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Diffstat (limited to 'Documentation/DocBook/v4l/pixfmt-yuv410.xml')
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diff --git a/Documentation/DocBook/v4l/pixfmt-yuv410.xml b/Documentation/DocBook/v4l/pixfmt-yuv410.xml new file mode 100644 index 000000000000..8eb4a193d770 --- /dev/null +++ b/Documentation/DocBook/v4l/pixfmt-yuv410.xml | |||
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| 1 | <refentry> | ||
| 2 | <refmeta> | ||
| 3 | <refentrytitle>V4L2_PIX_FMT_YVU410 ('YVU9'), V4L2_PIX_FMT_YUV410 ('YUV9')</refentrytitle> | ||
| 4 | &manvol; | ||
| 5 | </refmeta> | ||
| 6 | <refnamediv> | ||
| 7 | <refname id="V4L2-PIX-FMT-YVU410"><constant>V4L2_PIX_FMT_YVU410</constant></refname> | ||
| 8 | <refname id="V4L2-PIX-FMT-YUV410"><constant>V4L2_PIX_FMT_YUV410</constant></refname> | ||
| 9 | <refpurpose>Planar formats with ¼ horizontal and | ||
| 10 | vertical chroma resolution, also known as YUV 4:1:0</refpurpose> | ||
| 11 | </refnamediv> | ||
| 12 | <refsect1> | ||
| 13 | <title>Description</title> | ||
| 14 | |||
| 15 | <para>These are planar formats, as opposed to a packed format. | ||
| 16 | The three components are separated into three sub-images or planes. | ||
| 17 | The Y plane is first. The Y plane has one byte per pixel. For | ||
| 18 | <constant>V4L2_PIX_FMT_YVU410</constant>, the Cr plane immediately | ||
| 19 | follows the Y plane in memory. The Cr plane is ¼ the width and | ||
| 20 | ¼ the height of the Y plane (and of the image). Each Cr belongs | ||
| 21 | to 16 pixels, a four-by-four square of the image. Following the Cr | ||
| 22 | plane is the Cb plane, just like the Cr plane. | ||
| 23 | <constant>V4L2_PIX_FMT_YUV410</constant> is the same, except the Cb | ||
| 24 | plane comes first, then the Cr plane.</para> | ||
| 25 | |||
| 26 | <para>If the Y plane has pad bytes after each row, then the Cr | ||
| 27 | and Cb planes have ¼ as many pad bytes after their rows. In | ||
| 28 | other words, four Cx rows (including padding) are exactly as long as | ||
| 29 | one Y row (including padding).</para> | ||
| 30 | |||
| 31 | <example> | ||
| 32 | <title><constant>V4L2_PIX_FMT_YVU410</constant> 4 × 4 | ||
| 33 | pixel image</title> | ||
| 34 | |||
| 35 | <formalpara> | ||
| 36 | <title>Byte Order.</title> | ||
| 37 | <para>Each cell is one byte. | ||
| 38 | <informaltable frame="none"> | ||
| 39 | <tgroup cols="5" align="center"> | ||
| 40 | <colspec align="left" colwidth="2*" /> | ||
| 41 | <tbody valign="top"> | ||
| 42 | <row> | ||
| 43 | <entry>start + 0:</entry> | ||
| 44 | <entry>Y'<subscript>00</subscript></entry> | ||
| 45 | <entry>Y'<subscript>01</subscript></entry> | ||
| 46 | <entry>Y'<subscript>02</subscript></entry> | ||
| 47 | <entry>Y'<subscript>03</subscript></entry> | ||
| 48 | </row> | ||
| 49 | <row> | ||
| 50 | <entry>start + 4:</entry> | ||
| 51 | <entry>Y'<subscript>10</subscript></entry> | ||
| 52 | <entry>Y'<subscript>11</subscript></entry> | ||
| 53 | <entry>Y'<subscript>12</subscript></entry> | ||
