kopia lustrzana https://github.com/f4exb/sdrangel
99 wiersze
3.1 KiB
C++
99 wiersze
3.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2023 Jon Beniston, M7RCE <jon@beniston.com> //
|
|
// //
|
|
// 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/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef INCLUDE_UTIL_MOVINGMAXIMUM_H
|
|
#define INCLUDE_UTIL_MOVINGMAXIMUM_H
|
|
|
|
#include <algorithm>
|
|
#include <QDebug>
|
|
|
|
// Calculates moving maximum over a number of samples
|
|
template <typename T>
|
|
class MovingMaximum
|
|
{
|
|
public:
|
|
|
|
MovingMaximum() :
|
|
m_samples(nullptr),
|
|
m_size(0)
|
|
{
|
|
reset();
|
|
}
|
|
|
|
~MovingMaximum()
|
|
{
|
|
delete[] m_samples;
|
|
}
|
|
|
|
void reset()
|
|
{
|
|
m_count = 0;
|
|
m_index = 0;
|
|
m_max = NAN;
|
|
}
|
|
|
|
void setSize(int size)
|
|
{
|
|
delete[] m_samples;
|
|
m_samples = new T[size]();
|
|
m_size = size;
|
|
reset();
|
|
}
|
|
|
|
void operator()(T sample)
|
|
{
|
|
if (m_count < m_size)
|
|
{
|
|
m_samples[m_count++] = sample;
|
|
if (m_count == 1) {
|
|
m_max = sample;
|
|
} else {
|
|
m_max = std::max(m_max, sample);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
T oldest = m_samples[m_index];
|
|
m_samples[m_index] = sample;
|
|
m_index = (m_index + 1) % m_size;
|
|
m_max = std::max(m_max, sample);
|
|
if (oldest >= m_max)
|
|
{
|
|
// Find new maximum, that will be lower than the oldest sample
|
|
m_max = m_samples[0];
|
|
for (unsigned int i = 1; i < m_size; i++) {
|
|
m_max = std::max(m_max, m_samples[i]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
T getMaximum() const {
|
|
return m_max;
|
|
}
|
|
|
|
private:
|
|
T *m_samples;
|
|
unsigned int m_size; // Max number of samples
|
|
unsigned int m_count; // Number of samples used
|
|
unsigned int m_index; // Current index
|
|
T m_max;
|
|
};
|
|
|
|
#endif /* INCLUDE_UTIL_MOVINGMAXIMUM_H */
|
|
|