mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
49 lines
1.8 KiB
C++
49 lines
1.8 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2013 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
=============================================================================*/
|
|
#ifndef SPROUT_NUMERIC_DFT_IDFT_ELEMENT_HPP
|
|
#define SPROUT_NUMERIC_DFT_IDFT_ELEMENT_HPP
|
|
|
|
#include <iterator>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/math/constants.hpp>
|
|
#include <sprout/iterator/operation.hpp>
|
|
#include <sprout/numeric/dft/detail/dft_element_gen.hpp>
|
|
|
|
namespace sprout {
|
|
namespace detail {
|
|
template<typename InputIterator, typename Size>
|
|
inline SPROUT_CONSTEXPR typename std::iterator_traits<InputIterator>::value_type
|
|
idft_element_impl(
|
|
InputIterator first, InputIterator last, typename std::iterator_traits<InputIterator>::difference_type i,
|
|
Size size
|
|
)
|
|
{
|
|
typedef typename std::iterator_traits<InputIterator>::value_type value_type;
|
|
typedef typename value_type::value_type elem_type;
|
|
return sprout::detail::dft_element_gen(
|
|
first, last,
|
|
sprout::math::two_pi<elem_type>() * i / size
|
|
)
|
|
/ static_cast<elem_type>(size)
|
|
;
|
|
}
|
|
} // namespace detail
|
|
//
|
|
// idft_element
|
|
//
|
|
template<typename InputIterator>
|
|
inline SPROUT_CONSTEXPR typename std::iterator_traits<InputIterator>::value_type
|
|
idft_element( InputIterator first, InputIterator last, typename std::iterator_traits<InputIterator>::difference_type i) {
|
|
return sprout::detail::idft_element_impl(
|
|
first, last, i,
|
|
sprout::distance(first, last)
|
|
);
|
|
}
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_NUMERIC_DFT_IDFT_ELEMENT_HPP
|