/*  This file is part of the KDE project.
 *
 *    Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 *    Copyright (C) 2013 Martin Sandsmark <martin.sandsmark@kde.org>
 *
 *    This library is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU Lesser General Public License as published by
 *    the Free Software Foundation, either version 2.1 or 3 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public License
 *    along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef PHONON_VLC_VOLUMEFADEREFFECT_H
#define PHONON_VLC_VOLUMEFADEREFFECT_H

#include <phonon/volumefaderinterface.h>

#include <QtCore/QTime>
#include <QtCore/QPointer>

#include "sinknode.h"

class QTimeLine;

namespace Phonon {

class MediaObject;

namespace VLC {

class VolumeFaderEffect : public QObject, public SinkNode, public VolumeFaderInterface
{
    Q_OBJECT
    Q_INTERFACES(Phonon::VolumeFaderInterface)

public:
    explicit VolumeFaderEffect(QObject *parent = nullptr);
    ~VolumeFaderEffect() override;

    // VolumeFaderInterface:
    float volume() const override;
    Phonon::VolumeFaderEffect::FadeCurve fadeCurve() const override;
    void setFadeCurve(Phonon::VolumeFaderEffect::FadeCurve fadeCurve) override;
    void fadeTo(float volume, int fadeTime) override;
    void setVolume(float v) override;
    QPointer<MediaObject> mediaObject() { return m_mediaObject; }

private Q_SLOTS:
    void slotSetVolume(qreal v);

private:
    void abortFade();
    inline void setVolumeInternal(float v);

    Phonon::VolumeFaderEffect::FadeCurve m_fadeCurve;
    float m_fadeFromVolume;
    float m_fadeToVolume;
    QTimeLine *m_fadeTimeline;

};

} // namespace VLC
} // namespace Phonon

#endif // PHONON_VLC_VOLUMEFADEREFFECT_H
