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* Update for 2.1 release; add wiki link
author cannam
date Fri, 25 Sep 2009 15:40:18 +0000
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3 <title>VampPluginSDK: SpectralCentroid.cpp Source File</title> 3 <title>VampPluginSDK: SpectralCentroid.cpp Source File</title>
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62 <a name="l00041"></a>00041 <span class="keyword">using</span> std::cerr; 68 <a name="l00041"></a>00041 <span class="keyword">using</span> std::cerr;
63 <a name="l00042"></a>00042 <span class="keyword">using</span> std::endl; 69 <a name="l00042"></a>00042 <span class="keyword">using</span> std::endl;
64 <a name="l00043"></a>00043 70 <a name="l00043"></a>00043
65 <a name="l00044"></a>00044 <span class="preprocessor">#include &lt;math.h&gt;</span> 71 <a name="l00044"></a>00044 <span class="preprocessor">#include &lt;math.h&gt;</span>
66 <a name="l00045"></a>00045 72 <a name="l00045"></a>00045
67 <a name="l00046"></a>00046 <span class="preprocessor">#ifdef WIN32</span> 73 <a name="l00046"></a>00046 <span class="preprocessor">#ifdef __SUNPRO_CC</span>
68 <a name="l00047"></a>00047 <span class="preprocessor"></span><span class="preprocessor">#define isnan(x) false</span> 74 <a name="l00047"></a>00047 <span class="preprocessor"></span><span class="preprocessor">#include &lt;ieeefp.h&gt;</span>
69 <a name="l00048"></a>00048 <span class="preprocessor"></span><span class="preprocessor">#define isinf(x) false</span> 75 <a name="l00048"></a>00048 <span class="preprocessor">#define isinf(x) (!finite(x))</span>
70 <a name="l00049"></a>00049 <span class="preprocessor"></span><span class="preprocessor">#endif</span> 76 <a name="l00049"></a>00049 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
71 <a name="l00050"></a>00050 <span class="preprocessor"></span> 77 <a name="l00050"></a>00050 <span class="preprocessor"></span>
72 <a name="l00051"></a><a class="code" href="classSpectralCentroid.html#2cd801ad72f262eceb95ab0d22e7dbcd">00051</a> <a class="code" href="classSpectralCentroid.html#2cd801ad72f262eceb95ab0d22e7dbcd">SpectralCentroid::SpectralCentroid</a>(<span class="keywordtype">float</span> inputSampleRate) : 78 <a name="l00051"></a>00051 <span class="preprocessor">#ifdef WIN32</span>
73 <a name="l00052"></a>00052 Plugin(inputSampleRate), 79 <a name="l00052"></a>00052 <span class="preprocessor"></span><span class="preprocessor">#define isnan(x) false</span>
74 <a name="l00053"></a>00053 m_stepSize(0), 80 <a name="l00053"></a>00053 <span class="preprocessor"></span><span class="preprocessor">#define isinf(x) false</span>
75 <a name="l00054"></a>00054 m_blockSize(0) 81 <a name="l00054"></a>00054 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
76 <a name="l00055"></a>00055 { 82 <a name="l00055"></a>00055 <span class="preprocessor"></span>
77 <a name="l00056"></a>00056 } 83 <a name="l00056"></a><a class="code" href="classSpectralCentroid.html#2cd801ad72f262eceb95ab0d22e7dbcd">00056</a> <a class="code" href="classSpectralCentroid.html#2cd801ad72f262eceb95ab0d22e7dbcd">SpectralCentroid::SpectralCentroid</a>(<span class="keywordtype">float</span> inputSampleRate) :
78 <a name="l00057"></a>00057 84 <a name="l00057"></a>00057 Plugin(inputSampleRate),
79 <a name="l00058"></a><a class="code" href="classSpectralCentroid.html#483e0d6757bc3dcf61e8066f764f45c6">00058</a> <a class="code" href="classSpectralCentroid.html#483e0d6757bc3dcf61e8066f764f45c6">SpectralCentroid::~SpectralCentroid</a>() 85 <a name="l00058"></a>00058 m_stepSize(0),
80 <a name="l00059"></a>00059 { 86 <a name="l00059"></a>00059 m_blockSize(0)
81 <a name="l00060"></a>00060 } 87 <a name="l00060"></a>00060 {
82 <a name="l00061"></a>00061 88 <a name="l00061"></a>00061 }
83 <a name="l00062"></a>00062 <span class="keywordtype">string</span> 89 <a name="l00062"></a>00062
