1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://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,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <memory>
20 
21 #include "SerializedData.h"
22 
23 class CompressionEngine {
24   public:
25     static CompressionEngine& GetInstance();
26 
~CompressionEngine()27     virtual ~CompressionEngine(){};
28 
29     virtual bool Compress(SerializedData& in, size_t data_length, SerializedData& out) = 0;
30     // Decompress the contents of `in` into `out`.  `out.size()` must be set to the decompressed
31     // size of the contents.
32     virtual bool Decompress(SerializedData& in, SerializedData& out) = 0;
33 };
34 
35 class ZlibCompressionEngine : public CompressionEngine {
36   public:
37     bool Compress(SerializedData& in, size_t data_length, SerializedData& out) override;
38     bool Decompress(SerializedData& in, SerializedData& out) override;
39 };
40 
41 class ZstdCompressionEngine : public CompressionEngine {
42   public:
43     bool Compress(SerializedData& in, size_t data_length, SerializedData& out) override;
44     bool Decompress(SerializedData& in, SerializedData& out) override;
45 };