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authorbrunzelchen <brunzelchen@b956fd51-792f-4845-bead-9b4dfca2ff2c>2009-12-09 18:35:28 +0000
committerbrunzelchen <brunzelchen@b956fd51-792f-4845-bead-9b4dfca2ff2c>2009-12-09 18:35:28 +0000
commite4f413fdcf003ac0ad20d145f61dd370994e79db (patch)
tree692f725464654d0a82cdb0888c28e4dd21d68517 /Medley/src/base/UBeatTimer.pas
parentd267ce95e1743fad0d383d1d7fe51e9b8bf5b66f (diff)
downloadusdx-e4f413fdcf003ac0ad20d145f61dd370994e79db.tar.gz
usdx-e4f413fdcf003ac0ad20d145f61dd370994e79db.tar.xz
usdx-e4f413fdcf003ac0ad20d145f61dd370994e79db.zip
just a first experimental version
git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/branches/experimental@2011 b956fd51-792f-4845-bead-9b4dfca2ff2c
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diff --git a/Medley/src/base/UBeatTimer.pas b/Medley/src/base/UBeatTimer.pas
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+{* 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 UBeatTimer;
+
+interface
+
+{$IFDEF FPC}
+ {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses
+ UTime;
+
+type
+ (**
+ * 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;
+
+implementation
+uses UNote, Math;
+
+
+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;
+
+end. \ No newline at end of file