mirror of https://github.com/jitsi/jitsi-meet
isymchych
10 years ago
parent
0fd0f5b633
commit
a10f9437f1
@ -1,15 +1,19 @@ |
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function NoopAnalytics() {} |
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NoopAnalytics.prototype.sendEvent = function () {}; |
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|
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function AnalyticsAdapter() { |
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var AnalyticsImpl = window.Analytics || NoopAnalytics; |
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this.analytics = new AnalyticsImpl(); |
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class NoopAnalytics { |
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sendEvent () {} |
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} |
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|
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AnalyticsAdapter.prototype.sendEvent = function (action, data) { |
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try { |
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this.analytics.sendEvent.apply(this.analytics, arguments); |
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} catch (ignored) {} |
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}; |
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const AnalyticsImpl = window.Analytics || NoopAnalytics; |
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|
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class AnalyticsAdapter { |
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constructor () { |
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this.analytics = new AnalyticsImpl(); |
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} |
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sendEvent (...args) { |
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try { |
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this.analytics.sendEvent(...args); |
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} catch (ignored) {} |
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} |
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} |
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module.exports = new AnalyticsAdapter(); |
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export default new AnalyticsAdapter(); |
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@ -1,128 +0,0 @@ |
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/* global config, AudioContext */ |
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/** |
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* Provides statistics for the local stream. |
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*/ |
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|
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var RTCBrowserType = require('../RTC/RTCBrowserType'); |
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var StatisticsEvents = require('../../service/statistics/Events'); |
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/** |
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* Size of the webaudio analyzer buffer. |
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* @type {number} |
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*/ |
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var WEBAUDIO_ANALYZER_FFT_SIZE = 2048; |
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|
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/** |
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* Value of the webaudio analyzer smoothing time parameter. |
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* @type {number} |
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*/ |
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var WEBAUDIO_ANALYZER_SMOOTING_TIME = 0.8; |
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|
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/** |
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* Converts time domain data array to audio level. |
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* @param samples the time domain data array. |
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* @returns {number} the audio level |
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*/ |
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function timeDomainDataToAudioLevel(samples) { |
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var maxVolume = 0; |
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var length = samples.length; |
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for (var i = 0; i < length; i++) { |
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if (maxVolume < samples[i]) |
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maxVolume = samples[i]; |
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} |
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return parseFloat(((maxVolume - 127) / 128).toFixed(3)); |
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} |
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/** |
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* Animates audio level change |
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* @param newLevel the new audio level |
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* @param lastLevel the last audio level |
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* @returns {Number} the audio level to be set |
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*/ |
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function animateLevel(newLevel, lastLevel) { |
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var value = 0; |
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var diff = lastLevel - newLevel; |
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if(diff > 0.2) { |
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value = lastLevel - 0.2; |
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} |
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else if(diff < -0.4) { |
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value = lastLevel + 0.4; |
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} |
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else { |
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value = newLevel; |
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} |
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return parseFloat(value.toFixed(3)); |
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} |
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|
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/** |
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* <tt>LocalStatsCollector</tt> calculates statistics for the local stream. |
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* |
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* @param stream the local stream |
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* @param interval stats refresh interval given in ms. |
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* @constructor |
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*/ |
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function LocalStatsCollector(stream, interval, |
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statisticsService, eventEmitter) { |
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window.AudioContext = window.AudioContext || window.webkitAudioContext; |
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this.stream = stream; |
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this.intervalId = null; |
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this.intervalMilis = interval; |
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this.eventEmitter = eventEmitter; |
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this.audioLevel = 0; |
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this.statisticsService = statisticsService; |
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} |
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|
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/** |
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* Starts the collecting the statistics. |
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*/ |
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LocalStatsCollector.prototype.start = function () { |
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if (config.disableAudioLevels || !window.AudioContext || |
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RTCBrowserType.isTemasysPluginUsed()) |
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return; |
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var context = new AudioContext(); |
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var analyser = context.createAnalyser(); |
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analyser.smoothingTimeConstant = WEBAUDIO_ANALYZER_SMOOTING_TIME; |
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analyser.fftSize = WEBAUDIO_ANALYZER_FFT_SIZE; |
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var source = context.createMediaStreamSource(this.stream); |
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source.connect(analyser); |
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var self = this; |
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this.intervalId = setInterval( |
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function () { |
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var array = new Uint8Array(analyser.frequencyBinCount); |
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analyser.getByteTimeDomainData(array); |
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var audioLevel = timeDomainDataToAudioLevel(array); |
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if (audioLevel != self.audioLevel) { |
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self.audioLevel = animateLevel(audioLevel, self.audioLevel); |
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self.eventEmitter.emit( |
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StatisticsEvents.AUDIO_LEVEL, |
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self.statisticsService.LOCAL_JID, |
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self.audioLevel); |
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} |
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}, |
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this.intervalMilis |
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); |
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}; |
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/** |
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* Stops collecting the statistics. |
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*/ |
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LocalStatsCollector.prototype.stop = function () { |
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if (this.intervalId) { |
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clearInterval(this.intervalId); |
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this.intervalId = null; |
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} |
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}; |
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|
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module.exports = LocalStatsCollector; |
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