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/avfvideodevicecontrol.mm

@@ -0,0 +1,119 @@
+/****************************************************************************
+**
+** 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 "avfcameradebug.h"
+#include "avfvideodevicecontrol.h"
+#include "avfcameraservice.h"
+
+QT_USE_NAMESPACE
+
+AVFVideoDeviceControl::AVFVideoDeviceControl(AVFCameraService *service, QObject *parent)
+   : QVideoDeviceSelectorControl(parent)
+   , m_service(service)
+   , m_selectedDevice(0)
+   , m_dirty(true)
+{
+    NSArray *videoDevices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
+    for (AVCaptureDevice *device in videoDevices) {
+        m_devices << QString::fromUtf8([[device uniqueID] UTF8String]);
+        m_deviceDescriptions << QString::fromUtf8([[device localizedName] UTF8String]);
+    }
+}
+
+AVFVideoDeviceControl::~AVFVideoDeviceControl()
+{
+}
+
+int AVFVideoDeviceControl::deviceCount() const
+{
+    return m_devices.size();
+}
+
+QString AVFVideoDeviceControl::deviceName(int index) const
+{
+    return m_devices[index];
+}
+
+QString AVFVideoDeviceControl::deviceDescription(int index) const
+{
+    return m_deviceDescriptions[index];
+}
+
+int AVFVideoDeviceControl::defaultDevice() const
+{
+    return 0;
+}
+
+int AVFVideoDeviceControl::selectedDevice() const
+{
+    return m_selectedDevice;
+}
+
+void AVFVideoDeviceControl::setSelectedDevice(int index)
+{
+    if (index != m_selectedDevice) {
+        m_dirty = true;
+        m_selectedDevice = index;
+        Q_EMIT selectedDeviceChanged(index);
+        Q_EMIT selectedDeviceChanged(m_devices[index]);
+    }
+}
+
+AVCaptureDevice *AVFVideoDeviceControl::createCaptureDevice()
+{
+    m_dirty = false;
+    AVCaptureDevice *device = 0;
+
+    if (!m_devices.isEmpty()) {
+        QString deviceId = m_devices.at(m_selectedDevice);
+
+        device = [AVCaptureDevice deviceWithUniqueID:
+                    [NSString stringWithUTF8String:
+                        deviceId.toUtf8().constData()]];
+    }
+
+    if (!device)
+        device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
+
+    return device;
+}
+
+#include "moc_avfvideodevicecontrol.cpp"