Statistics
| Branch: | Revision:

ffmpeg / libavformat / nut.h @ 43382b5f

History | View | Annotate | Download (4.01 KB)

1
/*
2
 * "NUT" Container Format (de)muxer
3
 * Copyright (c) 2006 Michael Niedermayer
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
#ifndef AVFORMAT_NUT_H
23
#define AVFORMAT_NUT_H
24

    
25
//#include <limits.h>
26
//#include "libavutil/adler32.h"
27
//#include "libavcodec/mpegaudio.h"
28
#include "avformat.h"
29
#include "riff.h"
30
#include "metadata.h"
31

    
32
#define      MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48))
33
#define    STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48))
34
#define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48))
35
#define     INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48))
36
#define      INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48))
37

    
38
#define ID_STRING "nut/multimedia container\0"
39

    
40
#define MAX_DISTANCE (1024*32-1)
41

    
42
typedef enum{
43
    FLAG_KEY        =   1, ///<if set, frame is keyframe
44
    FLAG_EOR        =   2, ///<if set, stream has no relevance on presentation. (EOR)
45
    FLAG_CODED_PTS  =   8, ///<if set, coded_pts is in the frame header
46
    FLAG_STREAM_ID  =  16, ///<if set, stream_id is coded in the frame header
47
    FLAG_SIZE_MSB   =  32, ///<if set, data_size_msb is at frame header, otherwise data_size_msb is 0
48
    FLAG_CHECKSUM   =  64, ///<if set, the frame header contains a checksum
49
    FLAG_RESERVED   = 128, ///<if set, reserved_count is coded in the frame header
50
    FLAG_HEADER_IDX =1024, ///<If set, header_idx is coded in the frame header.
51
    FLAG_MATCH_TIME =2048, ///<If set, match_time_delta is coded in the frame header
52
    FLAG_CODED      =4096, ///<if set, coded_flags are stored in the frame header
53
    FLAG_INVALID    =8192, ///<if set, frame_code is invalid
54
} Flag;
55

    
56
typedef struct {
57
    uint64_t pos;
58
    uint64_t back_ptr;
59
//    uint64_t global_key_pts;
60
    int64_t ts;
61
} Syncpoint;
62

    
63
typedef struct {
64
    uint16_t flags;
65
    uint8_t  stream_id;
66
    uint16_t size_mul;
67
    uint16_t size_lsb;
68
    int16_t  pts_delta;
69
    uint8_t  reserved_count;
70
    uint8_t  header_idx;
71
} FrameCode;
72

    
73
typedef struct {
74
    int last_flags;
75
    int skip_until_key_frame;
76
    int64_t last_pts;
77
    int time_base_id;
78
    AVRational *time_base;
79
    int msb_pts_shift;
80
    int max_pts_distance;
81
    int decode_delay; //FIXME duplicate of has_b_frames
82
} StreamContext;
83

    
84
typedef struct {
85
    AVFormatContext *avf;
86
//    int written_packet_size;
87
//    int64_t packet_start;
88
    FrameCode frame_code[256];
89
    uint8_t header_len[128];
90
    const uint8_t *header[128];
91
    uint64_t next_startcode;     ///< stores the next startcode if it has already been parsed but the stream is not seekable
92
    StreamContext *stream;
93
    unsigned int max_distance;
94
    unsigned int time_base_count;
95
    int64_t last_syncpoint_pos;
96
    int header_count;
97
    AVRational *time_base;
98
    struct AVTreeNode *syncpoints;
99
} NUTContext;
100

    
101
extern const AVCodecTag ff_nut_subtitle_tags[];
102

    
103
typedef struct {
104
    char str[9];
105
    int flag;
106
} Dispositions;
107

    
108
void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
109
int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
110
int ff_nut_sp_pos_cmp(Syncpoint *a, Syncpoint *b);
111
int ff_nut_sp_pts_cmp(Syncpoint *a, Syncpoint *b);
112
void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
113

    
114
extern const Dispositions ff_nut_dispositions[];
115

    
116
extern const AVMetadataConv ff_nut_metadata_conv[];
117

    
118
#endif /* AVFORMAT_NUT_H */