<?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>audiolevels.cpp Example File | Qt Data Visualization 5.12.2</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 5.12</td><td ><a href="qtdatavisualization-index.html">Qt Data Visualization</a></td><td ><a href="qtdatavisualization-audiolevels-example.html">Audiolevels Example</a></td><td >audiolevels.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtdatavisualization-index.html">Qt Data Visualization | Commercial or GPLv3</a></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">audiolevels.cpp Example File</h1> <span class="subtitle">audiolevels/audiolevels.cpp</span> <!-- $$$audiolevels/audiolevels.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 Data Visualization module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:GPL$ ** 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. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3 or (at your option) any later version ** approved by the KDE Free Qt Foundation. The licenses are as published by ** the Free Software Foundation and appearing in the file LICENSE.GPL3 ** included in the packaging of this file. Please review the following ** information to ensure the GNU General Public License requirements will ** be met: https://www.gnu.org/licenses/gpl-3.0.html. ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "audiolevelsiodevice.h"</span> <span class="preprocessor">#include "audiolevels.h"</span> <span class="preprocessor">#include <QtDataVisualization/qbardataproxy.h></span> <span class="preprocessor">#include <QtDataVisualization/qvalue3daxis.h></span> <span class="preprocessor">#include <QtDataVisualization/q3dscene.h></span> <span class="preprocessor">#include <QtDataVisualization/q3dcamera.h></span> <span class="preprocessor">#include <QtDataVisualization/qbar3dseries.h></span> <span class="preprocessor">#include <QtDataVisualization/q3dtheme.h></span> <span class="preprocessor">#include <QtDataVisualization/qcustom3dlabel.h></span> <span class="preprocessor">#include <QtMultimedia/QAudioDeviceInfo></span> <span class="preprocessor">#include <QtMultimedia/QAudioInput></span> <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="type">QtDataVisualization</span>; AudioLevels<span class="operator">::</span>AudioLevels(<span class="type"><a href="q3dbars.html">Q3DBars</a></span> <span class="operator">*</span>graph<span class="operator">,</span> <span class="type">QObject</span> <span class="operator">*</span>parent) : <span class="type">QObject</span>(parent)<span class="operator">,</span> m_graph(graph)<span class="operator">,</span> m_device(<span class="number">0</span>)<span class="operator">,</span> m_audioInput(<span class="number">0</span>) { <span class="comment">// Set up the graph</span> m_graph<span class="operator">-</span><span class="operator">></span>setBarThickness(<span class="number">0.5f</span>); m_graph<span class="operator">-</span><span class="operator">></span>setBarSpacing(<span class="type">QSizeF</span>(<span class="number">0.0</span><span class="operator">,</span> <span class="number">1.0</span>)); m_graph<span class="operator">-</span><span class="operator">></span>valueAxis()<span class="operator">-</span><span class="operator">></span>setRange(<span class="operator">-</span><span class="number">100.0f</span><span class="operator">,</span> <span class="number">100.0f</span>); m_graph<span class="operator">-</span><span class="operator">></span>valueAxis()<span class="operator">-</span><span class="operator">></span>setSegmentCount(<span class="number">20</span>); m_graph<span class="operator">-</span><span class="operator">></span>valueAxis()<span class="operator">-</span><span class="operator">></span>setLabelFormat(<span class="type">QStringLiteral</span>(<span class="string">"%d%%"</span>)); m_graph<span class="operator">-</span><span class="operator">></span>setShadowQuality(QAbstract3DGraph<span class="operator">::</span>ShadowQualityNone); m_graph<span class="operator">-</span><span class="operator">></span>setSelectionMode(QAbstract3DGraph<span class="operator">::</span>SelectionNone); m_graph<span class="operator">-</span><span class="operator">></span>scene()<span class="operator">-</span><span class="operator">></span>activeCamera()<span class="operator">-</span><span class="operator">></span>setCameraPosition(<span class="operator">-</span><span class="number">25.0f</span><span class="operator">,</span> <span class="number">10.0f</span><span class="operator">,</span> <span class="number">190.0f</span>); m_graph<span class="operator">-</span><span class="operator">></span>activeTheme()<span class="operator">-</span><span class="operator">></span>setType(<span class="type"><a href="q3dtheme.html">Q3DTheme</a></span><span class="operator">::</span>ThemeIsabelle); m_graph<span class="operator">-</span><span class="operator">></span>activeTheme()<span class="operator">-</span><span class="operator">></span>setGridEnabled(<span class="keyword">true</span>); m_graph<span class="operator">-</span><span class="operator">></span>activeTheme()<span class="operator">-</span><span class="operator">></span>setBackgroundEnabled(<span class="keyword">false</span>); <span class="type">QFont</span> font <span class="operator">=</span> m_graph<span class="operator">-</span><span class="operator">></span>activeTheme()<span class="operator">-</span><span class="operator">></span>font(); font<span class="operator">.