www.pudn.com > Delphi_VC_JPEG2000.rar > WAVELET.H

#ifndef _WAVELET_H_INCLUDED 
#define _WAVELET_H_INCLUDED 
 
#include "bit.h" 
 
#ifndef min 
#define min(a, b)  (((a) < (b)) ? (a) : (b)) 
#define max(a, b)  (((a) > (b)) ? (a) : (b)) 
#endif 
 
//定义一个基本的“像素”类型。它的长度不可小于15比特位＋一个符号位 
typedef short int wv_pel; 
 
//最大文件头大小设定为1024 
#define wv_MAX_HEADER_SIZE 1024 
//最多信道数为16 
#define wv_MAX_CHANNELS 16 
 
 
#pragma pack(push, 1) 
 
typedef struct 
{ 
	int		compressed_size; 
	float	abs_mse;	//绝对值均方误差 
	float	rel_mse;	//从上一次量化块中得到  
} t_wv_quantised_block; 
 
typedef struct 
 //一个（编码）块 
{ 
	int		max_value, max_bpp, max_quant; 
	int		size, offset; 
	int		best_bits;		//在本级的最佳比特位 
	float	best_mse;		//本级的最佳均方误差 
	int		best_quant;		//最佳量化值 
	t_wv_quantised_block*	quant; 
} t_wv_cblock; 
 
typedef struct 
{ 
	int		width, owidth; 
	int		height, oheight; 
	int		size; 
	int		max_levels;			//小波系数传输的最大级数 
	wv_pel*	channel; 
	wv_pel*	reordered_channel; // 小波系数以特定次序排列 
	int**	reorder_table;		//用于快速的对块进行排序 
	int		max_bits;			//按比特压缩图像的最大尺寸 
	float	max_mse, final_mse; 
	int		size_min_block;		//最小（起始）块 
	int		num_blocks; 
	t_wv_cblock*	blocks; 
} t_wv_cchannel; 
 
typedef void (*wv_progress_function) (int Current, int End, void* UserData); 
 
typedef struct 
{ 
	int		quant; 
	int		num_bits; 
} t_wv_cblock_settings; 
 
typedef struct 
{ 
	t_wv_cchannel*	cchannel; 
	int		num_bits; 
	int		size_min_block; 
	float	emse; 
	int		num_blocks; 
	t_wv_cblock_settings*	blocks; 
} t_wv_csettings; 
 
typedef struct 
{ 
	int			num_channels; 
	int			width, height;		//存储空间大小（2的n次方） 
	int			owidth, oheight;	//初始的宽与高 
	wv_pel**	channels; 
} t_wv_dchannels; 
 
#pragma pack(pop) 
 
WAVELET_DLL_API int WAVELET_DLL_CC log2i(int max_val); 
WAVELET_DLL_API float WAVELET_DLL_CC mse_to_psnr(const float mse); 
WAVELET_DLL_API float WAVELET_DLL_CC psnr_to_mse(const float psnr); 
WAVELET_DLL_API float WAVELET_DLL_CC wv_calc_psnr(const wv_pel *a, const wv_pel *b, const int width, const int height, const int pitch, float *pmse); 
 
WAVELET_DLL_API t_wv_cchannel* WAVELET_DLL_CC wv_init_channel(const int Width, const int Height, const wv_pel* Channel, 
	const int MaxBits, const int Lossless, int *NumBlocks, int*** ReorderTable, wv_progress_function Progress, void* UserData); 
WAVELET_DLL_API void WAVELET_DLL_CC wv_done_channel(t_wv_cchannel* CC, const int FreeReorderTable); 
 
WAVELET_DLL_API int WAVELET_DLL_CC wv_init_channel_settings(t_wv_cchannel* CC, const int MaxBits, const float MaxMSE, t_wv_csettings** Settings); 
WAVELET_DLL_API void WAVELET_DLL_CC wv_done_channel_settings(t_wv_csettings* Settings); 
 
WAVELET_DLL_API int WAVELET_DLL_CC wv_encode_channels(const int NumChannels, t_wv_csettings** ChannelSettings, t_bit_file* BF); 
 
WAVELET_DLL_API t_wv_dchannels* WAVELET_DLL_CC wv_init_decode_channels(t_bit_file* BF); 
WAVELET_DLL_API void WAVELET_DLL_CC wv_done_decode_channels(t_wv_dchannels* dc); 
 
#endif