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Diffstat (limited to 'v4l2-spec/vidioc-g-sliced-vbi-cap.sgml')
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1 files changed, 0 insertions, 264 deletions
diff --git a/v4l2-spec/vidioc-g-sliced-vbi-cap.sgml b/v4l2-spec/vidioc-g-sliced-vbi-cap.sgml deleted file mode 100644 index 10e721b17..000000000 --- a/v4l2-spec/vidioc-g-sliced-vbi-cap.sgml +++ /dev/null @@ -1,264 +0,0 @@ -<refentry id="vidioc-g-sliced-vbi-cap"> - <refmeta> - <refentrytitle>ioctl VIDIOC_G_SLICED_VBI_CAP</refentrytitle> - &manvol; - </refmeta> - - <refnamediv> - <refname>VIDIOC_G_SLICED_VBI_CAP</refname> - <refpurpose>Query sliced VBI capabilities</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_sliced_vbi_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_G_SLICED_VBI_CAP</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>argp</parameter></term> - <listitem> - <para></para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> - - <refsect1> - <title>Description</title> - - <para>To find out which data services are supported by a sliced -VBI capture or output device, applications initialize the -<structfield>type</structfield> field of a &v4l2-sliced-vbi-cap;, -clear the <structfield>reserved</structfield> array and -call the <constant>VIDIOC_G_SLICED_VBI_CAP</constant> ioctl. The -driver fills in the remaining fields or returns an &EINVAL; if the -sliced VBI API is unsupported or <structfield>type</structfield> -is invalid.</para> - - <para>Note the <structfield>type</structfield> field was added, -and the ioctl changed from read-only to write-read, in Linux 2.6.19.</para> - - <table pgwide="1" frame="none" id="v4l2-sliced-vbi-cap"> - <title>struct <structname>v4l2_sliced_vbi_cap</structname></title> - <tgroup cols="5"> - <colspec colname="c1" colwidth="3*" /> - <colspec colname="c2" colwidth="3*" /> - <colspec colname="c3" colwidth="2*" /> - <colspec colname="c4" colwidth="2*" /> - <colspec colname="c5" colwidth="2*" /> - <spanspec spanname="hspan" namest="c3" nameend="c5" /> - <tbody valign="top"> - <row> - <entry>__u16</entry> - <entry><structfield>service_set</structfield></entry> - <entry spanname="hspan">A set of all data services -supported by the driver. Equal to the union of all elements of the -<structfield>service_lines </structfield> array.</entry> - </row> - <row> - <entry>__u16</entry> - <entry><structfield>service_lines</structfield>[2][24]</entry> - <entry spanname="hspan">Each element of this array -contains a set of data services the hardware can look for or insert -into a particular scan line. Data services are defined in <xref - linkend="vbi-services" />. Array indices map to ITU-R -line numbers (see also <xref - linkend="vbi-525" /> and <xref -linkend="vbi-625" />) as follows:</entry> - </row> - <row> - <entry></entry> - <entry></entry> - <entry>Element</entry> - <entry>525 line systems</entry> - <entry>625 line systems</entry> - </row> - <row> - <entry></entry> - <entry></entry> - <entry><structfield>service_lines</structfield>[0][1]</entry> - <entry align="center">1</entry> - <entry align="center">1</entry> - </row> - <row> - <entry></entry> - <entry></entry> - <entry><structfield>service_lines</structfield>[0][23]</entry> - <entry align="center">23</entry> - <entry align="center">23</entry> - </row> - <row> - <entry></entry> - <entry></entry> - <entry><structfield>service_lines</structfield>[1][1]</entry> - <entry align="center">264</entry> - <entry align="center">314</entry> - </row> - <row> - <entry></entry> - <entry></entry> - <entry><structfield>service_lines</structfield>[1][23]</entry> - <entry align="center">286</entry> - <entry align="center">336</entry> - </row> - <row> - <entry></entry> - </row> - <row> - <entry></entry> - <entry></entry> - <entry spanname="hspan">The number of VBI lines the -hardware can capture or output per frame, or the number of services it -can identify on a given line may be limited. For example on PAL line -16 the hardware may be able to look for a VPS or Teletext signal, but -not both at the same time. Applications can learn about these limits -using the &VIDIOC-S-FMT; ioctl as described in <xref - linkend="sliced" />.