NAME

Video::Capture::VBI - Functions to manipulate vbi fields & lines.

SYNOPSIS

use Video::Capture::VBI;

DESCRIPTION

new

Create a new VBI decoder object. VBI decoding often requires state, which this object represents

reset (NYI)

Reset the state (e.g. after switching a channel).

CONSTANTS / MASK OPERATORS

The following constants are available (see ETS 300 706 for a more thorough definition).

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

The following mask functions all take a single "CTRL" bitfield and return the corresponding subfield:

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...