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1 | .. -*- coding: utf-8; mode: rst -*- |
2 | ||
3 | .. _V4L2-PIX-FMT-NV16: | |
4 | ||
5 | ****************************************************** | |
6 | V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61') | |
7 | ****************************************************** | |
8 | ||
9 | *man V4L2_PIX_FMT_NV16(2)* | |
10 | ||
11 | V4L2_PIX_FMT_NV61 | |
12 | Formats with ½ horizontal chroma resolution, also known as YUV 4:2:2. | |
13 | One luminance and one chrominance plane with alternating chroma samples | |
14 | as opposed to ``V4L2_PIX_FMT_YVU420`` | |
15 | ||
16 | ||
17 | Description | |
18 | =========== | |
19 | ||
20 | These are two-plane versions of the YUV 4:2:2 format. The three | |
21 | components are separated into two sub-images or planes. The Y plane is | |
22 | first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_NV16``, a | |
23 | combined CbCr plane immediately follows the Y plane in memory. The CbCr | |
24 | plane is the same width and height, in bytes, as the Y plane (and of the | |
25 | image). Each CbCr pair belongs to two pixels. For example, | |
eba9e91c | 26 | Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`. |
5377d91f MH |
27 | ``V4L2_PIX_FMT_NV61`` is the same except the Cb and Cr bytes are |
28 | swapped, the CrCb plane starts with a Cr byte. | |
29 | ||
30 | If the Y plane has pad bytes after each row, then the CbCr plane has as | |
31 | many pad bytes after its rows. | |
32 | ||
ce0b746b | 33 | **Byte Order.** |
5377d91f MH |
34 | Each cell is one byte. |
35 | ||
36 | ||
37 | ||
38 | .. flat-table:: | |
39 | :header-rows: 0 | |
40 | :stub-columns: 0 | |
41 | :widths: 2 1 1 1 1 | |
42 | ||
43 | ||
44 | - .. row 1 | |
45 | ||
46 | - start + 0: | |
47 | ||
48 | - Y'\ :sub:`00` | |
49 | ||
50 | - Y'\ :sub:`01` | |
51 | ||
52 | - Y'\ :sub:`02` | |
53 | ||
54 | - Y'\ :sub:`03` | |
55 | ||
56 | - .. row 2 | |
57 | ||
58 | - start + 4: | |
59 | ||
60 | - Y'\ :sub:`10` | |
61 | ||
62 | - Y'\ :sub:`11` | |
63 | ||
64 | - Y'\ :sub:`12` | |
65 | ||
66 | - Y'\ :sub:`13` | |
67 | ||
68 | - .. row 3 | |
69 | ||
70 | - start + 8: | |
71 | ||
72 | - Y'\ :sub:`20` | |
73 | ||
74 | - Y'\ :sub:`21` | |
75 | ||
76 | - Y'\ :sub:`22` | |
77 | ||
78 | - Y'\ :sub:`23` | |
79 | ||
80 | - .. row 4 | |
81 | ||
82 | - start + 12: | |
83 | ||
84 | - Y'\ :sub:`30` | |
85 | ||
86 | - Y'\ :sub:`31` | |
87 | ||
88 | - Y'\ :sub:`32` | |
89 | ||
90 | - Y'\ :sub:`33` | |
91 | ||
92 | - .. row 5 | |
93 | ||
94 | - start + 16: | |
95 | ||
96 | - Cb\ :sub:`00` | |
97 | ||
98 | - Cr\ :sub:`00` | |
99 | ||
100 | - Cb\ :sub:`01` | |
101 | ||
102 | - Cr\ :sub:`01` | |
103 | ||
104 | - .. row 6 | |
105 | ||
106 | - start + 20: | |
107 | ||
108 | - Cb\ :sub:`10` | |
109 | ||
110 | - Cr\ :sub:`10` | |
111 | ||
112 | - Cb\ :sub:`11` | |
113 | ||
114 | - Cr\ :sub:`11` | |
115 | ||
116 | - .. row 7 | |
117 | ||
118 | - start + 24: | |
119 | ||
120 | - Cb\ :sub:`20` | |
121 | ||
122 | - Cr\ :sub:`20` | |
123 | ||
124 | - Cb\ :sub:`21` | |
125 | ||
126 | - Cr\ :sub:`21` | |
127 | ||
128 | - .. row 8 | |
129 | ||
130 | - start + 28: | |
131 | ||
132 | - Cb\ :sub:`30` | |
133 | ||
134 | - Cr\ :sub:`30` | |
135 | ||
136 | - Cb\ :sub:`31` | |
137 | ||
138 | - Cr\ :sub:`31` | |
139 | ||
140 | ||
141 | **Color Sample Location..** | |
142 | ||
143 | ||
144 | ||
145 | .. flat-table:: | |
146 | :header-rows: 0 | |
147 | :stub-columns: 0 | |
148 | ||
149 | ||
150 | - .. row 1 | |
151 | ||
152 | - | |
153 | - 0 | |
154 | ||
155 | - | |
156 | - 1 | |
157 | ||
5377d91f MH |
158 | - 2 |
159 | ||
160 | - | |
161 | - 3 | |
162 | ||
163 | - .. row 2 | |
164 | ||
165 | - 0 | |
166 | ||
167 | - Y | |
168 | ||
169 | - | |
170 | - Y | |
171 | ||
5377d91f MH |
172 | - Y |
173 | ||
174 | - | |
175 | - Y | |
176 | ||
177 | - .. row 3 | |
178 | ||
179 | - | |
180 | - | |
181 | - C | |
182 | ||
5377d91f MH |
183 | - |
184 | - | |
185 | - C | |
186 | ||
187 | - | |
188 | ||
189 | - .. row 4 | |
190 | ||
191 | - 1 | |
192 | ||
193 | - Y | |
194 | ||
195 | - | |
196 | - Y | |
197 | ||
5377d91f MH |
198 | - Y |
199 | ||
200 | - | |
201 | - Y | |
202 | ||
203 | - .. row 5 | |
204 | ||
205 | - | |
206 | - | |
207 | - C | |
208 | ||
5377d91f MH |
209 | - |
210 | - | |
211 | - C | |
212 | ||
213 | - | |
214 | ||
215 | - .. row 6 | |
216 | ||
217 | - | |
218 | ||
219 | - .. row 7 | |
220 | ||
221 | - 2 | |
222 | ||
223 | - Y | |
224 | ||
225 | - | |
226 | - Y | |
227 | ||
5377d91f MH |
228 | - Y |
229 | ||
230 | - | |
231 | - Y | |
232 | ||
233 | - .. row 8 | |
234 | ||
235 | - | |
236 | - | |
237 | - C | |
238 | ||
5377d91f MH |
239 | - |
240 | - | |
241 | - C | |
242 | ||
243 | - | |
244 | ||
245 | - .. row 9 | |
246 | ||
247 | - 3 | |
248 | ||
249 | - Y | |
250 | ||
251 | - | |
252 | - Y | |
253 | ||
5377d91f MH |
254 | - Y |
255 | ||
256 | - | |
257 | - Y | |
258 | ||
259 | - .. row 10 | |
260 | ||
261 | - | |
262 | - | |
263 | - C | |
264 | ||
5377d91f MH |
265 | - |
266 | - | |
267 | - C | |
268 | ||
269 | - |