aboutsummaryrefslogblamecommitdiffstats
path: root/medley_new/src/base/USong.pas
blob: 0dd4b006b5f509e624dcefc93cb78cf112b31e84 (plain) (tree)
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889

































































                                                                        










                                                                    


























                                                                                                                 
                                                                                             













































                                                                                                   


                                                                        



























                                                                                                        
                                












                              



                                                    
































































































































































































































































































                                                                                                     
                          














































































































































































































































































































































































































                                                                                                                                                                                                  
                                                         



















                                                                     
                   










































































































































































































                                                                                                         




























                                                                         

































                                                                                                       

























                                                                                              


































































































                                                                                                                   






















































































































































































































                                                                                                                                               

































                                  
                    
                     
                          



















                                                                                     







                                                           






















                                           
{* UltraStar Deluxe - Karaoke Game
 *
 * UltraStar Deluxe is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING. If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *}

unit USong;

interface

{$IFDEF FPC}
  {$MODE Delphi}
{$ENDIF}

{$I switches.inc}

uses
  {$IFDEF MSWINDOWS}
    Windows,
  {$ELSE}
    {$IFNDEF DARWIN}
      syscall,
    {$ENDIF}
    baseunix,
    UnixType,
  {$ENDIF}
  SysUtils,
  Classes,
  UPlatform,
  ULog,
  UTexture,
  UCommon,
  {$IFDEF DARWIN}
    cthreads,
  {$ENDIF}
  {$IFDEF USE_PSEUDO_THREAD}
    PseudoThread,
  {$ENDIF}
  UCatCovers,
  UXMLSong,
  UUnicodeUtils,
  UTextEncoding,
  UFilesystem,
  UPath;

type

  TSingMode = ( smNormal, smPartyMode, smPlaylistRandom, smMedley );

  TMedleySource = ( msNone, msCalculated, msTag );

  TMedley = record
    Source:       TMedleySource;  //source of the information
    StartBeat:    integer;        //start beat of medley
    EndBeat:      integer;        //end beat of medley
    FadeIn_time:  real;           //FadeIn-Time in seconds
    FadeOut_time: real;           //FadeOut-Time in seconds
  end;

  TBPM = record
    BPM:        real;
    StartBeat:  real;
  end;

  TScore = record
    Name:       UTF8String;
    Score:      integer;
    Date:       UTF8String;
  end;

  { used to hold header tags that are not supported by this version of
    usdx (e.g. some tags from ultrastar 0.7.0) when songs are loaded in
    songeditor. They will be written the end of the song header }
  TCustomHeaderTag = record
    Tag: UTF8String;
    Content: UTF8String;
  end;

  TSong = class
  private
    FileLineNo  : integer;  // line, which is read last, for error reporting

    function DecodeFilename(Filename: RawByteString): IPath;
    procedure ParseNote(LineNumber: integer; TypeP: char; StartP, DurationP, NoteP: integer; LyricS: UTF8String);
    procedure NewSentence(LineNumberP: integer; Param1, Param2: integer);
    procedure FindRefrain(); // tries to find a refrain for the medley mode and preview start

    function ParseLyricStringParam(const Line: RawByteString; var LinePos: integer): RawByteString;
    function ParseLyricIntParam(const Line: RawByteString; var LinePos: integer): integer;
    function ParseLyricFloatParam(const Line: RawByteString; var LinePos: integer): extended;
    function ParseLyricCharParam(const Line: RawByteString; var LinePos: integer): AnsiChar;
    function ParseLyricText(const Line: RawByteString; var LinePos: integer): RawByteString;

    function ReadTXTHeader(SongFile: TTextFileStream; ReadCustomTags: Boolean): boolean;
    function ReadXMLHeader(const aFileName: IPath): boolean;

    function GetFolderCategory(const aFileName: IPath): UTF8String;
    function FindSongFile(Dir: IPath; Mask: UTF8String): IPath;
  public
    Path:         IPath; // kust path component of file (only set if file was found)
    Folder:       UTF8String; // for sorting by folder (only set if file was found)
    FileName:     IPath; // just name component of file (only set if file was found)

    // filenames
    Cover:      IPath;
    Mp3:        IPath;
    Background: IPath;
    Video:      IPath;

    // sorting methods
    Genre:      UTF8String;
    Edition:    UTF8String;
    Language:   UTF8String;
    Year:       Integer;

    Title:      UTF8String;
    Artist:     UTF8String;

    Creator:    UTF8String;

    CoverTex:   TTexture;

    VideoGAP:   real;
    NotesGAP:   integer;
    Start:      real; // in seconds
    Finish:     integer; // in miliseconds
    Relative:   boolean;
    Resolution: integer;
    BPM:        array of TBPM;
    GAP:        real; // in miliseconds

    Encoding:   TEncoding;
    PreviewStart: real;   // in seconds
    CalcMedley: boolean;  // if true => do not calc medley for that song
    Medley:     TMedley;  // medley params

    CustomTags: array of TCustomHeaderTag;

    Score:      array[0..2] of array of TScore;

    // these are used when sorting is enabled
    Visible:    boolean; // false if hidden, true if visible
    Main:       boolean; // false for songs, true for category buttons
    OrderNum:   integer; // has a number of category for category buttons and songs
    OrderTyp:   integer; // type of sorting for this button (0=name)
    CatNumber:  integer; // Count of Songs in Category for Cats and Number of Song in Category for Songs

    Base    : array[0..1] of integer;
    Rel     : array[0..1] of integer;
    Mult    : integer;
    MultBPM : integer;

    LastError: AnsiString;
    function  GetErrorLineNo: integer;
    property  ErrorLineNo: integer read GetErrorLineNo;


    constructor Create(); overload;
    constructor Create(const aFileName : IPath); overload;
    function    LoadSong: boolean;
    function    LoadXMLSong: boolean;
    function    Analyse(const ReadCustomTags: Boolean = false): boolean;
    function    AnalyseXML(): boolean;
    procedure   SetMedleyMode();
    procedure   Clear();
  end;

implementation

uses
  StrUtils,
  TextGL,
  UIni,
  UPathUtils,
  UMusic,  //needed for Lines
  UNote;   //needed for Player

const
  DEFAULT_FADE_IN_TIME = 8;   // for medley fade-in
  DEFAULT_FADE_OUT_TIME = 2;  // for medley fade-out

constructor TSong.Create();
begin
  inherited;

