1 files changed, 121 insertions, 0 deletions
diff --git a/src/plugins/gstreamer/camerabin/camerabinzoom.cpp b/src/plugins/gstreamer/camerabin/camerabinzoom.cpp
new file mode 100644
index 000000000..9b42c4e1d
--- /dev/null
+++ b/src/plugins/gstreamer/camerabin/camerabinzoom.cpp
@@ -0,0 +1,121 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 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, 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.
+**
+** 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "camerabinzoom.h"
+#include "camerabinsession.h"
+
+#include <gst/interfaces/photography.h>
+
+#define ZOOM_PROPERTY "zoom"
+#define MAX_ZOOM_PROPERTY "max-zoom"
+
+QT_BEGIN_NAMESPACE
+
+CameraBinZoom::CameraBinZoom(CameraBinSession *session)
+    : QCameraZoomControl(session)
+    , m_session(session)
+    , m_requestedOpticalZoom(1.0)
+    , m_requestedDigitalZoom(1.0)
+{
+
+}
+
+CameraBinZoom::~CameraBinZoom()
+{
+}
+
+qreal CameraBinZoom::maximumOpticalZoom() const
+{
+    return 1.0;
+}
+
+qreal CameraBinZoom::maximumDigitalZoom() const
+{
+    gfloat zoomFactor = 1.0;
+    g_object_get(GST_BIN(m_session->cameraBin()), MAX_ZOOM_PROPERTY, &zoomFactor, NULL);
+    return zoomFactor;
+}
+
+qreal CameraBinZoom::requestedDigitalZoom() const
+{
+    return m_requestedDigitalZoom;
+}
+
+qreal CameraBinZoom::requestedOpticalZoom() const
+{
+    return m_requestedOpticalZoom;
+}
+
+qreal CameraBinZoom::currentOpticalZoom() const
+{
+    return 1.0;
+}
+
+qreal CameraBinZoom::currentDigitalZoom() const
+{
+    gfloat zoomFactor = 1.0;
+    g_object_get(GST_BIN(m_session->cameraBin()), ZOOM_PROPERTY, &zoomFactor, NULL);
+    return zoomFactor;
+}
+
+void CameraBinZoom::zoomTo(qreal optical, qreal digital)
+{
+    qreal oldDigitalZoom = currentDigitalZoom();
+
+    if (m_requestedDigitalZoom != digital) {
+        m_requestedDigitalZoom = digital;
+        emit requestedDigitalZoomChanged(digital);
+    }
+
+    if (m_requestedOpticalZoom != optical) {
+        m_requestedOpticalZoom = optical;
+        emit requestedOpticalZoomChanged(optical);
+    }
+
+    digital = qBound(qreal(1.0), digital, maximumDigitalZoom());
+    g_object_set(GST_BIN(m_session->cameraBin()), ZOOM_PROPERTY, digital, NULL);
+
+    qreal newDigitalZoom = currentDigitalZoom();
+    if (!qFuzzyCompare(oldDigitalZoom, newDigitalZoom))
+        emit currentDigitalZoomChanged(digital);
+}
+
+QT_END_NAMESPACE