| 54 | <entry>Y'<subscript>13</subscript></entry> | ||
| 55 | </row> | ||
| 56 | <row> | ||
| 57 | <entry>start + 8:</entry> | ||
| 58 | <entry>Y'<subscript>20</subscript></entry> | ||
| 59 | <entry>Y'<subscript>21</subscript></entry> | ||
| 60 | <entry>Y'<subscript>22</subscript></entry> | ||
| 61 | <entry>Y'<subscript>23</subscript></entry> | ||
| 62 | </row> | ||
| 63 | <row> | ||
| 64 | <entry>start + 12:</entry> | ||
| 65 | <entry>Y'<subscript>30</subscript></entry> | ||
| 66 | <entry>Y'<subscript>31</subscript></entry> | ||
| 67 | <entry>Y'<subscript>32</subscript></entry> | ||
| 68 | <entry>Y'<subscript>33</subscript></entry> | ||
| 69 | </row> | ||
| 70 | <row> | ||
| 71 | <entry>start + 16:</entry> | ||
| 72 | <entry>Cr<subscript>00</subscript></entry> | ||
| 73 | </row> | ||
| 74 | <row> | ||
| 75 | <entry>start + 17:</entry> | ||
| 76 | <entry>Cb<subscript>00</subscript></entry> | ||
| 77 | </row> | ||
| 78 | </tbody> | ||
| 79 | </tgroup> | ||
| 80 | </informaltable> | ||
| 81 | </para> | ||
| 82 | </formalpara> | ||
| 83 | |||
| 84 | <formalpara> | ||
| 85 | <title>Color Sample Location.</title> | ||
| 86 | <para> | ||
| 87 | <informaltable frame="none"> | ||
| 88 | <tgroup cols="7" align="center"> | ||
| 89 | <tbody valign="top"> | ||
| 90 | <row> | ||
| 91 | <entry></entry> | ||
| 92 | <entry>0</entry><entry></entry><entry>1</entry><entry></entry> | ||
| 93 | <entry>2</entry><entry></entry><entry>3</entry> | ||
| 94 | </row> | ||
| 95 | <row> | ||
| 96 | <entry>0</entry> | ||
| 97 | <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> | ||
| 98 | <entry>Y</entry><entry></entry><entry>Y</entry> | ||
| 99 | </row> | ||
| 100 | <row> | ||
| 101 | <entry></entry> | ||
| 102 | </row> | ||
| 103 | <row> | ||
| 104 | <entry>1</entry> | ||
| 105 | <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> | ||
| 106 | <entry>Y</entry><entry></entry><entry>Y</entry> | ||
| 107 | </row> | ||
| 108 | <row> | ||
| 109 | <entry></entry> | ||
| 110 | <entry></entry><entry></entry><entry></entry><entry>C</entry> | ||
| 111 | <entry></entry><entry></entry><entry></entry> | ||
| 112 | </row> | ||
| 113 | <row> | ||
| 114 | <entry>2</entry> | ||
| 115 | <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> | ||
| 116 | <entry>Y</entry><entry></entry><entry>Y</entry> | ||
| 117 | </row> | ||
| 118 | <row> | ||
| 119 | <entry></entry> | ||
| 120 | </row> | ||
| 121 | <row> | ||
| 122 | <entry>3</entry> | ||
| 123 | <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> | ||
| 124 | <entry>Y</entry><entry></entry><entry>Y</entry> | ||
| 125 | </row> | ||
| 126 | </tbody> | ||
| 127 | </tgroup> | ||
| 128 | </informaltable> | ||
| 129 | </para> | ||
| 130 | </formalpara> | ||
| 131 | </example> | ||
| 132 | </refsect1> | ||
| 133 | </refentry> | ||
| 134 | |||
| 135 | <!-- | ||
| 136 | Local Variables: | ||
| 137 | mode: sgml | ||
| 138 | sgml-parent-document: "pixfmt.sgml" | ||
| 139 | indent-tabs-mode: nil | ||
| 140 | End: | ||
| 141 | --> | ||