main.cpp 范例文件

multimedia/video/qmlvideo/main.cpp
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#include <QtCore/QStandardPaths> #include <QtCore/QString> #include <QtCore/QStringList> #include <QtQml/QQmlContext> #include <QtQml/QQmlEngine> #include <QtGui/QGuiApplication> #include <QtQuick/QQuickItem> #include <QtQuick/QQuickView> #include "trace.h" #ifdef PERFORMANCEMONITOR_SUPPORT #include "performancemonitordeclarative.h" #endif static const QString DefaultFileName1 = ""; static const QString DefaultFileName2 = ""; int main(int argc, char *argv[]) { QGuiApplication app(argc, argv); #ifdef PERFORMANCEMONITOR_SUPPORT PerformanceMonitor::qmlRegisterTypes(); #endif QString source1, source2; qreal volume = 0.5; QStringList args = app.arguments(); #ifdef PERFORMANCEMONITOR_SUPPORT PerformanceMonitor::State performanceMonitorState; #endif bool sourceIsUrl = false; 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.count()) 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 if ("-url" == arg) { sourceIsUrl = true; } else { qtTrace() << "Option" << arg << "ignored"; } } else { if (source1.isEmpty()) source1 = arg; else if (source2.isEmpty()) source2 = arg; else qtTrace() << "Argument" << arg << "ignored"; } } QUrl url1, url2; if (sourceIsUrl) { url1 = source1; url2 = source2; } else { if (!source1.isEmpty()) url1 = QUrl::fromLocalFile(source1); if (!source2.isEmpty()) url2 = QUrl::fromLocalFile(source2); } QQuickView viewer; viewer.setSource(QUrl("qrc:///qml/qmlvideo/main.qml")); QObject::connect(viewer.engine(), &QQmlEngine::quit, &viewer, &QQuickView::close); QQuickItem *rootObject = viewer.rootObject(); rootObject->setProperty("source1", url1); rootObject->setProperty("source2", url2); 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 const QStringList moviesLocation = QStandardPaths::standardLocations(QStandardPaths::MoviesLocation); const QUrl videoPath = QUrl::fromLocalFile(moviesLocation.isEmpty() ? app.applicationDirPath() : moviesLocation.front()); viewer.rootContext()->setContextProperty("videoPath", videoPath); QMetaObject::invokeMethod(rootObject, "init"); viewer.setMinimumSize(QSize(640, 360)); viewer.show(); return app.exec(); }