merge encrypt and decrypt so the source is simpler and the compiler can choose with inlining if it wants speed or small size
merge encrypt and decrypt so the source is simpler and the compiler can choose with inlining if it wants speed or small size


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@7494 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

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