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<h1 class="title">fftreal_wrapper.h Example File</h1>
<span class="small-subtitle">spectrum/3rdparty/fftreal/fftreal_wrapper.h</span>
<!-- $$$spectrum/3rdparty/fftreal/fftreal_wrapper.h-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp"><span class="comment">/***************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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
** &lt;http://www.gnu.org/licenses/&gt;.
**
***************************************************************************/</span>

<span class="preprocessor">#ifndef FFTREAL_WRAPPER_H</span>
<span class="preprocessor">#define FFTREAL_WRAPPER_H</span>

<span class="preprocessor">#include &lt;QtCore/QtGlobal&gt;</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&lt;FFTLengthPowerOfTwo&gt;::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>
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   <acronym title="Copyright">&copy;</acronym> 2013 Digia Plc and/or its
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