videowidgetsurface.h Example File

multimedia/videowidget/videowidgetsurface.h
 /****************************************************************************
 **
 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** You may use this file under the terms of the BSD license as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
 **     the names of its contributors may be used to endorse or promote
 **     products derived from this software without specific prior written
 **     permission.
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #ifndef VIDEOWIDGETSURFACE_H
 #define VIDEOWIDGETSURFACE_H

 #include <QtCore/QRect>
 #include <QtGui/QImage>
 #include <QtMultimedia/QAbstractVideoSurface>
 #include <QtMultimedia/QVideoFrame>

 class VideoWidgetSurface : public QAbstractVideoSurface
 {
     Q_OBJECT
 public:
     VideoWidgetSurface(QWidget *widget, QObject *parent = 0);

     QList<QVideoFrame::PixelFormat> supportedPixelFormats(
             QAbstractVideoBuffer::HandleType handleType = QAbstractVideoBuffer::NoHandle) const;
     bool isFormatSupported(const QVideoSurfaceFormat &format, QVideoSurfaceFormat *similar) const;

     bool start(const QVideoSurfaceFormat &format);
     void stop();

     bool present(const QVideoFrame &frame);

     QRect videoRect() const { return targetRect; }
     void updateVideoRect();

     void paint(QPainter *painter);

 private:
     QWidget *widget;
     QImage::Format imageFormat;
     QRect targetRect;
     QSize imageSize;
     QRect sourceRect;
     QVideoFrame currentFrame;
 };

 #endif