mirror of
https://github.com/imgfloat/server.git
synced 2026-02-05 11:49:25 +00:00
950 lines
28 KiB
JavaScript
950 lines
28 KiB
JavaScript
const canvas = document.getElementById("broadcast-canvas");
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const obsBrowser = !!globalThis.obsstudio;
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const supportsAnimatedDecode =
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typeof ImageDecoder !== "undefined" && typeof createImageBitmap === "function" && !obsBrowser;
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const canPlayProbe = document.createElement("video");
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const ctx = canvas.getContext("2d");
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let canvasSettings = { width: 1920, height: 1080 };
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const assets = new Map();
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const mediaCache = new Map();
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const renderStates = new Map();
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const visibilityStates = new Map();
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const animatedCache = new Map();
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const blobCache = new Map();
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const animationFailures = new Map();
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const audioControllers = new Map();
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const videoPlaybackStates = new WeakMap();
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const pendingAudioUnlock = new Set();
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const TARGET_FPS = 60;
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const MIN_FRAME_TIME = 1000 / TARGET_FPS;
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const VISIBILITY_THRESHOLD = 0.01;
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let lastRenderTime = 0;
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let frameScheduled = false;
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let pendingDraw = false;
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let renderIntervalId = null;
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const audioUnlockEvents = ["pointerdown", "keydown", "touchstart"];
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let layerOrder = [];
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applyCanvasSettings(canvasSettings);
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audioUnlockEvents.forEach((eventName) => {
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globalThis.addEventListener(eventName, () => {
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if (!pendingAudioUnlock.size) return;
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pendingAudioUnlock.forEach((controller) => safePlay(controller));
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pendingAudioUnlock.clear();
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});
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});
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function ensureLayerPosition(assetId, placement = "keep") {
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const asset = assets.get(assetId);
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if (asset && (isAudioAsset(asset) || isCodeAsset(asset))) {
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return;
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}
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const existingIndex = layerOrder.indexOf(assetId);
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if (existingIndex !== -1 && placement === "keep") {
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return;
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}
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if (existingIndex !== -1) {
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layerOrder.splice(existingIndex, 1);
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}
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if (placement === "append") {
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layerOrder.push(assetId);
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} else {
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layerOrder.unshift(assetId);
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}
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layerOrder = layerOrder.filter((id) => assets.has(id));
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}
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function getLayerOrder() {
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layerOrder = layerOrder.filter((id) => {
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const asset = assets.get(id);
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return asset && !isAudioAsset(asset) && !isCodeAsset(asset);
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});
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assets.forEach((asset, id) => {
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if (isAudioAsset(asset) || isCodeAsset(asset)) {
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return;
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}
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if (!layerOrder.includes(id)) {
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layerOrder.unshift(id);
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}
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});
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return layerOrder;
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}
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function getRenderOrder() {
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return [...getLayerOrder()]
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.reverse()
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.map((id) => assets.get(id))
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.filter(Boolean);
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}
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function removeAsset(assetId) {
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assets.delete(assetId);
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layerOrder = layerOrder.filter((id) => id !== assetId);
