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| >Video for Linux Two API Specification: Revision 0.24</TH |
| ></TR |
| ><TR |
| ><TD |
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| WIDTH="100%"></DIV |
| ><H1 |
| ><A |
| NAME="V4L2-PIX-FMT-Y41P" |
| ></A |
| >V4L2_PIX_FMT_Y41P ('Y41P')</H1 |
| ><DIV |
| CLASS="REFNAMEDIV" |
| ><A |
| NAME="AEN4633" |
| ></A |
| ><H2 |
| >Name</H2 |
| ><CODE |
| CLASS="CONSTANT" |
| >V4L2_PIX_FMT_Y41P</CODE |
| > -- Format with ¼ horizontal chroma |
| resolution, also known as YUV 4:1:1</DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN4637" |
| ></A |
| ><H2 |
| >Description</H2 |
| ><P |
| >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.</P |
| ><P |
| >Do not confuse this format with <A |
| HREF="r5319.htm" |
| ><CODE |
| CLASS="CONSTANT" |
| >V4L2_PIX_FMT_YUV411P</CODE |
| ></A |
| >. |
| Y41P is derived from "YUV 4:1:1 <SPAN |
| CLASS="emphasis" |
| ><I |
| CLASS="EMPHASIS" |
| >packed</I |
| ></SPAN |
| >", while |
| YUV411P stands for "YUV 4:1:1 <SPAN |
| CLASS="emphasis" |
| ><I |
| CLASS="EMPHASIS" |
| >planar</I |
| ></SPAN |
| >".</P |
| ><DIV |
| CLASS="EXAMPLE" |
| ><A |
| NAME="AEN4645" |
| ></A |
| ><P |
| ><B |
| >Example 2-1. <CODE |
| CLASS="CONSTANT" |
| >V4L2_PIX_FMT_Y41P</CODE |
| > 8 × 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="AEN4651" |
| ></A |
| ><TABLE |
| BORDER="0" |
| FRAME="void" |
| CLASS="CALSTABLE" |
| ><COL |
| WIDTH="2*" |
| ALIGN="LEFT"><COL><COL><COL><COL><COL><COL><COL><COL><COL><COL><COL><COL><TBODY |
| VALIGN="TOP" |
| ><TR |
| ><TD |
| >start + 0:</TD |
| ><TD |
| >Cb<SUB |
| >00</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >00</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >00</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >01</SUB |
| ></TD |
| ><TD |
| >Cb<SUB |
| >01</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >02</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >01</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >03</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >04</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >05</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >06</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >07</SUB |
| ></TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 12:</TD |
| ><TD |
| >Cb<SUB |
| >10</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >10</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >10</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >11</SUB |
| ></TD |
| ><TD |
| >Cb<SUB |
| >11</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >12</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >11</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >13</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >14</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >15</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >16</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >17</SUB |
| ></TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 24:</TD |
| ><TD |
| >Cb<SUB |
| >20</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >20</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >20</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >21</SUB |
| ></TD |
| ><TD |
| >Cb<SUB |
| >21</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >22</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >21</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >23</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >24</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >25</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >26</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >27</SUB |
| ></TD |
| ></TR |
| ><TR |
| ><TD |
| >start + 36:</TD |
| ><TD |
| >Cb<SUB |
| >30</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >30</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >30</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >31</SUB |
| ></TD |
| ><TD |
| >Cb<SUB |
| >31</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >32</SUB |
| ></TD |
| ><TD |
| >Cr<SUB |
| >31</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >33</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >34</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >35</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >36</SUB |
| ></TD |
| ><TD |
| >Y'<SUB |
| >37</SUB |
| ></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="AEN4762" |
| ></A |
| ><TABLE |
| BORDER="0" |
| FRAME="void" |
| CLASS="CALSTABLE" |
| ><COL><COL><COL><COL><COL><COL><COL><COL><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 |
| ><TD |
| > </TD |
| ><TD |
| >4</TD |
| ><TD |
| > </TD |
| ><TD |
| >5</TD |
| ><TD |
| > </TD |
| ><TD |
| >6</TD |
| ><TD |
| > </TD |
| ><TD |
| >7</TD |
| ></TR |
| ><TR |
| ><TD |
| >0</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ></TR |
| ><TR |
| ><TD |
| >1</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ></TR |
| ><TR |
| ><TD |
| >2</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ></TR |
| ><TR |
| ><TD |
| >3</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ><TD |
| >C</TD |
| ><TD |
| >Y</TD |
| ><TD |
| > </TD |
| ><TD |
| >Y</TD |
| ></TR |
| ></TBODY |
| ></TABLE |
| ><P |
| ></P |
| ></DIV |
| > |
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