org/jsampler/DefaultSamplerChannelModel.java

/*
 *   JSampler - a java front-end for LinuxSampler
 *
 *   Copyright (C) 2005-2006 Grigor Iliev <grigor@grigoriliev.com>
 *
 *   This file is part of JSampler.
 *
 *   JSampler is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License version 2
 *   as published by the Free Software Foundation.
 *
 *   JSampler 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 for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with JSampler; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *   MA  02111-1307  USA
 */

package org.jsampler;

import java.util.Vector;

import javax.swing.SwingUtilities;

import net.sf.juife.Task;
import net.sf.juife.event.TaskEvent;
import net.sf.juife.event.TaskListener;

import org.jsampler.event.EffectSendsEvent;
import org.jsampler.event.EffectSendsListener;
import org.jsampler.event.SamplerChannelEvent;
import org.jsampler.event.SamplerChannelListener;

import org.jsampler.task.Channel;
import org.jsampler.task.Channel.LoadEngine;
import org.jsampler.task.Channel.LoadInstrument;
import org.jsampler.task.Channel.SetMidiInputChannel;
import org.jsampler.task.Channel.SetMidiInputDevice;
import org.jsampler.task.Channel.SetMidiInputPort;
import org.jsampler.task.Channel.SetMute;
import org.jsampler.task.Channel.SetSolo;
import org.jsampler.task.Channel.SetVolume;
import org.jsampler.task.Channel.UpdateFxSendInfo;
import org.jsampler.task.DuplicateChannels;

import org.linuxsampler.lscp.FxSend;
import org.linuxsampler.lscp.SamplerChannel;

import org.linuxsampler.lscp.event.MidiDataEvent;
import org.linuxsampler.lscp.event.MidiDataListener;


/**
 * This class provides default implementation of the <code>SamplerChannelModel</code> interface.
 * Note that all methods that begin with <code>setBackend</code> alter the settings
 * on the backend side.
 * @author Grigor Iliev
 */
public class DefaultSamplerChannelModel implements SamplerChannelModel {
        private SamplerChannel channel;
        private int streamCount = 0;
        private int voiceCount = 0;
        
        private final Vector<SamplerChannelListener> listeners =
                new Vector<SamplerChannelListener>();
        
        private final Vector<EffectSendsListener> fxListeners = new Vector<EffectSendsListener>();
        
        private final Vector<FxSend> fxSends = new Vector<FxSend>();
        
        private final Vector<MidiDataListener> midiListeners = new Vector<MidiDataListener>();
        
        /**
         * Creates a new instance of <code>DefaultSamplerChannelModel</code> using the
         * specified channel settings.
         * @param channel A non-null <code>SamplerChannel</code> instance containing the current
         * settings of the channel which will be represented by this sampler channel model.
         * @throws IllegalArgumentException If <code>channel</code> is <code>null</code>.
         */
        public DefaultSamplerChannelModel(SamplerChannel channel) {
                if(channel == null) throw new IllegalArgumentException("channel must be non null");
                this.channel = channel;
        }
        
        /**
         * Registers the specified listener for receiving event messages.
         * @param l The <code>SamplerChannelListener</code> to register.
         */
        public void
        addSamplerChannelListener(SamplerChannelListener l) { listeners.add(l); }
        
        /**
         * Removes the specified listener.
         * @param l The <code>SamplerChannelListener</code> to remove.
         */
        public void
        removeSamplerChannelListener(SamplerChannelListener l) { listeners.remove(l); }
        
        /**
         * Registers the specified listener for receiving event messages.
         * @param l The <code>EffectSendsListener</code> to register.
         */
        public void
        addEffectSendsListener(EffectSendsListener l) { fxListeners.add(l); }
        
        /**
         * Removes the specified listener.
         * @param l The <code>EffectSendsListener</code> to remove.
         */
        public void
        removeEffectSendsListener(EffectSendsListener l) { fxListeners.remove(l); }
        
        /**
         * Registers the specified listener to be notified when
         * MIDI events are sent to the channel.
         * @param l The <code>MidiDataListener</code> to register.
         */
        public void
        addMidiDataListener(MidiDataListener l) { midiListeners.add(l); }
        
