void MidiMessageSequence::extractSysExMessages (MidiMessageSequence& destSequence) const
{
for (int i = 0; i < list.size(); ++i)
{
const MidiMessage& mm = list.getUnchecked(i)->message;
if (mm.isSysEx())
destSequence.addEvent (mm);
}
}
//==============================================================================
void MidiMessageSequence::extractMidiChannelMessages (const int channelNumberToExtract,
MidiMessageSequence& destSequence,
const bool alsoIncludeMetaEvents) const
{
for (int i = 0; i < list.size(); ++i)
{
const MidiMessage& mm = list.getUnchecked(i)->message;
if (mm.isForChannel (channelNumberToExtract) || (alsoIncludeMetaEvents && mm.isMetaEvent()))
destSequence.addEvent (mm);
}
}
MidiMessageSequence* MidiStochaster::createMelody(int minOctaveOffset, int maxOctaveOffset, double speedFactor) {
int currentOctaveOffset;
if (minOctaveOffset <= 0) {
currentOctaveOffset = 0;
} else {
currentOctaveOffset = minOctaveOffset;
}
int randInt1 = randomInt(100, 200);
double stopProbability = (double) randInt1 / (randInt1 + 1);
int randInt2 = randomInt(4, 10);
double octaveSwitchProbability = (double) randInt2 / (randInt2 + 1);
double currentTime = 0.0;
MidiMessageSequence* melody = new MidiMessageSequence(starter);
if (!goodSource) {
return melody;
}
while (randomDouble(0,1) < stopProbability) {
int notePitch = pitches->at(randomInt(0, pitches->size() - 1)) + 12 * currentOctaveOffset;
while (notePitch < 0) {
notePitch+=12;
currentOctaveOffset++;
minOctaveOffset++;
}
while (notePitch > 127) {
notePitch-=12;
currentOctaveOffset--;
maxOctaveOffset--;
}
int noteVelocity = randomInt(lowVelocity, highVelocity);
int noteLength = randomDouble(lowNoteLength, highNoteLength) * (1.0 / speedFactor);
int nextRestLength;
if (randomDouble(0,1) < negRestProbability) {
nextRestLength = randomDouble(lowNegRestLength, highNegRestLength) * 1.0 / speedFactor;
} else {
nextRestLength = randomDouble(lowRestLength, highRestLength) * 1.0 / speedFactor;
}
MidiMessage noteDown = MidiMessage::noteOn(1, notePitch, (uint8_t) noteVelocity);
noteDown.setTimeStamp(currentTime);
MidiMessage noteUp = MidiMessage::noteOff(1, notePitch);
noteUp.setTimeStamp(currentTime + noteLength);
melody->addEvent(noteDown);
melody->addEvent(noteUp);
melody->updateMatchedPairs();
currentTime += noteLength + nextRestLength;
if (randomDouble(0,1) > octaveSwitchProbability) {
currentOctaveOffset = randomInt(minOctaveOffset, maxOctaveOffset);
}
}
return melody;
}
