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attempt to take background noise into account when triggering mute warning

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Seth Alves 2019-02-20 13:07:24 -08:00 committed by Wayne Chen
parent 76aa6fb1b9
commit bbad6af0d6
1 changed files with 24 additions and 9 deletions
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33
scripts/system/audioMuteOverlay.js
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@ -13,14 +13,22 @@
"use strict";
/* global Audio, Script, Overlays, Quat, MyAvatar */
/* global Audio, Script, Overlays, Quat, MyAvatar, HMD */
(function() { // BEGIN LOCAL_SCOPE
var lastInputLoudness = 0.0;
var lastShortTermInputLoudness = 0.0;
var lastLongTermInputLoudness = 0.0;
var sampleRate = 8.0; // Hz
var attackTC = Math.exp(-1.0 / (sampleRate * 0.500)); // 500 milliseconds attack
var releaseTC = Math.exp(-1.0 / (sampleRate * 1.000)); // 1000 milliseconds release
var shortTermAttackTC = Math.exp(-1.0 / (sampleRate * 0.500)); // 500 milliseconds attack
var shortTermReleaseTC = Math.exp(-1.0 / (sampleRate * 1.000)); // 1000 milliseconds release
var longTermAttackTC = Math.exp(-1.0 / (sampleRate * 5.0)); // 5 second attack
var longTermReleaseTC = Math.exp(-1.0 / (sampleRate * 10.0)); // 10 seconds release
var activationThreshold = 0.05; // how much louder short-term needs to be than long-term to trigger warning
var holdReset = 2.0 * sampleRate; // 2 seconds hold
var holdCount = 0;
var warningOverlayID = null;
@ -80,12 +88,19 @@
return;
}
pollInterval = Script.setInterval(function() {
var inputLoudness = Audio.inputLevel;
var tc = (inputLoudness > lastInputLoudness) ? attackTC : releaseTC;
inputLoudness += tc * (lastInputLoudness - inputLoudness);
lastInputLoudness = inputLoudness;
var shortTermInputLoudness = Audio.inputLevel;
var longTermInputLoudness = shortTermInputLoudness;
if (inputLoudness > 0.1) {
var shortTc = (shortTermInputLoudness > lastShortTermInputLoudness) ? shortTermAttackTC : shortTermReleaseTC;
var longTc = (longTermInputLoudness > lastLongTermInputLoudness) ? longTermAttackTC : longTermReleaseTC;
shortTermInputLoudness += shortTc * (lastShortTermInputLoudness - shortTermInputLoudness);
longTermInputLoudness += longTc * (lastLongTermInputLoudness - longTermInputLoudness);
lastShortTermInputLoudness = shortTermInputLoudness;
lastLongTermInputLoudness = longTermInputLoudness;
if (shortTermInputLoudness > lastLongTermInputLoudness + activationThreshold) {
holdCount = holdReset;
} else {
holdCount = Math.max(holdCount - 1, 0);