Add updateLocalUsermediaStream()

Signed-off-by: Šimon Brandner <[email protected]>

Author: SimonBrandner

src/webrtc/call.ts

@@ -1072,6 +1072,53 @@ export class MatrixCall extends EventEmitter {
         }
     }
 
+    /**
+     * Replaces/adds the tracks from the passed stream to the localUsermediaStream
+     * @param {MediaStream} stream to use a replacement for the local usermedia stream
+     */
+    public async updateLocalUsermediaStream(stream: MediaStream): Promise<void> {
+        const callFeed = this.localUsermediaFeed;
+        const micShouldBeMuted = callFeed.isAudioMuted() || this.remoteOnHold;
+        const vidShouldBeMuted = callFeed.isVideoMuted() || this.remoteOnHold;
+        setTracksEnabled(stream.getAudioTracks(), !micShouldBeMuted);
+        setTracksEnabled(stream.getVideoTracks(), !vidShouldBeMuted);
+        callFeed.setNewStream(stream);
+
+        const newSenders = [];
+
+        for (const track of stream.getTracks()) {
+            const oldSender = this.usermediaSenders.find((sender) => sender.track?.kind === track.kind);
+            let newSender: RTCRtpSender;
+
+            if (oldSender) {
+                logger.info(
+                    `Replacing track (` +
+                    `id="${track.id}", ` +
+                    `kind="${track.kind}", ` +
+                    `streamId="${stream.id}", ` +
+                    `streamPurpose="${callFeed.purpose}"` +
+                    `) to peer connection`,
+                );
+                await oldSender.replaceTrack(track);
+                newSender = oldSender;
+            } else {
+                logger.info(
+                    `Adding track (` +
+                    `id="${track.id}", ` +
+                    `kind="${track.kind}", ` +
+                    `streamId="${stream.id}", ` +
+                    `streamPurpose="${callFeed.purpose}"` +
+                    `) to peer connection`,
+                );
+                newSender = this.peerConn.addTrack(track, stream);
+            }
+
+            newSenders.push(newSender);
+        }
+
+        this.usermediaSenders = newSenders;
+    }
+
     /**
      * Set whether our outbound video should be muted or not.
      * @param {boolean} muted True to mute the outbound video.