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<h1 class="title">fftreal_wrapper.h Example File</h1>
<span class="small-subtitle">demos/spectrum/3rdparty/fftreal/fftreal_wrapper.h</span>
<!-- $$$demos/spectrum/3rdparty/fftreal/fftreal_wrapper.h-description -->
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<pre class="cpp"> <span class="comment">/***************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** 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>
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