chroma_mc(frame.data, doffset, dstride, src, soffset, sstride, cw, ch, cx, cy);
} else {
let mut ebuf: [u8; 40*40] = [0; 40*40];
chroma_mc(frame.data, doffset, dstride, src, soffset, sstride, cw, ch, cx, cy);
} else {
let mut ebuf: [u8; 40*40] = [0; 40*40];