1 /************************************************************************** 2 * Parks-McClellan algorithm for FIR filter design (C version) 3 *------------------------------------------------- 4 * Copyright (c) 1995,1998 Jake Janovetz (janovetz@uiuc.edu) 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 16 * You should have received a copy of the GNU Library General Public 17 * License along with this library; if not, write to the Free 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 *************************************************************************/ 21 #ifndef __REMEZ_H__ 22 #define __REMEZ_H__ 23 24 #define BANDPASS 1 25 #define DIFFERENTIATOR 2 26 #define HILBERT 3 27 28 #define NEGATIVE 0 29 #define POSITIVE 1 30 31 #define Pi 3.1415926535897932 32 #define Pi2 6.2831853071795865 33 34 #define GRIDDENSITY 16 35 #define MAXITERATIONS 40 36 37 /* Function prototype for remez() - the only function that should need be 38 * called from external code 39 */ 40 void remez(double h[], int numtaps, 41 int numband, double bands[], double des[], double weight[], 42 int type); 43 44 #endif /* __REMEZ_H__ */ 45 46