Mercurial > hg > vamp-website

annotate code-doc/PowerSpectrum_8cpp-source.html @ 76:e3e11437ecea website

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add forum code
author Chris Cannam
date Sun, 07 Jul 2013 11:25:48 +0200
parents 0976232e353b
children
rev   line source
cannam@21 1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
cannam@21 2 <html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
cannam@21 3 <title>VampPluginSDK: PowerSpectrum.cpp Source File</title>
cannam@35 4 <link href="tabs.css" rel="stylesheet" type="text/css">
cannam@21 5 <link href="doxygen.css" rel="stylesheet" type="text/css">
cannam@21 6 </head><body>
cannam@35 7 <!-- Generated by Doxygen 1.5.8 -->
cannam@21 8 <div class="navigation" id="top">
cannam@21 9 <div class="tabs">
cannam@21 10 <ul>
cannam@21 11 <li><a href="main.html"><span>Main&nbsp;Page</span></a></li>
cannam@21 12 <li><a href="namespaces.html"><span>Namespaces</span></a></li>
cannam@21 13 <li><a href="annotated.html"><span>Classes</span></a></li>
cannam@21 14 <li class="current"><a href="files.html"><span>Files</span></a></li>
cannam@21 15 <li><a href="dirs.html"><span>Directories</span></a></li>
cannam@21 16 </ul>
cannam@21 17 </div>
cannam@35 18 <div class="tabs">
cannam@35 19 <ul>
cannam@35 20 <li><a href="files.html"><span>File&nbsp;List</span></a></li>
cannam@35 21 <li><a href="globals.html"><span>File&nbsp;Members</span></a></li>
cannam@35 22 </ul>
cannam@35 23 </div>
cannam@21 24 <div class="navpath"><a class="el" href="dir_35887283b966ca996e4ff77f459c38ce.html">examples</a>
cannam@21 25 </div>
cannam@21 26 </div>
cannam@21 27 <div class="contents">
cannam@21 28 <h1>PowerSpectrum.cpp</h1><a href="PowerSpectrum_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>
cannam@21 29 <a name="l00002"></a>00002
cannam@21 30 <a name="l00003"></a>00003 <span class="comment">/*</span>
cannam@21 31 <a name="l00004"></a>00004 <span class="comment"> Vamp</span>
cannam@21 32 <a name="l00005"></a>00005 <span class="comment"></span>
cannam@21 33 <a name="l00006"></a>00006 <span class="comment"> An API for audio analysis and feature extraction plugins.</span>
cannam@21 34 <a name="l00007"></a>00007 <span class="comment"></span>
cannam@21 35 <a name="l00008"></a>00008 <span class="comment"> Centre for Digital Music, Queen Mary, University of London.</span>
cannam@21 36 <a name="l00009"></a>00009 <span class="comment"> Copyright 2008 QMUL.</span>
cannam@21 37 <a name="l00010"></a>00010 <span class="comment"> </span>
cannam@21 38 <a name="l00011"></a>00011 <span class="comment"> Permission is hereby granted, free of charge, to any person</span>
cannam@21 39 <a name="l00012"></a>00012 <span class="comment"> obtaining a copy of this software and associated documentation</span>
cannam@21 40 <a name="l00013"></a>00013 <span class="comment"> files (the "Software"), to deal in the Software without</span>
cannam@21 41 <a name="l00014"></a>00014 <span class="comment"> restriction, including without limitation the rights to use, copy,</span>
cannam@21 42 <a name="l00015"></a>00015 <span class="comment"> modify, merge, publish, distribute, sublicense, and/or sell copies</span>
cannam@21 43 <a name="l00016"></a>00016 <span class="comment"> of the Software, and to permit persons to whom the Software is</span>
cannam@21 44 <a name="l00017"></a>00017 <span class="comment"> furnished to do so, subject to the following conditions:</span>
cannam@21 45 <a name="l00018"></a>00018 <span class="comment"></span>
cannam@21 46 <a name="l00019"></a>00019 <span class="comment"> The above copyright notice and this permission notice shall be</span>
