3 files changed, 135 insertions, 0 deletions
diff --git a/src/c/signalProcessing/ffilt/ffilt.h b/src/c/signalProcessing/ffilt/ffilt.h
new file mode 100644
index 0000000..9b98f34
--- /dev/null
+++ b/src/c/signalProcessing/ffilt/ffilt.h
@@ -0,0 +1,27 @@
+/* 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
+ */
+
+#ifndef __FFILT_H__
+#define __FFILT_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void gffilts(char* ft,double N,double fc,double fh,double* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __FFILT_H__ */
diff --git a/src/c/signalProcessing/ffilt/gffilts.c b/src/c/signalProcessing/ffilt/gffilts.c
new file mode 100644
index 0000000..538daf3
--- /dev/null
+++ b/src/c/signalProcessing/ffilt/gffilts.c
@@ -0,0 +1,90 @@
+/* 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];
+	}
+}
+/*
+int main()
+{
+	string s;
+	int n;
+	double fl,fh;
+}
+*/
diff --git a/src/c/signalProcessing/ffilt/int_ffilt.h b/src/c/signalProcessing/ffilt/int_ffilt.h
new file mode 100644
index 0000000..83f4482
--- /dev/null
+++ b/src/c/signalProcessing/ffilt/int_ffilt.h
@@ -0,0 +1,18 @@
+/* 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
+ */
+
+#ifndef __INT_FFILT_H__
+#define __INT_FFILT_H__
+
+#define g0d0d0d0ffiltd2(ft,N,fc,fh,oup) gffilts(ft,N,fc,fh,oup)
+
+#endif /* !__INT_FFILT_H__! */