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David Kelly 2016-12-23 13:11:42 -08:00
parent 9eed430f49
commit 5065f027e7
1 changed files with 3 additions and 3 deletions
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scripts/system/pal.js
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@ -268,7 +268,7 @@ var LOUDNESS_FLOOR = 11.0;
var LOUDNESS_SCALE = 2.8 / 5.0; var LOUDNESS_SCALE = 2.8 / 5.0;
var LOG2 = Math.log(2.0); var LOG2 = Math.log(2.0);
var AUDIO_LEVEL_UPDATE_INTERVAL_MS = 100; // 10hz for now (change this and change the AVERAGING_RATIO too) var AUDIO_LEVEL_UPDATE_INTERVAL_MS = 100; // 10hz for now (change this and change the AVERAGING_RATIO too)
var accumulatedLevels={}; var accumulatedLevels = {};
function getAudioLevel(id) { function getAudioLevel(id) {
// the VU meter should work similarly to the one in AvatarInputs: log scale, exponentially averaged // the VU meter should work similarly to the one in AvatarInputs: log scale, exponentially averaged
@ -278,11 +278,11 @@ function getAudioLevel(id) {
var audioLevel = 0.0; var audioLevel = 0.0;
// we will do exponential moving average by taking some the last loudness and averaging // we will do exponential moving average by taking some the last loudness and averaging
accumulatedLevels[id] = AVERAGING_RATIO*(accumulatedLevels[id] || 0 ) + (1-AVERAGING_RATIO)*(avatar.audioLoudness); accumulatedLevels[id] = AVERAGING_RATIO * (accumulatedLevels[id] || 0 ) + (1 - AVERAGING_RATIO) * (avatar.audioLoudness);
// add 1 to insure we don't go log() and hit -infinity. Math.log is // add 1 to insure we don't go log() and hit -infinity. Math.log is
// natural log, so to get log base 2, just divide by ln(2). // natural log, so to get log base 2, just divide by ln(2).
var logLevel = Math.log(accumulatedLevels[id]+1) / LOG2; var logLevel = Math.log(accumulatedLevels[id] + 1) / LOG2;
if (logLevel <= LOUDNESS_FLOOR) { if (logLevel <= LOUDNESS_FLOOR) {
audioLevel = logLevel / LOUDNESS_FLOOR * LOUDNESS_SCALE; audioLevel = logLevel / LOUDNESS_FLOOR * LOUDNESS_SCALE;