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1 | /* |
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 | #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_MAX_VERSION 4 | |
40 | #define NUT_STABLE_VERSION 3 | |
41 | #define NUT_MIN_VERSION 2 | |
42 | ||
43 | typedef enum{ | |
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 | |
56 | } Flag; | |
57 | ||
58 | typedef struct Syncpoint { | |
59 | uint64_t pos; | |
60 | uint64_t back_ptr; | |
61 | // uint64_t global_key_pts; | |
62 | int64_t ts; | |
63 | } Syncpoint; | |
64 | ||
65 | typedef struct FrameCode { | |
66 | uint16_t flags; | |
67 | uint8_t stream_id; | |
68 | uint16_t size_mul; | |
69 | uint16_t size_lsb; | |
70 | int16_t pts_delta; | |
71 | uint8_t reserved_count; | |
72 | uint8_t header_idx; | |
73 | } FrameCode; | |
74 | ||
75 | typedef struct StreamContext { | |
76 | int last_flags; | |
77 | int skip_until_key_frame; | |
78 | int64_t last_pts; | |
79 | int time_base_id; | |
80 | AVRational *time_base; | |
81 | int msb_pts_shift; | |
82 | int max_pts_distance; | |
83 | int decode_delay; //FIXME duplicate of has_b_frames | |
84 | int64_t *keyframe_pts; | |
85 | } StreamContext; | |
86 | ||
87 | typedef struct ChapterContext { | |
88 | AVRational *time_base; | |
89 | } ChapterContext; | |
90 | ||
91 | typedef struct NUTContext { | |
92 | const AVClass *av_class; | |
93 | AVFormatContext *avf; | |
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 | int header_count; | |
106 | AVRational *time_base; | |
107 | struct AVTreeNode *syncpoints; | |
108 | int sp_count; | |
109 | int write_index; | |
110 | int64_t max_pts; | |
111 | AVRational *max_pts_tb; | |
112 | #define NUT_BROADCAST 1 // use extended syncpoints | |
113 | #define NUT_PIPE 2 // do not write syncpoints | |
114 | int flags; | |
115 | int version; // version currently in use | |
116 | int minor_version; | |
117 | } NUTContext; | |
118 | ||
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[]; | |
124 | ||
125 | extern const AVCodecTag * const ff_nut_codec_tags[]; | |
126 | ||
127 | typedef struct Dispositions { | |
128 | char str[9]; | |
129 | int flag; | |
130 | } Dispositions; | |
131 | ||
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); | |
138 | ||
139 | extern const Dispositions ff_nut_dispositions[]; | |
140 | ||
141 | extern const AVMetadataConv ff_nut_metadata_conv[]; | |
142 | ||
143 | #endif /* AVFORMAT_NUT_H */ |