Professional multi-mode filter with cascaded biquad stages. More...

#include <Filters.h>

Collaboration diagram for dspark::FilterEngine< T, MaxChannels >:

[legend]

Classes
struct	ButterworthCascade

struct	CascadeInfo
	Per-stage Butterworth cascade layout for an LP/HP slope (for analysis). More...

Public Types
enum class	Shape { LowPass , HighPass , BandPass , Peak , LowShelf , HighShelf , Notch , AllPass , Tilt }
	Supported filter shapes. More...

Public Member Functions
	~FilterEngine ()=default

void	prepare (const AudioSpec &spec)
	Initializes the filter engine with the current audio specification.

void	reset () noexcept
	Resets the internal state of all cascaded biquads and smoothers. Prevents clicks when relocating playback or enabling the effect.

void	setLowPass (float freq, float Q=0.707f, int slopeDb=12)
	Configures a low-pass filter.

void	setHighPass (float freq, float Q=0.707f, int slopeDb=12)
	Configures a high-pass filter.

void	setBandPass (float freq, float Q=0.707f)
	Configures a band-pass filter (fixed 12 dB/oct).

void	setPeaking (float freq, float gainDb, float Q=1.0f)
	Configures a peaking / bell EQ filter.

void	setLowShelf (float freq, float gainDb, float slope=1.0f)
	Configures a low-shelf EQ filter.

void	setHighShelf (float freq, float gainDb, float slope=1.0f)
	Configures a high-shelf EQ filter.

void	setNotch (float freq, float Q=10.0f)
	Configures a notch (band-reject) filter.

void	setAllPass (float freq, float Q=0.707f)
	Configures an all-pass filter (shifts phase, flat frequency response).

void	setTilt (float centerFreq, float gainDb)
	Configures a tilt EQ filter (boost highs/cut lows or vice versa).

void	setMatchedPeak (bool enabled) noexcept
	Selects the analog-matched (de-cramped) design for Peak bells.

bool	isMatchedPeak () const noexcept
	Returns whether Peak bells use the matched (de-cramped) design.

void	setShelfSlope (float slope) noexcept
	Sets the shelf slope S on its own (LowShelf/HighShelf shapes).

float	getShelfSlope () const noexcept
	Returns the shelf slope S used by the shelf shapes.

Shape	getShape () const noexcept
	Returns the active filter shape.

int	getSlopeDb () const noexcept
	Returns the active slope in dB/oct (LP/HP only - others = 12).

void	setShape (Shape newShape, int slopeDb=12) noexcept
	Switches the filter topology while keeping the current frequency, resonance, and gain unchanged.

void	setFrequency (float freq) noexcept
	Sets the target cutoff/center frequency. Thread-safe.

void	setResonance (float Q) noexcept
	Sets the target resonance/Q. Thread-safe.

void	setGain (float dB) noexcept
	Sets the target gain in dB. Thread-safe.

void	setNonlinearity (T amount) noexcept
	Sets the nonlinearity amount. Thread-safe.

void	enableAnalogDrift (AnalogRandom::AnalogComponent component, float intensity=0.5f)
	Enables analog-style low-frequency modulation of the cutoff.

void	disableAnalogDrift () noexcept
	Disables analog-style drift modulation. Thread-safe.

void	setDriftSeed (std::uint64_t seed) noexcept
	Makes the analog drift reproducible.

std::uint64_t	getDriftSeed () const noexcept
	The drift seed set by setDriftSeed(); 0 when the drift uses the instance's own unique seed.

void	processBlock (AudioBufferView< T > buffer) noexcept
	Processes an entire block of audio data. Internally branches into static, smoothed, or nonlinear processing paths to optimize CPU usage and allow auto-vectorization when possible.

T	processSample (T input, int channel) noexcept
	Processes a single sample without parameter smoothing or coefficient updates.

void	applyParametersNow () noexcept
	Applies pending parameter targets immediately and rebuilds the coefficients (no smoothing: values jump).

std::vector< uint8_t >	getState () const
	Serializes the parameter state (setup/UI threads; allocates).

bool	setState (const uint8_t *data, size_t size)
	Restores parameters from a blob (tolerant; rejects foreign ids).

