From: Andy Walls <awalls@radix.net>
To: "Daniel Glöckner" <dg@emlix.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>,
linux-media@vger.kernel.org
Subject: Re: [patch] add documentation for planar YUV 4:4:4 format
Date: Thu, 26 Mar 2009 18:32:13 -0400 [thread overview]
Message-ID: <1238106733.3319.2.camel@palomino.walls.org> (raw)
In-Reply-To: <20090326150538.GB28126@emlix.com>
On Thu, 2009-03-26 at 16:05 +0100, Daniel Glöckner wrote:
> This patch adds the planar YUV 4:4:4 format to the v4l2 specification.
>
> Signed-off-by: Daniel Glöckner <dg@emlix.com>
>
> diff -r 55df63b82fef -r bd23aedbd597 v4l2-spec/Makefile
> --- a/v4l2-spec/Makefile Thu Mar 26 09:13:40 2009 +0100
> +++ b/v4l2-spec/Makefile Thu Mar 26 14:06:09 2009 +0100
> @@ -48,6 +48,7 @@
> pixfmt-yuv411p.sgml \
> pixfmt-yuv420.sgml \
> pixfmt-yuv422p.sgml \
> + pixfmt-yuv444p.sgml \
> pixfmt-yuyv.sgml \
> pixfmt-yvyu.sgml \
> pixfmt.sgml \
> diff -r 55df63b82fef -r bd23aedbd597 v4l2-spec/pixfmt-yuv444p.sgml
> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
> +++ b/v4l2-spec/pixfmt-yuv444p.sgml Thu Mar 26 14:06:09 2009 +0100
> @@ -0,0 +1,171 @@
> + <refentry id="V4L2-PIX-FMT-YUV444P">
> + <refmeta>
> + <refentrytitle>V4L2_PIX_FMT_YUV444P ('444P')</refentrytitle>
> + &manvol;
> + </refmeta>
> + <refnamediv>
> + <refname><constant>V4L2_PIX_FMT_YUV444P</constant></refname>
> + <refpurpose>Format with full horizontal and vertical chroma resolution,
> +also known as YUV 4:4:4. Planar layout</refpurpose>
> + </refnamediv>
> + <refsect1>
> + <title>Description</title>
> +
> + <para>This format is not commonly used. The three components are
> +separated into three sub-images or planes. The Y plane is first. The Cb plane
> +immediately follows the Y plane in memory. Following the Cb plane is the Cr
> +plane. All planes have on byte per pixel.</para>
s/on/one/
Regards,
Andy
> + <para>If the Y plane has pad bytes after each row, then the Cr
> +and Cb planes have the same number of pad bytes after their rows. In other
> +words, one Cx row (including padding) is exactly as long as one Y row
> +(including padding).</para>
> +
> + <example>
> + <title><constant>V4L2_PIX_FMT_YUV444P</constant> 4 × 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>start + 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>start + 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>start + 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>start + 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>start + 16:</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>start + 20:</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>start + 24:</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>start + 28:</entry>
> + <entry>Cb<subscript>30</subscript></entry>
> + <entry>Cb<subscript>31</subscript></entry>
> + <entry>Cb<subscript>32</subscript></entry>
> + <entry>Cb<subscript>33</subscript></entry>
> + </row>
> + <row>
> + <entry>start + 32:</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>start + 36:</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>start + 40:</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>start + 44:</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="5" align="center">
> + <tbody valign="top">
> + <row>
> + <entry></entry>
> + <entry>0</entry><entry>1</entry>
> + <entry>2</entry><entry>3</entry>
> + </row>
> + <row>
> + <entry>0</entry>
> + <entry>Y/C</entry><entry>Y/C</entry>
> + <entry>Y/C</entry><entry>Y/C</entry>
> + </row>
> + <row>
> + <entry>1</entry>
> + <entry>Y/C</entry><entry>Y/C</entry>
> + <entry>Y/C</entry><entry>Y/C</entry>
> + </row>
> + <row>
> + <entry>2</entry>
> + <entry>Y/C</entry><entry>Y/C</entry>
> + <entry>Y/C</entry><entry>Y/C</entry>
> + </row>
> + <row>
> + <entry>3</entry>
> + <entry>Y/C</entry><entry>Y/C</entry>
> + <entry>Y/C</entry><entry>Y/C</entry>
> + </row>
> + </tbody>
> + </tgroup>
> + </informaltable>
> + </para>
> + </formalpara>
> + </example>
> + </refsect1>
> + </refentry>
> +
> + <!--
> +Local Variables:
> +mode: sgml
> +sgml-parent-document: "pixfmt.sgml"
> +indent-tabs-mode: nil
> +End:
> + -->
> diff -r 55df63b82fef -r bd23aedbd597 v4l2-spec/pixfmt.sgml
> --- a/v4l2-spec/pixfmt.sgml Thu Mar 26 09:13:40 2009 +0100
> +++ b/v4l2-spec/pixfmt.sgml Thu Mar 26 14:06:09 2009 +0100
> @@ -596,6 +596,7 @@
> &sub-y41p;
> &sub-yuv420;
> &sub-yuv410;
> + &sub-yuv444p;
> &sub-yuv422p;
> &sub-yuv411p;
> &sub-nv12;
> --
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>
prev parent reply other threads:[~2009-03-26 22:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-26 14:30 [patch] add planar YUV 4:4:4 format Daniel Glöckner
2009-03-26 15:05 ` [patch] add documentation for " Daniel Glöckner
2009-03-26 22:32 ` Andy Walls [this message]
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