<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>Effect Devices Interface</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="LINUX MEDIA INFRASTRUCTURE API" /><link rel="up" href="ch04.html" title="Chapter 4. Interfaces" /><link rel="prev" href="ch04s05.html" title="Codec Interface" /><link rel="next" href="ch04s07.html" title="Raw VBI Data Interface" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Effect Devices Interface</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch04s05.html">Prev</a> </td><th width="60%" align="center">Chapter 4. Interfaces</th><td width="20%" align="right"> <a accesskey="n" href="ch04s07.html">Next</a></td></tr></table><hr /></div><div class="section" title="Effect Devices Interface"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="effect"></a>Effect Devices Interface</h2></div></div></div><div class="note" title="Suspended" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Suspended</h3><p>This interface has been be suspended from the V4L2 API implemented in Linux 2.6 until we have more experience with effect device interfaces.</p></div><p>A V4L2 video effect device can do image effects, filtering, or combine two or more images or image streams. For example video transitions or wipes. Applications send data to be processed and receive the result data either with <a class="link" href="re66.html" title="V4L2 read()"><code class="function">read()</code></a> and <a class="link" href="re68.html" title="V4L2 write()"><code class="function">write()</code></a> functions, or through the streaming I/O mechanism.</p><p>[to do]</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch04s05.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch04.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch04s07.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Codec Interface </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Raw VBI Data Interface</td></tr></table></div></body></html>
