Struct corr_state_t¶

1-D FFT correlator state. More...

#include <corr_core.h>

Public Attributes¶

Type	Name
float _Complex *	accum
size_t	count
size_t	dwell
fft_state_t *	fwd
fft_state_t *	inv
size_t	n
size_t	n_out
float _Complex *	ref_spec
float _Complex *	work_fft
float _Complex *	work_pad
float _Complex *	work_trunc

Detailed Description¶

Allocate with corr_create(); never stack-allocate. ref_spec/work_fft/accum are each n complex floats; work_pad (n_out) exists only on the decoupled-inverse path.

Public Attributes Documentation¶

variable accum¶

float _Complex* corr_state_t::accum;

Coherent product-spectrum accumulator.

variable count¶

size_t corr_state_t::count;

Frames accumulated so far (0 … dwell-1).

variable dwell¶

size_t corr_state_t::dwell;

Integration depth; dump every dwell calls.

variable fwd¶

fft_state_t* corr_state_t::fwd;

Forward plan (sign = -1) at n.

variable inv¶

fft_state_t* corr_state_t::inv;

Inverse plan (sign = +1) at n_out.

variable n¶

size_t corr_state_t::n;

FFT / reference length (samples).

variable n_out¶

size_t corr_state_t::n_out;

Output length (== n unless decoupled).

variable ref_spec¶

float _Complex* corr_state_t::ref_spec;

conj(FFT(ref)), pre-computed at create.

variable work_fft¶

float _Complex* corr_state_t::work_fft;

Scratch: FFT(in) · ref_spec (product).

variable work_pad¶

float _Complex* corr_state_t::work_pad;

Zero-padded product, n_out (NULL native).

variable work_trunc¶

float _Complex* corr_state_t::work_trunc;

Bounce buffer for a dump into an under-sized out (jm gh-138). The inverse FFT's plan is fixed at n_out, so it cannot write a partial surface a short out has to be served by inverting here and copying the prefix. Allocated lazily, because the sized path (everything the Python binding does) never needs it.

The documentation for this class was generated from the following file native/inc/corr/corr_core.h