fn decode_2x2_dc(br: &mut BitReader, cb: &Codebook<u16>, coeffs: &mut [i16], stride: usize, block2: bool, dsc: usize, q_dc: i16, q_ac: i16) -> DecoderResult<()> {
if dsc == 0 { return Ok(()); }
fn decode_2x2_dc(br: &mut BitReader, cb: &Codebook<u16>, coeffs: &mut [i16], stride: usize, block2: bool, dsc: usize, q_dc: i16, q_ac: i16) -> DecoderResult<()> {
if dsc == 0 { return Ok(()); }