NotificationAudio.h

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#ifndef NOTIFICATIONAUDIO_H
#define NOTIFICATIONAUDIO_H
 
#include "NotificationSoundOutput.h"
 
#include <QAudioDevice>
#include <QBuffer>
#include <QByteArray>
#include <QHash>
#include <QPair>
#include <QScopedPointer>
 
class SoundOutput;

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

    ~NotificationAudio();
 
  public slots:
    void status(QString message);

    void error(QString message);

    void setDevice(const QAudioDevice &device, unsigned msBuffer = 0);

    void play(const QString &filePath);

    void stop();
 
  private:
    using Entry = QPair<QAudioFormat, QByteArray>;
    using Cache = QHash<QString, Entry>;

    void playEntry(Cache::const_iterator it);

    static QByteArray pcm24le_to_int32le(const QByteArray &in);

    static bool upmixMonoToStereoInPlace(QAudioFormat &fmt, QByteArray &data);
 
    QScopedPointer<NotificationSoundOutput> m_stream; 
    Cache m_cache;                                    
    QAudioDevice m_device;                            
    QBuffer m_buffer;                                 
    unsigned m_msBuffer;                              
};
 
#endif // NOTIFICATIONAUDIO_H