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1 | .. -*- coding: utf-8; mode: rst -*- |
2 | ||
3 | .. _V4L2-PIX-FMT-YUV422P: | |
4 | ||
5 | ***************************** | |
6 | V4L2_PIX_FMT_YUV422P ('422P') | |
7 | ***************************** | |
8 | ||
5377d91f MH |
9 | |
10 | Format with ½ horizontal chroma resolution, also known as YUV 4:2:2. | |
11 | Planar layout as opposed to ``V4L2_PIX_FMT_YUYV`` | |
12 | ||
13 | ||
14 | Description | |
15 | =========== | |
16 | ||
17 | This format is not commonly used. This is a planar version of the YUYV | |
18 | format. The three components are separated into three sub-images or | |
19 | planes. The Y plane is first. The Y plane has one byte per pixel. The Cb | |
20 | plane immediately follows the Y plane in memory. The Cb plane is half | |
21 | the width of the Y plane (and of the image). Each Cb belongs to two | |
22 | pixels. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, | |
23 | Y'\ :sub:`01`. Following the Cb plane is the Cr plane, just like the Cb | |
24 | plane. | |
25 | ||
26 | If the Y plane has pad bytes after each row, then the Cr and Cb planes | |
27 | have half as many pad bytes after their rows. In other words, two Cx | |
28 | rows (including padding) is exactly as long as one Y row (including | |
29 | padding). | |
30 | ||
056d2ee6 | 31 | **Byte Order.** |
5377d91f MH |
32 | Each cell is one byte. |
33 | ||
34 | ||
35 | ||
5bd4bb78 | 36 | |
5377d91f MH |
37 | .. flat-table:: |
38 | :header-rows: 0 | |
39 | :stub-columns: 0 | |
5377d91f MH |
40 | |
41 | ||
42 | - .. row 1 | |
43 | ||
44 | - start + 0: | |
45 | ||
46 | - Y'\ :sub:`00` | |
47 | ||
48 | - Y'\ :sub:`01` | |
49 | ||
50 | - Y'\ :sub:`02` | |
51 | ||
52 | - Y'\ :sub:`03` | |
53 | ||
54 | - .. row 2 | |
55 | ||
56 | - start + 4: | |
57 | ||
58 | - Y'\ :sub:`10` | |
59 | ||
60 | - Y'\ :sub:`11` | |
61 | ||
62 | - Y'\ :sub:`12` | |
63 | ||
64 | - Y'\ :sub:`13` | |
65 | ||
66 | - .. row 3 | |
67 | ||
68 | - start + 8: | |
69 | ||
70 | - Y'\ :sub:`20` | |
71 | ||
72 | - Y'\ :sub:`21` | |
73 | ||
74 | - Y'\ :sub:`22` | |
75 | ||
76 | - Y'\ :sub:`23` | |
77 | ||
78 | - .. row 4 | |
79 | ||
80 | - start + 12: | |
81 | ||
82 | - Y'\ :sub:`30` | |
83 | ||
84 | - Y'\ :sub:`31` | |
85 | ||
86 | - Y'\ :sub:`32` | |
87 | ||
88 | - Y'\ :sub:`33` | |
89 | ||
90 | - .. row 5 | |
91 | ||
92 | - start + 16: | |
93 | ||
94 | - Cb\ :sub:`00` | |
95 | ||
96 | - Cb\ :sub:`01` | |
97 | ||
98 | - .. row 6 | |
99 | ||
100 | - start + 18: | |
101 | ||
102 | - Cb\ :sub:`10` | |
103 | ||
104 | - Cb\ :sub:`11` | |
105 | ||
106 | - .. row 7 | |
107 | ||
108 | - start + 20: | |
109 | ||
110 | - Cb\ :sub:`20` | |
111 | ||
112 | - Cb\ :sub:`21` | |
113 | ||
114 | - .. row 8 | |
115 | ||
116 | - start + 22: | |
117 | ||
118 | - Cb\ :sub:`30` | |
119 | ||
120 | - Cb\ :sub:`31` | |
121 | ||
122 | - .. row 9 | |
123 | ||
124 | - start + 24: | |
125 | ||
126 | - Cr\ :sub:`00` | |
127 | ||
128 | - Cr\ :sub:`01` | |
129 | ||
130 | - .. row 10 | |
131 | ||
132 | - start + 26: | |
133 | ||
134 | - Cr\ :sub:`10` | |
135 | ||
136 | - Cr\ :sub:`11` | |
137 | ||
138 | - .. row 11 | |
139 | ||
140 | - start + 28: | |
141 | ||
142 | - Cr\ :sub:`20` | |
143 | ||
144 | - Cr\ :sub:`21` | |
145 | ||
146 | - .. row 12 | |
147 | ||
148 | - start + 30: | |
149 | ||
150 | - Cr\ :sub:`30` | |
151 | ||
152 | - Cr\ :sub:`31` | |
153 | ||
154 | ||
155 | **Color Sample Location..** | |
156 | ||
157 | ||
158 | ||
159 | .. flat-table:: | |
160 | :header-rows: 0 | |
161 | :stub-columns: 0 | |
162 | ||
163 | ||
164 | - .. row 1 | |
165 | ||
0579e6e3 | 166 | - |
5377d91f MH |
167 | - 0 |
168 | ||
0579e6e3 | 169 | - |
5377d91f MH |
170 | - 1 |
171 | ||
5377d91f MH |
172 | - 2 |
173 | ||
0579e6e3 | 174 | - |
5377d91f MH |
175 | - 3 |
176 | ||
177 | - .. row 2 | |
178 | ||
179 | - 0 | |
180 | ||
181 | - Y | |
182 | ||
183 | - C | |
184 | ||
185 | - Y | |
186 | ||
5377d91f MH |
187 | - Y |
188 | ||
189 | - C | |
190 | ||
191 | - Y | |
192 | ||
193 | - .. row 3 | |
194 | ||
195 | - 1 | |
196 | ||
197 | - Y | |
198 | ||
199 | - C | |
200 | ||
201 | - Y | |
202 | ||
5377d91f MH |
203 | - Y |
204 | ||
205 | - C | |
206 | ||
207 | - Y | |
208 | ||
209 | - .. row 4 | |
210 | ||
211 | - 2 | |
212 | ||
213 | - Y | |
214 | ||
215 | - C | |
216 | ||
217 | - Y | |
218 | ||
5377d91f MH |
219 | - Y |
220 | ||
221 | - C | |
222 | ||
223 | - Y | |
224 | ||
225 | - .. row 5 | |
226 | ||
227 | - 3 | |
228 | ||
229 | - Y | |
230 | ||
231 | - C | |
232 | ||
233 | - Y | |
234 | ||
5377d91f MH |
235 | - Y |
236 | ||
237 | - C | |
238 | ||
239 | - Y |