Struct wfm_draw_t¶

One rendered source instance: its timing AND the values it was actually rendered with. More...

#include <wfm_compose.h>

Public Attributes¶

Type	Name
size_t	delay
double	doppler
double	doppler_rate
double	f_end
double	freq
size_t	instance
double	level
size_t	off
size_t	on
size_t	seg
double	snr
size_t	src
size_t	start

Detailed Description¶

A wfm_span_t answers when; this answers when and what, for one source of one instance. The distinction is not academic. The SigMF sidecar used to build each annotation from two provenances timing replayed through wfm_compose_spans(), frequency and SNR read straight off the source struct, which for a ranged field still holds lo so every annotation of a --freq 11200:12800 --snr 8:14 scene claimed 11200 Hz and 8 dB beside a sample-accurate start. Measured against the capture itself: up to 1224 Hz and 6.0 dB out (doppler#1086). A 6 dB error is a different operating point, and nothing in the file revealed it.

An un-ranged field reports its scalar, so a consumer never branches on the ranged bitmask.

The spec keeps storing (lo, hi): replay is guaranteed by re-deriving the draw hash, not by recording the draw. "What does this spec permit" and "what did this run do" are different questions and one field cannot answer both which is why this is a separate call rather than a resolved spec.

Public Attributes Documentation¶

variable delay¶

size_t wfm_draw_t::delay;

variable doppler¶

double wfm_draw_t::doppler;

variable doppler_rate¶

double wfm_draw_t::doppler_rate;

variable f_end¶

double wfm_draw_t::f_end;

variable freq¶

double wfm_draw_t::freq;

variable instance¶

size_t wfm_draw_t::instance;

variable level¶

double wfm_draw_t::level;

variable off¶

size_t wfm_draw_t::off;

variable on¶

size_t wfm_draw_t::on;

variable seg¶

size_t wfm_draw_t::seg;

variable snr¶

double wfm_draw_t::snr;

variable src¶

size_t wfm_draw_t::src;

variable start¶

size_t wfm_draw_t::start;

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