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142 lines
4.6 KiB
C++
142 lines
4.6 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_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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#include <QByteArray>
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#include "simpleserializer.h"
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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_currentPosition = 0;
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}
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~DoubleBufferSimple() {}
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DoubleBufferSimple(const DoubleBufferSimple& other)
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{
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m_size = other.m_size;
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m_data = other.m_data;
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m_currentPosition = 0;
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}
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DoubleBufferSimple& operator=(const DoubleBufferSimple& other)
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{
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if (&other == this) {
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return *this;
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}
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m_size = other.m_size;
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m_data = other.m_data;
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m_currentPosition = 0;
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return *this;
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}
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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_currentPosition = 0;
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}
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void write(const typename std::vector<T>::const_iterator& begin, int length)
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{
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int insize = length > m_size ? m_size : length;
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std::copy(begin, begin + insize, m_data.begin() + m_currentPosition);
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if ((m_currentPosition + insize) > m_size)
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{
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int sizeLeft = m_size - m_currentPosition;
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std::copy(begin, begin + sizeLeft, m_data.begin() + m_currentPosition + m_size);
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std::copy(begin + sizeLeft, begin + insize, m_data.begin());
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m_currentPosition = insize - sizeLeft;
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}
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else
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{
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std::copy(begin, begin + insize, m_data.begin() + m_currentPosition + m_size);
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m_currentPosition += insize;
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}
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}
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typename std::vector<T>::iterator getCurrent() { return m_data.begin() + m_currentPosition + m_size; }
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void getCurrent(typename std::vector<T>::iterator& it) { it = m_data.begin() + m_currentPosition + m_size; }
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typename std::vector<T>::const_iterator begin() const { return m_data.begin(); }
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typename std::vector<T>::iterator begin() { return m_data.begin(); }
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unsigned int absoluteFill() const { return m_currentPosition; }
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void reset() { m_currentPosition = 0; }
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QByteArray serialize() const
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{
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SimpleSerializer s(1);
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QByteArray buf(reinterpret_cast<const char*>(m_data.data()), m_data.size()*sizeof(T));
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s.writeS32(1, m_size);
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s.writeU32(2, m_currentPosition);
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s.writeBlob(3, buf);
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return s.final();
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}
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bool deserialize(const QByteArray& data)
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{
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SimpleDeserializer d(data);
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if(!d.isValid()) {
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return false;
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}
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if (d.getVersion() == 1)
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{
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unsigned int tmpUInt;
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QByteArray buf;
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d.readS32(1, &m_size, m_data.size()/2);
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m_data.resize(2*m_size);
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d.readU32(2, &tmpUInt, 0);
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m_currentPosition = tmpUInt;
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d.readBlob(3, &buf);
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//qDebug("DoubleBufferSimple::deserialize: m_data.size(): %u buf.size(): %d", m_data.size(), buf.size());
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//std::copy(reinterpret_cast<char *>(m_data.data()), buf.data(), buf.data() + buf.size()); // bug
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memcpy(reinterpret_cast<char *>(m_data.data()), buf.data(), buf.size());
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return true;
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}
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else
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{
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return false;
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}
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}
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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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int m_currentPosition;
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};
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#endif /* SDRBASE_UTIL_DOUBLEBUFFER_H_ */
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