<?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>player.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-multimediawidgets-player-example.html">Media Player Example</a></td><td >player.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">player.cpp Example File</h1> <span class="subtitle">multimediawidgets/player/player.cpp</span> <!-- $$$multimediawidgets/player/player.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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 "player.h"</span> <span class="preprocessor">#include "playercontrols.h"</span> <span class="preprocessor">#include "playlistmodel.h"</span> <span class="preprocessor">#include "histogramwidget.h"</span> <span class="preprocessor">#include <QMediaService></span> <span class="preprocessor">#include <QMediaPlaylist></span> <span class="preprocessor">#include <QVideoProbe></span> <span class="preprocessor">#include <QAudioProbe></span> <span class="preprocessor">#include <QMediaMetaData></span> <span class="preprocessor">#include <QtWidgets></span> Player<span class="operator">::</span>Player(<span class="type">QWidget</span> <span class="operator">*</span>parent) : <span class="type">QWidget</span>(parent) <span class="operator">,</span> videoWidget(<span class="number">0</span>) <span class="operator">,</span> coverLabel(<span class="number">0</span>) <span class="operator">,</span> slider(<span class="number">0</span>) <span class="operator">,</span> colorDialog(<span class="number">0</span>) { player <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span>(<span class="keyword">this</span>); <span class="comment">// owned by PlaylistModel</span> playlist <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmediaplaylist.html">QMediaPlaylist</a></span>(); player<span class="operator">-</span><span class="operator">></span>setPlaylist(playlist); connect(player<span class="operator">,</span> SIGNAL(durationChanged(<span class="type">qint64</span>))<span class="operator">,</span> SLOT(durationChanged(<span class="type">qint64</span>))); connect(player<span class="operator">,</span> SIGNAL(positionChanged(<span class="type">qint64</span>))<span class="operator">,</span> SLOT(positionChanged(<span class="type">qint64</span>))); connect(player<span class="operator">,</span> SIGNAL(metaDataChanged())<span class="operator">,</span> SLOT(metaDataChanged())); connect(playlist<span class="operator">,</span> SIGNAL(currentIndexChanged(<span class="type">int</span>))<span class="operator">,</span> SLOT(playlistPositionChanged(<span class="type">int</span>))); connect(player<span class="operator">,</span> SIGNAL(mediaStatusChanged(<span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>MediaStatus))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(statusChanged(<span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>MediaStatus))); connect(player<span class="operator">,</span> SIGNAL(bufferStatusChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(bufferingProgress(<span class="type">int</span>))); connect(player<span class="operator">,</span> SIGNAL(videoAvailableChanged(bool))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(videoAvailableChanged(bool))); connect(player<span class="operator">,</span> SIGNAL(error(<span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>Error))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(displayErrorMessage())); connect(player<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>stateChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Player<span class="operator">::</span>stateChanged); videoWidget <span class="operator">=</span> <span class="keyword">new</span> VideoWidget(<span class="keyword">this</span>); player<span class="operator">-</span><span class="operator">></span>setVideoOutput(videoWidget); playlistModel <span class="operator">=</span> <span class="keyword">new</span> PlaylistModel(<span class="keyword">this</span>); playlistModel<span class="operator">-</span><span class="operator">></span>setPlaylist(playlist); playlistView <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QListView</span>(<span class="keyword">this</span>); playlistView<span class="operator">-</span><span class="operator">></span>setModel(playlistModel); playlistView<span class="operator">-</span><span class="operator">></span>setCurrentIndex(playlistModel<span class="operator">-</span><span class="operator">></span>index(playlist<span class="operator">-</span><span class="operator">></span>currentIndex()<span class="operator">,</span> <span class="number">0</span>)); connect(playlistView<span