        /**
         * Removes the specified listener.
         * @param l The <code>MidiDataListener</code> to remove.
         */
        public void
        removeMidiDataListener(MidiDataListener l) { midiListeners.remove(l); }
        
        /**
         * Gets the sampler channel number.
         * @return The sampler channel number or -1 if the sampler channel number is not set.
         */
        public int
        getChannelId() { return channel == null ? -1 : channel.getChannelId(); }
        
        /**
         * Gets the current settings of the sampler channel.
         * @return <code>SamplerChannel</code> instance containing
         * the current settings of the sampler channel.
         */
        public SamplerChannel
        getChannelInfo() { return channel; }
        
        /**
         * Sets the current settings of the sampler channel.
         * Note that this method does not changes the channel settings on
         * the backend. It is invoked just notify for channel settings' changes.
         * @param channel A <code>SamplerChannel</code> instance containing
         * the new settings for this sampler channel.
         * @throws IllegalArgumentException If <code>channel</code> is <code>null</code>.
         */
        public void
        setChannelInfo(SamplerChannel channel) {
                if(channel == null) throw new IllegalArgumentException("channel must be non null");
                if(this.channel == channel) return;
                
                this.channel = channel;
                fireSamplerChannelChanged();
        }
        
        /**
         * Gets the number of active disk streams.
         * @return The number of active disk streams.
         */
        public int
        getStreamCount() { return streamCount; }
        
        /**
         * Sets the number of active disk streams.
         * Note that this method does <b>not</b> alter the number
         * of active disk streams on the backend side.
         * @param count The new number of active disk streams.
         */
        public void
        setStreamCount(int count) {
                if(streamCount == count) return;
                
                streamCount = count;
                fireStreamCountChanged();
        }
        
        /**
         * Gets the number of active voices.
         * @return The number of active voices.
         */
        public int
        getVoiceCount() { return voiceCount; }
        
        /**
         * Sets the number of active voices.
         * Note that this method does <b>not</b> alter the number
         * of active voices on the backend side.
         * @param count The new number of active voices.
         */
        public void
        setVoiceCount(int count) {
                if(voiceCount == count) return;
                
                voiceCount = count;
                fireVoiceCountChanged();
        }
        
        /**
         * Schedules a new task for setting the sampler engine type to be used.
         * @param engine The name of the engine type to be used.
         */
        public void
        setBackendEngineType(String engine) {
                final LoadEngine loadEngine = new LoadEngine(engine, getChannelId());
                final SamplerChannelEvent event = new SamplerChannelEvent(this);
                
                loadEngine.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must notify for a channel
                                 * changes. This should be done to revert the old channel settings.
                                 */
                                if(loadEngine.doneWithErrors()) fireSamplerChannelChanged(event);
                        }
                });
                CC.getTaskQueue().add(loadEngine);
                
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /**
         * Schedules a new task for setting the mute mode of the channel. 
         * @param mute Specifies the mute mode. If <code>true</code> the channel is muted, else
         * the channel is unmuted.
         */
        public void
        setBackendMute(boolean mute) {
                final SetMute smc = new SetMute(getChannelId(), mute);
                final SamplerChannelEvent event = new SamplerChannelEvent(this);
                
                smc.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must notify for a channel
                                 * changes. This should be done to revert the old channel settings.
                                 */
                                if(smc.doneWithErrors()) fireSamplerChannelChanged(event);
                        }
                });
                CC.getTaskQueue().add(smc);
                
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /**
         * Schedules a new task for setting on the backend side the solo mode of the channel. 
         * @param solo Specifies the solo mode. If <code>true</code> the channel is soloed, else
         * the channel is unsoloed.
         */
        public void
        setBackendSolo(boolean solo) {
                final SetSolo ssc = new SetSolo(getChannelId(), solo);
                final SamplerChannelEvent event = new SamplerChannelEvent(this);
                
                ssc.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must notify for a channel
                                 * changes. This should be done to revert the old channel settings.
                                 */
                                if(ssc.doneWithErrors()) fireSamplerChannelChanged(event);
                        }
                });
                CC.getTaskQueue().add(ssc);
                