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clearMedia(assetId);
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stopUserJavaScriptWorker(assetId);
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renderStates.delete(assetId);
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visibilityStates.delete(assetId);
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}
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function connect() {
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const socket = new SockJS("/ws");
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const stompClient = Stomp.over(socket);
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stompClient.connect({}, () => {
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stompClient.subscribe(`/topic/channel/${broadcaster}`, (payload) => {
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const body = JSON.parse(payload.body);
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handleEvent(body);
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});
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fetch(`/api/channels/${broadcaster}/assets`)
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.then((r) => {
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if (!r.ok) {
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throw new Error("Failed to load assets");
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}
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return r.json();
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})
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.then(renderAssets)
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.catch(() => showToast("Unable to load overlay assets. Retrying may help.", "error"));
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});
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}
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function renderAssets(list) {
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layerOrder = [];
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list.forEach((asset) => {
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storeAsset(asset, "append");
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if (isCodeAsset(asset)) {
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spawnUserJavaScriptWorker(asset);
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}
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});
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draw();
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}
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function storeAsset(asset, placement = "keep") {
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if (!asset) return;
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console.info(`Storing asset: ${asset.id}`);
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const wasExisting = assets.has(asset.id);
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assets.set(asset.id, asset);
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ensureLayerPosition(asset.id, placement);
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if (!wasExisting && !visibilityStates.has(asset.id)) {
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const initialAlpha = 0; // Fade in newly discovered assets
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visibilityStates.set(asset.id, { alpha: initialAlpha, targetHidden: !!asset.hidden });
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}
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}
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async function fetchCanvasSettings() {
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return fetch(`/api/channels/${encodeURIComponent(broadcaster)}/canvas`)
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.then((r) => {
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if (!r.ok) {
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throw new Error("Failed to load canvas");
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}
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return r.json();
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})
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.then((settings) => {
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applyCanvasSettings(settings);
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})
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.catch(() => {
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resizeCanvas();
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showToast("Using default canvas size. Unable to load saved settings.", "warning");
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});
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}
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function applyCanvasSettings(settings) {
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if (!settings) {
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return;
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}
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const width = Number.isFinite(settings.width) ? settings.width : canvasSettings.width;
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const height = Number.isFinite(settings.height) ? settings.height : canvasSettings.height;
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canvasSettings = { width, height };
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resizeCanvas();
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}
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function resizeCanvas() {
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if (Number.isFinite(canvasSettings.width) && Number.isFinite(canvasSettings.height)) {
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canvas.width = canvasSettings.width;
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canvas.height = canvasSettings.height;
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canvas.style.width = `${canvasSettings.width}px`;
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canvas.style.height = `${canvasSettings.height}px`;
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}
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draw();
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}
