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web+publisher: align moq watch client and disable passthrough by default

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every.channel 2026-02-21 01:49:46 -08:00
parent 5bce56ee79
commit c2db3c6727
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5 changed files with 88 additions and 23 deletions
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87
apps/web/app.js
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@ -1,11 +1,12 @@
// every.channel web watcher
//
// This uses the upstream hang web component (WebTransport + WebCodecs).
// This uses the upstream moq watch web component (WebTransport + WebCodecs).
// It is intentionally dependency-light: no framework, no bundler.
const DEFAULT_RELAY_URL = "https://cdn.moq.dev/anon";
const HANG_WATCH_MODULE_URL = "https://esm.sh/@kixelated/hang@0.7.0/watch/element.js";
let hangWatchModulePromise = null;
const MOQ_WATCH_MODULE_URL = "https://esm.sh/@moq/watch@0.1.1/element";
let moqWatchModulePromise = null;
let disposePlayerSignals = null;
function $(id) {
const el = document.getElementById(id);
@ -47,14 +48,69 @@ function setShareLink(text) {
el.textContent = text || "";
}
function clearPlayerSignals() {
if (typeof disposePlayerSignals === "function") {
disposePlayerSignals();
}
disposePlayerSignals = null;
}
function bindPlayerSignals(watch, name) {
const cleanup = [];
const maybeWatch = (signal, onValue) => {
if (!signal || typeof signal.watch !== "function") return;
const dispose = signal.watch(onValue);
if (typeof dispose === "function") cleanup.push(dispose);
};
let sawLoading = false;
maybeWatch(watch?.broadcast?.status, (status) => {
if (status === "loading") {
sawLoading = true;
setHint(`Connecting to relay and subscribing: ${name}`, "ok");
return;
}
if (status === "live") {
setHint(`Live: subscribed to ${name}`, "ok");
return;
}
if (status === "offline" && sawLoading) {
setHint(`Stream offline or ended: ${name}`, "warn");
}
});
maybeWatch(watch?.broadcast?.catalog, (catalog) => {
if (!catalog) return;
const hasVideo = Boolean(catalog.video && catalog.video.renditions);
const hasAudio = Boolean(catalog.audio && catalog.audio.renditions);
if (hasVideo || hasAudio) {
setHint(`Live: subscribed to ${name}`, "ok");
}
});
if (cleanup.length) {
disposePlayerSignals = () => {
for (const fn of cleanup) {
try {
fn();
} catch (_) {
// Best-effort cleanup only.
}
}
};
}
}
function mountPlayer(relayUrl, name) {
clearPlayerSignals();
const mount = $("playerMount");
mount.textContent = "";
const watch = document.createElement("hang-watch");
const watch = document.createElement("moq-watch");
watch.setAttribute("url", relayUrl);
watch.setAttribute("name", name);
watch.setAttribute("controls", "");
watch.setAttribute("path", name);
// A canvas enables video rendering. Without it, only audio is played.
const canvas = document.createElement("canvas");
@ -62,16 +118,17 @@ function mountPlayer(relayUrl, name) {
watch.appendChild(canvas);
mount.appendChild(watch);
bindPlayerSignals(watch, name);
}
async function ensureHangWatchElement() {
if (window.customElements && window.customElements.get("hang-watch")) return;
if (!hangWatchModulePromise) {
hangWatchModulePromise = import(HANG_WATCH_MODULE_URL);
async function ensureMoqWatchElement() {
if (window.customElements && window.customElements.get("moq-watch")) return;
if (!moqWatchModulePromise) {
moqWatchModulePromise = import(MOQ_WATCH_MODULE_URL);
}
await hangWatchModulePromise;
if (!(window.customElements && window.customElements.get("hang-watch"))) {
throw new Error("hang-watch custom element is unavailable");
await moqWatchModulePromise;
if (!(window.customElements && window.customElements.get("moq-watch"))) {
throw new Error("moq-watch custom element is unavailable");
}
}
@ -162,10 +219,10 @@ function main() {
}
try {
await ensureHangWatchElement();
await ensureMoqWatchElement();
} catch (e) {
setHint(
`Failed to load web player dependency: ${String(e)}. Disable script blockers for esm.sh and retry.`,
`Failed to load MoQ web player dependency: ${String(e)}. Disable script blockers for esm.sh and retry.`,
"warn",
);
return;