j++) {
1523  if (track[j].uid == tags[i].target.trackuid &&
1524  track[j].stream) {
1525  matroska_convert_tag(s, &tags[i].tag,
1526  &track[j].stream->metadata, NULL);
1527  found = 1;
1528  }
1529  }
1530  if (!found) {
1531  av_log(NULL, AV_LOG_WARNING,
1532  "The tags at index %d refer to a non-existent track "
1533  "%"PRId64".\n",
1534  i, tags[i].target.trackuid);
1535  }
1536  } else {
1537  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1538  tags[i].target.type);
1539  }
1540  }
1541 }
1542 
1543 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1544  uint64_t pos)
1545 {
1546  uint32_t level_up = matroska->level_up;
1547  uint32_t saved_id = matroska->current_id;
1548  int64_t before_pos = avio_tell(matroska->ctx->pb);
1549  MatroskaLevel level;
1550  int64_t offset;
1551  int ret = 0;
1552 
1553  /* seek */
1554  offset = pos + matroska->segment_start;
1555  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1556  /* We don't want to lose our seekhead level, so we add
1557  * a dummy. This is a crude hack. */
1558  if (matroska->num_levels == EBML_MAX_DEPTH) {
1559  av_log(matroska->ctx, AV_LOG_INFO,
1560  "Max EBML element depth (%d) reached, "
1561  "cannot parse further.\n", EBML_MAX_DEPTH);
1562  ret = AVERROR_INVALIDDATA;
1563  } else {
1564  level.start = 0;
1565  level.length = (uint64_t) -1;
1566  matroska->levels[matroska->num_levels] = level;
1567  matroska->num_levels++;
1568  matroska->current_id = 0;
1569 
1570  ret = ebml_parse(matroska, matroska_segment, matroska);
1571 
1572  /* remove dummy level */
1573  while (matroska->num_levels) {
1574  uint64_t length = matroska->levels[--matroska->num_levels].length;
1575  if (length == (uint64_t) -1)
1576  break;
1577  }
1578  }
1579  }
1580  /* seek back */
1581  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1582  matroska->level_up = level_up;
1583  matroska->current_id = saved_id;
1584 
1585  return ret;
1586 }
1587 
1588 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1589 {
1590  EbmlList *seekhead_list = &matroska->seekhead;
1591  int i;
1592 
1593  // we should not do any seeking in the streaming case
1594  if (!matroska->ctx->pb->seekable)
1595  return;
1596 
1597  for (i = 0; i < seekhead_list->nb_elem; i++) {
1598  MatroskaSeekhead *seekheads = seekhead_list->elem;
1599  uint32_t id = seekheads[i].id;
1600  uint64_t pos = seekheads[i].pos;
1601 
1602  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1603  if (!elem || elem->parsed)
1604  continue;
1605 
1606  elem->pos = pos;
1607 
1608  // defer cues parsing until we actually need cue data.
1609  if (id == MATROSKA_ID_CUES)
1610  continue;
1611 
1612  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1613  // mark index as broken
1614  matroska->cues_parsing_deferred = -1;
1615  break;
1616  }
1617 
1618  elem->parsed = 1;
1619  }
1620 }
1621 
1622 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1623 {
1624  EbmlList *index_list;
1625  MatroskaIndex *index;
1626  uint64_t index_scale = 1;
1627  int i, j;
1628 
1629  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1630  return;
1631 
1632  index_list = &matroska->index;
1633  index = index_list->elem;
1634  if (index_list->nb_elem < 2)
1635  return;
1636  if (index[1].time > 1E14 / matroska->time_scale) {
1637  av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1638  return;
1639  }
1640  for (i = 0; i < index_list->nb_elem; i++) {
1641  EbmlList *pos_list = &index[i].pos;
1642  MatroskaIndexPos *pos = pos_list->elem;
1643  for (j = 0; j < pos_list->nb_elem; j++) {
1644  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1645  pos[j].track);
1646  if (track && track->stream)
1647  av_add_index_entry(track->stream,
1648  pos[j].pos + matroska->segment_start,
1649  index[i].time / index_scale, 0, 0,
1650  AVINDEX_KEYFRAME);
1651  }
1652  }
1653 }
1654 
1655 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1656  int i;
1657 
1658  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1659  return;
1660 
1661  for (i = 0; i < matroska->num_level1_elems; i++) {
1662  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1663  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1664  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1665  matroska->cues_parsing_deferred = -1;
1666  elem->parsed = 1;
1667  break;
1668  }
1669  }
1670 
1671  matroska_add_index_entries(matroska);
1672 }
1673 
1674 static int matroska_aac_profile(char *codec_id)
1675 {
1676  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1677  int profile;
1678 
1679  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1680  if (strstr(codec_id, aac_profiles[profile]))
1681  break;
1682  return profile + 1;
1683 }
1684 
1685 static int matroska_aac_sri(int samplerate)
1686 {
1687  int sri;
1688 
1689  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1690  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1691  break;
1692  return sri;
1693 }
1694 
1695 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1696 {
1697  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1698  avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1699 }
1700 
1701 static int matroska_parse_flac(AVFormatContext *s,
1702  MatroskaTrack *track,
1703  int *offset)
1704 {
1705  AVStream *st = track->stream;
1706  uint8_t *p = track->codec_priv.data;
1707  int size = track->codec_priv.size;
1708 
1709  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1710  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1711  track->codec_priv.size = 0;
1712  return 0;
1713  }
1714  *offset = 8;
1715  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1716 
1717  p += track->codec_priv.size;
1718  size -= track->codec_priv.size;
1719 
1720  /* parse the remaining metadata blocks if present */
1721  while (size >= 4) {
1722  int block_last, block_type, block_size;
1723 
1724  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1725 
1726  p += 4;
1727  size -= 4;
1728  if (block_size > size)
1729  return 0;
1730 
1731  /* check for the channel mask */
1732  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1733  AVDictionary *dict = NULL;
1734  AVDictionaryEntry *chmask;
1735 
1736  ff_vorbis_comment(s, &dict, p, block_size, 0);
1737  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1738  if (chmask) {
1739  uint64_t mask = strtol(chmask->value, NULL, 0);
1740  if (!mask || mask & ~0x3ffffULL) {
1741  av_log(s, AV_LOG_WARNING,
1742  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1743  } else
1744  st->codecpar->channel_layout = mask;
1745  }
1746  av_dict_free(&dict);
1747  }
1748 
1749  p += block_size;
1750  size -= block_size;
1751  }
1752 
1753  return 0;
1754 }
1755 
1756 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1757 {
1758  int major, minor, micro, bttb = 0;
1759 
1760  /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1761  * this function, and fixed in 57.52 */
1762  if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, &micro) == 3)
1763  bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1764 
1765  switch (field_order) {
1766  case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1767  return AV_FIELD_PROGRESSIVE;
1768  case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1769  return AV_FIELD_UNKNOWN;
1770  case MATROSKA_VIDEO_FIELDORDER_TT:
1771  return AV_FIELD_TT;
1772  case MATROSKA_VIDEO_FIELDORDER_BB:
1773  return AV_FIELD_BB;
1774  case MATROSKA_VIDEO_FIELDORDER_BT:
1775  return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1776  case MATROSKA_VIDEO_FIELDORDER_TB:
1777  return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1778  default:
1779  return AV_FIELD_UNKNOWN;
1780  }
1781 }
1782 
1783 static void mkv_stereo_mode_display_mul(int stereo_mode,
1784  int *h_width, int *h_height)
1785 {
1786  switch (stereo_mode) {
1787  case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1788  case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1789  case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1790  case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1791  case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1792  break;
1793  case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1794  case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1795  case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1796  case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1797  *h_width = 2;
1798  break;
1799  case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1800  case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1801  case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1802  case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1803  *h_height = 2;
1804  break;
1805  }
1806 }
1807 
1808 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1809  const MatroskaMasteringMeta* mastering_meta =
1810  &track->video.color.mastering_meta;
1811  // Mastering primaries are CIE 1931 coords, and must be > 0.
1812  const int has_mastering_primaries =
1813  mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1814  mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1815  mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1816  mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1817  const int has_mastering_luminance = mastering_meta->max_luminance > 0;
1818 
1819  if (track->video.color.matrix_coefficients != AVCOL_SPC_RESERVED)
1820  st->codecpar->color_space = track->video.color.matrix_coefficients;
1821  if (track->video.color.primaries != AVCOL_PRI_RESERVED &&
1822  track->video.color.primaries != AVCOL_PRI_RESERVED0)
1823  st->codecpar->color_primaries = track->video.color.primaries;
1824  if (track->video.color.transfer_characteristics != AVCOL_TRC_RESERVED &&
1825  track->video.color.transfer_characteristics != AVCOL_TRC_RESERVED0)
1826  st->codecpar->color_trc = track->video.color.transfer_characteristics;
1827  if (track->video.color.range != AVCOL_RANGE_UNSPECIFIED &&
1828  track->video.color.range <= AVCOL_RANGE_JPEG)
1829  st->codecpar->color_range = track->video.color.range;
1830  if (track->video.color.chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1831  track->video.color.chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1832  track->video.color.chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1833  track->video.color.chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1834  st->codecpar->chroma_location =
1835  avcodec_chroma_pos_to_enum((track->video.color.chroma_siting_horz - 1) << 7,
1836  (track->video.color.chroma_siting_vert - 1) << 7);
1837  }
1838 
1839  if (has_mastering_primaries || has_mastering_luminance) {
1840  // Use similar rationals as other standards.
1841  const int chroma_den = 50000;
1842  const int luma_den = 10000;
1843  AVMasteringDisplayMetadata *metadata =
1844  (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1845  st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1846  sizeof(AVMasteringDisplayMetadata));
1847  if (!metadata) {
1848  return AVERROR(ENOMEM);
1849  }
1850  memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1851  if (has_mastering_primaries) {
1852  metadata->display_primaries[0][0] = av_make_q(
1853  round(mastering_meta->r_x * chroma_den), chroma_den);
1854  metadata->display_primaries[0][1] = av_make_q(
1855  round(mastering_meta->r_y * chroma_den), chroma_den);
1856  metadata->display_primaries[1][0] = av_make_q(
1857  round(mastering_meta->g_x * chroma_den), chroma_den);
1858  metadata->display_primaries[1][1] = av_make_q(
1859  round(mastering_meta->g_y * chroma_den), chroma_den);
1860  metadata->display_primaries[2][0] = av_make_q(
1861  round(mastering_meta->b_x * chroma_den), chroma_den);
1862  metadata->display_primaries[2][1] = av_make_q(
1863  round(mastering_meta->b_y * chroma_den), chroma_den);
1864  metadata->white_point[0] = av_make_q(
1865  round(mastering_meta->white_x * chroma_den), chroma_den);
1866  metadata->white_point[1] = av_make_q(
1867  round(mastering_meta->white_y * chroma_den), chroma_den);
1868  metadata->has_primaries = 1;
1869  }
1870  if (has_mastering_luminance) {
1871  metadata->max_luminance = av_make_q(
1872  round(mastering_meta->max_luminance * luma_den), luma_den);
1873  metadata->min_luminance = av_make_q(
1874  round(mastering_meta->min_luminance * luma_den), luma_den);
1875  metadata->has_luminance = 1;
1876  }
1877  }
1878  return 0;
1879 }
1880 
1881 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
1882 {
1883  const AVCodecTag *codec_tags;
1884 
1885  codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
1886  ff_codec_movvideo_tags : ff_codec_movaudio_tags;
1887 
1888  /* Normalize noncompliant private data that starts with the fourcc
1889  * by expanding/shifting the data by 4 bytes and storing the data
1890  * size at the start. */
1891  if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
1892  uint8_t *p = av_realloc(track->codec_priv.data,
1893  track->codec_priv.size + 4);
1894  if (!p)
1895  return AVERROR(ENOMEM);
1896  memmove(p + 4, p, track->codec_priv.size);
1897  track->codec_priv.data = p;
1898  track->codec_priv.size += 4;
1899  AV_WB32(track->codec_priv.data, track->codec_priv.size);
1900  }
1901 
1902  *fourcc = AV_RL32(track->codec_priv.data + 4);
1903  *codec_id = ff_codec_get_id(codec_tags, *fourcc);
1904 
1905  return 0;
1906 }
1907 
1908 static int matroska_parse_tracks(AVFormatContext *s)
1909 {
1910  MatroskaDemuxContext *matroska = s->priv_data;
1911  MatroskaTrack *tracks = matroska->tracks.elem;
1912  AVStream *st;
1913  int i, j, ret;
1914  int k;
1915 
1916  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1917  MatroskaTrack *track = &tracks[i];
1918  enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1919  EbmlList *encodings_list = &track->encodings;
1920  MatroskaTrackEncoding *encodings = encodings_list->elem;
1921  uint8_t *extradata = NULL;
1922  int extradata_size = 0;
1923  int extradata_offset = 0;
1924  uint32_t fourcc = 0;
1925  AVIOContext b;
1926  char* key_id_base64 = NULL;
1927  int bit_depth = -1;
1928 
1929  /* Apply some sanity checks. */
1930  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1931  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1932  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1933  track->type != MATROSKA_TRACK_TYPE_METADATA) {
1934  av_log(matroska->ctx, AV_LOG_INFO,
1935  "Unknown or unsupported track type %"PRIu64"\n",
1936  track->type);
1937  continue;
1938  }
1939  if (!track->codec_id)
1940  continue;
1941 
1942  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
1943  isnan(track->audio.samplerate)) {
1944  av_log(matroska->ctx, AV_LOG_WARNING,
1945  "Invalid sample rate %f, defaulting to 8000 instead.\n",
1946  track->audio.samplerate);
1947  track->audio.samplerate = 8000;
1948  }
1949 
1950  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1951  if (!track->default_duration && track->video.frame_rate > 0)
1952  track->default_duration = 1000000000 / track->video.frame_rate;
1953  if (track->video.display_width == -1)
1954  track->video.display_width = track->video.pixel_width;
1955  if (track->video.display_height == -1)
1956  track->video.display_height = track->video.pixel_height;
1957  if (track->video.color_space.size == 4)
1958  fourcc = AV_RL32(track->video.color_space.data);
1959  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1960  if (!track->audio.out_samplerate)
1961  track->audio.out_samplerate = track->audio.samplerate;
1962  }
1963  if (encodings_list->nb_elem > 1) {
1964  av_log(matroska->ctx, AV_LOG_ERROR,
1965  "Multiple combined encodings not supported");
1966  } else if (encodings_list->nb_elem == 1) {
1967  if (encodings[0].type) {
1968  if (encodings[0].encryption.key_id.size > 0) {
1969  /* Save the encryption key id to be stored later as a
1970  metadata tag. */
1971  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1972  key_id_base64 = av_malloc(b64_size);
1973  if (key_id_base64 == NULL)
1974  return AVERROR(ENOMEM);
1975 
1976  av_base64_encode(key_id_base64, b64_size,
1977  encodings[0].encryption.key_id.data,
1978  encodings[0].encryption.key_id.size);
1979  } else {
1980  encodings[0].scope = 0;
1981  av_log(matroska->ctx, AV_LOG_ERROR,
1982  "Unsupported encoding type");
1983  }
1984  } else if (
1985 #if CONFIG_ZLIB
1986  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1987 #endif
1988 #if CONFIG_BZLIB
1989  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1990 #endif
1991 #if CONFIG_LZO
1992  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1993 #endif
1994  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
1995  encodings[0].scope = 0;
1996  av_log(matroska->ctx, AV_LOG_ERROR,
1997  "Unsupported encoding type");
1998  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1999  uint8_t *codec_priv = track->codec_priv.data;
2000  int ret = matroska_decode_buffer(&track->codec_priv.data,
2001  &track->codec_priv.size,
2002  track);
2003  if (ret < 0) {
2004  track->codec_priv.data = NULL;
2005  track->codec_priv.size = 0;
2006  av_log(matroska->ctx, AV_LOG_ERROR,
2007  "Failed to decode codec private data\n");
2008  }
2009 
2010  if (codec_priv != track->codec_priv.data)
2011  av_free(codec_priv);
2012  }
2013  }
2014 
2015  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2016  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2017  strlen(ff_mkv_codec_tags[j].str))) {
2018  codec_id = ff_mkv_codec_tags[j].id;
2019  break;
2020  }
2021  }
2022 
2023  st = track->stream = avformat_new_stream(s, NULL);
2024  if (!st) {
2025  av_free(key_id_base64);
2026  return AVERROR(ENOMEM);
2027  }
2028 
2029  if (key_id_base64) {
2030  /* export encryption key id as base64 metadata tag */
2031  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2032  av_freep(&key_id_base64);
2033  }
2034 
2035  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2036  track->codec_priv.size >= 40 &&
2037  track->codec_priv.data) {
2038  track->ms_compat = 1;
2039  bit_depth = AV_RL16(track->codec_priv.data + 14);
2040  fourcc = AV_RL32(track->codec_priv.data + 16);
2041  codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2042  fourcc);
2043  if (!codec_id)
2044  codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2045  fourcc);
2046  extradata_offset = 40;
2047  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2048  track->codec_priv.size >= 14 &&
2049  track->codec_priv.data) {
2050  int ret;
2051  ffio_init_context(&b, track->codec_priv.data,
2052  track->codec_priv.size,
2053  0, NULL, NULL, NULL, NULL);
2054  ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2055  if (ret < 0)
2056  return ret;
2057  codec_id = st->codecpar->codec_id;
2058  fourcc = st->codecpar->codec_tag;
2059  extradata_offset = FFMIN(track->codec_priv.size, 18);
2060  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2061  /* Normally 36, but allow noncompliant private data */
2062  && (track->codec_priv.size >= 32)
2063  && (track->codec_priv.data)) {
2064  uint16_t sample_size;
2065  int ret = get_qt_codec(track, &fourcc, &codec_id);
2066  if (ret < 0)
2067  return ret;
2068  sample_size = AV_RB16(track->codec_priv.data + 26);
2069  if (fourcc == 0) {
2070  if (sample_size == 8) {
2071  fourcc = MKTAG('r','a','w',' ');
2072  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2073  } else if (sample_size == 16) {
2074  fourcc = MKTAG('t','w','o','s');
2075  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2076  }
2077  }
2078  if ((fourcc == MKTAG('t','w','o','s') ||
2079  fourcc == MKTAG('s','o','w','t')) &&
2080  sample_size == 8)
2081  codec_id = AV_CODEC_ID_PCM_S8;
2082  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2083  (track->codec_priv.size >= 21) &&
2084  (track->codec_priv.data)) {
2085  int ret = get_qt_codec(track, &fourcc, &codec_id);
2086  if (ret < 0)
2087  return ret;
2088  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2089  fourcc = MKTAG('S','V','Q','3');
2090  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2091  }
2092  if (codec_id == AV_CODEC_ID_NONE) {
2093  char buf[32];
2094  av_get_codec_tag_string(buf, sizeof(buf), fourcc);
2095  av_log(matroska->ctx, AV_LOG_ERROR,
2096  "mov FourCC not found %s.\n", buf);
2097  }
2098  if (track->codec_priv.size >= 86) {
2099  bit_depth = AV_RB16(track->codec_priv.data + 82);
2100  ffio_init_context(&b, track->codec_priv.data,
2101  track->codec_priv.size,
2102  0, NULL, NULL, NULL, NULL);
2103  if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2104  bit_depth &= 0x1F;
2105  track->has_palette = 1;
2106  }
2107  }
2108  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2109  switch (track->audio.bitdepth) {
2110  case 8:
2111  codec_id = AV_CODEC_ID_PCM_U8;
2112  break;
2113  case 24:
2114  codec_id = AV_CODEC_ID_PCM_S24BE;
2115  break;
2116  case 32:
2117  codec_id = AV_CODEC_ID_PCM_S32BE;
2118  break;
2119  }
2120  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2121  switch (track->audio.bitdepth) {
2122  case 8:
2123  codec_id = AV_CODEC_ID_PCM_U8;
2124  break;
2125  case 24:
2126  codec_id = AV_CODEC_ID_PCM_S24LE;
2127  break;
2128  case 32:
2129  codec_id = AV_CODEC_ID_PCM_S32LE;
2130  break;
2131  }
2132  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2133  track->audio.bitdepth == 64) {
2134  codec_id = AV_CODEC_ID_PCM_F64LE;
2135  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2136  int profile = matroska_aac_profile(track->codec_id);
2137  int sri = matroska_aac_sri(track->audio.samplerate);
2138  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2139  if (!extradata)
2140  return AVERROR(ENOMEM);
2141  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2142  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2143  if (strstr(track->codec_id, "SBR")) {
2144  sri = matroska_aac_sri(track->audio.out_samplerate);
2145  extradata[2] = 0x56;
2146  extradata[3] = 0xE5;
2147  extradata[4] = 0x80 | (sri << 3);
2148  extradata_size = 5;
2149  } else
2150  extradata_size = 2;
2151  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2152  /* Only ALAC's magic cookie is stored in Matroska's track headers.
