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sdrangel/sdrbase/util/movingaverage2d.h

124 lines
3.5 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018 F4EXB //
// written by Edouard Griffiths //
// //
// 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 _UTIL_MOVINGAVERAGE2D_H_
#define _UTIL_MOVINGAVERAGE2D_H_
#include <algorithm>
template<typename T>
class MovingAverage2D
{
public:
MovingAverage2D() : m_data(0), m_sum(0), m_dataSize(0), m_sumSize(0), m_width(0), m_depth(0), m_avgIndex(0) {}
~MovingAverage2D()
{
if (m_data) {
delete[] m_data;
}
if (m_sum) {
delete[] m_sum;
}
}
void resize(unsigned int width, unsigned int depth)
{
if (width*depth > m_dataSize)
{
m_dataSize = width*depth;
if (m_data) {
delete[] m_data;
}
m_data = new T[m_dataSize];
}
if (width > m_sumSize)
{
m_sumSize = width;
if (m_sum) {
delete[] m_sum;
}
m_sum = new T[m_sumSize];
}
m_width = width;
m_depth = depth;
std::fill(m_data, m_data+(m_width*m_depth), 0.0);
std::fill(m_sum, m_sum+m_width, 0.0);
m_avgIndex = 0;
}
T storeAndGetAvg(T v, unsigned int index)
{
if (m_depth <= 1)
{
return v;
}
else if (index < m_width)
{
T first = m_data[m_avgIndex*m_width+index];
m_sum[index] += (v - first);
m_data[m_avgIndex*m_width+index] = v;
return m_sum[index] / m_depth;
}
else
{
return 0;
}
}
T storeAndGetSum(T v, unsigned int index)
{
if (m_depth == 1)
{
return v;
}
else if (index < m_width)
{
T first = m_data[m_avgIndex*m_width+index];
m_sum[index] += (v - first);
m_data[m_avgIndex*m_width+index] = v;
return m_sum[index];
}
else
{
return 0;
}
}
void nextAverage() {
m_avgIndex = m_avgIndex == m_depth-1 ? 0 : m_avgIndex+1;
}
private:
T *m_data;
T *m_sum;
unsigned int m_dataSize;
unsigned int m_sumSize;
unsigned int m_width;
unsigned int m_depth;
unsigned int m_avgIndex;
};
#endif