diff options
Diffstat (limited to 'src/classes/UAudioPlayback_Bass.pas')
| -rw-r--r-- | src/classes/UAudioPlayback_Bass.pas | 731 |
1 files changed, 0 insertions, 731 deletions
diff --git a/src/classes/UAudioPlayback_Bass.pas b/src/classes/UAudioPlayback_Bass.pas deleted file mode 100644 index 41a91173..00000000 --- a/src/classes/UAudioPlayback_Bass.pas +++ /dev/null @@ -1,731 +0,0 @@ -unit UAudioPlayback_Bass; - -interface - -{$IFDEF FPC} - {$MODE Delphi} -{$ENDIF} - -{$I switches.inc} - -implementation - -uses - Classes, - SysUtils, - Math, - UIni, - UMain, - UMusic, - UAudioPlaybackBase, - UAudioCore_Bass, - ULog, - sdl, - bass; - -type - PHDSP = ^HDSP; - -type - TBassPlaybackStream = class(TAudioPlaybackStream) - private - Handle: HSTREAM; - NeedsRewind: boolean; - PausedSeek: boolean; // true if a seek was performed in pause state - - procedure Reset(); - function IsEOF(): boolean; - protected - function GetLatency(): double; override; - function GetLoop(): boolean; override; - procedure SetLoop(Enabled: boolean); override; - function GetLength(): real; override; - function GetStatus(): TStreamStatus; override; - function GetVolume(): single; override; - procedure SetVolume(Volume: single); override; - function GetPosition: real; override; - procedure SetPosition(Time: real); override; - public - constructor Create(); - destructor Destroy(); override; - - function Open(SourceStream: TAudioSourceStream): boolean; override; - procedure Close(); override; - - procedure Play(); override; - procedure Pause(); override; - procedure Stop(); override; - procedure FadeIn(Time: real; TargetVolume: single); override; - - procedure AddSoundEffect(Effect: TSoundEffect); override; - procedure RemoveSoundEffect(Effect: TSoundEffect); override; - - procedure GetFFTData(var Data: TFFTData); override; - function GetPCMData(var Data: TPCMData): Cardinal; override; - - function GetAudioFormatInfo(): TAudioFormatInfo; override; - - function ReadData(Buffer: PChar; BufferSize: integer): integer; - - property EOF: boolean READ IsEOF; - end; - -const - MAX_VOICE_DELAY = 0.020; // 20ms - -type - TBassVoiceStream = class(TAudioVoiceStream) - private - Handle: HSTREAM; - public - function Open(ChannelMap: integer; FormatInfo: TAudioFormatInfo): boolean; override; - procedure Close(); override; - - procedure WriteData(Buffer: PChar; BufferSize: integer); override; - function ReadData(Buffer: PChar; BufferSize: integer): integer; override; - function IsEOF(): boolean; override; - function IsError(): boolean; override; - end; - -type - TAudioPlayback_Bass = class(TAudioPlaybackBase) - private - function EnumDevices(): boolean; - protected - function GetLatency(): double; override; - function CreatePlaybackStream(): TAudioPlaybackStream; override; - public - function GetName: String; override; - function InitializePlayback(): boolean; override; - function FinalizePlayback: boolean; override; - procedure SetAppVolume(Volume: single); override; - function CreateVoiceStream(ChannelMap: integer; FormatInfo: TAudioFormatInfo): TAudioVoiceStream; override; - end; - - TBassOutputDevice = class(TAudioOutputDevice) - private - BassDeviceID: DWORD; // DeviceID used by BASS - end; - -var - BassCore: TAudioCore_Bass; - - -{ TBassPlaybackStream } - -function PlaybackStreamHandler(handle: HSTREAM; buffer: Pointer; length: DWORD; user: Pointer): DWORD; -{$IFDEF MSWINDOWS}stdcall;{$ELSE}cdecl;{$ENDIF} -var - PlaybackStream: TBassPlaybackStream; - BytesRead: integer; -begin - PlaybackStream := TBassPlaybackStream(user); - if (not assigned (PlaybackStream)) then - begin - Result := BASS_STREAMPROC_END; - Exit; - end; - - BytesRead := PlaybackStream.ReadData(buffer, length); - // check for errors - if (BytesRead < 0) then - Result := BASS_STREAMPROC_END - // check for EOF - else if (PlaybackStream.EOF) then - Result := BytesRead or BASS_STREAMPROC_END - // no error/EOF - else - Result := BytesRead; -end; - -function TBassPlaybackStream.ReadData(Buffer: PChar; BufferSize: integer): integer; -var - AdjustedSize: integer; - RequestedSourceSize, SourceSize: integer; - SkipCount: integer; - SourceFormatInfo: TAudioFormatInfo; - FrameSize: integer; - PadFrame: PChar; - //Info: BASS_INFO; - //Latency: double; -begin - Result := -1; - - if (not assigned(SourceStream)) then - Exit; - - // sanity check - if (BufferSize = 0) then - begin - Result := 0; - Exit; - end; - - SourceFormatInfo := SourceStream.GetAudioFormatInfo(); - FrameSize := SourceFormatInfo.FrameSize; - - // check how much data to fetch to be in synch - AdjustedSize := Synchronize(BufferSize, SourceFormatInfo); - - // skip data if we are too far behind - SkipCount := AdjustedSize - BufferSize; - while (SkipCount > 0) do - begin - RequestedSourceSize := Min(SkipCount, BufferSize); - SourceSize := SourceStream.ReadData(Buffer, RequestedSourceSize); - // if an error or EOF occured stop skipping and handle error/EOF with the next ReadData() - if (SourceSize <= 0) then - break; - Dec(SkipCount, SourceSize); - end; - - // get source data (e.g. from a decoder) - RequestedSourceSize := Min(AdjustedSize, BufferSize); - SourceSize := SourceStream.ReadData(Buffer, RequestedSourceSize); - if (SourceSize < 0) then - Exit; - - // set preliminary result - Result := SourceSize; - - // if we are to far ahead, fill output-buffer with last frame of source data - // Note that AdjustedSize is used instead of SourceSize as the SourceSize might - // be less than expected because of errors etc. - if (AdjustedSize < BufferSize) then - begin - // use either the last frame for padding or fill with zero - if (SourceSize >= FrameSize) then - PadFrame := @Buffer[SourceSize-FrameSize] - else - PadFrame := nil; - - FillBufferWithFrame(@Buffer[SourceSize], BufferSize - SourceSize, - PadFrame, FrameSize); - Result := BufferSize; - end; -end; - -constructor TBassPlaybackStream.Create(); -begin - inherited; - Reset(); -end; - -destructor TBassPlaybackStream.Destroy(); -begin - Close(); - inherited; -end; - -function TBassPlaybackStream.Open(SourceStream: TAudioSourceStream): boolean; -var - FormatInfo: TAudioFormatInfo; - FormatFlags: DWORD; -begin - Result := false; - - // close previous stream and reset state - Reset(); - - // sanity check if stream is valid - if not assigned(SourceStream) then - Exit; - - Self.SourceStream := SourceStream; - FormatInfo := SourceStream.GetAudioFormatInfo(); - if (not BassCore.ConvertAudioFormatToBASSFlags(FormatInfo.Format, FormatFlags)) then - begin - Log.LogError('Unhandled sample-format', 'TBassPlaybackStream.Open'); - Exit; - end; - - // create matching playback stream - Handle := BASS_StreamCreate(Round(FormatInfo.SampleRate), FormatInfo.Channels, formatFlags, - @PlaybackStreamHandler, Self); - if (Handle = 0) then - begin - Log.LogError('BASS_StreamCreate failed: ' + BassCore.ErrorGetString(BASS_ErrorGetCode()), - 'TBassPlaybackStream.Open'); - Exit; - end; - - Result := true; -end; - -procedure TBassPlaybackStream.Close(); -begin - // stop and free stream - if (Handle <> 0) then - begin - Bass_StreamFree(Handle); - Handle := 0; - end; - - // Note: PerformOnClose must be called before SourceStream is invalidated - PerformOnClose(); - // unset source-stream - SourceStream := nil; -end; - -procedure TBassPlaybackStream.Reset(); -begin - Close(); - NeedsRewind := false; - PausedSeek := false; -end; - -procedure TBassPlaybackStream.Play(); -var - NeedsFlush: boolean; -begin - if (not assigned(SourceStream)) then - Exit; - - NeedsFlush := true; - - if (BASS_ChannelIsActive(Handle) = BASS_ACTIVE_PAUSED) then - begin - // only paused (and not seeked while paused) streams are not flushed - if (not PausedSeek) then - NeedsFlush := false; - // paused streams do not need a rewind - NeedsRewind := false; - end; - - // rewind if necessary. Cases that require no rewind are: - // - stream was created and never played - // - stream was paused and is resumed now - // - stream was stopped and set to a new position already - if (NeedsRewind) then - SourceStream.Position := 0; - - NeedsRewind := true; - PausedSeek := false; - - // start playing and flush buffers on rewind - BASS_ChannelPlay(Handle, NeedsFlush); -end; - -procedure TBassPlaybackStream.FadeIn(Time: real; TargetVolume: single); -begin - // start stream - Play(); - // start fade-in: slide from fadeStart- to fadeEnd-volume in FadeInTime - BASS_ChannelSlideAttribute(Handle, BASS_ATTRIB_VOL, TargetVolume, Trunc(Time * 1000)); -end; - -procedure TBassPlaybackStream.Pause(); -begin - BASS_ChannelPause(Handle); -end; - -procedure TBassPlaybackStream.Stop(); -begin - BASS_ChannelStop(Handle); -end; - -function TBassPlaybackStream.IsEOF(): boolean; -begin - if (assigned(SourceStream)) then - Result := SourceStream.EOF - else - Result := true; -end; - -function TBassPlaybackStream.GetLatency(): double; -begin - // TODO: should we consider output latency for synching (needs BASS_DEVICE_LATENCY)? - //if (BASS_GetInfo(Info)) then - // Latency := Info.latency / 1000 - //else - // Latency := 0; - Result := 0; -end; - -function TBassPlaybackStream.GetVolume(): single; -var - lVolume: single; -begin - if (not BASS_ChannelGetAttribute(Handle, BASS_ATTRIB_VOL, lVolume)) then - begin - Log.LogError('BASS_ChannelGetAttribute: ' + BassCore.ErrorGetString(), - 'TBassPlaybackStream.GetVolume'); - Result := 0; - Exit; - end; - Result := Round(lVolume); -end; - -procedure TBassPlaybackStream.SetVolume(Volume: single); -begin - // clamp volume - if Volume < 0 then - Volume := 0; - if Volume > 1.0 then - Volume := 1.0; - // set volume - BASS_ChannelSetAttribute(Handle, BASS_ATTRIB_VOL, Volume); -end; - -function TBassPlaybackStream.GetPosition: real; -var - BufferPosByte: QWORD; - BufferPosSec: double; -begin - if assigned(SourceStream) then - begin - BufferPosByte := BASS_ChannelGetData(Handle, nil, BASS_DATA_AVAILABLE); - BufferPosSec := BASS_ChannelBytes2Seconds(Handle, BufferPosByte); - // decrease the decoding position by the amount buffered (and hence not played) - // in the BASS playback stream. - Result := SourceStream.Position - BufferPosSec; - end - else - begin - Result := -1; - end; -end; - -procedure TBassPlaybackStream.SetPosition(Time: real); -var - ChannelState: DWORD; -begin - if assigned(SourceStream) then - begin - ChannelState := BASS_ChannelIsActive(Handle); - if (ChannelState = BASS_ACTIVE_STOPPED) then - begin - // if the stream is stopped, do not rewind when the stream is played next time - NeedsRewind := false - end - else if (ChannelState = BASS_ACTIVE_PAUSED) then - begin - // buffers must be flushed if in paused state but there is no - // BASS_ChannelFlush() function so we have to use BASS_ChannelPlay() called in Play(). - PausedSeek := true; - end; - - // set new position - SourceStream.Position := Time; - end; -end; - -function TBassPlaybackStream.GetLength(): real; -begin - if assigned(SourceStream) then - Result := SourceStream.Length - else - Result := -1; -end; - -function