2153  * Create the "atom size", "tag", and "tag version" fields the
2154  * decoder expects manually. */
2155  extradata_size = 12 + track->codec_priv.size;
2156  extradata = av_mallocz(extradata_size +
2157  AV_INPUT_BUFFER_PADDING_SIZE);
2158  if (!extradata)
2159  return AVERROR(ENOMEM);
2160  AV_WB32(extradata, extradata_size);
2161  memcpy(&extradata[4], "alac", 4);
2162  AV_WB32(&extradata[8], 0);
2163  memcpy(&extradata[12], track->codec_priv.data,
2164  track->codec_priv.size);
2165  } else if (codec_id == AV_CODEC_ID_TTA) {
2166  extradata_size = 30;
2167  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2168  if (!extradata)
2169  return AVERROR(ENOMEM);
2170  ffio_init_context(&b, extradata, extradata_size, 1,
2171  NULL, NULL, NULL, NULL);
2172  avio_write(&b, "TTA1", 4);
2173  avio_wl16(&b, 1);
2174  if (track->audio.channels > UINT16_MAX ||
2175  track->audio.bitdepth > UINT16_MAX) {
2176  av_log(matroska->ctx, AV_LOG_WARNING,
2177  "Too large audio channel number %"PRIu64
2178  " or bitdepth %"PRIu64". Skipping track.\n",
2179  track->audio.channels, track->audio.bitdepth);
2180  av_freep(&extradata);
2181  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2182  return AVERROR_INVALIDDATA;
2183  else
2184  continue;
2185  }
2186  avio_wl16(&b, track->audio.channels);
2187  avio_wl16(&b, track->audio.bitdepth);
2188  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2189  return AVERROR_INVALIDDATA;
2190  avio_wl32(&b, track->audio.out_samplerate);
2191  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2192  track->audio.out_samplerate,
2193  AV_TIME_BASE * 1000));
2194  } else if (codec_id == AV_CODEC_ID_RV10 ||
2195  codec_id == AV_CODEC_ID_RV20 ||
2196  codec_id == AV_CODEC_ID_RV30 ||
2197  codec_id == AV_CODEC_ID_RV40) {
2198  extradata_offset = 26;
2199  } else if (codec_id == AV_CODEC_ID_RA_144) {
2200  track->audio.out_samplerate = 8000;
2201  track->audio.channels = 1;
2202  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2203  codec_id == AV_CODEC_ID_COOK ||
2204  codec_id == AV_CODEC_ID_ATRAC3 ||
2205  codec_id == AV_CODEC_ID_SIPR)
2206  && track->codec_priv.data) {
2207  int flavor;
2208 
2209  ffio_init_context(&b, track->codec_priv.data,
2210  track->codec_priv.size,
2211  0, NULL, NULL, NULL, NULL);
2212  avio_skip(&b, 22);
2213  flavor = avio_rb16(&b);
2214  track->audio.coded_framesize = avio_rb32(&b);
2215  avio_skip(&b, 12);
2216  track->audio.sub_packet_h = avio_rb16(&b);
2217  track->audio.frame_size = avio_rb16(&b);
2218  track->audio.sub_packet_size = avio_rb16(&b);
2219  if (flavor < 0 ||
2220  track->audio.coded_framesize <= 0 ||
2221  track->audio.sub_packet_h <= 0 ||
2222  track->audio.frame_size <= 0 ||
2223  track->audio.sub_packet_size <= 0)
2224  return AVERROR_INVALIDDATA;
2225  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2226  track->audio.frame_size);
2227  if (!track->audio.buf)
2228  return AVERROR(ENOMEM);
2229  if (codec_id == AV_CODEC_ID_RA_288) {
2230  st->codecpar->block_align = track->audio.coded_framesize;
2231  track->codec_priv.size = 0;
2232  } else {
2233  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2234  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2235  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2236  st->codecpar->bit_rate = sipr_bit_rate[flavor];
2237  }
2238  st->codecpar->block_align = track->audio.sub_packet_size;
2239  extradata_offset = 78;
2240  }
2241  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2242  ret = matroska_parse_flac(s, track, &extradata_offset);
2243  if (ret < 0)
2244  return ret;
2245  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2246  fourcc = AV_RL32(track->codec_priv.data);
2247  }
2248  track->codec_priv.size -= extradata_offset;
2249 
2250  if (codec_id == AV_CODEC_ID_NONE)
2251  av_log(matroska->ctx, AV_LOG_INFO,
2252  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2253 
2254  if (track->time_scale < 0.01)
2255  track->time_scale = 1.0;
2256  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2257  1000 * 1000 * 1000); /* 64 bit pts in ns */
2258 
2259  /* convert the delay from ns to the track timebase */
2260  track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2261  (AVRational){ 1, 1000000000 },
2262  st->time_base);
2263 
2264  st->codecpar->codec_id = codec_id;
2265 
2266  if (strcmp(track->language, "und"))
2267  av_dict_set(&st->metadata, "language", track->language, 0);
2268  av_dict_set(&st->metadata, "title", track->name, 0);
2269 
2270  if (track->flag_default)
2271  st->disposition |= AV_DISPOSITION_DEFAULT;
2272  if (track->flag_forced)
2273  st->disposition |= AV_DISPOSITION_FORCED;
2274 
2275  if (!st->codecpar->extradata) {
2276  if (extradata) {
2277  st->codecpar->extradata = extradata;
2278  st->codecpar->extradata_size = extradata_size;
2279  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2280  if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2281  return AVERROR(ENOMEM);
2282  memcpy(st->codecpar->extradata,
2283  track->codec_priv.data + extradata_offset,
2284  track->codec_priv.size);
2285  }
2286  }
2287 
2288  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2289  MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2290  int display_width_mul = 1;
2291  int display_height_mul = 1;
2292 
2293  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2294  st->codecpar->codec_tag = fourcc;
2295  if (bit_depth >= 0)
2296  st->codecpar->bits_per_coded_sample = bit_depth;
2297  st->codecpar->width = track->video.pixel_width;
2298  st->codecpar->height = track->video.pixel_height;
2299 
2300  if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2301  st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2302  else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2303  st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2304 
2305  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2306  mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2307 
2308  if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2309  av_reduce(&st->sample_aspect_ratio.num,
2310  &st->sample_aspect_ratio.den,
2311  st->codecpar->height * track->video.display_width * display_width_mul,
2312  st->codecpar->width * track->video.display_height * display_height_mul,
2313  255);
2314  }
2315  if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2316  st->need_parsing = AVSTREAM_PARSE_HEADERS;
2317 
2318  if (track->default_duration) {
2319  av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2320  1000000000, track->default_duration, 30000);
2321 #if FF_API_R_FRAME_RATE
2322  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2323  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2324  st->r_frame_rate = st->avg_frame_rate;
2325 #endif
2326  }
2327 
2328  /* export stereo mode flag as metadata tag */
2329  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2330  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2331 
2332  /* export alpha mode flag as metadata tag */
2333  if (track->video.alpha_mode)
2334  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2335 
2336  /* if we have virtual track, mark the real tracks */
2337  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2338  char buf[32];
2339  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2340  continue;
2341  snprintf(buf, sizeof(buf), "%s_%d",
2342  ff_matroska_video_stereo_plane[planes[j].type], i);
2343  for (k=0; k < matroska->tracks.nb_elem; k++)
2344  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2345  av_dict_set(&tracks[k].stream->metadata,
2346  "stereo_mode", buf, 0);
2347  break;
2348  }
2349  }
2350  // add stream level stereo3d side data if it is a supported format
2351  if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2352  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2353  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2354  if (ret < 0)
2355  return ret;
2356  }
2357 
2358  if (s->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
2359  int ret = mkv_parse_video_color(st, track);
2360  if (ret < 0)
2361  return ret;
2362  }
2363  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2364  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2365  st->codecpar->codec_tag = fourcc;
2366  st->codecpar->sample_rate = track->audio.out_samplerate;
2367  st->codecpar->channels = track->audio.channels;
2368  if (!st->codecpar->bits_per_coded_sample)
2369  st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2370  if (st->codecpar->codec_id == AV_CODEC_ID_MP3)
2371  st->need_parsing = AVSTREAM_PARSE_FULL;
2372  else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2373  st->need_parsing = AVSTREAM_PARSE_HEADERS;
2374  if (track->codec_delay > 0) {
2375  st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2376  (AVRational){1, 1000000000},
2377  (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2378  48000 : st->codecpar->sample_rate});
2379  }
2380  if (track->seek_preroll > 0) {
2381  st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2382  (AVRational){1, 1000000000},
2383  (AVRational){1, st->codecpar->sample_rate});
2384  }
2385  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2386  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2387 
2388  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2389  st->disposition |= AV_DISPOSITION_CAPTIONS;
2390  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2391  st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2392  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2393  st->disposition |= AV_DISPOSITION_METADATA;
2394  }
2395  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2396  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2397  if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2398  matroska->contains_ssa = 1;
2399  }
2400  }
2401 
2402  return 0;
2403 }
2404 
2405 static int matroska_read_header(AVFormatContext *s)
2406 {
2407  MatroskaDemuxContext *matroska = s->priv_data;
2408  EbmlList *attachments_list = &matroska->attachments;
2409  EbmlList *chapters_list = &matroska->chapters;
2410  MatroskaAttachment *attachments;
2411  MatroskaChapter *chapters;
2412  uint64_t max_start = 0;
2413  int64_t pos;
2414  Ebml ebml = { 0 };
2415  int i, j, res;
2416 
2417  matroska->ctx = s;
2418  matroska->cues_parsing_deferred = 1;
2419 
2420  /* First read the EBML header. */
2421  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2422  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2423  ebml_free(ebml_syntax, &ebml);
2424  return AVERROR_INVALIDDATA;
2425  }
2426  if (ebml.version > EBML_VERSION ||
2427  ebml.max_size > sizeof(uint64_t) ||
2428  ebml.id_length > sizeof(uint32_t) ||
2429  ebml.doctype_version > 3) {
2430  av_log(matroska->ctx, AV_LOG_ERROR,
2431  "EBML header using unsupported features\n"
2432  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2433  ebml.version, ebml.doctype, ebml.doctype_version);
2434  ebml_free(ebml_syntax, &ebml);
2435  return AVERROR_PATCHWELCOME;
2436  } else if (ebml.doctype_version == 3) {
2437  av_log(matroska->ctx, AV_LOG_WARNING,
2438  "EBML header using unsupported features\n"
2439  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2440  ebml.version, ebml.doctype, ebml.doctype_version);
2441  }
2442  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2443  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2444  break;
2445  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2446  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2447  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2448  ebml_free(ebml_syntax, &ebml);
2449  return AVERROR_INVALIDDATA;
2450  }
2451  }
2452  ebml_free(ebml_syntax, &ebml);
2453 
2454  /* The next thing is a segment. */
2455  pos = avio_tell(matroska->ctx->pb);
2456  res = ebml_parse(matroska, matroska_segments, matroska);
2457  // try resyncing until we find a EBML_STOP type element.
