[AUDIO_WORKLET] Using custom AudioWorkletProcessors

I'm working on a C++ library, that I want users to be able to use in AudioWorkletProcessors.
Right now, I implemented it using [this guide](https://emscripten.org/docs/api_reference/wasm_audio_worklets.html).
However, I would love to customize how the process function in my Wasm module is called from within the AudioNode.
Best case would be if this can be done on a per-AudioNode basis.

What is the most feasible way to do this? (It's fine if it's slightly hacky)