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/****************************************************************************
**
** Copyright (C) 2014 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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
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