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /**
         * Schedules a new task for setting the channel volume on the backend side.
         * @param volume Specifies the new volume value.
         */
        public void
        setBackendVolume(float volume) {
                final SetVolume scv = new SetVolume(getChannelId(), volume);
                final SamplerChannelEvent event = new SamplerChannelEvent(this);
                
                scv.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must notify for a channel
                                 * changes. This should be done to revert the old channel settings.
                                 */
                                if(scv.doneWithErrors()) fireSamplerChannelChanged(event);
                        }
                });
                CC.getTaskQueue().add(scv);
                
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /**
         * Schedules a new task for setting on the backend side the MIDI input
         * device of the channel represented by this model. 
         * @param deviceId Specifies the numerical ID of the MIDI input device to be set.
         */
        public void
        setBackendMidiInputDevice(int deviceId) {
                final Task scmid = new SetMidiInputDevice(getChannelId(), deviceId);
                final SamplerChannelEvent event = new SamplerChannelEvent(this);
                
                scmid.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must notify for a channel
                                 * changes. This should be done to revert the old channel settings.
                                 */
                                if(scmid.doneWithErrors()) fireSamplerChannelChanged(event);
                        }
                });
                CC.getTaskQueue().add(scmid);
                
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /**
         * Schedules a new task for setting (on the backend side) the
         * MIDI input port of the channel represented by this model. 
         * @param port Specifies the number of the MIDI input port.
         */
        public void
        setBackendMidiInputPort(int port) {
                final Task scmip = new SetMidiInputPort(getChannelId(), port);
                final SamplerChannelEvent event = new SamplerChannelEvent(this);
                
                scmip.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must notify for a channel
                                 * changes. This should be done to revert the old channel settings.
                                 */
                                if(scmip.doneWithErrors()) fireSamplerChannelChanged(event);
                        }
                });
                CC.getTaskQueue().add(scmip);
                
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /**
         * Schedules a new task for setting (on the backend side) the MIDI channel
         * that the channel represented by this model should listen to. 
         * @param channel Specifies the MIDI channel that the channel
         * represented by this model should listen to.
         */
        public void
        setBackendMidiInputChannel(int channel) {
                final Task scmic = new SetMidiInputChannel(getChannelId(), channel);
                final SamplerChannelEvent event = new SamplerChannelEvent(this);
                
                scmic.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must notify for a channel
                                 * changes. This should be done to revert the old channel settings.
                                 */
                                if(scmic.doneWithErrors()) fireSamplerChannelChanged(event);
                        }
                });
                CC.getTaskQueue().add(scmic);
                
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /**
         * Schedules a new task for setting (on the backend side) the audio output
         * device of the channel represented by this model. 
         * @param deviceId Specifies the numerical ID of the audio output device to be set.
         */
        public void
        setBackendAudioOutputDevice(int deviceId) {
                final Task scaod = new Channel.SetAudioOutputDevice(getChannelId(), deviceId);
                final SamplerChannelEvent event = new SamplerChannelEvent(this);
                
                scaod.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must notify for a channel
                                 * changes. This should be done to revert the old channel settings.
                                 */
                                if(scaod.doneWithErrors()) fireSamplerChannelChanged(event);
                        }
                });
                CC.getTaskQueue().add(scaod);
                
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /**
         * Sets the destination of the destination of the specified audio channel.
         * @param audioSrc The numerical ID of the sampler channel's audio
         * output channel, which should be rerouted.
         * @param audioDst The audio channel of the selected audio output device
         * where <code>audioSrc</code> should be routed to.
         */
        public void
        setBackendAudioOutputChannel(int audioSrc, int audioDst) {
                final Task t;
                t = new Channel.SetAudioOutputChannel(getChannelId(), audioSrc, audioDst);
                final SamplerChannelEvent event = new SamplerChannelEvent(this);
                
                t.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must notify for a channel
                                 * changes. This should be done to revert the old channel settings.
                                 */
                                if(t.doneWithErrors()) fireSamplerChannelChanged(event);
                        }
                });
                CC.getTaskQueue().add(t);
        }
        
