Sound issues fixes.

+ Fix when music player block is broken and it's sound doesn't fade out.
+ Fix fade in.

src/main/kotlin/com/enginemachiner/honkytones/Entity.kt

@@ -85,6 +85,8 @@ interface CanBeMuted {
 
         fun isMuted(entity: Entity): Boolean {
 
+            if ( entity.isRemoved ) return false
+
             if ( entity is MusicPlayerEntity ) {
 
                 val musicPlayer = world()!!.getBlockEntity( entity.blockPos )

src/main/kotlin/com/enginemachiner/honkytones/sound/AudioStreaming.kt

@@ -3,6 +3,7 @@ import MarkErrorInputStream
 import com.enginemachiner.honkytones.*
 import com.enginemachiner.honkytones.CanBeMuted.Companion.isMuted
 import com.enginemachiner.honkytones.blocks.musicplayer.MusicPlayer
+import com.enginemachiner.honkytones.blocks.musicplayer.MusicPlayerBlockEntity
 import com.squareup.okhttp.OkHttpClient
 import com.squareup.okhttp.Request
 import net.fabricmc.api.EnvType
@@ -103,9 +104,13 @@ class ExternalSound( private val musicPlayer: MusicPlayer ) : FadingSound("audio
 
     private var nbtVolume = 1f;     private var audioStream: AudioStream? = null
 
+    private var blockEntity: MusicPlayerBlockEntity? = null
+
     private fun init() {
 
-        entity = musicPlayer.blockEntity!!.entity
+        blockEntity = musicPlayer.blockEntity
+
+        entity = blockEntity!!.entity
 
         try { audioStream = getAudioStream() } catch (e: Exception) {
 
@@ -145,7 +150,7 @@ class ExternalSound( private val musicPlayer: MusicPlayer ) : FadingSound("audio
 
     }
 
-    override fun fadeOut() { if ( !musicPlayer.blockEntity!!.repeatOnPlay ) super.fadeOut() else stop() }
+    override fun fadeOut() { if ( !blockEntity!!.repeatOnPlay ) super.fadeOut() else stop() }
 
     override fun tick() {
 

src/main/kotlin/com/enginemachiner/honkytones/sound/Sound.kt

@@ -27,7 +27,7 @@ open class FadingSound( val path: String ) : MovingSoundInstance(
     var entity: Entity? = null;         var maxVolume = 1f
     private var fadeIn = false;         private var fadeOut = false
     var shouldNetwork = true;           var canReplay = true
-    private var timesStopped = 0;       private var lastVolume: Float? = null
+    private var timesStopped = 0;       private var volumeRate = maxVolume
 
     private var isPlaying = false;      protected var pos: Vec3d = Vec3d.ZERO
 
@@ -45,15 +45,13 @@ open class FadingSound( val path: String ) : MovingSoundInstance(
 
     private fun getRate(): Float {
 
-        if ( lastVolume == null ) lastVolume = volume
-
-        return 0.125f * lastVolume!! / ( timesStopped + 1 )
+        return 0.125f * volumeRate / ( timesStopped + 1 )
 
     }
 
     private fun fadeInTick() {
 
-        if ( !fadeIn ) return
+        if ( !fadeIn || fadeOut ) return
 
         val nextVolume = volume + getRate()
         if ( nextVolume < maxVolume ) volume = nextVolume else fadeIn = false
@@ -91,17 +89,20 @@ open class FadingSound( val path: String ) : MovingSoundInstance(
 
         getManager().stop(this);        volume = maxVolume
 
-        if ( !canReplay ) setDone();           lastVolume = null
+        if ( !canReplay ) setDone()
 
     }
 
-    fun fadeIn() { fadeIn = true;   volume = 0f }
+    open fun fadeIn() { fadeIn = true;   volume = 0f }
 
     open fun fadeOut() {
 
-        fadeOut = true;     if ( !canNetwork() || !shouldNetwork ) return
+        fadeOut = true;     volumeRate = volume
+
+        if ( !canNetwork() || !shouldNetwork ) return
 
         fadeOutOnClients()
+
     }
 
     fun setPitch(f: Float) { pitch = f }