2458  while (res != 1) {
2459  res = matroska_resync(matroska, pos);
2460  if (res < 0)
2461  goto fail;
2462  pos = avio_tell(matroska->ctx->pb);
2463  res = ebml_parse(matroska, matroska_segment, matroska);
2464  }
2465  matroska_execute_seekhead(matroska);
2466 
2467  if (!matroska->time_scale)
2468  matroska->time_scale = 1000000;
2469  if (matroska->duration)
2470  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2471  1000 / AV_TIME_BASE;
2472  av_dict_set(&s->metadata, "title", matroska->title, 0);
2473  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2474 
2475  if (matroska->date_utc.size == 8)
2476  matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2477 
2478  res = matroska_parse_tracks(s);
2479  if (res < 0)
2480  goto fail;
2481 
2482  attachments = attachments_list->elem;
2483  for (j = 0; j < attachments_list->nb_elem; j++) {
2484  if (!(attachments[j].filename && attachments[j].mime &&
2485  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2486  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2487  } else {
2488  AVStream *st = avformat_new_stream(s, NULL);
2489  if (!st)
2490  break;
2491  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2492  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2493  st->codecpar->codec_id = AV_CODEC_ID_NONE;
2494 
2495  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2496  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2497  strlen(ff_mkv_image_mime_tags[i].str))) {
2498  st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2499  break;
2500  }
2501  }
2502 
2503  attachments[j].stream = st;
2504 
2505  if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2506  st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2507  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2508 
2509  av_init_packet(&st->attached_pic);
2510  if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2511  return res;
2512  memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2513  st->attached_pic.stream_index = st->index;
2514  st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2515  } else {
2516  st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2517  if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2518  break;
2519  memcpy(st->codecpar->extradata, attachments[j].bin.data,
2520  attachments[j].bin.size);
2521 
2522  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2523  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2524  strlen(ff_mkv_mime_tags[i].str))) {
2525  st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2526  break;
2527  }
2528  }
2529  }
2530  }
2531  }
2532 
2533  chapters = chapters_list->elem;
2534  for (i = 0; i < chapters_list->nb_elem; i++)
2535  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2536  (max_start == 0 || chapters[i].start > max_start)) {
2537  chapters[i].chapter =
2538  avpriv_new_chapter(s, chapters[i].uid,
2539  (AVRational) { 1, 1000000000 },
2540  chapters[i].start, chapters[i].end,
2541  chapters[i].title);
2542  if (chapters[i].chapter) {
2543  av_dict_set(&chapters[i].chapter->metadata,
2544  "title", chapters[i].title, 0);
2545  }
2546  max_start = chapters[i].start;
2547  }
2548 
2549  matroska_add_index_entries(matroska);
2550 
2551  matroska_convert_tags(s);
2552 
2553  return 0;
2554 fail:
2555  matroska_read_close(s);
2556  return res;
2557 }
2558 
2559 /*
2560  * Put one packet in an application-supplied AVPacket struct.
2561  * Returns 0 on success or -1 on failure.
2562  */
2563 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2564  AVPacket *pkt)
2565 {
2566  if (matroska->num_packets > 0) {
2567  MatroskaTrack *tracks = matroska->tracks.elem;
2568  MatroskaTrack *track;
2569  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2570  av_freep(&matroska->packets[0]);
2571  track = &tracks[pkt->stream_index];
2572  if (track->has_palette) {
2573  uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2574  if (!pal) {
2575  av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2576  } else {
2577  memcpy(pal, track->palette, AVPALETTE_SIZE);
2578  }
2579  track->has_palette = 0;
2580  }
2581  if (matroska->num_packets > 1) {
2582  void *newpackets;
2583  memmove(&matroska->packets[0], &matroska->packets[1],
2584  (matroska->num_packets - 1) * sizeof(AVPacket *));
2585  newpackets = av_realloc(matroska->packets,
2586  (matroska->num_packets - 1) *
2587  sizeof(AVPacket *));
2588  if (newpackets)
2589  matroska->packets = newpackets;
2590  } else {
2591  av_freep(&matroska->packets);
2592  matroska->prev_pkt = NULL;
2593  }
2594  matroska->num_packets--;
2595  return 0;
2596  }
2597 
2598  return -1;
2599 }
2600 
2601 /*
2602  * Free all packets in our internal queue.
2603  */
2604 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2605 {
2606  matroska->prev_pkt = NULL;
2607  if (matroska->packets) {
2608  int n;
2609  for (n = 0; n < matroska->num_packets; n++) {
2610  av_packet_unref(matroska->packets[n]);
2611  av_freep(&matroska->packets[n]);
2612  }
2613  av_freep(&matroska->packets);
2614  matroska->num_packets = 0;
2615  }
2616 }
2617 
2618 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2619  int *buf_size, int type,
2620  uint32_t **lace_buf, int *laces)
2621 {
2622  int res = 0, n, size = *buf_size;
2623  uint8_t *data = *buf;
2624  uint32_t *lace_size;
2625 
2626  if (!type) {
2627  *laces = 1;
2628  *lace_buf = av_mallocz(sizeof(int));
2629  if (!*lace_buf)
2630  return AVERROR(ENOMEM);
2631 
2632  *lace_buf[0] = size;
2633  return 0;
2634  }
2635 
2636  av_assert0(size > 0);
2637  *laces = *data + 1;
2638  data += 1;
2639  size -= 1;
2640  lace_size = av_mallocz(*laces * sizeof(int));
2641  if (!lace_size)
2642  return AVERROR(ENOMEM);
2643 
2644  switch (type) {
2645  case 0x1: /* Xiph lacing */
2646  {
2647  uint8_t temp;
2648  uint32_t total = 0;
2649  for (n = 0; res == 0 && n < *laces - 1; n++) {
2650  while (1) {
2651  if (size <= total) {
2652  res = AVERROR_INVALIDDATA;
2653  break;
2654  }
2655  temp = *data;
2656  total += temp;
2657  lace_size[n] += temp;
2658  data += 1;
2659  size -= 1;
2660  if (temp != 0xff)
2661  break;
2662  }
2663  }
2664  if (size <= total) {
2665  res = AVERROR_INVALIDDATA;
2666  break;
2667  }
2668 
2669  lace_size[n] = size - total;
2670  break;
2671  }
2672 
2673  case 0x2: /* fixed-size lacing */
2674  if (size % (*laces)) {
2675  res = AVERROR_INVALIDDATA;
2676  break;
2677  }
2678  for (n = 0; n < *laces; n++)
2679  lace_size[n] = size / *laces;
2680  break;
2681 
2682  case 0x3: /* EBML lacing */
2683  {
2684  uint64_t num;
2685  uint64_t total;
2686  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2687  if (n < 0 || num > INT_MAX) {
2688  av_log(matroska->ctx, AV_LOG_INFO,
2689  "EBML block data error\n");
2690  res = n<0 ? n : AVERROR_INVALIDDATA;
2691  break;
2692  }
2693  data += n;
2694  size -= n;
2695  total = lace_size[0] = num;
2696  for (n = 1; res == 0 && n < *laces - 1; n++) {
2697  int64_t snum;
2698  int r;
2699  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2700  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2701  av_log(matroska->ctx, AV_LOG_INFO,
2702  "EBML block data error\n");
2703  res = r<0 ? r : AVERROR_INVALIDDATA;
2704  break;
2705  }
2706  data += r;
2707  size -= r;
2708  lace_size[n] = lace_size[n - 1] + snum;
2709  total += lace_size[n];
2710  }
2711  if (size <= total) {
2712  res = AVERROR_INVALIDDATA;
2713  break;
2714  }
2715  lace_size[*laces - 1] = size - total;
2716  break;
2717  }
2718  }
2719 
2720  *buf = data;
2721  *lace_buf = lace_size;
2722  *buf_size = size;
2723 
2724  return res;
2725 }
2726 
2727 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2728  MatroskaTrack *track, AVStream *st,
2729  uint8_t *data, int size, uint64_t timecode,
2730  int64_t pos)
2731 {
2732  int a = st->codecpar->block_align;
2733  int sps = track->audio.sub_packet_size;
2734  int cfs = track->audio.coded_framesize;
2735  int h = track->audio.sub_packet_h;
2736  int y = track->audio.sub_packet_cnt;
2737  int w = track->audio.frame_size;
2738  int x;
2739 
2740  if (!track->audio.pkt_cnt) {
2741  if (track->audio.sub_packet_cnt == 0)
2742  track->audio.buf_timecode = timecode;
2743  if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2744  if (size < cfs * h / 2) {
2745  av_log(matroska->ctx, AV_LOG_ERROR,
2746  "Corrupt int4 RM-style audio packet size\n");
2747  return AVERROR_INVALIDDATA;
2748  }
2749  for (x = 0; x < h / 2; x++)
2750  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2751  data + x * cfs, cfs);
2752  } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2753  if (size < w) {
2754  av_log(matroska->ctx, AV_LOG_ERROR,
2755  "Corrupt sipr RM-style audio packet size\n");
2756  return AVERROR_INVALIDDATA;
2757  }
2758  memcpy(track->audio.buf + y * w, data, w);
2759  } else {
2760  if (size < sps * w / sps || h<=0 || w%sps) {
2761  av_log(matroska->ctx, AV_LOG_ERROR,
2762  "Corrupt generic RM-style audio packet size\n");
2763  return AVERROR_INVALIDDATA;
2764  }
2765  for (x = 0; x < w / sps; x++)
2766  memcpy(track->audio.buf +
2767  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2768  data + x * sps, sps);
2769  }
2770 
2771  if (++track->audio.sub_packet_cnt >= h) {
2772  if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2773  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2774  track->audio.sub_packet_cnt = 0;
2775  track->audio.pkt_cnt = h * w / a;
2776  }
2777  }
2778 
2779  while (track->audio.pkt_cnt) {
2780  int ret;
2781  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2782  if (!pkt)
2783  return AVERROR(ENOMEM);
2784 
2785  ret = av_new_packet(pkt, a);
2786  if (ret < 0) {
2787  av_free(pkt);
2788  return ret;
2789  }
2790  memcpy(pkt->data,
2791  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2792  a);
2793  pkt->pts = track->audio.buf_timecode;
2794  track->audio.buf_timecode = AV_NOPTS_VALUE;
2795  pkt->pos = pos;
2796  pkt->stream_index = st->index;
2797  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2798  }
2799 
2800  return 0;
2801 }
2802 
2803 /* reconstruct full wavpack blocks from mangled matroska ones */
2804 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2805  uint8_t **pdst, int *size)
2806 {
2807  uint8_t *dst = NULL;
2808  int dstlen = 0;
2809  int srclen = *size;
2810  uint32_t samples;
2811  uint16_t ver;
2812  int ret, offset = 0;
2813 
2814  if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2815  return AVERROR_INVALIDDATA;
2816 
2817  ver = AV_RL16(track->stream->codecpar->extradata);
2818 
2819  samples = AV_RL32(src);
2820  src += 4;
2821  srclen -= 4;
2822 
2823  while (srclen >= 8) {
2824  int multiblock;
2825  uint32_t blocksize;
2826  uint8_t *tmp;
2827 
2828  uint32_t flags = AV_RL32(src);
2829  uint32_t crc = AV_RL32(src + 4);
2830  src += 8;
2831  srclen -= 8;
2832 
2833  multiblock = (flags & 0x1800) != 0x1800;
2834  if (multiblock) {
2835  if (srclen < 4) {
2836  ret = AVERROR_INVALIDDATA;
2837  goto fail;
2838  }
2839  blocksize = AV_RL32(src);
2840  src += 4;
2841  srclen -= 4;
2842  } else
2843  blocksize = srclen;
2844 
2845  if (blocksize > srclen) {
2846  ret = AVERROR_INVALIDDATA;
2847  goto fail;
2848  }
2849 
2850  tmp = av_realloc(dst, dstlen + blocksize + 32);
2851  if (!tmp) {
2852  ret = AVERROR(ENOMEM);
2853  goto fail;
2854  }
2855  dst = tmp;
2856  dstlen += blocksize + 32;
2857 
2858  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2859  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2860  AV_WL16(dst + offset + 8, ver); // version
2861  AV_WL16(dst + offset + 10, 0); // track/index_no
2862  AV_WL32(dst + offset + 12, 0); // total samples
2863  AV_WL32(dst + offset + 16, 0); // block index
2864  AV_WL32(dst + offset + 20, samples); // number of samples
2865  AV_WL32(dst + offset + 24, flags); // flags
2866  AV_WL32(dst + offset + 28, crc); // crc
2867  memcpy(dst + offset + 32, src, blocksize); // block data
2868 
2869  src += blocksize;
2870  srclen -= blocksize;
2871  offset += blocksize + 32;
2872  }
2873 
2874  *pdst = dst;
2875  *size = dstlen;
2876 
2877  return 0;
2878 
2879 fail:
2880  av_freep(&dst);
2881  return ret;
2882 }
2883 
2884 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
2885  MatroskaTrack *track,
2886  AVStream *st,
2887  uint8_t *data, int data_len,
2888  uint64_t timecode,
2889  uint64_t duration,
2890  int64_t pos)
2891 {
2892  AVPacket *pkt;
2893  uint8_t *id, *settings, *text, *buf;
2894  int id_len, settings_len, text_len;
2895  uint8_t *p, *q;
2896  int err;
2897 
2898  if (data_len <= 0)
2899  return AVERROR_INVALIDDATA;
2900 
2901  p = data;
2902  q = data + data_len;
2903 
2904  id = p;
2905  id_len = -1;
2906  while (p < q) {
2907  if (*p == '\r' || *p == '\n') {
2908  id_len = p - id;
2909  if (*p == '\r')
2910  p++;
2911  break;
2912  }
2913  p++;
2914  }
2915 
2916  if (p >= q || *p != '\n')
2917  return AVERROR_INVALIDDATA;
2918  p++;
2919 
2920  settings = p;
2921  settings_len = -1;
2922  while (p < q) {
2923  if (*p == '\r' || *p == '\n') {
2924  settings_len = p - settings;
2925  if (*p == '\r')
2926  p++;
2927  break;
2928  }
2929  p++;
2930  }
2931 
2932  if (p >= q || *p != '\n')
2933  return AVERROR_INVALIDDATA;
2934  p++;
2935 
2936  text = p;
2937  text_len = q - p;
2938  while (text_len > 0) {
2939  const int len = text_len - 1;
2940  const uint8_t c = p[len];
2941  if (c != '\r' && c != '\n')
2942  break;
2943  text_len = len;
2944  }
2945 
2946  if (text_len <= 0)
2947  return AVERROR_INVALIDDATA;
2948 
2949  pkt = av_mallocz(sizeof(*pkt));
2950  if (!pkt)
2951  return AVERROR(ENOMEM);
2952  err = av_new_packet(pkt, text_len);
2953  if (err < 0) {
2954  av_free(pkt);
2955  return AVERROR(err);
2956  }
2957 
2958  memcpy(pkt->data, text, text_len);
2959 
2960  if (id_len > 0) {
2961  buf = av_packet_new_side_data(pkt,
2962  AV_PKT_DATA_WEBVTT_IDENTIFIER,
2963  id_len);
2964  if (!buf) {
2965  av_free(pkt);
2966  return AVERROR(ENOMEM);
2967  }
2968  memcpy(buf, id, id_len);
2969  }
2970 
2971  if (settings_len > 0) {
2972  buf = av_packet_new_side_data(pkt,
2973  AV_PKT_DATA_WEBVTT_SETTINGS,
2974  settings_len);
2975  if (!buf) {
2976  av_free(pkt);
2977  return AVERROR(ENOMEM);
2978  }
2979  memcpy(buf, settings, settings_len);
2980  }
2981 
2982  // Do we need this for subtitles?
2983  // pkt->flags = AV_PKT_FLAG_KEY;
2984 
2985  pkt->stream_index = st->index;
2986  pkt->pts = timecode;
2987 
2988  // Do we need this for subtitles?
