/*  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_QT7_AUDIOMIXER_H

#define Phonon_QT7_AUDIOMIXER_H

#include <QtCore/QObject>

#include <QtCore/QTime>

#include <QtCore/QEvent>

#include <phonon/effectinterface.h>

#include <phonon/effectparameter.h>

#include <phonon/volumefaderinterface.h>

#include "medianode.h"

#include "audionode.h"

QT_BEGIN_NAMESPACE

namespace Phonon

{

namespace QT7

{

    class AudioMixerAudioNode : public AudioNode

    {

        public:

            AudioMixerAudioNode();

            void setVolume(float volume, int bus = 0);

            float volume(int bus = 0);

        protected:

            ComponentDescription getAudioNodeDescription() const;

            void initializeAudioUnit();

        private:

            friend class AudioMixer;

            int m_numberOfBusses;

            float m_volume;

    };

    class AudioMixer : public MediaNode, Phonon::EffectInterface, Phonon::VolumeFaderInterface

    {

        Q_OBJECT

        Q_INTERFACES(Phonon::EffectInterface Phonon::VolumeFaderInterface)

        public:

            AudioMixer(QObject *parent = 0);

            ~AudioMixer();

            AudioMixerAudioNode *m_audioNode;

            Phonon::VolumeFaderEffect::FadeCurve m_fadeCurve;

            int m_fadeTimer;

            int m_fadeDuration;

            float m_fadeToVolume;

            float m_fadeFromVolume;

            QTime m_fadeStartTime;

            // EffectInterface:

            QList<Phonon::EffectParameter> parameters() const;

            QVariant parameterValue(const Phonon::EffectParameter &parameter) const;

            void setParameterValue(const Phonon::EffectParameter &parameter, const QVariant &newValue);

            // 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);

            void updateFade();

        protected:

            bool event(QEvent *event);

    };

}} //namespace Phonon::QT7

QT_END_NAMESPACE

#endif // Phonon_QT7_AUDIOMIXER_H