Originally committed as revision 11466 to svn://svn.ffmpeg.org/ffmpeg/trunk
The implemented range coder is an adapted version based upon "Range encoding:
an algorithm for removing redundancy from a digitised message." by G. N. N.
Martin.
-The symbols encoded by the ffmpeg range coder are bits (0|1). The
+The symbols encoded by the snow range coder are bits (0|1). The
associated probabilities are not fix but change depending on the symbol mix
seen so far.