FFmpeg
isom.h
Go to the documentation of this file.
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  unsigned int duration;
59 } MOVStts;
60 
61 typedef struct MOVCtts {
62  unsigned int count;
63  int duration;
64 } MOVCtts;
65 
66 typedef struct MOVStsc {
67  int first;
68  int count;
69  int id;
70 } MOVStsc;
71 
72 typedef struct MOVElst {
73  int64_t duration;
74  int64_t time;
75  float rate;
76 } MOVElst;
77 
78 typedef struct MOVDref {
79  uint32_t type;
80  char *path;
81  char *dir;
82  char volume[28];
83  char filename[64];
84  int16_t nlvl_to, nlvl_from;
85 } MOVDref;
86 
87 typedef struct MOVAtom {
88  uint32_t type;
89  int64_t size; /* total size (excluding the size and type fields) */
90 } MOVAtom;
91 
92 struct MOVParseTableEntry;
93 
94 typedef struct MOVFragment {
96  unsigned track_id;
97  uint64_t base_data_offset;
98  uint64_t moof_offset;
99  uint64_t implicit_offset;
100  unsigned stsd_id;
101  unsigned duration;
102  unsigned size;
103  unsigned flags;
104 } MOVFragment;
105 
106 typedef struct MOVTrackExt {
107  unsigned track_id;
108  unsigned stsd_id;
109  unsigned duration;
110  unsigned size;
111  unsigned flags;
112 } MOVTrackExt;
113 
114 typedef struct MOVSbgp {
115  unsigned int count;
116  unsigned int index;
117 } MOVSbgp;
118 
119 typedef struct MOVEncryptionIndex {
120  // Individual encrypted samples. If there are no elements, then the default
121  // settings will be used.
122  unsigned int nb_encrypted_samples;
124 
128  uint64_t* auxiliary_offsets; ///< Absolute seek position
131 
132 typedef struct MOVFragmentStreamInfo {
133  int id;
134  int64_t sidx_pts;
135  int64_t first_tfra_pts;
136  int64_t tfdt_dts;
137  int64_t next_trun_dts;
141 
142 typedef struct MOVFragmentIndexItem {
143  int64_t moof_offset;
145  int current;
149 
150 typedef struct MOVFragmentIndex {
152  int complete;
153  int current;
154  int nb_items;
157 
158 typedef struct MOVIndexRange {
159  int64_t start;
160  int64_t end;
161 } MOVIndexRange;
162 
163 typedef struct MOVStreamContext {
166  int ffindex; ///< AVStream index
168  unsigned int chunk_count;
169  int64_t *chunk_offsets;
170  unsigned int stts_count;
172  unsigned int sdtp_count;
173  uint8_t *sdtp_data;
174  unsigned int ctts_count;
175  unsigned int ctts_allocated_size;
177  unsigned int stsc_count;
179  unsigned int stsc_index;
181  unsigned int stps_count;
182  unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop
184  unsigned int elst_count;
187  unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
188  unsigned int stsz_sample_size; ///< always contains sample size from stsz atom
189  unsigned int sample_count;
192  unsigned int keyframe_count;
193  int *keyframes;
195  int64_t time_offset; ///< time offset of the edit list entries
196  int64_t min_corrected_pts; ///< minimum Composition time shown by the edits excluding empty edits.
198  int64_t current_index;
201  unsigned int bytes_per_frame;
202  unsigned int samples_per_frame;
204  int pseudo_stream_id; ///< -1 means demux all ids
205  int16_t audio_cid; ///< stsd audio compression id
206  unsigned drefs_count;
208  int dref_id;
210  int width; ///< tkhd width
211  int height; ///< tkhd height
212  int dts_shift; ///< dts shift when ctts is negative
213  uint32_t palette[256];
215  int64_t data_size;
216  uint32_t tmcd_flags; ///< tmcd track flags
217  uint8_t tmcd_nb_frames; ///< tmcd number of frames per tick / second
218  int64_t track_end; ///< used for dts generation in fragmented movie files
219  int start_pad; ///< amount of samples to skip due to enc-dec delay
220  unsigned int rap_group_count;
222  unsigned int sync_group_count;
224  uint8_t *sgpd_sync;
225  uint32_t sgpd_sync_count;
231 
234 
235  /** extradata array (and size) for multiple stsd */
236  uint8_t **extradata;
241 
248  size_t coll_size;
249 
250  uint32_t format;
251 
252  int has_sidx; // If there is an sidx entry for this stream.
