[media] v4l: add V4L2_PIX_FMT_Y12 format
Michael Jones [Tue, 29 Mar 2011 08:19:06 +0000 (05:19 -0300)]
Y12 is a grey-scale format with a depth of 12 bits per pixel stored in
16-bit words.

Signed-off-by: Michael Jones <michael.jones@matrix-vision.de>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Documentation/DocBook/media-entities.tmpl
Documentation/DocBook/v4l/pixfmt-y12.xml [new file with mode: 0644]
Documentation/DocBook/v4l/pixfmt.xml
include/linux/videodev2.h

index 5d259c6..fea63b4 100644 (file)
 <!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">
diff --git a/Documentation/DocBook/v4l/pixfmt-y12.xml b/Documentation/DocBook/v4l/pixfmt-y12.xml
new file mode 100644 (file)
index 0000000..ff417b8
--- /dev/null
@@ -0,0 +1,79 @@
+<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>
index c6fdcbb..40af4be 100644 (file)
@@ -696,6 +696,7 @@ information.</para>
     &sub-packed-yuv;
     &sub-grey;
     &sub-y10;
+    &sub-y12;
     &sub-y16;
     &sub-yuyv;
     &sub-uyvy;
index aa6c393..be82c8e 100644 (file)
@@ -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 */