Camera zoom control - version for the AVFoundation plugin

AVFCameraZoomControl for AVFoundation plugin (videoZoomFactor in
AVCaptureDeviceFormat). iOS only.

Change-Id: I585b8df4c2a477971ada7bd81fabbd44f2371d98
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/src/plugins/avfoundation/camera/avfcamerazoomcontrol.h b/src/plugins/avfoundation/camera/avfcamerazoomcontrol.h
new file mode 100644
index 000000000..463f510e4
--- /dev/null
+++ b/src/plugins/avfoundation/camera/avfcamerazoomcontrol.h
@@ -0,0 +1,79 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef AVFCAMERAZOOMCONTROL_H
+#define AVFCAMERAZOOMCONTROL_H
+
+#include <QtMultimedia/qcamerazoomcontrol.h>
+#include <QtMultimedia/qcamera.h>
+
+#include <AVFoundation/AVFoundation.h>
+
+QT_BEGIN_NAMESPACE
+
+class AVFCameraService;
+class AVFCameraSession;
+class AVFCameraControl;
+
+class AVFCameraZoomControl : public QCameraZoomControl
+{
+    Q_OBJECT
+public:
+    AVFCameraZoomControl(AVFCameraService *service);
+
+    qreal maximumOpticalZoom() const Q_DECL_OVERRIDE;
+    qreal maximumDigitalZoom() const Q_DECL_OVERRIDE;
+
+    qreal requestedOpticalZoom() const Q_DECL_OVERRIDE;
+    qreal requestedDigitalZoom() const Q_DECL_OVERRIDE;
+    qreal currentOpticalZoom() const Q_DECL_OVERRIDE;
+    qreal currentDigitalZoom() const Q_DECL_OVERRIDE;
+
+    void zoomTo(qreal optical, qreal digital) Q_DECL_OVERRIDE;
+
+private Q_SLOTS:
+    void cameraStateChanged();
+
+private:
+    void zoomToRequestedDigital();
+
+    AVFCameraSession *m_session;
+
+    CGFloat m_maxZoomFactor;
+    CGFloat m_zoomFactor;
+    CGFloat m_requestedZoomFactor;
+};
+
+QT_END_NAMESPACE
+
+#endif