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diff --git a/src/c/signalProcessing/includes/dct.h b/src/c/signalProcessing/includes/dct.h
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+/* Copyright (C) 2016 - 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: Ukasha Noor
+ Organization: FOSSEE, IIT Bombay
+ Email: toolbox@scilab.in
+*/
+
+
+#ifndef __DCT_H__
+#define __DCT_H__
+
+#include <math.h>
+#include "types.h"
+#include "doubleComplex.h"
+#include "addition.h"
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+void ddcta(double *in,int row,int col,int sign,double *out);
+
+void zdcta(doubleComplex *in,int row,int col,int sign,doubleComplex *out);
+
+void cdcta(floatComplex *in,int row,int col,int sign,floatComplex *out);
+
+#ifdef  __cplusplus
+} /* extern "C" */
+#endif
+
+#endif