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Add a page about the Vamp Plugin Pack, including links to download mirrors
| author | Chris Cannam |
|---|---|
| date | Tue, 11 Aug 2020 16:41:11 +0100 |
| parents | 8260c0f4e05b |
| children |
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>VampPluginSDK: ZeroCrossing.cpp Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="doxygen.css" rel="stylesheet" type="text/css" /> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); </script> </head> <body> <div id="top"><!-- do not remove this div! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">VampPluginSDK  <span id="projectnumber">2.1</span> </div> </td> </tr> </tbody> </table> </div> <!-- Generated by Doxygen 1.7.5.1 --> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.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 id="navrow2" class="tabs2"> <ul class="tablist"> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>File Members</span></a></li> </ul> </div> </div> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> initNavTree('ZeroCrossing_8cpp.html',''); </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">ZeroCrossing.cpp</div> </div> </div> <div class="contents"> <a href="ZeroCrossing_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="ZeroCrossing_8h.html">ZeroCrossing.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><a class="code" href="classZeroCrossing.html#a9855153a54bdc9ba75cc1a705a149473">00046</a> <a class="code" href="classZeroCrossing.html#a9855153a54bdc9ba75cc1a705a149473">ZeroCrossing::ZeroCrossing</a>(<span class="keywordtype">float</span> inputSampleRate) : <a name="l00047"></a>00047 Plugin(inputSampleRate), <a name="l00048"></a>00048 m_stepSize(0), <a name="l00049"></a>00049 m_previousSample(0.0f) <a name="l00050"></a>00050 { <a name="l00051"></a>00051 } <a name="l00052"></a>00052 <a name="l00053"></a><a class="code" href="classZeroCrossing.html#af1de0da862e6e2443581e4e16044675b">00053</a> <a class="code" href="classZeroCrossing.html#af1de0da862e6e2443581e4e16044675b">ZeroCrossing::~ZeroCrossing</a>() <a name="l00054"></a>00054 { <a name="l00055"></a>00055 } <a name="l00056"></a>00056 <a name="l00057"></a>00057 <span class="keywordtype">string</span> <a name="l00058"></a><a class="code" href="classZeroCrossing.html#af2baf9e19fcdd11cfe97ace56d4f5c1a">00058</a> <a class="code" href="classZeroCrossing.html#af2baf9e19fcdd11cfe97ace56d4f5c1a" title="Get the computer-usable name of the plugin.">ZeroCrossing::getIdentifier</a>()<span class="keyword"> const</span> <a name="l00059"></a>00059 <span class="keyword"></span>{ <a name="l00060"></a>00060 <span class="keywordflow">return</span> <span class="stringliteral">"zerocrossing"</span>; <a name="l00061"></a>00061 } <a name="l00062"></a>00062 <a name="l00063"></a>00063 <span class="keywordtype">string</span> <a name="l00064"></a><a class="code" href="classZeroCrossing.html#afa96f7ce6e7d9f03768f48c6a9d88498">00064</a> <a class="code" href="classZeroCrossing.html#afa96f7ce6e7d9f03768f48c6a9d88498" title="Get a human-readable name or title of the plugin.">ZeroCrossing::getName</a>()<span class="keyword"> const</span> <a name="l00065"></a>00065 <span class="keyword"></span>{ <a name="l00066"></a>00066 <span class="keywordflow">return</span> <span class="stringliteral">"Zero Crossings"</span>; <a name="l00067"></a>00067 } <a name="l00068"></a>00068 <a name="l00069"></a>00069 <span class="keywordtype">string</span> <a name="l00070"></a><a class="code" href="classZeroCrossing.html#a710bb0b013157adaeef2a9e6867b4478">00070</a> <a class="code" href="classZeroCrossing.html#a710bb0b013157adaeef2a9e6867b4478" title="Get a human-readable description for the plugin, typically a line of text that may optionally be disp...">ZeroCrossing::getDescription</a>()<span class="keyword"> const</span> <a name="l00071"></a>00071 <span class="keyword"></span>{ <a name="l00072"></a>00072 <span class="keywordflow">return</span> <span class="stringliteral">"Detect and count zero crossing points"</span>; <a name="l00073"></a>00073 } <a name="l00074"></a>00074 <a name="l00075"></a>00075 <span class="keywordtype">string</span> <a name="l00076"></a><a class="code" href="classZeroCrossing.html#ac68561634a3c329a029c2fd3deaeae2a">00076</a> <a class="code" href="classZeroCrossing.html#ac68561634a3c329a029c2fd3deaeae2a" title="Get the name of the author or vendor of the plugin in human-readable form.">ZeroCrossing::getMaker</a>()<span class="keyword"> const</span> <a name="l00077"></a>00077 <span class="keyword"></span>{ <a name="l00078"></a>00078 <span class="keywordflow">return</span> <span class="stringliteral">"Vamp SDK Example Plugins"</span>; <a name="l00079"></a>00079 } <a name="l00080"></a>00080 <a name="l00081"></a>00081 <span class="keywordtype">int</span> <a name="l00082"></a><a class="code" href="classZeroCrossing.html#ad685f6c2f443f07a1634550c335571eb">00082</a> <a class="code" href="classZeroCrossing.html#ad685f6c2f443f07a1634550c335571eb" title="Get the version number of the plugin.">ZeroCrossing::getPluginVersion</a>()<span class="keyword"> const</span> <a name="l00083"></a>00083 <span class="keyword"></span>{ <a name="l00084"></a>00084 <span class="keywordflow">return</span> 2; <a name="l00085"></a>00085 } <a name="l00086"></a>00086 <a name="l00087"></a>00087 <span class="keywordtype">string</span> <a name="l00088"></a><a class="code" href="classZeroCrossing.html#af9c41b92aa8ff8bddaebf75569ff789c">00088</a> <a class="code" href="classZeroCrossing.html#af9c41b92aa8ff8bddaebf75569ff789c" title="Get the copyright statement or licensing summary for the plugin.">ZeroCrossing::getCopyright</a>()<span class="keyword"> const</span> <a name="l00089"></a>00089 <span class="keyword"></span>{ <a name="l00090"></a>00090 <span class="keywordflow">return</span> <span class="stringliteral">"Freely redistributable (BSD license)"</span>; <a name="l00091"></a>00091 } <a name="l00092"></a>00092 <a name="l00093"></a>00093 <span class="keywordtype">bool</span> <a name="l00094"></a><a class="code" href="classZeroCrossing.html#af21bbcc87a6eb7875dfab7d86222dccc">00094</a> <a class="code" href="classZeroCrossing.html#af21bbcc87a6eb7875dfab7d86222dccc" title="Initialise a plugin to prepare it for use with the given number of input channels, step size (window increment, in sample frames) and block size (window size, in sample frames).">ZeroCrossing::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="l00095"></a>00095 { <a name="l00096"></a>00096 <span class="keywordflow">if</span> (channels < <a class="code" href="classVamp_1_1Plugin.html#a267b42e866df3cf0d190893e8096f525" title="Get the minimum supported number of input channels.">getMinChannelCount</a>() || <a name="l00097"></a>00097 channels > <a class="code" href="classVamp_1_1Plugin.html#a2c5ab12b6fa4847cb244bd1e9cb3ae5e" title="Get the maximum supported number of input channels.">getMaxChannelCount</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>; <a name="l00098"></a>00098 <a name="l00099"></a>00099 <a class="code" href="classZeroCrossing.html#a584f100b87c78f9af9da040d79567d52">m_stepSize</a> = std::min(stepSize, blockSize); <a name="l00100"></a>00100 <a name="l00101"></a>00101 <span class="keywordflow">return</span> <span class="keyword">true</span>; <a name="l00102"></a>00102 } <a name="l00103"></a>00103 <a name="l00104"></a>00104 <span class="keywordtype">void</span> <a name="l00105"></a><a class="code" href="classZeroCrossing.html#a9ae6c4a31ea027dceb1e97ead807e228">00105</a> <a class="code" href="classZeroCrossing.html#a9ae6c4a31ea027dceb1e97ead807e228" title="Reset the plugin after use, to prepare it for another clean run.">ZeroCrossing::reset</a>() <a name="l00106"></a>00106 { <a name="l00107"></a>00107 <a