Statistics
| Branch: | Revision:

ffmpeg / libavformat / isom.h @ 4dcde00c

History | View | Annotate | Download (4.68 KB)

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[];
35
extern const AVCodecTag ff_codec_movsubtitle_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 {
91
    AVIOContext *pb;
92
    int ffindex;          ///< AVStream index
93
    int next_chunk;
94
    unsigned int chunk_count;
95
    int64_t *chunk_offsets;
96
    unsigned int stts_count;
97
    MOVStts *stts_data;
98
    unsigned int ctts_count;
99
    MOVStts *ctts_data;
100
    unsigned int stsc_count;
101
    MOVStsc *stsc_data;
102
    unsigned int stps_count;
103
    unsigned *stps_data;  ///< partial sync sample for mpeg-2 open gop
104
    int ctts_index;
105
    int ctts_sample;
106
    unsigned int sample_size;
107
    unsigned int sample_count;
108
    int *sample_sizes;
109
    unsigned int keyframe_count;
110
    int *keyframes;
111
    int time_scale;
112
    int time_offset;      ///< time offset of the first edit list entry
113
    int current_sample;
114
    unsigned int bytes_per_frame;
115
    unsigned int samples_per_frame;
116
    int dv_audio_container;
117
    int pseudo_stream_id; ///< -1 means demux all ids
118
    int16_t audio_cid;    ///< stsd audio compression id
119
    unsigned drefs_count;
120
    MOVDref *drefs;
121
    int dref_id;
122
    int wrong_dts;        ///< dts are wrong due to huge ctts offset (iMovie files)
123
    int width;            ///< tkhd width
124
    int height;           ///< tkhd height
125
    int dts_shift;        ///< dts shift when ctts is negative
126
} MOVStreamContext;
127

    
128
typedef struct MOVContext {
129
    AVFormatContext *fc;
130
    int time_scale;
131
    int64_t duration;     ///< duration of the longest track
132
    int found_moov;       ///< 'moov' atom has been found
133
    int found_mdat;       ///< 'mdat' atom has been found
134
    DVDemuxContext *dv_demux;
135
    AVFormatContext *dv_fctx;
136
    int isom;             ///< 1 if file is ISO Media (mp4/3gp)
137
    MOVFragment fragment; ///< current fragment in moof atom
138
    MOVTrackExt *trex_data;
139
    unsigned trex_count;
140
    int itunes_metadata;  ///< metadata are itunes style
141
    int chapter_track;
142
} MOVContext;
143

    
144
int ff_mp4_read_descr_len(AVIOContext *pb);
145
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
146
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
147

    
148
#define MP4IODescrTag                   0x02
149
#define MP4ESDescrTag                   0x03
150
#define MP4DecConfigDescrTag            0x04
151
#define MP4DecSpecificDescrTag          0x05
152

    
153
int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);
154
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
155

    
156
int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
157

    
158
#endif /* AVFORMAT_ISOM_H */