6acebc34b7402531c91c7f1bc5cc033b0350dc05
[libav.git] / libavformat / nut.h
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 FFMPEG_NUT_H
23 #define FFMPEG_NUT_H
24
25 //#include <limits.h>
26 //#include "libavutil/adler32.h"
27 //#include "libavcodec/mpegaudio.h"
28 #include "avformat.h"
29 #include "riff.h"
30
31 #define MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48))
32 #define STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48))
33 #define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48))
34 #define INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48))
35 #define INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48))
36
37 #define ID_STRING "nut/multimedia container\0"
38
39 #define MAX_DISTANCE (1024*32-1)
40
41 typedef enum{
42 FLAG_KEY = 1, ///<if set, frame is keyframe
43 FLAG_EOR = 2, ///<if set, stream has no relevance on presentation. (EOR)
44 FLAG_CODED_PTS = 8, ///<if set, coded_pts is in the frame header
45 FLAG_STREAM_ID = 16, ///<if set, stream_id is coded in the frame header
46 FLAG_SIZE_MSB = 32, ///<if set, data_size_msb is at frame header, otherwise data_size_msb is 0
47 FLAG_CHECKSUM = 64, ///<if set, the frame header contains a checksum
48 FLAG_RESERVED = 128, ///<if set, reserved_count is coded in the frame header
49 FLAG_HEADER_IDX =1024, ///<If set, header_idx is coded in the frame header.
50 FLAG_MATCH_TIME =2048, ///<If set, match_time_delta is coded in the frame header
51 FLAG_CODED =4096, ///<if set, coded_flags are stored in the frame header
52 FLAG_INVALID =8192, ///<if set, frame_code is invalid
53 }flag_t;
54
55 typedef struct {
56 uint64_t pos;
57 uint64_t back_ptr;
58 // uint64_t global_key_pts;
59 int64_t ts;
60 } syncpoint_t;
61
62 typedef struct {
63 uint16_t flags;
64 uint8_t stream_id;
65 uint16_t size_mul;
66 uint16_t size_lsb;
67 int16_t pts_delta;
68 uint8_t reserved_count;
69 uint8_t header_idx;
70 } FrameCode; // maybe s/FrameCode/framecode_t/ or change all to Java style but do not mix
71
72 typedef struct {
73 int last_flags;
74 int skip_until_key_frame;
75 int64_t last_pts;
76 int time_base_id;
77 AVRational *time_base;
78 int msb_pts_shift;
79 int max_pts_distance;
80 int decode_delay; //FIXME duplicate of has_b_frames
81 } StreamContext;// maybe s/StreamContext/streamcontext_t/
82
83 typedef struct {
84 AVFormatContext *avf;
85 // int written_packet_size;
86 // int64_t packet_start;
87 FrameCode frame_code[256];
88 uint8_t header_len[128];
89 const uint8_t *header[128];
90 uint64_t next_startcode; ///< stores the next startcode if it has already been parsed but the stream is not seekable
91 StreamContext *stream;
92 unsigned int max_distance;
93 unsigned int time_base_count;
94 int64_t last_syncpoint_pos;
95 int header_count;
96 AVRational *time_base;
97 struct AVTreeNode *syncpoints;
98 } NUTContext;
99
100 extern const AVCodecTag ff_nut_subtitle_tags[];
101
102 typedef struct {
103 char str[9];
104 int flag;
105 } Dispositions;
106
107 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
108 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
109 int ff_nut_sp_pos_cmp(syncpoint_t *a, syncpoint_t *b);
110 int ff_nut_sp_pts_cmp(syncpoint_t *a, syncpoint_t *b);
111 void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
112
113 extern const Dispositions ff_nut_dispositions[];
114
115 #endif /* FFMPEG_NUT_H */