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2 <html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
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3 <title>VampPluginSDK: ZeroCrossing.cpp Source File</title>
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11 <li><a href="main.html"><span>Main Page</span></a></li>
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24 <div class="navpath"><a class="el" href="dir_35887283b966ca996e4ff77f459c38ce.html">examples</a>
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25 </div>
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26 </div>
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27 <div class="contents">
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28 <h1>ZeroCrossing.cpp</h1><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>
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29 <a name="l00002"></a>00002
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30 <a name="l00003"></a>00003 <span class="comment">/*</span>
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31 <a name="l00004"></a>00004 <span class="comment"> Vamp</span>
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32 <a name="l00005"></a>00005 <span class="comment"></span>
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33 <a name="l00006"></a>00006 <span class="comment"> An API for audio analysis and feature extraction plugins.</span>
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34 <a name="l00007"></a>00007 <span class="comment"></span>
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35 <a name="l00008"></a>00008 <span class="comment"> Centre for Digital Music, Queen Mary, University of London.</span>
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36 <a name="l00009"></a>00009 <span class="comment"> Copyright 2006 Chris Cannam.</span>
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37 <a name="l00010"></a>00010 <span class="comment"> </span>
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38 <a name="l00011"></a>00011 <span class="comment"> Permission is hereby granted, free of charge, to any person</span>
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39 <a name="l00012"></a>00012 <span class="comment"> obtaining a copy of this software and associated documentation</span>
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40 <a name="l00013"></a>00013 <span class="comment"> files (the "Software"), to deal in the Software without</span>
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41 <a name="l00014"></a>00014 <span class="comment"> restriction, including without limitation the rights to use, copy,</span>
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42 <a name="l00015"></a>00015 <span class="comment"> modify, merge, publish, distribute, sublicense, and/or sell copies</span>
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43 <a name="l00016"></a>00016 <span class="comment"> of the Software, and to permit persons to whom the Software is</span>
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44 <a name="l00017"></a>00017 <span class="comment"> furnished to do so, subject to the following conditions:</span>
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45 <a name="l00018"></a>00018 <span class="comment"></span>
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46 <a name="l00019"></a>00019 <span class="comment"> The above copyright notice and this permission notice shall be</span>
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47 <a name="l00020"></a>00020 <span class="comment"> included in all copies or substantial portions of the Software.</span>
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48 <a name="l00021"></a>00021 <span class="comment"></span>
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49 <a name="l00022"></a>00022 <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span>
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50 <a name="l00023"></a>00023 <span class="comment"> EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span>
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51 <a name="l00024"></a>00024 <span class="comment"> MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span>
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52 <a name="l00025"></a>00025 <span class="comment"> NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR</span>
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53 <a name="l00026"></a>00026 <span class="comment"> ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF</span>
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54 <a name="l00027"></a>00027 <span class="comment"> CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION</span>
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55 <a name="l00028"></a>00028 <span class="comment"> WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span>
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56 <a name="l00029"></a>00029 <span class="comment"></span>
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57 <a name="l00030"></a>00030 <span class="comment"> Except as contained in this notice, the names of the Centre for</span>
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58 <a name="l00031"></a>00031 <span class="comment"> Digital Music; Queen Mary, University of London; and Chris Cannam</span>
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59 <a name="l00032"></a>00032 <span class="comment"> shall not be used in advertising or otherwise to promote the sale,</span>
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60 <a name="l00033"></a>00033 <span class="comment"> use or other dealings in this Software without prior written</span>
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61 <a name="l00034"></a>00034 <span class="comment"> authorization.</span>
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62 <a name="l00035"></a>00035 <span class="comment">*/</span>
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63 <a name="l00036"></a>00036
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64 <a name="l00037"></a>00037 <span class="preprocessor">#include "<a class="code" href="ZeroCrossing_8h.html">ZeroCrossing.h</a>"</span>
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65 <a name="l00038"></a>00038
