findnotes.java

import java.util.LinkedList;
import com.cycling74.max.*;

public class findnotes extends MaxObject {
    float[] probs = new float[0];
    Atom[] atoms = new Atom[0];
    int[] notes = new int[0];
    int nudge = 0;

    findnotes() {
        declareInlets(new int[] { DataTypes.LIST, DataTypes.LIST });
        declareOutlets(new int[] { DataTypes.LIST });
    }

    protected void list(final Atom[] a) {
        final int idx = getInlet();
        switch (idx) {
            case 0:
                atoms = Atom.reverse(a);
                break;
            case 1:
                probs = Atom.toFloat(a);
                break;
        }
        bang();
    }

    public void setNudge(int n) {
        nudge = n;
        bang();
    }

    protected void bang() {
        if (atoms.length > 0) {
            final float[] floats = Atom.toFloat(Atom.rotate(atoms, -nudge));

            final LinkedList<Integer> noteList = new LinkedList<Integer>();
            for (int i = 0; i < floats.length; i++) {
                float v = floats[i];
                for (int j = 0; j < probs.length; j++) {
                    if ((v < 1.) ? (v < probs[j]) : (v == probs[j])) {
                        noteList.push(j);
                        break;
                    }
                }
            }
            notes = new int[noteList.size()];
            for (int i = 0; i < notes.length; i++) {
                notes[i] = noteList.get(i);
            }
            outlet(0, notes);
        }
    }
}