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