52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
/*
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epple2
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Copyright (C) 2008 by Christopher A. Mosher <cmosher01@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LOWPASS_1_5_MHZ_H
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#define LOWPASS_1_5_MHZ_H
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/*
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Generated by the utility at http://www-users.cs.york.ac.uk/~fisher/mkfilter
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then hand modified by Chris Mosher.
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*/
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class Lowpass_1_5_MHz
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{
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public:
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Lowpass_1_5_MHz()
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{
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x[0] = x[1] = x[2] = 0;
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y[0] = y[1] = y[2] = y[3] = y[4] = 0;
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}
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~Lowpass_1_5_MHz() { }
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int x[3];
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int y[5];
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int next(const int v)
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{
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x[0] = x[1]; x[1] = x[2];
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x[2] = v >> 3;
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y[0] = y[1]; y[1] = y[2]; y[2] = y[3]; y[3] = y[4];
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y[4] = x[0]+x[2]+(y[1]>>2)-y[2]+y[3]+(y[3]>>1);
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return y[4];
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}
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};
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#endif
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