kopia lustrzana https://github.com/f4exb/sdrangel
86 wiersze
2.6 KiB
C++
86 wiersze
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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// (at your option) any later version. //
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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_DOUBLEBUFFERFIFO_H_
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#define SDRBASE_UTIL_DOUBLEBUFFERFIFO_H_
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template<typename T>
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class DoubleBufferFIFO
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{
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public:
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DoubleBufferFIFO(int size) : m_size(size), m_writeIndex(0), m_currentIndex(0)
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{
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m_data = new T[2*m_size];
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}
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~DoubleBufferFIFO()
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{
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delete[] m_data;
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}
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void resize(int size)
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{
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delete[] m_data;
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m_size = size;
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m_data = new T[2*m_size];
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m_writeIndex = 0;
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m_currentIndex = 0;
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}
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void write(const T& element)
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{
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m_data[m_writeIndex] = element;
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m_data[m_writeIndex+m_size] = element;
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m_currentIndex = m_writeIndex;
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if (m_writeIndex < m_size - 1) {
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m_writeIndex++;
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} else {
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m_writeIndex = 0;
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}
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}
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T& readBack(int delay)
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{
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if (delay > m_size) {
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delay = m_size;
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}
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return m_data[m_currentIndex + m_size - delay];
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}
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void zeroBack(int delay)
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{
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if (delay > m_size) {
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delay = m_size;
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}
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for (int i = 0; i < delay; i++) {
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m_data[m_currentIndex + m_size - i] = 0;
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}
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}
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private:
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int m_size;
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T *m_data;
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int m_writeIndex;
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int m_currentIndex;
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};
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#endif /* SDRBASE_UTIL_DOUBLEBUFFERFIFO_H_ */
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