Как прочитать MP3 ID3-Tag?

{
 Byte 1-3 = ID 'TAG'
 Byte 4-33 = Titel / Title
 Byte 34-63 = Artist
 Byte 64-93 = Album
 Byte 94-97 = Jahr / Year
 Byte 98-127 = Kommentar / Comment
 Byte 128 = Genre
}


type
 TID3Tag = record
  ID: string[3];
  Titel: string[30];
  Artist: string[30];
  Album: string[30];
  Year: string[4];
  Comment: string[30];
  Genre: Byte;
 end;
const
 Genres : array[0..146] of string =
  ('Blues','Classic Rock','Country','Dance','Disco','Funk','Grunge',
  'Hip- Hop','Jazz','Metal','New Age','Oldies','Other','Pop','R&B',
  'Rap','Reggae','Rock','Techno','Industrial','Alternative','Ska',
  'Death Metal','Pranks','Soundtrack','Euro-Techno','Ambient',
  'Trip-Hop','Vocal','Jazz+Funk','Fusion','Trance','Classical',
  'Instrumental','Acid','House','Game','Sound Clip','Gospel','Noise',
  'Alternative Rock','Bass','Punk','Space','Meditative','Instrumental Pop',
  'Instrumental Rock','Ethnic','Gothic','Darkwave','Techno-Industrial','Electronic',
  'Pop-Folk','Eurodance','Dream','Southern Rock','Comedy','Cult','Gangsta',
  ' 40','Christian Rap','Pop/Funk','Jungle','Native US','Cabaret','New Wave',
  'Psychadelic','Rave','Showtunes','Trailer','Lo-Fi','Tribal','Acid Punk',
  'Acid Jazz','Polka','Retro','Musical','Rock & Roll','Hard Rock','Folk',
  'Folk-Rock','National Folk','Swing','Fast Fusion','Bebob','Latin','Revival',
  'Celtic','Bluegrass','Avantgarde','Gothic Rock','Progressive Rock',
  'Psychedelic Rock','Symphonic Rock','Slow Rock','Big Band','Chorus',
  'Easy Listening','Acoustic','Humour','Speech','Chanson','Opera',
  'Chamber Music','Sonata','Symphony','Booty Bass','Primus','Porn Groove',
  'Satire','Slow Jam','Club','Tango','Samba','Folklore','Ballad',
  'Power Ballad','Rhytmic Soul','Freestyle','Duet','Punk Rock','Drum Solo',
  'Acapella','Euro-House','Dance Hall','Goa','Drum & Bass','Club-House',
  'Hardcore','Terror','Indie','BritPop','Negerpunk','Polsk Punk','Beat',
  'Christian Gangsta','Heavy Metal','Black Metal','Crossover','Contemporary C',
  'Christian Rock','Merengue','Salsa','Thrash Metal','Anime','JPop','SynthPop');

var
 Form1: TForm1;
implementation
{$R *.dfm}
function readID3Tag(FileName: string): TID3Tag;
var
 FS: TFileStream;
 Buffer: array [1..128] of Char;
begin
 FS := TFileStream.Create(FileName, fmOpenRead or fmShareDenyWrite);
 try
  FS.Seek(-128, soFromEnd);
  FS.Read(Buffer, 128);
  with Result do
  begin
  ID := Copy(Buffer, 1, 3);
  Titel := Copy(Buffer, 4, 30);
  Artist := Copy(Buffer, 34, 30);
  Album := Copy(Buffer, 64, 30);
  Year := Copy(Buffer, 94, 4);
  Comment := Copy(Buffer, 98, 30);
  Genre := Ord(Buffer[128]);
  end;
 finally
  FS.Free;
 end;
end;
procedure TfrmMain.Button1Click(Sender: TObject);
begin
 if OpenDialog1.Execute then
 begin
  with readID3Tag(OpenDialog1.FileName) do
  begin
  LlbID.Caption := 'ID: ' + ID;
  LlbTitel.Caption := 'Titel: ' + Titel;
  LlbArtist.Caption := 'Artist: ' + Artist;
  LlbAlbum.Caption := 'Album: ' + Album;
  LlbYear.Caption := 'Year: ' + Year;
  LlbComment.Caption := 'Comment: ' + Comment;
  if (Genre >= 0) and (Genre <=146) then
  LlbGenre.Caption := 'Genre: ' + Genres[Genre]
  else
  LlbGenre.Caption := 'N/A';
  end;
 end;
end;

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