add multiple inclusion guards to headers
[libav.git] / libavformat / nut.h
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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
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23#ifndef AVFORMAT_NUT_H
24#define AVFORMAT_NUT_H
25
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26//#include <limits.h>
27#include "avformat.h"
28#include "crc.h"
29//#include "mpegaudio.h"
30#include "riff.h"
31//#include "adler32.h"
32
33#define MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48))
34#define STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48))
35#define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48))
36#define INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48))
37#define INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48))
38
39#define ID_STRING "nut/multimedia container\0"
40
41#define MAX_DISTANCE (1024*32-1)
42
43typedef 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 then the frame header contains a checksum
50 FLAG_RESERVED = 128, ///<if set, reserved_count 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
55typedef struct {
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56 uint64_t pos;
57 uint64_t back_ptr;
58// uint64_t global_key_pts;
59 int64_t ts;
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60} syncpoint_t;
61
62typedef 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;
755bfeab 69} FrameCode; // maybe s/FrameCode/framecode_t/ or change all to Java style but do not mix
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70
71typedef struct {
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72 int last_flags;
73 int skip_until_key_frame;
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74 int64_t last_pts;
75 int time_base_id;
76 AVRational time_base;
77 int msb_pts_shift;
78 int max_pts_distance;
79 int decode_delay; //FIXME duplicate of has_b_frames
80} StreamContext;// maybe s/StreamContext/streamcontext_t/
81
82typedef struct {
83 AVFormatContext *avf;
84// int written_packet_size;
85// int64_t packet_start[3]; //0-> startcode less, 1-> short startcode 2-> long startcodes
86 FrameCode frame_code[256];
755bfeab 87 uint64_t next_startcode; ///< stores the next startcode if it has already been parsed but the stream is not seekable
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88 StreamContext *stream;
89 unsigned int max_distance;
90 unsigned int time_base_count;
91 int64_t last_syncpoint_pos;
92 AVRational *time_base;
4d5be986 93 struct AVTreeNode *syncpoints;
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94} NUTContext;
95
96
97//FIXME move to a common spot, like crc.c/h
98static unsigned long av_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf, unsigned int len){
99 return av_crc(av_crc04C11DB7, checksum, buf, len);
100}
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101
102#endif