/*  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_GSTREAMER_VOLUMEFADEREFFECT_H

#define Phonon_GSTREAMER_VOLUMEFADEREFFECT_H

#include "medianode.h"

#include "effect.h"

#include <phonon/effectinterface.h>

#include <phonon/effectparameter.h>

#include <phonon/volumefaderinterface.h>

#include <QtCore>

#include <gst/gst.h>

QT_BEGIN_NAMESPACE

namespace Phonon

{

namespace Gstreamer

{

    class VolumeFaderEffect : public Effect, public VolumeFaderInterface

    {

        Q_OBJECT

        Q_INTERFACES(Phonon::VolumeFaderInterface)

        public:

            VolumeFaderEffect(Backend *backend, QObject *parent = 0);

            ~VolumeFaderEffect();

            GstElement* createEffectBin();

            GstElement *audioElement() { return m_effectBin; }

            bool event(QEvent *);

            void updateFade();

            // VolumeFaderInterface:

            float volume() const;

            void setVolume(float volume);

            Phonon::VolumeFaderEffect::FadeCurve fadeCurve() const;

            void setFadeCurve(Phonon::VolumeFaderEffect::FadeCurve fadeCurve);

            void fadeTo(float volume, int fadeTime);

            Phonon::VolumeFaderEffect::FadeCurve m_fadeCurve;

            int m_fadeTimer;

            int m_fadeDuration;

            float m_fadeFromVolume;

            float m_fadeToVolume;

            QTime m_fadeStartTime;

    };

}} //namespace Phonon::Gstreamer

QT_END_NAMESPACE

#endif // Phonon_GSTREAMER_VOLUMEFADEREFFECT_H