feat: Moves connectionquality to lib-jitsi-meet.

conference.js

 import ContactList from './modules/UI/side_pannels/contactlist/ContactList';
 
 import AuthHandler from './modules/UI/authentication/AuthHandler';
-
-import ConnectionQuality from './modules/connectionquality/connectionquality';
-
 import Recorder from './modules/recorder/Recorder';
 
-import CQEvents from './service/connectionquality/CQEvents';
-import UIEvents from './service/UI/UIEvents';
-
 import mediaDeviceHelper from './modules/devices/mediaDeviceHelper';
 
 import {reportError} from './modules/util/helpers';
 
+import UIEvents from './service/UI/UIEvents';
 import UIUtil from './modules/UI/util/UIUtil';
 
 const ConnectionEvents = JitsiMeetJS.events.connection;
 const TrackEvents = JitsiMeetJS.events.track;
 const TrackErrors = JitsiMeetJS.errors.track;
 
+const ConnectionQualityEvents = JitsiMeetJS.events.connectionQuality;
+
 let room, connection, localAudio, localVideo;
 
 /**
      * Returns the stats.
      */
     getStats() {
-        return ConnectionQuality.getStats();
+        return room.connectionQuality.getStats();
     },
     // end used by torture
 
 
         room.on(ConferenceEvents.CONNECTION_INTERRUPTED, () => {
             connectionIsInterrupted = true;
-            ConnectionQuality.updateLocalConnectionQuality(0);
             APP.UI.showLocalConnectionInterrupted(true);
         });
 
             });
         }
 
+        // TODO: Move this to the library.
         room.on(ConferenceEvents.CONNECTION_STATS, function (stats) {
             // if we say video muted we will use old method of calculating
             // quality and will not depend on localVideo if it is missing
-            ConnectionQuality.updateLocalStats(
+            room.connectionQuality.updateLocalStats(
                 stats,
                 connectionIsInterrupted,
                 localVideo ? localVideo.videoType : undefined,
                 localVideo ? localVideo.resolution : null);
         });
 
-        ConnectionQuality.addListener(CQEvents.LOCALSTATS_UPDATED,
+        room.on(ConnectionQualityEvents.LOCAL_STATS_UPDATED,
             (percent, stats) => {
                 APP.UI.updateLocalStats(percent, stats);
+
+                // TODO: Move this to the library.
                 // Send only the data that remote participants care about.
                 let data = {
                     bitrate: stats.bitrate,
                 }
             });
 
-        room.on(ConferenceEvents.ENDPOINT_MESSAGE_RECEIVED,
-            (participant, payload) => {
-                switch(payload.type) {
-                    case this.commands.defaults.CONNECTION_QUALITY: {
-                        let remoteVideo = participant.getTracks()
-                            .find(tr => tr.isVideoTrack());
-                        ConnectionQuality.updateRemoteStats(
-                            participant.getId(),
-                            payload.values,
-                            remoteVideo ? remoteVideo.videoType : undefined,
-                            remoteVideo ? remoteVideo.isMuted() : undefined);
-                        break;
-                    }
-                    default:
-                        console.warn("Unknown datachannel message", payload);
-                }
-            });
-
-        ConnectionQuality.addListener(CQEvents.REMOTESTATS_UPDATED,
+        room.on(ConnectionQualityEvents.REMOTE_STATS_UPDATED,
             (id, percent, stats) => {
                 APP.UI.updateRemoteStats(id, percent, stats);
-            });
+        });
 
         room.addCommandListener(this.commands.defaults.ETHERPAD, ({value}) => {
             APP.UI.initEtherpad(value);

