Class expression_parallel_goertzel¶

`class` expression_parallel_goertzel<T, width> dsp ¶

template <typename T, size_t width>
struct expression_parallel_goertzel : expression_traits_defaults { … }

Parallel (multi-bin) Goertzel algorithm expression.

Template parameters
T	Sample and result type (floating point).
width	Number of parallel resonators (must match the SIMD vector width used to construct the expression).

Parameters
result	Array of `width` complex values (filled on destruction).
omega	SIMD vector of `width` angular frequencies [rad/sample].

Note

Results are only valid after the expression object has been destroyed.

`variable` dims ¶

constexpr static size_t dims = 1

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::dims

Declared at dsp/goertzel.hpp:127

`typedef` value_type ¶

using value_type = T

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::value_type

Declared at dsp/goertzel.hpp:129

`function` get_shape(const expression_parallel_goertzel<T, width> &) ¶

constexpr static shape<1> get_shape(const expression_parallel_goertzel&) { … }

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::get_shape(const expression_parallel_goertzel<T, width> &)

Declared at dsp/goertzel.hpp:131

`function` get_shape() ¶

constexpr static shape<1> get_shape() { … }

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::get_shape()

Declared at dsp/goertzel.hpp:135

`constructor` expression_parallel_goertzel<T, width>(complex<T> *, vec<T, width>) ¶

expression_parallel_goertzel(complex<T> result[], vec<T, width> omega)

Construct width parallel Goertzel resonators.

Parameters
result	Output array of `width` complex bin values (filled on destruction).
omega	SIMD vector of `width` angular frequencies [rad/sample].

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::expression_parallel_goertzel<T, width>(complex<T> *, vec<T, width>)

Declared at dsp/goertzel.hpp:142

`destructor` ~expression_parallel_goertzel<T, width>() ¶

~expression_parallel_goertzel()

Destructor: rotates the final filter states into the width complex DFT bin values and stores them in result .

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::~expression_parallel_goertzel<T, width>()

Declared at dsp/goertzel.hpp:150

`function` set_elements(expression_parallel_goertzel<T, width> &, shape<1>, axis_params<VecAxis, N>, const std::type_identity_t<vec<T, N>> &) ¶

template <size_t N, index_t VecAxis>
friend KFR_INTRINSIC void set_elements(expression_parallel_goertzel& self, shape<1>,
                                       axis_params<VecAxis, N>, const std::type_identity_t<vec<T, N>>& x)

Internal ADL-provided implementation for expression_parallel_goertzel expressions.

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::set_elements(expression_parallel_goertzel<T, width> &, shape<1>, axis_params<VecAxis, N>, const std::type_identity_t<vec<T, N>> &)

Declared at dsp/goertzel.hpp:164

`variable` result ¶

complex<T>* result

Output array of

width complex bin values.

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::result

Declared at dsp/goertzel.hpp:176

`variable` omega ¶

const vec<T, width> omega

SIMD vector of target angular frequencies.

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::omega

Declared at dsp/goertzel.hpp:177

`variable` coeff ¶

const vec<T, width> coeff

Precomputed coefficients

2*cos(omega) .

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::coeff

Declared at dsp/goertzel.hpp:178

`variable` q0 ¶

mutable vec<T, width> q0

Current filter outputs (working state).

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::q0

Declared at dsp/goertzel.hpp:179

`variable` q1 ¶

mutable vec<T, width> q1

Previous output samples (working state).

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::q1

Declared at dsp/goertzel.hpp:180

`variable` q2 ¶

mutable vec<T, width> q2

Output samples two steps back (working state).

Fully qualified name: kfr::expression_parallel_goertzel<T, width>::q2

Declared at dsp/goertzel.hpp:181

Fully qualified name: kfr::expression_parallel_goertzel<T, width>

Declared at dsp/goertzel.hpp:125

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Class expression_parallel_goertzel¶