77 lines
1.5 KiB
C++
77 lines
1.5 KiB
C++
/*
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* This file is part of the "bluetoothheater" distribution
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* (https://gitlab.com/mrjones.id.au/bluetoothheater)
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*
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* Copyright (C) 2018 Ray Jones <ray@mrjones.id.au>
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*
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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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*
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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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*
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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 <https://www.gnu.org/licenses/>.
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*
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*/
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#include "DataFilter.h"
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#include <math.h>
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CExpMean::CExpMean()
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{
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reset(0);
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setAlpha(0.95);
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setRounding(0.1);
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}
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void
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CExpMean::reset(float val)
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{
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_bFresh = true;
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_val = val;
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}
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void
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CExpMean::update(float val)
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{
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if(_bFresh) {
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_val = val;
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_bFresh = false;
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}
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_val = _val * _Alpha + val * (1-_Alpha);
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}
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float
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CExpMean::getValueRaw() const
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{
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return _val;
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}
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float
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CExpMean::getValue() const
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{
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int round = int(_val * _roundingRecip + 0.5);
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return float(round) * _rounding;
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}
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void
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CExpMean::setRounding(float val)
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{
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if(val > 0) {
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_rounding = val;
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_roundingRecip = 1.0 / val; // divides are expensive, prep!
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}
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}
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void
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CExpMean::setAlpha(float val)
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{
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_Alpha = val;
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}
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