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18 lines
862 B
18 lines
862 B
#pragma once
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#include <av/av.hpp>
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#include <utility>
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// A fingerprint is used to speed up comparison. However, this is done assymetrically. Only the
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// compressed version is used in the database, but for comparison the full image can be used.
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template <typename Fingerprint>
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struct fingerprint_traits {
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using fingerprint = Fingerprint;
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using pre_fingerprint = decltype(fingerprint::pre_calculate(std::declval<av::frame>()));
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static pre_fingerprint pre_calculate(av::frame const & frame) { return fingerprint::pre_calculate(frame); }
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static fingerprint calculate(av::frame const & frame) { return fingerprint::calculate(frame); }
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static auto distance(fingerprint const & x, pre_fingerprint const & y) { return x.distance_to(y); }
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using distance_type = decltype(distance(std::declval<fingerprint const &>(), std::declval<pre_fingerprint const &>()));
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};
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