[vdr] 3nd technology preview - DVD subtiles & navigation

[Andreas Schultz <aschultz@cs.uni-magdeburg.de>]

Hi all,

I have a new experimantal version of the DVD navigation patch.

http://www.cs.uni-magdeburg.de/~aschultz/dvd/vdr-0.99pre1-nav3.diff.gz

changes to -nav2:
   - limited support for still picture based menues
   - direct access to (some) menues

known issues/todo:
   - video/audio distortions at the end of menu loops
   - audio track and subtitles selction menu access
     not fully implemented
   - user operations are not surpressed as directed by the DVD (this
     especialy applies to surpressing chapter skip's in menues)

The current menue spu decoding uses *only* highlighted button area, it 
should use full SPU area. This causes problems with certain types of 
menue (e.g., "Matrix"->Language->SubTitles).

Have fun

       Andreas