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Diffstat (limited to 'src/imports/audioengine/qdeclarative_playvariation_p.cpp')
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diff --git a/src/imports/audioengine/qdeclarative_playvariation_p.cpp b/src/imports/audioengine/qdeclarative_playvariation_p.cpp new file mode 100644 index 000000000..ec0682723 --- /dev/null +++ b/src/imports/audioengine/qdeclarative_playvariation_p.cpp @@ -0,0 +1,287 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qdeclarative_playvariation_p.h" +#include "qdeclarative_audioengine_p.h" +#include "qsoundinstance_p.h" +#include "qdebug.h" + +#define DEBUG_AUDIOENGINE + +QT_USE_NAMESPACE + +/*! + \qmlclass PlayVariation QDeclarativePlayVariation + \since 5.0 + \brief The PlayVariation element allows you to define a playback variation for \l Sound element. + So each time the playback of the same sound can be a slightly different even with the same + AudioSample. + + \ingroup qml-multimedia + \inherits Item + + This element is part of the \bold{QtAudioEngine 1.0} module. + + PlayVariation must be defined inside \l Sound element. + + \qml + import QtQuick 2.0 + import QtAudioEngine 1.0 + + Rectangle { + color:"white" + width: 300 + height: 500 + + AudioEngine { + id:audioengine + + AudioSample { + name:"explosion01" + source: "explosion-01.wav" + } + + AudioSample { + name:"explosion02" + source: "explosion-02.wav" + } + + Sound { + name:"explosion" + PlayVariation { + sample:"explosion01" + minPitch: 0.8 + maxPitch: 1.1 + } + PlayVariation { + sample:"explosion01" + minGain: 1.1 + maxGain: 1.5 + } + } + } + } + \endqml + +*/ +QDeclarativePlayVariation::QDeclarativePlayVariation(QObject *parent) + : QObject(parent) + , m_complete(false) + , m_looping(false) + , m_maxGain(1) + , m_minGain(1) + , m_maxPitch(1) + , m_minPitch(1) + , m_sampleObject(0) +{ +} + +QDeclarativePlayVariation::~QDeclarativePlayVariation() +{ +} + +void QDeclarativePlayVariation::classBegin() +{ + if (!parent() || !parent()->inherits("QDeclarativeSound")) { + qWarning("PlayVariation must be defined inside Sound!"); + return; + } +} + +void QDeclarativePlayVariation::componentComplete() +{ + if (m_maxGain < m_minGain) { + qWarning("PlayVariation: maxGain must be no less than minGain"); + qSwap(m_minGain, m_maxGain); + } + if (m_maxPitch < m_minPitch) { + qWarning("PlayVariation: maxPitch must be no less than minPitch"); + qSwap(m_minPitch, m_maxPitch); + } + m_complete = true; +} + +/*! + \qmlproperty string PlayVariation::sample + + This property specifies which \l AudioSample this variation will use. +*/ +QString QDeclarativePlayVariation::sample() const +{ + return m_sample; +} + +void QDeclarativePlayVariation::setSample(const QString& sample) +{ + if (m_complete) { + qWarning("PlayVariation: cannot change properties after initialization."); + return; + } + m_sample = sample; +} + +/*! + \qmlproperty bool PlayVariation::looping + + This property indicates whether the playback will be looped or not. +*/ +bool QDeclarativePlayVariation::isLooping() const +{ + return m_looping; +} + +void QDeclarativePlayVariation::setLooping(bool looping) +{ + if (m_complete) { + qWarning("PlayVariation: cannot change properties after initialization."); + return; + } + m_looping = looping; +} + +/*! + \qmlproperty real PlayVariation::maxGain + + This property specifies the maximum gain adjustment that can be applied in any playback. +*/ +qreal QDeclarativePlayVariation::maxGain() const +{ + return m_maxGain; +} + +void QDeclarativePlayVariation::setMaxGain(qreal maxGain) +{ + if (m_complete) { + qWarning("PlayVariation: cannot change properties after initialization."); + return; + } + if (maxGain <= 0) { + qWarning("PlayVariation: maxGain must be greater than 0"); + return; + } + m_maxGain = maxGain; +} + +/*! + \qmlproperty real PlayVariation::minGain + + This property specifies the minimum gain adjustment that can be applied in any playback. +*/ +qreal QDeclarativePlayVariation::minGain() const +{ + return m_minGain; +} + +void QDeclarativePlayVariation::setMinGain(qreal minGain) +{ + if (m_complete) { + qWarning("PlayVariation: cannot change properties after initialization."); + return; + } + if (minGain < 0) { + qWarning("PlayVariation: minGain must be no less than 0"); + return; + } + m_minGain = minGain; +} + +/*! + \qmlproperty real PlayVariation::maxPitch + + This property specifies the maximum pitch adjustment that can be applied in any playback. +*/ +qreal QDeclarativePlayVariation::maxPitch() const +{ + return m_maxPitch; +} + +void QDeclarativePlayVariation::setMaxPitch(qreal maxPitch) +{ + if (m_complete) { + qWarning("PlayVariation: cannot change properties after initialization."); + return; + } + if (maxPitch < 0) { + qWarning("PlayVariation: maxPitch must be no less than 0"); + return; + } + m_maxPitch = maxPitch; +} + +/*! + \qmlproperty real PlayVariation::minPitch + + This property specifies the minimum pitch adjustment that can be applied in any playback. +*/ +qreal QDeclarativePlayVariation::minPitch() const +{ + return m_minPitch; +} + +void QDeclarativePlayVariation::setMinPitch(qreal minPitch) +{ + if (m_complete) { + qWarning("PlayVariation: cannot change properties after initialization."); + return; + } + if (m_minPitch < 0) { + qWarning("PlayVariation: m_minPitch must be no less than 0"); + return; + } + m_minPitch = minPitch; +} + +QDeclarativeAudioSample* QDeclarativePlayVariation::sampleObject() const +{ + return m_sampleObject; +} + +void QDeclarativePlayVariation::setSampleObject(QDeclarativeAudioSample *sampleObject) +{ + m_sampleObject = sampleObject; +} + +void QDeclarativePlayVariation::applyParameters(QSoundInstance *soundInstance) +{ + qreal pitch = qreal(qrand() % 1001) * 0.001f * (m_maxPitch - m_minPitch) + m_minPitch; + qreal gain = qreal(qrand() % 1001) * 0.001f * (m_maxGain - m_minGain) + m_minGain; + soundInstance->updateVariationParameters(pitch, gain, m_looping); +} |