FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
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 
30 #include "libavutil/spherical.h"
31 #include "libavutil/stereo3d.h"
32 
33 #include "avio.h"
34 #include "internal.h"
35 #include "dv.h"
36 
37 /* isom.c */
38 extern const AVCodecTag ff_mp4_obj_type[];
39 extern const AVCodecTag ff_codec_movvideo_tags[];
40 extern const AVCodecTag ff_codec_movaudio_tags[];
42 
43 int ff_mov_iso639_to_lang(const char lang[4], int mp4);
44 int ff_mov_lang_to_iso639(unsigned code, char to[4]);
45 
46 struct AVAESCTR;
47 
48 /* the QuickTime file format is quite convoluted...
49  * it has lots of index tables, each indexing something in another one...
50  * Here we just use what is needed to read the chunks
51  */
52 
53 typedef struct MOVStts {
54  int count;
55  int duration;
56 } MOVStts;
57 
58 typedef struct MOVStsc {
59  int first;
60  int count;
61  int id;
62 } MOVStsc;
63 
64 typedef struct MOVElst {
65  int64_t duration;
66  int64_t time;
67  float rate;
68 } MOVElst;
69 
70 typedef struct MOVDref {
71  uint32_t type;
72  char *path;
73  char *dir;
74  char volume[28];
75  char filename[64];
76  int16_t nlvl_to, nlvl_from;
77 } MOVDref;
78 
79 typedef struct MOVAtom {
80  uint32_t type;
81  int64_t size; /* total size (excluding the size and type fields) */
82 } MOVAtom;
83 
84 struct MOVParseTableEntry;
85 
86 typedef struct MOVFragment {
87  unsigned track_id;
88  uint64_t base_data_offset;
89  uint64_t moof_offset;
90  uint64_t implicit_offset;
91  unsigned stsd_id;
92  unsigned duration;
93  unsigned size;
94  unsigned flags;
95  int64_t time;
96 } MOVFragment;
97 
98 typedef struct MOVTrackExt {
99  unsigned track_id;
100  unsigned stsd_id;
101  unsigned duration;
102  unsigned size;
103  unsigned flags;
104 } MOVTrackExt;
105 
106 typedef struct MOVSbgp {
107  unsigned int count;
108  unsigned int index;
109 } MOVSbgp;
110 
111 typedef struct MOVFragmentIndexItem {
112  int64_t moof_offset;
113  int64_t time;
116 
117 typedef struct MOVFragmentIndex {
118  unsigned track_id;
119  unsigned item_count;
120  unsigned current_item;
123 
124 typedef struct MOVStreamContext {
127  int ffindex; ///< AVStream index
129  unsigned int chunk_count;
130  int64_t *chunk_offsets;
131  unsigned int stts_count;
133  unsigned int ctts_count;
135  unsigned int stsc_count;
139  unsigned int stps_count;
140  unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop
142  unsigned int elst_count;
145  unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
146  unsigned int stsz_sample_size; ///< always contains sample size from stsz atom
147  unsigned int sample_count;
150  unsigned int keyframe_count;
151  int *keyframes;
153  int64_t time_offset; ///< time offset of the edit list entries
155  unsigned int bytes_per_frame;
156  unsigned int samples_per_frame;
158  int pseudo_stream_id; ///< -1 means demux all ids
159  int16_t audio_cid; ///< stsd audio compression id
160  unsigned drefs_count;
162  int dref_id;
164  int width; ///< tkhd width
165  int height; ///< tkhd height
166  int dts_shift; ///< dts shift when ctts is negative
167  uint32_t palette[256];
169  int64_t data_size;
170  uint32_t tmcd_flags; ///< tmcd track flags
171  int64_t track_end; ///< used for dts generation in fragmented movie files
172  int start_pad; ///< amount of samples to skip due to enc-dec delay
173  unsigned int rap_group_count;
175 
178 
179  /** extradata array (and size) for multiple stsd */
184 
189 
190  uint32_t format;
191 
192  int has_sidx; // If there is an sidx entry for this stream.
