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Diffstat (limited to 'Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml')
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1 files changed, 0 insertions, 165 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml deleted file mode 100644 index c62a7360719b..000000000000 --- a/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml +++ /dev/null @@ -1,165 +0,0 @@ -<refentry id="vidioc-subdev-g-selection"> - <refmeta> - <refentrytitle>ioctl VIDIOC_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_S_SELECTION</refentrytitle> - &manvol; - </refmeta> - - <refnamediv> - <refname>VIDIOC_SUBDEV_G_SELECTION</refname> - <refname>VIDIOC_SUBDEV_S_SELECTION</refname> - <refpurpose>Get or set selection rectangles on a subdev pad</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_subdev_selection *<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_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_S_SELECTION</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>argp</parameter></term> - <listitem> - <para></para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> - - <refsect1> - <title>Description</title> - - <note> - <title>Experimental</title> - <para>This is an <link linkend="experimental">experimental</link> - interface and may change in the future.</para> - </note> - - <para>The selections are used to configure various image - processing functionality performed by the subdevs which affect the - image size. This currently includes cropping, scaling and - composition.</para> - - <para>The selection API replaces <link - linkend="vidioc-subdev-g-crop">the old subdev crop API</link>. All - the function of the crop API, and more, are supported by the - selections API.</para> - - <para>See <xref linkend="subdev"></xref> for - more information on how each selection target affects the image - processing pipeline inside the subdevice.</para> - - <refsect2> - <title>Types of selection targets</title> - - <para>There are two types of selection targets: actual and bounds. The - actual targets are the targets which configure the hardware. The BOUNDS - target will return a rectangle that contain all possible actual - rectangles.</para> - </refsect2> - - <refsect2> - <title>Discovering supported features</title> - - <para>To discover which targets are supported, the user can - perform <constant>VIDIOC_SUBDEV_G_SELECTION</constant> on them. - Any unsupported target will return - <constant>EINVAL</constant>.</para> - - <para>Selection targets and flags are documented in <xref - linkend="v4l2-selections-common"/>.</para> - - <table pgwide="1" frame="none" id="v4l2-subdev-selection"> - <title>struct <structname>v4l2_subdev_selection</structname></title> - <tgroup cols="3"> - &cs-str; - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>which</structfield></entry> - <entry>Active or try selection, from - &v4l2-subdev-format-whence;.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>pad</structfield></entry> - <entry>Pad number as reported by the media framework.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>target</structfield></entry> - <entry>Target selection rectangle. See - <xref linkend="v4l2-selections-common" />.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>flags</structfield></entry> - <entry>Flags. See - <xref linkend="v4l2-selection-flags" />.</entry> - </row> - <row> - <entry>&v4l2-rect;</entry> - <entry><structfield>r</structfield></entry> - <entry>Selection rectangle, in pixels.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>reserved</structfield>[8]</entry> - <entry>Reserved for future extensions. Applications and drivers must - set the array to zero.</entry> - </row> - </tbody> - </tgroup> - </table> - </refsect2> - - </refsect1> - - <refsect1> - &return-value; - - <variablelist> - <varlistentry> - <term><errorcode>EBUSY</errorcode></term> - <listitem> - <para>The selection rectangle can't be changed because the - pad is currently busy. This can be caused, for instance, by - an active video stream on the pad. The ioctl must not be - retried without performing another action to fix the problem - first. Only returned by - <constant>VIDIOC_SUBDEV_S_SELECTION</constant></para> - </listitem> - </varlistentry> - <varlistentry> - <term><errorcode>EINVAL</errorcode></term> - <listitem> - <para>The &v4l2-subdev-selection; - <structfield>pad</structfield> references a non-existing - pad, the <structfield>which</structfield> field references a - non-existing format, or the selection target is not - supported on the given subdev pad.</para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> -</refentry> |