253  struct {
254  struct AVAESCTR* aes_ctr;
255  struct AVAES *aes_ctx;
256  unsigned int frag_index_entry_base;
257  unsigned int per_sample_iv_size; // Either 0, 8, or 16.
260  } cenc;
262 
263 typedef struct MOVContext {
264  const AVClass *class; ///< class for private options
267  int64_t duration; ///< duration of the longest track
268  int found_moov; ///< 'moov' atom has been found
269  int found_mdat; ///< 'mdat' atom has been found
270  int found_hdlr_mdta; ///< 'hdlr' atom with type 'mdta' has been found
271  int trak_index; ///< Index of the current 'trak'
272  char **meta_keys;
273  unsigned meta_keys_count;
276  int isom; ///< 1 if file is ISO Media (mp4/3gp)
277  MOVFragment fragment; ///< current fragment in moof atom
279  unsigned trex_count;
280  int itunes_metadata; ///< metadata are itunes style
283  unsigned int nb_chapter_tracks;
289  int64_t next_root_atom; ///< offset of the next root atom
292  int *bitrates; ///< bitrates read before streams creation
297  int use_tfdt;
300  unsigned int aax_mode; ///< 'aax' file has been detected
301  uint8_t file_key[20];
302  uint8_t file_iv[20];
307  void *audible_key;
309  void *audible_iv;
312  uint8_t *decryption_key;
315  int32_t movie_display_matrix[3][3]; ///< display matrix from mvhd
317  uint32_t mfra_size;
318  uint32_t max_stts_delta;
321 } MOVContext;
322 
326 void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
327 
328 #define MP4ODescrTag 0x01
329 #define MP4IODescrTag 0x02
330 #define MP4ESDescrTag 0x03
331 #define MP4DecConfigDescrTag 0x04
332 #define MP4DecSpecificDescrTag 0x05
333 #define MP4SLDescrTag 0x06
334 
335 #define MOV_TFHD_BASE_DATA_OFFSET 0x01
336 #define MOV_TFHD_STSD_ID 0x02
337 #define MOV_TFHD_DEFAULT_DURATION 0x08
338 #define MOV_TFHD_DEFAULT_SIZE 0x10
339 #define MOV_TFHD_DEFAULT_FLAGS 0x20
340 #define MOV_TFHD_DURATION_IS_EMPTY 0x010000
341 #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000
342 
343 #define MOV_TRUN_DATA_OFFSET 0x01
344 #define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04
345 #define MOV_TRUN_SAMPLE_DURATION 0x100
346 #define MOV_TRUN_SAMPLE_SIZE 0x200
347 #define MOV_TRUN_SAMPLE_FLAGS 0x400
348 #define MOV_TRUN_SAMPLE_CTS 0x800
349 
350 #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
351 #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000
352 #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000
353 #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000
354 #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000
355 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000
356 
357 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000
358 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000
359 
360 #define MOV_TKHD_FLAG_ENABLED 0x0001
361 #define MOV_TKHD_FLAG_IN_MOVIE 0x0002
362 #define MOV_TKHD_FLAG_IN_PREVIEW 0x0004
363 #define MOV_TKHD_FLAG_IN_POSTER 0x0008
364 
365 #define MOV_SAMPLE_DEPENDENCY_UNKNOWN 0x0
366 #define MOV_SAMPLE_DEPENDENCY_YES 0x1
367 #define MOV_SAMPLE_DEPENDENCY_NO 0x2
368 
369 
370 #define TAG_IS_AVCI(tag) \
371  ((tag) == MKTAG('a', 'i', '5', 'p') || \
372  (tag) == MKTAG('a', 'i', '5', 'q') || \
373  (tag) == MKTAG('a', 'i', '5', '2') || \
374  (tag) == MKTAG('a', 'i', '5', '3') || \
375  (tag) == MKTAG('a', 'i', '5', '5') || \
376  (tag) == MKTAG('a', 'i', '5', '6') || \
377  (tag) == MKTAG('a', 'i', '1', 'p') || \
378  (tag) == MKTAG('a', 'i', '1', 'q') || \
379  (tag) == MKTAG('a', 'i', '1', '2') || \
380  (tag) == MKTAG('a', 'i', '1', '3') || \
381  (tag) == MKTAG('a', 'i', '1', '5') || \
382  (tag) == MKTAG('a', 'i', '1', '6') || \
383  (tag) == MKTAG('a', 'i', 'v', 'x') || \
384  (tag) == MKTAG('A', 'V', 'i', 'n'))
385 
386 
388 
389 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
390 void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
391 
392 #define FF_MOV_FLAG_MFRA_AUTO -1
393 #define FF_MOV_FLAG_MFRA_DTS 1
394 #define FF_MOV_FLAG_MFRA_PTS 2
395 
396 /**
397  * Compute codec id for 'lpcm' tag.
