sdrangel/sdrbase/dsp/basebandsamplesource.h

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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 //
// //
// 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/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef SDRBASE_DSP_BASEBANDSAMPLESOURCE_H_
#define SDRBASE_DSP_BASEBANDSAMPLESOURCE_H_
#include <QObject>
#include "dsp/dsptypes.h"
#include "dsp/samplesourcefifo.h"
#include "export.h"
#include "util/messagequeue.h"
class Message;
class SDRBASE_API BasebandSampleSource : public QObject {
Q_OBJECT
public:
BasebandSampleSource();
virtual ~BasebandSampleSource();
virtual void start() = 0;
virtual void stop() = 0;
virtual void pull(Sample& sample) = 0;
virtual void pullAudio(int nbSamples) { (void) nbSamples; }
/** direct feeding of sample source FIFO */
void feed(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);
}
}
SampleSourceFifo& getSampleSourceFifo() { return m_sampleFifo; }
virtual bool handleMessage(const Message& cmd) = 0; //!< Processing of a message. Returns true if message has actually been processed
MessageQueue *getInputMessageQueue() { return &m_inputMessageQueue; } //!< Get the queue for asynchronous inbound communication
virtual void setMessageQueueToGUI(MessageQueue *queue) { m_guiMessageQueue = queue; }
MessageQueue *getMessageQueueToGUI() { return m_guiMessageQueue; }
void setDeviceSampleSourceFifo(SampleSourceFifo *deviceSampleFifo);
protected:
MessageQueue m_inputMessageQueue; //!< Queue for asynchronous inbound communication
MessageQueue *m_guiMessageQueue; //!< Input message queue to the GUI
SampleSourceFifo m_sampleFifo; //!< Internal FIFO for multi-channel processing
SampleSourceFifo *m_deviceSampleFifo; //!< Reference to the device FIFO for single channel processing
void handleWriteToFifo(SampleSourceFifo *sampleFifo, int nbSamples);
protected slots:
void handleInputMessages();
void handleWriteToFifo(int nbSamples);
void handleWriteToDeviceFifo(int nbSamples);
};
#endif /* SDRBASE_DSP_BASEBANDSAMPLESOURCE_H_ */