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Based on kernel version 3.16. Page generated on 2014-08-06 21:38 EST.

1	    <refentry id="V4L2-PIX-FMT-YUYV">
2	      <refmeta>
3		<refentrytitle>V4L2_PIX_FMT_YUYV ('YUYV')</refentrytitle>
4		&manvol;
5	      </refmeta>
6	      <refnamediv>
7		<refname><constant>V4L2_PIX_FMT_YUYV</constant></refname>
8		<refpurpose>Packed format with &frac12; horizontal chroma
9	resolution, also known as YUV 4:2:2</refpurpose>
10	      </refnamediv>
11	      <refsect1>
12		<title>Description</title>
13	
14		<para>In this format each four bytes is two pixels. Each four
15	bytes is two Y's, a Cb and a Cr. Each Y goes to one of the pixels, and
16	the Cb and Cr belong to both pixels. As you can see, the Cr and Cb
17	components have half the horizontal resolution of the Y component.
18	<constant>V4L2_PIX_FMT_YUYV </constant> is known in the Windows
19	environment as YUY2.</para>
20	
21		<example>
22		  <title><constant>V4L2_PIX_FMT_YUYV</constant> 4 &times; 4
23	pixel image</title>
24	
25		  <formalpara>
26		    <title>Byte Order.</title>
27		    <para>Each cell is one byte.
28			<informaltable frame="none">
29			<tgroup cols="9" align="center">
30			  <colspec align="left" colwidth="2*" />
31			  <tbody valign="top">
32			    <row>
33			      <entry>start&nbsp;+&nbsp;0:</entry>
34			      <entry>Y'<subscript>00</subscript></entry>
35			      <entry>Cb<subscript>00</subscript></entry>
36			      <entry>Y'<subscript>01</subscript></entry>
37			      <entry>Cr<subscript>00</subscript></entry>
38			      <entry>Y'<subscript>02</subscript></entry>
39			      <entry>Cb<subscript>01</subscript></entry>
40			      <entry>Y'<subscript>03</subscript></entry>
41			      <entry>Cr<subscript>01</subscript></entry>
42			    </row>
43			    <row>
44			      <entry>start&nbsp;+&nbsp;8:</entry>
45			      <entry>Y'<subscript>10</subscript></entry>
46			      <entry>Cb<subscript>10</subscript></entry>
47			      <entry>Y'<subscript>11</subscript></entry>
48			      <entry>Cr<subscript>10</subscript></entry>
49			      <entry>Y'<subscript>12</subscript></entry>
50			      <entry>Cb<subscript>11</subscript></entry>
51			      <entry>Y'<subscript>13</subscript></entry>
52			      <entry>Cr<subscript>11</subscript></entry>
53			    </row>
54			    <row>
55			      <entry>start&nbsp;+&nbsp;16:</entry>
56			      <entry>Y'<subscript>20</subscript></entry>
57			      <entry>Cb<subscript>20</subscript></entry>
58			      <entry>Y'<subscript>21</subscript></entry>
59			      <entry>Cr<subscript>20</subscript></entry>
60			      <entry>Y'<subscript>22</subscript></entry>
61			      <entry>Cb<subscript>21</subscript></entry>
62			      <entry>Y'<subscript>23</subscript></entry>
63			      <entry>Cr<subscript>21</subscript></entry>
64			    </row>
65			    <row>
66			      <entry>start&nbsp;+&nbsp;24:</entry>
67			      <entry>Y'<subscript>30</subscript></entry>
68			      <entry>Cb<subscript>30</subscript></entry>
69			      <entry>Y'<subscript>31</subscript></entry>
70			      <entry>Cr<subscript>30</subscript></entry>
71			      <entry>Y'<subscript>32</subscript></entry>
72			      <entry>Cb<subscript>31</subscript></entry>
73			      <entry>Y'<subscript>33</subscript></entry>
74			      <entry>Cr<subscript>31</subscript></entry>
75			    </row>
76			  </tbody>
77			</tgroup>
78			</informaltable>
79		      </para>
80		  </formalpara>
81	
82		  <formalpara>
83		    <title>Color Sample Location.</title>
84		    <para>
85			<informaltable frame="none">
86			<tgroup cols="7" align="center">
87			  <tbody valign="top">
88			    <row>
89			      <entry></entry>
90			      <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
91			      <entry>2</entry><entry></entry><entry>3</entry>
92			    </row>
93			    <row>
94			      <entry>0</entry>
95			      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
96			      <entry>Y</entry><entry>C</entry><entry>Y</entry>
97			    </row>
98			    <row>
99			      <entry>1</entry>
100			      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
101			      <entry>Y</entry><entry>C</entry><entry>Y</entry>
102			    </row>
103			    <row>
104			      <entry>2</entry>
105			      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
106			      <entry>Y</entry><entry>C</entry><entry>Y</entry>
107			    </row>
108			    <row>
109			      <entry>3</entry>
110			      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
111			      <entry>Y</entry><entry>C</entry><entry>Y</entry>
112			    </row>
113			  </tbody>
114			</tgroup>
115			</informaltable>
116		      </para>
117		  </formalpara>
118		</example>
119	      </refsect1>
120	    </refentry>
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