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[media] DocBook: V4L: add V4L2_SDR_FMT_CU16LE - 'CU16' 

Document V4L2_SDR_FMT_CU16LE format.
It is complex unsigned 16-bit little endian IQ sample. Used by
software defined radio devices.

Cc: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Antti Palosaari 2014-01-31 00:29:46 -03:00 committed by Mauro Carvalho Chehab
parent 0a670c42f2
commit e6001abcc5
2 changed files with 47 additions and 0 deletions
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46
Documentation/DocBook/media/v4l/pixfmt-sdr-cu16le.xml Normal file
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@ -0,0 +1,46 @@
<refentry id="V4L2-SDR-FMT-CU16LE">
<refmeta>
<refentrytitle>V4L2_SDR_FMT_CU16LE ('CU16')</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>
<constant>V4L2_SDR_FMT_CU16LE</constant>
</refname>
<refpurpose>Complex unsigned 16-bit little endian IQ sample</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
This format contains sequence of complex number samples. Each complex number
consist two parts, called In-phase and Quadrature (IQ). Both I and Q are
represented as a 16 bit unsigned little endian number. I value comes first
and Q value after that.
</para>
<example>
<title><constant>V4L2_SDR_FMT_CU16LE</constant> 1 sample</title>
<formalpara>
<title>Byte Order.</title>
<para>Each cell is one byte.
<informaltable frame="none">
<tgroup cols="3" align="center">
<colspec align="left" colwidth="2*" />
<tbody valign="top">
<row>
<entry>start&nbsp;+&nbsp;0:</entry>
<entry>I'<subscript>0[7:0]</subscript></entry>
<entry>I'<subscript>0[15:8]</subscript></entry>
</row>
<row>
<entry>start&nbsp;+&nbsp;2:</entry>
<entry>Q'<subscript>0[7:0]</subscript></entry>
<entry>Q'<subscript>0[15:8]</subscript></entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</formalpara>
</example>
</refsect1>
</refentry>

1
Documentation/DocBook/media/v4l/pixfmt.xml
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@ -818,6 +818,7 @@ extended control <constant>V4L2_CID_MPEG_STREAM_TYPE</constant>, see
interface only.</para>
&sub-sdr-cu08;
&sub-sdr-cu16le;
</section>