Move audio and video examples into the common multimedia directory.

Brings the video examples into multimedia directory, and removes the
audio sub-directory so the directory structure is in line with the other
example categories.

Task-number: QT-667
Reviewed-by: Kurt Korbatits

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;
+    }
+}