1 /*
2 * This file is part of Waarp Project (named also Waarp or GG).
3 *
4 * Copyright (c) 2019, Waarp SAS, and individual contributors by the @author
5 * tags. See the COPYRIGHT.txt in the distribution for a full listing of
6 * individual contributors.
7 *
8 * All Waarp Project is free software: you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or (at your
11 * option) any later version.
12 *
13 * Waarp is distributed in the hope that it will be useful, but WITHOUT ANY
14 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
15 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * Waarp . If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 /*
22 * Licensed under the Apache License, Version 2.0 (the "License");
23 * you may not use this file except in compliance with the License.
24 * You may obtain a copy of the License at
25 *
26 * http://www.apache.org/licenses/LICENSE-2.0
27 *
28 * Unless required by applicable law or agreed to in writing, software
29 * distributed under the License is distributed on an "AS IS" BASIS,
30 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
31 * See the License for the specific language governing permissions and
32 * limitations under the License.
33 */
34 package org.waarp.compress.zstdunsafe;
35
36 class CompressionContext {
37 public final RepeatedOffsets offsets = new RepeatedOffsets();
38 public final BlockCompressionState blockCompressionState;
39 public final SequenceStore sequenceStore;
40
41 public final SequenceEncodingContext sequenceEncodingContext =
42 new SequenceEncodingContext();
43
44 public final HuffmanCompressionContext huffmanContext =
45 new HuffmanCompressionContext();
46
47 public CompressionContext(final CompressionParameters parameters,
48 final long baseAddress, final int inputSize) {
49 final int windowSize =
50 Math.max(1, Math.min(1 << parameters.getWindowLog(), inputSize));
51 final int blockSize = Math.min(Constants.MAX_BLOCK_SIZE, windowSize);
52 final int divider = (parameters.getSearchLength() == 3)? 3 : 4;
53
54 final int maxSequences = blockSize / divider;
55
56 sequenceStore = new SequenceStore(blockSize, maxSequences);
57
58 blockCompressionState = new BlockCompressionState(parameters, baseAddress);
59 }
60
61 public void commit() {
62 offsets.commit();
63 huffmanContext.saveChanges();
64 }
65 }