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Commit d65fae92 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Mauro Carvalho Chehab
Browse files

[media] v4l: Add YUV 4:2:2 and YUV 4:4:4 tri-planar non-contiguous formats 



The formats use three planes through the multiplanar API, allowing for
non-contiguous planes in memory.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 96621112

Documentation/DocBook/media/v4l/pixfmt-yuv422m.xml

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+166 −0
Original line number Diff line number Diff line 
    <refentry>

      <refmeta>

	<refentrytitle>V4L2_PIX_FMT_YUV422M ('YM16'), V4L2_PIX_FMT_YVU422M ('YM61')</refentrytitle>

	&manvol;

      </refmeta>

      <refnamediv>

	<refname id="V4L2-PIX-FMT-YUV422M"><constant>V4L2_PIX_FMT_YUV422M</constant></refname>

	<refname id="V4L2-PIX-FMT-YVU422M"><constant>V4L2_PIX_FMT_YVU422M</constant></refname>

	<refpurpose>Planar formats with &frac12; horizontal resolution, also

	known as YUV and YVU 4:2:2</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.</para>



	<para>The Y plane is first. The Y plane has one byte per pixel.

For <constant>V4L2_PIX_FMT_YUV422M</constant> the Cb data

constitutes the second plane which is half the width of the Y plane (and of the

image). Each Cb belongs to two pixels. For example,

Cb<subscript>0</subscript> belongs to Y'<subscript>00</subscript>,

Y'<subscript>01</subscript>. The Cr data, just like the Cb plane, is

in the third plane. </para>



	<para><constant>V4L2_PIX_FMT_YVU422M</constant> is the same except

the Cr data is stored in the second plane and the Cb data in the third plane.

</para>



	<para>If the Y plane has pad bytes after each row, then the Cb

and Cr 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_YUV422M</constant> and

<constant>V4L2_PIX_FMT_YVU422M</constant> are 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_YUV422M</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>Cb<subscript>00</subscript></entry>

		      <entry>Cb<subscript>01</subscript></entry>

		    </row>

		    <row>

		      <entry>start1&nbsp;+&nbsp;2:</entry>

		      <entry>Cb<subscript>10</subscript></entry>

		      <entry>Cb<subscript>11</subscript></entry>

		    </row>

		    <row>

		      <entry>start1&nbsp;+&nbsp;4:</entry>

		      <entry>Cb<subscript>20</subscript></entry>

		      <entry>Cb<subscript>21</subscript></entry>

		    </row>

		    <row>

		      <entry>start1&nbsp;+&nbsp;6:</entry>

		      <entry>Cb<subscript>30</subscript></entry>

		      <entry>Cb<subscript>31</subscript></entry>

		    </row>

		    <row><entry></entry></row>

		    <row>

		      <entry>start2&nbsp;+&nbsp;0:</entry>

		      <entry>Cr<subscript>00</subscript></entry>

		      <entry>Cr<subscript>01</subscript></entry>

		    </row>

		    <row>

		      <entry>start2&nbsp;+&nbsp;2:</entry>

		      <entry>Cr<subscript>10</subscript></entry>

		      <entry>Cr<subscript>11</subscript></entry>

		    </row>

		    <row>

		      <entry>start2&nbsp;+&nbsp;4:</entry>

		      <entry>Cr<subscript>20</subscript></entry>

		      <entry>Cr<subscript>21</subscript></entry>

		    </row>

		    <row>

		      <entry>start2&nbsp;+&nbsp;6:</entry>

		      <entry>Cr<subscript>30</subscript></entry>

		      <entry>Cr<subscript>31</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>C</entry><entry>Y</entry><entry></entry>