cannam@21 47 <a name="l00020"></a>00020 <span class="comment"> included in all copies or substantial portions of the Software.</span>
cannam@21 48 <a name="l00021"></a>00021 <span class="comment"></span>
cannam@21 49 <a name="l00022"></a>00022 <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span>
cannam@21 50 <a name="l00023"></a>00023 <span class="comment"> EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span>
cannam@21 51 <a name="l00024"></a>00024 <span class="comment"> MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span>
cannam@21 52 <a name="l00025"></a>00025 <span class="comment"> NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR</span>
cannam@21 53 <a name="l00026"></a>00026 <span class="comment"> ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF</span>
cannam@21 54 <a name="l00027"></a>00027 <span class="comment"> CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION</span>
cannam@21 55 <a name="l00028"></a>00028 <span class="comment"> WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span>
cannam@21 56 <a name="l00029"></a>00029 <span class="comment"></span>
cannam@21 57 <a name="l00030"></a>00030 <span class="comment"> Except as contained in this notice, the names of the Centre for</span>
cannam@21 58 <a name="l00031"></a>00031 <span class="comment"> Digital Music; Queen Mary, University of London; and Chris Cannam</span>
cannam@21 59 <a name="l00032"></a>00032 <span class="comment"> shall not be used in advertising or otherwise to promote the sale,</span>
cannam@21 60 <a name="l00033"></a>00033 <span class="comment"> use or other dealings in this Software without prior written</span>
cannam@21 61 <a name="l00034"></a>00034 <span class="comment"> authorization.</span>
cannam@21 62 <a name="l00035"></a>00035 <span class="comment">*/</span>
cannam@21 63 <a name="l00036"></a>00036
cannam@21 64 <a name="l00037"></a>00037 <span class="preprocessor">#include "<a class="code" href="PowerSpectrum_8h.html">PowerSpectrum.h</a>"</span>
cannam@21 65 <a name="l00038"></a>00038
cannam@21 66 <a name="l00039"></a>00039 <span class="keyword">using</span> std::string;
cannam@21 67 <a name="l00040"></a>00040 <span class="keyword">using</span> std::cerr;
cannam@21 68 <a name="l00041"></a>00041 <span class="keyword">using</span> std::endl;
cannam@21 69 <a name="l00042"></a>00042
cannam@21 70 <a name="l00043"></a>00043 <span class="preprocessor">#include &lt;math.h&gt;</span>
cannam@21 71 <a name="l00044"></a>00044
cannam@21 72 <a name="l00045"></a><a class="code" href="classPowerSpectrum.html#a2550486513a4abcf7b52869002947e7">00045</a> <a class="code" href="classPowerSpectrum.html#a2550486513a4abcf7b52869002947e7">PowerSpectrum::PowerSpectrum</a>(<span class="keywordtype">float</span> inputSampleRate) :
cannam@21 73 <a name="l00046"></a>00046 Plugin(inputSampleRate),
cannam@21 74 <a name="l00047"></a>00047 m_blockSize(0)
cannam@21 75 <a name="l00048"></a>00048 {
cannam@21 76 <a name="l00049"></a>00049 }
cannam@21 77 <a name="l00050"></a>00050
cannam@21 78 <a name="l00051"></a><a class="code" href="classPowerSpectrum.html#e7081e159ad1da5da1721b3048075306">00051</a> <a class="code" href="classPowerSpectrum.html#e7081e159ad1da5da1721b3048075306">PowerSpectrum::~PowerSpectrum</a>()
cannam@21 79 <a name="l00052"></a>00052 {
cannam@21 80 <a name="l00053"></a>00053 }
cannam@21 81 <a name="l00054"></a>00054
cannam@21 82 <a name="l00055"></a>00055 <span class="keywordtype">string</span>
cannam@21 83 <a name="l00056"></a><a class="code" href="classPowerSpectrum.html#9e9d8349461cbb88d7565a5e8c51b64e">00056</a> <a class="code" href="classPowerSpectrum.html#9e9d8349461cbb88d7565a5e8c51b64e" title="Get the computer-usable name of the plugin.">PowerSpectrum::getIdentifier</a>()<span class="keyword"> const</span>
