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/* This file is part of the KDE project.
Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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_VOLUMEEFFECT_H
#define PHONON_VOLUMEEFFECT_H
#include "effect.h"
#include <phonon/volumefaderinterface.h>
QT_BEGIN_NAMESPACE
#ifndef QT_NO_PHONON_VOLUMEFADEREFFECT
namespace Phonon
{
namespace DS9
{
class VolumeEffectFilter;
class VolumeEffect : public Effect, public Phonon::VolumeFaderInterface
{
Q_OBJECT
Q_INTERFACES(Phonon::VolumeFaderInterface)
public:
VolumeEffect(QObject *parent);
//reimplementation
virtual float volume() const;
virtual void setVolume(float);
virtual Phonon::VolumeFaderEffect::FadeCurve fadeCurve() const;
virtual void setFadeCurve(Phonon::VolumeFaderEffect::FadeCurve);
virtual void fadeTo(float, int);
private:
float m_volume;
//parameters used to fade
Phonon::VolumeFaderEffect::FadeCurve m_fadeCurve;
bool m_fading; //determines if we should be fading.
float m_initialVolume;
float m_targetVolume;
int m_fadeDuration;
int m_fadeSamplePosition;
qreal (*m_fadeCurveFn)(const qreal, const qreal, const qreal);
//allow the filter to get access to that
friend class VolumeEffectFilter;
};
}
}
#endif //QT_NO_PHONON_VOLUMEFADEREFFECT
QT_END_NAMESPACE
#endif
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