diff options
author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-13 21:16:04 -0400 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-18 22:47:55 -0400 |
commit | 8e080c2e6cadada82a6b520e0c23a1cb974822d5 (patch) | |
tree | 991450ff1abba98e5313906478c33816a202ccab /Documentation/DocBook/v4l/pixfmt-nv16.xml | |
parent | f4e96deb4513d044653027d4921fd7592195503a (diff) |
V4L/DVB (12761): DocBook: add media API specs
The V4L and DVB API's are there for a long time. however, up to now,
no efforts were done to merge them to kernel DocBook.
This patch adds the current versions of the specs as an unique compendium.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/DocBook/v4l/pixfmt-nv16.xml')
-rw-r--r-- | Documentation/DocBook/v4l/pixfmt-nv16.xml | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/Documentation/DocBook/v4l/pixfmt-nv16.xml b/Documentation/DocBook/v4l/pixfmt-nv16.xml new file mode 100644 index 000000000000..26094035fc04 --- /dev/null +++ b/Documentation/DocBook/v4l/pixfmt-nv16.xml | |||
@@ -0,0 +1,174 @@ | |||
1 | <refentry> | ||
2 | <refmeta> | ||
3 | <refentrytitle>V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61')</refentrytitle> | ||
4 | &manvol; | ||
5 | </refmeta> | ||
6 | <refnamediv> | ||
7 | <refname id="V4L2-PIX-FMT-NV16"><constant>V4L2_PIX_FMT_NV16</constant></refname> | ||
8 | <refname id="V4L2-PIX-FMT-NV61"><constant>V4L2_PIX_FMT_NV61</constant></refname> | ||
9 | <refpurpose>Formats with ½ horizontal | ||
10 | chroma resolution, also known as YUV 4:2:2. One luminance and one | ||
11 | chrominance plane with alternating chroma samples as opposed to | ||
12 | <constant>V4L2_PIX_FMT_YVU420</constant></refpurpose> | ||
13 | </refnamediv> | ||
14 | <refsect1> | ||
15 | <title>Description</title> | ||
16 | |||
17 | <para>These are two-plane versions of the YUV 4:2:2 format. | ||
18 | The three components are separated into two sub-images or planes. The | ||
19 | Y plane is first. The Y plane has one byte per pixel. For | ||
20 | <constant>V4L2_PIX_FMT_NV16</constant>, a combined CbCr plane | ||
21 | immediately follows the Y plane in memory. The CbCr plane is the same | ||
22 | width and height, in bytes, as the Y plane (and of the image). | ||
23 | Each CbCr pair belongs to two pixels. For example, | ||
24 | Cb<subscript>0</subscript>/Cr<subscript>0</subscript> belongs to | ||
25 | Y'<subscript>00</subscript>, Y'<subscript>01</subscript>. | ||
26 | <constant>V4L2_PIX_FMT_NV61</constant> is the same except the Cb and | ||
27 | Cr bytes are swapped, the CrCb plane starts with a Cr byte.</para> | ||
28 | |||
29 | <para>If the Y plane has pad bytes after each row, then the | ||
30 | CbCr plane has as many pad bytes after its rows.</para> | ||
31 | |||
32 | <example> | ||
33 | <title><constant>V4L2_PIX_FMT_NV16</constant> 4 × 4 | ||
34 | pixel image</title> | ||
35 | |||
36 | <formalpara> | ||
37 | <title>Byte Order.</title> | ||
38 | <para>Each cell is one byte. | ||
39 | <informaltable frame="none"> | ||
40 | <tgroup cols="5" align="center"> | ||
41 | <colspec align="left" colwidth="2*" /> | ||
42 | <tbody valign="top"> | ||
43 | <row> | ||
44 | <entry>start + 0:</entry> | ||
45 | <entry>Y'<subscript>00</subscript></entry> | ||
46 | <entry>Y'<subscript>01</subscript></entry> | ||
47 | <entry>Y'<subscript>02</subscript></entry> | ||
48 | <entry>Y'<subscript>03</subscript></entry> | ||
49 | </row> | ||
50 | <row> | ||
51 | <entry>start + 4:</entry> | ||
52 | <entry>Y'<subscript>10</subscript></entry> | ||
53 | <entry>Y'<subscript>11</subscript></entry> | ||
54 | <entry>Y'<subscript>12</subscript></entry> | ||
55 | <entry>Y'<subscript>13</subscript></entry> | ||
56 | </row> | ||
57 | <row> | ||
58 | <entry>start + 8:</entry> | ||
59 | <entry>Y'<subscript>20</subscript></entry> | ||
60 | <entry>Y'<subscript>21</subscript></entry> | ||
61 | <entry>Y'<subscript>22</subscript></entry> | ||
62 | <entry>Y'<subscript>23</subscript></entry> | ||
