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DeviceID - reserved values, how to express? (#173)

From: Harald Alvestrand <harald@alvestrand.no>
Date: Fri, 12 Jun 2015 10:28:12 +0200
Message-ID: <557A981C.30909@alvestrand.no>
To: "public-media-capture@w3.org" <public-media-capture@w3.org>
We have a bug open on DeviceID:

https://github.com/w3c/mediacapture-main/issues/173

It notes that the Audio Output API
(http://w3c.github.io/mediacapture-output/) has defined a couple of
predefined device IDs
(http://w3c.github.io/mediacapture-output/#predefined-ids):

"id-multimedia" and "id-communications".

This mixes badly with the concept of randomly generated device IDs -
we're simply not guaranteed that clashes can always be avoided.

Four easy options:

- Make randomly generated DeviceID always longer than 17 characters, and
note that predefined values have to be shorter than this
- State that randomly generated DeviceIDs always start with a number (or
anything that doesn't spell "id-") and state that predefined DeviceIDs
have to start with one of the "forbidden" strings
- Create a new concept of "random device ID or predefined device ID",
and put a wrapper around them to distinguish between the two
- Drop the idea of predefined DeviceIDs and ban it forevermore.

We need to pick one, and we need to put it inside Media Capture and
Streams, I'm afraid.

What makes the most sense?

    Harald
Received on Friday, 12 June 2015 08:28:42 UTC

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