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-rw-r--r--src/classes/UAudioPlayback_Portaudio.pas361
1 files changed, 0 insertions, 361 deletions
diff --git a/src/classes/UAudioPlayback_Portaudio.pas b/src/classes/UAudioPlayback_Portaudio.pas
deleted file mode 100644
index c3717ba6..00000000
--- a/src/classes/UAudioPlayback_Portaudio.pas
+++ /dev/null
@@ -1,361 +0,0 @@
-unit UAudioPlayback_Portaudio;
-
-interface
-
-{$IFDEF FPC}
- {$MODE Delphi}
-{$ENDIF}
-
-{$I switches.inc}
-
-
-uses
- Classes,
- SysUtils,
- UMusic;
-
-implementation
-
-uses
- portaudio,
- UAudioCore_Portaudio,
- UAudioPlayback_SoftMixer,
- ULog,
- UIni,
- UMain;
-
-type
- TAudioPlayback_Portaudio = class(TAudioPlayback_SoftMixer)
- private
- paStream: PPaStream;
- AudioCore: TAudioCore_Portaudio;
- Latency: double;
- function OpenDevice(deviceIndex: TPaDeviceIndex): boolean;
- function EnumDevices(): boolean;
- protected
- function InitializeAudioPlaybackEngine(): boolean; override;
- function StartAudioPlaybackEngine(): boolean; override;
- procedure StopAudioPlaybackEngine(); override;
- function FinalizeAudioPlaybackEngine(): boolean; override;
- function GetLatency(): double; override;
- public
- function GetName: String; override;
- end;
-
- TPortaudioOutputDevice = class(TAudioOutputDevice)
- private
- PaDeviceIndex: TPaDeviceIndex;
- end;
-
-
-{ TAudioPlayback_Portaudio }
-
-function PortaudioAudioCallback(input: Pointer; output: Pointer; frameCount: Longword;
- timeInfo: PPaStreamCallbackTimeInfo; statusFlags: TPaStreamCallbackFlags;
- userData: Pointer): Integer; cdecl;
-var
- Engine: TAudioPlayback_Portaudio;
-begin
- Engine := TAudioPlayback_Portaudio(userData);
- // update latency
- Engine.Latency := timeInfo.outputBufferDacTime - timeInfo.currentTime;
- // call superclass callback
- Engine.AudioCallback(output, frameCount * Engine.FormatInfo.FrameSize);
- Result := paContinue;
-end;
-
-function TAudioPlayback_Portaudio.GetName: String;
-begin
- Result := 'Portaudio_Playback';
-end;
-
-function TAudioPlayback_Portaudio.OpenDevice(deviceIndex: TPaDeviceIndex): boolean;
-var
- DeviceInfo : PPaDeviceInfo;
- SampleRate : double;
- OutParams : TPaStreamParameters;
- StreamInfo : PPaStreamInfo;
- err : TPaError;
-begin
- Result := false;
-
- DeviceInfo := Pa_GetDeviceInfo(deviceIndex);
-
- Log.LogInfo('Audio-Output Device: ' + DeviceInfo^.name, 'TAudioPlayback_Portaudio.OpenDevice');
-
- SampleRate := DeviceInfo^.defaultSampleRate;
-
- with OutParams do
- begin
- device := deviceIndex;
- channelCount := 2;
- sampleFormat := paInt16;
- suggestedLatency := DeviceInfo^.defaultLowOutputLatency;
- hostApiSpecificStreamInfo := nil;
- end;
-
- // check souncard and adjust sample-rate
- if not AudioCore.TestDevice(nil, @OutParams, SampleRate) then
- begin
- Log.LogStatus('TestDevice failed!', 'TAudioPlayback_Portaudio.OpenDevice');
- Exit;
- end;
-
- // open output stream
- err := Pa_OpenStream(paStream, nil, @OutParams, SampleRate,
- paFramesPerBufferUnspecified,
- paNoFlag, @PortaudioAudioCallback, Self);
- if(err <> paNoError) then
- begin
- Log.LogStatus(Pa_GetErrorText(err), 'TAudioPlayback_Portaudio.OpenDevice');
- paStream := nil;
- Exit;
- end;
-
- // get estimated latency (will be updated with real latency in the callback)
- StreamInfo := Pa_GetStreamInfo(paStream);
- if (StreamInfo <> nil) then
- Latency := StreamInfo^.outputLatency
- else
- Latency := 0;
-
- FormatInfo := TAudioFormatInfo.Create(
- OutParams.channelCount,
- SampleRate,
- asfS16 // FIXME: is paInt16 system-dependant or -independant?
