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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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
\inmodule QtMultimedia
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 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. In general,
implementing a QMediaService is outside of the scope of this documentation
and support on the relevant mailing lists or IRC channels should be sought.
\sa QMediaObject, QMediaControl
*/
/*!
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
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