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