iir.h

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#ifndef SRC_IIR_H_
#define SRC_IIR_H_
 
#include <stdlib.h>
 
#include <vector>
 
namespace IIR {
 
struct Nodes {
  float b0;
  float b1;
  float b2;
  float a0;
  float a1;
  float a2;
  float tap1;
  float tap2;
};
 
struct SmoothingSettings {
  std::vector<std::vector<float>> coefficients;
};
 
class IIR2ndOrderFilter {
 private:
  Nodes nodes;
 
 public:
  explicit IIR2ndOrderFilter(std::vector<float> coefficients);
 
  float run(float x);
};
 
class IIRFilter {
 private:
  std::vector<IIR2ndOrderFilter> filters;
 
 public:
  explicit IIRFilter(SmoothingSettings smoothing_settings);
 
  void set(float x);
 
  float run(float x);
};
 
}  // namespace IIR
#endif  // SRC_IIR_H_