mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-23 16:38:37 -05:00
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2016 Edouard Griffiths, F4EXB //
|
|
// //
|
|
// 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 //
|
|
// //
|
|
// 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_DOUBLEBUFFER_H_
|
|
#define SDRBASE_UTIL_DOUBLEBUFFER_H_
|
|
|
|
#include <vector>
|
|
#include <algorithm>
|
|
|
|
template<typename T>
|
|
class DoubleBufferSimple
|
|
{
|
|
public:
|
|
DoubleBufferSimple()
|
|
{
|
|
m_size = 0;
|
|
m_current = m_data.end();
|
|
}
|
|
|
|
~DoubleBufferSimple() {}
|
|
|
|
void resize(int size)
|
|
{
|
|
m_size = size;
|
|
m_data.resize(2*size);
|
|
m_current = m_data.begin();
|
|
}
|
|
|
|
void write(const typename std::vector<T>::const_iterator& begin, const typename std::vector<T>::const_iterator& cend)
|
|
{
|
|
typename std::vector<T>::const_iterator end = cend;
|
|
|
|
if ((end - begin) > m_size)
|
|
{
|
|
end = begin + m_size;
|
|
}
|
|
|
|
int insize = end - begin;
|
|
|
|
std::copy(begin, end, m_current);
|
|
|
|
if (((m_current - m_data.begin()) + insize) > m_size)
|
|
{
|
|
int sizeLeft = m_size - (m_current - m_data.begin());
|
|
std::copy(begin, begin + sizeLeft, m_current + m_size);
|
|
std::copy(begin + sizeLeft, end, m_data.begin());
|
|
m_current = m_data.begin() + (insize - sizeLeft);
|
|
}
|
|
else
|
|
{
|
|
std::copy(begin, end, m_current + m_size);
|
|
m_current += insize;
|
|
}
|
|
}
|
|
|
|
typename std::vector<T>::iterator getCurrent() const { return m_current + m_size; }
|
|
unsigned int absoluteFill() const { return m_current - m_data.begin(); }
|
|
void reset() { m_current = m_data.begin(); }
|
|
|
|
private:
|
|
int m_size;
|
|
std::vector<T> m_data;
|
|
typename std::vector<T>::iterator m_current;
|
|
};
|
|
|
|
#endif /* SDRBASE_UTIL_DOUBLEBUFFER_H_ */
|