mirror of https://github.com/f4exb/sdrangel.git
89 lines
3.4 KiB
C++
89 lines
3.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2016 F4EXB //
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// written by Edouard Griffiths //
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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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#include "dsp/basebandsamplesource.h"
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#include "util/message.h"
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BasebandSampleSource::BasebandSampleSource() :
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m_guiMessageQueue(0),
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m_sampleFifo(48000), // arbitrary, will be adjusted to match device sink FIFO size
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m_deviceSampleFifo(0)
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{
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connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
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connect(&m_sampleFifo, SIGNAL(dataWrite(int)), this, SLOT(handleWriteToFifo(int)));
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}
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BasebandSampleSource::~BasebandSampleSource()
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{
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}
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void BasebandSampleSource::handleInputMessages()
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{
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Message* message;
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while ((message = m_inputMessageQueue.pop()) != 0)
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{
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if (handleMessage(*message))
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{
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delete message;
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}
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}
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}
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void BasebandSampleSource::handleWriteToFifo(int nbSamples)
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{
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handleWriteToFifo(&m_sampleFifo, nbSamples);
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}
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void BasebandSampleSource::handleWriteToDeviceFifo(int nbSamples)
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{
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handleWriteToFifo(m_deviceSampleFifo, nbSamples);
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}
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void BasebandSampleSource::handleWriteToFifo(SampleSourceFifo *sampleFifo, int nbSamples)
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{
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SampleVector::iterator writeAt;
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sampleFifo->getWriteIterator(writeAt);
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pullAudio(nbSamples); // Pre-fetch input audio samples this is mandatory to keep things running smoothly
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for (int i = 0; i < nbSamples; i++)
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{
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pull((*writeAt));
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sampleFifo->bumpIndex(writeAt);
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}
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}
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void BasebandSampleSource::setDeviceSampleSourceFifo(SampleSourceFifo *deviceSampleFifo)
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{
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if (m_deviceSampleFifo != deviceSampleFifo)
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{
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if (m_deviceSampleFifo) {
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qDebug("BasebandSampleSource::setDeviceSampleSourceFifo: disconnect device FIFO %p", m_deviceSampleFifo);
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disconnect(m_deviceSampleFifo, SIGNAL(dataWrite(int)), this, SLOT(handleWriteToDeviceFifo(int)));
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}
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if (deviceSampleFifo) {
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qDebug("BasebandSampleSource::setDeviceSampleSourceFifo: connect device FIFO %p", deviceSampleFifo);
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connect(deviceSampleFifo, SIGNAL(dataWrite(int)), this, SLOT(handleWriteToDeviceFifo(int)));
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}
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m_deviceSampleFifo = deviceSampleFifo;
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}
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}
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