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add some compost effects.

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This commit is contained in:
bolero-MURAKAMI 2012-11-09 22:33:11 +09:00
parent d01ee064e2
commit c7e6be98bb
20 changed files with 1815 additions and 6 deletions
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106
sprout/compost/effects/overdrive.hpp Normal file
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#ifndef SPROUT_COMPOST_EFFECTS_OVERDRIVE_HPP
#define SPROUT_COMPOST_EFFECTS_OVERDRIVE_HPP
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/math/constants.hpp>
#include <sprout/math/atan.hpp>
#include <sprout/range/adaptor/transformed.hpp>
#include <sprout/compost/effects/change_volume.hpp>
namespace sprout {
namespace compost {
//
// overdrive_clip_value
//
template<typename T = void>
struct overdrive_clip_value {
public:
typedef T argument_type;
typedef T result_type;
public:
SPROUT_CONSTEXPR T
operator()(T const& x) const {
return x >= 0 ? sprout::math::atan(x) / sprout::math::half_pi<T>()
: sprout::math::atan(x) / sprout::math::half_pi<T>() / 10
;
}
};
template<>
struct overdrive_clip_value<void> {
public:
template<typename T>
SPROUT_CONSTEXPR T
operator()(T const& x) const {
return sprout::compost::overdrive_clip_value<T>()(x);
}
};
namespace effects {
//
// overdrive_holder
//
template<typename T>
class overdrive_holder {
public:
typedef T value_type;
private:
value_type gain_;
value_type level_;
public:
overdrive_holder() = default;
overdrive_holder(overdrive_holder const&) = default;
SPROUT_CONSTEXPR overdrive_holder(value_type const& gain, value_type const& level)
: gain_(gain) , level_(level)
{}
SPROUT_CONSTEXPR value_type const& gain() const {
return gain_;
}
SPROUT_CONSTEXPR value_type const& level() const {
return level_;
}
};
//
// overdriven_forwarder
//
class overdriven_forwarder {
public:
template<typename T>
SPROUT_CONSTEXPR sprout::compost::effects::overdrive_holder<T>
operator()(T const& gain, T const& level) {
return sprout::compost::effects::overdrive_holder<T>(gain, level);
}
};
//
// overdriven
//
namespace {
SPROUT_STATIC_CONSTEXPR sprout::compost::effects::overdriven_forwarder overdriven{};
} // anonymous-namespace
//
// operator|
//
template<typename Range, typename T>
inline SPROUT_CONSTEXPR auto
operator|(Range&& lhs, sprout::compost::effects::overdrive_holder<T> const& rhs)
-> decltype(
sprout::forward<Range>(lhs)
| sprout::compost::effects::changed_volume(rhs.gain())
| sprout::adaptors::transformed(sprout::compost::overdrive_clip_value<>())
| sprout::compost::effects::changed_volume(rhs.level())
)
{
return sprout::forward<Range>(lhs)
| sprout::compost::effects::changed_volume(rhs.gain())
| sprout::adaptors::transformed(sprout::compost::overdrive_clip_value<>())
| sprout::compost::effects::changed_volume(rhs.level())
;
}
} // namespace effects
} // namespace compost
} // namespace sprout
#endif // #ifndef SPROUT_COMPOST_EFFECTS_OVERDRIVE_HPP