sst-filters: sst::filters::OBXDFilter Namespace Reference

sst-filters

Filters submodule for the Surge Synthesizer

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This namespace contains an adaptation of the filter from https://github.com/reales/OB-Xd/blob/master/Source/Engine/Filter.h. More...

Enumerations
enum	Poles { TWO_POLE , FOUR_POLE , XPANDER }

enum	Obxd12dBCoeff { g12 , R12 , multimode , bandpass , self_osc_push , n_obxd12_coeff }

enum	Obxd24dBCoeff { g24 , R24 , rcor24 , rcor24inv , pole_mix , pole_mix_inv_int , pole_mix_scaled , n_obxd24_coeff }

enum	Params { s1 , s2 , s3 , s4 }

enum	FourPoleMode { MORPH , LP6 , LP12 , LP18 , LP24 , LP24Broken , XPANDER_HP3 , XPANDER_HP2 , XPANDER_HP1 , XPANDER_BP4 , XPANDER_BP2 , XPANDER_N2 , XPANDER_PH3 , XPANDER_HP2LP1 , XPANDER_HP3LP1 , XPANDER_N2LP1 , XPANDER_PH3LP1 }

Functions
template<typename TuningProvider >
void	makeCoefficients (FilterCoefficientMaker< TuningProvider > cm, Poles p, float freq, float reso, int sub, float sampleRateInv, TuningProvider provider, bool continuousMorph=false, float morphPole01=0.f)

SIMD_M128	diodePairResistanceApprox (SIMD_M128 x)

SIMD_M128	NewtonRaphson12dB (SIMD_M128 sample, QuadFilterUnitState *__restrict f)

SIMD_M128	process_2_pole (QuadFilterUnitState *__restrict f, SIMD_M128 sample)

SIMD_M128	NewtonRaphson24dB (SIMD_M128 sample, SIMD_M128 lpc, QuadFilterUnitState *__restrict f)

template<FourPoleMode fpm>
SIMD_M128	process_4_pole (QuadFilterUnitState *__restrict f, SIMD_M128 sample)

Variables
const auto	zero = SIMD_MM(set1_ps)(0.0f)

const auto	nine_two_zero = SIMD_MM(set1_ps)(0.00920833f)

const auto	zero_zero_five = SIMD_MM(set1_ps)(0.05f)

const auto	eight_seven_six = SIMD_MM(set1_ps)(0.0876f)

const auto	one_zero_three = SIMD_MM(set1_ps)(0.0103592f)

const auto	one_eight_five = SIMD_MM(set1_ps)(0.185f)

const auto	zero_four_five = SIMD_MM(set1_ps)(0.45f)

const auto	zero_five = SIMD_MM(set1_ps)(0.5f)

const auto	one = SIMD_MM(set1_ps)(1.0f)

const auto	one_three_five = SIMD_MM(set1_ps)(1.035f)

const auto	two = SIMD_MM(set1_ps)(2.0f)

const auto	three = SIMD_MM(set1_ps)(3.0f)

const auto	gainAdjustment2Pole = SIMD_MM(set1_ps)(0.74f)

const auto	gainAdjustment4Pole = SIMD_MM(set1_ps)(0.6f)

Detailed Description

This namespace contains an adaptation of the filter from https://github.com/reales/OB-Xd/blob/master/Source/Engine/Filter.h.

Enumeration Type Documentation

◆ Poles

enum Poles

Enumerator
TWO_POLE
FOUR_POLE
XPANDER

◆ Obxd12dBCoeff

enum Obxd12dBCoeff

Enumerator
g12
R12
multimode
bandpass
self_osc_push
n_obxd12_coeff

◆ Obxd24dBCoeff

enum Obxd24dBCoeff

Enumerator
g24
R24
rcor24
rcor24inv
pole_mix
pole_mix_inv_int
pole_mix_scaled
n_obxd24_coeff

◆ Params

Enumerator
s1
s2
s3
s4

◆ FourPoleMode

enum FourPoleMode

Enumerator
MORPH
LP6
LP12
LP18
LP24
LP24Broken
XPANDER_HP3
XPANDER_HP2
XPANDER_HP1
XPANDER_BP4
XPANDER_BP2
XPANDER_N2
XPANDER_PH3
XPANDER_HP2LP1
XPANDER_HP3LP1
XPANDER_N2LP1
XPANDER_PH3LP1

Function Documentation

◆ makeCoefficients()

template<typename TuningProvider >

void makeCoefficients	(	FilterCoefficientMaker< TuningProvider > *	cm,
		Poles	p,
		float	freq,
		float	reso,
		int	sub,
		float	sampleRateInv,
		TuningProvider *	provider,
		bool	continuousMorph = `false`,
		float	morphPole01 = `0.f`
	)

References bandpass, FOUR_POLE, FilterCoefficientMaker< TuningProvider >::FromDirect(), g12, g24, multimode, sst::filters::n_cm_coeffs, pole_mix, pole_mix_inv_int, pole_mix_scaled, R12, R24, rcor24, rcor24inv, self_osc_push, TWO_POLE, and XPANDER.

