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
}
int startAlgorithm(TumbleParameters& p) {
static FunctionEvent tn; // a Temporary Note for copying into eventBuffer
int ploc = storeParameters(tparam, p);
if (ploc < 0) {
cout << "Warning: Parameter space is full. Not adding new algorithm"
<< endl;
return -1;
}
// setting the fields of the function note
tn.setFunction(TumbleNoteFunction);
tn.setChannel(channel);
tn.setKeyno(0);
tn.setVelocity(0);
tn.charValue(0) = (char)ploc; // store location of the parameters
tn.setStatus(EVENT_STATUS_ACTIVE);
tn.setOnTime(t_time + p.i[0] - anticipation);
// display the basic algorithm info
cout << "Tumble: Time: " << t_time << "\tStart = " << (int)p.current
<< "\tPattern = . ";
for (int i=1; i<p.n.getSize(); i++) {
cout << (int)p.n[i] << " ";
}
cout << "(" << (int)p.n[0] << ")";
cout << " ioi: " << p.i[0];
cout << endl;
return eventBuffer.insert(tn);
}
static void TumbleNoteFunction(FunctionEvent& p, EventBuffer& midiOutput) {
static NoteEvent note; // temporary note for placing in buffer
TumbleParameters& param = tparam[p.charValue(0)];
int newnote = limit(param.current + param.dir * param.n[param.pos], 0, 127);
// turn off algorithm if someone turned the algorithm off externally
// or if the current note is too large or too small.
if (param.active == 0 || newnote < A0 || newnote > C7) {
param.active = 0;
p.off(midiOutput);
return;
}
// set the parameters of the output note:
note.setOnDur(t_time, param.d[param.pos]); // off time holds dur
note.setVel(param.v[param.pos]);
note.setChan(p.getChan());
note.setKey(newnote);
note.activate();
note.action(midiOutput); // start right now, avoiding any buffer delay
midiOutput.insert(note); // store the note for turning off later
// update the parameters for the tumble algorithm
p.setOnTime(p.getOnTime() + param.i[param.pos]);
param.current = newnote;
param.pos++;
if (param.pos > param.n.getSize()) {
param.pos = 0;
}
}
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);
}
}
static void TrillAlgorithm(FunctionEvent& p, EventBuffer& midiOutput) {
static NoteEvent note; // temporary note before placing in buffer
int key1 = p.getKey(); // lower key of trill
int key2 = p.charValue(14); // upper key of trill
int state = p.charValue(15); // which note to play next
int starttime = p.intValue(10); // when trill was started
int i;
// turn off the trill if there is a note played inside the trill
int range1 = key1;
int range2 = key2;
if (range2 - range1 == 1) {
range1--;
range2++;
}
for (i=range1; i<=range2; i++) {
if (noteontimes[i] > starttime) {
p.off(midiOutput);
return;
}
}
// set the next note to play
int key = state ? key2 : key1;
state = !state;
p.charValue(15) = state;
// set the parameters for the output note:
note.setOnDur(t_time, p.getDur());
note.setVel(p.getVel());
note.setChan(p.getChan());
note.setKey(key);
// update the parameters for the gliss function:
p.setOnTime(p.getOnTime() + p.getDur());
int value = p.getVel() + velcorrection;
if (value < 100 && value > 3) {
p.setVel(value);
}
if (p.getDur() + trillcorrection > MINTRIGTIME) {
p.setDur(p.getDur() + trillcorrection);
}
note.activate();
note.action(midiOutput); // start right now, avoiding any buffer delay
midiOutput.insert(note); // the note off message is being buffered
}