.\" Automatically generated by Pod::Man 4.10 (Pod::Simple 3.35)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings.  \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote.  \*(C+ will
.\" give a nicer C++.  Capital omega is used to do unbreakable dashes and
.\" therefore won't be available.  \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
.    ds -- \(*W-
.    ds PI pi
.    if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
.    if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\"  diablo 12 pitch
.    ds L" ""
.    ds R" ""
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds -- \|\(em\|
.    ds PI \(*p
.    ds L" ``
.    ds R" ''
.    ds C`
.    ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
.    if \nF \{\
.        de IX
.        tm Index:\\$1\t\\n%\t"\\$2"
..
.        if !\nF==2 \{\
.            nr % 0
.            nr F 2
.        \}
.    \}
.\}
.rr rF
.\" ========================================================================
.\"
.IX Title "VBI 3pm"
.TH VBI 3pm "2018-11-01" "perl v5.28.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Video::Capture::VBI \- Functions to manipulate vbi fields & lines.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&   use Video::Capture::VBI;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
.IP "new" 4
.IX Item "new"
Create a new \s-1VBI\s0 decoder object. \s-1VBI\s0 decoding often requires state, which
this object represents
.IP "reset (\s-1NYI\s0)" 4
.IX Item "reset (NYI)"
Reset the state (e.g. after switching a channel).
.SH "CONSTANTS / MASK OPERATORS"
.IX Header "CONSTANTS / MASK OPERATORS"
The following constants are available (see \s-1ETS 300 706\s0 for a more thorough
definition).
.PP
.Vb 1
\&   VTX_SUB 0x003f7f # S1..S4 field mask
\&
\&   VTX_C4  0x000080 # erase page
\&   VTX_C5  0x004000 # newsflash
\&   VTX_C6  0x008000 # subtitle
\&   VTX_C7  0x010000 # suppress header
\&   VTX_C8  0x020000 # update indicator
\&   VTX_C9  0x040000 # interrupted sequence
\&   VTX_C10 0x080000 # inhibit display
\&   VTX_C11 0x100000 # magazine serial
\&
\&   VTX_C12 0x200000 # ... option ...
\&   VTX_C13 0x400000 # ... character ...
\&   VTX_C14 0x800000 # ... set
.Ve
.PP
The following mask functions all take a single \*(L"\s-1CTRL\*(R"\s0 bitfield and return
the corresponding subfield:
.PP
.Vb 5
\&   VTX_S1  (shift    )&15 } # S1
\&   VTX_S2  (shift>> 4)& 7 } # S2
\&   VTX_S3  (shift>> 8)&15 } # S3
\&   VTX_S4  (shift>>12)& 3 } # S4
\&   VTX_NOC (shift>>21)& 7 } # national character set...
.Ve