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//=============================================================================
// MuseScore
// Music Composition & Notation
//
// Copyright (C) 2002-2011 Werner Schweer
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2
// as published by the Free Software Foundation and appearing in
// the file LICENCE.GPL
//=============================================================================
#include "exportmidi.h"
#include "midi/midifile.h"
#include "libmscore/score.h"
#include "libmscore/part.h"
#include "libmscore/staff.h"
#include "libmscore/tempo.h"
#include "synthesizer/event.h"
#include "libmscore/sig.h"
#include "libmscore/key.h"
#include "libmscore/text.h"
#include "libmscore/measure.h"
#include "libmscore/repeatlist.h"
#include "preferences.h"
namespace Ms {
//---------------------------------------------------------
// writeHeader
//---------------------------------------------------------
void ExportMidi::writeHeader()
{
if (mf.tracks().isEmpty())
return;
MidiTrack &track = mf.tracks().front();
#if 0 // TODO
MeasureBase* measure = cs->first();
foreach (const Element* e, *measure->el()) {
if (e->type() == Element::TEXT) {
const Text* text = (const Text*)(e);
QString str = text->getText();
int len = str.length() + 1;
unsigned char* data = new unsigned char[len];
strcpy((char*)(data), str.toLatin1().data());
Event ev(ME_META);
ev.setOntime(0);
ev.setData(data);
ev.setLen(len);
switch (text->subtype()) {
case TEXT_TITLE:
ev.setMetaType(META_TITLE);
track.insert(ev);
break;
case TEXT_SUBTITLE:
ev.setMetaType(META_SUBTITLE);
track.insert(ev);
break;
case TEXT_COMPOSER:
ev.setMetaType(META_COMPOSER);
track.insert(ev);
break;
case TEXT_TRANSLATOR:
ev.setMetaType(META_TRANSLATOR);
track.insert(ev);
break;
case TEXT_POET:
ev.setMetaType(META_POET);
track.insert(ev);
break;
default:
break;
}
}
}
#endif
//--------------------------------------------
// write time signature
//--------------------------------------------
TimeSigMap* sigmap = cs->sigmap();
foreach(const RepeatSegment* rs, *cs->repeatList()) {
int startTick = rs->tick;
int endTick = startTick + rs->len;
int tickOffset = rs->utick - rs->tick;
auto bs = sigmap->lower_bound(startTick);
auto es = sigmap->lower_bound(endTick);
for (auto is = bs; is != es; ++is) {
SigEvent se = is->second;
unsigned char* data = new unsigned char[4];
Fraction ts(se.timesig());
data[0] = ts.numerator();
int n;
switch (ts.denominator()) {
case 1: n = 0; break;
case 2: n = 1; break;
case 4: n = 2; break;
case 8: n = 3; break;
case 16: n = 4; break;
case 32: n = 5; break;
default:
n = 2;
qDebug("ExportMidi: unknown time signature %s",
qPrintable(ts.print()));
break;
}
data[1] = n;
data[2] = 24;
data[3] = 8;
MidiEvent ev;
ev.setType(ME_META);
ev.setMetaType(META_TIME_SIGNATURE);
ev.setEData(data);
ev.setLen(4);
track.insert(is->first + tickOffset, ev);
}
}
//---------------------------------------------------
// write key signatures
// assume every staff corresponds to a midi track
//---------------------------------------------------
int staffIdx = 0;
for (auto &track: mf.tracks()) {
Staff* staff = cs->staff(staffIdx);
KeyList* keys = staff->keyList();
foreach(const RepeatSegment* rs, *cs->repeatList()) {
int startTick = rs->tick;
int endTick = startTick + rs->len;
int tickOffset = rs->utick - rs->tick;
auto sk = keys->lower_bound(startTick);
auto ek = keys->lower_bound(endTick);
bool keysigFound = false;
for (auto ik = sk; ik != ek; ++ik) {
keysigFound = true;
MidiEvent ev;
ev.setType(ME_META);
Key key = ik->second.key(); // -7 -- +7
ev.setMetaType(META_KEY_SIGNATURE);
ev.setLen(2);
unsigned char* data = new unsigned char[2];
data[0] = int(key);
data[1] = 0; // major
ev.setEData(data);
track.insert(ik->first + tickOffset, ev);
}
if (!keysigFound) {
MidiEvent ev;
ev.setType(ME_META);
int key = 0;
ev.setMetaType(META_KEY_SIGNATURE);
ev.setLen(2);
unsigned char* data = new unsigned char[2];
data[0] = key;
data[1] = 0; // major
ev.setEData(data);
track.insert(0, ev);
}
}
++staffIdx;
}
//--------------------------------------------
// write tempo changes
//--------------------------------------------
TempoMap* tempomap = cs->tempomap();
int relTempo = tempomap->relTempo();
foreach(const RepeatSegment* rs, *cs->repeatList()) {
int startTick = rs->tick;
