Moved: The folder classes has been renamed to base

Updated: ultrastardx.dpr has been changed accordingly 

git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@1339 b956fd51-792f-4845-bead-9b4dfca2ff2c

1 files changed, 1107 insertions, 0 deletions

diff --git a/src/base/UMain.pas b/src/base/UMain.pas
new file mode 100644
index 00000000..5dacd5f8
--- /dev/null
+++ b/src/base/UMain.pas
@@ -0,0 +1,1107 @@
+unit UMain;
+
+interface
+
+{$IFDEF FPC}
+  {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses
+  SysUtils,
+  Classes,
+  SDL,
+  UMusic,
+  URecord,
+  UTime,
+  UDisplay,
+  UIni,
+  ULog,
+  ULyrics,
+  UScreenSing,
+  USong,
+  gl;
+
+type
+  PPLayerNote = ^TPlayerNote;
+  TPlayerNote = record
+    Start:     integer;
+    Length:    integer;
+    Detect:    real;    // accurate place, detected in the note
+    Tone:      real;
+    Perfect:   boolean; // true if the note matches the original one, lit the star
+    Hit:       boolean; // true if the note Hits the Line
+  end;
+
+  PPLayer = ^TPlayer;
+  TPlayer = record
+    Name:         string;
+
+    // Index in Teaminfo record
+    TeamID:       Byte;
+    PlayerID:     Byte;
+
+    // Scores
+    Score:        real;
+    ScoreLine:    real;
+    ScoreGolden:  real;
+
+    ScoreInt:       integer;
+    ScoreLineInt:   integer;
+    ScoreGoldenInt: integer;
+    ScoreTotalInt:  integer;
+
+    // LineBonus
+    ScoreLast:    Real;//Last Line Score
+
+    // PerfectLineTwinkle (effect)
+    LastSentencePerfect: Boolean;
+
+    HighNote:   integer; // index of last note (= High(Note)?)
+    LengthNote: integer; // number of notes (= Length(Note)?).
+    Note:       array of TPlayerNote;
+  end;
+
+
+var
+  // Absolute Paths
+  GamePath:         string;
+  SoundPath:        string;
+  SongPaths:        TStringList;
+  LogPath:          string;
+  ThemePath:        string;
+  SkinsPath:        string;
+  ScreenshotsPath:  string;
+  CoverPaths:       TStringList;
+  LanguagesPath:    string;
+  PluginPath:       string;
+  VisualsPath:      string;
+  ResourcesPath:    string;
+  PlayListPath:     string;
+
+  Done:     Boolean;
+  Event:    TSDL_event;
+  // FIXME: ConversionFileName should not be global
+  ConversionFileName: string;
+  Restart:  boolean;
+
+  // player and music info
+  Player:       array of TPlayer;
+  PlayersPlay:  integer;
+
+  CurrentSong : TSong;
+
+const
+  MAX_SONG_SCORE = 10000;     // max. achievable points per song
+  MAX_SONG_LINE_BONUS = 1000; // max. achievable line bonus per song
+
+function FindPath(out PathResult: string; const RequestedPath: string; NeedsWritePermission: boolean): boolean;
+procedure InitializePaths;
+procedure AddSongPath(const Path: string);
+
+Procedure Main;
+procedure MainLoop;
+procedure CheckEvents;
+procedure Sing(Screen: TScreenSing);
+procedure NewSentence(Screen: TScreenSing);
+procedure NewBeatClick(Screen: TScreenSing); // executed when on then new beat for click
+procedure NewBeatDetect(Screen: TScreenSing); // executed when on then new beat for detection
+procedure NewNote(Screen: TScreenSing); // detect note
+function  GetMidBeat(Time: real): real;
+function  GetTimeFromBeat(Beat: integer): real;
+procedure ClearScores(PlayerNum: integer);
+
+implementation
+
+uses
+  Math,
+  StrUtils,
+  USongs,
+  UJoystick,
+  UCommandLine,
+  ULanguage,
+  //SDL_ttf,
+  USkins,
+  UCovers,
+  UCatCovers,
+  UDataBase,
+  UPlaylist,
+  UDLLManager,
+  UParty,
+  UConfig,
+  UCore,
+  UCommon,
+  UGraphic,
+  UGraphicClasses,
+  UPluginDefs,
+  UPlatform,
+  UThemes;
+
+
+
+
+procedure Main;
+var
+  WndTitle: string;
+begin
+  try
+    WndTitle := USDXVersionStr;
+
+    Platform.Init;
+
+    if Platform.TerminateIfAlreadyRunning(WndTitle) then
+      Exit;
+      
+    // fix floating-point exceptions (FPE)
+    DisableFloatingPointExceptions();
+    // fix the locale for string-to-float parsing in C-libs
+    SetDefaultNumericLocale();
+
+    // setup separators for parsing
+    // Note: ThousandSeparator must be set because of a bug in TIniFile.ReadFloat
+    ThousandSeparator := ',';
+    DecimalSeparator := '.';
+
+    //------------------------------
+    //StartUp - Create Classes and Load Files
+    //------------------------------
+
+    // Initialize SDL
+    // Without SDL_INIT_TIMER SDL_GetTicks() might return strange values
