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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"
#include "ffilt.h"
void gffilts(char* ft,int size,double N,double fc,double fh,double* oup)
{
int sz=N;
double X[sz];
double no22=(N-1)/2;
int ino22=(int)no22;
if(ft[0]=='l')
{
dfilt_sincs(N,fc,X);
int k=0;
for(k=0;k<sz;k++)
{
oup[k]=X[k];
}
}
else if(ft[0]=='h')
{
int k=0;
dfilt_sincs(N,fc,X);
for(k=0;k<sz;k++)
{
oup[k]=-1*X[k];
}
int id=no22;
oup[id]=1+oup[id];
}
else if(ft[0]=='b')
{
double wc=M_PI*(fh+fc);
fc=(fh-fc)/2;
dfilt_sincs(N,fc,X);
double Y[sz];
double k=0;
for(k=-no22;k<=no22;k++)
{
int ind;
ind=k+no22;
Y[ind]=2*cos(wc*k);
}
int j=0;
for(j=0;j<sz;j++)
{
oup[j]=X[j]*Y[j];
}
}
else if(ft[0]=='s')
{
double wc=M_PI*(fh+fc);
fc=(fh-fc)/2;
dfilt_sincs(N,fc,X);
double Y[sz];
double k=0;
for(k=-no22;k<=no22;k++)
{
int ind;
ind=k+no22;
Y[ind]=2*cos(wc*k);
}
int j=0;
for(j=0;j<sz;j++)
{
oup[j]=-1*X[j]*Y[j];
}
int id=no22;
oup[id]=1+oup[id];
}
}
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