Libav
nut.h
Go to the documentation of this file.
1 /*
2  * "NUT" Container Format (de)muxer
3  * Copyright (c) 2006 Michael Niedermayer
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; 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 "avformat.h"
26 #include "internal.h"
27 #include "metadata.h"
28 
29 #define MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48))
30 #define STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48))
31 #define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48))
32 #define INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48))
33 #define INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48))
34 
35 #define ID_STRING "nut/multimedia container\0"
36 
37 #define MAX_DISTANCE (1024*32-1)
38 
39 #define NUT_VERSION 3
40 
41 typedef enum{
42  FLAG_KEY = 1,
43  FLAG_EOR = 2,
48  FLAG_RESERVED = 128,
51  FLAG_CODED =4096,
52  FLAG_INVALID =8192,
53 } Flag;
54 
55 typedef struct Syncpoint {
56  uint64_t pos;
57  uint64_t back_ptr;
58 // uint64_t global_key_pts;
59  int64_t ts;
60 } Syncpoint;
61 
62 typedef struct FrameCode {
63  uint16_t flags;
65  uint16_t size_mul;
66  uint16_t size_lsb;
67  int16_t pts_delta;
70 } FrameCode;
71 
72 typedef struct StreamContext {
75  int64_t last_pts;
80  int decode_delay; //FIXME duplicate of has_b_frames
82 
83 typedef struct ChapterContext {
86 
87 typedef struct NUTContext {
89 // int written_packet_size;
90 // int64_t packet_start;
93  const uint8_t *header[128];
94  uint64_t next_startcode;
97  unsigned int max_distance;
98  unsigned int time_base_count;
103 } NUTContext;
104 
105 extern const AVCodecTag ff_nut_subtitle_tags[];
106 extern const AVCodecTag ff_nut_video_tags[];
107 extern const AVCodecTag ff_nut_audio_tags[];
108 extern const AVCodecTag ff_nut_data_tags[];
109 
110 extern const AVCodecTag * const ff_nut_codec_tags[];
111 
112 typedef struct Dispositions {
113  char str[9];
114  int flag;
115 } Dispositions;
116 
117 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
118 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
119 int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b);
120 int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b);
121 int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
122 void ff_nut_free_sp(NUTContext *nut);
123 
124 extern const Dispositions ff_nut_dispositions[];
125 
126 extern const AVMetadataConv ff_nut_metadata_conv[];
127 
128 #endif /* AVFORMAT_NUT_H */
uint8_t header_len[128]
Definition: nut.h:92
int64_t last_syncpoint_pos
Definition: nut.h:99
Definition: nut.h:62
int64_t ff_lsb2full(StreamContext *stream, int64_t lsb)
Definition: nut.c:171
Definition: nut.h:55
int64_t ts
Definition: nut.h:59
Definition: nut.h:87
uint8_t stream_id
Definition: nut.h:64
const AVCodecTag ff_nut_audio_tags[]
Definition: nut.c:127
Flag
Definition: nut.h:41
const uint8_t * header[128]
Definition: nut.h:93
Format I/O context.
Definition: avformat.h:871
if set, reserved_count is coded in the frame header
Definition: nut.h:48
void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val)
Definition: nut.c:160
internal metadata API header see avformat.h or the public API!
uint8_t
AVRational * time_base
Definition: nut.h:101
int decode_delay
Definition: nut.h:80
uint16_t flags
Definition: nut.h:63
if set, coded_pts is in the frame header
Definition: nut.h:44
#define b
Definition: input.c:52
If set, match_time_delta is coded in the frame header.
Definition: nut.h:50
const Dispositions ff_nut_dispositions[]
Definition: nut.c:223
int last_flags
Definition: nut.h:73
AVFormatContext * avf
Definition: nut.h:88
int64_t last_pts
Definition: nut.h:75
uint64_t pos
Definition: nut.h:56
int header_count
Definition: nut.h:100
AVRational * time_base
Definition: nut.h:77
int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b)
Definition: nut.c:178
if set, frame is keyframe
Definition: nut.h:42
const AVCodecTag ff_nut_video_tags[]
Definition: nut.c:41
const AVCodecTag ff_nut_data_tags[]
Definition: nut.c:36
uint8_t header_idx
Definition: nut.h:69
uint16_t size_lsb
Definition: nut.h:66
int16_t pts_delta
Definition: nut.h:67
if set, frame_code is invalid
Definition: nut.h:52
struct AVTreeNode * syncpoints
Definition: nut.h:102
if set, data_size_msb is at frame header, otherwise data_size_msb is 0
Definition: nut.h:46
ChapterContext * chapter
Definition: nut.h:96
if set, the frame header contains a checksum
Definition: nut.h:47
uint16_t size_mul
Definition: nut.h:65
int msb_pts_shift
Definition: nut.h:78
void ff_nut_free_sp(NUTContext *nut)
Definition: nut.c:217
int max_pts_distance
Definition: nut.h:79
int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts)
Definition: nut.c:188
int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b)
Definition: nut.c:183
if set, coded_flags are stored in the frame header
Definition: nut.h:51
if set, stream has no relevance on presentation. (EOR)
Definition: nut.h:43
const AVCodecTag ff_nut_subtitle_tags[]
Definition: nut.c:28
rational number numerator/denominator
Definition: rational.h:43
AVRational * time_base
Definition: nut.h:84
StreamContext * stream
Definition: nut.h:95
char str[9]
Definition: nut.h:113
int skip_until_key_frame
Definition: nut.h:74
Main libavformat public API header.
uint64_t next_startcode
stores the next startcode if it has already been parsed but the stream is not seekable ...
Definition: nut.h:94
FrameCode frame_code[256]
Definition: nut.h:91
int flag
Definition: nut.h:114
If set, header_idx is coded in the frame header.
Definition: nut.h:49
int time_base_id
Definition: nut.h:76
if set, stream_id is coded in the frame header
Definition: nut.h:45
uint64_t back_ptr
Definition: nut.h:57
const AVMetadataConv ff_nut_metadata_conv[]
Definition: nut.c:233
unsigned int time_base_count
Definition: nut.h:98
const AVCodecTag *const ff_nut_codec_tags[]
Definition: nut.c:155
uint8_t reserved_count
Definition: nut.h:68
unsigned int max_distance
Definition: nut.h:97