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package com.sun.media.sound;

A standard indexed director who chooses performers by there keyfrom,keyto,velfrom,velto properties.
Author:Karl Helgason
/** * A standard indexed director who chooses performers * by there keyfrom,keyto,velfrom,velto properties. * * @author Karl Helgason */
public final class ModelStandardIndexedDirector implements ModelDirector { ModelPerformer[] performers; ModelDirectedPlayer player; boolean noteOnUsed = false; boolean noteOffUsed = false; // Variables needed for index byte[][] trantables; int[] counters; int[][] mat; public ModelStandardIndexedDirector(ModelPerformer[] performers, ModelDirectedPlayer player) { this.performers = performers; this.player = player; for (int i = 0; i < performers.length; i++) { ModelPerformer p = performers[i]; if (p.isReleaseTriggered()) { noteOffUsed = true; } else { noteOnUsed = true; } } buildindex(); } private int[] lookupIndex(int x, int y) { if ((x >= 0) && (x < 128) && (y >= 0) && (y < 128)) { int xt = trantables[0][x]; int yt = trantables[1][y]; if (xt != -1 && yt != -1) { return mat[xt + yt * counters[0]]; } } return null; } private int restrict(int value) { if(value < 0) return 0; if(value > 127) return 127; return value; } private void buildindex() { trantables = new byte[2][129]; counters = new int[trantables.length]; for (ModelPerformer performer : performers) { int keyFrom = performer.getKeyFrom(); int keyTo = performer.getKeyTo(); int velFrom = performer.getVelFrom(); int velTo = performer.getVelTo(); if (keyFrom > keyTo) continue; if (velFrom > velTo) continue; keyFrom = restrict(keyFrom); keyTo = restrict(keyTo); velFrom = restrict(velFrom); velTo = restrict(velTo); trantables[0][keyFrom] = 1; trantables[0][keyTo + 1] = 1; trantables[1][velFrom] = 1; trantables[1][velTo + 1] = 1; } for (int d = 0; d < trantables.length; d++) { byte[] trantable = trantables[d]; int transize = trantable.length; for (int i = transize - 1; i >= 0; i--) { if (trantable[i] == 1) { trantable[i] = -1; break; } trantable[i] = -1; } int counter = -1; for (int i = 0; i < transize; i++) { if (trantable[i] != 0) { counter++; if (trantable[i] == -1) break; } trantable[i] = (byte) counter; } counters[d] = counter; } mat = new int[counters[0] * counters[1]][]; int ix = 0; for (ModelPerformer performer : performers) { int keyFrom = performer.getKeyFrom(); int keyTo = performer.getKeyTo(); int velFrom = performer.getVelFrom(); int velTo = performer.getVelTo(); if (keyFrom > keyTo) continue; if (velFrom > velTo) continue; keyFrom = restrict(keyFrom); keyTo = restrict(keyTo); velFrom = restrict(velFrom); velTo = restrict(velTo); int x_from = trantables[0][keyFrom]; int x_to = trantables[0][keyTo + 1]; int y_from = trantables[1][velFrom]; int y_to = trantables[1][velTo + 1]; if (x_to == -1) x_to = counters[0]; if (y_to == -1) y_to = counters[1]; for (int y = y_from; y < y_to; y++) { int i = x_from + y * counters[0]; for (int x = x_from; x < x_to; x++) { int[] mprev = mat[i]; if (mprev == null) { mat[i] = new int[] { ix }; } else { int[] mnew = new int[mprev.length + 1]; mnew[mnew.length - 1] = ix; for (int k = 0; k < mprev.length; k++) mnew[k] = mprev[k]; mat[i] = mnew; } i++; } } ix++; } } public void close() { } public void noteOff(int noteNumber, int velocity) { if (!noteOffUsed) return; int[] plist = lookupIndex(noteNumber, velocity); if(plist == null) return; for (int i : plist) { ModelPerformer p = performers[i]; if (p.isReleaseTriggered()) { player.play(i, null); } } } public void noteOn(int noteNumber, int velocity) { if (!noteOnUsed) return; int[] plist = lookupIndex(noteNumber, velocity); if(plist == null) return; for (int i : plist) { ModelPerformer p = performers[i]; if (!p.isReleaseTriggered()) { player.play(i, null); } } } }