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Diffstat (limited to 'muse_qt4_evolution/muse/midiinport.cpp')
| -rw-r--r-- | muse_qt4_evolution/muse/midiinport.cpp | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/muse_qt4_evolution/muse/midiinport.cpp b/muse_qt4_evolution/muse/midiinport.cpp new file mode 100644 index 00000000..afe53876 --- /dev/null +++ b/muse_qt4_evolution/muse/midiinport.cpp @@ -0,0 +1,241 @@ +//============================================================================= +// MusE +// Linux Music Editor +// $Id:$ +// +// Copyright (C) 2002-2006 by Werner Schweer and others +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +//============================================================================= + +#include "song.h" +#include "midiplugin.h" +#include "midi.h" +#include "midictrl.h" +#include "al/xml.h" +#include "audiodev.h" +#include "audio.h" +#include "gconfig.h" +#include "midiinport.h" +#include "jackaudio.h" + +//--------------------------------------------------------- +// MidiInPort +//--------------------------------------------------------- + +MidiInPort::MidiInPort() + : MidiTrackBase() + { + _channels = 1; + for (int i = 0; i < MIDI_CHANNELS; ++i) + activity[i] = 0; + } + +//--------------------------------------------------------- +// MidiInPort +//--------------------------------------------------------- + +MidiInPort::~MidiInPort() + { + } + +//--------------------------------------------------------- +// setName +//--------------------------------------------------------- + +void MidiInPort::setName(const QString& s) + { + Track::setName(s); + if (!jackPort(0).isZero()) + audioDriver->setPortName(jackPort(), s); + } + +//--------------------------------------------------------- +// MidiInPort::write +//--------------------------------------------------------- + +void MidiInPort::write(Xml& xml) const + { + xml.stag("MidiInPort"); + MidiTrackBase::writeProperties(xml); + xml.etag("MidiInPort"); + } + +//--------------------------------------------------------- +// MidiInPort::read +//--------------------------------------------------------- + +void MidiInPort::read(QDomNode node) + { + while (!node.isNull()) { + QDomElement e = node.toElement(); + QString tag(e.tagName()); + if (MidiTrackBase::readProperties(node)) + printf("MusE:MidiInPort: unknown tag %s\n", tag.toLatin1().data()); + node = node.nextSibling(); + } + } + +//--------------------------------------------------------- +// midiReceived +// called from midiSeq context +//--------------------------------------------------------- + +void MidiInPort::eventReceived(jack_midi_event_t* ev) + { + MidiEvent event; + event.setB(0); + + // + // move all events 2*segmentSize into the future to get + // jitterfree playback + // + // cycle n-1 n n+1 + // -+----------+----------+----------+- + // ^ ^ ^ + // catch process play + // + const SeqTime* st = audio->seqTime(); + +// unsigned curFrame = st->startFrame() + segmentSize; + unsigned curFrame = st->lastFrameTime; + event.setTime(curFrame + ev->time); + + event.setChannel(*(ev->buffer) & 0xf); + int type = *(ev->buffer) & 0xf0; + int a = *(ev->buffer + 1) & 0x7f; + int b = *(ev->buffer + 2) & 0x7f; + event.setType(type); + switch(type) { + case ME_NOTEON: + case ME_NOTEOFF: + case ME_CONTROLLER: + event.setA(*(ev->buffer + 1)); + event.setB(*(ev->buffer + 2)); + break; + case ME_PROGRAM: + case ME_AFTERTOUCH: + event.setA(*(ev->buffer + 1)); + break; + + case ME_PITCHBEND: + event.setA(((b << 7) + a) - 8192); + break; + + case ME_SYSEX: + { + int type = *(ev->buffer) & 0xff; + switch(type) { + case ME_SYSEX: + event.setTime(0); // mark as used + event.setType(ME_SYSEX); + event.setData((unsigned char*)(ev->buffer + 1), + ev->size - 2); + break; + case ME_CLOCK: + case ME_SENSE: + break; + default: + printf("unknown event 0x%02x\n", type); + return; + } + } + return; + } + + if (midiInputTrace) { + printf("MidiInput<%s>: ", name().toLatin1().data()); + event.dump(); + } + // + // process midi filter pipeline and add event to + // _recordEvents + // + + MidiEventList il, ol; + il.insert(event); + pipeline()->apply(st->curTickPos, st->nextTickPos, &il, &ol); + + // + // update midi activity + // notify gui of new events + // + + for (iMidiEvent i = ol.begin(); i != ol.end(); ++i) { + triggerActivity(i->channel()); + song->putEvent(*i); + if (recordFifo.put(*i)) + printf("MusE: eventReceived(): fifo overflow\n"); + } + } + +//--------------------------------------------------------- +// afterProcess +// clear all recorded events after a process cycle +//--------------------------------------------------------- + +void MidiInPort::afterProcess() + { + while (tmpRecordCount--) + recordFifo.remove(); + } + +//--------------------------------------------------------- +// beforeProcess +// "freeze" fifo for this process cycle +//--------------------------------------------------------- + +void MidiInPort::beforeProcess() + { + if (!jackPort(0).isZero()) + audioDriver->collectMidiEvents(this, jackPort(0)); + tmpRecordCount = recordFifo.getSize(); + } + +//--------------------------------------------------------- +// getEvents +// called from jack process context +// This method can be called multiple times in a process +// cycle so we have to empty the fifo at +// "afterProcess()". +//--------------------------------------------------------- + +void MidiInPort::getEvents(unsigned, unsigned, int ch, MidiEventList* dst) + { + for (int i = 0; i < tmpRecordCount; ++i) { + const MidiEvent& ev = recordFifo.peek(i); + if (ch == -1 || (ev.channel() == ch)) + dst->insert(ev); + } + } + +//--------------------------------------------------------- +// checkActivity +//--------------------------------------------------------- + +bool MidiInPort::checkActivity(int channel) + { + if (activity[channel]) + --activity[channel]; + return activity[channel] != 0; + } + +//--------------------------------------------------------- +// triggerActivity +//--------------------------------------------------------- + +void MidiInPort::triggerActivity(int channel) + { + activity[channel] = config.guiRefresh / 5 + 1; // hold for >= 1/5 sec + } + |