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Half Duplex script

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Philip Rosedale 2017-04-21 18:22:53 -07:00
parent 3f9f16cc98
commit 92368d981b
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scripts/tutorials/halfDuplex.js Normal file
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// halfDuplex.js
//
// Created by Philip Rosedale on April 21, 2017
// Copyright 2016 High Fidelity, Inc.
//
// Distributed under the Apache License, Version 2.0.
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
// This client script reduces echo by muting the microphone when others nearby are speaking,
// allowing the use of live microphones and speakers.
// NOTE: This will only work where there are no injectors playing sound effects,
// since those will not be muted and will cause feedback.
//
// IMPORTANT: If you use multiple source microphones, you must give the microphone avatars
// the display name 'Microphone' (or change the string below), to prevent feedback. This script
// will mute the other so-named avatars, so that you can have speakers connected to those same
// avatars and in the same room.
//
var averageLoudness = 0.0;
var AVERAGING_TIME = 0.9;
var LOUDNESS_THRESHOLD = 100;
var HYSTERESIS_GAP = 1.1;
var MICROPHONE_DISPLAY_NAME = "Microphone";
var debug = false;
var isMuted = false;
Script.update.connect(function () {
//
// Check for other people's audio levels, mute if anyone is talking.
//
var othersLoudness = 0;
var avatars = AvatarList.getAvatarIdentifiers();
avatars.forEach(function (id) {
var avatar = AvatarList.getAvatar(id);
if ((MyAvatar.sessionUUID !== avatar.sessionUUID) && (avatar.displayName.indexOf(MICROPHONE_DISPLAY_NAME) !== 0)) {
othersLoudness += Math.round(avatar.audioLoudness);
}
// Mute other microphone avatars to not feedback with muti-source environment
if (avatar.displayName.indexOf(MICROPHONE_DISPLAY_NAME) == 0) {
Users.personalMute(avatar.sessionUUID, true);
}
});
averageLoudness = AVERAGING_TIME * averageLoudness + (1.0 - AVERAGING_TIME) * othersLoudness;
if (!isMuted && (averageLoudness > LOUDNESS_THRESHOLD * HYSTERESIS_GAP)) {
if (debug) { print("Muted!"); }
isMuted = true;
if (!AudioDevice.getMuted()) {
AudioDevice.toggleMute();
}
} else if (isMuted && (averageLoudness < LOUDNESS_THRESHOLD)) {
if (debug) { print("UnMuted!"); }
isMuted = false;
if (AudioDevice.getMuted()) {
AudioDevice.toggleMute();
}
}
});