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function handleEvent(event) {
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if (event.type === "CANVAS" && event.payload) {
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applyCanvasSettings(event.payload);
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return;
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}
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const assetId = event.assetId || event?.patch?.id || event?.payload?.id;
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if (event.type === "VISIBILITY") {
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handleVisibilityEvent(event);
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return;
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}
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if (event.type === "DELETED") {
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removeAsset(assetId);
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} else if (event.patch) {
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applyPatch(assetId, event.patch);
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if (event.payload) {
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const payload = normalizePayload(event.payload);
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if (payload.hidden) {
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hideAssetWithTransition(payload);
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} else if (!assets.has(payload.id)) {
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upsertVisibleAsset(payload, "append");
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}
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}
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} else if (event.type === "PLAY" && event.payload) {
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const payload = normalizePayload(event.payload);
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storeAsset(payload);
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if (isAudioAsset(payload)) {
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handleAudioPlay(payload, event.play !== false);
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}
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} else if (event.payload && !event.payload.hidden) {
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const payload = normalizePayload(event.payload);
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upsertVisibleAsset(payload);
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} else if (event.payload && event.payload.hidden) {
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hideAssetWithTransition(event.payload);
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}
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draw();
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}
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function normalizePayload(payload) {
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return { ...payload };
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}
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function hideAssetWithTransition(asset) {
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const payload = asset ? normalizePayload(asset) : null;
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if (!payload?.id) {
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return;
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}
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const existing = assets.get(payload.id);
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if (
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!existing &&
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(!Number.isFinite(payload.x) ||
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!Number.isFinite(payload.y) ||
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!Number.isFinite(payload.width) ||
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!Number.isFinite(payload.height))
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) {
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return;
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}
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const merged = normalizePayload({ ...(existing || {}), ...payload, hidden: true });
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storeAsset(merged);
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stopUserJavaScriptWorker(merged.id);
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stopAudio(payload.id);
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}
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function upsertVisibleAsset(asset, placement = "keep") {
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const payload = asset ? normalizePayload(asset) : null;
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if (!payload?.id) {
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return;
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}
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const placementMode = assets.has(payload.id) ? "keep" : placement;
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storeAsset(payload, placementMode);
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ensureMedia(payload);
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if (isAudioAsset(payload)) {
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playAudioImmediately(payload);
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} else if (isCodeAsset(payload)) {
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spawnUserJavaScriptWorker(payload);
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}
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}
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function handleVisibilityEvent(event) {
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const payload = event.payload ? normalizePayload(event.payload) : null;
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const patch = event.patch;
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const id = payload?.id || patch?.id || event.assetId;
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if (payload?.hidden || patch?.hidden) {
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hideAssetWithTransition({ id, ...payload, ...patch });
