<?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.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.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.h Example File</h1> <span class="subtitle">multimedia/spectrum/3rdparty/fftreal/FFTReal.h</span> <!-- $$$multimedia/spectrum/3rdparty/fftreal/FFTReal.h-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/***************************************************************************** FFTReal.h Copyright (c) 2005 Laurent de Soras --- Legal stuff --- This library 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 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *Tab=3***********************************************************************/</span> <span class="preprocessor">#if ! defined (FFTReal_HEADER_INCLUDED)</span> <span class="preprocessor">#define FFTReal_HEADER_INCLUDED</span> <span class="preprocessor">#if defined (_MSC_VER)</span> <span class="preprocessor">#pragma once</span> <span class="preprocessor">#pragma warning (4 : 4250) // "Inherits via dominance."</span> <span class="preprocessor">#endif</span> <span class="comment">/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/</span> <span class="preprocessor">#include "def.h"</span> <span class="preprocessor">#include "DynArray.h"</span> <span class="preprocessor">#include "OscSinCos.h"</span> <span class="keyword">template</span> <span class="operator"><</span><span class="keyword">class</span> DT<span class="operator">></span> <span class="keyword">class</span> FFTReal { <span class="comment">/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/</span> <span class="keyword">public</span>: <span class="keyword">enum</span> { MAX_BIT_DEPTH <span class="operator">=</span> <span class="number">30</span> }; <span class="comment">// So length can be represented as long int</span> <span class="keyword">typedef</span> DT DataType; <span class="keyword">explicit</span> FFTReal (<span class="type">long</span> length); <span class="keyword">virtual</span> <span class="operator">~</span>FFTReal () {} <span class="type">long</span> get_length () <span class="keyword">const</span>; <span class="type">void</span> do_fft (DataType f <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType x <span class="operator">[</span><span class="operator">]</span>) <span class="keyword">const</span>; <span class="type">void</span> do_ifft (<span class="keyword">const</span> DataType f <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> DataType x <span class="operator">[</span><span class="operator">]</span>) <span class="keyword">const</span>; <span class="type">void</span> rescale (DataType x <span class="operator">[</span><span class="operator">]</span>) <span class="keyword">const</span>; DataType <span class="operator">*</span> use_buffer () <span class="keyword">const</span>; <span class="comment">/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/</span> <span class="keyword">protected</span>: <span class="comment">/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/</span> <span class="keyword">private</span>: <span class="comment">// Over this bit depth, we use direct calculation for sin/cos</span> <span class="keyword">enum</span> { TRIGO_BD_LIMIT <span class="operator">=</span> <span class="number">12</span> }; <span class="keyword">typedef</span> OscSinCos <span class="operator"><</span>DataType<span class="operator">></span> OscType; <span class="type">void</span> init_br_lut (); <span class="type">void</span> init_trigo_lut (); <span class="type">void</span> init_trigo_osc (); FORCEINLINE <span class="keyword">const</span> <span class="type">long</span> <span class="operator">*</span> get_br_ptr () <span class="keyword">const</span>; FORCEINLINE <span class="keyword">const</span> DataType <span class="operator">*</span> get_trigo_ptr (<span class="type">int</span> level) <span class="keyword">const</span>; FORCEINLINE <span class="type">long</span> get_trigo_level_index (<span class="type">int</span> level) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_fft_general (DataType f <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType x <span class="operator">[</span><span class="operator">]</span>) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_direct_pass_1_2 (DataType df <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType x <span class="operator">[</span><span class="operator">]</span>) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_direct_pass_3 (DataType df <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType sf <span class="operator">[</span><span class="operator">]</span>) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_direct_pass_n (DataType df <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType sf <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="type">int</span> pass) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_direct_pass_n_lut (DataType df <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType sf <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="type">int</span> pass) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_direct_pass_n_osc (DataType df <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType sf <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="type">int</span> pass) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_ifft_general (<span class="keyword">const</span> DataType f <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> DataType x <span class="operator">[</span><span class="operator">]</span>) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_inverse_pass_n (DataType df <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType sf <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="type">int</span> pass) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_inverse_pass_n_osc (DataType df <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType sf <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="type">int</span> pass) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_inverse_pass_n_lut (DataType df <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType sf <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="type">int</span> pass) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_inverse_pass_3 (DataType df <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType sf <span class="operator">[</span><span class="operator">]</span>) <span class="keyword">const</span>; <span class="keyword">inline</span> <span class="type">void</span> compute_inverse_pass_1_2 (DataType x <span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="keyword">const</span> DataType sf <span class="operator">[</span><span class="operator">]</span>) <span class="keyword">const</span>; <span class="keyword">const</span> <span class="type">long</span> _length; <span class="keyword">const</span> <span class="type">int</span> _nbr_bits; DynArray <span class="operator"><</span><span class="type">long</span><span class="operator">></span> _br_lut; DynArray <span class="operator"><</span>DataType<span class="operator">></span> _trigo_lut; <span class="keyword">mutable</span> DynArray <span class="operator"><</span>DataType<span class="operator">></span> _buffer; <span class="keyword">mutable</span> DynArray <span class="operator"><</span>OscType<span class="operator">></span> _trigo_osc; <span class="comment">/*\\\ FORBIDDEN MEMBER FUNCTIONS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/</span> <span class="keyword">private</span>: FFTReal (); FFTReal (<span class="keyword">const</span> FFTReal <span class="operator">&</span>other); FFTReal <span class="operator">&</span> <span class="keyword">operator</span> <span class="operator">=</span> (<span class="keyword">const</span> FFTReal <span class="operator">&</span>other); bool <span class="keyword">operator</span> <span class="operator">=</span><span class="operator">=</span> (<span class="keyword">const</span> FFTReal <span class="operator">&</span>other); bool <span class="keyword">operator</span> <span class="operator">!</span><span class="operator">=</span> (<span class="keyword">const</span> FFTReal <span class="operator">&</span>other); }; <span class="comment">// class FFTReal</span> <span class="preprocessor">#include "FFTReal.hpp"</span> <span class="preprocessor">#endif // FFTReal_HEADER_INCLUDED</span> <span class="comment">/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/</span> </pre> </div> <!-- @@@multimedia/spectrum/3rdparty/fftreal/FFTReal.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>