Static Public Member Functions
static CascadeInfo	cascadeForSlope (int slopeDb, float userQ=0.707f) noexcept
	Returns the exact Butterworth cascade (first-order flag + per-stage Q values) used internally for a given LP/HP slope. Lets callers reproduce the true cascade magnitude instead of approximating with a single Q.

Protected Member Functions
void	updateCoefficients (float freq, float Q, float gainDb) noexcept

Static Protected Member Functions
static ButterworthCascade	computeCascade (int slopeDb) noexcept

static int	slopeToStages (int slopeDb) noexcept

Protected Attributes
AudioSpec	spec_ {}

std::atomic< Shape >	shape_ { Shape::LowPass }

std::atomic< int >	numStages_ { 1 }

std::atomic< int >	slopeDb_ { 12 }

std::atomic< float >	shelfSlope_ { 1.0f }

std::atomic< bool >	matchedPeak_ { false }

std::array< Biquad< T, MaxChannels >, kMaxStages >	stages_ {}

Smoothers::StateVariableSmoother	freqSmoother_

Smoothers::LinearSmoother	resSmoother_

Smoothers::LinearSmoother	gainSmoother_

std::atomic< float >	targetFreq_ {1000.0f}

std::atomic< float >	targetRes_ {0.707f}

std::atomic< float >	targetGain_ {0.0f}

std::atomic< float >	targetNonlinearity_ {0.0f}

std::atomic< bool >	driftEnabled_ { false }

std::atomic< float >	driftIntensity_ { 0.0f }

std::atomic< std::uint64_t >	driftSeed_ { 0 }
	0 = the instance's unique seed.

AnalogRandom::Generator< float >	driftGen_

float	lastFreq_ = -1.0f

float	lastQ_ = -1.0f

float	lastGain_ = -1e9f

Shape	lastShape_ = Shape::LowPass

int	lastSlopeDb_ = -1

bool	lastMatched_ = false

float	lastShelfSlope_ = -1.0f
	Shelf S: a slope-only change must rebuild coeffs.

Static Protected Attributes
static constexpr int	kMaxStages = 4

static constexpr int	kMaxOrder = 8

Detailed Description

template<typename T, int MaxChannels = 16>
class dspark::FilterEngine< T, MaxChannels >

Professional multi-mode filter with cascaded biquad stages.

Utilizes SIMD-friendly branching and atomic parameter states for thread-safe real-time manipulation.

Template Parameters

T	Sample type (float or double).
MaxChannels	Maximum number of audio channels allowed.

Definition at line 72 of file Filters.h.

Member Enumeration Documentation

◆ Shape

template<typename T , int MaxChannels = 16>

enum class dspark::FilterEngine::Shape

strong

Supported filter shapes.

Enumerator
LowPass
HighPass
BandPass
Peak
LowShelf
HighShelf
Notch
AllPass
Tilt

Definition at line 81 of file Filters.h.

Constructor & Destructor Documentation

◆ ~FilterEngine()

template<typename T , int MaxChannels = 16>

dspark::FilterEngine< T, MaxChannels >::~FilterEngine ( )

default

Member Function Documentation

◆ applyParametersNow()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::applyParametersNow ( )

inlinenoexcept

Applies pending parameter targets immediately and rebuilds the coefficients (no smoothing: values jump).

For per-sample workflows where processBlock() never runs, so the atomic parameter targets would otherwise never reach the biquad stages. Owner (audio) thread only, like processSample().

Definition at line 637 of file Filters.h.

◆ cascadeForSlope()

template<typename T , int MaxChannels = 16>

static CascadeInfo dspark::FilterEngine< T, MaxChannels >::cascadeForSlope	(	int	slopeDb,
		float	userQ = `0.707f`
	)

inlinestaticnoexcept

Returns the exact Butterworth cascade (first-order flag + per-stage Q values) used internally for a given LP/HP slope. Lets callers reproduce the true cascade magnitude instead of approximating with a single Q.