398  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
399  */
400 static inline enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
401 {
402  /* lpcm flags:
403  * 0x1 = float
404  * 0x2 = big-endian
405  * 0x4 = signed
406  */
407  return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
408 }
409 
410 #define MOV_ISMV_TTML_TAG MKTAG('d', 'f', 'x', 'p')
411 #define MOV_MP4_TTML_TAG MKTAG('s', 't', 'p', 'p')
412 
415  const char *value;
416 };
417 
419  const char *scheme_uri;
421 };
422 
423 extern const struct MP4TrackKindMapping ff_mov_track_kind_table[];
424 
425 #endif /* AVFORMAT_ISOM_H */
MOVStreamContext::ctts_allocated_size
unsigned int ctts_allocated_size
Definition: isom.h:175
MOVFragmentStreamInfo::first_tfra_pts
int64_t first_tfra_pts
Definition: isom.h:135
ff_get_pcm_codec_id
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:155
MOVStreamContext::audio_cid
int16_t audio_cid
stsd audio compression id
Definition: isom.h:205
MOVStreamContext::sync_group
MOVSbgp * sync_group
Definition: isom.h:223
MOVStreamContext::height
int height
tkhd height
Definition: isom.h:211
MOVContext::moov_retry
int moov_retry
Definition: isom.h:294
MOVContext::nb_chapter_tracks
unsigned int nb_chapter_tracks
Definition: isom.h:283
MOVStreamContext::last_stsd_index
int last_stsd_index
Definition: isom.h:238
MOVContext::use_absolute_path
int use_absolute_path
Definition: isom.h:284
MOVStreamContext::extradata
uint8_t ** extradata
extradata array (and size) for multiple stsd
Definition: isom.h:236
MOVStreamContext::open_key_samples
int * open_key_samples
Definition: isom.h:228
MOVContext::activation_bytes
void * activation_bytes
Definition: isom.h:303
MOVContext::is_still_picture_avif
int is_still_picture_avif
Definition: isom.h:319
MOVFragmentStreamInfo
Definition: isom.h:132
MOVStreamContext::sample_offsets
int32_t * sample_offsets
Definition: isom.h:226
MOVStreamContext::cenc
struct MOVStreamContext::@268 cenc
MOVFragment::base_data_offset
uint64_t base_data_offset
Definition: isom.h:97
MOVStreamContext
Definition: isom.h:163
MOVStreamContext::stsc_data
MOVStsc * stsc_data
Definition: isom.h:178
MOVStreamContext::spherical
AVSphericalMapping * spherical
Definition: isom.h:244
MOVEncryptionIndex
Definition: isom.h:119
MOVContext::primary_item_id
int primary_item_id
Definition: isom.h:320
MOVContext::found_moov
int found_moov
'moov' atom has been found
Definition: isom.h:268
MOVSbgp
Definition: isom.h:114
MOVCtts
Definition: isom.h:61
MOVStreamContext::rap_group_count
unsigned int rap_group_count
Definition: isom.h:220
MOVContext::found_mdat
int found_mdat
'mdat' atom has been found
Definition: isom.h:269
MOVStreamContext::drefs_count
unsigned drefs_count
Definition: isom.h:206
MOVContext::max_stts_delta
uint32_t max_stts_delta
Definition: isom.h:318
MOVContext::trex_data
MOVTrackExt * trex_data
Definition: isom.h:278
MOVContext::bitrates
int * bitrates
bitrates read before streams creation
Definition: isom.h:292
MOVContext::export_all
int export_all
Definition: isom.h:290