+    SDL_Init(SDL_INIT_VIDEO or SDL_INIT_TIMER);
+    SDL_EnableUnicode(1);
+
+    USTime := TTime.Create;
+    VideoBGTimer := TRelativeTimer.Create;
+
+    // Commandline Parameter Parser
+    Params := TCMDParams.Create;
+
+    // Log + Benchmark
+    Log := TLog.Create;
+    Log.Title := WndTitle;
+    Log.FileOutputEnabled := not Params.NoLog;
+    Log.BenchmarkStart(0);
+
+    // Language
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Initialize Paths', 'Initialization');
+    InitializePaths;
+    Log.LogStatus('Load Language', 'Initialization');
+    Language := TLanguage.Create;
+
+    // Add Const Values:
+    Language.AddConst('US_VERSION', USDXVersionStr);
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading Language', 1);
+
+    {
+    // SDL_ttf (Not used yet, maybe in version 1.5)
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Initialize SDL_ttf', 'Initialization');
+    TTF_Init();
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Initializing SDL_ttf', 1);
+    }
+
+    // Skin
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Loading Skin List', 'Initialization');
+    Skin := TSkin.Create;
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading Skin List', 1);
+
+    // Ini + Paths
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Load Ini', 'Initialization');
+    Ini := TIni.Create;
+    Ini.Load;
+
+    //it's possible that this is the first run, create a .ini file if neccessary
+    Log.LogStatus('Write Ini', 'Initialization');
+    Ini.Save;
+
+    // Load Languagefile
+    if (Params.Language <> -1) then
+      Language.ChangeLanguage(ILanguage[Params.Language])
+    else
+      Language.ChangeLanguage(ILanguage[Ini.Language]);
+
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading Ini', 1);
+
+    // Sound
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Initialize Sound', 'Initialization');
+    InitializeSound();
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Initializing Sound', 1);
+
+    // Lyrics-engine with media reference timer
+    LyricsState := TLyricsState.Create();
+
+    // Theme
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Load Themes', 'Initialization');
+    Theme := TTheme.Create(ThemePath + ITheme[Ini.Theme] + '.ini', Ini.Color);
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading Themes', 1);
+
+    // Covers Cache
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Creating Covers Cache', 'Initialization');
+    Covers := TCoverDatabase.Create;
+    Log.LogBenchmark('Loading Covers Cache Array', 1);
+    Log.BenchmarkStart(1);
+
+    // Category Covers
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Creating Category Covers Array', 'Initialization');
+    CatCovers:= TCatCovers.Create;
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading Category Covers Array', 1);
+
+    // Songs
+    //Log.BenchmarkStart(1);
+    Log.LogStatus('Creating Song Array', 'Initialization');
+    Songs := TSongs.Create;
+    //Songs.LoadSongList;
+
+    Log.LogStatus('Creating 2nd Song Array', 'Initialization');
+    CatSongs := TCatSongs.Create;
+
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading Songs', 1);
+
+    // PluginManager
+    Log.BenchmarkStart(1);
+    Log.LogStatus('PluginManager', 'Initialization');
+    DLLMan := TDLLMan.Create;   // Load PluginList
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading PluginManager', 1);
+
+    {// Party Mode Manager
+    Log.BenchmarkStart(1);
+    Log.LogStatus('PartySession Manager', 'Initialization');
+    PartySession := TPartySession.Create;   //Load PartySession
+
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading PartySession Manager', 1);      }
+
+    // Graphics
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Initialize 3D', 'Initialization');
+    Initialize3D(WndTitle);
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Initializing 3D', 1);
+
+    // Score Saving System
+    Log.BenchmarkStart(1);
+    Log.LogStatus('DataBase System', 'Initialization');
+    DataBase := TDataBaseSystem.Create;
+
+    if (Params.ScoreFile = '') then
+      DataBase.Init (Platform.GetGameUserPath + 'Ultrastar.db')
+    else
+      DataBase.Init (Params.ScoreFile);
+
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading DataBase System', 1);
+
+    // Playlist Manager
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Playlist Manager', 'Initialization');
