FFmpeg  4.4.6
isom.h
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1 /*
2  * ISO Media common code
3  * copyright (c) 2001 Fabrice Bellard
4  * copyright (c) 2002 Francois Revol <revol@free.fr>
5  * copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #ifndef AVFORMAT_ISOM_H
25 #define AVFORMAT_ISOM_H
26 
27 #include <stddef.h>
28 #include <stdint.h>
29 
32 #include "libavutil/spherical.h"
33 #include "libavutil/stereo3d.h"
34 
35 #include "avio.h"
36 #include "internal.h"
37 #include "dv.h"
38 
39 /* isom.c */
40 extern const AVCodecTag ff_mp4_obj_type[];
41 extern const AVCodecTag ff_codec_movvideo_tags[];
42 extern const AVCodecTag ff_codec_movaudio_tags[];
44 extern const AVCodecTag ff_codec_movdata_tags[];
45 
46 int ff_mov_iso639_to_lang(const char lang[4], int mp4);
47 int ff_mov_lang_to_iso639(unsigned code, char to[4]);
48 
49 struct AVAESCTR;
50 
51 /* the QuickTime file format is quite convoluted...
52  * it has lots of index tables, each indexing something in another one...
53  * Here we just use what is needed to read the chunks
54  */
55 
56 typedef struct MOVStts {
57  unsigned int count;
58  int duration;
59 } MOVStts;
60 
61 typedef struct MOVStsc {
62  int first;
63  int count;
64  int id;
65 } MOVStsc;
66 
67 typedef struct MOVElst {
70  float rate;
71 } MOVElst;
72 
73 typedef struct MOVDref {
74  uint32_t type;
75  char *path;
76  char *dir;
77  char volume[28];
78  char filename[64];
79  int16_t nlvl_to, nlvl_from;
80 } MOVDref;
81 
82 typedef struct MOVAtom {
83  uint32_t type;
84  int64_t size; /* total size (excluding the size and type fields) */
85 } MOVAtom;
86 
87 struct MOVParseTableEntry;
88 
89 typedef struct MOVFragment {
91  unsigned track_id;
92  uint64_t base_data_offset;
93  uint64_t moof_offset;
94  uint64_t implicit_offset;
95  unsigned stsd_id;
96  unsigned duration;
97  unsigned size;
98  unsigned flags;
99 } MOVFragment;
100 
101 typedef struct MOVTrackExt {
102  unsigned track_id;
103  unsigned stsd_id;
104  unsigned duration;
105  unsigned size;
106  unsigned flags;
107 } MOVTrackExt;
108 
109 typedef struct MOVSbgp {
110  unsigned int count;
111  unsigned int index;
112 } MOVSbgp;
113 
114 typedef struct MOVEncryptionIndex {
115  // Individual encrypted samples. If there are no elements, then the default
116  // settings will be used.
117  unsigned int nb_encrypted_samples;
119 
123  uint64_t* auxiliary_offsets; ///< Absolute seek position
126 
127 typedef struct MOVFragmentStreamInfo {
128  int id;
136 
137 typedef struct MOVFragmentIndexItem {
140  int current;
144 
145 typedef struct MOVFragmentIndex {
147  int complete;
148  int current;
149  int nb_items;
152 
153 typedef struct MOVIndexRange {
156 } MOVIndexRange;
157 
158 typedef struct MOVStreamContext {
161  int ffindex; ///< AVStream index
163  unsigned int chunk_count;
165  unsigned int stts_count;
167  unsigned int sdtp_count;
169  unsigned int ctts_count;
170  unsigned int ctts_allocated_size;
172  unsigned int stsc_count;
174  unsigned int stsc_index;
176  unsigned int stps_count;
177  unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop
179  unsigned int elst_count;
182  unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
183  unsigned int stsz_sample_size; ///< always contains sample size from stsz atom
184  unsigned int sample_count;
187  unsigned int keyframe_count;
188  int *keyframes;
190  int64_t time_offset; ///< time offset of the edit list entries
191  int64_t min_corrected_pts; ///< minimum Composition time shown by the edits excluding empty edits.
