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Diffstat (limited to 'src/base/UMusic.pas')
| -rw-r--r-- | src/base/UMusic.pas | 1233 |
1 files changed, 1233 insertions, 0 deletions
diff --git a/src/base/UMusic.pas b/src/base/UMusic.pas new file mode 100644 index 00000000..6476f629 --- /dev/null +++ b/src/base/UMusic.pas @@ -0,0 +1,1233 @@ +unit UMusic; + +interface + +{$IFDEF FPC} + {$MODE Delphi} +{$ENDIF} + +{$I switches.inc} + +uses + UTime, + Classes; + +type + TNoteType = (ntFreestyle, ntNormal, ntGolden); + + (** + * TLineFragment represents a fragment of a lyrics line. + * This is a text-fragment (e.g. a syllable) assigned to a note pitch, + * represented by a bar in the sing-screen. + *) + PLineFragment = ^TLineFragment; + TLineFragment = record + Color: integer; + Start: integer; // beat the fragment starts at + Length: integer; // length in beats + Tone: integer; // full range tone + Text: string; // text assigned to this fragment (a syllable, word, etc.) + NoteType: TNoteType; // note-type: golden-note/freestyle etc. + end; + + (** + * TLine represents one lyrics line and consists of multiple + * notes. + *) + PLine = ^TLine; + TLine = record + Start: integer; // the start beat of this line (<> start beat of the first note of this line) + Lyric: string; + LyricWidth: real; // @deprecated: width of the line in pixels. + // Do not use this as the width is not correct. + // Use TLyricsEngine.GetUpperLine().Width instead. + End_: integer; + BaseNote: integer; + HighNote: integer; // index of last note in line (= High(Note)?) + TotalNotes: integer; // value of all notes in the line + LastLine: boolean; + Note: array of TLineFragment; + end; + + (** + * TLines stores sets of lyric lines and information on them. + * Normally just one set is defined but in duet mode it might for example + * contain two sets. + *) + TLines = record + Current: integer; // for drawing of current line + High: integer; // (= High(Line)?) + Number: integer; + Resolution: integer; + NotesGAP: integer; + ScoreValue: integer; + Line: array of TLine; + end; + + (** + * TLyricsState contains all information concerning the + * state of the lyrics, e.g. the current beat or duration of the lyrics. + *) + TLyricsState = class + private + Timer: TRelativeTimer; // keeps track of the current time + public + OldBeat: integer; // previous discovered beat + CurrentBeat: integer; // current beat (rounded) + MidBeat: real; // current beat (float) + + // now we use this for super synchronization! + // only used when analyzing voice + // TODO: change ...D to ...Detect(ed) + OldBeatD: integer; // previous discovered beat + CurrentBeatD: integer; // current discovered beat (rounded) + MidBeatD: real; // current discovered beat (float) + + // we use this for audible clicks + // TODO: Change ...C to ...Click + OldBeatC: integer; // previous discovered beat + CurrentBeatC: integer; + MidBeatC: real; // like CurrentBeatC + + OldLine: integer; // previous displayed sentence + + StartTime: real; // time till start of lyrics (= Gap) + TotalTime: real; // total song time + + constructor Create(); + procedure Pause(); + procedure Resume(); + + procedure Reset(); + procedure UpdateBeats(); + + (** + * current song time (in seconds) used as base-timer for lyrics etc. + *) + function GetCurrentTime(): real; + procedure SetCurrentTime(Time: real); + end; + + +const + FFTSize = 512; // size of FFT data (output: FFTSize/2 values) +type + TFFTData = array[0..(FFTSize div 2)-1] of Single; + +type + PPCMStereoSample = ^TPCMStereoSample; + TPCMStereoSample = array[0..1] of SmallInt; + TPCMData = array[0..511] of TPCMStereoSample; + +type + TStreamStatus = (ssStopped, ssPlaying, ssPaused); +const + StreamStatusStr: array[TStreamStatus] of string = + ('Stopped', 'Playing', 'Paused'); + +type + TAudioSampleFormat = ( + asfU8, asfS8, // unsigned/signed 8 bits + asfU16LSB, asfS16LSB, // unsigned/signed 16 bits (endianness: LSB) + asfU16MSB, asfS16MSB, // unsigned/signed 16 bits (endianness: MSB) + asfU16, asfS16, // unsigned/signed 16 bits (endianness: System) + asfS24, // signed 24 bits (endianness: System) + asfS32, // signed 32 bits (endianness: System) + asfFloat // float + ); + +const + // Size of one sample (one channel only) in bytes + AudioSampleSize: