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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>VampPluginSDK: SpectralCentroid.cpp Source File</title> <link href="doxygen.css" rel="stylesheet" type="text/css"> <link href="tabs.css" rel="stylesheet" type="text/css"> </head><body> <!-- Generated by Doxygen 1.5.5 --> <div class="navigation" id="top"> <div class="tabs"> <ul> <li><a href="main.html"><span>Main Page</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> <li><a href="dirs.html"><span>Directories</span></a></li> </ul> </div> <div class="navpath"><a class="el" href="dir_35887283b966ca996e4ff77f459c38ce.html">examples</a> </div> </div> </div> <h1>SpectralCentroid.cpp</h1><a href="SpectralCentroid_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */</span> <a name="l00002"></a>00002 <a name="l00003"></a>00003 <span class="comment">/*</span> <a name="l00004"></a>00004 <span class="comment"> Vamp</span> <a name="l00005"></a>00005 <span class="comment"></span> <a name="l00006"></a>00006 <span class="comment"> An API for audio analysis and feature extraction plugins.</span> <a name="l00007"></a>00007 <span class="comment"></span> <a name="l00008"></a>00008 <span class="comment"> Centre for Digital Music, Queen Mary, University of London.</span> <a name="l00009"></a>00009 <span class="comment"> Copyright 2006 Chris Cannam.</span> <a name="l00010"></a>00010 <span class="comment"> </span> <a name="l00011"></a>00011 <span class="comment"> Permission is hereby granted, free of charge, to any person</span> <a name="l00012"></a>00012 <span class="comment"> obtaining a copy of this software and associated documentation</span> <a name="l00013"></a>00013 <span class="comment"> files (the "Software"), to deal in the Software without</span> <a name="l00014"></a>00014 <span class="comment"> restriction, including without limitation the rights to use, copy,</span> <a name="l00015"></a>00015 <span class="comment"> modify, merge, publish, distribute, sublicense, and/or sell copies</span> <a name="l00016"></a>00016 <span class="comment"> of the Software, and to permit persons to whom the Software is</span> <a name="l00017"></a>00017 <span class="comment"> furnished to do so, subject to the following conditions:</span> <a name="l00018"></a>00018 <span class="comment"></span> <a name="l00019"></a>00019 <span class="comment"> The above copyright notice and this permission notice shall be</span> <a name="l00020"></a>00020 <span class="comment"> included in all copies or substantial portions of the Software.</span> <a name="l00021"></a>00021 <span class="comment"></span> <a name="l00022"></a>00022 <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span> <a name="l00023"></a>00023 <span class="comment"> EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span> <a name="l00024"></a>00024 <span class="comment"> MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span> <a name="l00025"></a>00025 <span class="comment"> NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR</span> <a name="l00026"></a>00026 <span class="comment"> ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF</span> <a name="l00027"></a>00027 <span class="comment"> CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION</span> <a name="l00028"></a>00028 <span class="comment"> WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span> <a name="l00029"></a>00029 <span class="comment"></span> <a name="l00030"></a>00030 <span class="comment"> Except as contained in this notice, the names of the Centre for</span> <a name="l00031"></a>00031 <span class="comment"> Digital Music; Queen Mary, University of London; and Chris Cannam</span> <a name="l00032"></a>00032 <span class="comment"> shall not be used in advertising or otherwise to promote the sale,</span> <a name="l00033"></a>00033 <span class="comment"> use or other dealings in this Software without prior written</span> <a name="l00034"></a>00034 <span class="comment"> authorization.