63 | </row> | ||
64 | <row> | ||
65 | <entry>start + 12:</entry> | ||
66 | <entry>Y'<subscript>30</subscript></entry> | ||
67 | <entry>Y'<subscript>31</subscript></entry> | ||
68 | <entry>Y'<subscript>32</subscript></entry> | ||
69 | <entry>Y'<subscript>33</subscript></entry> | ||
70 | </row> | ||
71 | <row> | ||
72 | <entry>start + 16:</entry> | ||
73 | <entry>Cb<subscript>00</subscript></entry> | ||
74 | <entry>Cr<subscript>00</subscript></entry> | ||
75 | <entry>Cb<subscript>01</subscript></entry> | ||
76 | <entry>Cr<subscript>01</subscript></entry> | ||
77 | </row> | ||
78 | <row> | ||
79 | <entry>start + 20:</entry> | ||
80 | <entry>Cb<subscript>10</subscript></entry> | ||
81 | <entry>Cr<subscript>10</subscript></entry> | ||
82 | <entry>Cb<subscript>11</subscript></entry> | ||
83 | <entry>Cr<subscript>11</subscript></entry> | ||
84 | </row> | ||
85 | <row> | ||
86 | <entry>start + 24:</entry> | ||
87 | <entry>Cb<subscript>20</subscript></entry> | ||
88 | <entry>Cr<subscript>20</subscript></entry> | ||
89 | <entry>Cb<subscript>21</subscript></entry> | ||
90 | <entry>Cr<subscript>21</subscript></entry> | ||
91 | </row> | ||
92 | <row> | ||
93 | <entry>start + 28:</entry> | ||
94 | <entry>Cb<subscript>30</subscript></entry> | ||
95 | <entry>Cr<subscript>30</subscript></entry> | ||
96 | <entry>Cb<subscript>31</subscript></entry> | ||
97 | <entry>Cr<subscript>31</subscript></entry> | ||
98 | </row> | ||
99 | </tbody> | ||
100 | </tgroup> | ||
101 | </informaltable> | ||
102 | </para> | ||
103 | </formalpara> | ||
104 | |||
105 | <formalpara> | ||
106 | <title>Color Sample Location.</title> | ||
107 | <para> | ||
108 | <informaltable frame="none"> | ||
109 | <tgroup cols="7" align="center"> | ||
110 | <tbody valign="top"> | ||
111 | <row> | ||
112 | <entry></entry> | ||
113 | <entry>0</entry><entry></entry><entry>1</entry><entry></entry> | ||
114 | <entry>2</entry><entry></entry><entry>3</entry> | ||
115 | </row> | ||
116 | <row> | ||
117 | <entry>0</entry> | ||
118 | <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> | ||
119 | <entry>Y</entry><entry></entry><entry>Y</entry> | ||
120 | </row> | ||
121 | <row> | ||
122 | <entry></entry> | ||
123 | <entry></entry><entry>C</entry><entry></entry><entry></entry> | ||
124 | <entry></entry><entry>C</entry><entry></entry> | ||
125 | </row> | ||
126 | <row> | ||
127 | <entry>1</entry> | ||
128 | <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> | ||
129 | <entry>Y</entry><entry></entry><entry>Y</entry> | ||
130 | </row> | ||
131 | <row> | ||
132 | <entry></entry> | ||
133 | <entry></entry><entry>C</entry><entry></entry><entry></entry> | ||
134 | <entry></entry><entry>C</entry><entry></entry> | ||
135 | </row> | ||
136 | <row> | ||
137 | <entry></entry> | ||
138 | </row> | ||
139 | <row> | ||
140 | <entry>2</entry> | ||
141 | <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> | ||
142 | <entry>Y</entry><entry></entry><entry>Y</entry> | ||
143 | </row> | ||
144 | <row> | ||
145 | <entry></entry> | ||
146 | <entry></entry><entry>C</entry><entry></entry><entry></entry> | ||
147 | <entry></entry><entry>C</entry><entry></entry> | ||
148 | </row> | ||
149 | <row> | ||
150 | <entry>3</entry> | ||
151 | <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> | ||
152 | <entry>Y</entry><entry></entry><entry>Y</entry> | ||
153 | </row> | ||
154 | <row> | ||
155 | <entry></entry> | ||
156 | <entry></entry><entry>C</entry><entry></entry><entry></entry> | ||
157 | <entry></entry><entry>C</entry><entry></entry> | ||
158 | </row> | ||
159 | </tbody> | ||
160 | </tgroup> | ||
161 | </informaltable> | ||
162 | </para> | ||
163 | </formalpara> | ||
164 | </example> | ||
165 | </refsect1> | ||
166 | </refentry> | ||
167 | |||
168 | <!-- | ||
169 | Local Variables: | ||
170 | mode: sgml | ||
171 | sgml-parent-document: "pixfmt.sgml" | ||
172 | indent-tabs-mode: nil | ||
173 | End: | ||
174 | --> | ||