AudioWorkletProcessor type definition is missing

[teali]

TypeScript Version: 3.2.0-dev.201xxxxx

Search Terms: AudioWorkletProcessor

You guys have type definitions for AudioWorkletNode and such but missed the definition for AudioWorkletProcessor as per: https://webaudio.github.io/web-audio-api/#audioworkletprocessor

This is what I have for now:

interface AudioWorkletProcessor {
    readonly port: MessagePort;
    process(inputs: Float32Array[][], outputs: Float32Array[][], parameters: Map<string, Float32Array>): void;
}

declare var AudioWorkletProcessor: {
    prototype: AudioWorkletProcessor;
    new(options?: AudioWorkletNodeOptions): AudioWorkletProcessor;
}

Cheers

[weswigham]

PRs welcomed. You can find more information about contributing lib.d.ts fixes at https://github.com/Microsoft/TypeScript/blob/master/CONTRIBUTING.md#contributing-libdts-fixes.

[saschanaz]

AudioWorkletProcessor is a type only for AudioWorklet. Do we want to add dom.audioworklet.d.ts for this, or do we have to add all worklet types into dom.worker.d.ts?

Edit: types-web now supports audioworklet, so please try it if anyone needs it.

[weswigham]

@DanielRosenwasser you have a preference here?

[navelpluisje]

@teali It looks like the type of the parameters-parameter is not right. It should not be a Map. When typing it to a Map you need to use the get methode to get a value from the Map. In the specs they also are talking about a Map. But that has been clarified in the specs after I created a bug report for Chromium, because in Chromium the parameters-parameter is an Object.

Hongchan Choi (one of the authors of the spec) responded with the next comment:

The description says it is a "map", but it's actually an associative array, which is a JS object.

For a project I'm working on I added:

declare type AudioParamList = {
  [key: string]: Float32Array
}

This way typescript works great with the workletNode.

[saschanaz]

@navelpluisje parameters: Record<string, Float32Array> should also work.