fft.h

用Windows 下实现快速傅立叶变化

#include <windows.h>
#include "resource.h"
#include <math.h>


HPEN hpen_paint,hpen_del;

void CopyAudioData(PBYTE pbAudioBuffer, PFLOAT pfRealBuffer,PFLOAT pfImagBuffer, int iNumBytes); 
void GetResult(PFLOAT pfRealBuffer, PFLOAT pfImagBuffer, PFLOAT pfResBuffer,int iNum);
void FFT(PFLOAT pfReal, PFLOAT pfImag, unsigned int iSamples);
void DrawFFTBuffer(HDC hdc,RECT rect,POINT *apt ,PFLOAT pfPaintBuffer,int iStart,int iOffset,int iMaxArrayVal);