diff -r 000000000000 -r 876b1a06bc25 src/multimedia/qmediaservice.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/multimedia/qmediaservice.cpp Wed Aug 25 15:49:42 2010 +0300 @@ -0,0 +1,149 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt Mobility Components. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, 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. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qmediaservice.h" +#include "qmediaservice_p.h" + +#include + + + +QT_BEGIN_NAMESPACE + + +/*! + \class QMediaService + \brief The QMediaService class provides a common base class for media + service implementations. + \ingroup multimedia + \preliminary + + Media services provide implementations of the functionality promised + by media objects, and allow multiple providers to implement a QMediaObject. + + To provide the functionality of a QMediaObject media services implement + QMediaControl interfaces. Services typically implement one core media + control which provides the core feature of a media object, and some + number of additional controls which provide either optional features of + the media object, or features of a secondary media object or peripheral + object. + + A pointer to media service's QMediaControl implementation can be obtained + by passing the control's interface name to the requestControl() function. + + \code + QMediaPlayerControl *control = qobject_cast( + service->requestControl("com.nokia.Qt.QMediaPlayerControl/1.0")); + \endcode + + Media objects can use services loaded dynamically from plug-ins or + implemented statically within an applications. Plug-in based services + should also implement the QMediaServiceProviderPlugin interface. Static + services should implement the QMediaServiceProvider interface. + + \sa QMediaObject, QMediaControl, QMediaServiceProvider, QMediaServiceProviderPlugin +*/ + +/*! + Construct a media service with the given \a parent. This class is meant as a + base class for Multimedia services so this constructor is protected. +*/ + +QMediaService::QMediaService(QObject *parent) + : QObject(parent) + , d_ptr(new QMediaServicePrivate) +{ + d_ptr->q_ptr = this; +} + +/*! + \internal +*/ +QMediaService::QMediaService(QMediaServicePrivate &dd, QObject *parent) + : QObject(parent) + , d_ptr(&dd) +{ + d_ptr->q_ptr = this; +} + +/*! + Destroys a media service. +*/ + +QMediaService::~QMediaService() +{ + delete d_ptr; +} + +/*! + \fn QMediaControl* QMediaService::requestControl(const char *interface) + + Returns a pointer to the media control implementing \a interface. + + If the service does not implement the control, or if it is unavailable a + null pointer is returned instead. + + Controls must be returned to the service when no longer needed using the + releaseControl() function. +*/ + +/*! + \fn T QMediaService::requestControl() + + Returns a pointer to the media control of type T implemented by a media service. + + If the service does not implement the control, or if it is unavailable a + null pointer is returned instead. + + Controls must be returned to the service when no longer needed using the + releaseControl() function. +*/ + +/*! + \fn void QMediaService::releaseControl(QMediaControl *control); + + Releases a \a control back to the service. +*/ + +#include "moc_qmediaservice.cpp" + +QT_END_NAMESPACE +