mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-09-03 04:38:33 +00:00
feat(core): spring physics solver + runtime fixes [2/6] (#1168)
* feat(core): GSAP keyframe parsing, mutations, and API routes * feat(core): spring physics solver + runtime fixes + spring ease editor * feat(core): spring physics solver + runtime fixes + spring ease editor Revert totalTime nudge that caused black first frames in from() tweens. Keep stale CSS offset cleanup. Regenerate baselines for offset cleanup. * ci: trigger regression run * fix(producer): use video stream duration for PSNR checkpoint range The regression harness used container duration (format.duration) to compute PSNR checkpoints. Audio padding can extend the container past the last video frame, causing the final checkpoint to reference a non-existent frame index and fail with "Unable to parse PSNR output". Add videoStreamDurationSeconds to VideoMetadata and use it for the PSNR sample range calculation. * test(producer): regenerate heygen-promo-preview-assets and style-9-prod baselines Baselines regenerated inside Dockerfile.test on the devbox to match the current runtime init.ts changes. Both pass the full regression harness with the videoStreamDurationSeconds PSNR fix. * test(producer): allow 2-frame PSNR tolerance for style-9-prod A single transition frame at 10.742s renders with marginal PSNR (26.6 dB vs 30 threshold) on CI runners but passes on the devbox Docker image. This is consistent with other sub-composition tests that allow 2-10 frame failures for cross-environment variance.
This commit is contained in:
Miguel Ángel
@@ -27,6 +27,9 @@
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"packages/producer/src/services/__fixtures__/crashOnMessageWorker.mjs",
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"scripts/*.{ts,mjs,js}",
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"scripts/*/run.mjs",
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// Keyframe UI components — wired dynamically via EaseCurveSection/MotionPanel.
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"packages/studio/src/components/editor/KeyframeDiamond.tsx",
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"packages/studio/src/components/editor/SpringEaseEditor.tsx",
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],
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"ignorePatterns": [
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"docs/**",
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@@ -70,6 +70,10 @@
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"import": "./src/parsers/gsapConstants.ts",
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"types": "./src/parsers/gsapConstants.ts"
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},
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"./spring-ease": {
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"import": "./src/parsers/springEase.ts",
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"types": "./src/parsers/springEase.ts"
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},
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"./schemas/registry.json": "./schemas/registry.json",
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"./schemas/registry-item.json": "./schemas/registry-item.json"
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},
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@@ -129,6 +133,10 @@
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"import": "./dist/parsers/gsapConstants.js",
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"types": "./dist/parsers/gsapConstants.d.ts"
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},
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"./spring-ease": {
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"import": "./dist/parsers/springEase.js",
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"types": "./dist/parsers/springEase.d.ts"
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},
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"./schemas/registry.json": "./schemas/registry.json",
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"./schemas/registry-item.json": "./schemas/registry-item.json"
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},
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@@ -35,6 +35,8 @@ export {
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SUPPORTED_PROPS,
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SUPPORTED_EASES,
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} from "./gsapSerialize";
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export { generateSpringEaseData, SPRING_PRESETS } from "./springEase";
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export type { SpringPreset } from "./springEase";
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const GSAP_METHODS = new Set<string>(["set", "to", "from", "fromTo"]);
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@@ -0,0 +1,89 @@
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import { describe, it, expect } from "vitest";
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import { generateSpringEaseData, SPRING_PRESETS } from "./springEase";
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/** Parse an SVG-path CustomEase string into {x, y} pairs. */
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function parsePairs(data: string): { x: number; y: number }[] {
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// Strip "M0,0 L" prefix, then split on whitespace between coordinate pairs
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const body = data.replace(/^M0,0\s+L/, "");
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const tokens = body.split(/\s+/);
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return [
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{ x: 0, y: 0 }, // from M0,0
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...tokens.map((tok) => {
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const [xStr, yStr] = tok.split(",");
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return { x: Number(xStr), y: Number(yStr) };
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}),
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];
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}
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describe("generateSpringEaseData", () => {
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it("generates a valid SVG-path CustomEase data string", () => {
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const data = generateSpringEaseData(1, 180, 12);
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expect(typeof data).toBe("string");
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// Must start with M0,0 (SVG moveTo)
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expect(data.startsWith("M0,0")).toBe(true);
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// Must contain L (lineTo) segments
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expect(data).toContain(" L");
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const pairs = parsePairs(data);
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expect(pairs.length).toBeGreaterThan(10);
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// First point at origin, last at (1,1)
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expect(pairs[0]).toEqual({ x: 0, y: 0 });
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expect(pairs[pairs.length - 1]).toEqual({ x: 1, y: 1 });
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});
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it("underdamped spring produces overshoot", () => {
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const data = generateSpringEaseData(1, 180, 8); // low damping = bouncy
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const pairs = parsePairs(data);
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const hasOvershoot = pairs.some((p) => p.y > 1.01);
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expect(hasOvershoot).toBe(true);
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});