array[TAudioSampleFormat] of integer = ( + 1, 1, // asfU8, asfS8 + 2, 2, // asfU16LSB, asfS16LSB + 2, 2, // asfU16MSB, asfS16MSB + 2, 2, // asfU16, asfS16 + 3, // asfS24 + 4, // asfS32 + 4 // asfFloat + ); + +const + CHANNELMAP_LEFT = 1; + CHANNELMAP_RIGHT = 2; + CHANNELMAP_FRONT = CHANNELMAP_LEFT or CHANNELMAP_RIGHT; + +type + TAudioFormatInfo = class + private + fSampleRate : double; + fChannels : byte; + fFormat : TAudioSampleFormat; + fFrameSize : integer; + + procedure SetChannels(Channels: byte); + procedure SetFormat(Format: TAudioSampleFormat); + procedure UpdateFrameSize(); + function GetBytesPerSec(): double; + public + constructor Create(Channels: byte; SampleRate: double; Format: TAudioSampleFormat); + function Copy(): TAudioFormatInfo; + + (** + * Returns the inverse ratio of the size of data in this format to its + * size in a given target format. + * Example: SrcSize*SrcInfo.GetRatio(TgtInfo) = TgtSize + *) + function GetRatio(TargetInfo: TAudioFormatInfo): double; + + property SampleRate: double read fSampleRate write fSampleRate; + property Channels: byte read fChannels write SetChannels; + property Format: TAudioSampleFormat read fFormat write SetFormat; + property FrameSize: integer read fFrameSize; + property BytesPerSec: double read GetBytesPerSec; + end; + +type + TSoundEffect = class + public + EngineData: Pointer; // can be used for engine-specific data + procedure Callback(Buffer: PChar; BufSize: integer); virtual; abstract; + end; + + TVoiceRemoval = class(TSoundEffect) + public + procedure Callback(Buffer: PChar; BufSize: integer); override; + end; + +type + TSyncSource = class + function GetClock(): real; virtual; abstract; + end; + + TAudioProcessingStream = class; + TOnCloseHandler = procedure(Stream: TAudioProcessingStream); + + TAudioProcessingStream = class + protected + OnCloseHandlers: array of TOnCloseHandler; + + function GetLength(): real; virtual; abstract; + function GetPosition(): real; virtual; abstract; + procedure SetPosition(Time: real); virtual; abstract; + function GetLoop(): boolean; virtual; abstract; + procedure SetLoop(Enabled: boolean); virtual; abstract; + + procedure PerformOnClose(); + public + function GetAudioFormatInfo(): TAudioFormatInfo; virtual; abstract; + procedure Close(); virtual; abstract; + + (** + * Adds a new OnClose action handler. + * The handlers are performed in the order they were added. + * If not stated explicitely, member-variables might have been invalidated + * already. So do not use any member (variable/method/...) if you are not + * sure it is valid. + *) + procedure AddOnCloseHandler(Handler: TOnCloseHandler); + + property Length: real read GetLength; + property Position: real read GetPosition write SetPosition; + property Loop: boolean read GetLoop write SetLoop; + end; + + TAudioSourceStream = class(TAudioProcessingStream) + protected + function IsEOF(): boolean; virtual; abstract; + function IsError(): boolean; virtual; abstract; + public + function ReadData(Buffer: PChar; BufferSize: integer): integer; virtual; abstract; + + property EOF: boolean read IsEOF; + property Error: boolean read IsError; + end; + + (* + * State-Chart for playback-stream state transitions + * []: Transition, (): State + * + * /---[Play/FadeIn]--->-\ /-------[Pause]----->-\ + * -[Create]->(Stop) (Play) (Pause) + * \\-<-[Stop/EOF*/Error]-/ \-<---[Play/FadeIn]--// + * \-<------------[Stop/EOF*/Error]--------------/ + * + * *: if not looped, otherwise stream is repeated + * Note: SetPosition() does not change the state. + *) + + TAudioPlaybackStream = class(TAudioProcessingStream) + protected + SyncSource: TSyncSource; + AvgSyncDiff: double; + SourceStream: TAudioSourceStream; + + function GetLatency(): double; virtual; abstract; + function GetStatus(): TStreamStatus; virtual; abstract; + function GetVolume(): single; virtual; abstract; + procedure SetVolume(Volume: single); virtual; abstract; + function Synchronize(BufferSize: integer; FormatInfo: TAudioFormatInfo): integer; + procedure FillBufferWithFrame(Buffer: PChar; BufferSize: integer; Frame: PChar; FrameSize: integer); + public + (** + * Opens a SourceStream for playback. + * Note that the caller (not the TAudioPlaybackStream) is responsible to + * free the SourceStream after the