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 "effectparameter.h"

    20 

    21 QT_BEGIN_NAMESPACE

    22 

    23 using namespace Phonon;

    24 using namespace Phonon::MMF;

    25 

    26 /*! \class MMF::EffectParameter

    27   \internal

    28 */

    29 

    30 MMF::EffectParameter::EffectParameter()

    31     :   m_hasInternalRange(false)

    32 {

    33 

    34 }

    35 

    36 MMF::EffectParameter::EffectParameter(

    37             int parameterId, const QString &name, Hints hints,

    38             const QVariant &defaultValue, const QVariant &min,

    39             const QVariant &max, const QVariantList &values,

    40             const QString &description)

    41     :   Phonon::EffectParameter(parameterId, name, hints, defaultValue,

    42             min, max, values, description)

    43     ,   m_hasInternalRange(false)

    44 {

    45 

    46 }

    47 

    48 void MMF::EffectParameter::setInternalRange(qint32 min, qint32 max)

    49 {

    50     Q_ASSERT_X(max >= min, Q_FUNC_INFO, "Invalid range");

    51     m_internalRange = QPair<qint32, qint32>(min, max);

    52     m_hasInternalRange = true;

    53 }

    54 

    55 qint32 MMF::EffectParameter::toInternalValue(qreal external) const

    56 {

    57     Q_ASSERT_X(m_hasInternalRange, Q_FUNC_INFO, "Does not have internal range");

    58     const qint32 range = m_internalRange.second - m_internalRange.first;

    59     return m_internalRange.first + ((1.0 + external) / 2) * range;

    60 }

    61 

    62 qreal MMF::EffectParameter::toExternalValue

    63     (qint32 value, qint32 min, qint32 max)

    64 {

    65     Q_ASSERT_X(max >= min, Q_FUNC_INFO, "Invalid range");

    66     const qint32 range = max - min;

    67     return range == 0 ? 0.0 : ((2.0 * value - min) / range) - 1.0;

    68 }

    69 

    70 QT_END_NAMESPACE

    71