/*  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;

            //paramaters 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