CDDB
About
CDDB is a simple unit for accessing CD track information from CDDB/FreeDB. There is little documentation but sample code is provided below.
License
Download
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Dependencies / System Requirements
- Linux
- Synapse httpsend unit
Installation
Copy the unit into the source directory for your project.
Use
The first step to accessing CDDB is creating TCDDB. This is where the connection and application information is defined. TCDDB has some default values so you don't have to define them all. The default server is FreeDB.
<delphi>procedure CreateCDDB; var
CDDB: TCDDB;
begin
CDDB := TCDDB.Create; CDDB.ServerURL := 'http://freedb.freedb.org/~cddb/cddb.cgi'; // this is the server to access CDDB.ClientName := 'fpccddb'; // your application name that is passed to the server
end;</delphi>
First try using the MOTD (Message of the Day) command. <delphi>procedure TForm1.btnMOTDClick(Sender: TObject); var
CDDB: TCDDB; cmd: TCDDBMOTD;
begin
CDDB := TCDDB.Create; cmd := TCDDBMOTD.Create(CDDB); try cmd.Execute; Memo1.Lines.Assign(cmd.MOTDResponse.Response); finally cmd.Free; CDDB.Free; end;
end;</delphi>
You can get a list of supported categories using TCDDBListCategories <delphi>procedure TForm1.btnCategoriesClick(Sender: TObject); var
CDDB: TCDDB; cmd: TCDDBListCategories;
begin
CDDB := TCDDB.Create; cmd := TCDDBListCategories.Create(CDDB); try cmd.Execute; lbxCategories.Items.Assign(cmd.ListCategoriesResponse.Categories); finally cmd.Free; CDDB.Free; end;
end;</delphi>
This last example will query the database using the cdrom '/dev/cdrom'. The result is loaded into a TStringGrid named grdQueryResponse. <delphi>procedure TForm1.btnQueryClick(Sender: TObject); var
CDDB: TCDDB; Cmd: TCDDBQuery; i: Integer;
begin
CDDB := TCDDB.Create; Cmd := TCDDBQuery.Create(CDDB); try Cmd.Device := '/dev/cdrom' try Cmd.Execute; except on E:Exception do begin ShowMessage(E.Message); Exit; end; end; with Cmd.QueryResponse do begin for i := 0 to ResponseCount-1 do begin grdQueryResponse.RowCount := grdQueryResponse.RowCount+1; grdQueryResponse.Cells[0,i+1] := Artist[i]; grdQueryResponse.Cells[1,i+1] := Album[i]; grdQueryResponse.Cells[2,i+1] := Category[i]; grdQueryResponse.Cells[3,i+1] := DiscID[i]; end; end; finally cmd.Free; CDDB.Free end;
end;</delphi>