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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-Y41P">
2	      <refmeta>
3		<refentrytitle>V4L2_PIX_FMT_Y41P ('Y41P')</refentrytitle>
4		&manvol;
5	      </refmeta>
6	      <refnamediv>
7		<refname><constant>V4L2_PIX_FMT_Y41P</constant></refname>
8		<refpurpose>Format with &frac14; horizontal chroma
9	resolution, also known as YUV 4:1:1</refpurpose>
10	      </refnamediv>
11	      <refsect1>
12		<title>Description</title>
13	
14		<para>In this format each 12 bytes is eight pixels. In the
15	twelve bytes are two CbCr pairs and eight Y's. The first CbCr pair
16	goes with the first four Y's, and the second CbCr pair goes with the
17	other four Y's. The Cb and Cr components have one fourth the
18	horizontal resolution of the Y component.</para>
19	
20		<para>Do not confuse this format with <link
21	linkend="V4L2-PIX-FMT-YUV411P"><constant>V4L2_PIX_FMT_YUV411P</constant></link>.
22	Y41P is derived from "YUV 4:1:1 <emphasis>packed</emphasis>", while
23	YUV411P stands for "YUV 4:1:1 <emphasis>planar</emphasis>".</para>
24	
25		<example>
26		  <title><constant>V4L2_PIX_FMT_Y41P</constant> 8 &times; 4
27	pixel image</title>
28	
29		  <formalpara>
30		    <title>Byte Order</title>
31		    <para>Each cell is one byte.
32			<informaltable frame="none">
33			<tgroup cols="13" align="center">
34			  <colspec align="left" colwidth="2*" />
35			  <tbody valign="top">
36			    <row>
37			      <entry>start&nbsp;+&nbsp;0:</entry>
38			      <entry>Cb<subscript>00</subscript></entry>
39			      <entry>Y'<subscript>00</subscript></entry>
40			      <entry>Cr<subscript>00</subscript></entry>
41			      <entry>Y'<subscript>01</subscript></entry>
42			      <entry>Cb<subscript>01</subscript></entry>
43			      <entry>Y'<subscript>02</subscript></entry>
44			      <entry>Cr<subscript>01</subscript></entry>
45			      <entry>Y'<subscript>03</subscript></entry>
46			      <entry>Y'<subscript>04</subscript></entry>
47			      <entry>Y'<subscript>05</subscript></entry>
48			      <entry>Y'<subscript>06</subscript></entry>
49			      <entry>Y'<subscript>07</subscript></entry>
50			    </row>
51			    <row>
52			      <entry>start&nbsp;+&nbsp;12:</entry>
53			      <entry>Cb<subscript>10</subscript></entry>
54			      <entry>Y'<subscript>10</subscript></entry>
55			      <entry>Cr<subscript>10</subscript></entry>
56			      <entry>Y'<subscript>11</subscript></entry>
57			      <entry>Cb<subscript>11</subscript></entry>
58			      <entry>Y'<subscript>12</subscript></entry>
59			      <entry>Cr<subscript>11</subscript></entry>
60			      <entry>Y'<subscript>13</subscript></entry>
61			      <entry>Y'<subscript>14</subscript></entry>
62			      <entry>Y'<subscript>15</subscript></entry>
63			      <entry>Y'<subscript>16</subscript></entry>
64			      <entry>Y'<subscript>17</subscript></entry>
65			    </row>
66			    <row>
67			      <entry>start&nbsp;+&nbsp;24:</entry>
68			      <entry>Cb<subscript>20</subscript></entry>
69			      <entry>Y'<subscript>20</subscript></entry>
70			      <entry>Cr<subscript>20</subscript></entry>
71			      <entry>Y'<subscript>21</subscript></entry>
72			      <entry>Cb<subscript>21</subscript></entry>
73			      <entry>Y'<subscript>22</subscript></entry>
74			      <entry>Cr<subscript>21</subscript></entry>
75			      <entry>Y'<subscript>23</subscript></entry>
76			      <entry>Y'<subscript>24</subscript></entry>
77			      <entry>Y'<subscript>25</subscript></entry>
78			      <entry>Y'<subscript>26</subscript></entry>
79			      <entry>Y'<subscript>27</subscript></entry>
80			    </row>
81			    <row>
82			      <entry>start&nbsp;+&nbsp;36:</entry>
83			      <entry>Cb<subscript>30</subscript></entry>
84			      <entry>Y'<subscript>30</subscript></entry>
85			      <entry>Cr<subscript>30</subscript></entry>
86			      <entry>Y'<subscript>31</subscript></entry>
87			      <entry>Cb<subscript>31</subscript></entry>
88			      <entry>Y'<subscript>32</subscript></entry>
89			      <entry>Cr<subscript>31</subscript></entry>
90			      <entry>Y'<subscript>33</subscript></entry>
91			      <entry>Y'<subscript>34</subscript></entry>
92			      <entry>Y'<subscript>35</subscript></entry>
93			      <entry>Y'<subscript>36</subscript></entry>
94			      <entry>Y'<subscript>37</subscript></entry>
95			    </row>
96			  </tbody>
97			</tgroup>
98		      </informaltable></para>
99		  </formalpara>
100	
101		  <formalpara>
102		    <title>Color Sample Location.</title>
103		    <para>
104			<informaltable frame="none">
105			<tgroup cols="15" align="center">
106			  <tbody valign="top">
107			    <row>
108			      <entry></entry>
109			      <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
110			      <entry>2</entry><entry></entry><entry>3</entry><entry></entry>
111			      <entry>4</entry><entry></entry><entry>5</entry><entry></entry>
112			      <entry>6</entry><entry></entry><entry>7</entry>
113			    </row>
114			    <row>
115			      <entry>0</entry>
116			      <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
117			      <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
118			      <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
119			      <entry>Y</entry><entry></entry><entry>Y</entry>
120			    </row>
121			    <row>
122			      <entry>1</entry>
123			      <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
124			      <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
125			      <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
126			      <entry>Y</entry><entry></entry><entry>Y</entry>
127			    </row>
128			    <row>
129			      <entry>2</entry>
130			      <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
131			      <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
132			      <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
133			      <entry>Y</entry><entry></entry><entry>Y</entry>
134			    </row>
135			    <row>
136			      <entry>3</entry>
137			      <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
138			      <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
139			      <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
140			      <entry>Y</entry><entry></entry><entry>Y</entry>
141			    </row>
142			  </tbody>
143			</tgroup>
144			</informaltable>
145		      </para>
146		  </formalpara>
147		</example>
148	      </refsect1>
149	    </refentry>
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