MOVElst::rate
float rate
Definition: isom.h:75
spherical.h
MOVFragmentIndexItem::moof_offset
int64_t moof_offset
Definition: isom.h:143
MOVStreamContext::spherical_size
size_t spherical_size
Definition: isom.h:245
fc
#define fc(width, name, range_min, range_max)
Definition: cbs_av1.c:551
MP4TrackKindMapping::scheme_uri
const char * scheme_uri
Definition: isom.h:419
MOVDref::dir
char * dir
Definition: isom.h:81
MOVContext::activation_bytes_size
int activation_bytes_size
Definition: isom.h:304
ff_mp4_parse_es_descr
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:304
MOVAtom
Definition: isom.h:87
MOVStreamContext::sample_count
unsigned int sample_count
Definition: isom.h:189
MOVFragmentIndex::allocated_size
int allocated_size
Definition: isom.h:151
MOVTrackExt::flags
unsigned flags
Definition: isom.h:111
MOVStreamContext::ctts_data
MOVCtts * ctts_data
Definition: isom.h:176
MOVStreamContext::aes_ctr
struct AVAESCTR * aes_ctr
Definition: isom.h:254
MOVStreamContext::dv_audio_container
int dv_audio_container
Definition: isom.h:203
MOVStreamContext::stsd_count
int stsd_count
Definition: isom.h:239
AVContentLightMetadata
Content light level needed by to transmit HDR over HDMI (CTA-861.3).
Definition: mastering_display_metadata.h:98
MOVStreamContext::stsc_count
unsigned int stsc_count
Definition: isom.h:177
MOVStreamContext::has_palette
int has_palette
Definition: isom.h:214
MOVIndexRange::start
int64_t start
Definition: isom.h:159
MOVStreamContext::nb_frames_for_fps
int nb_frames_for_fps
Definition: isom.h:232
MOVStreamContext::mastering
AVMasteringDisplayMetadata * mastering
Definition: isom.h:246
MOVFragmentIndexItem::current
int current
Definition: isom.h:145
MOVTrackExt
Definition: isom.h:106
MOVFragment::found_tfhd
int found_tfhd
Definition: isom.h:95
MOVContext::decryption_key
uint8_t * decryption_key
Definition: isom.h:312
MOVStreamContext::ctts_index
int ctts_index
Definition: isom.h:185
MOVParseTableEntry
Definition: mov.c:76
dv.h
MOVCtts::duration
int duration
Definition: isom.h:63
MOVContext
Definition: isom.h:263
MOVContext::isom
int isom
1 if file is ISO Media (mp4/3gp)
Definition: isom.h:276
MOVStreamContext::width
int width
tkhd width
Definition: isom.h:210
MOVContext::meta_keys
char ** meta_keys
Definition: isom.h:272
MOVStreamContext::extradata_size
int * extradata_size
Definition: isom.h:237
MOVContext::audible_iv_size
int audible_iv_size
Definition: isom.h:310
MOVStreamContext::keyframes
int * keyframes
Definition: isom.h:193
MOVEncryptionIndex::auxiliary_info_sample_count
size_t auxiliary_info_sample_count
Definition: isom.h:126
MOVStsc::id
int id
Definition: isom.h:69
MOVStreamContext::elst_data
MOVElst * elst_data
Definition: isom.h:183
MOVFragmentIndex::complete
int complete
Definition: isom.h:152
MOVStreamContext::stsc_sample
int stsc_sample
Definition: isom.h:180
AVCodecTag
Definition: internal.h:50
MOVTrackExt::track_id
unsigned track_id
Definition: isom.h:107
MOVEncryptionIndex::auxiliary_offsets
uint64_t * auxiliary_offsets
Absolute seek position.
