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-rw-r--r--src/classes/UAudioPlaybackBase.pas292
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diff --git a/src/classes/UAudioPlaybackBase.pas b/src/classes/UAudioPlaybackBase.pas
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-unit UAudioPlaybackBase;
-
-interface
-
-{$IFDEF FPC}
- {$MODE Delphi}
-{$ENDIF}
-
-{$I switches.inc}
-
-uses
- UMusic;
-
-type
- TAudioPlaybackBase = class(TInterfacedObject, IAudioPlayback)
- protected
- OutputDeviceList: TAudioOutputDeviceList;
- MusicStream: TAudioPlaybackStream;
- function CreatePlaybackStream(): TAudioPlaybackStream; virtual; abstract;
- procedure ClearOutputDeviceList();
- function GetLatency(): double; virtual; abstract;
-
- // open sound or music stream (used by Open() and OpenSound())
- function OpenStream(const Filename: string): TAudioPlaybackStream;
- function OpenDecodeStream(const Filename: string): TAudioDecodeStream;
- public
- function GetName: string; virtual; abstract;
-
- function Open(const Filename: string): boolean; // true if succeed
- procedure Close;
-
- procedure Play;
- procedure Pause;
- procedure Stop;
- procedure FadeIn(Time: real; TargetVolume: single);
-
- procedure SetSyncSource(SyncSource: TSyncSource);
-
- procedure SetPosition(Time: real);
- function GetPosition: real;
-
- function InitializePlayback: boolean; virtual; abstract;
- function FinalizePlayback: boolean; virtual;
-
- //function SetOutputDevice(Device: TAudioOutputDevice): boolean;
- function GetOutputDeviceList(): TAudioOutputDeviceList;
-
- procedure SetAppVolume(Volume: single); virtual; abstract;
- procedure SetVolume(Volume: single);
- procedure SetLoop(Enabled: boolean);
-
- procedure Rewind;
- function Finished: boolean;
- function Length: real;
-
- // Sounds
- function OpenSound(const Filename: string): TAudioPlaybackStream;
- procedure PlaySound(Stream: TAudioPlaybackStream);
- procedure StopSound(Stream: TAudioPlaybackStream);
-
- // Equalizer
- procedure GetFFTData(var Data: TFFTData);
-
- // Interface for Visualizer
- function GetPCMData(var Data: TPCMData): Cardinal;
-
- function CreateVoiceStream(Channel: integer; FormatInfo: TAudioFormatInfo): TAudioVoiceStream; virtual; abstract;
- end;
-
-
-implementation
-
-uses
- ULog,
- SysUtils;
-
-{ TAudioPlaybackBase }
-
-function TAudioPlaybackBase.FinalizePlayback: boolean;
-begin
- FreeAndNil(MusicStream);
- ClearOutputDeviceList();
- Result := true;
-end;
-
-function TAudioPlaybackBase.Open(const Filename: string): boolean;
-begin
- // free old MusicStream
- MusicStream.Free;
-
- MusicStream := OpenStream(Filename);
- if not assigned(MusicStream) then
- begin
- Result := false;
- Exit;
- end;
-
- //MusicStream.AddSoundEffect(TVoiceRemoval.Create());
-
- Result := true;
-end;
-
-procedure TAudioPlaybackBase.Close;
-begin
- FreeAndNil(MusicStream);
-end;
-
-function TAudioPlaybackBase.OpenDecodeStream(const Filename: String): TAudioDecodeStream;
-var
- i: integer;
-begin
- for i := 0 to AudioDecoders.Count-1 do
- begin
- Result := IAudioDecoder(AudioDecoders[i]).Open(Filename);
- if (assigned(Result)) then
- begin
- Log.LogInfo('Using decoder ' + IAudioDecoder(AudioDecoders[i]).GetName() +
- ' for "' + Filename + '"', 'TAudioPlaybackBase.OpenDecodeStream');
- Exit;
- end;
- end;
- Result := nil;
-end;
-
-procedure OnClosePlaybackStream(Stream: TAudioProcessingStream);
-var
- PlaybackStream: TAudioPlaybackStream;
- SourceStream: TAudioSourceStream;
-begin
- PlaybackStream := TAudioPlaybackStream(Stream);
- SourceStream := PlaybackStream.GetSourceStream();
