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80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2016 Edouard Griffiths, F4EXB //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef SDRBASE_UTIL_DOUBLEBUFFER_H_
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#define SDRBASE_UTIL_DOUBLEBUFFER_H_
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#include <vector>
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#include <algorithm>
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template<typename T>
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class DoubleBufferSimple
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{
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public:
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DoubleBufferSimple()
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{
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m_size = 0;
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m_current = m_data.end();
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}
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~DoubleBufferSimple() {}
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void resize(int size)
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{
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m_size = size;
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m_data.resize(2*size);
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m_current = m_data.begin();
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}
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void write(const typename std::vector<T>::const_iterator& begin, const typename std::vector<T>::const_iterator& cend)
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{
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typename std::vector<T>::const_iterator end = cend;
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if ((end - begin) > m_size)
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{
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end = begin + m_size;
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}
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int insize = end - begin;
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std::copy(begin, end, m_current);
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if (((m_current - m_data.begin()) + insize) > m_size)
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{
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int sizeLeft = m_size - (m_current - m_data.begin());
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std::copy(begin, begin + sizeLeft, m_current + m_size);
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std::copy(begin + sizeLeft, end, m_data.begin());
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m_current = m_data.begin() + (insize - sizeLeft);
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}
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else
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{
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std::copy(begin, end, m_current + m_size);
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m_current += insize;
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}
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}
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typename std::vector<T>::iterator getCurrent() const { return m_current + m_size; }
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unsigned int absoluteFill() const { return m_current - m_data.begin(); }
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void reset() { m_current = m_data.begin(); }
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private:
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int m_size;
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std::vector<T> m_data;
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typename std::vector<T>::iterator m_current;
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};
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#endif /* SDRBASE_UTIL_DOUBLEBUFFER_H_ */
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