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/* * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * 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). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */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;    }}