cannam@21 84 <a name="l00057"></a>00057 <span class="keyword"></span>{
cannam@21 85 <a name="l00058"></a>00058 <span class="keywordflow">return</span> <span class="stringliteral">"powerspectrum"</span>;
cannam@21 86 <a name="l00059"></a>00059 }
cannam@21 87 <a name="l00060"></a>00060
cannam@21 88 <a name="l00061"></a>00061 <span class="keywordtype">string</span>
cannam@21 89 <a name="l00062"></a><a class="code" href="classPowerSpectrum.html#c9214f9cafeeed3fca549c90aef57623">00062</a> <a class="code" href="classPowerSpectrum.html#c9214f9cafeeed3fca549c90aef57623" title="Get a human-readable name or title of the plugin.">PowerSpectrum::getName</a>()<span class="keyword"> const</span>
cannam@21 90 <a name="l00063"></a>00063 <span class="keyword"></span>{
cannam@21 91 <a name="l00064"></a>00064 <span class="keywordflow">return</span> <span class="stringliteral">"Simple Power Spectrum"</span>;
cannam@21 92 <a name="l00065"></a>00065 }
cannam@21 93 <a name="l00066"></a>00066
cannam@21 94 <a name="l00067"></a>00067 <span class="keywordtype">string</span>
cannam@21 95 <a name="l00068"></a><a class="code" href="classPowerSpectrum.html#7b48d56dc954f3af344f7e4dcd8993e5">00068</a> <a class="code" href="classPowerSpectrum.html#7b48d56dc954f3af344f7e4dcd8993e5" title="Get a human-readable description for the plugin, typically a line of text that may...">PowerSpectrum::getDescription</a>()<span class="keyword"> const</span>
cannam@21 96 <a name="l00069"></a>00069 <span class="keyword"></span>{
cannam@21 97 <a name="l00070"></a>00070 <span class="keywordflow">return</span> <span class="stringliteral">"Return the power spectrum of a signal"</span>;
cannam@21 98 <a name="l00071"></a>00071 }
cannam@21 99 <a name="l00072"></a>00072
cannam@21 100 <a name="l00073"></a>00073 <span class="keywordtype">string</span>
cannam@21 101 <a name="l00074"></a><a class="code" href="classPowerSpectrum.html#9f3e3f759e2b67c771a41f1c276984b2">00074</a> <a class="code" href="classPowerSpectrum.html#9f3e3f759e2b67c771a41f1c276984b2" title="Get the name of the author or vendor of the plugin in human-readable form.">PowerSpectrum::getMaker</a>()<span class="keyword"> const</span>
cannam@21 102 <a name="l00075"></a>00075 <span class="keyword"></span>{
cannam@21 103 <a name="l00076"></a>00076 <span class="keywordflow">return</span> <span class="stringliteral">"Vamp SDK Example Plugins"</span>;
cannam@21 104 <a name="l00077"></a>00077 }
cannam@21 105 <a name="l00078"></a>00078
cannam@21 106 <a name="l00079"></a>00079 <span class="keywordtype">int</span>
cannam@21 107 <a name="l00080"></a><a class="code" href="classPowerSpectrum.html#d23d27e4e82f10404a37b933f6a72c33">00080</a> <a class="code" href="classPowerSpectrum.html#d23d27e4e82f10404a37b933f6a72c33" title="Get the version number of the plugin.">PowerSpectrum::getPluginVersion</a>()<span class="keyword"> const</span>
cannam@21 108 <a name="l00081"></a>00081 <span class="keyword"></span>{
cannam@21 109 <a name="l00082"></a>00082 <span class="keywordflow">return</span> 1;
cannam@21 110 <a name="l00083"></a>00083 }
cannam@21 111 <a name="l00084"></a>00084
cannam@21 112 <a name="l00085"></a>00085 <span class="keywordtype">string</span>
cannam@21 113 <a name="l00086"></a><a class="code" href="classPowerSpectrum.html#708b4d335c57643d5ef2b2e1caf43bd9">00086</a> <a class="code" href="classPowerSpectrum.html#708b4d335c57643d5ef2b2e1caf43bd9" title="Get the copyright statement or licensing summary for the plugin.">PowerSpectrum::getCopyright</a>()<span class="keyword"> const</span>
cannam@21 114 <a name="l00087"></a>00087 <span class="keyword"></span>{
