void MidiFile::writeEvent(const MidiEvent& event)
{
switch(event.type()) {
case ME_NOTEON:
writeStatus(ME_NOTEON, event.channel());
put(event.pitch());
put(event.velo());
break;
case ME_NOTEOFF:
writeStatus(ME_NOTEOFF, event.channel());
put(event.pitch());
put(event.velo());
break;
case ME_CONTROLLER:
switch(event.controller()) {
case CTRL_PROGRAM:
writeStatus(ME_PROGRAM, event.channel());
put(event.value() & 0x7f);
break;
case CTRL_PITCH:
{
writeStatus(ME_PITCHBEND, event.channel());
int v = event.value() + 8192;
put(v & 0x7f);
put((v >> 7) & 0x7f);
}
break;
case CTRL_PRESS:
writeStatus(ME_AFTERTOUCH, event.channel());
put(event.value() & 0x7f);
break;
default:
writeStatus(ME_CONTROLLER, event.channel());
put(event.controller());
put(event.value() & 0x7f);
break;
}
break;
case ME_META:
put(ME_META);
put(event.metaType());
putvl(event.len());
write(event.edata(), event.len());
resetRunningStatus(); // really ?!
break;
case ME_SYSEX:
put(ME_SYSEX);
putvl(event.len() + 1); // including 0xf7
write(event.edata(), event.len());
put(ME_ENDSYSEX);
resetRunningStatus();
break;
}
}
bool MidiFile::readTrack()
{
char tmp[4];
read(tmp, 4);
if (memcmp(tmp, "MTrk", 4))
throw(QString("bad midifile: MTrk expected"));
int len = readLong(); // len
qint64 endPos = curPos + len;
status = -1;
sstatus = -1; // running status, will not be reset on meta or sysex
click = 0;
_tracks.push_back(MidiTrack());
int port = 0;
_tracks.back().setOutPort(port);
_tracks.back().setOutChannel(-1);
for (;;) {
MidiEvent event;
if (!readEvent(&event))
return true;
// check for end of track:
if ((event.type() == ME_META) && (event.metaType() == META_EOT))
break;
_tracks.back().insert(click, event);
}
if (curPos != endPos) {
qWarning("bad track len: %lld != %lld, %lld bytes too much\n", endPos, curPos, endPos - curPos);
if (curPos < endPos) {
qWarning(" skip %lld\n", endPos-curPos);
skip(endPos - curPos);
}
}
return false;
}
bool isLyricEvent(const MidiEvent &e)
{
return e.type() == ME_META && (e.metaType() == META_TEXT
|| e.metaType() == META_LYRIC);
}
void MTrack::processMeta(int tick, const MidiEvent& mm)
{
if (!staff) {
qDebug("processMeta: no staff");
return;
}
const uchar* data = (uchar*)mm.edata();
int staffIdx = staff->idx();
Score* cs = staff->score();
switch (mm.metaType()) {
case META_TEXT:
case META_LYRIC: {
QString s((char*)data);
cs->addLyrics(tick, staffIdx, s);
}
break;
case META_TRACK_NAME:
name = (const char*)data;
break;
case META_TEMPO:
{
unsigned tempo = data[2] + (data[1] << 8) + (data[0] <<16);
double t = 1000000.0 / double(tempo);
cs->setTempo(tick, t);
// TODO: create TempoText
}
break;
case META_KEY_SIGNATURE:
{
int key = ((const char*)data)[0];
if (key < -7 || key > 7) {
qDebug("ImportMidi: illegal key %d", key);
break;
}
KeySigEvent ks;
ks.setAccidentalType(key);
(*staff->keymap())[tick] = ks;
hasKey = true;
}
break;
case META_COMPOSER: // mscore extension
case META_POET:
case META_TRANSLATOR:
case META_SUBTITLE:
case META_TITLE:
{
Text* text = new Text(cs);
switch(mm.metaType()) {
case META_COMPOSER:
text->setTextStyleType(TEXT_STYLE_COMPOSER);
break;
case META_TRANSLATOR:
text->setTextStyleType(TEXT_STYLE_TRANSLATOR);
break;
case META_POET:
text->setTextStyleType(TEXT_STYLE_POET);
break;
case META_SUBTITLE:
text->setTextStyleType(TEXT_STYLE_SUBTITLE);
break;
case META_TITLE:
text->setTextStyleType(TEXT_STYLE_TITLE);
break;
}
text->setText((const char*)(mm.edata()));
MeasureBase* measure = cs->first();
if (measure->type() != Element::VBOX) {
measure = new VBox(cs);
measure->setTick(0);
measure->setNext(cs->first());
cs->add(measure);
}
measure->add(text);
}
break;
case META_COPYRIGHT:
cs->setMetaTag("Copyright", QString((const char*)(mm.edata())));
break;
case META_TIME_SIGNATURE:
qDebug("midi: meta timesig: %d, division %d", tick, MScore::division);
cs->sigmap()->add(tick, Fraction(data[0], 1 << data[1]));
break;
default:
if (MScore::debugMode)
qDebug("unknown meta type 0x%02x", mm.metaType());
break;
}
}