fix(ReceiverVideoController): Cache the new receiver constraints.

modules/qualitycontrol/ReceiveVideoController.js

@@ -294,6 +294,10 @@ export class ReceiveVideoController {
 
         const constraintsChanged = this._receiverVideoConstraints.updateReceiverVideoConstraints(constraints);
 
-        constraintsChanged && this._rtc.setNewReceiverVideoConstraints(constraints);
+        if (constraintsChanged) {
+            this._lastN = constraints.lastN ?? this._lastN;
+            this._selectedEndpoints = constraints.selectedEndpoints ?? this._selectedEndpoints;
+            this._rtc.setNewReceiverVideoConstraints(constraints);
+        }
     }
 }

package-lock.json

@@ -609,6 +609,24 @@
         "@babel/plugin-syntax-json-strings": "^7.0.0"
       }
     },
+    "@babel/plugin-proposal-nullish-coalescing-operator": {
+      "version": "7.13.8",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-nullish-coalescing-operator/-/plugin-proposal-nullish-coalescing-operator-7.13.8.tgz",
+      "integrity": "sha512-iePlDPBn//UhxExyS9KyeYU7RM9WScAG+D3Hhno0PLJebAEpDZMocbDe64eqynhNAnwz/vZoL/q/QB2T1OH39A==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.13.0",
+        "@babel/plugin-syntax-nullish-coalescing-operator": "^7.8.3"
+      },
+      "dependencies": {
+        "@babel/helper-plugin-utils": {
+          "version": "7.13.0",
+          "resolved": "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.13.0.tgz",
+          "integrity": "sha512-ZPafIPSwzUlAoWT8DKs1W2VyF2gOWthGd5NGFMsBcMMol+ZhK+EQY/e6V96poa6PA/Bh+C9plWN0hXO1uB8AfQ==",
+          "dev": true
+        }
+      }
+    },
     "@babel/plugin-proposal-object-rest-spread": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.0.0.tgz",
@@ -738,6 +756,23 @@
         "@babel/helper-plugin-utils": "^7.0.0"
       }
     },
+    "@babel/plugin-syntax-nullish-coalescing-operator": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-nullish-coalescing-operator/-/plugin-syntax-nullish-coalescing-operator-7.8.3.tgz",
+      "integrity": "sha512-aSff4zPII1u2QD7y+F8oDsz19ew4IGEJg9SVW+bqwpwtfFleiQDMdzA/R+UlWDzfnHFCxxleFT0PMIrR36XLNQ==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.8.0"
+      },
+      "dependencies": {
+        "@babel/helper-plugin-utils": {
+          "version": "7.13.0",
+          "resolved": "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.13.0.tgz",
+          "integrity": "sha512-ZPafIPSwzUlAoWT8DKs1W2VyF2gOWthGd5NGFMsBcMMol+ZhK+EQY/e6V96poa6PA/Bh+C9plWN0hXO1uB8AfQ==",
+          "dev": true
+        }
+      }
+    },
     "@babel/plugin-syntax-object-rest-spread": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-object-rest-spread/-/plugin-syntax-object-rest-spread-7.0.0.tgz",

package.json

@@ -37,6 +37,7 @@
     "@babel/core": "7.5.5",
     "@babel/plugin-proposal-class-properties": "7.1.0",
     "@babel/plugin-proposal-export-namespace-from": "7.0.0",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "7.13.8",
     "@babel/plugin-proposal-optional-chaining": "7.2.0",
     "@babel/plugin-transform-flow-strip-types": "7.0.0",
     "@babel/preset-env": "7.1.0",

webpack-shared-config.js

@@ -59,7 +59,8 @@ module.exports = {
                     '@babel/plugin-transform-flow-strip-types',
                     '@babel/plugin-proposal-class-properties',
                     '@babel/plugin-proposal-optional-chaining',
-                    '@babel/plugin-proposal-export-namespace-from'
+                    '@babel/plugin-proposal-export-namespace-from',
+                    '@babel/plugin-proposal-nullish-coalescing-operator'
                 ]
             },
             test: /\.js$/