Parameters

slopeDb	Slope in dB/octave (6..48).
userQ	The engine's resonance parameter: scales the final stage exactly as updateCoefficients() does (neutral at the 0.707 default, resonant peak above it).

Definition at line 325 of file Filters.h.

◆ computeCascade()

template<typename T , int MaxChannels = 16>

static ButterworthCascade dspark::FilterEngine< T, MaxChannels >::computeCascade ( int slopeDb )

inlinestaticprotectednoexcept

Definition at line 722 of file Filters.h.

◆ disableAnalogDrift()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::disableAnalogDrift ( )

inlinenoexcept

Disables analog-style drift modulation. Thread-safe.

Definition at line 441 of file Filters.h.

◆ enableAnalogDrift()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::enableAnalogDrift	(	AnalogRandom::AnalogComponent	component,
		float	intensity = `0.5f`
	)

inline

Enables analog-style low-frequency modulation of the cutoff.

Note: Setup thread only (it re-prepares the internal generator, which is not safe concurrently with processBlock). Call prepare() first so the generator receives the real sample rate.

Parameters

component	The analog component profile to simulate.
intensity	Modulation depth (0.0 to 1.0). Non-finite values are ignored.

Definition at line 429 of file Filters.h.

◆ getDriftSeed()

template<typename T , int MaxChannels = 16>

std::uint64_t dspark::FilterEngine< T, MaxChannels >::getDriftSeed ( ) const

inlinenoexcept

The drift seed set by setDriftSeed(); 0 when the drift uses the instance's own unique seed.

Definition at line 464 of file Filters.h.

◆ getShape()

template<typename T , int MaxChannels = 16>

Shape dspark::FilterEngine< T, MaxChannels >::getShape ( ) const

inlinenoexcept

Returns the active filter shape.

Definition at line 307 of file Filters.h.

◆ getShelfSlope()

template<typename T , int MaxChannels = 16>

float dspark::FilterEngine< T, MaxChannels >::getShelfSlope ( ) const

inlinenoexcept

Returns the shelf slope S used by the shelf shapes.

Definition at line 301 of file Filters.h.

◆ getSlopeDb()

template<typename T , int MaxChannels = 16>

int dspark::FilterEngine< T, MaxChannels >::getSlopeDb ( ) const

inlinenoexcept

Returns the active slope in dB/oct (LP/HP only - others = 12).

Definition at line 310 of file Filters.h.

◆ getState()

template<typename T , int MaxChannels = 16>

std::vector< uint8_t > dspark::FilterEngine< T, MaxChannels >::getState ( ) const

inline

Serializes the parameter state (setup/UI threads; allocates).

Definition at line 663 of file Filters.h.

◆ isMatchedPeak()

template<typename T , int MaxChannels = 16>

bool dspark::FilterEngine< T, MaxChannels >::isMatchedPeak ( ) const

inlinenoexcept

Returns whether Peak bells use the matched (de-cramped) design.

Definition at line 277 of file Filters.h.

◆ prepare()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::prepare ( const AudioSpec & spec )

inline

Initializes the filter engine with the current audio specification.

Parameters

spec	The audio specification containing sample rate and block size. An invalid spec (non-positive or NaN fields) is ignored.

Definition at line 94 of file Filters.h.

◆ processBlock()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::processBlock ( AudioBufferView< T > buffer )

inlinenoexcept

Processes an entire block of audio data. Internally branches into static, smoothed, or nonlinear processing paths to optimize CPU usage and allow auto-vectorization when possible.

Parameters

buffer View of the audio buffer to process in-place.

Definition at line 478 of file Filters.h.

◆ processSample()

template<typename T , int MaxChannels = 16>

T dspark::FilterEngine< T, MaxChannels >::processSample	(	T	input,
		int	channel
	)

inlinenoexcept

Processes a single sample without parameter smoothing or coefficient updates.

Warning: Must only be used when parameter changes are managed externally: call applyParametersNow() after changing parameters, or rely on processBlock() to consume them (it smooths).

