2 * "NUT" Container Format (de)muxer
3 * Copyright (c) 2006 Michael Niedermayer
5 * This file is part of Libav.
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.
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.
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
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_HEADER_IDX =1024, ///<If set, header_idx is coded in the frame header.
52 FLAG_MATCH_TIME =2048, ///<If set, match_time_delta is coded in the frame header
53 FLAG_CODED =4096, ///<if set, coded_flags are stored in the frame header
54 FLAG_INVALID =8192, ///<if set, frame_code is invalid
57 typedef struct Syncpoint {
60 // uint64_t global_key_pts;
64 typedef struct FrameCode {
70 uint8_t reserved_count;
74 typedef struct StreamContext {
76 int skip_until_key_frame;
79 AVRational *time_base;
82 int decode_delay; //FIXME duplicate of has_b_frames
85 typedef struct ChapterContext {
86 AVRational *time_base;
89 typedef struct NUTContext {
90 const AVClass *av_class;
92 // int written_packet_size;
93 // int64_t packet_start;
94 FrameCode frame_code[256];
95 uint8_t header_len[128];
96 const uint8_t *header[128];
97 uint64_t next_startcode; ///< stores the next startcode if it has already been parsed but the stream is not seekable
98 StreamContext *stream;
99 ChapterContext *chapter;
100 unsigned int max_distance;
101 unsigned int time_base_count;
102 int64_t last_syncpoint_pos;
104 AVRational *time_base;
105 struct AVTreeNode *syncpoints;
106 #define NUT_BROADCAST 1 // use extended syncpoints
107 #define NUT_PIPE 2 // do not write syncpoints
109 int version; // version currently in use
112 extern const AVCodecTag ff_nut_subtitle_tags[];
113 extern const AVCodecTag ff_nut_video_tags[];
114 extern const AVCodecTag ff_nut_audio_tags[];
115 extern const AVCodecTag ff_nut_data_tags[];
117 extern const AVCodecTag * const ff_nut_codec_tags[];
119 typedef struct Dispositions {
124 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
125 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
126 int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b);
127 int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b);
128 int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
129 void ff_nut_free_sp(NUTContext *nut);
131 extern const Dispositions ff_nut_dispositions[];
133 extern const AVMetadataConv ff_nut_metadata_conv[];
135 #endif /* AVFORMAT_NUT_H */