mirror of https://gitee.com/openkylin/linux.git
91 lines
3.4 KiB
XML
91 lines
3.4 KiB
XML
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<refentry>
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<refmeta>
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<refentrytitle>V4L2_PIX_FMT_SRGGB12 ('RG12'),
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V4L2_PIX_FMT_SGRBG12 ('BA12'),
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V4L2_PIX_FMT_SGBRG12 ('GB12'),
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V4L2_PIX_FMT_SBGGR12 ('BG12'),
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</refentrytitle>
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&manvol;
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</refmeta>
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<refnamediv>
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<refname id="V4L2-PIX-FMT-SRGGB12"><constant>V4L2_PIX_FMT_SRGGB12</constant></refname>
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<refname id="V4L2-PIX-FMT-SGRBG12"><constant>V4L2_PIX_FMT_SGRBG12</constant></refname>
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<refname id="V4L2-PIX-FMT-SGBRG12"><constant>V4L2_PIX_FMT_SGBRG12</constant></refname>
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<refname id="V4L2-PIX-FMT-SBGGR12"><constant>V4L2_PIX_FMT_SBGGR12</constant></refname>
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<refpurpose>12-bit Bayer formats expanded to 16 bits</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<para>The following four pixel formats are raw sRGB / Bayer formats with
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12 bits per colour. Each colour component is stored in a 16-bit word, with 6
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unused high bits filled with zeros. Each n-pixel row contains n/2 green samples
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and n/2 blue or red samples, with alternating red and blue rows. Bytes are
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stored in memory in little endian order. They are conventionally described
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as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example of one of these
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formats</para>
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<example>
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<title><constant>V4L2_PIX_FMT_SBGGR12</constant> 4 × 4
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pixel image</title>
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<formalpara>
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<title>Byte Order.</title>
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<para>Each cell is one byte, high 6 bits in high bytes are 0.
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<informaltable frame="none">
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<tgroup cols="5" align="center">
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<colspec align="left" colwidth="2*" />
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<tbody valign="top">
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<row>
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<entry>start + 0:</entry>
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<entry>B<subscript>00low</subscript></entry>
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<entry>B<subscript>00high</subscript></entry>
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<entry>G<subscript>01low</subscript></entry>
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<entry>G<subscript>01high</subscript></entry>
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<entry>B<subscript>02low</subscript></entry>
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<entry>B<subscript>02high</subscript></entry>
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<entry>G<subscript>03low</subscript></entry>
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<entry>G<subscript>03high</subscript></entry>
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</row>
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<row>
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<entry>start + 8:</entry>
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<entry>G<subscript>10low</subscript></entry>
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<entry>G<subscript>10high</subscript></entry>
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<entry>R<subscript>11low</subscript></entry>
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<entry>R<subscript>11high</subscript></entry>
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<entry>G<subscript>12low</subscript></entry>
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<entry>G<subscript>12high</subscript></entry>
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<entry>R<subscript>13low</subscript></entry>
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<entry>R<subscript>13high</subscript></entry>
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</row>
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<row>
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<entry>start + 16:</entry>
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<entry>B<subscript>20low</subscript></entry>
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<entry>B<subscript>20high</subscript></entry>
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<entry>G<subscript>21low</subscript></entry>
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<entry>G<subscript>21high</subscript></entry>
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<entry>B<subscript>22low</subscript></entry>
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<entry>B<subscript>22high</subscript></entry>
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<entry>G<subscript>23low</subscript></entry>
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<entry>G<subscript>23high</subscript></entry>
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</row>
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<row>
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<entry>start + 24:</entry>
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<entry>G<subscript>30low</subscript></entry>
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<entry>G<subscript>30high</subscript></entry>
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<entry>R<subscript>31low</subscript></entry>
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<entry>R<subscript>31high</subscript></entry>
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<entry>G<subscript>32low</subscript></entry>
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<entry>G<subscript>32high</subscript></entry>
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<entry>R<subscript>33low</subscript></entry>
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<entry>R<subscript>33high</subscript></entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</para>
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</formalpara>
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</example>
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</refsect1>
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</refentry>
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