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

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#ifndef QAUDIOOUTPUT_H
#define QAUDIOOUTPUT_H

#include <QtCore/qiodevice.h>

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

#include <QtMultimedia/qaudio.h>
#include <QtMultimedia/qaudioformat.h>
#include <QtMultimedia/qaudiodeviceinfo.h>


QT_BEGIN_NAMESPACE



class QAbstractAudioOutput;

class Q_MULTIMEDIA_EXPORT QAudioOutput : public QObject
{
    Q_OBJECT

public:
    explicit QAudioOutput(const QAudioFormat &format = QAudioFormat(), QObject *parent = nullptr);
    explicit QAudioOutput(const QAudioDeviceInfo &audioDeviceInfo, const QAudioFormat &format = QAudioFormat(), QObject *parent = nullptr);
    ~QAudioOutput();

    QAudioFormat format() const;

    void start(QIODevice *device);
    QIODevice* start();

    void stop();
    void reset();
    void suspend();
    void resume();

    void setBufferSize(int bytes);
    int bufferSize() const;

    int bytesFree() const;
    int periodSize() const;

    void setNotifyInterval(int milliSeconds);
    int notifyInterval() const;

    qint64 processedUSecs() const;
    qint64 elapsedUSecs() const;

    QAudio::Error error() const;
    QAudio::State state() const;

    void setVolume(qreal);
    qreal volume() const;

    QString category() const;
    void setCategory(const QString &category);

Q_SIGNALS:
    void stateChanged(QAudio::State state);
    void notify();

private:
    Q_DISABLE_COPY(QAudioOutput)

    QAbstractAudioOutput* d;
};

QT_END_NAMESPACE

#endif // QAUDIOOUTPUT_H