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Code Issues Releases Activity

优化visual_block_state的编解码器以节约带宽

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jhqwqmc
2025-10-28 10:37:26 +08:00
parent ae972ddb2c
commit cd533b2635
1 changed files with 65 additions and 2 deletions
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67
bukkit/src/main/java/net/momirealms/craftengine/bukkit/plugin/network/payload/protocol/VisualBlockStatePacket.java
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@@ -1,5 +1,6 @@
package net.momirealms.craftengine.bukkit.plugin.network.payload.protocol;
import io.netty.handler.codec.DecoderException;
import net.momirealms.craftengine.bukkit.block.BukkitBlockManager;
import net.momirealms.craftengine.bukkit.util.BlockStateUtils;
import net.momirealms.craftengine.core.block.ImmutableBlockState;
@@ -19,13 +20,75 @@ public record VisualBlockStatePacket(int[] data) implements ModPacket {
VisualBlockStatePacket::encode,
VisualBlockStatePacket::new
);
private static final int RLE_THRESHOLD = 3;
private static final int RLE_TAG = 0;
private static final int DELTA_TAG = 1;
private VisualBlockStatePacket(FriendlyByteBuf buf) {
this(buf.readVarIntArray());
this(decode(buf));
}
private void encode(FriendlyByteBuf buf) {
buf.writeVarIntArray(this.data);
encode(buf, this.data);
}
private static void encode(FriendlyByteBuf buf, int[] data) {
if (data.length == 0) {
buf.writeVarInt(0);
return;
}
buf.writeVarInt(data.length);
int i = 0;
int previousValue = 0;
while (i < data.length) {
int currentValue = data[i];
int repeatCount = 1;
int j = i + 1;
while (j < data.length && data[j] == currentValue) {
repeatCount++;
j++;
}
if (repeatCount >= RLE_THRESHOLD) {
buf.writeVarInt(RLE_TAG);
buf.writeVarInt(currentValue);
buf.writeVarInt(repeatCount);
i += repeatCount;
previousValue = currentValue;
} else {
buf.writeVarInt(DELTA_TAG);
int delta = currentValue - previousValue;
buf.writeVarInt(delta);
previousValue = currentValue;
i++;
}
}
}
private static int[] decode(FriendlyByteBuf buf) {
int length = buf.readVarInt();
if (length == 0) return new int[0];
int[] data = new int[length];
int previousValue = 0;
int i = 0;
while (i < length) {
int tag = buf.readVarInt();
if (tag == RLE_TAG) {
int value = buf.readVarInt();
int count = buf.readVarInt();
if (i + count > length) throw new DecoderException("RLE count exceeds array bounds");
for (int j = 0; j < count; j++) data[i++] = value;
previousValue = value;
} else if (tag == DELTA_TAG) {
int delta = buf.readVarInt();
int currentValue = previousValue + delta;
data[i++] = currentValue;
previousValue = currentValue;
} else {
throw new DecoderException("Unknown encoding tag: " + tag);
}
}
if (i != length) throw new DecoderException("Decoded length mismatch");
return data;
}
@Override