84 <a name="l00063"></a><a class="code" href="classSpectralCentroid.html#1b2c4c8440c024c4c635fcef5697949f">00063</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> 90 <a name="l00063"></a><a class="code" href="classSpectralCentroid.html#483e0d6757bc3dcf61e8066f764f45c6">00063</a> <a class="code" href="classSpectralCentroid.html#483e0d6757bc3dcf61e8066f764f45c6">SpectralCentroid::~SpectralCentroid</a>()
85 <a name="l00064"></a>00064 <span class="keyword"></span>{ 91 <a name="l00064"></a>00064 {
86 <a name="l00065"></a>00065 <span class="keywordflow">return</span> <span class="stringliteral">"spectralcentroid"</span>; 92 <a name="l00065"></a>00065 }
87 <a name="l00066"></a>00066 } 93 <a name="l00066"></a>00066
88 <a name="l00067"></a>00067 94 <a name="l00067"></a>00067 <span class="keywordtype">string</span>
89 <a name="l00068"></a>00068 <span class="keywordtype">string</span> 95 <a name="l00068"></a><a class="code" href="classSpectralCentroid.html#1b2c4c8440c024c4c635fcef5697949f">00068</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>
90 <a name="l00069"></a><a class="code" href="classSpectralCentroid.html#b7e6a620fea568af431be3cfd9dd5a41">00069</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> 96 <a name="l00069"></a>00069 <span class="keyword"></span>{
91 <a name="l00070"></a>00070 <span class="keyword"></span>{ 97 <a name="l00070"></a>00070 <span class="keywordflow">return</span> <span class="stringliteral">"spectralcentroid"</span>;
92 <a name="l00071"></a>00071 <span class="keywordflow">return</span> <span class="stringliteral">"Spectral Centroid"</span>; 98 <a name="l00071"></a>00071 }
93 <a name="l00072"></a>00072 } 99 <a name="l00072"></a>00072
94 <a name="l00073"></a>00073 100 <a name="l00073"></a>00073 <span class="keywordtype">string</span>
95 <a name="l00074"></a>00074 <span class="keywordtype">string</span> 101 <a name="l00074"></a><a class="code" href="classSpectralCentroid.html#b7e6a620fea568af431be3cfd9dd5a41">00074</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>
96 <a name="l00075"></a><a class="code" href="classSpectralCentroid.html#8fbb74a46283057d9a0b0e4718ee943c">00075</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> 102 <a name="l00075"></a>00075 <span class="keyword"></span>{
97 <a name="l00076"></a>00076 <span class="keyword"></span>{ 103 <a name="l00076"></a>00076 <span class="keywordflow">return</span> <span class="stringliteral">"Spectral Centroid"</span>;
98 <a name="l00077"></a>00077 <span class="keywordflow">return</span> <span class="stringliteral">"Calculate the centroid frequency of the spectrum of the input signal"</span>; 104 <a name="l00077"></a>00077 }
99 <a name="l00078"></a>00078 } 105 <a name="l00078"></a>00078
100 <a name="l00079"></a>00079 106 <a name="l00079"></a>00079 <span class="keywordtype">string</span>
101 <a name="l00080"></a>00080 <span class="keywordtype">string</span> 107 <a name="l00080"></a><a class="code" href="classSpectralCentroid.html#8fbb74a46283057d9a0b0e4718ee943c">00080</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>
102 <a name="l00081"></a><a class="code" href="classSpectralCentroid.html#c01ff858bf67e2e93ad5d24a6ba8c8c8">00081</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> 108 <a name="l00081"></a>00081 <span class="keyword"></span>{
103 <a name="l00082"></a>00082 <span class="keyword"></span>{ 109 <a name="l00082"></a>00082 <span class="keywordflow">return</span> <span class="stringliteral">"Calculate the centroid frequency of the spectrum of the input signal"</span>;
104 <a name="l00083"></a>00083 <span class="keywordflow">return</span> <span class="stringliteral">"Vamp SDK Example Plugins"</span>; 110 <a name="l00083"></a>00083 }
105 <a name="l00084"></a>00084 } 111 <a name="l00084"></a>00084
106 <a name="l00085"></a>00085 112 <a name="l00085"></a>00085 <span class="keywordtype">string</span>
107 <a name="l00086"></a>00086 <span class="keywordtype">int</span> 113 <a name="l00086"></a><a class="code" href="classSpectralCentroid.html#c01ff858bf67e2e93ad5d24a6ba8c8c8">00086</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>
