mp4.h 5.97 KB
Newer Older
1
2
3
/*****************************************************************************
 * mp4.h : MP4 file input module for vlc
 *****************************************************************************
4
 * Copyright (C) 2001-2004, 2010, 2014 VLC authors and VideoLAN
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 *
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/
#ifndef _VLC_MP4_H
#define _VLC_MP4_H 1

/*****************************************************************************
 * Preamble
 *****************************************************************************/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <vlc_common.h>
#include "libmp4.h"
34
#include "../asf/asfpacket.h"
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72

/* Contain all information about a chunk */
typedef struct
{
    uint64_t     i_offset; /* absolute position of this chunk in the file */
    uint32_t     i_sample_description_index; /* index for SampleEntry to use */
    uint32_t     i_sample_count; /* how many samples in this chunk */
    uint32_t     i_sample_first; /* index of the first sample in this chunk */
    uint32_t     i_sample; /* index of the next sample to read in this chunk */

    /* now provide way to calculate pts, dts, and offset without too
        much memory and with fast access */

    /* with this we can calculate dts/pts without waste memory */
    uint64_t     i_first_dts;   /* DTS of the first sample */
    uint64_t     i_last_dts;    /* DTS of the last sample */
    uint32_t     *p_sample_count_dts;
    uint32_t     *p_sample_delta_dts;   /* dts delta */

    uint32_t     *p_sample_count_pts;
    int32_t      *p_sample_offset_pts;  /* pts-dts */

    uint8_t      **p_sample_data;     /* set when b_fragmented is true */
    uint32_t     *p_sample_size;
    /* TODO if needed add pts
        but quickly *add* support for edts and seeking */

} mp4_chunk_t;

 /* Contain all needed information for read all track with vlc */
typedef struct
{
    unsigned int i_track_ID;/* this should be unique */

    int b_ok;               /* The track is usable */
    int b_enable;           /* is the trak enable by default */
    bool b_selected;  /* is the trak being played */
    bool b_chapter;   /* True when used for chapter only */
73
    uint32_t i_switch_group;
74
75
76
77

    bool b_mac_encoding;

    es_format_t fmt;
78
    uint32_t    i_block_flags;
79
80
    uint8_t     rgi_chans_reordering[AOUT_CHAN_MAX];
    bool        b_chans_reorder;
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
    es_out_id_t *p_es;

    /* display size only ! */
    int i_width;
    int i_height;
    float f_rotation;

    /* more internal data */
    uint32_t        i_timescale;    /* time scale for this track only */
    uint16_t        current_qid;    /* Smooth Streaming quality level ID */

    /* elst */
    int             i_elst;         /* current elst */
    int64_t         i_elst_time;    /* current elst start time (in movie time scale)*/
    MP4_Box_t       *p_elst;        /* elst (could be NULL) */

    /* give the next sample to read, i_chunk is to find quickly where
      the sample is located */
    uint32_t         i_sample;       /* next sample to read */
    uint32_t         i_chunk;        /* chunk where next sample is stored */
    /* total count of chunk and sample */
    uint32_t         i_chunk_count;
    uint32_t         i_sample_count;

    mp4_chunk_t    *chunk; /* always defined  for each chunk */
    mp4_chunk_t    *cchunk; /* current chunk if b_fragmented is true */

    /* sample size, p_sample_size defined only if i_sample_size == 0
        else i_sample_size is size for all sample */
    uint32_t         i_sample_size;
    uint32_t         *p_sample_size; /* XXX perhaps add file offset if take
                                    too much time to do sumations each time*/

    uint32_t     i_sample_first; /* i_sample_first value
                                                   of the next chunk */
    uint64_t     i_first_dts;    /* i_first_dts value
                                                   of the next chunk */

119
    MP4_Box_t *p_track;
120
121
122
123
124
125
126
127
128
129
    MP4_Box_t *p_stbl;  /* will contain all timing information */
    MP4_Box_t *p_stsd;  /* will contain all data to initialize decoder */
    MP4_Box_t *p_sample;/* point on actual sdsd */

    bool b_drms;
    bool b_has_non_empty_cchunk;
    bool b_codec_need_restart;
    void      *p_drms;
    MP4_Box_t *p_skcr;

130
    mtime_t i_time; // track scaled
131
132
133
134
135
136
137
138
139
140

    struct
    {
        /* for moof parsing */
        MP4_Box_t *p_traf;
        MP4_Box_t *p_tfhd;
        MP4_Box_t *p_trun;
        uint64_t   i_traf_base_offset;
    } context;

141
142
143
144
145
    /* ASF packets handling */
    MP4_Box_t       *p_asf;
    mtime_t          i_dts_backup;
    mtime_t          i_pts_backup;
    asf_track_info_t asfinfo;
146
147
148
149
150
151
152
} mp4_track_t;

typedef struct mp4_fragment_t mp4_fragment_t;
struct mp4_fragment_t
{
    uint64_t i_chunk_range_min_offset;
    uint64_t i_chunk_range_max_offset;
153
154
155
156
157
158
    struct
    {
        unsigned int i_track_ID;
        uint64_t i_duration; // movie scaled
    } *p_durations;
    unsigned int i_durations;
159
160
161
162
    MP4_Box_t *p_moox;
    mp4_fragment_t *p_next;
};

163
164
165
int SetupVideoES( demux_t *p_demux, mp4_track_t *p_track, MP4_Box_t *p_sample );
int SetupAudioES( demux_t *p_demux, mp4_track_t *p_track, MP4_Box_t *p_sample );
int SetupSpuES( demux_t *p_demux, mp4_track_t *p_track, MP4_Box_t *p_sample );
166
void SetupMeta( vlc_meta_t *p_meta, MP4_Box_t *p_udta );
167
#endif