GStreamer: Adjust the camera's manual color temperature through V4L2

GStreamer does not support setup of manual color temperature for the
camera. Now it is implemented through the V4L2 interface, where it is
works together with the GStreamer and covers the GStreamer's holes.

Change-Id: Icaeadeb4e21ec7865bcfa908bead318d4ead8ba5
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/src/plugins/gstreamer/camerabin/camerabinv4limageprocessing.h b/src/plugins/gstreamer/camerabin/camerabinv4limageprocessing.h
new file mode 100644
index 000000000..03b3917ed
--- /dev/null
+++ b/src/plugins/gstreamer/camerabin/camerabinv4limageprocessing.h
@@ -0,0 +1,80 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CAMERABINV4LIMAGEPROCESSINGCONTROL_H
+#define CAMERABINV4LIMAGEPROCESSINGCONTROL_H
+
+#include <qcamera.h>
+#include <qcameraimageprocessingcontrol.h>
+
+QT_BEGIN_NAMESPACE
+
+class CameraBinSession;
+
+class CameraBinV4LImageProcessing : public QCameraImageProcessingControl
+{
+    Q_OBJECT
+
+public:
+    CameraBinV4LImageProcessing(CameraBinSession *session);
+    virtual ~CameraBinV4LImageProcessing();
+
+    bool isParameterSupported(ProcessingParameter) const;
+    bool isParameterValueSupported(ProcessingParameter parameter, const QVariant &value) const;
+    QVariant parameter(ProcessingParameter parameter) const;
+    void setParameter(ProcessingParameter parameter, const QVariant &value);
+
+public slots:
+    void updateParametersInfo(QCamera::Status cameraStatus);
+
+private:
+    struct SourceParameterValueInfo {
+        SourceParameterValueInfo()
+            : cid(0)
+        {
+        }
+
+        qint32 defaultValue;
+        qint32 minimumValue;
+        qint32 maximumValue;
+        quint32 cid; // V4L control id
+    };
+
+private:
+    CameraBinSession *m_session;
+    QMap<ProcessingParameter, SourceParameterValueInfo> m_parametersInfo;
+};
+
+QT_END_NAMESPACE
+
+#endif // CAMERABINV4LIMAGEPROCESSINGCONTROL_H