<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>main.cpp Example File | Qt Multimedia 5.9</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.9</td><td ><a href="qtmultimedia-index.html">Qt Multimedia</a></td><td ><a href="qtmultimedia-multimedia-video-qmlvideo-example.html">QML Video Example</a></td><td >main.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">main.cpp Example File</h1> <span class="subtitle">multimedia/video/qmlvideo/main.cpp</span> <!-- $$$multimedia/video/qmlvideo/main.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the Qt Mobility Components. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QtCore/QStandardPaths></span> <span class="preprocessor">#include <QtCore/QString></span> <span class="preprocessor">#include <QtCore/QStringList></span> <span class="preprocessor">#include <QtQml/QQmlContext></span> <span class="preprocessor">#include <QtQml/QQmlEngine></span> <span class="preprocessor">#include <QtGui/QGuiApplication></span> <span class="preprocessor">#include <QtQuick/QQuickItem></span> <span class="preprocessor">#include <QtQuick/QQuickView></span> <span class="preprocessor">#include "trace.h"</span> <span class="preprocessor">#ifdef PERFORMANCEMONITOR_SUPPORT</span> <span class="preprocessor">#include "performancemonitordeclarative.h"</span> <span class="preprocessor">#endif</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="type">QString</span> DefaultFileName1 <span class="operator">=</span> <span class="string">""</span>; <span class="keyword">static</span> <span class="keyword">const</span> <span class="type">QString</span> DefaultFileName2 <span class="operator">=</span> <span class="string">""</span>; <span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>) { <span class="type">QGuiApplication</span> app(argc<span class="operator">,</span> argv); <span class="preprocessor">#ifdef PERFORMANCEMONITOR_SUPPORT</span> PerformanceMonitor<span class="operator">::</span>qmlRegisterTypes(); <span class="preprocessor">#endif</span> <span class="type">QString</span> source1<span class="operator">,</span> source2; <span class="type">qreal</span> volume <span class="operator">=</span> <span class="number">0.5</span>; <span class="type">QStringList</span> args <span class="operator">=</span> app<span class="operator">.</span>arguments(); <span class="preprocessor">#ifdef PERFORMANCEMONITOR_SUPPORT</span> PerformanceMonitor<span class="operator">::</span>State performanceMonitorState; <span class="preprocessor">#endif</span> bool sourceIsUrl <span class="operator">=</span> <span class="keyword">false</span>; <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">1</span>; i <span class="operator"><</span> args<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">const</span> <span class="type">QByteArray</span> arg <span class="operator">=</span> args<span class="operator">.</span>at(i)<span class="operator">.</span>toUtf8(); <span class="keyword">if</span> (arg<span class="operator">.</span>startsWith(<span class="char">'-'</span>)) { <span class="keyword">if</span> (<span class="string">"-volume"</span> <span class="operator">=</span><span class="operator">=</span> arg) { <span class="keyword">if</span> (i<span class="operator">+</span><span class="number">1</span> <span class="operator"><</span> args<span class="operator">.</span>count()) volume <span class="operator">=</span> <span class="number">0.01</span> <span class="operator">*</span> args<span class="operator">.</span>at(<span class="operator">+</span><span class="operator">+</span>i)<span class="operator">.</span>toInt(); <span class="keyword">else</span> qtTrace() <span class="operator"><</span><span class="operator"><</span> <span class="string">"Option \"-volume\" takes a value"</span>; } <span class="preprocessor">#ifdef PERFORMANCEMONITOR_SUPPORT</span> <span class="keyword">else</span> <span class="keyword">if</span> (performanceMonitorState<span class="operator">.</span>parseArgument(arg)) { <span class="comment">// Do nothing</span> } <span class="preprocessor">#endif</span> <span class="keyword">else</span> <span class="keyword">if</span> (<span class="string">"-url"</span> <span class="operator">=</span><span class="operator">=</span> arg) { sourceIsUrl <span class="operator">=</span> <span class="keyword">true</span>; } <span class="keyword">else</span> { qtTrace() <span class="operator"><</span><span class="operator"><</span> <span class="string">"Option"</span> <span class="operator"><</span><span class="operator"><</span> arg <span class="operator"><</span><span class="operator"><</span> <span class="string">"ignored"</span>; } } <span class="keyword">else</span> { <span class="keyword">if</span> (source1<span class="operator">.