cannam@21 115 <a name="l00088"></a>00088 <span class="keywordflow">return</span> <span class="stringliteral">"Freely redistributable (BSD license)"</span>;
cannam@21 116 <a name="l00089"></a>00089 }
cannam@21 117 <a name="l00090"></a>00090
cannam@21 118 <a name="l00091"></a>00091 <span class="keywordtype">bool</span>
cannam@21 119 <a name="l00092"></a><a class="code" href="classPowerSpectrum.html#e2d046334c4bede5be72a0d97e4dfb29">00092</a> <a class="code" href="classPowerSpectrum.html#e2d046334c4bede5be72a0d97e4dfb29" title="Initialise a plugin to prepare it for use with the given number of input channels...">PowerSpectrum::initialise</a>(<span class="keywordtype">size_t</span> channels, <span class="keywordtype">size_t</span> stepSize, <span class="keywordtype">size_t</span> blockSize)
cannam@21 120 <a name="l00093"></a>00093 {
cannam@21 121 <a name="l00094"></a>00094 <span class="keywordflow">if</span> (channels &lt; <a class="code" href="classVamp_1_1Plugin.html#267b42e866df3cf0d190893e8096f525" title="Get the minimum supported number of input channels.">getMinChannelCount</a>() ||
cannam@21 122 <a name="l00095"></a>00095 channels &gt; <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>;
cannam@21 123 <a name="l00096"></a>00096
cannam@21 124 <a name="l00097"></a>00097 <a class="code" href="classPowerSpectrum.html#399e997c033f26b07edb7cc83cd5a6d8">m_blockSize</a> = blockSize;
cannam@21 125 <a name="l00098"></a>00098
cannam@21 126 <a name="l00099"></a>00099 <span class="keywordflow">return</span> <span class="keyword">true</span>;
cannam@21 127 <a name="l00100"></a>00100 }
cannam@21 128 <a name="l00101"></a>00101
cannam@21 129 <a name="l00102"></a>00102 <span class="keywordtype">void</span>
cannam@21 130 <a name="l00103"></a><a class="code" href="classPowerSpectrum.html#091ba21e1697ea4208f42e8295c389d9">00103</a> <a class="code" href="classPowerSpectrum.html#091ba21e1697ea4208f42e8295c389d9" title="Reset the plugin after use, to prepare it for another clean run.">PowerSpectrum::reset</a>()
cannam@21 131 <a name="l00104"></a>00104 {
cannam@21 132 <a name="l00105"></a>00105 }
cannam@21 133 <a name="l00106"></a>00106
cannam@21 134 <a name="l00107"></a>00107 <a class="code" href="classVamp_1_1Plugin.html#30f531b8fb69fac41a24e3d2a6a08ed9">PowerSpectrum::OutputList</a>
cannam@21 135 <a name="l00108"></a><a class="code" href="classPowerSpectrum.html#6aac5f93e3a8c033026d739fed427242">00108</a> <a class="code" href="classPowerSpectrum.html#6aac5f93e3a8c033026d739fed427242" title="Get the outputs of this plugin.">PowerSpectrum::getOutputDescriptors</a>()<span class="keyword"> const</span>
cannam@21 136 <a name="l00109"></a>00109 <span class="keyword"></span>{
cannam@21 137 <a name="l00110"></a>00110 <a class="code" href="classVamp_1_1Plugin.html#30f531b8fb69fac41a24e3d2a6a08ed9">OutputList</a> list;
cannam@21 138 <a name="l00111"></a>00111
cannam@21 139 <a name="l00112"></a>00112 <a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html">OutputDescriptor</a> d;
cannam@35 140 <a name="l00113"></a>00113 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#2e6f77bcb12d4c95da25348ac85b8696" title="The name of the output, in computer-usable form.">identifier</a> = <span class="stringliteral">"powerspectrum"</span>;
cannam@35 141 <a name="l00114"></a>00114 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#0992e05ea70425878365ba85663400a7" title="The human-readable name of the output.">name</a> = <span class="stringliteral">"Power Spectrum"</span>;
cannam@35 142 <a name="l00115"></a>00115 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#8b44602d8ccea8bb862fd766e74efa1c" title="A human-readable short text describing the output.">description</a> = <span class="stringliteral">"Power values of the frequency spectrum bins calculated from the input signal"</span>;
