ReverbUnitBase.hpp

00001 //--------------------------------------------------------------
00002 // Base class for Reverb unit
00003 //  2017/04/04, Copyright (c) 2017 MIKAMI, Naoki
00004 //--------------------------------------------------------------
00005 
00006 #ifndef REVERB_UNIT_BASE_HPP
00007 #define REVERB_UNIT_BASE_HPP
00008 
00009 #include "mbed.h"
00010 #include "Array.hpp"
00011 
00012 namespace Mikami
00013 {
00014     // Base class for reverb unit
00015     class ReverbBase
00016     {
00017     public:
00018         // Constructor
00019         ReverbBase(int delay)
00020             : ptr_(0), delay_(delay), un_(delay)
00021         {   Clear(); }
00022 
00023         // Clear internal delay elements
00024         void Clear()
00025         {   for (int n=0; n<delay_; n++) un_[n] = 0; }
00026 
00027     protected:
00028         float Get() { return un_[ptr_]; }
00029 
00030         float Get(int n)
00031         {
00032             int k = ptr_ + n;
00033             if (k > delay_) k -= delay_;
00034             if (k < 0) k += delay_;
00035             return un_[k];
00036         }
00037 
00038         void Set(float x)
00039         {
00040             un_[ptr_] = x;   
00041             if (++ptr_ >=  delay_) ptr_ = 0;
00042         }
00043 
00044     private:
00045         int ptr_;
00046         int delay_;
00047         Array<float> un_;   // for delay
00048 
00049         // disallow copy constructor and assignment operator
00050         ReverbBase(const ReverbBase&);
00051         ReverbBase& operator=(const ReverbBase&);
00052     };
00053 }
00054 #endif  // REVERB_UNIT_BASE_HPP