- );
-
- Result := true;
-end;
-
-function TAudioPlayback_Portaudio.EnumDevices(): boolean;
-var
- i: integer;
- paApiIndex: TPaHostApiIndex;
- paApiInfo: PPaHostApiInfo;
- deviceName: string;
- deviceIndex: TPaDeviceIndex;
- deviceInfo: PPaDeviceInfo;
- channelCnt: integer;
- SC: integer; // soundcard
- err: TPaError;
- errMsg: string;
- paDevice: TPortaudioOutputDevice;
- outputParams: TPaStreamParameters;
- stream: PPaStream;
- streamInfo: PPaStreamInfo;
- sampleRate: double;
- latency: TPaTime;
- cbPolls: integer;
- cbWorks: boolean;
-begin
- Result := false;
-
-(*
- // choose the best available Audio-API
- paApiIndex := AudioCore.GetPreferredApiIndex();
- if(paApiIndex = -1) then
- begin
- Log.LogError('No working Audio-API found', 'TAudioPlayback_Portaudio.EnumDevices');
- Exit;
- end;
-
- paApiInfo := Pa_GetHostApiInfo(paApiIndex);
-
- SC := 0;
-
- // init array-size to max. output-devices count
- SetLength(OutputDeviceList, paApiInfo^.deviceCount);
- for i:= 0 to High(OutputDeviceList) do
- begin
- // convert API-specific device-index to global index
- deviceIndex := Pa_HostApiDeviceIndexToDeviceIndex(paApiIndex, i);
- deviceInfo := Pa_GetDeviceInfo(deviceIndex);
-
- channelCnt := deviceInfo^.maxOutputChannels;
-
- // current device is no output device -> skip
- if (channelCnt <= 0) then
- continue;
-
- // portaudio returns a channel-count of 128 for some devices
- // (e.g. the "default"-device), so we have to detect those
- // fantasy channel counts.
- if (channelCnt > 8) then
- channelCnt := 2;
-
- paDevice := TPortaudioOutputDevice.Create();
- OutputDeviceList[SC] := paDevice;
-
- // retrieve device-name
- deviceName := deviceInfo^.name;
- paDevice.Name := deviceName;
- paDevice.PaDeviceIndex := deviceIndex;
-
- if (deviceInfo^.defaultSampleRate > 0) then
- sampleRate := deviceInfo^.defaultSampleRate
- else
- sampleRate := 44100;
-
- // on vista and xp the defaultLowInputLatency may be set to 0 but it works.
- // TODO: correct too low latencies (what is a too low latency, maybe < 10ms?)
