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https://github.com/mpv-player/mpv
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46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
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/**************************************************************************
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* Parks-McClellan algorithm for FIR filter design (C version)
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*-------------------------------------------------
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* Copyright (c) 1995,1998 Jake Janovetz (janovetz@uiuc.edu)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*************************************************************************/
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#ifndef __REMEZ_H__
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#define __REMEZ_H__
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#define BANDPASS 1
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#define DIFFERENTIATOR 2
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#define HILBERT 3
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#define NEGATIVE 0
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#define POSITIVE 1
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#define Pi 3.1415926535897932
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#define Pi2 6.2831853071795865
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#define GRIDDENSITY 16
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#define MAXITERATIONS 40
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/* Function prototype for remez() - the only function that should need be
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* called from external code
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*/
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void remez(double h[], int numtaps,
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int numband, double bands[], double des[], double weight[],
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int type);
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#endif /* __REMEZ_H__ */
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