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/* This file is part of the KDE project.
Copyright (C) 2012 Digia Plc 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 "effectparameter.h"
QT_BEGIN_NAMESPACE
using namespace Phonon;
using namespace Phonon::MMF;
/*! \class MMF::EffectParameter
\internal
*/
MMF::EffectParameter::EffectParameter()
: m_hasInternalRange(false)
{
}
MMF::EffectParameter::EffectParameter(
int parameterId, const QString &name, Hints hints,
const QVariant &defaultValue, const QVariant &min,
const QVariant &max, const QVariantList &values,
const QString &description)
: Phonon::EffectParameter(parameterId, name, hints, defaultValue,
min, max, values, description)
, m_hasInternalRange(false)
{
}
void MMF::EffectParameter::setInternalRange(qint32 min, qint32 max)
{
Q_ASSERT_X(max >= min, Q_FUNC_INFO, "Invalid range");
m_internalRange = QPair<qint32, qint32>(min, max);
m_hasInternalRange = true;
}
qint32 MMF::EffectParameter::toInternalValue(qreal external) const
{
Q_ASSERT_X(m_hasInternalRange, Q_FUNC_INFO, "Does not have internal range");
const qint32 range = m_internalRange.second - m_internalRange.first;
return m_internalRange.first + ((1.0 + external) / 2) * range;
}
qreal MMF::EffectParameter::toExternalValue
(qint32 value, qint32 min, qint32 max)
{
Q_ASSERT_X(max >= min, Q_FUNC_INFO, "Invalid range");
const qint32 range = max - min;
return range == 0 ? 0.0 : ((2.0 * value - min) / range) - 1.0;
}
QT_END_NAMESPACE
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