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| >Video for Linux Two API Specification: Revision 0.24</TH |
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| ><H1 |
| ><A |
| NAME="V4L2-PIX-FMT-YUV422P" |
| ></A |
| >V4L2_PIX_FMT_YUV422P ('422P')</H1 |
| ><DIV |
| CLASS="REFNAMEDIV" |
| ><A |
| NAME="AEN5158" |
| ></A |
| ><H2 |
| >Name</H2 |
| ><CODE |
| CLASS="CONSTANT" |
| >V4L2_PIX_FMT_YUV422P</CODE |
| > -- Format with ½ horizontal chroma resolution, |
| also known as YUV 4:2:2. Planar layout as opposed to |
| <CODE |
| CLASS="CONSTANT" |
| >V4L2_PIX_FMT_YUYV</CODE |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN5163" |
| ></A |
| ><H2 |
| >Description</H2 |
| ><P |
| >This format is not commonly used. This is a planar |
| version of the YUYV format. The three components are separated into |
| three sub-images or planes. The Y plane is first. The Y plane has one |
| byte per pixel. The Cb plane immediately follows the Y plane in |
| memory. The Cb plane is half the width of the Y plane (and of the |
| image). Each Cb belongs to two pixels. For example, |
| Cb<SUB |
| >0</SUB |
| > belongs to Y'<SUB |
| >00</SUB |
| >, |
| Y'<SUB |
| >01</SUB |
| >. Following the Cb plane is the Cr plane, |
| just like the Cb plane.</P |
| ><P |
| >If the Y plane has pad bytes after each row, then the Cr |
| and Cb planes have half as many pad bytes after their rows. In other |
| words, two Cx rows (including padding) is exactly as long as one Y row |
| (including padding).</P |
| ><DIV |
| CLASS="EXAMPLE" |
| ><A |
| NAME="AEN5170" |
| ></A |
| ><P |
| ><B |
| >Example 2-1. <CODE |
| CLASS="CONSTANT" |
| >V4L2_PIX_FMT_YUV422P</CODE |
| > 4 × 4 |
| pixel image</B |
| ></P |
| ><DIV |
| CLASS="FORMALPARA" |
| ><P |
| ><B |
| >Byte Order. </B |
| >Each cell is one byte. |
| <DIV |
| CLASS="INFORMALTABLE" |
| ><P |
| ></P |
| ><A |
| NAME="AEN5176" |
| ></A |
| ><TABLE |
| BORDER="0" |
| FRAME="void" |
| CLASS="CALSTABLE" |
| ><COL |
| WIDTH="2*" |
| ALIGN="LEFT"><COL><COL><COL><COL><TBODY |
| VALIGN="TOP" |
| ><TR |
| ><TD |
| >start + 0:</TD |
| ><TD |
| >Y'<SUB |
| >00</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >01</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >02</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >03</SUB |
| ></TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 4:</TD |
| ><TD |
| >Y'<SUB |
| >10</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >11</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >12</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >13</SUB |
| ></TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 8:</TD |
| ><TD |
| >Y'<SUB |
| >20</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >21</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >22</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >23</SUB |
| ></TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 12:</TD |
| ><TD |
| >Y'<SUB |
| >30</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >31</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >32</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >33</SUB |
| ></TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 16:</TD |
| ><TD |
| >Cb<SUB |
| >00</SUB |
| ></TD |
| ><TD |
| >Cb<SUB |
| >01</SUB |
| ></TD |
| ><TD |
| > </TD |
| ><TD |
| > </TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 18:</TD |
| ><TD |
| >Cb<SUB |
| >10</SUB |
| ></TD |
| ><TD |
| >Cb<SUB |
| >11</SUB |
| ></TD |
| ><TD |
| > </TD |
| ><TD |
| > </TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 20:</TD |
| ><TD |
| >Cb<SUB |
| >20</SUB |
| ></TD |
| ><TD |
| >Cb<SUB |
| >21</SUB |
| ></TD |
| ><TD |
| > </TD |
| ><TD |
| > </TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 22:</TD |
| ><TD |
| >Cb<SUB |
| >30</SUB |
| ></TD |
| ><TD |
| >Cb<SUB |
| >31</SUB |
| ></TD |
| ><TD |
| > </TD |
| ><TD |
| > </TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 24:</TD |
| ><TD |
| >Cr<SUB |
| >00</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >01</SUB |
| ></TD |
| ><TD |
| > </TD |
| ><TD |
| > </TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 26:</TD |
| ><TD |
| >Cr<SUB |
| >10</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >11</SUB |
| ></TD |
| ><TD |
| > </TD |
| ><TD |
| > </TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 28:</TD |
| ><TD |
| >Cr<SUB |
| >20</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >21</SUB |
| ></TD |
| ><TD |
| > </TD |
| ><TD |
| > </TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 30:</TD |
| ><TD |
| >Cr<SUB |
| >30</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >31</SUB |
| ></TD |
| ><TD |
| > </TD |
| ><TD |
| > </TD |
| ></TR |
| ></TBODY |
| ></TABLE |
| ><P |
| ></P |
| ></DIV |
| > |
| </P |
| ></DIV |
| ><DIV |
| CLASS="FORMALPARA" |
| ><P |
| ><B |
| >Color Sample Location. </B |
| > <DIV |
| CLASS="INFORMALTABLE" |
| ><P |
| ></P |
| ><A |
| NAME="AEN5271" |
| ></A |
| ><TABLE |
| BORDER="0" |
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| ><COL><COL><COL><COL><COL><COL><COL><TBODY |
| VALIGN="TOP" |
| ><TR |
| ><TD |
| > </TD |
| ><TD |
| >0</TD |
| ><TD |
| > </TD |
| ><TD |
| >1</TD |
| ><TD |
| > </TD |
| ><TD |
| >2</TD |
| ><TD |
| > </TD |
| ><TD |
| >3</TD |
| ></TR |
| ><TR |
| ><TD |
| >0</TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ></TR |
| ><TR |
| ><TD |
| >1</TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ></TR |
| ><TR |
| ><TD |
| >2</TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ></TR |
| ><TR |
| ><TD |
| >3</TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ></TR |
| ></TBODY |
| ></TABLE |
| ><P |
| ></P |
| ></DIV |
| > |
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