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66 <a name="l00039"></a>00039 <span class="keyword">using</span> std::string;
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67 <a name="l00040"></a>00040 <span class="keyword">using</span> std::vector;
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68 <a name="l00041"></a>00041 <span class="keyword">using</span> std::cerr;
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69 <a name="l00042"></a>00042 <span class="keyword">using</span> std::endl;
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70 <a name="l00043"></a>00043
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71 <a name="l00044"></a>00044 <span class="preprocessor">#include <cmath></span>
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72 <a name="l00045"></a>00045
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73 <a name="l00046"></a><a class="code" href="classZeroCrossing.html#9855153a54bdc9ba75cc1a705a149473">00046</a> <a class="code" href="classZeroCrossing.html#9855153a54bdc9ba75cc1a705a149473">ZeroCrossing::ZeroCrossing</a>(<span class="keywordtype">float</span> inputSampleRate) :
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74 <a name="l00047"></a>00047 Plugin(inputSampleRate),
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75 <a name="l00048"></a>00048 m_stepSize(0),
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76 <a name="l00049"></a>00049 m_previousSample(0.0f)
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77 <a name="l00050"></a>00050 {
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78 <a name="l00051"></a>00051 }
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79 <a name="l00052"></a>00052
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80 <a name="l00053"></a><a class="code" href="classZeroCrossing.html#f1de0da862e6e2443581e4e16044675b">00053</a> <a class="code" href="classZeroCrossing.html#f1de0da862e6e2443581e4e16044675b">ZeroCrossing::~ZeroCrossing</a>()
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81 <a name="l00054"></a>00054 {
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82 <a name="l00055"></a>00055 }
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83 <a name="l00056"></a>00056
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84 <a name="l00057"></a>00057 <span class="keywordtype">string</span>
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85 <a name="l00058"></a><a class="code" href="classZeroCrossing.html#f2baf9e19fcdd11cfe97ace56d4f5c1a">00058</a> <a class="code" href="classZeroCrossing.html#f2baf9e19fcdd11cfe97ace56d4f5c1a" title="Get the computer-usable name of the plugin.">ZeroCrossing::getIdentifier</a>()<span class="keyword"> const</span>
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86 <a name="l00059"></a>00059 <span class="keyword"></span>{
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87 <a name="l00060"></a>00060 <span class="keywordflow">return</span> <span class="stringliteral">"zerocrossing"</span>;
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88 <a name="l00061"></a>00061 }
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89 <a name="l00062"></a>00062
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90 <a name="l00063"></a>00063 <span class="keywordtype">string</span>
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91 <a name="l00064"></a><a class="code" href="classZeroCrossing.html#fa96f7ce6e7d9f03768f48c6a9d88498">00064</a> <a class="code" href="classZeroCrossing.html#fa96f7ce6e7d9f03768f48c6a9d88498" title="Get a human-readable name or title of the plugin.">ZeroCrossing::getName</a>()<span class="keyword"> const</span>
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92 <a name="l00065"></a>00065 <span class="keyword"></span>{
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93 <a name="l00066"></a>00066 <span class="keywordflow">return</span> <span class="stringliteral">"Zero Crossings"</span>;
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94 <a name="l00067"></a>00067 }
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95 <a name="l00068"></a>00068
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96 <a name="l00069"></a>00069 <span class="keywordtype">string</span>
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97 <a name="l00070"></a><a class="code" href="classZeroCrossing.html#710bb0b013157adaeef2a9e6867b4478">00070</a> <a class="code" href="classZeroCrossing.html#710bb0b013157adaeef2a9e6867b4478" title="Get a human-readable description for the plugin, typically a line of text that may...">ZeroCrossing::getDescription</a>()<span class="keyword"> const</span>
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98 <a name="l00071"></a>00071 <span class="keyword"></span>{
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99 <a name="l00072"></a>00072 <span class="keywordflow">return</span> <span class="stringliteral">"Detect and count zero crossing points"</span>;
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100 <a name="l00073"></a>00073 }
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101 <a name="l00074"></a>00074
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102 <a name="l00075"></a>00075 <span class="keywordtype">string</span>
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cannam@21
|
103 <a name="l00076"></a><a class="code" href="classZeroCrossing.html#c68561634a3c329a029c2fd3deaeae2a">00076</a> <a class="code" href="classZeroCrossing.html#c68561634a3c329a029c2fd3deaeae2a" title="Get the name of the author or vendor of the plugin in human-readable form.">ZeroCrossing::getMaker</a>()<span class="keyword"> const</span>
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104 <a name="l00077"></a>00077 <span class="keyword"></span>{
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105 <a name="l00078"></a>00078 <span class="keywordflow">return</span> <span class="stringliteral">"Vamp SDK Example Plugins"</span>;
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106 <a name="l00079"></a>00079 }
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107 <a name="l00080"></a>00080
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|
108 <a name="l00081"></a>00081 <span class="keywordtype">int</span>