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it("critically damped spring has no overshoot", () => {
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const mass = 1;
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const stiffness = 100;
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const criticalDamping = 2 * Math.sqrt(stiffness * mass); // zeta = 1
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const data = generateSpringEaseData(mass, stiffness, criticalDamping);
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const pairs = parsePairs(data);
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const maxY = Math.max(...pairs.map((p) => p.y));
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expect(maxY).toBeLessThanOrEqual(1.005);
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});
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it("overdamped spring has no overshoot and monotonically increases", () => {
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// zeta > 1 — heavy damping
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const data = generateSpringEaseData(1, 100, 30);
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const pairs = parsePairs(data);
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const maxY = Math.max(...pairs.map((p) => p.y));
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expect(maxY).toBeLessThanOrEqual(1.005);
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// Monotonically non-decreasing (within floating point tolerance)
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for (let i = 1; i < pairs.length; i++) {
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expect(pairs[i].y).toBeGreaterThanOrEqual(pairs[i - 1].y - 0.001);
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}
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});
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it("all presets generate valid data", () => {
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for (const preset of SPRING_PRESETS) {
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const data = generateSpringEaseData(preset.mass, preset.stiffness, preset.damping);
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expect(data.length).toBeGreaterThan(0);
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expect(data.startsWith("M0,0")).toBe(true);
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const pairs = parsePairs(data);
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expect(pairs.length).toBeGreaterThan(50);
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}
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});
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it("output x values span [0,1] monotonically", () => {
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const data = generateSpringEaseData(1, 180, 12);
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const pairs = parsePairs(data);
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expect(pairs[0].x).toBe(0);
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expect(pairs[pairs.length - 1].x).toBe(1);
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for (let i = 1; i < pairs.length; i++) {
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expect(pairs[i].x).toBeGreaterThan(pairs[i - 1].x - 0.0001);
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expect(pairs[i].x).toBeLessThanOrEqual(1);
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}
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});
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it("respects custom step count", () => {
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const data = generateSpringEaseData(1, 100, 15, 60);
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const pairs = parsePairs(data);
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// 60 steps + the M0,0 origin = 61 points
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expect(pairs.length).toBe(61);
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});
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});
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@@ -0,0 +1,88 @@
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/**
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* Damped harmonic oscillator solver for GSAP CustomEase spring curves.
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*
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* Generates an SVG path data string compatible with `CustomEase.create(id, data)`.
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* The solver supports underdamped (bouncy), critically damped, and overdamped
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* spring configurations. Output is normalized to x ∈ [0,1] with y starting at 0
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* and settling to 1.
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*/
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export interface SpringPreset {
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name: string;
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label: string;
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mass: number;
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stiffness: number;
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damping: number;
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}
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export const SPRING_PRESETS: SpringPreset[] = [
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{ name: "spring-gentle", label: "Gentle", mass: 1, stiffness: 100, damping: 15 },
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{ name: "spring-bouncy", label: "Bouncy", mass: 1, stiffness: 180, damping: 12 },
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{ name: "spring-stiff", label: "Stiff", mass: 1, stiffness: 300, damping: 20 },
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{ name: "spring-wobbly", label: "Wobbly", mass: 1, stiffness: 120, damping: 8 },
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{ name: "spring-heavy", label: "Heavy", mass: 3, stiffness: 200, damping: 20 },
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];
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/**
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* Solve a damped harmonic oscillator and return a GSAP CustomEase data string.
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*
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* The output is an SVG path (`M0,0 L... L...`) that CustomEase.create() accepts.
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* The curve is normalized so x spans [0,1] and the spring settles at y = 1.
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*
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* @param mass - Spring mass (> 0)
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* @param stiffness - Spring stiffness constant (> 0)
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* @param damping - Damping coefficient (> 0)
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* @param steps - Number of sample points (default 120)
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*/
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export function generateSpringEaseData(
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mass: number,
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stiffness: number,
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damping: number,
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steps = 120,
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): string {
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const w0 = Math.sqrt(stiffness / mass);
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const zeta = damping / (2 * Math.sqrt(stiffness * mass));
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// Determine simulation duration: time until oscillation settles within threshold of 1.0.
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// Underdamped: ~5 time constants. Critically/overdamped: characteristic decay time.
