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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 "avio.h"
28 #include "internal.h"
29 #include "dv.h"
30 
31 /* isom.c */
32 extern const AVCodecTag ff_mp4_obj_type[];
33 extern const AVCodecTag ff_codec_movvideo_tags[];
34 extern const AVCodecTag ff_codec_movaudio_tags[];
36 
37 int ff_mov_iso639_to_lang(const char lang[4], int mp4);
38 int ff_mov_lang_to_iso639(unsigned code, char to[4]);
39 
40 /* the QuickTime file format is quite convoluted...
41  * it has lots of index tables, each indexing something in another one...
42  * Here we just use what is needed to read the chunks
43  */
44 
45 typedef struct MOVStts {
46  int count;
47  int duration;
48 } MOVStts;
49 
50 typedef struct MOVStsc {
51  int first;
52  int count;
53  int id;
54 } MOVStsc;
55 
56 typedef struct MOVDref {
57  uint32_t type;
58  char *path;
59  char *dir;
60  char volume[28];
61  char filename[64];
62  int16_t nlvl_to, nlvl_from;
63 } MOVDref;
64 
65 typedef struct MOVAtom {
66  uint32_t type;
67  int64_t size; /* total size (excluding the size and type fields) */
68 } MOVAtom;
69 
70 struct MOVParseTableEntry;
71 
72 typedef struct MOVFragment {
73  unsigned track_id;
74  uint64_t base_data_offset;
75  uint64_t moof_offset;
76  uint64_t implicit_offset;
77  unsigned stsd_id;
78  unsigned duration;
79  unsigned size;
80  unsigned flags;
81  int64_t time;
82 } MOVFragment;
83 
84 typedef struct MOVTrackExt {
85  unsigned track_id;
86  unsigned stsd_id;
87  unsigned duration;
88  unsigned size;
89  unsigned flags;
90 } MOVTrackExt;
91 
92 typedef struct MOVSbgp {
93  unsigned int count;
94  unsigned int index;
95 } MOVSbgp;
96 
97 typedef struct MOVFragmentIndexItem {
98  int64_t moof_offset;
99  int64_t time;
101 
102 typedef struct MOVFragmentIndex {
103  unsigned track_id;
104  unsigned item_count;
105  unsigned current_item;
108 
109 typedef struct MOVStreamContext {
112  int ffindex; ///< AVStream index
114  unsigned int chunk_count;
115  int64_t *chunk_offsets;
116  unsigned int stts_count;
118  unsigned int ctts_count;
120  unsigned int stsc_count;
122  unsigned int stps_count;
123  unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop
126  unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
127  unsigned int stsz_sample_size; ///< always contains sample size from stsz atom
128  unsigned int sample_count;
131  unsigned int keyframe_count;
132  int *keyframes;
134  int64_t empty_duration; ///< empty duration of the first edit list entry
135  int64_t start_time; ///< start time of the media
136  int64_t time_offset; ///< time offset of the edit list entries
138  unsigned int bytes_per_frame;
139  unsigned int samples_per_frame;
141  int pseudo_stream_id; ///< -1 means demux all ids
142  int16_t audio_cid; ///< stsd audio compression id
143  unsigned drefs_count;
145  int dref_id;
147  int wrong_dts; ///< dts are wrong due to huge ctts offset (iMovie files)
148  int width; ///< tkhd width
149  int height; ///< tkhd height
150  int dts_shift; ///< dts shift when ctts is negative
151  uint32_t palette[256];
153  int64_t data_size;
154  uint32_t tmcd_flags; ///< tmcd track flags
155  int64_t track_end; ///< used for dts generation in fragmented movie files
156  int start_pad; ///< amount of samples to skip due to enc-dec delay
157  unsigned int rap_group_count;
159 
162 
165 
166 typedef struct MOVContext {
167  const AVClass *class; ///< class for private options
170  int64_t duration; ///< duration of the longest track
171  int found_moov; ///< 'moov' atom has been found
172  int found_mdat; ///< 'mdat' atom has been found
175  int isom; ///< 1 if file is ISO Media (mp4/3gp)
176  MOVFragment fragment; ///< current fragment in moof atom
178  unsigned trex_count;
179  int itunes_metadata; ///< metadata are itunes style
183  int64_t next_root_atom; ///< offset of the next root atom
186  int *bitrates; ///< bitrates read before streams creation
194 } MOVContext;
195 
199 void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
200 
201 #define MP4ODescrTag 0x01
202 #define MP4IODescrTag 0x02
203 #define MP4ESDescrTag 0x03
204 #define MP4DecConfigDescrTag 0x04
205 #define MP4DecSpecificDescrTag 0x05
206 #define MP4SLDescrTag 0x06
207 
208 #define MOV_TFHD_BASE_DATA_OFFSET 0x01
209 #define MOV_TFHD_STSD_ID 0x02
210 #define MOV_TFHD_DEFAULT_DURATION 0x08
211 #define MOV_TFHD_DEFAULT_SIZE 0x10
212 #define MOV_TFHD_DEFAULT_FLAGS 0x20
213 #define MOV_TFHD_DURATION_IS_EMPTY 0x010000
214 #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000
215 
216 #define MOV_TRUN_DATA_OFFSET 0x01
217 #define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04
218 #define MOV_TRUN_SAMPLE_DURATION 0x100
219 #define MOV_TRUN_SAMPLE_SIZE 0x200
220 #define MOV_TRUN_SAMPLE_FLAGS 0x400
221 #define MOV_TRUN_SAMPLE_CTS 0x800
222 
223 #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
224 #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000
225 #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000
226 #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000
227 #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000
228 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000
229 
230 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000
231 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000
232 
233 #define MOV_TKHD_FLAG_ENABLED 0x0001
234 #define MOV_TKHD_FLAG_IN_MOVIE 0x0002
235 #define MOV_TKHD_FLAG_IN_PREVIEW 0x0004
236 #define MOV_TKHD_FLAG_IN_POSTER 0x0008
237 
238 #define TAG_IS_AVCI(tag) \
239  ((tag) == MKTAG('a', 'i', '5', 'p') || \
240  (tag) == MKTAG('a', 'i', '5', 'q') || \
241  (tag) == MKTAG('a', 'i', '5', '2') || \
242  (tag) == MKTAG('a', 'i', '5', '3') || \
243  (tag) == MKTAG('a', 'i', '5', '5') || \
244  (tag) == MKTAG('a', 'i', '5', '6') || \
245  (tag) == MKTAG('a', 'i', '1', 'p') || \
246  (tag) == MKTAG('a', 'i', '1', 'q') || \
247  (tag) == MKTAG('a', 'i', '1', '2') || \
248  (tag) == MKTAG('a', 'i', '1', '3') || \
249  (tag) == MKTAG('a', 'i', '1', '5') || \
250  (tag) == MKTAG('a', 'i', '1', '6') || \
251  (tag) == MKTAG('a', 'i', 'v', 'x') || \
252  (tag) == MKTAG('A', 'V', 'i', 'n'))
253 
254 
257 
258 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
259 void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
260 
261 #define FF_MOV_FLAG_MFRA_AUTO -1
262 #define FF_MOV_FLAG_MFRA_DTS 1
263 #define FF_MOV_FLAG_MFRA_PTS 2
264 
265 #endif /* AVFORMAT_ISOM_H */