Add AudioEngine with new implementation
Change-Id: I5eebe662ecbce9814ed3e763db56df9be737d11f Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
This commit is contained in:
Ling Hu
Qt by Nokia
379
src/imports/audioengine/qdeclarative_attenuationmodel_p.cpp
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379
src/imports/audioengine/qdeclarative_attenuationmodel_p.cpp
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/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the plugins of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qdeclarative_attenuationmodel_p.h"
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#include "qdebug.h"
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#define DEBUG_AUDIOENGINE
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QT_USE_NAMESPACE
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QDeclarativeAttenuationModel::QDeclarativeAttenuationModel(QObject *parent)
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: QObject(parent)
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, m_complete(false)
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{
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}
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QDeclarativeAttenuationModel::~QDeclarativeAttenuationModel()
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{
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}
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void QDeclarativeAttenuationModel::classBegin()
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{
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if (!parent() || !parent()->inherits("QDeclarativeAudioEngine")) {
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qWarning("AttenuationModel must be defined inside AudioEngine!");
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//TODO: COMPILE_EXCEPTION ?
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return;
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}
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}
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void QDeclarativeAttenuationModel::componentComplete()
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{
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if (m_name.isEmpty()) {
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qWarning("AttenuationModel must have a name!");
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return;
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}
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m_complete = true;
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}
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QString QDeclarativeAttenuationModel::name() const
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{
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return m_name;
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}
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void QDeclarativeAttenuationModel::setName(const QString& name)
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{
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if (m_complete) {
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qWarning("AttenuationModel: you can not change name after initialization.");
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return;
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}
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m_name = name;
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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/*!
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\qmlclass AttenuationModelLinear QDeclarativeAttenuationModelLinear
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\since 5.0
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\brief The AttenuationModelLinear element allows you to define a linear attenuation curve for
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Sound element.
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\ingroup qml-multimedia
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\inherits Item
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This element is part of the \bold{QtAudioEngine 1.0} module.
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AttenuationModelLinear must be defined inside AudioEngine.
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\qml
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import QtQuick 2.0
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import QtAudioEngine 1.0
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Rectangle {
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color:"white"
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width: 300
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height: 500
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AudioEngine {
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id:audioengine
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AttenuationModelLinear {
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name:"linear"
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start: 20
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end: 180
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}
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AudioSample {
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name:"explosion"
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source: "explosion-02.wav"
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}
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Sound {
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name:"explosion"
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attenuationModel: "linear"
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PlayVariation {
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sample:"explosion"
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}
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}
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}
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}
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\endqml
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*/
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/*!
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\qmlproperty string AttenuationModelLinear::name
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This property holds the name of AttenuationModelLinear, must be unique among all attenuation
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models and only defined once.
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*/
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QDeclarativeAttenuationModelLinear::QDeclarativeAttenuationModelLinear(QObject *parent)
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: QDeclarativeAttenuationModel(parent)
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, m_start(0)
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, m_end(1)
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{
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}
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void QDeclarativeAttenuationModelLinear::componentComplete()
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{
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if (m_start > m_end) {
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qSwap(m_start, m_end);
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qWarning() << "AttenuationModelLinear[" << m_name << "]: start must be less or equal than end.";
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}
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QDeclarativeAttenuationModel::componentComplete();
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}
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/*!
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\qmlproperty real AttenuationModelLinear::start
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This property holds the start distance. There will be no attenuation if the distance from sound
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to listener is within this range.
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The default value is 0.
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*/
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qreal QDeclarativeAttenuationModelLinear::startDistance() const
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{
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return m_start;
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}
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void QDeclarativeAttenuationModelLinear::setStartDistance(qreal startDist)
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{
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if (m_complete) {
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qWarning() << "AttenuationModelLinear[" << m_name << "]: you can not change properties after initialization.";
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return;
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}
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if (startDist < 0) {
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qWarning() << "AttenuationModelLinear[" << m_name << "]: start must be no less than 0.";
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return;
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}
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m_start = startDist;
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}
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/*!
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\qmlproperty real AttenuationModelLinear::end
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This property holds the end distance. There will be no sound hearable if the distance from sound
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to listener is larger than this.
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The default value is 1.
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*/
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qreal QDeclarativeAttenuationModelLinear::endDistance() const
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{
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return m_end;
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}
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void QDeclarativeAttenuationModelLinear::setEndDistance(qreal endDist)
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{
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if (m_complete) {
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qWarning() << "AttenuationModelLinear[" << m_name << "]: you can not change properties after initialization.";
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return;
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}
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if (endDist < 0) {
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qWarning() << "AttenuationModelLinear[" << m_name << "]: end must be no greater than 0.";
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return;
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}
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m_end = endDist;
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}
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qreal QDeclarativeAttenuationModelLinear::calculateGain(const QVector3D &listenerPosition, const QVector3D &sourcePosition) const
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{
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qreal md = m_end - m_start;
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if (md == 0)
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return 1;
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qreal d = qBound(qreal(0), (listenerPosition - sourcePosition).length() - m_start, md);
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return qreal(1) - (d / md);
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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/*!
