diff options
Diffstat (limited to 'src/base/UAudioInput_Portaudio.pas')
| -rw-r--r-- | src/base/UAudioInput_Portaudio.pas | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/src/base/UAudioInput_Portaudio.pas b/src/base/UAudioInput_Portaudio.pas new file mode 100644 index 00000000..9a1c3e99 --- /dev/null +++ b/src/base/UAudioInput_Portaudio.pas @@ -0,0 +1,474 @@ +unit UAudioInput_Portaudio; + +interface + +{$IFDEF FPC} + {$MODE Delphi} +{$ENDIF} + +{$I ../switches.inc} + + +uses + Classes, + SysUtils, + UMusic; + +implementation + +uses + {$IFDEF UsePortmixer} + portmixer, + {$ENDIF} + portaudio, + UAudioCore_Portaudio, + URecord, + UIni, + ULog, + UMain; + +type + TAudioInput_Portaudio = class(TAudioInputBase) + private + AudioCore: TAudioCore_Portaudio; + function EnumDevices(): boolean; + public + function GetName: String; override; + function InitializeRecord: boolean; override; + function FinalizeRecord: boolean; override; + end; + + TPortaudioInputDevice = class(TAudioInputDevice) + private + RecordStream: PPaStream; + {$IFDEF UsePortmixer} + Mixer: PPxMixer; + {$ENDIF} + PaDeviceIndex: TPaDeviceIndex; + public + function Open(): boolean; + function Close(): boolean; + function Start(): boolean; override; + function Stop(): boolean; override; + + function GetVolume(): single; override; + procedure SetVolume(Volume: single); override; + end; + +function MicrophoneCallback(input: Pointer; output: Pointer; frameCount: Longword; + timeInfo: PPaStreamCallbackTimeInfo; statusFlags: TPaStreamCallbackFlags; + inputDevice: Pointer): Integer; cdecl; forward; + +function MicrophoneTestCallback(input: Pointer; output: Pointer; frameCount: Longword; + timeInfo: PPaStreamCallbackTimeInfo; statusFlags: TPaStreamCallbackFlags; + inputDevice: Pointer): Integer; cdecl; forward; + + +{ TPortaudioInputDevice } + +function TPortaudioInputDevice.Open(): boolean; +var + Error: TPaError; + inputParams: TPaStreamParameters; + deviceInfo: PPaDeviceInfo; + SourceIndex: integer; +begin + Result := false; + + // get input latency info + deviceInfo := Pa_GetDeviceInfo(PaDeviceIndex); + + // set input stream parameters + with inputParams do + begin + device := PaDeviceIndex; + channelCount := AudioFormat.Channels; + sampleFormat := paInt16; + suggestedLatency := deviceInfo^.defaultLowInputLatency; + hostApiSpecificStreamInfo := nil; + end; + + //Log.LogStatus(deviceInfo^.name, 'Portaudio'); + //Log.LogStatus(floattostr(deviceInfo^.defaultLowInputLatency), 'Portaudio'); + + // open input stream + Error := Pa_OpenStream(RecordStream, @inputParams, nil, + AudioFormat.SampleRate, + paFramesPerBufferUnspecified, paNoFlag, + @MicrophoneCallback, Pointer(Self)); + if(Error <> paNoError) then + begin + Log.LogError('Error opening stream: ' + Pa_GetErrorText(Error), 'TPortaudioInputDevice.Open'); + Exit; + end; + + {$IFDEF UsePortmixer} + // open default mixer + Mixer := Px_OpenMixer(RecordStream, 0); + if (Mixer = nil) then + begin + Log.LogError('Error opening mixer: ' + Pa_GetErrorText(Error), 'TPortaudioInputDevice.Open'); + end + else + begin + // save current source selection and select new source + SourceIndex := Ini.InputDeviceConfig[CfgIndex].Input-1; + if (SourceIndex = -1) then + begin + // nothing to do if default source is used + SourceRestore := -1; + end + else + begin + // store current source-index and select new source + SourceRestore := Px_GetCurrentInputSource(Mixer); // -1 in error case + Px_SetCurrentInputSource(Mixer, SourceIndex); + end; + end; + {$ENDIF} + + Result := true; +end; + +function TPortaudioInputDevice.Start(): boolean; +var + Error: TPaError; +begin + Result := false; + + // recording already started -> stop first + if (RecordStream <> nil) then + Stop(); + + // TODO: Do not open the device here (takes too much time). + if (not Open()) then + Exit; + + // start capture + Error := Pa_StartStream(RecordStream); + if(Error <> paNoError) then + begin + Log.LogError('Error starting stream: ' + Pa_GetErrorText(Error), 'TPortaudioInputDevice.Start'); + Close(); + RecordStream := nil; + Exit; + end; + + Result := true; +end; + +function TPortaudioInputDevice.Stop(): boolean; +var + Error: TPaError; +begin + Result := false; + + if (RecordStream = nil) then + Exit; + + // Note: do NOT call Pa_StopStream here! + // It gets stuck on devices with non-working callback as Pa_StopStream + // waits until all buffers have been handled (which never occurs in that case). + Error := Pa_AbortStream(RecordStream); + if (Error <> paNoError) then + begin + Log.LogError('Pa_AbortStream: ' + Pa_GetErrorText(Error), 'TPortaudioInputDevice.Stop'); + end; + + Result := Close(); +end; + +function TPortaudioInputDevice.Close(): boolean; +var + Error: TPaError; +begin + {$IFDEF UsePortmixer} + if (Mixer <> nil) then + begin + // restore source selection + if (SourceRestore >= 0) then + begin + Px_SetCurrentInputSource(Mixer, SourceRestore); + end; + + // close mixer + Px_CloseMixer(Mixer); + Mixer := nil; + end; + {$ENDIF} + + Error := Pa_CloseStream(RecordStream); + if (Error <> paNoError) then + begin + Log.LogError('Pa_CloseStream: ' + Pa_GetErrorText(Error), 'TPortaudioInputDevice.Close'); + Result := false; + end + else + begin + Result := true; + end; + + RecordStream := nil; +end; + +function TPortaudioInputDevice.GetVolume(): single; +begin + Result := 0; + {$IFDEF UsePortmixer} + if (Mixer <> nil) then + Result := Px_GetInputVolume(Mixer); + {$ENDIF} +end; + +procedure TPortaudioInputDevice.SetVolume(Volume: single); +begin + {$IFDEF UsePortmixer} + if (Mixer <> nil) then + begin + // clip to valid range + if (Volume > 1.0) then + Volume := 1.0 + else if (Volume < 0) then + Volume := 0; + Px_SetInputVolume(Mixer, Volume); + end; + {$ENDIF} +end; + + +{ TAudioInput_Portaudio } + +function TAudioInput_Portaudio.GetName: String; +begin + result := 'Portaudio'; +end; + +function TAudioInput_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: TPortaudioInputDevice; + inputParams: TPaStreamParameters; + stream: PPaStream; + streamInfo: PPaStreamInfo; + sampleRate: double; + latency: TPaTime; + {$IFDEF UsePortmixer} + mixer: PPxMixer; + sourceCnt: integer; + sourceIndex: integer; + sourceName: string; + {$ENDIF} + 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', 'TAudioInput_Portaudio.EnumDevices'); + Exit; + end; + + paApiInfo := Pa_GetHostApiInfo(paApiIndex); + + SC := 0; + + // init array-size to max. input-devices count + SetLength(AudioInputProcessor.DeviceList, paApiInfo^.deviceCount); + for i:= 0 to High(AudioInputProcessor.DeviceList) do + begin + // convert API-specific device-index to global index + deviceIndex := Pa_HostApiDeviceIndexToDeviceIndex(paApiIndex, i); + deviceInfo := Pa_GetDeviceInfo(deviceIndex); + + channelCnt := deviceInfo^.maxInputChannels; + + // current device is no input 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 := TPortaudioInputDevice.Create(); + AudioInputProcessor.DeviceList[SC] := paDevice; + + // retrieve device-name + deviceName := deviceInfo^.name; + paDevice.Name := deviceName; + paDevice.PaDeviceIndex := deviceIndex; + + sampleRate := deviceInfo^.defaultSampleRate; + + // 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 input parameters + // TODO: retry with input-latency set to 20ms (defaultLowInputLatency might + // not be set correctly in OSS) + with inputParams do + begin + device := deviceIndex; + channelCount := channelCnt; + sampleFormat := paInt16; + suggestedLatency := latency; + hostApiSpecificStreamInfo := nil; + end; + + // check souncard and adjust sample-rate + if (not AudioCore.TestDevice(@inputParams, nil, sampleRate)) then + begin + // ignore device if it does not work + Log.LogError('Device "'+paDevice.Name+'" does not work', + 'TAudioInput_Portaudio.EnumDevices'); + paDevice.Free(); + continue; + end; + + // open device for further info + err := Pa_OpenStream(stream, @inputParams, nil, 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 +')', + 'TAudioInput_Portaudio.EnumDevices'); + 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('InputDevice "'+paDevice.Name+'"@' + + IntToStr(paDevice.AudioFormat.Channels)+'x'+ + FloatToStr(paDevice.AudioFormat.SampleRate)+'Hz ('+ + FloatTostr(inputParams.suggestedLatency)+'sec)' , + 'Portaudio.EnumDevices'); + + // portaudio does not provide a source-type check + paDevice.MicSource := -1; + paDevice.SourceRestore := -1; + + // add a virtual default source (will not change mixer-settings) + SetLength(paDevice.Source, 1); + paDevice.Source[0].Name := DEFAULT_SOURCE_NAME; + + {$IFDEF UsePortmixer} + // use default mixer + mixer := Px_OpenMixer(stream, 0); + + // get input count + sourceCnt := Px_GetNumInputSources(mixer); + SetLength(paDevice.Source, sourceCnt+1); + + // get input names + for sourceIndex := 1 to sourceCnt do + begin + sourceName := Px_GetInputSourceName(mixer, sourceIndex-1); + paDevice.Source[sourceIndex].Name := sourceName; + end; + + Px_CloseMixer(mixer); + {$ENDIF} + + // close test-stream + Pa_CloseStream(stream); + + Inc(SC); + end; + + // adjust size to actual input-device count + SetLength(AudioInputProcessor.DeviceList, SC); + + Log.LogStatus('#Input-Devices: ' + inttostr(SC), 'Portaudio'); + + Result := true; +end; + +function TAudioInput_Portaudio.InitializeRecord(): boolean; +var + err: TPaError; +begin + AudioCore := TAudioCore_Portaudio.GetInstance(); + + // initialize portaudio + err := Pa_Initialize(); + if(err <> paNoError) then + begin + Log.LogError(Pa_GetErrorText(err), 'TAudioInput_Portaudio.InitializeRecord'); + Result := false; + Exit; + end; + + Result := EnumDevices(); +end; + +function TAudioInput_Portaudio.FinalizeRecord: boolean; +begin + CaptureStop; + Pa_Terminate(); + Result := inherited FinalizeRecord(); +end; + +{* + * Portaudio input capture callback. + *} +function MicrophoneCallback(input: Pointer; output: Pointer; frameCount: Longword; + timeInfo: PPaStreamCallbackTimeInfo; statusFlags: TPaStreamCallbackFlags; + inputDevice: Pointer): Integer; cdecl; +begin + AudioInputProcessor.HandleMicrophoneData(input, frameCount*4, inputDevice); + result := paContinue; +end; + +{* + * Portaudio test capture callback. + *} +function MicrophoneTestCallback(input: Pointer; output: Pointer; frameCount: Longword; + timeInfo: PPaStreamCallbackTimeInfo; statusFlags: TPaStreamCallbackFlags; + inputDevice: Pointer): Integer; cdecl; +begin + // this callback is called only once + result := paAbort; +end; + + +initialization + MediaManager.add(TAudioInput_Portaudio.Create); + +end. |