Some words about glare

pull/10/head
David Baker 2014-09-12 14:24:56 +01:00
parent 8b28f7d14e
commit 09a59ce2d3
1 changed files with 27 additions and 1 deletions

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@ -1251,6 +1251,32 @@ Or a rejected call:
Calls are negotiated according to the WebRTC specification.
Glare
-----
This specification aims to address the problem of two users calling each other
at roughly the same time and their invites crossing on the wire. It is a far
better experience for the users if their calls are connected if it is clear
that their intention is to set up a call with one another.
In Matrix, calls are to rooms rather than users (even if those rooms may only
contain one other user) so we consider calls which are to the same room.
The rules for dealing with such a situation are as follows:
- If an invite to a room is received whilst the client is preparing to send an
invite to the same room, the client should cancel its outgoing call and
instead automatically accept the incoming call on behalf of the user.
- If an invite to a room is received after the client has sent an invite to the
same room and is waiting for a response, the client should perform a
lexicographical comparison of the call IDs of the two calls and use the
lesser of the two calls, aborting the greater. If the incoming call is the
lesser, the client should accept this call on behalf of the user.
The call setup should appear seamless to the user as if they had simply placed
a call and the other party had accepted. Thusly, any media stream that had been
setup for use on a call should be transferred and used for the call that
replaces it.
Profiles
========
.. NOTE::