Module transform 

Wavelet and color transforms (DWT 5/3, 9/7, RCT, ICT).

Port of ojph_transform.h/cpp and ojph_colour.h/cpp.

Structs

ColourTransformFns

Runtime-dispatched colour transform function table.

IrvLiftingStep

Irreversible lifting step parameters (9/7 DWT).

ParamAtk

Arbitrary Transformation Kernel parameters.

RevLiftingStep

Reversible lifting step parameters (5/3 DWT).

WaveletTransformFns

Runtime-dispatched wavelet transform function table.

Enums

LiftingStep

A single lifting step — either reversible (integer) or irreversible (float).

Functions

colour_fns

Returns a reference to the lazily-initialized colour function table.

init_colour_transform_functions

Initializes colour transform function pointers (called once, lazily).

init_wavelet_transform_functions

Initializes wavelet transform function pointers (called once, lazily).

wavelet_fns

Returns a reference to the lazily-initialized wavelet function table.

Type Aliases

IctFn

ICT forward/backward (float buffers).

IrvConvertToFloatFn

Irreversible: integer → float dequantization.

IrvConvertToIntegerFn

Irreversible: float → integer quantization.

IrvHorzAnaFn

Irreversible horizontal analysis.

IrvHorzSynFn

Irreversible horizontal synthesis.

IrvVertStepFn

Irreversible vertical lifting step (same shape as reversible).

IrvVertTimesKFn

Multiply line by normalization constant K.

RctFn

RCT forward/backward (integer buffers).

RevConvertFn

Reversible sample conversion (integer shift).

RevHorzAnaFn

Reversible horizontal analysis (forward DWT, split into low/high).

RevHorzSynFn

Reversible horizontal synthesis (inverse DWT, merge low/high).

RevVertStepFn

Reversible / irreversible vertical lifting step.