csvorbis.Floor0.look C# (CSharp) Method

        public override Object look(DspState vd, InfoMode mi, Object i)
        {
            float scale;

            Info vi=vd.vi;
            InfoFloor0 info=(InfoFloor0)i;
            LookFloor0 look=new LookFloor0();
            look.m=info.order;
            look.n=vi.blocksizes[mi.blockflag]/2;
            look.ln=info.barkmap;
            look.vi=info;
            look.lpclook.init(look.ln,look.m);

            // we choose a scaling constant so that:
            //  floor(bark(rate/2-1)*C)=mapped-1
            // floor(bark(rate/2)*C)=mapped
            scale = look.ln / (float)toBARK((float)(info.rate/2.0));

            // the mapping from a linear scale to a smaller bark scale is
            // straightforward.  We do *not* make sure that the linear mapping
            // does not skip bark-scale bins; the decoder simply skips them and
            // the encoder may do what it wishes in filling them.  They're
            // necessary in some mapping combinations to keep the scale spacing
            // accurate
            look.linearmap=new int[look.n];

            for(int j=0; j<look.n; j++)
            {
                int val=(int)Math.Floor(toBARK((float)((info.rate/2.0)/look.n*j))
                    *scale); // bark numbers represent band edges
                if(val>=look.ln) val=look.ln; // guard against the approximation
                look.linearmap[j]=val;
            }
            return look;
        }