        /**
         * Schedules a new task for assigning (on the backend side) the
         * specified MIDI instrument map to this sampler channel. 
         * @param mapId Specify the numerical ID of the MIDI instrument
         * map that should be assigned to this sampler
         * channel or <code>-1</code> to remove the current map binding.
         */
        public void
        setBackendMidiInstrumentMap(int mapId) {
                final Task t = new Channel.SetMidiInstrumentMap(getChannelId(), mapId);
                final SamplerChannelEvent event = new SamplerChannelEvent(this);
                
                t.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must notify for a channel
                                 * changes. This should be done to revert the old channel settings.
                                 */
                                if(t.doneWithErrors()) fireSamplerChannelChanged(event);
                        }
                });
                CC.getTaskQueue().add(t);
        }
        
        /**
         * Schedules a new task for loading and assigning the specified instrument
         * to the sampler channel represented by this model.
         * @param filename The file name of the instrument to be loaded.
         * @param InstrIndex The index of the instrument in the instrument file to be loaded.
         */
        public void
        loadBackendInstrument(String filename, int InstrIndex) {
                final Task li = new LoadInstrument(filename, InstrIndex, getChannelId());
                CC.getTaskQueue().add(li);
                
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /** Schedules a new task for reseting the channel. */
        public void
        resetBackendChannel() {
                CC.getTaskQueue().add(new org.jsampler.task.Channel.Reset(getChannelId()));
                
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /** Schedules a new task for duplicating the channel. */
        public void
        duplicateBackendChannel() {
                CC.getTaskQueue().add(new DuplicateChannels(getChannelInfo()));
        }
        
        /**
         * Schedules a new task for adding a new effect send on the
         * backend side. The effect send will be actually added to this model
         * when the backend notifies for its creation.
         * @param midiCtrl Defines the MIDI controller, which
         * will be able alter the effect send level.
         */
        public void
        addBackendFxSend(int midiCtrl) {
                CC.getTaskQueue().add(new Channel.AddFxSend(getChannelId(), midiCtrl));
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /**
         * Schedules a new task for adding a new effect send on the
         * backend side. The effect send will be actually added to this model
         * when the backend notifies for its creation.
         * @param midiCtrl Defines the MIDI controller, which
         * will be able alter the effect send level.
         * @param name The name of the effect send entity.
         * The name does not have to be unique.
         */
        public void
        addBackendFxSend(int midiCtrl, String name) {
                CC.getTaskQueue().add(new Channel.AddFxSend(getChannelId(), midiCtrl, name));
                // We leave this event to be notified by the LinuxSampler notification system.
        }
        
        /**
         * Adds the specified effect send.
         * @param fxSend The effect send to be added.
         */
        public void
        addFxSend(FxSend fxSend) {
                fxSends.add(fxSend);
                fireFxSendAdded(fxSend);
        }
        
        /**
         * Schedules a new task for removing the specified effect send on the backend side.
         * @param fxSendId The ID of the effect send to remove.
         */
        public void
        removeBackendFxSend(int fxSendId) {
                CC.getTaskQueue().add(new Channel.RemoveFxSend(getChannelId(), fxSendId));
        }
        
        /**
         * Gets the effect send at the specified position.
         * @param index The index of the effect send to be returned.
         * @return The effect send at the specified position.
         */
        public FxSend
        getFxSend(int index) { return fxSends.get(index); }
        
        /**
         * Gets the effect send with the specified ID.
         * @param fxSendId The ID of the effect send to return.
         * @return The effect send with the specified ID or <code>null</code>
         * if there is no effect send with ID <code>fxSendId</code>.
         */
        public FxSend
        getFxSendById(int fxSendId) {
                for(FxSend fxs : fxSends) {
                        if(fxs.getFxSendId() == fxSendId) return fxs;
                }
                
                return null;
        }
        
        /**
         * Removes the effect send at the specified position.
         * @param index The position of the effect send to remove.
         * @return The removed effect send.
         */
        public FxSend
        removeFxSend(int index) {
                FxSend fxs = fxSends.remove(index);
                fireFxSendRemoved(fxs);
                return fxs;
        }
        
        /**
         * Removes the specified effect send.
         * @param fxSendId The ID of the effect send to remove.
         * @return <code>true</code> if the effect send is removed successfully, <code>false</code>
         * if the channel does not contain effect send with ID <code>fxSendId</code>.
         */
        public boolean
        removeFxSendById(int fxSendId) {
                for(int i = 0; i < fxSends.size(); i++) {
                        FxSend fxs = fxSends.get(i);
                        if(fxs.getFxSendId() == fxSendId) {
                                fxSends.remove(i);
                                fireFxSendRemoved(fxs);
                                return true;
                        }
                }
                
                return false;
        }
        
        /** Removes all effect sends from this channel. */
        public void
        removeAllFxSends() {
                for(int i = fxSends.size() - 1; i >= 0; i--) {
                        FxSend fxs = fxSends.get(i);
                        fxSends.removeElementAt(i);
                        fireFxSendRemoved(fxs);
                }
        }
        
