doc-rst: Remove the media docbook

[mirror_ubuntu-zesty-kernel.git] / Documentation / DocBook / media / v4l / pixfmt-nv12mt.xml

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-    <refentry>
-      <refmeta>
-       <refentrytitle>V4L2_PIX_FMT_NV12MT ('TM12')</refentrytitle>
-       &manvol;
-      </refmeta>
-      <refnamediv>
-       <refname id="V4L2-PIX-FMT-NV12MT"><constant>V4L2_PIX_FMT_NV12MT
-</constant></refname>
-       <refpurpose>Formats with &frac12; horizontal and vertical
-chroma resolution. This format has two planes - one for luminance and one for
-chrominance. Chroma samples are interleaved. The difference to
-<constant>V4L2_PIX_FMT_NV12</constant> is the memory layout. Pixels are
-grouped in macroblocks of 64x32 size. The order of macroblocks in memory is
-also not standard.
-       </refpurpose>
-      </refnamediv>
-      <refsect1>
-       <title>Description</title>
-
-       <para>This is the two-plane versions of the YUV 4:2:0 format where data
-is grouped into 64x32 macroblocks. The three components are separated into two
-sub-images or planes. The Y plane has one byte per pixel and pixels are grouped
-into 64x32 macroblocks. The CbCr plane has the same width, in bytes, as the Y
-plane (and the image), but is half as tall in pixels. The chroma plane is also
-grouped into 64x32 macroblocks.</para>
-       <para>Width of the buffer has to be aligned to the multiple of 128, and
-height alignment is 32. Every four adjacent buffers - two horizontally and two
-vertically are grouped together and are located in memory in Z or flipped Z
-order. </para>
-       <para>Layout of macroblocks in memory is presented in the following
-figure.</para>
-       <para><figure id="nv12mt">
-           <title><constant>V4L2_PIX_FMT_NV12MT</constant> macroblock Z shape
-memory layout</title>
-           <mediaobject>
-             <imageobject>
-               <imagedata fileref="nv12mt.gif" format="GIF" />
-             </imageobject>
-           </mediaobject>
-       </figure>
-       The requirement that width is multiple of 128 is implemented because,
-the Z shape cannot be cut in half horizontally. In case the vertical resolution
-of macroblocks is odd then the last row of macroblocks is arranged in a linear
-order.  </para>
-       <para>In case of chroma the layout is identical. Cb and Cr samples are
-interleaved. Height of the buffer is aligned to 32.
-       </para>
-       <example>
-         <title>Memory layout of macroblocks in <constant>V4L2_PIX_FMT_NV12
-</constant> format pixel image - extreme case</title>
-       <para>
-       <figure id="nv12mt_ex">
-           <title>Example <constant>V4L2_PIX_FMT_NV12MT</constant> memory
-layout of macroblocks</title>
-           <mediaobject>
-             <imageobject>
-               <imagedata fileref="nv12mt_example.gif" format="GIF" />
-             </imageobject>
-           </mediaobject>
-       </figure>
-       Memory layout of macroblocks of <constant>V4L2_PIX_FMT_NV12MT
-</constant> format in most extreme case.
-       </para>
-       </example>
-      </refsect1>
-    </refentry>