mirror of
https://github.com/OpenCut-app/OpenCut.git
synced 2026-07-13 21:52:53 +02:00
refactor not done
This commit is contained in:
Maze Winther
@@ -0,0 +1,348 @@
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import { useRef, useCallback } from "react";
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import {
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TimelineTrack,
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TimelineElement,
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MediaElement,
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TextElement,
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} from "@/types/timeline";
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import { MediaFile } from "@/types/media";
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import { TProject } from "@/types/project";
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interface CachedFrame {
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imageData: ImageData;
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timelineHash: string;
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timestamp: number;
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}
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interface FrameCacheOptions {
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maxCacheSize?: number; // Maximum number of cached frames
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cacheResolution?: number; // Frames per second to cache at
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}
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// Shared singleton cache across hook instances (HMR-safe)
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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const __frameCacheGlobal: any = globalThis as any;
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const __sharedFrameCache: Map<number, CachedFrame> =
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__frameCacheGlobal.__sharedFrameCache ?? new Map<number, CachedFrame>();
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__frameCacheGlobal.__sharedFrameCache = __sharedFrameCache;
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export function useFrameCache(options: FrameCacheOptions = {}) {
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const { maxCacheSize = 300, cacheResolution = 30 } = options; // 10 seconds at 30fps
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const frameCacheRef = useRef(__sharedFrameCache);
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// Generate a hash of the timeline state that affects rendering
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const getTimelineHash = useCallback(
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(
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time: number,
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tracks: TimelineTrack[],
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mediaFiles: MediaFile[],
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activeProject: TProject | null,
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sceneId?: string
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): string => {
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// Get elements that are active at this time
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const activeElements: Array<{
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id: string;
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type: string;
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startTime: number;
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duration: number;
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trimStart: number;
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trimEnd: number;
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mediaId?: string;
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// Text-specific properties
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content?: string;
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fontSize?: number;
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fontFamily?: string;
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color?: string;
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backgroundColor?: string;
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x?: number;
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y?: number;
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rotation?: number;
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opacity?: number;
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}> = [];
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for (const track of tracks) {
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if (track.muted) continue;
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for (const element of track.elements) {
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// Check if element has hidden property (some elements might not have it)
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const isHidden = "hidden" in element ? element.hidden : false;
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if (isHidden) continue;
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const elementStart = element.startTime;
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const elementEnd =
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element.startTime +
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(element.duration - element.trimStart - element.trimEnd);
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if (time >= elementStart && time < elementEnd) {
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if (element.type === "media") {
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const mediaElement = element as MediaElement;
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activeElements.push({
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id: element.id,
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type: element.type,
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startTime: element.startTime,
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duration: element.duration,
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trimStart: element.trimStart,
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trimEnd: element.trimEnd,
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mediaId: mediaElement.mediaId,
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});
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} else if (element.type === "text") {
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const textElement = element as TextElement;
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activeElements.push({
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id: element.id,
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type: element.type,
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startTime: element.startTime,
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duration: element.duration,
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trimStart: element.trimStart,
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trimEnd: element.trimEnd,
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content: textElement.content,
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fontSize: textElement.fontSize,
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fontFamily: textElement.fontFamily,
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color: textElement.color,
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backgroundColor: textElement.backgroundColor,
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x: textElement.x,
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y: textElement.y,
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rotation: textElement.rotation,
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opacity: textElement.opacity,
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});
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}
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}
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}
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}
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// Include project settings that affect rendering
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const projectState = {
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backgroundColor: activeProject?.backgroundColor,
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backgroundType: activeProject?.backgroundType,
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blurIntensity: activeProject?.blurIntensity,
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canvasSize: activeProject?.canvasSize,
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};
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const hash = {
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activeElements,
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projectState,
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sceneId,
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time: Math.floor(time * cacheResolution) / cacheResolution,
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};
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return JSON.stringify(hash);
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},
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[cacheResolution]
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);
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// Check if a frame is cached and valid
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const isFrameCached = useCallback(
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(
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time: number,
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tracks: TimelineTrack[],
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mediaFiles: MediaFile[],
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activeProject: TProject | null,
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sceneId?: string
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): boolean => {
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const frameKey = Math.floor(time * cacheResolution);
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const cached = frameCacheRef.current.get(frameKey);
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if (!cached) return false;
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const currentHash = getTimelineHash(
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time,
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tracks,
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mediaFiles,
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activeProject,
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sceneId
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);
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return cached.timelineHash === currentHash;
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},
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[getTimelineHash, cacheResolution]
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);
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// Get cached frame if available and valid
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const getCachedFrame = useCallback(
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(
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time: number,
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tracks: TimelineTrack[],
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mediaFiles: MediaFile[],
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activeProject: TProject | null,
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sceneId?: string
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): ImageData | null => {
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const frameKey = Math.floor(time * cacheResolution);
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const cached = frameCacheRef.current.get(frameKey);
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if (!cached) {
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return null;