- SourceStream.Free;
-end;
-
-function TAudioPlaybackBase.OpenStream(const Filename: string): TAudioPlaybackStream;
-var
- PlaybackStream: TAudioPlaybackStream;
- DecodeStream: TAudioDecodeStream;
-begin
- Result := nil;
-
- //Log.LogStatus('Loading Sound: "' + Filename + '"', 'TAudioPlayback_Bass.OpenStream');
-
- DecodeStream := OpenDecodeStream(Filename);
- if (not assigned(DecodeStream)) then
- begin
- Log.LogStatus('Could not open "' + Filename + '"', 'TAudioPlayback_Bass.OpenStream');
- Exit;
- end;
-
- // create a matching playback-stream for the decoder
- PlaybackStream := CreatePlaybackStream();
- if (not PlaybackStream.Open(DecodeStream)) then
- begin
- FreeAndNil(PlaybackStream);
- FreeAndNil(DecodeStream);
- Exit;
- end;
-
- PlaybackStream.AddOnCloseHandler(OnClosePlaybackStream);
-
- Result := PlaybackStream;
-end;
-
-procedure TAudioPlaybackBase.Play;
-begin
- if assigned(MusicStream) then
- MusicStream.Play();
-end;
-
-procedure TAudioPlaybackBase.Pause;
-begin
- if assigned(MusicStream) then
- MusicStream.Pause();
-end;
-
-procedure TAudioPlaybackBase.Stop;
-begin
- if assigned(MusicStream) then
- MusicStream.Stop();
-end;
-
-function TAudioPlaybackBase.Length: real;
-begin
- if assigned(MusicStream) then
- Result := MusicStream.Length
- else
- Result := 0;
-end;
-
-function TAudioPlaybackBase.GetPosition: real;
-begin
- if assigned(MusicStream) then
- Result := MusicStream.Position
- else
- Result := 0;
-end;
-
-procedure TAudioPlaybackBase.SetPosition(Time: real);
-begin
- if assigned(MusicStream) then
- MusicStream.Position := Time;
-end;
-
-procedure TAudioPlaybackBase.SetSyncSource(SyncSource: TSyncSource);
-begin
- if assigned(MusicStream) then
- MusicStream.SetSyncSource(SyncSource);
-end;
-
-procedure TAudioPlaybackBase.Rewind;
-begin
- SetPosition(0);
-end;
-
-function TAudioPlaybackBase.Finished: boolean;
-begin
- if assigned(MusicStream) then
- Result := (MusicStream.Status = ssStopped)
- else
- Result := true;
-end;
-
-procedure TAudioPlaybackBase.SetVolume(Volume: single);
-begin
- if assigned(MusicStream) then
- MusicStream.Volume := Volume;
-end;
-
-procedure TAudioPlaybackBase.FadeIn(Time: real; TargetVolume: single);
-begin
- if assigned(MusicStream) then
- MusicStream.FadeIn(Time, TargetVolume);
-end;
-
-procedure TAudioPlaybackBase.SetLoop(Enabled: boolean);
-begin
- if assigned(MusicStream) then
- MusicStream.Loop := Enabled;
-end;
-
-// Equalizer
-procedure TAudioPlaybackBase.GetFFTData(var data: TFFTData);
-begin
- if assigned(MusicStream) then
- MusicStream.GetFFTData(data);
-end;
-
-{*
- * Copies interleaved PCM SInt16 stereo samples into data.
- * Returns the number of frames
- *}
-function TAudioPlaybackBase.GetPCMData(var data: TPCMData): Cardinal;
-begin
- if assigned(MusicStream) then
- Result := MusicStream.GetPCMData(data)
- else
- Result := 0;
-end;
-
-function TAudioPlaybackBase.OpenSound(const Filename: string): TAudioPlaybackStream;
-begin
- Result := OpenStream(Filename);
-end;
-
-procedure TAudioPlaybackBase.PlaySound(stream: TAudioPlaybackStream);
-begin
- if assigned(stream) then
- stream.Play();
-end;
-
-procedure TAudioPlaybackBase.StopSound(stream: TAudioPlaybackStream);
-begin
- if assigned(stream) then
- stream.Stop();
-end;
-
-procedure TAudioPlaybackBase.ClearOutputDeviceList();
-var
- DeviceIndex: integer;
-begin
- for DeviceIndex := 0 to High(OutputDeviceList) do
- OutputDeviceList[DeviceIndex].Free();
- SetLength(OutputDeviceList, 0);
-end;
-
-function TAudioPlaybackBase.GetOutputDeviceList(): TAudioOutputDeviceList;
-begin
- Result := OutputDeviceList;
-end;
-
-end.