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w3c / mediacapture-main

Media Capture and Streams specification (aka getUserMedia)
https://w3c.github.io/mediacapture-main/
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Explanation of constraints in GUM call #113

Closed dontcallmedom closed 9 years ago

dontcallmedom commented 9 years ago

_Initially reported in bugzilla by Cullen Jennings 2014-05-18 13:47:59 UTC_

step 4 of GMD is really hard to understand what is going on an why

The whole algorithm is hard to convince people it is correct because it is hard to understand what is going on. Prefer to see it rewritten in style of Constrainable section.

In gum constructor around step 8.5, it seems wrong as the advanced is not a set of key -value pairs but is an array of sets of k/v pairs

Step 10 in gum constructor is wacky - what is this for? need to be more specific than randomly fail if you feel like it

in step 11 gum constructor, should be clear that call MSUT not return things that are not in the finalSet

dontcallmedom commented 9 years ago

comment by Harald Alvestrand 2014-07-01 08:34:36 UTC

Step 8 (constraining) needs to be replaced with a reference to the constrainable pattern's algorithm + some text that explains the unique properties of the algorithm in this context (that it's applied to multiple devices at the same time, and results in picking a device).

I think step 10 (Optionally jump to PermissionFailure) was intended to capture the case of a stored denied access. ("No, and don't permit the page to ask again"). The language is quite vague, and can be improved.

In step 11, it does say "MUST include ... from the finalSet". I don't think we an make it much clearer without repeating ourselves.

dontcallmedom commented 9 years ago

Comment by Harald Alvestrand 2014-11-20 15:41:02 UTC

PR #28 is trying to deal with this section.

dontcallmedom commented 9 years ago

now that PR #122 (replacement of PR #28) is merged, can this be closed? @fluffy

alvestrand commented 9 years ago

Closing. (Fluffy's on vacation this week)