Parameters

input	Input sample value.
channel	Index of the audio channel being processed. Out-of-range channels return the input unprocessed (the per-channel biquad state is bounded to MaxChannels).

Returns: T Processed sample value.

Definition at line 619 of file Filters.h.

◆ reset()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::reset ( )

inlinenoexcept

Resets the internal state of all cascaded biquads and smoothers. Prevents clicks when relocating playback or enabling the effect.

Definition at line 115 of file Filters.h.

◆ setAllPass()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setAllPass	(	float	freq,
		float	Q = `0.707f`
	)

inline

Configures an all-pass filter (shifts phase, flat frequency response).

Parameters

freq	Phase transition center frequency in Hz.
Q	Quality factor.

Definition at line 239 of file Filters.h.

◆ setBandPass()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setBandPass	(	float	freq,
		float	Q = `0.707f`
	)

inline

Configures a band-pass filter (fixed 12 dB/oct).

Parameters

freq	Target center frequency in Hz.
Q	Quality factor (bandwidth control).

Definition at line 163 of file Filters.h.

◆ setDriftSeed()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setDriftSeed ( std::uint64_t seed )

inlinenoexcept

Makes the analog drift reproducible.

By default every instance draws its drift from its own unique seed, so two filters never wander together and no two renders of the same session drift alike. A non-zero seed pins the drift instead: from the next block, and again after every reset() and prepare(), the drift sequence restarts from that seed, so rendering the same input twice with the same settings produces the same output sample for sample. Zero returns to the default unique seed, and the drift carries on from wherever it is. Thread-safe, lock free; applied on the audio thread's next block.

Definition at line 456 of file Filters.h.

◆ setFrequency()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setFrequency ( float freq )

inlinenoexcept

Sets the target cutoff/center frequency. Thread-safe.

Parameters

freq	Frequency in Hz. Non-finite values are ignored.

Definition at line 375 of file Filters.h.

◆ setGain()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setGain ( float dB )

inlinenoexcept

Sets the target gain in dB. Thread-safe.

Parameters

dB	Gain in decibels. Non-finite values are ignored.

Definition at line 401 of file Filters.h.

◆ setHighPass()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setHighPass	(	float	freq,
		float	Q = `0.707f`,
		int	slopeDb = `12`
	)

inline

Configures a high-pass filter.

Parameters

freq	Target cutoff frequency in Hz.
Q	Quality factor (0.707 = Butterworth).
slopeDb	Slope in dB/octave (6, 12, 18, 24, 30, 36, 42, 48).

Definition at line 149 of file Filters.h.

◆ setHighShelf()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setHighShelf	(	float	freq,
		float	gainDb,
		float	slope = `1.0f`
	)

inline

Configures a high-shelf EQ filter.

Parameters

freq	Target transition frequency in Hz.
gainDb	Gain in dB to boost or cut.
slope	Shelf transition slope (1.0 = standard).

Definition at line 210 of file Filters.h.

◆ setLowPass()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setLowPass	(	float	freq,
		float	Q = `0.707f`,
		int	slopeDb = `12`
	)

inline

Configures a low-pass filter.

Parameters

freq	Target cutoff frequency in Hz.
Q	Quality factor (0.707 = Butterworth).
slopeDb	Slope in dB/octave (6, 12, 18, 24, 30, 36, 42, 48).

Definition at line 134 of file Filters.h.

◆ setLowShelf()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setLowShelf	(	float	freq,
		float	gainDb,
		float	slope = `1.0f`
	)

inline

Configures a low-shelf EQ filter.

Parameters

freq	Target transition frequency in Hz.
gainDb	Gain in dB to boost or cut.
slope	Shelf transition slope (1.0 = standard).

Definition at line 194 of file Filters.h.

◆ setMatchedPeak()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setMatchedPeak ( bool enabled )

inlinenoexcept

Selects the analog-matched (de-cramped) design for Peak bells.

