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...