// SPDX-License-Identifier: GPL-2.0
/* profile.c */
/* creates all the necessary data for drawing the dive profile
*/
#include "ssrf.h"
#include "gettext.h"
#include <limits.h>
#include <string.h>
#include <assert.h>
#include "dive.h"
#include "subsurface-string.h"
#include "display.h"
#include "divelist.h"
#include "profile.h"
#include "gaspressures.h"
#include "deco.h"
#include "libdivecomputer/parser.h"
#include "libdivecomputer/version.h"
#include "membuffer.h"
#include "qthelper.h"
#include "format.h"
//#define DEBUG_GAS 1
#define MAX_PROFILE_DECO 7200
extern int ascent_velocity(int depth, int avg_depth, int bottom_time);
struct dive *current_dive = NULL;
unsigned int dc_number = 0;
#ifdef DEBUG_PI
/* debugging tool - not normally used */
static void dump_pi(struct plot_info *pi)
{
int i;
printf("pi:{nr:%d maxtime:%d meandepth:%d maxdepth:%d \n"
" maxpressure:%d mintemp:%d maxtemp:%d\n",
pi->nr, pi->maxtime, pi->meandepth, pi->maxdepth,
pi->maxpressure, pi->mintemp, pi->maxtemp);
for (i = 0; i < pi->nr; i++) {
struct plot_data *entry = &pi->entry[i];
printf(" entry[%d]:{cylinderindex:%d sec:%d pressure:{%d,%d}\n"
" time:%d:%02d temperature:%d depth:%d stopdepth:%d stoptime:%d ndl:%d smoothed:%d po2:%lf phe:%lf pn2:%lf sum-pp %lf}\n",
i, entry->sensor[0], entry->sec,
entry->pressure[0], entry->pressure[1],
entry->sec / 60, entry->sec % 60,
entry->temperature, entry->depth, entry->stopdepth, entry->stoptime, entry->ndl, entry->smoothed,
entry->pressures.o2, entry->pressures.he, entry->pressures.n2,
entry->pressures.o2 + entry->pressures.he + entry->pressures.n2);
}
printf(" }\n");
}
#endif
#define ROUND_UP(x, y) ((((x) + (y) - 1) / (y)) * (y))
#define DIV_UP(x, y) (((x) + (y) - 1) / (y))
/*
* When showing dive profiles, we scale things to the
* current dive. However, we don't scale past less than
* 30 minutes or 90 ft, just so that small dives show
* up as such unless zoom is enabled.
* We also need to add 180 seconds at the end so the min/max
* plots correctly
*/
int get_maxtime(const struct plot_info *pi)
{
int seconds = pi->maxtime;
int DURATION_THR = (pi->dive_type == FREEDIVING ? 60 : 600);
int CEILING = (pi->dive_type == FREEDIVING ? 30 : 60);
if (prefs.zoomed_plot) {
/* Rounded up to one minute, with at least 2.5 minutes to
* spare.
* For dive times shorter than 10 minutes, we use seconds/4 to
* calculate the space dynamically.
* This is seamless since 600/4 = 150.