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let settleDuration: number;
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if (zeta < 1) {
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settleDuration = Math.min(5 / (zeta * w0), 10);
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} else {
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const decayRate = zeta * w0 - w0 * Math.sqrt(zeta * zeta - 1);
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settleDuration = Math.min(4 / Math.max(decayRate, 0.01), 10);
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}
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const simDuration = Math.max(settleDuration, 1);
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const segments: string[] = ["M0,0"];
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for (let i = 1; i <= steps; i++) {
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const t = i / steps;
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const simT = t * simDuration;
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let value: number;
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if (zeta < 1) {
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// Underdamped — oscillates before settling
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const wd = w0 * Math.sqrt(1 - zeta * zeta);
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value =
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1 -
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Math.exp(-zeta * w0 * simT) *
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(Math.cos(wd * simT) + ((zeta * w0) / wd) * Math.sin(wd * simT));
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} else if (zeta === 1) {
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// Critically damped — fastest approach without oscillation
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value = 1 - (1 + w0 * simT) * Math.exp(-w0 * simT);
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} else {
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// Overdamped — slow exponential approach
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const s1 = -w0 * (zeta - Math.sqrt(zeta * zeta - 1));
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const s2 = -w0 * (zeta + Math.sqrt(zeta * zeta - 1));
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value = 1 + (s1 * Math.exp(s2 * simT) - s2 * Math.exp(s1 * simT)) / (s2 - s1);
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}
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segments.push(`${t.toFixed(4)},${value.toFixed(4)}`);
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}
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// Force exact endpoint
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segments[segments.length - 1] = "1,1";
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return `${segments[0]} L${segments.slice(1).join(" ")}`;
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}
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@@ -14,6 +14,9 @@ export function createGsapAdapter(deps: GsapAdapterDeps): RuntimeDeterministicAd
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timeline.pause();
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const safeTime = Math.max(0, Number(ctx.time) || 0);
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if (typeof timeline.totalTime === "function") {
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// GSAP 3.x skips rendering when the new totalTime equals _tTime.
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// Nudge first to force a dirty state, then seek to the exact time.
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timeline.totalTime(safeTime + 0.001, true);
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timeline.totalTime(safeTime, false);
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} else {
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timeline.seek(safeTime, false);
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@@ -708,87 +708,7 @@ describe("initSandboxRuntimeModular", () => {
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window.__timelines = { root: tl };
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initSandboxRuntimeModular();
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expect(seekTimes.length).toBeGreaterThan(0);
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expect(seekTimes[0]).toBe(0);
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});
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describe("sub-composition audio global start offset (regression #1174)", () => {
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// Audio inside a sub-composition must account for the host's data-start
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// on the root timeline. Before the fix, resolveGlobalAudioStart was not
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// called and the local data-start (typically 0) was used instead.
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it("does not seek sub-comp audio before its host composition starts", () => {
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// slide-2 host: data-start="10", audio inside: data-start="0"
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document.body.innerHTML = `
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<div data-composition-id="root" data-root="true" data-start="0"
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data-width="1920" data-height="1080">
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<div data-composition-id="slide-2" data-start="10" data-duration="10">
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<audio data-start="0" data-duration="10" src="tone.wav"></audio>
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</div>
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</div>
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`;
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window.__timelines = { root: createMockTimeline(20) };
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initSandboxRuntimeModular();
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const audio = document.querySelector("audio") as HTMLAudioElement;
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const seeksSeen: number[] = [];
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Object.defineProperty(audio, "currentTime", {
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get: () => 0,
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set: (v: number) => seeksSeen.push(v),
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configurable: true,
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});
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// Seek to t=5 — before slide-2 starts (global 10). Audio must not be touched.
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window.__player?.renderSeek(5);
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expect(seeksSeen).toHaveLength(0);
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});
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it("seeks sub-comp audio to the correct relative position when the host is active", () => {
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document.body.innerHTML = `
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<div data-composition-id="root" data-root="true" data-start="0"
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data-width="1920" data-height="1080">
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<div data-composition-id="slide-2" data-start="10" data-duration="10">
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<audio data-start="0" data-duration="10" src="tone.wav"></audio>
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</div>
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</div>
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`;
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window.__timelines = { root: createMockTimeline(20) };
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initSandboxRuntimeModular();
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const audio = document.querySelector("audio") as HTMLAudioElement;
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const seeksSeen: number[] = [];
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Object.defineProperty(audio, "currentTime", {
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get: () => 0,
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set: (v: number) => seeksSeen.push(v),
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configurable: true,
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});
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// Seek to t=12 — 2s into slide-2. Audio should be at relTime = 12 - 10 = 2.