2989  // pkt->dts = timecode;
2990 
2991  pkt->duration = duration;
2992  pkt->pos = pos;
2993 
2994  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2995  matroska->prev_pkt = pkt;
2996 
2997  return 0;
2998 }
2999 
3000 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3001  MatroskaTrack *track, AVStream *st,
3002  uint8_t *data, int pkt_size,
3003  uint64_t timecode, uint64_t lace_duration,
3004  int64_t pos, int is_keyframe,
3005  uint8_t *additional, uint64_t additional_id, int additional_size,
3006  int64_t discard_padding)
3007 {
3008  MatroskaTrackEncoding *encodings = track->encodings.elem;
3009  uint8_t *pkt_data = data;
3010  int offset = 0, res;
3011  AVPacket *pkt;
3012 
3013  if (encodings && !encodings->type && encodings->scope & 1) {
3014  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3015  if (res < 0)
3016  return res;
3017  }
3018 
3019  if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3020  uint8_t *wv_data;
3021  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3022  if (res < 0) {
3023  av_log(matroska->ctx, AV_LOG_ERROR,
3024  "Error parsing a wavpack block.\n");
3025  goto fail;
3026  }
3027  if (pkt_data != data)
3028  av_freep(&pkt_data);
3029  pkt_data = wv_data;
3030  }
3031 
3032  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3033  AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
3034  offset = 8;
3035 
3036  pkt = av_mallocz(sizeof(AVPacket));
3037  if (!pkt) {
3038  if (pkt_data != data)
3039  av_freep(&pkt_data);
3040  return AVERROR(ENOMEM);
3041  }
3042  /* XXX: prevent data copy... */
3043  if (av_new_packet(pkt, pkt_size + offset) < 0) {
3044  av_free(pkt);
3045  res = AVERROR(ENOMEM);
3046  goto fail;
3047  }
3048 
3049  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
3050  uint8_t *buf = pkt->data;
3051  bytestream_put_be32(&buf, pkt_size);
3052  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
3053  }
3054 
3055  memcpy(pkt->data + offset, pkt_data, pkt_size);
3056 
3057  if (pkt_data != data)
3058  av_freep(&pkt_data);
3059 
3060  pkt->flags = is_keyframe;
3061  pkt->stream_index = st->index;
3062 
3063  if (additional_size > 0) {
3064  uint8_t *side_data = av_packet_new_side_data(pkt,
3065  AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3066  additional_size + 8);
3067  if (!side_data) {
3068  av_packet_unref(pkt);
3069  av_free(pkt);
3070  return AVERROR(ENOMEM);
3071  }
3072  AV_WB64(side_data, additional_id);
3073  memcpy(side_data + 8, additional, additional_size);
3074  }
3075 
3076  if (discard_padding) {
3077  uint8_t *side_data = av_packet_new_side_data(pkt,
3078  AV_PKT_DATA_SKIP_SAMPLES,
3079  10);
3080  if (!side_data) {
3081  av_packet_unref(pkt);
3082  av_free(pkt);
3083  return AVERROR(ENOMEM);
3084  }
3085  AV_WL32(side_data, 0);
3086  AV_WL32(side_data + 4, av_rescale_q(discard_padding,
3087  (AVRational){1, 1000000000},
3088  (AVRational){1, st->codecpar->sample_rate}));
3089  }
3090 
3091  if (track->ms_compat)
3092  pkt->dts = timecode;
3093  else
3094  pkt->pts = timecode;
3095  pkt->pos = pos;
3096  pkt->duration = lace_duration;
3097 
3098 #if FF_API_CONVERGENCE_DURATION
3099 FF_DISABLE_DEPRECATION_WARNINGS
3100  if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3101  pkt->convergence_duration = lace_duration;
3102  }
3103 FF_ENABLE_DEPRECATION_WARNINGS
3104 #endif
3105 
3106  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3107  matroska->prev_pkt = pkt;
3108 
3109  return 0;
3110 
3111 fail:
3112  if (pkt_data != data)
3113  av_freep(&pkt_data);
3114  return res;
3115 }
3116 
3117 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
3118  int size, int64_t pos, uint64_t cluster_time,
3119  uint64_t block_duration, int is_keyframe,
3120  uint8_t *additional, uint64_t additional_id, int additional_size,
3121  int64_t cluster_pos, int64_t discard_padding)
3122 {
3123  uint64_t timecode = AV_NOPTS_VALUE;
3124  MatroskaTrack *track;
3125  int res = 0;
3126  AVStream *st;
3127  int16_t block_time;
3128  uint32_t *lace_size = NULL;
3129  int n, flags, laces = 0;
3130  uint64_t num;
3131  int trust_default_duration = 1;
3132 
3133  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3134  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3135  return n;
3136  }
3137  data += n;
3138  size -= n;
3139 
3140  track = matroska_find_track_by_num(matroska, num);
3141  if (!track || !track->stream) {
3142  av_log(matroska->ctx, AV_LOG_INFO,
3143  "Invalid stream %"PRIu64" or size %u\n", num, size);
3144  return AVERROR_INVALIDDATA;
3145  } else if (size <= 3)
3146  return 0;
3147  st = track->stream;
3148  if (st->discard >= AVDISCARD_ALL)
3149  return res;
3150  av_assert1(block_duration != AV_NOPTS_VALUE);
3151 
3152  block_time = sign_extend(AV_RB16(data), 16);
3153  data += 2;
3154  flags = *data++;
3155  size -= 3;
3156  if (is_keyframe == -1)
3157  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3158 
3159  if (cluster_time != (uint64_t) -1 &&
3160  (block_time >= 0 || cluster_time >= -block_time)) {
3161  timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3162  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3163  timecode < track->end_timecode)
3164  is_keyframe = 0; /* overlapping subtitles are not key frame */
3165  if (is_keyframe)
3166  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3167  AVINDEX_KEYFRAME);
3168  }
3169 
3170  if (matroska->skip_to_keyframe &&
3171  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3172  // Compare signed timecodes. Timecode may be negative due to codec delay
3173  // offset. We don't support timestamps greater than int64_t anyway - see
3174  // AVPacket's pts.
3175  if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3176  return res;
3177  if (is_keyframe)
3178  matroska->skip_to_keyframe = 0;
3179  else if (!st->skip_to_keyframe) {
3180  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3181  matroska->skip_to_keyframe = 0;
3182  }
3183  }
3184 
3185  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3186  &lace_size, &laces);
3187 
3188  if (res)
3189  goto end;
3190 
3191  if (track->audio.samplerate == 8000) {
3192  // If this is needed for more codecs, then add them here
3193  if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3194  if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3195  trust_default_duration = 0;
3196  }
3197  }
3198 
3199  if (!block_duration && trust_default_duration)
3200  block_duration = track->default_duration * laces / matroska->time_scale;
3201 
3202  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3203  track->end_timecode =
3204  FFMAX(track->end_timecode, timecode + block_duration);
3205 
3206  for (n = 0; n < laces; n++) {
3207  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3208 
3209  if (lace_size[n] > size) {
3210  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3211  break;
3212  }
3213 
3214  if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3215  st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3216  st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3217  st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3218  st->codecpar->block_align && track->audio.sub_packet_size) {
3219  res = matroska_parse_rm_audio(matroska, track, st, data,
3220  lace_size[n],
3221  timecode, pos);
3222  if (res)
3223  goto end;
3224 
3225  } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3226  res = matroska_parse_webvtt(matroska, track, st,
3227  data, lace_size[n],
3228  timecode, lace_duration,
3229  pos);
3230  if (res)
3231  goto end;
3232  } else {
3233  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
3234  timecode, lace_duration, pos,
3235  !n ? is_keyframe : 0,
3236  additional, additional_id, additional_size,
3237  discard_padding);
3238  if (res)
3239  goto end;
3240  }
3241 
3242  if (timecode != AV_NOPTS_VALUE)
3243  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3244  data += lace_size[n];
3245  size -= lace_size[n];
3246  }
3247 
3248 end:
3249  av_free(lace_size);
3250  return res;
3251 }
3252 
3253 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
3254 {
3255  EbmlList *blocks_list;
3256  MatroskaBlock *blocks;
3257  int i, res;
3258  res = ebml_parse(matroska,
3259  matroska_cluster_incremental_parsing,
3260  &matroska->current_cluster);
3261  if (res == 1) {
3262  /* New Cluster */
3263  if (matroska->current_cluster_pos)
3264  ebml_level_end(matroska);
3265  ebml_free(matroska_cluster, &matroska->current_cluster);
3266  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3267  matroska->current_cluster_num_blocks = 0;
3268  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3269  matroska->prev_pkt = NULL;
3270  /* sizeof the ID which was already read */
3271  if (matroska->current_id)
3272  matroska->current_cluster_pos -= 4;
3273  res = ebml_parse(matroska,
3274  matroska_clusters_incremental,
3275  &matroska->current_cluster);
3276  /* Try parsing the block again. */
3277  if (res == 1)
3278  res = ebml_parse(matroska,
3279  matroska_cluster_incremental_parsing,
3280  &matroska->current_cluster);
3281  }
3282 
3283  if (!res &&
3284  matroska->current_cluster_num_blocks <
3285  matroska->current_cluster.blocks.nb_elem) {
3286  blocks_list = &matroska->current_cluster.blocks;
3287  blocks = blocks_list->elem;
3288 
3289  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3290  i = blocks_list->nb_elem - 1;
3291  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3292  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3293  uint8_t* additional = blocks[i].additional.size > 0 ?
3294  blocks[i].additional.data : NULL;
3295  if (!blocks[i].non_simple)
3296  blocks[i].duration = 0;
3297  res = matroska_parse_block(matroska, blocks[i].bin.data,
3298  blocks[i].bin.size, blocks[i].bin.pos,
3299  matroska->current_cluster.timecode,
3300  blocks[i].duration, is_keyframe,
3301  additional, blocks[i].additional_id,
3302  blocks[i].additional.size,
3303  matroska->current_cluster_pos,
3304  blocks[i].discard_padding);
3305  }
3306  }
3307 
3308  return res;
3309 }
3310 
3311 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3312 {
3313  MatroskaCluster cluster = { 0 };
3314  EbmlList *blocks_list;
3315  MatroskaBlock *blocks;
3316  int i, res;
3317  int64_t pos;
3318 
3319  if (!matroska->contains_ssa)
3320  return matroska_parse_cluster_incremental(matroska);
3321  pos = avio_tell(matroska->ctx->pb);
3322  matroska->prev_pkt = NULL;
3323  if (matroska->current_id)
3324  pos -= 4; /* sizeof the ID which was already read */
3325  res = ebml_parse(matroska, matroska_clusters, &cluster);
3326  blocks_list = &cluster.blocks;
3327  blocks = blocks_list->elem;
3328  for (i = 0; i < blocks_list->nb_elem; i++)
3329  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3330  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3331  res = matroska_parse_block(matroska, blocks[i].bin.data,
3332  blocks[i].bin.size, blocks[i].bin.pos,
3333  cluster.timecode, blocks[i].duration,
3334  is_keyframe, NULL, 0, 0, pos,
3335  blocks[i].discard_padding);
3336  }
3337  ebml_free(matroska_cluster, &cluster);
3338  return res;
3339 }
3340 
3341 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3342 {
3343  MatroskaDemuxContext *matroska = s->priv_data;
3344  int ret = 0;
3345 
3346  while (matroska_deliver_packet(matroska, pkt)) {
3347  int64_t pos = avio_tell(matroska->ctx->pb);
3348  if (matroska->done)
3349  return (ret < 0) ? ret : AVERROR_EOF;
3350  if (matroska_parse_cluster(matroska) < 0)
3351  ret = matroska_resync(matroska, pos);
3352  }
3353 
3354  return ret;
3355 }
3356 
3357 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3358  int64_t timestamp, int flags)
3359 {
3360  MatroskaDemuxContext *matroska = s->priv_data;
3361  MatroskaTrack *tracks = NULL;
3362  AVStream *st = s->streams[stream_index];
3363  int i, index, index_sub, index_min;
3364 
3365  /* Parse the CUES now since we need the index data to seek. */
3366  if (matroska->cues_parsing_deferred > 0) {
3367  matroska->cues_parsing_deferred = 0;
3368  matroska_parse_cues(matroska);
3369  }
3370 
3371  if (!st->nb_index_entries)
3372  goto err;
3373  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3374 
3375  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3376  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3377  SEEK_SET);
3378  matroska->current_id = 0;
3379  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3380  matroska_clear_queue(matroska);
3381  if (matroska_parse_cluster(matroska) < 0)
3382  break;
3383  }
3384  }
3385 
3386  matroska_clear_queue(matroska);
3387  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3388  goto err;
3389 
3390  index_min = index;
3391  tracks = matroska->tracks.elem;
3392  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3393  tracks[i].audio.pkt_cnt = 0;
3394  tracks[i].audio.sub_packet_cnt = 0;
3395  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3396  tracks[i].end_timecode = 0;
3397  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3398  tracks[i].stream &&
3399  tracks[i].stream->discard != AVDISCARD_ALL) {
3400  index_sub = av_index_search_timestamp(
3401  tracks[i].stream, st->index_entries[index].timestamp,
3402  AVSEEK_FLAG_BACKWARD);
3403  while (index_sub >= 0 &&
3404  index_min > 0 &&
3405  tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3406  st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3407  index_min--;
3408  }
3409  }
3410 
3411  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3412  matroska->current_id = 0;
3413  if (flags & AVSEEK_FLAG_ANY) {
3414  st->skip_to_keyframe = 0;
3415  matroska->skip_to_timecode = timestamp;
3416  } else {
3417  st->skip_to_keyframe = 1;
3418  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3419  }
3420  matroska->skip_to_keyframe = 1;
3421  matroska->done = 0;
3422  matroska->num_levels = 0;
3423  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3424  return 0;
3425 err:
3426  // slightly hackish but allows proper fallback to
3427  // the generic seeking code.
3428  matroska_clear_queue(matroska);
3429  matroska->current_id = 0;
3430  st->skip_to_keyframe =
3431  matroska->skip_to_keyframe = 0;
3432  matroska->done = 0;
3433  matroska->num_levels = 0;
3434  return -1;
3435 }
3436 
3437 static int matroska_read_close(AVFormatContext *s)
3438 {
3439  MatroskaDemuxContext *matroska = s->priv_data;
3440  MatroskaTrack *tracks = matroska->tracks.elem;
3441  int n;
3442 
3443  matroska_clear_queue(matroska);
3444 
3445  for (n = 0; n < matroska->tracks.nb_elem; n++)
3446  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3447  av_freep(&tracks[n].audio.buf);
3448  ebml_free(matroska_cluster, &matroska->current_cluster);
3449  ebml_free(matroska_segment, matroska);
3450 
3451  return 0;
3452 }
3453 
3454 typedef struct {
3455  int64_t start_time_ns;
3456  int64_t end_time_ns;
3457  int64_t start_offset;
3458  int64_t end_offset;
3459 } CueDesc;
3460 
3461 /* This function searches all the Cues and returns the CueDesc corresponding the
3462  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3463  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3464  */
3465 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3466  MatroskaDemuxContext *matroska = s->priv_data;
3467  CueDesc cue_desc;
3468  int i;
3469  int nb_index_entries = s->streams[0]->nb_index_entries;
3470  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3471  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3472  for (i = 1; i < nb_index_entries; i++) {
3473  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3474  index_entries[i].timestamp * matroska->time_scale > ts) {
3475  break;
3476  }
3477  }
3478  --i;
3479  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3480  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3481  if (i != nb_index_entries - 1) {
3482  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3483  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3484  } else {
3485  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3486  // FIXME: this needs special handling for files where Cues appear
3487  // before Clusters. the current logic assumes Cues appear after
3488  // Clusters.
3489  cue_desc.end_offset = cues_start - matroska->segment_start;
3490  }
3491  return cue_desc;
3492 }
3493 
3494 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3495 {
3496  MatroskaDemuxContext *matroska = s->priv_data;
3497  int64_t cluster_pos, before_pos;
3498  int index, rv = 1;
3499  if (s->streams[0]->nb_index_entries <= 0) return 0;
3500  // seek to the first cluster using cues.
3501  index = av_index_search_timestamp(s->streams[0], 0, 0);
3502  if (index < 0) return 0;
3503  cluster_pos = s->streams[0]->index_entries[index].pos;
3504  before_pos = avio_tell(s->pb);
3505  while (1) {
3506  int64_t cluster_id = 0, cluster_length = 0;
3507  AVPacket *pkt;
3508  avio_seek(s->pb, cluster_pos, SEEK_SET);
3509  // read cluster id and length
3510  ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3511  ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3512  if (cluster_id != 0xF43B675) { // done with all clusters
3513  break;
3514  }
3515  avio_seek(s->pb, cluster_pos, SEEK_SET);
3516  matroska->current_id = 0;
3517  matroska_clear_queue(matroska);
3518  if (matroska_parse_cluster(matroska) < 0 ||
3519  matroska->num_packets <= 0) {
3520  break;
3521  }
3522  pkt = matroska->packets[0];
3523  cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3524  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3525  rv = 0;
3526  break;
3527  }
3528  }
3529  avio_seek(s->pb, before_pos, SEEK_SET);
3530  return rv;
3531 }
3532 
3533 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3534  double min_buffer, double* buffer,
3535  double* sec_to_download, AVFormatContext *s,
3536  int64_t cues_start)
3537 {
3538  double nano_seconds_per_second = 1000000000.0;
3539  double time_sec = time_ns / nano_seconds_per_second;
3540  int rv = 0;
3541  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3542  int64_t end_time_ns = time_ns + time_to_search_ns;
3543  double sec_downloaded = 0.0;
3544  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3545  if (desc_curr.start_time_ns == -1)
3546  return -1;
3547  *sec_to_download = 0.0;
3548 
3549  // Check for non cue start time.
