From 148c49d253c53a3dd2ae0a05aaa06516d2c605df Mon Sep 17 00:00:00 2001
From: Juliusz Chroboczek <jch@irif.fr>
Date: Sun, 20 Mar 2022 21:52:24 +0100
Subject: [PATCH] Enable simulcast on Firefox.

Firefox uses a non-standard protocol for simulcast, which has been
supported by Pion for a while now.  Enable simulcast in Firefox.
---
 static/galene.js | 21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/static/galene.js b/static/galene.js
index b6fef25..86c0882 100644
--- a/static/galene.js
+++ b/static/galene.js
@@ -855,11 +855,9 @@ async function setSendParameters(c, bps, simulcast) {
         if(!s.track || s.track.kind !== 'video')
             continue;
         let p = s.getParameters();
-        if(!p.encodings)
-            p.encodings = [{}];
-        if((!simulcast && p.encodings.length != 1) ||
+        if((!p.encodings ||
+            !simulcast && p.encodings.length != 1) ||
            (simulcast && p.encodings.length != 2)) {
-            // change the simulcast envelope
             await replaceUpStream(c);
             return;
         }
@@ -1213,15 +1211,12 @@ function setUpStream(c, stream) {
             streams: [stream],
             sendEncodings: encodings,
         });
-        if(t.kind === 'video') {
-            let p = tr.sender.getParameters();
-            if(!p.encodings) {
-                // Firefox workaround
-                updateSettings({simulcast: 'off'});
-                reflectSettings();
-                p.encodings = [encodings[0]];
-                tr.sender.setParameters(p);
-            }
+
+        // Firefox workaround
+        let p = tr.sender.getParameters();
+        if(!p.encodings || p.encodings.length != encodings.length) {
+            p.encodings = encodings;
+            tr.sender.setParameters(p);
         }
     }