Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
144 lines
4.3 KiB
C++
144 lines
4.3 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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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 The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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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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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "videoitem.h"
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#include <QtMultimedia>
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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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VideoItem::~VideoItem()
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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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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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if (currentFrame.map(QAbstractVideoBuffer::ReadOnly)) {
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const QTransform oldTransform = painter->transform();
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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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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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painter->setTransform(oldTransform);
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framePainted = true;
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currentFrame.unmap();
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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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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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QAbstractVideoSurface::start(format);
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prepareGeometryChange();
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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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void VideoItem::stop()
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{
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currentFrame = QVideoFrame();
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framePainted = false;
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QAbstractVideoSurface::stop();
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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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return false;
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} else {
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currentFrame = frame;
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framePainted = false;
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update();
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return true;
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}
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}
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