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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "videoitem.h"
+
+#include <QtMultimedia>
+
+VideoItem::VideoItem(QGraphicsItem *parent)
+ : QGraphicsItem(parent)
+ , imageFormat(QImage::Format_Invalid)
+ , framePainted(false)
+{
+}
+
+VideoItem::~VideoItem()
+{
+}
+
+QRectF VideoItem::boundingRect() const
+{
+ return QRectF(QPointF(0,0), surfaceFormat().sizeHint());
+}
+
+void VideoItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+ Q_UNUSED(option);
+ Q_UNUSED(widget);
+
+ if (currentFrame.map(QAbstractVideoBuffer::ReadOnly)) {
+ const QTransform oldTransform = painter->transform();
+
+ if (surfaceFormat().scanLineDirection() == QVideoSurfaceFormat::BottomToTop) {
+ painter->scale(1, -1);
+ painter->translate(0, -boundingRect().height());
+ }
+
+ painter->drawImage(boundingRect(), QImage(
+ currentFrame.bits(),
+ imageSize.width(),
+ imageSize.height(),
+ imageFormat));
+
+ painter->setTransform(oldTransform);
+
+ framePainted = true;
+
+ currentFrame.unmap();
+ }
+}
+
+QList<QVideoFrame::PixelFormat> VideoItem::supportedPixelFormats(
+ QAbstractVideoBuffer::HandleType handleType) const
+{
+ if (handleType == QAbstractVideoBuffer::NoHandle) {
+ return QList<QVideoFrame::PixelFormat>()
+ << QVideoFrame::Format_RGB32
+ << QVideoFrame::Format_ARGB32
+ << QVideoFrame::Format_ARGB32_Premultiplied
+ << QVideoFrame::Format_RGB565
+ << QVideoFrame::Format_RGB555;
+ } else {
+ return QList<QVideoFrame::PixelFormat>();
+ }
+}
+
+bool VideoItem::start(const QVideoSurfaceFormat &format)
+{
+ if (isFormatSupported(format)) {
+ imageFormat = QVideoFrame::equivalentImageFormat(format.pixelFormat());
+ imageSize = format.frameSize();
+ framePainted = true;
+
+ QAbstractVideoSurface::start(format);
+
+ prepareGeometryChange();
+
+ return true;
+ } else {
+ return false;
+ }
+}
+
+void VideoItem::stop()
+{
+ currentFrame = QVideoFrame();
+ framePainted = false;
+
+ QAbstractVideoSurface::stop();
+}
+
+bool VideoItem::present(const QVideoFrame &frame)
+{
+ if (!framePainted) {
+ if (!isStarted())
+ setError(StoppedError);
+
+ return false;
+ } else {
+ currentFrame = frame;
+ framePainted = false;
+
+ update();
+
+ return true;
+ }
+}