1f9ccfcdce
git-subtree-dir: libmscore git-subtree-mainline:412ca45401git-subtree-split:6047361bd0
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//=============================================================================
|
|
// MuseScore
|
|
// Music Composition & Notation
|
|
// $Id: tempo.h 5574 2012-04-23 18:54:54Z wschweer $
|
|
//
|
|
// Copyright (C) 2002-2011 Werner Schweer
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License version 2
|
|
// as published by the Free Software Foundation and appearing in
|
|
// the file LICENCE.GPL
|
|
//=============================================================================
|
|
|
|
#ifndef __AL_TEMPO_H__
|
|
#define __AL_TEMPO_H__
|
|
|
|
class Xml;
|
|
|
|
enum TempoType { TEMPO_INVALID, TEMPO_FIX, TEMPO_RAMP };
|
|
|
|
//---------------------------------------------------------
|
|
// Tempo Event
|
|
//---------------------------------------------------------
|
|
|
|
struct TEvent {
|
|
TempoType type;
|
|
qreal tempo; // beats per second
|
|
qreal pause; // pause in seconds
|
|
qreal time; // precomputed time for tick in sec
|
|
|
|
TEvent();
|
|
TEvent(const TEvent& e);
|
|
TEvent(qreal bps, qreal seconds, TempoType t);
|
|
bool valid() const { return type != TEMPO_INVALID; }
|
|
};
|
|
|
|
//---------------------------------------------------------
|
|
// Tempomap
|
|
//---------------------------------------------------------
|
|
|
|
typedef std::map<int, TEvent>::iterator iTEvent;
|
|
typedef std::map<int, TEvent>::const_iterator ciTEvent;
|
|
typedef std::map<int, TEvent>::reverse_iterator riTEvent;
|
|
typedef std::map<int, TEvent>::const_reverse_iterator criTEvent;
|
|
|
|
class TempoMap : public std::map<int, TEvent> {
|
|
int _tempoSN; // serial no to track tempo changes
|
|
qreal _tempo; // tempo if not using tempo list (beats per second)
|
|
qreal _relTempo; // rel. tempo
|
|
|
|
void normalize();
|
|
void del(int tick);
|
|
|
|
public:
|
|
TempoMap();
|
|
void clear();
|
|
|
|
void dump() const;
|
|
|
|
qreal tempo(int tick) const;
|
|
|
|
qreal tick2time(int tick, int* sn = 0) const;
|
|
qreal tick2timeLC(int tick, int* sn) const;
|
|
qreal tick2time(int tick, qreal time, int* sn) const;
|
|
int time2tick(qreal time, int* sn = 0) const;
|
|
int time2tick(qreal time, int tick, int* sn) const;
|
|
int tempoSN() const { return _tempoSN; }
|
|
|
|
void setTempo(int t, qreal);
|
|
void setPause(int t, qreal);
|
|
void delTempo(int tick);
|
|
|
|
// int tick2samples(int tick);
|
|
// int samples2tick(int samples);
|
|
void setRelTempo(qreal val);
|
|
qreal relTempo() const { return _relTempo; }
|
|
};
|
|
|
|
#endif
|