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109 <a name="l00082"></a><a class="code" href="classZeroCrossing.html#d685f6c2f443f07a1634550c335571eb">00082</a> <a class="code" href="classZeroCrossing.html#d685f6c2f443f07a1634550c335571eb" title="Get the version number of the plugin.">ZeroCrossing::getPluginVersion</a>()<span class="keyword"> const</span>
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110 <a name="l00083"></a>00083 <span class="keyword"></span>{
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111 <a name="l00084"></a>00084 <span class="keywordflow">return</span> 2;
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112 <a name="l00085"></a>00085 }
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113 <a name="l00086"></a>00086
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114 <a name="l00087"></a>00087 <span class="keywordtype">string</span>
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|
115 <a name="l00088"></a><a class="code" href="classZeroCrossing.html#f9c41b92aa8ff8bddaebf75569ff789c">00088</a> <a class="code" href="classZeroCrossing.html#f9c41b92aa8ff8bddaebf75569ff789c" title="Get the copyright statement or licensing summary for the plugin.">ZeroCrossing::getCopyright</a>()<span class="keyword"> const</span>
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116 <a name="l00089"></a>00089 <span class="keyword"></span>{
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117 <a name="l00090"></a>00090 <span class="keywordflow">return</span> <span class="stringliteral">"Freely redistributable (BSD license)"</span>;
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118 <a name="l00091"></a>00091 }
|
|
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119 <a name="l00092"></a>00092
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|
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120 <a name="l00093"></a>00093 <span class="keywordtype">bool</span>
|
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121 <a name="l00094"></a><a class="code" href="classZeroCrossing.html#f21bbcc87a6eb7875dfab7d86222dccc">00094</a> <a class="code" href="classZeroCrossing.html#f21bbcc87a6eb7875dfab7d86222dccc" title="Initialise a plugin to prepare it for use with the given number of input channels...">ZeroCrossing::initialise</a>(<span class="keywordtype">size_t</span> channels, <span class="keywordtype">size_t</span> stepSize, <span class="keywordtype">size_t</span> blockSize)
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122 <a name="l00095"></a>00095 {
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123 <a name="l00096"></a>00096 <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>() ||
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124 <a name="l00097"></a>00097 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>;
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125 <a name="l00098"></a>00098
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126 <a name="l00099"></a>00099 <a class="code" href="classZeroCrossing.html#584f100b87c78f9af9da040d79567d52">m_stepSize</a> = std::min(stepSize, blockSize);
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127 <a name="l00100"></a>00100
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128 <a name="l00101"></a>00101 <span class="keywordflow">return</span> <span class="keyword">true</span>;
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129 <a name="l00102"></a>00102 }
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130 <a name="l00103"></a>00103
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131 <a name="l00104"></a>00104 <span class="keywordtype">void</span>
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132 <a name="l00105"></a><a class="code" href="classZeroCrossing.html#9ae6c4a31ea027dceb1e97ead807e228">00105</a> <a class="code" href="classZeroCrossing.html#9ae6c4a31ea027dceb1e97ead807e228" title="Reset the plugin after use, to prepare it for another clean run.">ZeroCrossing::reset</a>()
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133 <a name="l00106"></a>00106 {
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134 <a name="l00107"></a>00107 <a class="code" href="classZeroCrossing.html#0f2d9f2cab0a8a30344e1f2c0ebb8ee8">m_previousSample</a> = 0.0f;
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135 <a name="l00108"></a>00108 }
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|
136 <a name="l00109"></a>00109
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|
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|
137 <a name="l00110"></a>00110 <a class="code" href="classVamp_1_1Plugin.html#30f531b8fb69fac41a24e3d2a6a08ed9">ZeroCrossing::OutputList</a>
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138 <a name="l00111"></a><a class="code" href="classZeroCrossing.html#c9d590a6feb1fc9a37d7892aefe2b688">00111</a> <a class="code" href="classZeroCrossing.html#c9d590a6feb1fc9a37d7892aefe2b688" title="Get the outputs of this plugin.">ZeroCrossing::getOutputDescriptors</a>()<span class="keyword"> const</span>
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139 <a name="l00112"></a>00112 <span class="keyword"></span>{
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140 <a name="l00113"></a>00113 <a class="code" href="classVamp_1_1Plugin.html#30f531b8fb69fac41a24e3d2a6a08ed9">OutputList</a> list;
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141 <a name="l00114"></a>00114
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|
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142 <a name="l00115"></a>00115 <a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html">OutputDescriptor</a> zc;
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|
143 <a name="l00116"></a>00116 zc.<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">"counts"</span>;
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144 <a name="l00117"></a>00117 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#0992e05ea70425878365ba85663400a7" title="The human-readable name of the output.">name</a> = <span class="stringliteral">"Zero Crossing Counts"</span>;
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145 <a name="l00118"></a>00118 zc.<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">"The number of zero crossing points per processing block"</span>;
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146 <a name="l00119"></a>00119 zc.<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">"crossings"</span>;
