Sophie: kernel-doc-3.11.10-100.fc18 noarch

kernel-doc-3.11.10-100.fc18.noarch.rpm

<?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>Digital Video (DV) Timings</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><link rel="home" href="index.html" title="LINUX MEDIA INFRASTRUCTURE API" /><link rel="up" href="common.html" title="Chapter&#160;1.&#160;Common API Elements" /><link rel="prev" href="standard.html" title="Video Standards" /><link rel="next" href="control.html" title="User Controls" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Digital Video (DV) Timings</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="standard.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;1.&#160;Common API Elements</th><td width="20%" align="right">&#160;<a accesskey="n" href="control.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="dv-timings"></a>Digital Video (DV) Timings</h2></div></div></div><p>
	The video standards discussed so far have been dealing with Analog TV and the
corresponding video timings. Today there are many more different hardware interfaces
such as High Definition TV interfaces (HDMI), VGA, DVI connectors etc., that carry
video signals and there is a need to extend the API to select the video timings
for these interfaces. Since it is not possible to extend the <a class="link" href="vidioc-enumstd.html#v4l2-std-id" title="Table&#160;A.44.&#160;typedef v4l2_std_id">v4l2_std_id</a> due to
the limited bits available, a new set of IOCTLs was added to set/get video timings at
the input and output: </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>DV Timings: This will allow applications to define detailed
video timings for the interface. This includes parameters such as width, height,
polarities, frontporch, backporch etc. The <code class="filename">linux/v4l2-dv-timings.h</code>
header can be used to get the timings of the formats in the <a class="xref" href="bi01.html#cea861" title="A DTV Profile for Uncompressed High Speed Digital Interfaces">[<abbr class="abbrev">CEA-861-E</abbr>]</a> and
<a class="xref" href="bi01.html#vesadmt" title="VESA and Industry Standards and Guidelines for Computer Display Monitor Timing (DMT)">[<abbr class="abbrev">VESA&#160;DMT</abbr>]</a> standards.
	</p></li></ul></div><p>To enumerate and query the attributes of the DV timings supported by a device,
	applications use the <a class="link" href="vidioc-enum-dv-timings.html" title="ioctl VIDIOC_ENUM_DV_TIMINGS"><code class="constant">VIDIOC_ENUM_DV_TIMINGS</code></a> and <a class="link" href="vidioc-dv-timings-cap.html" title="ioctl VIDIOC_DV_TIMINGS_CAP"><code class="constant">VIDIOC_DV_TIMINGS_CAP</code></a> ioctls.
	To set DV timings for the device, applications use the
<a class="link" href="vidioc-g-dv-timings.html" title="ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS"><code class="constant">VIDIOC_S_DV_TIMINGS</code></a> ioctl and to get current DV timings they use the
<a class="link" href="vidioc-g-dv-timings.html" title="ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS"><code class="constant">VIDIOC_G_DV_TIMINGS</code></a> ioctl. To detect the DV timings as seen by the video receiver applications
use the <a class="link" href="vidioc-query-dv-timings.html" title="ioctl VIDIOC_QUERY_DV_TIMINGS"><code class="constant">VIDIOC_QUERY_DV_TIMINGS</code></a> ioctl.</p><p>Applications can make use of the <a class="xref" href="vidioc-enuminput.html#input-capabilities" title="Table&#160;A.38.&#160;Input capabilities">Table&#160;A.38, &#8220;Input capabilities&#8221;</a> and
<a class="xref" href="vidioc-enumoutput.html#output-capabilities" title="Table&#160;A.41.&#160;Output capabilities">Table&#160;A.41, &#8220;Output capabilities&#8221;</a> flags to decide what ioctls are available to set the
video timings for the device.</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="standard.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="common.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="control.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Video Standards&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;User Controls</td></tr></table></div></body></html>