class="code" href="classZeroCrossing.html#a0f2d9f2cab0a8a30344e1f2c0ebb8ee8">m_previousSample</a> = 0.0f; <a name="l00108"></a>00108 } <a name="l00109"></a>00109 <a name="l00110"></a>00110 <a class="code" href="classVamp_1_1Plugin.html#a30f531b8fb69fac41a24e3d2a6a08ed9">ZeroCrossing::OutputList</a> <a name="l00111"></a><a class="code" href="classZeroCrossing.html#ac9d590a6feb1fc9a37d7892aefe2b688">00111</a> <a class="code" href="classZeroCrossing.html#ac9d590a6feb1fc9a37d7892aefe2b688" title="Get the outputs of this plugin.">ZeroCrossing::getOutputDescriptors</a>()<span class="keyword"> const</span> <a name="l00112"></a>00112 <span class="keyword"></span>{ <a name="l00113"></a>00113 <a class="code" href="classVamp_1_1Plugin.html#a30f531b8fb69fac41a24e3d2a6a08ed9">OutputList</a> list; <a name="l00114"></a>00114 <a name="l00115"></a>00115 <a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html">OutputDescriptor</a> zc; <a name="l00116"></a>00116 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#ae2c893ddb1860589517ab7eaa989a18b" title="The name of the output, in computer-usable form.">identifier</a> = <span class="stringliteral">"counts"</span>; <a name="l00117"></a>00117 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#ab824b2b34ee50f897a30901c620e8d87" title="The human-readable name of the output.">name</a> = <span class="stringliteral">"Zero Crossing Counts"</span>; <a name="l00118"></a>00118 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#af9b4fe8f78e7126ead820ba5dc55efd1" title="A human-readable short text describing the output.">description</a> = <span class="stringliteral">"The number of zero crossing points per processing block"</span>; <a name="l00119"></a>00119 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#aa057a8833fa037f06ac9f7b85b85d5e4" title="The unit of the output, in human-readable form.">unit</a> = <span class="stringliteral">"crossings"</span>; <a name="l00120"></a>00120 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#af0e577e1a256ff6eed6ea42133fec77d" 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="l00121"></a>00121 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#afdd006959a995e40ef7d565a3a4df6dc" title="The number of values per result of the output.">binCount</a> = 1; <a name="l00122"></a>00122 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#ae9ccb65f99f477096b65dd031f4c5e31" title="True if the results in each output bin fall within a fixed numeric range (minimum and maximum values)...">hasKnownExtents</a> = <span class="keyword">false</span>; <a name="l00123"></a>00123 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#a1b4858928d23bfd7d5bc557c82a83fb4" title="True if the output values are quantized to a particular resolution.">isQuantized</a> = <span class="keyword">true</span>; <a name="l00124"></a>00124 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#a3bed37153067b625b95acb40b60dbf0b" title="Quantization resolution of the output values (e.g.">quantizeStep</a> = 1.0; <a name="l00125"></a>00125 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#a0d1194980d44e31b25ef3b4b070d6b5d" title="Positioning in time of the output results.">sampleType</a> = <a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#abffa9ed50cd756df70fd51f0355f448ca0459d5d0d2198d21e8bc90abe4fdccca" title="Results from each process() align with that call's block start.">OutputDescriptor::OneSamplePerStep</a>; <a name="l00126"></a>00126 list.push_back(zc); <a name="l00127"></a>00127 <a name="l00128"></a>00128 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#ae2c893ddb1860589517ab7eaa989a18b" title="The name of the output, in computer-usable form.">identifier</a> = <span class="stringliteral">"zerocrossings"</span>; <a name="l00129"></a>00129 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#ab824b2b34ee50f897a30901c620e8d87" title="The human-readable name of the output.">name</a> = <span