3550  if (time_ns > desc_curr.start_time_ns) {
3551  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3552  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3553  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3554  double timeToDownload = (cueBytes * 8.0) / bps;
3555 
3556  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3557  *sec_to_download += timeToDownload;
3558 
3559  // Check if the search ends within the first cue.
3560  if (desc_curr.end_time_ns >= end_time_ns) {
3561  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3562  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3563  sec_downloaded = percent_to_sub * sec_downloaded;
3564  *sec_to_download = percent_to_sub * *sec_to_download;
3565  }
3566 
3567  if ((sec_downloaded + *buffer) <= min_buffer) {
3568  return 1;
3569  }
3570 
3571  // Get the next Cue.
3572  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3573  }
3574 
3575  while (desc_curr.start_time_ns != -1) {
3576  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3577  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3578  double desc_sec = desc_ns / nano_seconds_per_second;
3579  double bits = (desc_bytes * 8.0);
3580  double time_to_download = bits / bps;
3581 
3582  sec_downloaded += desc_sec - time_to_download;
3583  *sec_to_download += time_to_download;
3584 
3585  if (desc_curr.end_time_ns >= end_time_ns) {
3586  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3587  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3588  sec_downloaded = percent_to_sub * sec_downloaded;
3589  *sec_to_download = percent_to_sub * *sec_to_download;
3590 
3591  if ((sec_downloaded + *buffer) <= min_buffer)
3592  rv = 1;
3593  break;
3594  }
3595 
3596  if ((sec_downloaded + *buffer) <= min_buffer) {
3597  rv = 1;
3598  break;
3599  }
3600 
3601  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3602  }
3603  *buffer = *buffer + sec_downloaded;
3604  return rv;
3605 }
3606 
3607 /* This function computes the bandwidth of the WebM file with the help of
3608  * buffer_size_after_time_downloaded() function. Both of these functions are
3609  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3610  * Matroska parsing mechanism.
3611  *
3612  * Returns the bandwidth of the file on success; -1 on error.
3613  * */
3614 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3615 {
3616  MatroskaDemuxContext *matroska = s->priv_data;
3617  AVStream *st = s->streams[0];
3618  double bandwidth = 0.0;
3619  int i;
3620 
3621  for (i = 0; i < st->nb_index_entries; i++) {
3622  int64_t prebuffer_ns = 1000000000;
3623  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3624  double nano_seconds_per_second = 1000000000.0;
3625  int64_t prebuffered_ns = time_ns + prebuffer_ns;
3626  double prebuffer_bytes = 0.0;
3627  int64_t temp_prebuffer_ns = prebuffer_ns;
3628  int64_t pre_bytes, pre_ns;
3629  double pre_sec, prebuffer, bits_per_second;
3630  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3631 
3632  // Start with the first Cue.
3633  CueDesc desc_end = desc_beg;
3634 
3635  // Figure out how much data we have downloaded for the prebuffer. This will
3636  // be used later to adjust the bits per sample to try.
3637  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3638  // Prebuffered the entire Cue.
3639  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3640  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3641  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3642  }
3643  if (desc_end.start_time_ns == -1) {
3644  // The prebuffer is larger than the duration.
3645  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3646  return -1;
3647  bits_per_second = 0.0;
3648  } else {
3649  // The prebuffer ends in the last Cue. Estimate how much data was
3650  // prebuffered.
3651  pre_bytes = desc_end.end_offset - desc_end.start_offset;
3652  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3653  pre_sec = pre_ns / nano_seconds_per_second;
3654  prebuffer_bytes +=
3655  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3656 
3657  prebuffer = prebuffer_ns / nano_seconds_per_second;
3658 
3659  // Set this to 0.0 in case our prebuffer buffers the entire video.
3660  bits_per_second = 0.0;
3661  do {
3662  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3663  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3664  double desc_sec = desc_ns / nano_seconds_per_second;
3665  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3666 
3667  // Drop the bps by the percentage of bytes buffered.
3668  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3669  double mod_bits_per_second = calc_bits_per_second * percent;
3670 
3671  if (prebuffer < desc_sec) {
3672  double search_sec =
3673  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3674 
3675  // Add 1 so the bits per second should be a little bit greater than file
3676  // datarate.
3677  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3678  const double min_buffer = 0.0;
3679  double buffer = prebuffer;
3680  double sec_to_download = 0.0;
3681 
3682  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3683  min_buffer, &buffer, &sec_to_download,
3684  s, cues_start);
3685  if (rv < 0) {
3686  return -1;
3687  } else if (rv == 0) {
3688  bits_per_second = (double)(bps);
3689  break;
3690  }
3691  }
3692 
3693  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3694  } while (desc_end.start_time_ns != -1);
3695  }
3696  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3697  }
3698  return (int64_t)bandwidth;
3699 }
3700 
3701 static int webm_dash_manifest_cues(AVFormatContext *s)
3702 {
3703  MatroskaDemuxContext *matroska = s->priv_data;
3704  EbmlList *seekhead_list = &matroska->seekhead;
3705  MatroskaSeekhead *seekhead = seekhead_list->elem;
3706  char *buf;
3707  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3708  int i;
3709 
3710  // determine cues start and end positions
3711  for (i = 0; i < seekhead_list->nb_elem; i++)
3712  if (seekhead[i].id == MATROSKA_ID_CUES)
3713  break;
3714 
3715  if (i >= seekhead_list->nb_elem) return -1;
3716 
3717  before_pos = avio_tell(matroska->ctx->pb);
3718  cues_start = seekhead[i].pos + matroska->segment_start;
3719  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3720  // cues_end is computed as cues_start + cues_length + length of the
3721  // Cues element ID + EBML length of the Cues element. cues_end is
3722  // inclusive and the above sum is reduced by 1.
3723  uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3724  bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3725  bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3726  cues_end = cues_start + cues_length + bytes_read - 1;
3727  }
3728  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3729  if (cues_start == -1 || cues_end == -1) return -1;
3730 
3731  // parse the cues
3732  matroska_parse_cues(matroska);
3733 
3734  // cues start
3735  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3736 
3737  // cues end
3738  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3739 
3740  // bandwidth
3741  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3742  if (bandwidth < 0) return -1;
3743  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3744 
3745  // check if all clusters start with key frames
3746  av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3747 
3748  // store cue point timestamps as a comma separated list for checking subsegment alignment in
3749  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3750  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3751  if (!buf) return -1;
3752  strcpy(buf, "");
3753  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3754  snprintf(buf, (i + 1) * 20 * sizeof(char),
3755  "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3756  if (i != s->streams[0]->nb_index_entries - 1)
3757  strncat(buf, ",", sizeof(char));
3758  }
3759  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3760  av_free(buf);
3761 
3762  return 0;
3763 }
3764 
3765 static int webm_dash_manifest_read_header(AVFormatContext *s)
3766 {
3767  char *buf;
3768  int ret = matroska_read_header(s);
3769  MatroskaTrack *tracks;
3770  MatroskaDemuxContext *matroska = s->priv_data;
3771  if (ret) {
3772  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3773  return -1;
3774  }
3775 
3776  if (!matroska->is_live) {
3777  buf = av_asprintf("%g", matroska->duration);
3778  if (!buf) return AVERROR(ENOMEM);
3779  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3780  av_free(buf);
3781 
3782  // initialization range
3783  // 5 is the offset of Cluster ID.
3784  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, avio_tell(s->pb) - 5, 0);
3785  }
3786 
3787  // basename of the file
3788  buf = strrchr(s->filename, '/');
3789  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3790 
3791  // track number
3792  tracks = matroska->tracks.elem;
3793  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3794 
3795  // parse the cues and populate Cue related fields
3796  return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3797 }
3798 
3799 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
3800 {
3801  return AVERROR_EOF;
3802 }
3803 
3804 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3805 static const AVOption options[] = {
3806  { "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 },
3807  { NULL },
3808 };
3809 
3810 static const AVClass webm_dash_class = {
3811  .class_name = "WebM DASH Manifest demuxer",
3812  .item_name = av_default_item_name,
3813  .option = options,
3814  .version = LIBAVUTIL_VERSION_INT,
3815 };
3816 
3817 AVInputFormat ff_matroska_demuxer = {
3818  .name = "matroska,webm",
3819  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3820  .extensions = "mkv,mk3d,mka,mks",
3821  .priv_data_size = sizeof(MatroskaDemuxContext),
3822  .read_probe = matroska_probe,
3823  .read_header = matroska_read_header,
3824  .read_packet = matroska_read_packet,
3825  .read_close = matroska_read_close,
3826  .read_seek = matroska_read_seek,
3827  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3828 };
3829 
3830 AVInputFormat ff_webm_dash_manifest_demuxer = {
3831  .name = "webm_dash_manifest",
3832  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3833  .priv_data_size = sizeof(MatroskaDemuxContext),
3834  .read_header = webm_dash_manifest_read_header,
3835  .read_packet = webm_dash_manifest_read_packet,
3836  .read_close = matroska_read_close,
3837  .priv_class = &webm_dash_class,
3838 };
MATROSKA_ID_SEEKPREROLL
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
AV_CODEC_ID_PCM_S24BE
Definition: avcodec.h:430
MatroskaTrackVideo::color
MatroskaTrackVideoColor color
Definition: matroskadec.c:176
EbmlSyntax::s
const char * s
Definition: matroskadec.c:93
MatroskaTrack::codec_delay_in_track_tb
uint64_t codec_delay_in_track_tb
Definition: matroskadec.c:223
AVSEEK_FLAG_BACKWARD
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2386
AVCodecParameters::chroma_location
enum AVChromaLocation chroma_location
Definition: avcodec.h:4070
AV_DISPOSITION_METADATA
#define AV_DISPOSITION_METADATA
Definition: avformat.h:873
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#define NULL
Definition: coverity.c:32
MATROSKA_ID_BLOCKADDID
#define MATROSKA_ID_BLOCKADDID
Definition: matroska.h:223
MATROSKA_ID_TRACKDEFAULTDURATION
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:104
AVCodecParameters::field_order
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:4061
avio_wl16
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:446
matroska_parse_rm_audio
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:2727
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const char * s
Definition: avisynth_c.h:768
fourcc
uint32_t fourcc
Definition: hwcontext_qsv.c:90
AVIOContext
Bytestream IO Context.
Definition: avio.h:147
AVCodecParameters::color_trc
enum AVColorTransferCharacteristic color_trc
Definition: avcodec.h:4068
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Definition: matroska.h:121
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
MATROSKA_ID_VIDEOCOLOR_GX
#define MATROSKA_ID_VIDEOCOLOR_GX
Definition: matroska.h:147
matroska_blockgroup
static const EbmlSyntax matroska_blockgroup[]
Definition: matroskadec.c:673
MatroskaTrack::seek_preroll
uint64_t seek_preroll
Definition: matroskadec.c:217
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enum AVCodecID codec_id
Definition: ffmpeg_vaapi.c:149
AV_CODEC_ID_NONE
Definition: avcodec.h:192
ff_matroska_video_stereo_plane
const char *const ff_matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT]
Definition: matroska.c:145
matroska_simpletag
static const EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:604
matroska_convert_tags
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1478
MATROSKA_ID_DATEUTC
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
AV_CODEC_ID_PCM_S8
Definition: avcodec.h:421
AV_PKT_DATA_WEBVTT_IDENTIFIER
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1513
MatroskaTrack::type
uint64_t type
Definition: matroskadec.c:208
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static const EbmlSyntax matroska_tracks[]
Definition: matroskadec.c:532
MATROSKA_ID_TRACKFLAGLACING
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:101
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static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3799
h
h
Definition: vp9dsp_template.c:2093
MATROSKA_ID_TRACKENTRY
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
matroska_deliver_packet
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2563
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#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
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uint64_t version
Definition: matroskadec.c:110
AVOption
AVOption.
Definition: opt.h:245
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void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:145
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Definition: opengl_enc.c:101
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static int is_keyframe(NalUnitType naltype)
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av_add_index_entry
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:1945
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enum AVCodecID id
Definition: mxfenc.c:104
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static const EbmlSyntax matroska_info[]
Definition: matroskadec.c:384
MATROSKA_ID_CUETRACKPOSITION
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:185
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enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3012
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#define MATROSKA_ID_CODECPRIVATE
Definition: matroska.h:89
ff_sipr_subpk_size
const unsigned char ff_sipr_subpk_size[4]
Definition: rmsipr.c:25
MATROSKA_ID_TAGTARGETS_TYPE
#define MATROSKA_ID_TAGTARGETS_TYPE
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MatroskaTrackVideo::display_unit
uint64_t display_unit
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AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
ebml_level_end
static int ebml_level_end(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:774
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
INITIALIZATION_RANGE
#define INITIALIZATION_RANGE
Definition: matroska.h:356
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1621
matroska_ebmlnum_sint
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:995
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static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3494
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static const EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:614
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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:4560
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int64_t pos
Definition: avformat.h:820
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#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:166
MATROSKA_ID_AUDIOBITDEPTH
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:160
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uint64_t chapteruid
Definition: matroskadec.c:274
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static const EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:427
AVSEEK_FLAG_ANY
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2388
av_int2float
static av_always_inline float av_int2float(uint32_t i)
Reinterpret a 32-bit integer as a float.
Definition: intfloat.h:40
MATROSKA_ID_TRACKFLAGDEFAULT
#define MATROSKA_ID_TRACKFLAGDEFAULT
Definition: matroska.h:99
MatroskaBlock::additional_id
uint64_t additional_id
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EbmlList tag
Definition: matroskadec.c:280
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uint64_t uid
Definition: matroskadec.c:207
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static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
MatroskaDemuxContext::current_cluster
MatroskaCluster current_cluster
Definition: matroskadec.c:349
matroska_parse_frame
static int matroska_parse_frame(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int pkt_size, uint64_t timecode, uint64_t lace_duration, int64_t pos, int is_keyframe, uint8_t *additional, uint64_t additional_id, int additional_size, int64_t discard_padding)
Definition: matroskadec.c:3000
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3980
AVMasteringDisplayMetadata::white_point
AVRational white_point[2]
CIE 1931 xy chromaticity coords of white point.
Definition: mastering_display_metadata.h:47
AVStream::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:956
MATROSKA_ID_TAGTARGETS_ATTACHUID
#define MATROSKA_ID_TAGTARGETS_ATTACHUID
Definition: matroska.h:207
AVRational::num
int num
Numerator.
Definition: rational.h:59
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:890
MATROSKA_ID_CLUSTERPOSITION
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:218
b
const char * b
Definition: vf_curves.c:113
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
MATROSKA_ID_FILEDATA
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:239
AVStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1087
EBML_ID_DOCTYPEREADVERSION
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
MATROSKA_ID_BLOCKREFERENCE
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:230
MatroskaTrack::flag_forced
uint64_t flag_forced
Definition: matroskadec.c:216
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
Ebml::max_size
uint64_t max_size
Definition: matroskadec.c:111
MATROSKA_ID_TRACKTYPE
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
MATROSKA_ID_TAGTARGETS_CHAPTERUID
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:206
AV_CODEC_ID_FLAC
Definition: avcodec.h:528
MatroskaTrack::flag_default
uint64_t flag_default
Definition: matroskadec.c:215
MATROSKA_ID_VIDEOCOLOR_RX
#define MATROSKA_ID_VIDEOCOLOR_RX
Definition: matroska.h:145
av_fast_padded_malloc
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:120
MATROSKA_ID_VIDEOASPECTRATIO
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:125
matroska_track_encodings
static const EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:481
MATROSKA_ID_MUXINGAPP
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
MATROSKA_ID_AUDIOCHANNELS
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:161
MatroskaTag::name
char * name
Definition: matroskadec.c:263
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
AVMasteringDisplayMetadata::has_primaries
int has_primaries
Flag indicating whether the display primaries (and white point) are set.
