bass.dll

[Gandalfus]

hier mal meine alte bass unit:

Delphi-Quellcode:

unit U_BassPlayer;

interface

uses bass, Windows;
  

type
  TFFTData = array[0..256] of float;

  TBassPlayer = class
  private
    { Private declarations }
    channel: HCHANNEL;
    status: byte;


  public
    function play(filename: string): boolean;
    procedure initbassPlayer(mainwindowhandle: HWND);
    procedure freebassPlayer;
    procedure setvolume(volume: byte); {0 bis 100}
    function getvolume: byte;
    property volume: byte read getvolume write setvolume ;
    procedure setposition(position: integer);
    function getposition: integer;         {in sekunden}
    property position: integer read getposition write setposition;
    function getlength: integer;
    property length: integer read getlength;
    function getRightPeak: dword;
    property RightPeak: dword read getRightPeak;   {von 0 bis 128}
    function getLeftPeak: dword;
    property LeftPeak: dword read getLeftPeak;     {von 0 bis 128}
    function getfftdata: TFFTData;

    { Public declarations }
  end;

implementation

function TBassPlayer.getfftdata: TFFTData;
begin
  if (BASS_ChannelGetData(Channel, @Result, BASS_DATA_FFT512) = 2048) = false then
  begin
    ZeroMemory(@Result, SizeOf(Result));
  end;
end;


function TBassPlayer.getRightPeak: dword;
begin
  result := HIWORD(BASS_ChannelGetLevel(channel));

end;

function TBassPlayer.getLeftPeak: dword;
begin
  result := LOWORD(BASS_ChannelGetLevel(channel));
end;


function TBassPlayer.getvolume: byte;
begin
  result := BASS_GetVolume;
end;

procedure TBassPlayer.setvolume(volume: byte);
begin
  //BASS_SetVolume(volume);
  BASS_SetGlobalVolumes(-1,-1,volume);
end;


function TBassPlayer.getposition: integer;
begin
   result := round(BASS_ChannelBytes2Seconds(channel,BASS_ChannelGetPosition(channel)));
end;

procedure TBassPlayer.setposition(position: integer);
begin
  BASS_ChannelSetPosition(Channel,BASS_ChannelSeconds2Bytes(Channel, position));
end;

function TBassPlayer.getlength: integer;
begin
  result := round(BASS_ChannelBytes2Seconds(channel,BASS_StreamGetLength(channel)));
end;


function TBassPlayer.play(filename: string): boolean;
begin
  If BASS_ChannelIsActive(channel)=1 then
  begin
    BASS_StreamFree(channel);
  end;

  channel:=BASS_StreamCreateFile(False,PChar(filename),0,0,BASS_STREAM_AUTOFREE or BASS_SAMPLE_FX);
  BASS_StreamPlay(channel,false,0);
end;

{es würde sich hier noch anbieten den Constructor zu überschreiben}
{das müsstest du aber selber noch verändern.}
procedure TBassPlayer.initbassPlayer(mainwindowhandle: HWND);
begin
  if BASS_GetVersion() <> MAKELONG(1,8) then Halt;
  BASS_Init(-1, 44100, BASS_DEVICE_LEAVEVOL, mainwindowhandle);
  BASS_Start;
end;

procedure TBassPlayer.freebassPlayer;
begin
  Bass_streamFree(channel);
  BASS_Stop;
  BASS_Free;
end;

end.

Anwendung:
Neue unit erstellen(und das von oben reinkopieren) diese in main unit einbinden und

var Bassplayer: TBassPlayer

....
create:

Delphi-Quellcode:

Bassplayer := TBassPlayer.create;
Bassplayer.initbassPlayer(Form1.handle);

play:
Bassplayer.play('c:\blablub.mp3') destroy:

Delphi-Quellcode:

Bassplayer.freebassPlayer;
Bassplayer.free;