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/*
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Rosegarden
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A MIDI and audio 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 <richard.bown@ferventsoftware.com>
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The moral rights of Guillaume Laurent, Chris Cannam, and Richard
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Bown to claim authorship of this work have been asserted.
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Other copyrights also apply to some parts of this work. Please
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see the AUTHORS file and individual file headers for details.
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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 "SegmentRescaleCommand.h"
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#include "misc/Strings.h"
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#include "base/Event.h"
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#include "base/Composition.h"
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#include "base/NotationTypes.h"
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#include "base/Segment.h"
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#include <tqstring.h>
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namespace Rosegarden
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{
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SegmentRescaleCommand::SegmentRescaleCommand(Segment *s,
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int multiplier,
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int divisor) :
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KNamedCommand(getGlobalName()),
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m_segment(s),
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m_newSegment(0),
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m_startTimeGiven(false),
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m_startTime(s->getStartTime()),
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m_multiplier(multiplier),
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m_divisor(divisor),
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m_detached(false)
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{
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// nothing
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}
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SegmentRescaleCommand::SegmentRescaleCommand(Segment *s,
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int multiplier,
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int divisor,
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timeT st) :
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KNamedCommand(getGlobalName()),
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m_segment(s),
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m_newSegment(0),
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m_startTimeGiven(true),
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m_startTime(st),
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m_multiplier(multiplier),
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m_divisor(divisor),
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m_detached(false)
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{
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// nothing
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}
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SegmentRescaleCommand::~SegmentRescaleCommand()
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{
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if (m_detached) {
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delete m_segment;
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} else {
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delete m_newSegment;
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}
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}
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timeT
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SegmentRescaleCommand::rescale(timeT t)
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{
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// avoid overflows by using doubles
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double d = t;
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d *= m_multiplier;
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d /= m_divisor;
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d += 0.5;
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return (timeT)d;
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}
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void
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SegmentRescaleCommand::execute()
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{
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timeT startTime = m_segment->getStartTime();
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if (m_startTimeGiven) startTime = m_startTime;
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if (!m_newSegment) {
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m_newSegment = new Segment();
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m_newSegment->setTrack(m_segment->getTrack());
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TQString oldLabel = strtoqstr(m_segment->getLabel());
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if (oldLabel.endsWith(i18n("(rescaled)"))) {
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m_newSegment->setLabel(m_segment->getLabel());
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} else {
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m_newSegment->setLabel(qstrtostr(i18n("%1 (rescaled)").arg
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(oldLabel)));
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}
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m_newSegment->setColourIndex(m_segment->getColourIndex());
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for (Segment::iterator i = m_segment->begin();
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m_segment->isBeforeEndMarker(i); ++i) {
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if ((*i)->isa(Note::EventRestType))
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continue;
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timeT dt = (*i)->getAbsoluteTime() - startTime;
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timeT duration = (*i)->getDuration();
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//!!! use doubles for this calculation where necessary
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m_newSegment->insert
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(new Event(**i,
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startTime + rescale(dt),
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rescale(duration)));
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}
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}
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m_segment->getComposition()->addSegment(m_newSegment);
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m_segment->getComposition()->detachSegment(m_segment);
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m_newSegment->normalizeRests(m_newSegment->getStartTime(),
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m_newSegment->getEndTime());
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m_newSegment->setEndMarkerTime
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(startTime + rescale(m_segment->getEndMarkerTime() -
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m_segment->getStartTime()));
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m_detached = true;
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}
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void
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SegmentRescaleCommand::unexecute()
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{
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m_newSegment->getComposition()->addSegment(m_segment);
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m_newSegment->getComposition()->detachSegment(m_newSegment);
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m_detached = false;
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}
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}
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