108 <a name="l00087"></a><a class="code" href="classSpectralCentroid.html#f64622e66bf678ac2b0b58aa832ca2b3">00087</a> <a class="code" href="classSpectralCentroid.html#f64622e66bf678ac2b0b58aa832ca2b3" title="Get the version number of the plugin.">SpectralCentroid::getPluginVersion</a>()<span class="keyword"> const</span> 114 <a name="l00087"></a>00087 <span class="keyword"></span>{
109 <a name="l00088"></a>00088 <span class="keyword"></span>{ 115 <a name="l00088"></a>00088 <span class="keywordflow">return</span> <span class="stringliteral">"Vamp SDK Example Plugins"</span>;
110 <a name="l00089"></a>00089 <span class="keywordflow">return</span> 2; 116 <a name="l00089"></a>00089 }
111 <a name="l00090"></a>00090 } 117 <a name="l00090"></a>00090
112 <a name="l00091"></a>00091 118 <a name="l00091"></a>00091 <span class="keywordtype">int</span>
113 <a name="l00092"></a>00092 <span class="keywordtype">string</span> 119 <a name="l00092"></a><a class="code" href="classSpectralCentroid.html#f64622e66bf678ac2b0b58aa832ca2b3">00092</a> <a class="code" href="classSpectralCentroid.html#f64622e66bf678ac2b0b58aa832ca2b3" title="Get the version number of the plugin.">SpectralCentroid::getPluginVersion</a>()<span class="keyword"> const</span>
114 <a name="l00093"></a><a class="code" href="classSpectralCentroid.html#925747d513d598e0fa21ed0ed6520980">00093</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> 120 <a name="l00093"></a>00093 <span class="keyword"></span>{
115 <a name="l00094"></a>00094 <span class="keyword"></span>{ 121 <a name="l00094"></a>00094 <span class="keywordflow">return</span> 2;
116 <a name="l00095"></a>00095 <span class="keywordflow">return</span> <span class="stringliteral">"Freely redistributable (BSD license)"</span>; 122 <a name="l00095"></a>00095 }
117 <a name="l00096"></a>00096 } 123 <a name="l00096"></a>00096
118 <a name="l00097"></a>00097 124 <a name="l00097"></a>00097 <span class="keywordtype">string</span>
119 <a name="l00098"></a>00098 <span class="keywordtype">bool</span> 125 <a name="l00098"></a><a class="code" href="classSpectralCentroid.html#925747d513d598e0fa21ed0ed6520980">00098</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>
120 <a name="l00099"></a><a class="code" href="classSpectralCentroid.html#ab1ae16f5c68e2b319668f447908cedb">00099</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) 126 <a name="l00099"></a>00099 <span class="keyword"></span>{
121 <a name="l00100"></a>00100 { 127 <a name="l00100"></a>00100 <span class="keywordflow">return</span> <span class="stringliteral">"Freely redistributable (BSD license)"</span>;
122 <a name="l00101"></a>00101 <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>() || 128 <a name="l00101"></a>00101 }
123 <a name="l00102"></a>00102 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>; 129 <a name="l00102"></a>00102
124 <a name="l00103"></a>00103 130 <a name="l00103"></a>00103 <span class="keywordtype">bool</span>
125 <a name="l00104"></a>00104 <a class="code" href="classSpectralCentroid.html#49805a090ba58477da4adbefea4392a7">m_stepSize</a> = stepSize; 131 <a name="l00104"></a><a class="code" href="classSpectralCentroid.html#ab1ae16f5c68e2b319668f447908cedb">00104</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)
126 <a name="l00105"></a>00105 <a class="code" href="classSpectralCentroid.html#262f583d71b442bb2d80023e7c85aa4e">m_blockSize</a> = blockSize; 132 <a name="l00105"></a>00105 {
127 <a name="l00106"></a>00106 133 <a name="l00106"></a>00106 <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>() ||
128 <a name="l00107"></a>00107 <span class="keywordflow">return</span> <span class="keyword">true</span>; 134 <a name="l00107"></a>00107 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>;
129 <a name="l00108"></a>00108 } 135 <a name="l00108"></a>00108