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147 <a name="l00120"></a>00120 zc.<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>;
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148 <a name="l00121"></a>00121 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#238a4781ebb4151832cbf521feb0fedc" title="The number of values per result of the output.">binCount</a> = 1;
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149 <a name="l00122"></a>00122 zc.<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>;
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150 <a name="l00123"></a>00123 zc.<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">true</span>;
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cannam@35
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151 <a name="l00124"></a>00124 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#674cd333889514cf8408c18762fede12" title="Quantization resolution of the output values (e.g.">quantizeStep</a> = 1.0;
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152 <a name="l00125"></a>00125 zc.<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&#39;s block start.">OutputDescriptor::OneSamplePerStep</a>;
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153 <a name="l00126"></a>00126 list.push_back(zc);
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154 <a name="l00127"></a>00127
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155 <a name="l00128"></a>00128 zc.<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">"zerocrossings"</span>;
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156 <a name="l00129"></a>00129 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#0992e05ea70425878365ba85663400a7" title="The human-readable name of the output.">name</a> = <span class="stringliteral">"Zero Crossings"</span>;
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157 <a name="l00130"></a>00130 zc.<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">"The locations of zero crossing points"</span>;
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158 <a name="l00131"></a>00131 zc.<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>;
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159 <a name="l00132"></a>00132 zc.<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>;
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160 <a name="l00133"></a>00133 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#238a4781ebb4151832cbf521feb0fedc" title="The number of values per result of the output.">binCount</a> = 0;
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161 <a name="l00134"></a>00134 zc.<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#bffa9ed50cd756df70fd51f0355f448c95be613508cf4009a7dc2f70ddf99547" title="Results are unevenly spaced and have individual timestamps.">OutputDescriptor::VariableSampleRate</a>;
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162 <a name="l00135"></a>00135 zc.<a class="code" href="structVamp_1_1Plugin_1_1OutputDescriptor.html#e49cc87dcb0f09b59feb85d2b78e80ef" title="Sample rate of the output results, as samples per second.">sampleRate</a> = <a class="code" href="classVamp_1_1Plugin.html#59b9dd82a4f4eb946cd0474cc81abc23">m_inputSampleRate</a>;
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163 <a name="l00136"></a>00136 list.push_back(zc);
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164 <a name="l00137"></a>00137
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165 <a name="l00138"></a>00138 <span class="keywordflow">return</span> list;
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|
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166 <a name="l00139"></a>00139 }
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167 <a name="l00140"></a>00140
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168 <a name="l00141"></a>00141 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">ZeroCrossing::FeatureSet</a>
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169 <a name="l00142"></a><a class="code" href="classZeroCrossing.html#bf4aaa6fd8cc03de63f4e1e8942633da">00142</a> <a class="code" href="classZeroCrossing.html#bf4aaa6fd8cc03de63f4e1e8942633da" 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,
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170 <a name="l00143"></a>00143 <a class="code" href="structVamp_1_1RealTime.html" title="RealTime represents time values to nanosecond precision with accurate arithmetic...">Vamp::RealTime</a> timestamp)
|
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171 <a name="l00144"></a>00144 {
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|
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172 <a name="l00145"></a>00145 <span class="keywordflow">if</span> (<a class="code" href="classZeroCrossing.html#584f100b87c78f9af9da040d79567d52">m_stepSize</a> == 0) {
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173 <a name="l00146"></a>00146 cerr << <span class="stringliteral">"ERROR: ZeroCrossing::process: "</span>
|
|
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174 <a name="l00147"></a>00147 << <span class="stringliteral">"ZeroCrossing has not been initialised"</span>
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175 <a name="l00148"></a>00148 << endl;
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176 <a name="l00149"></a>00149 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>();
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177 <a name="l00150"></a>00150 }
|
|
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178 <a name="l00151"></a>00151
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179 <a name="l00152"></a>00152 <span class="keywordtype">float</span> prev = <a class="code" href="classZeroCrossing.html#0f2d9f2cab0a8a30344e1f2c0ebb8ee8">m_previousSample</a>;
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180 <a name="l00153"></a>00153 <span class="keywordtype">size_t</span> count = 0;
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181 <a name="l00154"></a>00154
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182 <a name="l00155"></a>00155 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a> returnFeatures;
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|
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183 <a name="l00156"></a>00156
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|