class="operator">,</span> SIGNAL(activated(<span class="type">QModelIndex</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(jump(<span class="type">QModelIndex</span>))); slider <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QSlider</span>(<span class="type">Qt</span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="keyword">this</span>); slider<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> player<span class="operator">-</span><span class="operator">></span>duration() <span class="operator">/</span> <span class="number">1000</span>); labelDuration <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QLabel</span>(<span class="keyword">this</span>); connect(slider<span class="operator">,</span> SIGNAL(sliderMoved(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(seek(<span class="type">int</span>))); labelHistogram <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QLabel</span>(<span class="keyword">this</span>); labelHistogram<span class="operator">-</span><span class="operator">></span>setText(<span class="string">"Histogram:"</span>); videoHistogram <span class="operator">=</span> <span class="keyword">new</span> HistogramWidget(<span class="keyword">this</span>); audioHistogram <span class="operator">=</span> <span class="keyword">new</span> HistogramWidget(<span class="keyword">this</span>); <span class="type">QHBoxLayout</span> <span class="operator">*</span>histogramLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QHBoxLayout</span>; histogramLayout<span class="operator">-</span><span class="operator">></span>addWidget(labelHistogram); histogramLayout<span class="operator">-</span><span class="operator">></span>addWidget(videoHistogram<span class="operator">,</span> <span class="number">1</span>); histogramLayout<span class="operator">-</span><span class="operator">></span>addWidget(audioHistogram<span class="operator">,</span> <span class="number">2</span>); videoProbe <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvideoprobe.html">QVideoProbe</a></span>(<span class="keyword">this</span>); connect(videoProbe<span class="operator">,</span> SIGNAL(videoFrameProbed(<span class="type"><a href="qvideoframe.html">QVideoFrame</a></span>))<span class="operator">,</span> videoHistogram<span class="operator">,</span> SLOT(processFrame(<span class="type"><a href="qvideoframe.html">QVideoFrame</a></span>))); videoProbe<span class="operator">-</span><span class="operator">></span>setSource(player); audioProbe <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaudioprobe.html">QAudioProbe</a></span>(<span class="keyword">this</span>); connect(audioProbe<span class="operator">,</span> SIGNAL(audioBufferProbed(<span class="type"><a href="qaudiobuffer.html">QAudioBuffer</a></span>))<span class="operator">,</span> audioHistogram<span class="operator">,</span> SLOT(processBuffer(<span class="type"><a href="qaudiobuffer.html">QAudioBuffer</a></span>))); audioProbe<span class="operator">-</span><span class="operator">></span>setSource(player); <span class="type">QPushButton</span> <span class="operator">*</span>openButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QPushButton</span>(tr(<span class="string">"Open"</span>)<span class="operator">,</span> <span class="keyword">this</span>); connect(openButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(open())); PlayerControls <span class="operator">*</span>controls <span class="operator">=</span> <span class="keyword">new</span> PlayerControls(<span class="keyword">this</span>); controls<span class="operator">-</span><span class="operator">></span>setState(player<span class="operator">-</span><span class="operator">></span>state()); controls<span class="operator">-</span><span class="operator">></span>setVolume(player<span class="operator">-</span><span class="operator">></span>volume()); controls<span class="operator">-</span><span class="operator">></span>setMuted(controls<span class="operator">-</span><span class="operator">></span>isMuted()); connect(controls<span class="operator">,</span> SIGNAL(play())<span class="operator">,</span> player<span class="operator">,</span> SLOT(play())); connect(controls<span class="operator">,</span> SIGNAL(pause())<span class="operator">,</span> player<span class="operator">,</span> SLOT(pause())); connect(controls<span class="operator">,</span> SIGNAL(stop())<span class="operator">,</span> player<span class="operator">,</span> SLOT(stop())); connect(controls<span class="operator">,</span> SIGNAL(next())<span class="operator">,</span> playlist<span class="operator">,</span> SLOT(next())); connect(controls<span