196  unsigned int bytes_per_frame;
197  unsigned int samples_per_frame;
199  int pseudo_stream_id; ///< -1 means demux all ids
200  int16_t audio_cid; ///< stsd audio compression id
201  unsigned drefs_count;
203  int dref_id;
205  int width; ///< tkhd width
206  int height; ///< tkhd height
207  int dts_shift; ///< dts shift when ctts is negative
208  uint32_t palette[256];
211  uint32_t tmcd_flags; ///< tmcd track flags
212  int64_t track_end; ///< used for dts generation in fragmented movie files
213  int start_pad; ///< amount of samples to skip due to enc-dec delay
214  unsigned int rap_group_count;
216 
219 
220  /** extradata array (and size) for multiple stsd */
226 
233  size_t coll_size;
234 
235  uint32_t format;
236 
237  int has_sidx; // If there is an sidx entry for this stream.
238  struct {
239  struct AVAESCTR* aes_ctr;
240  unsigned int per_sample_iv_size; // Either 0, 8, or 16.
243  } cenc;
245 
246 typedef struct MOVContext {
247  const AVClass *class; ///< class for private options
250  int64_t duration; ///< duration of the longest track
251  int found_moov; ///< 'moov' atom has been found
252  int found_mdat; ///< 'mdat' atom has been found
253  int found_hdlr_mdta; ///< 'hdlr' atom with type 'mdta' has been found
254  int trak_index; ///< Index of the current 'trak'
255  char **meta_keys;
256  unsigned meta_keys_count;
259  int isom; ///< 1 if file is ISO Media (mp4/3gp)
260  MOVFragment fragment; ///< current fragment in moof atom
262  unsigned trex_count;
263  int itunes_metadata; ///< metadata are itunes style
266  unsigned int nb_chapter_tracks;
272  int64_t next_root_atom; ///< offset of the next root atom
275  int *bitrates; ///< bitrates read before streams creation
282  unsigned int aax_mode; ///< 'aax' file has been detected
289  void *audible_key;
291  void *audible_iv;
297  int32_t movie_display_matrix[3][3]; ///< display matrix from mvhd
299  uint32_t mfra_size;
300 } MOVContext;
301 
305 void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
306 
307 #define MP4ODescrTag 0x01
308 #define MP4IODescrTag 0x02
309 #define MP4ESDescrTag 0x03
310 #define MP4DecConfigDescrTag 0x04
311 #define MP4DecSpecificDescrTag 0x05
312 #define MP4SLDescrTag 0x06
313 
314 #define MOV_TFHD_BASE_DATA_OFFSET 0x01
315 #define MOV_TFHD_STSD_ID 0x02
316 #define MOV_TFHD_DEFAULT_DURATION 0x08
317 #define MOV_TFHD_DEFAULT_SIZE 0x10
318 #define MOV_TFHD_DEFAULT_FLAGS 0x20
319 #define MOV_TFHD_DURATION_IS_EMPTY 0x010000
320 #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000
321 
322 #define MOV_TRUN_DATA_OFFSET 0x01
323 #define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04
324 #define MOV_TRUN_SAMPLE_DURATION 0x100
325 #define MOV_TRUN_SAMPLE_SIZE 0x200
326 #define MOV_TRUN_SAMPLE_FLAGS 0x400
327 #define MOV_TRUN_SAMPLE_CTS 0x800
328 
329 #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
330 #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000
331 #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000
332 #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000
333 #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000
334 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000
335 
336 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000
337 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000
338 
339 #define MOV_TKHD_FLAG_ENABLED 0x0001
340 #define MOV_TKHD_FLAG_IN_MOVIE 0x0002
341 #define MOV_TKHD_FLAG_IN_PREVIEW 0x0004
342 #define MOV_TKHD_FLAG_IN_POSTER 0x0008
343 
344 #define MOV_SAMPLE_DEPENDENCY_UNKNOWN 0x0
345 #define MOV_SAMPLE_DEPENDENCY_YES 0x1
346 #define MOV_SAMPLE_DEPENDENCY_NO 0x2
347 
348 
349 #define TAG_IS_AVCI(tag) \
350  ((tag) == MKTAG('a', 'i', '5', 'p') || \
351  (tag) == MKTAG('a', 'i', '5', 'q') || \
352  (tag) == MKTAG('a', 'i', '5', '2') || \
353  (tag) == MKTAG('a', 'i', '5', '3') || \
354  (tag) == MKTAG('a', 'i', '5', '5') || \
355  (tag) == MKTAG('a', 'i', '5', '6') || \
356  (tag) == MKTAG('a', 'i', '1', 'p') || \
357  (tag) == MKTAG('a', 'i', '1', 'q') || \
358  (tag) == MKTAG('a', 'i', '1', '2') || \
359  (tag) == MKTAG('a', 'i', '1', '3') || \
360  (tag) == MKTAG('a', 'i', '1', '5') || \
361  (tag) == MKTAG('a', 'i', '1', '6') || \
362  (tag) == MKTAG('a', 'i', 'v', 'x') || \
363  (tag) == MKTAG('A', 'V', 'i', 'n'))
364 
365 
367 
368 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
369 void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
370 
371 #define FF_MOV_FLAG_MFRA_AUTO -1
372 #define FF_MOV_FLAG_MFRA_DTS 1
373 #define FF_MOV_FLAG_MFRA_PTS 2
374 
375 /**
376  * Compute codec id for 'lpcm' tag.
