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     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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    40 ****************************************************************************/

    41 

    42 #include "videoplayer.h"

    43 

    44 #include "videowidget.h"

    45 

    46 #include <QtGui>

    47 #include <qvideosurfaceformat.h>

    48 

    49 VideoPlayer::VideoPlayer(QWidget *parent)

    50     : QWidget(parent)

    51     , surface(0)

    52     , playButton(0)

    53     , positionSlider(0)

    54 {

    55     connect(&movie, SIGNAL(stateChanged(QMovie::MovieState)),

    56             this, SLOT(movieStateChanged(QMovie::MovieState)));

    57     connect(&movie, SIGNAL(frameChanged(int)),

    58             this, SLOT(frameChanged(int)));

    59 

    60     VideoWidget *videoWidget = new VideoWidget;

    61     surface = videoWidget->videoSurface();

    62 

    63     QAbstractButton *openButton = new QPushButton(tr("Open..."));

    64     connect(openButton, SIGNAL(clicked()), this, SLOT(openFile()));

    65 

    66     playButton = new QPushButton;

    67     playButton->setEnabled(false);

    68     playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));

    69 

    70     connect(playButton, SIGNAL(clicked()),

    71             this, SLOT(play()));

    72 

    73     positionSlider = new QSlider(Qt::Horizontal);

    74     positionSlider->setRange(0, 0);

    75 

    76     connect(positionSlider, SIGNAL(sliderMoved(int)),

    77             this, SLOT(setPosition(int)));

    78 

    79     connect(&movie, SIGNAL(frameChanged(int)),

    80             positionSlider, SLOT(setValue(int)));

    81 

    82     QBoxLayout *controlLayout = new QHBoxLayout;

    83     controlLayout->setMargin(0);

    84     controlLayout->addWidget(openButton);

    85     controlLayout->addWidget(playButton);

    86     controlLayout->addWidget(positionSlider);

    87 

    88     QBoxLayout *layout = new QVBoxLayout;

    89     layout->addWidget(videoWidget);

    90     layout->addLayout(controlLayout);

    91 

    92     setLayout(layout);

    93 }

    94 

    95 VideoPlayer::~VideoPlayer()

    96 {

    97 }

    98 

    99 void VideoPlayer::openFile()

   100 {

   101     QString fileName = QFileDialog::getOpenFileName(this, tr("Open Movie"));

   102 

   103     if (!fileName.isEmpty()) {

   104         surface->stop();

   105 

   106         movie.setFileName(fileName);

   107 

   108         playButton->setEnabled(true);

   109         positionSlider->setMaximum(movie.frameCount());

   110 

   111         movie.jumpToFrame(0);

   112     }

   113 }

   114 

   115 void VideoPlayer::play()

   116 {

   117     switch(movie.state()) {

   118     case QMovie::NotRunning:

   119         movie.start();

   120         break;

   121     case QMovie::Paused:

   122         movie.setPaused(false);

   123         break;

   124     case QMovie::Running:

   125         movie.setPaused(true);

   126         break;

   127     }

   128 }

   129 

   130 void VideoPlayer::movieStateChanged(QMovie::MovieState state)

   131 {

   132     switch(state) {

   133     case QMovie::NotRunning:

   134     case QMovie::Paused:

   135         playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));

   136         break;

   137     case QMovie::Running:

   138         playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause));

   139         break;

   140     }

   141 }

   142 

   143 void VideoPlayer::frameChanged(int frame)

   144 {

   145     if (!presentImage(movie.currentImage())) {

   146         movie.stop();

   147         playButton->setEnabled(false);

   148         positionSlider->setMaximum(0);

   149     } else {

   150         positionSlider->setValue(frame);

   151     }

   152 }

   153 

   154 void VideoPlayer::setPosition(int frame)

   155 {

   156     movie.jumpToFrame(frame);

   157 }

   158 

   159 bool VideoPlayer::presentImage(const QImage &image)

   160 {

   161     QVideoFrame frame(image);

   162 

   163     if (!frame.isValid())

   164         return false;

   165 

   166     QVideoSurfaceFormat currentFormat = surface->surfaceFormat();

   167 

   168     if (frame.pixelFormat() != currentFormat.pixelFormat()

   169             || frame.size() != currentFormat.frameSize()) {

   170         QVideoSurfaceFormat format(frame.size(), frame.pixelFormat());

   171 

   172         if (!surface->start(format))

   173             return false;

   174     }

   175 

   176     if (!surface->present(frame)) {

   177         surface->stop();

   178 

   179         return false;

   180     } else {

   181         return true;

   182     }

   183 }