Bilinear bells cramp near Nyquist; the matched design (BiquadCoeffs::makePeakMatched) keeps high bells on their analog shape. Off by default (bit-compatible with previous output). Thread-safe. Not serialized by getState()/setState(); owners that persist it must re-apply it on restore (Equalizer does).

Definition at line 271 of file Filters.h.

◆ setNonlinearity()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setNonlinearity ( T amount )

inlinenoexcept

Sets the nonlinearity amount. Thread-safe.

Parameters

amount 0 = linear (default), 1 = full nonlinearity. Non-finite values are ignored.

Definition at line 412 of file Filters.h.

◆ setNotch()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setNotch	(	float	freq,
		float	Q = `10.0f`
	)

inline

Configures a notch (band-reject) filter.

Parameters

freq	Target center frequency in Hz.
Q	Quality factor (bandwidth of the cut).

Definition at line 225 of file Filters.h.

◆ setPeaking()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setPeaking	(	float	freq,
		float	gainDb,
		float	Q = `1.0f`
	)

inline

Configures a peaking / bell EQ filter.

Parameters

freq	Target center frequency in Hz.
gainDb	Gain in dB to boost or cut.
Q	Quality factor.

Definition at line 178 of file Filters.h.

◆ setResonance()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setResonance ( float Q )

inlinenoexcept

Sets the target resonance/Q. Thread-safe.

For LowPass/HighPass the cascade stays an exact Butterworth at the default Q (0.707) and larger values scale the final (most resonant) stage, adding the classic resonant peak at the cutoff. The 6 dB/oct slope is first-order and has no Q.

Parameters

Q	Quality factor. Non-finite values are ignored.

Definition at line 391 of file Filters.h.

◆ setShape()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setShape	(	Shape	newShape,
		int	slopeDb = `12`
	)

inlinenoexcept

Switches the filter topology while keeping the current frequency, resonance, and gain unchanged.

Useful for UI dropdowns where the user expects the existing slider values to carry over when they pick a different filter type. For one-shot setup with explicit parameters, the setLowPass()/setPeaking()/etc. helpers are still preferred.

Parameters

newShape	Target filter shape. Out-of-range values (a wild cast or corrupt state blob) are clamped into the enum range.
slopeDb	Slope in dB/octave (only used by LP/HP, default 12).

Definition at line 350 of file Filters.h.

◆ setShelfSlope()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setShelfSlope ( float slope )

inlinenoexcept

Sets the shelf slope S on its own (LowShelf/HighShelf shapes).

The granular counterpart of the slope argument of setLowShelf() / setHighShelf(), for parameter models with one setter per parameter. RBJ semantics: 1.0 is the steepest shelf without overshoot, smaller values are gentler. Clamped to [0.0001, 1]; non-finite values are ignored (a NaN slope would otherwise pass the design clamp and turn every coefficient into NaN). Thread-safe; applied at the next block.

Parameters

slope Shelf slope S in (0, 1].

Definition at line 294 of file Filters.h.

◆ setState()

template<typename T , int MaxChannels = 16>

bool dspark::FilterEngine< T, MaxChannels >::setState	(	const uint8_t *	data,
		size_t	size
	)

inline

Restores parameters from a blob (tolerant; rejects foreign ids).

Definition at line 677 of file Filters.h.

◆ setTilt()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::setTilt	(	float	centerFreq,
		float	gainDb
	)

inline

Configures a tilt EQ filter (boost highs/cut lows or vice versa).

Parameters

centerFreq	Pivot frequency in Hz.
gainDb	Positive = bright, negative = dark.

Definition at line 253 of file Filters.h.

◆ slopeToStages()

template<typename T , int MaxChannels = 16>

static int dspark::FilterEngine< T, MaxChannels >::slopeToStages ( int slopeDb )

inlinestaticprotectednoexcept

Definition at line 744 of file Filters.h.

◆ updateCoefficients()

template<typename T , int MaxChannels = 16>

void dspark::FilterEngine< T, MaxChannels >::updateCoefficients	(	float	freq,
		float	Q,
		float	gainDb
	)

inlineprotectednoexcept

Definition at line 750 of file Filters.h.

