BTSignalCheck
-------------

BTSignalcheck is a trivial utility program for helping to show A/V receiver
or amp OSDs via a BT8x8 TV capture card on a HTPC screen (a projector, in 
most cases). It is intended to run in conjunction with WinTV2000; when 
started, it will use the DScaler driver library to monitor the "Video Signal
present" status line of the BT8x8 chip, and if it detects missing video, it
will terminate the running WinTV2k application and exit itself.

The grand idea is that you use a IR receiving Utility (like, say, Girder) to 
watch for remote control events which cause the OSD of your A/V unit to 
appear, then start WinTV2k and have it automatically go away again when 
the OSD is turned off by the A/V unit.

Here is a small batch file illustrating it's usage:

===8<===
cd c:\bt
start c:\programme\wintv\wintv2k.exe /nss /mtv
btsignalcheck
===8<===

This will start WinTV2k in Full Screen Mode, then call BTSignalCheck. 
BTSignalCheck will first sit idle for 10 seconds (to give WinTV2k time to 
initialize), then start to monitor the Video In line once every 100ms.
If it detects lack of video signal, it will send a WM_QUIT message to 
WinTV2k (if it's running), then terminate itself.

If you are using a different TV app, you need to modify the batch file 
accordingly and find your own means of terminating the TV app.

My code is hereby declared public domain, use at will. For the DScaler 
code copyright and license, please see http://www.dscaler.org/

- Olli (owagner@garagemaxx.de)