aboutsummaryrefslogtreecommitdiffstats
path: root/libavformat/nut.h
blob: 39743db1b3ac361e8978b0ef609ee6d4bc13fb63 (plain) (blame)
1
2
3
4
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
34
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
73
74
75
76
77
78
79
80
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
119
120
121
122
123
124
125
126
127
128
129
/*
 * "NUT" Container Format (de)muxer
 * Copyright (c) 2006 Michael Niedermayer
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg 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.
 *
 * FFmpeg 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 FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVFORMAT_NUT_H
#define AVFORMAT_NUT_H

//#include <limits.h>
//#include "libavutil/adler32.h"
//#include "libavcodec/mpegaudio.h"
#include "avformat.h"
#include "riff.h"
#include "metadata.h"

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

#define ID_STRING "nut/multimedia container\0"

#define MAX_DISTANCE (1024*32-1)

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

typedef struct {
    uint64_t pos;
    uint64_t back_ptr;
//    uint64_t global_key_pts;
    int64_t ts;
} Syncpoint;

typedef struct {
    uint16_t flags;
    uint8_t  stream_id;
    uint16_t size_mul;
    uint16_t size_lsb;
    int16_t  pts_delta;
    uint8_t  reserved_count;
    uint8_t  header_idx;
} FrameCode;

typedef struct {
    int last_flags;
    int skip_until_key_frame;
    int64_t last_pts;
    int time_base_id;
    AVRational *time_base;
    int msb_pts_shift;
    int max_pts_distance;
    int decode_delay; //FIXME duplicate of has_b_frames
    int64_t *keyframe_pts;
} StreamContext;

typedef struct {
    AVRational *time_base;
} ChapterContext;

typedef struct {
    AVFormatContext *avf;
//    int written_packet_size;
//    int64_t packet_start;
    FrameCode frame_code[256];
    uint8_t header_len[128];
    const uint8_t *header[128];
    uint64_t next_startcode;     ///< stores the next startcode if it has already been parsed but the stream is not seekable
    StreamContext *stream;
    ChapterContext *chapter;
    unsigned int max_distance;
    unsigned int time_base_count;
    int64_t last_syncpoint_pos;
    int header_count;
    AVRational *time_base;
    struct AVTreeNode *syncpoints;
    int sp_count;
    int64_t max_pts;
    AVRational *max_pts_tb;
} NUTContext;

extern const AVCodecTag ff_nut_subtitle_tags[];
extern const AVCodecTag ff_nut_video_tags[];

typedef struct {
    char str[9];
    int flag;
} Dispositions;

void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b);
int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b);
void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
void ff_nut_free_sp(NUTContext *nut);

extern const Dispositions ff_nut_dispositions[];

extern const AVMetadataConv ff_nut_metadata_conv[];

#endif /* AVFORMAT_NUT_H */