mirror of https://github.com/f4exb/sdrangel.git
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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// Copyright (C) 2015-2018 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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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 as 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 V3 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 <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDE_MOVINGAVERAGE_H
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#define INCLUDE_MOVINGAVERAGE_H
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#include <stdint.h>
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#include <vector>
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#include <algorithm>
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template<typename Type> class MovingAverage {
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public:
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MovingAverage(int historySize, Type initial) : m_index(0)
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{
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resize(historySize, initial);
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}
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void resize(int historySize, Type initial)
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{
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m_history.resize(historySize);
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std::fill(m_history.begin(), m_history.end(), initial);
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m_sum = (Type) m_history.size() * initial;
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m_index = 0;
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}
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void feed(Type value)
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{
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Type& oldest = m_history[m_index];
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m_sum += value - oldest;
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oldest = value;
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if (m_index < m_history.size() - 1) {
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m_index++;
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} else {
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m_index = 0;
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}
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}
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void fill(Type value)
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{
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std::fill(m_history.begin(), m_history.end(), value);
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m_sum = (Type) m_history.size() * value;
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}
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Type average() const
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{
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return m_sum / (Type) m_history.size();
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}
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Type sum() const
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{
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return m_sum;
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}
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int historySize() const
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{
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return m_history.size();
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}
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protected:
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std::vector<Type> m_history;
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Type m_sum;
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uint32_t m_index;
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};
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#endif // INCLUDE_MOVINGAVERAGE_H
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