+    PlaylistMan := TPlaylistManager.Create;
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading Playlist Manager', 1);
+
+    // GoldenStarsTwinkleMod
+    Log.BenchmarkStart(1);
+    Log.LogStatus('Effect Manager', 'Initialization');
+    GoldenRec := TEffectManager.Create;
+    Log.BenchmarkEnd(1);
+    Log.LogBenchmark('Loading Particle System', 1);
+
+    // Joypad
+    if (Ini.Joypad = 1) OR (Params.Joypad) then
+    begin
+      Log.BenchmarkStart(1);
+      Log.LogStatus('Initialize Joystick', 'Initialization');
+      Joy := TJoy.Create;
+      Log.BenchmarkEnd(1);
+      Log.LogBenchmark('Initializing Joystick', 1);
+    end;
+
+    Log.BenchmarkEnd(0);
+    Log.LogBenchmark('Loading Time', 0);
+
+    Log.LogStatus('Creating Core', 'Initialization');
+    {Core := TCore.Create(
+      USDXShortVersionStr,
+      MakeVersion(USDX_VERSION_MAJOR,
+                  USDX_VERSION_MINOR,
+                  USDX_VERSION_RELEASE,
+                  chr(0))
+    );  }
+
+    Log.LogStatus('Running Core', 'Initialization');
+    //Core.Run;
+
+    //------------------------------
+    //Start- Mainloop
+    //------------------------------
+    Log.LogStatus('Main Loop', 'Initialization');
+    MainLoop;
+
+  finally
+    //------------------------------
+    //Finish Application
+    //------------------------------
+
+    // TODO:
+    // call an uninitialize routine for every initialize step
+    // or at least use the corresponding Free-Methods
+
+    FinalizeMedia();
+
+    //TTF_Quit();
+    SDL_Quit();
+
+    if assigned(Log) then
+    begin
+      Log.LogStatus('Main Loop', 'Finished');
+      Log.Free;
+    end;
+  end;
+end;
+
+procedure MainLoop;
+var
+  Delay:    integer;
+const
+  MAX_FPS = 100;
+begin
+  Delay := 0;
+  SDL_EnableKeyRepeat(125, 125);
+
+  CountSkipTime();  // JB - for some reason this seems to be needed when we use the SDL Timer functions.
+  while not Done do
+  begin
+    // joypad
+    if (Ini.Joypad = 1) or (Params.Joypad) then
+      Joy.Update;
+
+    // keyboard events
+    CheckEvents;
+
+    // display
+    done := not Display.Draw;
+    SwapBuffers;
+
+    // delay
+    CountMidTime;
+
+    Delay := Floor(1000 / MAX_FPS - 1000 * TimeMid);
+
+    if Delay >= 1 then
+      SDL_Delay(Delay); // dynamic, maximum is 100 fps
+
+    CountSkipTime;
+
+    // reinitialization of graphics
+    if Restart then
+    begin
+      Reinitialize3D;
+      Restart := false;
+    end;
+
+  end;
+End;
+
+procedure CheckEvents;
+begin
+  if Assigned(Display.NextScreen) then
+    Exit;
+    
+  while SDL_PollEvent( @event ) = 1 do
+  begin
+    case Event.type_ of
+      SDL_QUITEV:
+      begin
+        Display.Fade := 0;
+        Display.NextScreenWithCheck := nil;
+        Display.CheckOK := True;
+      end;
+      {
+      SDL_MOUSEBUTTONDOWN:
+        with Event.button Do
+        begin
+          if State = SDL_BUTTON_LEFT Then
+          begin
+            //
+          end;
+        end;
+      }
+      SDL_VIDEORESIZE:
+      begin
+        ScreenW := Event.resize.w;
+        ScreenH := Event.resize.h;
+        // Note: do NOT call SDL_SetVideoMode on Windows and MacOSX here.
+        // This would create a new OpenGL render-context and all texture data
+        // would be invalidated.
+        // On Linux the mode MUST be resetted, otherwise graphics will be corrupted.
+        {$IFDEF LINUX}
+        if boolean( Ini.FullScreen ) then
+          SDL_SetVideoMode(ScreenW, ScreenH, (Ini.Depth+1) * 16, SDL_OPENGL or SDL_FULLSCREEN)
+        else
+          SDL_SetVideoMode(ScreenW, ScreenH, (Ini.Depth+1) * 16, SDL_OPENGL or SDL_RESIZABLE);
+        {$ENDIF}
+      end;
+      SDL_KEYDOWN:
+        begin
+          // remap the "keypad enter" key to the "standard enter" key
+          if (Event.key.keysym.sym = SDLK_KP_ENTER) then
+            Event.key.keysym.sym := SDLK_RETURN;
+
+          if (Event.key.keysym.sym = SDLK_F11) or
+             ((Event.key.keysym.sym = SDLK_RETURN) and
+              ((Event.key.keysym.modifier and KMOD_ALT) <> 0)) then // toggle full screen
+          begin
+            Ini.FullScreen := integer( not boolean( Ini.FullScreen ) );
+
+            // FIXME: SDL_SetVideoMode creates a new OpenGL RC so we have to
+            // reload all texture data (-> whitescreen bug).