Referenced by FilterCoefficientMaker< TuningProvider >::MakeCoeffs().

◆ diodePairResistanceApprox()

SIMD_M128 diodePairResistanceApprox ( SIMD_M128 x )

References nine_two_zero, one, one_eight_five, one_zero_three, and zero_zero_five.

Referenced by NewtonRaphson12dB().

◆ NewtonRaphson12dB()

SIMD_M128 NewtonRaphson12dB	(	SIMD_M128	sample,
		QuadFilterUnitState *__restrict	f
	)

References diodePairResistanceApprox(), eight_seven_six, g12, one, one_three_five, R12, s1, s2, self_osc_push, and two.

Referenced by process_2_pole().

◆ process_2_pole()

SIMD_M128 process_2_pole	(	QuadFilterUnitState *__restrict	f,
		SIMD_M128	sample
	)

References bandpass, g12, gainAdjustment2Pole, multimode, n_obxd12_coeff, NewtonRaphson12dB(), one, s1, s2, zero, and zero_five.

Referenced by sst::filters::GetCompensatedQFPtrFilterUnit().

◆ NewtonRaphson24dB()

SIMD_M128 NewtonRaphson24dB	(	SIMD_M128	sample,
		SIMD_M128	lpc,
		QuadFilterUnitState *__restrict	f
	)

References g24, one, R24, S, s1, s2, s3, and s4.

Referenced by process_4_pole().

◆ process_4_pole()

template<FourPoleMode fpm>

SIMD_M128 process_4_pole	(	QuadFilterUnitState *__restrict	f,
		SIMD_M128	sample
	)

References g24, gainAdjustment4Pole, LP12, LP18, LP24, LP24Broken, LP6, MORPH, n_obxd24_coeff, NewtonRaphson24dB(), one, pole_mix_inv_int, pole_mix_scaled, R24, rcor24, rcor24inv, s1, s2, s3, s4, three, two, XPANDER_BP2, XPANDER_BP4, XPANDER_HP1, XPANDER_HP2, XPANDER_HP2LP1, XPANDER_HP3, XPANDER_HP3LP1, XPANDER_N2, XPANDER_N2LP1, XPANDER_PH3, XPANDER_PH3LP1, zero, and zero_four_five.

Variable Documentation

◆ zero

const auto zero = SIMD_MM(set1_ps)(0.0f)

Referenced by process_2_pole(), and process_4_pole().

◆ nine_two_zero

const auto nine_two_zero = SIMD_MM(set1_ps)(0.00920833f)

Referenced by diodePairResistanceApprox().

◆ zero_zero_five

const auto zero_zero_five = SIMD_MM(set1_ps)(0.05f)

Referenced by diodePairResistanceApprox().

◆ eight_seven_six

const auto eight_seven_six = SIMD_MM(set1_ps)(0.0876f)

Referenced by NewtonRaphson12dB().

◆ one_zero_three

const auto one_zero_three = SIMD_MM(set1_ps)(0.0103592f)

Referenced by diodePairResistanceApprox().

◆ one_eight_five

const auto one_eight_five = SIMD_MM(set1_ps)(0.185f)

Referenced by diodePairResistanceApprox().

◆ zero_four_five

const auto zero_four_five = SIMD_MM(set1_ps)(0.45f)

Referenced by process_4_pole().

◆ zero_five

const auto zero_five = SIMD_MM(set1_ps)(0.5f)

Referenced by process_2_pole().

◆ one

const auto one = SIMD_MM(set1_ps)(1.0f)

Referenced by diodePairResistanceApprox(), NewtonRaphson12dB(), NewtonRaphson24dB(), process_2_pole(), and process_4_pole().

◆ one_three_five

const auto one_three_five = SIMD_MM(set1_ps)(1.035f)

Referenced by NewtonRaphson12dB().

◆ two

const auto two = SIMD_MM(set1_ps)(2.0f)

Referenced by NewtonRaphson12dB(), and process_4_pole().

◆ three

const auto three = SIMD_MM(set1_ps)(3.0f)

Referenced by process_4_pole().

◆ gainAdjustment2Pole

const auto gainAdjustment2Pole = SIMD_MM(set1_ps)(0.74f)

Referenced by process_2_pole().

◆ gainAdjustment4Pole

const auto gainAdjustment4Pole = SIMD_MM(set1_ps)(0.6f)

Referenced by process_4_pole().