multiple video stream WiP

conference.js

@@ -105,6 +105,7 @@ import {
     updateSettings
 } from './react/features/base/settings';
 import {
+    addLocalTrack,
     createLocalPresenterTrack,
     createLocalTracksF,
     destroyLocalTracks,
@@ -1911,7 +1912,24 @@ export default {
 
                 if (desktopVideoStream) {
                     logger.debug(`_switchToScreenSharing is using ${desktopVideoStream} for useVideoStream`);
-                    await this.useVideoStream(desktopVideoStream);
+                    await new Promise((resolve, reject) => {
+                        _replaceLocalVideoTrackQueue.enqueue(onFinish => {
+                            APP.store.dispatch(
+                                addLocalTrack(desktopVideoStream))
+                                .then(() => {
+                                    this._setSharingScreen(desktopVideoStream);
+
+                                    // TODO FIXME
+                                    // this.setVideoMuteStatus();
+                                })
+                                .then(resolve)
+                                .catch(error => {
+                                    logger.error(`_switchToScreenSharing failed: ${error}`);
+                                    reject(error);
+                                })
+                                .then(onFinish);
+                        });
+                    });
                 }
 
                 if (this._desktopAudioStream) {

react/features/base/tracks/actions.js

@@ -5,6 +5,7 @@ import {
     sendAnalytics
 } from '../../analytics';
 import { NOTIFICATION_TIMEOUT_TYPE, showErrorNotification, showNotification } from '../../notifications';
+import { getCurrentConference } from '../conference';
 import { JitsiTrackErrors, JitsiTrackEvents, createLocalTrack } from '../lib-jitsi-meet';
 import {
     CAMERA_FACING_MODE,
@@ -312,6 +313,19 @@ export function replaceLocalTrack(oldTrack, newTrack, conference) {
     };
 }
 
+// eslint-disable-next-line require-jsdoc
+export function addLocalTrack(newTrack) {
+    return async (dispatch, getState) => {
+        const conference = getCurrentConference(getState());
+
+        if (conference) {
+            await conference.addTrack(newTrack);
+        }
+
+        return dispatch(_addTracks([ newTrack ]));
+    };
+}
+
 /**
  * Replaces a stored track with another.
  *