/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the examples of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:BSD$+
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** You may use this file under the terms of the BSD license as follows:+
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**+
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** "Redistribution and use in source and binary forms, with or without+
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** modification, are permitted provided that the following conditions are+
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** met:+
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**   * Redistributions of source code must retain the above copyright+
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**     notice, this list of conditions and the following disclaimer.+
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**   * Redistributions in binary form must reproduce the above copyright+
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**     notice, this list of conditions and the following disclaimer in+
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**     the documentation and/or other materials provided with the+
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**     distribution.+
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**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor+
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**     the names of its contributors may be used to endorse or promote+
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**     products derived from this software without specific prior written+
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**     permission.+
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**+
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS+
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT+
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR+
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT+
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,+
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT+
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,+
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY+
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT+
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE+
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "videoitem.h"+
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+
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#include <QtMultimedia>+
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+
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VideoItem::VideoItem(QGraphicsItem *parent)+
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    : QGraphicsItem(parent)+
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    , imageFormat(QImage::Format_Invalid)+
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    , framePainted(false)+
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{+
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}+
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+
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VideoItem::~VideoItem()+
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{+
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}+
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+
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QRectF VideoItem::boundingRect() const+
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{+
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    return QRectF(QPointF(0,0), surfaceFormat().sizeHint());+
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}+
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+
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void VideoItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)+
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{+
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    Q_UNUSED(option);+
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    Q_UNUSED(widget);+
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+
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    if (currentFrame.map(QAbstractVideoBuffer::ReadOnly)) {+
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        const QTransform oldTransform = painter->transform();+
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+
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        if (surfaceFormat().scanLineDirection() == QVideoSurfaceFormat::BottomToTop) {+
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           painter->scale(1, -1);+
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           painter->translate(0, -boundingRect().height());+
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        }+
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+
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        painter->drawImage(boundingRect(), QImage(+
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                currentFrame.bits(),+
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                imageSize.width(),+
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                imageSize.height(),+
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                imageFormat));+
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+
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        painter->setTransform(oldTransform);+
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+
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        framePainted = true;+
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+
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        currentFrame.unmap();+
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    }+
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}+
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+
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QList<QVideoFrame::PixelFormat> VideoItem::supportedPixelFormats(+
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        QAbstractVideoBuffer::HandleType handleType) const+
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{+
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    if (handleType == QAbstractVideoBuffer::NoHandle) {+
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        return QList<QVideoFrame::PixelFormat>()+
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                << QVideoFrame::Format_RGB32+
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                << QVideoFrame::Format_ARGB32+
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                << QVideoFrame::Format_ARGB32_Premultiplied+
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                << QVideoFrame::Format_RGB565+
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                << QVideoFrame::Format_RGB555;+
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    } else {+
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        return QList<QVideoFrame::PixelFormat>();+
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    }+
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}+
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+
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bool VideoItem::start(const QVideoSurfaceFormat &format)+
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{+
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    if (isFormatSupported(format)) {+
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        imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat());+
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        imageSize = format.frameSize();+
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        framePainted = true;+
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+
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        QAbstractVideoSurface::start(format);+
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+
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        prepareGeometryChange();+
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+
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        return true;+
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    } else {+
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        return false;+
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    }+
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}+
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+
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void VideoItem::stop()+
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{+
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    currentFrame = QVideoFrame();+
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    framePainted = false;+
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+
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    QAbstractVideoSurface::stop();+
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}+
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+
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bool VideoItem::present(const QVideoFrame &frame)+
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{+
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    if (!framePainted) {+
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        if (!QAbstractVideoSurface::isActive())+
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            setError(StoppedError);+
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+
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        return false;+
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    } else {+
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        currentFrame = frame;+
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        framePainted = false;+
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+
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        update();+
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+
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        return true;+
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    }+
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}+
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