TCustomBiquadIIRFilter

type TCustomBiquadIIRFilter = class(TCustomBandwidthIIRFilter)

protected

  FDenominator: array [1..2] of Double;

  FNominator: array [0..2] of Double;

  FPoles: array [0..1] of TComplex32;

  FZeros: array [0..1] of TComplex32;

  FState: array [0..1] of Double;

  FStateStack: array of array [0..1] of Double;

  procedure CalculatePoleZeroes; virtual;

  function GetOrder; override;

  procedure SetOrder(); override;

  procedure AssignTo(); override;

  procedure CoefficientsChanged; override;

public

  constructor Create; override;

  procedure ResetStates; override;

  procedure ResetStatesInt64; override;

  function ProcessSample32(); override;

  function ProcessSample64();

  function MagnitudeSquared(); override;

  function MagnitudeLog10(); override;

  function Phase(); override;

  function Real(); override;

  function Imaginary(); override;

  procedure Complex();

  procedure Reset; override;

  procedure PushStates; override;

  procedure PopStates; override;

end;

TCustomBiquadIIRFilter

TCustomBandwidthIIRFilter

TCustomIIRFilter

TCustomGainFrequencyFilter

TCustomFilterWithOrder

TCustomFilter

TDspSampleRatePersistent,IDspProcessor32,IDspProcessor64

TDspPersistent

TNotifiablePersistent

TObject