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 <hardware/camera3.h> 21 #include <hardware/gralloc.h> 22 #include <system/camera_metadata.h> 23 #include <system/graphics.h> 24 25 namespace default_camera_hal { 26 // Metadata is a convenience class for dealing with libcamera_metadata 27 class Metadata { 28 public: 29 Metadata(); 30 ~Metadata(); 31 // Constructor used for request metadata templates 32 Metadata(uint8_t mode, uint8_t intent); 33 34 // Parse and add an entry 35 int addUInt8(uint32_t tag, int count, uint8_t *data); 36 int addInt32(uint32_t tag, int count, int32_t *data); 37 int addFloat(uint32_t tag, int count, float *data); 38 int addInt64(uint32_t tag, int count, int64_t *data); 39 int addDouble(uint32_t tag, int count, double *data); 40 int addRational(uint32_t tag, int count, 41 camera_metadata_rational_t *data); 42 // Generate a camera_metadata structure and fill it with internal data 43 camera_metadata_t *generate(); 44 45 private: 46 // Validate the tag, type and count for a metadata entry 47 bool validate(uint32_t tag, int tag_type, int count); 48 // Add a verified tag with data to this Metadata structure 49 int add(uint32_t tag, int count, void *tag_data); 50 51 class Entry { 52 public: 53 Entry(uint32_t tag, void *data, int count); 54 ~Entry(); 55 Entry *mNext; 56 Entry *mPrev; 57 const uint32_t mTag; 58 const void *mData; 59 const int mCount; 60 void insertAfter(Entry *e); 61 }; 62 // List ends 63 Entry *mHead; 64 Entry *mTail; 65 // Append entry to list 66 void push(Entry *e); 67 // Total of entries and entry data size 68 int mEntryCount; 69 int mDataCount; 70 // Save generated metadata, invalidated on update 71 camera_metadata_t *mGenerated; 72 // Flag to force metadata regeneration 73 bool mDirty; 74 // Lock protecting the Metadata object for modifications 75 pthread_mutex_t mMutex; 76 }; 77 } // namespace default_camera_hal 78 79 #endif // METADATA_H_ 80
