diff options
author | Christian Stromme <christian.stromme@qt.io> | 2016-11-21 17:16:57 +0100 |
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committer | Christian Stromme <christian.stromme@qt.io> | 2018-01-22 20:50:12 +0000 |
commit | 469a18793a11b45ffa6f7ed3f873bddbae8e900d (patch) | |
tree | dde99d7ae682b3bb84b512e74e78982353f698af /src/plugins/directshow/camera/directshowcameraexposurecontrol.h | |
parent | d04483a5c13b6b5ac463f2a8d584839eab9aeede (diff) |
DirectShow: Add exposure control
Makes it possible to manually control the shutter speed and/or the
aperture on cameras that supports it.
[ChangeLog][DirectShow] Added support for manual camera exposure control
Change-Id: I340964f899fec365df870834b230c1d743ceb2e8
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
Diffstat (limited to 'src/plugins/directshow/camera/directshowcameraexposurecontrol.h')
-rw-r--r-- | src/plugins/directshow/camera/directshowcameraexposurecontrol.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/plugins/directshow/camera/directshowcameraexposurecontrol.h b/src/plugins/directshow/camera/directshowcameraexposurecontrol.h new file mode 100644 index 000000000..db3fc5984 --- /dev/null +++ b/src/plugins/directshow/camera/directshowcameraexposurecontrol.h @@ -0,0 +1,100 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef DIRECTSHOWCAMERAEXPOSURECONTROL_H +#define DIRECTSHOWCAMERAEXPOSURECONTROL_H + +#include <QtMultimedia/qcameraexposurecontrol.h> + +struct IAMCameraControl; + +QT_BEGIN_NAMESPACE + +class DSCameraSession; + +class DirectShowCameraExposureControl : public QCameraExposureControl +{ + Q_OBJECT +public: + DirectShowCameraExposureControl(DSCameraSession *session); + + bool isParameterSupported(ExposureParameter parameter) const override; + QVariantList supportedParameterRange(ExposureParameter parameter, bool *continuous) const override; + QVariant requestedValue(ExposureParameter parameter) const override; + QVariant actualValue(ExposureParameter parameter) const override; + bool setValue(ExposureParameter parameter, const QVariant &value) override; + +private Q_SLOTS: + void onStatusChanged(QCamera::Status status); + +private: + DSCameraSession *m_session; + + struct ExposureValues + { + long caps; + long minValue; + long maxValue; + long stepping; + long defaultValue; + } m_shutterSpeedValues, m_apertureValues; + + qreal m_requestedShutterSpeed; + qreal m_currentShutterSpeed; + + qreal m_requestedAperture; + qreal m_currentAperture; + + QVariantList m_supportedShutterSpeeds; + QVariantList m_supportedApertureValues; + QVariantList m_supportedExposureModes; + + QCameraExposure::ExposureMode m_requestedExposureMode; + QCameraExposure::ExposureMode m_currentExposureMode; + + void updateExposureSettings(); + + bool setShutterSpeed(IAMCameraControl *cameraControl, qreal shutterSpeed); + bool setAperture(IAMCameraControl *cameraControl, qreal aperture); + bool setExposureMode(IAMCameraControl *cameraControl, QCameraExposure::ExposureMode mode); +}; + +QT_END_NAMESPACE + +#endif // DIRECTSHOWCAMERAEXPOSURECONTROL_H |