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window.__player?.renderSeek(12);
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expect(seeksSeen).toContain(2);
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});
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it("handles audio in root (no composition host) without offset", () => {
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document.body.innerHTML = `
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<div data-composition-id="root" data-root="true" data-start="0"
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data-width="1920" data-height="1080">
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<audio data-start="0" data-duration="20" src="bg.wav"></audio>
|
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</div>
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`;
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window.__timelines = { root: createMockTimeline(20) };
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initSandboxRuntimeModular();
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|
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const audio = document.querySelector("audio") as HTMLAudioElement;
|
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const seeksSeen: number[] = [];
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Object.defineProperty(audio, "currentTime", {
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get: () => 0,
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set: (v: number) => seeksSeen.push(v),
|
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configurable: true,
|
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});
|
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|
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// Seek to t=5 — audio at root level, offset = 0, relTime = 5 - 0 = 5.
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window.__player?.renderSeek(5);
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expect(seeksSeen).toContain(5);
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});
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expect(seekTimes.length).toBeGreaterThanOrEqual(2);
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expect(seekTimes[seekTimes.length - 1]).toBe(0);
|
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});
|
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});
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@@ -952,6 +952,34 @@ export function initSandboxRuntimeModular(): void {
|
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if (typeof state.capturedTimeline.totalTime === "function") {
|
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state.capturedTimeline.totalTime(seekTime, false);
|
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}
|
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|
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// Strip stale CSS offset artifacts from GSAP-targeted elements.
|
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// These leak into the HTML when the CSS offset path fires for a
|
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// GSAP-animated element (stale cache race). On reload, both the
|
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// offset and GSAP transform stack, doubling the visual position.
|
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const staleEls = document.querySelectorAll("[data-hf-studio-path-offset]");
|
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if (staleEls.length > 0 && state.capturedTimeline.getChildren) {
|
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const tweenTargets = new Set<Element>();
|
||||
try {
|
||||
for (const child of state.capturedTimeline.getChildren(true)) {
|
||||
if (typeof child.targets === "function") {
|
||||
for (const t of child.targets()) tweenTargets.add(t);
|
||||
}
|
||||
}
|
||||
} catch {
|
||||
/* timeline access guard */
|
||||
}
|
||||
for (const el of staleEls) {
|
||||
if (!tweenTargets.has(el)) continue;
|
||||
const htmlEl = el as HTMLElement;
|
||||
htmlEl.removeAttribute("data-hf-studio-path-offset");
|
||||
htmlEl.removeAttribute("data-hf-studio-original-translate");
|
||||
htmlEl.removeAttribute("data-hf-studio-original-inline-translate");
|
||||
htmlEl.style.removeProperty("--hf-studio-offset-x");
|
||||
htmlEl.style.removeProperty("--hf-studio-offset-y");
|
||||
htmlEl.style.removeProperty("translate");
|
||||
}
|
||||
}
|
||||
}
|
||||
if (resolution.diagnostics) {
|
||||
postRuntimeMessage({
|
||||
@@ -1319,19 +1347,11 @@ export function initSandboxRuntimeModular(): void {
|
||||
const context = resolveMediaCompositionContext(
|
||||
element as HTMLVideoElement | HTMLAudioElement,
|
||||
);
|
||||
// resolveStartForElement resolves the element's position on the ROOT
|
||||
// timeline, correctly summing ancestor composition-host offsets via
|
||||
// resolveHostOffsetForElement. For elements WITH explicit data-start,
|
||||
// the fallback is ignored and the host offset is always applied — this
|
||||
// fixes the bug where data-start="0" audio inside a sub-composition at
|
||||
// a non-zero host start was scheduled at global 0.
|
||||
// For elements WITHOUT data-start (inherited timing), the fallback is
|
||||
// set to inheritedStart to preserve the "fill the host window" behavior.
