1 files changed, 77 insertions, 0 deletions
diff --git a/src/gui/seqmanager/TempoSegmentMmapper.cpp b/src/gui/seqmanager/TempoSegmentMmapper.cpp
new file mode 100644
index 0000000..1c53922
--- /dev/null
+++ b/src/gui/seqmanager/TempoSegmentMmapper.cpp
@@ -0,0 +1,77 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+ 
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <glaurent@telegraph-road.org>,
+        Chris Cannam        <cannam@all-day-breakfast.com>,
+        Richard Bown        <richard.bown@ferventsoftware.com>
+ 
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+ 
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+ 
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+
+#include "TempoSegmentMmapper.h"
+
+#include "base/Event.h"
+#include "base/RealTime.h"
+#include "base/Segment.h"
+#include "base/TriggerSegment.h"
+#include "document/RosegardenGUIDoc.h"
+#include "SegmentMmapper.h"
+#include "sound/MappedEvent.h"
+#include "SpecialSegmentMmapper.h"
+#include <qstring.h>
+
+
+namespace Rosegarden
+{
+
+void TempoSegmentMmapper::dump()
+{
+    RealTime eventTime;
+
+    Composition& comp = m_doc->getComposition();
+    MappedEvent* bufPos = m_mmappedEventBuffer;
+
+    for (int i = 0; i < comp.getTempoChangeCount(); ++i) {
+
+        std::pair<timeT, tempoT> tempoChange = comp.getTempoChange(i);
+
+        eventTime = comp.getElapsedRealTime(tempoChange.first);
+        MappedEvent* mappedEvent = new (bufPos) MappedEvent();
+        mappedEvent->setType(MappedEvent::Tempo);
+        mappedEvent->setEventTime(eventTime);
+
+        // Nasty hack -- we use the instrument ID to pass through the
+        // raw tempo value, as it has the appropriate range (unlike
+        // e.g. tempo1 + tempo2).  These events are not actually used
+        // on the sequencer side yet, so this may change to something
+        // nicer at some point.
+        mappedEvent->setInstrument(tempoChange.second);
+
+        ++bufPos;
+    }
+
+    // Store the number of events at the start of the shared memory region
+    *(size_t *)m_mmappedRegion = (bufPos - m_mmappedEventBuffer);
+}
+
+size_t TempoSegmentMmapper::computeMmappedSize()
+{
+    return m_doc->getComposition().getTempoChangeCount() * sizeof(MappedEvent);
+}
+
+}