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-rw-r--r--src/classes0/UAudioInput_Bass.pas481
1 files changed, 481 insertions, 0 deletions
diff --git a/src/classes0/UAudioInput_Bass.pas b/src/classes0/UAudioInput_Bass.pas
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+unit UAudioInput_Bass;
+
+interface
+
+{$IFDEF FPC}
+ {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+
+uses
+ Classes,
+ SysUtils,
+ URecord,
+ UMusic;
+
+implementation
+
+uses
+ UMain,
+ UIni,
+ ULog,
+ UAudioCore_Bass,
+ UCommon, // (Note: for MakeLong on non-windows platforms)
+ {$IFDEF MSWINDOWS}
+ Windows, // (Note: for MakeLong)
+ {$ENDIF}
+ bass; // (Note: DWORD is redefined here -> insert after Windows-unit)
+
+type
+ TAudioInput_Bass = class(TAudioInputBase)
+ private
+ function EnumDevices(): boolean;
+ public
+ function GetName: String; override;
+ function InitializeRecord: boolean; override;
+ function FinalizeRecord: boolean; override;
+ end;
+
+ TBassInputDevice = class(TAudioInputDevice)
+ private
+ RecordStream: HSTREAM;
+ BassDeviceID: DWORD; // DeviceID used by BASS
+ SingleIn: boolean;
+
+ function SetInputSource(SourceIndex: integer): boolean;
+ function GetInputSource(): integer;
+ 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;
+
+var
+ BassCore: TAudioCore_Bass;
+
+
+{ Global }
+
+{*
+ * Bass input capture callback.
+ * Params:
+ * stream - BASS input stream
+ * buffer - buffer of captured samples
+ * len - size of buffer in bytes
+ * user - players associated with left/right channels
+ *}
+function MicrophoneCallback(stream: HSTREAM; buffer: Pointer;
+ len: Cardinal; inputDevice: Pointer): boolean; {$IFDEF MSWINDOWS}stdcall;{$ELSE}cdecl;{$ENDIF}
+begin
+ AudioInputProcessor.HandleMicrophoneData(buffer, len, inputDevice);
+ Result := true;
+end;
+
+
+{ TBassInputDevice }
+
+function TBassInputDevice.GetInputSource(): integer;
+var
+ SourceCnt: integer;
+ i: integer;
+ flags: DWORD;
+begin
+ // get input-source config (subtract virtual device to get BASS indices)
+ SourceCnt := Length(Source)-1;
+
+ // find source
+ Result := -1;
+ for i := 0 to SourceCnt-1 do
+ begin
+ // get input settings
+ flags := BASS_RecordGetInput(i, PSingle(nil)^);
+ if (flags = DWORD(-1)) then
+ begin
+ Log.LogError('BASS_RecordGetInput: ' + BassCore.ErrorGetString(), 'TBassInputDevice.GetInputSource');
+ Exit;
+ end;
+
+ // check if current source is selected
+ if ((flags and BASS_INPUT_OFF) = 0) then
+ begin
+ // selected source found
+ Result := i;
+ Exit;
+ end;
+ end;
+end;
+
+function TBassInputDevice.SetInputSource(SourceIndex: integer): boolean;
+var
+ SourceCnt: integer;
+ i: integer;
+ flags: DWORD;
+begin
+ Result := false;
+
+ // check for invalid source index
+ if (SourceIndex < 0) then
+ Exit;
+
+ // get input-source config (subtract virtual device to get BASS indices)
