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sdrangel/sdrbase/dsp/basebandsamplesource.cpp

89 lines
3.4 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2016 F4EXB //
// written by Edouard Griffiths //
// //
// 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 //
// (at your option) any later version. //
// //
// 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 "dsp/basebandsamplesource.h"
#include "util/message.h"
BasebandSampleSource::BasebandSampleSource() :
m_guiMessageQueue(0),
m_sampleFifo(48000), // arbitrary, will be adjusted to match device sink FIFO size
m_deviceSampleFifo(0)
{
connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
connect(&m_sampleFifo, SIGNAL(dataWrite(int)), this, SLOT(handleWriteToFifo(int)));
}
BasebandSampleSource::~BasebandSampleSource()
{
}
void BasebandSampleSource::handleInputMessages()
{
Message* message;
while ((message = m_inputMessageQueue.pop()) != 0)
{
if (handleMessage(*message))
{
delete message;
}
}
}
void BasebandSampleSource::handleWriteToFifo(int nbSamples)
{
handleWriteToFifo(&m_sampleFifo, nbSamples);
}
void BasebandSampleSource::handleWriteToDeviceFifo(int nbSamples)
{
handleWriteToFifo(m_deviceSampleFifo, nbSamples);
}
void BasebandSampleSource::handleWriteToFifo(SampleSourceFifo *sampleFifo, int nbSamples)
{
SampleVector::iterator writeAt;
sampleFifo->getWriteIterator(writeAt);
pullAudio(nbSamples); // Pre-fetch input audio samples this is mandatory to keep things running smoothly
for (int i = 0; i < nbSamples; i++)
{
pull((*writeAt));
sampleFifo->bumpIndex(writeAt);
}
}
void BasebandSampleSource::setDeviceSampleSourceFifo(SampleSourceFifo *deviceSampleFifo)
{
if (m_deviceSampleFifo != deviceSampleFifo)
{
if (m_deviceSampleFifo) {
qDebug("BasebandSampleSource::setDeviceSampleSourceFifo: disconnect device FIFO %p", m_deviceSampleFifo);
disconnect(m_deviceSampleFifo, SIGNAL(dataWrite(int)), this, SLOT(handleWriteToDeviceFifo(int)));
}
if (deviceSampleFifo) {
qDebug("BasebandSampleSource::setDeviceSampleSourceFifo: connect device FIFO %p", deviceSampleFifo);
connect(deviceSampleFifo, SIGNAL(dataWrite(int)), this, SLOT(handleWriteToDeviceFifo(int)));
}
m_deviceSampleFifo = deviceSampleFifo;
}
}