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Commit d924de09 authored by Michael Jones's avatar Michael Jones Committed by Mauro Carvalho Chehab
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[media] v4l: add V4L2_PIX_FMT_Y12 format



Y12 is a grey-scale format with a depth of 12 bits per pixel stored in
16-bit words.

Signed-off-by: default avatarMichael Jones <michael.jones@matrix-vision.de>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 5a3ddcde
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@@ -294,6 +294,7 @@
<!ENTITY sub-srggb10 SYSTEM "v4l/pixfmt-srggb10.xml">
<!ENTITY sub-srggb8 SYSTEM "v4l/pixfmt-srggb8.xml">
<!ENTITY sub-y10 SYSTEM "v4l/pixfmt-y10.xml">
<!ENTITY sub-y12 SYSTEM "v4l/pixfmt-y12.xml">
<!ENTITY sub-pixfmt SYSTEM "v4l/pixfmt.xml">
<!ENTITY sub-cropcap SYSTEM "v4l/vidioc-cropcap.xml">
<!ENTITY sub-dbg-g-register SYSTEM "v4l/vidioc-dbg-g-register.xml">
+79 −0
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<refentry id="V4L2-PIX-FMT-Y12">
  <refmeta>
    <refentrytitle>V4L2_PIX_FMT_Y12 ('Y12 ')</refentrytitle>
    &manvol;
  </refmeta>
  <refnamediv>
    <refname><constant>V4L2_PIX_FMT_Y12</constant></refname>
    <refpurpose>Grey-scale image</refpurpose>
  </refnamediv>
  <refsect1>
    <title>Description</title>

    <para>This is a grey-scale image with a depth of 12 bits per pixel. Pixels
are stored in 16-bit words with unused high bits padded with 0. The least
significant byte is stored at lower memory addresses (little-endian).</para>

    <example>
      <title><constant>V4L2_PIX_FMT_Y12</constant> 4 &times; 4
pixel image</title>

      <formalpara>
	<title>Byte Order.</title>
	<para>Each cell is one byte.
	  <informaltable frame="none">
	    <tgroup cols="9" align="center">
	      <colspec align="left" colwidth="2*" />
	      <tbody valign="top">
		<row>
		  <entry>start&nbsp;+&nbsp;0:</entry>
		  <entry>Y'<subscript>00low</subscript></entry>
		  <entry>Y'<subscript>00high</subscript></entry>
		  <entry>Y'<subscript>01low</subscript></entry>
		  <entry>Y'<subscript>01high</subscript></entry>
		  <entry>Y'<subscript>02low</subscript></entry>
		  <entry>Y'<subscript>02high</subscript></entry>
		  <entry>Y'<subscript>03low</subscript></entry>
		  <entry>Y'<subscript>03high</subscript></entry>
		</row>
		<row>
		  <entry>start&nbsp;+&nbsp;8:</entry>
		  <entry>Y'<subscript>10low</subscript></entry>
		  <entry>Y'<subscript>10high</subscript></entry>
		  <entry>Y'<subscript>11low</subscript></entry>
		  <entry>Y'<subscript>11high</subscript></entry>
		  <entry>Y'<subscript>12low</subscript></entry>
		  <entry>Y'<subscript>12high</subscript></entry>
		  <entry>Y'<subscript>13low</subscript></entry>
		  <entry>Y'<subscript>13high</subscript></entry>
		</row>
		<row>
		  <entry>start&nbsp;+&nbsp;16:</entry>
		  <entry>Y'<subscript>20low</subscript></entry>
		  <entry>Y'<subscript>20high</subscript></entry>
		  <entry>Y'<subscript>21low</subscript></entry>
		  <entry>Y'<subscript>21high</subscript></entry>
		  <entry>Y'<subscript>22low</subscript></entry>
		  <entry>Y'<subscript>22high</subscript></entry>
		  <entry>Y'<subscript>23low</subscript></entry>
		  <entry>Y'<subscript>23high</subscript></entry>
		</row>
		<row>
		  <entry>start&nbsp;+&nbsp;24:</entry>
		  <entry>Y'<subscript>30low</subscript></entry>
		  <entry>Y'<subscript>30high</subscript></entry>
		  <entry>Y'<subscript>31low</subscript></entry>
		  <entry>Y'<subscript>31high</subscript></entry>
		  <entry>Y'<subscript>32low</subscript></entry>
		  <entry>Y'<subscript>32high</subscript></entry>
		  <entry>Y'<subscript>33low</subscript></entry>
		  <entry>Y'<subscript>33high</subscript></entry>
		</row>
	      </tbody>
	    </tgroup>
	  </informaltable>
	</para>
      </formalpara>
    </example>
  </refsect1>
</refentry>
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@@ -696,6 +696,7 @@ information.</para>
    &sub-packed-yuv;
    &sub-grey;
    &sub-y10;
    &sub-y12;
    &sub-y16;
    &sub-yuyv;
    &sub-uyvy;
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@@ -308,6 +308,7 @@ struct v4l2_pix_format {
#define V4L2_PIX_FMT_Y4      v4l2_fourcc('Y', '0', '4', ' ') /*  4  Greyscale     */
#define V4L2_PIX_FMT_Y6      v4l2_fourcc('Y', '0', '6', ' ') /*  6  Greyscale     */
#define V4L2_PIX_FMT_Y10     v4l2_fourcc('Y', '1', '0', ' ') /* 10  Greyscale     */
#define V4L2_PIX_FMT_Y12     v4l2_fourcc('Y', '1', '2', ' ') /* 12  Greyscale     */
#define V4L2_PIX_FMT_Y16     v4l2_fourcc('Y', '1', '6', ' ') /* 16  Greyscale     */

/* Palette formats */