[media] v4l: Add new YVU420 multi planar fourcc definition

This patch adds new 'YM21' fourcc definition for multiplanar YCrCb
pixel format - V4L2_PIX_FMT_YVU420M.

Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml b/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml
new file mode 100644 (file)
index 0000000..2330667
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml
@@ -0,0 +1,154 @@
+    <refentry id="V4L2-PIX-FMT-YVU420M">
+      <refmeta>
+       <refentrytitle>V4L2_PIX_FMT_YVU420M ('YM21')</refentrytitle>
+       &manvol;
+      </refmeta>
+      <refnamediv>
+       <refname> <constant>V4L2_PIX_FMT_YVU420M</constant></refname>
+       <refpurpose>Variation of <constant>V4L2_PIX_FMT_YVU420</constant>
+         with planes non contiguous in memory. </refpurpose>
+      </refnamediv>
+
+      <refsect1>
+       <title>Description</title>
+
+       <para>This is a multi-planar format, as opposed to a packed format.
+The three components are separated into three sub-images or planes.
+
+The Y plane is first. The Y plane has one byte per pixel. The Cr data
+constitutes the second plane which is half the width and half
+the height of the Y plane (and of the image). Each Cr belongs to four
+pixels, a two-by-two square of the image. For example,
+Cr<subscript>0</subscript> belongs to Y'<subscript>00</subscript>,
+Y'<subscript>01</subscript>, Y'<subscript>10</subscript>, and
+Y'<subscript>11</subscript>. The Cb data, just like the Cr plane, constitutes
+the third plane. </para>
+
+       <para>If the Y plane has pad bytes after each row, then the Cr
+and Cb planes have half as many pad bytes after their rows. In other
+words, two Cx rows (including padding) is exactly as long as one Y row
+(including padding).</para>
+
+       <para><constant>V4L2_PIX_FMT_YVU420M</constant> is intended to be
+used only in drivers and applications that support the multi-planar API,
+described in <xref linkend="planar-apis"/>. </para>
+
+       <example>
+         <title><constant>V4L2_PIX_FMT_YVU420M</constant> 4 &times; 4
+pixel image</title>
+
+         <formalpara>
+           <title>Byte Order.</title>
+           <para>Each cell is one byte.
+               <informaltable frame="none">
+               <tgroup cols="5" align="center">
+                 <colspec align="left" colwidth="2*" />
+                 <tbody valign="top">
+                   <row>
+                     <entry>start0&nbsp;+&nbsp;0:</entry>
+                     <entry>Y'<subscript>00</subscript></entry>
+                     <entry>Y'<subscript>01</subscript></entry>
+                     <entry>Y'<subscript>02</subscript></entry>
+                     <entry>Y'<subscript>03</subscript></entry>
+                   </row>
+                   <row>
+                     <entry>start0&nbsp;+&nbsp;4:</entry>
+                     <entry>Y'<subscript>10</subscript></entry>
+                     <entry>Y'<subscript>11</subscript></entry>
+                     <entry>Y'<subscript>12</subscript></entry>
+                     <entry>Y'<subscript>13</subscript></entry>
+                   </row>
+                   <row>
+                     <entry>start0&nbsp;+&nbsp;8:</entry>
+                     <entry>Y'<subscript>20</subscript></entry>
+                     <entry>Y'<subscript>21</subscript></entry>
+                     <entry>Y'<subscript>22</subscript></entry>
+                     <entry>Y'<subscript>23</subscript></entry>
+                   </row>
+                   <row>
+                     <entry>start0&nbsp;+&nbsp;12:</entry>
+                     <entry>Y'<subscript>30</subscript></entry>
+                     <entry>Y'<subscript>31</subscript></entry>
+                     <entry>Y'<subscript>32</subscript></entry>
+                     <entry>Y'<subscript>33</subscript></entry>
+                   </row>
+                   <row><entry></entry></row>
+                   <row>
+                     <entry>start1&nbsp;+&nbsp;0:</entry>
+                     <entry>Cr<subscript>00</subscript></entry>
+                     <entry>Cr<subscript>01</subscript></entry>
+                   </row>
+                   <row>
+                     <entry>start1&nbsp;+&nbsp;2:</entry>
+                     <entry>Cr<subscript>10</subscript></entry>
+                     <entry>Cr<subscript>11</subscript></entry>
+                   </row>
+                   <row><entry></entry></row>
+                   <row>
+                     <entry>start2&nbsp;+&nbsp;0:</entry>
+                     <entry>Cb<subscript>00</subscript></entry>
+                     <entry>Cb<subscript>01</subscript></entry>
+                   </row>
+                   <row>
+                     <entry>start2&nbsp;+&nbsp;2:</entry>
+                     <entry>Cb<subscript>10</subscript></entry>
+                     <entry>Cb<subscript>11</subscript></entry>
+                   </row>
+                 </tbody>
+               </tgroup>
+               </informaltable>
+             </para>
+         </formalpara>
+
+         <formalpara>
+           <title>Color Sample Location.</title>
+           <para>
+               <informaltable frame="none">
+               <tgroup cols="7" align="center">
+                 <tbody valign="top">
+                   <row>
+                     <entry></entry>
+                     <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+                     <entry>2</entry><entry></entry><entry>3</entry>
+                   </row>
+                   <row>
+                     <entry>0</entry>
+                     <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+                     <entry>Y</entry><entry></entry><entry>Y</entry>
+                   </row>
+                   <row>
+                     <entry></entry>
+                     <entry></entry><entry>C</entry><entry></entry><entry></entry>
+                     <entry></entry><entry>C</entry><entry></entry>
+                   </row>
+                   <row>
+                     <entry>1</entry>
+                     <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+                     <entry>Y</entry><entry></entry><entry>Y</entry>
+                   </row>
+                   <row>
+                     <entry></entry>
+                   </row>
+                   <row>
+                     <entry>2</entry>
+                     <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+                     <entry>Y</entry><entry></entry><entry>Y</entry>
+                   </row>
+                   <row>
+                     <entry></entry>
+                     <entry></entry><entry>C</entry><entry></entry><entry></entry>
+                     <entry></entry><entry>C</entry><entry></entry>
+                   </row>
+                   <row>
+                     <entry>3</entry>
+                     <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+                     <entry>Y</entry><entry></entry><entry>Y</entry>
+                   </row>
+                 </tbody>
+               </tgroup>
+               </informaltable>
+             </para>
+         </formalpara>
+       </example>
+      </refsect1>
+    </refentry>

