1 files changed, 115 insertions, 0 deletions
diff --git a/muse2/al/sig.h b/muse2/al/sig.h
new file mode 100644
index 00000000..53f060b5
--- /dev/null
+++ b/muse2/al/sig.h
@@ -0,0 +1,115 @@
+//=============================================================================
+//  AL
+//  Audio Utility Library
+//  $Id:$
+//
+//  Copyright (C) 2002-2006 by Werner Schweer and others
+//
+//  This program is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License version 2.
+//
+//  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; if not, write to the Free Software
+//  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//=============================================================================
+
+#ifndef __SIG_H__
+#define __SIG_H__
+
+#include "../muse/xml.h"
+class Xml;
+
+namespace AL {
+
+#ifndef MAX_TICK
+#define MAX_TICK (0x7fffffff/100)
+#endif
+
+///class Xml;
+
+//---------------------------------------------------------
+//   TimeSignature
+//---------------------------------------------------------
+
+struct TimeSignature {
+      int z, n;
+      TimeSignature() { z = 4; n = 4; }
+      TimeSignature(int a, int b) { z = a; n = b; }
+      bool isValid() const;
+     };
+
+//---------------------------------------------------------
+//   Signature Event
+//---------------------------------------------------------
+
+struct SigEvent {
+      TimeSignature sig;
+      unsigned tick;    // signature valid from this position
+      int bar;          // precomputed
+
+      ///int read(QDomNode);
+      ///void write(Xml&, int) const;
+      int read(Xml&);
+      void write(int, Xml&, int) const;
+
+      SigEvent() { }
+      SigEvent(const TimeSignature& s, unsigned tk) {
+            sig = s;
+            tick = tk;
+            bar = 0;
+            }
+      };
+
+//---------------------------------------------------------
+//   SigList
+//---------------------------------------------------------
+
+typedef std::map<unsigned, SigEvent*, std::less<unsigned> > SIGLIST;
+typedef SIGLIST::iterator iSigEvent;
+typedef SIGLIST::const_iterator ciSigEvent;
+typedef SIGLIST::reverse_iterator riSigEvent;
+typedef SIGLIST::const_reverse_iterator criSigEvent;
+
+class SigList : public SIGLIST {
+      int ticks_beat(int N) const;
+      void normalize();
+      int ticksMeasure(const TimeSignature&) const;
+      int ticksMeasure(int z, int n) const;
+
+   public:
+      SigList();
+      void clear();
+      void add(unsigned tick, const TimeSignature& s);
+      //void add(unsigned tick, int z, int n);
+      void del(unsigned tick);
+
+      ///void read(QDomNode);
+      ///void write(Xml&) const;
+      void read(Xml&);
+      void write(int, Xml&) const;
+      
+      void dump() const;
+
+      TimeSignature timesig(unsigned tick) const;
+      void timesig(unsigned tick, int& z, int& n) const;
+      void tickValues(unsigned t, int* bar, int* beat, unsigned* tick) const;
+      unsigned bar2tick(int bar, int beat, unsigned tick) const;
+
+      int ticksMeasure(unsigned tick) const;
+      int ticksBeat(unsigned tick) const;
+      unsigned raster(unsigned tick, int raster) const;
+      unsigned raster1(unsigned tick, int raster) const;    // round down
+      unsigned raster2(unsigned tick, int raster) const;    // round up
+      int rasterStep(unsigned tick, int raster) const;
+      };
+
+extern SigList sigmap;
+
+}
+
+#endif