1 /*  This file is part of the KDE project.

     2 

     3 Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 

     5 This library is free software: you can redistribute it and/or modify

     6 it under the terms of the GNU Lesser General Public License as published by

     7 the Free Software Foundation, either version 2.1 or 3 of the License.

     8 

     9 This library is distributed in the hope that it will be useful,

    10 but WITHOUT ANY WARRANTY; without even the implied warranty of

    11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12 GNU Lesser General Public License for more details.

    13 

    14 You should have received a copy of the GNU Lesser General Public License

    15 along with this library.  If not, see <http://www.gnu.org/licenses/>.

    16 

    17 */

    18 

    19 #include <StereoWideningBase.h>

    20 #include "stereowidening.h"

    21 

    22 QT_BEGIN_NAMESPACE

    23 

    24 using namespace Phonon;

    25 using namespace Phonon::MMF;

    26 

    27 // Define functions which depend on concrete native effect class name

    28 PHONON_MMF_DEFINE_EFFECT_FUNCTIONS(StereoWidening)

    29 

    30 /*! \class MMF::StereoWidening

    31   \internal

    32 */

    33 

    34 StereoWidening::StereoWidening(QObject *parent, const QList<EffectParameter>& parameters)

    35     :   AbstractAudioEffect::AbstractAudioEffect(parent, parameters)

    36 {

    37 

    38 }

    39 

    40 int StereoWidening::parameterChanged(const EffectParameter &param,

    41                                  const QVariant &value)

    42 {

    43     Q_ASSERT_X(param.id() == ParameterBase, Q_FUNC_INFO, "Invalid parameter ID");

    44 

    45     const qreal externalLevel = value.toReal();

    46     const int internalLevel = param.toInternalValue(externalLevel);

    47 

    48     TRAPD(err, concreteEffect()->SetStereoWideningLevelL(internalLevel));

    49 

    50     return err;

    51 }

    52 

    53 //-----------------------------------------------------------------------------

    54 // Static functions

    55 //-----------------------------------------------------------------------------

    56 

    57 const char* StereoWidening::description()

    58 {

    59     return "Stereo widening";

    60 }

    61 

    62 bool StereoWidening::getParameters(CMdaAudioOutputStream *stream,

    63     QList<EffectParameter> &parameters)

    64 {

    65     bool supported = false;

    66 

    67     QScopedPointer<CStereoWidening> effect;

    68     TRAPD(err, effect.reset(CStereoWidening::NewL(*stream)));

    69 

    70     if (KErrNone == err) {

    71         supported = true;

    72 

    73         const qreal defaultValue =

    74             Phonon::MMF::EffectParameter::toExternalValue

    75                 (effect->StereoWideningLevel(), 0, 100);

    76 

    77         EffectParameter param(

    78              /* parameterId */        ParameterBase,

    79              /* name */               tr("Level (%)"),

    80              /* hints */              EffectParameter::IntegerHint,

    81              /* defaultValue */       QVariant(defaultValue),

    82              /* minimumValue */       QVariant(qreal(-1.0)),

    83              /* maximumValue */       QVariant(qreal(+1.0)));

    84 

    85         param.setInternalRange(0, 100);

    86         parameters.append(param);

    87     }

    88 

    89     return supported;

    90 }

    91 

    92 QT_END_NAMESPACE

    93