Initial implementation of Mac camera backend

Based on AVFoundation framework

Change-Id: If4cfd105a592f50b42606624548b9ffc870e3e47
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>

src/plugins/avfoundation/camera/avfcamerametadatacontrol.mm

@@ -0,0 +1,84 @@
+/****************************************************************************
+**
+** 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 "avfcamerametadatacontrol.h"
+#include "avfcamerasession.h"
+#include "avfcameraservice.h"
+
+QT_USE_NAMESPACE
+
+//metadata support is not implemented yet
+
+AVFCameraMetaDataControl::AVFCameraMetaDataControl(AVFCameraService *service, QObject *parent)
+    :QMetaDataWriterControl(parent), m_service(service)
+{
+}
+
+AVFCameraMetaDataControl::~AVFCameraMetaDataControl()
+{
+}
+
+bool AVFCameraMetaDataControl::isMetaDataAvailable() const
+{
+    return !m_tags.isEmpty();
+}
+
+bool AVFCameraMetaDataControl::isWritable() const
+{
+    return false;
+}
+
+QVariant AVFCameraMetaDataControl::metaData(const QString &key) const
+{
+    return m_tags.value(key);
+}
+
+void AVFCameraMetaDataControl::setMetaData(const QString &key, const QVariant &value)
+{
+    m_tags.insert(key, value);
+}
+
+QStringList AVFCameraMetaDataControl::availableMetaData() const
+{
+    return m_tags.keys();
+}
+
+#include "moc_avfcamerametadatacontrol.cpp"