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feat(plot): lock axes and calculate marker levels in dB

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Andrey
2026-09-04 13:50:20 +03:00
parent f6787163dc
commit d9eb7dd9ad
8 changed files with 42 additions and 6 deletions
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8
c/set-protocol/src/set_plot.c
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@@ -11,9 +11,9 @@ static int finite_values(const double *v, size_t n) {
uint32_t set_plot_abi_version(void) { return 1U; }
size_t set_plot_eval(uint32_t op, const double *v, size_t n, double *out, size_t cap) {
static const size_t sizes[] = {10, 3, 4, 4, 6, 2, 3};
static const size_t sizes[] = {10, 3, 4, 4, 6, 2, 3, 2};
double span, fraction;
if (op > SET_PLOT_DELTA || !v || !out || n != sizes[op] ||
if (op > SET_PLOT_DB_DELTA || !v || !out || n != sizes[op] ||
cap < (op == SET_PLOT_TRANSFORM ? 4U : 1U)) return 0;
if (op == SET_PLOT_TRANSFORM) {
double w, h, fx, fy;
@@ -65,6 +65,10 @@ size_t set_plot_eval(uint32_t op, const double *v, size_t n, double *out, size_t
break;
}
case SET_PLOT_DELTA: out[0] = (v[1] - v[0]) * v[2]; break;
case SET_PLOT_DB_DELTA:
if (v[0] == 0 || v[1] == 0) return 0;
out[0] = 20 * log10(fabs(v[1] / v[0]));
break;
default: return 0;
}
return isfinite(out[0]) ? 1 : 0;