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//=============================================================================
// 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__
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; }
};
//---------------------------------------------------------
// Signature Event
//---------------------------------------------------------
struct SigEvent {
TimeSignature sig;
unsigned tick; // signature valid from this position
int bar; // precomputed
int read(QDomNode);
void write(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;
public:
SigList();
void clear();
void add(unsigned tick, const TimeSignature& s);
void del(unsigned tick);
void read(QDomNode);
void write(Xml&) const;
void dump() const;
TimeSignature timesig(unsigned tick) 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
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