76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef DEFAULT_CAMERA_HAL_METADATA_METADATA_READER_H_
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#define DEFAULT_CAMERA_HAL_METADATA_METADATA_READER_H_
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#include <memory>
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#include <set>
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#include <vector>
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#include <android-base/macros.h>
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#include <camera/CameraMetadata.h>
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#include "types.h"
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namespace default_camera_hal {
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// A MetadataReader reads and converts/validates various metadata entries.
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class MetadataReader {
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public:
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MetadataReader(std::unique_ptr<const android::CameraMetadata> metadata);
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virtual ~MetadataReader();
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// Get a pointer to the underlying metadata being read.
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// The pointer is valid only as long as this object is alive.
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// The "locking" here only causes non-const methods to fail,
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// which is not a problem since the CameraMetadata being locked
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// is already const. This could be a problem if the metadata was
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// shared more widely, but |metadata_| is a unique_ptr,
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// guaranteeing the safety of this. Destructing automatically "unlocks".
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virtual const camera_metadata_t* raw_metadata() const {
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return metadata_->getAndLock();
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}
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// All accessor methods must be given a valid pointer. They will return:
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// 0: Success.
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// -ENOENT: The necessary entry is missing.
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// -EINVAL: The entry value is invalid.
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// -ENODEV: Some other error occured.
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// The |facing| returned will be one of the enum values from system/camera.h.
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virtual int Facing(int* facing) const;
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virtual int Orientation(int* orientation) const;
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virtual int MaxInputStreams(int32_t* max_input_streams) const;
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virtual int MaxOutputStreams(int32_t* max_raw_output_streams,
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int32_t* max_non_stalling_output_streams,
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int32_t* max_stalling_output_streams) const;
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virtual int RequestCapabilities(std::set<uint8_t>* capabilites) const;
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virtual int StreamConfigurations(
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std::vector<StreamConfiguration>* configs) const;
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virtual int StreamStallDurations(
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std::vector<StreamStallDuration>* stalls) const;
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virtual int ReprocessFormats(ReprocessFormatMap* reprocess_map) const;
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private:
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std::unique_ptr<const android::CameraMetadata> metadata_;
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DISALLOW_COPY_AND_ASSIGN(MetadataReader);
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};
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} // namespace default_camera_hal
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#endif // DEFAULT_CAMERA_HAL_METADATA_METADATA_READER_H_
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