</span> <a name="l00035"></a>00035 <span class="comment">*/</span> <a name="l00036"></a>00036 <a name="l00037"></a>00037 <span class="preprocessor">#include "<a class="code" href="SpectralCentroid_8h.html">SpectralCentroid.h</a>"</span> <a name="l00038"></a>00038 <a name="l00039"></a>00039 <span class="keyword">using</span> std::string; <a name="l00040"></a>00040 <span class="keyword">using</span> std::vector; <a name="l00041"></a>00041 <span class="keyword">using</span> std::cerr; <a name="l00042"></a>00042 <span class="keyword">using</span> std::endl; <a name="l00043"></a>00043 <a name="l00044"></a>00044 <span class="preprocessor">#include <cmath></span> <a name="l00045"></a>00045 <a name="l00046"></a>00046 <a name="l00047"></a><a class="code" href="classSpectralCentroid.html#2cd801ad72f262eceb95ab0d22e7dbcd">00047</a> <a class="code" href="classSpectralCentroid.html#2cd801ad72f262eceb95ab0d22e7dbcd">SpectralCentroid::SpectralCentroid</a>(<span class="keywordtype">float</span> inputSampleRate) : <a name="l00048"></a>00048 Plugin(inputSampleRate), <a name="l00049"></a>00049 m_stepSize(0), <a name="l00050"></a>00050 m_blockSize(0) <a name="l00051"></a>00051 { <a name="l00052"></a>00052 } <a name="l00053"></a>00053 <a name="l00054"></a><a class="code" href="classSpectralCentroid.html#483e0d6757bc3dcf61e8066f764f45c6">00054</a> <a class="code" href="classSpectralCentroid.html#483e0d6757bc3dcf61e8066f764f45c6">SpectralCentroid::~SpectralCentroid</a>() <a name="l00055"></a>00055 { <a name="l00056"></a>00056 } <a name="l00057"></a>00057 <a name="l00058"></a>00058 <span class="keywordtype">string</span> <a name="l00059"></a><a class="code" href="classSpectralCentroid.html#1b2c4c8440c024c4c635fcef5697949f">00059</a> <a class="code" href="classSpectralCentroid.html#1b2c4c8440c024c4c635fcef5697949f" title="Get the computer-usable name of the plugin.">SpectralCentroid::getIdentifier</a>()<span class="keyword"> const</span> <a name="l00060"></a>00060 <span class="keyword"></span>{ <a name="l00061"></a>00061 <span class="keywordflow">return</span> <span class="stringliteral">"spectralcentroid"</span>; <a name="l00062"></a>00062 } <a name="l00063"></a>00063 <a name="l00064"></a>00064 <span class="keywordtype">string</span> <a name="l00065"></a><a class="code" href="classSpectralCentroid.html#b7e6a620fea568af431be3cfd9dd5a41">00065</a> <a class="code" href="classSpectralCentroid.html#b7e6a620fea568af431be3cfd9dd5a41" title="Get a human-readable name or title of the plugin.">SpectralCentroid::getName</a>()<span class="keyword"> const</span> <a name="l00066"></a>00066 <span class="keyword"></span>{ <a name="l00067"></a>00067 <span class="keywordflow">return</span> <span class="stringliteral">"Spectral Centroid"</span>; <a name="l00068"></a>00068 } <a name="l00069"></a>00069 <a name="l00070"></a>00070 <span class="keywordtype">string</span> <a name="l00071"></a><a class="code" href="classSpectralCentroid.html#8fbb74a46283057d9a0b0e4718ee943c">00071</a> <a class="code" href="classSpectralCentroid.html#8fbb74a46283057d9a0b0e4718ee943c" title="Get a human-readable description for the plugin, typically a line of text that may...">SpectralCentroid::getDescription</a>()<span class="keyword"> const</span> <a name="l00072"></a>00072 <span class="keyword"></span>{ <a name="l00073"></a>00073 <span class="keywordflow">return</span> <span class="stringliteral">"Calculate the centroid frequency of the spectrum of the input signal"</span>; <a name="l00074"></a>00074 } <a name="l00075"></a>00075 <a name="l00076"></a>00076 <span class="keywordtype">string</span> <a name="l00077"></a><a class="code" href="classSpectralCentroid.html#c01ff858bf67e2e93ad5d24a6ba8c8c8">00077</a> <a class="code" href="classSpectralCentroid.html#c01ff858bf67e2e93ad5d24a6ba8c8c8" title="Get the name of the author or vendor of the plugin in human-readable form.">SpectralCentroid::getMaker</a>()<span class="keyword"> const</span> <a name="l00078"></a>00078 <span class="keyword"></span>{ <a name="l00079"></a>00079 <span class="keywordflow">return</span> <span class="stringliteral">"Vamp SDK Example Plugins"</span>; <a name="l00080"></a>00080 } <a name="l00081"></a>00081 <a name="l00082"></a>00082 <span class="keywordtype">int</span> <a name="l00083"></a><a class="code" href="classSpectralCentroid.html#f64622e66bf678ac2b0b58aa832ca2b3">00083</a> <a class="code" href="classSpectralCentroid.html#f64622e66bf678ac2b0b58aa832ca2b3" title="Get the version number of the