130 <a name="l00109"></a>00109 136 <a name="l00109"></a>00109 <a class="code" href="classSpectralCentroid.html#49805a090ba58477da4adbefea4392a7">m_stepSize</a> = stepSize;
131 <a name="l00110"></a>00110 <span class="keywordtype">void</span> 137 <a name="l00110"></a>00110 <a class="code" href="classSpectralCentroid.html#262f583d71b442bb2d80023e7c85aa4e">m_blockSize</a> = blockSize;
132 <a name="l00111"></a><a class="code" href="classSpectralCentroid.html#9b5f5581691ff8f46bb7674d8d74395c">00111</a> <a class="code" href="classSpectralCentroid.html#9b5f5581691ff8f46bb7674d8d74395c" title="Reset the plugin after use, to prepare it for another clean run.">SpectralCentroid::reset</a>() 138 <a name="l00111"></a>00111
133 <a name="l00112"></a>00112 { 139 <a name="l00112"></a>00112 <span class="keywordflow">return</span> <span class="keyword">true</span>;
134 <a name="l00113"></a>00113 } 140 <a name="l00113"></a>00113 }
135 <a name="l00114"></a>00114 141 <a name="l00114"></a>00114
136 <a name="l00115"></a>00115 <a class="code" href="classVamp_1_1Plugin.html#30f531b8fb69fac41a24e3d2a6a08ed9">SpectralCentroid::OutputList</a> 142 <a name="l00115"></a>00115 <span class="keywordtype">void</span>
137 <a name="l00116"></a><a class="code" href="classSpectralCentroid.html#894ca9740927102bb80b56b5e9e95877">00116</a> <a class="code" href="classSpectralCentroid.html#894ca9740927102bb80b56b5e9e95877" title="Get the outputs of this plugin.">SpectralCentroid::getOutputDescriptors</a>()<span class="keyword"> const</span> 143 <a name="l00116"></a><a class="code" href="classSpectralCentroid.html#9b5f5581691ff8f46bb7674d8d74395c">00116</a> <a class="code" href="classSpectralCentroid.html#9b5f5581691ff8f46bb7674d8d74395c" title="Reset the plugin after use, to prepare it for another clean run.">SpectralCentroid::reset</a>()
138 <a name="l00117"></a>00117 <span class="keyword"></span>{ 144 <a name="l00117"></a>00117 {
139 <a name="l00118"></a>00118 <a class="code" href="classVamp_1_1Plugin.html#30f531b8fb69fac41a24e3d2a6a08ed9">OutputList</a> list; 145 <a name="l00118"></a>00118 }
140 <a name="l00119"></a>00119 146 <a name="l00119"></a>00119
141 <a name="l00120"></a>00120 <a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html">OutputDescriptor</a> d; 147 <a name="l00120"></a>00120 <a class="code" href="classVamp_1_1Plugin.html#30f531b8fb69fac41a24e3d2a6a08ed9">SpectralCentroid::OutputList</a>
142 <a name="l00121"></a>00121 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>; 148 <a name="l00121"></a><a class="code" href="classSpectralCentroid.html#894ca9740927102bb80b56b5e9e95877">00121</a> <a class="code" href="classSpectralCentroid.html#894ca9740927102bb80b56b5e9e95877" title="Get the outputs of this plugin.">SpectralCentroid::getOutputDescriptors</a>()<span class="keyword"> const</span>
143 <a name="l00122"></a>00122 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>; 149 <a name="l00122"></a>00122 <span class="keyword"></span>{
144 <a name="l00123"></a>00123 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>; 150 <a name="l00123"></a>00123 <a class="code" href="classVamp_1_1Plugin.html#30f531b8fb69fac41a24e3d2a6a08ed9">OutputList</a> list;
145 <a name="l00124"></a>00124 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>; 151 <a name="l00124"></a>00124
146 <a name="l00125"></a>00125 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>; 152 <a name="l00125"></a>00125 <a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html">OutputDescriptor</a> d;
147 <a name="l00126"></a>00126 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; 153 <a name="l00126"></a>00126 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">"logcentroid"</span>;
148 <a name="l00127"></a>00127 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>; 154 <a name="l00127"></a>00127 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">"Log Frequency Centroid"</span>;
