MAX_LINES_AHEAD   272 libswscale/slice.c     lumBufSize = FFMAX(lumBufSize, c->vLumFilterSize + MAX_LINES_AHEAD);
MAX_LINES_AHEAD   273 libswscale/slice.c     chrBufSize = FFMAX(chrBufSize, c->vChrFilterSize + MAX_LINES_AHEAD);