Add facility for the opening page to add cloud paired screens as presentation targets

[mfoltzgoogle]

The assumption thus far is that the user agent is the only entity that can determine what screens are available for presentation. However, some sites will be able to access screens entirely based on interaction over the Internet, i.e. using XHR or WebSockets to a server, or perhaps WebRTC. Ideally these should be offered to the user as presentation targets alongside browser-discovered screens, so that the site author doesn't have to offer two distinct presentation mechanisms.

Considerations:

• The browser would only be responsible for offering the screen as a choice, and informing the app that it was chosen for presentation. It would not be responsible for any further interaction.
• These screens would need to be clearly and distinctly labeled as belonging to the site, and not part of the automatic discovery process by the browser.

I think this is a useful enhancement that would allow innovation and extension over browser-provided presentation capabilities.

[louaybassbouss]

Hi Mark, I like your proposal. I already experimented with something similar to this the implementation in [1] is purely JavaScript (sorry it is minified) and offers same Presentation API interfaces (not the latest version of the API). It communicates with our server via WebSockets. If you like to try some examples you can open [2] that acts as Display in a Browser of your choice (tested in chrome) and then the example applications [3..6] in the Browser on the same or any other device. you can replace the room value 123456 with any other value. please make sure that the room is the same in all URLs.
Your proposal will allow us to replace the selection dialog (we use confirm dialog :( ) with the native dialog provided by the UA.

[1] http://famium.fokus.fraunhofer.de/js/webscreens.all.min.js

[2] http://famium.fokus.fraunhofer.de/display.html#room=123456&name=Display1

[3] http://famium.fokus.fraunhofer.de/apps/helloworld/sender.html#room=123456

[4] http://famium.fokus.fraunhofer.de/apps/youtube/sender.html#room=123456

[5] http://famium.fokus.fraunhofer.de/apps/flickr/sender.html#room=123456

[6] http://famium.fokus.fraunhofer.de/apps/slides/sender.html#room=123456

[tidoust]

For reference, see discussion at TPAC

[mfoltzgoogle]

Labeling for possible followup at TPAC.