+            // Only Linux is able to handle screen-switching this way.
+            {$IFDEF LINUX}
+            if boolean( Ini.FullScreen ) then
+            begin
+              SDL_SetVideoMode(ScreenW, ScreenH, (Ini.Depth+1) * 16, SDL_OPENGL or SDL_FULLSCREEN);
+              SDL_ShowCursor(0);
+            end
+            else
+            begin
+              SDL_SetVideoMode(ScreenW, ScreenH, (Ini.Depth+1) * 16, SDL_OPENGL or SDL_RESIZABLE);
+              SDL_ShowCursor(1);
+            end;
+
+            glViewPort(0, 0, ScreenW, ScreenH);
+            {$ENDIF}
+          end
+          // if print is pressed -> make screenshot and save to screenshot path
+          else if (Event.key.keysym.sym = SDLK_SYSREQ) or (Event.key.keysym.sym = SDLK_PRINT) then
+            Display.SaveScreenShot
+          // if there is a visible popup then let it handle input instead of underlying screen
+          // shoud be done in a way to be sure the topmost popup has preference (maybe error, then check)
+          else if (ScreenPopupError <> nil) and (ScreenPopupError.Visible) then
+            done := not ScreenPopupError.ParseInput(Event.key.keysym.sym, WideChar(Event.key.keysym.unicode), True)
+          else if (ScreenPopupCheck <> nil) and (ScreenPopupCheck.Visible) then
+            done := not ScreenPopupCheck.ParseInput(Event.key.keysym.sym, WideChar(Event.key.keysym.unicode), True)
+          else
+          begin
+            // check if screen wants to exit
+            done := not Display.CurrentScreen^.ParseInput(Event.key.keysym.sym, WideChar(Event.key.keysym.unicode), True);
+
+            // if screen wants to exit
+            if done then
+            begin
+              // if question option is enabled then show exit popup
+              if (Ini.AskbeforeDel = 1) then
+              begin
+                Display.CurrentScreen^.CheckFadeTo(nil,'MSG_QUIT_USDX');
+              end
+              else // if ask-for-exit is disabled then simply exit
+              begin
+                Display.Fade := 0;
+                Display.NextScreenWithCheck := nil;
+                Display.CheckOK := True;
+              end;
+            end;
+
+          end;
+        end;
+      SDL_JOYAXISMOTION:
+        begin
+          // not implemented
+        end;
+      SDL_JOYBUTTONDOWN:
+        begin
+          // not implemented
+        end;
+    end; // case
+  end; // while
+end;
+
+function GetTimeForBeats(BPM, Beats: real): real;
+begin
+  Result := 60 / BPM * Beats;
+end;
+
+function GetBeats(BPM, msTime: real): real;
+begin
+  Result := BPM * msTime / 60;
+end;
+
+procedure GetMidBeatSub(BPMNum: integer; var Time: real; var CurBeat: real);
+var
+  NewTime:  real;
+begin
+  if High(CurrentSong.BPM) = BPMNum then
+  begin
+    // last BPM
+    CurBeat := CurrentSong.BPM[BPMNum].StartBeat + GetBeats(CurrentSong.BPM[BPMNum].BPM, Time);
+    Time := 0;
+  end
+  else
+  begin
+    // not last BPM
+    // count how much time is it for start of the new BPM and store it in NewTime
+    NewTime := GetTimeForBeats(CurrentSong.BPM[BPMNum].BPM, CurrentSong.BPM[BPMNum+1].StartBeat - CurrentSong.BPM[BPMNum].StartBeat);
+
+    // compare it to remaining time
+    if (Time - NewTime) > 0 then
+    begin
+      // there is still remaining time
+      CurBeat := CurrentSong.BPM[BPMNum].StartBeat;
+      Time := Time - NewTime;
+    end
+    else
+    begin
+      // there is no remaining time
+      CurBeat := CurrentSong.BPM[BPMNum].StartBeat + GetBeats(CurrentSong.BPM[BPMNum].BPM, Time);
+      Time := 0;
+    end; // if
+  end; // if
+end;
+
+function GetMidBeat(Time: real): real;
+var
