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human
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switch worker from module to iife importscripts

pull/356/head
Vladimir Mandic 2021-06-02 16:46:07 -04:00
parent 2d354d03e1
commit b8db2f0a62
3 changed files with 18 additions and 4 deletions
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8
demo/index-worker.js
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@ -1,7 +1,11 @@
import Human from '../dist/human.esm.js';
// load Human using IIFE script as Chome Mobile does not support Modules as Workers
// import Human from '../dist/human.esm.js';
self.importScripts('../dist/human.js');
let busy = false;
const human = new Human();
// @ts-ignore // Human is registered as global namespace using IIFE script
// eslint-disable-next-line no-undef, new-cap
const human = new Human.default();
function log(...msg) {
const dt = new Date();

4
demo/index.js
View File

@ -387,7 +387,9 @@ function webWorker(input, image, canvas, timestamp) {
if (!worker) {
// create new webworker and add event handler only once
log('creating worker thread');
worker = new Worker(ui.worker, { type: 'module' });
// load Human using IIFE script as Chome Mobile does not support Modules as Workers
// worker = new Worker(ui.worker, { type: 'module' });
worker = new Worker(ui.worker);
// after receiving message from webworker, parse&draw results and send new frame for processing
worker.addEventListener('message', (msg) => {
if (msg.data.result.performance && msg.data.result.performance.total) ui.detectFPS.push(1000 / msg.data.result.performance.total);

10
src/interpolate.ts
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@ -11,7 +11,15 @@ export function calc(newResult: Result): Result {
// otherwise bufferedResult is a shallow clone of result plus updated local calculated values
// thus mixing by-reference and by-value assignments to minimize memory operations
const bufferedFactor = 1000 / (Date.now() - newResult.timestamp) / 4;
const elapsed = Date.now() - newResult.timestamp;
// curve fitted: buffer = 8 - ln(delay)
// interpolation formula: current = ((buffer - 1) * previous + live) / buffer
// - at 50ms delay buffer = ~4.1 => 28% towards live data
// - at 250ms delay buffer = ~2.5 => 40% towards live data
// - at 500ms delay buffer = ~1.8 => 55% towards live data
// - at 750ms delay buffer = ~1.4 => 71% towards live data
// - at 1sec delay buffer = 1 which means live data is used
const bufferedFactor = elapsed < 1000 ? 8 - Math.log(elapsed) : 1;
// interpolate body results
if (!bufferedResult.body || (newResult.body.length !== bufferedResult.body.length)) {