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Vance IngallsandClaude Sonnet 5
8d48a6f52f
An audio element carrying `data-audio-group` no longer lands its gain on the master bus directly — it feeds a per-group `GainNode` (built lazily on first use, one per group id) which itself feeds master, so members of the same group sum before the ear, ready for a group-level FX chain and volume/mute in later steps. An id with no matching `<hf-audio-group>` element still gets a plain, unprocessed bus rather than losing the track. The group's own chain and volume lane are wired through the same `attachElementFxChain`/`scheduleVolumeLane` every element already uses, against the group's clock — composition time (design doc §1.3), since a group has no `data-start` and a missing one parses as 0. The bus persists across `stopAll()` (mirroring `_masterGain`'s own lifecycle) so replaying a group does not rebuild its chain; only `destroy()` disposes it. Render is untouched — stays flat until B4; `audio-groups` is still a 0% canary so nothing ships this to a real composition without hand-authoring `data-audio-group`. Also: `audioGroupOf` (B1) crashed on any element lacking a real `tagName`/ `getAttribute` — exactly the shape of most `HTMLMediaElement` test doubles in this suite, including this file's own `mockEl`. Made it tolerant, same style as `readChain`'s existing guard in `runtime/audioFx.ts`. `schedulePlayback` was already 110 lines pre-existing before this diff; extracted `resolveDestination` and `handleSourceEnded` to shrink it to 92, then suppressed the remainder (inherently sequential graph wiring, not a decision tree) per the same precedent B2 used on `TimelineLogicalRow`. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
@hyperframes/core
Types, parsers, generators, compiler, linter, runtime, and frame adapters for the Hyperframes video framework.
Install
npm install @hyperframes/core
Most users don't need to install core directly — the CLI, producer, and studio packages depend on it internally.
What's inside
| Module | Description |
|---|---|
| Types | TimelineElement, CompositionSpec, Asset, canvas dimensions, defaults |
| Parsers | parseHtml — extract timeline elements from HTML; parseGsapScript — parse GSAP animations |
| Generators | generateHyperframesHtml — produce valid Hyperframes HTML from a composition spec |
| Compiler | compileTimingAttrs — resolve data-start / data-duration into absolute times |
| Linter | lintHyperframeHtml — validate Hyperframes HTML (missing attributes, overlapping tracks, etc.) |
| Runtime | IIFE script injected into the browser — manages seek, media playback, and the window.__hf protocol |
| Frame Adapters | Pluggable animation drivers (GSAP, Lottie, CSS, or custom) |
Frame Adapters
A frame adapter tells the engine how to seek your animation to a specific frame:
import { createGSAPFrameAdapter } from "@hyperframes/core";
const adapter = createGSAPFrameAdapter({
getTimeline: () => gsap.timeline(),
compositionId: "my-video",
});
Implement FrameAdapter for custom animation runtimes:
import type { FrameAdapter } from "@hyperframes/core";
const myAdapter: FrameAdapter = {
id: "my-adapter",
getDurationFrames: () => 300,
seekFrame: (frame) => {
/* seek your animation */
},
};
Parsing and generating HTML
import { parseHtml, generateHyperframesHtml } from "@hyperframes/core";
const { elements, metadata } = parseHtml(htmlString);
const html = generateHyperframesHtml(spec);
Linting
import { lintHyperframeHtml } from "@hyperframes/core/lint";
const result = lintHyperframeHtml(htmlString);
// result.findings: { severity, message, elementId }[]
Documentation
Full documentation: hyperframes.heygen.com/packages/core
Related packages
@hyperframes/engine— rendering engine that drives the browser@hyperframes/producer— full render pipeline (capture + encode)hyperframes— CLI