let stride = frame.stride[comp];
let offset = frame.offset[comp] + (xpos >> 1) + (ypos >> 1) * stride;
filter_chroma_edge(frame.data, offset, 1, stride, mode_l, mode_r, lim1, lim2);
let stride = frame.stride[comp];
let offset = frame.offset[comp] + (xpos >> 1) + (ypos >> 1) * stride;
filter_chroma_edge(frame.data, offset, 1, stride, mode_l, mode_r, lim1, lim2);