Валентин Озеров - Советы по Delphi. Версия 1.4.3 от 1.1.2001

В итоге получаем летящий вертолет слева направо. Заодно можете проверить, правильно ли у вас расположены колонки.

PS. Если есть вопросы, постараюсь на них ответить.

unitUnit1;

interface

usesWindows, Messages, SysUtils, Classes, Graphics, Controls,Forms, Dialogs, DSound, MMSystem, StdCtrls, ExtCtrls;

typeTForm1 = class(TForm)

Button1: TButton;

Timer1: TTimer;

procedureFormCreate(Sender: TObject);

procedureFormDestroy(Sender: TObject);

procedureButton1Click(Sender: TObject);

procedureTimer1Timer(Sender: TObject);

private

DirectSound: IDirectSound;

DirectSoundBuffer: IDirectSoundBuffer;

SecondarySoundBuffer: IDirectSoundBuffer;

SecondarySound3DBuffer: IDirectSound3DBuffer;

procedureAppCreateWritePrimaryBuffer;

procedureAppCreateWriteSecondary3DBuffer( varBuffer: IDirectSoundBuffer; SamplesPerSec: Integer; Bits: Word; isStereo: Boolean; Time: Integer);

procedureAppSetSecondary3DBuffer( varBuffer: IDirectSoundBuffer; var_3DBuffer: IDirectSound3DBuffer);

procedureAppWriteDataToBuffer(Buffer: IDirectSoundBuffer; OffSet: DWord; varSoundData; SoundBytes: DWord);

procedureCopyWAVToBuffer(Name: PChar; varBuffer: IDirectSoundBuffer);

{ Private declarations }

public

{ Public declarations }

end;

varForm1: TForm1;

implementation

{$R *.DFM}

procedureTForm1.FormCreate(Sender: TObject);

varResult : HResult;

begin

ifDirectSoundCreate( nil, DirectSound, nil) <> DS_OK then RaiseException.Create('Failed to create IDirectSound object');

AppCreateWritePrimaryBuffer;

AppCreateWriteSecondary3DBuffer(SecondarySoundBuffer, 22050, 8, False, 4);

AppSetSecondary3DBuffer(SecondarySoundBuffer, SecondarySound3DBuffer);Timer1.Enabled:=False;

end;

procedureTForm1.FormDestroy(Sender: TObject);

vari: ShortInt;

begin

ifAssigned(DirectSoundBuffer) thenDirectSoundBuffer.Release;

ifAssigned(SecondarySound3DBuffer) thenSecondarySound3DBuffer.Release;

ifAssigned(SecondarySoundBuffer) thenSecondarySoundBuffer.Release;

ifAssigned(DirectSound) thenDirectSound.Release;

end;

procedureTForm1.AppCreateWritePrimaryBuffer;

var

BufferDesc : DSBUFFERDESC;

Caps : DSBCaps;

PCM : TWaveFormatEx;

begin

FillChar(BufferDesc, SizeOf(DSBUFFERDESC),0);

FillChar(PCM, SizeOf(TWaveFormatEx), 0);

withBufferDesc do begin

PCM.wFormatTag:=WAVE_FORMAT_PCM;

PCM.nChannels:=2;

PCM.nSamplesPerSec:=22050;

PCM.nBlockAlign:=4;

PCM.nAvgBytesPerSec:=PCM.nSamplesPerSec * PCM.nBlockAlign;

PCM.wBitsPerSample:=16;

PCM.cbSize:=0;

dwSize:=SizeOf(DSBUFFERDESC);

dwFlags:=DSBCAPS_PRIMARYBUFFER;

dwBufferBytes:=0;

lpwfxFormat:= nil;

end;

ifDirectSound.SetCooperativeLevel(Handle, DSSCL_WRITEPRIMARY) <> DS_OK then RaiseException.Create('Unable to set Cooperative Level');

ifDirectSound.CreateSoundBuffer(BufferDesc, DirectSoundBuffer, nil) <> DS_OK then RaiseException.Create('Create Sound Buffer failed');

ifDirectSoundBuffer.SetFormat(PCM) <> DS_OK then RaiseException.Create('Unable to Set Format ');

ifDirectSound.SetCooperativeLevel(Handle, DSSCL_NORMAL) <> DS_OK then RaiseException.Create('Unable to set Cooperative Level');

end;

procedureTForm1.AppCreateWriteSecondary3DBuffer;

var

BufferDesc : DSBUFFERDESC;

Caps : DSBCaps;

PCM : TWaveFormatEx;

begin

FillChar(BufferDesc, SizeOf(DSBUFFERDESC), 0);

FillChar(PCM, SizeOf(TWaveFormatEx), 0);

withBufferDesc do begin

PCM.wFormatTag:=WAVE_FORMAT_PCM;

ifisStereo then PCM.nChannels:=2

elsePCM.nChannels:=1;

PCM.nSamplesPerSec:=SamplesPerSec;

PCM.nBlockAlign:=(Bits div8)*PCM.nChannels;

PCM.nAvgBytesPerSec:=PCM.nSamplesPerSec * PCM.nBlockAlign;

PCM.wBitsPerSample:=Bits;

PCM.cbSize:=0;

dwSize:=SizeOf(DSBUFFERDESC);

dwFlags:=DSBCAPS_STATIC orDSBCAPS_CTRL3D;

dwBufferBytes:=Time*PCM.nAvgBytesPerSec;

lpwfxFormat:=@PCM;

end;

ifDirectSound.CreateSoundBuffer(BufferDesc, Buffer, nil) <> DS_OK then RaiseException.Create('Create Sound Buffer failed');

end;

procedureTForm1.AppWriteDataToBuffer;

var

AudioPtr1, AudioPtr2: Pointer;

AudioBytes1, AudioBytes2: DWord;

h: HResult;

Temp: Pointer;

begin

H:=Buffer.Lock(OffSet, SoundBytes, AudioPtr1, AudioBytes1, AudioPtr2, AudioBytes2, 0);

ifH = DSERR_BUFFERLOST then begin

Buffer.Restore;

ifBuffer.Lock(OffSet, SoundBytes, AudioPtr1, AudioBytes1, AudioPtr2, AudioBytes2, 0) <> DS_OK then RaiseException.Create('Unable to Lock Sound Buffer');

end

else ifH <> DS_OK then RaiseException.Create('Unable to Lock Sound Buffer');

Temp:=@SoundData;

Move(Temp^, AudioPtr1^, AudioBytes1);