#include "videoplayer.h"
#include "videowidget.h"
#include <QtMultimedia>
VideoPlayer::VideoPlayer(QWidget *parent)
: QWidget(parent)
, surface(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)));
VideoWidget *videoWidget = new VideoWidget;
surface = videoWidget->videoSurface();
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(videoWidget);
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()) {
surface->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);
}
bool VideoPlayer::presentImage(const QImage &image)
{
QVideoFrame frame(image);
if (!frame.isValid())
return false;
QVideoSurfaceFormat currentFormat = surface->surfaceFormat();
if (frame.pixelFormat() != currentFormat.pixelFormat()
|| frame.size() != currentFormat.frameSize()) {
QVideoSurfaceFormat format(frame.size(), frame.pixelFormat());
if (!surface->start(format))
return false;
}
if (!surface->present(frame)) {
surface->stop();
return false;
} else {
return true;
}
}