SoundOutput.h

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#ifndef SOUNDOUT_H__
#define SOUNDOUT_H__
 
#include <QAudioDevice>
#include <QAudioFormat>
#include <QAudioSink>
#include <QObject>
#include <QString>

class SoundOutput : public QObject {
    Q_OBJECT;
 
  public:
    SoundOutput() = default;

    qreal attenuation() const;

    QAudioFormat format() const;
 
  public Q_SLOTS:
    void setFormat(QAudioDevice const &device, unsigned channels,
                   unsigned msBuffered = 0u);

    void setDeviceFormat(QAudioDevice const &device, QAudioFormat const &format,
                         unsigned msBuffered = 0u);

    void restart(QIODevice *source);

    void suspend();

    void resume();

    void reset();

    void stop();

    void setAttenuation(qreal value);

    void resetAttenuation();
 
  Q_SIGNALS:
    void error(QString message) const;

    void status(QString message) const;
 
  private:
    bool checkStream() const;
 
  private Q_SLOTS:
    void handleStateChanged(QAudio::State state) const;
 
  private:
    QAudioDevice m_device;                   
    QScopedPointer<QAudioSink> m_stream;    
    QAudioFormat m_format;                  
    unsigned m_msBuffered = 0u;             
    qreal m_volume = 1.0;                   
    bool m_error = false;                   
};
 
#endif