377 lines
11 KiB
C++
377 lines
11 KiB
C++
//=============================================================================
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// MuseScore
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// Music Composition & Notation
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//
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// Copyright (C) 2002-2007 Werner Schweer
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License version 2
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// as published by the Free Software Foundation and appearing in
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// the file LICENCE.GPL
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//=============================================================================
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#include "sig.h"
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#include "xml.h"
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namespace Ms {
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//---------------------------------------------------------
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// ticks_beat
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//---------------------------------------------------------
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static int ticks_beat(int n)
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{
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int m = (MScore::division * 4) / n;
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if ((MScore::division * 4) % n) {
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qDebug("Mscore: ticks_beat(): bad divisor %d", n);
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abort();
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}
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return m;
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}
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//---------------------------------------------------------
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// ticks_measure
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//---------------------------------------------------------
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static int ticks_measure(const Fraction& f)
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{
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return (MScore::division * 4 * f.numerator()) / f.denominator();
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}
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//---------------------------------------------------------
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// operator==
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//---------------------------------------------------------
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bool SigEvent::operator==(const SigEvent& e) const
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{
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return (_timesig.identical(e._timesig));
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}
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//---------------------------------------------------------
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// TimeSigMap
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//---------------------------------------------------------
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TimeSigMap::TimeSigMap()
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{
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}
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//---------------------------------------------------------
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// add
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//---------------------------------------------------------
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void TimeSigMap::add(int tick, const Fraction& f)
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{
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if (!f.isValid()) {
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qDebug("illegal signature %d/%d", f.numerator(), f.denominator());
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}
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(*this)[tick] = SigEvent(f);
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normalize();
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}
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void TimeSigMap::add(int tick, const SigEvent& ev)
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{
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(*this)[tick] = ev;
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normalize();
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}
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//---------------------------------------------------------
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// del
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//---------------------------------------------------------
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void TimeSigMap::del(int tick)
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{
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erase(tick);
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normalize();
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}
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//---------------------------------------------------------
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// TimeSigMap::normalize
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//---------------------------------------------------------
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void TimeSigMap::normalize()
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{
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int z = 4;
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int n = 4;
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int tick = 0;
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int bar = 0;
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int tm = ticks_measure(Fraction(z, n));
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for (auto i = begin(); i != end(); ++i) {
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SigEvent& e = i->second;
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e.setBar(bar + (i->first - tick) / tm);
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bar = e.bar();
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tick = i->first;
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tm = ticks_measure(e.timesig());
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}
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}
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//---------------------------------------------------------
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// timesig
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//---------------------------------------------------------
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const SigEvent& TimeSigMap::timesig(int tick) const
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{
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static const SigEvent ev(Fraction(4, 4));
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if (empty())
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return ev;
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auto i = upper_bound(tick);
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if (i != begin())
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--i;
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return i->second;
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}
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//---------------------------------------------------------
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// tickValues
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//---------------------------------------------------------
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void TimeSigMap::tickValues(int t, int* bar, int* beat, int* tick) const
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{
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if (empty()) {
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*bar = 0;
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*beat = 0;
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*tick = 0;
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return;
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}
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auto e = upper_bound(t);
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if (empty() || e == begin()) {
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qDebug("tickValue(0x%x) not found", t);
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abort();
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}
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--e;
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int delta = t - e->first;
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int ticksB = ticks_beat(e->second.timesig().denominator());
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int ticksM = ticksB * e->second.timesig().numerator();
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if (ticksM == 0) {
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qDebug("TimeSigMap::tickValues: at %d %s", t, qPrintable(e->second.timesig().print()));
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*bar = 0;
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*beat = 0;
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*tick = 0;
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return;
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}
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*bar = e->second.bar() + delta / ticksM;
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int rest = delta % ticksM;
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*beat = rest / ticksB;
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*tick = rest % ticksB;
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}
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//---------------------------------------------------------
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// pos
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// Return string representation of tick position.
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// This is not reentrant and only for debugging!
