1 /* 2 * Copyright (C) 2013 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 METADATA_H_ 18 #define METADATA_H_ 19 20 #include <stdint.h> 21 #include <hardware/camera3.h> 22 #include <system/camera_metadata.h> 23 24 namespace default_camera_hal { 25 // Metadata is a convenience class for dealing with libcamera_metadata 26 class Metadata { 27 public: 28 Metadata(); 29 ~Metadata(); 30 // Initialize with framework metadata 31 int init(const camera_metadata_t *metadata); 32 33 // Parse and add an entry. Allocates and copies new storage for *data. 34 int addUInt8(uint32_t tag, int count, const uint8_t *data); 35 int add1UInt8(uint32_t tag, const uint8_t data); 36 int addInt32(uint32_t tag, int count, const int32_t *data); 37 int addFloat(uint32_t tag, int count, const float *data); 38 int addInt64(uint32_t tag, int count, const int64_t *data); 39 int addDouble(uint32_t tag, int count, const double *data); 40 int addRational(uint32_t tag, int count, 41 const camera_metadata_rational_t *data); 42 43 // Get a handle to the current metadata 44 // This is not a durable handle, and may be destroyed by add*/init 45 camera_metadata_t* get(); 46 47 private: 48 // Actual internal storage 49 camera_metadata_t* mData; 50 // Destroy old metadata and replace with new 51 void replace(camera_metadata_t *m); 52 // Validate the tag, type and count for a metadata entry 53 bool validate(uint32_t tag, int tag_type, int count); 54 // Add a verified tag with data 55 int add(uint32_t tag, int count, const void *tag_data); 56 }; 57 } // namespace default_camera_hal 58 59 #endif // METADATA_H_ 60
