1 /*
2  * Copyright (C) 2016 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 #ifndef CALIBRATION_FILE_H_
18 #define CALIBRATION_FILE_H_
19 
20 #include <inttypes.h>
21 #include <unistd.h>
22 
23 #include <memory>
24 
25 #include "file.h"
26 #include "noncopyable.h"
27 #include "JSONObject.h"
28 #include <utils/RefBase.h>
29 
30 namespace android {
31 
32 class CalibrationFile : public NonCopyable {
33   public:
34     // Get a pointer to the singleton instance
35     static std::shared_ptr<CalibrationFile> Instance();
36 
37     const sp<JSONObject> GetJSONObject() const;
38 
39     bool SetSingleAxis(const char *key, int32_t value);
40     bool SetSingleAxis(const char *key, float value);
41     bool SetTripleAxis(const char *key, int32_t x, int32_t y, int32_t z);
42     bool SetFourAxis(const char *key, int32_t x, int32_t y, int32_t z,
43                      int32_t w);
44 
45     bool Save();
46 
47   private:
CalibrationFile()48     CalibrationFile() : file_(nullptr), json_root_(nullptr) {}
49 
50     static std::shared_ptr<CalibrationFile> instance_;
51     bool Initialize();
52 
53     std::unique_ptr<File> file_;
54     sp<JSONObject> json_root_;
55 
56     bool Read();
57 };
58 
59 }  // namespace android
60 
61 #endif  // CALIBRATION_FILE_H_
62