// FFT.h: interface for the CFFT class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_FFT_H__DD76BAB3_D55E_11D3_BFCD_00A00C3FB20E__INCLUDED_)
#define AFX_FFT_H__DD76BAB3_D55E_11D3_BFCD_00A00C3FB20E__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
class AFX_EXT_CLASS CFilter
{
	double xbegin,xend;
public:
	CFilter();
	CFilter(double x1,double x2);
	void set(double x1,double x2);

	double bartly(double x);
	double hann(double x);
	double welch(double x);
	double window(double x);

	void draw();
};

class AFX_EXT_CLASS CFFT  
{
public:
	CFFT();
	virtual ~CFFT();

	double *pr,*pi,*fr,*fi;
	int m_pow,num;
	double T;

	void FilterLog();
	void UnTransform();
	void Filter(CFFT &t);
	void Write(char *m_output,double dt,int state=1, const char *mode="wt");
	void ToDrawing(char *name,double w1,double w2, const char *mode="wt");
	void Transform(double *y,int n);
	int Create(double *m_pr,double *m_pi,int num);
	void Wavelet(double* y, int n);
	void UnWavelet(void);

	int GetPow(int num);
	void kcfwt(double* p, int n, int k, double* x);
	void kbfft(double* pr,double *pi,int n,int k,double* fr,double* fi,int l,int il);
	void Walsh(double *p,int n,double *x);
	void Walsh(double **a,int m,int n,int IsInverse);
	void FFT2D(double **ar,double **ai,int m,int n,int IsInverse);
};

#endif // !defined(AFX_FFT_H__DD76BAB3_D55E_11D3_BFCD_00A00C3FB20E__INCLUDED_)