  // to-do : special create for category "songs"
  //dirty fix to fix folders=on
  Self.Path     := PATH_NONE();
  Self.FileName := PATH_NONE();
  Self.Cover    := PATH_NONE();
  Self.Mp3      := PATH_NONE();
  Self.Background:= PATH_NONE();
  Self.Video    := PATH_NONE();
end;

// This may be changed, when we rewrite song select code.
// it is some kind of dirty, but imho the best possible
// solution as we do atm not support nested categorys.
// it works like the folder sorting in 1.0.1a
// folder is set to the first folder under the songdir
// so songs ~/.ultrastardx/songs/punk is in the same
// category as songs in shared/ultrastardx/songs are.
// note: folder is just the name of a category it has
//       nothing to do with the path used for file loading
function TSong.GetFolderCategory(const aFileName: IPath): UTF8String;
var
  I: Integer;
  CurSongPath: IPath;
  CurSongPathRel: IPath;
begin
  Result := 'Unknown'; //default folder category, if we can't locate the song dir

  for I := 0 to SongPaths.Count-1 do
  begin
    CurSongPath := SongPaths[I] as IPath;
    if (aFileName.IsChildOf(CurSongPath, false)) then
    begin
      if (aFileName.IsChildOf(CurSongPath, true)) then
      begin
        // songs are in the "root" of the songdir => use songdir for the categorys name
        Result := CurSongPath.RemovePathDelim.ToUTF8;
      end
      else
      begin
        // use the first subdirectory below CurSongPath as the category name
        CurSongPathRel := aFileName.GetRelativePath(CurSongPath.AppendPathDelim);
        Result := CurSongPathRel.SplitDirs[0].RemovePathDelim.ToUTF8;
      end;
      Exit;
    end;
  end;
end;

constructor TSong.Create(const aFileName: IPath);
begin
  inherited Create();

  Mult    := 1;
  MultBPM := 4;

  LastError := '';

  Self.Path     := aFileName.GetPath;
  Self.FileName := aFileName.GetName;
  Self.Folder   := GetFolderCategory(aFileName);

  (*
  if (aFileName.IsFile) then
  begin
    if ReadTXTHeader(aFileName) then
    begin
      LoadSong();
    end
    else
    begin
      Log.LogError('Error Loading SongHeader, abort Song Loading');
      Exit;
    end;
  end;
  *)
end;

function TSong.FindSongFile(Dir: IPath; Mask: UTF8String): IPath;
var
  Iter: IFileIterator;
  FileInfo: TFileInfo;
  FileName: IPath;
begin
  Iter := FileSystem.FileFind(Dir.Append(Mask), faDirectory);
  if (Iter.HasNext) then
    Result := Iter.Next.Name
  else
    Result := PATH_NONE;
end;

function TSong.DecodeFilename(Filename: RawByteString): IPath;
begin
  Result := UPath.Path(DecodeStringUTF8(Filename, Encoding));
end;

type
  EUSDXParseException = class(Exception);

{**
 * Parses the Line string starting from LinePos for a parameter.
 * Leading whitespace is trimmed, same applies to the first trailing whitespace.
 * After the call LinePos will point to the position after the first trailing
 * whitespace.
 *
 * Raises an EUSDXParseException if no string was found.
 *
 * Example:
 *   ParseLyricParam(Line:'Param0  Param1 Param2', LinePos:8, ...)
 *   -> Param:'Param1', LinePos:16 (= start of 'Param2')
 *}
function TSong.ParseLyricStringParam(const Line: RawByteString; var LinePos: integer): RawByteString;
var
  Start: integer;
  OldLinePos: integer;
const
  Whitespace = [#9, ' '];
begin
  OldLinePos := LinePos;

  Start := 0;
  while (LinePos <= Length(Line)) do
  begin
    if (Line[LinePos] in Whitespace) then
    begin
      // check for end of param
      if (Start > 0) then
        Break;
    end
    // check for beginning of param
    else if (Start = 0) then
    begin
      Start := LinePos;
    end;
    Inc(LinePos);
  end;

  // check if param was found
  if (Start = 0) then
  begin
    LinePos := OldLinePos;
    raise EUSDXParseException.Create('String expected');
  end
  else
  begin
    // copy param without trailing whitespace
    Result := Copy(Line, Start, LinePos-Start);
    // skip first trailing whitespace (if not at EOL)
    if (LinePos <= Length(Line)) then
      Inc(LinePos);
  end;
end;

function TSong.ParseLyricIntParam(const Line: RawByteString; var LinePos: integer): integer;
var
  Str: RawByteString;
  OldLinePos: integer;
begin
  OldLinePos := LinePos;
  Str := ParseLyricStringParam(Line, LinePos);

  if not TryStrToInt(Str, Result) then
  begin // on convert error
    Result := 0;
    LinePos := OldLinePos;
    raise EUSDXParseException.Create('Integer expected');
  end;
end;

function TSong.ParseLyricFloatParam(const Line: RawByteString; var LinePos: integer): extended;
var
  Str: RawByteString;
  OldLinePos: integer;
begin
  OldLinePos := LinePos;
  Str := ParseLyricStringParam(Line, LinePos);

  if not TryStrToFloat(Str, Result) then
  begin // on convert error
    Result := 0;
    LinePos := OldLinePos;
    raise EUSDXParseException.Create('Float expected');
  end;
end;

function TSong.ParseLyricCharParam(const Line: RawByteString; var LinePos: integer): AnsiChar;
var
  Str: RawByteString;
  OldLinePos: integer;
begin
  OldLinePos := LinePos;
  Str := ParseLyricStringParam(Line, LinePos);
  
  if (Length(Str) < 1) then
  begin
    LinePos := OldLinePos;
    raise EUSDXParseException.Create('Character expected');
  end
  else if (Length(Str) > 1) then
  begin
    Log.LogWarn(Format('"%s" in line %d: %s',
        [FileName.ToNative, FileLineNo, 'character expected but found "' + Str + '"']),
        'TSong.ParseLyricCharParam');
  end;
       
  LinePos := OldLinePos + 1;
  Result := Str[1];
end;