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\qmlclass AttenuationModelInverse QDeclarativeAttenuationModelInverse
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\since 5.0
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\brief The AttenuationModelInverse element allows you to define a non-linear attenuation curve
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for Sound element.
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\ingroup qml-multimedia
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\inherits Item
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This element is part of the \bold{QtAudioEngine 1.0} module.
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AttenuationModelInverse must be defined inside AudioEngine.
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\qml
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import QtQuick 2.0
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import QtAudioEngine 1.0
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Rectangle {
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color:"white"
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width: 300
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height: 500
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AudioEngine {
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id:audioengine
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AttenuationModelInverse {
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name:"linear"
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start: 20
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end: 500
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rolloff: 1.5
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}
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AudioSample {
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name:"explosion"
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source: "explosion-02.wav"
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}
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Sound {
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name:"explosion"
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attenuationModel: "linear"
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PlayVariation {
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sample:"explosion"
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}
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}
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}
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}
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\endqml
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Attenuation factor is calculated as below:
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distance: distance from sound to listener
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d = min(max(distance, start), end);
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attenuation = start / (start + (d - start) * rolloff);
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*/
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/*!
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\qmlproperty string AttenuationModelInverse::name
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This property holds the name of AttenuationModelInverse, must be unique among all attenuation
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models and only defined once.
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*/
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/*!
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\qmlproperty real AttenuationModelInverse::start
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This property holds the start distance. There will be no attenuation if the distance from sound
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to listener is within this range.
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The default value is 1.
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*/
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/*!
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\qmlproperty real AttenuationModelInverse::end
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This property holds the end distance. There will be no further attenuation if the distance from
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sound to listener is larger than this.
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The default value is 1000.
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*/
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/*!
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\qmlproperty real AttenuationModelInverse::rolloff
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This property holds the rolloff factor. The bigger the value is, the faster the sound attenuates.
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The default value is 1.
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*/
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QDeclarativeAttenuationModelInverse::QDeclarativeAttenuationModelInverse(QObject *parent)
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: QDeclarativeAttenuationModel(parent)
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, m_ref(1)
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, m_max(1000)
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, m_rolloff(1)
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{
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}
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void QDeclarativeAttenuationModelInverse::componentComplete()
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{
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if (m_ref > m_max) {
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qSwap(m_ref, m_max);
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qWarning() << "AttenuationModelInverse[" << m_name << "]: referenceDistance must be less or equal than maxDistance.";
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}
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QDeclarativeAttenuationModel::componentComplete();
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}
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qreal QDeclarativeAttenuationModelInverse::referenceDistance() const
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{
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return m_ref;
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}
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void QDeclarativeAttenuationModelInverse::setReferenceDistance(qreal referenceDistance)
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{
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if (m_complete) {
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qWarning() << "AttenuationModelInverse[" << m_name << "]: you can not change properties after initialization.";
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return;
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}
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if (referenceDistance <= 0) {
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qWarning() << "AttenuationModelInverse[" << m_name << "]: referenceDistance must be greater than 0.";
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return;
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}
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m_ref = referenceDistance;
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}
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qreal QDeclarativeAttenuationModelInverse::maxDistance() const
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{
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return m_max;
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}
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void QDeclarativeAttenuationModelInverse::setMaxDistance(qreal maxDistance)
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{
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if (m_complete) {
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qWarning() << "AttenuationModelInverse[" << m_name << "]: you can not change properties after initialization.";
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return;
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}
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if (maxDistance <= 0) {
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qWarning() << "AttenuationModelInverse[" << m_name << "]: maxDistance must be greater than 0.";
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return;
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}
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m_max = maxDistance;
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}
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qreal QDeclarativeAttenuationModelInverse::rolloffFactor() const
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{
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return m_rolloff;
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}
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void QDeclarativeAttenuationModelInverse::setRolloffFactor(qreal rolloffFactor)
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{
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if (m_complete) {
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qWarning() << "AttenuationModelInverse[" << m_name << "]: you can not change properties after initialization.";
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return;
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}
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m_rolloff = rolloffFactor;
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}
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qreal QDeclarativeAttenuationModelInverse::calculateGain(const QVector3D &listenerPosition, const QVector3D &sourcePosition) const
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{
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Q_ASSERT(m_ref > 0);
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return m_ref / (m_ref + (qBound(m_ref, (listenerPosition - sourcePosition).length(), m_max) - m_ref) * m_rolloff);
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}
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