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//---------------------------------------------------------
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const char* TimeSigMap::pos(int t) const
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{
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static char* s = 0;
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delete s;
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int bar, beat, tick;
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tickValues(t, &bar, &beat, &tick);
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QString ss = QString("%1:%2:%3").arg(bar+1).arg(beat).arg(tick);
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s = strdup(qPrintable(ss));
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return s;
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}
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//---------------------------------------------------------
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// bar2tick
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//---------------------------------------------------------
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int TimeSigMap::bar2tick(int bar, int beat) const
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{
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auto e = begin();
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for (; e != end(); ++e) {
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if (bar < e->second.bar())
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break;
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}
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if (empty() || e == begin()) {
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qDebug("TimeSigMap::bar2tick(): not found(%d,%d) not found", bar, beat);
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if (empty())
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qDebug(" list is empty");
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return 0;
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}
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--e;
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int ticksB = ticks_beat(e->second.timesig().denominator());
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int ticksM = ticksB * e->second.timesig().numerator();
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return e->first + (bar - e->second.bar()) * ticksM + ticksB * beat;
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}
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//---------------------------------------------------------
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// TimeSigMap::write
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//---------------------------------------------------------
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void TimeSigMap::write(Xml& xml) const
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{
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xml.stag("siglist");
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for (auto i = begin(); i != end(); ++i)
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i->second.write(xml, i->first);
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xml.etag();
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}
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//---------------------------------------------------------
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// TimeSigMap::read
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//---------------------------------------------------------
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void TimeSigMap::read(XmlReader& e, int fileDivision)
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{
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while (e.readNextStartElement()) {
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const QStringRef& tag(e.name());
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if (tag == "sig") {
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SigEvent t;
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int tick = t.read(e, fileDivision);
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(*this)[tick] = t;
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}
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else
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e.unknown();
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}
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normalize();
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}
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//---------------------------------------------------------
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// SigEvent
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//---------------------------------------------------------
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SigEvent::SigEvent(const SigEvent& e)
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{
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_timesig = e._timesig;
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_nominal = e._nominal;
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_bar = e._bar;
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}
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//---------------------------------------------------------
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// SigEvent::write
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//---------------------------------------------------------
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void SigEvent::write(Xml& xml, int tick) const
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{
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xml.stag(QString("sig tick=\"%1\"").arg(tick));
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xml.tag("nom", _timesig.numerator());
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xml.tag("denom", _timesig.denominator());
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xml.etag();
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}
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//---------------------------------------------------------
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// SigEvent::read
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//---------------------------------------------------------
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int SigEvent::read(XmlReader& e, int fileDivision)
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{
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int tick = e.intAttribute("tick", 0);
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tick = tick * MScore::division / fileDivision;
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int numerator = 1;
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int denominator = 1;
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int denominator2 = -1;
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int numerator2 = -1;
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while (e.readNextStartElement()) {
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const QStringRef& tag(e.name());
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if (tag == "nom")
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numerator = e.readInt();
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else if (tag == "denom")
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denominator = e.readInt();
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else if (tag == "nom2")
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numerator2 = e.readInt();
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else if (tag == "denom2")
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denominator2 = e.readInt();
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else
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e.unknown();
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}
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if ((numerator2 == -1) || (denominator2 == -1)) {
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numerator2 = numerator;
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denominator2 = denominator;
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}
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_timesig = Fraction(numerator, denominator);
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_nominal = Fraction(numerator2, denominator2);
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return tick;
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}
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//---------------------------------------------------------
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// raster
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//---------------------------------------------------------
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unsigned TimeSigMap::raster(unsigned t, int raster) const
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{
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if (raster == 1)
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return t;
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auto e = upper_bound(t);
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if (e == end()) {
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qDebug("TimeSigMap::raster(%x,)", t);
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return t;
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}
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int delta = t - e->first;
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int ticksM = ticks_beat(e->second.timesig().denominator()) * e->second.timesig().numerator();
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if (raster == 0)
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raster = ticksM;
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int rest = delta % ticksM;
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int bb = (delta/ticksM)*ticksM;
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return e->first + bb + ((rest + raster/2)/raster)*raster;
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}
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//---------------------------------------------------------
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// raster1
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// round down
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//---------------------------------------------------------
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unsigned TimeSigMap::raster1(unsigned t, int raster) const
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{
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if (raster == 1)
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return t;
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auto e = upper_bound(t);
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int delta = t - e->first;
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int ticksM = ticks_beat(e->second.timesig().denominator()) * e->second.timesig().numerator();
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if (raster == 0)
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raster = ticksM;
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int rest = delta % ticksM;
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int bb = (delta/ticksM)*ticksM;
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return e->first + bb + (rest/raster)*raster;
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}
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//---------------------------------------------------------
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// raster2
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// round up
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//---------------------------------------------------------
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unsigned TimeSigMap::raster2(unsigned t, int raster) const
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{
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if (raster == 1)
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return t;
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auto e = upper_bound(t);
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int delta = t - e->first;
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int ticksM = ticks_beat(e->second.timesig().denominator()) * e->second.timesig().numerator();
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if (raster == 0)
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raster = ticksM;
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int rest = delta % ticksM;
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int bb = (delta/ticksM)*ticksM;
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return e->first + bb + ((rest+raster-1)/raster)*raster;
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}
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//---------------------------------------------------------
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// rasterStep
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//---------------------------------------------------------
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int TimeSigMap::rasterStep(unsigned t, int raster) const
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{
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if (raster == 0) {
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auto e = upper_bound(t);
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return ticks_beat(e->second.timesig().denominator()) * e->second.timesig().numerator();
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}
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return raster;
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}
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//---------------------------------------------------------
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// TimeSigMap::dump
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//---------------------------------------------------------
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void TimeSigMap::dump() const
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{
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qDebug("TimeSigMap:");
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for (auto i = begin(); i != end(); ++i)
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qDebug("%6d timesig: %s measure: %d",
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i->first, qPrintable(i->second.timesig().print()), i->second.bar());
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}
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}
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