plugin.">SpectralCentroid::getPluginVersion</a>()<span class="keyword"> const</span> <a name="l00084"></a>00084 <span class="keyword"></span>{ <a name="l00085"></a>00085 <span class="keywordflow">return</span> 2; <a name="l00086"></a>00086 } <a name="l00087"></a>00087 <a name="l00088"></a>00088 <span class="keywordtype">string</span> <a name="l00089"></a><a class="code" href="classSpectralCentroid.html#925747d513d598e0fa21ed0ed6520980">00089</a> <a class="code" href="classSpectralCentroid.html#925747d513d598e0fa21ed0ed6520980" title="Get the copyright statement or licensing summary for the plugin.">SpectralCentroid::getCopyright</a>()<span class="keyword"> const</span> <a name="l00090"></a>00090 <span class="keyword"></span>{ <a name="l00091"></a>00091 <span class="keywordflow">return</span> <span class="stringliteral">"Freely redistributable (BSD license)"</span>; <a name="l00092"></a>00092 } <a name="l00093"></a>00093 <a name="l00094"></a>00094 <span class="keywordtype">bool</span> <a name="l00095"></a><a class="code" href="classSpectralCentroid.html#ab1ae16f5c68e2b319668f447908cedb">00095</a> <a class="code" href="classSpectralCentroid.html#ab1ae16f5c68e2b319668f447908cedb" title="Initialise a plugin to prepare it for use with the given number of input channels...">SpectralCentroid::initialise</a>(<span class="keywordtype">size_t</span> channels, <span class="keywordtype">size_t</span> stepSize, <span class="keywordtype">size_t</span> blockSize) <a name="l00096"></a>00096 { <a name="l00097"></a>00097 <span class="keywordflow">if</span> (channels < <a class="code" href="classVamp_1_1Plugin.html#267b42e866df3cf0d190893e8096f525" title="Get the minimum supported number of input channels.">getMinChannelCount</a>() || <a name="l00098"></a>00098 channels > <a class="code" href="classVamp_1_1Plugin.html#2c5ab12b6fa4847cb244bd1e9cb3ae5e" title="Get the maximum supported number of input channels.">getMaxChannelCount</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>; <a name="l00099"></a>00099 <a name="l00100"></a>00100 <a class="code" href="classSpectralCentroid.html#49805a090ba58477da4adbefea4392a7">m_stepSize</a> = stepSize; <a name="l00101"></a>00101 <a class="code" href="classSpectralCentroid.html#262f583d71b442bb2d80023e7c85aa4e">m_blockSize</a> = blockSize; <a name="l00102"></a>00102 <a name="l00103"></a>00103 <span class="keywordflow">return</span> <span class="keyword">true</span>; <a name="l00104"></a>00104 } <a name="l00105"></a>00105 <a name="l00106"></a>00106 <span class="keywordtype">void</span> <a name="l00107"></a><a class="code" href="classSpectralCentroid.html#9b5f5581691ff8f46bb7674d8d74395c">00107</a> <a class="code" href="classSpectralCentroid.html#9b5f5581691ff8f46bb7674d8d74395c" title="Reset the plugin after use, to prepare it for another clean run.">SpectralCentroid::reset</a>() <a name="l00108"></a>00108 { <a name="l00109"></a>00109 } <a name="l00110"></a>00110 <a name="l00111"></a>00111 <a class="code" href="classVamp_1_1Plugin.html#30f531b8fb69fac41a24e3d2a6a08ed9">SpectralCentroid::OutputList</a> <a name="l00112"></a><a class="code" href="classSpectralCentroid.html#894ca9740927102bb80b56b5e9e95877">00112</a> <a class="code" href="classSpectralCentroid.html#894ca9740927102bb80b56b5e9e95877" title="Get the outputs of this plugin.">SpectralCentroid::getOutputDescriptors</a>()<span class="keyword"> const</span> <a name="l00113"></a>00113 <span class="keyword"></span>{ <a name="l00114"></a>00114 <a class="code" href="classVamp_1_1Plugin.html#30f531b8fb69fac41a24e3d2a6a08ed9">OutputList</a> list; <a name="l00115"></a>00115 <a name="l00116"></a>00116 <a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html">OutputDescriptor</a> d; <a name="l00117"></a>00117 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#e2c893ddb1860589517ab7eaa989a18b" title="The name of the output, in computer-usable form.">identifier</a> = <span class="stringliteral">"logcentroid"</span>; <a name="l00118"></a>00118 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#b824b2b34ee50f897a30901c620e8d87" title="The human-readable name of the output.">name</a> = <span class="stringliteral">"Log Frequency Centroid"</span>; <a name="l00119"></a>00119 