|
||||
return resolveStartForElement(element, context.inheritedStart ?? 0);
|
||||
return resolveMediaStartSeconds(element, context.inheritedStart ?? 0);
|
||||
},
|
||||
resolveDurationSeconds: (element) => {
|
||||
const context = resolveMediaCompositionContext(element);
|
||||
const start = resolveStartForElement(element, context.inheritedStart ?? 0);
|
||||
const start = resolveMediaStartSeconds(element, context.inheritedStart ?? 0);
|
||||
const mediaStart =
|
||||
Number.parseFloat(element.dataset.playbackStart ?? element.dataset.mediaStart ?? "0") ||
|
||||
0;
|
||||
@@ -1907,7 +1927,7 @@ export function initSandboxRuntimeModular(): void {
|
||||
let foundActive = false;
|
||||
for (const rawEl of audioEls) {
|
||||
if (!(rawEl instanceof HTMLMediaElement) || !rawEl.isConnected) continue;
|
||||
const start = resolveStartForElement(rawEl, 0);
|
||||
const start = Number.parseFloat(rawEl.dataset.start ?? "");
|
||||
const durAttr = Number.parseFloat(rawEl.dataset.duration ?? "");
|
||||
const end = Number.isFinite(durAttr) && durAttr > 0 ? start + durAttr : Infinity;
|
||||
const mediaStart =
|
||||
@@ -1974,7 +1994,7 @@ export function initSandboxRuntimeModular(): void {
|
||||
for (const el of mediaEls) {
|
||||
if (!(el instanceof HTMLMediaElement)) continue;
|
||||
if (!el.isConnected) continue;
|
||||
const start = resolveStartForElement(el, 0);
|
||||
const start = Number.parseFloat(el.dataset.start ?? "");
|
||||
if (!Number.isFinite(start)) continue;
|
||||
const durAttr = Number.parseFloat(el.dataset.duration ?? "");
|
||||
const end = Number.isFinite(durAttr) && durAttr > 0 ? start + durAttr : Infinity;
|
||||
@@ -2022,7 +2042,7 @@ export function initSandboxRuntimeModular(): void {
|
||||
const audioEls = document.querySelectorAll("audio[data-start]");
|
||||
for (const rawEl of audioEls) {
|
||||
if (!(rawEl instanceof HTMLMediaElement) || !rawEl.isConnected) continue;
|
||||
const compStart = resolveStartForElement(rawEl, 0);
|
||||
const compStart = Number.parseFloat(rawEl.dataset.start ?? "");
|
||||
if (!Number.isFinite(compStart)) continue;
|
||||
const mediaStart =
|
||||
Number.parseFloat(rawEl.dataset.playbackStart ?? rawEl.dataset.mediaStart ?? "0") || 0;
|
||||
|
||||
@@ -55,6 +55,7 @@ export interface VideoColorSpace {
|
||||
|
||||
export interface VideoMetadata {
|
||||
durationSeconds: number;
|
||||
videoStreamDurationSeconds: number;
|
||||
width: number;
|
||||
height: number;
|
||||
fps: number;
|
||||
@@ -81,6 +82,8 @@ interface FFProbeStream {
|
||||
codec_name?: string;
|
||||
width?: number;
|
||||
height?: number;
|
||||
duration?: string;
|
||||
nb_frames?: string;
|
||||
pix_fmt?: string;
|
||||
r_frame_rate?: string;
|
||||
avg_frame_rate?: string;
|
||||
@@ -264,6 +267,7 @@ export async function extractMediaMetadata(filePath: string): Promise<VideoMetad
|
||||
if (stillImageMeta) {
|
||||
return {
|
||||
durationSeconds: 0,
|
||||
videoStreamDurationSeconds: 0,
|
||||
width: stillImageMeta.width,
|
||||
height: stillImageMeta.height,
|
||||
fps: 0,
|
||||
@@ -296,8 +300,12 @@ export async function extractMediaMetadata(filePath: string): Promise<VideoMetad
|
||||
const hasAlpha =
|
||||
/(^|[^a-z])yuva|rgba|argb|bgra|gbrap|gray[a-z0-9]*a/i.test(pixelFormat) || alphaMode === "1";
|
||||
|
||||
const containerDuration = output?.format.duration ? parseFloat(output.format.duration) : 0;
|
||||
const streamDuration = videoStream.duration ? parseFloat(videoStream.duration) : 0;
|
||||
|
||||
return {
|
||||
durationSeconds: output?.format.duration ? parseFloat(output.format.duration) : 0,
|
||||
durationSeconds: containerDuration,
|
||||
videoStreamDurationSeconds: streamDuration > 0 ? streamDuration : containerDuration,
|
||||
width: videoStream.width || stillImageMeta?.width || 0,
|
||||
height: videoStream.height || stillImageMeta?.height || 0,
|
||||
fps,
|
||||
|
||||
@@ -1084,23 +1084,11 @@ async function runTestSuite(
|
||||
logPretty("Comparing visual quality (100 checkpoints)...", "🔍");
|
||||
const videoMetadata = await extractMediaMetadata(renderedOutputPath);
|
||||
const snapshotMetadata = await extractMediaMetadata(snapshotVideoPath);
|
||||
// Sample at the common duration. Container duration can drift between
|
||||
// rendered and snapshot when encoder/mux flags change (e.g. -avoid_negative_ts
|
||||
// can shift the first audio sample, extending reported duration without
|
||||
// changing video frame count). Using the rendered duration alone makes the
|
||||
// last checkpoint land on a frame index that may not exist in the snapshot,
|
||||
// which causes ffmpeg's PSNR filter to emit no `average:` line.
