function SetWaveVolume...

[spacewolf]

Moin,

kann mir einer sagen warum die folgende Funktion:

Delphi-Quellcode:

function SetWaveVolume(const AVolume: DWORD): Boolean;
var
  WaveOutCaps: TWAVEOUTCAPS;
begin
  Result := False;
  if WaveOutGetDevCaps(WAVE_MAPPER, @WaveOutCaps, SizeOf(WaveOutCaps)) = MMSYSERR_NOERROR then
    if WaveOutCaps.dwSupport and WAVECAPS_VOLUME = WAVECAPS_VOLUME then
      Result := WaveOutSetVolume(WAVE_MAPPER, AVolume) = MMSYSERR_NOERROR;
end;

nur eine Seite des Lautsprechers setzt die andere aber auf 0 - das heißt das WAVEOUT gibt dann nur noch mono wieder...



der
Andreas

[spacewolf]

wees wirklich keener?

[DeddyH]

Zitat von MSDN:

The low-order word contains the left-channel volume setting, and the high-order word contains the right-channel setting.
...
If a device does not support both left and right volume control, the low-order word of dwVolume specifies the volume level, and the high-order word is ignored.

Wie sieht AVolume denn aus, heißt welche Zahl übergibst Du?

[lbccaleb]

Schaue dir mal diesen Code dazu an

Volume Left/Right

[turboPASCAL]

Siehe dazu:
http://www.delphipraxis.net/internal...=686662#686662

http://www.swissdelphicenter.ch/de/showcode.php?id=630 schreibt:

Delphi-Quellcode:

{
  AVolume:
  The low-order word contains the left-channel volume setting,
  and the high-order word contains the right-channel setting.
  A value of 65535 represents full volume, and a value of 0000 is silence.
  If a device does not support both left and right volume control,
  the low-order word of dwVolume specifies the volume level,
  and the high-order word is ignored.
}


{ *** How to Use: ***}

// SetWaveVolume:

procedure TForm1.Button1Click(Sender: TObject);
var
  LVol: Word;
  RVol: Word;
begin
  LVol := SpinEdit1.Value;  // max. is 65535
  RVol := SpinEdit2.Value;  // max. is 65535
  SetWaveVolume(MakeLong(LVol, RVol));
end;