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//
// main.c
// NaiveFFT
//
// Created by Jacky Jack on 10/08/2021.
//
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <math.h>
#include <complex.h>
#include <time.h>
#include <stdint.h>
#if __EMSCRIPTEN__
#include <emscripten/emscripten.h>
#endif
#include "fft.h"
//test data array
#define DATA_SIZE (8)
//double data_i[DATA_SIZE] = {0.0f,1.0f,2.0f,3.0f,4.0f,5.0f,6.0f,7.0f};
//double data_q[DATA_SIZE] = {0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f};
double data_i[DATA_SIZE] = {1.0f,1.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f};
double data_q[DATA_SIZE] = {0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f};
int main(int argc, const char * argv[]) {
#if __EMSCRIPTEN__
printf("Wasm NaiveFFT module loaded\n");
#else
int i;
// insert code here...
printf("Hello FFT World!\n");
for (i=0;i<DATA_SIZE;i++) {
printf("%.2f ",data_i[i]);
}
printf("\n");
for (i=0;i<DATA_SIZE;i++) {
printf("%.2f ",data_q[i]);
}
printf("\n");
ffti_shuffle_1(data_i, data_q, DATA_SIZE);
fft_1(data_i, data_q, DATA_SIZE, 0);
//run dft by default
//dft(data_i, data_q, DATA_SIZE,0);
printf("after FFT\n");
for (i=0;i<DATA_SIZE;i++) {
printf("%.2f ",data_i[i]);
}
printf("\n");
for (i=0;i<DATA_SIZE;i++) {
printf("%.2f ",data_q[i]);
}
printf("\n");
//big buffer test
{
time_t timer;
char buffer[32];
struct tm *tm_info;
timer = time(NULL);
tm_info = localtime(&timer);
strftime(buffer, 32, "%H:%M:%S", tm_info);
puts(buffer);
}
//test big big fft
{
double *d_i=malloc(sizeof(double)*4*8192+16);
double *d_q=malloc(sizeof(double)*4*8192+16);
for (i=0;i<4*8192;i++) {
d_i[i] = sin(i*1.0/128);
d_q[i] = 0.0f;
}
dft(d_i, d_q, 4*8192,0);
free(d_i); d_i = NULL;
free(d_q); d_q = NULL;
}
{
time_t timer;
char buffer[32];
struct tm *tm_info;
timer = time(NULL);
tm_info = localtime(&timer);
strftime(buffer, 32, "%H:%M:%S", tm_info);
puts(buffer);
}
#endif
return 0;
}
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