Definition: isom.h:128
MOVStreamContext::dts_shift
int dts_shift
dts shift when ctts is negative
Definition: isom.h:212
MOVStreamContext::stsd_version
int stsd_version
Definition: isom.h:240
ff_mov_read_esds
int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
Definition: mov_esds.c:23
stereo3d.h
MOVFragmentStreamInfo::encryption_index
MOVEncryptionIndex * encryption_index
Definition: isom.h:139
MOVContext::fc
AVFormatContext * fc
Definition: isom.h:265
ff_mov_lang_to_iso639
int ff_mov_lang_to_iso639(unsigned code, char to[4])
Definition: isom.c:260
MOVContext::audible_key_size
int audible_key_size
Definition: isom.h:308
MOVStreamContext::sample_offsets_count
int sample_offsets_count
Definition: isom.h:227
MOVCtts::count
unsigned int count
Definition: isom.h:62
MOVStreamContext::drefs
MOVDref * drefs
Definition: isom.h:207
MOVContext::aes_decrypt
struct AVAES * aes_decrypt
Definition: isom.h:311
MOVFragmentIndex::nb_items
int nb_items
Definition: isom.h:154
MOVStreamContext::keyframe_absent
int keyframe_absent
Definition: isom.h:191
MOVStts::duration
unsigned int duration
Definition: isom.h:58
MOVStreamContext::coll_size
size_t coll_size
Definition: isom.h:248
to
const char * to
Definition: webvttdec.c:35
MOVStreamContext::min_corrected_pts
int64_t min_corrected_pts
minimum Composition time shown by the edits excluding empty edits.
Definition: isom.h:196
MOVStreamContext::sdtp_count
unsigned int sdtp_count
Definition: isom.h:172
ff_mov_iso639_to_lang
int ff_mov_iso639_to_lang(const char lang[4], int mp4)
Definition: isom.c:233
MOVStreamContext::sdtp_data
uint8_t * sdtp_data
Definition: isom.h:173
MOVTrackExt::duration
unsigned duration
Definition: isom.h:109
MOVContext::audible_iv
void * audible_iv
Definition: isom.h:309
MOVStreamContext::current_sample
int current_sample
Definition: isom.h:197
MOVFragmentStreamInfo::sidx_pts
int64_t sidx_pts
Definition: isom.h:134
MOVFragmentIndex::current
int current
Definition: isom.h:153
MOVEncryptionIndex::encrypted_samples
AVEncryptionInfo ** encrypted_samples
Definition: isom.h:123
MOVAtom::size
int64_t size
Definition: isom.h:89
ff_mov_get_lpcm_codec_id
static enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
Compute codec id for 'lpcm' tag.
Definition: isom.h:400
MOVStreamContext::keyframe_count
unsigned int keyframe_count
Definition: isom.h:192
MOVStsc
Definition: isom.h:66
AVFormatContext
Format I/O context.
Definition: avformat.h:1213
MOVStreamContext::index_ranges
MOVIndexRange * index_ranges
Definition: isom.h:199
internal.h
MOVTrackExt::stsd_id
unsigned stsd_id
Definition: isom.h:108
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
MOVContext::ignore_editlist
int ignore_editlist
Definition: isom.h:285
MOVDref
Definition: isom.h:78
MOVStreamContext::ctts_count
unsigned int ctts_count
Definition: isom.h:174
MP4TrackKindValueMapping::disposition
int disposition
Definition: isom.h:414
MOVContext::use_tfdt
int use_tfdt
Definition: isom.h:297
ff_mp4_read_descr
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:295
MOVElst
Definition: isom.h:72
MOVContext::movie_display_matrix
int32_t movie_display_matrix[3][3]
display matrix from mvhd
Definition: isom.h:315
MOVDref::nlvl_to
int16_t nlvl_to
Definition: isom.h:84
MOVContext::atom_depth
int atom_depth
Definition: isom.h:299
MOVContext::duration
int64_t duration
duration of the longest track
Definition: isom.h:267
MOVStreamContext::time_offset
int64_t time_offset
time offset of the edit list entries
Definition: isom.h:195
MOVStreamContext::current_index_range
MOVIndexRange * current_index_range
Definition: isom.h:200
MOVStreamContext::timecode_track
int timecode_track
Definition: isom.h:209
ff_codec_movvideo_tags
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom_tags.c:29
ff_mp4_read_descr_len
int ff_mp4_read_descr_len(AVIOContext *pb)
Definition: isom.c:282
MOVStreamContext::rap_group
MOVSbgp * rap_group
Definition: isom.h:221
MOVStreamContext::open_key_samples_count
int open_key_samples_count
Definition: isom.h:229
ff_codec_movaudio_tags
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom_tags.c:280
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
MOVSbgp::count
unsigned int count
Definition: isom.h:115
MOVStts
Definition: isom.h:56
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:47
MOVContext::dv_demux
DVDemuxContext * dv_demux
Definition: isom.h:274
MOVEncryptionIndex::auxiliary_info_default_size
uint8_t auxiliary_info_default_size
Definition: isom.h:127
MOVContext::has_looked_for_mfra
int has_looked_for_mfra
Definition: isom.h:296
MOVFragment::flags
unsigned flags
Definition: isom.h:103
AVIOContext
Bytestream IO Context.