193  struct {
201  struct AVAESCTR* aes_ctr;
202  } cenc;
204 
205 typedef struct MOVContext {
206  const AVClass *class; ///< class for private options
209  int64_t duration; ///< duration of the longest track
210  int found_moov; ///< 'moov' atom has been found
211  int found_mdat; ///< 'mdat' atom has been found
212  int found_hdlr_mdta; ///< 'hdlr' atom with type 'mdta' has been found
213  int trak_index; ///< Index of the current 'trak'
214  char **meta_keys;
215  unsigned meta_keys_count;
218  int isom; ///< 1 if file is ISO Media (mp4/3gp)
219  MOVFragment fragment; ///< current fragment in moof atom
221  unsigned trex_count;
222  int itunes_metadata; ///< metadata are itunes style
225  unsigned int nb_chapter_tracks;
230  int64_t next_root_atom; ///< offset of the next root atom
233  int *bitrates; ///< bitrates read before streams creation
242  unsigned int aax_mode; ///< 'aax' file has been detected
253  int32_t movie_display_matrix[3][3]; ///< display matrix from mvhd
254 } MOVContext;
255 
259 void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
260 
261 #define MP4ODescrTag 0x01
262 #define MP4IODescrTag 0x02
263 #define MP4ESDescrTag 0x03
264 #define MP4DecConfigDescrTag 0x04
265 #define MP4DecSpecificDescrTag 0x05
266 #define MP4SLDescrTag 0x06
267 
268 #define MOV_TFHD_BASE_DATA_OFFSET 0x01
269 #define MOV_TFHD_STSD_ID 0x02
270 #define MOV_TFHD_DEFAULT_DURATION 0x08
271 #define MOV_TFHD_DEFAULT_SIZE 0x10
272 #define MOV_TFHD_DEFAULT_FLAGS 0x20
273 #define MOV_TFHD_DURATION_IS_EMPTY 0x010000
274 #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000
275 
276 #define MOV_TRUN_DATA_OFFSET 0x01
277 #define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04
278 #define MOV_TRUN_SAMPLE_DURATION 0x100
279 #define MOV_TRUN_SAMPLE_SIZE 0x200
280 #define MOV_TRUN_SAMPLE_FLAGS 0x400
281 #define MOV_TRUN_SAMPLE_CTS 0x800
282 
283 #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
284 #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000
285 #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000
286 #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000
287 #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000
288 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000
289 
290 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000
291 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000
292 
293 #define MOV_TKHD_FLAG_ENABLED 0x0001
294 #define MOV_TKHD_FLAG_IN_MOVIE 0x0002
295 #define MOV_TKHD_FLAG_IN_PREVIEW 0x0004
296 #define MOV_TKHD_FLAG_IN_POSTER 0x0008
297 
298 #define TAG_IS_AVCI(tag) \
299  ((tag) == MKTAG('a', 'i', '5', 'p') || \
300  (tag) == MKTAG('a', 'i', '5', 'q') || \
301  (tag) == MKTAG('a', 'i', '5', '2') || \
302  (tag) == MKTAG('a', 'i', '5', '3') || \
303  (tag) == MKTAG('a', 'i', '5', '5') || \
304  (tag) == MKTAG('a', 'i', '5', '6') || \
305  (tag) == MKTAG('a', 'i', '1', 'p') || \
306  (tag) == MKTAG('a', 'i', '1', 'q') || \
307  (tag) == MKTAG('a', 'i', '1', '2') || \
308  (tag) == MKTAG('a', 'i', '1', '3') || \
309  (tag) == MKTAG('a', 'i', '1', '5') || \
310  (tag) == MKTAG('a', 'i', '1', '6') || \
311  (tag) == MKTAG('a', 'i', 'v', 'x') || \
312  (tag) == MKTAG('A', 'V', 'i', 'n'))
313 
314 
317 
318 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
319 void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
320 
321 #define FF_MOV_FLAG_MFRA_AUTO -1
322 #define FF_MOV_FLAG_MFRA_DTS 1
323 #define FF_MOV_FLAG_MFRA_PTS 2
324 
325 #endif /* AVFORMAT_ISOM_H */
int itunes_metadata
metadata are itunes style
Definition: isom.h:222
int * bitrates
bitrates read before streams creation
Definition: isom.h:233
int64_t moof_offset
Definition: isom.h:112
Bytestream IO Context.
Definition: avio.h:147
Buffered I/O operations.