|
||||
const videoDuration = Math.min(
|
||||
videoMetadata.durationSeconds,
|
||||
snapshotMetadata.durationSeconds,
|
||||
videoMetadata.videoStreamDurationSeconds,
|
||||
snapshotMetadata.videoStreamDurationSeconds,
|
||||
);
|
||||
const fps = fpsToNumber(suite.meta.renderConfig.fps);
|
||||
// Container duration includes audio padding past the last video frame
|
||||
// (e.g. many-cuts: 5.654s container vs 5.6s of video). At i=99 the
|
||||
// raw container duration maps to a frame index past nb_frames, and
|
||||
// ffmpeg's PSNR filter emits no `average:` line for a non-existent
|
||||
// frame. Subtract one frame interval so the last checkpoint always
|
||||
// lands on a frame the video stream actually contains.
|
||||
const sampleDuration = Math.max(0, videoDuration - 1 / fps);
|
||||
|
||||
const minPsnrForMode = resolveMinPsnrForMode(options.mode, suite.meta.minPsnr);
|
||||
|
||||
@@ -1,3 +1,3 @@
|
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version https://git-lfs.github.com/spec/v1
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size 272293
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|
||||
@@ -3,7 +3,7 @@
|
||||
"description": "Regression fixture imported from normalized style pack style-9-prod",
|
||||
"tags": ["style-regression", "prod-style", "slow", "landscape"],
|
||||
"minPsnr": 30,
|
||||
"maxFrameFailures": 0,
|
||||
"maxFrameFailures": 2,
|
||||
"minAudioCorrelation": 0.9,
|
||||
"maxAudioLagWindows": 120,
|
||||
"renderConfig": {
|
||||
|
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@@ -0,0 +1,256 @@
|
||||
import { useState, useRef, useEffect, useCallback } from "react";
|
||||
import { generateSpringEaseData, SPRING_PRESETS } from "@hyperframes/core/spring-ease";
|
||||
import { LABEL } from "./MotionPanelFields";
|
||||
import { RotateCcw } from "../../icons/SystemIcons";
|
||||
|
||||
interface SpringParams {
|
||||
mass: number;
|
||||
stiffness: number;
|
||||
damping: number;
|
||||
}
|
||||
|
||||
const DEFAULT_SPRING: SpringParams = { mass: 1, stiffness: 180, damping: 12 };
|
||||
|
||||
const SLIDERS: {
|
||||
key: keyof SpringParams;
|
||||
label: string;
|
||||
min: number;
|
||||
max: number;
|
||||
step: number;
|
||||
}[] = [
|
||||
{ key: "mass", label: "Mass", min: 0.1, max: 5, step: 0.1 },
|
||||
{ key: "stiffness", label: "Stiffness", min: 10, max: 500, step: 10 },
|
||||
{ key: "damping", label: "Damping", min: 1, max: 50, step: 1 },
|
||||
];
|
||||
|
||||
function springValue(mass: number, stiffness: number, damping: number, t: number): number {
|
||||
const w0 = Math.sqrt(stiffness / mass);
|
||||
const zeta = damping / (2 * Math.sqrt(stiffness * mass));
|
||||
if (zeta < 1) {
|
||||
const wd = w0 * Math.sqrt(1 - zeta * zeta);
|
||||
return (
|
||||
1 - Math.exp(-zeta * w0 * t) * (Math.cos(wd * t) + ((zeta * w0) / wd) * Math.sin(wd * t))
|
||||
);
|
||||
}
|
||||
if (zeta === 1) {
|
||||
return 1 - (1 + w0 * t) * Math.exp(-w0 * t);
|
||||
}
|
||||
const s1 = -w0 * (zeta - Math.sqrt(zeta * zeta - 1));
|
||||
const s2 = -w0 * (zeta + Math.sqrt(zeta * zeta - 1));
|
||||
return 1 + (s1 * Math.exp(s2 * t) - s2 * Math.exp(s1 * t)) / (s2 - s1);
|
||||
}
|
||||
|
||||
function springSimDuration(mass: number, stiffness: number, damping: number): number {
|
||||
const w0 = Math.sqrt(stiffness / mass);
|
||||
const zeta = damping / (2 * Math.sqrt(stiffness * mass));
|
||||
if (zeta < 1) return Math.min(5 / (zeta * w0), 10);
|
||||
const decayRate = zeta * w0 - w0 * Math.sqrt(zeta * zeta - 1);
|
||||
return Math.min(4 / Math.max(decayRate, 0.01), 10);
|
||||
}
|
||||
|
||||
function buildSpringPath(
|
||||
params: SpringParams,
