1 /*
2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #ifndef OHOS_CAMERA_METADATA_UTILS_H
17 #define OHOS_CAMERA_METADATA_UTILS_H
18
19 #include <iostream>
20 #include <list>
21 #include <map>
22 #include <vector>
23
24 #include "camera_metadata_info.h"
25 #include "message_parcel.h"
26
27 namespace OHOS::Camera {
28 class MetadataUtils {
29 public:
30 static bool EncodeCameraMetadata(const std::shared_ptr<CameraMetadata> &metadata,
31 MessageParcel &data);
32 static void DecodeCameraMetadata(MessageParcel &data, std::shared_ptr<CameraMetadata> &metadata);
33
34 static std::string EncodeToString(std::shared_ptr<CameraMetadata> metadata);
35 static std::shared_ptr<CameraMetadata> DecodeFromString(std::string setting);
36 static bool ConvertMetadataToVec(const std::shared_ptr<CameraMetadata> &metadata,
37 std::vector<uint8_t>& cameraAbility);
38 static void ConvertVecToMetadata(const std::vector<uint8_t>& cameraAbility,
39 std::shared_ptr<CameraMetadata> &metadata);
40 static void FreeMetadataBuffer(camera_metadata_item_t &entry);
41 private:
42 static bool WriteMetadata(const camera_metadata_item_t &item, MessageParcel &data);
43 static bool ReadMetadata(camera_metadata_item_t &item, MessageParcel &data);
44 static void ItemDataToBuffer(const camera_metadata_item_t &item, void **buffer);
45 static bool WriteMetadataDataToVec(const camera_metadata_item_t &entry, std::vector<uint8_t>& cameraAbility);
46 static bool ReadMetadataDataFromVec(int32_t &index, camera_metadata_item_t &entry,
47 const std::vector<uint8_t>& cameraAbility);
48 template <class T> static void WriteData(T data, std::vector<uint8_t>& cameraAbility);
49 template <class T> static void ReadData(T &data, int32_t &index, const std::vector<uint8_t>& cameraAbility);
50 };
51
52 template <class T>
WriteData(T data,std::vector<uint8_t> & cameraAbility)53 void MetadataUtils::WriteData(T data, std::vector<uint8_t>& cameraAbility)
54 {
55 T dataTemp = data;
56 uint8_t *dataPtr = (uint8_t *)&dataTemp;
57 for (size_t j = 0; j < sizeof(T); j++) {
58 cameraAbility.push_back(*(dataPtr + j));
59 }
60 }
61
62 template <class T>
ReadData(T & data,int32_t & index,const std::vector<uint8_t> & cameraAbility)63 void MetadataUtils::ReadData(T &data, int32_t &index, const std::vector<uint8_t>& cameraAbility)
64 {
65 constexpr uint32_t typeLen = sizeof(T);
66 uint8_t array[typeLen] = {0};
67 T *ptr = nullptr;
68 for (size_t j = 0; j < sizeof(T); j++) {
69 array[j] = cameraAbility.at(index++);
70 }
71 ptr = (T *)array;
72 data = *ptr;
73 }
74 } // namespace Camera
75 #endif // OHOS_CAMERA_METADATA_UTILS_H
76