        /**
         * Updates the specified effect send.
         * @param fxSend The effect send to update.
         */
        public void
        updateFxSend(FxSend fxSend) {
                for(int i = 0; i < fxSends.size(); i++) {
                        FxSend fxs = fxSends.get(i);
                        if(fxs.getFxSendId() == fxSend.getFxSendId()) {
                                fxSends.setElementAt(fxSend, i);
                                fireFxSendUpdated(fxSend);
                                return;
                        }
                }
        }
        
        /**
         * Gets the current number of effect sends.
         * @return The current number of effect sends.
         */
        public int
        getFxSendCount() { return fxSends.size(); }
        
        /**
         * Gets the current list of effect sends.
         * @return The current list of effect sends.
         */
        public FxSend[]
        getFxSends() { return fxSends.toArray(new FxSend[fxSends.size()]); }
        
        /**
         * Sets the name of the specified effect send.
         * @param fxSend The numerical ID of the effect send.
         * @param name The new name of the effect send entity.
         */
        public void
        setBackendFxSendName(final int fxSend, String name) {
                final Task t = new Channel.SetFxSendName(getChannelId(), fxSend, name);
                t.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) {
                                /*
                                 * Because with the invokation of the method the task is considered
                                 * to be done, if the task fails, we must update the settings.
                                 */
                                if(t.doneWithErrors()) {
                                        int id = getChannelId();
                                        CC.getTaskQueue().add(new UpdateFxSendInfo(id, fxSend));
                                }
                        }
                });
                CC.getTaskQueue().add(t);
        }
        
        /**
         * Sets the destination of an effect send's audio channel.
         * @param fxSend The numerical ID of the effect send entity to be rerouted.
         * @param audioSrc The numerical ID of the effect send's audio output channel,
         * which should be rerouted.
         * @param audioDst The audio channel of the selected audio output device
         * where <code>audioSrc</code> should be routed to.
         */
        public void
        setBackendFxSendAudioOutputChannel(int fxSend, int audioSrc, int audioDst) {
                Task t = new Channel.SetFxSendAudioOutputChannel (
                        getChannelId(), fxSend, audioSrc, audioDst
                );
                
                CC.getTaskQueue().add(t);
        }
        
        /**
         * Sets the MIDI controller of the specified effect send.
         * @param fxSend The numerical ID of the effect send.
         * @param midiCtrl The MIDI controller which shall be
         * able to modify the effect send's send level.
         */
        public void
        setBackendFxSendMidiController(int fxSend, int midiCtrl) {
                Task t = new Channel.SetFxSendMidiController(getChannelId(), fxSend, midiCtrl);
                CC.getTaskQueue().add(t);
        }
        
        /**
         * Sets the volume of the specified effect send.
         * @param fxSend The numerical ID of the effect
         * send, which volume should be changed.
         * @param level The new volume value.
         */
        public void
        setBackendFxSendLevel(int fxSend, float level) {
                CC.getTaskQueue().add(new Channel.SetFxSendLevel(getChannelId(), fxSend, level));
        }
        
        /**
         * Sends a MIDI data message to this sampler channel.
         */
        public void
        sendBackendMidiData(MidiDataEvent e) {
                sendBackendMidiData(e.getType(), e.getNote(), e.getVelocity());
        }
        
        /**
         * Sends a MIDI data message to this sampler channel.
         * @param type The type of MIDI message to send.
         * @param arg1 Depends on the message type.
         * @param arg2 Depends on the message type.
         */
        public void
        sendBackendMidiData(MidiDataEvent.Type type, int arg1, int arg2) {
                CC.getTaskQueue().add(new Channel.SendMidiMsg(getChannelId(), type, arg1, arg2));
        }
        
        /** Notifies listeners that the sampler channel settings has changed. */
        protected void
        fireSamplerChannelChanged() {
                final SamplerChannelEvent e = new SamplerChannelEvent(this);
                
