NotificationSoundOutput.h

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#pragma once
 
#include <QAudioDevice>
#include <QAudioFormat>
#include <QAudioSink>
#include <QBuffer>
#include <QObject>
#include <qmath.h>
 
#include <memory>

class NotificationSoundOutput : public QObject
{
    Q_OBJECT
 
public:
    explicit NotificationSoundOutput(QObject *parent = nullptr);

    ~NotificationSoundOutput() override;

    void setDevice(QAudioDevice const &device, unsigned msBuffer);

    void setAttenuation(qreal a);

    void play(QByteArray const &data, QAudioFormat const &format);

    void stop();
 
signals:
    void status(QString message);

    void error(QString message);
 
private slots:
    void handleStateChanged(QAudio::State newState);
 
private:
    void release();
 
    QAudioDevice                  m_device;                 
    std::unique_ptr<QAudioSink>   m_sink;                   
    std::unique_ptr<QBuffer>      m_buffer;                 
    QAudioFormat                  m_currentFormat;          
    qreal                         m_volume  = 1.0;         
    unsigned                      m_msBuffer = 0;          
};