class="stringliteral">"Zero Crossings"</span>; <a name="l00130"></a>00130 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#af9b4fe8f78e7126ead820ba5dc55efd1" title="A human-readable short text describing the output.">description</a> = <span class="stringliteral">"The locations of zero crossing points"</span>; <a name="l00131"></a>00131 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#aa057a8833fa037f06ac9f7b85b85d5e4" title="The unit of the output, in human-readable form.">unit</a> = <span class="stringliteral">""</span>; <a name="l00132"></a>00132 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#af0e577e1a256ff6eed6ea42133fec77d" 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="l00133"></a>00133 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#afdd006959a995e40ef7d565a3a4df6dc" title="The number of values per result of the output.">binCount</a> = 0; <a name="l00134"></a>00134 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#a0d1194980d44e31b25ef3b4b070d6b5d" title="Positioning in time of the output results.">sampleType</a> = <a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#abffa9ed50cd756df70fd51f0355f448cadea995a737867f7b22b52f1c43c5432e" title="Results are unevenly spaced and have individual timestamps.">OutputDescriptor::VariableSampleRate</a>; <a name="l00135"></a>00135 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#add0cbbdfa9c91764037c39365b1d42af" title="Sample rate of the output results, as samples per second.">sampleRate</a> = <a class="code" href="classVamp_1_1Plugin.html#a59b9dd82a4f4eb946cd0474cc81abc23">m_inputSampleRate</a>; <a name="l00136"></a>00136 list.push_back(zc); <a name="l00137"></a>00137 <a name="l00138"></a>00138 <span class="keywordflow">return</span> list; <a name="l00139"></a>00139 } <a name="l00140"></a>00140 <a name="l00141"></a>00141 <a class="code" href="classVamp_1_1Plugin.html#a448fb57dc245d47923ec9eeaf9856c5f">ZeroCrossing::FeatureSet</a> <a name="l00142"></a><a class="code" href="classZeroCrossing.html#abf4aaa6fd8cc03de63f4e1e8942633da">00142</a> <a class="code" href="classZeroCrossing.html#abf4aaa6fd8cc03de63f4e1e8942633da" title="Process a single block of input data.">ZeroCrossing::process</a>(<span class="keyword">const</span> <span class="keywordtype">float</span> *<span class="keyword">const</span> *inputBuffers, <a name="l00143"></a>00143 <a class="code" href="structVamp_1_1RealTime.html" title="RealTime represents time values to nanosecond precision with accurate arithmetic and frame-rate conve...">Vamp::RealTime</a> timestamp) <a name="l00144"></a>00144 { <a name="l00145"></a>00145 <span class="keywordflow">if</span> (<a class="code" href="classZeroCrossing.html#a584f100b87c78f9af9da040d79567d52">m_stepSize</a> == 0) { <a name="l00146"></a>00146 cerr << <span class="stringliteral">"ERROR: ZeroCrossing::process: "</span> <a name="l00147"></a>00147 << <span class="stringliteral">"ZeroCrossing has not been initialised"</span> <a name="l00148"></a>00148 << endl; <a name="l00149"></a>00149 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#a448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>(); <a name="l00150"></a>00150 } <a name="l00151"></a>00151 <a name="l00152"></a>00152 <span class="keywordtype">float</span> prev = <a class="code" href="classZeroCrossing.html#a0f2d9f2cab0a8a30344e1f2c0ebb8ee8">m_previousSample</a>; <a name="l00153"></a>00153 <span class="keywordtype">size_t</span> count = 0; <a name="l00154"></a>00154 <a name="l00155"></a>00155 <a class="code" href="classVamp_1_1Plugin.html#a448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a> returnFeatures; <a name="l00156"></a>00156 <a name="l00157"></a>00157 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < <a class="code" href="classZeroCrossing.html#a584f100b87c78f9af9da040d79567d52">m_stepSize</a>; ++i) { <a name="l00158"></a>00158 <a name="l00159"></a>00159 <span class="keywordtype">float</span> sample = inputBuffers[0][i]; <a name="l00160"></a>00160 <span class="keywordtype">bool</span> crossing = <span class="keyword">false</span>; <a name="l00161"></a>00161 <a name="l00162"></a>00162 <span class="keywordflow">if</span> (sample <= 0.0) { <a name="l00163"></a>00163 <span class="keywordflow">if</span> (prev > 0.0) crossing = <span class="keyword">true</span>; <a name="l00164"></a>00164 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (sample > 0.0) { <a name="l00165"></a>00165 <span class="keywordflow">if</span> (prev <= 0.0) crossing = <span class="keyword">true</span>; <a name="l00166"></a>00166 } <a name="l00167"></a>00167 <a name="l00168"></a>00168 <span class="keywordflow">if</span> (crossing) { <a name="l00169"></a>00169 ++count; <a name="l00170"></a>00170 <a class="code" href="structVamp_1_1Plugin_1_1Feature.html">Feature</a> feature; <a name="l00171"></a>00171 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#a98907091d0b6a589720ae35ae588a82b" title="True if an output feature has its own timestamp.">hasTimestamp</a> = <span class="keyword">true</span>; <a name="l00172"></a>00172 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#acaa605f36839c07e76f4882f5e22d8d7" title="Timestamp of the output feature.">timestamp</a> = timestamp + <a name="l00173"></a>00173 <a class="code" href="structVamp_1_1RealTime.html#a939b4b1d1ca190db69a418883f16ce8a" title="Convert a sample frame at the given sample rate into a RealTime.">Vamp::RealTime::frame2RealTime</a>(i, (<span class="keywordtype">size_t</span>)<a class="code" href="classVamp_1_1Plugin.html#a59b9dd82a4f4eb946cd0474cc81abc23">m_inputSampleRate</a>); <a name="l00174"></a>00174 returnFeatures[1].push_back(feature); <a name="l00175"></a>00175 } <a name="l00176"></a>00176 <a name="l00177"></a>00177 prev = sample; <a name="l00178"></a>00178 } <a name="l00179"></a>00179 <a name="l00180"></a>00180 <a class="code" href="classZeroCrossing.html#a0f2d9f2cab0a8a30344e1f2c0ebb8ee8">m_previousSample</a> = prev; <a name="l00181"></a>00181 <a name="l00182"></a>00182 <a class="code" href="structVamp_1_1Plugin_1_1Feature.html">Feature</a> feature; <a name="l00183"></a>00183 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#a98907091d0b6a589720ae35ae588a82b" title="True if an output feature has its own timestamp.">hasTimestamp</a> = <span class="keyword">false</span>; <a name="l00184"></a>00184 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#a60b9f3057386820dbcaec0eb1189ce71" title="Results for a single sample of this feature.">values</a>.push_back(<span class="keywordtype">float</span>(count)); <a name="l00185"></a>00185 <a name="l00186"></a>00186 returnFeatures[0].push_back(feature); <a name="l00187"></a>00187 <span class="keywordflow">return</span> returnFeatures; <a name="l00188"></a>00188 } <a name="l00189"></a>00189 <a name="l00190"></a>00190 <a class="code" href="classVamp_1_1Plugin.html#a448fb57dc245d47923ec9eeaf9856c5f">ZeroCrossing::FeatureSet</a> <a name="l00191"></a><a class="code" href="classZeroCrossing.html#a70996d1b7166e303903daf92a9a37ad8">00191</a> <a class="code" href="classZeroCrossing.html#a70996d1b7166e303903daf92a9a37ad8" title="After all blocks have been processed, calculate and return any remaining features derived from the co...">ZeroCrossing::getRemainingFeatures</a>() <a name="l00192"></a>00192 { <a name="l00193"></a>00193 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#a448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>(); <a name="l00194"></a>00194 } <a name="l00195"></a>00195 </pre></div></div> </div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="ZeroCrossing_8cpp.html">ZeroCrossing.cpp</a> </li> <li class="footer">Generated on Tue Oct 4 2011 14:38:49 for VampPluginSDK by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.5.1 </li> </ul> </div> </body> </html>