Sinc Interpolation

Structs

struct SincInterpolator

Sinc Interpolation of List[Float64]s.

Struct for high-quality audio resampling using sinc interpolation. This struct precomputes a sinc table and provides methods for performing sinc interpolation on audio data with adjustable ripples and table size. It is used in Osc for resampling oscillator signals.

As a user, you won't need to interact with this struct directly. Instead use the ListInterpolator struct.

Traits: AnyType, Copyable, ImplicitlyDestructible, Movable

SincInterpolator Parameters

Name	Type	Default	Description
ripples	Int	4	Number of ripples in the sinc function, affecting interpolation quality.
power	Int	14	Power of two determining the size of the sinc table (table_size = 2^power).

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SincInterpolator Functions

struct SincInterpolator . fn init

fn init Signature

__init__(out self)

fn init Returns : Self

Static Method

This is a static method.

struct SincInterpolator . fn sinc_interp

Perform sinc interpolation on the given data at the specified current index.

fn sinc_interp Signature

sinc_interp[num_chans: Int, bWrap: Bool = True, mask: Int = 0](self, data: Span[SIMD[DType.float64, num_chans], origin], current_index: Float64, prev_index: Float64) -> SIMD[DType.float64, num_chans]

fn sinc_interp Parameters

Name	Type	Default	Description
num_chans	Int	—	The number of channels in the audio data.
bWrap	Bool	True	Whether to wrap around at the end of the buffer when an index exceeds the buffer length.
mask	Int	0	Mask for wrapping indices if bWrap is True.

fn sinc_interp Arguments

Name	Type	Default	Description
data	Span	—	The audio data (Buffer channel) to interpolate.
current_index	Float64	—	The current fractional index for interpolation.
prev_index	Float64	—	The previous index. Needed to calculate the slope.

fn sinc_interp Returns : SIMD

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