uint32_t tmcd_flags
tmcd track flags
Definition: isom.h:170
const AVCodecTag ff_mp4_obj_type[]
Definition: isom.c:34
uint8_t * auxiliary_info_end
Definition: isom.h:196
unsigned int rap_group_count
Definition: isom.h:173
unsigned int elst_count
Definition: isom.h:142
MOVTrackExt * trex_data
Definition: isom.h:220
int export_all
Definition: isom.h:231
unsigned track_id
Definition: isom.h:87
uint32_t format
Definition: isom.h:190
unsigned int samples_per_frame
Definition: isom.h:156
int dv_audio_container
Definition: isom.h:157
Definition: isom.h:53
float rate
Definition: isom.h:67
uint64_t base_data_offset
Definition: isom.h:88
int64_t duration
Definition: isom.h:65
size_t spherical_size
Definition: isom.h:188
unsigned int stsc_count
Definition: isom.h:135
int has_palette
Definition: isom.h:168
unsigned item_count
Definition: isom.h:119
uint8_t * decryption_key
Definition: isom.h:250
int ignore_chapters
Definition: isom.h:228
void * activation_bytes
Definition: isom.h:245
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:489
int16_t audio_cid
stsd audio compression id
Definition: isom.h:159
char ** meta_keys
Definition: isom.h:214
int height
tkhd height
Definition: isom.h:165
uint32_t type
Definition: isom.h:80
MOVElst * elst_data
Definition: isom.h:141
MOVStsc * stsc_data
Definition: isom.h:136
unsigned fragment_index_count
Definition: isom.h:239
int ctts_index
Definition: isom.h:143
unsigned stsd_id
Definition: isom.h:100
AVSphericalMapping * spherical
Definition: isom.h:187
int found_moov
'moov' atom has been found
Definition: isom.h:210
struct MOVStreamContext::@207 cenc
unsigned flags
Definition: isom.h:103
int isom
1 if file is ISO Media (mp4/3gp)
Definition: isom.h:218
int found_mdat
'mdat' atom has been found
Definition: isom.h:211
int width
tkhd width
Definition: isom.h:164
unsigned drefs_count
Definition: isom.h:160
Format I/O context.
Definition: avformat.h:1341
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:74
char filename[64]
Definition: isom.h:75
MOVDref * drefs
Definition: isom.h:161
int fragment_index_complete
Definition: isom.h:240
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom.c:304
uint8_t
int first
Definition: isom.h:59
uint8_t * auxiliary_info
Definition: isom.h:195
int ff_mp4_read_descr_len(AVIOContext *pb)
Definition: isom.c:442
Stereo 3D type: this structure describes how two videos are packed within a single video surface...
Definition: stereo3d.h:123
unsigned int sample_count
Definition: isom.h:147
int count
Definition: isom.h:60
int dts_shift
dts shift when ctts is negative
Definition: isom.h:166
uint8_t * auxiliary_info_pos
Definition: isom.h:197
unsigned int count
Definition: isom.h:107
int16_t nlvl_to
Definition: isom.h:76
char volume[28]
Definition: isom.h:74
int stsd_count
Definition: isom.h:183
int activation_bytes_size
Definition: isom.h:246
MOVFragmentIndex ** fragment_index_data
Definition: isom.h:238
static int flags
Definition: log.c:57
uint32_t tag
Definition: movenc.c:1412
int nb_frames_for_fps
Definition: isom.h:176
struct AVAESCTR * aes_ctr
Definition: isom.h:201
const AVCodecTag ff_codec_movsubtitle_tags[]
Definition: isom.c:360
int current_sample
Definition: isom.h:154
int32_t movie_display_matrix[3][3]
display matrix from mvhd
Definition: isom.h:253
unsigned track_id
Definition: isom.h:99
const char * to
Definition: webvttdec.c:34
int64_t time_offset
time offset of the edit list entries
Definition: isom.h:153
unsigned int keyframe_count
Definition: isom.h:150
int * extradata_size
Definition: isom.h:181
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:191
unsigned int ctts_count
Definition: isom.h:133
int stsc_sample
Definition: isom.h:138
int atom_depth
Definition: isom.h:241
int * keyframes
Definition: isom.h:151
AVFormatContext * fc
Definition: isom.h:207
int handbrake_version
Definition: isom.h:223
int ctts_sample
Definition: isom.h:144
int keyframe_absent
Definition: isom.h:149
int16_t nlvl_from
Definition: isom.h:76
void * audible_fixed_key
Definition: isom.h:247
int use_subsamples
Definition: isom.h:194
int64_t time
Definition: isom.h:113
int stsc_index
Definition: isom.h:137
uint8_t file_key[20]
Definition: isom.h:243
struct AVAES * aes_decrypt
Definition: isom.h:249
static const uint16_t fc[]
Definition: dcaenc.h:41
uint8_t auxiliary_info_default_size
Definition: isom.h:198
Spherical video.
char * dir
Definition: isom.h:73
int id
Definition: isom.h:61
int decryption_key_len
Definition: isom.h:251
int32_t
int audible_fixed_key_size
Definition: isom.h:248
char * path
Definition: isom.h:72
int time_scale
Definition: isom.h:152
int64_t time
Definition: isom.h:95
MOVFragmentIndexItem * items
Definition: isom.h:121
Definition: isom.h:106
uint64_t moof_offset
Definition: isom.h:89
MOVStts * ctts_data
Definition: isom.h:134
unsigned size
Definition: isom.h:102
void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout)
Definition: isom.c:618
int ignore_editlist
Definition: isom.h:227
int64_t * chunk_offsets
Definition: isom.h:130
unsigned int index
Definition: isom.h:108
int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
Definition: mov.c:765
unsigned current_item
Definition: isom.h:120
size_t auxiliary_info_sizes_count
Definition: isom.h:200
int64_t duration
duration of the longest track
Definition: isom.h:209
Stream structure.
