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Fix 3-, 6- and 9-minute min/max calculations

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Make them use indices into the plot-info, fix calculation of average
depth, and fix and add comments.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Linus Torvalds 2016-04-20 15:12:53 -07:00 • committed by Dirk Hohndel
parent d7103f97f7
commit e0ac1c9a26
3 changed files with 61 additions and 36 deletions
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81
core/profile.c
View file

@ -196,46 +196,69 @@ static int get_local_sac(struct plot_data *entry1, struct plot_data *entry2, str
return airuse / atm * 60 / duration; return airuse / atm * 60 / duration;
} }
static void analyze_plot_info_minmax_minute(struct plot_data *entry, struct plot_data *first, struct plot_data *last, int index) /*
* We do three min/max/avg calculations: over 3, 6 and 9 minutes
* around the entry point (indices 0, 1, 2 respectively).
*/
static void analyze_plot_info_minmax_minute(struct plot_info *pi, int entry, int index)
{ {
struct plot_data *p = entry; struct plot_data *plot_entry = pi->entry + entry; // fixed
int time = entry->sec; struct plot_data *p = plot_entry; // moves with 'entry'
int seconds = 90 * (index + 1); int seconds = 90 * (index + 1);
struct plot_data *min, *max; int start = p->sec - seconds, end = p->sec + seconds;
int avg, nr; int min, max;
int firsttime, lasttime, lastdepth;
int depth_time_2;
/* Go back 'seconds' in time */ /* Go back 'seconds' in time */
while (p > first) { while (entry > 0) {
if (p[-1].sec < time - seconds) if (p[-1].sec < start)
break; break;
entry--;
p--; p--;
} }
// indexes to the min/max entries
min = max = entry;
// accumulated depth*time*2
depth_time_2 = 0;
firsttime = lasttime = p->sec;
lastdepth = p->depth;
/* Then go forward until we hit an entry past the time */ /* Then go forward until we hit an entry past the time */
min = max = p; while (entry < pi->nr) {
avg = p->depth; int time = p->sec;
nr = 1;
while (++p < last) {
int depth = p->depth; int depth = p->depth;
if (p->sec > time + seconds)
if (time > end)
break; break;
avg += depth;
nr++; depth_time_2 += (time - lasttime) * (depth + lastdepth);
if (depth < min->depth) lasttime = time;
min = p; lastdepth = depth;
if (depth > max->depth)
max = p; if (depth < pi->entry[min].depth)
min = entry;
if (depth > pi->entry[max].depth)
max = entry;
p++;
entry++;
} }
entry->min[index] = min;
entry->max[index] = max; plot_entry->min[index] = min;
entry->avg[index] = (avg + nr / 2) / nr; plot_entry->max[index] = max;
if (firsttime == lasttime)
plot_entry->avg[index] = pi->entry[min].depth;
else
plot_entry->avg[index] = depth_time_2 / 2 / (lasttime - firsttime);
} }
static void analyze_plot_info_minmax(struct plot_data *entry, struct plot_data *first, struct plot_data *last) static void analyze_plot_info_minmax(struct plot_info *pi, int entry)
{ {
analyze_plot_info_minmax_minute(entry, first, last, 0); analyze_plot_info_minmax_minute(pi, entry, 0);
analyze_plot_info_minmax_minute(entry, first, last, 1); analyze_plot_info_minmax_minute(pi, entry, 1);
analyze_plot_info_minmax_minute(entry, first, last, 2); analyze_plot_info_minmax_minute(pi, entry, 2);
} }
static velocity_t velocity(int speed) static velocity_t velocity(int speed)
@ -299,11 +322,9 @@ struct plot_info *analyze_plot_info(struct plot_info *pi)
} }
} }
/* One-, two- and three-minute minmax data */ /* 3, 6 and 9-minute minmax data */
for (i = 0; i < nr; i++) { for (i = 0; i < nr; i++)
struct plot_data *entry = pi->entry + i; analyze_plot_info_minmax(pi, i);
analyze_plot_info_minmax(entry, pi->entry, pi->entry + nr);
}
return pi; return pi;
} }

6
core/profile.h
View file

@ -50,9 +50,9 @@ struct plot_data {
double mod, ead, end, eadd; double mod, ead, end, eadd;
velocity_t velocity; velocity_t velocity;
int speed; int speed;
struct plot_data *min[3]; // stats over 3, 6, 9 minute windows:
struct plot_data *max[3]; int min[3], max[3]; // indices into pi->entry[]
int avg[3]; int avg[3]; // actual depth average
/* values calculated by us */ /* values calculated by us */
unsigned int in_deco_calc : 1; unsigned int in_deco_calc : 1;
int ndl_calc; int ndl_calc;

10
profile-widget/diveprofileitem.cpp
View file

@ -225,17 +225,21 @@ void DiveProfileItem::modelDataChanged(const QModelIndex &topLeft, const QModelI
int last = -1; int last = -1;
for (int i = 0, count = dataModel->rowCount(); i < count; i++) { for (int i = 0, count = dataModel->rowCount(); i < count; i++) {
struct plot_data *pd = dataModel->data().entry;
struct plot_data *entry = pd + i;
// "min/max[2]" are the 9-minute window min/max indices
struct plot_data *min_entry = pd + entry->min[2];
struct plot_data *max_entry = pd + entry->max[2];
struct plot_data *entry = dataModel->data().entry + i;
if (entry->depth < 2000) if (entry->depth < 2000)
continue; continue;
if ((entry == entry->max[2]) && entry->depth / 100 != last) { if ((entry == max_entry) && entry->depth / 100 != last) {
plot_depth_sample(entry, Qt::AlignHCenter | Qt::AlignBottom, getColor(SAMPLE_DEEP)); plot_depth_sample(entry, Qt::AlignHCenter | Qt::AlignBottom, getColor(SAMPLE_DEEP));
last = entry->depth / 100; last = entry->depth / 100;
} }
if ((entry == entry->min[2]) && entry->depth / 100 != last) { if ((entry == min_entry) && entry->depth / 100 != last) {
plot_depth_sample(entry, Qt::AlignHCenter | Qt::AlignTop, getColor(SAMPLE_SHALLOW)); plot_depth_sample(entry, Qt::AlignHCenter | Qt::AlignTop, getColor(SAMPLE_SHALLOW));
last = entry->depth / 100; last = entry->depth / 100;
} }