qt-everywhere-src-5.15.1/qtmultimedia/src/multimedia/controls/qmediagaplessplaybackcontrol.h

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#ifndef QMEDIAGAPLESSPLAYBACKCONTROL_H
#define QMEDIAGAPLESSPLAYBACKCONTROL_H

#include <QtMultimedia/qmediacontrol.h>
#include <QtMultimedia/qmediacontent.h>

QT_BEGIN_NAMESPACE

// Required for QDoc workaround
class QString;

class Q_MULTIMEDIA_EXPORT QMediaGaplessPlaybackControl : public QMediaControl
{
    Q_OBJECT
public:
    virtual ~QMediaGaplessPlaybackControl();

    virtual QMediaContent nextMedia() const = 0;
    virtual void setNextMedia(const QMediaContent &media) = 0;

    virtual bool isCrossfadeSupported() const = 0;
    virtual qreal crossfadeTime() const = 0;
    virtual void setCrossfadeTime(qreal crossfadeTime) = 0;

Q_SIGNALS:
    void crossfadeTimeChanged(qreal crossfadeTime);
    void nextMediaChanged(const QMediaContent& media);
    void advancedToNextMedia();

protected:
    explicit QMediaGaplessPlaybackControl(QObject *parent = nullptr);
};

#define QMediaGaplessPlaybackControl_iid "org.qt-project.qt.mediagaplessplaybackcontrol/5.0"
Q_MEDIA_DECLARE_CONTROL(QMediaGaplessPlaybackControl, QMediaGaplessPlaybackControl_iid)

QT_END_NAMESPACE

#endif // QMEDIAGAPLESSPLAYBACKCONTROL_H