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#f9b4fe8f78e7126ead820ba5dc55efd1" title="A human-readable short text describing the output.">description</a> = <span class="stringliteral">"Centroid of the log weighted frequency spectrum"</span>; <a name="l00120"></a>00120 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#a057a8833fa037f06ac9f7b85b85d5e4" title="The unit of the output, in human-readable form.">unit</a> = <span class="stringliteral">"Hz"</span>; <a name="l00121"></a>00121 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#f0e577e1a256ff6eed6ea42133fec77d" title="True if the output has the same number of values per sample for every output sample...">hasFixedBinCount</a> = <span class="keyword">true</span>; <a name="l00122"></a>00122 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#fdd006959a995e40ef7d565a3a4df6dc" title="The number of values per result of the output.">binCount</a> = 1; <a name="l00123"></a>00123 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#e9ccb65f99f477096b65dd031f4c5e31" title="True if the results in each output bin fall within a fixed numeric range (minimum...">hasKnownExtents</a> = <span class="keyword">false</span>; <a name="l00124"></a>00124 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#1b4858928d23bfd7d5bc557c82a83fb4" title="True if the output values are quantized to a particular resolution.">isQuantized</a> = <span class="keyword">false</span>; <a name="l00125"></a>00125 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#0d1194980d44e31b25ef3b4b070d6b5d" title="Positioning in time of the output results.">sampleType</a> = <a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#bffa9ed50cd756df70fd51f0355f448c0459d5d0d2198d21e8bc90abe4fdccca" title="Results from each process() align with that call&#39;s block start.">OutputDescriptor::OneSamplePerStep</a>; <a name="l00126"></a>00126 list.push_back(d); <a name="l00127"></a>00127 <a name="l00128"></a>00128 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#e2c893ddb1860589517ab7eaa989a18b" title="The name of the output, in computer-usable form.">identifier</a> = <span class="stringliteral">"linearcentroid"</span>; <a name="l00129"></a>00129 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#b824b2b34ee50f897a30901c620e8d87" title="The human-readable name of the output.">name</a> = <span class="stringliteral">"Linear Frequency Centroid"</span>; <a name="l00130"></a>00130 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#f9b4fe8f78e7126ead820ba5dc55efd1" title="A human-readable short text describing the output.">description</a> = <span class="stringliteral">"Centroid of the linear frequency spectrum"</span>; <a name="l00131"></a>00131 list.push_back(d); <a name="l00132"></a>00132 <a name="l00133"></a>00133 <span class="keywordflow">return</span> list; <a name="l00134"></a>00134 } <a name="l00135"></a>00135 <a name="l00136"></a>00136 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">SpectralCentroid::FeatureSet</a> <a name="l00137"></a><a class="code" href="classSpectralCentroid.html#ca96c70e7e75c9e4a7db38485018914c">00137</a> <a class="code" href="classSpectralCentroid.html#ca96c70e7e75c9e4a7db38485018914c" title="Process a single block of input data.">SpectralCentroid::process</a>(<span class="keyword">const</span> <span class="keywordtype">float</span> *<span class="keyword">const</span> *inputBuffers, <a class="code" href="structVamp_1_1RealTime.html" title="RealTime represents time values to nanosecond precision with accurate arithmetic...">Vamp::RealTime</a>) <a name="l00138"></a>00138 { <a name="l00139"></a>00139 <span class="keywordflow">if</span> (<a class="code" href="classSpectralCentroid.html#49805a090ba58477da4adbefea4392a7">m_stepSize</a> == 0) { <a name="l00140"></a>00140 cerr << <span class="stringliteral">"ERROR: SpectralCentroid::process: "</span> <a name="l00141"></a>00141 << <span class="stringliteral">"SpectralCentroid has not been initialised"</span> <a name="l00142"></a>00142 << endl; <a name="l00143"></a>00143 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>(); <a name="l00144"></a>00144 } <a name="l00145"></a>00145 <a name="l00146"></a>00146 <span class="keywordtype">double</span> numLin = 0.0, numLog = 0.0, denom = 0.0; <a