149 <a name="l00128"></a>00128 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>; 155 <a name="l00128"></a>00128 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">"Centroid of the log weighted frequency spectrum"</span>;
150 <a name="l00129"></a>00129 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&amp;#39;s block start.">OutputDescriptor::OneSamplePerStep</a>; 156 <a name="l00129"></a>00129 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">"Hz"</span>;
151 <a name="l00130"></a>00130 list.push_back(d); 157 <a name="l00130"></a>00130 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>;
152 <a name="l00131"></a>00131 158 <a name="l00131"></a>00131 d.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#238a4781ebb4151832cbf521feb0fedc" title="The number of values per result of the output.">binCount</a> = 1;
153 <a name="l00132"></a>00132 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>; 159 <a name="l00132"></a>00132 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>;
154 <a name="l00133"></a>00133 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>; 160 <a name="l00133"></a>00133 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>;
155 <a name="l00134"></a>00134 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>; 161 <a name="l00134"></a>00134 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>;
156 <a name="l00135"></a>00135 list.push_back(d); 162 <a name="l00135"></a>00135 list.push_back(d);
157 <a name="l00136"></a>00136 163 <a name="l00136"></a>00136
158 <a name="l00137"></a>00137 <span class="keywordflow">return</span> list; 164 <a name="l00137"></a>00137 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">"linearcentroid"</span>;
159 <a name="l00138"></a>00138 } 165 <a name="l00138"></a>00138 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">"Linear Frequency Centroid"</span>;
160 <a name="l00139"></a>00139 166 <a name="l00139"></a>00139 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">"Centroid of the linear frequency spectrum"</span>;
161 <a name="l00140"></a>00140 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">SpectralCentroid::FeatureSet</a> 167 <a name="l00140"></a>00140 list.push_back(d);
162 <a name="l00141"></a><a class="code" href="classSpectralCentroid.html#ca96c70e7e75c9e4a7db38485018914c">00141</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> timestamp) 168 <a name="l00141"></a>00141
163 <a name="l00142"></a>00142 { 169 <a name="l00142"></a>00142 <span class="keywordflow">return</span> list;
164 <a name="l00143"></a>00143 <span class="keywordflow">if</span> (<a class="code" href="classSpectralCentroid.html#49805a090ba58477da4adbefea4392a7">m_stepSize</a> == 0) { 170 <a name="l00143"></a>00143 }
165 <a name="l00144"></a>00144 cerr &lt;&lt; <span class="stringliteral">"ERROR: SpectralCentroid::process: "</span> 171 <a name="l00144"></a>00144
166 <a name="l00145"></a>00145 &lt;&lt; <span class="stringliteral">"SpectralCentroid has not been initialised"</span> 172 <a name="l00145"></a>00145 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">SpectralCentroid::FeatureSet</a>
167 <a name="l00146"></a>00146 &lt;&lt; endl; 173 <a name="l00146"></a><a class="code" href="classSpectralCentroid.html#ca96c70e7e75c9e4a7db38485018914c">00146</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> timestamp)
168 <a name="l00147"></a>00147 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>(); 174 <a name="l00147"></a>00147 {
169 <a name="l00148"></a>00148 } 175 <a name="l00148"></a>00148 <span class="keywordflow">if</span> (<a class="code" href="classSpectralCentroid.html#49805a090ba58477da4adbefea4392a7">m_stepSize</a> == 0) {
170 <a name="l00149"></a>00149 176 <a name="l00149"></a>00149 cerr &lt;&lt; <span class="stringliteral">"ERROR: SpectralCentroid::process: "</span>
171 <a name="l00150"></a>00150 <span class="keywordtype">double</span> numLin = 0.0, numLog = 0.0, denom = 0.0; 177 <a name="l00150"></a>00150 &lt;&lt; <span class="stringliteral">"SpectralCentroid has not been initialised"</span>