377  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
378  */
379 static inline enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
380 {
381  /* lpcm flags:
382  * 0x1 = float
383  * 0x2 = big-endian
384  * 0x4 = signed
385  */
386  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
387 }
388 
389 #endif /* AVFORMAT_ISOM_H */
uint8_t
int32_t
Buffered I/O operations.
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define fc(width, name, range_min, range_max)
Definition: cbs_av1.c:562
long long int64_t
Definition: coverity.c:34
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:304
int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
Definition: mov_esds.c:23
int ff_mp4_read_descr_len(AVIOContext *pb)
Definition: isom.c:282
int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
Definition: mov.c:2514
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom_tags.c:278
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom_tags.c:29
const AVCodecTag ff_mp4_obj_type[]
Definition: isom.c:34
int ff_mov_iso639_to_lang(const char lang[4], int mp4)
Definition: isom.c:233
int ff_mov_lang_to_iso639(unsigned code, char to[4])
Definition: isom.c:260
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:329
void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout)
Definition: isom.c:422
const AVCodecTag ff_codec_movdata_tags[]
Definition: isom.c:82
static enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
Compute codec id for 'lpcm' tag.
Definition: isom.h:379
const AVCodecTag ff_codec_movsubtitle_tags[]
Definition: isom.c:75
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:295
const char * to
Definition: webvttdec.c:34
enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
Select a PCM codec based on the given parameters.
Definition: utils.c:3143
common internal API header
Stereoscopic video.
uint32_t tag
Definition: movenc.c:1611
unsigned bps
Definition: movenc.c:1612
const uint8_t * code
Definition: spdifenc.c:413
Spherical video.
Describe the class of an AVClass context structure.
Definition: log.h:67
Content light level needed by to transmit HDR over HDMI (CTA-861.3).
This describes encryption info for a packet.
Format I/O context.
Definition: avformat.h:1232
Bytestream IO Context.
Definition: avio.h:161
Mastering display metadata capable of representing the color volume of the display used to master the...
This structure describes how to handle spherical videos, outlining information about projection,...
Definition: spherical.h:82
Stereo 3D type: this structure describes how two videos are packed within a single video surface,...
Definition: stereo3d.h:176
Stream structure.
Definition: avformat.h:873
Definition: isom.h:82
uint32_t type
Definition: isom.h:83
int64_t size
Definition: isom.h:84
uint8_t file_iv[20]
Definition: isom.h:284
int handbrake_version
Definition: isom.h:264
void * audible_iv
Definition: isom.h:291
int * bitrates
bitrates read before streams creation
Definition: isom.h:275
int ignore_editlist
Definition: isom.h:268
int itunes_metadata
metadata are itunes style
Definition: isom.h:263
int has_looked_for_mfra
Definition: isom.h:279
int enable_drefs
Definition: isom.h:296
int32_t movie_display_matrix[3][3]
display matrix from mvhd
Definition: isom.h:297
int have_read_mfra_size
Definition: isom.h:298
unsigned meta_keys_count
Definition: isom.h:256
char ** meta_keys
Definition: isom.h:255
int audible_fixed_key_size
Definition: isom.h:288
AVFormatContext * fc
Definition: isom.h:248
unsigned int aax_mode
'aax' file has been detected
Definition: isom.h:282
int found_mdat
'mdat' atom has been found
Definition: isom.h:252
void * activation_bytes
Definition: isom.h:285
int bitrates_count
Definition: isom.h:276
int * chapter_tracks
Definition: isom.h:265
int64_t duration
duration of the longest track
Definition: isom.h:250
unsigned trex_count
Definition: isom.h:262
int activation_bytes_size
