960177 - Not receiving audio RTCP Sender Reports unless streams are added in both directions

Status: RESOLVED DUPLICATE of bug 859971

(Core :: WebRTC, defect)

Description

[Jan-Ivar Bruaroey [:jib] (needinfo? me)]

From Bug 947665 Comment 12:
> I think I've uncovered a bug: a new specstats.html is needed to get audio
> jitter reports.
>
> It appears we don't receive RTCP sender reports (w/audio jitter) unless a
> stream is added to BOTH PeerConnections involved.

Comment 1

[Jan-Ivar Bruaroey [:jib] (needinfo? me)]

Good: https://bugzilla.mozilla.org/attachment.cgi?id=8360065
Bad:  https://bugzilla.mozilla.org/attachment.cgi?id=8360538
Difference: line marked below

function connect() {
  pc1 = new RTCPeerConnection(null);
  pc2 = new RTCPeerConnection(null);
  pc1.addStream(mystream, streamConstraints());
  // Bug: a return stream seems needed or we get no RTCP audio jitter reports
> pc2.addStream(mystream, streamConstraints());
  log('PC1 creating offer');

Comment 2

[Jan-Ivar Bruaroey [:jib] (needinfo? me)]

Urg. Reverse that:
Bad: https://bugzilla.mozilla.org/attachment.cgi?id=8360065
Good:  https://bugzilla.mozilla.org/attachment.cgi?id=8360538

Comment 3

[Jan-Ivar Bruaroey [:jib] (needinfo? me)]

Breakpoint mxr.mozilla.org/mozilla-central/source/media/webrtc/trunk/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc#414

Comment 4

[Jan-Ivar Bruaroey [:jib] (needinfo? me)]

http://mxr.mozilla.org/mozilla-central/source/media/webrtc/trunk/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc#414

Comment 5

[Adam Roach [:abr]]

We've had this issue for a while, and fixing it is going to require some conduit refactoring. Duping to Bug 859971, although it's also related to Bug 861780.