author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 23 Jun 2010 19:08:38 +0300 | |
changeset 14 | 6fbed849b4f4 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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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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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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|
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#include "videowidgetsurface.h" |
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|
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#include <QtGui> |
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#include <qabstractvideosurface.h> |
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#include <qvideosurfaceformat.h> |
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|
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VideoWidgetSurface::VideoWidgetSurface(QWidget *widget, QObject *parent) |
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: QAbstractVideoSurface(parent) |
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, widget(widget) |
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, imageFormat(QImage::Format_Invalid) |
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{ |
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} |
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//! [0] |
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QList<QVideoFrame::PixelFormat> VideoWidgetSurface::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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//! [0] |
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//! [1] |
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bool VideoWidgetSurface::isFormatSupported( |
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const QVideoSurfaceFormat &format, QVideoSurfaceFormat *similar) const |
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{ |
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Q_UNUSED(similar); |
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const QImage::Format imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat()); |
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const QSize size = format.frameSize(); |
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return imageFormat != QImage::Format_Invalid |
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&& !size.isEmpty() |
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&& format.handleType() == QAbstractVideoBuffer::NoHandle; |
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} |
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//! [1] |
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//! [2] |
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bool VideoWidgetSurface::start(const QVideoSurfaceFormat &format) |
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{ |
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const QImage::Format imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat()); |
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const QSize size = format.frameSize(); |
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if (imageFormat != QImage::Format_Invalid && !size.isEmpty()) { |
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this->imageFormat = imageFormat; |
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imageSize = size; |
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sourceRect = format.viewport(); |
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QAbstractVideoSurface::start(format); |
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widget->updateGeometry(); |
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updateVideoRect(); |
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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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//! [2] |
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109 |
|
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//! [3] |
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void VideoWidgetSurface::stop() |
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{ |
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currentFrame = QVideoFrame(); |
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targetRect = QRect(); |
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115 |
|
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QAbstractVideoSurface::stop(); |
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|
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widget->update(); |
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} |
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//! [3] |
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121 |
|
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//! [4] |
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bool VideoWidgetSurface::present(const QVideoFrame &frame) |
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{ |
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if (surfaceFormat().pixelFormat() != frame.pixelFormat() |
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|| surfaceFormat().frameSize() != frame.size()) { |
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setError(IncorrectFormatError); |
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stop(); |
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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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|
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widget->repaint(targetRect); |
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|
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return true; |
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} |
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} |
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//! [4] |
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|
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//! [5] |
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void VideoWidgetSurface::updateVideoRect() |
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{ |
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QSize size = surfaceFormat().sizeHint(); |
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size.scale(widget->size().boundedTo(size), Qt::KeepAspectRatio); |
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|
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targetRect = QRect(QPoint(0, 0), size); |
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targetRect.moveCenter(widget->rect().center()); |
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} |
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//! [5] |
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|
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//! [6] |
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void VideoWidgetSurface::paint(QPainter *painter) |
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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, -widget->height()); |
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} |
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|
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QImage image( |
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currentFrame.bits(), |
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currentFrame.width(), |
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currentFrame.height(), |
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currentFrame.bytesPerLine(), |
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imageFormat); |
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|
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painter->drawImage(targetRect, image, sourceRect); |
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171 |
|
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painter->setTransform(oldTransform); |
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173 |
|
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currentFrame.unmap(); |
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} |
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} |
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//! [6] |