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<a name="gst-plugins-good-plugins-audiowsincband"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-good-plugins-audiowsincband.top_of_page"></a>audiowsincband</span></h2>
<p>audiowsincband — Band pass and band reject windowed sinc filter</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-audiowsincband.properties"></a><h2>Properties</h2>
<div class="informaltable"><table border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-good-plugins-audiowsincband.html#GstAudioWSincBand--lower-frequency" title="The “lower-frequency” property">lower-frequency</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-good-plugins-audiowsincband.html#GstAudioWSincBand--upper-frequency" title="The “upper-frequency” property">upper-frequency</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">GstAudioWSincBandMode</span></td>
<td class="property_name"><a class="link" href="gst-plugins-good-plugins-audiowsincband.html#GstAudioWSincBand--mode" title="The “mode” property">mode</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">GstAudioWSincBandWindow</span></td>
<td class="property_name"><a class="link" href="gst-plugins-good-plugins-audiowsincband.html#GstAudioWSincBand--window" title="The “window” property">window</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-good-plugins-audiowsincband.html#GstAudioWSincBand--length" title="The “length” property">length</a></td>
<td class="property_flags">Read / Write</td>
</tr>
</tbody>
</table></div>
</div>
<a name="GstAudioWSincBand"></a><div class="refsect1">
<a name="gst-plugins-good-plugins-audiowsincband.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="gst-plugins-good-plugins-audiowsincband.html#GstAudioWSincBand-struct" title="struct GstAudioWSincBand">GstAudioWSincBand</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-audiowsincband.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
<span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
<span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html">GstObject</a>
<span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html">GstElement</a>
<span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstBaseTransform.html">GstBaseTransform</a>
<span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0/gst-plugins-base-libs-gstaudiofilter.html#GstAudioFilter">GstAudioFilter</a>
<span class="lineart">╰──</span> GstAudioFXBaseFIRFilter
<span class="lineart">╰──</span> GstAudioWSincBand
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-audiowsincband.description"></a><h2>Description</h2>
<p>Attenuates all frequencies outside (bandpass) or inside (bandreject) of a frequency
band. The length parameter controls the rolloff, the window parameter
controls rolloff and stopband attenuation. The Hamming window provides a faster rolloff but a bit
worse stopband attenuation, the other way around for the Blackman window.</p>
<p>This element has the advantage over the Chebyshev bandpass and bandreject filter that it has
a much better rolloff when using a larger kernel size and almost linear phase. The only
disadvantage is the much slower execution time with larger kernels.</p>
<div class="refsect2">
<a name="id-1.2.20.7.4"></a><h3>Example launch line</h3>
<div class="informalexample"><pre class="programlisting">
gst-launch-1.0 audiotestsrc freq=1500 ! audioconvert ! audiosincband mode=band-pass lower-frequency=3000 upper-frequency=10000 length=501 window=blackman ! audioconvert ! alsasink
gst-launch-1.0 filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audiowsincband mode=band-reject lower-frequency=59 upper-frequency=61 length=10001 window=hamming ! audioconvert ! alsasink
gst-launch-1.0 audiotestsrc wave=white-noise ! audioconvert ! audiowsincband mode=band-pass lower-frequency=1000 upper-frequency=2000 length=31 ! audioconvert ! alsasink
</pre></div>
</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="id-1.2.20.7.5.1"></a><h3>Element Information</h3>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">plugin</span></p></td>
<td>
<a class="link" href="gst-plugins-good-plugins-plugin-audiofx.html#plugin-audiofx">audiofx</a>
</td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Thomas Vander Stichele <thomas at apestaart dot org>, Steven W. Smith, Dreamlab Technologies Ltd. <mathis.hofer@dreamlab.net>, Sebastian Dröge <sebastian.droege@collabora.co.uk></td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Filter/Effect/Audio</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.20.7.5.2"></a><h3>Element Pads</h3>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">name</span></p></td>
<td>sink</td>
</tr>
<tr>
<td><p><span class="term">direction</span></p></td>
<td>sink</td>
</tr>
<tr>
<td><p><span class="term">presence</span></p></td>
<td>always</td>
</tr>
<tr>
<td><p><span class="term">details</span></p></td>
<td>audio/x-raw, format=(string){ F32LE, F64LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved</td>
</tr>
</tbody>
</table></div>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">name</span></p></td>
<td>src</td>
</tr>
<tr>
<td><p><span class="term">direction</span></p></td>
<td>source</td>
</tr>
<tr>
<td><p><span class="term">presence</span></p></td>
<td>always</td>
</tr>
<tr>
<td><p><span class="term">details</span></p></td>
<td>audio/x-raw, format=(string){ F32LE, F64LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-audiowsincband.functions_details"></a><h2>Functions</h2>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-audiowsincband.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstAudioWSincBand-struct"></a><h3>struct GstAudioWSincBand</h3>
<pre class="programlisting">struct GstAudioWSincBand;</pre>
<p>Opaque data structure.</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-audiowsincband.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstAudioWSincBand--lower-frequency"></a><h3>The <code class="literal">“lower-frequency”</code> property</h3>
<pre class="programlisting"> “lower-frequency” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a></pre>
<p>Cut-off lower frequency (Hz).</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [0,100000]</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioWSincBand--upper-frequency"></a><h3>The <code class="literal">“upper-frequency”</code> property</h3>
<pre class="programlisting"> “upper-frequency” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a></pre>
<p>Cut-off upper frequency (Hz).</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [0,100000]</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioWSincBand--mode"></a><h3>The <code class="literal">“mode”</code> property</h3>
<pre class="programlisting"> “mode” <span class="type">GstAudioWSincBandMode</span></pre>
<p>Band pass or band reject mode.</p>
<p>Flags: Read / Write</p>
<p>Default value: Band pass (default)</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioWSincBand--window"></a><h3>The <code class="literal">“window”</code> property</h3>
<pre class="programlisting"> “window” <span class="type">GstAudioWSincBandWindow</span></pre>
<p>Window function to use.</p>
<p>Flags: Read / Write</p>
<p>Default value: Hamming window (default)</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioWSincBand--length"></a><h3>The <code class="literal">“length”</code> property</h3>
<pre class="programlisting"> “length” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a></pre>
<p>Filter kernel length, will be rounded to the next odd number.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [3,256000]</p>
<p>Default value: 101</p>
</div>
</div>
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