class="operator">,</span> SIGNAL(previous())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(previousClicked())); connect(controls<span class="operator">,</span> SIGNAL(changeVolume(<span class="type">int</span>))<span class="operator">,</span> player<span class="operator">,</span> SLOT(setVolume(<span class="type">int</span>))); connect(controls<span class="operator">,</span> SIGNAL(changeMuting(bool))<span class="operator">,</span> player<span class="operator">,</span> SLOT(setMuted(bool))); connect(controls<span class="operator">,</span> SIGNAL(changeRate(<span class="type">qreal</span>))<span class="operator">,</span> player<span class="operator">,</span> SLOT(setPlaybackRate(<span class="type">qreal</span>))); connect(controls<span class="operator">,</span> SIGNAL(stop())<span class="operator">,</span> videoWidget<span class="operator">,</span> SLOT(update())); connect(player<span class="operator">,</span> SIGNAL(stateChanged(<span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>State))<span class="operator">,</span> controls<span class="operator">,</span> SLOT(setState(<span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>State))); connect(player<span class="operator">,</span> SIGNAL(volumeChanged(<span class="type">int</span>))<span class="operator">,</span> controls<span class="operator">,</span> SLOT(setVolume(<span class="type">int</span>))); connect(player<span class="operator">,</span> SIGNAL(mutedChanged(bool))<span class="operator">,</span> controls<span class="operator">,</span> SLOT(setMuted(bool))); fullScreenButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QPushButton</span>(tr(<span class="string">"FullScreen"</span>)<span class="operator">,</span> <span class="keyword">this</span>); fullScreenButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); colorButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QPushButton</span>(tr(<span class="string">"Color Options..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); colorButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); connect(colorButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(showColorDialog())); <span class="type">QBoxLayout</span> <span class="operator">*</span>displayLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QHBoxLayout</span>; displayLayout<span class="operator">-</span><span class="operator">></span>addWidget(videoWidget<span class="operator">,</span> <span class="number">2</span>); displayLayout<span class="operator">-</span><span class="operator">></span>addWidget(playlistView); <span class="type">QBoxLayout</span> <span class="operator">*</span>controlLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QHBoxLayout</span>; controlLayout<span class="operator">-</span><span class="operator">></span>setMargin(<span class="number">0</span>); controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(openButton); controlLayout<span class="operator">-</span><span class="operator">></span>addStretch(<span class="number">1</span>); controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(controls); controlLayout<span class="operator">-</span><span class="operator">></span>addStretch(<span class="number">1</span>); controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(fullScreenButton); controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(colorButton); <span class="type">QBoxLayout</span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QVBoxLayout</span>; layout<span class="operator">-</span><span class="operator">></span>addLayout(displayLayout); <span class="type">QHBoxLayout</span> <span class="operator">*</span>hLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QHBoxLayout</span>; hLayout<span class="operator">-</span><span class="operator">></span>addWidget(slider); hLayout<span class="operator">-</span><span class="operator">></span>addWidget(labelDuration); layout<span class="operator">-</span><span class="operator">></span>addLayout(hLayout); layout<span class="operator">-</span><span class="operator">></span>addLayout(controlLayout); layout<span class="operator">-</span><span class="operator">></span>addLayout(histogramLayout); setLayout(layout); <span class="keyword">if</span> (<span class="operator">!</span>isPlayerAvailable()) { <span class="type">QMessageBox</span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Service not available"</span>)<span class="operator">,</span> tr(<span class="string">"The QMediaPlayer object does not have a valid service.\n"</span>\ <span class="string">"Please check the media service plugins are installed."