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38 lines
1.1 KiB
38 lines
1.1 KiB
/*
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* Copyright 2021 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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#pragma once
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#include <memory>
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#include "phash_config.h"
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namespace android {
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// Class that generates a perceptual hash of an ImageFrame.
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// Not thread-safe.
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class PhashFingerprinter {
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public:
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// Produce the fingerprint of an image frame, which must be 32 by 32
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// grayscale of 1 byte per pixel.
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int64_t GenerateFingerprint(const uint8_t* frame);
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private:
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// Buffers to avoid memory allocation:
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int16_t dct_buf_[kImageSize];
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};
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} // namespace android
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