audiofifo.h

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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel                                                   //
//                                                                               //
// 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_AUDIOFIFO_H
#define INCLUDE_AUDIOFIFO_H

#include <QObject>
#include <QMutex>
#include <QWaitCondition>

#include "dsp/dsptypes.h"
#include "export.h"

class SDRBASE_API AudioFifo : public QObject {
    Q_OBJECT
public:
    AudioFifo();
    AudioFifo(uint32_t numSamples);
    ~AudioFifo();

    bool setSize(uint32_t numSamples);

    uint32_t write(const quint8* data, uint32_t numSamples);
    uint32_t read(quint8* data, uint32_t numSamples);

    uint32_t drain(uint32_t numSamples);
    void clear();

    inline uint32_t flush() { return drain(m_fill); }
    inline uint32_t fill() const { return m_fill; }
    inline bool isEmpty() const { return m_fill == 0; }
    inline bool isFull() const { return m_fill == m_size; }
    inline uint32_t size() const { return m_size; }

private:
    QMutex m_mutex;

    qint8* m_fifo;

    const uint32_t m_sampleSize;

    uint32_t m_size;
    uint32_t m_fill;
    uint32_t m_head;
    uint32_t m_tail;

    bool create(uint32_t numSamples);
};

#endif // INCLUDE_AUDIOFIFO_H