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draw();
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return;
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}
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if (payload) {
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const placement = assets.has(payload.id) ? "keep" : "append";
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upsertVisibleAsset(payload, placement);
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}
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if (patch && id) {
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applyPatch(id, patch);
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}
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draw();
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}
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function applyPatch(assetId, patch) {
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if (!assetId || !patch) {
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return;
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}
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const sanitizedPatch = Object.fromEntries(
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Object.entries(patch).filter(([, value]) => value !== null && value !== undefined),
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);
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const existing = assets.get(assetId);
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if (!existing) {
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return;
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}
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const merged = normalizePayload({ ...existing, ...sanitizedPatch });
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console.log(merged)
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const isAudio = isAudioAsset(merged);
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if (sanitizedPatch.hidden) {
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hideAssetWithTransition(merged);
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return;
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}
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const targetLayer = Number.isFinite(patch.layer)
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? patch.layer
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: Number.isFinite(patch.zIndex)
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? patch.zIndex
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: null;
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if (!isAudio && Number.isFinite(targetLayer)) {
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const currentOrder = getLayerOrder().filter((id) => id !== assetId);
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const insertIndex = Math.max(0, currentOrder.length - Math.round(targetLayer));
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currentOrder.splice(insertIndex, 0, assetId);
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layerOrder = currentOrder;
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}
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storeAsset(merged);
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ensureMedia(merged);
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if (isCodeAsset(merged)) {
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console.info(`Spawning JS worker for patched asset: ${merged.id}`);
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spawnUserJavaScriptWorker(merged);
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}
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}
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function draw() {
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if (frameScheduled) {
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pendingDraw = true;
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return;
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}
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frameScheduled = true;
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requestAnimationFrame((timestamp) => {
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const elapsed = timestamp - lastRenderTime;
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const delay = MIN_FRAME_TIME - elapsed;
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const shouldRender = elapsed >= MIN_FRAME_TIME;
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if (shouldRender) {
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lastRenderTime = timestamp;
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renderFrame();
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}
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frameScheduled = false;
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if (pendingDraw || !shouldRender) {
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pendingDraw = false;
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setTimeout(draw, Math.max(0, delay));
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}
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});
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}
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function renderFrame() {
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ctx.clearRect(0, 0, canvas.width, canvas.height);
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getRenderOrder().forEach(drawAsset);
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}
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function drawAsset(asset) {
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const visibility = getVisibilityState(asset);
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if (visibility.alpha <= VISIBILITY_THRESHOLD && asset.hidden) {
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return;
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}
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const renderState = smoothState(asset);
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const halfWidth = renderState.width / 2;
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const halfHeight = renderState.height / 2;
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ctx.save();