TBassPlaybackStream.GetStatus(): TStreamStatus; -var - State: DWORD; -begin - State := BASS_ChannelIsActive(Handle); - case State of - BASS_ACTIVE_PLAYING, - BASS_ACTIVE_STALLED: - Result := ssPlaying; - BASS_ACTIVE_PAUSED: - Result := ssPaused; - BASS_ACTIVE_STOPPED: - Result := ssStopped; - else - begin - Log.LogError('Unknown status', 'TBassPlaybackStream.GetStatus'); - Result := ssStopped; - end; - end; -end; - -function TBassPlaybackStream.GetLoop(): boolean; -begin - if assigned(SourceStream) then - Result := SourceStream.Loop - else - Result := false; -end; - -procedure TBassPlaybackStream.SetLoop(Enabled: boolean); -begin - if assigned(SourceStream) then - SourceStream.Loop := Enabled; -end; - -procedure DSPProcHandler(handle: HDSP; channel: DWORD; buffer: Pointer; length: DWORD; user: Pointer); -{$IFDEF MSWINDOWS}stdcall;{$ELSE}cdecl;{$ENDIF} -var - Effect: TSoundEffect; -begin - Effect := TSoundEffect(user); - if assigned(Effect) then - Effect.Callback(buffer, length); -end; - -procedure TBassPlaybackStream.AddSoundEffect(Effect: TSoundEffect); -var - DspHandle: HDSP; -begin - if assigned(Effect.engineData) then - begin - Log.LogError('TSoundEffect.engineData already set', 'TBassPlaybackStream.AddSoundEffect'); - Exit; - end; - - DspHandle := BASS_ChannelSetDSP(Handle, @DSPProcHandler, Effect, 0); - if (DspHandle = 0) then - begin - Log.LogError(BassCore.ErrorGetString(), 'TBassPlaybackStream.AddSoundEffect'); - Exit; - end; - - GetMem(Effect.EngineData, SizeOf(HDSP)); - PHDSP(Effect.EngineData)^ := DspHandle; -end; - -procedure TBassPlaybackStream.RemoveSoundEffect(Effect: TSoundEffect); -begin - if not assigned(Effect.EngineData) then - begin - Log.LogError('TSoundEffect.engineData invalid', 'TBassPlaybackStream.RemoveSoundEffect'); - Exit; - end; - - if not BASS_ChannelRemoveDSP(Handle, PHDSP(Effect.EngineData)^) then - begin - Log.LogError(BassCore.ErrorGetString(), 'TBassPlaybackStream.RemoveSoundEffect'); - Exit; - end; - - FreeMem(Effect.EngineData); - Effect.EngineData := nil; -end; - -procedure TBassPlaybackStream.GetFFTData(var Data: TFFTData); -begin - // get FFT channel data (Mono, FFT512 -> 256 values) - BASS_ChannelGetData(Handle, @Data, BASS_DATA_FFT512); -end; - -{* - * Copies interleaved PCM SInt16 stereo samples into data. - * Returns the number of frames - *} -function TBassPlaybackStream.GetPCMData(var Data: TPCMData): Cardinal; -var - Info: BASS_CHANNELINFO; - nBytes: DWORD; -begin - Result := 0; - - FillChar(Data, SizeOf(TPCMData), 0); - - // no support for non-stereo files at the moment - BASS_ChannelGetInfo(Handle, Info); - if (Info.chans <> 2) then - Exit; - - nBytes := BASS_ChannelGetData(Handle, @Data, SizeOf(TPCMData)); - if(nBytes <= 0) then - Result := 0 - else - Result := nBytes div SizeOf(TPCMStereoSample); -end; - -function TBassPlaybackStream.GetAudioFormatInfo(): TAudioFormatInfo; -begin - if assigned(SourceStream) then - Result := SourceStream.GetAudioFormatInfo() - else - Result := nil; -end; - - -{ TBassVoiceStream } - -function TBassVoiceStream.Open(ChannelMap: integer; FormatInfo: TAudioFormatInfo): boolean; -var - Flags: DWORD; -begin - Result := false; - - Close(); - - if (not inherited Open(ChannelMap, FormatInfo)) then - Exit; - - // get channel flags - BassCore.ConvertAudioFormatToBASSFlags(FormatInfo.Format, Flags); - - (* - // distribute the mics equally to both speakers - if ((ChannelMap and CHANNELMAP_LEFT) <> 0) then - Flags := Flags or BASS_SPEAKER_FRONTLEFT; - if ((ChannelMap and CHANNELMAP_RIGHT) <> 0) then - Flags := Flags or BASS_SPEAKER_FRONTRIGHT; - *) - - // create the channel - Handle := BASS_StreamCreate(Round(FormatInfo.SampleRate), 