(partially, it seems roughly three times as fast as
the C code according to quick-n-dirty gprof tests)
This one is bit-perfect.
patch by Romain Dolbeau <dolbeau@irisa.fr>
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9003 b3059339-0415-0410-9bf9-f77b7e298cf2