bitstream.h

AVS视频编解码器 能实现视频图像的高效率压缩 能在ＶＣ上高速运行

/*
***********************************************************************
* COPYRIGHT AND WARRANTY INFORMATION
*
* Copyright 2003, Advanced Audio Video Coding Standard, Part II
*
* DISCLAIMER OF WARRANTY
*
* These software programs are available to the users without any
* license fee or royalty on an "as is" basis. The AVS disclaims
* any and all warranties, whether express, implied, or statutory,
* including any implied warranties of merchantability or of fitness
* for a particular purpose. In no event shall the contributors or 
* the AVS be liable for any incidental, punitive, or consequential
* damages of any kind whatsoever arising from the use of this program.
*
* This disclaimer of warranty extends to the user of this program
* and user's customers, employees, agents, transferees, successors,
* and assigns.
*
* The AVS does not represent or warrant that the program furnished
* hereunder are free of infringement of any third-party patents.
* Commercial implementations of AVS, including shareware, may be
* subject to royalty fees to patent holders. Information regarding
* the AVS patent policy is available from the AVS Web site at
* http://www.avs.org.cn
*
* THIS IS NOT A GRANT OF PATENT RIGHTS - SEE THE AVS PATENT POLICY.
************************************************************************
*/

/*
*************************************************************************************
* File name: 
* Function: 
*
*************************************************************************************
*/

#ifndef _BIT_STREAM_H
#define _BIT_STREAM_H

#include <stdio.h>

#define SVA_START_CODE_EMULATION

#ifdef SVA_START_CODE_EMULATION

#define SVA_STREAM_BUF_SIZE 1024 //must large than 3
typedef struct {
	FILE *f;
	unsigned char	buf[SVA_STREAM_BUF_SIZE];  //流缓冲区
	unsigned int	uPreBytes;//最近写入的3个字节，初始值是0xFFFFFFFF
	int	iBytePosition;		//当前字节位置
	int	iBitOffset;			//当前位偏移，0表示最高位
	int	iNumOfStuffBits;	//已插入的填充位的个数，遇到开始码时置0
	int iBitsCount;			//码流总位数
} OutputStream;
int write_start_code(OutputStream *p,unsigned char code);
extern OutputStream *pORABS;
#endif

void CloseBitStreamFile();
void OpenBitStreamFile(char *Filename);
int  WriteSequenceHeader();
int  WriteSequenceDisplayExtension();
int  WriteUserData(char *userdata);
int  WriteSequenceEnd();
void WriteBitstreamtoFile();
int WriteCopyrightExtension();
int WriteCameraParametersExtension();
int WriteSliceHeader(int slice_nr, int slice_qp);
#endif