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| author | steve <steve@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2001-12-13 23:33:50 +0000 |
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| committer | steve <steve@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2001-12-13 23:33:50 +0000 |
| commit | 0cdf4524e7798ea9a341d4fa29fbbeea83d02e14 (patch) | |
| tree | 04c99a3981d74a0d85f52bb6dd9c82d7577acfbe /libao2/remez.h | |
| parent | af83c68cb9fc0ea120f48383ac4e12e53383dd92 (diff) | |
| download | mpv-0cdf4524e7798ea9a341d4fa29fbbeea83d02e14.tar.bz2 mpv-0cdf4524e7798ea9a341d4fa29fbbeea83d02e14.tar.xz | |
code by Jake Janovetz to find FIR filter coefficients using the Parks-McClellan algorithm
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3483 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libao2/remez.h')
| -rw-r--r-- | libao2/remez.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/libao2/remez.h b/libao2/remez.h new file mode 100644 index 0000000000..3c51bd46aa --- /dev/null +++ b/libao2/remez.h @@ -0,0 +1,45 @@ +/************************************************************************** + * Parks-McClellan algorithm for FIR filter design (C version) + *------------------------------------------------- + * Copyright (c) 1995,1998 Jake Janovetz (janovetz@uiuc.edu) + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the Free + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + *************************************************************************/ +#ifndef __REMEZ_H__ +#define __REMEZ_H__ + +#define BANDPASS 1 +#define DIFFERENTIATOR 2 +#define HILBERT 3 + +#define NEGATIVE 0 +#define POSITIVE 1 + +#define Pi 3.1415926535897932 +#define Pi2 6.2831853071795865 + +#define GRIDDENSITY 16 +#define MAXITERATIONS 40 + +/* Function prototype for remez() - the only function that should need be + * called from external code + */ +void remez(double h[], int numtaps, + int numband, double bands[], double des[], double weight[], + int type); + +#endif /* __REMEZ_H__ */ + |