fix(device-selection): Default device change.

conference.js

         const promises = [];
         const audioWasMuted = this.isLocalAudioMuted();
         const videoWasMuted = this.isLocalVideoMuted();
+        const requestedInput = {
+            audio: Boolean(newDevices.audioinput),
+            video: Boolean(newDevices.videoinput)
+        };
 
         if (typeof newDevices.audiooutput !== 'undefined') {
             const { dispatch } = APP.store;
             promises.push(setAudioOutputPromise);
         }
 
+        // Handles the use case when the default device is changed (we are always stopping the streams because it's
+        // simpler):
+        // If the default device is changed we need to first stop the local streams and then call GUM. Otherwise GUM
+        // will return a stream using the old default device.
+        if (requestedInput.audio && this.localAudio) {
+            this.localAudio.stopStream();
+        }
+
+        if (requestedInput.video && this.localVideo) {
+            this.localVideo.stopStream();
+        }
+
         promises.push(
             mediaDeviceHelper.createLocalTracksAfterDeviceListChanged(
                     createLocalTracksF,
                     });
 
                     return Promise.all(muteSyncPromises)
-                        .then(() => Promise.all(
-                            this._setLocalAudioVideoStreams(tracks)));
+                        .then(() =>
+                            Promise.all(Object.keys(requestedInput).map(mediaType => {
+                                if (requestedInput[mediaType]) {
+                                    const useStream
+                                        = mediaType === 'audio'
+                                            ? this.useAudioStream.bind(this)
+                                            : this.useVideoStream.bind(this);
+
+                                    // Use the new stream or null if we failed to obtain it.
+                                    return useStream(tracks.find(track => track.getType() === mediaType) || null);
+                                }
+
+                                return Promise.resolve();
+                            })));
                 })
                 .then(() => {
                     // Log and sync known mute state.

modules/devices/mediaDeviceHelper.js

         // If we have new audio device and permission to use it was granted
         // (label is not an empty string), then we will try to use the first
         // available device.
-        if (availableAudioInputDevices.length
+        if (selectedAudioInputDevice && selectedAudioInputDeviceId) {
+            return selectedAudioInputDeviceId;
+        } else if (availableAudioInputDevices.length
             && availableAudioInputDevices[0].label !== '') {
             return availableAudioInputDevices[0].deviceId;
         }
         // If we have new video device and permission to use it was granted
         // (label is not an empty string), then we will try to use the first
         // available device.
-        if (availableVideoInputDevices.length
+        if (selectedVideoInputDevice && selectedVideoInputDeviceId) {
+            return selectedVideoInputDeviceId;
+        } else if (availableVideoInputDevices.length
             && availableVideoInputDevices[0].label !== '') {
             return availableVideoInputDevices[0].deviceId;
         }
             localAudio) {
         return {
             audioinput: getNewAudioInputDevice(newDevices, localAudio),
-            videoinput: !isSharingScreen
-                && getNewVideoInputDevice(newDevices, localVideo),
+            videoinput: isSharingScreen ? undefined : getNewVideoInputDevice(newDevices, localVideo),
             audiooutput: getNewAudioOutputDevice(newDevices)
         };
     },
         /**
          *
          */
-        function createAudioTrack(showError) {
+        function createAudioTrack(showError = true) {
             return (
                 createLocalTracks({
                     devices: [ 'audio' ],
         /**
          *
          */
-        function createVideoTrack(showError) {
+        function createVideoTrack(showError = true) {
             return (
                 createLocalTracks({
                     devices: [ 'video' ],

package-lock.json

         "blueimp-md5": "^2.10.0",
         "json3": "^3.3.2",
         "lodash": "^4.17.4",
-        "ua-parser-js": "github:amplitude/ua-parser-js#ed538f1"
+        "ua-parser-js": "github:amplitude/ua-parser-js#ed538f16f5c6ecd8357da989b617d4f156dcf35d"
       },
       "dependencies": {
         "ua-parser-js": {
         },
         "ansi-regex": {
           "version": "2.1.1",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "aproba": {
           "version": "1.2.0",
         },
         "balanced-match": {
           "version": "1.0.0",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
-          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
         },
         "code-point-at": {
           "version": "1.1.0",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "concat-map": {
           "version": "0.0.1",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "console-control-strings": {
           "version": "1.1.0",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "core-util-is": {
           "version": "1.0.2",
         },
         "inherits": {
           "version": "2.0.3",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "ini": {
           "version": "1.3.5",
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
-          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
-          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
         },
         "minimist": {
           "version": "0.0.8",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
-          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
-          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
         },
         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "object-assign": {
           "version": "4.1.1",
         "once": {
           "version": "1.4.0",
           "bundled": true,
-          "optional": true,
           "requires": {
             "wrappy": "1"
           }
         },
         "safe-buffer": {
           "version": "5.1.1",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "safer-buffer": {
           "version": "2.1.2",
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
-          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
-          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
         },
         "wrappy": {
           "version": "1.0.2",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "yallist": {
           "version": "3.0.2",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         }
       }
     },
       }
     },
     "lib-jitsi-meet": {
-      "version": "github:jitsi/lib-jitsi-meet#86e3badd5c04e1df72435205d28a58c8a64e343a",
-      "from": "github:jitsi/lib-jitsi-meet#86e3badd5c04e1df72435205d28a58c8a64e343a",
+      "version": "github:jitsi/lib-jitsi-meet#f6054a887a5d5363681356aff6e79d89343f0bfc",
+      "from": "github:jitsi/lib-jitsi-meet#f6054a887a5d5363681356aff6e79d89343f0bfc",
       "requires": {
         "@jitsi/sdp-interop": "0.1.14",
         "@jitsi/sdp-simulcast": "0.2.1",

package.json

     "js-utils": "github:jitsi/js-utils#73a67a7a60d52f8e895f50939c8fcbd1f20fe7b5",
     "jsrsasign": "8.0.12",
     "jwt-decode": "2.2.0",
-    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#86e3badd5c04e1df72435205d28a58c8a64e343a",
+    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#f6054a887a5d5363681356aff6e79d89343f0bfc",
     "libflacjs": "github:mmig/libflac.js#93d37e7f811f01cf7d8b6a603e38bd3c3810907d",
     "lodash": "4.17.11",
     "moment": "2.19.4",