</entry> - </row> - <row> - <entry></entry> - </row> - <row> - <entry></entry> - <entry></entry> - <entry spanname="hspan">Drivers must set -<structfield>service_lines</structfield>[0][0] and -<structfield>service_lines</structfield>[1][0] to zero.</entry> - </row> - <row> - <entry>&v4l2-buf-type;</entry> - <entry><structfield>type</structfield></entry> - <entry>Type of the data stream, see <xref - linkend="v4l2-buf-type" />. Should be -<constant>V4L2_BUF_TYPE_SLICED_VBI_CAPTURE</constant> or -<constant>V4L2_BUF_TYPE_SLICED_VBI_OUTPUT</constant>.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>reserved</structfield>[3]</entry> - <entry spanname="hspan">This array is reserved for future -extensions. Applications and drivers must set it to zero.</entry> - </row> - </tbody> - </tgroup> - </table> - - <!-- See also dev-sliced-vbi.sgml --> - <table pgwide="1" frame="none" id="vbi-services"> - <title>Sliced VBI services</title> - <tgroup cols="5"> - <colspec colname="c1" colwidth="2*" /> - <colspec colname="c2" colwidth="1*" /> - <colspec colname="c3" colwidth="1*" /> - <colspec colname="c4" colwidth="2*" /> - <colspec colname="c5" colwidth="2*" /> - <spanspec spanname='rlp' namest='c3' nameend='c5' /> - <thead> - <row> - <entry>Symbol</entry> - <entry>Value</entry> - <entry>Reference</entry> - <entry>Lines, usually</entry> - <entry>Payload</entry> - </row> - </thead> - <tbody valign="top"> - <row> - <entry><constant>V4L2_SLICED_TELETEXT_B</constant> (Teletext -System B)</entry> - <entry>0x0001</entry> - <entry><xref linkend="ets300706" />, <xref linkend="itu653" /></entry> - <entry>PAL/SECAM line 7-22, 320-335 (second field 7-22)</entry> - <entry>Last 42 of the 45 byte Teletext packet, that is -without clock run-in and framing code, lsb first transmitted.</entry> - </row> - <row> - <entry><constant>V4L2_SLICED_VPS</constant></entry> - <entry>0x0400</entry> - <entry><xref linkend="ets300231" /></entry> - <entry>PAL line 16</entry> - <entry>Byte number 3 to 15 according to Figure 9 of -ETS 300 231, lsb first transmitted.</entry> - </row> - <row> - <entry><constant>V4L2_SLICED_CAPTION_525</constant></entry> - <entry>0x1000</entry> - <entry><xref linkend="eia608" /></entry> - <entry>NTSC line 21, 284 (second field 21)</entry> - <entry>Two bytes in transmission order, including parity -bit, lsb first transmitted.</entry> - </row> - <row> - <entry><constant>V4L2_SLICED_WSS_625</constant></entry> - <entry>0x4000</entry> - <entry><xref linkend="en300294" />, <xref linkend="itu1119" /></entry> - <entry>PAL/SECAM line 23</entry> - <entry><screen> -Byte 0 1 - msb lsb msb lsb -Bit 7 6 5 4 3 2 1 0 x x 13 12 11 10 9 -</screen></entry> - </row> - <row> - <entry><constant>V4L2_SLICED_VBI_525</constant></entry> - <entry>0x1000</entry> - <entry spanname="rlp">Set of services applicable to 525 -line systems.</entry> - </row> - <row> - <entry><constant>V4L2_SLICED_VBI_625</constant></entry> - <entry>0x4401</entry> - <entry spanname="rlp">Set of services applicable to 625 -line systems.</entry> - </row> - </tbody> - </tgroup> - </table> - - </refsect1> - - <refsect1> - &return-value; - - <variablelist> - <varlistentry> - <term><errorcode>EINVAL</errorcode></term> - <listitem> - <para>The device does not support sliced VBI capturing or -output, or the value in the <structfield>type</structfield> field is -wrong.</para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> -</refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> |