+  CurBeat:  real;
+  CurBPM:   integer;
+begin
+  // static BPM
+  if Length(CurrentSong.BPM) = 1 then
+  begin
+    Result := Time * CurrentSong.BPM[0].BPM / 60;
+  end
+  // variable BPM
+  else if Length(CurrentSong.BPM) > 1 then
+  begin
+    CurBeat := 0;
+    CurBPM := 0;
+    while (Time > 0) do
+    begin
+      GetMidBeatSub(CurBPM, Time, CurBeat);
+      Inc(CurBPM);
+    end;
+
+    Result := CurBeat;
+  end
+  // invalid BPM
+  else
+  begin
+    Result := 0;
+  end;
+end;
+
+function GetTimeFromBeat(Beat: integer): real;
+var
+  CurBPM:   integer;
+begin
+  // static BPM
+  if Length(CurrentSong.BPM) = 1 then
+  begin
+    Result := CurrentSong.GAP / 1000 + Beat * 60 / CurrentSong.BPM[0].BPM;
+  end
+  // variable BPM
+  else if Length(CurrentSong.BPM) > 1 then
+  begin
+    Result := CurrentSong.GAP / 1000;
+    CurBPM := 0;
+    while (CurBPM <= High(CurrentSong.BPM)) and
+          (Beat > CurrentSong.BPM[CurBPM].StartBeat) do
+    begin
+      if (CurBPM < High(CurrentSong.BPM)) and
+         (Beat >= CurrentSong.BPM[CurBPM+1].StartBeat) then
+      begin
+        // full range
+        Result := Result + (60 / CurrentSong.BPM[CurBPM].BPM) *
+                           (CurrentSong.BPM[CurBPM+1].StartBeat - CurrentSong.BPM[CurBPM].StartBeat);
+      end;
+
+      if (CurBPM = High(CurrentSong.BPM)) or
+         (Beat < CurrentSong.BPM[CurBPM+1].StartBeat) then
+      begin
+        // in the middle
+        Result := Result + (60 / CurrentSong.BPM[CurBPM].BPM) *
+                           (Beat - CurrentSong.BPM[CurBPM].StartBeat);
+      end;
+      Inc(CurBPM);
+    end;
+
+    {
+    while (Time > 0) do
+    begin
+      GetMidBeatSub(CurBPM, Time, CurBeat);
+      Inc(CurBPM);
+    end;
+    }
+  end
+  // invalid BPM
+  else
+  begin
+    Result := 0;
+  end;
+end;
+
+procedure Sing(Screen: TScreenSing);
+var
+  Count:    integer;
+  CountGr:  integer;
+  CP:       integer;
+  Done:     real;
+  N:        integer;
+  CurLine:  PLine;
+  CurNote:  PLineFragment;
+begin
+  LyricsState.UpdateBeats();
+
+  // sentences routines
+  for CountGr := 0 to 0 do //High(Lines)
+  begin;
+    CP := CountGr;
+    // old parts
+    LyricsState.OldLine := Lines[CP].Current;
+
+    // choose current parts
+    for Count := 0 to Lines[CP].High do
+    begin
+      if LyricsState.CurrentBeat >= Lines[CP].Line[Count].Start then
+        Lines[CP].Current := Count;
+    end;
+
+    // clean player note if there is a new line 
+    // (optimization on halfbeat time)
+    if Lines[CP].Current <> LyricsState.OldLine then
+      NewSentence(Screen);
+
+  end; // for CountGr
+
+  // make some operations on clicks
+  if {(LyricsState.CurrentBeatC >= 0) and }(LyricsState.OldBeatC <> LyricsState.CurrentBeatC) then
+    NewBeatClick(Screen);
+
+  // make some operations when detecting new voice pitch
+  if (LyricsState.CurrentBeatD >= 0) and (LyricsState.OldBeatD <> LyricsState.CurrentBeatD) then
+    NewBeatDetect(Screen);
+
+  CurLine := @Lines[0].Line[Lines[0].Current];
+
+  // remove moving text
+  Done := 1;
+  for N := 0 to CurLine.HighNote do
+  begin
+    CurNote := @CurLine.Note[N];
+    if (CurNote.Start <= LyricsState.MidBeat) and
+       (CurNote.Start + CurNote.Length >= LyricsState.MidBeat) then
+    begin
+      Done := (LyricsState.MidBeat - CurNote.Start) / CurNote.Length;
+    end;
+  end;
+end;
+
+procedure NewSentence(Screen: TScreenSing);
+var
+  i: Integer;
+begin
+  // clean note of player
+  for i := 0 to High(Player) do
+  begin
+    Player[i].LengthNote := 0;
+    Player[i].HighNote := -1;
+    SetLength(Player[i].Note, 0);
+  end;
+
+  // on sentence change...