		      <entry>Y</entry><entry>C</entry><entry>Y</entry>

		    </row>

		    <row>

		      <entry>1</entry>

		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>

		      <entry>Y</entry><entry>C</entry><entry>Y</entry>

		    </row>

		    <row>

		      <entry>2</entry>

		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>

		      <entry>Y</entry><entry>C</entry><entry>Y</entry>

		    </row>

		    <row>

		      <entry>3</entry>

		      <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>

		      <entry>Y</entry><entry>C</entry><entry>Y</entry>

		    </row>

		  </tbody>

		</tgroup>

		</informaltable>

	      </para>

	  </formalpara>

	</example>

      </refsect1>

    </refentry>

Documentation/DocBook/media/v4l/pixfmt-yuv444m.xml

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    <refentry>

      <refmeta>

	<refentrytitle>V4L2_PIX_FMT_YUV444M ('YM24'), V4L2_PIX_FMT_YVU444M ('YM42')</refentrytitle>

	&manvol;

      </refmeta>

      <refnamediv>

	<refname id="V4L2-PIX-FMT-YUV444M"><constant>V4L2_PIX_FMT_YUV444M</constant></refname>

	<refname id="V4L2-PIX-FMT-YVU444M"><constant>V4L2_PIX_FMT_YVU444M</constant></refname>

	<refpurpose>Planar formats with full horizontal resolution, also

	known as YUV and YVU 4:4:4</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.</para>



	<para>The Y plane is first. The Y plane has one byte per pixel.

For <constant>V4L2_PIX_FMT_YUV444M</constant> the Cb data

constitutes the second plane which is the same width and height as the Y plane

(and as the image). The Cr data, just like the Cb plane, is in the third plane.

</para>



	<para><constant>V4L2_PIX_FMT_YVU444M</constant> is the same except

the Cr data is stored in the second plane and the Cb data in the third plane.

</para>

	<para>If the Y plane has pad bytes after each row, then the Cb

and Cr planes have the same number of pad bytes after their rows.</para>



	<para><constant>V4L2_PIX_FMT_YUV444M</constant> and

<constant>V4L2_PIX_FMT_YUV444M</constant> are 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_YUV444M</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>Cb<subscript>00</subscript></entry>

