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113 lines
2.9 KiB
C++
113 lines
2.9 KiB
C++
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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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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#ifndef _RG_SEGMENTMMAPPER_H_
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#define _RG_SEGMENTMMAPPER_H_
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#include <tqstring.h>
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#include "base/Event.h"
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namespace Rosegarden
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{
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class TriggerSegmentRec;
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class Segment;
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class RosegardenGUIDoc;
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class MappedEvent;
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class Event;
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class SegmentMmapper
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{
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friend class SegmentMmapperFactory;
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public:
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virtual ~SegmentMmapper();
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/**
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* refresh the object after the segment has been modified
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* returns true if size changed (and thus the sequencer
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* needs to be told about it
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*/
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bool refresh();
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TQString getFileName() { return m_fileName; }
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size_t getFileSize() const { return m_mmappedSize; }
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virtual unsigned int getSegmentRepeatCount();
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protected:
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SegmentMmapper(RosegardenGUIDoc*, Segment*,
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const TQString& fileName);
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virtual size_t computeMmappedSize();
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virtual size_t addMmappedSize(Segment *);
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/// actual setup, must be called after ctor, calls virtual methods
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virtual void init();
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/// set the size of the mmapped file
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void setFileSize(size_t);
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/// perform the mmap() of the file
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void doMmap();
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/// mremap() the file after a size change
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void remap(size_t newsize);
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/// dump all segment data in the file
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virtual void dump();
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void mergeTriggerSegment(Segment **target,
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Event *trigger,
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timeT performanceDuration,
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TriggerSegmentRec *rec);
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//--------------- Data members ---------------------------------
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RosegardenGUIDoc* m_doc;
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Segment* m_segment;
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TQString m_fileName;
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int m_fd;
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size_t m_mmappedSize;
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// The shared memory region starts with a size_t value
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// representing the number of MappedEvents that follow.
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void *m_mmappedRegion;
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// And this points to the next byte in the shared memory region.
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MappedEvent* m_mmappedEventBuffer;
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};
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//----------------------------------------
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}
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#endif
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