unsafe void encode_residual_fixed_sub(FlacFrame frame, int order, int ch)
{
if ((frame.subframes[ch].done_fixed & (1U << order)) != 0)
return; // already calculated;
frame.current.order = order;
frame.current.type = SubframeType.Fixed;
encode_residual_fixed(frame.current.residual, frame.subframes[ch].samples, frame.blocksize, frame.current.order);
int pmax = get_max_p_order(eparams.max_partition_order, frame.blocksize, frame.current.order);
int pmin = Math.Min(eparams.min_partition_order, pmax);
frame.current.size = (uint)(frame.current.order * frame.subframes[ch].obits) + 6
+ calc_rice_params(frame.current.rc, pmin, pmax, frame.current.residual, (uint)frame.blocksize, (uint)frame.current.order, PCM.BitsPerSample);
frame.subframes[ch].done_fixed |= (1U << order);
frame.ChooseBestSubframe(ch);
}