deluge::dsp::reverb::FxEngine Class Reference

Collaboration diagram for deluge::dsp::reverb::FxEngine:

Classes
class	Context
struct	DelayLine
struct	AllPass

Public Member Functions
	FxEngine (std::span< float > signal, std::array< float, 2 > lfo_freqs)
void	Clear ()
void	SetLFOFrequency (LFOIndex index, float frequency)
void	Advance ()
float &	at (size_t index)
float	LFO (LFOIndex lfo)

Static Public Member Functions
static void	ConstructTopology (FxEngine &e, std::initializer_list< DelayLine * > delays)

Static Public Attributes
static constexpr float	kLFOStride = 32.0f

Private Member Functions
void	StepLFO ()

Private Attributes
int32_t	write_ptr_ = 0
std::span< float >	buffer_
DualCosineOscillator	lfo_
size_t	mask

Member Function Documentation

LFO()

float deluge::dsp::reverb::FxEngine::LFO ( LFOIndex lfo )

inline

Reads the current value; stepping is Advance()'s job, so that a topology with several modulated delay lines still only advances the oscillators once per frame.

Member Data Documentation

kLFOStride

float deluge::dsp::reverb::FxEngine::kLFOStride = 32.0f

staticconstexpr

The LFOs only step once every 32 frames, so a configured frequency has to be scaled up to compensate. Skip this and the normalised frequency stays small enough that the approximate cosine's 2 - 32f^2 coefficient rounds to exactly 2.0f – at which point both lanes collapse onto one much slower oscillation and the modulation stops being two independent voices.

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

• src/deluge/dsp/reverb/fx_engine.hpp