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ctx.globalAlpha = Math.max(0, Math.min(1, visibility.alpha));
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ctx.translate(renderState.x + halfWidth, renderState.y + halfHeight);
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ctx.rotate((renderState.rotation * Math.PI) / 180);
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if (isCodeAsset(asset)) {
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ctx.restore();
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return;
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}
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if (isAudioAsset(asset)) {
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if (!asset.hidden) {
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autoStartAudio(asset);
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}
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ctx.restore();
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return;
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}
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const media = ensureMedia(asset);
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const drawSource = media?.isAnimated ? media.bitmap : media;
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const ready = isDrawable(media);
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if (ready && drawSource) {
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ctx.drawImage(drawSource, -halfWidth, -halfHeight, renderState.width, renderState.height);
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}
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ctx.restore();
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}
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function getVisibilityState(asset) {
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const current = visibilityStates.get(asset.id) || {};
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const targetAlpha = asset.hidden ? 0 : 1;
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const startingAlpha = Number.isFinite(current.alpha) ? current.alpha : 0;
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const factor = asset.hidden ? 0.18 : 0.2;
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const nextAlpha = lerp(startingAlpha, targetAlpha, factor);
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const state = { alpha: nextAlpha, targetHidden: !!asset.hidden };
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visibilityStates.set(asset.id, state);
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return state;
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}
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function smoothState(asset) {
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const previous = renderStates.get(asset.id) || { ...asset };
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const factor = 0.15;
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const next = {
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x: lerp(previous.x, asset.x, factor),
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y: lerp(previous.y, asset.y, factor),
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width: lerp(previous.width, asset.width, factor),
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height: lerp(previous.height, asset.height, factor),
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rotation: smoothAngle(previous.rotation, asset.rotation, factor),
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};
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renderStates.set(asset.id, next);
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return next;
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}
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function smoothAngle(current, target, factor) {
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const delta = ((target - current + 180) % 360) - 180;
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return current + delta * factor;
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}
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function lerp(a, b, t) {
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return a + (b - a) * t;
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}
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function queueAudioForUnlock(controller) {
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if (!controller) return;
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pendingAudioUnlock.add(controller);
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}
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function safePlay(controller) {
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if (!controller?.element) return;
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const playPromise = controller.element.play();
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if (playPromise?.catch) {
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playPromise.catch(() => queueAudioForUnlock(controller));
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}
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}
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function recordDuration(assetId, seconds) {
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if (!Number.isFinite(seconds) || seconds <= 0) {
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return;
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}
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const asset = assets.get(assetId);
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if (!asset) {
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return;
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}
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const nextMs = Math.round(seconds * 1000);
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if (asset.durationMs === nextMs) {
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return;
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}
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asset.durationMs = nextMs;
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}
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function isVideoAsset(asset) {
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return asset?.mediaType?.startsWith("video/");
