fft.h

#ifndef __FFT_H__
#define __FFT_H__
#include "para.h"
#define DXT_FORWARD  0
#define DXT_INVERSE  1

#define SWAP(a,b)  tempr=(a);(a)=(b);(b)=tempr
///////////////////////////////////////////

void conjugate_complex(int N,complexdouble *in,complexdouble *out);
void c_plus(complexdouble a,complexdouble b,complexdouble *c);//
void c_mul(complexdouble a,complexdouble b,complexdouble *c) ;//
void c_mul_conjugate(complexdouble a,complexdouble b,complexdouble *c);
void c_sub(complexdouble a,complexdouble b,complexdouble *c);	//
void c_div(complexdouble a,complexdouble b,complexdouble *c);	//
void fft(int N,int M,complexdouble *in);//
void ifft(int N,int M,complexdouble *in); // 
void c_abs(complexdouble f[],double out[],int n);//
void computereal(complexdouble * in,double *out,int length);
void fft_2D(int mLen,int nLen,int M,int N,complexdouble *A_In,int flag);
////////////////////////////////////////////
#endif