Definition: isom.h:286
int64_t next_root_atom
offset of the next root atom
Definition: isom.h:272
int isom
1 if file is ISO Media (mp4/3gp)
Definition: isom.h:259
int ignore_chapters
Definition: isom.h:270
DVDemuxContext * dv_demux
Definition: isom.h:257
int export_xmp
Definition: isom.h:274
unsigned int nb_chapter_tracks
Definition: isom.h:266
int seek_individually
Definition: isom.h:271
uint8_t * decryption_key
Definition: isom.h:294
MOVFragmentIndex frag_index
Definition: isom.h:280
void * audible_fixed_key
Definition: isom.h:287
MOVTrackExt * trex_data
Definition: isom.h:261
int found_hdlr_mdta
'hdlr' atom with type 'mdta' has been found
Definition: isom.h:253
int audible_key_size
Definition: isom.h:290
uint8_t file_key[20]
Definition: isom.h:283
void * audible_key
Definition: isom.h:289
struct AVAES * aes_decrypt
Definition: isom.h:293
int decryption_key_len
Definition: isom.h:295
MOVFragment fragment
current fragment in moof atom
Definition: isom.h:260
int use_absolute_path
Definition: isom.h:267
AVFormatContext * dv_fctx
Definition: isom.h:258
int moov_retry
Definition: isom.h:277
int time_scale
Definition: isom.h:249
uint32_t mfra_size
Definition: isom.h:299
int found_moov
'moov' atom has been found
Definition: isom.h:251
int audible_iv_size
Definition: isom.h:292
int atom_depth
Definition: isom.h:281
int advanced_editlist
Definition: isom.h:269
int export_all
Definition: isom.h:273
int trak_index
Index of the current 'trak'.
Definition: isom.h:254
int use_mfra_for
Definition: isom.h:278
Definition: isom.h:73
char volume[28]
Definition: isom.h:77
char * dir
Definition: isom.h:76
int16_t nlvl_to
Definition: isom.h:79
char * path
Definition: isom.h:75
uint32_t type
Definition: isom.h:74
int16_t nlvl_from
Definition: isom.h:79
char filename[64]
Definition: isom.h:78
Definition: isom.h:67
float rate
Definition: isom.h:70
int64_t duration
Definition: isom.h:68
int64_t time
Definition: isom.h:69
uint64_t * auxiliary_offsets
Absolute seek position.
Definition: isom.h:123
unsigned int nb_encrypted_samples
Definition: isom.h:117
size_t auxiliary_offsets_count
Definition: isom.h:124
size_t auxiliary_info_sample_count
Definition: isom.h:121
uint8_t auxiliary_info_default_size
Definition: isom.h:122
uint8_t * auxiliary_info_sizes
Definition: isom.h:120
AVEncryptionInfo ** encrypted_samples
Definition: isom.h:118
MOVFragmentStreamInfo * stream_info
Definition: isom.h:142
int64_t moof_offset
Definition: isom.h:138
int allocated_size
Definition: isom.h:146
MOVFragmentIndexItem * item
Definition: isom.h:150
int complete
Definition: isom.h:147
int nb_items
Definition: isom.h:149
MOVEncryptionIndex * encryption_index
Definition: isom.h:134
int64_t tfdt_dts
Definition: isom.h:131
int64_t next_trun_dts
Definition: isom.h:132
int64_t first_tfra_pts
Definition: isom.h:130
int64_t sidx_pts
Definition: isom.h:129
unsigned track_id
Definition: isom.h:91
unsigned flags
Definition: isom.h:98
unsigned duration
Definition: isom.h:96
int found_tfhd
Definition: isom.h:90
unsigned size
Definition: isom.h:97
unsigned stsd_id
Definition: isom.h:95
uint64_t base_data_offset
Definition: isom.h:92
uint64_t moof_offset
Definition: isom.h:93
uint64_t implicit_offset
Definition: isom.h:94
int64_t start
Definition: isom.h:154
int64_t end
Definition: isom.h:155
Definition: isom.h:109
unsigned int index
Definition: isom.h:111
unsigned int count
Definition: isom.h:110
int64_t time_offset
time offset of the edit list entries
Definition: isom.h:190
int64_t duration_for_fps
Definition: isom.h:218
AVIOContext * pb
Definition: isom.h:159
size_t spherical_size
Definition: isom.h:230
uint8_t ** extradata
extradata array (and size) for multiple stsd
Definition: isom.h:221
MOVSbgp * rap_group
Definition: isom.h:215
MOVEncryptionIndex * encryption_index
Definition: isom.h:242
int64_t track_end
used for dts generation in fragmented movie files
Definition: isom.h:212
int pseudo_stream_id