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}
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function isAudioAsset(asset) {
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return asset?.mediaType?.startsWith("audio/");
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}
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function getVideoPlaybackState(element) {
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if (!element) {
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return { playRequested: false, unmuteOnPlay: false };
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}
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let state = videoPlaybackStates.get(element);
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if (!state) {
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state = { playRequested: false, unmuteOnPlay: false };
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videoPlaybackStates.set(element, state);
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}
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return state;
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}
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function isCodeAsset(asset) {
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const type = (asset?.mediaType || asset?.originalMediaType || "").toLowerCase();
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return type.startsWith("application/javascript") || type.startsWith("text/javascript");
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}
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function isVideoElement(element) {
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return element?.tagName === "VIDEO";
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}
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function isGifAsset(asset) {
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return asset?.mediaType?.toLowerCase() === "image/gif";
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}
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function isDrawable(element) {
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if (!element) {
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return false;
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}
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if (element.isAnimated) {
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return !!element.bitmap;
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}
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if (isVideoElement(element)) {
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return element.readyState >= 2;
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}
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if (typeof ImageBitmap !== "undefined" && element instanceof ImageBitmap) {
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return true;
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}
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return !!element.complete;
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}
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function clearMedia(assetId) {
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const element = mediaCache.get(assetId);
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if (isVideoElement(element)) {
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element.src = "";
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element.remove();
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}
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mediaCache.delete(assetId);
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const animated = animatedCache.get(assetId);
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if (animated) {
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animated.cancelled = true;
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clearTimeout(animated.timeout);
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animated.bitmap?.close?.();
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animated.decoder?.close?.();
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animatedCache.delete(assetId);
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}
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animationFailures.delete(assetId);
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const cachedBlob = blobCache.get(assetId);
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if (cachedBlob?.objectUrl) {
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URL.revokeObjectURL(cachedBlob.objectUrl);
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}
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blobCache.delete(assetId);
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const audio = audioControllers.get(assetId);
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if (audio) {
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if (audio.delayTimeout) {
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clearTimeout(audio.delayTimeout);
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}
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audio.element.pause();
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audio.element.currentTime = 0;
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audio.element.src = "";
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audio.element.remove();
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audioControllers.delete(assetId);
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}
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}
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function ensureAudioController(asset) {
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const cached = audioControllers.get(asset.id);
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if (cached && cached.src === asset.url) {
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applyAudioSettings(cached, asset);
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return cached;
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}
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if (cached) {
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clearMedia(asset.id);
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}
