//=============================================================================
//  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 __TEMPO_H__
#define __TEMPO_H__

namespace AL {

#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(QDomNode);
      void write(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(QDomNode);
      void write(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