Revert commit made in revision 11228. I'm getting some strange results in the downmixed output that I can't quite figure out.
Revert commit made in revision 11228. I'm getting some strange results in the
downmixed output that I can't quite figure out.

git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@11245 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg