2732e23887
- Renamed LICENSE.LGPL to LICENSE.LGPLv21 - Added LICENSE.LGPLv3 & LICENSE.GPLv2 - Removed LICENSE.GPL Change-Id: Ied06887225df341064c12bcc14c259ae74116f2e Reviewed-by: Jani Heikkinen <jani.heikkinen@digia.com>
143 lines
4.4 KiB
C++
143 lines
4.4 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL21$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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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, Digia gives you certain additional
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** rights. These rights are described in the Digia 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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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qmediacontrol_p.h"
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#include <qmetadatareadercontrol.h>
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QT_BEGIN_NAMESPACE
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/*!
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\class QMetaDataReaderControl
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\inmodule QtMultimedia
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\ingroup multimedia_control
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\brief The QMetaDataReaderControl class provides read access to the
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meta-data of a QMediaService's media.
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If a QMediaService can provide read or write access to the meta-data of
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its current media it will implement QMetaDataReaderControl. This control
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provides functions for both retrieving and setting meta-data values.
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Meta-data may be addressed by the keys defined in the
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QMediaMetaData namespace.
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The functionality provided by this control is exposed to application
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code by the meta-data members of QMediaObject, and so meta-data access
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is potentially available in any of the media object classes. Any media
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service may implement QMetaDataReaderControl.
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The interface name of QMetaDataReaderControl is
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\c org.qt-project.qt.metadatareadercontrol/5.0 as defined in
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QMetaDataReaderControl_iid.
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\sa QMediaService::requestControl(), QMediaObject
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*/
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/*!
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\macro QMetaDataReaderControl_iid
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\c org.qt-project.qt.metadatareadercontrol/5.0
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Defines the interface name of the QMetaDataReaderControl class.
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\relates QMetaDataReaderControl
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*/
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/*!
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Construct a QMetaDataReaderControl with \a parent. This class is meant as a base class
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for service specific meta data providers so this constructor is protected.
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*/
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QMetaDataReaderControl::QMetaDataReaderControl(QObject *parent):
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QMediaControl(*new QMediaControlPrivate, parent)
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{
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}
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/*!
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Destroy the meta-data object.
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*/
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QMetaDataReaderControl::~QMetaDataReaderControl()
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{
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}
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/*!
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\fn bool QMetaDataReaderControl::isMetaDataAvailable() const
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Identifies if meta-data is available from a media service.
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Returns true if the meta-data is available and false otherwise.
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*/
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/*!
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\fn QVariant QMetaDataReaderControl::metaData(const QString &key) const
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Returns the meta-data for the given \a key.
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*/
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/*!
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\fn QMetaDataReaderControl::availableMetaData() const
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Returns a list of keys there is meta-data available for.
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*/
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/*!
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\fn void QMetaDataReaderControl::metaDataChanged()
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Signal the changes of meta-data.
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If multiple meta-data elements are changed,
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metaDataChanged(const QString &key, const QVariant &value) signal is emitted
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for each of them with metaDataChanged() changed emitted once.
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*/
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/*!
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\fn void QMetaDataReaderControl::metaDataChanged(const QString &key, const QVariant &value)
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Signal the changes of one meta-data element \a value with the given \a key.
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*/
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/*!
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\fn void QMetaDataReaderControl::metaDataAvailableChanged(bool available)
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Signal the availability of meta-data has changed, \a available will
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be true if the multimedia object has meta-data.
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*/
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#include "moc_qmetadatareadercontrol.cpp"
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QT_END_NAMESPACE
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