public static function WMpictureTypeLookup($WMpictureType) {
    static $lookup = null;
    if ($lookup === null) {
      $lookup = array(
        0x03 => 'Front Cover',
        0x04 => 'Back Cover',
        0x00 => 'User Defined',
        0x05 => 'Leaflet Page',
        0x06 => 'Media Label',
        0x07 => 'Lead Artist',
        0x08 => 'Artist',
        0x09 => 'Conductor',
        0x0A => 'Band',
        0x0B => 'Composer',
        0x0C => 'Lyricist',
        0x0D => 'Recording Location',
        0x0E => 'During Recording',
        0x0F => 'During Performance',
        0x10 => 'Video Screen Capture',
        0x12 => 'Illustration',
        0x13 => 'Band Logotype',
        0x14 => 'Publisher Logotype'
      );
      $lookup = array_map(function($str) {
        return getid3_lib::iconv_fallback('UTF-8', 'UTF-16LE', $str);
      }, $lookup);
    }

    return (isset($lookup[$WMpictureType]) ? $lookup[$WMpictureType] : '');
  }