fx_cast/docs/receiver/index.js

"use strict";

const castReceiverManager = cast.receiver.CastReceiverManager.getInstance();

const mediaElement = document.querySelector(".media");
const mediaManager = new cast.receiver.MediaManager(mediaElement);

mediaElement.height = window.innerHeight;
mediaElement.width = window.innerWidth;

let senderId;

const messageBus = castReceiverManager.getCastMessageBus(
    "urn:x-cast:fx_cast",
    cast.receiver.CastMessageBus.MessageType.JSON
);

messageBus.onMessage = async message => {
    const { subject, data } = message.data;

    senderId = message.senderId;

    switch (subject) {
        case "peerConnectionOffer": {
            await pc.setRemoteDescription(data);
            const desc = await pc.createAnswer();
            await pc.setLocalDescription(desc);

            messageBus.send(message.senderId, {
                subject: "peerConnectionAnswer",
                data: desc
            });

            break;
        }

        case "iceCandidate": {
            await pc.addIceCandidate(data);
            break;
        }

        case "close": {
            window.close();
            break;
        }
    }
};

const pc = new RTCPeerConnection();

pc.addEventListener("icecandidate", ev => {
    messageBus.send(senderId, {
        subject: "iceCandidate",
        data: ev.candidate
    });
});

pc.addEventListener("addstream", ev => {
    mediaElement.srcObject = ev.stream;
    mediaElement.webkitRequestFullscreen();

    const splash = document.querySelector(".splash");
    splash.classList.add("splash--disabled");
});

// TODO: Fix API shim to make this work
castReceiverManager.onSenderDisconnected = ev => {
    if (castReceiverManager.getSenders().length <= 0) {
        window.close();
    }
};

castReceiverManager.start();