{**
 * Returns the rest of the line from LinePos as lyric text.
 * Leading and trailing whitespace is not trimmed.
 *}
function TSong.ParseLyricText(const Line: RawByteString; var LinePos: integer): RawByteString;
begin
  if (LinePos > Length(Line)) then
    Result := ''
  else
  begin
    Result := Copy(Line, LinePos, Length(Line)-LinePos+1);
    LinePos := Length(Line)+1;
  end;
end;

//Load TXT Song
function TSong.LoadSong(): boolean;
var
  CurLine: RawByteString;
  LinePos:  integer;
  Count:    integer;
  Both:     boolean;

  Param0:    AnsiChar;
  Param1:    integer;
  Param2:    integer;
  Param3:    integer;
  ParamLyric: UTF8String;

  I:        integer;
  NotesFound: boolean;
  SongFile: TTextFileStream;
  FileNamePath: IPath;
begin
  Result := false;
  LastError := '';

  FileNamePath := Path.Append(FileName);
  if not FileNamePath.IsFile() then
  begin
    LastError := 'ERROR_CORRUPT_SONG_FILE_NOT_FOUND';
    Log.LogError('File not found: "' + FileNamePath.ToNative + '"', 'TSong.LoadSong()');
    Exit;
  end;

  MultBPM           := 4; // multiply beat-count of note by 4
  Mult              := 1; // accuracy of measurement of note
  Rel[0]            := 0;
  Both              := false;

  if Length(Player) = 2 then
    Both := true;

  try
    // Open song file for reading.....
    SongFile := TMemTextFileStream.Create(FileNamePath, fmOpenRead);
    try
      //Search for Note Beginning
      FileLineNo := 0;
      NotesFound := false;
      while (SongFile.ReadLine(CurLine)) do
      begin
        Inc(FileLineNo);
        if (Length(CurLine) > 0) and (CurLine[1] in [':', 'F', '*']) then
        begin
          NotesFound := true;
          Break;
        end;
      end;

      if (not NotesFound) then
      begin //Song File Corrupted - No Notes
        Log.LogError('Could not load txt File, no notes found: ' + FileNamePath.ToNative);
        LastError := 'ERROR_CORRUPT_SONG_NO_NOTES';
        Exit;
      end;

      SetLength(Lines, 0);
      SetLength(Lines, 2);
      for Count := 0 to High(Lines) do
      begin
        Lines[Count].High := 0;
        Lines[Count].Number := 1;
        Lines[Count].Current := 0;
        Lines[Count].Resolution := self.Resolution;
        Lines[Count].NotesGAP   := self.NotesGAP;
        Lines[Count].ScoreValue := 0;

        //Add first line and set some standard values to fields
        //see procedure NewSentence for further explantation
        //concerning most of these values
        SetLength(Lines[Count].Line, 1);
        Lines[Count].Line[0].HighNote := -1;
        Lines[Count].Line[0].LastLine := false;
        Lines[Count].Line[0].BaseNote := High(Integer);
        Lines[Count].Line[0].TotalNotes := 0;
      end;

      while true do
      begin
        LinePos := 1;

        Param0 := ParseLyricCharParam(CurLine, LinePos);
        if (Param0 = 'E') then
        begin
          Break
        end
        else if (Param0 in [':', '*', 'F']) then
        begin
          // read notes
          Param1 := ParseLyricIntParam(CurLine, LinePos);
          Param2 := ParseLyricIntParam(CurLine, LinePos);
          Param3 := ParseLyricIntParam(CurLine, LinePos);
          ParamLyric := ParseLyricText(CurLine, LinePos);

          //Check for ZeroNote
          if Param2 = 0 then
          begin
            Log.LogWarn(Format('"%s" in line %d: %s',
              [FileNamePath.ToNative, FileLineNo,
              'found note with length zero -> converted to FreeStyle']),
              'TSong.LoadSong');
            //Log.LogError('Found zero-length note at "'+Param0+' '+IntToStr(Param1)+' '+IntToStr(Param2)+' '+IntToStr(Param3)+ParamLyric+'" -> Note ignored!')
            Param0 := 'F';
          end;

          // add notes
          if not Both then
            // P1
            ParseNote(0, Param0, (Param1+Rel[0]) * Mult, Param2 * Mult, Param3, ParamLyric)
          else
          begin
            // P1 + P2
            ParseNote(0, Param0, (Param1+Rel[0]) * Mult, Param2 * Mult, Param3, ParamLyric);
            ParseNote(1, Param0, (Param1+Rel[1]) * Mult, Param2 * Mult, Param3, ParamLyric);
          end;
        end // if

        else if Param0 = '-' then
        begin
          // reads sentence
          Param1 := ParseLyricIntParam(CurLine, LinePos);
          if self.Relative then
            Param2 := ParseLyricIntParam(CurLine, LinePos); // read one more data for relative system

          // new sentence
          if not Both then
            // P1
            NewSentence(0, (Param1 + Rel[0]) * Mult, Param2)
          else
          begin
            // P1 + P2
            NewSentence(0, (Param1 + Rel[0]) * Mult, Param2);
            NewSentence(1, (Param1 + Rel[1]) * Mult, Param2);
          end;
        end // if

        else if Param0 = 'B' then
        begin
          SetLength(self.BPM, Length(self.BPM) + 1);
          self.BPM[High(self.BPM)].StartBeat := ParseLyricFloatParam(CurLine, LinePos);
          self.BPM[High(self.BPM)].StartBeat := self.BPM[High(self.BPM)].StartBeat + Rel[0];

          self.BPM[High(self.BPM)].BPM := ParseLyricFloatParam(CurLine, LinePos);
          self.BPM[High(self.BPM)].BPM := self.BPM[High(self.BPM)].BPM * Mult * MultBPM;
        end;

        // Read next line in File
        if (not SongFile.ReadLine(CurLine)) then
          Break;

