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add some compost effects.

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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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117
sprout/compost/effects/tremolo.hpp Normal file
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#ifndef SPROUT_COMPOST_EFFECTS_TREMOLO_HPP
#define SPROUT_COMPOST_EFFECTS_TREMOLO_HPP
#include <iterator>
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/math/constants.hpp>
#include <sprout/math/sin.hpp>
#include <sprout/range/adaptor/transformed.hpp>
#include <sprout/range/adaptor/outdirected.hpp>
#include <sprout/range/adaptor/indexed.hpp>
namespace sprout {
namespace compost {
//
// tremolo_outdirected_value
//
template<typename Value, typename IntType>
struct tremolo_outdirected_value {
public:
typedef Value value_type;
typedef IntType int_type;
private:
value_type depth_;
value_type rate_;
int_type samples_per_sec_;
public:
SPROUT_CONSTEXPR tremolo_outdirected_value(value_type const& depth, value_type const& rate, int_type samples_per_sec = 44100)
: depth_(depth), rate_(rate), samples_per_sec_(samples_per_sec)
{}
template<typename Outdirected>
SPROUT_CONSTEXPR typename std::iterator_traits<Outdirected>::value_type
operator()(Outdirected const& x) const {
return (1 + depth_ * sprout::math::sin(2 * sprout::math::pi<Value>() * rate_ * x.index() / samples_per_sec_)) * *x;
}
};
namespace effects {
//
// tremolo_holder
//
template<typename T, typename IntType = int>
class tremolo_holder {
public:
typedef T value_type;
typedef IntType int_type;
private:
value_type depth_;
value_type rate_;
int_type samples_per_sec_;
public:
tremolo_holder() = default;
tremolo_holder(tremolo_holder const&) = default;
SPROUT_CONSTEXPR tremolo_holder(value_type const& depth, value_type const& rate, int_type samples_per_sec = 44100)
: depth_(depth), rate_(rate), samples_per_sec_(samples_per_sec)
{}
SPROUT_CONSTEXPR value_type const& depth() const {
return depth_;
}
SPROUT_CONSTEXPR value_type const& rate() const {
return rate_;
}
SPROUT_CONSTEXPR int_type const& samples_per_sec() const {
return samples_per_sec_;
}
};
//
// tremolo_forwarder
//
class tremolo_forwarder {
public:
template<typename T, typename IntType>
SPROUT_CONSTEXPR sprout::compost::effects::tremolo_holder<T, IntType>
operator()(T const& depth, T const& rate, IntType samples_per_sec) {
return sprout::compost::effects::tremolo_holder<T, IntType>(depth, rate, samples_per_sec);
}
template<typename T>
SPROUT_CONSTEXPR sprout::compost::effects::tremolo_holder<T>
operator()(T const& depth, T const& rate) {
return sprout::compost::effects::tremolo_holder<T>(depth, rate);
}
};
//
// tremolo
//
namespace {
SPROUT_STATIC_CONSTEXPR sprout::compost::effects::tremolo_forwarder tremolo{};
} // anonymous-namespace
//
// operator|
//
template<typename Range, typename T, typename IntType>
inline SPROUT_CONSTEXPR auto
operator|(Range&& lhs, sprout::compost::effects::tremolo_holder<T, IntType> const& rhs)
-> decltype(
sprout::forward<Range>(lhs)
| sprout::adaptors::indexed | sprout::adaptors::outdirected
| sprout::adaptors::transformed(
sprout::compost::tremolo_outdirected_value<T, IntType>(rhs.depth(), rhs.rate(), rhs.samples_per_sec())
)
)
{
return sprout::forward<Range>(lhs)
| sprout::adaptors::indexed | sprout::adaptors::outdirected
| sprout::adaptors::transformed(
sprout::compost::tremolo_outdirected_value<T, IntType>(rhs.depth(), rhs.rate(), rhs.samples_per_sec())
)
;
}
} // namespace effects
} // namespace compost
} // namespace sprout
#endif // #ifndef SPROUT_COMPOST_EFFECTS_TREMOLO_HPP