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Diffstat (limited to 'examples/multimedia/videographicsitem/videoplayer.cpp')
| -rw-r--r-- | examples/multimedia/videographicsitem/videoplayer.cpp | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/examples/multimedia/videographicsitem/videoplayer.cpp b/examples/multimedia/videographicsitem/videoplayer.cpp new file mode 100644 index 0000000..83644db --- /dev/null +++ b/examples/multimedia/videographicsitem/videoplayer.cpp @@ -0,0 +1,210 @@ +/**************************************************************************** +** +** Copyright (C) 2009 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Technology Preview License Agreement accompanying +** this package. +** +** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "videoplayer.h" +#include "videoitem.h" + +#include <QtMultimedia> + +#ifndef QT_NO_OPENGL +# include <QtOpenGL/QGLWidget> +#endif + +VideoPlayer::VideoPlayer(QWidget *parent, Qt::WindowFlags flags) + : QWidget(parent, flags) + , videoItem(0) + , playButton(0) + , positionSlider(0) +{ + connect(&movie, SIGNAL(stateChanged(QMovie::MovieState)), + this, SLOT(movieStateChanged(QMovie::MovieState))); + connect(&movie, SIGNAL(frameChanged(int)), + this, SLOT(frameChanged(int))); + + videoItem = new VideoItem; + + QGraphicsScene *scene = new QGraphicsScene(this); + QGraphicsView *graphicsView = new QGraphicsView(scene); + +#ifndef QT_NO_OPENGL + graphicsView->setViewport(new QGLWidget); +#endif + + scene->addItem(videoItem); + + QSlider *rotateSlider = new QSlider(Qt::Horizontal); + rotateSlider->setRange(-180, 180); + rotateSlider->setValue(0); + + connect(rotateSlider, SIGNAL(valueChanged(int)), + this, SLOT(rotateVideo(int))); + + QAbstractButton *openButton = new QPushButton(tr("Open...")); + connect(openButton, SIGNAL(clicked()), this, SLOT(openFile())); + + playButton = new QPushButton; + playButton->setEnabled(false); + playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); + + connect(playButton, SIGNAL(clicked()), + this, SLOT(play())); + + positionSlider = new QSlider(Qt::Horizontal); + positionSlider->setRange(0, 0); + + connect(positionSlider, SIGNAL(sliderMoved(int)), + this, SLOT(setPosition(int))); + + connect(&movie, SIGNAL(frameChanged(int)), + positionSlider, SLOT(setValue(int))); + + QBoxLayout *controlLayout = new QHBoxLayout; + controlLayout->setMargin(0); + controlLayout->addWidget(openButton); + controlLayout->addWidget(playButton); + controlLayout->addWidget(positionSlider); + + QBoxLayout *layout = new QVBoxLayout; + layout->addWidget(graphicsView); + layout->addWidget(rotateSlider); + layout->addLayout(controlLayout); + + setLayout(layout); +} + +VideoPlayer::~VideoPlayer() +{ +} + +void VideoPlayer::openFile() +{ + QString fileName = QFileDialog::getOpenFileName(this, tr("Open Movie")); + + if (!fileName.isEmpty()) { + if (videoItem->isStarted()) + videoItem->stop(); + + movie.setFileName(fileName); + + playButton->setEnabled(true); + positionSlider->setMaximum(movie.frameCount()); + + movie.jumpToFrame(0); + } +} + +void VideoPlayer::play() +{ + switch(movie.state()) { + case QMovie::NotRunning: + movie.start(); + break; + case QMovie::Paused: + movie.setPaused(false); + break; + case QMovie::Running: + movie.setPaused(true); + break; + } +} + +void VideoPlayer::movieStateChanged(QMovie::MovieState state) +{ + switch(state) { + case QMovie::NotRunning: + case QMovie::Paused: + playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); + break; + case QMovie::Running: + playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause)); + break; + } +} + +void VideoPlayer::frameChanged(int frame) +{ + if (!presentImage(movie.currentImage())) { + movie.stop(); + playButton->setEnabled(false); + positionSlider->setMaximum(0); + } else { + positionSlider->setValue(frame); + } +} + +void VideoPlayer::setPosition(int frame) +{ + movie.jumpToFrame(frame); +} + +void VideoPlayer::rotateVideo(int angle) +{ + //rotate around the center of video element + qreal x = videoItem->boundingRect().width() / 2.0; + qreal y = videoItem->boundingRect().height() / 2.0; + videoItem->setTransform(QTransform().translate(x, y).rotate(angle).translate(-x, -y)); +} + +bool VideoPlayer::presentImage(const QImage &image) +{ + QVideoFrame frame(image); + + if (!frame.isValid()) + return false; + + QVideoSurfaceFormat currentFormat = videoItem->surfaceFormat(); + + if (frame.pixelFormat() != currentFormat.pixelFormat() + || frame.size() != currentFormat.frameSize()) { + QVideoSurfaceFormat format(frame.size(), frame.pixelFormat()); + + if (!videoItem->start(format)) + return false; + } + + if (!videoItem->present(frame)) { + videoItem->stop(); + + return false; + } else { + return true; + } +} |