iir_halfband_decimator.h

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#pragma once
 
#include "processor.h"
#include "synth_constants.h"
 
namespace vital {
 
  class IirHalfbandDecimator : public Processor {
    public:
      static constexpr int kNumTaps9 = 2;
 
      static constexpr int kNumTaps25 = 6;
 
      static poly_float kTaps9[kNumTaps9];
 
      static poly_float kTaps25[kNumTaps25];
 
      enum {
        kAudio,     
        kNumInputs  
      };
 
      IirHalfbandDecimator();
 
      virtual ~IirHalfbandDecimator() { }
 
      virtual Processor* clone() const override {
        VITAL_ASSERT(false);
        return nullptr;
      }
 
      virtual void process(int num_samples) override;
 
      void reset(poly_mask reset_mask) override;
 
      force_inline void setSharpCutoff(bool sharp_cutoff) { sharp_cutoff_ = sharp_cutoff; }
 
    private:
      bool sharp_cutoff_;
 
      poly_float in_memory_[kNumTaps25];
 
      poly_float out_memory_[kNumTaps25];
 
      JUCE_LEAK_DETECTOR(IirHalfbandDecimator)
  };
} // namespace vital