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Diffstat (limited to 'src/gui/seqmanager/ControlBlockMmapper.cpp')
| -rw-r--r-- | src/gui/seqmanager/ControlBlockMmapper.cpp | 226 |
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 <[email protected]>, + Chris Cannam <[email protected]>, + Richard Bown <[email protected]> + + 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); +} + +} |