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add compost chorus effect.

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bolero-MURAKAMI 2012-11-11 08:26:58 +09:00
parent c7e6be98bb
commit aca22bec98
4 changed files with 161 additions and 4 deletions
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1
sprout/compost/effects.hpp
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@ -12,6 +12,7 @@
#include <sprout/compost/effects/compress.hpp>
#include <sprout/compost/effects/tremolo.hpp>
#include <sprout/compost/effects/vibrato.hpp>
#include <sprout/compost/effects/chorus.hpp>
#include <sprout/compost/effects/noise_gate.hpp>
#include <sprout/compost/effects/synthesize.hpp>

156
sprout/compost/effects/chorus.hpp Normal file
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@ -0,0 +1,156 @@
#ifndef SPROUT_COMPOST_EFFECTS_CHORUS_HPP
#define SPROUT_COMPOST_EFFECTS_CHORUS_HPP
#include <iterator>
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/container/functions.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>
#include <sprout/range/adaptor/valued.hpp>
namespace sprout {
namespace compost {
//
// chorus_outdirected_value
//
template<typename Value, typename IntType>
struct chorus_outdirected_value {
public:
typedef Value value_type;
typedef IntType int_type;
private:
value_type d_;
value_type depth_;
value_type rate_;
int_type samples_per_sec_;
private:
template<typename Outdirected>
SPROUT_CONSTEXPR typename std::iterator_traits<Outdirected>::value_type
calc_2(Outdirected const& x, typename Outdirected::index_type m, value_type const& delta) const {
return *x + (m >= 0 && (m + 1 < x.base().get() || x.base().get() < 0)
? delta * x[m + 1 - x.index()] + (1 - delta) * x[m - x.index()]
: 0
)
;
}
template<typename Outdirected>
SPROUT_CONSTEXPR typename std::iterator_traits<Outdirected>::value_type
calc_1(Outdirected const& x, value_type const& tau, value_type const& t) const {
return calc_2(x, static_cast<typename Outdirected::index_type>(t), t - static_cast<typename Outdirected::index_type>(t));
}
template<typename Outdirected>
SPROUT_CONSTEXPR typename std::iterator_traits<Outdirected>::value_type
calc(Outdirected const& x, value_type const& tau) const {
return calc_1(x, tau, x.index() - tau);
}
public:
SPROUT_CONSTEXPR chorus_outdirected_value(
value_type const& d, value_type const& depth, value_type const& rate,
int_type samples_per_sec = 44100
)
: d_(d), 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 calc(x, d_ + depth_ * sprout::math::sin(2 * sprout::math::pi<Value>() * rate_ * x.index() / samples_per_sec_));
}
};
namespace effects {
//
// chorus_holder
//
template<typename T, typename IntType = int>
class chorus_holder {
public:
typedef T value_type;
typedef IntType int_type;
private:
value_type d_;
value_type depth_;
value_type rate_;
int_type samples_per_sec_;
public:
chorus_holder() = default;
chorus_holder(chorus_holder const&) = default;
SPROUT_CONSTEXPR chorus_holder(
value_type const& d, value_type const& depth, value_type const& rate,
int_type samples_per_sec = 44100
)
: d_(d), depth_(depth), rate_(rate), samples_per_sec_(samples_per_sec)
{}
SPROUT_CONSTEXPR value_type const& d() const {
return d_;
}
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_;
}
};
//
// chorus_forwarder
//
class chorus_forwarder {
public:
template<typename T, typename IntType>
SPROUT_CONSTEXPR sprout::compost::effects::chorus_holder<T, IntType>
operator()(T const& d, T const& depth, T const& rate, IntType samples_per_sec) {
return sprout::compost::effects::chorus_holder<T, IntType>(d, depth, rate, samples_per_sec);
}
template<typename T>
SPROUT_CONSTEXPR sprout::compost::effects::chorus_holder<T>
operator()(T const& d, T const& depth, T const& rate) {
return sprout::compost::effects::chorus_holder<T>(d, depth, rate);
}
};
//
// chorus
//
namespace {
SPROUT_STATIC_CONSTEXPR sprout::compost::effects::chorus_forwarder chorus{};
} // anonymous-namespace
//
// operator|
//
template<typename Range, typename T, typename IntType>
inline SPROUT_CONSTEXPR auto
operator|(Range&& lhs, sprout::compost::effects::chorus_holder<T, IntType> const& rhs)
-> decltype(
sprout::forward<Range>(lhs)
| sprout::adaptors::valued(sprout::size(sprout::forward<Range>(lhs)))
| sprout::adaptors::indexed | sprout::adaptors::outdirected
| sprout::adaptors::transformed(
sprout::compost::chorus_outdirected_value<T, IntType>(
rhs.d(), rhs.depth(), rhs.rate(), rhs.samples_per_sec()
)
)
)
{
return sprout::forward<Range>(lhs)
| sprout::adaptors::valued(sprout::size(sprout::forward<Range>(lhs)))
| sprout::adaptors::indexed | sprout::adaptors::outdirected
| sprout::adaptors::transformed(
sprout::compost::chorus_outdirected_value<T, IntType>(
rhs.d(), rhs.depth(), rhs.rate(), rhs.samples_per_sec()
)
)
;
}
} // namespace effects
} // namespace compost
} // namespace sprout
#endif // #ifndef SPROUT_COMPOST_EFFECTS_CHORUS_HPP

2
sprout/compost/effects/vibrato.hpp
View file

@ -33,7 +33,7 @@ namespace sprout {
calc_2(Outdirected const& x, typename Outdirected::index_type m, value_type const& delta) const {
return m >= 0 && (m + 1 < x.base().get() || x.base().get() < 0)
? delta * x[m + 1 - x.index()] + (1 - delta) * x[m - x.index()]
: *x
: 0
;
}
template<typename Outdirected>

6
sprout/config/compiler/clang.hpp
View file

@ -21,8 +21,8 @@
# define SPROUT_NO_DELEGATING_CONSTRUCTORS
#endif
#if (__has_feature(cxx_constexpr) && (__GNUC__ >= 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && defined(__GXX_EXPERIMENTAL_CXX0X__))
# define SPROUT_HAS_CONSTEXPR_CMATH_FUNCTION
#endif
//#if (__has_feature(cxx_constexpr) && (__GNUC__ >= 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && defined(__GXX_EXPERIMENTAL_CXX0X__))
//# define SPROUT_HAS_CONSTEXPR_CMATH_FUNCTION
//#endif
#endif // #ifndef SPROUT_CONFIG_COMPILER_CLANG_HPP