Definition: avio.h:162
MOVStreamContext::aes_ctx
struct AVAES * aes_ctx
Definition: isom.h:255
MOVContext::handbrake_version
int handbrake_version
Definition: isom.h:281
MOVStreamContext::ctts_sample
int ctts_sample
Definition: isom.h:186
MOVFragmentIndexItem
Definition: isom.h:142
MOVStsc::first
int first
Definition: isom.h:67
MOVStreamContext::stsz_sample_size
unsigned int stsz_sample_size
always contains sample size from stsz atom
Definition: isom.h:188
MOVStreamContext::sgpd_sync
uint8_t * sgpd_sync
Definition: isom.h:224
bps
unsigned bps
Definition: movenc.c:1647
MOVContext::audible_fixed_key
void * audible_fixed_key
Definition: isom.h:305
MOVContext::trex_count
unsigned trex_count
Definition: isom.h:279
avio.h
MOVStreamContext::coll
AVContentLightMetadata * coll
Definition: isom.h:247
MOVDref::path
char * path
Definition: isom.h:80
MOVContext::file_key
uint8_t file_key[20]
Definition: isom.h:301
DVDemuxContext
Definition: dv.c:54
MOVEncryptionIndex::auxiliary_offsets_count
size_t auxiliary_offsets_count
Definition: isom.h:129
MOVFragmentIndexItem::stream_info
MOVFragmentStreamInfo * stream_info
Definition: isom.h:147
MOVStreamContext::chunk_offsets
int64_t * chunk_offsets
Definition: isom.h:169
ff_mp4_obj_type
const AVCodecTag ff_mp4_obj_type[]
Definition: isom.c:34
MOVFragmentIndex::item
MOVFragmentIndexItem * item
Definition: isom.h:155
MOVContext::decryption_key_len
int decryption_key_len
Definition: isom.h:313
MOVContext::audible_fixed_key_size
int audible_fixed_key_size
Definition: isom.h:306
MOVDref::nlvl_from
int16_t nlvl_from
Definition: isom.h:84
MOVFragmentStreamInfo::next_trun_dts
int64_t next_trun_dts
Definition: isom.h:137
MOVStreamContext::stsc_index
unsigned int stsc_index
Definition: isom.h:179
MOVIndexRange
Definition: isom.h:158
MOVContext::advanced_editlist
int advanced_editlist
Definition: isom.h:286
MOVStreamContext::time_scale
int time_scale
Definition: isom.h:194
MOVStreamContext::bytes_per_frame
unsigned int bytes_per_frame
Definition: isom.h:201
MOVIndexRange::end
int64_t end
Definition: isom.h:160
code
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some it can consider them to be part of the FIFO and delay acknowledging a status change accordingly Example code
Definition: filter_design.txt:178
MOVStreamContext::stereo3d
AVStereo3D * stereo3d
Definition: isom.h:243
MOVDref::volume
char volume[28]
Definition: isom.h:82
MOVStreamContext::stps_count
unsigned int stps_count
Definition: isom.h:181
MOVFragment::duration
unsigned duration
Definition: isom.h:101
MOVContext::frag_index
MOVFragmentIndex frag_index
Definition: isom.h:298
ff_codec_movsubtitle_tags
const AVCodecTag ff_codec_movsubtitle_tags[]
Definition: isom.c:75
MOVStreamContext::dref_id
int dref_id
Definition: isom.h:208
MOVContext::mfra_size
uint32_t mfra_size
Definition: isom.h:317
ff_mov_write_chan
void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout)
Definition: isom.c:413
MOVStreamContext::pb
AVIOContext * pb
Definition: isom.h:164
AVMasteringDisplayMetadata
Mastering display metadata capable of representing the color volume of the display used to master the...
