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sdrangel/sdrbase/util/peakfinder.cpp

61 lines
2.4 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// Copyright (C) 2015-2019, 2022 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
// Copyright (C) 2015 John Greb <hexameron@spam.no> //
// Copyright (C) 2022 Jon Beniston, M7RCE <jon@beniston.com> //
// //
// Find peaks in a series of real values //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// (at your option) any later version. //
// //
// This program 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 General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include <algorithm>
#include "peakfinder.h"
PeakFinder::PeakFinder() :
m_prevValue(0.0),
m_index(0)
{}
PeakFinder::~PeakFinder()
{}
void PeakFinder::init(Real value)
{
m_prevValue = value;
m_peaks.clear();
m_index = 0;
}
void PeakFinder::push(Real value, bool last)
{
Real diff = value - m_prevValue;
if (diff < 0) {
m_peaks.push_back({m_prevValue, m_index});
} else if (last) {
m_peaks.push_back({value, m_index});
}
m_prevValue = value;
m_index++;
}
void PeakFinder::sortPeaks()
{
std::sort(m_peaks.rbegin(), m_peaks.rend()); // descending order of values
}