- latency := deviceInfo^.defaultLowInputLatency;
-
- // setup desired output parameters
- // TODO: retry with input-latency set to 20ms (defaultLowOutputLatency might
- // not be set correctly in OSS)
- with outputParams do
- begin
- device := deviceIndex;
- channelCount := channelCnt;
- sampleFormat := paInt16;
- suggestedLatency := latency;
- hostApiSpecificStreamInfo := nil;
- end;
-
- // check if mic-callback works (might not be called on some devices)
- if (not TAudioCore_Portaudio.TestDevice(nil, @outputParams, sampleRate)) then
- begin
- // ignore device if callback did not work
- Log.LogError('Device "'+paDevice.Name+'" does not respond',
- 'TAudioPlayback_Portaudio.InitializeRecord');
- paDevice.Free();
- continue;
- end;
-
- // open device for further info
- err := Pa_OpenStream(stream, nil, @outputParams, sampleRate,
- paFramesPerBufferUnspecified, paNoFlag, @MicrophoneTestCallback, nil);
- if(err <> paNoError) then
- begin
- // unable to open device -> skip
- errMsg := Pa_GetErrorText(err);
- Log.LogError('Device error: "'+ deviceName +'" ('+ errMsg +')',
- 'TAudioPlayback_Portaudio.InitializeRecord');
- paDevice.Free();
- continue;
- end;
-
- // adjust sample-rate (might be changed by portaudio)
- streamInfo := Pa_GetStreamInfo(stream);
- if (streamInfo <> nil) then
- begin
- if (sampleRate <> streamInfo^.sampleRate) then
- begin
- Log.LogStatus('Portaudio changed Samplerate from ' + FloatToStr(sampleRate) +
- ' to ' + FloatToStr(streamInfo^.sampleRate),
- 'TAudioInput_Portaudio.InitializeRecord');
- sampleRate := streamInfo^.sampleRate;
- end;
- end;
-
- // create audio-format info and resize capture-buffer array
- paDevice.AudioFormat := TAudioFormatInfo.Create(
- channelCnt,
- sampleRate,
- asfS16
- );
- SetLength(paDevice.CaptureChannel, paDevice.AudioFormat.Channels);
-
- Log.LogStatus('OutputDevice "'+paDevice.Name+'"@' +
- IntToStr(paDevice.AudioFormat.Channels)+'x'+
- FloatToStr(paDevice.AudioFormat.SampleRate)+'Hz ('+
- FloatTostr(outputParams.suggestedLatency)+'sec)' ,
- 'TAudioInput_Portaudio.InitializeRecord');
-
- // close test-stream
- Pa_CloseStream(stream);
-
- Inc(SC);
- end;
-
- // adjust size to actual input-device count
- SetLength(OutputDeviceList, SC);
-
- Log.LogStatus('#Output-Devices: ' + inttostr(SC), 'Portaudio');
-*)
-
- Result := true;
-end;
-
-function TAudioPlayback_Portaudio.InitializeAudioPlaybackEngine(): boolean;
-var
- paApiIndex : TPaHostApiIndex;
- paApiInfo : PPaHostApiInfo;
- paOutDevice : TPaDeviceIndex;
- err: TPaError;
-begin
- Result := false;
-
- AudioCore := TAudioCore_Portaudio.GetInstance();
-
- // initialize portaudio
- err := Pa_Initialize();
- if(err <> paNoError) then
- begin
- Log.LogError(Pa_GetErrorText(err), 'TAudioInput_Portaudio.InitializeRecord');
- Exit;
- end;
-
- paApiIndex := AudioCore.GetPreferredApiIndex();
- if(paApiIndex = -1) then
- begin
- Log.LogError('No working Audio-API found', 'TAudioPlayback_Portaudio.InitializeAudioPlaybackEngine');
- Exit;
- end;
-
- EnumDevices();
-
- paApiInfo := Pa_GetHostApiInfo(paApiIndex);
- Log.LogInfo('Audio-Output API-Type: ' + paApiInfo^.name, 'TAudioPlayback_Portaudio.OpenDevice');
-
- paOutDevice := paApiInfo^.defaultOutputDevice;
- if (not OpenDevice(paOutDevice)) then
- begin
- Exit;
- end;
-
- Result := true;
-end;
-
-function TAudioPlayback_Portaudio.StartAudioPlaybackEngine(): boolean;
-var
- err: TPaError;
-begin
- Result := false;
-
- if (paStream = nil) then
- Exit;
-
- err := Pa_StartStream(paStream);
- if(err <> paNoError) then
- begin
- Log.LogStatus('Pa_StartStream: '+Pa_GetErrorText(err), 'UAudioPlayback_Portaudio');
- Exit;
- end;
-
- Result := true;
-end;
-
-procedure TAudioPlayback_Portaudio.StopAudioPlaybackEngine();
-begin
- if (paStream <> nil) then
- Pa_StopStream(paStream);
-end;
-
-function TAudioPlayback_Portaudio.FinalizeAudioPlaybackEngine(): boolean;
-begin
- Pa_Terminate();
- Result := true;
-end;
-
-function TAudioPlayback_Portaudio.GetLatency(): double;
-begin
- Result := Latency;
-end;
-
-
-initialization
- MediaManager.Add(TAudioPlayback_Portaudio.Create);
-
-end.