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66 lines
2.4 KiB
JavaScript
66 lines
2.4 KiB
JavaScript
// halfDuplex.js
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//
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// Created by Philip Rosedale on April 21, 2017
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// Copyright 2016 High Fidelity, Inc.
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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// This client script reduces echo by muting the microphone when others nearby are speaking,
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// allowing the use of live microphones and speakers.
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// NOTE: This will only work where there are no injectors playing sound effects,
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// since those will not be muted and will cause feedback.
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//
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// IMPORTANT: If you use multiple source microphones, you must give the microphone avatars
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// the display name 'Microphone' (or change the string below), to prevent feedback. This script
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// will mute the other so-named avatars, so that you can have speakers connected to those same
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// avatars and in the same room.
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//
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var averageLoudness = 0.0;
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var AVERAGING_TIME = 0.9;
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var LOUDNESS_THRESHOLD = 100;
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var HYSTERESIS_GAP = 1.41; // 3dB gap
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var MICROPHONE_DISPLAY_NAME = "Microphone";
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var debug = false;
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var isMuted = false;
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Script.update.connect(function () {
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//
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// Check for other people's audio levels, mute if anyone is talking.
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//
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var othersLoudness = 0;
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var avatars = AvatarList.getAvatarIdentifiers();
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avatars.forEach(function (id) {
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var avatar = AvatarList.getAvatar(id);
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if (MyAvatar.sessionUUID !== avatar.sessionUUID) {
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if (avatar.displayName.indexOf(MICROPHONE_DISPLAY_NAME) !== 0) {
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othersLoudness += Math.round(avatar.audioLoudness);
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}
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// Mute other microphone avatars to not feedback with muti-source environment
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if (avatar.displayName.indexOf(MICROPHONE_DISPLAY_NAME) === 0) {
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if (!Users.getPersonalMuteStatus(avatar.sessionUUID)) {
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Users.personalMute(avatar.sessionUUID, true);
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}
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}
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}
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});
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averageLoudness = AVERAGING_TIME * averageLoudness + (1.0 - AVERAGING_TIME) * othersLoudness;
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if (!isMuted && (averageLoudness > LOUDNESS_THRESHOLD * HYSTERESIS_GAP)) {
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if (debug) {
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print("Muted!");
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}
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isMuted = true;
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Audio.muted = true;
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} else if (isMuted && (averageLoudness < LOUDNESS_THRESHOLD)) {
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if (debug) {
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print("UnMuted!");
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}
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isMuted = false;
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Audio.muted = false;
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}
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});
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