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sdrangel/sdrbase/util/max2d.h

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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018-2019 Edouard Griffiths, F4EXB <f4exb06@gmail.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 SDRBASE_UTIL_MAX2D_H_
#define SDRBASE_UTIL_MAX2D_H_
#include <algorithm>
template<typename T>
class Max2D
{
public:
Max2D() : m_max(0), m_maxSize(0), m_width(0), m_size(0), m_maxIndex(0) {}
~Max2D()
{
if (m_max) {
delete[] m_max;
}
}
void resize(unsigned int width, unsigned int size)
{
if (width > m_maxSize)
{
m_maxSize = width;
if (m_max) {
delete[] m_max;
}
m_max = new T[m_maxSize];
}
m_width = width;
m_size = size;
std::fill(m_max, m_max+m_width, 0);
m_maxIndex = 0;
}
bool storeAndGetMax(T& max, T v, unsigned int index)
{
if (m_size <= 1)
{
max = v;
return true;
}
if (m_maxIndex == 0)
{
m_max[index] = v;
return false;
}
else if (m_maxIndex == m_size - 1)
{
m_max[index] = std::max(m_max[index], v);
max = m_max[index];
return true;
}
else
{
m_max[index] = std::max(m_max[index], v);
return false;
}
}
bool nextMax()
{
if (m_size <= 1) {
return true;
}
if (m_maxIndex == m_size - 1)
{
m_maxIndex = 0;
std::fill(m_max, m_max+m_width, 0);
return true;
}
else
{
m_maxIndex++;
return false;
}
}
private:
T *m_max;
unsigned int m_maxSize;
unsigned int m_width;
unsigned int m_size;
unsigned int m_maxIndex;
};
#endif /* SDRBASE_UTIL_MAX2D_H_ */