Playback-Stream is closed. + * You may use an OnClose-handler to achieve this. GetSourceStream() + * guarantees to deliver this method's SourceStream parameter to + * the OnClose-handler. Freeing SourceStream at OnClose is allowed. + *) + function Open(SourceStream: TAudioSourceStream): boolean; virtual; abstract; + + procedure Play(); virtual; abstract; + procedure Pause(); virtual; abstract; + procedure Stop(); virtual; abstract; + procedure FadeIn(Time: real; TargetVolume: single); virtual; abstract; + + procedure GetFFTData(var data: TFFTData); virtual; abstract; + function GetPCMData(var data: TPCMData): Cardinal; virtual; abstract; + + procedure AddSoundEffect(Effect: TSoundEffect); virtual; abstract; + procedure RemoveSoundEffect(Effect: TSoundEffect); virtual; abstract; + + procedure SetSyncSource(SyncSource: TSyncSource); + function GetSourceStream(): TAudioSourceStream; + + property Status: TStreamStatus read GetStatus; + property Volume: single read GetVolume write SetVolume; + end; + + TAudioDecodeStream = class(TAudioSourceStream) + end; + + TAudioVoiceStream = class(TAudioSourceStream) + protected + FormatInfo: TAudioFormatInfo; + ChannelMap: integer; + public + destructor Destroy; override; + + function Open(ChannelMap: integer; FormatInfo: TAudioFormatInfo): boolean; virtual; + procedure Close(); override; + + procedure WriteData(Buffer: PChar; BufferSize: integer); virtual; abstract; + function GetAudioFormatInfo(): TAudioFormatInfo; override; + + function GetLength(): real; override; + function GetPosition(): real; override; + procedure SetPosition(Time: real); override; + function GetLoop(): boolean; override; + procedure SetLoop(Enabled: boolean); override; + end; + +type + // soundcard output-devices information + TAudioOutputDevice = class + public + Name: string; // soundcard name + end; + TAudioOutputDeviceList = array of TAudioOutputDevice; + +type + IGenericPlayback = Interface + ['{63A5EBC3-3F4D-4F23-8DFB-B5165FCE33DD}'] + function GetName: String; + + function Open(const Filename: string): boolean; // true if succeed + procedure Close; + + procedure Play; + procedure Pause; + procedure Stop; + + procedure SetPosition(Time: real); + function GetPosition: real; + + property Position: real read GetPosition write SetPosition; + end; + + IVideoPlayback = Interface( IGenericPlayback ) + ['{3574C40C-28AE-4201-B3D1-3D1F0759B131}'] + function Init(): boolean; + function Finalize: boolean; + + procedure GetFrame(Time: Extended); // WANT TO RENAME THESE TO BE MORE GENERIC + procedure DrawGL(Screen: integer); // WANT TO RENAME THESE TO BE MORE GENERIC + + end; + + IVideoVisualization = Interface( IVideoPlayback ) + ['{5AC17D60-B34D-478D-B632-EB00D4078017}'] + end; + + IAudioPlayback = Interface( IGenericPlayback ) + ['{E4AE0B40-3C21-4DC5-847C-20A87E0DFB96}'] + function InitializePlayback: boolean; + function FinalizePlayback: boolean; + + function GetOutputDeviceList(): TAudioOutputDeviceList; + + procedure SetAppVolume(Volume: single); + procedure SetVolume(Volume: single); + procedure SetLoop(Enabled: boolean); + + procedure FadeIn(Time: real; TargetVolume: single); + procedure SetSyncSource(SyncSource: TSyncSource); + + procedure Rewind; + function Finished: boolean; + function Length: real; + + // Sounds + // TODO: + // add a TMediaDummyPlaybackStream implementation that will + // be used by the TSoundLib whenever OpenSound() fails, so checking for + // nil-pointers is not neccessary anymore. + // PlaySound/StopSound will be removed then, OpenSound will be renamed to + // CreateSound. + 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(ChannelMap: integer; FormatInfo: TAudioFormatInfo): TAudioVoiceStream; + end; + + IGenericDecoder = Interface + ['{557B0E9A-604D-47E4-B826-13769F3E10B7}'] + function GetName(): String; + function InitializeDecoder(): boolean; + function FinalizeDecoder(): boolean; + //function IsSupported(const Filename: string): boolean; + end; + + (* + IVideoDecoder = Interface( IGenericDecoder ) + ['{2F184B2B-FE69-44D5-9031-0A2462391DCA}'] + function Open(const Filename: string): TVideoDecodeStream; + end; + *) + + IAudioDecoder = Interface( IGenericDecoder ) + ['{AB47B1B6-2AA9-4410-BF8C-EC79561B5478}'] + function Open(const Filename: string): TAudioDecodeStream; + end; + + IAudioInput = Interface + ['{A5C8DA92-2A0C-4AB2-849B-2F7448C6003A}'] + function GetName: String; + function InitializeRecord: boolean; + function FinalizeRecord(): boolean; + + procedure CaptureStart; + procedure CaptureStop; + end; + +type + TAudioConverter = class + protected + fSrcFormatInfo: TAudioFormatInfo; + fDstFormatInfo: TAudioFormatInfo; + public + function Init(SrcFormatInfo: TAudioFormatInfo; DstFormatInfo: TAudioFormatInfo): boolean; virtual; + destructor Destroy(); override; + + (** + * Converts the InputBuffer and stores the result in OutputBuffer. + * If the result is not -1, InputSize will be set to the actual number of + * input-buffer bytes used. + * Returns the number of bytes written to the output-buffer or -1 if an error occured. + *) + function Convert(InputBuffer: PChar; OutputBuffer: PChar; var InputSize: integer): integer; virtual; abstract; + + (** + * Destination/Source size ratio + *) + function GetRatio(): double; virtual; abstract; + + function GetOutputBufferSize(InputSize: integer): integer; virtual; abstract; + property SrcFormatInfo: TAudioFormatInfo read fSrcFormatInfo; + property DstFormatInfo: TAudioFormatInfo read fDstFormatInfo; + end; + +(* TODO +const + SOUNDID_START = 0; + SOUNDID_BACK = 1; + SOUNDID_SWOOSH = 2; + SOUNDID_CHANGE = 3; + SOUNDID_OPTION = 4; + SOUNDID_CLICK = 5; + LAST_SOUNDID = SOUNDID_CLICK; + + BaseSoundFilenames: array[0..LAST_SOUNDID] of string = ( + '%SOUNDPATH%/Common start.mp3', // Start + '%SOUNDPATH%/Common back.mp3', // Back + '%SOUNDPATH%/menu swoosh.mp3', // Swoosh + '%SOUNDPATH%/select music change music 50.mp3', // Change + '%SOUNDPATH%/option change col.mp3', // Option + '%SOUNDPATH%/rimshot022b.mp3' // Click + { + '%SOUNDPATH%/bassdrumhard076b.mp3', // Drum (unused) + '%SOUNDPATH%/hihatclosed068b.mp3', // Hihat (unused) + '%SOUNDPATH%/claps050b.mp3', // Clap (unused) + '%SOUNDPATH%/Shuffle.mp3' // Shuffle (unused) + } + ); +*) + +type + TSoundLibrary = class + private + // TODO + //Sounds: array of TAudioPlaybackStream; + public + // TODO: move sounds to the private section + // and provide IDs instead. + Start: TAudioPlaybackStream; + Back: TAudioPlaybackStream; + Swoosh: TAudioPlaybackStream; + Change: TAudioPlaybackStream; + Option: TAudioPlaybackStream; + Click: TAudioPlaybackStream; + BGMusic: TAudioPlaybackStream; + + constructor Create(); + destructor Destroy(); override; + + procedure LoadSounds(); + procedure UnloadSounds(); + + procedure StartBgMusic(); + procedure PauseBgMusic(); + // TODO + //function AddSound(Filename: string): integer; + //procedure RemoveSound(ID: integer); + //function GetSound(ID: integer): TAudioPlaybackStream; + //property Sound[ID: integer]: TAudioPlaybackStream read GetSound; default; + end; + +var + // TODO: JB --- THESE SHOULD NOT BE GLOBAL + Lines: array of TLines; + LyricsState: TLyricsState; + SoundLib: TSoundLibrary; + + +procedure InitializeSound; +procedure InitializeVideo; +procedure FinalizeMedia; + +function Visualization(): IVideoPlayback; +function VideoPlayback(): IVideoPlayback; +function AudioPlayback(): IAudioPlayback; +function AudioInput(): IAudioInput; +function AudioDecoders(): TInterfaceList; + +function MediaManager: TInterfaceList; + +procedure DumpMediaInterfaces(); + +implementation + +uses + sysutils, + math, + UIni, + UMain, + UCommandLine, + URecord, + ULog; + +var + DefaultVideoPlayback : IVideoPlayback; + DefaultVisualization : IVideoPlayback; + DefaultAudioPlayback : IAudioPlayback; + DefaultAudioInput : IAudioInput; + AudioDecoderList : TInterfaceList; + MediaInterfaceList : TInterfaceList; + + +constructor TAudioFormatInfo.Create(Channels: byte; SampleRate: double; Format: TAudioSampleFormat); +begin + inherited Create(); + fChannels := Channels; + fSampleRate := SampleRate; + fFormat := Format; + UpdateFrameSize(); +end; + +procedure TAudioFormatInfo.SetChannels(Channels: byte); +begin + fChannels := Channels; + UpdateFrameSize(); +end; + +procedure TAudioFormatInfo.SetFormat(Format: TAudioSampleFormat); +begin + fFormat := Format; + UpdateFrameSize(); +end; + +function TAudioFormatInfo.GetBytesPerSec(): double; +begin + Result := FrameSize * SampleRate; +end; + +procedure TAudioFormatInfo.UpdateFrameSize(); +begin + fFrameSize := AudioSampleSize[fFormat] * fChannels; +end; + +function TAudioFormatInfo.Copy(): TAudioFormatInfo; +begin + Result := TAudioFormatInfo.Create(Self.Channels, Self.SampleRate, Self.Format); +end; + +function TAudioFormatInfo.GetRatio(TargetInfo: TAudioFormatInfo): double; +begin + Result := (TargetInfo.FrameSize / Self.FrameSize) * + (TargetInfo.SampleRate / Self.SampleRate) +end; + + +function MediaManager: TInterfaceList; +begin + if (not assigned(MediaInterfaceList)) then + MediaInterfaceList := TInterfaceList.Create(); + Result := MediaInterfaceList; +end; + +function VideoPlayback(): IVideoPlayback; +begin + Result := DefaultVideoPlayback; +end; + +function Visualization(): IVideoPlayback; +begin + Result := DefaultVisualization; +end; + +function AudioPlayback(): IAudioPlayback; +begin + Result := DefaultAudioPlayback; +end; + +function AudioInput(): IAudioInput; +begin + Result := DefaultAudioInput; +end; + +function AudioDecoders(): TInterfaceList; +begin + Result := AudioDecoderList; +end; + +procedure FilterInterfaceList(const IID: TGUID; InList, OutList: TInterfaceList); +var + i: integer; + obj: IInterface; +begin + if (not assigned(OutList)) then + Exit; + + OutList.Clear; + for i := 0 to InList.Count-1 do + begin + if assigned(InList[i]) then + begin + // add object to list if it implements the interface searched for + if (InList[i].QueryInterface(IID, obj) = 0) then + OutList.Add(obj); + end; + end; +end; + +procedure InitializeSound; +var + i: integer; + InterfaceList: TInterfaceList; + CurrentAudioDecoder: IAudioDecoder; + CurrentAudioPlayback: IAudioPlayback; + CurrentAudioInput: IAudioInput; +begin + // create a temporary list for interface enumeration + InterfaceList := TInterfaceList.Create(); + + // initialize all audio-decoders first + FilterInterfaceList(IAudioDecoder, MediaManager, InterfaceList); + for i := 0 to InterfaceList.Count-1 do + begin + CurrentAudioDecoder := IAudioDecoder(InterfaceList[i]); + if (not CurrentAudioDecoder.InitializeDecoder()) then + begin + Log.LogError('Initialize failed, Removing - '+ CurrentAudioDecoder.GetName); + MediaManager.Remove(CurrentAudioDecoder); + end; + end; + + // create and setup decoder-list (see AudioDecoders()) + AudioDecoderList := TInterfaceList.Create; + FilterInterfaceList(IAudioDecoder, MediaManager, AudioDecoders); + + // find and initialize playback interface + DefaultAudioPlayback := nil; + FilterInterfaceList(IAudioPlayback, MediaManager, InterfaceList); + for i := 0 to InterfaceList.Count-1 do + begin + CurrentAudioPlayback := IAudioPlayback(InterfaceList[i]); + if (CurrentAudioPlayback.InitializePlayback()) then + begin + DefaultAudioPlayback := CurrentAudioPlayback; + break; + end; + Log.LogError('Initialize failed, Removing - '+ CurrentAudioPlayback.GetName); + MediaManager.Remove(CurrentAudioPlayback); + end; + + // find and initialize input interface + DefaultAudioInput := nil; + FilterInterfaceList(IAudioInput, MediaManager, InterfaceList); + for i := 0 to InterfaceList.Count-1 do + begin + CurrentAudioInput := IAudioInput(InterfaceList[i]); + if (CurrentAudioInput.InitializeRecord()) then + begin + DefaultAudioInput := CurrentAudioInput; + break; + end; + Log.LogError('Initialize failed, Removing - '+ CurrentAudioInput.GetName); + MediaManager.Remove(CurrentAudioInput); + end; + + InterfaceList.Free; + + // Update input-device list with registered devices + AudioInputProcessor.UpdateInputDeviceConfig(); + + // Load in-game sounds + SoundLib := TSoundLibrary.Create; +end; + +procedure InitializeVideo(); +var + i: integer; + InterfaceList: TInterfaceList; + VideoInterface: IVideoPlayback; + VisualInterface: IVideoVisualization; +begin + InterfaceList := TInterfaceList.Create; + + // initialize and set video-playback singleton + DefaultVideoPlayback := nil; + FilterInterfaceList(IVideoPlayback, MediaManager, InterfaceList); + for i := 0 to InterfaceList.Count-1 do + begin + VideoInterface := IVideoPlayback(InterfaceList[i]); + if (VideoInterface.Init()) then + begin + DefaultVideoPlayback := VideoInterface; + break; + end; + Log.LogError('Initialize failed, Removing - '+ VideoInterface.GetName); + MediaManager.Remove(VideoInterface); + end; + + // initialize and set visualization singleton + DefaultVisualization := nil; + FilterInterfaceList(IVideoVisualization, MediaManager, InterfaceList); + for i := 0 to InterfaceList.Count-1 do + begin + VisualInterface := IVideoVisualization(InterfaceList[i]); + if (VisualInterface.Init()) then + begin + DefaultVisualization := VisualInterface; + break; + end; + Log.LogError('Initialize failed, Removing - '+ VisualInterface.GetName); + MediaManager.Remove(VisualInterface); + end; + + InterfaceList.Free; + + // now that we have all interfaces, we can dump them + // TODO: move this to another place + if FindCmdLineSwitch( cMediaInterfaces ) then + begin + DumpMediaInterfaces(); + halt; + end; +end; + +procedure UnloadMediaModules; +var + i: integer; + InterfaceList: TInterfaceList; +begin + FreeAndNil(AudioDecoderList); + DefaultAudioPlayback := nil; + DefaultAudioInput := nil; + DefaultVideoPlayback := nil; + DefaultVisualization := nil; + + // create temporary interface list + InterfaceList := TInterfaceList.Create(); + + // finalize audio playback interfaces (should be done before the decoders) + FilterInterfaceList(IAudioPlayback, MediaManager, InterfaceList); + for i := 0 to InterfaceList.Count-1 do + IAudioPlayback(InterfaceList[i]).FinalizePlayback(); + + // finalize audio input interfaces + FilterInterfaceList(IAudioInput, MediaManager, InterfaceList); + for i := 0 to InterfaceList.Count-1 do + IAudioInput(InterfaceList[i]).FinalizeRecord(); + + // finalize audio decoder interfaces + FilterInterfaceList(IAudioDecoder, MediaManager, InterfaceList); + for i := 0 to InterfaceList.Count-1 do + IAudioDecoder(InterfaceList[i]).FinalizeDecoder(); + + // finalize video interfaces + FilterInterfaceList(IVideoPlayback, MediaManager, InterfaceList); + for i := 0 to InterfaceList.Count-1 do + IVideoPlayback(InterfaceList[i]).Finalize(); + + // finalize audio decoder interfaces + FilterInterfaceList(IVideoVisualization, MediaManager, InterfaceList); + for i := 0 to InterfaceList.Count-1 do + IVideoVisualization(InterfaceList[i]).Finalize(); + + InterfaceList.Free; + + // finally free interfaces (by removing all references to them) + FreeAndNil(MediaInterfaceList); +end; + +procedure FinalizeMedia; +begin + // stop, close and free sounds + SoundLib.Free; + + // stop and close music stream + if (AudioPlayback <> nil) then + AudioPlayback.Close; + + // stop any active captures + if (AudioInput <> nil) then + AudioInput.CaptureStop; + + if (VideoPlayback <> nil) then + VideoPlayback.Close; + + if (Visualization <> nil) then + Visualization.Close; + + UnloadMediaModules(); +end; + +procedure DumpMediaInterfaces(); +begin + writeln( '' ); + writeln( '--------------------------------------------------------------' ); + writeln( ' In-use Media Interfaces ' ); + writeln( '--------------------------------------------------------------' ); + writeln( 'Registered Audio Playback Interface : ' + AudioPlayback.GetName ); + writeln( 'Registered Audio Input Interface : ' + AudioInput.GetName ); + writeln( 'Registered Video Playback Interface : ' + VideoPlayback.GetName ); + writeln( 'Registered Visualization Interface : ' + Visualization.GetName ); + writeln( '--------------------------------------------------------------' ); + writeln( '' ); +end; + + +{ TSoundLibrary } + +constructor TSoundLibrary.Create(); +begin + inherited; + LoadSounds(); +end; + +destructor TSoundLibrary.Destroy(); +begin + UnloadSounds(); + inherited; +end; + +procedure TSoundLibrary.LoadSounds(); +begin + UnloadSounds(); + + Start := AudioPlayback.OpenSound(SoundPath + 'Common start.mp3'); + Back := AudioPlayback.OpenSound(SoundPath + 'Common back.mp3'); + Swoosh := AudioPlayback.OpenSound(SoundPath + 'menu swoosh.mp3'); + Change := AudioPlayback.OpenSound(SoundPath + 'select music change music 50.mp3'); + Option := AudioPlayback.OpenSound(SoundPath + 'option change col.mp3'); + Click := AudioPlayback.OpenSound(SoundPath + 'rimshot022b.mp3'); + + BGMusic := AudioPlayback.OpenSound(SoundPath + 'Bebeto_-_Loop010.mp3'); + + if (BGMusic <> nil) then + BGMusic.Loop := True; +end; + +procedure TSoundLibrary.UnloadSounds(); +begin + FreeAndNil(Start); + FreeAndNil(Back); + FreeAndNil(Swoosh); + FreeAndNil(Change); + FreeAndNil(Option); + FreeAndNil(Click); + FreeAndNil(BGMusic); +end; + +(* TODO +function TSoundLibrary.GetSound(ID: integer): TAudioPlaybackStream; +begin + if ((ID >= 0) and (ID < Length(Sounds))) then + Result := Sounds[ID] + else + Result := nil; +end; +*) + +procedure TSoundLibrary.StartBgMusic(); +begin + if (TBackgroundMusicOption(Ini.BackgroundMusicOption) = bmoOn) and + (Soundlib.BGMusic <> nil) and not (Soundlib.BGMusic.Status = ssPlaying) then + begin + AudioPlayback.PlaySound(Soundlib.BGMusic); + end; +end; + +procedure TSoundLibrary.PauseBgMusic(); +begin + If (Soundlib.BGMusic <> nil) then + begin + Soundlib.BGMusic.Pause; + end; +end; + +{ TVoiceRemoval } + +procedure TVoiceRemoval.Callback(Buffer: PChar; BufSize: integer); +var + FrameIndex, FrameSize: integer; + Value: integer; + Sample: PPCMStereoSample; +begin + FrameSize := 2 * SizeOf(SmallInt); + for FrameIndex := 0 to (BufSize div FrameSize)-1 do + begin + Sample := PPCMStereoSample(Buffer); + // channel difference + Value := Sample[0] - Sample[1]; + // clip + if (Value > High(SmallInt)) then + Value := High(SmallInt) + else if (Value < Low(SmallInt)) then + Value := Low(SmallInt); + // assign result + Sample[0] := Value; + Sample[1] := Value; + // increase to next frame + Inc(Buffer, FrameSize); + end; +end; + + +{ TVoiceRemoval } + +constructor TLyricsState.Create(); +begin + // create a triggered timer, so we can Pause() it, set the time + // and Resume() it afterwards for better synching. + Timer := TRelativeTimer.Create(true); + + // reset state + Reset(); +end; + +procedure TLyricsState.Pause(); +begin + Timer.Pause(); +end; + +procedure TLyricsState.Resume(); +begin + Timer.Resume(); +end; + +procedure TLyricsState.SetCurrentTime(Time: real); +begin + // do not start the timer (if not started already), + // after setting the current time + Timer.SetTime(Time, false); +end; + +function TLyricsState.GetCurrentTime(): real; +begin + Result := Timer.GetTime(); +end; + +(** + * Resets the timer and state of the lyrics. + * The timer will be stopped afterwards so you have to call Resume() + * to start the lyrics timer. + *) +procedure TLyricsState.Reset(); +begin + Pause(); + SetCurrentTime(0); + + StartTime := 0; + TotalTime := 0; + + OldBeat := -1; + MidBeat := -1; + CurrentBeat := -1; + + OldBeatC := -1; + MidBeatC := -1; + CurrentBeatC := -1; + + OldBeatD := -1; + MidBeatD := -1; + CurrentBeatD := -1; +end; + +(** + * Updates the beat information (CurrentBeat/MidBeat/...) according to the + * current lyric time. + *) +procedure TLyricsState.UpdateBeats(); +var + CurLyricsTime: real; +begin + CurLyricsTime := GetCurrentTime(); + + OldBeat := CurrentBeat; + MidBeat := GetMidBeat(CurLyricsTime - StartTime / 1000); + CurrentBeat := Floor(MidBeat); + + OldBeatC := CurrentBeatC; + MidBeatC := GetMidBeat(CurLyricsTime - StartTime / 1000); + CurrentBeatC := Floor(MidBeatC); + + OldBeatD := CurrentBeatD; + // MidBeatD = MidBeat with additional GAP + MidBeatD := -0.5 + GetMidBeat(CurLyricsTime - (StartTime + 120 + 20) / 1000); + CurrentBeatD := Floor(MidBeatD); +end; + + +{ TAudioConverter } + +function TAudioConverter.Init(SrcFormatInfo: TAudioFormatInfo; DstFormatInfo: TAudioFormatInfo): boolean; +begin + fSrcFormatInfo := SrcFormatInfo.Copy(); + fDstFormatInfo := DstFormatInfo.Copy(); + Result := true; +end; + +destructor TAudioConverter.Destroy(); +begin + FreeAndNil(fSrcFormatInfo); + FreeAndNil(fDstFormatInfo); +end; + + +{ TAudioProcessingStream } + +procedure TAudioProcessingStream.AddOnCloseHandler(Handler: TOnCloseHandler); +begin + if (@Handler <> nil) then + begin + SetLength(OnCloseHandlers, System.Length(OnCloseHandlers)+1); + OnCloseHandlers[High(OnCloseHandlers)] := @Handler; + end; +end; + +procedure TAudioProcessingStream.PerformOnClose(); +var i: integer; +begin + for i := 0 to High(OnCloseHandlers) do + begin + OnCloseHandlers[i](Self); + end; +end; + + +{ TAudioPlaybackStream } + +function TAudioPlaybackStream.GetSourceStream(): TAudioSourceStream; +begin + Result := SourceStream; +end; + +procedure TAudioPlaybackStream.SetSyncSource(SyncSource: TSyncSource); +begin + Self.SyncSource := SyncSource; + AvgSyncDiff := -1; +end; + +(* + * Results an adjusted size of the input buffer size to keep the stream in sync + * with the SyncSource. If no SyncSource was assigned to this stream, the + * input buffer size will be returned, so this method will