Add AudioEngine with new implementation
Change-Id: I5eebe662ecbce9814ed3e763db56df9be737d11f Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
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Ling Hu
Qt by Nokia
287
src/imports/audioengine/qdeclarative_playvariation_p.cpp
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287
src/imports/audioengine/qdeclarative_playvariation_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_playvariation_p.h"
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#include "qdeclarative_audioengine_p.h"
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#include "qsoundinstance_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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/*!
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\qmlclass PlayVariation QDeclarativePlayVariation
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\since 5.0
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\brief The PlayVariation element allows you to define a playback variation for \l Sound element.
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So each time the playback of the same sound can be a slightly different even with the same
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AudioSample.
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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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PlayVariation must be defined inside \l Sound element.
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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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AudioSample {
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name:"explosion01"
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source: "explosion-01.wav"
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}
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AudioSample {
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name:"explosion02"
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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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PlayVariation {
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sample:"explosion01"
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minPitch: 0.8
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maxPitch: 1.1
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}
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PlayVariation {
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sample:"explosion01"
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minGain: 1.1
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maxGain: 1.5
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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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QDeclarativePlayVariation::QDeclarativePlayVariation(QObject *parent)
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: QObject(parent)
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, m_complete(false)
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, m_looping(false)
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, m_maxGain(1)
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, m_minGain(1)
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, m_maxPitch(1)
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, m_minPitch(1)
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, m_sampleObject(0)
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{
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}
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QDeclarativePlayVariation::~QDeclarativePlayVariation()
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{
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}
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void QDeclarativePlayVariation::classBegin()
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{
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if (!parent() || !parent()->inherits("QDeclarativeSound")) {
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qWarning("PlayVariation must be defined inside Sound!");
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return;
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}
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}
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void QDeclarativePlayVariation::componentComplete()
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{
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if (m_maxGain < m_minGain) {
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qWarning("PlayVariation: maxGain must be no less than minGain");
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qSwap(m_minGain, m_maxGain);
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}
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if (m_maxPitch < m_minPitch) {
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qWarning("PlayVariation: maxPitch must be no less than minPitch");
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qSwap(m_minPitch, m_maxPitch);
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}
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m_complete = true;
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}
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/*!
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\qmlproperty string PlayVariation::sample
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This property specifies which \l AudioSample this variation will use.
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*/
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QString QDeclarativePlayVariation::sample() const
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{
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return m_sample;
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}
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void QDeclarativePlayVariation::setSample(const QString& sample)
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{
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if (m_complete) {
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qWarning("PlayVariation: cannot change properties after initialization.");
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return;
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}
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m_sample = sample;
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}
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/*!
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\qmlproperty bool PlayVariation::looping
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This property indicates whether the playback will be looped or not.
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*/
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bool QDeclarativePlayVariation::isLooping() const
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{
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return m_looping;
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}
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void QDeclarativePlayVariation::setLooping(bool looping)
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{
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if (m_complete) {
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qWarning("PlayVariation: cannot change properties after initialization.");
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return;
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}
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m_looping = looping;
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}
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/*!
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\qmlproperty real PlayVariation::maxGain
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This property specifies the maximum gain adjustment that can be applied in any playback.
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*/
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qreal QDeclarativePlayVariation::maxGain() const
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{
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return m_maxGain;
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}
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void QDeclarativePlayVariation::setMaxGain(qreal maxGain)
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{
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if (m_complete) {
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qWarning("PlayVariation: cannot change properties after initialization.");
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return;
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}
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if (maxGain <= 0) {
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qWarning("PlayVariation: maxGain must be greater than 0");
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return;
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}
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m_maxGain = maxGain;
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}
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/*!
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\qmlproperty real PlayVariation::minGain
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This property specifies the minimum gain adjustment that can be applied in any playback.
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*/
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qreal QDeclarativePlayVariation::minGain() const
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{
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return m_minGain;
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}
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void QDeclarativePlayVariation::setMinGain(qreal minGain)
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{
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if (m_complete) {
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qWarning("PlayVariation: cannot change properties after initialization.");
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return;
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}
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if (minGain < 0) {
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qWarning("PlayVariation: minGain must be no less than 0");
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return;
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}
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m_minGain = minGain;
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}
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/*!
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\qmlproperty real PlayVariation::maxPitch
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This property specifies the maximum pitch adjustment that can be applied in any playback.
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*/
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qreal QDeclarativePlayVariation::maxPitch() const
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{
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return m_maxPitch;
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}
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void QDeclarativePlayVariation::setMaxPitch(qreal maxPitch)
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{
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if (m_complete) {
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qWarning("PlayVariation: cannot change properties after initialization.");
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return;
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}
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if (maxPitch < 0) {
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qWarning("PlayVariation: maxPitch must be no less than 0");
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return;
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}
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m_maxPitch = maxPitch;
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}
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/*!
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\qmlproperty real PlayVariation::minPitch
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This property specifies the minimum pitch adjustment that can be applied in any playback.
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*/
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qreal QDeclarativePlayVariation::minPitch() const
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{
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return m_minPitch;
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}
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void QDeclarativePlayVariation::setMinPitch(qreal minPitch)
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{
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if (m_complete) {
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qWarning("PlayVariation: cannot change properties after initialization.");
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return;
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}
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if (m_minPitch < 0) {
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qWarning("PlayVariation: m_minPitch must be no less than 0");
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return;
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}
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m_minPitch = minPitch;
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}
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QDeclarativeAudioSample* QDeclarativePlayVariation::sampleObject() const
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{
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return m_sampleObject;
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}
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void QDeclarativePlayVariation::setSampleObject(QDeclarativeAudioSample *sampleObject)
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{
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m_sampleObject = sampleObject;
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}
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void QDeclarativePlayVariation::applyParameters(QSoundInstance *soundInstance)
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{
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qreal pitch = qreal(qrand() % 1001) * 0.001f * (m_maxPitch - m_minPitch) + m_minPitch;
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qreal gain = qreal(qrand() % 1001) * 0.001f * (m_maxGain - m_minGain) + m_minGain;
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soundInstance->updateVariationParameters(pitch, gain, m_looping);
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}
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