+ SourceCnt := Length(Source)-1;
+
+ // turn on selected source (turns off the others for single-in devices)
+ if (not BASS_RecordSetInput(SourceIndex, BASS_INPUT_ON, -1)) then
+ begin
+ Log.LogError('BASS_RecordSetInput: ' + BassCore.ErrorGetString(), 'TBassInputDevice.Start');
+ Exit;
+ end;
+
+ // turn off all other sources (not needed for single-in devices)
+ if (not SingleIn) then
+ begin
+ for i := 0 to SourceCnt-1 do
+ begin
+ if (i = SourceIndex) then
+ continue;
+ // get input settings
+ flags := BASS_RecordGetInput(i, PSingle(nil)^);
+ if (flags = DWORD(-1)) then
+ begin
+ Log.LogError('BASS_RecordGetInput: ' + BassCore.ErrorGetString(), 'TBassInputDevice.GetInputSource');
+ Exit;
+ end;
+ // deselect source if selected
+ if ((flags and BASS_INPUT_OFF) = 0) then
+ BASS_RecordSetInput(i, BASS_INPUT_OFF, -1);
+ end;
+ end;
+
+ Result := true;
+end;
+
+function TBassInputDevice.Open(): boolean;
+var
+ FormatFlags: DWORD;
+ SourceIndex: integer;
+const
+ latency = 20; // 20ms callback period (= latency)
+begin
+ Result := false;
+
+ if (not BASS_RecordInit(BassDeviceID)) then
+ begin
+ Log.LogError('BASS_RecordInit['+Name+']: ' +
+ BassCore.ErrorGetString(), 'TBassInputDevice.Open');
+ Exit;
+ end;
+
+ if (not BassCore.ConvertAudioFormatToBASSFlags(AudioFormat.Format, FormatFlags)) then
+ begin
+ Log.LogError('Unhandled sample-format', 'TBassInputDevice.Open');
+ Exit;
+ end;
+
+ // start capturing in paused state
+ RecordStream := BASS_RecordStart(Round(AudioFormat.SampleRate), AudioFormat.Channels,
+ MakeLong(FormatFlags or BASS_RECORD_PAUSE, latency),
+ @MicrophoneCallback, Self);
+ if (RecordStream = 0) then
+ begin
+ Log.LogError('BASS_RecordStart: ' + BassCore.ErrorGetString(), 'TBassInputDevice.Open');
+ BASS_RecordFree;
+ Exit;
+ end;
+
+ // 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 := GetInputSource();
+ SetInputSource(SourceIndex);
+ end;
+
+ Result := true;
+end;
+
+{* Start input-capturing on this device. *}
+function TBassInputDevice.Start(): boolean;
+begin
+ Result := false;
+
+ // recording already started -> stop first
+ if (RecordStream <> 0) then
+ Stop();
+
+ // TODO: Do not open the device here (takes too much time).
+ if not Open() then
+ Exit;
+
+ if (not BASS_ChannelPlay(RecordStream, true)) then
+ begin
+ Log.LogError('BASS_ChannelPlay: ' + BassCore.ErrorGetString(), 'TBassInputDevice.Start');
+ Exit;
+ end;
+
+ Result := true;
+end;
+
+{* Stop input-capturing on this device. *}
+function TBassInputDevice.Stop(): boolean;
+begin
+ Result := false;
+
+ if (RecordStream = 0) then
+ Exit;
+ if (not BASS_RecordSetDevice(BassDeviceID)) then
+ Exit;
+
+ if (not BASS_ChannelStop(RecordStream)) then
+ begin
+ Log.LogError('BASS_ChannelStop: ' + BassCore.ErrorGetString(), 'TBassInputDevice.Stop');
+ end;
+
+ // TODO: Do not close the device here (takes too much time).