</span>setPointSize(<span class="number">10</span>); m_graph<span class="operator">-</span><span class="operator">></span>activeTheme()<span class="operator">-</span><span class="operator">></span>setFont(font); QBar3DSeries <span class="operator">*</span>series <span class="operator">=</span> <span class="keyword">new</span> QBar3DSeries; series<span class="operator">-</span><span class="operator">></span>setMesh(QAbstract3DSeries<span class="operator">::</span>MeshBar); m_graph<span class="operator">-</span><span class="operator">></span>addSeries(series); <span class="type">QAudioDeviceInfo</span> inputDevice <span class="operator">=</span> <span class="type">QAudioDeviceInfo</span><span class="operator">::</span>defaultInputDevice(); <span class="keyword">if</span> (inputDevice<span class="operator">.</span>supportedSampleRates()<span class="operator">.</span>size() <span class="operator">></span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> inputDevice<span class="operator">.</span>supportedChannelCounts()<span class="operator">.</span>size() <span class="operator">></span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> inputDevice<span class="operator">.</span>supportedSampleSizes()<span class="operator">.</span>size() <span class="operator">></span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> inputDevice<span class="operator">.</span>supportedCodecs()<span class="operator">.</span>size() <span class="operator">></span> <span class="number">0</span>) { <span class="type">QAudioFormat</span> formatAudio; formatAudio<span class="operator">.</span>setSampleRate(inputDevice<span class="operator">.</span>supportedSampleRates()<span class="operator">.</span>at(<span class="number">0</span>)); formatAudio<span class="operator">.</span>setChannelCount(inputDevice<span class="operator">.</span>supportedChannelCounts()<span class="operator">.</span>at(<span class="number">0</span>)); formatAudio<span class="operator">.</span>setSampleSize(inputDevice<span class="operator">.</span>supportedSampleSizes()<span class="operator">.</span>at(<span class="number">0</span>)); formatAudio<span class="operator">.</span>setCodec(inputDevice<span class="operator">.</span>supportedCodecs()<span class="operator">.</span>at(<span class="number">0</span>)); formatAudio<span class="operator">.</span>setByteOrder(<span class="type">QAudioFormat</span><span class="operator">::</span>LittleEndian); formatAudio<span class="operator">.</span>setSampleType(<span class="type">QAudioFormat</span><span class="operator">::</span>UnSignedInt); m_audioInput <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QAudioInput</span>(inputDevice<span class="operator">,</span> formatAudio<span class="operator">,</span> <span class="keyword">this</span>); <span class="preprocessor">#ifdef Q_OS_MAC</span> <span class="comment">// OS X seems to wait for entire buffer to fill before calling writeData, so use smaller buffer</span> m_audioInput<span class="operator">-</span><span class="operator">></span>setBufferSize(<span class="number">256</span>); <span class="preprocessor">#else</span> m_audioInput<span class="operator">-</span><span class="operator">></span>setBufferSize(<span class="number">1024</span>); <span class="preprocessor">#endif</span> m_device <span class="operator">=</span> <span class="keyword">new</span> AudioLevelsIODevice(m_graph<span class="operator">-</span><span class="operator">></span>seriesList()<span class="operator">.</span>at(<span class="number">0</span>)<span class="operator">-</span><span class="operator">></span>dataProxy()<span class="operator">,</span> <span class="keyword">this</span>); m_device<span class="operator">-</span><span class="operator">></span>open(<span class="type">QIODevice</span><span class="operator">::</span>WriteOnly); m_audioInput<span class="operator">-</span><span class="operator">></span>start(m_device); } <span class="keyword">else</span> { <span class="comment">// No graph content can be shown, so add a custom warning label</span> QCustom3DLabel <span class="operator">*</span>titleLabel <span class="operator">=</span> <span class="keyword">new</span> QCustom3DLabel(<span class="string">"No valid audio input device found"</span><span class="operator">,</span> <span class="type">QFont</span>()<span class="operator">,</span> QVector3D(<span class="number">0.2f</span><span class="operator">,</span> <span class="number">0.2f</span><span class="operator">,</span> <span class="number">0.0f</span>)<span class="operator">,</span> QVector3D(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>)<span class="operator">,</span> <span class="type">QQuaternion</span>()); titleLabel<span class="operator">-</span><span class="operator">></span>setPositionAbsolute(<span class="keyword">true</span>); titleLabel<span class="operator">-</span><span class="operator">></span>setFacingCamera(<span class="keyword">true</span>); m_graph<span class="operator">-</span><span class="operator">></span>addCustomItem(titleLabel); } } AudioLevels<span class="operator">::</span><span class="operator">~</span>AudioLevels() { <span class="keyword">if</span> (m_audioInput) m_audioInput<span class="operator">-</span><span class="operator">></span>stop(); <span class="keyword">if</span> (m_device) m_device<span class="operator">-</span><span class="operator">></span>close(); } </pre> </div> <!-- @@@audiolevels/audiolevels.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 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>