mirror of
https://github.com/bolero-MURAKAMI/Sprout
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80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
#ifndef SPROUT_NUMERIC_DFT_FIXED_AMPLITUDE_SPECTRUM_HPP
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#define SPROUT_NUMERIC_DFT_FIXED_AMPLITUDE_SPECTRUM_HPP
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#include <sprout/config.hpp>
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#include <sprout/index_tuple.hpp>
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#include <sprout/container/traits.hpp>
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#include <sprout/container/functions.hpp>
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#include <sprout/iterator/operation.hpp>
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#include <sprout/algorithm/fixed/result_of.hpp>
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#include <sprout/complex.hpp>
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#include <sprout/math/sqrt.hpp>
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#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT
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namespace sprout {
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namespace fixed {
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namespace detail {
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template<typename InputIterator, typename Result, sprout::index_t... Indexes>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Result>::type
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amplitude_spectrum_impl(
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InputIterator first,
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InputIterator last,
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Result const& result,
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sprout::index_tuple<Indexes...>,
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typename sprout::container_traits<Result>::difference_type offset,
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typename sprout::container_traits<Result>::size_type size,
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typename sprout::container_traits<Result>::size_type input_size
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)
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{
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using sprout::real;
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using sprout::imag;
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return sprout::remake<Result>(
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result,
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size,
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(Indexes >= offset && Indexes < offset + size && Indexes < offset + input_size
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? sprout::sqrt(
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real(*sprout::next(first, Indexes)) * real(*sprout::next(first, Indexes))
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+ imag(*sprout::next(first, Indexes)) * imag(*sprout::next(first, Indexes))
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)
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: *sprout::next(sprout::internal_begin(result), Indexes)
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)...
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);
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}
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template<typename InputIterator, typename Result>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Result>::type
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amplitude_spectrum(
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InputIterator first,
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InputIterator last,
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Result const& result
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)
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{
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return sprout::fixed::detail::amplitude_spectrum_impl(
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first,
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last,
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result,
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sprout::index_range<0, sprout::container_traits<Result>::static_size>::make(),
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sprout::internal_begin_offset(result),
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sprout::size(result),
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NS_SSCRISK_CEL_OR_SPROUT::distance(first, last)
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);
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}
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} // namespace detail
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//
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// amplitude_spectrum
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//
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template<typename InputIterator, typename Result>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Result>::type
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amplitude_spectrum(
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InputIterator first,
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InputIterator last,
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Result const& result
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)
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{
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return sprout::fixed::detail::amplitude_spectrum(first, last, result);
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}
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} // namespace fixed
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using sprout::fixed::amplitude_spectrum;
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} // namespace sprout
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#endif // #ifndef SPROUT_NUMERIC_DFT_FIXED_AMPLITUDE_SPECTRUM_HPP
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