Disable force_layer and re-enable auto padding

[kekkokk]

Description
It disable the previously forced layers of subscribed simulcast and re-enable the auto padding algo.

[] It needs and includes Unit Tests

Changes in Client or Server public APIs
if subscribedStream._setQualityLayer('auto') is passed, it switch to auto.

[] It includes documentation for these changes in /doc.

[jcague]

Really nice! I really like the idea of disabling forced layers, and I like this proposal.

But I don't like the change in the client API though, it gives developers the next wrong ideas IMO:

• _setQualityLayer('auto', 2) it seems like we're setting automating spatial layer switching while forcing the temporal layer.
• _setQualityLayer(0, 'auto') not sure whether it will work
• `_setQualityLayer('auto', 'auto') not sure whether it will work or not

Just a proposal: should we change the API to have two methods to something like this?
_setStaticQualityLayer(1,2)
_setDynamicQualityLayer()
I haven't thought them a lot, but it's just to give you an idea.

[kekkokk]

Ok, I like your observation.
I split in two separate functions as you suggested but I didn't change nothing in the doc since neither _setQualityLayer was mentioned. I think you would like to keep it private since it is well tested.

[kekkokk]

It also would be nice to have a preference to set the preferred switch.
For example I'd prefer to have always an higher temporal layer instead of spatial.
Id prefer to see smooth than neat.
You think it would be possible with low effort?

[jcague]

agree, but that's a different API, that would be also nice to have limits on the max resolution and/or framerates each subscriber can receive.

[kekkokk]

updated with new Stream.js

[kekkokk]

!up please merge

[jcague]

👍 thanks!