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Add abstract property class.

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Partial implementation of tagged partial metadata.
Has a single static tag and implements the populate/supports/set
methods. Adds Value() virtual method that must be overriden.

BUG: 30140438
Change-Id: I2b4927e0d3550235106593cc1ba501c95ba9d2c4
This commit is contained in:
Ari Hausman-Cohen 2016-08-02 11:03:15 -07:00
parent 980bc399c1
commit 407cca9753
1 changed files with 64 additions and 0 deletions
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64
modules/camera/3_4/metadata/property.h Normal file
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/*
* Copyright (C) 2016 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 V4L2_CAMERA_HAL_METADATA_PROPERTY_H_
#define V4L2_CAMERA_HAL_METADATA_PROPERTY_H_
#include "../common.h"
#include "tagged_partial_metadata.h"
namespace v4l2_camera_hal {
// A Property is a PartialMetadata that only has a single static tag.
template <typename T>
class Property : public TaggedPartialMetadata {
public:
Property(int32_t tag) : TaggedPartialMetadata({tag}, {}, {}){};
virtual int PopulateStaticFields(
android::CameraMetadata* metadata) const override {
HAL_LOG_ENTER();
return UpdateMetadata(metadata, Tag(), Value());
};
virtual int PopulateDynamicFields(
android::CameraMetadata* metadata) const override {
HAL_LOG_ENTER();
return 0;
};
virtual bool SupportsRequestValues(
const android::CameraMetadata& metadata) const override {
HAL_LOG_ENTER();
return true;
};
virtual int SetRequestValues(
const android::CameraMetadata& metadata) override {
HAL_LOG_ENTER();
return 0;
};
protected:
// Simpler access to tag.
inline int32_t Tag() const { return StaticTags()[0]; }
// Get the value associated with this property.
virtual const T& Value() const = 0;
};
} // namespace v4l2_camera_hal
#endif // V4L2_CAMERA_HAL_METADATA_PROPERTY_H_