audioinput.h

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// Copyright (C) 2016 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 SDRBASE_AUDIO_AUDIOINPUT_H_
#define SDRBASE_AUDIO_AUDIOINPUT_H_

#include <QMutex>
#include <QIODevice>
#include <QAudioFormat>
#include <list>
#include <vector>
#include "export.h"

class QAudioInput;
class AudioFifo;
class AudioOutputPipe;


class SDRBASE_API AudioInput : public QIODevice {
public:
    AudioInput();
    virtual ~AudioInput();

    bool start(int device, int rate);
    void stop();

    void addFifo(AudioFifo* audioFifo);
    void removeFifo(AudioFifo* audioFifo);
    int getNbFifos() const { return m_audioFifos.size(); }

    uint getRate() const { return m_audioFormat.sampleRate(); }
    void setOnExit(bool onExit) { m_onExit = onExit; }
    void setVolume(float volume) { m_volume = volume; }

private:
    QMutex m_mutex;
    QAudioInput* m_audioInput;
    uint m_audioUsageCount;
    bool m_onExit;
    float m_volume;

    std::list<AudioFifo*> m_audioFifos;
    std::vector<qint32> m_mixBuffer;

    QAudioFormat m_audioFormat;

    //virtual bool open(OpenMode mode);
    virtual qint64 readData(char* data, qint64 maxLen);
    virtual qint64 writeData(const char* data, qint64 len);

    friend class AudioOutputPipe;
};



#endif /* SDRBASE_AUDIO_AUDIOINPUT_H_ */