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A new world: "Multi-SFU" media transport#3512

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BillCarsonFr merged 157 commits intolivekitfrom
voip-team/rebased-multiSFU
Oct 23, 2025
Merged

A new world: "Multi-SFU" media transport#3512
BillCarsonFr merged 157 commits intolivekitfrom
voip-team/rebased-multiSFU

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@toger5 toger5 commented Sep 23, 2025 •
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This PR is a big step up in how we treat the ownership of the media connection in a call. Instead of using a unsuited "centralised" solution to decide on what SFU will be used for the call this PR allows everyone to own their connection and still have a call with all participants without a system to choose one specific SFU. Apart from this being the much better suited appraoch fro a decentralised system there are the following real word benefits:

  • NO sudden reconnections mid call if someone disconnects.
  • NO unpredictable performance in the same room (because someone else started a call)
  • Better performance since calls can be spread over multiple SFU's
  • Clear Connection data ownership and clean up of the related code, allowing for simpler adoption of other SFU concepts (full mesh, cascading)

toger5 and others added 30 commits September 19, 2025 17:50
@toger5
temp
9011ae4 
Signed-off-by: Timo K <[email protected]>
@robintown @toger5
Fix some errors in CallViewModel
35319dd
@robintown @toger5
Fix crash?
d9b6302
@toger5
initial compiling version
376a4b4 
Signed-off-by: Timo K <[email protected]>
@robintown @toger5
Fix makeFocus
c6e8c94
@robintown @toger5
Make it actually join the session
cb91f1a
@toger5
first video!
7b88420 
Signed-off-by: Timo K <[email protected]>
@toger5
publish audio in remote rooms
a10489d 
Signed-off-by: Timo K <[email protected]>
@toger5
add comment
6bdfd7f 
Signed-off-by: Timo K <[email protected]>
@toger5
introduce publishingParticipants$
55b46b3 
Signed-off-by: Timo K <[email protected]>
@toger5
add local storage + more readable + remoteParticipants + use publishi…
8ffb360 
…ngParticipants

Signed-off-by: Timo K <[email protected]>
@toger5
add logging
33bc78e 
Signed-off-by: Timo K <[email protected]>
@toger5
make it work
a617a92 
Signed-off-by: Timo K <[email protected]>
@toger5
refactor connnection class
e4a54e3 
Signed-off-by: Timo K <[email protected]>
@toger5
refactor connection
802ebf8 
Signed-off-by: Timo K <[email protected]>
@toger5
lots of work. noone knows if it works.
598371b 
Signed-off-by: Timo K <[email protected]>
@robintown @toger5
Add my own local storage SFU config stuff too
02f4c73
@robintown @toger5
Import unfinished mute states refactor
d46fe55
@toger5
temp before holiday
386dc6c 
Signed-off-by: Timo K <[email protected]>
@robintown @toger5
All my Friday work. Demoable!
e08f16f
@toger5
one e2ee worker per session
c809873 
Signed-off-by: Timo K <[email protected]>
@toger5
enable encryption in per sender case
cc870c3 
Signed-off-by: Timo K <[email protected]>
@toger5
make audio work
38d78dd 
Signed-off-by: Timo K <[email protected]>
@toger5
move leave logic into view model
ccfd32c 
Signed-off-by: Timo K <[email protected]>
@toger5
dont throw disconnected error at start of the call
41e152f 
Signed-off-by: Timo K <[email protected]>
@toger5
start fixing CallViewModel tests.
d9fe310 
Signed-off-by: Timo K <[email protected]>
@toger5
remove todo from matrix audio renderer
02f23e2 
Signed-off-by: Timo K <[email protected]>
@toger5
add todo comments and who works on them
dddda70 
Signed-off-by: Timo K <[email protected]>
@toger5
TODO: settings modal with multiple connections
8bf2489 
Signed-off-by: Timo K <[email protected]>
@toger5
Make track processor work
78e9521 
Signed-off-by: Timo K <[email protected]>
@robintown robintown changed the title [WIP] Voip team/rebased multi sfu Multi-SFU media transport Oct 23, 2025
fkwp
fkwp approved these changes Oct 23, 2025
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lgtm

@BillCarsonFr BillCarsonFr merged commit f99d01f into livekit Oct 23, 2025
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@toger5 toger5 changed the title Multi-SFU media transport A new world: "Multi-SFU" media transport Dec 8, 2025
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@fkwp fkwp fkwp approved these changes

@AndrewFerr AndrewFerr Awaiting requested review from AndrewFerr AndrewFerr is a code owner automatically assigned from element-hq/element-call-reviewers

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@toger5 @fkwp @BillCarsonFr @robintown