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const element = new Audio(asset.url);
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element.autoplay = true;
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element.preload = "auto";
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element.controls = false;
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element.addEventListener("loadedmetadata", () => recordDuration(asset.id, element.duration));
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const controller = {
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id: asset.id,
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src: asset.url,
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element,
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delayTimeout: null,
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loopEnabled: false,
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loopActive: true,
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delayMs: 0,
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baseDelayMs: 0,
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};
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element.onended = () => handleAudioEnded(asset.id);
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audioControllers.set(asset.id, controller);
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applyAudioSettings(controller, asset, true);
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return controller;
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}
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function applyAudioSettings(controller, asset, resetPosition = false) {
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controller.loopEnabled = !!asset.audioLoop;
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controller.loopActive = controller.loopEnabled && controller.loopActive !== false;
|
|
controller.baseDelayMs = Math.max(0, asset.audioDelayMillis || 0);
|
|
controller.delayMs = controller.baseDelayMs;
|
|
applyAudioElementSettings(controller.element, asset);
|
|
if (resetPosition) {
|
|
controller.element.currentTime = 0;
|
|
controller.element.pause();
|
|
}
|
|
}
|
|
|
|
function applyAudioElementSettings(element, asset) {
|
|
const speed = Math.max(0.25, asset.audioSpeed || 1);
|
|
const pitch = Math.max(0.5, asset.audioPitch || 1);
|
|
element.playbackRate = speed * pitch;
|
|
const volume = Math.max(0, Math.min(2, asset.audioVolume ?? 1));
|
|
element.volume = Math.min(volume, 1);
|
|
}
|
|
|
|
function getAssetVolume(asset) {
|
|
return Math.max(0, Math.min(2, asset?.audioVolume ?? 1));
|
|
}
|
|
|
|
function applyMediaVolume(element, asset) {
|
|
if (!element) return 1;
|
|
const volume = getAssetVolume(asset);
|
|
element.volume = Math.min(volume, 1);
|
|
return volume;
|
|
}
|
|
|
|
function handleAudioEnded(assetId) {
|
|
const controller = audioControllers.get(assetId);
|
|
if (!controller) return;
|
|
controller.element.currentTime = 0;
|
|
if (controller.delayTimeout) {
|
|
clearTimeout(controller.delayTimeout);
|
|
}
|
|
if (controller.loopEnabled && controller.loopActive) {
|
|
controller.delayTimeout = setTimeout(() => {
|
|
safePlay(controller);
|
|
}, controller.delayMs);
|
|
} else {
|
|
controller.element.pause();
|
|
}
|
|
}
|
|
|
|
function stopAudio(assetId) {
|
|
const controller = audioControllers.get(assetId);
|
|
if (!controller) return;
|
|
if (controller.delayTimeout) {
|
|
clearTimeout(controller.delayTimeout);
|
|
}
|
|
controller.element.pause();
|
|
controller.element.currentTime = 0;
|
|
controller.delayTimeout = null;
|
|
controller.delayMs = controller.baseDelayMs;
|
|
controller.loopActive = false;
|
|
}
|
|
|
|
function playAudioImmediately(asset) {
|
|
const controller = ensureAudioController(asset);
|
|
if (controller.delayTimeout) {
|
|
clearTimeout(controller.delayTimeout);
|
|
controller.delayTimeout = null;
|
|
}
|
|
controller.element.currentTime = 0;
|
|
const originalDelay = controller.delayMs;
|
|
controller.delayMs = 0;
|
|
safePlay(controller);
|
|
controller.delayMs = controller.baseDelayMs ?? originalDelay ?? 0;
|
|
}
|
|
|
|
function playOverlappingAudio(asset) {
|
|
const temp = new Audio(asset.url);
|
|
temp.autoplay = true;
|
|
temp.preload = "auto";
|
|
temp.controls = false;
|
|
applyAudioElementSettings(temp, asset);
|
|
const controller = { element: temp };
|
|
temp.onended = () => {
|
|
temp.remove();
|
|
};
|
|
safePlay(controller);
|
|
}
|
|
|
|
function handleAudioPlay(asset, shouldPlay) {
|
|
const controller = ensureAudioController(asset);
|
|
controller.loopActive = !!shouldPlay;
|
|
if (!shouldPlay) {
|
|
stopAudio(asset.id);
|
|
return;
|
|
}
|
|
if (asset.audioLoop) {
|
|
controller.delayMs = controller.baseDelayMs;
|
|
safePlay(controller);
|
|
} else {
|
|
playOverlappingAudio(asset);
|
|
}
|
|
}
|
|
|
|
function autoStartAudio(asset) {
|
|
if (!isAudioAsset(asset) || asset.hidden) {
|
|
return;
|
|
}
|
|
const controller = ensureAudioController(asset);
|
|
if (!controller.loopEnabled || !controller.loopActive) {
|
|
return;
|
|
}
|
|
if (!controller.element.paused && !controller.element.ended) {
|
|
return;
|
|
}
|
|
if (controller.delayTimeout) {
|
|
return;
|
|
}
|
|
controller.delayTimeout = setTimeout(() => {
|
|
safePlay(controller);
|
|
}, controller.delayMs);
|
|
}
|
|
|
|
function ensureMedia(asset) {
|
|
const cached = mediaCache.get(asset.id);
|
|
const cachedSource = getCachedSource(cached);
|
|
if (cached && cachedSource !== asset.url) {
|
|
clearMedia(asset.id);
|
|
}
|
|
if (cached && cachedSource === asset.url) {
|
|
applyMediaSettings(cached, asset);
|
|
return cached;
|
|
}
|
|
|
|
if (isAudioAsset(asset)) {
|
|
ensureAudioController(asset);
|
|
mediaCache.delete(asset.id);
|
|
return null;
|
|
}
|
|
|
|
if (isGifAsset(asset) && supportsAnimatedDecode) {
|
|
const animated = ensureAnimatedImage(asset);
|
|
if (animated) {
|
|
mediaCache.set(asset.id, animated);
|
|
return animated;
|
|
}
|
|
}
|
|
|
|
const element = isVideoAsset(asset) ? document.createElement("video") : new Image();
|
|
element.dataset.sourceUrl = asset.url;
|
|
element.crossOrigin = "anonymous";
|
|
if (isVideoElement(element)) {
|
|
if (!canPlayVideoType(asset.mediaType)) {
|
|
return null;
|
|
}
|
|
element.loop = true;
|
|
element.playsInline = true;
|
|
element.autoplay = true;
|
|
element.controls = false;
|
|
element.onloadeddata = draw;
|
|