name="l00147"></a>00147 <a name="l00148"></a>00148 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 1; i <= <a class="code" href="classSpectralCentroid.html#262f583d71b442bb2d80023e7c85aa4e">m_blockSize</a>/2; ++i) { <a name="l00149"></a>00149 <span class="keywordtype">double</span> freq = (double(i) * <a class="code" href="classVamp_1_1Plugin.html#59b9dd82a4f4eb946cd0474cc81abc23">m_inputSampleRate</a>) / <a class="code" href="classSpectralCentroid.html#262f583d71b442bb2d80023e7c85aa4e">m_blockSize</a>; <a name="l00150"></a>00150 <span class="keywordtype">double</span> real = inputBuffers[0][i*2]; <a name="l00151"></a>00151 <span class="keywordtype">double</span> imag = inputBuffers[0][i*2 + 1]; <a name="l00152"></a>00152 <span class="keywordtype">double</span> power = sqrt(real * real + imag * imag) / (<a class="code" href="classSpectralCentroid.html#262f583d71b442bb2d80023e7c85aa4e">m_blockSize</a>/2); <a name="l00153"></a>00153 numLin += freq * power; <a name="l00154"></a>00154 numLog += log10f(freq) * power; <a name="l00155"></a>00155 denom += power; <a name="l00156"></a>00156 } <a name="l00157"></a>00157 <a name="l00158"></a>00158 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a> returnFeatures; <a name="l00159"></a>00159 <a name="l00160"></a>00160 <span class="comment">// std::cerr << "power " << denom << ", block size " << m_blockSize << std::endl;</span> <a name="l00161"></a>00161 <a name="l00162"></a>00162 <span class="keywordflow">if</span> (denom != 0.0) { <a name="l00163"></a>00163 <span class="keywordtype">float</span> centroidLin = float(numLin / denom); <a name="l00164"></a>00164 <span class="keywordtype">float</span> centroidLog = powf(10, <span class="keywordtype">float</span>(numLog / denom)); <a name="l00165"></a>00165 <a name="l00166"></a>00166 <a class="code" href="structVamp_1_1Plugin_1_1Feature.html">Feature</a> feature; <a name="l00167"></a>00167 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#98907091d0b6a589720ae35ae588a82b" title="True if an output feature has its own timestamp.">hasTimestamp</a> = <span class="keyword">false</span>; <a name="l00168"></a>00168 <span class="keywordflow">if</span> (!std::isnan(centroidLog) && !std::isinf(centroidLog)) { <a name="l00169"></a>00169 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#60b9f3057386820dbcaec0eb1189ce71" title="Results for a single sample of this feature.">values</a>.push_back(centroidLog); <a name="l00170"></a>00170 } <a name="l00171"></a>00171 returnFeatures[0].push_back(feature); <a name="l00172"></a>00172 <a name="l00173"></a>00173 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#60b9f3057386820dbcaec0eb1189ce71" title="Results for a single sample of this feature.">values</a>.clear(); <a name="l00174"></a>00174 <span class="keywordflow">if</span> (!std::isnan(centroidLin) && !std::isinf(centroidLin)) { <a name="l00175"></a>00175 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#60b9f3057386820dbcaec0eb1189ce71" title="Results for a single sample of this feature.">values</a>.push_back(centroidLin); <a name="l00176"></a>00176 } <a name="l00177"></a>00177 returnFeatures[1].push_back(feature); <a name="l00178"></a>00178 } <a name="l00179"></a>00179 <a name="l00180"></a>00180 <span class="keywordflow">return</span> returnFeatures; <a name="l00181"></a>00181 } <a name="l00182"></a>00182 <a name="l00183"></a>00183 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">SpectralCentroid::FeatureSet</a> <a name="l00184"></a><a class="code" href="classSpectralCentroid.html#83ba39f0870a2f86837605a958dfab1a">00184</a> <a class="code" href="classSpectralCentroid.html#83ba39f0870a2f86837605a958dfab1a" title="After all blocks have been processed, calculate and return any remaining features...">SpectralCentroid::getRemainingFeatures</a>() <a name="l00185"></a>00185 { <a name="l00186"></a>00186 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>(); <a name="l00187"></a>00187 } <a name="l00188"></a>00188 </pre></div></div> <hr size="1"><address style="text-align: right;"><small>Generated on Wed Jul 9 11:36:07 2008 for VampPluginSDK by <a href="http://www.doxygen.org/index.html"> <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.5 </small></address> </body> </html>