sbl::dsp::ModulatedDelayLine Class Reference

#include <modulated_delay_line.hpp>

Collaboration diagram for sbl::dsp::ModulatedDelayLine:

Public Member Functions
	ModulatedDelayLine (float *buffer, uint32_t max_delay)
	Construct with caller-provided buffer.
	ModulatedDelayLine ()=default
	Default constructor for deferred initialization (must call init() before use)
void	init (float *buffer, uint32_t max_delay)
	Initialize after default construction.
void	write (float sample)
	Write a sample to the delay line.
float	read (float delay_samples) const
	Read at fractional delay with linear interpolation.
float	read_cubic (float delay_samples) const
	Read at fractional delay with 4-point Hermite cubic interpolation.
void	process (const float *in, float *out, const float *delay, uint16_t frames)
	Block processing with per-sample modulated delay.
void	clear ()
	Zero all samples in the buffer and reset write position.
uint32_t	max_delay () const
	Maximum delay in samples (buffer size)
uint32_t	write_pos () const
	Current write position (for external tap reads)

Detailed Description

Definition at line 31 of file modulated_delay_line.hpp.

Constructor & Destructor Documentation

ModulatedDelayLine() [1/2]

sbl::dsp::ModulatedDelayLine::ModulatedDelayLine ( float *  buffer, uint32_t  max_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 ModulatedDelayLine)
max_delay	Maximum delay in samples (buffer size)

Definition at line 40 of file modulated_delay_line.hpp.

ModulatedDelayLine() [2/2]

sbl::dsp::ModulatedDelayLine::ModulatedDelayLine ( )

default

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

Member Function Documentation

clear()

void sbl::dsp::ModulatedDelayLine::clear ( )

inline

Zero all samples in the buffer and reset write position.

Definition at line 155 of file modulated_delay_line.hpp.

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

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init()

void sbl::dsp::ModulatedDelayLine::init ( float *  buffer, uint32_t  max_delay  )

inline

Initialize after default construction.

Parameters

buffer	Float buffer (must outlive the ModulatedDelayLine)
max_delay	Maximum delay in samples (buffer size)

Definition at line 51 of file modulated_delay_line.hpp.

References max_delay().

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

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max_delay()

uint32_t sbl::dsp::ModulatedDelayLine::max_delay ( ) const

inline

Maximum delay in samples (buffer size)

Definition at line 165 of file modulated_delay_line.hpp.

Referenced by init(), and sbl::widgets::proc::Delay::set_time().

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process()

void sbl::dsp::ModulatedDelayLine::process ( const float *  in, float *  out, const float *  delay, uint16_t  frames  )

inline

Block processing with per-sample modulated delay.

For each frame: writes in[i], reads at delay[i], outputs to out[i]. The delay array provides per-sample modulation (e.g., base delay + LFO). Uses linear interpolation.

in and out may alias (in-place processing is safe since each sample is read from in before write, and output is written after read).

Parameters

in	Input audio buffer
out	Output audio buffer
delay	Per-sample delay values in samples
frames	Number of frames to process

Definition at line 146 of file modulated_delay_line.hpp.

References read(), and write().

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read()

float sbl::dsp::ModulatedDelayLine::read ( float  delay_samples ) const

inline

Read at fractional delay with linear interpolation.

Parameters

delay_samples

Delay in samples (1.0 = most recently written sample). Clamped to [1.0, max_delay - 1].

Returns

Linearly interpolated sample

Definition at line 78 of file modulated_delay_line.hpp.

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

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read_cubic()

float sbl::dsp::ModulatedDelayLine::read_cubic ( float  delay_samples ) const

inline

Read at fractional delay with 4-point Hermite cubic interpolation.

Higher quality than linear — reduces artifacts for reverb tank modulation and pitch shifting. Uses samples at [d-1, d, d+1, d+2] around the read position.

Parameters

delay_samples

Delay in samples (1.0 = most recently written sample). Clamped to [2.0, max_delay - 2].

Returns

Hermite-interpolated sample

Definition at line 107 of file modulated_delay_line.hpp.

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

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write()

void sbl::dsp::ModulatedDelayLine::write ( float  sample )

inline

Write a sample to the delay line.

Advances the write pointer after storing. The write pointer always points to the next write location.

Definition at line 63 of file modulated_delay_line.hpp.

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

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write_pos()

uint32_t sbl::dsp::ModulatedDelayLine::write_pos ( ) const

inline

Current write position (for external tap reads)

Definition at line 168 of file modulated_delay_line.hpp.

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

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

• src/sbl/dsp/modulated_delay_line.hpp