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Added tag vamp-plugin-sdk-v2.7 for changeset 27319718b1f8
author Chris Cannam
date Fri, 24 Feb 2017 16:45:00 +0000
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<p>A simple <a class="el" href="classVamp_1_1FFT.html" title="A simple FFT implementation provided for convenience of plugin authors. ">FFT</a> implementation provided for convenience of plugin authors.  
 <a href="classVamp_1_1FFTComplex.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="FFT_8h_source.html">FFT.h</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:ab73b793c7d1bf5ed175ff4aa0cec5190"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classVamp_1_1FFTComplex.html#ab73b793c7d1bf5ed175ff4aa0cec5190">FFTComplex</a> (unsigned int n)</td></tr>
<tr class="memdesc:ab73b793c7d1bf5ed175ff4aa0cec5190"><td class="mdescLeft">&#160;</td><td class="mdescRight">Prepare to calculate transforms of size n.  <a href="#ab73b793c7d1bf5ed175ff4aa0cec5190">More...</a><br /></td></tr>
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<tr class="memitem:a5b108c655e5c73ee3ba6881ddd7c40a6"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classVamp_1_1FFTComplex.html#a5b108c655e5c73ee3ba6881ddd7c40a6">~FFTComplex</a> ()</td></tr>
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<tr class="memitem:ab09f93ce626fe41513f33dd9ab54518d"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classVamp_1_1FFTComplex.html#ab09f93ce626fe41513f33dd9ab54518d">forward</a> (const double *ci, double *co)</td></tr>
<tr class="memdesc:ab09f93ce626fe41513f33dd9ab54518d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculate a forward transform of size n.  <a href="#ab09f93ce626fe41513f33dd9ab54518d">More...</a><br /></td></tr>
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<tr class="memitem:aa392c6a7dbcc2cc6a1edeac6da4c435b"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classVamp_1_1FFTComplex.html#aa392c6a7dbcc2cc6a1edeac6da4c435b">inverse</a> (const double *ci, double *co)</td></tr>
<tr class="memdesc:aa392c6a7dbcc2cc6a1edeac6da4c435b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculate an inverse transform of size n.  <a href="#aa392c6a7dbcc2cc6a1edeac6da4c435b">More...</a><br /></td></tr>
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Private Attributes</h2></td></tr>
<tr class="memitem:aa521eef4194d91d2c48d07ed5f6d7f5f"><td class="memItemLeft" align="right" valign="top">D *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classVamp_1_1FFTComplex.html#aa521eef4194d91d2c48d07ed5f6d7f5f">m_d</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>A simple <a class="el" href="classVamp_1_1FFT.html" title="A simple FFT implementation provided for convenience of plugin authors. ">FFT</a> implementation provided for convenience of plugin authors. </p>
<p>This class provides double-precision complex-complex transforms.</p>
<p>Note: If the SDK has been compiled with the SINGLE_PRECISION_FFT flag, then all FFTs will use single precision internally. The default is double precision. The API uses doubles in either case.</p>
<p>The forward transform is unscaled; the inverse transform is scaled by 1/n. </p>

<p class="definition">Definition at line <a class="el" href="FFT_8h_source.html#l00109">109</a> of file <a class="el" href="FFT_8h_source.html">FFT.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ab73b793c7d1bf5ed175ff4aa0cec5190">&#9670;&nbsp;</a></span>FFTComplex()</h2>

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          <td class="memname">Vamp::FFTComplex::FFTComplex </td>
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          <td class="paramname"><em>n</em></td><td>)</td>
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<p>Prepare to calculate transforms of size n. </p>
<p>n must be a multiple of 2. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a5b108c655e5c73ee3ba6881ddd7c40a6">&#9670;&nbsp;</a></span>~FFTComplex()</h2>

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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ab09f93ce626fe41513f33dd9ab54518d">&#9670;&nbsp;</a></span>forward()</h2>

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          <td class="memname">void Vamp::FFTComplex::forward </td>
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          <td class="paramname"><em>ci</em>, </td>
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          <td class="paramtype">double *&#160;</td>
          <td class="paramname"><em>co</em>&#160;</td>
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<p>Calculate a forward transform of size n. </p>
<p>ci must point to the interleaved complex input data of size n (that is, 2n doubles in total).</p>
<p>co must point to enough space to receive an interleaved complex output array of size n (that is, 2n doubles in total). </p>

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<h2 class="memtitle"><span class="permalink"><a href="#aa392c6a7dbcc2cc6a1edeac6da4c435b">&#9670;&nbsp;</a></span>inverse()</h2>

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          <td class="memname">void Vamp::FFTComplex::inverse </td>
          <td>(</td>
          <td class="paramtype">const double *&#160;</td>
          <td class="paramname"><em>ci</em>, </td>
        </tr>
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          <td class="paramtype">double *&#160;</td>
          <td class="paramname"><em>co</em>&#160;</td>
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<p>Calculate an inverse transform of size n. </p>
<p>ci must point to an interleaved complex input array of size n (that is, 2n doubles in total).</p>
<p>co must point to enough space to receive the interleaved complex output data of size n (that is, 2n doubles in total). The output is scaled by 1/n. </p>

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<h2 class="groupheader">Member Data Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#aa521eef4194d91d2c48d07ed5f6d7f5f">&#9670;&nbsp;</a></span>m_d</h2>

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<span class="mlabels"><span class="mlabel">private</span></span>  </td>
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<p class="definition">Definition at line <a class="el" href="FFT_8h_source.html#l00144">144</a> of file <a class="el" href="FFT_8h_source.html">FFT.h</a>.</p>

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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="FFT_8h_source.html">FFT.h</a></li>
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