perseusthread.h

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// Copyright (C) 2018 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                  //
// (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/>.          //

#ifndef PLUGINS_SAMPLESOURCE_PERSEUS_PERSEUSTHREAD_H_
#define PLUGINS_SAMPLESOURCE_PERSEUS_PERSEUSTHREAD_H_

#include <QThread>
#include <QMutex>
#include <QWaitCondition>
#include "perseus-sdr.h"

#include "dsp/samplesinkfifo.h"
#include "dsp/decimators.h"

#define PERSEUS_NBSAMPLES 2048   // Number of I/Q samples in each callback from Perseus
#define PERSEUS_BLOCKSIZE 6*PERSEUS_NBSAMPLES // Perseus sends 2*3 bytes samples

class PerseusThread : public QThread {
    Q_OBJECT

public:
    PerseusThread(perseus_descr* dev, SampleSinkFifo* sampleFifo, QObject* parent = 0);
    ~PerseusThread();

    void startWork();
    void stopWork();
    void setLog2Decimation(unsigned int log2_decim);

private:
    QMutex m_startWaitMutex;
    QWaitCondition m_startWaiter;
    volatile bool m_running;

    perseus_descr* m_dev;
    qint32 m_buf[2*PERSEUS_NBSAMPLES];
    SampleVector m_convertBuffer;
    SampleSinkFifo* m_sampleFifo;

    unsigned int m_log2Decim;
    static PerseusThread *m_this;

    Decimators<qint32, TripleByteLE<qint32>, SDR_RX_SAMP_SZ, 24> m_decimators32; // for no decimation (accumulator is int32)
    Decimators<qint32, TripleByteLE<qint64>, SDR_RX_SAMP_SZ, 24> m_decimators64; // for actual decimation (accumulator is int64)

    void run();
    void callback(const uint8_t* buf, qint32 len); // inner call back
    static int rx_callback(void *buf, int buf_size, void *extra); // call back from Perseus
};

#endif /* PLUGINS_SAMPLESOURCE_PERSEUS_PERSEUSTHREAD_H_ */