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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part 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 "qmediaservice.h"
#include "qmediaservice_p.h"
#include <QtCore/qtimer.h>
QT_BEGIN_NAMESPACE
/*!
\class QMediaService
\brief The QMediaService class provides a common base class for media
service implementations.
\ingroup multimedia
\ingroup multimedia_control
\ingroup multimedia_core
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.
\snippet doc/src/snippets/multimedia-snippets/media.cpp Request control
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
|