</span>)); controls<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); playlistView<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); openButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); colorButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); fullScreenButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); } metaDataChanged(); } Player<span class="operator">::</span><span class="operator">~</span>Player() { } bool Player<span class="operator">::</span>isPlayerAvailable() <span class="keyword">const</span> { <span class="keyword">return</span> player<span class="operator">-</span><span class="operator">></span>isAvailable(); } <span class="type">void</span> Player<span class="operator">::</span>open() { <span class="type">QFileDialog</span> fileDialog(<span class="keyword">this</span>); fileDialog<span class="operator">.</span>setAcceptMode(<span class="type">QFileDialog</span><span class="operator">::</span>AcceptOpen); fileDialog<span class="operator">.</span>setWindowTitle(tr(<span class="string">"Open Files"</span>)); <span class="type">QStringList</span> supportedMimeTypes <span class="operator">=</span> player<span class="operator">-</span><span class="operator">></span>supportedMimeTypes(); <span class="keyword">if</span> (<span class="operator">!</span>supportedMimeTypes<span class="operator">.</span>isEmpty()) { supportedMimeTypes<span class="operator">.</span>append(<span class="string">"audio/x-m3u"</span>); <span class="comment">// MP3 playlists</span> fileDialog<span class="operator">.</span>setMimeTypeFilters(supportedMimeTypes); } fileDialog<span class="operator">.</span>setDirectory(<span class="type">QStandardPaths</span><span class="operator">::</span>standardLocations(<span class="type">QStandardPaths</span><span class="operator">::</span>MoviesLocation)<span class="operator">.</span>value(<span class="number">0</span><span class="operator">,</span> <span class="type">QDir</span><span class="operator">::</span>homePath())); <span class="keyword">if</span> (fileDialog<span class="operator">.</span>exec() <span class="operator">=</span><span class="operator">=</span> <span class="type">QDialog</span><span class="operator">::</span>Accepted) addToPlaylist(fileDialog<span class="operator">.</span>selectedUrls()); } <span class="keyword">static</span> bool isPlaylist(<span class="keyword">const</span> <span class="type">QUrl</span> <span class="operator">&</span>url) <span class="comment">// Check for ".m3u" playlists.</span> { <span class="keyword">if</span> (<span class="operator">!</span>url<span class="operator">.</span>isLocalFile()) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="keyword">const</span> <span class="type">QFileInfo</span> fileInfo(url<span class="operator">.</span>toLocalFile()); <span class="keyword">return</span> fileInfo<span class="operator">.</span>exists() <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>fileInfo<span class="operator">.</span>suffix()<span class="operator">.</span>compare(QLatin1String(<span class="string">"m3u"</span>)<span class="operator">,</span> <span class="type">Qt</span><span class="operator">::</span>CaseInsensitive); } <span class="type">void</span> Player<span class="operator">::</span>addToPlaylist(<span class="keyword">const</span> <span class="type">QList</span><span class="operator"><</span><span class="type">QUrl</span><span class="operator">></span> urls) { foreach (<span class="keyword">const</span> <span class="type">QUrl</span> <span class="operator">&</span>url<span class="operator">,</span> urls) { <span class="keyword">if</span> (isPlaylist(url)) playlist<span class="operator">-</span><span class="operator">></span>load(url); <span class="keyword">else</span> playlist<span class="operator">-</span><span class="operator">></span>addMedia(url); } } <span class="type">void</span> Player<span class="operator">::</span>durationChanged(<span class="type">qint64</span> duration) { <span class="keyword">this</span><span class="operator">-</span><span class="operator">></span>duration <span class="operator">=</span> duration<span class="operator">/</span><span class="number">1000</span>; slider<span class="operator">-</span><span class="operator">></span>setMaximum(duration <span class="operator">/</span> <span class="number">1000</span>); } <span class="type">void</span> Player<span class="operator">::</span>positionChanged(<span class="type">qint64</span> progress) { <span class="keyword">if</span> (<span class="operator">!