av/cmd/mjpeg-player/hlsjs/observer.js

39 lines
1.2 KiB
JavaScript

/*
AUTHOR
Trek Hopton <trek@ausocean.org>
LICENSE
This file is Copyright (C) 2020 the Australian Ocean Lab (AusOcean)
It is free software: you can redistribute it and/or modify them
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
It is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License in gpl.txt.
If not, see http://www.gnu.org/licenses.
For hls.js Copyright notice and license, see LICENSE file.
*/
import EventEmitter from '../eventemitter3/index.js';
/**
* Simple adapter sub-class of Nodejs-like EventEmitter.
*/
export class Observer extends EventEmitter {
/**
* We simply want to pass along the event-name itself
* in every call to a handler, which is the purpose of our `trigger` method
* extending the standard API.
*/
trigger(event, ...data) {
this.emit(event, event, ...data);
}
}