cannam@35 143 <a name="l00116"></a>00116 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#52f4b3d8d7070cc9c5ab4aa6ff0c01a0" title="The unit of the output, in human-readable form.">unit</a> = <span class="stringliteral">""</span>;
cannam@35 144 <a name="l00117"></a>00117 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#0653d3a85fdc226e60fd5e612b399e0c" title="True if the output has the same number of values per sample for every output sample...">hasFixedBinCount</a> = <span class="keyword">true</span>;
cannam@21 145 <a name="l00118"></a>00118 <span class="keywordflow">if</span> (<a class="code" href="classPowerSpectrum.html#399e997c033f26b07edb7cc83cd5a6d8">m_blockSize</a> == 0) {
cannam@21 146 <a name="l00119"></a>00119 <span class="comment">// Just so as not to return "1". This is the bin count that</span>
cannam@21 147 <a name="l00120"></a>00120 <span class="comment">// would result from a block size of 1024, which is a likely</span>
cannam@21 148 <a name="l00121"></a>00121 <span class="comment">// default -- but the host should always set the block size</span>
cannam@21 149 <a name="l00122"></a>00122 <span class="comment">// before querying the bin count for certain.</span>
cannam@35 150 <a name="l00123"></a>00123 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#238a4781ebb4151832cbf521feb0fedc" title="The number of values per result of the output.">binCount</a> = 513;
cannam@21 151 <a name="l00124"></a>00124 } <span class="keywordflow">else</span> {
cannam@35 152 <a name="l00125"></a>00125 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#238a4781ebb4151832cbf521feb0fedc" title="The number of values per result of the output.">binCount</a> = <a class="code" href="classPowerSpectrum.html#399e997c033f26b07edb7cc83cd5a6d8">m_blockSize</a> / 2 + 1;
cannam@21 153 <a name="l00126"></a>00126 }
cannam@35 154 <a name="l00127"></a>00127 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#4b8d0d88bee613709e91b48402e28c8e" title="True if the results in each output bin fall within a fixed numeric range (minimum...">hasKnownExtents</a> = <span class="keyword">false</span>;
cannam@35 155 <a name="l00128"></a>00128 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#43673cd31b2b65af427a8e8b8746b6e8" title="True if the output values are quantized to a particular resolution.">isQuantized</a> = <span class="keyword">false</span>;
cannam@35 156 <a name="l00129"></a>00129 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#3cd2e0b7a6da19c32bbb6809a83d9adf" title="Positioning in time of the output results.">sampleType</a> = <a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#bffa9ed50cd756df70fd51f0355f448c8915f78de285a79dd415e0c6012d1ead" title="Results from each process() align with that call&amp;#39;s block start.">OutputDescriptor::OneSamplePerStep</a>;
cannam@21 157 <a name="l00130"></a>00130 list.push_back(d);
cannam@21 158 <a name="l00131"></a>00131
cannam@21 159 <a name="l00132"></a>00132 <span class="keywordflow">return</span> list;
cannam@21 160 <a name="l00133"></a>00133 }
cannam@21 161 <a name="l00134"></a>00134
cannam@21 162 <a name="l00135"></a>00135 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">PowerSpectrum::FeatureSet</a>
cannam@21 163 <a name="l00136"></a><a class="code" href="classPowerSpectrum.html#a5664ffc2b37a16db471fae791c1f55f">00136</a> <a class="code" href="classPowerSpectrum.html#a5664ffc2b37a16db471fae791c1f55f" title="Process a single block of input data.">PowerSpectrum::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> timestamp)
cannam@21 164 <a name="l00137"></a>00137 {
