static void EchoAlgorithm(FunctionEvent& p, EventBuffer& midiOutput) {
static NoteEvent note; // temporary note before placing in buffer
// check if pausing
if (decaystates[p.getKey()] < 0.0) {
p.setOnTime(p.getOnTime() + p.getDur() + p.shortValue(14));
return;
}
// set the parameters for the output note:
note.setOnDur(t_time, p.getOffTime()); // off time holds dur
note.setVel(p.getVel());
note.setChan(p.getChan());
note.setKey(p.getKey());
// update the parameters for the function:
decaystates[p.getKey()] *= decayrate;
p.setVel((int)decaystates[p.getKey()]);
// if note is too quiet, end the note
if (p.getVel() <= 2) {
p.off(midiOutput);
decaystates[p.getKey()] = 0.0;
}
// next time includes a gap so that key can raise on keyboard
p.setOnTime(p.getOnTime() + p.getDur() + p.shortValue(14));
note.activate();
note.action(midiOutput); // start right now, avoiding any buffer delay
midiOutput.insert(note); // the note off message is being buffered
}
static void EnhanceFunction(FunctionEvent& p, EventBuffer& midiOutput) {
static NoteEvent note; // temporary note before placing in buffer
// set the parameters for the output note:
note.setOnDur(t_time, p.getOffTime()); // off time holds dur
note.setVel(p.getVel());
note.setChan(p.getChan());
note.setKey(p.getKey());
// if note is too quiet
if (p.getVel() <= 5) {
p.off(midiOutput);
}
// update the parameters for the function:
p.setKey(p.getKey()+p.shortValue(14));
p.setVel(p.getVel()-5);
p.setOnTime(p.getOnTime() + p.getDur()); // OffTime stores duration
note.activate();
note.action(midiOutput); // start right now, avoiding any buffer delay
midiOutput.insert(note); // the note off message is being buffered
// check wether to kill the algorithm or not:
// if note is off the range of the keyboard
if (p.getKey() > C8 || p.getKey() < A0) {
p.off(midiOutput);
}
}
void playgliss(int basenote, int loudness, int channel, int duration,
int distancee) {
static FunctionEvent tn; // a Temporary Note for copying into eventBuffer
// setting the fields of the function note
tn.shortValue(14) = distancee;
tn.setFunction(EnhanceFunction);
tn.setChannel(channel);
tn.setKeyno(basenote + distancee);
tn.setVelocity(loudness - 5);
tn.setStatus(EVENT_STATUS_ACTIVE);
// start time of function and the duration between calling it
tn.setOnDur(t_time, duration);
eventBuffer.insert(tn);
cout << "StartKey = " << basenote
<< "\tLoudness = " << loudness
<< "\tRate = " << duration
<< "\tDirection = " << distancee
<< endl;
}
void createDecay(int channel, int key, int duration, int velocity) {
static FunctionEvent tn; // temporary function for copying into eventBuffer
tn.shortValue(14) = gap; // gap between successive notes
tn.setFunction(EchoAlgorithm);
tn.setChannel(channel);
tn.setKeyno(key);
decaystates[key] = velocity * decayrate;
tn.setVelocity((int)decaystates[key]);
tn.setStatus(EVENT_STATUS_ACTIVE);
// start time of function and the duration between calling it
tn.setOnDur(t_time, duration);
eventBuffer.insert(tn);
cout << "Key= " << key
<< "\tDuration = " << duration + gap
<< "\tVelocity = " << velocity
<< endl;
}
