88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
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///\file
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/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2021 John Wellbelove
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#ifndef ETL_QUANTIZE_INCLUDED
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#define ETL_QUANTIZE_INCLUDED
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#include "platform.h"
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#include "functional.h"
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#include "type_traits.h"
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////#include <math.h>
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#include <stdint.h>
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namespace etl
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{
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//***************************************************************************
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/// Quantize .
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//***************************************************************************
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template<typename TInput, typename TCompare = etl::less<TInput> >
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class quantize : public etl::unary_function<TInput, TInput>
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{
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public:
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//*****************************************************************
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// Constructor.
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//*****************************************************************
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quantize (const TInput* p_thresholds_, const TInput* p_quantizations_, size_t n_quantizations_, TCompare compare_ = TCompare())
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: p_thresholds(p_thresholds_)
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, p_quantizations(p_quantizations_)
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, n_levels(n_quantizations_ - 1U)
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, compare(compare_)
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{
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}
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//*****************************************************************
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// operator ()
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//*****************************************************************
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TInput operator ()(TInput value) const
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{
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for (size_t i = 0UL; i < n_levels; ++i)
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{
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if (compare(value, p_thresholds[i]))
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{
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return p_quantizations[i];
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}
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}
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return p_quantizations[n_levels];
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}
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private:
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const TInput* const p_thresholds;
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const TInput* const p_quantizations;
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const size_t n_levels;
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const TCompare compare;
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};
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}
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#endif
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