9011296e65
Since we use an explicit backgroundaudio class, there is no need to wait for other property to determine the mediaobject type. So it is better to init the mediaobject at classBegin to prevent being accessed before mediaobject initialized. Change-Id: Ia55b8b4c1ab70cc0acbf6f49bcb3e20bdb813a88 Reviewed-by: Michael Goddard <michael.goddard@nokia.com> Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com> Reviewed-by: Dmytro Poplavskiy <dmytro.poplavskiy@nokia.com>
142 lines
4.5 KiB
C++
142 lines
4.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part 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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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qdeclarativebackgroundaudio_p.h"
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#include <qmediabackgroundplaybackcontrol.h>
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#include <qmediaservice.h>
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void QDeclarativeBackgroundAudio::classBegin()
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{
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setObject(this, Q_MEDIASERVICE_BACKGROUNDMEDIAPLAYER);
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if (m_mediaService) {
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m_backgroundPlaybackControl =
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static_cast<QMediaBackgroundPlaybackControl*>(
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m_mediaService->requestControl(QMediaBackgroundPlaybackControl_iid));
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if (m_backgroundPlaybackControl) {
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connect(m_backgroundPlaybackControl, SIGNAL(acquired()), this, SIGNAL(acquiredChanged()));
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connect(m_backgroundPlaybackControl, SIGNAL(lost()), this, SIGNAL(acquiredChanged()));
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} else {
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qWarning("can not get QMediaBackgroundPlaybackControl!");
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}
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} else {
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qWarning("Unable to get any background mediaplayer!");
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}
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emit mediaObjectChanged();
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//Note: we are not calling QDeclarativeAudio::classBegin here,
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//otherwise there will be conflict for setObject().
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}
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void QDeclarativeBackgroundAudio::componentComplete()
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{
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QDeclarativeAudio::componentComplete();
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}
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QDeclarativeBackgroundAudio::QDeclarativeBackgroundAudio(QObject *parent)
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: QDeclarativeAudio(parent)
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, m_backgroundPlaybackControl(0)
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{
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}
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QDeclarativeBackgroundAudio::~QDeclarativeBackgroundAudio()
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{
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if (m_backgroundPlaybackControl)
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m_mediaService->releaseControl(m_backgroundPlaybackControl);
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}
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/*!
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\qmlproperty string BackgroundAudio::contextId
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This property holds the unique contextId for the application
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When a new contextId is set, the previously set contextId will be released automatically.
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*/
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QString QDeclarativeBackgroundAudio::contextId() const
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{
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return m_contextId;
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}
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void QDeclarativeBackgroundAudio::setContextId(QString contextId)
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{
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if (m_contextId == contextId)
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return;
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m_contextId = contextId;
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if (m_backgroundPlaybackControl)
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m_backgroundPlaybackControl->setContextId(m_contextId);
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emit contextIdChanged();
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}
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/*!
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\qmlproperty bool BackgroundAudio::acquired
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This property indicates whether the application holds the playback resource in music daemon
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*/
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bool QDeclarativeBackgroundAudio::isAcquired() const
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{
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if (!m_backgroundPlaybackControl)
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return false;
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return m_backgroundPlaybackControl->isAcquired();
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}
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/*!
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\qmlmethod BackgroundAudio::acquire()
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try to acquire the playback resource in music daemon
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*/
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void QDeclarativeBackgroundAudio::acquire()
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{
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if (isAcquired() || !m_backgroundPlaybackControl)
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return;
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m_backgroundPlaybackControl->acquire();
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}
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/*!
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\qmlmethod BackgroundAudio::acquire()
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try to release the playback resource in music daemon
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*/
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void QDeclarativeBackgroundAudio::release()
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{
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if (!isAcquired() || !m_backgroundPlaybackControl)
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return;
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m_backgroundPlaybackControl->release();
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}
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