main.cpp Example File

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 #include <QtCore/QStandardPaths>
 #include <QtCore/QStringList>
 #include <QtQml/QQmlContext>
 #include <QtGui/QGuiApplication>
 #include <QtQuick/QQuickItem>
 #include <QtQuick/QQuickView>
 #include "filereader.h"
 #include "trace.h"

 #ifdef PERFORMANCEMONITOR_SUPPORT
 #include "performancemonitordeclarative.h"
 #endif

 int main(int argc, char *argv[])
 {
     QGuiApplication app(argc, argv);

 #ifdef PERFORMANCEMONITOR_SUPPORT
     PerformanceMonitor::qmlRegisterTypes();
 #endif

     QUrl fileName;
     qreal volume = 0.5;
     QStringList args = app.arguments();
 #ifdef PERFORMANCEMONITOR_SUPPORT
     PerformanceMonitor::State performanceMonitorState;
 #endif
     for (int i = 1; i < args.size(); ++i) {
         const QByteArray arg = args.at(i).toUtf8();
         if (arg.startsWith('-')) {
             if ("-volume" == arg) {
                 if (i + 1 < args.size())
                     volume = 0.01 * args.at(++i).toInt();
                 else
                     qtTrace() << "Option \"-volume\" takes a value";
             }
 #ifdef PERFORMANCEMONITOR_SUPPORT
             else if (performanceMonitorState.parseArgument(arg)) {
                 // Do nothing
             }
 #endif
             else {
                 qtTrace() << "Option" << arg << "ignored";
             }
         } else {
             if (fileName.isEmpty())
                 fileName = QUrl::fromLocalFile(arg);
             else
                 qtTrace() << "Argument" << arg << "ignored";
         }
     }

     QQuickView viewer;

     viewer.setSource(QUrl(QLatin1String("qrc:///qml/qmlvideofx/Main.qml")));
     QQuickItem *rootObject = viewer.rootObject();
     rootObject->setProperty("fileName", fileName);
     viewer.rootObject()->setProperty("volume", volume);

 #ifdef PERFORMANCEMONITOR_SUPPORT
     if (performanceMonitorState.valid) {
         rootObject->setProperty("perfMonitorsLogging", performanceMonitorState.logging);
         rootObject->setProperty("perfMonitorsVisible", performanceMonitorState.visible);
     }
     QObject::connect(&viewer, SIGNAL(afterRendering()),
                      rootObject, SLOT(qmlFramePainted()));
 #endif

     FileReader fileReader;
     viewer.rootContext()->setContextProperty("fileReader", &fileReader);

     const QUrl appPath(QUrl::fromLocalFile(app.applicationDirPath()));
     const QStringList picturesLocation = QStandardPaths::standardLocations(QStandardPaths::PicturesLocation);
     const QUrl imagePath = picturesLocation.isEmpty() ? appPath : QUrl::fromLocalFile(picturesLocation.first());
     viewer.rootContext()->setContextProperty("imagePath", imagePath);

     const QStringList moviesLocation = QStandardPaths::standardLocations(QStandardPaths::MoviesLocation);
     const QUrl videoPath = moviesLocation.isEmpty() ? appPath : QUrl::fromLocalFile(moviesLocation.first());
     viewer.rootContext()->setContextProperty("videoPath", videoPath);

     viewer.setTitle("qmlvideofx");
     viewer.setFlags(Qt::Window | Qt::WindowSystemMenuHint | Qt::WindowTitleHint |
                           Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
     viewer.setMinimumSize(QSize(1280, 720));
     viewer.setResizeMode(QQuickView::SizeRootObjectToView);

     viewer.show();

     // Delay invocation of init until the event loop has started, to work around
     // a GL context issue on Harmattan: without this, we get the following error
     // when the first ShaderEffectItem is created:
     // "QGLShaderProgram::addShader: Program and shader are not associated with same context"
     QMetaObject::invokeMethod(viewer.rootObject(), "init", Qt::QueuedConnection);

     return app.exec();
 }