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add compost utility

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bolero-MURAKAMI 2012-12-07 02:31:16 +09:00
parent 24d2a229f3
commit b44f7c8f2a
14 changed files with 670 additions and 29 deletions
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29
sprout/compost/utility/rosenberg.hpp Normal file
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#ifndef SPROUT_COMPOST_UTILITY_ROSENBERG_HPP
#define SPROUT_COMPOST_UTILITY_ROSENBERG_HPP
#include <sprout/config.hpp>
#include <sprout/detail/pow.hpp>
#include <sprout/type_traits/float_promote.hpp>
#include <sprout/math/comparison.hpp>
namespace sprout {
namespace compost {
//
// rosenberg_value
// Rosenberg 波は，声門開大期と閉小期が周期の40%，16%となる非対称形の波形であり，τ1 が開大期，τ2が閉小期を示す．
//
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::float_promote<T>::type
rosenberg_value(T x, T tau1, T tau2) {
typedef typename sprout::float_promote<T>::type type;
return x >= 0 && sprout::math::less_equal(x, tau1)
? 3 * sprout::detail::pow2<type>(x / tau1) - 2 * sprout::detail::pow3<type>(x / tau1)
: sprout::math::greater(x, tau1) && sprout::math::less_equal(x, tau1 + tau2)
? 1 - sprout::detail::pow2<type>((x - tau1) / tau2)
: 0
;
}
} // namespace compost
} // namespace sprout
#endif // #ifndef SPROUT_COMPOST_UTILITY_ROSENBERG_HPP