2 * "NUT" Container Format (de)muxer
3 * Copyright (c) 2006 Michael Niedermayer
5 * This file is part of FFmpeg.
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.
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.
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
22 #ifndef AVFORMAT_NUT_H
23 #define AVFORMAT_NUT_H
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))
35 #define ID_STRING "nut/multimedia container\0"
37 #define MAX_DISTANCE (1024*32-1)
39 #define NUT_MAX_VERSION 4
40 #define NUT_STABLE_VERSION 3
41 #define NUT_MIN_VERSION 2
44 FLAG_KEY
= 1, ///<if set, frame is keyframe
45 FLAG_EOR
= 2, ///<if set, stream has no relevance on presentation. (EOR)
46 FLAG_CODED_PTS
= 8, ///<if set, coded_pts is in the frame header
47 FLAG_STREAM_ID
= 16, ///<if set, stream_id is coded in the frame header
48 FLAG_SIZE_MSB
= 32, ///<if set, data_size_msb is at frame header, otherwise data_size_msb is 0
49 FLAG_CHECKSUM
= 64, ///<if set, the frame header contains a checksum
50 FLAG_RESERVED
= 128, ///<if set, reserved_count is coded in the frame header
51 FLAG_SM_DATA
= 256, ///<if set, side / meta data is stored in the frame header.
52 FLAG_HEADER_IDX
=1024, ///<If set, header_idx is coded in the frame header.
53 FLAG_MATCH_TIME
=2048, ///<If set, match_time_delta is coded in the frame header
54 FLAG_CODED
=4096, ///<if set, coded_flags are stored in the frame header
55 FLAG_INVALID
=8192, ///<if set, frame_code is invalid
58 typedef struct Syncpoint
{
61 // uint64_t global_key_pts;
65 typedef struct FrameCode
{
71 uint8_t reserved_count
;
75 typedef struct StreamContext
{
77 int skip_until_key_frame
;
80 AVRational
*time_base
;
83 int decode_delay
; //FIXME duplicate of has_b_frames
84 int64_t *keyframe_pts
;
87 typedef struct ChapterContext
{
88 AVRational
*time_base
;
91 typedef struct NUTContext
{
92 const AVClass
*av_class
;
94 // int written_packet_size;
95 // int64_t packet_start;
96 FrameCode frame_code
[256];
97 uint8_t header_len
[128];
98 const uint8_t *header
[128];
99 uint64_t next_startcode
; ///< stores the next startcode if it has already been parsed but the stream is not seekable
100 StreamContext
*stream
;
101 ChapterContext
*chapter
;
102 unsigned int max_distance
;
103 unsigned int time_base_count
;
104 int64_t last_syncpoint_pos
;
106 AVRational
*time_base
;
107 struct AVTreeNode
*syncpoints
;
111 AVRational
*max_pts_tb
;
112 #define NUT_BROADCAST 1 // use extended syncpoints
113 #define NUT_PIPE 2 // do not write syncpoints
115 int version
; // version currently in use
119 extern const AVCodecTag ff_nut_subtitle_tags
[];
120 extern const AVCodecTag ff_nut_video_tags
[];
121 extern const AVCodecTag ff_nut_audio_tags
[];
122 extern const AVCodecTag ff_nut_audio_extra_tags
[];
123 extern const AVCodecTag ff_nut_data_tags
[];
125 extern const AVCodecTag
* const ff_nut_codec_tags
[];
127 typedef struct Dispositions
{
132 void ff_nut_reset_ts(NUTContext
*nut
, AVRational time_base
, int64_t val
);
133 int64_t ff_lsb2full(StreamContext
*stream
, int64_t lsb
);
134 int ff_nut_sp_pos_cmp(const Syncpoint
*a
, const Syncpoint
*b
);
135 int ff_nut_sp_pts_cmp(const Syncpoint
*a
, const Syncpoint
*b
);
136 int ff_nut_add_sp(NUTContext
*nut
, int64_t pos
, int64_t back_ptr
, int64_t ts
);
137 void ff_nut_free_sp(NUTContext
*nut
);
139 extern const Dispositions ff_nut_dispositions
[];
141 extern const AVMetadataConv ff_nut_metadata_conv
[];
143 #endif /* AVFORMAT_NUT_H */