https://slopstation.ai/cam-store.js

1// Shared camera stream across page navigations.
2// Strategy: browser can't truly persist a MediaStream across hard navigations,
3// but we persist the USER'S INTENT in sessionStorage and auto-reacquire on
4// page load. Within a single page, the stream is cached on window so multiple
5// modules (s.js, index.js) share one.
6
7const KEY = "18.cam.on";
8const WINDOW_KEY = "__1800_cam_stream__";
9
10export function wantsCamera() {
11    return sessionStorage.getItem(KEY) === "1";
12}
13export function setWantsCamera(on) {
14    if (on) sessionStorage.setItem(KEY, "1");
15    else sessionStorage.removeItem(KEY);
16}
17export function sharedStream() {
18    return window[WINDOW_KEY] || null;
19}
20
21export async function acquireCamera(constraints = {}) {
22    let s = sharedStream();
23    if (s && s.active) { setWantsCamera(true); return s; }
24    s = await navigator.mediaDevices.getUserMedia({
25        video: constraints.video ?? { width: 320, height: 240, frameRate: 15 },
26        audio: constraints.audio ?? { echoCancellation: true, noiseSuppression: true },
27    });
28    window[WINDOW_KEY] = s;
29    setWantsCamera(true);
30    return s;
31}
32
33export function releaseCamera() {
34    const s = sharedStream();
35    if (s) {
36        try { s.getTracks().forEach(t => t.stop()); } catch {}
37        window[WINDOW_KEY] = null;
38    }
39    setWantsCamera(false);
40}