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
24namespace default_camera_hal {
25// Metadata is a convenience class for dealing with libcamera_metadata
26class 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