<?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>fftreal_wrapper.h Example File | Qt Multimedia 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="qtmultimedia-index.html">Qt Multimedia</a></td><td ><a href="qtmultimedia-multimedia-spectrum-example.html">Spectrum Example</a></td><td >fftreal_wrapper.h Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtmultimedia-index.html">Qt 5.12.2 Reference Documentation</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">fftreal_wrapper.h Example File</h1> <span class="subtitle">multimedia/spectrum/3rdparty/fftreal/fftreal_wrapper.h</span> <!-- $$$multimedia/spectrum/3rdparty/fftreal/fftreal_wrapper.h-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/*************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** This program is free software: you can redistribute it and/or modify ** it under the terms of the GNU Lesser General Public License as ** published by the Free Software Foundation, either version 2.1. This ** program is distributed in the hope that it will be useful, but WITHOUT ** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or ** FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ** for more details. You should have received a copy of the GNU General ** Public License along with this program. If not, see ** <http://www.gnu.org/licenses/>. ** ***************************************************************************/</span> <span class="preprocessor">#ifndef FFTREAL_WRAPPER_H</span> <span class="preprocessor">#define FFTREAL_WRAPPER_H</span> <span class="preprocessor">#include <QtCore/QtGlobal></span> <span class="preprocessor">#if defined(FFTREAL_LIBRARY)</span> <span class="preprocessor"># define FFTREAL_EXPORT Q_DECL_EXPORT</span> <span class="preprocessor">#else</span> <span class="preprocessor"># define FFTREAL_EXPORT Q_DECL_IMPORT</span> <span class="preprocessor">#endif</span> <span class="keyword">class</span> FFTRealWrapperPrivate; <span class="comment">// Each pass of the FFT processes 2^X samples, where X is the</span> <span class="comment">// number below.</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="type">int</span> FFTLengthPowerOfTwo <span class="operator">=</span> <span class="number">12</span>; <span class="comment">/** * Wrapper around the FFTRealFixLen template provided by the FFTReal * library * * This class instantiates a single instance of FFTRealFixLen, using * FFTLengthPowerOfTwo as the template parameter. It then exposes * FFTRealFixLen<FFTLengthPowerOfTwo>::do_fft via the calculateFFT * function, thereby allowing an application to dynamically link * against the FFTReal implementation. * * See http://ldesoras.free.fr/prod.html */</span> <span class="keyword">class</span> FFTREAL_EXPORT FFTRealWrapper { <span class="keyword">public</span>: FFTRealWrapper(); <span class="operator">~</span>FFTRealWrapper(); <span class="keyword">typedef</span> <span class="type">float</span> DataType; <span class="type">void</span> calculateFFT(DataType in<span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType out<span class="operator">[</span><span class="operator">]</span>); <span class="keyword">private</span>: FFTRealWrapperPrivate<span class="operator">*</span> m_private; }; <span class="preprocessor">#endif // FFTREAL_WRAPPER_H</span> </pre> </div> <!-- @@@multimedia/spectrum/3rdparty/fftreal/fftreal_wrapper.h --> </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>