</span>isEmpty()) source1 <span class="operator">=</span> arg; <span class="keyword">else</span> <span class="keyword">if</span> (source2<span class="operator">.</span>isEmpty()) source2 <span class="operator">=</span> arg; <span class="keyword">else</span> qtTrace() <span class="operator"><</span><span class="operator"><</span> <span class="string">"Argument"</span> <span class="operator"><</span><span class="operator"><</span> arg <span class="operator"><</span><span class="operator"><</span> <span class="string">"ignored"</span>; } } <span class="type">QUrl</span> url1<span class="operator">,</span> url2; <span class="keyword">if</span> (sourceIsUrl) { url1 <span class="operator">=</span> source1; url2 <span class="operator">=</span> source2; } <span class="keyword">else</span> { <span class="keyword">if</span> (<span class="operator">!</span>source1<span class="operator">.</span>isEmpty()) url1 <span class="operator">=</span> <span class="type">QUrl</span><span class="operator">::</span>fromLocalFile(source1); <span class="keyword">if</span> (<span class="operator">!</span>source2<span class="operator">.</span>isEmpty()) url2 <span class="operator">=</span> <span class="type">QUrl</span><span class="operator">::</span>fromLocalFile(source2); } <span class="type">QQuickView</span> viewer; viewer<span class="operator">.</span>setSource(<span class="type">QUrl</span>(<span class="string">"qrc:///qml/qmlvideo/main.qml"</span>)); <span class="type">QObject</span><span class="operator">::</span>connect(viewer<span class="operator">.</span>engine()<span class="operator">,</span> SIGNAL(quit())<span class="operator">,</span> <span class="operator">&</span>viewer<span class="operator">,</span> SLOT(close())); <span class="type">QQuickItem</span> <span class="operator">*</span>rootObject <span class="operator">=</span> viewer<span class="operator">.</span>rootObject(); rootObject<span class="operator">-</span><span class="operator">></span>setProperty(<span class="string">"source1"</span><span class="operator">,</span> url1); rootObject<span class="operator">-</span><span class="operator">></span>setProperty(<span class="string">"source2"</span><span class="operator">,</span> url2); rootObject<span class="operator">-</span><span class="operator">></span>setProperty(<span class="string">"volume"</span><span class="operator">,</span> volume); <span class="preprocessor">#ifdef PERFORMANCEMONITOR_SUPPORT</span> <span class="keyword">if</span> (performanceMonitorState<span class="operator">.</span>valid) { rootObject<span class="operator">-</span><span class="operator">></span>setProperty(<span class="string">"perfMonitorsLogging"</span><span class="operator">,</span> performanceMonitorState<span class="operator">.</span>logging); rootObject<span class="operator">-</span><span class="operator">></span>setProperty(<span class="string">"perfMonitorsVisible"</span><span class="operator">,</span> performanceMonitorState<span class="operator">.</span>visible); } <span class="type">QObject</span><span class="operator">::</span>connect(<span class="operator">&</span>viewer<span class="operator">,</span> SIGNAL(afterRendering())<span class="operator">,</span> rootObject<span class="operator">,</span> SLOT(qmlFramePainted())); <span class="preprocessor">#endif</span> <span class="keyword">const</span> <span class="type">QStringList</span> moviesLocation <span class="operator">=</span> <span class="type">QStandardPaths</span><span class="operator">::</span>standardLocations(<span class="type">QStandardPaths</span><span class="operator">::</span>MoviesLocation); <span class="keyword">const</span> <span class="type">QUrl</span> videoPath <span class="operator">=</span> <span class="type">QUrl</span><span class="operator">::</span>fromLocalFile(moviesLocation<span class="operator">.</span>isEmpty() <span class="operator">?</span> app<span class="operator">.</span>applicationDirPath() : moviesLocation<span class="operator">.</span>front()); viewer<span class="operator">.</span>rootContext()<span class="operator">-</span><span class="operator">></span>setContextProperty(<span class="string">"videoPath"</span><span class="operator">,</span> videoPath); <span class="type">QMetaObject</span><span class="operator">::</span>invokeMethod(rootObject<span class="operator">,</span> <span class="string">"init"</span>); viewer<span class="operator">.</span>setMinimumSize(<span class="type">QSize</span>(<span class="number">640</span><span class="operator">,</span> <span class="number">360</span>)); viewer<span class="operator">.</span>show(); <span class="keyword">return</span> app<span class="operator">.</span>exec(); } </pre> </div> <!-- @@@multimedia/video/qmlvideo/main.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>