Definition: mastering_display_metadata.h:62
av_get_codec_tag_string
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
Put a string representing the codec tag codec_tag in buf.
Definition: utils.c:3166
version
int version
Definition: avisynth_c.h:766
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
AVDISCARD_ALL
discard all
Definition: avcodec.h:787
AV_CODEC_ID_PRORES
Definition: avcodec.h:345
MatroskaDemuxContext::levels
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:310
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
MATROSKA_ID_CUECLUSTERPOSITION
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:189
MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX
Definition: matroska.h:153
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:742
MatroskaTrack::audio
MatroskaTrackAudio audio
Definition: matroskadec.c:219
AV_RB16
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
MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ
#define MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ
Definition: matroska.h:135
MatroskaBlock::duration
uint64_t duration
Definition: matroskadec.c:359
EbmlSyntax::n
const struct EbmlSyntax * n
Definition: matroskadec.c:94
MATROSKA_ID_EDITIONFLAGDEFAULT
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:253
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
MATROSKA_ID_CLUSTERTIMECODE
#define MATROSKA_ID_CLUSTERTIMECODE
Definition: matroska.h:217
EBML_ID_DOCTYPE
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
AVFormatContext::strict_std_compliance
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1622
AV_CODEC_ID_ALAC
Definition: avcodec.h:532
MATROSKA_ID_ENCODINGENCALGO
#define MATROSKA_ID_ENCODINGENCALGO
Definition: matroska.h:173
MATROSKA_ID_CHAPTERTIMEEND
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:246
AVCodecParameters::color_space
enum AVColorSpace color_space
Definition: avcodec.h:4069
matroska_track_plane
static const EbmlSyntax matroska_track_plane[]
Definition: matroskadec.c:486
MATROSKA_ID_TRACKCONTENTENCODINGS
#define MATROSKA_ID_TRACKCONTENTENCODINGS
Definition: matroska.h:105
AV_CODEC_ID_WAVPACK
Definition: avcodec.h:541
AVCodecParameters::frame_size
int frame_size
Audio only.
Definition: avcodec.h:4101
AV_CODEC_ID_COOK
Definition: avcodec.h:536
AV_PKT_DATA_MASTERING_DISPLAY_METADATA
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1539
AV_LZO_OUTPUT_FULL
#define AV_LZO_OUTPUT_FULL
decoded data did not fit into output buffer
Definition: lzo.h:39
avpriv_new_chapter
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:4317
EBML_VERSION
#define EBML_VERSION
Definition: matroska.h:30
MATROSKA_ID_FILEDESC
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:236
AVFormatContext
Format I/O context.
Definition: avformat.h:1338
EBML_ID_CRC32
#define EBML_ID_CRC32
Definition: matroska.h:46
MatroskaTag::def
uint64_t def
Definition: matroskadec.c:266
uid
UID uid
Definition: mxfenc.c:1819
ff_update_cur_dts
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:1859
MATROSKA_ID_TRACKCONTENTENCODING
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:106
matroska_cluster
static const EbmlSyntax matroska_cluster[]
Definition: matroskadec.c:685
MATROSKA_ID_CODECDOWNLOADURL
#define MATROSKA_ID_CODECDOWNLOADURL
Definition: matroska.h:92
AVClass::class_name
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
AV_WB64
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
MatroskaTrack::end_timecode
int64_t end_timecode
Definition: matroskadec.c:226
webm_dash_manifest_read_header
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:3765
ebml_read_sint
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
Definition: matroskadec.c:875
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AVFMT_FLAG_IGNIDX
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1451
dict.h
Public dictionary API.
avpriv_dict_set_timestamp
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
ffio_limit
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:226
matroska_chapters
static const EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:579
matroska_find_level1_elem
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1091
MatroskaTrackVideo::pixel_height
uint64_t pixel_height
Definition: matroskadec.c:169
avio_wl32
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:346
bits
uint8_t bits
Definition: crc.c:296
av_int2double
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint8_t
uint8_t
Definition: audio_convert.c:194
MATROSKA_ID_VIDEOCOLOR_BX
#define MATROSKA_ID_VIDEOCOLOR_BX
Definition: matroska.h:149
MATROSKA_ID_CHAPLANG
#define MATROSKA_ID_CHAPLANG
Definition: matroska.h:249
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
MatroskaTrackVideo::stereo_mode
uint64_t stereo_mode
Definition: matroskadec.c:174
MatroskaTrack::operation
MatroskaTrackOperation operation
Definition: matroskadec.c:220
MatroskaTrack::video
MatroskaTrackVideo video
Definition: matroskadec.c:218
MATROSKA_ID_EDITIONFLAGORDERED
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:254
AVCodecParameters::width
int width
Video only.
Definition: avcodec.h:4046
get_cue_desc
static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start)
Definition: matroskadec.c:3465
aac_profiles
static const AVProfile aac_profiles[]
Definition: audiotoolboxenc.c:571
EbmlList::elem
void * elem
Definition: matroskadec.c:100
opt.h
AVOptions.
MATROSKA_ID_TRACKLANGUAGE
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:97
MatroskaTrackEncoding::compression
MatroskaTrackCompression compression
Definition: matroskadec.c:130
EbmlBin::data
uint8_t * data
Definition: matroskadec.c:105
webm_dash_manifest_cues
static int webm_dash_manifest_cues(AVFormatContext *s)
Definition: matroskadec.c:3701
ff_codec_movvideo_tags
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:72
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:757
AVPALETTE_SIZE
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
MatroskaIndex::time
uint64_t time
Definition: matroskadec.c:258
ff_mkv_stereo3d_conv
int ff_mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
Definition: matroska.c:151
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AV_CODEC_ID_ATRAC3
Definition: avcodec.h:547
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1619
MATROSKA_ID_VIDEOPIXELCROPT
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:117
matroska_track_video_color
static const EbmlSyntax matroska_track_video_color[]
Definition: matroskadec.c:409
TRACK_NUMBER
#define TRACK_NUMBER
Definition: matroska.h:364
MATROSKA_ID_TIMECODESCALE
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
matroska_aac_sri
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1685
AVStream::need_parsing
enum AVStreamParseType need_parsing
Definition: avformat.h:1076
AV_CODEC_ID_WEBVTT
Definition: avcodec.h:623
MATROSKA_ID_VIDEOCOLORCBSUBVERT
#define MATROSKA_ID_VIDEOCOLORCBSUBVERT
Definition: matroska.h:134
AV_CODEC_ID_AAC
Definition: avcodec.h:518
MATROSKA_ID_SIMPLEBLOCK
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:225
MATROSKA_ID_TAGTARGETS_TYPEVALUE
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:204
MATROSKA_ID_EDITIONFLAGHIDDEN
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:252
AV_LZO_OUTPUT_PADDING
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
AV_CODEC_ID_RA_144
Definition: avcodec.h:504
matroska_segment
static const EbmlSyntax matroska_segment[]
Definition: matroskadec.c:645
MatroskaAttachment::stream
AVStream * stream
Definition: matroskadec.c:240
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4193
MATROSKA_ID_CODECNAME
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
MatroskaTrack::language
char * language
Definition: matroskadec.c:212
MATROSKA_ID_BLOCKMORE
#define MATROSKA_ID_BLOCKMORE
Definition: matroska.h:222
AV_RB32
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_RB32
Definition: bytestream.h:87
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1406
duration
int64_t duration
Definition: movenc.c:63
MATROSKA_ID_CUERELATIVEPOSITION
#define MATROSKA_ID_CUERELATIVEPOSITION
Definition: matroska.h:190
MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:158
MATROSKA_ID_VIDEOCOLOR
#define MATROSKA_ID_VIDEOCOLOR
Definition: matroska.h:127
AVCodecParameters::initial_padding
int initial_padding
Audio only.
Definition: avcodec.h:4109
avio_internal.h
matroska_segments
static const EbmlSyntax matroska_segments[]
Definition: matroskadec.c:657
av_dict_get
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
AVFormatContext::flags
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1449
AVPacket::data
uint8_t * data
Definition: avcodec.h:1601
MatroskaTagTarget::typevalue
uint64_t typevalue
Definition: matroskadec.c:272
MatroskaTrack::codec_delay
uint64_t codec_delay
Definition: matroskadec.c:222
matroska_parse_cluster_incremental
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3253
inflate
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord)
Definition: vf_neighbor.c:129
MATROSKA_ID_VIDEODISPLAYWIDTH
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:112
MATROSKA_ID_EDITIONUID
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:251
ff_vorbis_comment
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
Definition: oggparsevorbis.c:87
MATROSKA_ID_BLOCKADDITIONS
#define MATROSKA_ID_BLOCKADDITIONS
Definition: matroska.h:221
tag
uint32_t tag
Definition: movenc.c:1382
matroska_index
static const EbmlSyntax matroska_index[]
Definition: matroskadec.c:599
CueDesc::start_time_ns
int64_t start_time_ns
Definition: matroskadec.c:3455
EbmlSyntax::def
union EbmlSyntax::@208 def
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
MATROSKA_ID_CODECDECODEALL
#define MATROSKA_ID_CODECDECODEALL
Definition: matroska.h:93
MATROSKA_ID_ENCODINGENCRYPTION
#define MATROSKA_ID_ENCODINGENCRYPTION
Definition: matroska.h:171
CodecMime::id
enum AVCodecID id
Definition: internal.h:51
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
MATROSKA_ID_CUES
#define MATROSKA_ID_CUES
Definition: matroska.h:58
EBML_MAX_DEPTH
#define EBML_MAX_DEPTH
Definition: matroska.h:344
mkv_parse_video_color
static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track)
Definition: matroskadec.c:1808
size
ptrdiff_t size
Definition: opengl_enc.c:101
avio_rb64
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:824
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
av_reduce
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
AVMasteringDisplayMetadata::has_luminance
int has_luminance
Flag indicating whether the luminance (min_ and max_) have been set.
Definition: mastering_display_metadata.h:67
header
static const uint8_t header[24]
Definition: sdr2.c:67
MATROSKA_ID_TRACKNUMBER
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
MATROSKA_ID_VIDEOCOLOR_WHITEY
#define MATROSKA_ID_VIDEOCOLOR_WHITEY
Definition: matroska.h:152
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:204
AV_CODEC_ID_SUBRIP
Definition: avcodec.h:622
av_realloc_array
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:208
MATROSKA_ID_SEGMENTUID
#define MATROSKA_ID_SEGMENTUID
Definition: matroska.h:72
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4082
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:604
ff_get_wav_header
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:88
AV_DISPOSITION_CAPTIONS
#define AV_DISPOSITION_CAPTIONS
To specify text track kind (different from subtitles default).
Definition: avformat.h:871
MatroskaTag::sub
EbmlList sub
Definition: matroskadec.c:267
matroska_parse_seekhead_entry
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, uint64_t pos)
Definition: matroskadec.c:1543
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:4009
FF_COMPLIANCE_UNOFFICIAL
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2898
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1633
matroska_parse_cluster
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3311
ebml_parse_nest
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1047
MATROSKA_ID_CUEBLOCKNUMBER
#define MATROSKA_ID_CUEBLOCKNUMBER
Definition: matroska.h:192
MATROSKA_ID_TRACKUID
#define MATROSKA_ID_TRACKUID
Definition: matroska.h:79
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
MatroskaTrackVideo::display_height
uint64_t display_height
Definition: matroskadec.c:167
U
#define U(x)
Definition: vp56_arith.h:37
MATROSKA_ID_ENCODINGORDER
#define MATROSKA_ID_ENCODINGORDER
Definition: matroska.h:164
MATROSKA_ID_VIDEOSTEREOMODE
#define MATROSKA_ID_VIDEOSTEREOMODE
Definition: matroska.h:123
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:827
FILENAME
#define FILENAME
Definition: matroska.h:359
EbmlSyntax::type
EbmlType type
Definition: matroskadec.c:87
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:191
MATROSKA_ID_VIDEOCOLOR_BY
#define MATROSKA_ID_VIDEOCOLOR_BY
Definition: matroska.h:150
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVFormatContext::metadata
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1554
MATROSKA_ID_BLOCKDURATION
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:229
CueDesc::end_offset
int64_t end_offset
Definition: matroskadec.c:3458
AV_PKT_DATA_PALETTE
Definition: avcodec.h:1363
EBML_ID_EBMLREADVERSION
#define EBML_ID_EBMLREADVERSION
Definition: matroska.h:37
av_index_search_timestamp
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:2054
MATROSKA_ID_VIDEOCOLORMAXCLL
#define MATROSKA_ID_VIDEOCOLORMAXCLL
Definition: matroska.h:141
MatroskaTrackVideoColor::mastering_meta
MatroskaMasteringMeta mastering_meta
Definition: matroskadec.c:161
MATROSKA_ID_VIDEOCOLOR_WHITEX
#define MATROSKA_ID_VIDEOCOLOR_WHITEX
Definition: matroska.h:151
mask
static const uint16_t mask[17]
Definition: lzw.c:38
flac.h
FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.
ebml_read_length
static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb, uint64_t *number)
Read a EBML length value.
Definition: matroskadec.c:843
av_default_item_name
av_default_item_name
Definition: libopenh264enc.c:78
MatroskaChapter::chapter
AVChapter * chapter
Definition: matroskadec.c:249
AVERROR
#define AVERROR(e)
Definition: error.h:43
AVIndexEntry::timestamp
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:821
MATROSKA_ID_CLUSTER
#define MATROSKA_ID_CLUSTER
Definition: matroska.h:62
MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT
#define MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT
Definition: matroska.h:136
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
AVCodecParameters::color_primaries
enum AVColorPrimaries color_primaries
Definition: avcodec.h:4067
MATROSKA_ID_FILEMIMETYPE
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:238
matroska_track_encoding
static const EbmlSyntax matroska_track_encoding[]
Definition: matroskadec.c:472
matroska_ebmlnum_uint
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num)
Definition: matroskadec.c:984
r
const char * r
Definition: vf_curves.c:111
MatroskaTrackVideo::display_width
uint64_t display_width
Definition: matroskadec.c:166
MATROSKA_ID_WRITINGAPP
#define MATROSKA_ID_WRITINGAPP
Definition: matroska.h:69
matroska_parse_block
static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size, int64_t pos, uint64_t cluster_time, uint64_t block_duration, int is_keyframe, uint8_t *additional, uint64_t additional_id, int additional_size, int64_t cluster_pos, int64_t discard_padding)
Definition: matroskadec.c:3117
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
MatroskaBlock::additional
EbmlBin additional
Definition: matroskadec.c:364
ff_matroska_video_stereo_mode
const char *const ff_matroska_video_stereo_mode[MATROSKA_VIDEO_STEREOMODE_TYPE_NB]
Definition: matroska.c:127
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:517
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3976
MATROSKA_ID_TAGDEFAULT_BUG
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:201
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:196
CodecTags::id
enum AVCodecID id
Definition: matroska.h:340
MATROSKA_ID_VIDEOPIXELCROPR
#define MATROSKA_ID_VIDEOPIXELCROPR
Definition: matroska.h:119
MATROSKA_ID_TRACKPLANEUID
#define MATROSKA_ID_TRACKPLANEUID
Definition: matroska.h:86
length
GLsizei GLsizei * length
Definition: opengl_enc.c:115
round
static av_always_inline av_const double round(double x)
Definition: libm.h:444
MATROSKA_ID_ENCODINGCOMPSETTINGS
#define MATROSKA_ID_ENCODINGCOMPSETTINGS
Definition: matroska.h:169
EBML_ID_EBMLMAXIDLENGTH
#define EBML_ID_EBMLMAXIDLENGTH
Definition: matroska.h:38
MATROSKA_ID_CHAPTERFLAGHIDDEN
#define MATROSKA_ID_CHAPTERFLAGHIDDEN
Definition: matroska.h:256
matroska_index_entry
static const EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c:593
matroska_chapter_entry
static const EbmlSyntax matroska_chapter_entry[]
Definition: matroskadec.c:558
offset
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
av_base64_encode
char * av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size)
Encode data to base64 and null-terminate.
Definition: base64.c:138
AVStream::avg_frame_rate
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:967
MatroskaCluster::timecode
uint64_t timecode
Definition: matroskadec.c:294
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
AVMasteringDisplayMetadata::max_luminance
AVRational max_luminance
Max luminance of mastering display (cd/m^2).
