Initial copy of QtMultimediaKit.

Comes from original repo, with SHA1:
2c82d5611655e5967f5c5095af50c0991c4378b2

src/plugins/gstreamer/qgstreamervideooverlay.cpp

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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgstreamervideooverlay.h"
+#include "qvideosurfacegstsink.h"
+
+#include <qvideosurfaceformat.h>
+
+#include "qx11videosurface.h"
+
+#ifndef QT_NO_XVIDEO
+
+QGstreamerVideoOverlay::QGstreamerVideoOverlay(QObject *parent)
+    : QVideoWindowControl(parent)
+    , m_surface(new QX11VideoSurface)
+    , m_videoSink(reinterpret_cast<GstElement*>(QVideoSurfaceGstSink::createSink(m_surface)))
+    , m_aspectRatioMode(Qt::KeepAspectRatio)
+    , m_fullScreen(false)
+{
+    if (m_videoSink) {
+        gst_object_ref(GST_OBJECT(m_videoSink)); //Take ownership
+        gst_object_sink(GST_OBJECT(m_videoSink));
+    }
+
+    connect(m_surface, SIGNAL(surfaceFormatChanged(QVideoSurfaceFormat)),
+            this, SLOT(surfaceFormatChanged()));
+}
+
+QGstreamerVideoOverlay::~QGstreamerVideoOverlay()
+{
+    if (m_videoSink)
+        gst_object_unref(GST_OBJECT(m_videoSink));
+
+    delete m_surface;
+}
+
+WId QGstreamerVideoOverlay::winId() const
+{
+    return m_surface->winId();
+}
+
+void QGstreamerVideoOverlay::setWinId(WId id)
+{
+    bool wasReady = isReady();
+    m_surface->setWinId(id);
+
+    if (isReady() != wasReady)
+        emit readyChanged(!wasReady);
+}
+
+QRect QGstreamerVideoOverlay::displayRect() const
+{
+    return m_displayRect;
+}
+
+void QGstreamerVideoOverlay::setDisplayRect(const QRect &rect)
+{
+    m_displayRect = rect;
+
+    setScaledDisplayRect();
+}
+
+Qt::AspectRatioMode QGstreamerVideoOverlay::aspectRatioMode() const
+{
+    return m_aspectRatioMode;
+}
+
+void QGstreamerVideoOverlay::setAspectRatioMode(Qt::AspectRatioMode mode)
+{
+    m_aspectRatioMode = mode;
+
+    setScaledDisplayRect();
+}
+
+void QGstreamerVideoOverlay::repaint()
+{
+}
+
+int QGstreamerVideoOverlay::brightness() const
+{
+    return m_surface->brightness();
+}
+
+void QGstreamerVideoOverlay::setBrightness(int brightness)
+{
+    m_surface->setBrightness(brightness);
+
+    emit brightnessChanged(m_surface->brightness());
+}
+
+int QGstreamerVideoOverlay::contrast() const
+{
+    return m_surface->contrast();
+}
+
+void QGstreamerVideoOverlay::setContrast(int contrast)
+{
+    m_surface->setContrast(contrast);
+
+    emit contrastChanged(m_surface->contrast());
+}
+
+int QGstreamerVideoOverlay::hue() const
+{
+    return m_surface->hue();
+}
+
+void QGstreamerVideoOverlay::setHue(int hue)
+{
+    m_surface->setHue(hue);
+
+    emit hueChanged(m_surface->hue());
+}
+
+int QGstreamerVideoOverlay::saturation() const
+{
+    return m_surface->saturation();
+}
+
+void QGstreamerVideoOverlay::setSaturation(int saturation)
+{
+    m_surface->setSaturation(saturation);
+
+    emit saturationChanged(m_surface->saturation());
+}
+
+bool QGstreamerVideoOverlay::isFullScreen() const
+{
+    return m_fullScreen;
+}
+
+void QGstreamerVideoOverlay::setFullScreen(bool fullScreen)
+{
+    emit fullScreenChanged(m_fullScreen = fullScreen);
+}
+
+QSize QGstreamerVideoOverlay::nativeSize() const
+{
+    return m_surface->surfaceFormat().sizeHint();
+}
+
+QAbstractVideoSurface *QGstreamerVideoOverlay::surface() const
+{
+    return m_surface;
+}
+
+GstElement *QGstreamerVideoOverlay::videoSink()
+{
+    return m_videoSink;
+}
+
+void QGstreamerVideoOverlay::surfaceFormatChanged()
+{
+    setScaledDisplayRect();
+
+    emit nativeSizeChanged();
+}
+
+void QGstreamerVideoOverlay::setScaledDisplayRect()
+{
+    QRect formatViewport = m_surface->surfaceFormat().viewport();
+
+    switch (m_aspectRatioMode) {
+    case Qt::KeepAspectRatio:
+        {
+            QSize size = m_surface->surfaceFormat().sizeHint();
+            size.scale(m_displayRect.size(), Qt::KeepAspectRatio);
+
+            QRect rect(QPoint(0, 0), size);
+            rect.moveCenter(m_displayRect.center());
+
+            m_surface->setDisplayRect(rect);
+            m_surface->setViewport(formatViewport);
+        }
+        break;
+    case Qt::IgnoreAspectRatio:
+        m_surface->setDisplayRect(m_displayRect);
+        m_surface->setViewport(formatViewport);
+        break;
+    case Qt::KeepAspectRatioByExpanding:
+        {
+            QSize size = m_displayRect.size();
+            size.scale(m_surface->surfaceFormat().sizeHint(), Qt::KeepAspectRatio);
+
+            QRect viewport(QPoint(0, 0), size);
+            viewport.moveCenter(formatViewport.center());
+            m_surface->setDisplayRect(m_displayRect);
+            m_surface->setViewport(viewport);
+        }
+        break;
+    };
+}
+
+#endif //QT_NO_XVIDEO