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author | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-07-27 12:32:31 +0300 |
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committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-07-29 02:08:19 +0300 |
commit | 43f71d93a0cb342f0c918fba3f6abb7661e40ad2 (patch) | |
tree | a1dc7288bc480e7027ca1827ca4876472fa12e40 /Documentation/DocBook/media/v4l/vidioc-g-crop.xml | |
parent | ff9a082fda424257976f08fce942609f358015e0 (diff) | |
download | linux-43f71d93a0cb342f0c918fba3f6abb7661e40ad2.tar.xz |
doc-rst: Remove the media docbook
Now that all media documentation was converted to Sphinx, we
should get rid of the old DocBook one, as we don't want people
to submit patches against the old stuff.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/DocBook/media/v4l/vidioc-g-crop.xml')
-rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-g-crop.xml | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-crop.xml b/Documentation/DocBook/media/v4l/vidioc-g-crop.xml deleted file mode 100644 index e6c4efb9e8b4..000000000000 --- a/Documentation/DocBook/media/v4l/vidioc-g-crop.xml +++ /dev/null @@ -1,129 +0,0 @@ -<refentry id="vidioc-g-crop"> - <refmeta> - <refentrytitle>ioctl VIDIOC_G_CROP, VIDIOC_S_CROP</refentrytitle> - &manvol; - </refmeta> - - <refnamediv> - <refname>VIDIOC_G_CROP</refname> - <refname>VIDIOC_S_CROP</refname> - <refpurpose>Get or set the current cropping rectangle</refpurpose> - </refnamediv> - - <refsynopsisdiv> - <funcsynopsis> - <funcprototype> - <funcdef>int <function>ioctl</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>int <parameter>request</parameter></paramdef> - <paramdef>struct v4l2_crop *<parameter>argp</parameter></paramdef> - </funcprototype> - </funcsynopsis> - <funcsynopsis> - <funcprototype> - <funcdef>int <function>ioctl</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>int <parameter>request</parameter></paramdef> - <paramdef>const struct v4l2_crop *<parameter>argp</parameter></paramdef> - </funcprototype> - </funcsynopsis> - </refsynopsisdiv> - - <refsect1> - <title>Arguments</title> - - <variablelist> - <varlistentry> - <term><parameter>fd</parameter></term> - <listitem> - <para>&fd;</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>request</parameter></term> - <listitem> - <para>VIDIOC_G_CROP, VIDIOC_S_CROP</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>argp</parameter></term> - <listitem> - <para></para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> - - <refsect1> - <title>Description</title> - - <para>To query the cropping rectangle size and position -applications set the <structfield>type</structfield> field of a -<structname>v4l2_crop</structname> structure to the respective buffer -(stream) type and call the <constant>VIDIOC_G_CROP</constant> ioctl -with a pointer to this structure. The driver fills the rest of the -structure or returns the &EINVAL; if cropping is not supported.</para> - - <para>To change the cropping rectangle applications initialize the -<structfield>type</structfield> and &v4l2-rect; substructure named -<structfield>c</structfield> of a v4l2_crop structure and call the -<constant>VIDIOC_S_CROP</constant> ioctl with a pointer to this -structure.</para> - -<para>Do not use the multiplanar buffer types. Use <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant> -instead of <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant> -and use <constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> instead of -<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant>.</para> - - <para>The driver first adjusts the requested dimensions against -hardware limits, &ie; the bounds given by the capture/output window, -and it rounds to the closest possible values of horizontal and -vertical offset, width and height. In particular the driver must round -the vertical offset of the cropping rectangle to frame lines modulo -two, such that the field order cannot be confused.</para> - - <para>Second the driver adjusts the image size (the opposite -rectangle of the scaling process, source or target depending on the -data direction) to the closest size possible while maintaining the -current horizontal and vertical scaling factor.</para> - - <para>Finally the driver programs the hardware with the actual -cropping and image parameters. <constant>VIDIOC_S_CROP</constant> is a -write-only ioctl, it does not return the actual parameters. To query -them applications must call <constant>VIDIOC_G_CROP</constant> and -&VIDIOC-G-FMT;. When the parameters are unsuitable the application may -modify the cropping or image parameters and repeat the cycle until -satisfactory parameters have been negotiated.</para> - - <para>When cropping is not supported then no parameters are -changed and <constant>VIDIOC_S_CROP</constant> returns the -&EINVAL;.</para> - - <table pgwide="1" frame="none" id="v4l2-crop"> - <title>struct <structname>v4l2_crop</structname></title> - <tgroup cols="3"> - &cs-str; - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>type</structfield></entry> - <entry>Type of the data stream, set by the application. -Only these types are valid here: <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>, -<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> and -<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>. See <xref linkend="v4l2-buf-type" />.</entry> - </row> - <row> - <entry>&v4l2-rect;</entry> - <entry><structfield>c</structfield></entry> - <entry>Cropping rectangle. The same co-ordinate system as -for &v4l2-cropcap; <structfield>bounds</structfield> is used.</entry> - </row> - </tbody> - </tgroup> - </table> - </refsect1> - - <refsect1> - &return-value; - </refsect1> -</refentry> |