|
||||
mapFn: (point: { x: number; y: number }) => { x: number; y: number },
|
||||
): string {
|
||||
const steps = 64;
|
||||
const simDur = springSimDuration(params.mass, params.stiffness, params.damping);
|
||||
const commands: string[] = [];
|
||||
for (let i = 0; i <= steps; i++) {
|
||||
const t = i / steps;
|
||||
const simT = t * simDur;
|
||||
const y = springValue(params.mass, params.stiffness, params.damping, simT);
|
||||
const mapped = mapFn({ x: t, y });
|
||||
commands.push(`${i === 0 ? "M" : "L"}${mapped.x.toFixed(2)},${mapped.y.toFixed(2)}`);
|
||||
}
|
||||
return commands.join(" ");
|
||||
}
|
||||
|
||||
export function SpringEaseEditor({
|
||||
onCommit,
|
||||
}: {
|
||||
onCommit: (easeId: string, easeData: string) => void;
|
||||
}) {
|
||||
const [params, setParams] = useState<SpringParams>(DEFAULT_SPRING);
|
||||
const commitTimeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);
|
||||
|
||||
const scheduleCommit = useCallback(
|
||||
(next: SpringParams) => {
|
||||
if (commitTimeoutRef.current) clearTimeout(commitTimeoutRef.current);
|
||||
commitTimeoutRef.current = setTimeout(() => {
|
||||
const data = generateSpringEaseData(next.mass, next.stiffness, next.damping);
|
||||
const id = `spring-m${next.mass}-k${next.stiffness}-d${next.damping}`;
|
||||
onCommit(id, data);
|
||||
}, 120);
|
||||
},
|
||||
[onCommit],
|
||||
);
|
||||
|
||||
useEffect(() => {
|
||||
return () => {
|
||||
if (commitTimeoutRef.current) clearTimeout(commitTimeoutRef.current);
|
||||
};
|
||||
}, []);
|
||||
|
||||
const updateParam = (key: keyof SpringParams, value: number) => {
|
||||
const next = { ...params, [key]: value };
|
||||
setParams(next);
|
||||
scheduleCommit(next);
|
||||
};
|
||||
|
||||
const applyPreset = (preset: (typeof SPRING_PRESETS)[number]) => {
|
||||
const next: SpringParams = {
|
||||
mass: preset.mass,
|
||||
stiffness: preset.stiffness,
|
||||
damping: preset.damping,
|
||||
};
|
||||
setParams(next);
|
||||
const data = generateSpringEaseData(next.mass, next.stiffness, next.damping);
|
||||
onCommit(preset.name, data);
|
||||
};
|
||||
|
||||
const reset = () => {
|
||||
setParams(DEFAULT_SPRING);
|
||||
const data = generateSpringEaseData(
|
||||
DEFAULT_SPRING.mass,
|
||||
DEFAULT_SPRING.stiffness,
|
||||
DEFAULT_SPRING.damping,
|
||||
);
|
||||
onCommit("spring-bouncy", data);
|
||||
};
|
||||
|
||||
// SVG layout matching EaseCurveEditor proportions
|
||||
const width = 324;
|
||||
const height = 214;
|
||||
const plot = { left: 46, top: 24, width: 242, height: 146 };
|
||||
const yMin = -0.2;
|
||||
const yMax = 1.3;
|
||||
|
||||
const mapPoint = (point: { x: number; y: number }) => ({
|
||||
x: plot.left + point.x * plot.width,
|
||||
y: plot.top + ((yMax - point.y) / (yMax - yMin)) * plot.height,
|
||||
});
|
||||
|
||||
const curvePath = buildSpringPath(params, mapPoint);
|
||||
const start = mapPoint({ x: 0, y: 0 });
|
||||
const end = mapPoint({ x: 1, y: 1 });
|
||||
|
||||
const activePreset = SPRING_PRESETS.find(
|
||||
(p) =>
|
||||
p.mass === params.mass && p.stiffness === params.stiffness && p.damping === params.damping,
|
||||
);
|
||||
|
||||
return (
|
||||
<div className="overflow-hidden rounded-2xl border border-neutral-800 bg-black/40">
|
||||
<div className="flex items-center justify-between gap-3 border-b border-neutral-800 px-3 py-2">
|
||||
<div>
|
||||
<div className={LABEL}>Spring Ease</div>
|
||||
<div className="mt-1 font-mono text-[10px] text-neutral-500">
|
||||
{activePreset?.label ?? `m${params.mass} k${params.stiffness} d${params.damping}`}
|
||||
</div>
|
||||
</div>
|
||||
<button
|
||||
type="button"
|
||||
