161 lines
4.6 KiB
ObjectPascal
161 lines
4.6 KiB
ObjectPascal
{-----------------------------------------------------------------------------
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The contents of this file are subject to the Mozilla Public License
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Version 1.1 (the "License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/MPL-1.1.html
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
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the specific language governing rights and limitations under the License.
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The Original Code is: JvWavePlayer.PAS, released on 2001-02-28.
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The Initial Developer of the Original Code is Sébastien Buysse [sbuysse att buypin dott com]
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Portions created by Sébastien Buysse are Copyright (C) 2001 Sébastien Buysse.
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All Rights Reserved.
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Contributor(s): Michael Beck [mbeck att bigfoot dott com].
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You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
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located at http://jvcl.sourceforge.net
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Known Issues:
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-----------------------------------------------------------------------------}
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// $Id: JvWavePlayer.pas 10612 2006-05-19 19:04:09Z jfudickar $
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unit JvWavePlayer;
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{$I jvcl.inc}
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interface
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uses
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{$IFDEF UNITVERSIONING}
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JclUnitVersioning,
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{$ENDIF UNITVERSIONING}
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Windows, SysUtils, Classes, MMSystem,
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JvTypes, JvComponentBase;
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type
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TJvWavePlayer = class(TJvComponent)
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private
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FAsynchronous: Boolean;
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FLoop: Boolean;
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FFileName: TFileName;
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FWavePointer: Pointer;
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FSourceType: TJvWaveLocation;
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FBeforePlaying: TNotifyEvent;
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FAfterPlaying: TNotifyEvent;
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procedure SetAsynchronous(Value: Boolean);
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procedure SetLoop(Value: Boolean);
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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function Play: Boolean;
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procedure Stop;
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property WavePointer: Pointer read FWavePointer write FWavePointer;
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published
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property Asynchronous: Boolean read FAsynchronous write SetAsynchronous default True;
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property Loop: Boolean read FLoop write SetLoop default False;
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property SourceType: TJvWaveLocation read FSourceType write FSourceType default frFile;
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property FileName: TFileName read FFileName write FFileName;
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property BeforePlaying: TNotifyEvent read FBeforePlaying write FBeforePlaying;
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property AfterPlaying: TNotifyEvent read FAfterPlaying write FAfterPlaying;
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end;
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{$IFDEF UNITVERSIONING}
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const
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UnitVersioning: TUnitVersionInfo = (
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RCSfile: '$URL: https://jvcl.svn.sourceforge.net/svnroot/jvcl/tags/JVCL3_32/run/JvWavePlayer.pas $';
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Revision: '$Revision: 10612 $';
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Date: '$Date: 2006-05-19 21:04:09 +0200 (ven., 19 mai 2006) $';
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LogPath: 'JVCL\run'
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);
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{$ENDIF UNITVERSIONING}
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implementation
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const
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CSourceTypes: array [TJvWaveLocation] of DWORD =
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(SND_FILENAME, SND_RESOURCE, SND_MEMORY);
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constructor TJvWavePlayer.Create(AOwner: TComponent);
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begin
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inherited Create(AOwner);
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FAsynchronous := True;
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Loop := False;
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FSourceType := frFile;
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end;
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destructor TJvWavePlayer.Destroy;
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begin
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Stop;
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inherited Destroy;
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end;
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function TJvWavePlayer.Play: Boolean;
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const
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CLoops: array [Boolean] of DWORD = (0, SND_LOOP);
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CAsynchronous: array [Boolean] of DWORD = (SND_SYNC, SND_ASYNC);
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var
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Flags: DWORD;
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begin
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Result := False;
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case SourceType of
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frRAM:
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if WavePointer = nil then
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Exit;
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frFile, frResource:
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if FileName = '' then
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Exit;
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else
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Exit;
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end;
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if Assigned(FBeforePlaying) then
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FBeforePlaying(Self);
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Flags := CSourceTypes[SourceType] or CLoops[Loop] or CAsynchronous[Asynchronous];
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if FSourceType = frRAM then
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Result := PlaySound(WavePointer, 0, Flags)
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else
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Result := PlaySound(PChar(FileName), 0, Flags);
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if Assigned(FAfterPlaying) and not (Loop or Asynchronous) then
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FAfterPlaying(Self);
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end;
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procedure TJvWavePlayer.SetAsynchronous(Value: Boolean);
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begin
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FAsynchronous := Value;
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if not FAsynchronous then
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FLoop := False;
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end;
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procedure TJvWavePlayer.SetLoop(Value: Boolean);
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begin
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if (FLoop <> Value) and Asynchronous then
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FLoop := Value;
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end;
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procedure TJvWavePlayer.Stop;
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begin
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PlaySound(nil, 0, CSourceTypes[FSourceType]);
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if Assigned(FAfterPlaying) and (Loop or Asynchronous) and
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not (csDestroying in ComponentState) then
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FAfterPlaying(Self);
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end;
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{$IFDEF UNITVERSIONING}
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initialization
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RegisterUnitVersion(HInstance, UnitVersioning);
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finalization
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UnregisterUnitVersion(HInstance);
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{$ENDIF UNITVERSIONING}
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end.
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