1 <refentry id=
"V4L2-PIX-FMT-M420">
3 <refentrytitle>V4L2_PIX_FMT_M420 ('M420')
</refentrytitle>
7 <refname><constant>V4L2_PIX_FMT_M420
</constant></refname>
8 <refpurpose>Format with
½ horizontal and vertical chroma
9 resolution, also known as YUV
4:
2:
0. Hybrid plane line-interleaved
13 <title>Description
</title>
15 <para>M420 is a YUV format with
½ horizontal and vertical chroma
16 subsampling (YUV
4:
2:
0). Pixels are organized as interleaved luma and
17 chroma planes. Two lines of luma data are followed by one line of chroma
19 <para>The luma plane has one byte per pixel. The chroma plane contains
20 interleaved CbCr pixels subsampled by
½ in the horizontal and
21 vertical directions. Each CbCr pair belongs to four pixels. For example,
22 Cb
<subscript>0</subscript>/Cr
<subscript>0</subscript> belongs to
23 Y'
<subscript>00</subscript>, Y'
<subscript>01</subscript>,
24 Y'
<subscript>10</subscript>, Y'
<subscript>11</subscript>.
</para>
26 <para>All line lengths are identical: if the Y lines include pad bytes
27 so do the CbCr lines.
</para>
30 <title><constant>V4L2_PIX_FMT_M420
</constant> 4 × 4
34 <title>Byte Order.
</title>
35 <para>Each cell is one byte.
36 <informaltable frame=
"none">
37 <tgroup cols=
"5" align=
"center">
38 <colspec align=
"left" colwidth=
"2*" />
41 <entry>start
+
0:
</entry>
42 <entry>Y'
<subscript>00</subscript></entry>
43 <entry>Y'
<subscript>01</subscript></entry>
44 <entry>Y'
<subscript>02</subscript></entry>
45 <entry>Y'
<subscript>03</subscript></entry>
48 <entry>start
+
4:
</entry>
49 <entry>Y'
<subscript>10</subscript></entry>
50 <entry>Y'
<subscript>11</subscript></entry>
51 <entry>Y'
<subscript>12</subscript></entry>
52 <entry>Y'
<subscript>13</subscript></entry>
55 <entry>start
+
8:
</entry>
56 <entry>Cb
<subscript>00</subscript></entry>
57 <entry>Cr
<subscript>00</subscript></entry>
58 <entry>Cb
<subscript>01</subscript></entry>
59 <entry>Cr
<subscript>01</subscript></entry>
62 <entry>start
+
16:
</entry>
63 <entry>Y'
<subscript>20</subscript></entry>
64 <entry>Y'
<subscript>21</subscript></entry>
65 <entry>Y'
<subscript>22</subscript></entry>
66 <entry>Y'
<subscript>23</subscript></entry>
69 <entry>start
+
20:
</entry>
70 <entry>Y'
<subscript>30</subscript></entry>
71 <entry>Y'
<subscript>31</subscript></entry>
72 <entry>Y'
<subscript>32</subscript></entry>
73 <entry>Y'
<subscript>33</subscript></entry>
76 <entry>start
+
24:
</entry>
77 <entry>Cb
<subscript>10</subscript></entry>
78 <entry>Cr
<subscript>10</subscript></entry>
79 <entry>Cb
<subscript>11</subscript></entry>
80 <entry>Cr
<subscript>11</subscript></entry>
89 <title>Color Sample Location.
</title>
91 <informaltable frame=
"none">
92 <tgroup cols=
"7" align=
"center">
96 <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
97 <entry>2</entry><entry></entry><entry>3</entry>
101 <entry>Y
</entry><entry></entry><entry>Y
</entry><entry></entry>
102 <entry>Y
</entry><entry></entry><entry>Y
</entry>
106 <entry></entry><entry>C
</entry><entry></entry><entry></entry>
107 <entry></entry><entry>C
</entry><entry></entry>
111 <entry>Y
</entry><entry></entry><entry>Y
</entry><entry></entry>
112 <entry>Y
</entry><entry></entry><entry>Y
</entry>
119 <entry>Y
</entry><entry></entry><entry>Y
</entry><entry></entry>
120 <entry>Y
</entry><entry></entry><entry>Y
</entry>
124 <entry></entry><entry>C
</entry><entry></entry><entry></entry>
125 <entry></entry><entry>C
</entry><entry></entry>
129 <entry>Y
</entry><entry></entry><entry>Y
</entry><entry></entry>
130 <entry>Y
</entry><entry></entry><entry>Y
</entry>
144 sgml-parent-document: "pixfmt.sgml"
145 indent-tabs-mode: nil