- From: Stefan Håkansson LK <stefan.lk.hakansson@ericsson.com>
- Date: Fri, 10 Jan 2014 09:13:45 +0000
- To: Martin Thomson <martin.thomson@gmail.com>, "public-webrtc@w3.org" <public-webrtc@w3.org>
On 2014-01-10 02:39, Martin Thomson wrote: > Since we're required to enqueue all mutation operations on > RTCPeerConnection, I'm surprised that addStream, which has an > interdependency on createOffer/createAnswer, is synchronous. It's not > in Firefox, which means that it's not possible to report errors > effectively. I'm not sure what errors there could be. To me addStream just adds a MediaStream to the "local stream set"; that "local stream set" is what is considered at next createOffer/Answer. Likewise I'm not sure why it would have to be asynchronous. The content of the "local stream set" will only matter at createOffer/Answer, and I think there should be a synchronous part of those operations (they are underspecified currently) which says something like "let xxx be this RTCPeerConnection Object's local stream set; queue a task to perform the following steps; ...." - modeled from setLocal/Remote. I may be wrong... > > I'd like to suggest that we consider making addStream and removeStream > asynchronous like everything else. > > Also, I looked, but I can't see a concrete use for the constraints on > addStream. The algorithm forgets to even mention these. I agree to this. > > I'm not sure if local streams trigger onaddstream/onremovestream, I > don't think so, so I'd propose that we change the signatures of these > methods to: > > void addStream(MediaStream s, optional VoidFunction successCallback, > optional RTCPeerConnectionErrorCallback failureCallback); > void removeStream(MediaStream s, optional VoidFunction successCallback); > > In case you were wondering, remove should not be allowed to fail... > > I think that optional is OK here. That should help with backward > compat, and these aren't really critical, since you can test for > success/failure by probing. Plus, onnegotiationneeded tends to fire > if you do anything with the streams set. > >
Received on Friday, 10 January 2014 09:14:11 UTC