fix(codec-selection) Check if disabled is already removed from sdp.

This should avoid unnecessary renegotiations if disabledCodec setting is present in config.js and should improve time to receive media when joining big calls.

modules/RTC/CodecSelection.js

@@ -130,7 +130,7 @@ export class CodecSelection {
                     ?? nonPreferredCodecs.find(codec => this._isCodecSupported(codec));
             }
         }
-        if (selectedCodec !== currentCodec || disabledCodec) {
+        if (selectedCodec !== currentCodec || !session?.peerconnection.isVideoCodecDisabled(disabledCodec)) {
             session.setVideoCodecs(selectedCodec, disabledCodec);
         }
     }

modules/RTC/TraceablePeerConnection.js

@@ -1848,6 +1848,22 @@ TraceablePeerConnection.prototype.getConfiguredVideoCodec = function() {
     return defaultCodec;
 };
 
+/**
+ * Checks if the client has negotiated not to receive video encoded using the given codec, i.e., the codec has been
+ * removed from the local description.
+ */
+TraceablePeerConnection.prototype.isVideoCodecDisabled = function(codec) {
+    const sdp = this.peerconnection.localDescription?.sdp;
+
+    if (!sdp) {
+        return false;
+    }
+    const parsedSdp = transform.parse(sdp);
+    const mLine = parsedSdp.media.find(m => m.type === MediaType.VIDEO);
+
+    return !mLine.rtp.find(r => r.codec === codec);
+};
+
 /**
  * Enables or disables simulcast for screenshare based on the frame rate requested for desktop track capture.
  *