+ Result := Close();
+end;
+
+function TBassInputDevice.Close(): boolean;
+begin
+ // restore source selection
+ if (SourceRestore >= 0) then
+ begin
+ SetInputSource(SourceRestore);
+ end;
+
+ // free data
+ if (not BASS_RecordFree()) then
+ begin
+ Log.LogError('BASS_RecordFree: ' + BassCore.ErrorGetString(), 'TBassInputDevice.Close');
+ Result := false;
+ end
+ else
+ begin
+ Result := true;
+ end;
+
+ RecordStream := 0;
+end;
+
+function TBassInputDevice.GetVolume(): single;
+var
+ SourceIndex: integer;
+ lVolume: Single;
+begin
+ Result := 0;
+
+ SourceIndex := Ini.InputDeviceConfig[CfgIndex].Input-1;
+ if (SourceIndex = -1) then
+ begin
+ // if default source used find selected source
+ SourceIndex := GetInputSource();
+ if (SourceIndex = -1) then
+ Exit;
+ end;
+
+ if (BASS_RecordGetInput(SourceIndex, lVolume) = DWORD(-1)) then
+ begin
+ Log.LogError('BASS_RecordGetInput: ' + BassCore.ErrorGetString() , 'TBassInputDevice.GetVolume');
+ Exit;
+ end;
+ Result := lVolume;
+end;
+
+procedure TBassInputDevice.SetVolume(Volume: single);
+var
+ SourceIndex: integer;
+begin
+ SourceIndex := Ini.InputDeviceConfig[CfgIndex].Input-1;
+ if (SourceIndex = -1) then
+ begin
+ // if default source used find selected source
+ SourceIndex := GetInputSource();
+ if (SourceIndex = -1) then
+ Exit;
+ end;
+
+ // clip volume to valid range
+ if (Volume > 1.0) then
+ Volume := 1.0
+ else if (Volume < 0) then
+ Volume := 0;
+
+ if (not BASS_RecordSetInput(SourceIndex, 0, Volume)) then
+ begin
+ Log.LogError('BASS_RecordSetInput: ' + BassCore.ErrorGetString() , 'TBassInputDevice.SetVolume');
+ end;
+end;
+
+
+{ TAudioInput_Bass }
+
+function TAudioInput_Bass.GetName: String;
+begin
+ result := 'BASS_Input';
+end;
+
+function TAudioInput_Bass.EnumDevices(): boolean;
+var
+ Descr: PChar;
+ SourceName: PChar;
+ Flags: integer;
+ BassDeviceID: integer;
+ BassDevice: TBassInputDevice;
+ DeviceIndex: integer;
+ DeviceInfo: BASS_DEVICEINFO;
+ SourceIndex: integer;
+ RecordInfo: BASS_RECORDINFO;
+ SelectedSourceIndex: integer;
+begin
+ result := false;
+
+ DeviceIndex := 0;
+ BassDeviceID := 0;
+ SetLength(AudioInputProcessor.DeviceList, 0);
+
+ // checks for recording devices and puts them into an array
+ while true do
+ begin
+ if (not BASS_RecordGetDeviceInfo(BassDeviceID, DeviceInfo)) then
+ break;
+
+ // try to initialize the device
+ if not BASS_RecordInit(BassDeviceID) then
+ begin
+ Log.LogStatus('Failed to initialize BASS Capture-Device['+inttostr(BassDeviceID)+']',
+ 'TAudioInput_Bass.InitializeRecord');
+ end
+ else
+ begin
+ SetLength(AudioInputProcessor.DeviceList, DeviceIndex+1);
+
+ // TODO: free object on termination
+ BassDevice := TBassInputDevice.Create();
+ AudioInputProcessor.DeviceList[DeviceIndex] := BassDevice;
+
+ Descr := DeviceInfo.name;
+
+ BassDevice.BassDeviceID := BassDeviceID;
+ BassDevice.Name := UnifyDeviceName(Descr, DeviceIndex);
+
+ // zero info-struct as some fields might not be set (e.g. freq is just set on Vista and MacOSX)
+ FillChar(RecordInfo, SizeOf(RecordInfo), 0);
+ // retrieve recording device info
+ BASS_RecordGetInfo(RecordInfo);
+
+ // check if BASS has capture-freq. info
+ if (RecordInfo.freq > 0) then
+ begin
+ // use current input sample rate (available only on Windows Vista and OSX).
