diff options
Diffstat (limited to 'dive.c')
| -rw-r--r-- | dive.c | 42 |
1 files changed, 42 insertions, 0 deletions
@@ -5,6 +5,7 @@ #include <limits.h> #include "gettext.h" #include "dive.h" +#include "planner.h" struct tag_entry *g_tag_list = NULL; @@ -339,6 +340,47 @@ static void fixup_dc_duration(struct divecomputer *dc) } } +void per_cylinder_mean_depth(struct dive *dive, struct divecomputer *dc, int *mean, int *duration) +{ + int i; + int depthtime[MAX_CYLINDERS] = {0,}; + int lasttime = 0, lastdepth = 0; + int idx = 0; + + for (i = 0; i < MAX_CYLINDERS; i++) + mean[i] = duration[i] = 0; + struct event *ev = get_next_event(dc->events, "gaschange"); + if (!ev) { + // special case - no gas changes + mean[0] = dc->meandepth.mm; + duration[0] = dc->duration.seconds; + return; + } + for (i = 0; i < dc->samples; i++) { + struct sample *sample = dc->sample + i; + int time = sample->time.seconds; + int depth = sample->depth.mm; + if (ev && time >= ev->time.seconds) { + int o2 = (ev->value & 0xFFFF) * 10; + int he = (ev->value >> 16) * 10; + idx = get_gasidx(dive, o2, he); + ev = get_next_event(ev->next, "gaschange"); + } + + /* We ignore segments at the surface */ + if (depth > SURFACE_THRESHOLD || lastdepth > SURFACE_THRESHOLD) { + duration[idx] += time - lasttime; + depthtime[idx] += (time - lasttime) * (depth + lastdepth) / 2; + } + lastdepth = depth; + lasttime = time; + } + for (i = 0; i < MAX_CYLINDERS; i++) { + if (duration[i]) + mean[i] = (depthtime[i] + duration[i] / 2) / duration[i]; + } +} + static void fixup_pressure(struct dive *dive, struct sample *sample) { unsigned int pressure, index; |