+  Screen.onSentenceChange(Lines[0].Current);
+end;
+
+procedure NewBeatClick;
+var
+  Count:    integer;
+begin
+  // beat click
+  if ((Ini.BeatClick = 1) and
+      ((LyricsState.CurrentBeatC + Lines[0].Resolution + Lines[0].NotesGAP) mod Lines[0].Resolution = 0)) then
+  begin
+    AudioPlayback.PlaySound(SoundLib.Click);
+  end;
+
+  for Count := 0 to Lines[0].Line[Lines[0].Current].HighNote do
+  begin
+    if (Lines[0].Line[Lines[0].Current].Note[Count].Start = LyricsState.CurrentBeatC) then
+    begin
+      // click assist
+      if Ini.ClickAssist = 1 then
+        AudioPlayback.PlaySound(SoundLib.Click);
+
+      // drum machine
+      (*
+      TempBeat := LyricsState.CurrentBeat;// + 2;
+      if (TempBeat mod 8 = 0) then Music.PlayDrum;
+      if (TempBeat mod 8 = 4) then Music.PlayClap;
+      //if (TempBeat mod 4 = 2) then Music.PlayHihat;
+      if (TempBeat mod 4 <> 0) then Music.PlayHihat;
+      *)
+    end;
+  end;
+end;
+
+procedure NewBeatDetect(Screen: TScreenSing);
+begin
+  NewNote(Screen);
+end;
+
+procedure NewNote(Screen: TScreenSing);
+var
+  LineFragmentIndex: integer;
+  CurrentLineFragment: PLineFragment;
+  PlayerIndex: integer;
+  CurrentSound: TCaptureBuffer;
+  CurrentPlayer: PPlayer;
+  LastPlayerNote: PPLayerNote;
+  Line: PLine;
+  SentenceIndex: integer;
+  SentenceMin: integer;
+  SentenceMax: integer;
+  SentenceDetected: integer; // sentence of detected note
+  NoteAvailable: boolean;
+  NewNote: boolean;
+  Range: integer;
+  NoteHit: boolean;
+  MaxSongPoints: integer; // max. points for the song (without line bonus)
+  MaxLinePoints: Real;    // max. points for the current line
+begin
+  // TODO: add duet mode support
+  // use Lines[LineSetIndex] with LineSetIndex depending on the current player
+
+  // count min and max sentence range for checking (detection is delayed to the notes we see on the screen)
+  SentenceMin := Lines[0].Current-1;
+  if (SentenceMin < 0) then
+    SentenceMin := 0;
+  SentenceMax := Lines[0].Current;
+
+  // check for an active note at the current time defined in the lyrics
+  NoteAvailable := false;
+  SentenceDetected := SentenceMin;
+  for SentenceIndex := SentenceMin to SentenceMax do
+  begin
+    Line := @Lines[0].Line[SentenceIndex];
+    for LineFragmentIndex := 0 to Line.HighNote do
+    begin
+      CurrentLineFragment := @Line.Note[LineFragmentIndex];
+      // check if line is active
+      if ((CurrentLineFragment.Start <= LyricsState.CurrentBeatD) and
+          (CurrentLineFragment.Start + CurrentLineFragment.Length-1 >= LyricsState.CurrentBeatD)) and
+         (CurrentLineFragment.NoteType <> ntFreestyle) and // but ignore FreeStyle notes
+         (CurrentLineFragment.Length > 0) then // and make sure the note lengths is at least 1
+      begin
+        SentenceDetected := SentenceIndex;
+        NoteAvailable := true;
+        Break;
+      end;
+    end;
+    // TODO: break here, if NoteAvailable is true? We would then use the first instead
+    // of the last note matching the current beat if notes overlap. But notes
+    // should not overlap at all.
+    //if (NoteAvailable) then
+    //  Break;
+  end;
+
+  // analyze player signals
+  for PlayerIndex := 0 to PlayersPlay-1 do
+  begin
+    CurrentPlayer := @Player[PlayerIndex];
+    CurrentSound := AudioInputProcessor.Sound[PlayerIndex];
+    LastPlayerNote := @CurrentPlayer.Note[CurrentPlayer.HighNote];
+
+    // analyze buffer
+    CurrentSound.AnalyzeBuffer;
+
+    // add some noise
+    // TODO: do we need this?
+    //LyricsState.Tone := LyricsState.Tone + Round(Random(3)) - 1;
+
+    // add note if possible
+    if (CurrentSound.ToneValid and NoteAvailable) then
+    begin
+      Line := @Lines[0].Line[SentenceDetected];
+      
+      // process until last note
+      for LineFragmentIndex := 0 to Line.HighNote do
+      begin
+        CurrentLineFragment := @Line.Note[LineFragmentIndex];
+        if (CurrentLineFragment.Start <= LyricsState.OldBeatD+1) and
+           (CurrentLineFragment.Start + CurrentLineFragment.Length > LyricsState.OldBeatD+1) then
+        begin
+          // compare notes (from song-file and from player)
+
+          // move players tone to proper octave
+          while (CurrentSound.Tone - CurrentLineFragment.Tone > 6) do
+            CurrentSound.Tone := CurrentSound.Tone - 12;
+
+          while (CurrentSound.Tone - CurrentLineFragment.Tone < -6) do
+            CurrentSound.Tone := CurrentSound.Tone + 12;
+
+          // half size notes patch
+          NoteHit := false;
+
+          //if Ini.Difficulty = 0 then Range := 2;
+          //if Ini.Difficulty = 1 then Range := 1;
+          //if Ini.Difficulty = 2 then Range := 0;
+          Range := 2 - Ini.Difficulty;
+
+          // check if the player hit the correct tone within the tolerated range
+          if (Abs(CurrentLineFragment.Tone - CurrentSound.Tone) <= Range) then
+          begin
+            // adjust the players tone to the correct one
+            // TODO: do we need to do this?
