Multiple presentation devices

[obeletski]

Media flinging use case requires Presentation API to support multiple presentation devices at the same time [1].
Specification has to be updated to reflect that in different sections:

• new requirement to be added
• methods for starting/joining session to support startup of a session on multiple screens
• screen selection algorithm and possibly UI to indicated that screen is already in use

[1] http://w3c.github.io/presentation-api/#use-cases-0

[obeletski]

Actually, two issue related the same subject already exist. #1 is closed now and #40 about the screen availability still open.

[anssiko]

The proposed resolution for #40 from the F2F seem to suggest no normative changes to the spec, if I'm not mistaken. The "Multiple presentations per controller" requirement was added in #95, and states "a single controller may be able to send content to multiple displays at once, and a single display may be able to host multiple presentations at once". We revised the terminology in #95, and controller is a shorthand for the controlling browsing context (earlier it was called opening browsing context).

@obeletski Do these clarifications address your issue? Feel free to clarify the flinging use case by submitting a proposal to the Review the use cases and requirements.

[mounirlamouri]

I think this is a duplicate of #40. Closing.