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76 lines
2.4 KiB
76 lines
2.4 KiB
/*
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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 "TempoSegmentMmapper.h"
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#include "base/Event.h"
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#include "base/RealTime.h"
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#include "base/Segment.h"
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#include "base/TriggerSegment.h"
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#include "document/RosegardenGUIDoc.h"
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#include "SegmentMmapper.h"
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#include "sound/MappedEvent.h"
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#include "SpecialSegmentMmapper.h"
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#include <tqstring.h>
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namespace Rosegarden
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{
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void TempoSegmentMmapper::dump()
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{
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RealTime eventTime;
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Composition& comp = m_doc->getComposition();
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MappedEvent* bufPos = m_mmappedEventBuffer;
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for (int i = 0; i < comp.getTempoChangeCount(); ++i) {
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std::pair<timeT, tempoT> tempoChange = comp.getTempoChange(i);
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eventTime = comp.getElapsedRealTime(tempoChange.first);
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MappedEvent* mappedEvent = new (bufPos) MappedEvent();
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mappedEvent->setType(MappedEvent::Tempo);
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mappedEvent->setEventTime(eventTime);
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// Nasty hack -- we use the instrument ID to pass through the
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// raw tempo value, as it has the appropriate range (unlike
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// e.g. tempo1 + tempo2). These events are not actually used
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// on the sequencer side yet, so this may change to something
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// nicer at some point.
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mappedEvent->setInstrument(tempoChange.second);
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++bufPos;
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}
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// Store the number of events at the start of the shared memory region
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*(size_t *)m_mmappedRegion = (bufPos - m_mmappedEventBuffer);
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}
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size_t TempoSegmentMmapper::computeMmappedSize()
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{
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return m_doc->getComposition().getTempoChangeCount() * sizeof(MappedEvent);
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}
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}
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