top_xy += s->mb_stride & (((s->current_picture.mb_type[top_xy ]>>7)&1)-1);
}
if (left_mb_field_flag != curr_mb_field_flag) {
- left_xy[1] = left_xy[0] = mb_xy - 1;
if (curr_mb_field_flag) {
left_xy[1] += s->mb_stride;
h->left_block = left_block_options[3];