sbl::dsp::OnePole Class Reference

#include <one_pole.hpp>

Collaboration diagram for sbl::dsp::OnePole:

Public Member Functions
void	set_coefficient (float a)
	Set filter coefficient directly.
void	set_frequency (float freq_hz, uint32_t sr=48000)
	Compute coefficient from cutoff frequency (cold path)
float	process (float x)
	Process a single sample.
void	process (float *buf, uint16_t frames)
	Process a block of samples in-place.
float	value () const
	Current filter state (last output)
float	coefficient () const
	Current coefficient.
void	reset ()
	Reset filter state to zero.
void	reset (float initial)
	Reset filter state to a specific value.

Detailed Description

Definition at line 21 of file one_pole.hpp.

Member Function Documentation

coefficient()

float sbl::dsp::OnePole::coefficient ( ) const

inline

Current coefficient.

Definition at line 79 of file one_pole.hpp.

process() [1/2]

void sbl::dsp::OnePole::process ( float *  buf, uint16_t  frames  )

inline

Process a block of samples in-place.

Parameters

buf	Audio buffer (modified in-place)
frames	Number of samples

Definition at line 69 of file one_pole.hpp.

References process().

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process() [2/2]

float sbl::dsp::OnePole::process ( float  x )

inline

Process a single sample.

Parameters

x	Input sample

Returns

Filtered output

Definition at line 58 of file one_pole.hpp.

Referenced by process(), sbl::widgets::proc::Delay::process(), and sbl::widgets::proc::PlateReverb::process().

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reset() [1/2]

void sbl::dsp::OnePole::reset ( )

inline

Reset filter state to zero.

Definition at line 82 of file one_pole.hpp.

Referenced by sbl::widgets::proc::Delay::reset(), and sbl::widgets::proc::PlateReverb::reset().

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reset() [2/2]

void sbl::dsp::OnePole::reset ( float  initial )

inline

Reset filter state to a specific value.

Definition at line 85 of file one_pole.hpp.

set_coefficient()

void sbl::dsp::OnePole::set_coefficient ( float  a )

inline

Set filter coefficient directly.

Note

All public methods are ISR-safe — bounded computation, no I/O.

a = 0.0 → no filtering (hold previous output), 1.0 → full passthrough. For audio-rate smoothing: ~0.03-0.12. For parameter smoothing: ~0.002-0.008.

Definition at line 31 of file one_pole.hpp.

Referenced by sbl::widgets::proc::PlateReverb::set_damping(), and sbl::widgets::proc::Delay::set_tone().

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set_frequency()

void sbl::dsp::OnePole::set_frequency ( float  freq_hz, uint32_t  sr = 48000  )

inline

Compute coefficient from cutoff frequency (cold path)

Uses approximation of 1 - exp(-2pi * fc / sr).

Parameters

freq_hz	Cutoff frequency in Hz
sr	Sample rate

Definition at line 41 of file one_pole.hpp.

Referenced by sbl::widgets::proc::PlateReverb::set_sample_rate().

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value()

float sbl::dsp::OnePole::value ( ) const

inline

Current filter state (last output)

Definition at line 76 of file one_pole.hpp.

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

• src/sbl/dsp/one_pole.hpp