</span>slider<span class="operator">-</span><span class="operator">></span>isSliderDown()) { slider<span class="operator">-</span><span class="operator">></span>setValue(progress <span class="operator">/</span> <span class="number">1000</span>); } updateDurationInfo(progress <span class="operator">/</span> <span class="number">1000</span>); } <span class="type">void</span> Player<span class="operator">::</span>metaDataChanged() { <span class="keyword">if</span> (player<span class="operator">-</span><span class="operator">></span>isMetaDataAvailable()) { setTrackInfo(<span class="type">QString</span>(<span class="string">"%1 - %2"</span>) <span class="operator">.</span>arg(player<span class="operator">-</span><span class="operator">></span>metaData(<span class="type"><a href="qmediametadata.html">QMediaMetaData</a></span><span class="operator">::</span>AlbumArtist)<span class="operator">.</span>toString()) <span class="operator">.</span>arg(player<span class="operator">-</span><span class="operator">></span>metaData(<span class="type"><a href="qmediametadata.html">QMediaMetaData</a></span><span class="operator">::</span>Title)<span class="operator">.</span>toString())); <span class="keyword">if</span> (coverLabel) { <span class="type">QUrl</span> url <span class="operator">=</span> player<span class="operator">-</span><span class="operator">></span>metaData(<span class="type"><a href="qmediametadata.html">QMediaMetaData</a></span><span class="operator">::</span>CoverArtUrlLarge)<span class="operator">.</span>value<span class="operator"><</span><span class="type">QUrl</span><span class="operator">></span>(); coverLabel<span class="operator">-</span><span class="operator">></span>setPixmap(<span class="operator">!</span>url<span class="operator">.</span>isEmpty() <span class="operator">?</span> <span class="type">QPixmap</span>(url<span class="operator">.</span>toString()) : <span class="type">QPixmap</span>()); } } } <span class="type">void</span> Player<span class="operator">::</span>previousClicked() { <span class="comment">// Go to previous track if we are within the first 5 seconds of playback</span> <span class="comment">// Otherwise, seek to the beginning.</span> <span class="keyword">if</span>(player<span class="operator">-</span><span class="operator">></span>position() <span class="operator"><</span><span class="operator">=</span> <span class="number">5000</span>) playlist<span class="operator">-</span><span class="operator">></span>previous(); <span class="keyword">else</span> player<span class="operator">-</span><span class="operator">></span>setPosition(<span class="number">0</span>); } <span class="type">void</span> Player<span class="operator">::</span>jump(<span class="keyword">const</span> <span class="type">QModelIndex</span> <span class="operator">&</span>index) { <span class="keyword">if</span> (index<span class="operator">.</span>isValid()) { playlist<span class="operator">-</span><span class="operator">></span>setCurrentIndex(index<span class="operator">.</span>row()); player<span class="operator">-</span><span class="operator">></span>play(); } } <span class="type">void</span> Player<span class="operator">::</span>playlistPositionChanged(<span class="type">int</span> currentItem) { clearHistogram(); playlistView<span class="operator">-</span><span class="operator">></span>setCurrentIndex(playlistModel<span class="operator">-</span><span class="operator">></span>index(currentItem<span class="operator">,</span> <span class="number">0</span>)); } <span class="type">void</span> Player<span class="operator">::</span>seek(<span class="type">int</span> seconds) { player<span class="operator">-</span><span class="operator">></span>setPosition(seconds <span class="operator">*</span> <span class="number">1000</span>); } <span class="type">void</span> Player<span class="operator">::</span>statusChanged(<span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>MediaStatus status) { handleCursor(status); <span class="comment">// handle status message</span> <span class="keyword">switch</span> (status) { <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>UnknownMediaStatus: <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>NoMedia: <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>LoadedMedia: <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>BufferingMedia: <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>BufferedMedia: setStatusInfo(<span class="type">QString</span>()); <span class="keyword">break</span>; <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>LoadingMedia: setStatusInfo(tr(<span class="string">"Loading..."