src/3rdparty/phonon/mmf/audioequalizer.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 19 Feb 2010 23:40:16 +0200
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/*  This file is part of the KDE project.
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Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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This library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2.1 or 3 of the License.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library.  If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PHONON_MMF_AUDIOEQUALIZER_H
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#define PHONON_MMF_AUDIOEQUALIZER_H
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#include "abstractaudioeffect.h"
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class CAudioEqualizer;
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QT_BEGIN_NAMESPACE
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namespace Phonon
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{
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namespace MMF
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{
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/**
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 * @short A classic equalizer.
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 *
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 * The equalizer has a number of bands, and each band has a frequency, and a
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 * volume. With Phonon's API, this is modeled such that each band is one
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 * Phonon::EffectParameter, where Phonon::EffectParameter::id() is the band
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 * number, and the setting is the volume level.
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 */
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class AudioEqualizer : public AbstractAudioEffect
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{
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    Q_OBJECT
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public:
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    AudioEqualizer(QObject *parent, const QList<EffectParameter> &parameters);
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    // Static interface required by EffectFactory
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    static const char* description();
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    static bool getParameters(CMdaAudioOutputStream *stream,
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        QList<EffectParameter>& parameters);
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protected:
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    // AbstractAudioEffect
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    virtual void createEffect(AudioPlayer::NativePlayer *player);
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    virtual int effectParameterChanged(const EffectParameter &param,
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                                       const QVariant &value);
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private:
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    CAudioEqualizer *concreteEffect();
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};
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}
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}
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QT_END_NAMESPACE
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#endif
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