cannam@21 165 <a name="l00138"></a>00138 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a> fs;
cannam@21 166 <a name="l00139"></a>00139
cannam@21 167 <a name="l00140"></a>00140 <span class="keywordflow">if</span> (<a class="code" href="classPowerSpectrum.html#399e997c033f26b07edb7cc83cd5a6d8">m_blockSize</a> == 0) {
cannam@21 168 <a name="l00141"></a>00141 cerr &lt;&lt; <span class="stringliteral">"ERROR: PowerSpectrum::process: Not initialised"</span> &lt;&lt; endl;
cannam@21 169 <a name="l00142"></a>00142 <span class="keywordflow">return</span> fs;
cannam@21 170 <a name="l00143"></a>00143 }
cannam@21 171 <a name="l00144"></a>00144
cannam@21 172 <a name="l00145"></a>00145 <span class="keywordtype">size_t</span> n = <a class="code" href="classPowerSpectrum.html#399e997c033f26b07edb7cc83cd5a6d8">m_blockSize</a> / 2 + 1;
cannam@21 173 <a name="l00146"></a>00146 <span class="keyword">const</span> <span class="keywordtype">float</span> *fbuf = inputBuffers[0];
cannam@21 174 <a name="l00147"></a>00147
cannam@21 175 <a name="l00148"></a>00148 <a class="code" href="structVamp_1_1Plugin_1_1Feature.html">Feature</a> feature;
cannam@35 176 <a name="l00149"></a>00149 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#116bb1b3420a067fc1290b75982fdf62" title="True if an output feature has its own timestamp.">hasTimestamp</a> = <span class="keyword">false</span>;
cannam@35 177 <a name="l00150"></a>00150 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#106162977cdc92a02146fcb5ed18a34d" title="Results for a single sample of this feature.">values</a>.reserve(n); <span class="comment">// optional</span>
cannam@21 178 <a name="l00151"></a>00151
cannam@21 179 <a name="l00152"></a>00152 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; n; ++i) {
cannam@21 180 <a name="l00153"></a>00153
cannam@21 181 <a name="l00154"></a>00154 <span class="keywordtype">double</span> real = fbuf[i * 2];
cannam@21 182 <a name="l00155"></a>00155 <span class="keywordtype">double</span> imag = fbuf[i * 2 + 1];
cannam@21 183 <a name="l00156"></a>00156
cannam@35 184 <a name="l00157"></a>00157 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#106162977cdc92a02146fcb5ed18a34d" title="Results for a single sample of this feature.">values</a>.push_back(real * real + imag * imag);
cannam@21 185 <a name="l00158"></a>00158 }
cannam@21 186 <a name="l00159"></a>00159
cannam@21 187 <a name="l00160"></a>00160 fs[0].push_back(feature);
cannam@21 188 <a name="l00161"></a>00161
cannam@21 189 <a name="l00162"></a>00162 <span class="keywordflow">return</span> fs;
cannam@21 190 <a name="l00163"></a>00163 }
cannam@21 191 <a name="l00164"></a>00164
cannam@21 192 <a name="l00165"></a>00165 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">PowerSpectrum::FeatureSet</a>
cannam@21 193 <a name="l00166"></a><a class="code" href="classPowerSpectrum.html#c8a9661a785d38f4c5ce8ca2d53e69f9">00166</a> <a class="code" href="classPowerSpectrum.html#c8a9661a785d38f4c5ce8ca2d53e69f9" title="After all blocks have been processed, calculate and return any remaining features...">PowerSpectrum::getRemainingFeatures</a>()
cannam@21 194 <a name="l00167"></a>00167 {
cannam@21 195 <a name="l00168"></a>00168 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>();
cannam@21 196 <a name="l00169"></a>00169 }
cannam@21 197 <a name="l00170"></a>00170
cannam@21 198 </pre></div></div>
cannam@35 199 <hr size="1"><address style="text-align: right;"><small>Generated on Thu Sep 24 13:40:13 2009 for VampPluginSDK by&nbsp;
cannam@21 200 <a href="http://www.doxygen.org/index.html">
cannam@35 201 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.8 </small></address>
cannam@21 202 </body>
cannam@21 203 </html>