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}
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const currentHash = getTimelineHash(
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time,
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tracks,
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mediaFiles,
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activeProject,
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sceneId
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);
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console.log(cached.timelineHash === currentHash);
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if (cached.timelineHash !== currentHash) {
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// Cache is stale, remove it
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console.log(
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"Cache miss - hash mismatch:",
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JSON.stringify({
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cachedHash: cached.timelineHash.slice(0, 100),
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currentHash: currentHash.slice(0, 100),
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})
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);
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frameCacheRef.current.delete(frameKey);
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return null;
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}
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return cached.imageData;
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},
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[getTimelineHash, cacheResolution]
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);
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// Cache a rendered frame
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const cacheFrame = useCallback(
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(
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time: number,
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imageData: ImageData,
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tracks: TimelineTrack[],
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mediaFiles: MediaFile[],
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activeProject: TProject | null,
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sceneId?: string
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): void => {
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const frameKey = Math.floor(time * cacheResolution);
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const timelineHash = getTimelineHash(
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time,
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tracks,
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mediaFiles,
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activeProject,
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sceneId
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);
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// Enforce cache size limit (LRU eviction)
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if (frameCacheRef.current.size >= maxCacheSize) {
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// Remove oldest entries
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const entries = Array.from(frameCacheRef.current.entries());
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entries.sort((a, b) => a[1].timestamp - b[1].timestamp);
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// Remove oldest 20% of entries
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const toRemove = Math.floor(entries.length * 0.2);
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for (let i = 0; i < toRemove; i++) {
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frameCacheRef.current.delete(entries[i][0]);
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}
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}
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frameCacheRef.current.set(frameKey, {
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imageData,
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timelineHash,
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timestamp: Date.now(),
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});
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},
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[getTimelineHash, cacheResolution, maxCacheSize]
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);
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// Clear cache when timeline changes significantly
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const invalidateCache = useCallback(() => {
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frameCacheRef.current.clear();
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}, []);
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// Get render status for timeline indicator
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const getRenderStatus = useCallback(
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(
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time: number,
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tracks: TimelineTrack[],
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mediaFiles: MediaFile[],
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activeProject: TProject | null,
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sceneId?: string
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): "cached" | "not-cached" => {
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return isFrameCached(time, tracks, mediaFiles, activeProject, sceneId)
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? "cached"
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: "not-cached";
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},
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[isFrameCached]
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);
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// Pre-render frames around current time
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const preRenderNearbyFrames = useCallback(
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async (
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currentTime: number,
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tracks: TimelineTrack[],
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mediaFiles: MediaFile[],
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activeProject: TProject | null,
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renderFunction: (time: number) => Promise<ImageData>,
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sceneId?: string,
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range: number = 3 // seconds
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) => {
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const framesToPreRender: number[] = [];
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// Calculate frames to pre-render (around current time)
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for (
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let offset = -range;
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offset <= range;
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offset += 1 / cacheResolution
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) {
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const time = currentTime + offset;
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if (time < 0) continue;
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if (!isFrameCached(time, tracks, mediaFiles, activeProject, sceneId)) {
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framesToPreRender.push(time);
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}
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}
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// Expand to full 1-second buckets to avoid fragmented tiny cache regions
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const secondsToPreRender = new Set<number>();
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for (const t of framesToPreRender) {
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secondsToPreRender.add(Math.floor(t));
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}
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const expandedTimes: number[] = [];
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for (const s of secondsToPreRender) {
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for (let k = 0; k < cacheResolution; k++) {
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const t = s + k / cacheResolution;
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if (t < 0) continue;
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if (!isFrameCached(t, tracks, mediaFiles, activeProject, sceneId)) {
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expandedTimes.push(t);
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}
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}
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}
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// Sort forward-first near currentTime to improve perceived responsiveness
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expandedTimes.sort((a, b) => {
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const da = a >= currentTime ? a - currentTime : currentTime - a + 1e6;
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const db = b >= currentTime ? b - currentTime : currentTime - b + 1e6;
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return da - db;
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});
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// Cap total scheduled renders to avoid jank (e.g., up to 90 frames)
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const CAP = Math.max(30, Math.min(90, cacheResolution * 3));
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const toSchedule = expandedTimes.slice(0, CAP);
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// Pre-render during idle time
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for (const time of toSchedule) {
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requestIdleCallback(async () => {
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try {
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const imageData = await renderFunction(time);
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cacheFrame(
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time,
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imageData,
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tracks,
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mediaFiles,
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activeProject,
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sceneId
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);
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} catch (error) {
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console.warn(`Pre-render failed for time ${time}:`, error);
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}
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});
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}
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},
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[isFrameCached, cacheFrame, cacheResolution]
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);
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return {
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isFrameCached,
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getCachedFrame,
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cacheFrame,
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invalidateCache,
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getRenderStatus,
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preRenderNearbyFrames,
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cacheSize: frameCacheRef.current.size,
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};
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}
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