Definition: mastering_display_metadata.h:38
MOVFragment::size
unsigned size
Definition: isom.h:102
MOVContext::export_xmp
int export_xmp
Definition: isom.h:291
MOVFragmentStreamInfo::tfdt_dts
int64_t tfdt_dts
Definition: isom.h:136
MOVStreamContext::sample_sizes
int * sample_sizes
Definition: isom.h:190
MP4TrackKindValueMapping
Definition: isom.h:413
ff_codec_movdata_tags
const AVCodecTag ff_codec_movdata_tags[]
Definition: isom.c:82
MOVStreamContext::chunk_count
unsigned int chunk_count
Definition: isom.h:168
MOVStreamContext::data_size
int64_t data_size
Definition: isom.h:215
tag
uint32_t tag
Definition: movenc.c:1646
AVStream
Stream structure.
Definition: avformat.h:948
MOVEncryptionIndex::nb_encrypted_samples
unsigned int nb_encrypted_samples
Definition: isom.h:122
MOVStreamContext::stts_data
MOVStts * stts_data
Definition: isom.h:171
AVAES
Definition: aes_internal.h:34
MOVSbgp::index
unsigned int index
Definition: isom.h:116
MOVContext::chapter_tracks
int * chapter_tracks
Definition: isom.h:282
MOVFragment::implicit_offset
uint64_t implicit_offset
Definition: isom.h:99
MOVStreamContext::pseudo_stream_id
int pseudo_stream_id
-1 means demux all ids
Definition: isom.h:204
MOVContext::time_scale
int time_scale
Definition: isom.h:266
MP4TrackKindMapping::value_maps
const struct MP4TrackKindValueMapping * value_maps
Definition: isom.h:420
MOVFragment
Definition: isom.h:94
MOVContext::use_mfra_for
int use_mfra_for
Definition: isom.h:295
MOVContext::enable_drefs
int enable_drefs
Definition: isom.h:314
AVEncryptionInfo
This describes encryption info for a packet.
Definition: encryption_info.h:43
MOVStreamContext::encryption_index
MOVEncryptionIndex * encryption_index
Definition: isom.h:259
MOVStreamContext::sample_size
unsigned int sample_size
may contain value calculated from stsd or value from stsz atom
Definition: isom.h:187
MOVStreamContext::duration_for_fps
int64_t duration_for_fps
Definition: isom.h:233
MOVFragment::moof_offset
uint64_t moof_offset
Definition: isom.h:98
MOVTrackExt::size
unsigned size
Definition: isom.h:110
MOVContext::dv_fctx
AVFormatContext * dv_fctx
Definition: isom.h:275
MOVContext::aax_mode
unsigned int aax_mode
'aax' file has been detected
Definition: isom.h:300
MOVFragmentIndex
Definition: isom.h:150
MOVStreamContext::track_end
int64_t track_end
used for dts generation in fragmented movie files
Definition: isom.h:218
MOVStreamContext::sgpd_sync_count
uint32_t sgpd_sync_count
Definition: isom.h:225
MOVContext::fragment
MOVFragment fragment
current fragment in moof atom
Definition: isom.h:277
MOVDref::type
uint32_t type
Definition: isom.h:79
MOVStreamContext::per_sample_iv_size
unsigned int per_sample_iv_size
Definition: isom.h:257
MOVFragmentIndexItem::nb_stream_info
int nb_stream_info
Definition: isom.h:146
MOVStreamContext::has_sidx
int has_sidx
Definition: isom.h:252
MOVFragmentStreamInfo::id
int id
Definition: isom.h:133
encryption_info.h
MOVStreamContext::pb_is_copied
int pb_is_copied
Definition: isom.h:165
MOVElst::time
int64_t time
Definition: isom.h:74
MOVStreamContext::next_chunk
int next_chunk
Definition: isom.h:167
MOVContext::trak_index
int trak_index
Index of the current 'trak'.
