OBXDFilter.h File Reference

Namespaces
	sst
	Parent namespace for all Surge Synth Team code.
	sst::filters
	DSP code for Surge filters.
	sst::filters::OBXDFilter
	This namespace contains an adaptation of the filter from https://github.com/reales/OB-Xd/blob/master/Source/Engine/Filter.h.

Enumerations
enum	Poles { TWO_POLE, FOUR_POLE }
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 }

Functions
template<typename TuningProvider >
void	makeCoefficients (FilterCoefficientMaker< TuningProvider > *cm, Poles p, float freq, float reso, int sub, float sampleRateInv, TuningProvider *provider)
__m128	diodePairResistanceApprox (__m128 x)
__m128	NewtonRaphson12dB (__m128 sample, QuadFilterUnitState *__restrict f)
__m128	process_2_pole (QuadFilterUnitState *__restrict f, __m128 sample)
__m128	NewtonRaphsonR24dB (__m128 sample, __m128 lpc, QuadFilterUnitState *__restrict f)
__m128	process_4_pole (QuadFilterUnitState *__restrict f, __m128 sample)

Variables
const __m128	zero = _mm_set1_ps(0.0f)
const __m128	nine_two_zero = _mm_set1_ps(0.00920833f)
const __m128	zero_zero_five = _mm_set1_ps(0.05f)
const __m128	eight_seven_six = _mm_set1_ps(0.0876f)
const __m128	one_zero_three = _mm_set1_ps(0.0103592f)
const __m128	one_eight_five = _mm_set1_ps(0.185f)
const __m128	zero_four_five = _mm_set1_ps(0.45f)
const __m128	zero_five = _mm_set1_ps(0.5f)
const __m128	one = _mm_set1_ps(1.0f)
const __m128	one_three_five = _mm_set1_ps(1.035f)
const __m128	two = _mm_set1_ps(2.0f)
const __m128	three = _mm_set1_ps(3.0f)
const __m128	gainAdjustment2Pole = _mm_set1_ps(0.74f)
const __m128	gainAdjustment4Pole = _mm_set1_ps(0.6f)