DECORRELATE       680 libavcodec/flacdec.c         DECORRELATE(a,a-b)
DECORRELATE       682 libavcodec/flacdec.c         DECORRELATE(a+b,b)
DECORRELATE       684 libavcodec/flacdec.c         DECORRELATE( (a-=b>>1) + b, a)