//=========================================================
//  MusE
//  Linux Music Editor
//  $Id: tempo.h,v 1.2 2004/01/11 18:55:34 wschweer Exp $
//
//  (C) Copyright 1999/2000 Werner Schweer (ws@seh.de)
//=========================================================

#ifndef __TEMPO_H__
#define __TEMPO_H__

#include <map>

#ifndef MAX_TICK
#define MAX_TICK (0x7fffffff/100)
#endif

class Xml;

//---------------------------------------------------------
//   Tempo Event
//---------------------------------------------------------

struct TEvent {
      int tempo;
      unsigned tick;    // new tempo at tick
      unsigned frame;   // precomputed time for tick in sec

      int read(Xml&);
      void write(int, Xml&, int) const;

      TEvent() { }
      TEvent(unsigned t, unsigned tk) {
            tempo = t;
            tick  = tk;
            frame = 0;
            }
      };

//---------------------------------------------------------
//   TempoList
//---------------------------------------------------------

typedef std::map<unsigned, TEvent*, std::less<unsigned> > TEMPOLIST;
typedef TEMPOLIST::iterator iTEvent;
typedef TEMPOLIST::const_iterator ciTEvent;
typedef TEMPOLIST::reverse_iterator riTEvent;
typedef TEMPOLIST::const_reverse_iterator criTEvent;

class TempoList : public TEMPOLIST {
      int _tempoSN;           // serial no to track tempo changes
      bool useList;
      int _tempo;             // tempo if not using tempo list
      int _globalTempo;       // %percent 50-200%

      void normalize();
      void add(unsigned tick, int tempo);
      void change(unsigned tick, int newTempo);
      void del(iTEvent);
      void del(unsigned tick);

   public:
      TempoList();
      void clear();

      void read(Xml&);
      void write(int, Xml&) const;
      void dump() const;

      int tempo(unsigned tick) const;
      unsigned tick2frame(unsigned tick, unsigned frame, int* sn) const;
      unsigned tick2frame(unsigned tick, int* sn = 0) const;
      unsigned frame2tick(unsigned frame, int* sn = 0) const;
      unsigned frame2tick(unsigned frame, unsigned tick, int* sn) const;
      int tempoSN() const { return _tempoSN; }
      void setTempo(unsigned tick, int newTempo);
      void addTempo(unsigned t, int tempo);
      void delTempo(unsigned tick);
      void changeTempo(unsigned tick, int newTempo);
      bool setMasterFlag(unsigned tick, bool val);
      int globalTempo() const           { return _globalTempo; }
      void setGlobalTempo(int val);
      };

extern TempoList tempomap;
#endif
