wranglebot/build/core/transcode/TranscodeSetFactory.js

open source media asset management

import { EventEmitter } from "events";
export default class TranscodeSetFactory extends EventEmitter {
    constructor(transcodes) {
        super();
        this.transcodes = transcodes;
        this.transcodes.forEach((transcode) => {
            transcode.on("progress", (progress) => {
                this.emit("progress", progress);
            });
        });
    }
    runOne(transcode) {
        return new Promise((resolve, reject) => {
            transcode.on("error", (err) => {
                this.emit("error", err);
                reject(err);
            });
            transcode.on("end", (type) => {
                resolve(type);
            });
            transcode.run();
        });
    }
    run() {
        return new Promise((resolve, reject) => {
            let i = 0;
            const tick = () => {
                if (i >= this.transcodes.length) {
                    resolve(true);
                }
                else {
                    this.runOne(this.transcodes[i]).then(() => {
                        i++;
                        tick();
                    });
                }
            };
            tick();
        });
    }
}
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