modules/connectionquality/connectionquality.js

-/* global config */
-import EventEmitter from "events";
-
-import CQEvents from "../../service/connectionquality/CQEvents";
-
-const eventEmitter = new EventEmitter();
-
-/**
- * local stats
- * @type {{}}
- */
-var stats = {};
-
-/**
- * remote stats
- * @type {{}}
- */
-var remoteStats = {};
-
-/**
- * Quality percent( 100% - good, 0% - bad.) for the local user.
- */
-var localConnectionQuality = 100;
-
-/**
- * Quality percent( 100% - good, 0% - bad.) stored per id.
- */
-var remoteConnectionQuality = {};
-
-/**
- * Calculates the quality percent based on passed new and old value.
- * @param newVal the new value
- * @param oldVal the old value
- */
-function calculateQuality(newVal, oldVal) {
-    return (newVal <= oldVal) ? newVal : (9*oldVal + newVal) / 10;
-}
-
-// webrtc table describing simulcast resolutions and used bandwidth
-// https://chromium.googlesource.com/external/webrtc/+/master/webrtc/media/engine/simulcast.cc#42
-const _bandwidthMap = [
-    { width: 1920, height: 1080, layers:3, max: 5000, min: 800 },
-    { width: 1280, height: 720,  layers:3, max: 2500, min: 600 },
-    { width: 960,  height: 540,  layers:3, max: 900,  min: 450 },
-    { width: 640,  height: 360,  layers:2, max: 700,  min: 150 },
-    { width: 480,  height: 270,  layers:2, max: 450,  min: 150 },
-    { width: 320,  height: 180,  layers:1, max: 200,  min: 30 }
-];
-
-/**
- * We disable quality calculations based on bandwidth if simulcast is disabled,
- * or enable it in case of no simulcast and we force it.
- * @type {boolean}
- */
-const disableQualityBasedOnBandwidth =
-    config.forceQualityBasedOnBandwidth ? false : config.disableSimulcast;
-
-/**
- * Calculates the quality percentage based on the input resolution height and
- * the upload reported by the client. The value is based on the interval from
- * _bandwidthMap.
- * @param inputHeight the resolution used to open the camera.
- * @param upload the upload rate reported by client.
- * @returns {int} the percent of upload based on _bandwidthMap and maximum value
- * of 100, as values of the map are approximate and clients can stream above
- * those values. Returns undefined if no result is found.
- */
-function calculateQualityUsingUpload(inputHeight, upload) {
-    // found resolution from _bandwidthMap which height is equal or less than
-    // the inputHeight
-    let foundResolution = _bandwidthMap.find((r) => (r.height <= inputHeight));
-
-    if (!foundResolution)
-        return undefined;
-
-    if (upload <= foundResolution.min)
-        return 0;
-
-    return Math.min(
-        ((upload - foundResolution.min)*100)
-            / (foundResolution.max - foundResolution.min),
-        100);
-}
-
-export default {
-    /**
-     * Updates the local statistics
-     * @param data new statistics
-     * @param dontUpdateLocalConnectionQuality {boolean} if true -
-     * localConnectionQuality wont be recalculated.
-     * @param videoType the local video type
-     * @param isMuted current state of local video, whether it is muted
-     * @param resolution the current resolution used by local video
-     */
-    updateLocalStats:
-        function (data, dontUpdateLocalConnectionQuality,
-                  videoType, isMuted, resolution) {
-            stats = data;
-            if(!dontUpdateLocalConnectionQuality) {
-                let val = this._getNewQualityValue(
-                    stats,
-                    localConnectionQuality,
-                    videoType,
-                    isMuted,
-                    resolution);
-                if (val !== undefined)
-                    localConnectionQuality = val;
-            }
-            eventEmitter.emit(
-                CQEvents.LOCALSTATS_UPDATED, localConnectionQuality, stats);
-    },
-
-    /**
-     * Updates only the localConnectionQuality value
-     * @param values {int} the new value. should be from 0 - 100.
-     */
-    updateLocalConnectionQuality: function (value) {
-        localConnectionQuality = value;
-        eventEmitter.emit(CQEvents.LOCALSTATS_UPDATED, localConnectionQuality,
-            stats);
-    },
-
-    /**
-     * Updates remote statistics
-     * @param id the id associated with the statistics
-     * @param data the statistics received
-     * @param remoteVideoType the video type of the remote video
-     * @param isRemoteVideoMuted whether remote video is muted
-     */
-    updateRemoteStats:
-        function (id, data, remoteVideoType, isRemoteVideoMuted) {
-            if (!data ||
-                !("packetLoss" in data) ||
-                !("total" in data.packetLoss)) {
-                eventEmitter.emit(CQEvents.REMOTESTATS_UPDATED, id, null, null);
-                return;
-            }
-
-            let inputResolution = data.resolution;
-            // Use only the fields we need
-            data = {bitrate: data.bitrate, packetLoss: data.packetLoss};
-
-            remoteStats[id] = data;
-
-            let val = this._getNewQualityValue(
-                data,
-                remoteConnectionQuality[id],
-                remoteVideoType,
-                isRemoteVideoMuted,
-                inputResolution);
-            if (val !== undefined)
-                remoteConnectionQuality[id] = val;
-
-            eventEmitter.emit(
-                CQEvents.REMOTESTATS_UPDATED, id,
-                remoteConnectionQuality[id], remoteStats[id]);
-    },
-
-    /**
-     * Returns the new quality value based on the input parameters.
-     * Used to calculate remote and local values.
-     * @param data the data
-     * @param lastQualityValue the last value we calculated
-     * @param videoType need to check whether we are screen sharing
-     * @param isMuted is video muted
-     * @param resolution the input resolution used by the camera
-     * @returns {*} the newly calculated value or undefined if no result
-     * @private
-     */
-    _getNewQualityValue:
-        function (data, lastQualityValue, videoType, isMuted, resolution) {
-            if (disableQualityBasedOnBandwidth
-                || isMuted
-                || videoType === 'desktop'
-                || !resolution) {
-                return calculateQuality(
-                    100 - data.packetLoss.total,
-                    lastQualityValue || 100);
-            } else {
-                return calculateQualityUsingUpload(
-                    resolution,
-                    data.bitrate.upload);
-            }
-    },
-
-    /**
-     * Returns the local statistics.
-     */
-    getStats: function () {
-        return stats;
-    },
-
-    addListener: function (type, listener) {
-        eventEmitter.on(type, listener);
-    }
-};

service/connectionquality/CQEvents.js

-var CQEvents = {
-    LOCALSTATS_UPDATED: "cq.localstats_updated",
-    REMOTESTATS_UPDATED: "cq.remotestats_updated",
-    STOP: "cq.stop"
-};
-
-module.exports = CQEvents;