AC-3 decoder, soc revision 69, Aug 31 07:12:56 2006 UTC by cloud9
Fix the bugs:
1. The quality of output because of incorrect windowing coefficients.
New code for window generation.
2. Dynrng values were reset where dynrng value is present in the first block,
but not in the subsequent block.
Originally committed as revision 9667 to svn://svn.ffmpeg.org/ffmpeg/trunk