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public abstract class

ModelInstrument

extends Instrument
/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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package com.sun.media.sound;

import javax.sound.midi.Instrument;
import javax.sound.midi.MidiChannel;
import javax.sound.midi.Patch;
import javax.sound.midi.Soundbank;
import javax.sound.sampled.AudioFormat;

/**
 * The model instrument class.
 *
 * <p>The main methods to override are:<br>
 * getPerformer, getDirector, getChannelMixer.
 *
 * <p>Performers are used to define what voices which will
 * playback when using the instrument.<br>
 *
 * ChannelMixer is used to add channel-wide processing
 * on voices output or to define non-voice oriented instruments.<br>
 *
 * Director is used to change how the synthesizer
 * chooses what performers to play on midi events.
 *
 * @author Karl Helgason
 */

public abstract class ModelInstrument extends Instrument {

   
protected ModelInstrument(Soundbank soundbank, Patch patch, String name,
           
Class<?> dataClass) {
       
super(soundbank, patch, name, dataClass);
   
}

   
public ModelDirector getDirector(ModelPerformer[] performers,
           
MidiChannel channel, ModelDirectedPlayer player) {
       
return new ModelStandardIndexedDirector(performers, player);
   
}

   
public ModelPerformer[] getPerformers() {
       
return new ModelPerformer[0];
   
}

   
public ModelChannelMixer getChannelMixer(MidiChannel channel,
           
AudioFormat format) {
       
return null;
   
}

   
// Get General MIDI 2 Alias patch for this instrument.
   
public Patch getPatchAlias() {
       
Patch patch = getPatch();
       
int program = patch.getProgram();
       
int bank = patch.getBank();
       
if (bank != 0)
           
return patch;
       
boolean percussion = false;
       
if (getPatch() instanceof ModelPatch)
            percussion
= ((ModelPatch)getPatch()).isPercussion();
       
if (percussion)
           
return new Patch(0x78 << 7, program);
       
else
           
return new Patch(0x79 << 7, program);
   
}

   
// Return name of all the keys.
   
// This information is generated from ModelPerformer.getName()
   
// returned from getPerformers().
   
public String[] getKeys() {
       
String[] keys = new String[128];
       
for (ModelPerformer performer : getPerformers()) {
           
for (int k = performer.getKeyFrom(); k <= performer.getKeyTo(); k++) {
               
if (k >= 0 && k < 128 && keys[k] == null) {
                   
String name = performer.getName();
                   
if (name == null)
                        name
= "untitled";
                    keys
[k] = name;
               
}
           
}
       
}
       
return keys;
   
}

   
// Return what channels this instrument will probably response
   
// on General MIDI synthesizer.
   
public boolean[] getChannels() {
       
boolean percussion = false;
       
if (getPatch() instanceof ModelPatch)
            percussion
= ((ModelPatch)getPatch()).isPercussion();

       
// Check if instrument is percussion.
       
if (percussion) {
           
boolean[] ch = new boolean[16];
           
for (int i = 0; i < ch.length; i++)
                ch
[i] = false;
            ch
[9] = true;
           
return ch;
       
}

       
// Check if instrument uses General MIDI 2 default banks.
       
int bank = getPatch().getBank();
       
if (bank >> 7 == 0x78 || bank >> 7 == 0x79) {
           
boolean[] ch = new boolean[16];
           
for (int i = 0; i < ch.length; i++)
                ch
[i] = true;
           
return ch;
       
}

       
boolean[] ch = new boolean[16];
       
for (int i = 0; i < ch.length; i++)
            ch
[i] = true;
        ch
[9] = false;
       
return ch;
   
}
}