Allow the user to specify the viewfinder resolution instead of guessing

Guessing badly prevents the camerabin pipeline from loading at all and
the fallbacks used are not representive of the capabilities of most
cameras. So either stay out of the process and let gstreamer negotiate
a resolution if it can, or use a resolution supplied through the viewfinder
settings control by someone hopefully better informed.

Task-number: QTBUG-30842
Change-Id: Iec2dcc2476f38822f9e0d02301e46a1f49b7c6da
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>

1 files changed, 106 insertions, 0 deletions

diff --git a/src/plugins/gstreamer/camerabin/camerabinviewfindersettings.cpp b/src/plugins/gstreamer/camerabin/camerabinviewfindersettings.cpp
new file mode 100644
index 000000000..373dbee77
--- /dev/null
+++ b/src/plugins/gstreamer/camerabin/camerabinviewfindersettings.cpp
@@ -0,0 +1,106 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Jolla Ltd.
+** Contact: http://www.qt-project.org/legal
+**
+** 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 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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include "camerabinviewfindersettings.h"
+
+
+QT_BEGIN_NAMESPACE
+
+CameraBinViewfinderSettings::CameraBinViewfinderSettings(QObject *parent)
+    : QCameraViewfinderSettingsControl(parent)
+{
+}
+
+CameraBinViewfinderSettings::~CameraBinViewfinderSettings()
+{
+}
+
+bool CameraBinViewfinderSettings::isViewfinderParameterSupported(ViewfinderParameter parameter) const
+{
+    switch (parameter) {
+    case Resolution:
+        return true;
+    case PixelAspectRatio:
+    case MinimumFrameRate:
+    case MaximumFrameRate:
+    case PixelFormat:
+    case UserParameter:
+        return false;
+    }
+    return false;
+}
+
+QVariant CameraBinViewfinderSettings::viewfinderParameter(ViewfinderParameter parameter) const
+{
+    switch (parameter) {
+    case Resolution:
+        return m_resolution;
+    case PixelAspectRatio:
+    case MinimumFrameRate:
+    case MaximumFrameRate:
+    case PixelFormat:
+    case UserParameter:
+        return QVariant();
+    }
+    return false;
+}
+
+void CameraBinViewfinderSettings::setViewfinderParameter(ViewfinderParameter parameter, const QVariant &value)
+{
+    switch (parameter) {
+    case Resolution:
+        m_resolution = value.toSize();
+    case PixelAspectRatio:
+    case MinimumFrameRate:
+    case MaximumFrameRate:
+    case PixelFormat:
+    case UserParameter:
+        break;
+    }
+}
+
+QSize CameraBinViewfinderSettings::resolution() const
+{
+    return m_resolution;
+}
+
+QT_END_NAMESPACE