[mythtv] FilterManager

[Andrew Mahone]

I think I have FilterManager finished, and I've ported existing filters to the 
new interface.  I wrote a quick FilterManager test app, and FilterManager 
appears to be working perfectly.  The test app enumerates available filters, 
tries to look up filters by their names, tries to load one filter, and tries 
to load all filters listed in a filter string into a new filter chain, and 
all tests are successful.

Now comes the hard part, making MythTV use the new FilterManager class.  If 
anyone has suggestion on where I ought to store the FilterManager instance, 
or where I'd need calls to load filters (they need to be reloaded any time 
frame size or format changes), it would be very helpful.  I'm going to bed 
now, hopefully over the next few days I can integrate FilterManager into 
MythTV and make sure that the ported filters function properly.

-- 
  Andrew Mahone
  andrewmahone AT eml DOT cc