        Inc(FileLineNo);
      end; // while
    finally
      SongFile.Free;
    end;
  except
    on E: Exception do
    begin
      Log.LogError(Format('Error loading file: "%s" in line %d,%d: %s',
                  [FileNamePath.ToNative, FileLineNo, LinePos, E.Message]));
      Exit;
    end;
  end;

  for I := 0 to High(Lines) do
  begin
    if ((Both) or (I = 0)) then
    begin
      if (Length(Lines[I].Line) < 2) then
      begin
        LastError := 'ERROR_CORRUPT_SONG_NO_BREAKS';
        Log.LogError('Error loading file: Can''t find any linebreaks in "' + FileNamePath.ToNative + '"');
        exit;
      end;

      if (Lines[I].Line[Lines[I].High].HighNote < 0) then
      begin
        SetLength(Lines[I].Line, Lines[I].Number - 1);
        Lines[I].High := Lines[I].High - 1;
        Lines[I].Number := Lines[I].Number - 1;
        Log.LogError('Error loading Song, sentence w/o note found in last line before E: ' + FileNamePath.ToNative);
      end;
    end;
  end;

  for Count := 0 to High(Lines) do
  begin
    if (High(Lines[Count].Line) >= 0) then
      Lines[Count].Line[High(Lines[Count].Line)].LastLine := true;
  end;

  Result := true;
end;

//Load XML Song
function TSong.LoadXMLSong(): boolean;
var
  Count:     integer;
  Both:      boolean;
  Param1:    integer;
  Param2:    integer;
  Param3:    integer;
  ParamS:    string;
  I, J:      integer;
  NoteIndex: integer;

  NoteType:  char;
  SentenceEnd, Rest, Time: integer;
  Parser: TParser;
  FileNamePath: IPath;
begin
  Result := false;
  LastError := '';

  FileNamePath := Path.Append(FileName);
  if not FileNamePath.IsFile() then
  begin
    Log.LogError('File not found: "' + FileNamePath.ToNative + '"', 'TSong.LoadSong()');
    exit;
  end;

  MultBPM           := 4; // multiply beat-count of note by 4
  Mult              := 1; // accuracy of measurement of note
  Lines[0].ScoreValue := 0;
  self.Relative     := false;
  Rel[0]            := 0;
  Both              := false;

  if Length(Player) = 2 then
    Both := true;

  Parser := TParser.Create;
  Parser.Settings.DashReplacement := '~';

  for Count := 0 to High(Lines) do
  begin
    Lines[Count].High := 0;
      Lines[Count].Number := 1;
      Lines[Count].Current := 0;
      Lines[Count].Resolution := self.Resolution;
      Lines[Count].NotesGAP   := self.NotesGAP;
      Lines[Count].ScoreValue := 0;

      //Add first line and set some standard values to fields
      //see procedure NewSentence for further explantation
      //concerning most of these values
      SetLength(Lines[Count].Line, 1);
      Lines[Count].Line[0].HighNote := -1;
      Lines[Count].Line[0].LastLine := false;
      Lines[Count].Line[0].BaseNote := High(Integer);
      Lines[Count].Line[0].TotalNotes := 0;
  end;

  //Try to Parse the Song

  if Parser.ParseSong(FileNamePath) then
  begin
    //Writeln('XML Inputfile Parsed succesful');

    //Start write parsed information to Song
    //Notes Part
    for I := 0 to High(Parser.SongInfo.Sentences) do
    begin
      //Add Notes
      for J := 0 to High(Parser.SongInfo.Sentences[I].Notes) do
      begin
        case Parser.SongInfo.Sentences[I].Notes[J].NoteTyp of
          NT_Normal:    NoteType := ':';
          NT_Golden:    NoteType := '*';
          NT_Freestyle: NoteType := 'F';
        end;

        Param1:=Parser.SongInfo.Sentences[I].Notes[J].Start;       //Note Start
        Param2:=Parser.SongInfo.Sentences[I].Notes[J].Duration;    //Note Duration
        Param3:=Parser.SongInfo.Sentences[I].Notes[J].Tone;        //Note Tone
        ParamS:=' ' + Parser.SongInfo.Sentences[I].Notes[J].Lyric; //Note Lyric

        if not Both then
          // P1
          ParseNote(0, NoteType, (Param1+Rel[0]) * Mult, Param2 * Mult, Param3, ParamS)
        else
        begin
          // P1 + P2
          ParseNote(0, NoteType, (Param1+Rel[0]) * Mult, Param2 * Mult, Param3, ParamS);
          ParseNote(1, NoteType, (Param1+Rel[1]) * Mult, Param2 * Mult, Param3, ParamS);
        end;

      end; //J Forloop

      //Add Sentence break
      if (I < High(Parser.SongInfo.Sentences)) then
      begin
        SentenceEnd := Parser.SongInfo.Sentences[I].Notes[High(Parser.SongInfo.Sentences[I].Notes)].Start + Parser.SongInfo.Sentences[I].Notes[High(Parser.SongInfo.Sentences[I].Notes)].Duration;
        Rest := Parser.SongInfo.Sentences[I+1].Notes[0].Start - SentenceEnd;

        //Calculate Time
        case Rest of
          0, 1: Time := Parser.SongInfo.Sentences[I+1].Notes[0].Start;
          2:    Time := Parser.SongInfo.Sentences[I+1].Notes[0].Start - 1;
          3:    Time := Parser.SongInfo.Sentences[I+1].Notes[0].Start - 2;
          else
            if (Rest >= 4) then
              Time := SentenceEnd + 2
            else //Sentence overlapping :/
              Time := Parser.SongInfo.Sentences[I+1].Notes[0].Start;
        end;
        // new sentence
        if not Both then // P1
          NewSentence(0, (Time + Rel[0]) * Mult, Param2)
        else
        begin // P1 + P2
          NewSentence(0, (Time + Rel[0]) * Mult, Param2);
          NewSentence(1, (Time + Rel[1]) * Mult, Param2);
        end;

      end;
    end;
    //End write parsed information to Song
    Parser.Free;
  end
  else
  begin
    Log.LogError('Could not parse inputfile: ' + FileNamePath.ToNative);
    exit;
  end;

  for Count := 0 to High(Lines) do
  begin
    Lines[Count].Line[High(Lines[Count].Line)].LastLine := true;
  end;

  Result := true;
end;

function TSong.ReadXMLHeader(const aFileName : IPath): boolean;
var
  Done        : byte;
  Parser      : TParser;
  FileNamePath: IPath;
begin
  Result := true;
  Done   := 0;

