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/* Copyright (C) 2017 - IIT Bombay - FOSSEE
This file must be used under the terms of the CeCILL.
This source file is licensed as described in the file COPYING, which
you should have received as part of this distribution. The terms
are also available at
http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
Author: Ankit Raj
Organization: FOSSEE, IIT Bombay
Email: toolbox@scilab.in
*/
#include<stdio.h>
#include<math.h>
#include "filt_sinc.h"
void dfilt_sincs(double N,double fc,double* oup)
{
double no2=(N-1)/2;
int ino2=(int)no2;
double wl=fc*2*M_PI;
int sz=N;
double xn[sz];
double i;
int l,m;
for(i=-no2;i<=no2;i++)
{
l=i+no2;
xn[l]=sin(wl*i);
}
double xd[sz];
double j;
printf("\n");
for(j=-no2;j<=no2;j++)
{
m=j+no2;
xd[m]=M_PI*j;
}
if(ino2==no2)
{
xn[(int)no2]=2*fc;
xd[(int)no2]=1;
}
double x[sz];
int k;
for(k=0;k<N;k++)
{
oup[k]=xn[k]/xd[k];
}
}
/*
int main()
{
int n;
double fl;
n=5;
fl=0.2;
filt_sinc(n,fl);
}
*/
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