Statistics
| Branch: | Revision:

ffmpeg / libavformat / nut.h @ 890d2799

History | View | Annotate | Download (3.63 KB)

1 619d8e2e Michael Niedermayer
/*
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 5b21bdab Diego Biurrun
#ifndef FFMPEG_NUT_H
23
#define FFMPEG_NUT_H
24 699b3f99 Måns Rullgård
25 619d8e2e Michael Niedermayer
//#include <limits.h>
26
#include "avformat.h"
27
//#include "mpegaudio.h"
28
#include "riff.h"
29
//#include "adler32.h"
30
31
#define      MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48))
32
#define    STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48))
33
#define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48))
34
#define     INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48))
35
#define      INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48))
36
37
#define ID_STRING "nut/multimedia container\0"
38
39
#define MAX_DISTANCE (1024*32-1)
40
41
typedef enum{
42
    FLAG_KEY        =   1, ///<if set, frame is keyframe
43
    FLAG_EOR        =   2, ///<if set, stream has no relevance on presentation. (EOR)
44
    FLAG_CODED_PTS  =   8, ///<if set, coded_pts is in the frame header
45
    FLAG_STREAM_ID  =  16, ///<if set, stream_id is coded in the frame header
46
    FLAG_SIZE_MSB   =  32, ///<if set, data_size_msb is at frame header, otherwise data_size_msb is 0
47 93951943 Diego Biurrun
    FLAG_CHECKSUM   =  64, ///<if set, the frame header contains a checksum
48 619d8e2e Michael Niedermayer
    FLAG_RESERVED   = 128, ///<if set, reserved_count is coded in the frame header
49 93951943 Diego Biurrun
    FLAG_CODED      =4096, ///<if set, coded_flags are stored in the frame header
50
    FLAG_INVALID    =8192, ///<if set, frame_code is invalid
51 619d8e2e Michael Niedermayer
}flag_t;
52
53
typedef struct {
54 4d5be986 Michael Niedermayer
    uint64_t pos;
55
    uint64_t back_ptr;
56
//    uint64_t global_key_pts;
57
    int64_t ts;
58 619d8e2e Michael Niedermayer
} syncpoint_t;
59
60
typedef struct {
61
    uint16_t flags;
62
    uint8_t  stream_id;
63
    uint16_t size_mul;
64
    uint16_t size_lsb;
65
    int16_t  pts_delta;
66
    uint8_t  reserved_count;
67 755bfeab Diego Biurrun
} FrameCode; // maybe s/FrameCode/framecode_t/ or change all to Java style but do not mix
68 619d8e2e Michael Niedermayer
69
typedef struct {
70 f7c9f48d Michael Niedermayer
    int last_flags;
71
    int skip_until_key_frame;
72 619d8e2e Michael Niedermayer
    int64_t last_pts;
73
    int time_base_id;
74 efd8f22a Michael Niedermayer
    AVRational *time_base;
75 619d8e2e Michael Niedermayer
    int msb_pts_shift;
76
    int max_pts_distance;
77
    int decode_delay; //FIXME duplicate of has_b_frames
78
} StreamContext;// maybe s/StreamContext/streamcontext_t/
79
80
typedef struct {
81
    AVFormatContext *avf;
82 8d9a3f7e Michael Niedermayer
//    int written_packet_size;
83
//    int64_t packet_start;
84 619d8e2e Michael Niedermayer
    FrameCode frame_code[256];
85 755bfeab Diego Biurrun
    uint64_t next_startcode;     ///< stores the next startcode if it has already been parsed but the stream is not seekable
86 619d8e2e Michael Niedermayer
    StreamContext *stream;
87
    unsigned int max_distance;
88
    unsigned int time_base_count;
89
    int64_t last_syncpoint_pos;
90 14b3f996 Michael Niedermayer
    int header_count;
91 619d8e2e Michael Niedermayer
    AVRational *time_base;
92 4d5be986 Michael Niedermayer
    struct AVTreeNode *syncpoints;
93 619d8e2e Michael Niedermayer
} NUTContext;
94
95 874abace Michael Niedermayer
void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
96 f13ea4e0 Michael Niedermayer
int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
97 4a3b5fe1 Michael Niedermayer
int ff_nut_sp_pos_cmp(syncpoint_t *a, syncpoint_t *b);
98
int ff_nut_sp_pts_cmp(syncpoint_t *a, syncpoint_t *b);
99
void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
100 874abace Michael Niedermayer
101 5b21bdab Diego Biurrun
#endif /* FFMPEG_NUT_H */