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<h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstfft.top_of_page"></a>gstfft</span></h2>
<p>gstfft — General FFT functions and declarations</p>
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<a name="gst-plugins-base-libs-gstfft.functions"></a><h2>Functions</h2>
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<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
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<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>
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<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstfft.html#gst-fft-next-fast-length" title="gst_fft_next_fast_length ()">gst_fft_next_fast_length</a> <span class="c_punctuation">()</span>
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<a name="gst-plugins-base-libs-gstfft.other"></a><h2>Types and Values</h2>
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<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-gstfft.html#GstFFTWindow" title="enum GstFFTWindow">GstFFTWindow</a></td>
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<a name="gst-plugins-base-libs-gstfft.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <gst/fft/gstfft.h>
</pre>
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<a name="gst-plugins-base-libs-gstfft.description"></a><h2>Description</h2>
<p>This library includes general definitions and functions, useful for
all typed FFT classes.</p>
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<div class="refsect1">
<a name="gst-plugins-base-libs-gstfft.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gst-fft-next-fast-length"></a><h3>gst_fft_next_fast_length ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>
gst_fft_next_fast_length (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> n</code></em>);</pre>
<p>Returns the next number to <em class="parameter"><code>n</code></em>
that is entirely a product
of 2, 3 and 5. Using this as the <em class="parameter"><code>len</code></em>
parameter for
the different GstFFT types will provide the best performance.</p>
<div class="refsect3">
<a name="id-1.2.7.4.7.2.5"></a><h4>Parameters</h4>
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<col width="150px" class="parameters_name">
<col class="parameters_description">
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<td class="parameter_name"><p>n</p></td>
<td class="parameter_description"><p>Number for which the next fast length should be returned</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.7.4.7.2.6"></a><h4>Returns</h4>
<p> the next fast FFT length.</p>
<p></p>
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</div>
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<div class="refsect1">
<a name="gst-plugins-base-libs-gstfft.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstFFTWindow"></a><h3>enum GstFFTWindow</h3>
<p>The various window functions available.</p>
<div class="refsect3">
<a name="id-1.2.7.4.8.2.4"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
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<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-FFT-WINDOW-RECTANGULAR:CAPS"></a>GST_FFT_WINDOW_RECTANGULAR</p></td>
<td class="enum_member_description">
<p>Rectangular window</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FFT-WINDOW-HAMMING:CAPS"></a>GST_FFT_WINDOW_HAMMING</p></td>
<td class="enum_member_description">
<p>Hamming window</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FFT-WINDOW-HANN:CAPS"></a>GST_FFT_WINDOW_HANN</p></td>
<td class="enum_member_description">
<p>Hann (sometimes also called Hanning) window</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FFT-WINDOW-BARTLETT:CAPS"></a>GST_FFT_WINDOW_BARTLETT</p></td>
<td class="enum_member_description">
<p>Bartlett window</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FFT-WINDOW-BLACKMAN:CAPS"></a>GST_FFT_WINDOW_BLACKMAN</p></td>
<td class="enum_member_description">
<p>Blackman window</p>
</td>
<td class="enum_member_annotations"> </td>
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