void mainloopalgorithms(void) {
// 1. check to see if we are in a new measure and update the
// metronome accordingly. If in 4/4, then the metronome will
// be guarenteed to be between 0 and 3.99999 after the following
// code is run. The update will make sure that the metronome remains
// synced exactly in time with the absolute beat. (Useful for
// polyphony, not really necessary in monophonic cases).
if (metronome.expired() >= meter) {
metronome.update(meter);
}
// 2. Determine the current beat of the meter.
// We will want to play automated chords on beats one and three.
beatfraction = metronome.getPeriodCount();
beat = (int)beatfraction + 1;
beatfraction -= beat - 1;
// 3. Process the incoming MIDI note messages (if any), keeping track
// of the last note, and whether it is currently on or off.
while (synth.getNoteCount() > 0) {
notemessage = synth.extractNote();
if (notemessage.getP2() != 0) {
note = notemessage.getP1();
notestates[note] = 1;
} else {
notestates[notemessage.getP1()] = 0;
}
}
// 4. Determine the position in time in the current beat.
// There are two beat-parts which are called states:
// state == 0: we are at the start of the beat and may need to
// choose a new chord.
// state == 1: we are past the maximum wait time for a chord decision
// Also, check to see if the state has changed from 0 to 1 or 1 to 0.
oldstate = state;
state = beatfraction < maxwait ? 0 : 1;
stateChange = (state != oldstate);
// 5. Check to see if a chord needs to be played.
if (stateChange && state == 0) {
playMetronome(beat);
if (chordBeat(beat, meter)) {
notescan = 1;
} else {
playChord(currentnote, OFF);
}
}
if (notescan && notestates[note]) { // if note played in beat window
currentnote = note;
playChord(currentnote, ON);
notescan = 0;
} else if (notescan && state == 1) { // if too late for a new note
playChord(currentnote, ON);
notescan = 0;
}
}
void mainloopalgorithms(void) {
if (comparestate && notetimer.expired()) {
if (notetimer.expired() > 2) {
notetimer.reset();
} else {
notetimer.update();
}
notestate = !notestate;
if (notestate == 1 || notestate == -1) {
synth.play(0, note, 64);
data = 0x90; sentout.insert(data);
data = note; sentout.insert(data);
data = 64; sentout.insert(data);
} else {
synth.play(0, note, 0);
data = 0x90; sentout.insert(data);
data = note; sentout.insert(data);
data = 0; sentout.insert(data);
note += step * direction;
if (note > highestnote) {
note = lowestnote;
}
if (note < lowestnote) {
note = highestnote;
}
}
}
if (midiinput.getCount() > 0) {
message = midiinput.extract();
receivedin.insert(message.p0());
receivedin.insert(message.p1());
receivedin.insert(message.p2());
// check that the messages are identical
if (receivedin.getCount() < 3) {
cout << "Error: not enough received data" << endl;
} else {
checkin[0] = receivedin.extract();
checkin[1] = receivedin.extract();
checkin[2] = receivedin.extract();
}
if (sentout.getCount() < 3) {
cout << "Error: not enough sent data" << endl;
} else {
checkout[0] = sentout.extract();
checkout[1] = sentout.extract();
checkout[2] = sentout.extract();
}
if ((checkout[0] != checkin[0]) || (checkout[1] != checkin[1]) ||
(checkout[2] != checkin[2])) {
synth.rawsend(0xaa, 0x7f, 0x00);
cout << "Error "
<< "output was = (" << hex << (int)checkout[0] << ") "
<< dec << (int)checkout[1] << " "
<< dec << (int)checkout[2] << "\tbut input is = ("
<< hex << (int)checkin[0] << ") "
<< dec << (int)checkin[1] << " "
<< dec << (int)checkin[2] << " "
<< endl;
// assume that a note message was missed.
if (sentout.getCount() < 3) {
cout << "Error: not enough sent data during error" << endl;
} else {
checkout[0] = sentout.extract();
checkout[1] = sentout.extract();
checkout[2] = sentout.extract();
}
stop();
cout << "Press space to restart testing, "
"or press 'S' to silence synth" << endl;
}
}
}