diff --git a/Documentation/DocBook/media/v4l/pixfmt.xml b/Documentation/DocBook/media/v4l/pixfmt.xml
index e58934c92895f159fc3200946a0d75ed50434e84..1ddbfabe31953b34fa8f51a8dc7c515daca39a06 100644 (file)
--- a/Documentation/DocBook/media/v4l/pixfmt.xml
+++ b/Documentation/DocBook/media/v4l/pixfmt.xml
@@ -708,6 +708,7 @@ information.</para>
     &sub-y41p;
     &sub-yuv420;
     &sub-yuv420m;
+    &sub-yvu420m;
     &sub-yuv410;
     &sub-yuv422p;
     &sub-yuv411p;

diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 91939a7a896e0d514364cf7219b2ebf798cdd39f..4862165e195ea6f0bf519d2dc6a5116ce5ca0662 100644 (file)
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -368,6 +368,7 @@ struct v4l2_pix_format {
 
 /* three non contiguous planes - Y, Cb, Cr */
 #define V4L2_PIX_FMT_YUV420M v4l2_fourcc('Y', 'M', '1', '2') /* 12  YUV420 planar */
+#define V4L2_PIX_FMT_YVU420M v4l2_fourcc('Y', 'M', '2', '1') /* 12  YVU420 planar */
 
 /* Bayer formats - see http://www.siliconimaging.com/RGB%20Bayer.htm */
 #define V4L2_PIX_FMT_SBGGR8  v4l2_fourcc('B', 'A', '8', '1') /*  8  BGBG.. GRGR.. */