src/3rdparty/phonon/mmf/stereowidening.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 14 May 2010 16:40:13 +0300
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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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#include <StereoWideningBase.h>
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#include "stereowidening.h"
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QT_BEGIN_NAMESPACE
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using namespace Phonon;
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using namespace Phonon::MMF;
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// Define functions which depend on concrete native effect class name
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PHONON_MMF_DEFINE_EFFECT_FUNCTIONS(StereoWidening)
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/*! \class MMF::StereoWidening
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  \internal
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*/
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StereoWidening::StereoWidening(QObject *parent, const QList<EffectParameter>& parameters)
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    :   AbstractAudioEffect::AbstractAudioEffect(parent, parameters)
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{
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}
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int StereoWidening::parameterChanged(const EffectParameter &param,
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                                 const QVariant &value)
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{
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    Q_ASSERT_X(param.id() == ParameterBase, Q_FUNC_INFO, "Invalid parameter ID");
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    const qreal externalLevel = value.toReal();
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    const int internalLevel = param.toInternalValue(externalLevel);
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    TRAPD(err, concreteEffect()->SetStereoWideningLevelL(internalLevel));
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    return err;
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}
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//-----------------------------------------------------------------------------
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// Static functions
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//-----------------------------------------------------------------------------
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const char* StereoWidening::description()
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{
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    return "Stereo widening";
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}
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bool StereoWidening::getParameters(CMdaAudioOutputStream *stream,
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    QList<EffectParameter> &parameters)
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{
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    bool supported = false;
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    QScopedPointer<CStereoWidening> effect;
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    TRAPD(err, effect.reset(CStereoWidening::NewL(*stream)));
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    if (KErrNone == err) {
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        supported = true;
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        const qreal defaultValue =
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            Phonon::MMF::EffectParameter::toExternalValue
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                (effect->StereoWideningLevel(), 0, 100);
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        EffectParameter param(
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             /* parameterId */        ParameterBase,
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             /* name */               tr("Level (%)"),
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             /* hints */              EffectParameter::IntegerHint,
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             /* defaultValue */       QVariant(defaultValue),
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             /* minimumValue */       QVariant(qreal(-1.0)),
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             /* maximumValue */       QVariant(qreal(+1.0)));
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        param.setInternalRange(0, 100);
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        parameters.append(param);
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    }
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    return supported;
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}
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QT_END_NAMESPACE
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