if let Some(ref mut pic) = self.cur_pic {
let mut frm = NASimpleVideoFrame::from_video_buf(&mut pic.buf).unwrap();
loop_filter_mb(&mut frm, &self.sstate, self.lf_alpha, self.lf_beta);
if let Some(ref mut pic) = self.cur_pic {
let mut frm = NASimpleVideoFrame::from_video_buf(&mut pic.buf).unwrap();
loop_filter_mb(&mut frm, &self.sstate, self.lf_alpha, self.lf_beta);