mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
98 lines
3.8 KiB
C++
98 lines
3.8 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_FIXED_SINUSOID_HPP
|
|
#define SPROUT_NUMERIC_DFT_FIXED_SINUSOID_HPP
|
|
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/index_tuple/metafunction.hpp>
|
|
#include <sprout/container/traits.hpp>
|
|
#include <sprout/container/functions.hpp>
|
|
#include <sprout/container/indexes.hpp>
|
|
#include <sprout/algorithm/fixed/result_of.hpp>
|
|
#include <sprout/pit/pit.hpp>
|
|
#include <sprout/math/constants.hpp>
|
|
#include <sprout/math/sin.hpp>
|
|
#include <sprout/detail/container_complate.hpp>
|
|
|
|
namespace sprout {
|
|
namespace fixed {
|
|
namespace detail {
|
|
template<typename Container, sprout::index_t... Indexes>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Container>::type
|
|
sinusoid_impl(
|
|
Container const& cont,
|
|
typename sprout::container_traits<Container>::value_type const& d,
|
|
typename sprout::container_traits<Container>::value_type const& amplitude,
|
|
typename sprout::container_traits<Container>::value_type const& phase,
|
|
sprout::index_tuple<Indexes...>,
|
|
typename sprout::container_traits<Container>::difference_type offset,
|
|
typename sprout::container_traits<Container>::size_type size
|
|
)
|
|
{
|
|
typedef typename sprout::container_traits<Container>::value_type value_type;
|
|
using sprout::sin;
|
|
return sprout::remake<Container>(
|
|
cont, size,
|
|
(Indexes >= offset && Indexes < offset + size
|
|
? amplitude * sin(d * value_type(Indexes) + phase)
|
|
: *sprout::next(sprout::internal_begin(cont), Indexes)
|
|
)...
|
|
);
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Container>::type
|
|
sinusoid(
|
|
Container const& cont,
|
|
typename sprout::container_traits<Container>::value_type const& frequency,
|
|
typename sprout::container_traits<Container>::value_type const& amplitude,
|
|
typename sprout::container_traits<Container>::value_type const& phase
|
|
)
|
|
{
|
|
typedef typename sprout::container_traits<Container>::value_type value_type;
|
|
return sprout::fixed::detail::sinusoid_impl(
|
|
cont,
|
|
sprout::math::two_pi<value_type>() * frequency / value_type(sprout::size(cont)),
|
|
amplitude,
|
|
phase,
|
|
sprout::container_indexes<Container>::make(),
|
|
sprout::internal_begin_offset(cont),
|
|
sprout::size(cont)
|
|
);
|
|
}
|
|
} // namespace detail
|
|
//
|
|
// sinusoid
|
|
//
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Container>::type
|
|
sinusoid(
|
|
Container const& cont,
|
|
typename sprout::container_traits<Container>::value_type const& frequency = 1,
|
|
typename sprout::container_traits<Container>::value_type const& amplitude = 1,
|
|
typename sprout::container_traits<Container>::value_type const& phase = 0
|
|
)
|
|
{
|
|
return sprout::fixed::detail::sinusoid(cont, frequency, amplitude, phase);
|
|
}
|
|
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Container>::type
|
|
sinusoid(
|
|
typename sprout::container_traits<Container>::value_type const& frequency = 1,
|
|
typename sprout::container_traits<Container>::value_type const& amplitude = 1,
|
|
typename sprout::container_traits<Container>::value_type const& phase = 0
|
|
)
|
|
{
|
|
return sprout::fixed::sinusoid(sprout::pit<Container>(), frequency, amplitude, phase);
|
|
}
|
|
} // namespace fixed
|
|
|
|
using sprout::fixed::sinusoid;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_NUMERIC_DFT_FIXED_SINUSOID_HPP
|