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/* 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/>.
*/
#include "audioequalizer.h"
QT_BEGIN_NAMESPACE
using namespace Phonon;
using namespace Phonon::MMF;
/*! \class MMF::AudioEqualizer
\internal
*/
AudioEqualizer::AudioEqualizer(QObject *parent) : AbstractAudioEffect::AbstractAudioEffect(parent, createParams())
{
}
void AudioEqualizer::parameterChanged(const int pid,
const QVariant &value)
{
// There is no way to return an error from this function, so we just
// have to trap and ignore exceptions.
TRAP_IGNORE(static_cast<CAudioEqualizer *>(m_effect.data())->SetBandLevelL(pid, value.toInt()));
}
bool AudioEqualizer::activateOn(CPlayerType *player)
{
CAudioEqualizer *ptr = 0;
QT_TRAP_THROWING(ptr = CAudioEqualizer::NewL(*player));
m_effect.reset(ptr);
return true;
}
QList<EffectParameter> AudioEqualizer::createParams()
{
QList<EffectParameter> retval;
// We temporarily create an AudioPlayer, and run the effect on it, so
// we can extract the readonly data we need.
AudioPlayer dummyPlayer;
CAudioEqualizer *eqPtr = 0;
QT_TRAP_THROWING(eqPtr = CAudioEqualizer::NewL(*dummyPlayer.player());)
QScopedPointer<CAudioEqualizer> e(eqPtr);
TInt32 dbMin;
TInt32 dbMax;
e->DbLevelLimits(dbMin, dbMax);
const int bandCount = e->NumberOfBands();
for (int i = 0; i < bandCount; ++i) {
const qint32 hz = e->CenterFrequency(i);
const qint32 defVol = e->BandLevel(i);
retval.append(EffectParameter(i,
tr("Frequency band, %1 Hz").arg(hz),
EffectParameter::LogarithmicHint,
QVariant(qint32(defVol)),
QVariant(qint32(dbMin)),
QVariant(qint32(dbMax)),
QVariantList(),
QString()));
}
return retval;
}
QT_END_NAMESPACE
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