172 <a name="l00151"></a>00151 178 <a name="l00151"></a>00151 &lt;&lt; endl;
173 <a name="l00152"></a>00152 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 1; i &lt;= <a class="code" href="classSpectralCentroid.html#262f583d71b442bb2d80023e7c85aa4e">m_blockSize</a>/2; ++i) { 179 <a name="l00152"></a>00152 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>();
174 <a name="l00153"></a>00153 <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>; 180 <a name="l00153"></a>00153 }
175 <a name="l00154"></a>00154 <span class="keywordtype">double</span> real = inputBuffers[0][i*2]; 181 <a name="l00154"></a>00154
176 <a name="l00155"></a>00155 <span class="keywordtype">double</span> imag = inputBuffers[0][i*2 + 1]; 182 <a name="l00155"></a>00155 <span class="keywordtype">double</span> numLin = 0.0, numLog = 0.0, denom = 0.0;
177 <a name="l00156"></a>00156 <span class="keywordtype">double</span> scalemag = sqrt(real * real + imag * imag) / (<a class="code" href="classSpectralCentroid.html#262f583d71b442bb2d80023e7c85aa4e">m_blockSize</a>/2); 183 <a name="l00156"></a>00156
178 <a name="l00157"></a>00157 numLin += freq * scalemag; 184 <a name="l00157"></a>00157 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 1; i &lt;= <a class="code" href="classSpectralCentroid.html#262f583d71b442bb2d80023e7c85aa4e">m_blockSize</a>/2; ++i) {
179 <a name="l00158"></a>00158 numLog += log10f(freq) * scalemag; 185 <a name="l00158"></a>00158 <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>;
180 <a name="l00159"></a>00159 denom += scalemag; 186 <a name="l00159"></a>00159 <span class="keywordtype">double</span> real = inputBuffers[0][i*2];
181 <a name="l00160"></a>00160 } 187 <a name="l00160"></a>00160 <span class="keywordtype">double</span> imag = inputBuffers[0][i*2 + 1];
182 <a name="l00161"></a>00161 188 <a name="l00161"></a>00161 <span class="keywordtype">double</span> scalemag = sqrt(real * real + imag * imag) / (<a class="code" href="classSpectralCentroid.html#262f583d71b442bb2d80023e7c85aa4e">m_blockSize</a>/2);
183 <a name="l00162"></a>00162 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a> returnFeatures; 189 <a name="l00162"></a>00162 numLin += freq * scalemag;
184 <a name="l00163"></a>00163 190 <a name="l00163"></a>00163 numLog += log10f(freq) * scalemag;
185 <a name="l00164"></a>00164 <span class="keywordflow">if</span> (denom != 0.0) { 191 <a name="l00164"></a>00164 denom += scalemag;
186 <a name="l00165"></a>00165 <span class="keywordtype">float</span> centroidLin = float(numLin / denom); 192 <a name="l00165"></a>00165 }
187 <a name="l00166"></a>00166 <span class="keywordtype">float</span> centroidLog = powf(10, <span class="keywordtype">float</span>(numLog / denom)); 193 <a name="l00166"></a>00166
188 <a name="l00167"></a>00167 194 <a name="l00167"></a>00167 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a> returnFeatures;
189 <a name="l00168"></a>00168 <a class="code" href="structVamp_1_1Plugin_1_1Feature.html">Feature</a> feature; 195 <a name="l00168"></a>00168
190 <a name="l00169"></a>00169 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>; 196 <a name="l00169"></a>00169 <span class="keywordflow">if</span> (denom != 0.0) {
191 <a name="l00170"></a>00170 197 <a name="l00170"></a>00170 <span class="keywordtype">float</span> centroidLin = float(numLin / denom);
192 <a name="l00171"></a>00171 <span class="keywordflow">if</span> (!isnan(centroidLog) &amp;&amp; !isinf(centroidLog)) { 198 <a name="l00171"></a>00171 <span class="keywordtype">float</span> centroidLog = powf(10, <span class="keywordtype">float</span>(numLog / denom));
193 <a name="l00172"></a>00172 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); 199 <a name="l00172"></a>00172
194 <a name="l00173"></a>00173 } 200 <a name="l00173"></a>00173 <a class="code" href="structVamp_1_1Plugin_1_1Feature.html">Feature</a> feature;
