Add an option for setting Bedrock compression level (#2128)

connector/src/main/java/org/geysermc/connector/configuration/GeyserConfiguration.java

@@ -111,6 +111,8 @@ public interface GeyserConfiguration {
 
         String getServerName();
 
+        int getCompressionLevel();
+
         boolean isEnableProxyProtocol();
 
         List<String> getProxyProtocolWhitelistedIPs();

connector/src/main/java/org/geysermc/connector/configuration/GeyserJacksonConfiguration.java

@@ -147,6 +147,13 @@ public abstract class GeyserJacksonConfiguration implements GeyserConfiguration
         @JsonProperty("server-name")
         private String serverName = GeyserConnector.NAME;
 
+        @JsonProperty("compression-level")
+        private int compressionLevel = 6;
+
+        public int getCompressionLevel() {
+            return Math.max(-1, Math.min(compressionLevel, 9));
+        }
+
         @JsonProperty("enable-proxy-protocol")
         private boolean enableProxyProtocol = false;
 

connector/src/main/java/org/geysermc/connector/network/ConnectorServerEventHandler.java

@@ -159,6 +159,7 @@ public class ConnectorServerEventHandler implements BedrockServerEventHandler {
     @Override
     public void onSessionCreation(BedrockServerSession bedrockServerSession) {
         bedrockServerSession.setLogging(true);
+        bedrockServerSession.setCompressionLevel(connector.getConfig().getBedrock().getCompressionLevel());
         bedrockServerSession.setPacketHandler(new UpstreamPacketHandler(connector, new GeyserSession(connector, bedrockServerSession)));
         // Set the packet codec to default just in case we need to send disconnect packets.
         bedrockServerSession.setPacketCodec(BedrockProtocol.DEFAULT_BEDROCK_CODEC);

connector/src/main/resources/config.yml

@@ -23,6 +23,9 @@ bedrock:
   motd2: "Another Geyser server."
   # The Server Name that will be sent to Minecraft: Bedrock Edition clients. This is visible in both the pause menu and the settings menu.
   server-name: "Geyser"
+  # How much to compress network traffic to the Bedrock client. The higher the number, the more CPU usage used, but
+  # the smaller the bandwidth used. Does not have any effect below -1 or above 9. Set to -1 to disable.
+  compression-level: 6
   # Whether to enable PROXY protocol or not for clients. You DO NOT WANT this feature unless you run UDP reverse proxy
   # in front of your Geyser instance.
   enable-proxy-protocol: false