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Re: Another API issue: addStream has no callbacks

From: Stefan Håkansson LK <stefan.lk.hakansson@ericsson.com>
Date: Tue, 26 Feb 2013 07:33:28 +0100
Message-ID: <512C5738.2040300@ericsson.com>
To: public-webrtc@w3.org
On 2013-02-25 22:13, Adam Roach wrote:
> Sometimes it seems like I'm screaming into the void by posting the
> issues we're actually running into implementing this stuff, but here's
> another problem we've uncovered with the currently defined API:

Sorry to hear that you feel you're screaming into the void. If there are 
other issues related to implementation you have raised but feel weren't 
addressed, please send a new mail to the list.

> addStream() can plausibly fail, and some of those failures can occur
> asynchronously. Examples of such failures include exhausting encoders of
> the indicated type (e.g., I might have a device with only one hardware
> video encoder).

As said by Harald and Justin already, when we moved from ROAP to JSEP, 
addStream also stopped doing anything (except telling the PeerConnection 
that the added stream would be considered at next 
createOffer/Answer+setLocal), I think that is the reason why we've 
considered that there would be no errors.

If you have discovered that this does not hold, we should redesign. Can 
you elaborate a bit more on the possible errors?

Also, we have the situation when "addTrack" is done to a MediaStream 
that is already attached to one or more PeerConnections. I figure that 
similar errors could happen here, and we need to handle them as well.

Received on Tuesday, 26 February 2013 06:49:18 UTC

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