Definition: mastering_display_metadata.h:57
av_strlcpy
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
fail
#define fail()
Definition: checkasm.h:83
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1607
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3998
AVSTREAM_PARSE_HEADERS
Only parse headers, do not repack.
Definition: avformat.h:811
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:595
ebml_free
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1218
ff_mkv_mime_tags
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:111
EbmlList::nb_elem
int nb_elem
Definition: matroskadec.c:99
MATROSKA_ID_TAG
#define MATROSKA_ID_TAG
Definition: matroska.h:195
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:464
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
MatroskaTag::lang
char * lang
Definition: matroskadec.c:265
matroska_seekhead_entry
static const EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:634
AV_DISPOSITION_FORCED
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:848
MATROSKA_ID_ENCODINGSIGHASHALGO
#define MATROSKA_ID_ENCODINGSIGHASHALGO
Definition: matroska.h:176
transfer_characteristics
static const struct TransferCharacteristics transfer_characteristics[AVCOL_TRC_NB]
Definition: vf_colorspace.c:228
MatroskaDemuxContext::skip_to_timecode
uint64_t skip_to_timecode
Definition: matroskadec.c:338
algo
Definition: dct.c:52
AVCodecParameters::block_align
int block_align
Audio only.
Definition: avcodec.h:4097
matroska_read_header
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:2405
matroska_parse_cues
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1655
matroska_mastering_meta
static const EbmlSyntax matroska_mastering_meta[]
Definition: matroskadec.c:395
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
matroska_execute_seekhead
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1588
MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN
Definition: matroska.h:154
dynarray_add
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:183
MatroskaChapter::start
uint64_t start
Definition: matroskadec.c:244
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3175
EBML_ID_EBMLVERSION
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
AVFormatContext::filename
char filename[1024]
input or output filename
Definition: avformat.h:1414
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
AV_BASE64_SIZE
#define AV_BASE64_SIZE(x)
Calculate the output size needed to base64-encode x bytes to a null-terminated string.
Definition: base64.h:66
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:248
matroska_clusters
static const EbmlSyntax matroska_clusters[]
Definition: matroskadec.c:694
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
MATROSKA_ID_TAGTARGETS
#define MATROSKA_ID_TAGTARGETS
Definition: matroska.h:202
MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL
#define MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL
Definition: matroska.h:130
ff_codec_bmp_tags
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
MatroskaDemuxContext::packets
AVPacket ** packets
Definition: matroskadec.c:330
MATROSKA_VIDEO_STEREO_PLANE_COUNT
#define MATROSKA_VIDEO_STEREO_PLANE_COUNT
Definition: matroska.h:346
interlaced
uint8_t interlaced
Definition: mxfenc.c:1822
MATROSKA_ID_TAGNAME
#define MATROSKA_ID_TAGNAME
Definition: matroska.h:197
AVMasteringDisplayMetadata::min_luminance
AVRational min_luminance
Min luminance of mastering display (cd/m^2).
Definition: mastering_display_metadata.h:52
MATROSKA_ID_TRACKTIMECODESCALE
#define MATROSKA_ID_TRACKTIMECODESCALE
Definition: matroska.h:107
read_probe
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
ebml_parse_elem
static int ebml_parse_elem(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1126
ebml_read_num
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:797
matroska_track_combine_planes
static const EbmlSyntax matroska_track_combine_planes[]
Definition: matroskadec.c:492
MATROSKA_ID_CHAPTERFLAGENABLED
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:257
Ebml::id_length
uint64_t id_length
Definition: matroskadec.c:112
matroska_find_track_by_num
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num)
Definition: matroskadec.c:1293
bit_depth
static void bit_depth(AudioStatsContext *s, uint64_t mask, uint64_t imask, AVRational *depth)
Definition: af_astats.c:150
AV_FIELD_TB
Definition: avcodec.h:1659
CLUSTER_KEYFRAME
#define CLUSTER_KEYFRAME
Definition: matroska.h:362
MATROSKA_ID_SIMPLETAG
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:196
Ebml::doctype_version
uint64_t doctype_version
Definition: matroskadec.c:114
riff.h
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
AV_OPT_TYPE_BOOL
Definition: opt.h:239
AV_CODEC_ID_RV10
Definition: avcodec.h:202
MATROSKA_ID_TRACKMAXCACHE
#define MATROSKA_ID_TRACKMAXCACHE
Definition: matroska.h:103
DURATION
#define DURATION
Definition: matroska.h:361
EbmlSyntax::data_offset
int data_offset
Definition: matroskadec.c:89
AV_CODEC_ID_RV20
Definition: avcodec.h:203
MATROSKA_ID_CHAPTERPHYSEQUIV
#define MATROSKA_ID_CHAPTERPHYSEQUIV
Definition: matroska.h:258
matroska_read_close
static int matroska_read_close(AVFormatContext *s)
Definition: matroskadec.c:3437
FLAC_STREAMINFO_SIZE
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
MatroskaTrack::codec_priv
EbmlBin codec_priv
Definition: matroskadec.c:211
ebml_read_ascii
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
Definition: matroskadec.c:917
ebml_syntax
static const EbmlSyntax ebml_syntax[]
Definition: matroskadec.c:379
matroska_decode_buffer
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1307
MATROSKA_ID_CHAPTERATOM
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:244
OFFSET
#define OFFSET(x)
Definition: matroskadec.c:3804
av_lzo1x_decode
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
Definition: lzo.c:134
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2975
n
int n
Definition: avisynth_c.h:684
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:958
av_stream_new_side_data
uint8_t * av_stream_new_side_data(AVStream *stream, enum AVPacketSideDataType type, int size)
Allocate new information from stream.
Definition: utils.c:5093
matroska_chapter
static const EbmlSyntax matroska_chapter[]
Definition: matroskadec.c:570
AV_CODEC_ID_OPUS
Definition: avcodec.h:579
AVCodecParameters::color_range
enum AVColorRange color_range
Video only.
Definition: avcodec.h:4066
AVMEDIA_TYPE_ATTACHMENT
Opaque data information usually sparse.
Definition: avutil.h:199
MATROSKA_ID_VIDEOCOLORSPACE
#define MATROSKA_ID_VIDEOCOLORSPACE
Definition: matroska.h:126
MATROSKA_ID_CHAPTERS
#define MATROSKA_ID_CHAPTERS
Definition: matroska.h:63
matroska_probe
static int matroska_probe(AVProbeData *p)
Definition: matroskadec.c:1251
EBML_ID_VOID
#define EBML_ID_VOID
Definition: matroska.h:45
src
#define src
Definition: vp9dsp.c:530
mkv_stereo_mode_display_mul
static void mkv_stereo_mode_display_mul(int stereo_mode, int *h_width, int *h_height)
Definition: matroskadec.c:1783
matroska_convert_tag
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1443
MatroskaTrack::max_block_additional_id
uint64_t max_block_additional_id
Definition: matroskadec.c:228
AV_CODEC_ID_PCM_S16BE
Definition: avcodec.h:418
MATROSKA_ID_VIDEOCOLORCHROMASUBVERT
#define MATROSKA_ID_VIDEOCOLORCHROMASUBVERT
Definition: matroska.h:132
ff_log2_tab
const uint8_t ff_log2_tab[256]
Definition: log2_tab.c:23
MATROSKA_ID_AUDIOSAMPLINGFREQ
#define MATROSKA_ID_AUDIOSAMPLINGFREQ
Definition: matroska.h:157
AV_FIELD_TT
Definition: avcodec.h:1657
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:36
AV_DISPOSITION_ATTACHED_PIC
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:859
EbmlSyntax::f
double f
Definition: matroskadec.c:92
MATROSKA_ID_TRACKMINCACHE
#define MATROSKA_ID_TRACKMINCACHE
Definition: matroska.h:102
AVCOL_RANGE_JPEG
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:460
matroska_metadata_creation_time
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
Definition: matroskadec.c:1695
matroska_parse_flac
static int matroska_parse_flac(AVFormatContext *s, MatroskaTrack *track, int *offset)
Definition: matroskadec.c:1701
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:514
matroska_read_seek
static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: matroskadec.c:3357
AVStream
Stream structure.
Definition: avformat.h:889
matroska_parse_wavpack
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:2804
AV_CODEC_ID_PCM_U8
Definition: avcodec.h:422
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
MATROSKA_ID_TRACKPLANETYPE
#define MATROSKA_ID_TRACKPLANETYPE
Definition: matroska.h:87
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
matroska_tags
static const EbmlSyntax matroska_tags[]
Definition: matroskadec.c:629
MatroskaTrack::encodings
EbmlList encodings
Definition: matroskadec.c:221
CUES_END
#define CUES_END
Definition: matroska.h:358
MatroskaTrack::codec_id
char * codec_id
Definition: matroskadec.c:210
AV_DISPOSITION_DEFAULT
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:836
matroska_track_operation
static const EbmlSyntax matroska_track_operation[]
Definition: matroskadec.c:497
matroska_cluster_incremental
static const EbmlSyntax matroska_cluster_incremental[]
Definition: matroskadec.c:717
MatroskaDemuxContext::current_cluster_pos
int64_t current_cluster_pos
Definition: matroskadec.c:348
MATROSKA_ID_VIDEOPIXELCROPB
#define MATROSKA_ID_VIDEOPIXELCROPB
Definition: matroska.h:116
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
MATROSKA_ID_VIDEOCOLORMATRIXCOEFF
#define MATROSKA_ID_VIDEOCOLORMATRIXCOEFF
Definition: matroska.h:129
matroska_parse_tracks
static int matroska_parse_tracks(AVFormatContext *s)
Definition: matroskadec.c:1908
AV_DISPOSITION_DESCRIPTIONS
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:872
ff_get_qtpalette
int ff_get_qtpalette(int codec_id, AVIOContext *pb, uint32_t *palette)
Retrieve the palette (or "color table" in QuickTime terms), either from the video sample description...
Definition: qtpalette.c:31
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:267
MATROSKA_ID_TRACKFLAGFORCED
#define MATROSKA_ID_TRACKFLAGFORCED
Definition: matroska.h:100
MATROSKA_ID_TAGS
#define MATROSKA_ID_TAGS
Definition: matroska.h:59
MATROSKA_ID_VIDEOCOLORPRIMARIES
#define MATROSKA_ID_VIDEOCOLORPRIMARIES
Definition: matroska.h:140
ff_codec_movaudio_tags
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom.c:296
ebml_read_master
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
Definition: matroskadec.c:962
MATROSKA_ID_TAGDEFAULT
#define MATROSKA_ID_TAGDEFAULT
Definition: matroska.h:200
BANDWIDTH
#define BANDWIDTH
Definition: matroska.h:360
MATROSKA_ID_SEEKID
#define MATROSKA_ID_SEEKID
Definition: matroska.h:213
matroska_track_encoding_compression
static const EbmlSyntax matroska_track_encoding_compression[]
Definition: matroskadec.c:456
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1380
mastering_display_metadata.h
matroska_track
static const EbmlSyntax matroska_track[]
Definition: matroskadec.c:502
av_make_q
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
MATROSKA_ID_ENCODINGCOMPALGO
#define MATROSKA_ID_ENCODINGCOMPALGO
Definition: matroska.h:168
MATROSKA_ID_BLOCK
#define MATROSKA_ID_BLOCK
Definition: matroska.h:228
MATROSKA_ID_INFO
#define MATROSKA_ID_INFO
Definition: matroska.h:56
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:567
AV_CODEC_ID_AC3
Definition: avcodec.h:519
MATROSKA_ID_TAGTARGETS_TRACKUID
#define MATROSKA_ID_TAGTARGETS_TRACKUID
Definition: matroska.h:205
ebml_header
static const EbmlSyntax ebml_header[]
Definition: matroskadec.c:368
CUE_TIMESTAMPS
#define CUE_TIMESTAMPS
Definition: matroska.h:363
MATROSKA_ID_TAGLANG
#define MATROSKA_ID_TAGLANG
Definition: matroska.h:199
MatroskaTrackVideo::pixel_width
uint64_t pixel_width
Definition: matroskadec.c:168
MATROSKA_ID_TRACKCOMBINEPLANES
#define MATROSKA_ID_TRACKCOMBINEPLANES
Definition: matroska.h:84
webm_dash_class
static const AVClass webm_dash_class
Definition: matroskadec.c:3810
AV_CODEC_ID_RV30
Definition: avcodec.h:265
CueDesc::start_offset
int64_t start_offset
Definition: matroskadec.c:3457
MATROSKA_ID_TRACKFLAGENABLED
#define MATROSKA_ID_TRACKFLAGENABLED
Definition: matroska.h:98
MATROSKA_ID_TRACKS
#define MATROSKA_ID_TRACKS
Definition: matroska.h:57
buf
void * buf
Definition: avisynth_c.h:690
MATROSKA_ID_TRACKPLANE
#define MATROSKA_ID_TRACKPLANE
Definition: matroska.h:85
AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL
Data found in BlockAdditional element of matroska container.
Definition: avcodec.h:1508
MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ
#define MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ
Definition: matroska.h:131
type
GLint GLenum type
Definition: opengl_enc.c:105
MATROSKA_ID_TRACKNAME
#define MATROSKA_ID_TRACKNAME
Definition: matroska.h:96
MatroskaLevel::start
uint64_t start
Definition: matroskadec.c:289
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
AVStream::nb_index_entries
int nb_index_entries
Definition: avformat.h:1089
MATROSKA_ID_SEEKENTRY
#define MATROSKA_ID_SEEKENTRY
Definition: matroska.h:210
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
MatroskaIndex::pos
EbmlList pos
Definition: matroskadec.c:259
EbmlSyntax::u
uint64_t u
Definition: matroskadec.c:91
MATROSKA_ID_CHAPCOUNTRY
#define MATROSKA_ID_CHAPCOUNTRY
Definition: matroska.h:250
AV_WB32
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
AV_CODEC_ID_TTA
Definition: avcodec.h:538
MATROSKA_ID_EDITIONENTRY
#define MATROSKA_ID_EDITIONENTRY
Definition: matroska.h:243
index
int index
Definition: gxfenc.c:89
matroska_blockadditions
static const EbmlSyntax matroska_blockadditions[]
Definition: matroskadec.c:668
MATROSKA_ID_BLOCKGROUP
#define MATROSKA_ID_BLOCKGROUP
Definition: matroska.h:220
MATROSKA_ID_VIDEOPIXELHEIGHT
#define MATROSKA_ID_VIDEOPIXELHEIGHT
Definition: matroska.h:115
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
isnan
#define isnan(x)
Definition: libm.h:340
AVMasteringDisplayMetadata
Copyright (c) 2016 Neil Birkbeck neil.birkbeck@gmail.com
Definition: mastering_display_metadata.h:38
MATROSKA_ID_CUEDURATION
#define MATROSKA_ID_CUEDURATION
Definition: matroska.h:191
MatroskaTrack::stream
AVStream * stream
Definition: matroskadec.c:225
matroska_parse_laces
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, int *buf_size, int type, uint32_t **lace_buf, int *laces)
Definition: matroskadec.c:2618
MATROSKA_ID_CUETIME
#define MATROSKA_ID_CUETIME
Definition: matroska.h:184
AV_OPT_FLAG_DECODING_PARAM
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:276
MATROSKA_ID_ENCODINGSIGALGO
#define MATROSKA_ID_ENCODINGSIGALGO
Definition: matroska.h:175
matroska_read_packet
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3341
AV_PKT_DATA_SKIP_SAMPLES
Recommmends skipping the specified number of samples.
Definition: avcodec.h:1473
AV_CODEC_ID_RV40
Definition: avcodec.h:266
get_qt_codec
static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
Definition: matroskadec.c:1881
ebml_parse
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1031
flac_parse_block_header
static av_always_inline void flac_parse_block_header(const uint8_t *block_header, int *last, int *type, int *size)
Parse the metadata block parameters from the header.
