buffers.h

傅立叶变换和小波变换是图像压缩的重要工具。该代大戏是利用小波变换进行图像压缩。

#ifndef BUFFERS_H
#define BUFFERS_H

#include <crblib/inc.h>

//====================================================

typedef struct
{
	int		rowLen,numRows;
	float *	rowMalloc;

	float * rows[16];
	int		rowCenter;

} RowBuffer;

RowBuffer * RowBuffer_Create(int width,int numRows);
void RowBuffer_Init(RowBuffer * tb,int width,int numRows);
void RowBuffer_DeInit(RowBuffer * tb);
void RowBuffer_Destroy(RowBuffer * tb);

float * RowBuffer_Row(RowBuffer * tb, int i);
float * RowBuffer_RawRow(RowBuffer * tb, int i);

void RowBuffer_Clear(RowBuffer * rb,int width);

//====================================================

typedef struct
{
	float	* plane;

	int		width,height,stride; // cur
	int		halfw,halfh;
	float	* untransptr;

} PlaneBuffer;

void PlaneBuffer_Copy(const PlaneBuffer * fm,PlaneBuffer * to);

//====================================================

typedef struct
{
	bool IsPlaneBuffer; //else RowBuffer
	int width,halfh;

	PlaneBuffer PB;
	RowBuffer   RB;

} RowAbstract;

void RowAbstract_Advance(RowAbstract *RA,int count);
float * RowAbstract_Row(RowAbstract *RA,int i);

//====================================================

#endif // BUFFERS_H