Dauer und Position von MP3s mittels bass.dll

[Matze]

Hi zusammen!

Wie kann ich mittels der bass.dll die Dauer einer MP3 ermitteln und wie kann ich die Position des Songs verändern?

Damit meine ich, so mit einer Trackbar, wie beim WMP, die auch gleichzeitig den aktuellen Fortschritt anzeigt.

[Luckie]

Delphi-Quellcode:

{-----------------------------------------------------------------------------
  Procedure : BASSSetTrackPos - Author : Michael Puff
  Date      : 2003-07-07
  Purpose   : Have a guess. ;o)
-----------------------------------------------------------------------------}
procedure BASSSetTrackPos(handle: Cardinal; idx: int64);
begin
  if BASS_ACTIVE_PLAYING = BASS_ChannelIsActive(handle) then
    BASS_ChannelPause(handle);
  if not BASS_ChannelSetPosition(handle, idx) then
  begin
    BASS_Error(BASS_ERRORGetCode,
      'Position im Titel konnte nicht geändert werden.');
    exit;
  end;
  BASS_ChannelResume(handle);
end;

Aus meinem Player mit der bass.dll.

Und hier noch einer:
TrackPos := BASS_ChannelGetPosition(hFileStream); Steht aber alles in der Hilfe drin.

[Matze]

Vielen Dank!

Dein Player Da hätt ich eigentlich drauf kommen müssen, sorry.

*gleich mal deinen Traffic erhöhe*
*Bannerklick*

[Gandalfus]

Nochmal meine unit:

Delphi-Quellcode:

unit U_BassPlayer;

interface

uses
  bass, Windows, dialogs, Classes, StdCtrls, SysUtils;


type
  WAVHDR = packed record
    riff:  array[0..3] of Char;
    len: DWord;
    cWavFmt: array[0..7] of Char;
    dwHdrLen: DWord;
    wFormat: Word;
    wNumChannels: Word;
    dwSampleRate: DWord;
    dwBytesPerSec: DWord;
    wBlockAlign: Word;
    wBitsPerSample: Word;
    cData: array[0..3] of Char;
    dwDataLen: DWord;
  end;

  TFFTData = array[0..256] of Single;

  TBassPlayer = class
  private
    { Private declarations }
    channel: HSTREAM;

    WaveHdr: WAVHDR;  // WAV header
    recordchannel:   HRECORD;   // recording channel
    isrecording: boolean;

    FFilename: string;
    procedure setvolume(volume: byte); {0 bis 100}
    function getvolume: byte;
    function getposition: integer;
    function getlength: integer;         {in sekunden}
    function getRightPeak: dword;
    function getLeftPeak: dword;
    function getstatus: integer;

  public
    constructor create(mainwindowhandle: HWND);
    destructor destroy; override;
    function play(filename: string): boolean;
    function getfftdata: TFFTData;
    procedure stop;
    procedure pause;
    procedure resume;

    procedure startrecording(input: integer;filename: string);
    procedure stoprecording;
    function getDatasize: int64;
    procedure setrecordvolume(input: integer;volume: integer);

    procedure initCombobox(Combobox: TCombobox);
    procedure ComboBoxChange(Sender: TObject);

    property volume: byte read getvolume write setvolume;
    procedure setposition(position: integer);
    property position: integer read getposition write setposition;{in sekunden}
    property length: integer read getlength;
    property RightPeak: dword read getRightPeak;   {von 0 bis 128}
    property LeftPeak: dword read getLeftPeak;     {von 0 bis 128}
    property filename: string read FFilename;
    property status: integer read getstatus; //STOPPED = 0   PLAYING = 1   STALLED = 2   PAUSED  = 3
    { Public declarations }
  end;

implementation

var
  WaveStream: TFileStream;//muss leider global deklariert werden wegen callback Funktion

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.getstatus: integer;
begin //STOPPED = 0   PLAYING = 1   STALLED = 2   PAUSED  = 3
  result := BASS_ChannelIsActive(channel);
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_GetConfig(BASS_CONFIG_GVOL_STREAM);
end;

procedure TBassPlayer.setvolume(volume: byte);
begin
  BASS_SetConfig(BASS_CONFIG_GVOL_STREAM,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;
  FFilename := filename;

