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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef METADATA_H_
#define METADATA_H_
#include <stdint.h>
#include <hardware/camera3.h>
#include <system/camera_metadata.h>
namespace usb_camera_hal {
// Metadata is a convenience class for dealing with libcamera_metadata
class Metadata {
public:
Metadata();
~Metadata();
// Initialize with framework metadata
int init(const camera_metadata_t *metadata);
// Parse and add an entry. Allocates and copies new storage for *data.
int addUInt8(uint32_t tag, int count, const uint8_t *data);
int add1UInt8(uint32_t tag, const uint8_t data);
int addInt32(uint32_t tag, int count, const int32_t *data);
int addFloat(uint32_t tag, int count, const float *data);
int addInt64(uint32_t tag, int count, const int64_t *data);
int addDouble(uint32_t tag, int count, const double *data);
int addRational(uint32_t tag, int count,
const camera_metadata_rational_t *data);
// Get a handle to the current metadata
// This is not a durable handle, and may be destroyed by add*/init
camera_metadata_t* get();
private:
// Actual internal storage
camera_metadata_t* mData;
// Destroy old metadata and replace with new
void replace(camera_metadata_t *m);
// Validate the tag, type and count for a metadata entry
bool validate(uint32_t tag, int tag_type, int count);
// Add a verified tag with data
int add(uint32_t tag, int count, const void *tag_data);
};
} // namespace usb_camera_hal
#endif // METADATA_H_
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