Function getSplatFileType

src/SplatLoader.ts:403–434

(
  fileBytes: Uint8Array,
)

}

export function getSplatFileType(
  fileBytes: Uint8Array,
): SplatFileType | undefined {
  const view = new DataView(fileBytes.buffer);
  const magic = view.getUint32(0, true);
  if ((magic & 0x00ffffff) === 0x00796c70) {
    return SplatFileType.PLY;
  }
  if ((magic & 0x00ffffff) === 0x00088b1f) {
    // Gzipped file, unpack beginning to check magic number
    const header = decompressPartialGzip(fileBytes, 4);
    const gView = new DataView(header.buffer);
    if (gView.getUint32(0, true) === 0x5053474e) {
      return SplatFileType.SPZ;
    }
    // Unknown Gzipped file type
    return undefined;
  }
  if (magic === 0x04034b50) {
    // PKZip file
    if (tryPcSogsZip(fileBytes)) {
      return SplatFileType.PCSOGSZIP;
    }
    // Unknown PKZip file type
    return undefined;
  }
  if (magic === 0x30444152) {
    return SplatFileType.RAD;
  }
  // Unknown file type
  return undefined;
}

// Returns the lowercased file extension from a path or URL
export function getFileExtension(pathOrUrl: string): string {