-1 means demux all ids
Definition: isom.h:199
unsigned int rap_group_count
Definition: isom.h:214
int height
tkhd height
Definition: isom.h:206
int stsc_sample
Definition: isom.h:175
MOVDref * drefs
Definition: isom.h:202
MOVStts * ctts_data
Definition: isom.h:171
unsigned int ctts_allocated_size
Definition: isom.h:170
unsigned int per_sample_iv_size
Definition: isom.h:240
int * extradata_size
Definition: isom.h:222
struct MOVStreamContext::@261 cenc
size_t coll_size
Definition: isom.h:233
int dv_audio_container
Definition: isom.h:198
AVContentLightMetadata * coll
Definition: isom.h:232
int64_t * chunk_offsets
Definition: isom.h:164
MOVStsc * stsc_data
Definition: isom.h:173
AVStereo3D * stereo3d
Definition: isom.h:228
int32_t * display_matrix
Definition: isom.h:227
int current_sample
Definition: isom.h:192
unsigned int samples_per_frame
Definition: isom.h:197
int start_pad
amount of samples to skip due to enc-dec delay
Definition: isom.h:213
int nb_frames_for_fps
Definition: isom.h:217
uint32_t format
Definition: isom.h:235
int keyframe_absent
Definition: isom.h:186
MOVElst * elst_data
Definition: isom.h:178
int64_t current_index
Definition: isom.h:193
unsigned int stts_count
Definition: isom.h:165
uint8_t * sdtp_data
Definition: isom.h:168
unsigned int sample_size
may contain value calculated from stsd or value from stsz atom
Definition: isom.h:182
AVEncryptionInfo * default_encrypted_sample
Definition: isom.h:241
int timecode_track
Definition: isom.h:204
int16_t audio_cid
stsd audio compression id
Definition: isom.h:200
int ctts_sample
Definition: isom.h:181
struct AVAESCTR * aes_ctr
Definition: isom.h:239
MOVStts * stts_data
Definition: isom.h:166
int last_stsd_index
Definition: isom.h:223
int stsd_count
Definition: isom.h:224
unsigned int chunk_count
Definition: isom.h:163
int64_t data_size
Definition: isom.h:210
int pb_is_copied
Definition: isom.h:160
int * keyframes
Definition: isom.h:188
int has_sidx
Definition: isom.h:237
unsigned drefs_count
Definition: isom.h:201
MOVIndexRange * current_index_range
Definition: isom.h:195
int next_chunk
Definition: isom.h:162
AVMasteringDisplayMetadata * mastering
Definition: isom.h:231
int width
tkhd width
Definition: isom.h:205
unsigned int sdtp_count
Definition: isom.h:167
unsigned int sample_count
Definition: isom.h:184
int dts_shift
dts shift when ctts is negative
Definition: isom.h:207
int stsd_version
Definition: isom.h:225
int time_scale
Definition: isom.h:189
unsigned int stsc_index
Definition: isom.h:174
int64_t min_corrected_pts
minimum Composition time shown by the edits excluding empty edits.
Definition: isom.h:191
int has_palette
Definition: isom.h:209
int ctts_index
Definition: isom.h:180
uint32_t palette[256]
Definition: isom.h:208
int ffindex
AVStream index.
Definition: isom.h:161
int * sample_sizes
Definition: isom.h:185
AVSphericalMapping * spherical
Definition: isom.h:229
unsigned int keyframe_count
Definition: isom.h:187
unsigned int bytes_per_frame
Definition: isom.h:196
uint32_t tmcd_flags
tmcd track flags
Definition: isom.h:211
unsigned * stps_data
partial sync sample for mpeg-2 open gop
Definition: isom.h:177
MOVIndexRange * index_ranges
Definition: isom.h:194
unsigned int stsc_count
Definition: isom.h:172
unsigned int stsz_sample_size
always contains sample size from stsz atom
Definition: isom.h:183
unsigned int elst_count
Definition: isom.h:179
unsigned int ctts_count
Definition: isom.h:169
unsigned int stps_count
Definition: isom.h:176
Definition: isom.h:61
int first
Definition: isom.h:62
int count
Definition: isom.h:63
int id
Definition: isom.h:64
Definition: isom.h:56
unsigned int count
Definition: isom.h:57
int duration
Definition: isom.h:58
unsigned flags
Definition: isom.h:106
unsigned duration
Definition: isom.h:104
unsigned size
Definition: isom.h:105
unsigned track_id
Definition: isom.h:102
unsigned stsd_id
Definition: isom.h:103
static double c[64]