1692257 - Add more audio IO information to about:webrtc

Status: NEW

(Core :: WebRTC: Audio/Video, enhancement, P3)

Description

[Paul Adenot (:padenot)]

It's really hard for Firefox users to debug a microphone or speaker problem, because it's very opaque.

Some OSes have a vu meter for input and output, we should have the same and send an rms or something of the signals to a global location and display a vu meter in about:webrtc.

This would allow us to know if it's the OS having an issue or a config problem (volume too low, etc.), Firefox being buggy or the website doing something wrong.

Having this capability would also allow showing a little volume icon when choosing an audio device in the prompt. I could be a nice way to help people find which mic is which. Quite a few audio software do that.