  //Parse XML
  Parser := TParser.Create;
  Parser.Settings.DashReplacement := '~';

  FileNamePath := Self.Path.Append(Self.FileName);
  if Parser.ParseSong(FileNamePath) then
  begin
    //-----------
    //Required Attributes
    //-----------

    //Title
    self.Title := Parser.SongInfo.Header.Title;

    //Add Title Flag to Done
    Done := Done or 1;

    //Artist
    self.Artist := Parser.SongInfo.Header.Artist;

    //Add Artist Flag to Done
    Done := Done or 2;

    //MP3 File //Test if Exists
    Self.Mp3 := FindSongFile(Self.Path, '*.mp3');
    //Add Mp3 Flag to Done
    if (Self.Path.Append(Self.Mp3).IsFile()) then
      Done := Done or 4;

    //Beats per Minute
    SetLength(self.BPM, 1);
    self.BPM[0].StartBeat := 0;

    self.BPM[0].BPM := (Parser.SongInfo.Header.BPM * Parser.SongInfo.Header.Resolution/4  ) * Mult * MultBPM;

    //Add BPM Flag to Done
    if self.BPM[0].BPM <> 0 then
      Done := Done or 8;

    //---------
    //Additional Header Information
    //---------

    // Gap
    self.GAP := Parser.SongInfo.Header.Gap;

    //Cover Picture
    self.Cover := FindSongFile(Path, '*[CO].jpg');

    //Background Picture
    self.Background := FindSongFile(Path, '*[BG].jpg');

    // Video File
    //    self.Video := Value

    // Video Gap
    //  self.VideoGAP := StrtoFloatI18n( Value )

    //Genre Sorting
    self.Genre := Parser.SongInfo.Header.Genre;

    //Edition Sorting
    self.Edition := Parser.SongInfo.Header.Edition;

    //Year Sorting
    //Parser.SongInfo.Header.Year

    //Language Sorting
    self.Language := Parser.SongInfo.Header.Language;
  end
  else
    Log.LogError('File incomplete or not SingStar XML (A): ' + aFileName.ToNative);

  Parser.Free;

  //Check if all Required Values are given
  if (Done <> 15) then
  begin
    Result := false;
    if (Done and 8) = 0 then      //No BPM Flag
      Log.LogError('BPM tag missing: ' + self.FileName.ToNative)
    else if (Done and 4) = 0 then //No MP3 Flag
      Log.LogError('MP3 tag/file missing: ' + self.FileName.ToNative)
    else if (Done and 2) = 0 then //No Artist Flag
      Log.LogError('Artist tag missing: ' + self.FileName.ToNative)
    else if (Done and 1) = 0 then //No Title Flag
      Log.LogError('Title tag missing: ' + self.FileName.ToNative)
    else //unknown Error
      Log.LogError('File incomplete or not SingStar XML (B - '+ inttostr(Done) +'): ' + aFileName.ToNative);
  end;

end;

{**
 * "International" StrToFloat variant. Uses either ',' or '.' as decimal
 * separator.
 *}
function StrToFloatI18n(const Value: string): extended;
var
  TempValue : string;
begin
  TempValue := Value;
  if (Pos(',', TempValue) <> 0) then
    TempValue[Pos(',', TempValue)] := '.';
  Result := StrToFloatDef(TempValue, 0);
end;

function TSong.ReadTXTHeader(SongFile: TTextFileStream; ReadCustomTags: Boolean): boolean;
var
  Line, Identifier: string;
  Value: string;
  SepPos: integer; // separator position
  Done: byte;      // bit-vector of mandatory fields
  MedleyFlags: byte; //bit-vector for medley/preview tags
  EncFile: IPath; // encoded filename
  FullFileName: string;

  { adds a custom header tag to the song
    if there is no ':' in the read line, Tag should be empty
    and the whole line should be in Content }
  procedure AddCustomTag(const Tag, Content: String);
    var Len: Integer;
  begin
    if ReadCustomTags then
    begin
      Len := Length(CustomTags);
      SetLength(CustomTags, Len + 1);
      CustomTags[Len].Tag := DecodeStringUTF8(Tag, Encoding);
      CustomTags[Len].Content := DecodeStringUTF8(Content, Encoding);
    end;
  end;
begin
  Result := true;
  Done   := 0;
  MedleyFlags := 0;

  FullFileName := Path.Append(Filename).ToNative;

  //Read first Line
  SongFile.ReadLine(Line);
  if (Length(Line) <= 0) then
  begin
    Log.LogError('File starts with empty line: ' + FullFileName,
                 'TSong.ReadTXTHeader');
    Result := false;
    Exit;
  end;

  // check if file begins with a UTF-8 BOM, if so set encoding to UTF-8
  if (CheckReplaceUTF8BOM(Line)) then
    Encoding := encUTF8;

  //Read Lines while Line starts with # or its empty
  while (Length(Line) = 0) or (Line[1] = '#') do
  begin
    //Increase Line Number
    Inc (FileLineNo);
    SepPos := Pos(':', Line);

    //Line has no Seperator, ignore non header field
    if (SepPos = 0) then
    begin
      AddCustomTag('', Copy(Line, 2, Length(Line) - 1));
      // read next line
      if (not SongFile.ReadLine(Line)) then
      begin
        Result := false;
        Log.LogError('File incomplete or not Ultrastar txt (A): ' + FullFileName);
        Break;
      end;
      Continue;
    end;

    //Read Identifier and Value
    Identifier  := UpperCase(Trim(Copy(Line, 2, SepPos - 2))); //Uppercase is for Case Insensitive Checks
    Value       := Trim(Copy(Line, SepPos + 1, Length(Line) - SepPos));

    //Check the Identifier (If Value is given)
    if (Length(Value) = 0) then
    begin
      Log.LogInfo('Empty field "'+Identifier+'" in file ' + FullFileName,
                   'TSong.ReadTXTHeader');
      AddCustomTag(Identifier, '');
    end
    else
    begin

      //-----------
      //Required Attributes
      //-----------

      if (Identifier = 'TITLE') then
      begin
        DecodeStringUTF8(Value, Title, Encoding);
        //Add Title Flag to Done
        Done := Done or 1;
      end

      else if (Identifier = 'ARTIST') then
      begin
        DecodeStringUTF8(Value, Artist, Encoding);
        //Add Artist Flag to Done
        Done := Done or 2;
      end