1, Flags, STREAMPROC_PUSH, nil); - - // start the channel - BASS_ChannelPlay(Handle, true); - - Result := true; -end; - -procedure TBassVoiceStream.Close(); -begin - if (Handle <> 0) then - begin - BASS_ChannelStop(Handle); - BASS_StreamFree(Handle); - end; - inherited Close(); -end; - -procedure TBassVoiceStream.WriteData(Buffer: PChar; BufferSize: integer); -var QueueSize: DWORD; -begin - if ((Handle <> 0) and (BufferSize > 0)) then - begin - // query the queue size (normally 0) - QueueSize := BASS_StreamPutData(Handle, nil, 0); - // flush the buffer if the delay would be too high - if (QueueSize > MAX_VOICE_DELAY * FormatInfo.BytesPerSec) then - BASS_ChannelPlay(Handle, true); - // send new data to playback buffer - BASS_StreamPutData(Handle, Buffer, BufferSize); - end; -end; - -// Note: we do not need the read-function for the BASS implementation -function TBassVoiceStream.ReadData(Buffer: PChar; BufferSize: integer): integer; -begin - Result := -1; -end; - -function TBassVoiceStream.IsEOF(): boolean; -begin - Result := false; -end; - -function TBassVoiceStream.IsError(): boolean; -begin - Result := false; -end; - - -{ TAudioPlayback_Bass } - -function TAudioPlayback_Bass.GetName: String; -begin - Result := 'BASS_Playback'; -end; - -function TAudioPlayback_Bass.EnumDevices(): boolean; -var - BassDeviceID: DWORD; - DeviceIndex: integer; - Device: TBassOutputDevice; - DeviceInfo: BASS_DEVICEINFO; -begin - Result := true; - - ClearOutputDeviceList(); - - // skip "no sound"-device (ID = 0) - BassDeviceID := 1; - - while (true) do - begin - // check for device - if (not BASS_GetDeviceInfo(BassDeviceID, DeviceInfo)) then - Break; - - // set device info - Device := TBassOutputDevice.Create(); - Device.Name := DeviceInfo.name; - Device.BassDeviceID := BassDeviceID; - - // add device to list - SetLength(OutputDeviceList, BassDeviceID); - OutputDeviceList[BassDeviceID-1] := Device; - - Inc(BassDeviceID); - end; -end; - -function TAudioPlayback_Bass.InitializePlayback(): boolean; -begin - result := false; - - BassCore := TAudioCore_Bass.GetInstance(); - - EnumDevices(); - - //Log.BenchmarkStart(4); - //Log.LogStatus('Initializing Playback Subsystem', 'Music Initialize'); - - // TODO: use BASS_DEVICE_LATENCY to determine the latency - if not BASS_Init(-1, 44100, 0, 0, nil) then - begin - Log.LogError('Could not initialize BASS', 'TAudioPlayback_Bass.InitializePlayback'); - Exit; - end; - - //Log.BenchmarkEnd(4); Log.LogBenchmark('--> Bass Init', 4); - - // config playing buffer - //BASS_SetConfig(BASS_CONFIG_UPDATEPERIOD, 10); - //BASS_SetConfig(BASS_CONFIG_BUFFER, 100); - - result := true; -end; - -function TAudioPlayback_Bass.FinalizePlayback(): boolean; -begin - Close; - BASS_Free; - inherited FinalizePlayback(); - Result := true; -end; - -function TAudioPlayback_Bass.CreatePlaybackStream(): TAudioPlaybackStream; -begin - Result := TBassPlaybackStream.Create(); -end; - -procedure TAudioPlayback_Bass.SetAppVolume(Volume: single); -begin - // set volume for this application (ranges from 0..10000 since BASS 2.4) - BASS_SetConfig(BASS_CONFIG_GVOL_STREAM, Round(Volume*10000)); -end; - -function TAudioPlayback_Bass.CreateVoiceStream(ChannelMap: integer; FormatInfo: TAudioFormatInfo): TAudioVoiceStream; -var - VoiceStream: TAudioVoiceStream; -begin - Result := nil; - - VoiceStream := TBassVoiceStream.Create(); - if (not VoiceStream.Open(ChannelMap, FormatInfo)) then - begin - VoiceStream.Free; - Exit; - end; - - Result := VoiceStream; -end; - -function TAudioPlayback_Bass.GetLatency(): double; -begin - Result := 0; -end; - - -initialization - MediaManager.Add(TAudioPlayback_Bass.Create); - -end. |