main.cpp
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#include <iostream>
#include "wavdata.h"
#include "fft.h"
#include <math.h>
#define DELAY 5000
#define AMPLITUDE 0.5
int main(int argc, char **argv)
{
WavData w;
w.load("COW.WAV");
char *data = w.data();
char *data2 = new char[w.datasize()*2];
int i;
for(i=0;i<w.datasize();i++){
data2[i]=data[i];
printf("%d ",data[i]);}
for(;i<w.datasize()*2;i++)
data2[i]=128;
for(int i=DELAY;i<2*w.datasize();i++)
{
float value = (float)(unsigned char)data2[i-DELAY]-128.0;
value = value * AMPLITUDE;
int val = (unsigned int)value + (unsigned char)data2[i];
if(val>255)val=255;
if(val<0)val=0;
data2[i]= (unsigned char)(unsigned int)val;
}
w.clearData();
w.setDatasize(w.datasize()*2);
w.setData(data2);
w.save("COW_d.WAV");
}