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Delphi: download BASS DLL and play MP3

I want to download bass dll manually and then play mp3 file. How to do it? Delphi XE2.

My attempt does not work:

type
  QWORD = Int64;
  HSTREAM = LongWord;
type
  TBASS_ChannelPlay = function(handle: HSTREAM; restart: LongBool): LongBool; stdcall;

type
  TBASS_StreamCreateFile = function(mem: LongBool; f: Pointer;
    offset, length: QWORD; flags: LongWord): HSTREAM; stdcall;

procedure PlayMP3(FileName: string);
var
  BASS_ChannelPlay: TBASS_ChannelPlay;
  BASS_StreamCreateFile: TBASS_StreamCreateFile;
  DllHandle: THandle;
  MP3Stream: HSTREAM;
  DllPath:string;
  pFileName:pchar;
begin
  DllPath:= 'c:\dll\bass.dll';
  DllHandle := LoadLibrary(pchar(DLLPath));
  try
    if DllHandle = 0 then
      Exit;
    @BASS_StreamCreateFile := GetProcAddress(DllHandle,
      'BASS_StreamCreateFile');
    if @BASS_StreamCreateFile <> nil then
    begin
      pfilename:=pchar(FileName);
      MP3Stream := BASS_StreamCreateFile(false, Pfilename, 0, 0, 0);
      if MP3Stream <> 0 then
      begin
        @BASS_ChannelPlay := GetProcAddress(DllHandle, 'BASS_ChannelPlay');
        if @BASS_ChannelPlay <> nil then
          BASS_ChannelPlay(MP3Stream,false);
      end;
    end;
  finally
    FreeLibrary(DllHandle);
  end;
end;

But BASS_StreamCreateFile returns 0 all the time: (

Code from their example (Bass Test) and Bass.pas:

type
  DWORD = LongWord;
  BOOL = LongBool;
  QWORD = Int64;
  HSTREAM = DWORD;

function BASS_StreamCreateFile(mem: BOOL; f: Pointer; offset, length: QWORD; flags: DWORD): HSTREAM; {$IFDEF WIN32}stdcall{$ELSE}cdecl{$ENDIF}; external bassdll;

strs: array[0..128] of HSTREAM;

procedure TForm1.Button15Click(Sender: TObject);
var
    f: PChar;
begin
    if not OpenDialog2.Execute then Exit;
    f := PChar(OpenDialog2.FileName);
    strs[strc] := BASS_StreamCreateFile(False, f, 0, 0, 0 {$IFDEF UNICODE} or BASS_UNICODE {$ENDIF});
    if strs[strc] <> 0 then
    begin
        ListBox3.Items.Add(OpenDialog2.FileName);
        Inc(strc);
    end
    else
        Error('Error creating stream!');
end;

Added

  MP3Stream := BASS_StreamCreateFile(false, Pfilename, 0, 0, 0);
  ShowMessage(SysErrorMessage(GetLastError));

GetLastError does not detect errors!

Added

There is also BASS 2.4 Delphi (dynamic).

It is written:

How to set Copy DYNAMIC_BASS.PAS to the \ LIB subdirectory of your Delphi path or your dir Call_load_BASSDLL project (e.g. in FormCreate) to load BASS before using any functions and
Unload_BASSDLL (e.g. in FormDestory) to upload it when you are done.

NOTE. Delphi 2009 users should use the BASS_UNICODE flag where possible

I do:

 if Load_BASSDLL(DllPath) then
  begin
  FileName:='C:\Users\V\Desktop\cmd.mp3';
  MP3Stream:=BASS_StreamCreateFile(False, pchar(FileName), 0, 0, 0 {$IFDEF UNICODE} or BASS_UNICODE {$ENDIF});
    if MP3Stream <> 0 then
     BASS_ChannelPlay(MP3Stream, False);
     Unload_BASSDLL;
  end;

It still doesn't work :(

Added:

BASS_Init(-1, 44100, 0, Form1.Handle, nil);

BASS_ChannelPlay(MP3Stream, False) true, : (

+5
3

BASS_Init. , , FormCreate:

// Initialize audio - default device, 44100hz, stereo, 16 bits
if not BASS_Init(-1, 44100, 0, Handle, nil) then
  Error('Error initializing audio!');

, :

BASS_StreamCreateFile(False, f, 0, 0, 
 0 {$IFDEF UNICODE} or BASS_UNICODE {$ENDIF});

, ? or BASS_UNICODE D2009 , PAnsiChar PChar; Delphi: UnicodeString, PChar - PWideChar.

{$IFDEF UNICODE} ; Delphi UNICODE, , , Delphi (pre-D2009).

dynamic_bass.pas Bass\Delphi\dynamic. ; , , , , .

+5

- .dll . "LoadDll" , Win3.0 "GetProcAddress()" .

, , Bass:

function BASS_StreamCreateFile(
           mem: BOOL; 
           f: Pointer; 
           offset, length: QWORD; 
           flags: DWORD): HSTREAM; 
{$IFDEF WIN32}stdcall{$ELSE}cdecl{$ENDIF}; external bassdll;

PS: , , LoadDll() , :

  • , Delphi XE 16- Unicode

  • GetLastError(), , WHY LoadDll .

PPS:

+2

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