Give CallFeed the capability to emit on volume changes

[SimonBrandner]

Type: enhancement
For matrix-org/matrix-react-sdk#6639

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To be transparent, I have no idea what I am doing but it seems to work 😅

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Here's what your changelog entry will look like:

✨ Features

• Give CallFeed the capability to emit on volume changes (#1865). Contributed by SimonBrandner.

[dbkr]

Nice! It might be nice to actually shift more of this towards the js-sdk side and have it emit active-speaker events so the js-sdk handles the threshold etc rather than just throwing volume events at the app. Also unsure if we'll want to highlight all people who are actively speaking or just decide which person is the active speaker (like jitsi does). In a way I sort of like highlighting all the people we think are speaking, but probably a product call.

[SimonBrandner]

It might be nice to actually shift more of this towards the js-sdk side and have it emit active-speaker events so the js-sdk handles the threshold etc rather than just throwing volume events at the app.

It was intentional in case some other app building on the js-sdk can access the volume directly but we can emit both volume_changed and speaking speaking and solve the problem that way

Also unsure if we'll want to highlight all people who are actively speaking or just decide which person is the active speaker (like jitsi does). In a way I sort of like highlighting all the people we think are speaking, but probably a product call.

Agreed, I would also prefer highlighting all speaking users. Guessing the main speaker feels a bit useless now and it doesn't feel like an important thing to have. We can always add it in the future. Figma also seems to agree: When a user speaks, its videofeed should be highlighted in Accent colour