[mythtv] How to get hold of the currently tuned tsid

[roger]

  I need help on this!

How do I get hold of the currently tuned TSID from inside an EIThelper.

Specifically I need to get hold of the tsid of the current stream that 
is supplying EIT table sections to the helper. This is not the TSID that 
is carried in the EIT sections themselves, this is only valid for 
"actual" EIT tables. If the EIT table section is for an "other" table 
then the TSID in the table is only valid within the scope of original 
network ID. For reasons that are specific to the United Kingdom 
terrestrial television network I need to know the TSID of the actual TS 
stream that is carrying this "other" data. In the DVB world this 
information is carried as an informational item in the table id 
extension field of the current PAT table for the transport stream being 
processed.

I was hoping that this was stored somewhere where it was easily 
accessible from within the eithelper context. It does not appear to be. 
The best place I can get it for active scans is in the 
DTVSignalMonitor::HandlePAT , but this will require major hacking to get 
that information into the eit helper. I have not looked at the passive 
case yet.

Anyone got any ideas?

Roger