Definition: isom.h:271
mastering_display_metadata.h
MOVContext::itunes_metadata
int itunes_metadata
metadata are itunes style
Definition: isom.h:280
MOVEncryptionIndex::auxiliary_info_sizes
uint8_t * auxiliary_info_sizes
Definition: isom.h:125
MOVFragment::stsd_id
unsigned stsd_id
Definition: isom.h:100
ff_mov_track_kind_table
const struct MP4TrackKindMapping ff_mov_track_kind_table[]
Definition: isom.c:448
ff_mp4_read_dec_config_descr
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:329
ff_mov_read_stsd_entries
int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
Definition: mov.c:2537
MOVStreamContext::stps_data
unsigned * stps_data
partial sync sample for mpeg-2 open gop
Definition: isom.h:182
MOVContext::found_hdlr_mdta
int found_hdlr_mdta
'hdlr' atom with type 'mdta' has been found
Definition: isom.h:270
MOVStreamContext::tmcd_flags
uint32_t tmcd_flags
tmcd track flags
Definition: isom.h:216
int32_t
int32_t
Definition: audioconvert.c:56
MOVAtom::type
uint32_t type
Definition: isom.h:88
MOVStreamContext::tmcd_nb_frames
uint8_t tmcd_nb_frames
tmcd number of frames per tick / second
Definition: isom.h:217
MOVFragmentIndexItem::headers_read
int headers_read
Definition: isom.h:144
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
MOVStreamContext::start_pad
int start_pad
amount of samples to skip due to enc-dec delay
Definition: isom.h:219
MP4TrackKindValueMapping::value
const char * value
Definition: isom.h:415
MOVDref::filename
char filename[64]
Definition: isom.h:83
MOVStsc::count
int count
Definition: isom.h:68
MOVStts::count
unsigned int count
Definition: isom.h:57
MOVStreamContext::display_matrix
int32_t * display_matrix
Definition: isom.h:242
MOVStreamContext::min_sample_duration
uint32_t min_sample_duration
Definition: isom.h:230
MOVStreamContext::current_index
int64_t current_index
Definition: isom.h:198
MOVFragmentStreamInfo::index_entry
int index_entry
Definition: isom.h:138
MOVStreamContext::format
uint32_t format
Definition: isom.h:250
MOVStreamContext::sync_group_count
unsigned int sync_group_count
Definition: isom.h:222
MOVContext::bitrates_count
int bitrates_count
Definition: isom.h:293
MOVContext::audible_key
void * audible_key
Definition: isom.h:307
AVStereo3D
Stereo 3D type: this structure describes how two videos are packed within a single video surface,...
Definition: stereo3d.h:176
MOVStreamContext::samples_per_frame
unsigned int samples_per_frame
Definition: isom.h:202
MOVElst::duration
int64_t duration
Definition: isom.h:73
MOVContext::seek_individually
int seek_individually
Definition: isom.h:288
MOVStreamContext::frag_index_entry_base
unsigned int frag_index_entry_base
Definition: isom.h:256
MOVStreamContext::stts_count
unsigned int stts_count
Definition: isom.h:170
MOVStreamContext::elst_count
unsigned int elst_count
Definition: isom.h:184
AVSphericalMapping
This structure describes how to handle spherical videos, outlining information about projection,...
Definition: spherical.h:82
AVAESCTR
Definition: aes_ctr.c:33
MOVContext::file_iv
uint8_t file_iv[20]
Definition: isom.h:302
MOVStreamContext::default_encrypted_sample
AVEncryptionInfo * default_encrypted_sample
Definition: isom.h:258
MOVContext::next_root_atom
int64_t next_root_atom
offset of the next root atom
Definition: isom.h:289
MOVContext::meta_keys_count
unsigned meta_keys_count
Definition: isom.h:273
MOVStreamContext::palette
uint32_t palette[256]
Definition: isom.h:213
MOVContext::have_read_mfra_size
int have_read_mfra_size
Definition: isom.h:316
MOVFragment::track_id
unsigned track_id
Definition: isom.h:96
MOVContext::ignore_chapters
int ignore_chapters
Definition: isom.h:287
MP4TrackKindMapping
Definition: isom.h:418
MOVStreamContext::ffindex
int ffindex
AVStream index.
Definition: isom.h:166