[vdr] highly experimental liba52/AC3out patch for AIO

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

Hi,

Here is a patch that replace ac3dec in the latest AIO patch *and* still 
supports digital AC3out.
I don't have an external reciever, so most of it is guesswork. I'm not 
sure wether the constructed frames are correct or not.

This version would theoretical allow us to switch between AC3 digital 
out and software decoding at runtime (but this is not completly 
implemented yet).

Find the patch at:
http://www.cs.uni-magdeburg.de/~aschultz/dvd/aio-21.02-a52.diff.gz

Apply vdr-0.99-AIO-ELCHI-21.02.diff first!

Have fun

     Andreas