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Commit 84930548 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Mauro Carvalho Chehab
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[media] v4l: Add V4L2_PIX_FMT_NV16M and V4L2_PIX_FMT_NV61M formats 



NV16M and NV61M are planar YCbCr 4:2:2 and YCrCb 4:2:2 formats with a
luma plane followed by an interleaved chroma plane. The planes are not
required to be contiguous in memory, and the formats can only be used
with the multi-planar formats API.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: default avatarSakari Ailus <sakari.ailus@iki.fi>
Acked-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent f57fa210

Documentation/DocBook/media/v4l/pixfmt-nv16m.xml

0 → 100644
+171 −0
Original line number Original line Diff line number Diff line 
    <refentry>

      <refmeta>

	<refentrytitle>V4L2_PIX_FMT_NV16M ('NM16'), V4L2_PIX_FMT_NV61M ('NM61')</refentrytitle>

	&manvol;

      </refmeta>

      <refnamediv>

	<refname id="V4L2-PIX-FMT-NV16M"><constant>V4L2_PIX_FMT_NV16M</constant></refname>

	<refname id="V4L2-PIX-FMT-NV61M"><constant>V4L2_PIX_FMT_NV61M</constant></refname>

	<refpurpose>Variation of <constant>V4L2_PIX_FMT_NV16</constant> and <constant>V4L2_PIX_FMT_NV61</constant> with planes

	  non contiguous in memory. </refpurpose>

      </refnamediv>

      <refsect1>

	<title>Description</title>



	<para>This is a multi-planar, two-plane version of the YUV 4:2:0 format.

The three components are separated into two sub-images or planes.

<constant>V4L2_PIX_FMT_NV16M</constant> differs from <constant>V4L2_PIX_FMT_NV16

</constant> in that the two planes are non-contiguous in memory, i.e. the chroma

plane does not necessarily immediately follows the luma plane.

The luminance data occupies the first plane. The Y plane has one byte per pixel.

In the second plane there is chrominance data with alternating chroma samples.

The CbCr plane is the same width and height, in bytes, as the Y plane.

Each CbCr pair belongs to four pixels. For example,

Cb<subscript>0</subscript>/Cr<subscript>0</subscript> belongs to

Y'<subscript>00</subscript>, Y'<subscript>01</subscript>,

Y'<subscript>10</subscript>, Y'<subscript>11</subscript>.

<constant>V4L2_PIX_FMT_NV61M</constant> is the same as <constant>V4L2_PIX_FMT_NV16M</constant>

except the Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte.</para>



	<para><constant>V4L2_PIX_FMT_NV16M</constant> and

<constant>V4L2_PIX_FMT_NV61M</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_NV16M</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>Cr<subscript>00</subscript></entry>

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

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

		    </row>

		    <row>

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

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

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

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

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

		    </row>

		    <row>

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

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

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

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

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

		    </row>

		    <row>

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

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

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

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

		      <entry>Cr<subscript>32</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>

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

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

		    <row>

		      <entry></entry>

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

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

		    </row>

		  </tbody>

		</tgroup>

		</informaltable>

	      </para>

	  </formalpara>

	</example>

      </refsect1>

    </refentry>

Documentation/DocBook/media/v4l/pixfmt.xml

+1 −0
Original line number Original line Diff line number Diff line
@@ -718,6 +718,7 @@ information.</para> 
    &sub-nv12m;

    &sub-nv12m;

    &sub-nv12mt;

    &sub-nv12mt;

    &sub-nv16;

    &sub-nv16;

    &sub-nv16m;

    &sub-nv24;

    &sub-nv24;

    &sub-m420;

    &sub-m420;

  </section>

  </section>

include/uapi/linux/videodev2.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -348,6 +348,8 @@ struct v4l2_pix_format { 
/* two non contiguous planes - one Y, one Cr + Cb interleaved  */

/* two non contiguous planes - one Y, one Cr + Cb interleaved  */

#define V4L2_PIX_FMT_NV12M   v4l2_fourcc('N', 'M', '1', '2') /* 12  Y/CbCr 4:2:0  */

#define V4L2_PIX_FMT_NV12M   v4l2_fourcc('N', 'M', '1', '2') /* 12  Y/CbCr 4:2:0  */

#define V4L2_PIX_FMT_NV21M   v4l2_fourcc('N', 'M', '2', '1') /* 21  Y/CrCb 4:2:0  */

#define V4L2_PIX_FMT_NV21M   v4l2_fourcc('N', 'M', '2', '1') /* 21  Y/CrCb 4:2:0  */

#define V4L2_PIX_FMT_NV16M   v4l2_fourcc('N', 'M', '1', '6') /* 16  Y/CbCr 4:2:2  */

#define V4L2_PIX_FMT_NV61M   v4l2_fourcc('N', 'M', '6', '1') /* 16  Y/CrCb 4:2:2  */

#define V4L2_PIX_FMT_NV12MT  v4l2_fourcc('T', 'M', '1', '2') /* 12  Y/CbCr 4:2:0 64x32 macroblocks */

#define V4L2_PIX_FMT_NV12MT  v4l2_fourcc('T', 'M', '1', '2') /* 12  Y/CbCr 4:2:0 64x32 macroblocks */

#define V4L2_PIX_FMT_NV12MT_16X16 v4l2_fourcc('V', 'M', '1', '2') /* 12  Y/CbCr 4:2:0 16x16 macroblocks */

#define V4L2_PIX_FMT_NV12MT_16X16 v4l2_fourcc('V', 'M', '1', '2') /* 12  Y/CbCr 4:2:0 16x16 macroblocks */