rewrite with WebCodecs API (low-level access to frames and audio samples)

[WofWca]

Just found out about it, damn

https://w3c.github.io/webcodecs/#audiodecoder-interface
https://developer.mozilla.org/en-US/docs/Web/API/WebCodecs_API

I haven't checked how it all works, just read the description. Is it the proper way to write this extension?

[WofWca]

I checked this out a bit. What I think we want is AudioData.copyTo

But I'm just not sure when this can be useful for us, except for potential performance gain.
If you think about HTMLVideoElement, all it has is src and srcObject, and we can already handle all the cases except for MediaSourceHandle for the cloning algorithm.