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NoteBlockReceiver.java
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NoteBlockReceiver.java
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package com.denizenscript.denizen.utilities.midi;
import com.denizenscript.denizen.Denizen;
import com.denizenscript.denizen.objects.EntityTag;
import com.denizenscript.denizen.objects.LocationTag;
import com.denizenscript.denizencore.utilities.debugging.Debug;
import com.google.common.collect.Maps;
import org.bukkit.Bukkit;
import org.bukkit.Sound;
import javax.sound.midi.*;
import java.util.List;
import java.util.Map;
/**
* Midi Receiver for processing note events.
*
* @author authorblues, patched by mcmonkey
*/
public class NoteBlockReceiver implements Receiver, MetaEventListener {
public float VOLUME_RANGE = 10.0f;
private List<EntityTag> entities;
private LocationTag location;
private Map<Integer, Integer> channelPatches;
public String key;
public Sequencer sequencer;
public boolean closing = false;
public NoteBlockReceiver(List<EntityTag> entities, String _Key) {
this.entities = entities;
this.location = null;
this.channelPatches = Maps.newHashMap();
this.key = _Key;
}
public NoteBlockReceiver(LocationTag location, String _Key) {
this.entities = null;
this.location = location;
this.channelPatches = Maps.newHashMap();
this.key = _Key;
}
public void setSequencer(Sequencer sequencer) {
this.sequencer = sequencer;
}
@Override
public void meta(MetaMessage meta) {
if (meta.getType() == 47) { // Track completion
close();
}
}
@Override
public void send(MidiMessage m, long time) {
if (closing) {
return;
}
if (m instanceof ShortMessage) {
ShortMessage smessage = (ShortMessage) m;
int chan = smessage.getChannel();
switch (smessage.getCommand()) {
case ShortMessage.PROGRAM_CHANGE:
int patch = smessage.getData1();
channelPatches.put(chan, patch);
break;
case ShortMessage.NOTE_ON:
this.playNote(smessage);
break;
case ShortMessage.NOTE_OFF:
break;
case ShortMessage.STOP:
close();
break;
}
}
}
public void playNote(ShortMessage message) {
int channel = message.getChannel();
// If this is a percussion channel, return
if (channel == 9) {
return;
}
if (channelPatches == null) {
Debug.echoError("Trying to play notes on closed midi NoteBlockReceiver!");
return;
}
// get the correct instrument
Integer patch = channelPatches.get(channel);
// get pitch and volume from the midi message
float pitch = (float) ToneUtil.midiToPitch(message);
float volume = VOLUME_RANGE * (message.getData2() / 127.0f);
Sound instrument = patch == null ? SoundHelper.defaultMidiInstrument : SoundHelper.getMidiInstrumentFromPatch(patch);
Runnable actualPlay = () -> {
if (location != null) {
location.getWorld().playSound(location, instrument, volume, pitch);
}
else if (entities != null && !entities.isEmpty()) {
for (int i = 0; i < entities.size(); i++) {
EntityTag entity = entities.get(i);
if (entity.isSpawned()) {
if (entity.isPlayer()) {
SoundHelper.playSound(entity.getPlayer(), entity.getLocation(), instrument, volume, pitch, "RECORDS");
}
else {
SoundHelper.playSound(null, entity.getLocation(), instrument, volume, pitch, "RECORDS");
}
}
else {
entities.remove(i);
i--;
}
}
}
else {
this.close();
}
};
if (Bukkit.isPrimaryThread()) {
actualPlay.run();
}
else {
Bukkit.getScheduler().scheduleSyncDelayedTask(Denizen.getInstance(), actualPlay);
}
}
public Runnable onFinish = null;
@Override
public void close() {
if (closing) {
return;
}
closing = true;
Bukkit.getScheduler().scheduleSyncDelayedTask(Denizen.getInstance(), () -> {
try {
MidiUtil.receivers.remove(key);
if (sequencer != null) {
sequencer.close();
sequencer = null;
}
channelPatches.clear();
channelPatches = null;
entities = null;
location = null;
if (onFinish != null) {
onFinish.run();
}
}
catch (Throwable ex) {
Debug.echoError(ex);
}
}, 1);
}
}