diff options
Diffstat (limited to 'src/plugins/gstreamer/camerabin/camerabinv4limageprocessing.cpp')
| -rw-r--r-- | src/plugins/gstreamer/camerabin/camerabinv4limageprocessing.cpp | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/src/plugins/gstreamer/camerabin/camerabinv4limageprocessing.cpp b/src/plugins/gstreamer/camerabin/camerabinv4limageprocessing.cpp new file mode 100644 index 000000000..47522565c --- /dev/null +++ b/src/plugins/gstreamer/camerabin/camerabinv4limageprocessing.cpp @@ -0,0 +1,242 @@ +/**************************************************************************** +** +** Copyright (C) 2015 Denis Shienkov <denis.shienkov@gmail.com> +** Contact: http://www.qt.io/licensing/ +** +** 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 The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/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. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "camerabinv4limageprocessing.h" +#include "camerabinsession.h" + +#include <QDebug> + +#include <private/qcore_unix_p.h> +#include <linux/videodev2.h> + +QT_BEGIN_NAMESPACE + +CameraBinV4LImageProcessing::CameraBinV4LImageProcessing(CameraBinSession *session) + : QCameraImageProcessingControl(session) + , m_session(session) +{ +} + +CameraBinV4LImageProcessing::~CameraBinV4LImageProcessing() +{ +} + +bool CameraBinV4LImageProcessing::isParameterSupported( + ProcessingParameter parameter) const +{ + return m_parametersInfo.contains(parameter); +} + +bool CameraBinV4LImageProcessing::isParameterValueSupported( + ProcessingParameter parameter, const QVariant &value) const +{ + QMap<ProcessingParameter, SourceParameterValueInfo>::const_iterator sourceValueInfo = + m_parametersInfo.constFind(parameter); + if (sourceValueInfo == m_parametersInfo.constEnd()) + return false; + + switch (parameter) { + + case QCameraImageProcessingControl::WhiteBalancePreset: { + const QCameraImageProcessing::WhiteBalanceMode checkedValue = + value.value<QCameraImageProcessing::WhiteBalanceMode>(); + const QCameraImageProcessing::WhiteBalanceMode firstAllowedValue = + (*sourceValueInfo).minimumValue ? QCameraImageProcessing::WhiteBalanceAuto + : QCameraImageProcessing::WhiteBalanceManual; + const QCameraImageProcessing::WhiteBalanceMode secondAllowedValue = + (*sourceValueInfo).maximumValue ? QCameraImageProcessing::WhiteBalanceAuto + : QCameraImageProcessing::WhiteBalanceManual; + if (checkedValue != firstAllowedValue + && checkedValue != secondAllowedValue) { + return false; + } + } + break; + + case QCameraImageProcessingControl::ColorTemperature: { + const qint32 checkedValue = value.toInt(); + if (checkedValue < (*sourceValueInfo).minimumValue + || checkedValue > (*sourceValueInfo).maximumValue) { + return false; + } + } + break; + + default: + return false; + } + + return true; +} + +QVariant CameraBinV4LImageProcessing::parameter( + ProcessingParameter parameter) const +{ + QMap<ProcessingParameter, SourceParameterValueInfo>::const_iterator sourceValueInfo = + m_parametersInfo.constFind(parameter); + if (sourceValueInfo == m_parametersInfo.constEnd()) { + qWarning() << "Unable to get the parameter value: the parameter is not supported."; + return QVariant(); + } + + const QString deviceName = m_session->device(); + const int fd = qt_safe_open(deviceName.toLocal8Bit().constData(), O_RDONLY); + if (fd == -1) { + qWarning() << "Unable to open the camera" << deviceName + << "for read to get the parameter value:" << qt_error_string(errno); + return QVariant(); + } + + struct v4l2_control control; + ::memset(&control, 0, sizeof(control)); + control.id = (*sourceValueInfo).cid; + + const bool ret = (::ioctl(fd, VIDIOC_G_CTRL, &control) == 0); + + qt_safe_close(fd); + + if (!ret) { + qWarning() << "Unable to get the parameter value:" << qt_error_string(errno); + return QVariant(); + } + + switch (parameter) { + + case QCameraImageProcessingControl::WhiteBalancePreset: + return QVariant::fromValue<QCameraImageProcessing::WhiteBalanceMode>( + control.value ? QCameraImageProcessing::WhiteBalanceAuto + : QCameraImageProcessing::WhiteBalanceManual); + + case QCameraImageProcessingControl::ColorTemperature: + return QVariant::fromValue<qint32>(control.value); + + default: + return QVariant(); + } +} + +void CameraBinV4LImageProcessing::setParameter( + ProcessingParameter parameter, const QVariant &value) +{ + QMap<ProcessingParameter, SourceParameterValueInfo>::const_iterator sourceValueInfo = + m_parametersInfo.constFind(parameter); + if (sourceValueInfo == m_parametersInfo.constEnd()) { + qWarning() << "Unable to set the parameter value: the parameter is not supported."; + return; + } + + const QString deviceName = m_session->device(); + const int fd = qt_safe_open(deviceName.toLocal8Bit().constData(), O_WRONLY); + if (fd == -1) { + qWarning() << "Unable to open the camera" << deviceName + << "for write to set the parameter value:" << qt_error_string(errno); + return; + } + + struct v4l2_control control; + ::memset(&control, 0, sizeof(control)); + control.id = (*sourceValueInfo).cid; + + switch (parameter) { + + case QCameraImageProcessingControl::WhiteBalancePreset: { + const QCameraImageProcessing::WhiteBalanceMode m = + value.value<QCameraImageProcessing::WhiteBalanceMode>(); + if (m != QCameraImageProcessing::WhiteBalanceAuto + && m != QCameraImageProcessing::WhiteBalanceManual) + return; + + control.value = (m == QCameraImageProcessing::WhiteBalanceAuto) ? true : false; + } + break; + + case QCameraImageProcessingControl::ColorTemperature: + control.value = value.toInt(); + break; + + default: + return; + } + + if (::ioctl(fd, VIDIOC_S_CTRL, &control) != 0) + qWarning() << "Unable to set the parameter value:" << qt_error_string(errno); + + qt_safe_close(fd); +} + +void CameraBinV4LImageProcessing::updateParametersInfo( + QCamera::Status cameraStatus) +{ + if (cameraStatus == QCamera::UnloadedStatus) + m_parametersInfo.clear(); + else if (cameraStatus == QCamera::LoadedStatus) { + const QString deviceName = m_session->device(); + const int fd = qt_safe_open(deviceName.toLocal8Bit().constData(), O_RDONLY); + if (fd == -1) { + qWarning() << "Unable to open the camera" << deviceName + << "for read to query the parameter info:" << qt_error_string(errno); + return; + } + + static const struct SupportedParameterEntry { + quint32 cid; + QCameraImageProcessingControl::ProcessingParameter parameter; + } supportedParametersEntries[] = { + { V4L2_CID_AUTO_WHITE_BALANCE, QCameraImageProcessingControl::WhiteBalancePreset }, + { V4L2_CID_WHITE_BALANCE_TEMPERATURE, QCameraImageProcessingControl::ColorTemperature } + }; + + for (int i = 0; i < int(sizeof(supportedParametersEntries) / sizeof(SupportedParameterEntry)); ++i) { + struct v4l2_queryctrl queryControl; + ::memset(&queryControl, 0, sizeof(queryControl)); + queryControl.id = supportedParametersEntries[i].cid; + + if (::ioctl(fd, VIDIOC_QUERYCTRL, &queryControl) != 0) { + qWarning() << "Unable to query the parameter info:" << qt_error_string(errno); + continue; + } + + SourceParameterValueInfo sourceValueInfo; + sourceValueInfo.cid = queryControl.id; + sourceValueInfo.defaultValue = queryControl.default_value; + sourceValueInfo.maximumValue = queryControl.maximum; + sourceValueInfo.minimumValue = queryControl.minimum; + + m_parametersInfo.insert(supportedParametersEntries[i].parameter, sourceValueInfo); + } + + qt_safe_close(fd); + } +} + +QT_END_NAMESPACE |