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 Libav.
8  *
9  * Libav 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  * Libav 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 Libav; 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 codec_movvideo_tags[];
34 extern const AVCodecTag 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 {
46  int count;
47  int duration;
48 } MOVStts;
49 
50 typedef struct {
51  int first;
52  int count;
53  int id;
54 } MOVStsc;
55 
56 typedef struct {
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 {
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 {
73  unsigned track_id;
74  uint64_t base_data_offset;
75  uint64_t moof_offset;
76  unsigned stsd_id;
77  unsigned duration;
78  unsigned size;
79  unsigned flags;
80 } MOVFragment;
81 
82 typedef struct {
83  unsigned track_id;
84  unsigned stsd_id;
85  unsigned duration;
86  unsigned size;
87  unsigned flags;
88 } MOVTrackExt;
89 
90 typedef struct MOVStreamContext {
92  int ffindex;
94  unsigned int chunk_count;
95  int64_t *chunk_offsets;
96  unsigned int stts_count;
98  unsigned int ctts_count;
100  unsigned int stsc_count;
102  unsigned int stps_count;
103  unsigned *stps_data;
106  unsigned int sample_size;
107  unsigned int sample_count;
109  unsigned int keyframe_count;
110  int *keyframes;
112  int64_t time_offset;
114  unsigned int bytes_per_frame;
115  unsigned int samples_per_frame;
118  int16_t audio_cid;
119  unsigned drefs_count;
121  int dref_id;
122  int wrong_dts;
123  int width;
124  int height;
125  int dts_shift;
126  uint32_t palette[256];
129 
130 typedef struct MOVContext {
133  int64_t duration;
138  int isom;
141  unsigned trex_count;
144 } MOVContext;
145 
149 void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
150 
151 #define MP4ODescrTag 0x01
152 #define MP4IODescrTag 0x02
153 #define MP4ESDescrTag 0x03
154 #define MP4DecConfigDescrTag 0x04
155 #define MP4DecSpecificDescrTag 0x05
156 #define MP4SLDescrTag 0x06
157 
160 
161 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
162 
163 #endif /* AVFORMAT_ISOM_H */