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6. pixfmt-uyvy.xml

    <refentry id="V4L2-PIX-FMT-UYVY">
      <refmeta>
	<refentrytitle>V4L2_PIX_FMT_UYVY ('UYVY')</refentrytitle>
	&manvol;
      </refmeta>
      <refnamediv>
	<refname><constant>V4L2_PIX_FMT_UYVY</constant></refname>
	<refpurpose>Variation of
<constant>V4L2_PIX_FMT_YUYV</constant> with different order of samples
in memory</refpurpose>
      </refnamediv>
      <refsect1>
	<title>Description</title>

	<para>In this format each four bytes is two pixels. Each four
bytes is two Y's, a Cb and a Cr. Each Y goes to one of the pixels, and
the Cb and Cr belong to both pixels. As you can see, the Cr and Cb
components have half the horizontal resolution of the Y
component.</para>

	<example>
	  <title><constant>V4L2_PIX_FMT_UYVY</constant> 4 &times; 4
pixel image</title>

	  <formalpara>
	    <title>Byte Order.</title>
	    <para>Each cell is one byte.
		<informaltable frame="none">
		<tgroup cols="9" align="center">
		  <colspec align="left" colwidth="2*" />
		  <tbody valign="top">
		    <row>
		      <entry>start&nbsp;+&nbsp;0:</entry>
		      <entry>Cb<subscript>00</subscript></entry>
		      <entry>Y'<subscript>00</subscript></entry>
		      <entry>Cr<subscript>00</subscript></entry>
		      <entry>Y'<subscript>01</subscript></entry>
		      <entry>Cb<subscript>01</subscript></entry>
		      <entry>Y'<subscript>02</subscript></entry>
		      <entry>Cr<subscript>01</subscript></entry>
		      <entry>Y'<subscript>03</subscript></entry>
		    </row>
		    <row>
		      <entry>start&nbsp;+&nbsp;8:</entry>
		      <entry>Cb<subscript>10</subscript></entry>
		      <entry>Y'<subscript>10</subscript></entry>
		      <entry>Cr<subscript>10</subscript></entry>
		      <entry>Y'<subscript>11</subscript></entry>
		      <entry>Cb<subscript>11</subscript></entry>
		      <entry>Y'<subscript>12</subscript></entry>
		      <entry>Cr<subscript>11</subscript></entry>
		      <entry>Y'<subscript>13</subscript></entry>
		    </row>
		    <row>
		      <entry>start&nbsp;+&nbsp;16:</entry>
		      <entry>Cb<subscript>20</subscript></entry>
		      <entry>Y'<subscript>20</subscript></entry>
		      <entry>Cr<subscript>20</subscript></entry>
		      <entry>Y'<subscript>21</subscript></entry>
		      <entry>Cb<subscript>21</subscript></entry>
		      <entry>Y'<subscript>22</subscript></entry>
		      <entry>Cr<subscript>21</subscript></entry>
		      <entry>Y'<subscript>23</subscript></entry>
		    </row>
		    <row>
		      <entry>start&nbsp;+&nbsp;24:</entry>
		      <entry>Cb<subscript>30</subscript></entry>
		      <entry>Y'<subscript>30</subscript></entry>
		      <entry>Cr<subscript>30</subscript></entry>
		      <entry>Y'<subscript>31</subscript></entry>
		      <entry>Cb<subscript>31</subscript></entry>
		      <entry>Y'<subscript>32</subscript></entry>
		      <entry>Cr<subscript>31</subscript></entry>
		      <entry>Y'<subscript>33</subscript></entry>
		    </row>
		  </tbody>
		</tgroup>
		</informaltable>
	      </para>
	  </formalpara>

	  <formalpara>
	    <title>Color Sample Location.</title>
	    <para>
		<informaltable frame="none">
		<tgroup cols="7" align="center">
		  <tbody valign="top">
		    <row>
		      <entry></entry>
		      <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
		      <entry>2</entry><entry></entry><entry>3</entry>
		    </row>
		    <row>
		      <entry>0</entry>
		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
		      <entry>Y</entry><entry>C</entry><entry>Y</entry>
		    </row>
		    <row>
		      <entry>1</entry>
		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
		      <entry>Y</entry><entry>C</entry><entry>Y</entry>
		    </row>
		    <row>
		      <entry>2</entry>
		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
		      <entry>Y</entry><entry>C</entry><entry>Y</entry>
		    </row>
		    <row>
		      <entry>3</entry>
		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
		      <entry>Y</entry><entry>C</entry><entry>Y</entry>
		    </row>
		  </tbody>
		</tgroup>
		</informaltable>
	      </para>
	  </formalpara>
	</example>
      </refsect1>
    </refentry>