aboutsummaryrefslogtreecommitdiff
path: root/Documentation/DocBook/media/v4l/pixfmt-nv24.xml
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/DocBook/media/v4l/pixfmt-nv24.xml')
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-nv24.xml121
1 files changed, 121 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv24.xml b/Documentation/DocBook/media/v4l/pixfmt-nv24.xml
new file mode 100644
index 00000000..fb255f2c
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-nv24.xml
@@ -0,0 +1,121 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_NV24 ('NV24'), V4L2_PIX_FMT_NV42 ('NV42')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-NV24"><constant>V4L2_PIX_FMT_NV24</constant></refname>
+ <refname id="V4L2-PIX-FMT-NV42"><constant>V4L2_PIX_FMT_NV42</constant></refname>
+ <refpurpose>Formats with full horizontal and vertical
+chroma resolutions, also known as YUV 4:4:4. One luminance and one
+chrominance plane with alternating chroma samples as opposed to
+<constant>V4L2_PIX_FMT_YVU420</constant></refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These are two-plane versions of the YUV 4:4:4 format. The three
+ components are separated into two sub-images or planes. The Y plane is
+ first, with each Y sample stored in one byte per pixel. For
+ <constant>V4L2_PIX_FMT_NV24</constant>, a combined CbCr plane
+ immediately follows the Y plane in memory. The CbCr plane has the same
+ width and height, in pixels, as the Y plane (and the image). Each line
+ contains one CbCr pair per pixel, with each Cb and Cr sample stored in
+ one byte. <constant>V4L2_PIX_FMT_NV42</constant> is the same except that
+ the Cb and Cr samples are swapped, the CrCb plane starts with a Cr
+ sample.</para>
+
+ <para>If the Y plane has pad bytes after each row, then the CbCr plane
+ has twice as many pad bytes after its rows.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_NV24</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="9" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ <entry>Cb<subscript>02</subscript></entry>
+ <entry>Cr<subscript>02</subscript></entry>
+ <entry>Cb<subscript>03</subscript></entry>
+ <entry>Cr<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ <entry>Cb<subscript>12</subscript></entry>
+ <entry>Cr<subscript>12</subscript></entry>
+ <entry>Cb<subscript>13</subscript></entry>
+ <entry>Cr<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;32:</entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ <entry>Cb<subscript>22</subscript></entry>
+ <entry>Cr<subscript>22</subscript></entry>
+ <entry>Cb<subscript>23</subscript></entry>
+ <entry>Cr<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;40:</entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Cb<subscript>31</subscript></entry>
+ <entry>Cr<subscript>31</subscript></entry>
+ <entry>Cb<subscript>32</subscript></entry>
+ <entry>Cr<subscript>32</subscript></entry>
+ <entry>Cb<subscript>33</subscript></entry>
+ <entry>Cr<subscript>33</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>