int endTick = startTick + rs->len;
int tickOffset = rs->utick - rs->tick;
auto se = tempomap->lower_bound(startTick);
auto ee = tempomap->lower_bound(endTick);
for (auto it = se; it != ee; ++it) {
MidiEvent ev;
ev.setType(ME_META);
//
// compute midi tempo: microseconds / quarter note
//
int tempo = lrint((1.0 / (it->second.tempo * relTempo)) * 1000000.0);
ev.setMetaType(META_TEMPO);
ev.setLen(3);
unsigned char* data = new unsigned char[3];
data[0] = tempo >> 16;
data[1] = tempo >> 8;
data[2] = tempo;
ev.setEData(data);
track.insert(it->first + tickOffset, ev);
}
}
}
//---------------------------------------------------------
// write
// export midi file
// return false on error
//---------------------------------------------------------
bool ExportMidi::write(const QString& name, bool midiExpandRepeats)
{
f.setFileName(name);
if (!f.open(QIODevice::WriteOnly))
return false;
mf.setDivision(MScore::division);
mf.setFormat(1);
QList<MidiTrack>& tracks = mf.tracks();
for (int i = 0; i < cs->nstaves(); ++i)
tracks.append(MidiTrack());
cs->updateSwing();
cs->createPlayEvents();
cs->updateRepeatList(midiExpandRepeats);
writeHeader();
int staffIdx = 0;
for (auto &track: tracks) {
Staff* staff = cs->staff(staffIdx);
Part* part = staff->part();
track.setOutPort(part->midiPort());
track.setOutChannel(part->midiChannel());
// Render each staff only once
EventMap events;
cs->renderStaff(&events, staff);
cs->renderSpanners(&events, staffIdx);
// Pass throught the all instruments in the part
const InstrumentList* il = part->instruments();
for(auto j = il->begin(); j!= il->end(); j++) {
// Pass throught the all channels of the instrument
// "normal", "pizzicato", "tremolo" for Strings,
// "normal", "mute" for Trumpet
foreach(const Channel* ch, j->second->channel()) {
char port = part->score()->midiPort(ch->channel);
char channel = part->score()->midiChannel(ch->channel);
if (staff->isTop()) {
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_RESET_ALL_CTRL, 0));
// We need this to get the correct pitch of bends
// Hidden under preferences because some software
// crashes when receiving RPNs: https://musescore.org/en/node/37431
if (channel != 9 && preferences.midiExportRPNs) {
// set pitch bend sensitivity to 12 semitones:
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_LRPN, 0));
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_HRPN, 0));
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_HDATA, 12));
// reset fine tuning
/*track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_LRPN, 1));
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_HRPN, 0));
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_HDATA, 64));*/
// deactivate rpn
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_LRPN, 127));
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_HRPN, 127));
}
if (ch->program != -1)
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_PROGRAM, ch->program));
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_VOLUME, ch->volume));
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_PANPOT, ch->pan));
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_REVERB_SEND, ch->reverb));
track.insert(0, MidiEvent(ME_CONTROLLER, channel, CTRL_CHORUS_SEND, ch->chorus));
}
// Export port to MIDI META event
if (track.outPort() >= 0 && track.outPort() <= 127) {
MidiEvent ev;
ev.setType(ME_META);
ev.setMetaType(META_PORT_CHANGE);
ev.setLen(1);
unsigned char* data = new unsigned char[1];
data[0] = int(track.outPort());
ev.setEData(data);
track.insert(0, ev);
}
for (auto i = events.begin(); i != events.end(); ++i) {
NPlayEvent event(i->second);
char eventPort = cs->midiPort(event.channel());
char eventChannel = cs->midiChannel(event.channel());
if (port != eventPort || channel != eventChannel)
continue;
if (event.type() == ME_NOTEON) {
track.insert(i->first, MidiEvent(ME_NOTEON, channel,
event.pitch(), event.velo()));
}
else if (event.type() == ME_CONTROLLER) {
track.insert(i->first, MidiEvent(ME_CONTROLLER, channel,
event.controller(), event.value()));
}
else if(event.type() == ME_PITCHBEND) {
track.insert(i->first, MidiEvent(ME_PITCHBEND, channel,
event.dataA(), event.dataB()));
}
else {
qDebug("writeMidi: unknown midi event 0x%02x", event.type());
}
}
}
}
++staffIdx;
}
return !mf.write(&f);
}
}
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