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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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()
{
QStringList supportedFormats;
foreach (QString fmt, QMovie::supportedFormats())
supportedFormats << fmt;
foreach (QString fmt, QImageReader::supportedImageFormats())
supportedFormats << fmt;
QString filter = "Images (";
foreach ( QString fmt, supportedFormats) {
filter.append(QString("*.%1 ").arg(fmt));
}
filter.append(")");
QString fileName = QFileDialog::getOpenFileName(this, tr("Open Movie"),
QDir::homePath(), filter);
if (!fileName.isEmpty()) {
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;
}
}
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