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25  package com.sun.media.sound;
26  
27  /**
28   * A standard indexed director who chooses performers
29   * by there keyfrom,keyto,velfrom,velto properties.
30   *
31   * @author Karl Helgason
32   */
33  public class ModelStandardIndexedDirector implements ModelDirector {
34  
35      ModelPerformer[] performers;
36      ModelDirectedPlayer player;
37      boolean noteOnUsed = false;
38      boolean noteOffUsed = false;
39  
40      // Variables needed for index
41      byte[][] trantables;
42      int[] counters;
43      int[][] mat;
44  
45      public ModelStandardIndexedDirector(ModelPerformer[] performers,
46              ModelDirectedPlayer player) {
47          this.performers = performers;
48          this.player = player;
49          for (int i = 0; i < performers.length; i++) {
50              ModelPerformer p = performers[i];
51              if (p.isReleaseTriggered()) {
52                  noteOffUsed = true;
53              } else {
54                  noteOnUsed = true;
55              }
56          }
57          buildindex();
58      }
59  
60      private int[] lookupIndex(int x, int y) {
61          if ((x >= 0) && (x < 128) && (y >= 0) && (y < 128)) {
62              int xt = trantables[0][x];
63              int yt = trantables[1][y];
64              if (xt != -1 && yt != -1) {
65                  return mat[xt + yt * counters[0]];
66              }
67          }
68          return null;
69      }
70  
71      private int restrict(int value) {
72          if(value < 0) return 0;
73          if(value > 127) return 127;
74          return value;
75      }
76  
77      private void buildindex() {
78          trantables = new byte[2][129];
79          counters = new int[trantables.length];
80          for (ModelPerformer performer : performers) {
81              int keyFrom = performer.getKeyFrom();
82              int keyTo = performer.getKeyTo();
83              int velFrom = performer.getVelFrom();
84              int velTo = performer.getVelTo();
85              if (keyFrom > keyTo) continue;
86              if (velFrom > velTo) continue;
87              keyFrom = restrict(keyFrom);
88              keyTo = restrict(keyTo);
89              velFrom = restrict(velFrom);
90              velTo = restrict(velTo);
91              trantables[0][keyFrom] = 1;
92              trantables[0][keyTo + 1] = 1;
93              trantables[1][velFrom] = 1;
94              trantables[1][velTo + 1] = 1;
95          }
96          for (int d = 0; d < trantables.length; d++) {
97              byte[] trantable = trantables[d];
98              int transize = trantable.length;
99              for (int i = transize - 1; i >= 0; i--) {
100                 if (trantable[i] == 1) {
101                     trantable[i] = -1;
102                     break;
103                 }
104                 trantable[i] = -1;
105             }
106             int counter = -1;
107             for (int i = 0; i < transize; i++) {
108                 if (trantable[i] != 0) {
109                     counter++;
110                     if (trantable[i] == -1)
111                         break;
112                 }
113                 trantable[i] = (byte) counter;
114             }
115             counters[d] = counter;
116         }
117         mat = new int[counters[0] * counters[1]][];
118         int ix = 0;
119         for (ModelPerformer performer : performers) {
120             int keyFrom = performer.getKeyFrom();
121             int keyTo = performer.getKeyTo();
122             int velFrom = performer.getVelFrom();
123             int velTo = performer.getVelTo();
124             if (keyFrom > keyTo) continue;
125             if (velFrom > velTo) continue;
126             keyFrom = restrict(keyFrom);
127             keyTo = restrict(keyTo);
128             velFrom = restrict(velFrom);
129             velTo = restrict(velTo);
130             int x_from = trantables[0][keyFrom];
131             int x_to = trantables[0][keyTo + 1];
132             int y_from = trantables[1][velFrom];
133             int y_to = trantables[1][velTo + 1];
134             if (x_to == -1)
135                 x_to = counters[0];
136             if (y_to == -1)
137                 y_to = counters[1];
138             for (int y = y_from; y < y_to; y++) {
139                 int i = x_from + y * counters[0];
140                 for (int x = x_from; x < x_to; x++) {
141                     int[] mprev = mat[i];
142                     if (mprev == null) {
143                         mat[i] = new int[] { ix };
144                     } else {
145                         int[] mnew = new int[mprev.length + 1];
146                         mnew[mnew.length - 1] = ix;
147                         for (int k = 0; k < mprev.length; k++)
148                             mnew[k] = mprev[k];
149                         mat[i] = mnew;
150                     }
151                     i++;
152                 }
153             }
154             ix++;
155         }
156     }
157 
158     public void close() {
159     }
160 
161     public void noteOff(int noteNumber, int velocity) {
162         if (!noteOffUsed)
163             return;
164         int[] plist = lookupIndex(noteNumber, velocity);
165         if(plist == null) return;
166         for (int i : plist) {
167             ModelPerformer p = performers[i];
168             if (p.isReleaseTriggered()) {
169                 player.play(i, null);
170             }
171         }
172     }
173 
174     public void noteOn(int noteNumber, int velocity) {
175         if (!noteOnUsed)
176             return;
177         int[] plist = lookupIndex(noteNumber, velocity);
178         if(plist == null) return;
179         for (int i : plist) {
180             ModelPerformer p = performers[i];
181             if (!p.isReleaseTriggered()) {
182                 player.play(i, null);
183             }
184         }
185     }
186 }