框架适配器

type FrameAdapterContext = {
  compositionId: string;
  fps: number;
  width: number;
  height: number;
  rootElement?: HTMLElement;
};

type FrameAdapter = {
  id: string;
  init?: (ctx: FrameAdapterContext) => Promise<void> | void;
  getDurationFrames: () => number;
  seekFrame: (frame: number) => Promise<void> | void;
  destroy?: () => Promise<void> | void;
};

normalizedFrame = clamp(Math.floor(frame), 0, durationFrames);

await adapter.init?.({ compositionId, fps, width, height, rootElement });
const durationFrames = adapter.getDurationFrames();

for (let frame = 0; frame <= durationFrames; frame += 1) {
  await adapter.seekFrame(frame);
  // capture pixel buffer for this frame
}

await adapter.destroy?.();