Member Data Documentation

◆ driftEnabled_

template<typename T , int MaxChannels = 16>

std::atomic<bool> dspark::FilterEngine< T, MaxChannels >::driftEnabled_ { false }

protected

Definition at line 842 of file Filters.h.

◆ driftGen_

template<typename T , int MaxChannels = 16>

AnalogRandom::Generator<float> dspark::FilterEngine< T, MaxChannels >::driftGen_

protected

Definition at line 845 of file Filters.h.

◆ driftIntensity_

template<typename T , int MaxChannels = 16>

std::atomic<float> dspark::FilterEngine< T, MaxChannels >::driftIntensity_ { 0.0f }

protected

Definition at line 843 of file Filters.h.

◆ driftSeed_

template<typename T , int MaxChannels = 16>

std::atomic<std::uint64_t> dspark::FilterEngine< T, MaxChannels >::driftSeed_ { 0 }

protected

0 = the instance's unique seed.

Definition at line 844 of file Filters.h.

◆ freqSmoother_

template<typename T , int MaxChannels = 16>

Smoothers::StateVariableSmoother dspark::FilterEngine< T, MaxChannels >::freqSmoother_

protected

Definition at line 830 of file Filters.h.

◆ gainSmoother_

template<typename T , int MaxChannels = 16>

Smoothers::LinearSmoother dspark::FilterEngine< T, MaxChannels >::gainSmoother_

protected

Definition at line 831 of file Filters.h.

◆ kMaxOrder

template<typename T , int MaxChannels = 16>

constexpr int dspark::FilterEngine< T, MaxChannels >::kMaxOrder = 8

staticconstexprprotected

Definition at line 712 of file Filters.h.

◆ kMaxStages

template<typename T , int MaxChannels = 16>

constexpr int dspark::FilterEngine< T, MaxChannels >::kMaxStages = 4

staticconstexprprotected

Definition at line 711 of file Filters.h.

◆ lastFreq_

template<typename T , int MaxChannels = 16>

float dspark::FilterEngine< T, MaxChannels >::lastFreq_ = -1.0f

protected

Definition at line 848 of file Filters.h.

◆ lastGain_

template<typename T , int MaxChannels = 16>

float dspark::FilterEngine< T, MaxChannels >::lastGain_ = -1e9f

protected

Definition at line 850 of file Filters.h.

◆ lastMatched_

template<typename T , int MaxChannels = 16>

bool dspark::FilterEngine< T, MaxChannels >::lastMatched_ = false

protected

Definition at line 853 of file Filters.h.

◆ lastQ_

template<typename T , int MaxChannels = 16>

float dspark::FilterEngine< T, MaxChannels >::lastQ_ = -1.0f

protected

Definition at line 849 of file Filters.h.

◆ lastShape_

template<typename T , int MaxChannels = 16>

Shape dspark::FilterEngine< T, MaxChannels >::lastShape_ = Shape::LowPass

protected

Definition at line 851 of file Filters.h.

◆ lastShelfSlope_

template<typename T , int MaxChannels = 16>

float dspark::FilterEngine< T, MaxChannels >::lastShelfSlope_ = -1.0f

protected

Shelf S: a slope-only change must rebuild coeffs.

Definition at line 854 of file Filters.h.

◆ lastSlopeDb_

template<typename T , int MaxChannels = 16>

int dspark::FilterEngine< T, MaxChannels >::lastSlopeDb_ = -1

protected

Definition at line 852 of file Filters.h.

◆ matchedPeak_

template<typename T , int MaxChannels = 16>

std::atomic<bool> dspark::FilterEngine< T, MaxChannels >::matchedPeak_ { false }

protected

Definition at line 826 of file Filters.h.

◆ numStages_

template<typename T , int MaxChannels = 16>

std::atomic<int> dspark::FilterEngine< T, MaxChannels >::numStages_ { 1 }

protected

Definition at line 823 of file Filters.h.

