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//main.c
#include "fft.h"
#include "fft-org.h"
#include <stdio.h>
#include <math.h>
//defined by Compile Target
//#define M 3
//number of points
#define N (1<<M)
fixed real[N], imag[N];
fixed real_org[N], imag_org[N];
void show_result(fixed* real, fixed* real_org, fixed* imag, fixed* imag_org, int n)
{
int i;
for (i=0; i<n; i++)
{
printf("%d: %d, %d", i, real[i], imag[i]);
if (real[i] != real_org[i] || imag[i] != imag_org[i]) {
printf(" expected (%d, %d)", real_org[i], imag_org[i]);
}
printf("\n");
}
}
int main()
{
int i;
for(i=0; i<N; i++)
{
real[i] = 1000*cos(i*2*3.1415926535/N);
real_org[i] = real[i];
imag[i] = 0;
imag_org[i] = 0;
}
printf("\nInput Data\n");
for (i=0; i<N; i++)
{
printf("%d: %d, %d\n", i, real[i], imag[i]);
}
//FFT
fix_fft(real, imag, M, 0);
fix_fft_org(real_org, imag_org, M, 0);
printf("\nFFT\n");
show_result(real, real_org, imag, imag_org, N);
//IFFT
fix_fft(real, imag, M, 1);
fix_fft_org(real_org, imag_org, M, 1);
printf("\nIFFT\n");
show_result(real, real_org, imag, imag_org, N);
/*for(i=0; i<N; i++)
{
real[i] = 1000*(cos(i*2*3.1415926535/N) + sin(i*2*3.1415926535/N));
real_org[i] = real[i];
imag[i] = 0;
imag_org[i] = 0;
}
//FFT
fix_fft(real, imag, M, 0);
fix_fft_org(real_org, imag_org, M, 0);
printf("\nFFT2\n");
show_result(real, real_org, imag, imag_org, N);
//IFFT
fix_fft(real, imag, M, 1);
fix_fft_org(real_org, imag_org, M, 1);
printf("\nIFFT2\n");
show_result(real, real_org, imag, imag_org, N);*/
return 0;
}