From aca3bab23891b2b3cdfd45fc9c854cddedd8fe0f Mon Sep 17 00:00:00 2001
From: Alexey Khit <alexey.khit@gmail.com>
Date: Sun, 18 Dec 2022 22:38:44 +0300
Subject: [PATCH] Fix Firefox WebRTC support

---
 www/video-rtc.js | 5 +++--
 www/webrtc.html  | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/www/video-rtc.js b/www/video-rtc.js
index dddeaed0..cd5c8a1e 100644
--- a/www/video-rtc.js
+++ b/www/video-rtc.js
@@ -422,7 +422,8 @@ class VideoRTC extends HTMLElement {
         video2.addEventListener("loadeddata", () => {
             console.debug("VideoRTC.video.loadeddata", video2.readyState, pc.connectionState);
 
-            if (pc.connectionState === "connected" || pc.connectionState === "connecting") {
+            // Firefox doesn't support pc.connectionState
+            if (pc.connectionState === "connected" || pc.connectionState === "connecting" || !pc.connectionState) {
                 // Video+Audio > Video, H265 > H264, Video > Audio, WebRTC > MSE
                 let rtcPriority = 0, msePriority = 0;
 
@@ -498,7 +499,7 @@ class VideoRTC extends HTMLElement {
         this.onmessage["webrtc"] = msg => {
             switch (msg.type) {
                 case "webrtc/candidate":
-                    pc.addIceCandidate({candidate: msg.value, sdpMid: ""}).catch(() => console.debug);
+                    pc.addIceCandidate({candidate: msg.value, sdpMid: "0"}).catch(() => console.debug);
                     break;
                 case "webrtc/answer":
                     pc.setRemoteDescription({type: "answer", sdp: msg.value}).catch(() => console.debug);
diff --git a/www/webrtc.html b/www/webrtc.html
index 9ab660bc..ca6bbab0 100644
--- a/www/webrtc.html
+++ b/www/webrtc.html
@@ -48,7 +48,7 @@
             console.debug('ws.onmessage', msg);
 
             if (msg.type === 'webrtc/candidate') {
-                pc.addIceCandidate({candidate: msg.value, sdpMid: ''});
+                pc.addIceCandidate({candidate: msg.value, sdpMid: '0'});
             } else if (msg.type === 'webrtc/answer') {
                 pc.setRemoteDescription({type: 'answer', sdp: msg.value});
             }