Alex Ray | b0be103 | 2013-05-28 15:52:47 -0700 | [diff] [blame^] | 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 | |
| 32 | // Parse and add an entry |
| 33 | int addUInt8(uint32_t tag, int count, uint8_t *data); |
| 34 | int addInt32(uint32_t tag, int count, int32_t *data); |
| 35 | int addFloat(uint32_t tag, int count, float *data); |
| 36 | int addInt64(uint32_t tag, int count, int64_t *data); |
| 37 | int addDouble(uint32_t tag, int count, double *data); |
| 38 | int addRational(uint32_t tag, int count, |
| 39 | camera_metadata_rational_t *data); |
| 40 | // Generate a camera_metadata structure and fill it with internal data |
| 41 | camera_metadata_t *generate(); |
| 42 | |
| 43 | private: |
| 44 | // Validate the tag, type and count for a metadata entry |
| 45 | bool validate(uint32_t tag, int tag_type, int count); |
| 46 | // Add a verified tag with data to this Metadata structure |
| 47 | int add(uint32_t tag, int count, void *tag_data); |
| 48 | |
| 49 | class Entry { |
| 50 | public: |
| 51 | Entry(uint32_t tag, void *data, int count); |
| 52 | ~Entry(); |
| 53 | Entry *mNext; |
| 54 | Entry *mPrev; |
| 55 | const uint32_t mTag; |
| 56 | const void *mData; |
| 57 | const int mCount; |
| 58 | void insertAfter(Entry *e); |
| 59 | }; |
| 60 | // List ends |
| 61 | Entry *mHead; |
| 62 | Entry *mTail; |
| 63 | // Append entry to list |
| 64 | void push(Entry *e); |
| 65 | // Total of entries and entry data size |
| 66 | int mEntryCount; |
| 67 | int mDataCount; |
| 68 | // Save generated metadata, invalidated on update |
| 69 | camera_metadata_t *mGenerated; |
| 70 | // Lock protecting the Metadata object for modifications |
| 71 | pthread_mutex_t mMutex; |
| 72 | }; |
| 73 | } // namespace default_camera_hal |
| 74 | |
| 75 | #endif // METADATA_H_ |