ADD speed

src/main/java/com/github/hhhzzzsss/songplayer/CommandProcessor.java

@@ -54,6 +54,7 @@ public class CommandProcessor {
 		commands.add(new songItemCommand());
 		commands.add(new testSongCommand());
 		commands.add(new pitchCommand());
+		commands.add(new speedCommand());
 
 		for (Command command : commands) {
 			commandMap.put(command.getName().toLowerCase(Locale.ROOT), command);
@@ -1095,6 +1096,33 @@ public class CommandProcessor {
 		}
 	}
 
+	private static class speedCommand extends Command {
+		public String getName() { return "speed"; }
+		public String[] getSyntax() { return new String[] { "<speed>" }; }
+		public String getDescription() { return "Sets the speed of the song"; }
+		public boolean processCommand(String args) {
+			if (args.length() == 0) return false;
+
+			try {
+				final Song currentSong = SongHandler.getInstance().currentSong;
+
+				long oldTime = -1;
+
+				if (currentSong != null) oldTime = currentSong.time;
+
+				SongHandler.getInstance().speed = Float.parseFloat(args);
+
+				if (currentSong != null) currentSong.setTime(oldTime);
+
+				SongPlayer.addChatMessage("§6Set the speed to §3" + args, true);
+			} catch (NumberFormatException e) {
+				return false;
+			}
+
+			return true;
+		}
+	}
+
 	public static CompletableFuture<Suggestions> handleSuggestions(String text, SuggestionsBuilder suggestionsBuilder) {
 		if (!text.contains(" ")) {
 			List<String> names = commandCompletions

src/main/java/com/github/hhhzzzsss/songplayer/playing/SongHandler.java

@@ -49,7 +49,9 @@ public class SongHandler {
     public boolean wasFlying = false;
     public GameMode originalGamemode = GameMode.CREATIVE;
 
+    // the purpose of these 2 variables is just because i want to nightcore
     public int pitch = 0;
+    public float speed = 1;
 
     boolean playlistChecked = false;
 

src/main/java/com/github/hhhzzzsss/songplayer/song/Song.java

@@ -1,5 +1,7 @@
 package com.github.hhhzzzsss.songplayer.song;
 
+import com.github.hhhzzzsss.songplayer.playing.SongHandler;
+
 import java.util.ArrayList;
 import java.util.Collections;
 
@@ -71,17 +73,17 @@ public class Song {
 	}
 
 	public void advanceTime() {
-		time = System.currentTimeMillis() - startTime;
+		time = (long) ((System.currentTimeMillis() - startTime) * SongHandler.getInstance().speed);
 	}
 
 	public boolean reachedNextNote() {
 		if (position < notes.size()) {
-			return notes.get(position).time <= time;
+			return notes.get(position).time <= time * SongHandler.getInstance().speed;
 		} else {
 			if (time > length && shouldLoop()) {
 				loop();
 				if (position < notes.size()) {
-					return notes.get(position).time <= time;
+					return notes.get(position).time <= time * SongHandler.getInstance().speed;
 				} else {
 					return false;
 				}