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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 "camerabinimageprocessing.h"
#include "camerabinsession.h"
#if GST_CHECK_VERSION(1,0,0)
# include <gst/video/colorbalance.h>
#else
# include <gst/interfaces/colorbalance.h>
#endif
QT_BEGIN_NAMESPACE
CameraBinImageProcessing::CameraBinImageProcessing(CameraBinSession *session)
:QCameraImageProcessingControl(session),
m_session(session)
{
#ifdef HAVE_GST_PHOTOGRAPHY
m_mappedWbValues[GST_PHOTOGRAPHY_WB_MODE_AUTO] = QCameraImageProcessing::WhiteBalanceAuto;
m_mappedWbValues[GST_PHOTOGRAPHY_WB_MODE_DAYLIGHT] = QCameraImageProcessing::WhiteBalanceSunlight;
m_mappedWbValues[GST_PHOTOGRAPHY_WB_MODE_CLOUDY] = QCameraImageProcessing::WhiteBalanceCloudy;
m_mappedWbValues[GST_PHOTOGRAPHY_WB_MODE_SUNSET] = QCameraImageProcessing::WhiteBalanceSunset;
m_mappedWbValues[GST_PHOTOGRAPHY_WB_MODE_TUNGSTEN] = QCameraImageProcessing::WhiteBalanceTungsten;
m_mappedWbValues[GST_PHOTOGRAPHY_WB_MODE_FLUORESCENT] = QCameraImageProcessing::WhiteBalanceFluorescent;
#endif
updateColorBalanceValues();
}
CameraBinImageProcessing::~CameraBinImageProcessing()
{
}
void CameraBinImageProcessing::updateColorBalanceValues()
{
if (!GST_IS_COLOR_BALANCE(m_session->cameraBin())) {
// Camerabin doesn't implement gstcolorbalance interface
return;
}
GstColorBalance *balance = GST_COLOR_BALANCE(m_session->cameraBin());
const GList *controls = gst_color_balance_list_channels(balance);
const GList *item;
GstColorBalanceChannel *channel;
gint cur_value;
qreal scaledValue = 0;
for (item = controls; item; item = g_list_next (item)) {
channel = (GstColorBalanceChannel *)item->data;
cur_value = gst_color_balance_get_value (balance, channel);
//map the [min_value..max_value] range to [-1.0 .. 1.0]
if (channel->min_value != channel->max_value) {
scaledValue = qreal(cur_value - channel->min_value) /
(channel->max_value - channel->min_value) * 2 - 1;
}
if (!g_ascii_strcasecmp (channel->label, "brightness")) {
m_values[QCameraImageProcessingControl::BrightnessAdjustment] = scaledValue;
} else if (!g_ascii_strcasecmp (channel->label, "contrast")) {
m_values[QCameraImageProcessingControl::ContrastAdjustment] = scaledValue;
} else if (!g_ascii_strcasecmp (channel->label, "saturation")) {
m_values[QCameraImageProcessingControl::SaturationAdjustment] = scaledValue;
}
}
}
bool CameraBinImageProcessing::setColorBalanceValue(const QString& channel, qreal value)
{
if (!GST_IS_COLOR_BALANCE(m_session->cameraBin())) {
// Camerabin doesn't implement gstcolorbalance interface
return false;
}
GstColorBalance *balance = GST_COLOR_BALANCE(m_session->cameraBin());
const GList *controls = gst_color_balance_list_channels(balance);
const GList *item;
GstColorBalanceChannel *colorBalanceChannel;
for (item = controls; item; item = g_list_next (item)) {
colorBalanceChannel = (GstColorBalanceChannel *)item->data;
if (!g_ascii_strcasecmp (colorBalanceChannel->label, channel.toLatin1())) {
//map the [-1.0 .. 1.0] range to [min_value..max_value]
gint scaledValue = colorBalanceChannel->min_value + qRound(
(value+1.0)/2.0 * (colorBalanceChannel->max_value - colorBalanceChannel->min_value));
gst_color_balance_set_value (balance, colorBalanceChannel, scaledValue);
return true;
}
}
return false;
}
QCameraImageProcessing::WhiteBalanceMode CameraBinImageProcessing::whiteBalanceMode() const
{
#ifdef HAVE_GST_PHOTOGRAPHY
GstPhotographyWhiteBalanceMode wbMode;
gst_photography_get_white_balance_mode(m_session->photography(), &wbMode);
return m_mappedWbValues[wbMode];
#else
return QCameraImageProcessing::WhiteBalanceAuto;
#endif
}
void CameraBinImageProcessing::setWhiteBalanceMode(QCameraImageProcessing::WhiteBalanceMode mode)
{
#ifdef HAVE_GST_PHOTOGRAPHY
if (isWhiteBalanceModeSupported(mode))
gst_photography_set_white_balance_mode(m_session->photography(), m_mappedWbValues.key(mode));
#else
Q_UNUSED(mode);
#endif
}
bool CameraBinImageProcessing::isWhiteBalanceModeSupported(QCameraImageProcessing::WhiteBalanceMode mode) const
{
#ifdef HAVE_GST_PHOTOGRAPHY
return m_mappedWbValues.values().contains(mode);
#else
return mode == QCameraImageProcessing::WhiteBalanceAuto;
#endif
}
bool CameraBinImageProcessing::isParameterSupported(QCameraImageProcessingControl::ProcessingParameter parameter) const
{
return parameter == QCameraImageProcessingControl::Contrast
|| parameter == QCameraImageProcessingControl::Brightness
|| parameter == QCameraImageProcessingControl::Saturation
|| parameter == QCameraImageProcessingControl::WhiteBalancePreset;
}
bool CameraBinImageProcessing::isParameterValueSupported(QCameraImageProcessingControl::ProcessingParameter parameter, const QVariant &value) const
{
switch (parameter) {
case ContrastAdjustment:
case BrightnessAdjustment:
case SaturationAdjustment:
return qAbs(value.toReal()) <= 1.0;
case WhiteBalancePreset:
return isWhiteBalanceModeSupported(value.value<QCameraImageProcessing::WhiteBalanceMode>());
default:
break;
}
return false;
}
QVariant CameraBinImageProcessing::parameter(
QCameraImageProcessingControl::ProcessingParameter parameter) const
{
if (parameter == QCameraImageProcessingControl::WhiteBalancePreset)
return QVariant::fromValue<QCameraImageProcessing::WhiteBalanceMode>(whiteBalanceMode());
else if (m_values.contains(parameter))
return m_values.value(parameter);
else
return QVariant();
}
void CameraBinImageProcessing::setParameter(QCameraImageProcessingControl::ProcessingParameter parameter,
const QVariant &value)
{
switch (parameter) {
case ContrastAdjustment:
setColorBalanceValue("contrast", value.toReal());
break;
case BrightnessAdjustment:
setColorBalanceValue("brightness", value.toReal());
break;
case SaturationAdjustment:
setColorBalanceValue("saturation", value.toReal());
break;
case WhiteBalancePreset:
setWhiteBalanceMode(value.value<QCameraImageProcessing::WhiteBalanceMode>());
break;
default:
break;
}
updateColorBalanceValues();
}
QT_END_NAMESPACE
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