</span>)); <span class="keyword">break</span>; <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>StalledMedia: setStatusInfo(tr(<span class="string">"Media Stalled"</span>)); <span class="keyword">break</span>; <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>EndOfMedia: <span class="type">QApplication</span><span class="operator">::</span>alert(<span class="keyword">this</span>); <span class="keyword">break</span>; <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>InvalidMedia: displayErrorMessage(); <span class="keyword">break</span>; } } <span class="type">void</span> Player<span class="operator">::</span>stateChanged(<span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>State state) { <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>StoppedState) clearHistogram(); } <span class="type">void</span> Player<span class="operator">::</span>handleCursor(<span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>MediaStatus status) { <span class="preprocessor">#ifndef QT_NO_CURSOR</span> <span class="keyword">if</span> (status <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>LoadingMedia <span class="operator">|</span><span class="operator">|</span> status <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>BufferingMedia <span class="operator">|</span><span class="operator">|</span> status <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>StalledMedia) setCursor(<span class="type">QCursor</span>(<span class="type">Qt</span><span class="operator">::</span>BusyCursor)); <span class="keyword">else</span> unsetCursor(); <span class="preprocessor">#endif</span> } <span class="type">void</span> Player<span class="operator">::</span>bufferingProgress(<span class="type">int</span> progress) { setStatusInfo(tr(<span class="string">"Buffering %4%"</span>)<span class="operator">.</span>arg(progress)); } <span class="type">void</span> Player<span class="operator">::</span>videoAvailableChanged(bool available) { <span class="keyword">if</span> (<span class="operator">!</span>available) { disconnect(fullScreenButton<span class="operator">,</span> SIGNAL(clicked(bool))<span class="operator">,</span> videoWidget<span class="operator">,</span> SLOT(setFullScreen(bool))); disconnect(videoWidget<span class="operator">,</span> SIGNAL(fullScreenChanged(bool))<span class="operator">,</span> fullScreenButton<span class="operator">,</span> SLOT(setChecked(bool))); videoWidget<span class="operator">-</span><span class="operator">></span>setFullScreen(<span class="keyword">false</span>); } <span class="keyword">else</span> { connect(fullScreenButton<span class="operator">,</span> SIGNAL(clicked(bool))<span class="operator">,</span> videoWidget<span class="operator">,</span> SLOT(setFullScreen(bool))); connect(videoWidget<span class="operator">,</span> SIGNAL(fullScreenChanged(bool))<span class="operator">,</span> fullScreenButton<span class="operator">,</span> SLOT(setChecked(bool))); <span class="keyword">if</span> (fullScreenButton<span class="operator">-</span><span class="operator">></span>isChecked()) videoWidget<span class="operator">-</span><span class="operator">></span>setFullScreen(<span class="keyword">true</span>); } colorButton<span class="operator">-</span><span class="operator">></span>setEnabled(available); } <span class="type">void</span> Player<span class="operator">::</span>setTrackInfo(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>info) { trackInfo <span class="operator">=</span> info; <span class="keyword">if</span> (<span class="operator">!</span>statusInfo<span class="operator">.</span>isEmpty()) setWindowTitle(<span class="type">QString</span>(<span class="string">"%1 | %2"</span>)<span class="operator">.</span>arg(trackInfo)<span class="operator">.</span>arg(statusInfo)); <span class="keyword">else</span> setWindowTitle(trackInfo); } <span class="type">void</span> Player<span class="operator">::</span>setStatusInfo(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>info) { statusInfo <span class="operator">=</span> info; <span class="keyword">if</span> (<span class="operator">!</span>statusInfo<span class="operator">.</span>isEmpty()) setWindowTitle(<span class="type">QString</span>(<span class="string">"%1 | %2"</span>)<span class="operator">.</span>arg(trackInfo)<span class="operator">.