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sprout/functional/dft.hpp 追加

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sprout/complex.hpp 修正
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bolero-MURAKAMI 2012-02-25 23:59:46 +09:00
parent aa96f9ce73
commit 10c73ea3e3
17 changed files with 453 additions and 24 deletions
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50
sprout/functional/dft/idft_element.hpp Normal file
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#ifndef SPROUT_FUNCTIONAL_DFT_FIXED_IDFT_ELEMENT_HPP
#define SPROUT_FUNCTIONAL_DFT_FIXED_IDFT_ELEMENT_HPP
#include <iterator>
#include <sprout/config.hpp>
#include <sprout/functional/dft/detail/dft_element_gen.hpp>
#include <sprout/math/constants.hpp>
#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT_DETAIL
namespace sprout {
namespace detail {
template<typename InputIterator, typename Size>
SPROUT_CONSTEXPR inline 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,
2 * sprout::math::pi<elem_type>() * i / size
)
/ static_cast<elem_type>(size)
;
}
} // namespace detail
//
// idft_element
//
template<typename InputIterator>
SPROUT_CONSTEXPR inline 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,
NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(first, last)
);
}
} // namespace sprout
#endif // #ifndef SPROUT_FUNCTIONAL_DFT_FIXED_IDFT_ELEMENT_HPP