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sourcestats: add function to correct accumulated offsets

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This will be needed to follow server time corrections in order to
better estimate frequency.
This commit is contained in:
Miroslav Lichvar
2021-11-10 15:34:26 +01:00
parent 0bf39c0ab9
commit 72f7d09f58
2 changed files with 20 additions and 0 deletions
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16
sourcestats.c
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@@ -779,6 +779,22 @@ SST_SlewSamples(SST_Stats inst, struct timespec *when, double dfreq, double doff
/* ================================================== */
void
SST_CorrectOffset(SST_Stats inst, double doffset)
{
int i;
if (!inst->n_samples)
return;
for (i = -inst->runs_samples; i < inst->n_samples; i++)
inst->offsets[get_runsbuf_index(inst, i)] += doffset;
inst->estimated_offset += doffset;
}
/* ================================================== */
void
SST_AddDispersion(SST_Stats inst, double dispersion)
{

4
sourcestats.h
View File

@@ -102,6 +102,10 @@ SST_GetTrackingData(SST_Stats inst, struct timespec *ref_time,
extern void SST_SlewSamples(SST_Stats inst, struct timespec *when, double dfreq, double doffset);
/* This routine corrects already accumulated samples to improve the
frequency estimate when a new sample is accumulated */
extern void SST_CorrectOffset(SST_Stats inst, double doffset);
/* This routine is called when an indeterminate offset is introduced
into the local time. */
extern void SST_AddDispersion(SST_Stats inst, double dispersion);