Should there be a toggle screenshare action?

[youennf]

This came up when discussing w3c/mediacapture-extensions#39.
There is some UA UI that allows to mute/unmute display capture (Safari for instance) like available for camera and microphone.
Should MediaSession support this kind of action like it does for camera and microphone?

[youennf]

Given the recent progress on media session/media capture integration and given Safari UI allows to mute display capture, we will probably want to apply the same principle for display capture as for microphone and camera.
That could mean a toggledisplaycapture action and a setDisplayCaptureActive method.

@jan-ivar, @steimelchrome, thoughts?

[steimelchrome]

That seems reasonable to me

[eladalon1983]

Could you please help me understand how this will be used? The interaction between the browsers and Web app is unclear to me here.

[youennf]

It would be used for two things:

• Allow UA to let know the web page that the user clicked on OS/UA UI (Pip window e.g) and that getDisplayMedia tracks will get muted/unmuted
• Allow web page to try to unmute getDisplayMedia tracks.

[jan-ivar]

The Safari UI seems like a reasonable privacy feature. This API might help webpages disambiguate it from other reasons of mute.