<?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 5.9</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-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">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">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> 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>
