qt-everywhere-src-5.15.1/qtmultimedia/src/multimedia/audio/qaudio.h

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#ifndef QAUDIO_H
#define QAUDIO_H

#include <QtMultimedia/qtmultimediaglobal.h>
#include <QtMultimedia/qmultimedia.h>

#include <QtCore/qmetatype.h>

QT_BEGIN_NAMESPACE

//QTM_SYNC_HEADER_EXPORT QAudio

// Class forward declaration required for QDoc bug
class QString;
namespace QAudio
{
    enum Error { NoError, OpenError, IOError, UnderrunError, FatalError };
    enum State { ActiveState, SuspendedState, StoppedState, IdleState, InterruptedState };
    enum Mode { AudioInput, AudioOutput };

    enum Role {
        UnknownRole,
        MusicRole,
        VideoRole,
        VoiceCommunicationRole,
        AlarmRole,
        NotificationRole,
        RingtoneRole,
        AccessibilityRole,
        SonificationRole,
        GameRole,
        CustomRole
    };

    enum VolumeScale {
        LinearVolumeScale,
        CubicVolumeScale,
        LogarithmicVolumeScale,
        DecibelVolumeScale
    };

    Q_MULTIMEDIA_EXPORT qreal convertVolume(qreal volume, VolumeScale from, VolumeScale to);
}

#ifndef QT_NO_DEBUG_STREAM
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug dbg, QAudio::Error error);
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug dbg, QAudio::State state);
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug dbg, QAudio::Mode mode);
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug dbg, QAudio::Role role);
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug dbg, QAudio::VolumeScale role);
#endif

QT_END_NAMESPACE

Q_DECLARE_METATYPE(QAudio::Error)
Q_DECLARE_METATYPE(QAudio::State)
Q_DECLARE_METATYPE(QAudio::Mode)
Q_DECLARE_METATYPE(QAudio::Role)
Q_DECLARE_METATYPE(QAudio::VolumeScale)

#endif // QAUDIO_H