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Only calculate deco stops, TTS and NDL every 30s

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This introduces a limiter that we only calculate deco stop, TTS and NDL
with a minimum of 30s intervall and just reused the values from the
previous sample in other cases.

I run my OSTC3 at 2s sample intervall so this is a 15x speedup in that
case.

Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Anton Lundin 2014-06-29 20:23:00 +02:00 committed by Dirk Hohndel
parent b2288e1e3d
commit 537beb319b
1 changed files with 12 additions and 0 deletions
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12
profile.c
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@ -1088,6 +1088,7 @@ void calculate_deco_information(struct dive *dive, struct divecomputer *dc, stru
int i;
double surface_pressure = (dc->surface_pressure.mbar ? dc->surface_pressure.mbar : get_surface_pressure_in_mbar(dive, true)) / 1000.0;
double tissue_tolerance = 0;
int last_ndl_tts_calc_time = 0;
for (i = 1; i < pi->nr; i++) {
struct plot_data *entry = pi->entry + i;
int j, t0 = (entry - 1)->sec, t1 = entry->sec;
@ -1112,6 +1113,17 @@ void calculate_deco_information(struct dive *dive, struct divecomputer *dc, stru
/* should we do more calculations?
* We don't for print-mode because this info doesn't show up there */
if (prefs.calcndltts && !print_mode) {
/* only calculate ndl/tts on every 30 seconds */
if ((entry->sec - last_ndl_tts_calc_time) < 30) {
struct plot_data *prev_entry = (entry - 1);
entry->stoptime_calc = prev_entry->stoptime_calc;
entry->stopdepth_calc = prev_entry->stopdepth_calc;
entry->tts_calc = prev_entry->tts_calc;
entry->ndl_calc = prev_entry->ndl_calc;
continue;
}
last_ndl_tts_calc_time = entry->sec;
/* We are going to mess up deco state, so store it for later restore */
char *cache_data = NULL;
cache_deco_state(tissue_tolerance, &cache_data);