sbl::dsp::primitives::AllpassFilter Class Reference

Detailed Description

Definition at line 25 of file allpass_filter.hpp.

#include <allpass_filter.hpp>

Public Member Functions
	AllpassFilter (float *buffer, uint32_t delay)
	Construct with caller-provided buffer.
	AllpassFilter ()=default
	Default constructor for array initialization (must call init() before use)
void	init (float *buffer, uint32_t delay)
	Initialize after default construction.
float	process (float x)
	Process a single sample.
void	set_feedback (float g)
	Set feedback coefficient.
float	feedback () const
	Current feedback coefficient.
void	reset ()
	Zero the buffer and reset write position.
uint32_t	delay () const
	Delay length in samples.
uint32_t	write_pos () const
	Current write position (for external tap reads)

Constructor & Destructor Documentation

AllpassFilter() [1/2]

sbl::dsp::primitives::AllpassFilter::AllpassFilter ( float *  buffer, uint32_t  delay  )

inline

Construct with caller-provided buffer.

Note

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

Parameters

buffer	Float buffer (must outlive the AllpassFilter)
delay	Delay length in samples (buffer size)

Definition at line 34 of file allpass_filter.hpp.

AllpassFilter() [2/2]

sbl::dsp::primitives::AllpassFilter::AllpassFilter ( )

default

Default constructor for array initialization (must call init() before use)

Member Function Documentation

init()

void sbl::dsp::primitives::AllpassFilter::init ( float *  buffer, uint32_t  delay  )

inline

Initialize after default construction.

Parameters

buffer	Float buffer (must outlive the AllpassFilter)
delay	Delay length in samples

Definition at line 45 of file allpass_filter.hpp.

References delay().

Referenced by sbl::dsp::modules::AlgoReverb< ScalePercent >::init().

process()

float sbl::dsp::primitives::AllpassFilter::process ( float  x )

inline

Process a single sample.

Schroeder allpass: y = -g*x + x[n-d] + g*y[n-d] where the buffer stores the output history.

Parameters

x	Input sample in [-1.0, 1.0]

Returns

Allpass-filtered output in [-1.0, 1.0]

Definition at line 60 of file allpass_filter.hpp.

Referenced by sbl::dsp::modules::AlgoReverb< ScalePercent >::process().

set_feedback()

void sbl::dsp::primitives::AllpassFilter::set_feedback ( float  g )

inline

Set feedback coefficient.

Parameters

g	Feedback gain, typically 0.5–0.7 for reverb diffusion

Definition at line 80 of file allpass_filter.hpp.

Referenced by sbl::dsp::modules::AlgoReverb< ScalePercent >::init(), and sbl::dsp::modules::AlgoReverb< ScalePercent >::process().

feedback()

float sbl::dsp::primitives::AllpassFilter::feedback ( ) const

inline

Current feedback coefficient.

Definition at line 83 of file allpass_filter.hpp.

reset()

void sbl::dsp::primitives::AllpassFilter::reset ( )

inline

Zero the buffer and reset write position.

Definition at line 86 of file allpass_filter.hpp.

Referenced by sbl::dsp::modules::AlgoReverb< ScalePercent >::reset().

delay()

uint32_t sbl::dsp::primitives::AllpassFilter::delay ( ) const

inline

Delay length in samples.

Definition at line 94 of file allpass_filter.hpp.

Referenced by init().

write_pos()

uint32_t sbl::dsp::primitives::AllpassFilter::write_pos ( ) const

inline

Current write position (for external tap reads)

Definition at line 97 of file allpass_filter.hpp.

Referenced by sbl::dsp::modules::AlgoReverb< ScalePercent >::process().

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

• src/sbl/dsp/primitives/allpass_filter.hpp