1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>v4l2_detect_cvt</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-print-dv-timings.html" title="v4l2_print_dv_timings"><link rel="next" href="API-v4l2-detect-gtf.html" title="v4l2_detect_gtf"></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_detect_cvt</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-v4l2-print-dv-timings.html">Prev</a> </td><th width="60%" align="center">Video2Linux devices</th><td width="20%" align="right"> <a accesskey="n" href="API-v4l2-detect-gtf.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-v4l2-detect-cvt"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>v4l2_detect_cvt — 
2     detect if the given timings follow the CVT standard
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_detect_cvt </b>(</code></td><td>unsigned <var class="pdparam">frame_height</var>, </td></tr><tr><td> </td><td>unsigned <var class="pdparam">hfreq</var>, </td></tr><tr><td> </td><td>unsigned <var class="pdparam">vsync</var>, </td></tr><tr><td> </td><td>unsigned <var class="pdparam">active_width</var>, </td></tr><tr><td> </td><td>u32 <var class="pdparam">polarities</var>, </td></tr><tr><td> </td><td>bool <var class="pdparam">interlaced</var>, </td></tr><tr><td> </td><td>struct v4l2_dv_timings * <var class="pdparam">fmt</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="id-1.8.2.55.5"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>frame_height</code></em></span></dt><dd><p>
4     the total height of the frame (including blanking) in lines.
5    </p></dd><dt><span class="term"><em class="parameter"><code>hfreq</code></em></span></dt><dd><p>
6     the horizontal frequency in Hz.
7    </p></dd><dt><span class="term"><em class="parameter"><code>vsync</code></em></span></dt><dd><p>
8     the height of the vertical sync in lines.
9    </p></dd><dt><span class="term"><em class="parameter"><code>active_width</code></em></span></dt><dd><p>
10     active width of image (does not include blanking). This
11     information is needed only in case of version 2 of reduced blanking.
12     In other cases, this parameter does not have any effect on timings.
13    </p></dd><dt><span class="term"><em class="parameter"><code>polarities</code></em></span></dt><dd><p>
14     the horizontal and vertical polarities (same as struct
15     v4l2_bt_timings polarities).
16    </p></dd><dt><span class="term"><em class="parameter"><code>interlaced</code></em></span></dt><dd><p>
17     if this flag is true, it indicates interlaced format
18    </p></dd><dt><span class="term"><em class="parameter"><code>fmt</code></em></span></dt><dd><p>
19     the resulting timings.
20    </p></dd></dl></div></div><div class="refsect1"><a name="id-1.8.2.55.6"></a><h2>Description</h2><p>
21   This function will attempt to detect if the given values correspond to a
22   valid CVT format. If so, then it will return true, and fmt will be filled
23   in with the found CVT timings.
24</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-print-dv-timings.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-detect-gtf.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">v4l2_print_dv_timings</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_detect_gtf</span></td></tr></table></div></body></html>
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