1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>v4l2_ctrl_new_std</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-new-custom.html" title="v4l2_ctrl_new_custom"><link rel="next" href="API-v4l2-ctrl-new-std-menu.html" title="v4l2_ctrl_new_std_menu"></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_new_std</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-v4l2-ctrl-new-custom.html">Prev</a> </td><th width="60%" align="center">Video2Linux devices</th><td width="20%" align="right"> <a accesskey="n" href="API-v4l2-ctrl-new-std-menu.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-v4l2-ctrl-new-std"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>v4l2_ctrl_new_std — 2 Allocate and initialize a new standard V4L2 non-menu control. 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"><a class="link" href="API-struct-v4l2-ctrl.html" title="struct v4l2_ctrl">struct v4l2_ctrl</a> * <b class="fsfunc">v4l2_ctrl_new_std </b>(</code></td><td><a class="link" href="API-struct-v4l2-ctrl-handler.html" title="struct v4l2_ctrl_handler">struct v4l2_ctrl_handler</a> * <var class="pdparam">hdl</var>, </td></tr><tr><td> </td><td><a class="link" href="API-struct-v4l2-ctrl-ops.html" title="struct v4l2_ctrl_ops">const struct v4l2_ctrl_ops</a> * <var class="pdparam">ops</var>, </td></tr><tr><td> </td><td>u32 <var class="pdparam">id</var>, </td></tr><tr><td> </td><td>s64 <var class="pdparam">min</var>, </td></tr><tr><td> </td><td>s64 <var class="pdparam">max</var>, </td></tr><tr><td> </td><td>u64 <var class="pdparam">step</var>, </td></tr><tr><td> </td><td>s64 <var class="pdparam">def</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="id-1.8.2.27.5"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>hdl</code></em></span></dt><dd><p> 4 The control handler. 5 </p></dd><dt><span class="term"><em class="parameter"><code>ops</code></em></span></dt><dd><p> 6 The control ops. 7 </p></dd><dt><span class="term"><em class="parameter"><code>id</code></em></span></dt><dd><p> 8 The control ID. 9 </p></dd><dt><span class="term"><em class="parameter"><code>min</code></em></span></dt><dd><p> 10 The control's minimum value. 11 </p></dd><dt><span class="term"><em class="parameter"><code>max</code></em></span></dt><dd><p> 12 The control's maximum value. 13 </p></dd><dt><span class="term"><em class="parameter"><code>step</code></em></span></dt><dd><p> 14 The control's step value 15 </p></dd><dt><span class="term"><em class="parameter"><code>def</code></em></span></dt><dd><p> 16 The control's default value. 17 </p></dd></dl></div></div><div class="refsect1"><a name="id-1.8.2.27.6"></a><h2>Description</h2><p> 18 If the <span class="structname"><a class="link" href="API-struct-v4l2-ctrl.html" title="struct v4l2_ctrl">v4l2_ctrl</a></span> struct could not be allocated, or the control 19 ID is not known, then NULL is returned and <em class="parameter"><code>hdl</code></em>->error is set to the 20 appropriate error code (if it wasn't set already). 21 </p><p> 22 23 If <em class="parameter"><code>id</code></em> refers to a menu control, then this function will return NULL. 24 </p><p> 25 26 Use <code class="function"><a class="link" href="API-v4l2-ctrl-new-std-menu.html" title="v4l2_ctrl_new_std_menu">v4l2_ctrl_new_std_menu</a></code> when adding menu controls. 27</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-new-custom.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-new-std-menu.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">v4l2_ctrl_new_custom</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_new_std_menu</span></td></tr></table></div></body></html> 28