2016-06-20 00:45:24 +02:00
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///////////////////////////////////////////////////////////////////////////////////////
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// SDRdaemon - send I/Q samples read from a SDR device over the network via UDP //
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// with FEC protection. GNUradio interface. //
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// //
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// http://stackoverflow.com/questions/10990618/calculate-rolling-moving-average-in-c //
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// //
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// Copyright (C) 2016 Edouard Griffiths, F4EXB //
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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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// //
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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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2016-07-14 20:31:26 +02:00
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#ifndef _UTIL_MOVINGAVERAGE_H_
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#define _UTIL_MOVINGAVERAGE_H_
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2016-06-20 00:45:24 +02:00
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#include <algorithm>
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template <typename T, typename Total, int N>
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class MovingAverage
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{
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public:
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MovingAverage()
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: m_num_samples(0), m_total(0)
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{ }
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void operator()(T sample)
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{
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if (m_num_samples < N)
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{
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m_samples[m_num_samples++] = sample;
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m_total += sample;
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}
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else
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{
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T& oldest = m_samples[m_num_samples++ % N];
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m_total += sample - oldest;
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oldest = sample;
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}
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}
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operator double() const { return m_num_samples > 0 ? m_total / std::min(m_num_samples, N) : 0.0d; }
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operator float() const { return m_num_samples > 0 ? m_total / std::min(m_num_samples, N) : 0.0f; }
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private:
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T m_samples[N];
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int m_num_samples;
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Total m_total;
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};
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#endif /* GR_SDRDAEMONFEC_LIB_MOVINGAVERAGE_H_ */
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