mpeg4quant.h

来自「DM642的mpeg4编码」· C头文件 代码 · 共 55 行

#ifndef _MPEG4QUANT_H_
#define _MPEG4QUANT_H_

#    include <stdio.h>
#include "../bitstream/bitstream.c"

/*  mpeg4 quant-matrix intra  */
static const unsigned char mpeg4_intra_matrix[64]  =
{
	8, 17, 18, 19, 21, 23, 25, 27,
	17, 18, 19, 21, 23, 25, 27, 28,
	20, 21, 22, 23, 24, 26, 28, 30,
	21, 22, 23, 24, 26, 28, 30, 32, 
	22, 23, 24, 26, 28, 30, 32, 35, 
	23, 24, 26, 28, 30, 32, 35, 38, 
	25, 26, 28, 30, 32, 35, 38, 41, 
	27, 28, 30, 32, 35, 38, 41, 45
};

static const unsigned char mpeg4_inter_matrix[64] =
{
	16, 17, 18, 19, 20, 21, 22, 23, 
	17, 18, 19, 20, 21, 22, 23, 24, 
	18, 19, 20, 21, 22, 23, 24, 25, 
	19, 20, 21, 22, 23, 24, 26, 27, 
	20, 21, 22, 23, 25, 26, 27, 28, 
	21, 22, 23, 24, 26, 27, 28, 30,
	22, 23, 24, 26, 27, 28, 30, 31, 
	23, 24, 25, 27, 28, 30, 31, 33
};

void LoadMpeg4IntraMatrix(Stream*, const unsigned char*);
void LoadMpeg4InterMatrix(Stream*, const unsigned char*);

int IsCustomIntraMatrix(const short*);
int IsCustomInterMatrix(const short*);

short Mpeg4IntraQuant1(short* Dst, const short* Src, short iQuant, short iScalar, short iFlag);
short Mpeg4IntraQuant2(short* Dst, const short* Src, short iQuant, short iScalar);

short Mpeg4InterQuant1(short* Dst, const short* Src, short iQuant, short iFlag);
short Mpeg4InterQuant2(short* Dst, const short* Src, short iQuant);

short Mpeg4IntraDeQuant1(short* Dst, const short* Src, short iQuant, short iScalar, short iFlag);
short Mpeg4InterDeQuant1(short* Dst, const short* Src, short iQuant, short iFlag);

short Mpeg4IntraDeQuant2(short* Dst, const short* Src, short iQuant, short iScalar);
short Mpeg4InterDeQuant2(short* Dst, const short* Src, short iQuant);


#endif