+            CurrentSound.Tone := CurrentLineFragment.Tone;
+
+            // half size notes patch
+            NoteHit := true;
+
+            if (Ini.LineBonus > 0) then
+              MaxSongPoints := MAX_SONG_SCORE - MAX_SONG_LINE_BONUS
+            else
+              MaxSongPoints := MAX_SONG_SCORE;
+
+            // Note: ScoreValue is the sum of all note values of the song
+            MaxLinePoints := MaxSongPoints / Lines[0].ScoreValue;
+
+            // FIXME: is this correct? Why do we add the points for a whole line
+            // if just one note is correct?
+            case CurrentLineFragment.NoteType of
+              ntNormal:  CurrentPlayer.Score := CurrentPlayer.Score + MaxLinePoints;
+              ntGolden:  CurrentPlayer.ScoreGolden := CurrentPlayer.ScoreGolden + MaxLinePoints;
+            end;
+
+            CurrentPlayer.ScoreInt := Floor(CurrentPlayer.Score / 10) * 10;
+            CurrentPlayer.ScoreGoldenInt := Floor(CurrentPlayer.ScoreGolden / 10) * 10;
+
+            CurrentPlayer.ScoreTotalInt := CurrentPlayer.ScoreInt +
+                                           CurrentPlayer.ScoreGoldenInt +
+                                           CurrentPlayer.ScoreLineInt;
+          end;
+
+        end; // operation
+      end; // for
+
+      // check if we have to add a new note or extend the note's length
+      if (SentenceDetected = SentenceMax) then
+      begin
+        // we will add a new note
+        NewNote := true;
+        // if last has the same tone
+        if ((CurrentPlayer.LengthNote > 0) and
+            (LastPlayerNote.Tone = CurrentSound.Tone) and
+            ((LastPlayerNote.Start + LastPlayerNote.Length) = LyricsState.CurrentBeatD)) then
+        begin
+          NewNote := false;
+        end;
+
+        // if is not as new note to control
+        for LineFragmentIndex := 0 to Line.HighNote do
+        begin
+          if (Line.Note[LineFragmentIndex].Start = LyricsState.CurrentBeatD) then
+            NewNote := true;
+        end;
+
+        // add new note
+        if NewNote then
+        begin
+          // new note
+          Inc(CurrentPlayer.LengthNote);
+          Inc(CurrentPlayer.HighNote);
+          SetLength(CurrentPlayer.Note, CurrentPlayer.LengthNote);
+
+          // update player's last note
+          LastPlayerNote := @CurrentPlayer.Note[CurrentPlayer.HighNote];
+          with LastPlayerNote^ do
+          begin
+            Start  := LyricsState.CurrentBeatD;
+            Length := 1;
+            Tone   := CurrentSound.Tone; // Tone || ToneAbs
+            Detect := LyricsState.MidBeat;
+            Hit    := NoteHit; // half note patch
+          end;
+        end
+        else
+        begin
+          // extend note length
+          Inc(LastPlayerNote.Length);
+        end;
+
+        // check for perfect note and then lit the star (on Draw)
+        for LineFragmentIndex := 0 to Line.HighNote do
+        begin
+          CurrentLineFragment := @Line.Note[LineFragmentIndex];
+          if (CurrentLineFragment.Start = LastPlayerNote.Start) and
+             (CurrentLineFragment.Length = LastPlayerNote.Length) and
+             (CurrentLineFragment.Tone = LastPlayerNote.Tone) then
+          begin
+            LastPlayerNote.Perfect := true;
+          end;
+        end;
+      end; // if SentenceDetected = SentenceMax
+
+    end; // if Detected
+  end; // for PlayerIndex
+
+  //Log.LogStatus('EndBeat', 'NewBeat');
+
+  // on sentence end -> for LineBonus and display of SingBar (rating pop-up)
+  if (SentenceDetected >= Low(Lines[0].Line)) and
+     (SentenceDetected <= High(Lines[0].Line)) then
+  begin
+    Line := @Lines[0].Line[SentenceDetected];
+    CurrentLineFragment := @Line.Note[Line.HighNote];
+    if ((CurrentLineFragment.Start + CurrentLineFragment.Length - 1) = LyricsState.CurrentBeatD) then
+    begin
+      if assigned(Screen) then
+        Screen.OnSentenceEnd(SentenceDetected);
+    end;
+  end;
+
+end;
+
+procedure ClearScores(PlayerNum: integer);
+begin
+  with Player[PlayerNum] do
+  begin
+    Score := 0;
+    ScoreInt := 0;
+    ScoreLine := 0;
+    ScoreLineInt := 0;
+    ScoreGolden := 0;
+    ScoreGoldenInt := 0;
+    ScoreTotalInt := 0;
+  end;
+end;
+
+procedure AddSpecialPath(var PathList: TStringList; const Path: string);
+var
+  I: integer;
+  PathAbs, OldPathAbs: string;
+begin
+  if (PathList = nil) then
+    PathList := TStringList.Create;
+
+  if (Path = '') or not DirectoryExists(Path) then
+    Exit;
+
+  PathAbs := IncludeTrailingPathDelimiter(ExpandFileName(Path));
+
+  // check if path or a part of the path was already added
+  for I := 0 to PathList.Count-1 do
+  begin
+    OldPathAbs := IncludeTrailingPathDelimiter(ExpandFileName(PathList[I]));
+    // check if the new directory is a sub-directory of a previously added one.
