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139 lines
3.1 KiB
139 lines
3.1 KiB
/*
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Rosegarden
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A sequencer and musical notation editor.
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This program is Copyright 2000-2008
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Guillaume Laurent <glaurent@telegraph-road.org>,
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Chris Cannam <cannam@all-day-breakfast.com>,
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Richard Bown <bownie@bownie.com>
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The moral right of the authors to claim authorship of this work
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has been asserted.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#include "LegatoQuantizer.h"
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#include "BaseProperties.h"
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#include "NotationTypes.h"
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#include "Selection.h"
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#include "Composition.h"
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#include "Profiler.h"
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#include <iostream>
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#include <cmath>
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#include <cstdio> // for sprintf
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#include <ctime>
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using std::cout;
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using std::cerr;
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using std::endl;
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namespace Rosegarden
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{
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using namespace BaseProperties;
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LegatoQuantizer::LegatoQuantizer(timeT unit) :
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Quantizer(RawEventData),
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m_unit(unit)
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{
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if (m_unit < 0) m_unit = Note(Note::Shortest).getDuration();
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}
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LegatoQuantizer::LegatoQuantizer(std::string source, std::string target, timeT unit) :
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Quantizer(source, target),
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m_unit(unit)
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{
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if (m_unit < 0) m_unit = Note(Note::Shortest).getDuration();
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}
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LegatoQuantizer::LegatoQuantizer(const LegatoQuantizer &q) :
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Quantizer(q.m_target),
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m_unit(q.m_unit)
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{
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// nothing else
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}
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LegatoQuantizer::~LegatoQuantizer()
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{
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// nothing
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}
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void
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LegatoQuantizer::quantizeRange(Segment *s,
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Segment::iterator from,
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Segment::iterator to) const
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{
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Segment::iterator tmp;
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while (from != to) {
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quantizeSingle(s, from, tmp);
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from = tmp;
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if (!s->isBeforeEndMarker(from) ||
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(s->isBeforeEndMarker(to) &&
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((*from)->getAbsoluteTime() >= (*to)->getAbsoluteTime()))) break;
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}
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}
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void
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LegatoQuantizer::quantizeSingle(Segment *s, Segment::iterator i,
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Segment::iterator &nexti) const
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{
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// Stretch each note out to reach the quantized start time of the
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// next note whose quantized start time is greater than or equal
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// to the end time of this note after quantization
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timeT t = getFromSource(*i, AbsoluteTimeValue);
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timeT d = getFromSource(*i, DurationValue);
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timeT d0(d), t0(t);
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timeT barStart = s->getBarStartForTime(t);
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t -= barStart;
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t = quantizeTime(t);
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t += barStart;
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nexti = i;
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++nexti;
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for (Segment::iterator j = i; s->isBeforeEndMarker(j); ++j) {
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if (!(*j)->isa(Note::EventType)) continue;
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timeT qt = (*j)->getAbsoluteTime();
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qt -= barStart;
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qt = quantizeTime(qt);
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qt += barStart;
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if (qt >= t + d) {
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d = qt - t;
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}
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if (qt > t) {
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break;
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}
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}
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if (t0 != t || d0 != d) {
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setToTarget(s, i, t, d);
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nexti = s->findTime(t + d);
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}
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}
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timeT
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LegatoQuantizer::quantizeTime(timeT t) const
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{
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if (m_unit != 0) {
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timeT low = (t / m_unit) * m_unit;
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timeT high = low + m_unit;
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t = ((high - t > t - low) ? low : high);
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}
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return t;
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}
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}
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