      //MP3 File
      else if (Identifier = 'MP3') then
      begin
        EncFile := DecodeFilename(Value);
        if (Self.Path.Append(EncFile).IsFile) then
        begin
          self.Mp3 := EncFile;

          //Add Mp3 Flag to Done
          Done := Done or 4;
        end;
      end

      //Beats per Minute
      else if (Identifier = 'BPM') then
      begin
        SetLength(self.BPM, 1);
        self.BPM[0].StartBeat := 0;

        self.BPM[0].BPM := StrToFloatI18n( Value ) * Mult * MultBPM;

        if self.BPM[0].BPM <> 0 then
        begin
          //Add BPM Flag to Done
          Done := Done or 8;
        end;
      end

      //---------
      //Additional Header Information
      //---------

      // Gap
      else if (Identifier = 'GAP') then
      begin
        self.GAP := StrToFloatI18n(Value);
      end

      //Cover Picture
      else if (Identifier = 'COVER') then
      begin
        self.Cover := DecodeFilename(Value);
      end

      //Background Picture
      else if (Identifier = 'BACKGROUND') then
      begin
        self.Background := DecodeFilename(Value);
      end

      // Video File
      else if (Identifier = 'VIDEO') then
      begin
        EncFile := DecodeFilename(Value);
        if (self.Path.Append(EncFile).IsFile) then
          self.Video := EncFile
        else
          Log.LogError('Can''t find video file in song: ' + FullFileName);
      end

      // Video Gap
      else if (Identifier = 'VIDEOGAP') then
      begin
        self.VideoGAP := StrToFloatI18n( Value )
      end

      //Genre Sorting
      else if (Identifier = 'GENRE') then
      begin
        DecodeStringUTF8(Value, Genre, Encoding)
      end

      //Edition Sorting
      else if (Identifier = 'EDITION') then
      begin
        DecodeStringUTF8(Value, Edition, Encoding)
      end

      //Creator Tag
      else if (Identifier = 'CREATOR') then
      begin
        DecodeStringUTF8(Value, Creator, Encoding)
      end

      //Language Sorting
      else if (Identifier = 'LANGUAGE') then
      begin
        DecodeStringUTF8(Value, Language, Encoding)
      end

      //Language Sorting
      else if (Identifier = 'YEAR') then
      begin
        TryStrtoInt(Value, self.Year)
      end

      // Song Start
      else if (Identifier = 'START') then
      begin
        self.Start := StrToFloatI18n( Value )
      end

      // Song Ending
      else if (Identifier = 'END') then
      begin
        TryStrtoInt(Value, self.Finish)
      end

      // Resolution
      else if (Identifier = 'RESOLUTION') then
      begin
        TryStrtoInt(Value, self.Resolution)
      end

      // Notes Gap
      else if (Identifier = 'NOTESGAP') then
      begin
        TryStrtoInt(Value, self.NotesGAP)
      end

      // Relative Notes
      else if (Identifier = 'RELATIVE') then
      begin
        if (UpperCase(Value) = 'YES') then
          self.Relative := true;
      end

      // File encoding
      else if (Identifier = 'ENCODING') then
      begin
        self.Encoding := ParseEncoding(Value, Ini.DefaultEncoding);
      end

      // PreviewStart
      else if (Identifier = 'PREVIEWSTART') then
      begin
        self.PreviewStart := StrToFloatI18n( Value );
        if (self.PreviewStart>0) then
          MedleyFlags := MedleyFlags or 1;
      end

      // MedleyStartBeat
      else if (Identifier = 'MEDLEYSTARTBEAT') and not self.Relative then
      begin
        if TryStrtoInt(Value, self.Medley.StartBeat) then
          MedleyFlags := MedleyFlags or 2;
      end

      // MedleyEndBeat
      else if (Identifier = 'MEDLEYENDBEAT') and not self.Relative then
      begin
        if TryStrtoInt(Value, self.Medley.EndBeat) then
          MedleyFlags := MedleyFlags or 4;
      end

      // Medley
      else if (Identifier = 'CALCMEDLEY') then
      begin
        if (Uppercase(Value) = 'OFF') then
          self.CalcMedley := false;
      end

      // unsupported tag
      else
      begin
        AddCustomTag(Identifier, Value);
      end;

    end; // End check for non-empty Value

    // read next line
    if (not SongFile.ReadLine(Line)) then
    begin
      Result := false;
      Log.LogError('File incomplete or not Ultrastar txt (A): ' + FullFileName);
      Break;
    end;
  end; // while

  if self.Cover.IsUnset then
    self.Cover := FindSongFile(Path, '*[CO].jpg');

  //Check if all Required Values are given
  if (Done <> 15) then
  begin
    Result := false;
    if (Done and 8) = 0 then      //No BPM Flag
      Log.LogError('BPM tag missing: ' + FullFileName)
    else if (Done and 4) = 0 then //No MP3 Flag
      Log.LogError('MP3 tag/file missing: ' + FullFileName)
    else if (Done and 2) = 0 then //No Artist Flag
      Log.LogError('Artist tag missing: ' + FullFileName)
    else if (Done and 1) = 0 then //No Title Flag
      Log.LogError('Title tag missing: ' + FullFileName)
    else //unknown Error
      Log.LogError('File incomplete or not Ultrastar txt (B - '+ inttostr(Done) +'): ' + FullFileName);
  end else
  begin //check medley tags
    if (MedleyFlags and 6)=6 then //MedleyStartBeat and MedleyEndBeat are both set
    begin
      if self.Medley.StartBeat >= self.Medley.EndBeat then
        MedleyFlags := MedleyFlags - 6;
    end;

    if ((MedleyFlags and 1)=0) or (self.PreviewStart<=0) then //PreviewStart is not set or <=0
    begin
      if (MedleyFlags and 2)=2 then
        self.PreviewStart := GetTimeFromBeat(self.Medley.StartBeat)  //fallback to MedleyStart
      else
        self.PreviewStart := 0; //else set it to 0, it will be set in FindRefrainStart
    end;

    if (MedleyFlags and 6)=6 then
    begin
      self.Medley.Source := msTag;

