for ch in 0..self.mode.get_channels() {
let off = abuf.get_offset(ch + self.start_ch);
let mut adata = abuf.get_abuf_f32().unwrap();
- let mut output = adata.get_data_mut();
+ let output = adata.get_data_mut().unwrap();
let dst = &mut output[off..];
dsp.imdct.imdct(&self.block[ch], &mut dsp.out);