                SwingUtilities.invokeLater(new Runnable() {
                        public void
                        run() { fireSamplerChannelChanged(e); }
                });
        }
        
        /** 
         * Notifies listeners that the sampler channel settings has changed.
         * This method should be invoked from the event-dispatching thread.
         */
        protected void
        fireSamplerChannelChanged(SamplerChannelEvent e) {
                CC.getSamplerModel().setModified(true);
                for(SamplerChannelListener l : listeners) l.channelChanged(e);
        }
        
        /** Notifies listeners that the number of active disk streams has changed. */
        protected void
        fireStreamCountChanged() {
                final SamplerChannelEvent e = new SamplerChannelEvent(this);
                
                SwingUtilities.invokeLater(new Runnable() {
                        public void
                        run() { fireStreamCountChanged(e); }
                });
        }
        
        /** 
         * Notifies listeners that the number of active disk streams has changed.
         * This method should be invoked from the event-dispatching thread.
         */
        protected void
        fireStreamCountChanged(SamplerChannelEvent e) {
                for(SamplerChannelListener l : listeners) l.streamCountChanged(e);
        }
        
        /** Notifies listeners that the number of active voices has changed. */
        protected void
        fireVoiceCountChanged() {
                final SamplerChannelEvent e = new SamplerChannelEvent(this);
                
                SwingUtilities.invokeLater(new Runnable() {
                        public void
                        run() { fireVoiceCountChanged(e); }
                });
        }
        
        /** 
         * Notifies listeners that the number of active voices has changed.
         * This method should be invoked from the event-dispatching thread.
         */
        protected void
        fireVoiceCountChanged(SamplerChannelEvent e) {
                for(SamplerChannelListener l : listeners) l.voiceCountChanged(e);
        }
        
        /**
         * Notifies listeners that the specified effect send has been added to the channel.
         */
        protected void
        fireFxSendAdded(FxSend fxSend) {
                final EffectSendsEvent e = new EffectSendsEvent(this, fxSend);
                
                SwingUtilities.invokeLater(new Runnable() {
                        public void
                        run() { fireFxSendAdded(e); }
                });
        }
        
        /** 
         * Notifies listeners that the specified effect send has been added to the channel.
         * This method should be invoked from the event-dispatching thread.
         */
        protected void
        fireFxSendAdded(EffectSendsEvent e) {
                CC.getSamplerModel().setModified(true);
                for(EffectSendsListener l : fxListeners) l.effectSendAdded(e);
        }
        
        /** Notifies listeners that the specified effect send has been removed. */
        protected void
        fireFxSendRemoved(FxSend fxSend) {
                final EffectSendsEvent e = new EffectSendsEvent(this, fxSend);
                
                SwingUtilities.invokeLater(new Runnable() {
                        public void
                        run() { fireFxSendRemoved(e); }
                });
        }
        
        /** 
         * Notifies listeners that the specified effect send has been removed.
         * This method should be invoked from the event-dispatching thread.
         */
        protected void
        fireFxSendRemoved(EffectSendsEvent e) {
                CC.getSamplerModel().setModified(true);
                for(EffectSendsListener l : fxListeners) l.effectSendRemoved(e);
        }
        
        /** Notifies listeners that the specified effect send has been updated. */
        protected void
        fireFxSendUpdated(FxSend fxSend) {
                final EffectSendsEvent e = new EffectSendsEvent(this, fxSend);
                
                SwingUtilities.invokeLater(new Runnable() {
                        public void
                        run() { fireFxSendUpdated(e); }
                });
        }
        
        /** 
         * Notifies listeners that the specified effect send has been updated.
         * This method should be invoked from the event-dispatching thread.
         */
        protected void
        fireFxSendUpdated(EffectSendsEvent e) {
                CC.getSamplerModel().setModified(true);
                for(EffectSendsListener l : fxListeners) l.effectSendChanged(e);
        }
        
        /** 
         * Notifies listeners that the specified effect send has been updated.
         * This method should be invoked from the event-dispatching thread.
         */
        protected void
        fireMidiDataEvent(MidiDataEvent e) {
                for(MidiDataListener l : midiListeners) l.midiDataArrived(e);
        }
}