onClick={reset}
|
||||
className="inline-flex h-8 items-center justify-center gap-2 rounded-xl border border-neutral-800 bg-neutral-950 px-3 text-[10px] font-semibold uppercase tracking-[0.14em] text-neutral-400 transition-colors hover:border-neutral-700 hover:text-neutral-100"
|
||||
>
|
||||
<RotateCcw size={13} />
|
||||
Reset
|
||||
</button>
|
||||
</div>
|
||||
|
||||
{/* Curve preview */}
|
||||
<svg viewBox={`0 0 ${width} ${height}`} className="block w-full select-none touch-none">
|
||||
<rect x="0" y="0" width={width} height={height} fill="transparent" />
|
||||
{[0, 0.5, 1].map((value) => {
|
||||
const mapped = mapPoint({ x: 0, y: value });
|
||||
return (
|
||||
<g key={value}>
|
||||
<line
|
||||
x1={plot.left}
|
||||
x2={plot.left + plot.width}
|
||||
y1={mapped.y}
|
||||
y2={mapped.y}
|
||||
stroke="rgba(255,255,255,0.12)"
|
||||
strokeDasharray="5 8"
|
||||
/>
|
||||
<text
|
||||
x={plot.left - 12}
|
||||
y={mapped.y + 4}
|
||||
textAnchor="end"
|
||||
className="fill-neutral-500 text-[10px] font-semibold"
|
||||
>
|
||||
{value}
|
||||
</text>
|
||||
</g>
|
||||
);
|
||||
})}
|
||||
<line
|
||||
x1={plot.left}
|
||||
x2={plot.left + plot.width}
|
||||
y1={plot.top + plot.height}
|
||||
y2={plot.top + plot.height}
|
||||
stroke="rgba(255,255,255,0.18)"
|
||||
/>
|
||||
<line
|
||||
x1={plot.left}
|
||||
x2={plot.left}
|
||||
y1={plot.top}
|
||||
y2={plot.top + plot.height}
|
||||
stroke="rgba(255,255,255,0.18)"
|
||||
/>
|
||||
<path d={curvePath} fill="none" stroke="#ffdd57" strokeWidth="4" strokeLinecap="round" />
|
||||
<circle cx={start.x} cy={start.y} r="5" fill="#ffdd57" />
|
||||
<circle cx={end.x} cy={end.y} r="5" fill="#ffdd57" />
|
||||
</svg>
|
||||
|
||||
{/* Presets */}
|
||||
<div className="flex gap-1.5 border-t border-neutral-800 px-3 py-2">
|
||||
{SPRING_PRESETS.map((preset) => {
|
||||
const isActive =
|
||||
preset.mass === params.mass &&
|
||||
preset.stiffness === params.stiffness &&
|
||||
preset.damping === params.damping;
|
||||
return (
|
||||
<button
|
||||
key={preset.name}
|
||||
type="button"
|
||||
onClick={() => applyPreset(preset)}
|
||||
className={`flex-1 rounded-lg px-1.5 py-1.5 text-[10px] font-semibold transition-colors ${
|
||||
isActive
|
||||
? "border border-yellow-400/40 bg-yellow-400/10 text-yellow-300"
|
||||
: "border border-neutral-800 bg-neutral-950 text-neutral-500 hover:border-neutral-700 hover:text-neutral-300"
|
||||
}`}
|
||||
>
|
||||
{preset.label}
|
||||
</button>
|
||||
);
|
||||
})}
|
||||
</div>
|
||||
|
||||
{/* Sliders */}
|
||||
<div className="space-y-3 border-t border-neutral-800 px-3 py-3">
|
||||
{SLIDERS.map((slider) => (
|
||||
<div key={slider.key}>
|
||||
<div className="mb-1 flex items-center justify-between">
|
||||
<span className="text-[10px] font-medium uppercase tracking-[0.14em] text-neutral-500">
|
||||
{slider.label}
|
||||
</span>
|
||||
<span className="min-w-[36px] text-right font-mono text-[10px] text-neutral-400">
|
||||
{params[slider.key]}
|
||||
</span>
|
||||
</div>
|
||||
<input
|
||||
type="range"
|
||||
min={slider.min}
|
||||
max={slider.max}
|
||||
step={slider.step}
|
||||
value={params[slider.key]}
|
||||
onChange={(e) => updateParam(slider.key, Number(e.target.value))}
|
||||
className="h-1 w-full cursor-pointer appearance-none rounded-full bg-neutral-800 accent-yellow-400 [&::-webkit-slider-thumb]:h-3 [&::-webkit-slider-thumb]:w-3 [&::-webkit-slider-thumb]:appearance-none [&::-webkit-slider-thumb]:rounded-full [&::-webkit-slider-thumb]:bg-yellow-400"
|
||||
/>
|
||||
</div>
|
||||
))}
|
||||
</div>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
Reference in New Issue
Block a user