</span>arg(statusInfo)); <span class="keyword">else</span> setWindowTitle(trackInfo); } <span class="type">void</span> Player<span class="operator">::</span>displayErrorMessage() { setStatusInfo(player<span class="operator">-</span><span class="operator">></span>errorString()); } <span class="type">void</span> Player<span class="operator">::</span>updateDurationInfo(<span class="type">qint64</span> currentInfo) { <span class="type">QString</span> tStr; <span class="keyword">if</span> (currentInfo <span class="operator">|</span><span class="operator">|</span> duration) { <span class="type">QTime</span> currentTime((currentInfo<span class="operator">/</span><span class="number">3600</span>)<span class="operator">%</span><span class="number">60</span><span class="operator">,</span> (currentInfo<span class="operator">/</span><span class="number">60</span>)<span class="operator">%</span><span class="number">60</span><span class="operator">,</span> currentInfo<span class="operator">%</span><span class="number">60</span><span class="operator">,</span> (currentInfo<span class="operator">*</span><span class="number">1000</span>)<span class="operator">%</span><span class="number">1000</span>); <span class="type">QTime</span> totalTime((duration<span class="operator">/</span><span class="number">3600</span>)<span class="operator">%</span><span class="number">60</span><span class="operator">,</span> (duration<span class="operator">/</span><span class="number">60</span>)<span class="operator">%</span><span class="number">60</span><span class="operator">,</span> duration<span class="operator">%</span><span class="number">60</span><span class="operator">,</span> (duration<span class="operator">*</span><span class="number">1000</span>)<span class="operator">%</span><span class="number">1000</span>); <span class="type">QString</span> format <span class="operator">=</span> <span class="string">"mm:ss"</span>; <span class="keyword">if</span> (duration <span class="operator">></span> <span class="number">3600</span>) format <span class="operator">=</span> <span class="string">"hh:mm:ss"</span>; tStr <span class="operator">=</span> currentTime<span class="operator">.</span>toString(format) <span class="operator">+</span> <span class="string">" / "</span> <span class="operator">+</span> totalTime<span class="operator">.</span>toString(format); } labelDuration<span class="operator">-</span><span class="operator">></span>setText(tStr); } <span class="type">void</span> Player<span class="operator">::</span>showColorDialog() { <span class="keyword">if</span> (<span class="operator">!</span>colorDialog) { <span class="type">QSlider</span> <span class="operator">*</span>brightnessSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QSlider</span>(<span class="type">Qt</span><span class="operator">::</span>Horizontal); brightnessSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="operator">-</span><span class="number">100</span><span class="operator">,</span> <span class="number">100</span>); brightnessSlider<span class="operator">-</span><span class="operator">></span>setValue(videoWidget<span class="operator">-</span><span class="operator">></span>brightness()); connect(brightnessSlider<span class="operator">,</span> SIGNAL(sliderMoved(<span class="type">int</span>))<span class="operator">,</span> videoWidget<span class="operator">,</span> SLOT(setBrightness(<span class="type">int</span>))); connect(videoWidget<span class="operator">,</span> SIGNAL(brightnessChanged(<span class="type">int</span>))<span class="operator">,</span> brightnessSlider<span class="operator">,</span> SLOT(setValue(<span class="type">int</span>))); <span class="type">QSlider</span> <span class="operator">*</span>contrastSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QSlider</span>(<span class="type">Qt</span><span class="operator">::</span>Horizontal); contrastSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="operator">-</span><span class="number">100</span><span class="operator">,</span> <span class="number">100</span>); contrastSlider<span class="operator">-</span><span class="operator">></span>setValue(videoWidget<span class="operator">-</span><span class="operator">></span>contrast()); connect(contrastSlider<span class="operator">,</span> SIGNAL(sliderMoved(<span class="type">int</span>))<span class="operator">,</span> videoWidget<span class="operator">,</span> SLOT(setContrast(<span class="type">int</span>))); connect(videoWidget<span class="operator">,</span> SIGNAL(contrastChanged(<span class="type">int</span>))<span class="operator">,</span> contrastSlider<span class="operator">,</span> SLOT(setValue(<span class="type">int</span>))); <span class="type">QSlider</span> <span class="operator">*</span>hueSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QSlider</span>(<span class="type">Qt</span><span