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author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-05-31 16:27:44 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-07-27 17:52:05 -0300 |
commit | 4266129964b8238526936d723de65b419d8069c6 (patch) | |
tree | 38c6b5cd3dc99b8599391ffad3b87e399bef56a2 /Documentation/DocBook/media/v4l/pixfmt-y41p.xml | |
parent | 04893043ae9ea8aa82b712491ed25ba6c4ffbca3 (diff) | |
download | linux-4266129964b8238526936d723de65b419d8069c6.tar.bz2 |
[media] DocBook: Move all media docbook stuff into its own directory
This patch addresses several issues pointed by Randy Dunlap
<rdunlap@xenotime.net> at changeset ece722c:
- In the generated index.html file, "media" is listed first, but it
should be listed in alphabetical order, not first.
- The generated files are (hidden) in .tmpmedia/
- The link from the top-level index.html file to "media" is to
media/index.html, but the file is actually in .tmpmedia/media/index.html
- Please build docs with and without using "O=builddir" and test that.
- Would it be possible for media to have its own Makefile instead of
merging into this one?
Due to the way cleandocs target works, I had to rename the media DocBook
to media_api, otherwise cleandocs would remove the /media directory.
Thanks-to: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/DocBook/media/v4l/pixfmt-y41p.xml')
-rw-r--r-- | Documentation/DocBook/media/v4l/pixfmt-y41p.xml | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/pixfmt-y41p.xml b/Documentation/DocBook/media/v4l/pixfmt-y41p.xml new file mode 100644 index 000000000000..73c8536efb05 --- /dev/null +++ b/Documentation/DocBook/media/v4l/pixfmt-y41p.xml @@ -0,0 +1,157 @@ + <refentry id="V4L2-PIX-FMT-Y41P"> + <refmeta> + <refentrytitle>V4L2_PIX_FMT_Y41P ('Y41P')</refentrytitle> + &manvol; + </refmeta> + <refnamediv> + <refname><constant>V4L2_PIX_FMT_Y41P</constant></refname> + <refpurpose>Format with ¼ horizontal chroma +resolution, also known as YUV 4:1:1</refpurpose> + </refnamediv> + <refsect1> + <title>Description</title> + + <para>In this format each 12 bytes is eight pixels. In the +twelve bytes are two CbCr pairs and eight Y's. The first CbCr pair +goes with the first four Y's, and the second CbCr pair goes with the +other four Y's. The Cb and Cr components have one fourth the +horizontal resolution of the Y component.</para> + + <para>Do not confuse this format with <link +linkend="V4L2-PIX-FMT-YUV411P"><constant>V4L2_PIX_FMT_YUV411P</constant></link>. +Y41P is derived from "YUV 4:1:1 <emphasis>packed</emphasis>", while +YUV411P stands for "YUV 4:1:1 <emphasis>planar</emphasis>".</para> + + <example> + <title><constant>V4L2_PIX_FMT_Y41P</constant> 8 × 4 +pixel image</title> + + <formalpara> + <title>Byte Order</title> + <para>Each cell is one byte. + <informaltable frame="none"> + <tgroup cols="13" align="center"> + <colspec align="left" colwidth="2*" /> + <tbody valign="top"> + <row> + <entry>start + 0:</entry> + <entry>Cb<subscript>00</subscript></entry> + <entry>Y'<subscript>00</subscript></entry> + <entry>Cr<subscript>00</subscript></entry> + <entry>Y'<subscript>01</subscript></entry> + <entry>Cb<subscript>01</subscript></entry> + <entry>Y'<subscript>02</subscript></entry> + <entry>Cr<subscript>01</subscript></entry> + <entry>Y'<subscript>03</subscript></entry> + <entry>Y'<subscript>04</subscript></entry> + <entry>Y'<subscript>05</subscript></entry> + <entry>Y'<subscript>06</subscript></entry> + <entry>Y'<subscript>07</subscript></entry> + </row> + <row> + <entry>start + 12:</entry> + <entry>Cb<subscript>10</subscript></entry> + <entry>Y'<subscript>10</subscript></entry> + <entry>Cr<subscript>10</subscript></entry> + <entry>Y'<subscript>11</subscript></entry> + <entry>Cb<subscript>11</subscript></entry> + <entry>Y'<subscript>12</subscript></entry> + <entry>Cr<subscript>11</subscript></entry> + <entry>Y'<subscript>13</subscript></entry> + <entry>Y'<subscript>14</subscript></entry> + <entry>Y'<subscript>15</subscript></entry> + <entry>Y'<subscript>16</subscript></entry> + <entry>Y'<subscript>17</subscript></entry> + </row> + <row> + <entry>start + 24:</entry> + <entry>Cb<subscript>20</subscript></entry> + <entry>Y'<subscript>20</subscript></entry> + <entry>Cr<subscript>20</subscript></entry> + <entry>Y'<subscript>21</subscript></entry> + <entry>Cb<subscript>21</subscript></entry> + <entry>Y'<subscript>22</subscript></entry> + <entry>Cr<subscript>21</subscript></entry> + <entry>Y'<subscript>23</subscript></entry> + <entry>Y'<subscript>24</subscript></entry> + <entry>Y'<subscript>25</subscript></entry> + <entry>Y'<subscript>26</subscript></entry> + <entry>Y'<subscript>27</subscript></entry> + </row> + <row> + <entry>start + 36:</entry> + <entry>Cb<subscript>30</subscript></entry> + <entry>Y'<subscript>30</subscript></entry> + <entry>Cr<subscript>30</subscript></entry> + <entry>Y'<subscript>31</subscript></entry> + <entry>Cb<subscript>31</subscript></entry> + <entry>Y'<subscript>32</subscript></entry> + <entry>Cr<subscript>31</subscript></entry> + <entry>Y'<subscript>33</subscript></entry> + <entry>Y'<subscript>34</subscript></entry> + <entry>Y'<subscript>35</subscript></entry> + <entry>Y'<subscript>36</subscript></entry> + <entry>Y'<subscript>37</subscript></entry> + </row> + </tbody> + </tgroup> + </informaltable></para> + </formalpara> + + <formalpara> + <title>Color Sample Location.</title> + <para> + <informaltable frame="none"> + <tgroup cols="15" align="center"> + <tbody valign="top"> + <row> + <entry></entry> + <entry>0</entry><entry></entry><entry>1</entry><entry></entry> + <entry>2</entry><entry></entry><entry>3</entry><entry></entry> + <entry>4</entry><entry></entry><entry>5</entry><entry></entry> + <entry>6</entry><entry></entry><entry>7</entry> + </row> + <row> + <entry>0</entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry> + <entry>Y</entry><entry></entry><entry>Y</entry> + </row> + <row> + <entry>1</entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry> + <entry>Y</entry><entry></entry><entry>Y</entry> + </row> + <row> + <entry>2</entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry> + <entry>Y</entry><entry></entry><entry>Y</entry> + </row> + <row> + <entry>3</entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry> + <entry>Y</entry><entry></entry><entry>Y</entry> + </row> + </tbody> + </tgroup> + </informaltable> + </para> + </formalpara> + </example> + </refsect1> + </refentry> + + <!-- +Local Variables: +mode: sgml +sgml-parent-document: "pixfmt.sgml" +indent-tabs-mode: nil +End: + --> |