element.onloadedmetadata = () => recordDuration(asset.id, element.duration);
|
|
element.preload = "auto";
|
|
element.addEventListener("error", () => clearMedia(asset.id));
|
|
const playbackState = getVideoPlaybackState(element);
|
|
element.addEventListener("playing", () => {
|
|
playbackState.playRequested = false;
|
|
if (playbackState.unmuteOnPlay) {
|
|
element.muted = false;
|
|
playbackState.unmuteOnPlay = false;
|
|
}
|
|
});
|
|
element.addEventListener("pause", () => {
|
|
playbackState.playRequested = false;
|
|
});
|
|
applyMediaVolume(element, asset);
|
|
element.muted = true;
|
|
setVideoSource(element, asset);
|
|
} else {
|
|
element.onload = draw;
|
|
element.src = asset.url;
|
|
}
|
|
mediaCache.set(asset.id, element);
|
|
return element;
|
|
}
|
|
|
|
function ensureAnimatedImage(asset) {
|
|
const failedAt = animationFailures.get(asset.id);
|
|
if (failedAt && Date.now() - failedAt < 15000) {
|
|
return null;
|
|
}
|
|
const cached = animatedCache.get(asset.id);
|
|
if (cached && cached.url === asset.url) {
|
|
return cached;
|
|
}
|
|
|
|
animationFailures.delete(asset.id);
|
|
|
|
if (cached) {
|
|
clearMedia(asset.id);
|
|
}
|
|
|
|
const controller = {
|
|
id: asset.id,
|
|
url: asset.url,
|
|
src: asset.url,
|
|
decoder: null,
|
|
bitmap: null,
|
|
timeout: null,
|
|
cancelled: false,
|
|
isAnimated: true,
|
|
};
|
|
|
|
fetchAssetBlob(asset)
|
|
.then((blob) => new ImageDecoder({ data: blob, type: blob.type || "image/gif" }))
|
|
.then((decoder) => {
|
|
if (controller.cancelled) {
|
|
decoder.close?.();
|
|
return null;
|
|
}
|
|
controller.decoder = decoder;
|
|
scheduleNextFrame(controller);
|
|
return controller;
|
|
})
|
|
.catch(() => {
|
|
animatedCache.delete(asset.id);
|
|
animationFailures.set(asset.id, Date.now());
|
|
});
|
|
|
|
animatedCache.set(asset.id, controller);
|
|
return controller;
|
|
}
|
|
|
|
function fetchAssetBlob(asset) {
|
|
const cached = blobCache.get(asset.id);
|
|
if (cached && cached.url === asset.url && cached.blob) {
|
|
return Promise.resolve(cached.blob);
|
|
}
|
|
if (cached && cached.url === asset.url && cached.pending) {
|
|
return cached.pending;
|
|
}
|
|
|
|
const pending = fetch(asset.url)
|
|
.then((r) => r.blob())
|
|
.then((blob) => {
|
|
const previous = blobCache.get(asset.id);
|
|
const existingUrl = previous?.url === asset.url ? previous.objectUrl : null;
|
|
const objectUrl = existingUrl || URL.createObjectURL(blob);
|
|
blobCache.set(asset.id, { url: asset.url, blob, objectUrl });
|
|
return blob;
|
|
});
|
|
blobCache.set(asset.id, { url: asset.url, pending });
|
|
return pending;
|
|
}
|
|
|
|
function setVideoSource(element, asset) {
|
|
if (!shouldUseBlobUrl(asset)) {
|
|
applyVideoSource(element, asset.url, asset);
|
|
return;
|
|
}
|
|
|
|
const cached = blobCache.get(asset.id);
|
|
if (cached?.url === asset.url && cached.objectUrl) {
|
|
applyVideoSource(element, cached.objectUrl, asset);
|
|
return;
|
|
}
|
|
|
|
fetchAssetBlob(asset)
|
|
.then(() => {
|
|
const next = blobCache.get(asset.id);
|
|
if (next?.url !== asset.url || !next.objectUrl) {
|
|
return;
|
|
}
|
|
applyVideoSource(element, next.objectUrl, asset);
|
|
})
|
|
.catch(() => { });
|
|
}
|
|
|
|
function applyVideoSource(element, objectUrl, asset) {
|
|
element.src = objectUrl;
|
|
startVideoPlayback(element, asset);
|
|
}
|
|
|
|
function shouldUseBlobUrl(asset) {
|
|
return !obsBrowser && asset?.mediaType && canPlayVideoType(asset.mediaType);
|
|
}
|
|
|
|
function canPlayVideoType(mediaType) {
|
|
if (!mediaType) {
|
|
return true;
|
|
}
|
|
const support = canPlayProbe.canPlayType(mediaType);
|
|
return support === "probably" || support === "maybe";
|
|
}
|
|
|
|
function getCachedSource(element) {
|
|
return element?.dataset?.sourceUrl || element?.src;
|
|
}
|
|
|
|
function scheduleNextFrame(controller) {
|
|
if (controller.cancelled || !controller.decoder) {
|
|
return;
|
|
}
|
|
controller.decoder
|
|
.decode()
|
|
.then(({ image, complete }) => {
|
|
if (controller.cancelled) {
|
|
image.close?.();
|
|
return;
|
|
}
|
|
controller.bitmap?.close?.();
|
|
createImageBitmap(image)
|
|
.then((bitmap) => {
|
|
controller.bitmap = bitmap;
|
|
draw();
|
|
})
|
|
.finally(() => image.close?.());
|
|
|
|
const durationMicros = image.duration || 0;
|
|
const delay = durationMicros > 0 ? durationMicros / 1000 : 100;
|
|
const hasMore = !complete;
|
|
controller.timeout = setTimeout(() => {
|
|
if (controller.cancelled) {
|
|
return;
|
|
}
|
|
if (hasMore) {
|
|
scheduleNextFrame(controller);
|
|
} else {
|
|
controller.decoder.reset();
|
|
scheduleNextFrame(controller);
|
|
}
|
|
}, delay);
|
|
})
|
|
.catch(() => {
|
|
// If decoding fails, clear animated cache so static fallback is used next render
|
|
animatedCache.delete(controller.id);
|
|
animationFailures.set(controller.id, Date.now());
|
|
});
|
|
}
|
|
|
|
function applyMediaSettings(element, asset) {
|
|
if (!isVideoElement(element)) {
|
|
return;
|
|
}
|
|
startVideoPlayback(element, asset);
|
|
}
|
|
|
|
function startVideoPlayback(element, asset) {
|
|
const playbackState = getVideoPlaybackState(element);
|
|
const nextSpeed = asset.speed ?? 1;
|
|
const effectiveSpeed = Math.max(nextSpeed, 0.01);
|
|
if (element.playbackRate !== effectiveSpeed) {
|
|
element.playbackRate = effectiveSpeed;
|
|
}
|
|
const volume = applyMediaVolume(element, asset);
|
|
const shouldUnmute = volume > 0;
|
|
element.muted = true;
|
|
|
|
if (effectiveSpeed === 0) {
|
|
element.pause();
|
|
playbackState.playRequested = false;
|
|
playbackState.unmuteOnPlay = false;
|
|
return;
|
|
}
|
|
|
|
element.play();
|
|
|
|
if (shouldUnmute) {
|
|
if (!element.paused && element.readyState >= 2) {
|
|
element.muted = false;
|
|
} else {
|
|
playbackState.unmuteOnPlay = true;
|
|
}
|
|
}
|
|
|
|
if (element.paused || element.ended) {
|
|
if (!playbackState.playRequested) {
|
|
playbackState.playRequested = true;
|
|
const playPromise = element.play();
|
|
if (playPromise?.catch) {
|
|
playPromise.catch(() => {
|
|
playbackState.playRequested = false;
|
|
});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
function startRenderLoop() {
|
|
if (renderIntervalId) {
|
|
return;
|
|
}
|
|
renderIntervalId = setInterval(() => {
|
|
draw();
|
|
}, MIN_FRAME_TIME);
|
|
}
|
|
|
|
globalThis.addEventListener("resize", () => {
|
|
resizeCanvas();
|
|
});
|
|
|
|
fetchCanvasSettings().finally(() => {
|
|
resizeCanvas();
|
|
startRenderLoop();
|
|
connect();
|
|
});
|