code: function parseOrientationTag({buffer, exifData}) {
    let orientation = null
    if (exifData['0th'] && exifData['0th'][piexif.ImageIFD.Orientation]) {
      orientation = parseInt(exifData['0th'][piexif.ImageIFD.Orientation])
    }
    if (orientation === null) {
      throw new CustomError(m.errors.no_orientation, 'No orientation tag found in EXIF', buffer)
    }
    if (isNaN(orientation) || orientation < 1 || orientation > 8) {
      throw new CustomError(m.errors.unknown_orientation, 'Unknown orientation (' + orientation + ')', buffer)
    }
    if (orientation === 1) {
      throw new CustomError(m.errors.correct_orientation, 'Orientation already correct', buffer)
    }
    return orientation
  }
docs: Extract the orientation tag from the given EXIF data