Sprout/sprout/numeric/dft/detail/square.hpp

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/*=============================================================================
Copyright (c) 2011-2014 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_DETAIL_SQUARE_HPP
#define SPROUT_NUMERIC_DFT_DETAIL_SQUARE_HPP
#include <sprout/config.hpp>
#include <sprout/numeric/dft/detail/sawtooth.hpp>
namespace sprout {
namespace detail {
template<typename T>
inline SPROUT_CONSTEXPR T
square_value_impl(T const& t, T const& duty) {
return sprout::detail::sawtooth_value_impl(t) - sprout::detail::sawtooth_value_impl(t - duty);
}
template<typename T, typename Index>
inline SPROUT_CONSTEXPR T
square_value(T const& frequency, T const& amplitude, T const& phase, T const& duty, Index i) {
return amplitude * sprout::detail::square_value_impl(frequency * T(i) + phase, duty);
}
} // namespace detail
} // namespace sprout
#endif // #ifndef SPROUT_NUMERIC_DFT_DETAIL_SQUARE_HPP