Definition: flac.h:143
MATROSKA_ID_ENCODINGSIGKEYID
#define MATROSKA_ID_ENCODINGSIGKEYID
Definition: matroska.h:177
AV_CODEC_ID_PCM_S24LE
Definition: avcodec.h:429
MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS
#define MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS
Definition: matroska.h:138
MATROSKA_ID_TITLE
#define MATROSKA_ID_TITLE
Definition: matroska.h:68
snprintf
#define snprintf
Definition: snprintf.h:34
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:471
MatroskaDemuxContext::ctx
AVFormatContext * ctx
Definition: matroskadec.c:306
MATROSKA_ID_TRACKVIDEO
#define MATROSKA_ID_TRACKVIDEO
Definition: matroska.h:81
MatroskaBlock::discard_padding
int64_t discard_padding
Definition: matroskadec.c:365
EbmlBin::size
int size
Definition: matroskadec.c:104
matroska_attachments
static const EbmlSyntax matroska_attachments[]
Definition: matroskadec.c:546
AVIOContext::error
int error
contains the error code or 0 if no error happened
Definition: avio.h:228
matroska_clusters_incremental
static const EbmlSyntax matroska_clusters_incremental[]
Definition: matroskadec.c:726
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
AV_CODEC_ID_RA_288
Definition: avcodec.h:505
MATROSKA_ID_VIDEOCOLORMASTERINGMETA
#define MATROSKA_ID_VIDEOCOLORMASTERINGMETA
Definition: matroska.h:144
ebml_parse_id
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, uint32_t id, void *data)
Definition: matroskadec.c:1014
AV_CODEC_ID_PCM_F64LE
Definition: avcodec.h:440
EbmlSyntax::list_elem_size
int list_elem_size
Definition: matroskadec.c:88
av_strlcat
size_t av_strlcat(char *dst, const char *src, size_t size)
Append the string src to the string dst, but to a total length of no more than size - 1 bytes...
Definition: avstring.c:93
matroska_cluster_incremental_parsing
static const EbmlSyntax matroska_cluster_incremental_parsing[]
Definition: matroskadec.c:703
AVMasteringDisplayMetadata::display_primaries
AVRational display_primaries[3][2]
CIE 1931 xy chromaticity coords of color primaries (r, g, b order).
Definition: mastering_display_metadata.h:42
AV_CODEC_ID_HEVC
Definition: avcodec.h:371
profile
mfxU16 profile
Definition: qsvenc.c:42
MatroskaTrackVideo::field_order
uint64_t field_order
Definition: matroskadec.c:173
AVPALETTE_COUNT
#define AVPALETTE_COUNT
Definition: pixfmt.h:33
AVCodecParameters::seek_preroll
int seek_preroll
Audio only.
Definition: avcodec.h:4120
MATROSKA_ID_VIDEOFRAMERATE
#define MATROSKA_ID_VIDEOFRAMERATE
Definition: matroska.h:111
CueDesc::end_time_ns
int64_t end_time_ns
Definition: matroskadec.c:3456
sign_extend
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:139
MATROSKA_ID_ATTACHMENTS
#define MATROSKA_ID_ATTACHMENTS
Definition: matroska.h:61
AV_FIELD_PROGRESSIVE
Definition: avcodec.h:1656
matroska_chapter_display
static const EbmlSyntax matroska_chapter_display[]
Definition: matroskadec.c:551
MATROSKA_ID_TRACKOPERATION
#define MATROSKA_ID_TRACKOPERATION
Definition: matroska.h:83
EbmlBin::pos
int64_t pos
Definition: matroskadec.c:106
matroska_blockmore
static const EbmlSyntax matroska_blockmore[]
Definition: matroskadec.c:662
MATROSKA_ID_CHAPTERDISPLAY
#define MATROSKA_ID_CHAPTERDISPLAY
Definition: matroska.h:247
flags
static int flags
Definition: cpu.c:47
matroska_track_audio
static const EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:448
MatroskaDemuxContext::level1_elems
MatroskaLevel1Element level1_elems[64]
Definition: matroskadec.c:344
level
uint8_t level
Definition: svq3.c:207
AV_FIELD_BB
Definition: avcodec.h:1658
MATROSKA_ID_FILENAME
#define MATROSKA_ID_FILENAME
Definition: matroska.h:237
MATROSKA_ID_BLOCKADDITIONAL
#define MATROSKA_ID_BLOCKADDITIONAL
Definition: matroska.h:224
avpriv_mpeg4audio_sample_rates
const int avpriv_mpeg4audio_sample_rates[16]
Definition: mpeg4audio.c:57
ff_mkv_metadata_conv
const AVMetadataConv ff_mkv_metadata_conv[]
Definition: matroska.c:121
mkv_field_order
static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
Definition: matroskadec.c:1756
MATROSKA_ID_CODECID
#define MATROSKA_ID_CODECID
Definition: matroska.h:88
AV_CODEC_ID_PCM_F32LE
Definition: avcodec.h:438
MATROSKA_ID_VIDEOFIELDORDER
#define MATROSKA_ID_VIDEOFIELDORDER
Definition: matroska.h:122
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: avcodec.h:4090
MATROSKA_ID_VIDEOALPHAMODE
#define MATROSKA_ID_VIDEOALPHAMODE
Definition: matroska.h:124
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:473
AV_FIELD_BT
Definition: avcodec.h:1660
AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:810
MatroskaBlock::reference
int64_t reference
Definition: matroskadec.c:360
ff_rm_reorder_sipr_data
void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
Perform 4-bit block reordering for SIPR data.
Definition: rmsipr.c:41
AV_RB64
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
avformat.h
Main libavformat public API header.
MatroskaTrackAudio::buf_timecode
uint64_t buf_timecode
Definition: matroskadec.c:192
MATROSKA_ID_ENCODINGENCAESSETTINGS
#define MATROSKA_ID_ENCODINGENCAESSETTINGS
Definition: matroska.h:172
MatroskaTrack::num
uint64_t num
Definition: matroskadec.c:206
AVPacket::convergence_duration
attribute_deprecated int64_t convergence_duration
Definition: avcodec.h:1630
MATROSKA_ID_CUETRACK
#define MATROSKA_ID_CUETRACK
Definition: matroska.h:188
EbmlType
EbmlType
Definition: matroskadec.c:70
MATROSKA_ID_SEEKPOSITION
#define MATROSKA_ID_SEEKPOSITION
Definition: matroska.h:214
matroska_resync
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
Definition: matroskadec.c:739
MATROSKA_ID_CODECDELAY
#define MATROSKA_ID_CODECDELAY
Definition: matroska.h:94
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
MATROSKA_ID_CHAPTERTIMESTART
#define MATROSKA_ID_CHAPTERTIMESTART
Definition: matroska.h:245
MatroskaTrack::time_scale
double time_scale
Definition: matroskadec.c:213
avcodec_chroma_pos_to_enum
enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos)
Converts swscale x/y chroma position to AVChromaLocation.
Definition: utils.c:459
MATROSKA_ID_VIDEOCOLORRANGE
#define MATROSKA_ID_VIDEOCOLORRANGE
Definition: matroska.h:137
if
if(ret< 0)
Definition: vf_mcdeint.c:282
ffio_init_context
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
MatroskaTag::string
char * string
Definition: matroskadec.c:264
matroska_seekhead
static const EbmlSyntax matroska_seekhead[]
Definition: matroskadec.c:640
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
av_dict_set_int
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
AVFormatContext::error_recognition
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1581
AVStream::disposition
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:947
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
Ebml::doctype
char * doctype
Definition: matroskadec.c:113
AV_CODEC_ID_PCM_S16LE
Definition: avcodec.h:417
av_init_packet
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
AVRational::den
int den
Denominator.
Definition: rational.h:60
MATROSKA_ID_ENCODINGSIGNATURE
#define MATROSKA_ID_ENCODINGSIGNATURE
Definition: matroska.h:178
MATROSKA_ID_SEGMENT
#define MATROSKA_ID_SEGMENT
Definition: matroska.h:53
EbmlSyntax::id
uint32_t id
Definition: matroskadec.c:86
bps
unsigned bps
Definition: movenc.c:1383
MatroskaTags::target
MatroskaTagTarget target
Definition: matroskadec.c:279
ff_metadata_conv
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
AV_PKT_DATA_WEBVTT_SETTINGS
The optional settings (rendering instructions) that immediately follow the timestamp specifier of a W...
Definition: avcodec.h:1519
MKBETAG
#define MKBETAG(a, b, c, d)
Definition: common.h:343
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:734
MATROSKA_ID_SEEKHEAD
#define MATROSKA_ID_SEEKHEAD
Definition: matroska.h:60
AV_CODEC_ID_ASS
Definition: avcodec.h:627
matroska_parse_webvtt
static int matroska_parse_webvtt(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int data_len, uint64_t timecode, uint64_t duration, int64_t pos)
Definition: matroskadec.c:2884
EBML_ID_HEADER
#define EBML_ID_HEADER
Definition: matroska.h:33
AVStream::skip_to_keyframe
int skip_to_keyframe
Indicates that everything up to the next keyframe should be discarded.
Definition: avformat.h:1127
MATROSKA_ID_ENCODINGCOMPRESSION
#define MATROSKA_ID_ENCODINGCOMPRESSION
Definition: matroska.h:167
MATROSKA_ID_CLUSTERPREVSIZE
#define MATROSKA_ID_CLUSTERPREVSIZE
Definition: matroska.h:219
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVDictionaryEntry::value
char * value
Definition: dict.h:87
AVIOContext::eof_reached
int eof_reached
true if eof reached
Definition: avio.h:222
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
MATROSKA_ID_POINTENTRY
#define MATROSKA_ID_POINTENTRY
Definition: matroska.h:181
len
int len
Definition: vorbis_enc_data.h:452
MATROSKA_ID_FILEUID
#define MATROSKA_ID_FILEUID
Definition: matroska.h:240
tmp
static uint8_t tmp[8]
Definition: des.c:38
MATROSKA_ID_VIDEOPIXELCROPL
#define MATROSKA_ID_VIDEOPIXELCROPL
Definition: matroska.h:118
matroska_index_pos
static const EbmlSyntax matroska_index_pos[]
Definition: matroskadec.c:584
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1366
MatroskaBlock::non_simple
uint64_t non_simple
Definition: matroskadec.c:361
MATROSKA_ID_CHAPTERUID
#define MATROSKA_ID_CHAPTERUID
Definition: matroska.h:255
matroska_attachment
static const EbmlSyntax matroska_attachment[]
Definition: matroskadec.c:537
ebml_read_binary
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
Definition: matroskadec.c:940
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:4022
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3994
MATROSKA_ID_VIDEOCOLORMAXFALL
#define MATROSKA_ID_VIDEOCOLORMAXFALL
Definition: matroska.h:142
MATROSKA_ID_VIDEODISPLAYUNIT
#define MATROSKA_ID_VIDEODISPLAYUNIT
Definition: matroska.h:120
AVCodecParameters::channels
int channels
Audio only.
Definition: avcodec.h:4086
ebml_read_uint
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
Definition: matroskadec.c:856
MATROSKA_ID_TRACKMAXBLKADDID
#define MATROSKA_ID_TRACKMAXBLKADDID
Definition: matroska.h:108
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1600
EBML_ID_EBMLMAXSIZELENGTH
#define EBML_ID_EBMLMAXSIZELENGTH
Definition: matroska.h:39
AVFormatContext::duration
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1433
MatroskaTrackEncoding::encryption
MatroskaTrackEncryption encryption
Definition: matroskadec.c:131
MATROSKA_ID_CHAPSTRING
#define MATROSKA_ID_CHAPSTRING
Definition: matroska.h:248
MATROSKA_ID_VIDEOCOLORCBSUBHORZ
#define MATROSKA_ID_VIDEOCOLORCBSUBHORZ
Definition: matroska.h:133
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
start
void INT64 start
Definition: avisynth_c.h:690
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:664
MATROSKA_ID_TAGSTRING
#define MATROSKA_ID_TAGSTRING
Definition: matroska.h:198
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:195
options
static const AVOption options[]
Definition: matroskadec.c:3805
AV_CODEC_ID_PCM_S32LE
Definition: avcodec.h:425
AV_FIELD_UNKNOWN
Definition: avcodec.h:1655
ff_mkv_image_mime_tags
const CodecMime ff_mkv_image_mime_tags[]
Definition: matroska.c:102
AVStream::codecpar
AVCodecParameters * codecpar
Definition: avformat.h:1241
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
avio_feof
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3984
buffer_size_after_time_downloaded
static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps, double min_buffer, double *buffer, double *sec_to_download, AVFormatContext *s, int64_t cues_start)
Definition: matroskadec.c:3533
MatroskaTrackVideoColor::transfer_characteristics
uint64_t transfer_characteristics
Definition: matroskadec.c:157
ebml_read_float
static int ebml_read_float(AVIOContext *pb, int size, double *num)
Definition: matroskadec.c:899
MATROSKA_ID_DURATION
#define MATROSKA_ID_DURATION
Definition: matroska.h:67
MatroskaLevel::length
uint64_t length
Definition: matroskadec.c:290
matroska_aac_profile
static int matroska_aac_profile(char *codec_id)
Definition: matroskadec.c:1674
av_packet_new_side_data
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:317
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1603
matroska_track_encoding_encryption
static const EbmlSyntax matroska_track_encoding_encryption[]
Definition: matroskadec.c:462
EBML_ID_DOCTYPEVERSION
#define EBML_ID_DOCTYPEVERSION
Definition: matroska.h:41
matroska_clear_queue
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2604
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
CUES_START
#define CUES_START
Definition: matroska.h:357
AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:198
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:342
AV_CODEC_ID_SIPR
Definition: avcodec.h:560
AVStream::discard
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:949
AVStream::r_frame_rate
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1103
MATROSKA_ID_ATTACHEDFILE
#define MATROSKA_ID_ATTACHEDFILE
Definition: matroska.h:235
MATROSKA_ID_VIDEOCOLOR_GY
#define MATROSKA_ID_VIDEOCOLOR_GY
Definition: matroska.h:148
MatroskaCluster::blocks
EbmlList blocks
Definition: matroskadec.c:295
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1578
MATROSKA_ID_CODECSTATE
#define MATROSKA_ID_CODECSTATE
Definition: matroska.h:231
MatroskaTrack::default_duration
uint64_t default_duration
Definition: matroskadec.c:214
matroska_tag
static const EbmlSyntax matroska_tag[]
Definition: matroskadec.c:623
ff_webm_dash_manifest_demuxer
AVInputFormat ff_webm_dash_manifest_demuxer
Definition: matroskadec.c:3830
MATROSKA_ID_VIDEOCOLOR_RY
#define MATROSKA_ID_VIDEOCOLOR_RY
Definition: matroska.h:146
MATROSKA_ID_CODECINFOURL
#define MATROSKA_ID_CODECINFOURL
Definition: matroska.h:91
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1594
MATROSKA_ID_VIDEOPIXELWIDTH
#define MATROSKA_ID_VIDEOPIXELWIDTH
Definition: matroska.h:114
matroska_add_index_entries
static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1622
AVStream::attached_pic
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:976
MATROSKA_ID_TRACKAUDIO
#define MATROSKA_ID_TRACKAUDIO
Definition: matroska.h:82
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:242
buffer
GLuint buffer
Definition: opengl_enc.c:102
av_unused
#define av_unused
Definition: attributes.h:126
MATROSKA_ID_ENCODINGSCOPE
#define MATROSKA_ID_ENCODINGSCOPE
Definition: matroska.h:165
ff_mkv_codec_tags
const CodecTags ff_mkv_codec_tags[]
Definition: matroska.c:29
MATROSKA_ID_ENCODINGENCKEYID
#define MATROSKA_ID_ENCODINGENCKEYID
Definition: matroska.h:174
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
AV_CODEC_ID_PCM_S32BE
Definition: avcodec.h:426
MATROSKA_ID_DISCARDPADDING
#define MATROSKA_ID_DISCARDPADDING
Definition: matroska.h:232
a
a
Definition: h264pred_template.c:468
name
const char * name
Definition: opengl_enc.c:103
is_ebml_id_valid
static int is_ebml_id_valid(uint32_t id)
Definition: matroskadec.c:1078
MatroskaTrack::palette
uint32_t palette[AVPALETTE_COUNT]
Definition: matroskadec.c:230
webm_dash_manifest_compute_bandwidth
static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
Definition: matroskadec.c:3614
matroska_doctypes
static const char *const matroska_doctypes[]
Definition: matroskadec.c:735
MatroskaTagTarget::attachuid
uint64_t attachuid
Definition: matroskadec.c:275
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