+ // Recording at this rate will give the best quality and performance, as no resampling is required.
+ // FIXME: does BASS use LSB/MSB or system integer values for 16bit?
+ BassDevice.AudioFormat := TAudioFormatInfo.Create(2, RecordInfo.freq, asfS16)
+ end
+ else
+ begin
+ // BASS does not provide an explizit input channel count (except BASS_RECORDINFO.formats)
+ // but it doesn't fail if we use stereo input on a mono device
+ // -> use stereo by default
+ BassDevice.AudioFormat := TAudioFormatInfo.Create(2, 44100, asfS16)
+ end;
+
+ // get info if multiple input-sources can be selected at once
+ BassDevice.SingleIn := RecordInfo.singlein;
+
+ // init list for capture buffers per channel
+ SetLength(BassDevice.CaptureChannel, BassDevice.AudioFormat.Channels);
+
+ BassDevice.MicSource := -1;
+ BassDevice.SourceRestore := -1;
+
+ // add a virtual default source (will not change mixer-settings)
+ SetLength(BassDevice.Source, 1);
+ BassDevice.Source[0].Name := DEFAULT_SOURCE_NAME;
+
+ // add real input sources
+ SourceIndex := 1;
+
+ // process each input
+ while true do
+ begin
+ SourceName := BASS_RecordGetInputName(SourceIndex-1);
+
+ {$IFDEF DARWIN}
+ // Under MacOSX the SingStar Mics have an empty InputName.
+ // So, we have to add a hard coded Workaround for this problem
+ // FIXME: - Do we need this anymore? Doesn't the (new) default source already solve this problem?
+ // - Normally a nil return value of BASS_RecordGetInputName() means end-of-list, so maybe
+ // BASS is not able to detect any mic-sources (the default source will work then).
+ // - Does BASS_RecordGetInfo() return true or false? If it returns true in this case
+ // we could use this value to check if the device exists.
+ // Please check that, eddie.
+ // If it returns false, then the source is not detected and it does not make sense to add a second
+ // fake device here.
+ // What about BASS_RecordGetInput()? Does it return a value <> -1?
+ // - Does it even work at all with this fake source-index, now that input switching works?
+ // This info was not used before (sources were never switched), so it did not matter what source-index was used.
+ // But now BASS_RecordSetInput() will probably fail.
+ if ((SourceName = nil) and (SourceIndex = 1) and (Pos('USBMIC Serial#', Descr) > 0)) then
+ SourceName := 'Microphone'
+ {$ENDIF}
+
+ if (SourceName = nil) then
+ break;
+
+ SetLength(BassDevice.Source, Length(BassDevice.Source)+1);
+ BassDevice.Source[SourceIndex].Name := SourceName;
+
+ // get input-source info
+ Flags := BASS_RecordGetInput(SourceIndex, PSingle(nil)^);
+ if (Flags <> -1) then
+ begin
+ // is the current source a mic-source?
+ if ((Flags and BASS_INPUT_TYPE_MIC) <> 0) then
+ BassDevice.MicSource := SourceIndex;
+ end;
+
+ Inc(SourceIndex);
+ end;
+
+ // FIXME: this call hangs in FPC (windows) every 2nd time USDX is called.
+ // Maybe because the sound-device was not released properly?
+ BASS_RecordFree;
+
+ Inc(DeviceIndex);
+ end;
+
+ Inc(BassDeviceID);
+ end;
+
+ result := true;
+end;
+
+function TAudioInput_Bass.InitializeRecord(): boolean;
+begin
+ BassCore := TAudioCore_Bass.GetInstance();
+ Result := EnumDevices();
+end;
+
+function TAudioInput_Bass.FinalizeRecord(): boolean;
+begin
+ CaptureStop;
+ Result := inherited FinalizeRecord;
+end;
+
+
+initialization
+ MediaManager.Add(TAudioInput_Bass.Create);
+
+end.