jpegdoc.h

图象压缩算法的实现,十分具有参考价值的,赫赫有名

// JPEGDoc.h : interface of the CJPEGDoc class
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_JPEGDOC_H__C06737A2_5ED6_44E5_A96D_BA6F4D43A51C__INCLUDED_)
#define AFX_JPEGDOC_H__C06737A2_5ED6_44E5_A96D_BA6F4D43A51C__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CDib
{
protected:
	CPalette m_Palette;
	unsigned char *m_pDibBits;
	DWORD m_dwDibSize;

	BITMAPFILEHEADER *m_pBFH;		//位图文件头
	RGBQUAD *m_pPalette;
	int m_nPaletteEntries;
	struct RGBData
	{
		unsigned char Blue;
		unsigned char Green;
		unsigned char Red;
	};
	RGBData *data[1600];			//存储彩色图像的RGB三色
	unsigned char *hdata[1600];		//数据类型一定不能错
	typedef struct
	{ 
		double re;
		double im;
	}COMPLEX;						//复数运算的结构体
	typedef struct {
		int zero_num;
		int digit;
	}C_RLE;							//记录游程的长度和数据的结构体

public:	
	BITMAPINFOHEADER *m_pBIH;		//位图信息头
	LONG width,height;				//图像的宽度和高度
	LONG BmpFileLength;
	C_RLE RLE[64];					//记录8＊8的游程数据
	int table[64];					//记录8＊8的数据块经量化和Z型扫描结果
	unsigned char *m_pDib;			//
	CFile file;						//写JPEG文件的文件指针
	int EncodeJpeg;					//32位的数据缓冲区，用于把不等长的码串串成4个字节以便写入JPEG文件
	int surplus;					//32位数据缓冲区中剩余没使用的位长，使用数据缓冲区从高位到低位
public:
	CDib();
	~CDib();
	BOOL Load(const char *);
	BOOL Save(const char *);
	BOOL SaveJpeg(const char *pszFilename);
	BOOL Draw(CDC *,int nX=0,int nY=0);
	BOOL SetPalette(CDC *);
	
//	void FFT(COMPLEX * TD,COMPLEX * FD,int r);
	void Show(CDC *pDC,int nX,int nY);
	void Pre_DCT(double * sourcedata);
	BOOL m_bit24;
	BOOL DCT(double *x,int n,unsigned char *QuantTable);
	int  RLEProg();
	BOOL WriteHuffmanData();
	BOOL HuffmanTable(unsigned char *bit,unsigned char *val);
	void Write32bit();
	void ShiftWrite(int ac_huffmanbitnum,int ac_huffmancode);
	BOOL WriteSurplus();
	int  WriteData(int preDC,int *DChufco,int *DChufsi,int *AChufco,int *AChufsi);
//	BOOL DIBDct(LONG lWidth,LONG lHeight);
//	BOOL Edge_Laplace(int ival);
//	void Edge_Sobel();
//	BOOL Add();
	BOOL ShangInvert();
	BOOL ZheInvert();
};


class CJPEGDoc : public CDocument
{
protected: // create from serialization only
	CJPEGDoc();
	DECLARE_DYNCREATE(CJPEGDoc)

// Attributes
public:

// Operations
public:

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CJPEGDoc)
	public:
	virtual BOOL OnNewDocument();
	virtual void Serialize(CArchive& ar);
	//}}AFX_VIRTUAL

// Implementation
public:
	virtual ~CJPEGDoc();
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif

protected:

// Generated message map functions
protected:
	//{{AFX_MSG(CJPEGDoc)
		// NOTE - the ClassWizard will add and remove member functions here.
		//    DO NOT EDIT what you see in these blocks of generated code !
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_JPEGDOC_H__C06737A2_5ED6_44E5_A96D_BA6F4D43A51C__INCLUDED_)