Track owning entity when sending sounds

This allows us to sync the position to the entity immediately, rather
than the sound jumping about.

Someone has set up rick-rolling pocket computers (<3 to whoever did
this), and the lag on them irritates me enough to fix this.

Fixes #1074

src/main/java/dan200/computercraft/client/sound/SpeakerInstance.java

@@ -6,11 +6,11 @@
 package dan200.computercraft.client.sound;
 
 import dan200.computercraft.ComputerCraft;
+import dan200.computercraft.shared.peripheral.speaker.SpeakerPosition;
 import io.netty.buffer.ByteBuf;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.audio.SoundHandler;
 import net.minecraft.util.ResourceLocation;
-import net.minecraft.util.math.vector.Vector3d;
 
 /**
  * An instance of a speaker, which is either playing a {@link DfpwmStream} stream or a normal sound.
@@ -44,7 +44,7 @@ public class SpeakerInstance
         }
     }
 
-    public void playAudio( Vector3d position, float volume )
+    public void playAudio( SpeakerPosition position, float volume )
     {
         SoundHandler soundManager = Minecraft.getInstance().getSoundManager();
 
@@ -63,7 +63,7 @@ public class SpeakerInstance
         }
     }
 
-    public void playSound( Vector3d position, ResourceLocation location, float volume, float pitch )
+    public void playSound( SpeakerPosition position, ResourceLocation location, float volume, float pitch )
     {
         SoundHandler soundManager = Minecraft.getInstance().getSoundManager();
         currentStream = null;
@@ -78,7 +78,7 @@ public class SpeakerInstance
         soundManager.play( sound );
     }
 
-    void setPosition( Vector3d position )
+    void setPosition( SpeakerPosition position )
     {
         if( sound != null ) sound.setPosition( position );
     }

src/main/java/dan200/computercraft/client/sound/SpeakerManager.java

@@ -5,7 +5,7 @@
  */
 package dan200.computercraft.client.sound;
 
-import net.minecraft.util.math.vector.Vector3d;
+import dan200.computercraft.shared.peripheral.speaker.SpeakerPosition;
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.client.event.sound.PlayStreamingSourceEvent;
 import net.minecraftforge.eventbus.api.SubscribeEvent;
@@ -48,7 +48,7 @@ public class SpeakerManager
         if( sound != null ) sound.stop();
     }
 
-    public static void moveSound( UUID source, Vector3d position )
+    public static void moveSound( UUID source, SpeakerPosition position )
     {
         SpeakerInstance sound = sounds.get( source );
         if( sound != null ) sound.setPosition( position );

src/main/java/dan200/computercraft/client/sound/SpeakerSound.java

@@ -5,13 +5,14 @@
  */
 package dan200.computercraft.client.sound;
 
+import dan200.computercraft.shared.peripheral.speaker.SpeakerPosition;
 import net.minecraft.client.audio.IAudioStream;
 import net.minecraft.client.audio.ITickableSound;
 import net.minecraft.client.audio.LocatableSound;
 import net.minecraft.client.audio.SoundSource;
+import net.minecraft.entity.Entity;
 import net.minecraft.util.ResourceLocation;
 import net.minecraft.util.SoundCategory;
-import net.minecraft.util.math.vector.Vector3d;
 
 import javax.annotation.Nullable;
 import java.util.concurrent.Executor;
@@ -22,7 +23,11 @@ public class SpeakerSound extends LocatableSound implements ITickableSound
     Executor executor;
     DfpwmStream stream;
 
-    SpeakerSound( ResourceLocation sound, DfpwmStream stream, Vector3d position, float volume, float pitch )
+    private Entity entity;
+
+    private boolean stopped = false;
+
+    SpeakerSound( ResourceLocation sound, DfpwmStream stream, SpeakerPosition position, float volume, float pitch )
     {
         super( sound, SoundCategory.RECORDS );
         setPosition( position );
@@ -32,22 +37,35 @@ public class SpeakerSound extends LocatableSound implements ITickableSound
         attenuation = AttenuationType.LINEAR;
     }
 
-    void setPosition( Vector3d position )
+    void setPosition( SpeakerPosition position )
     {
-        x = (float) position.x();
-        y = (float) position.y();
-        z = (float) position.z();
+        x = position.position().x;
+        y = position.position().y;
+        z = position.position().z;
+        entity = position.entity();
     }
 
     @Override
     public boolean isStopped()
     {
-        return false;
+        return stopped;
     }
 
     @Override
     public void tick()
     {
+        if( entity == null ) return;
+        if( !entity.isAlive() )
+        {
+            stopped = true;
+            looping = false;
+        }
+        else
+        {
+            x = entity.getX();
+            y = entity.getY();
+            z = entity.getZ();
+        }
     }
 
     @Nullable