Definition: avformat.h:889
unsigned duration
Definition: isom.h:101
DVDemuxContext * dv_demux
Definition: isom.h:216
int timecode_track
Definition: isom.h:163
int * sample_sizes
Definition: isom.h:148
unsigned duration
Definition: isom.h:92
MOVSbgp * rap_group
Definition: isom.h:174
int duration
Definition: isom.h:55
int * chapter_tracks
Definition: isom.h:224
unsigned int stsz_sample_size
always contains sample size from stsz atom
Definition: isom.h:146
unsigned trex_count
Definition: isom.h:221
int enable_drefs
Definition: isom.h:252
int64_t data_size
Definition: isom.h:169
int has_looked_for_mfra
Definition: isom.h:237
uint32_t type
Definition: isom.h:71
MOVStts * stts_data
Definition: isom.h:132
Describe the class of an AVClass context structure.
Definition: log.h:67
int count
Definition: isom.h:54
unsigned int aax_mode
'aax' file has been detected
Definition: isom.h:242
MOVFragment fragment
current fragment in moof atom
Definition: isom.h:219
int64_t track_end
used for dts generation in fragmented movie files
Definition: isom.h:171
Definition: isom.h:79
int use_mfra_for
Definition: isom.h:236
int64_t time
Definition: isom.h:66
int pb_is_copied
Definition: isom.h:126
int ff_mov_lang_to_iso639(unsigned code, char to[4])
Definition: isom.c:420
This structure describes how to handle spherical videos, outlining information about projection...
Definition: spherical.h:75
int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
Definition: mov.c:2243
int next_chunk
Definition: isom.h:128
AVFormatContext * dv_fctx
Definition: isom.h:217
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:455
uint64_t implicit_offset
Definition: isom.h:90
AVStereo3D * stereo3d
Definition: isom.h:186
unsigned * stps_data
partial sync sample for mpeg-2 open gop
Definition: isom.h:140
uint8_t * auxiliary_info_sizes
Definition: isom.h:199
int ff_mov_iso639_to_lang(const char lang[4], int mp4)
Definition: isom.c:393
int start_pad
amount of samples to skip due to enc-dec delay
Definition: isom.h:172
int trak_index
Index of the current 'trak'.
Definition: isom.h:213
int32_t * display_matrix
Definition: isom.h:185
AVIOContext * pb
Definition: isom.h:125
unsigned int bytes_per_frame
Definition: isom.h:155
unsigned flags
Definition: isom.h:94
int bitrates_count
Definition: isom.h:234
int64_t size
Definition: isom.h:81
int export_xmp
Definition: isom.h:232
int seek_individually
Definition: isom.h:229
unsigned int stps_count
Definition: isom.h:139
unsigned int chunk_count
Definition: isom.h:129
unsigned bps
Definition: movenc.c:1413
unsigned meta_keys_count
Definition: isom.h:215
uint32_t palette[256]
Definition: isom.h:167
unsigned stsd_id
Definition: isom.h:91
unsigned int stts_count
Definition: isom.h:131
unsigned int sample_size
may contain value calculated from stsd or value from stsz atom
Definition: isom.h:145
uint8_t file_iv[20]
Definition: isom.h:244
static AVCodec * c
enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
Compute codec id for 'lpcm' tag.
Definition: mov.c:1798
int64_t next_root_atom
offset of the next root atom
Definition: isom.h:230
int last_stsd_index
Definition: isom.h:182
unsigned int nb_chapter_tracks
Definition: isom.h:225
int time_scale
Definition: isom.h:208
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:464
Definition: isom.h:64
int pseudo_stream_id
-1 means demux all ids
Definition: isom.h:158
int ffindex
AVStream index.
Definition: isom.h:127
uint8_t ** extradata
extradata array (and size) for multiple stsd
Definition: isom.h:180
int use_absolute_path
Definition: isom.h:226
unsigned size
Definition: isom.h:93
int64_t duration_for_fps
Definition: isom.h:177
unsigned track_id
Definition: isom.h:118
int moov_retry
Definition: isom.h:235
int found_hdlr_mdta
'hdlr' atom with type 'mdta' has been found
Definition: isom.h:212
Definition: isom.h:58
int has_sidx
Definition: isom.h:192
Definition: isom.h:70