+    // This is also true, if both paths point to the same directories.
+    if (AnsiStartsText(OldPathAbs, PathAbs)) then
+    begin
+      // ignore the new path
+      Exit;
+    end;
+
+    // check if a previously added directory is a sub-directory of the new one.
+    if (AnsiStartsText(PathAbs, OldPathAbs)) then
+    begin
+      // replace the old with the new one.
+      PathList[I] := PathAbs;
+      Exit;
+    end;
+  end;
+
+  PathList.Add(PathAbs);
+end;
+
+procedure AddSongPath(const Path: string);
+begin
+  AddSpecialPath(SongPaths, Path);
+end;
+
+procedure AddCoverPath(const Path: string);
+begin
+  AddSpecialPath(CoverPaths, Path);
+end;
+
+(**
+ * Initialize a path variable
+ * After setting paths, make sure that paths exist
+ *)
+function FindPath(out PathResult: string; const RequestedPath: string; NeedsWritePermission: boolean): boolean;
+begin
+  Result := false;
+
+  if (RequestedPath = '') then
+    Exit;
+
+  // Make sure the directory exists
+  if (not ForceDirectories(RequestedPath)) then
+  begin
+    PathResult := '';
+    Exit;
+  end;
+
+  PathResult := IncludeTrailingPathDelimiter(RequestedPath);
+
+  if (NeedsWritePermission) and
+     (FileIsReadOnly(RequestedPath)) then
+  begin
+    Exit;
+  end;
+
+  Result := true;
+end;
+
+(**
+ * Function sets all absolute paths e.g. song path and makes sure the directorys exist
+ *)
+procedure InitializePaths;
+begin
+  // Log directory (must be writable)
+  if (not FindPath(LogPath, Platform.GetLogPath, true)) then
+  begin
+    Log.FileOutputEnabled := false;
+    Log.LogWarn('Log directory "'+ Platform.GetLogPath +'" not available', 'InitializePaths');
+  end;
+
+  FindPath(SoundPath,        Platform.GetGameSharedPath + 'sounds', false);
+  FindPath(ThemePath,        Platform.GetGameSharedPath + 'themes', false);
+  FindPath(SkinsPath,        Platform.GetGameSharedPath + 'themes', false);
+  FindPath(LanguagesPath,    Platform.GetGameSharedPath + 'languages', false);
+  FindPath(PluginPath,       Platform.GetGameSharedPath + 'plugins', false);
+  FindPath(VisualsPath,      Platform.GetGameSharedPath + 'visuals', false);
+  FindPath(ResourcesPath,    Platform.GetGameSharedPath + 'resources', false);
+
+  // Playlists are not shared as we need one directory to write too
+  FindPath(PlaylistPath, Platform.GetGameUserPath + 'playlists', true);
+  
+  // Screenshot directory (must be writable)
+  if (not FindPath(ScreenshotsPath,  Platform.GetGameUserPath + 'screenshots', true)) then
+  begin
+    Log.LogWarn('Screenshot directory "'+ Platform.GetGameUserPath +'" not available', 'InitializePaths');
+  end;
+
+  // Add song paths
+  AddSongPath(Params.SongPath);
+  AddSongPath(Platform.GetGameSharedPath + 'songs');
+  AddSongPath(Platform.GetGameUserPath + 'songs');
+
+  // Add category cover paths
+  AddCoverPath(Platform.GetGameSharedPath + 'covers');
+  AddCoverPath(Platform.GetGameUserPath + 'covers');
+end;
+
+end.