class="operator">::</span>Horizontal); hueSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="operator">-</span><span class="number">100</span><span class="operator">,</span> <span class="number">100</span>); hueSlider<span class="operator">-</span><span class="operator">></span>setValue(videoWidget<span class="operator">-</span><span class="operator">></span>hue()); connect(hueSlider<span class="operator">,</span> SIGNAL(sliderMoved(<span class="type">int</span>))<span class="operator">,</span> videoWidget<span class="operator">,</span> SLOT(setHue(<span class="type">int</span>))); connect(videoWidget<span class="operator">,</span> SIGNAL(hueChanged(<span class="type">int</span>))<span class="operator">,</span> hueSlider<span class="operator">,</span> SLOT(setValue(<span class="type">int</span>))); <span class="type">QSlider</span> <span class="operator">*</span>saturationSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QSlider</span>(<span class="type">Qt</span><span class="operator">::</span>Horizontal); saturationSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="operator">-</span><span class="number">100</span><span class="operator">,</span> <span class="number">100</span>); saturationSlider<span class="operator">-</span><span class="operator">></span>setValue(videoWidget<span class="operator">-</span><span class="operator">></span>saturation()); connect(saturationSlider<span class="operator">,</span> SIGNAL(sliderMoved(<span class="type">int</span>))<span class="operator">,</span> videoWidget<span class="operator">,</span> SLOT(setSaturation(<span class="type">int</span>))); connect(videoWidget<span class="operator">,</span> SIGNAL(saturationChanged(<span class="type">int</span>))<span class="operator">,</span> saturationSlider<span class="operator">,</span> SLOT(setValue(<span class="type">int</span>))); <span class="type">QFormLayout</span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QFormLayout</span>; layout<span class="operator">-</span><span class="operator">></span>addRow(tr(<span class="string">"Brightness"</span>)<span class="operator">,</span> brightnessSlider); layout<span class="operator">-</span><span class="operator">></span>addRow(tr(<span class="string">"Contrast"</span>)<span class="operator">,</span> contrastSlider); layout<span class="operator">-</span><span class="operator">></span>addRow(tr(<span class="string">"Hue"</span>)<span class="operator">,</span> hueSlider); layout<span class="operator">-</span><span class="operator">></span>addRow(tr(<span class="string">"Saturation"</span>)<span class="operator">,</span> saturationSlider); <span class="type">QPushButton</span> <span class="operator">*</span>button <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QPushButton</span>(tr(<span class="string">"Close"</span>)); layout<span class="operator">-</span><span class="operator">></span>addRow(button); colorDialog <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QDialog</span>(<span class="keyword">this</span>); colorDialog<span class="operator">-</span><span class="operator">></span>setWindowTitle(tr(<span class="string">"Color Options"</span>)); colorDialog<span class="operator">-</span><span class="operator">></span>setLayout(layout); connect(button<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> colorDialog<span class="operator">,</span> SLOT(close())); } colorDialog<span class="operator">-</span><span class="operator">></span>show(); } <span class="type">void</span> Player<span class="operator">::</span>clearHistogram() { <span class="type">QMetaObject</span><span class="operator">::</span>invokeMethod(videoHistogram<span class="operator">,</span> <span class="string">"processFrame"</span><span class="operator">,</span> <span class="type">Qt</span><span class="operator">::</span>QueuedConnection<span class="operator">,</span> Q_ARG(<span class="type"><a href="qvideoframe.html">QVideoFrame</a></span><span class="operator">,</span> <span class="type"><a href="qvideoframe.html">QVideoFrame</a></span>())); <span class="type">QMetaObject</span><span class="operator">::</span>invokeMethod(audioHistogram<span class="operator">,</span> <span class="string">"processBuffer"</span><span class="operator">,</span> <span class="type">Qt</span><span class="operator">::</span>QueuedConnection<span class="operator">,</span> Q_ARG(<span class="type"><a href="qaudiobuffer.html">QAudioBuffer</a></span><span class="operator">,</span> <span class="type"><a href="qaudiobuffer.html">QAudioBuffer</a></span>())); } </pre> </div> <!-- @@@multimediawidgets/player/player.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>