twilio-video/es5/preflight/syntheticvideo.js

Twilio Video JavaScript Library

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.syntheticVideo = syntheticVideo;
function syntheticVideo({ width = 640, height = 480 } = {}) {
    const canvas = Object.assign(document.createElement('canvas'), { width, height });
    let ctx = canvas.getContext('2d');
    ctx.fillStyle = 'green';
    ctx.fillRect(0, 0, canvas.width, canvas.height);
    let stopped = false;
    requestAnimationFrame(function animate() {
        if (!stopped) {
            // draw random rect/circle.
            const r = Math.round(Math.random() * 255);
            const g = Math.round(Math.random() * 255);
            const b = Math.round(Math.random() * 255);
            const a = Math.round(Math.random() * 255);
            ctx.fillStyle = `rgba(${r}, ${g}, ${b}, ${a})`;
            ctx.fillRect(Math.random() * width, Math.random() * height, 50, 50);
            requestAnimationFrame(animate);
        }
    });
    const stream = canvas.captureStream(30);
    const track = stream.getTracks()[0];
    const originalStop = track.stop;
    track.stop = () => {
        stopped = true;
        originalStop.call(track);
    };
    return track;
}
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