This decoder is based on Michael Hipp's mpglib code, as found in
mpg123-0.59r.  It is significantly slower than any other decoder, for
reasons I haven't bothered to look into.  As in, it takes more than my
P133 laptop has, causing massive breaks in the outputted audio stream.
This result came from using the test program, not this filter, so I don't
really know what's up.

This filter (like the others) isn't in a workable state yet.  I haven't
gotten the main chain() code working in either this or the regular mpg123
version, so neither work.

I likely will not ever finish this one, since Michael has agreed that if I
can make decent changes to make mpg123 a library, he'll go with them,
hopefully with the associated change to GPL, finally.  See
../mpg123/README for more info.
