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//=============================================================================
// MusE Score
// Linux Music Score Editor
// $Id: sig.h 3482 2010-09-21 07:10:03Z lasconic $
//
// Copyright (C) 2002-2009 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 __AL_SIG_H__
#define __AL_SIG_H__
#include "fraction.h"
namespace AL {
class Xml;
//-------------------------------------------------------------------
// Time Signature Event
// Incomplete measures as for example pickup measures have
// a nominal duration different from actual duration.
//-------------------------------------------------------------------
struct SigEvent {
Fraction actual;
Fraction nominal;
int bar; ///< precomputed value
int ticks; ///< ticks per measure, precomputed value
int read(QDomElement, int fileDivision);
void write(Xml&, int) const;
SigEvent() : actual(0, 0) {} ///< default SigEvent is invalid
SigEvent(const Fraction&); ///< set regular event
SigEvent(const Fraction&, const Fraction&); ///< set irregular event
bool operator==(const SigEvent& e) const;
bool valid() const { return actual.isValid(); }
QString print() const {
return valid() ? actual.print() : QString("void");
}
bool nominalEqual(const SigEvent& e) const {
return nominal.identical(e.nominal);
}
bool nominalEqualActual() const { return actual.identical(nominal); }
Fraction fraction() const { return actual; }
Fraction getNominal() const { return nominal; }
};
//---------------------------------------------------------
// SigList
//---------------------------------------------------------
typedef std::map<const int, SigEvent>::iterator iSigEvent;
typedef std::map<const int, SigEvent>::const_iterator ciSigEvent;
class TimeSigMap : public std::map<const int, SigEvent > {
unsigned _serial;
void normalize();
public:
TimeSigMap();
void add(int tick, const Fraction&);
void add(int tick, const Fraction& a, const Fraction& n);
void add(int tick, int ticks, const Fraction& nominal);
void add(int tick, const SigEvent& ev);
void del(int tick);
void read(QDomElement, int fileDiv);
void write(Xml&) const;
void dump() const;
const SigEvent& timesig(int tick) const;
void tickValues(int t, int* bar, int* beat, int* tick) const;
int bar2tick(int bar, int beat, int tick) const;
int ticksMeasure(int tick) const;
void removeTime(int start, int len);
void insertTime(int start, int len);
int serial() const { return _serial; }
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;
Fraction measureRest(unsigned tick) const;
};
extern int ticks_measure(const Fraction&);
} // namespace AL
#endif
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