hackrfoutputthread.h

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// Copyright (C) 2017 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 INCLUDE_HACKRFOUTPUTTHREAD_H
#define INCLUDE_HACKRFOUTPUTTHREAD_H

#include <QThread>
#include <QMutex>
#include <QWaitCondition>
#include <libhackrf/hackrf.h>

#include "dsp/samplesourcefifo.h"
#include "dsp/interpolators.h"

#define HACKRF_BLOCKSIZE (1<<17)

class HackRFOutputThread : public QThread {
    Q_OBJECT

public:
    HackRFOutputThread(hackrf_device* dev, SampleSourceFifo* sampleFifo, QObject* parent = NULL);
    ~HackRFOutputThread();

    void startWork();
    void stopWork();
    void setLog2Interpolation(unsigned int log2_interp);
    void setFcPos(int fcPos);

private:
    QMutex m_startWaitMutex;
    QWaitCondition m_startWaiter;
    bool m_running;

    hackrf_device* m_dev;
    qint8 m_buf[2*HACKRF_BLOCKSIZE];
    SampleSourceFifo* m_sampleFifo;

    unsigned int m_log2Interp;
    int m_fcPos;

    Interpolators<qint8, SDR_TX_SAMP_SZ, 8> m_interpolators;

    void run();
    void callback(qint8* buf, qint32 len);
    static int tx_callback(hackrf_transfer* transfer);
};

#endif // INCLUDE_HACKRFOUTPUTTHREAD_H