76 lines
2.6 KiB
C++
76 lines
2.6 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 V4L2_CAMERA_HAL_METADATA_SCALING_CONVERTER_H_
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#define V4L2_CAMERA_HAL_METADATA_SCALING_CONVERTER_H_
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#include "common.h"
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#include "converter_interface.h"
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namespace v4l2_camera_hal {
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// An ScalingConverter scales values up or down.
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template <typename TMetadata, typename TV4L2>
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class ScalingConverter : public ConverterInterface<TMetadata, TV4L2> {
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public:
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ScalingConverter(TMetadata v4l2_to_metadata_numerator,
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TMetadata v4l2_to_metadata_denominator);
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virtual int MetadataToV4L2(TMetadata value, TV4L2* conversion) override;
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virtual int V4L2ToMetadata(TV4L2 value, TMetadata* conversion) override;
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private:
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const TMetadata v4l2_to_metadata_numerator_;
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const TMetadata v4l2_to_metadata_denominator_;
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DISALLOW_COPY_AND_ASSIGN(ScalingConverter);
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};
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// -----------------------------------------------------------------------------
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template <typename TMetadata, typename TV4L2>
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ScalingConverter<TMetadata, TV4L2>::ScalingConverter(
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TMetadata v4l2_to_metadata_numerator,
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TMetadata v4l2_to_metadata_denominator)
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: v4l2_to_metadata_numerator_(v4l2_to_metadata_numerator),
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v4l2_to_metadata_denominator_(v4l2_to_metadata_denominator) {
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HAL_LOG_ENTER();
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}
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template <typename TMetadata, typename TV4L2>
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int ScalingConverter<TMetadata, TV4L2>::MetadataToV4L2(TMetadata value,
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TV4L2* conversion) {
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HAL_LOG_ENTER();
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*conversion = static_cast<TV4L2>(value * v4l2_to_metadata_denominator_ /
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v4l2_to_metadata_numerator_);
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return 0;
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}
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template <typename TMetadata, typename TV4L2>
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int ScalingConverter<TMetadata, TV4L2>::V4L2ToMetadata(TV4L2 value,
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TMetadata* conversion) {
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HAL_LOG_ENTER();
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*conversion = static_cast<TMetadata>(value) * v4l2_to_metadata_numerator_ /
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v4l2_to_metadata_denominator_;
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return 0;
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}
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} // namespace v4l2_camera_hal
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#endif // V4L2_CAMERA_HAL_METADATA_SCALING_CONVERTER_H_
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