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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 DEFAULT_CAMERA_HAL_METADATA_METADATA_READER_H_
#define DEFAULT_CAMERA_HAL_METADATA_METADATA_READER_H_
#include <map>
#include <memory>
#include <set>
#include <vector>
#include <android-base/macros.h>
#include <camera/CameraMetadata.h>
#include "types.h"
namespace default_camera_hal {
// A MetadataReader reads and converts/validates various metadata entries.
class MetadataReader {
public:
MetadataReader(std::unique_ptr<const android::CameraMetadata> metadata);
virtual ~MetadataReader();
// Get a pointer to the underlying metadata being read.
// The pointer is valid only as long as this object is alive.
// The "locking" here only causes non-const methods to fail,
// which is not a problem since the CameraMetadata being locked
// is already const. This could be a problem if the metadata was
// shared more widely, but |metadata_| is a unique_ptr,
// guaranteeing the safety of this. Destructing automatically "unlocks".
virtual const camera_metadata_t* raw_metadata() const {
return metadata_->getAndLock();
}
// All accessor methods must be given a valid pointer. They will return:
// 0: Success.
// -ENOENT: The necessary entry is missing.
// -EINVAL: The entry value is invalid.
// -ENODEV: Some other error occured.
// The |facing| returned will be one of the enum values from system/camera.h.
virtual int Facing(int* facing) const;
virtual int Orientation(int* orientation) const;
virtual int MaxInputStreams(int32_t* max_input_streams) const;
virtual int MaxOutputStreams(int32_t* max_raw_output_streams,
int32_t* max_non_stalling_output_streams,
int32_t* max_stalling_output_streams) const;
virtual int RequestCapabilities(std::set<uint8_t>* capabilites) const;
virtual int StreamConfigurations(
std::vector<StreamConfiguration>* configs) const;
virtual int StreamStallDurations(
std::vector<StreamStallDuration>* stalls) const;
virtual int ReprocessFormats(ReprocessFormatMap* reprocess_map) const;
private:
std::unique_ptr<const android::CameraMetadata> metadata_;
DISALLOW_COPY_AND_ASSIGN(MetadataReader);
};
} // namespace default_camera_hal
#endif // DEFAULT_CAMERA_HAL_METADATA_METADATA_READER_H_
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