195 <a name="l00174"></a>00174 returnFeatures[0].push_back(feature); 201 <a name="l00174"></a>00174 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>;
196 <a name="l00175"></a>00175 202 <a name="l00175"></a>00175
197 <a name="l00176"></a>00176 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#60b9f3057386820dbcaec0eb1189ce71" title="Results for a single sample of this feature.">values</a>.clear(); 203 <a name="l00176"></a>00176 <span class="keywordflow">if</span> (!isnan(centroidLog) &amp;&amp; !isinf(centroidLog)) {
198 <a name="l00177"></a>00177 <span class="keywordflow">if</span> (!isnan(centroidLin) &amp;&amp; !isinf(centroidLin)) { 204 <a name="l00177"></a>00177 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(centroidLog);
199 <a name="l00178"></a>00178 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); 205 <a name="l00178"></a>00178 }
200 <a name="l00179"></a>00179 } 206 <a name="l00179"></a>00179 returnFeatures[0].push_back(feature);
201 <a name="l00180"></a>00180 returnFeatures[1].push_back(feature); 207 <a name="l00180"></a>00180
202 <a name="l00181"></a>00181 } 208 <a name="l00181"></a>00181 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#106162977cdc92a02146fcb5ed18a34d" title="Results for a single sample of this feature.">values</a>.clear();
203 <a name="l00182"></a>00182 209 <a name="l00182"></a>00182 <span class="keywordflow">if</span> (!isnan(centroidLin) &amp;&amp; !isinf(centroidLin)) {
204 <a name="l00183"></a>00183 <span class="keywordflow">return</span> returnFeatures; 210 <a name="l00183"></a>00183 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(centroidLin);
205 <a name="l00184"></a>00184 } 211 <a name="l00184"></a>00184 }
206 <a name="l00185"></a>00185 212 <a name="l00185"></a>00185 returnFeatures[1].push_back(feature);
207 <a name="l00186"></a>00186 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">SpectralCentroid::FeatureSet</a> 213 <a name="l00186"></a>00186 }
208 <a name="l00187"></a><a class="code" href="classSpectralCentroid.html#83ba39f0870a2f86837605a958dfab1a">00187</a> <a class="code" href="classSpectralCentroid.html#83ba39f0870a2f86837605a958dfab1a" title="After all blocks have been processed, calculate and return any remaining features...">SpectralCentroid::getRemainingFeatures</a>() 214 <a name="l00187"></a>00187
209 <a name="l00188"></a>00188 { 215 <a name="l00188"></a>00188 <span class="keywordflow">return</span> returnFeatures;
210 <a name="l00189"></a>00189 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>(); 216 <a name="l00189"></a>00189 }
211 <a name="l00190"></a>00190 } 217 <a name="l00190"></a>00190
212 <a name="l00191"></a>00191 218 <a name="l00191"></a>00191 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">SpectralCentroid::FeatureSet</a>
219 <a name="l00192"></a><a class="code" href="classSpectralCentroid.html#83ba39f0870a2f86837605a958dfab1a">00192</a> <a class="code" href="classSpectralCentroid.html#83ba39f0870a2f86837605a958dfab1a" title="After all blocks have been processed, calculate and return any remaining features...">SpectralCentroid::getRemainingFeatures</a>()
220 <a name="l00193"></a>00193 {
221 <a name="l00194"></a>00194 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>();
222 <a name="l00195"></a>00195 }
223 <a name="l00196"></a>00196
213 </pre></div></div> 224 </pre></div></div>
214 <hr size="1"><address style="text-align: right;"><small>Generated on Mon Dec 8 14:37:18 2008 for VampPluginSDK by&nbsp; 225 <hr size="1"><address style="text-align: right;"><small>Generated on Thu Sep 24 13:40:13 2009 for VampPluginSDK by&nbsp;
215 <a href="http://www.doxygen.org/index.html"> 226 <a href="http://www.doxygen.org/index.html">
216 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address> 227 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.8 </small></address>
217 </body> 228 </body>
218 </html> 229 </html>