1 /*
2 * Copyright 2021 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package io.netty.handler.codec.compression;
17
18 import com.github.luben.zstd.Zstd;
19
20 final class ZstdConstants {
21
22 /**
23 * Default compression level
24 */
25 static final int DEFAULT_COMPRESSION_LEVEL = Zstd.defaultCompressionLevel();
26
27 /**
28 * Min compression level
29 */
30 static final int MIN_COMPRESSION_LEVEL = Zstd.minCompressionLevel();
31
32 /**
33 * Max compression level
34 */
35 static final int MAX_COMPRESSION_LEVEL = Zstd.maxCompressionLevel();
36
37 /**
38 * Max block size
39 */
40 static final int MAX_BLOCK_SIZE = 1 << (DEFAULT_COMPRESSION_LEVEL + 7) + 0x0F; // 32 M
41 /**
42 * Default block size
43 */
44 static final int DEFAULT_BLOCK_SIZE = 1 << 16; // 64 KB
45
46 private ZstdConstants() { }
47 }