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/avfcameraserviceplugin.h

@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#ifndef AVFSERVICEPLUGIN_H
+#define AVFSERVICEPLUGIN_H
+
+#include <qmediaserviceproviderplugin.h>
+#include <QtCore/qmap.h>
+
+QT_BEGIN_NAMESPACE
+
+class AVFServicePlugin : public QMediaServiceProviderPlugin,
+                         public QMediaServiceSupportedDevicesInterface
+{
+    Q_OBJECT
+    Q_INTERFACES(QMediaServiceSupportedDevicesInterface)
+    Q_PLUGIN_METADATA(IID "org.qt-project.qt.mediaserviceproviderfactory/5.0" FILE "avfcamera.json")
+
+public:
+    AVFServicePlugin();
+
+    QMediaService* create(QString const& key);
+    void release(QMediaService *service);
+
+    QList<QByteArray> devices(const QByteArray &service) const;
+    QString deviceDescription(const QByteArray &service, const QByteArray &device);
+
+private:
+    void updateDevices() const;
+
+    mutable QList<QByteArray> m_cameraDevices;
+    mutable QMap<QByteArray, QString> m_cameraDescriptions;
+};
+
+QT_END_NAMESPACE
+
+#endif