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184 <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#584f100b87c78f9af9da040d79567d52">m_stepSize</a>; ++i) {
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185 <a name="l00158"></a>00158
|
|
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186 <a name="l00159"></a>00159 <span class="keywordtype">float</span> sample = inputBuffers[0][i];
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|
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187 <a name="l00160"></a>00160 <span class="keywordtype">bool</span> crossing = <span class="keyword">false</span>;
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188 <a name="l00161"></a>00161
|
|
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189 <a name="l00162"></a>00162 <span class="keywordflow">if</span> (sample <= 0.0) {
|
|
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190 <a name="l00163"></a>00163 <span class="keywordflow">if</span> (prev > 0.0) crossing = <span class="keyword">true</span>;
|
|
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191 <a name="l00164"></a>00164 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (sample > 0.0) {
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192 <a name="l00165"></a>00165 <span class="keywordflow">if</span> (prev <= 0.0) crossing = <span class="keyword">true</span>;
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193 <a name="l00166"></a>00166 }
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|
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194 <a name="l00167"></a>00167
|
|
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|
195 <a name="l00168"></a>00168 <span class="keywordflow">if</span> (crossing) {
|
|
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|
196 <a name="l00169"></a>00169 ++count;
|
|
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|
197 <a name="l00170"></a>00170 <a class="code" href="structVamp_1_1Plugin_1_1Feature.html">Feature</a> feature;
|
|
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198 <a name="l00171"></a>00171 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">true</span>;
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199 <a name="l00172"></a>00172 feature.<a class="code" href="structVamp_1_1Plugin_1_1Feature.html#aaf212bd458dc5e6f441bf7606121311" title="Timestamp of the output feature.">timestamp</a> = timestamp +
|
|
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|
200 <a name="l00173"></a>00173 <a class="code" href="structVamp_1_1RealTime.html#939b4b1d1ca190db69a418883f16ce8a" 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#59b9dd82a4f4eb946cd0474cc81abc23">m_inputSampleRate</a>);
|
|
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201 <a name="l00174"></a>00174 returnFeatures[1].push_back(feature);
|
|
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|
202 <a name="l00175"></a>00175 }
|
|
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|
203 <a name="l00176"></a>00176
|
|
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|
204 <a name="l00177"></a>00177 prev = sample;
|
|
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|
205 <a name="l00178"></a>00178 }
|
|
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|
206 <a name="l00179"></a>00179
|
|
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|
207 <a name="l00180"></a>00180 <a class="code" href="classZeroCrossing.html#0f2d9f2cab0a8a30344e1f2c0ebb8ee8">m_previousSample</a> = prev;
|
|
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|
208 <a name="l00181"></a>00181
|
|
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|
209 <a name="l00182"></a>00182 <a class="code" href="structVamp_1_1Plugin_1_1Feature.html">Feature</a> feature;
|
|
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|
210 <a name="l00183"></a>00183 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>;
|
|
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|
211 <a name="l00184"></a>00184 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(<span class="keywordtype">float</span>(count));
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|
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212 <a name="l00185"></a>00185
|
|
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|
213 <a name="l00186"></a>00186 returnFeatures[0].push_back(feature);
|
|
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|
214 <a name="l00187"></a>00187 <span class="keywordflow">return</span> returnFeatures;
|
|
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|
215 <a name="l00188"></a>00188 }
|
|
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|
216 <a name="l00189"></a>00189
|
|
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|
217 <a name="l00190"></a>00190 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">ZeroCrossing::FeatureSet</a>
|
|
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|
218 <a name="l00191"></a><a class="code" href="classZeroCrossing.html#70996d1b7166e303903daf92a9a37ad8">00191</a> <a class="code" href="classZeroCrossing.html#70996d1b7166e303903daf92a9a37ad8" title="After all blocks have been processed, calculate and return any remaining features...">ZeroCrossing::getRemainingFeatures</a>()
|
|
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|
219 <a name="l00192"></a>00192 {
|
|
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|
220 <a name="l00193"></a>00193 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a>();
|
|
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|
221 <a name="l00194"></a>00194 }
|
|
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|
222 <a name="l00195"></a>00195
|
|
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|
223 </pre></div></div>
|
|
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|
224 <hr size="1"><address style="text-align: right;"><small>Generated on Thu Sep 24 13:40:13 2009 for VampPluginSDK by
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|
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|
225 <a href="http://www.doxygen.org/index.html">
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cannam@35
|
226 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.8 </small></address>
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227 </body>
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228 </html>
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