◆ resSmoother_

template<typename T , int MaxChannels = 16>

Smoothers::LinearSmoother dspark::FilterEngine< T, MaxChannels >::resSmoother_

protected

Definition at line 831 of file Filters.h.

◆ shape_

template<typename T , int MaxChannels = 16>

std::atomic<Shape> dspark::FilterEngine< T, MaxChannels >::shape_ { Shape::LowPass }

protected

Definition at line 822 of file Filters.h.

◆ shelfSlope_

template<typename T , int MaxChannels = 16>

std::atomic<float> dspark::FilterEngine< T, MaxChannels >::shelfSlope_ { 1.0f }

protected

Definition at line 825 of file Filters.h.

◆ slopeDb_

template<typename T , int MaxChannels = 16>

std::atomic<int> dspark::FilterEngine< T, MaxChannels >::slopeDb_ { 12 }

protected

Definition at line 824 of file Filters.h.

◆ spec_

template<typename T , int MaxChannels = 16>

AudioSpec dspark::FilterEngine< T, MaxChannels >::spec_ {}

protected

Definition at line 818 of file Filters.h.

◆ stages_

template<typename T , int MaxChannels = 16>

std::array<Biquad<T, MaxChannels>, kMaxStages> dspark::FilterEngine< T, MaxChannels >::stages_ {}

protected

Definition at line 828 of file Filters.h.

◆ targetFreq_

template<typename T , int MaxChannels = 16>

std::atomic<float> dspark::FilterEngine< T, MaxChannels >::targetFreq_ {1000.0f}

protected

Definition at line 834 of file Filters.h.

◆ targetGain_

template<typename T , int MaxChannels = 16>

std::atomic<float> dspark::FilterEngine< T, MaxChannels >::targetGain_ {0.0f}

protected

Definition at line 836 of file Filters.h.

◆ targetNonlinearity_

template<typename T , int MaxChannels = 16>

std::atomic<float> dspark::FilterEngine< T, MaxChannels >::targetNonlinearity_ {0.0f}

protected

Definition at line 837 of file Filters.h.

◆ targetRes_

template<typename T , int MaxChannels = 16>

std::atomic<float> dspark::FilterEngine< T, MaxChannels >::targetRes_ {0.707f}

protected

Definition at line 835 of file Filters.h.

The documentation for this class was generated from the following file:

Filters.h

Classes

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Member Enumeration Documentation

◆ Shape

Constructor & Destructor Documentation

◆ ~FilterEngine()

Member Function Documentation

◆ applyParametersNow()

◆ cascadeForSlope()

◆ computeCascade()

◆ disableAnalogDrift()

◆ enableAnalogDrift()

◆ getDriftSeed()

◆ getShape()

◆ getShelfSlope()

◆ getSlopeDb()

◆ getState()

◆ isMatchedPeak()

◆ prepare()

◆ processBlock()

◆ processSample()

◆ reset()

◆ setAllPass()

◆ setBandPass()

◆ setDriftSeed()

◆ setFrequency()

◆ setGain()

◆ setHighPass()

◆ setHighShelf()

◆ setLowPass()

◆ setLowShelf()

◆ setMatchedPeak()

◆ setNonlinearity()

◆ setNotch()

◆ setPeaking()

◆ setResonance()

◆ setShape()

◆ setShelfSlope()

◆ setState()

◆ setTilt()

◆ slopeToStages()

◆ updateCoefficients()

Member Data Documentation

◆ driftEnabled_

◆ driftGen_

◆ driftIntensity_

◆ driftSeed_

◆ freqSmoother_

◆ gainSmoother_

◆ kMaxOrder

◆ kMaxStages

◆ lastFreq_

◆ lastGain_

◆ lastMatched_

◆ lastQ_

◆ lastShape_

◆ lastShelfSlope_

◆ lastSlopeDb_

◆ matchedPeak_

◆ numStages_

◆ resSmoother_

◆ shape_

◆ shelfSlope_

◆ slopeDb_

◆ spec_

◆ stages_

◆ targetFreq_

◆ targetGain_

◆ targetNonlinearity_

◆ targetRes_