1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>v4l2_ctrl_radio_filter</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Device Drivers"><link rel="up" href="mediadev.html#id-1.8.2" title="Video2Linux devices"><link rel="prev" href="API-v4l2-ctrl-add-handler.html" title="v4l2_ctrl_add_handler"><link rel="next" href="API-v4l2-ctrl-cluster.html" title="v4l2_ctrl_cluster"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">v4l2_ctrl_radio_filter</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-v4l2-ctrl-add-handler.html">Prev</a> </td><th width="60%" align="center">Video2Linux devices</th><td width="20%" align="right"> <a accesskey="n" href="API-v4l2-ctrl-cluster.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-v4l2-ctrl-radio-filter"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>v4l2_ctrl_radio_filter — 
2     Standard filter for radio controls.
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">bool <b class="fsfunc">v4l2_ctrl_radio_filter </b>(</code></td><td><a class="link" href="API-struct-v4l2-ctrl.html" title="struct v4l2_ctrl">const struct v4l2_ctrl</a> * <var class="pdparam">ctrl</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="id-1.8.2.33.5"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>ctrl</code></em></span></dt><dd><p>
4     The control that is filtered.
5    </p></dd></dl></div></div><div class="refsect1"><a name="id-1.8.2.33.6"></a><h2>Description</h2><p>
6   This will return true for any controls that are valid for radio device
7   nodes. Those are all of the V4L2_CID_AUDIO_* user controls and all FM
8   transmitter class controls.
9   </p><p>
10
11   This function is to be used with <code class="function"><a class="link" href="API-v4l2-ctrl-add-handler.html" title="v4l2_ctrl_add_handler">v4l2_ctrl_add_handler</a></code>.
12</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-v4l2-ctrl-add-handler.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="mediadev.html#id-1.8.2">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-v4l2-ctrl-cluster.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">v4l2_ctrl_add_handler</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="phrase">v4l2_ctrl_cluster</span></td></tr></table></div></body></html>
13