wasmlets - wavelet transforms for the web

The goal of wasmlets is to provide fast wavelet decomposition and reconstruction functions for use from a JavaScript (or Typescript) environment, by compiling existing libraries to WebAssembly (wasm).

Currently, we are using the wavelib C library as the underlying implementation.

How fast is it? See flatironinstitute/web-wavelets-benchmarking for comparisons (more always welcome!)

Installation

npm i wasmlets

Use

Before calling anything else, you must await the init() function to load the WebAssembly module.

Then there are two functions, inspired by the API from PyWavelets:

function wavedec(
  data: Float64Array,
  wavelet: Wavelet,
  mode?: Mode,
  level?: number | undefined,
): Float64Array[];
function waverec(
  coeffs: Float64Array[],
  wavelet: Wavelet,
  mode?: Mode,
): Float64Array;

Building

You will need both Emscripten and yarn installed.

You can then run make followed by yarn build.