      //calculate fade time
      self.Medley.FadeIn_time := DEFAULT_FADE_IN_TIME;

      self.Medley.FadeOut_time := DEFAULT_FADE_OUT_TIME;
    end else
      self.Medley.Source := msNone;
  end;
end;

function  TSong.GetErrorLineNo: integer;
begin
  if (LastError='ERROR_CORRUPT_SONG_ERROR_IN_LINE') then
    Result := FileLineNo
  else
    Result := -1;
end;

procedure TSong.ParseNote(LineNumber: integer; TypeP: char; StartP, DurationP, NoteP: integer; LyricS: UTF8String);
begin
  with Lines[LineNumber].Line[Lines[LineNumber].High] do
  begin
    SetLength(Note, Length(Note) + 1);
    HighNote := High(Note);

    Note[HighNote].Start := StartP;
    if HighNote = 0 then
    begin
      if Lines[LineNumber].Number = 1 then
        Start := -100;
        //Start := Note[HighNote].Start;
    end;

    Note[HighNote].Length := DurationP;

    // back to the normal system with normal, golden and now freestyle notes
    case TypeP of
      'F':  Note[HighNote].NoteType := ntFreestyle;
      ':':  Note[HighNote].NoteType := ntNormal;
      '*':  Note[HighNote].NoteType := ntGolden;
    end;

    //add this notes value ("notes length" * "notes scorefactor") to the current songs entire value
    Inc(Lines[LineNumber].ScoreValue, Note[HighNote].Length * ScoreFactor[Note[HighNote].NoteType]);

    //and to the current lines entire value
    Inc(TotalNotes, Note[HighNote].Length * ScoreFactor[Note[HighNote].NoteType]);


    Note[HighNote].Tone := NoteP;

    //if a note w/ a deeper pitch then the current basenote is found
    //we replace the basenote w/ the current notes pitch
    if Note[HighNote].Tone < BaseNote then
      BaseNote := Note[HighNote].Tone;

    Note[HighNote].Color := 1; // default color to 1 for editor

    DecodeStringUTF8(LyricS, Note[HighNote].Text, Encoding);
    Lyric := Lyric + Note[HighNote].Text;

    End_ := Note[HighNote].Start + Note[HighNote].Length;
  end; // with
end;

procedure TSong.NewSentence(LineNumberP: integer; Param1, Param2: integer);
var
  I: integer;
begin

  if (Lines[LineNumberP].Line[Lines[LineNumberP].High].HighNote  <> -1) then
  begin //create a new line
    SetLength(Lines[LineNumberP].Line, Lines[LineNumberP].Number + 1);
    Inc(Lines[LineNumberP].High);
    Inc(Lines[LineNumberP].Number);
  end
  else
  begin //use old line if it there were no notes added since last call of NewSentence
    Log.LogError('Error loading Song, sentence w/o note found in line ' +
                 InttoStr(FileLineNo) + ': ' + Filename.ToNative);
  end;

  Lines[LineNumberP].Line[Lines[LineNumberP].High].HighNote := -1;

  //set the current lines value to zero
  //it will be incremented w/ the value of every added note
  Lines[LineNumberP].Line[Lines[LineNumberP].High].TotalNotes := 0;

  //basenote is the pitch of the deepest note, it is used for note drawing.
  //if a note with a less value than the current sentences basenote is found,
  //basenote will be set to this notes pitch. Therefore the initial value of
  //this field has to be very high.
  Lines[LineNumberP].Line[Lines[LineNumberP].High].BaseNote := High(Integer);


  if self.Relative then
  begin
    Lines[LineNumberP].Line[Lines[LineNumberP].High].Start := Param1;
    Rel[LineNumberP] := Rel[LineNumberP] + Param2;
  end
  else
    Lines[LineNumberP].Line[Lines[LineNumberP].High].Start := Param1;

  Lines[LineNumberP].Line[Lines[LineNumberP].High].LastLine := false;
end;

{* new procedure for preview
   tries find out the beginning of a refrain
   and the end... *}
procedure TSong.FindRefrain();
Const
  MEDLEY_MIN_DURATION = 40;   //minimum duration of a medley-song in seconds

Type
  TSeries = record
    start:    integer; //Start sentence of series
    end_:     integer; //End sentence of series
    len:      integer; //Length of sentence series
  end;

var
  I, J, K, num_lines:   integer;
  sentences:            array of UTF8String;
  series:               array of TSeries;
  temp_series:          TSeries;
  max:                  integer;
  len_lines, len_notes: integer;
  found_end:            boolean;
begin
  if self.Medley.Source = msTag then
    Exit;

  if not self.CalcMedley then
    Exit;

  //relative is not supported for medley!
  if self.Relative then
  begin
    Log.LogError('Song '+self.Artist+'-'+self.Title+' contains #Relative, this is not supported by medley-function!');
    self.Medley.Source := msNone;
    Exit;
  end;

  num_lines := Length(Lines[0].Line);
  SetLength(sentences, num_lines);

  //build sentences array
  for I := 0 to num_lines - 1 do
  begin
    sentences[I] := '';
    for J := 0 to Length(Lines[0].Line[I].Note) - 1 do
    begin
      if (Lines[0].Line[I].Note[J].NoteType <> ntFreestyle) then
        sentences[I] := sentences[I] + Lines[0].Line[I].Note[J].Text;
    end;
  end;

  //find equal sentences series
  SetLength(series, 0);

  for I := 0 to num_lines - 2 do
  begin
    for J := I+1 to num_lines - 1 do
    begin
      if sentences[I]=sentences[J] then
      begin
        temp_series.start := I;
        temp_series.end_  := I;

        if (J+J-I-1>num_lines-1) then
          max:=num_lines-1-J
        else
          max:=J-I-1;

        for K := 1 to max do
        begin
          if sentences[I+K]=sentences[J+K] then
            temp_series.end_ := I+K
          else
            break;
        end;
        temp_series.len := temp_series.end_ - temp_series.start + 1;
        SetLength(series, Length(series)+1);
        series[Length(series)-1] := temp_series;
      end;
    end;
  end;

