fft_ifft.h

FFT和IFFT的轉換

#define N_ARRAY	1024
#define PI		3.1416

class CFastFourier
{
public:
	CFastFourier();
	virtual ~CFastFourier();

	void swap(double* a, double* b);
	void bitrp(double* xreal, double* ximag, int n);
	void FFT(double* xreal, double* ximag, int n);
	void IFFT(double* xreal, double* ximag, int n);
	void roundoff(double* zreal, int n);
	void mularray(double* xreal, double* ximag, double* yreal, double* yimag, double* zreal, double* zimag, int n);
	void fft_conv(double* xreal, double* ximag, double* yreal, double* yimag, double* zreal, double* zimag, int n);
};