kopia lustrzana https://github.com/f4exb/sdrangel
73 wiersze
2.5 KiB
C++
73 wiersze
2.5 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/>. //
|
||
|
|
///////////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
#include "samplesourcefifo.h"
|
||
|
|
|
||
|
|
SampleSourceFifo::SampleSourceFifo(uint32_t size, uint32_t samplesChunkSize) :
|
||
|
|
m_size(size),
|
||
|
|
m_samplesChunkSize(samplesChunkSize),
|
||
|
|
m_i(0)
|
||
|
|
{
|
||
|
|
assert(samplesChunkSize < m_size/4);
|
||
|
|
m_data.resize(2*m_size);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
SampleSourceFifo::~SampleSourceFifo()
|
||
|
|
{}
|
||
|
|
|
||
|
|
void SampleSourceFifo::read(SampleVector::iterator& begin, SampleVector::iterator& end)
|
||
|
|
{
|
||
|
|
QMutexLocker mutexLocker(&m_mutex);
|
||
|
|
end = m_data.begin() + m_size + m_i;
|
||
|
|
begin = end - m_samplesChunkSize;
|
||
|
|
emit dataRead();
|
||
|
|
}
|
||
|
|
|
||
|
|
void SampleSourceFifo::getReadIterator(SampleVector::iterator& beginRead)
|
||
|
|
{
|
||
|
|
QMutexLocker mutexLocker(&m_mutex);
|
||
|
|
beginRead = m_data.begin() + m_size + m_i - m_samplesChunkSize;
|
||
|
|
emit dataRead();
|
||
|
|
}
|
||
|
|
|
||
|
|
void SampleSourceFifo::write(const Sample& sample)
|
||
|
|
{
|
||
|
|
m_data[m_i] = sample;
|
||
|
|
m_data[m_i+m_size] = sample;
|
||
|
|
|
||
|
|
{
|
||
|
|
QMutexLocker mutexLocker(&m_mutex);
|
||
|
|
m_i = (m_i+1) % m_size;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void SampleSourceFifo::getWriteIterator(SampleVector::iterator& writeAt)
|
||
|
|
{
|
||
|
|
writeAt = m_data.begin() + m_i;
|
||
|
|
}
|
||
|
|
|
||
|
|
void SampleSourceFifo::bumpIndex()
|
||
|
|
{
|
||
|
|
m_data[m_i+m_size] = m_data[m_i];
|
||
|
|
m_i = (m_i+1) % m_size;
|
||
|
|
|
||
|
|
{
|
||
|
|
QMutexLocker mutexLocker(&m_mutex);
|
||
|
|
m_i = (m_i+1) % m_size;
|
||
|
|
}
|
||
|
|
}
|