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

procedure TBassPlayer.stop;
begin
  BASS_ChannelPause(channel);
  position := 0;
end;

procedure TBassPlayer.pause;
begin
  BASS_ChannelPause(channel);
end;

procedure TBassPlayer.resume;
begin
  BASS_ChannelResume(channel);
end;

constructor TBassPlayer.create(mainwindowhandle: HWND);
begin
  inherited create;;
  if BASS_GetVersion() <> MAKELONG(2,0) then
  begin
    showmessage('Falsche Version der bass.dll(benötigt wird 2.0)');
    Halt;
  end;
  BASS_Init(1, 44100, 0, mainwindowhandle,nil);

  if not BASS_RecordInit(0) then
  begin
    BASS_RecordFree;
    BASS_Free();
    MessageDlg('Cannot start default recording device!', mtError, [mbOk], 0);
    halt;
  end;

  isrecording := false;
end;


destructor TBassPlayer.destroy;
begin
  BASS_RecordFree;

  Bass_streamFree(channel);
  BASS_Stop;
  BASS_Free;
  inherited destroy;
end;

// This is called while recording audio
function RecordingCallback(Handle: HRECORD; buffer: Pointer; length, user: DWord): boolean; stdcall;
begin
  // Copy new buffer contents to the memory buffer
  WaveStream.Write(buffer^, length);
  //Allow recording to continue
  Result := True;
end;


procedure TBassPlayer.startrecording(input: integer;filename: string);
var
  i: Integer;
begin
  //File Stream
  WaveStream := TFileStream.Create(filename,fmCreate);


  if WaveStream.Size > 0 then
  begin   // free old recording
    BASS_StreamFree(channel);
  end;

  // generate header for WAV file
  WaveHdr.riff := 'RIFF';
  WaveHdr.len := 36;
  WaveHdr.cWavFmt := 'WAVEfmt ';
  WaveHdr.dwHdrLen := 16;
  WaveHdr.wFormat := 1;
  WaveHdr.wNumChannels := 2;
  WaveHdr.dwSampleRate := 44100;
  WaveHdr.wBlockAlign := 4;
  WaveHdr.dwBytesPerSec := 176400;
  WaveHdr.wBitsPerSample := 16;
  WaveHdr.cData := 'data';
  WaveHdr.dwDataLen := 0;

  WaveStream.Write(WaveHdr, SizeOf(WAVHDR));
  i := 0;
  while BASS_RecordSetInput(i, BASS_INPUT_OFF) do
  begin
    i := i + 1;
  end;
  BASS_RecordSetInput(input, BASS_INPUT_ON);

  // start recording @ 44100hz 16-bit stereo
  recordchannel := BASS_RecordStart(44100, 0, @RecordingCallback, 0);
  if recordchannel = 0 then
  begin
    MessageDlg('Couldn''t start recording!', mtError, [mbOk], 0);
    WaveStream.Free;
  end;

  isrecording:= true;
end;

procedure TBassPlayer.stoprecording;
var
  i: integer;
begin
  BASS_ChannelStop(recordchannel);

  // complete the WAV header
  WaveStream.Position := 4;
  i := WaveStream.Size - 8;
  WaveStream.Write(i, 4);
  i := i - $24;
  WaveStream.Position := 40;
  WaveStream.Write(i, 4);
  WaveStream.Position := 0;
  // create a stream from the recorded data
  //channel := BASS_StreamCreateFile(false, pchar(FRecordfilename), 0, WaveStream.Size, 0);

  {if channel = 0 then
  begin
    MessageDlg('Error creating stream from recorded data!', mtError, [mbOk], 0);
  end;}
  WaveStream.Free;
end;

function TBassPlayer.getDatasize: int64;
begin
  IF isrecording then
  begin
    result:= WaveStream.Size
  end
  else
  begin
    result:=0;
  end;
end;

procedure TBassPlayer.setrecordvolume(input: integer;volume: integer);
begin
  BASS_RecordSetInput(input, BASS_INPUT_LEVEL or volume);
end;

end.

[Matze]

Cool, vielen Dank!

Ich glaube, die habe ich jetzt sogar verwendet, die hast du hier irgendwo schonmal gepostet und in einem anderen Delphi-Frum auch. #

Hab sie über die Suche dann gefunden, trotzdem vienen Dank!