135 lines
3.4 KiB
JavaScript
135 lines
3.4 KiB
JavaScript
/* global APP, require */
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/* jshint -W101 */
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var EventEmitter = require("events");
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var eventEmitter = new EventEmitter();
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var CQEvents = require("../../service/connectionquality/CQEvents");
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var XMPPEvents = require("../../service/xmpp/XMPPEvents");
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/**
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* local stats
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* @type {{}}
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*/
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var stats = {};
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/**
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* remote stats
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* @type {{}}
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*/
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var remoteStats = {};
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/**
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* Interval for sending statistics to other participants
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* @type {null}
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*/
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var sendIntervalId = null;
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/**
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* Start statistics sending.
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*/
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function startSendingStats() {
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sendStats();
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sendIntervalId = setInterval(sendStats, 10000);
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}
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/**
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* Sends statistics to other participants
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*/
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function sendStats() {
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APP.xmpp.addToPresence("connectionQuality", convertToMUCStats(stats));
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}
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/**
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* Converts statistics to format for sending through XMPP
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* @param stats the statistics
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* @returns {{bitrate_donwload: *, bitrate_uplpoad: *, packetLoss_total: *, packetLoss_download: *, packetLoss_upload: *}}
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*/
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function convertToMUCStats(stats) {
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return {
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"bitrate_download": stats.bitrate.download,
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"bitrate_upload": stats.bitrate.upload,
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"packetLoss_total": stats.packetLoss.total,
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"packetLoss_download": stats.packetLoss.download,
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"packetLoss_upload": stats.packetLoss.upload
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};
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}
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/**
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* Converts statistics to format used by VideoLayout
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* @param stats
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* @returns {{bitrate: {download: *, upload: *}, packetLoss: {total: *, download: *, upload: *}}}
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*/
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function parseMUCStats(stats) {
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return {
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bitrate: {
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download: stats.bitrate_download,
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upload: stats.bitrate_upload
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},
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packetLoss: {
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total: stats.packetLoss_total,
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download: stats.packetLoss_download,
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upload: stats.packetLoss_upload
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}
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};
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}
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var ConnectionQuality = {
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init: function () {
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APP.xmpp.addListener(XMPPEvents.REMOTE_STATS, this.updateRemoteStats);
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APP.statistics.addConnectionStatsListener(this.updateLocalStats);
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APP.statistics.addRemoteStatsStopListener(this.stopSendingStats);
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},
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/**
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* Updates the local statistics
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* @param data new statistics
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*/
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updateLocalStats: function (data) {
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stats = data;
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eventEmitter.emit(CQEvents.LOCALSTATS_UPDATED, 100 - stats.packetLoss.total, stats);
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if (!sendIntervalId) {
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startSendingStats();
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}
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},
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/**
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* Updates remote statistics
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* @param jid the jid associated with the statistics
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* @param data the statistics
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*/
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updateRemoteStats: function (jid, data) {
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if (!data || !data.packetLoss_total) {
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eventEmitter.emit(CQEvents.REMOTESTATS_UPDATED, jid, null, null);
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return;
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}
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remoteStats[jid] = parseMUCStats(data);
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eventEmitter.emit(CQEvents.REMOTESTATS_UPDATED,
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jid, 100 - data.packetLoss_total, remoteStats[jid]);
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},
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/**
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* Stops statistics sending.
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*/
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stopSendingStats: function () {
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clearInterval(sendIntervalId);
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sendIntervalId = null;
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//notify UI about stopping statistics gathering
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eventEmitter.emit(CQEvents.STOP);
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},
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/**
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* Returns the local statistics.
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*/
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getStats: function () {
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return stats;
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},
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addListener: function (type, listener) {
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eventEmitter.on(type, listener);
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}
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};
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module.exports = ConnectionQuality; |