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;
105 int64_t last_resync_pos;
107 AVRational *time_base;
108 struct AVTreeNode *syncpoints;
112 AVRational *max_pts_tb;
113 #define NUT_BROADCAST 1 // use extended syncpoints
114 #define NUT_PIPE 2 // do not write syncpoints
116 int version; // version currently in use
120 extern const AVCodecTag ff_nut_subtitle_tags[];
121 extern const AVCodecTag ff_nut_video_tags[];
122 extern const AVCodecTag ff_nut_audio_tags[];
123 extern const AVCodecTag ff_nut_audio_extra_tags[];
124 extern const AVCodecTag ff_nut_data_tags[];
126 extern const AVCodecTag * const ff_nut_codec_tags[];
128 typedef struct Dispositions {
133 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
134 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
135 int ff_nut_sp_pos_cmp(const void *a, const void *b);
136 int ff_nut_sp_pts_cmp(const void *a, const void *b);
137 int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
138 void ff_nut_free_sp(NUTContext *nut);
140 extern const Dispositions ff_nut_dispositions[];
142 extern const AVMetadataConv ff_nut_metadata_conv[];
144 #endif /* AVFORMAT_NUT_H */