have no effect. + * + * These are the possible cases: + * - Result > BufferSize: stream is behind the sync-source (stream is too slow), + * (Result-BufferSize) bytes of the buffer must be skipped. + * - Result = BufferSize: stream is in sync, + * there is nothing to do. + * - Result < BufferSize: stream is ahead of the sync-source (stream is too fast), + * (BufferSize-Result) bytes of the buffer must be padded. + *) +function TAudioPlaybackStream.Synchronize(BufferSize: integer; FormatInfo: TAudioFormatInfo): integer; +var + TimeDiff: double; + TimeCorrectionFactor: double; +const + AVG_HISTORY_FACTOR = 0.9; + SYNC_THRESHOLD = 0.045; + MAX_SYNC_DIFF_TIME = 0.002; +begin + Result := BufferSize; + + if (not assigned(SyncSource)) then + Exit; + + if (BufferSize <= 0) then + Exit; + + // difference between sync-source and stream position + // (negative if the music-stream's position is ahead of the master clock) + TimeDiff := SyncSource.GetClock() - (Position - GetLatency()); + + // calculate average time difference (some sort of weighted mean). + // The bigger AVG_HISTORY_FACTOR is, the smoother is the average diff. + // This means that older diffs are weighted more with a higher history factor + // than with a lower. Do not use a too low history factor. FFmpeg produces + // very instable timestamps (pts) for ogg due to some bugs. They may differ + // +-50ms from the real stream position. Without filtering those glitches we + // would synch without any need, resulting in ugly plopping sounds. + if (AvgSyncDiff = -1) then + AvgSyncDiff := TimeDiff + else + AvgSyncDiff := TimeDiff * (1-AVG_HISTORY_FACTOR) + + AvgSyncDiff * AVG_HISTORY_FACTOR; + + // check if sync needed + if (Abs(AvgSyncDiff) >= SYNC_THRESHOLD) then + begin + // TODO: use SetPosition if diff is too large (>5s) + if (TimeDiff < 1) then + TimeCorrectionFactor := Sign(TimeDiff)*TimeDiff*TimeDiff + else + TimeCorrectionFactor := TimeDiff; + + // calculate adapted buffer size + // reduce size of data to fetch if music is ahead, increase otherwise + Result := BufferSize + Round(TimeCorrectionFactor * FormatInfo.SampleRate) * FormatInfo.FrameSize; + if (Result < 0) then + Result := 0; + + // reset average + AvgSyncDiff := -1; + end; + + (* + DebugWriteln('Diff: ' + floattostrf(TimeDiff, ffFixed, 15, 3) + + '| SyS: ' + floattostrf(SyncSource.GetClock(), ffFixed, 15, 3) + + '| Pos: ' + floattostrf(Position, ffFixed, 15, 3) + + '| Avg: ' + floattostrf(AvgSyncDiff, ffFixed, 15, 3)); + *) +end; + +(* + * Fills a buffer with copies of the given frame or with 0 if frame. + *) +procedure TAudioPlaybackStream.FillBufferWithFrame(Buffer: PChar; BufferSize: integer; Frame: PChar; FrameSize: integer); +var + i: integer; + FrameCopyCount: integer; +begin + // the buffer must at least contain place for one copy of the frame. + if ((Buffer = nil) or (BufferSize <= 0) or (BufferSize < FrameSize)) then + Exit; + + // no valid frame -> fill with 0 + if ((Frame = nil) or (FrameSize <= 0)) then + begin + FillChar(Buffer[0], BufferSize, 0); + Exit; + end; + + // number of frames to copy + FrameCopyCount := BufferSize div FrameSize; + // insert as many copies of frame into the buffer as possible + for i := 0 to FrameCopyCount-1 do + Move(Frame[0], Buffer[i*FrameSize], FrameSize); +end; + +{ TAudioVoiceStream } + +function TAudioVoiceStream.Open(ChannelMap: integer; FormatInfo: TAudioFormatInfo): boolean; +begin + Self.ChannelMap := ChannelMap; + Self.FormatInfo := FormatInfo.Copy(); + // a voice stream is always mono, reassure the the format is correct + Self.FormatInfo.Channels := 1; + Result := true; +end; + +destructor TAudioVoiceStream.Destroy; +begin + Close(); + inherited; +end; + +procedure TAudioVoiceStream.Close(); +begin + PerformOnClose(); + FreeAndNil(FormatInfo); +end; + +function TAudioVoiceStream.GetAudioFormatInfo(): TAudioFormatInfo; +begin + Result := FormatInfo; +end; + +function TAudioVoiceStream.GetLength(): real; +begin + Result := -1; +end; + +function TAudioVoiceStream.GetPosition(): real; +begin + Result := -1; +end; + +procedure TAudioVoiceStream.SetPosition(Time: real); +begin +end; + +function TAudioVoiceStream.GetLoop(): boolean; +begin + Result := false; +end; + +procedure TAudioVoiceStream.SetLoop(Enabled: boolean); +begin +end; + + +end. |