  //search for longest sequence
  max := 0;
  if Length(series)>0 then
  begin
    for I := 0 to Length(series) - 1 do
    begin
      if series[I].len > series[max].len then
        max := I;
    end;
  end;

  len_lines := length(Lines[0].Line);

  if (Length(series)>0) and (series[max].len > 3) then
  begin
    self.Medley.StartBeat := Lines[0].Line[series[max].start].Note[0].Start;
    len_notes := length(Lines[0].Line[series[max].end_].Note);
    self.Medley.EndBeat := Lines[0].Line[series[max].end_].Note[len_notes-1].Start +
      Lines[0].Line[series[max].end_].Note[len_notes-1].Length;

    found_end := false;

    //set end if duration > MEDLEY_MIN_DURATION
    if GetTimeFromBeat(self.Medley.StartBeat)+ MEDLEY_MIN_DURATION >
      GetTimeFromBeat(self.Medley.EndBeat) then
    begin
      found_end := true;
    end;

    //estimate the end: just go MEDLEY_MIN_DURATION
    //ahead an set to a line end (if possible)
    if not found_end then
    begin
      for I := series[max].start+1 to len_lines-1 do
      begin
        len_notes := length(Lines[0].Line[I].Note);
        for J := 0 to len_notes - 1 do
        begin
          if GetTimeFromBeat(self.Medley.StartBeat)+ MEDLEY_MIN_DURATION >
            GetTimeFromBeat(Lines[0].Line[I].Note[J].Start+
            Lines[0].Line[I].Note[J].Length) then
          begin
            found_end := true;
            self.Medley.EndBeat := Lines[0].Line[I].Note[len_notes-1].Start+
              Lines[0].Line[I].Note[len_notes-1].Length;
            break;
          end;
        end;
      end;
    end;

    
    if found_end then
    begin
      self.Medley.Source := msCalculated;

      //calculate fade time
      self.Medley.FadeIn_time := DEFAULT_FADE_IN_TIME;
      self.Medley.FadeOut_time := DEFAULT_FADE_OUT_TIME;
    end;
  end;

  //set PreviewStart if not set
  if self.PreviewStart=0 then
  begin
    if self.Medley.Source = msCalculated then
      self.PreviewStart := GetTimeFromBeat(self.Medley.StartBeat);
  end;
end;

//sets a song to medley-mode:
//converts all unneeded notes into freestyle
//updates score values
procedure TSong.SetMedleyMode();
var
  pl, line, note: integer;
  cut_line: array of integer;
  foundcut: array of boolean;
  start:          integer;
  end_:           integer;

begin
  start := self.Medley.StartBeat;
  end_  := self.Medley.EndBeat;
  SetLength(cut_line, Length(Lines));
  SetLength(foundcut, Length(Lines));

  for pl := 0 to Length(Lines) - 1 do
  begin
    foundcut[pl] := false;
    cut_line[pl] := high(Integer);
    Lines[pl].ScoreValue := 0;
    for line := 0 to Length(Lines[pl].Line) - 1 do
    begin
      Lines[pl].Line[line].TotalNotes := 0;
      for note := 0 to Length(Lines[pl].Line[line].Note) - 1 do
      begin
        if Lines[pl].Line[line].Note[note].Start < start then      //check start
        begin
          Lines[pl].Line[line].Note[note].NoteType := ntFreeStyle;
        end else if Lines[pl].Line[line].Note[note].Start>= end_ then  //check end
        begin
          Lines[pl].Line[line].Note[note].NoteType := ntFreeStyle;
          if not foundcut[pl] then
          begin
            if (note=0) then
              cut_line[pl] := line
            else
              cut_line[pl] := line+1;
          end;
          foundcut[pl] := true;
        end else
        begin
          //add this notes value ("notes length" * "notes scorefactor") to the current songs entire value
          Inc(Lines[pl].ScoreValue, Lines[pl].Line[line].Note[note].Length * ScoreFactor[Lines[pl].Line[line].Note[note].NoteType]);
          //and to the current lines entire value
          Inc(Lines[pl].Line[line].TotalNotes, Lines[pl].Line[line].Note[note].Length * ScoreFactor[Lines[pl].Line[line].Note[note].NoteType]);
        end;
      end;
    end;
  end;

  for pl := 0 to Length(Lines) - 1 do
  begin
    if (foundcut[pl]) and (Length(Lines[pl].Line)>cut_line[pl]) then
    begin
      SetLength(Lines[pl].Line, cut_line[pl]);
      Lines[pl].High := cut_line[pl]-1;
      Lines[pl].Number := Lines[pl].High+1;
    end;
  end;
end;

procedure TSong.Clear();
begin
  //Main Information
  Title  := '';
  Artist := '';

  //Sortings:
  Genre    := 'Unknown';
  Edition  := 'Unknown';
  Language := 'Unknown';
  Year := 0;

  // set to default encoding
  Encoding := Ini.DefaultEncoding;

  // clear custom header tags
  SetLength(CustomTags, 0);

  //Required Information
  Mp3    := PATH_NONE;
  SetLength(BPM, 0);

  GAP    := 0;
  Start  := 0;
  Finish := 0;

  //Additional Information
  Background := PATH_NONE;
  Cover      := PATH_NONE;
  Video      := PATH_NONE;
  VideoGAP   := 0;
  NotesGAP   := 0;
  Resolution := 4;
  Creator    := '';
  PreviewStart := 0;
  CalcMedley := true;
  Medley.Source := msNone;

  Relative := false;
end;

function TSong.Analyse(const ReadCustomTags: Boolean): boolean;
var
  SongFile: TTextFileStream;
begin
  Result := false;

  //Reset LineNo
  FileLineNo := 0;

  //Open File and set File Pointer to the beginning
  SongFile := TMemTextFileStream.Create(Self.Path.Append(Self.FileName), fmOpenRead);
  try
    //Clear old Song Header
    Self.clear;

    //Read Header
    Result := Self.ReadTxTHeader(SongFile, ReadCustomTags);

    //Load Song for Medley Tags
    CurrentSong := self;
    Result := Result and LoadSong();

    if Result then
      Self.FindRefrain();
  finally
    SongFile.Free;
  end;
end;


function TSong.AnalyseXML(): boolean;

begin
  Result := false;

  //Reset LineNo
  FileLineNo := 0;

  //Clear old Song Header
  self.clear;

  //Read Header
  Result := self.ReadXMLHeader( FileName );

end;

end.