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-<refentry id="vidioc-dv-timings-cap">
- <refmeta>
- <refentrytitle>ioctl VIDIOC_DV_TIMINGS_CAP</refentrytitle>
- &manvol;
- </refmeta>
-
- <refnamediv>
- <refname>VIDIOC_DV_TIMINGS_CAP</refname>
- <refpurpose>The capabilities of the Digital Video receiver/transmitter</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_dv_timings_cap *<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_DV_TIMINGS_CAP</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>To query the available timings, applications initialize the
-<structfield>index</structfield> field and zero the reserved array of &v4l2-dv-timings-cap;
-and call the <constant>VIDIOC_DV_TIMINGS_CAP</constant> ioctl with a pointer to this
-structure. Drivers fill the rest of the structure or return an
-&EINVAL; when the index is out of bounds. To enumerate all supported DV timings,
-applications shall begin at index zero, incrementing by one until the
-driver returns <errorcode>EINVAL</errorcode>. Note that drivers may enumerate a
-different set of DV timings after switching the video input or
-output.</para>
-
- <table pgwide="1" frame="none" id="v4l2-bt-timings-cap">
- <title>struct <structname>v4l2_bt_timings_cap</structname></title>
- <tgroup cols="3">
- &cs-str;
- <tbody valign="top">
- <row>
- <entry>__u32</entry>
- <entry><structfield>min_width</structfield></entry>
- <entry>Minimum width of the active video in pixels.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>max_width</structfield></entry>
- <entry>Maximum width of the active video in pixels.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>min_height</structfield></entry>
- <entry>Minimum height of the active video in lines.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>max_height</structfield></entry>
- <entry>Maximum height of the active video in lines.</entry>
- </row>
- <row>
- <entry>__u64</entry>
- <entry><structfield>min_pixelclock</structfield></entry>
- <entry>Minimum pixelclock frequency in Hz.</entry>
- </row>
- <row>
- <entry>__u64</entry>
- <entry><structfield>max_pixelclock</structfield></entry>
- <entry>Maximum pixelclock frequency in Hz.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>standards</structfield></entry>
- <entry>The video standard(s) supported by the hardware.
- See <xref linkend="dv-bt-standards"/> for a list of standards.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>capabilities</structfield></entry>
- <entry>Several flags giving more information about the capabilities.
- See <xref linkend="dv-bt-cap-capabilities"/> for a description of the flags.
- </entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>reserved</structfield>[16]</entry>
- <entry></entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
- <table pgwide="1" frame="none" id="v4l2-dv-timings-cap">
- <title>struct <structname>v4l2_dv_timings_cap</structname></title>
- <tgroup cols="4">
- &cs-str;
- <tbody valign="top">
- <row>
- <entry>__u32</entry>
- <entry><structfield>type</structfield></entry>
- <entry>Type of DV timings as listed in <xref linkend="dv-timing-types"/>.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>reserved</structfield>[3]</entry>
- <entry>Reserved for future extensions. Drivers must set the array to zero.</entry>
- </row>
- <row>
- <entry>union</entry>
- <entry><structfield></structfield></entry>
- <entry></entry>
- </row>
- <row>
- <entry></entry>
- <entry>&v4l2-bt-timings-cap;</entry>
- <entry><structfield>bt</structfield></entry>
- <entry>BT.656/1120 timings capabilities of the hardware.</entry>
- </row>
- <row>
- <entry></entry>
- <entry>__u32</entry>
- <entry><structfield>raw_data</structfield>[32]</entry>
- <entry></entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
- <table pgwide="1" frame="none" id="dv-bt-cap-capabilities">
- <title>DV BT Timing capabilities</title>
- <tgroup cols="2">
- &cs-str;
- <tbody valign="top">
- <row>
- <entry>Flag</entry>
- <entry>Description</entry>
- </row>
- <row>
- <entry></entry>
- <entry></entry>
- </row>
- <row>
- <entry>V4L2_DV_BT_CAP_INTERLACED</entry>
- <entry>Interlaced formats are supported.
- </entry>
- </row>
- <row>
- <entry>V4L2_DV_BT_CAP_PROGRESSIVE</entry>
- <entry>Progressive formats are supported.
- </entry>
- </row>
- <row>
- <entry>V4L2_DV_BT_CAP_REDUCED_BLANKING</entry>
- <entry>CVT/GTF specific: the timings can make use of reduced blanking (CVT)
-or the 'Secondary GTF' curve (GTF).
- </entry>
- </row>
- <row>
- <entry>V4L2_DV_BT_CAP_CUSTOM</entry>
- <entry>Can support non-standard timings, i.e. timings not belonging to the
-standards set in the <structfield>standards</structfield> field.
- </entry>
- </row>
- </tbody>
- </tgroup>
- </table>
- </refsect1>
-
- <refsect1>
- &return-value;
- </refsect1>
-</refentry>
-
-<!--
-Local Variables:
-mode: sgml
-sgml-parent-document: "v4l2.sgml"
-indent-tabs-mode: nil
-End:
--->