1 /*
2 * Copyright (c) 2021-2023 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 void ReadCameraMetadata(MessageParcel &data, common_metadata_header_t *meta, uint32_t tagCount);
35 static bool WriteCameraMetadata(const common_metadata_header_t* meta, MessageParcel &data);
36 static std::string EncodeToString(std::shared_ptr<CameraMetadata> metadata);
37 static std::shared_ptr<CameraMetadata> DecodeFromString(std::string setting);
38 static bool ConvertMetadataToVec(const std::shared_ptr<CameraMetadata> &metadata,
39 std::vector<uint8_t>& cameraAbility);
40 static void ConvertVecToMetadata(const std::vector<uint8_t>& cameraAbility,
41 std::shared_ptr<CameraMetadata> &metadata);
42 static void FreeMetadataBuffer(camera_metadata_item_t &entry);
43
44 template <class T> static void WriteData(T data, std::vector<uint8_t>& cameraAbility);
45 template <class T> static void ReadData(T &data, int32_t &index, const std::vector<uint8_t>& cameraAbility);
46 private:
47 static bool WriteMetadata(const camera_metadata_item_t &item, MessageParcel &data);
48 static bool ReadMetadata(camera_metadata_item_t &item, MessageParcel &data);
49 static void ItemDataToBuffer(const camera_metadata_item_t &item, void **buffer);
50 static void WriteMetadataDataToVec(const camera_metadata_item_t &entry, std::vector<uint8_t>& cameraAbility);
51 static void ReadMetadataDataFromVec(int32_t &index, camera_metadata_item_t &entry,
52 const std::vector<uint8_t>& cameraAbility);
53 static int copyEncodeToStringMem(common_metadata_header_t *meta, char *encodeData, int32_t encodeDataLen);
54 static int copyDecodeFromStringMem(common_metadata_header_t *meta, char *decodeData,
55 char *decodeMetadataData, uint32_t totalLen);
56 };
57
58 template <class T>
WriteData(T data,std::vector<uint8_t> & cameraAbility)59 void MetadataUtils::WriteData(T data, std::vector<uint8_t>& cameraAbility)
60 {
61 T dataTemp = data;
62 uint8_t *dataPtr = reinterpret_cast<uint8_t *>(&dataTemp);
63 for (size_t j = 0; j < sizeof(T); j++) {
64 cameraAbility.push_back(*(dataPtr + j));
65 }
66 }
67
68 template <class T>
ReadData(T & data,int32_t & index,const std::vector<uint8_t> & cameraAbility)69 void MetadataUtils::ReadData(T &data, int32_t &index, const std::vector<uint8_t>& cameraAbility)
70 {
71 constexpr uint32_t typeLen = sizeof(T);
72 uint8_t array[typeLen] = {0};
73 T *ptr = nullptr;
74 for (size_t j = 0; j < sizeof(T); j++) {
75 array[j] = cameraAbility.at(index++);
76 }
77 ptr = reinterpret_cast<T *>(array);
78 data = *ptr;
79 }
80 } // namespace Camera
81 #endif // OHOS_CAMERA_METADATA_UTILS_H
82