		      <entry>Cb<subscript>01</subscript></entry>

		      <entry>Cb<subscript>02</subscript></entry>

		      <entry>Cb<subscript>03</subscript></entry>

		    </row>

		    <row>

		      <entry>start1&nbsp;+&nbsp;4:</entry>

		      <entry>Cb<subscript>10</subscript></entry>

		      <entry>Cb<subscript>11</subscript></entry>

		      <entry>Cb<subscript>12</subscript></entry>

		      <entry>Cb<subscript>13</subscript></entry>

		    </row>

		    <row>

		      <entry>start1&nbsp;+&nbsp;8:</entry>

		      <entry>Cb<subscript>20</subscript></entry>

		      <entry>Cb<subscript>21</subscript></entry>

		      <entry>Cb<subscript>22</subscript></entry>

		      <entry>Cb<subscript>23</subscript></entry>

		    </row>

		    <row>

		      <entry>start1&nbsp;+&nbsp;12:</entry>

		      <entry>Cb<subscript>20</subscript></entry>

		      <entry>Cb<subscript>21</subscript></entry>

		      <entry>Cb<subscript>32</subscript></entry>

		      <entry>Cb<subscript>33</subscript></entry>

		    </row>

		    <row><entry></entry></row>

		    <row>

		      <entry>start2&nbsp;+&nbsp;0:</entry>

		      <entry>Cr<subscript>00</subscript></entry>

		      <entry>Cr<subscript>01</subscript></entry>

		      <entry>Cr<subscript>02</subscript></entry>

		      <entry>Cr<subscript>03</subscript></entry>

		    </row>

		    <row>

		      <entry>start2&nbsp;+&nbsp;4:</entry>

		      <entry>Cr<subscript>10</subscript></entry>

		      <entry>Cr<subscript>11</subscript></entry>

		      <entry>Cr<subscript>12</subscript></entry>

		      <entry>Cr<subscript>13</subscript></entry>

		    </row>

		    <row>

		      <entry>start2&nbsp;+&nbsp;8:</entry>

		      <entry>Cr<subscript>20</subscript></entry>

		      <entry>Cr<subscript>21</subscript></entry>

		      <entry>Cr<subscript>22</subscript></entry>

		      <entry>Cr<subscript>23</subscript></entry>

		    </row>

		    <row>

		      <entry>start2&nbsp;+&nbsp;12:</entry>

		      <entry>Cr<subscript>30</subscript></entry>

		      <entry>Cr<subscript>31</subscript></entry>

		      <entry>Cr<subscript>32</subscript></entry>

		      <entry>Cr<subscript>33</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>YC</entry><entry></entry><entry>YC</entry><entry></entry>

		      <entry>YC</entry><entry></entry><entry>YC</entry>

		    </row>

		    <row>

		      <entry>1</entry>

		      <entry>YC</entry><entry></entry><entry>YC</entry><entry></entry>

		      <entry>YC</entry><entry></entry><entry>YC</entry>

		    </row>

		    <row>

		      <entry>2</entry>

		      <entry>YC</entry><entry></entry><entry>YC</entry><entry></entry>

		      <entry>YC</entry><entry></entry><entry>YC</entry>

		    </row>

		    <row>

		      <entry>3</entry>

		      <entry>YC</entry><entry></entry><entry>YC</entry><entry></entry>

		      <entry>YC</entry><entry></entry><entry>YC</entry>

		    </row>

		  </tbody>

		</tgroup>

		</informaltable>

	      </para>

	  </formalpara>

	</example>

      </refsect1>

    </refentry>

Documentation/DocBook/media/v4l/pixfmt.xml

+2 −0
Original line number Diff line number Diff line
@@ -1628,6 +1628,8 @@ information.</para> 
    &sub-y41p;

    &sub-yuv420;

    &sub-yuv420m;

    &sub-yuv422m;

    &sub-yuv444m;

    &sub-yuv410;

    &sub-yuv422p;

    &sub-yuv411p;

drivers/media/v4l2-core/v4l2-ioctl.c

+4 −0
Original line number Diff line number Diff line
@@ -1191,6 +1191,10 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 
	case V4L2_PIX_FMT_NV12MT_16X16:	descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;

	case V4L2_PIX_FMT_YUV420M:	descr = "Planar YUV 4:2:0 (N-C)"; break;

	case V4L2_PIX_FMT_YVU420M:	descr = "Planar YVU 4:2:0 (N-C)"; break;

	case V4L2_PIX_FMT_YUV422M:	descr = "Planar YUV 4:2:2 (N-C)"; break;

	case V4L2_PIX_FMT_YVU422M:	descr = "Planar YVU 4:2:2 (N-C)"; break;

	case V4L2_PIX_FMT_YUV444M:	descr = "Planar YUV 4:4:4 (N-C)"; break;

	case V4L2_PIX_FMT_YVU444M:	descr = "Planar YVU 4:4:4 (N-C)"; break;

	case V4L2_PIX_FMT_SBGGR8:	descr = "8-bit Bayer BGBG/GRGR"; break;

	case V4L2_PIX_FMT_SGBRG8:	descr = "8-bit Bayer GBGB/RGRG"; break;

	case V4L2_PIX_FMT_SGRBG8:	descr = "8-bit Bayer GRGR/BGBG"; break;

include/uapi/linux/videodev2.h

+4 −0
Original line number Diff line number Diff line
@@ -546,6 +546,10 @@ 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 */

#define V4L2_PIX_FMT_YUV422M v4l2_fourcc('Y', 'M', '1', '6') /* 16  YUV422 planar */

#define V4L2_PIX_FMT_YVU422M v4l2_fourcc('Y', 'M', '6', '1') /* 16  YVU422 planar */

#define V4L2_PIX_FMT_YUV444M v4l2_fourcc('Y', 'M', '2', '4') /* 24  YUV444 planar */

#define V4L2_PIX_FMT_YVU444M v4l2_fourcc('Y', 'M', '4', '2') /* 24  YVU444 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.. */