fft.h

一个基于QT的电网监控程序

#ifdef __cplusplus
extern "C"{
#endif

#ifndef FFT_H
#define FFT_H

#define PI 3.1415926535897932384626

#ifndef REAL
typedef double Real;
#endif

typedef struct ComplexTag {
  Real R,I;
} Complex;

extern void InitializeFFT(long MaxLength);
extern void RecursiveFFT(Complex * Coef, Complex * FFT, long Length, long Step, long Sign);
extern void FFT(Real * Coef, long Length, Complex * FFT, long NFFT);
extern void EndFFT();

#endif

#ifdef __cplusplus
}
#endif