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update components

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This commit is contained in:
Luke Pulverenti 2016-06-01 14:04:22 -04:00
parent 1bd4890f44
commit e453a5b9f7
18 changed files with 387 additions and 128 deletions
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49
dashboard-ui/bower_components/hls.js/src/controller/ewma-bandwidth-estimator.js vendored Normal file
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/*
* EWMA Bandwidth Estimator
* - heavily inspired from shaka-player
* Tracks bandwidth samples and estimates available bandwidth.
* Based on the minimum of two exponentially-weighted moving averages with
* different half-lives.
*/
import EWMA from '../utils/ewma';
class EwmaBandWidthEstimator {
constructor(hls) {
this.hls = hls;
this.defaultEstimate_ = 5e5; // 500kbps
this.minWeight_ = 0.001;
this.minDelayMs_ = 50;
this.fast_ = new EWMA(hls.config.abrEwmaFast);
this.slow_ = new EWMA(hls.config.abrEwmaSlow);
}
sample(durationMs,numBytes) {
durationMs = Math.max(durationMs, this.minDelayMs_);
var bandwidth = 8000* numBytes / durationMs;
//console.log('instant bw:'+ Math.round(bandwidth));
// we weight sample using loading duration....
var weigth = durationMs / 1000;
this.fast_.sample(weigth,bandwidth);
this.slow_.sample(weigth,bandwidth);
}
getEstimate() {
if (this.fast_.getTotalWeight() < this.minWeight_) {
return this.defaultEstimate_;
}
//console.log('slow estimate:'+ Math.round(this.slow_.getEstimate()));
//console.log('fast estimate:'+ Math.round(this.fast_.getEstimate()));
// Take the minimum of these two estimates. This should have the effect of
// adapting down quickly, but up more slowly.
return Math.min(this.fast_.getEstimate(),this.slow_.getEstimate());
}
destroy() {
}
}
export default EwmaBandWidthEstimator;