Added old abandoned KDE3 version of the RoseGarden MIDI tool

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/rosegarden@1097595 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 226 insertions, 0 deletions

diff --git a/src/gui/seqmanager/ControlBlockMmapper.cpp b/src/gui/seqmanager/ControlBlockMmapper.cpp
new file mode 100644
index 0000000..90ab6c2
--- /dev/null
+++ b/src/gui/seqmanager/ControlBlockMmapper.cpp
@@ -0,0 +1,226 @@
+/* -*- 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 "ControlBlockMmapper.h"
+#include "misc/Debug.h"
+
+#include <kstddirs.h>
+#include "misc/Strings.h"
+#include "base/Composition.h"
+#include "base/Exception.h"
+#include "base/MidiProgram.h"
+#include "base/Track.h"
+#include "document/RosegardenGUIDoc.h"
+#include "sound/ControlBlock.h"
+#include <kglobal.h>
+#include <qfile.h>
+#include <qstring.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <errno.h>
+
+namespace Rosegarden
+{
+
+ControlBlockMmapper::ControlBlockMmapper(RosegardenGUIDoc* doc)
+        : m_doc(doc),
+        m_fileName(createFileName()),
+        m_fd( -1),
+        m_mmappedBuffer(0),
+        m_mmappedSize(sizeof(ControlBlock)),
+        m_controlBlock(0)
+{
+    // just in case
+    QFile::remove
+        (m_fileName);
+
+    m_fd = ::open(m_fileName.latin1(), O_RDWR | O_CREAT | O_TRUNC,
+                  S_IRUSR | S_IWUSR);
+    if (m_fd < 0) {
+        SEQMAN_DEBUG << "ControlBlockMmapper : Couldn't open " << m_fileName
+        << endl;
+        throw Exception("Couldn't open " + qstrtostr(m_fileName));
+    }
+
+    setFileSize(m_mmappedSize);
+
+    //
+    // mmap() file for writing
+    //
+    m_mmappedBuffer = ::mmap(0, m_mmappedSize,
+                             PROT_READ | PROT_WRITE,
+                             MAP_SHARED, m_fd, 0);
+
+    if (m_mmappedBuffer == (void*) - 1) {
+        SEQMAN_DEBUG << QString("mmap failed : (%1) %2\n").arg(errno).arg(strerror(errno));
+        throw Exception("mmap failed");
+    }
+
+    SEQMAN_DEBUG << "ControlBlockMmapper : mmap size : " << m_mmappedSize
+    << " at " << (void*)m_mmappedBuffer << endl;
+
+    // Create new control block on file
+    initControlBlock();
+}
+
+ControlBlockMmapper::~ControlBlockMmapper()
+{
+    ::munmap(m_mmappedBuffer, m_mmappedSize);
+    ::close(m_fd);
+    QFile::remove
+        (m_fileName);
+}
+
+QString ControlBlockMmapper::createFileName()
+{
+    return KGlobal::dirs()->resourceDirs("tmp").last() + "/rosegarden_control_block";
+}
+
+void ControlBlockMmapper::updateTrackData(Track *t)
+{
+    m_controlBlock->updateTrackData(t);
+}
+
+void ControlBlockMmapper::setTrackDeleted(TrackId t)
+{
+    m_controlBlock->setTrackDeleted(t, true);
+}
+
+void ControlBlockMmapper::updateMidiFilters(MidiFilter thruFilter,
+        MidiFilter recordFilter)
+{
+    m_controlBlock->setThruFilter(thruFilter);
+    m_controlBlock->setRecordFilter(recordFilter);
+}
+
+void ControlBlockMmapper::updateMetronomeData(InstrumentId instId)
+{
+    m_controlBlock->setInstrumentForMetronome(instId);
+}
+
+void ControlBlockMmapper::updateMetronomeForPlayback()
+{
+    bool muted = !m_doc->getComposition().usePlayMetronome();
+    SEQMAN_DEBUG << "ControlBlockMmapper::updateMetronomeForPlayback: muted=" << muted << endl;
+    if (m_controlBlock->isMetronomeMuted() == muted)
+        return ;
+    m_controlBlock->setMetronomeMuted(muted);
+}
+
+void ControlBlockMmapper::updateMetronomeForRecord()
+{
+    bool muted = !m_doc->getComposition().useRecordMetronome();
+    SEQMAN_DEBUG << "ControlBlockMmapper::updateMetronomeForRecord: muted=" << muted << endl;
+    if (m_controlBlock->isMetronomeMuted() == muted)
+        return ;
+    m_controlBlock->setMetronomeMuted(muted);
+}
+
+bool ControlBlockMmapper::updateSoloData(bool solo,
+        TrackId selectedTrack)
+{
+    bool changed = false;
+
+    if (solo != m_controlBlock->isSolo()) {
+
+        changed = true;
+
+    } else if (solo &&
+               (selectedTrack != m_controlBlock->getSelectedTrack())) {
+
+        changed = true;
+    }
+
+    m_controlBlock->setSolo(solo);
+    m_controlBlock->setSelectedTrack(selectedTrack);
+
+    return changed;
+}
+
+void ControlBlockMmapper::setDocument(RosegardenGUIDoc* doc)
+{
+    SEQMAN_DEBUG << "ControlBlockMmapper::setDocument()\n";
+    m_doc = doc;
+    initControlBlock();
+}
+
+void ControlBlockMmapper::initControlBlock()
+{
+    SEQMAN_DEBUG << "ControlBlockMmapper::initControlBlock()\n";
+
+    m_controlBlock = new (m_mmappedBuffer) ControlBlock(m_doc->getComposition().getMaxTrackId());
+
+    Composition& comp = m_doc->getComposition();
+
+    for (Composition::trackiterator i = comp.getTracks().begin(); i != comp.getTracks().end(); ++i) {
+        Track* track = i->second;
+        if (track == 0)
+            continue;
+
+        m_controlBlock->updateTrackData(track);
+    }
+
+    m_controlBlock->setMetronomeMuted(!comp.usePlayMetronome());
+
+    m_controlBlock->setThruFilter(m_doc->getStudio().getMIDIThruFilter());
+    m_controlBlock->setRecordFilter(m_doc->getStudio().getMIDIRecordFilter());
+
+    ::msync(m_mmappedBuffer, m_mmappedSize, MS_ASYNC);
+}
+
+void ControlBlockMmapper::setFileSize(size_t size)
+{
+    SEQMAN_DEBUG << "ControlBlockMmapper : setting size of "
+    << m_fileName << " to " << size << endl;
+    // rewind
+    ::lseek(m_fd, 0, SEEK_SET);
+
+    //
+    // enlarge the file
+    // (seek() to wanted size, then write a byte)
+    //
+    if (::lseek(m_fd, size - 1, SEEK_SET) == -1) {
+        std::cerr << "WARNING: ControlBlockMmapper : Couldn't lseek in " << m_fileName
+        << " to " << size << std::endl;
+        throw Exception("lseek failed");
+    }
+
+    if (::write(m_fd, "\0", 1) != 1) {
+        std::cerr << "WARNING: ControlBlockMmapper : Couldn't write byte in  "
+        << m_fileName << std::endl;
+        throw Exception("write failed");
+    }
+
+}
+
+void
+ControlBlockMmapper::enableMIDIThruRouting(bool state)
+{
+    m_controlBlock->setMidiRoutingEnabled(state);
+}
+
+}