Function analyzeCompositionHdr

packages/engine/src/utils/hdr.ts:120–137

(
  colorSpaces: Array<VideoColorSpace | null>,
)

 * contains HDR content and what the dominant transfer function is.
 */
export function analyzeCompositionHdr(
  colorSpaces: Array<VideoColorSpace | null>,
): CompositionHdrInfo {
  let hasPq = false;
  let hasHdr = false;

  for (const cs of colorSpaces) {
    if (!isHdrColorSpace(cs)) continue;
    hasHdr = true;
    if (cs?.colorTransfer === "smpte2084") hasPq = true;
  }

  if (!hasHdr) return { hasHdr: false, dominantTransfer: null };

  // PQ takes priority — it's the more common HDR10 format
  const dominantTransfer: HdrTransfer = hasPq ? "pq" : "hlg";
  return { hasHdr: true, dominantTransfer };
}