*/
if (seconds < DURATION_THR)
return ROUND_UP(seconds + seconds / 4, CEILING);
else
return ROUND_UP(seconds + DURATION_THR/4, CEILING);
} else {
#ifndef SUBSURFACE_MOBILE
/* min 30 minutes, rounded up to 5 minutes, with at least 2.5 minutes to spare */
return MAX(30 * 60, ROUND_UP(seconds + DURATION_THR/4, CEILING * 5));
#else
/* just add 2.5 minutes so we have a consistant right margin */
return seconds + DURATION_THR / 4;
#endif
}
}
/* get the maximum depth to which we want to plot
* take into account the additional vertical space needed to plot
* partial pressure graphs */
int get_maxdepth(const struct plot_info *pi)
{
unsigned mm = pi->maxdepth;
int md;
if (prefs.zoomed_plot) {
/* Rounded up to 10m, with at least 3m to spare */
md = ROUND_UP(mm + 3000, 10000);
} else {
/* Minimum 30m, rounded up to 10m, with at least 3m to spare */
md = MAX((unsigned)30000, ROUND_UP(mm + 3000, 10000));
}
md += lrint(pi->maxpp * 9000);
return md;
}
/* collect all event names and whether we display them */
struct ev_select *ev_namelist;
int evn_allocated;
int evn_used;
void clear_events(void)
{
for (int i = 0; i < evn_used; i++)
free(ev_namelist[i].ev_name);
evn_used = 0;
}
void remember_event(const char *eventname)
{
int i = 0, len;
if (!eventname || (len = strlen(eventname)) == 0)
return;
while (i < evn_used) {
if (!strncmp(eventname, ev_namelist[i].ev_name, len))
return;
i++;
}
if (evn_used == evn_allocated) {
evn_allocated += 10;
ev_namelist = realloc(ev_namelist, evn_allocated * sizeof(struct ev_select));
if (!ev_namelist)
/* we are screwed, but let's just bail out */
return;
}
ev_namelist[evn_used].ev_name = strdup(eventname);
ev_namelist[evn_used].plot_ev = true;
evn_used++;
}
/* UNUSED! */
static int get_local_sac(struct plot_info *pi, int idx1, int idx2, struct dive *dive) __attribute__((unused));
/* Get local sac-rate (in ml/min) between entry1 and entry2 */
static int get_local_sac(struct plot_info *pi, int idx1, int idx2, struct dive *dive)
{
int index = 0;
cylinder_t *cyl;
struct plot_data *entry1 = pi->entry + idx1;
struct plot_data *entry2 = pi->entry + idx2;
int duration = entry2->sec - entry1->sec;
int depth, airuse;
pressure_t a, b;
double atm;
if (duration <= 0)
return 0;
a.mbar = get_plot_pressure(pi, idx1, 0);
b.mbar = get_plot_pressure(pi, idx2, 0);
if (!b.mbar || a.mbar <= b.mbar)
return 0;
/* Mean pressure in ATM */
depth = (entry1->depth + entry2->depth) / 2;
atm = depth_to_atm(depth, dive);
cyl = get_cylinder(dive, index);
airuse = gas_volume(cyl, a) - gas_volume(cyl, b);
/* milliliters per minute */
return lrint(airuse / atm * 60 / duration);
}
#define HALF_INTERVAL 9 * 30
/*
* Run the min/max calculations: over a 9 minute interval
* around the entry point (indices 0, 1, 2 respectively).
*/
static void analyze_plot_info_minmax(struct plot_info *pi, int entry_index)
{
struct plot_data *plot_entry = pi->entry + entry_index; // fixed
struct plot_data *p = plot_entry; // moves with 'entry'
int start = p->sec - HALF_INTERVAL, end = p->sec + HALF_INTERVAL;
int min, max;
/* Go back 'seconds' in time */
while (entry_index > 0) {
if (p[-1].sec < start)
break;
entry_index--;
p--;
}
// indices to the min/max entries
min = max = entry_index;
/* Then go forward until we hit an entry past the time */
while (entry_index < pi->nr) {
int time = p->sec;
int depth = p->depth;
if (time > end)
break;
if (depth < pi->entry[min].depth)
min = entry_index;
if (depth > pi->entry[max].depth)
max = entry_index;
p++;
entry_index++;
}
plot_entry->min = min;
plot_entry->max = max;
}
static velocity_t velocity(int speed)
{
velocity_t v;
if (speed < -304) /* ascent faster than -60ft/min */
v = CRAZY;
else if (speed < -152) /* above -30ft/min */
v = FAST;
else if (speed < -76) /* -15ft/min */
v = MODERATE;
else if (speed < -25) /* -5ft/min */
v = SLOW;
else if (speed < 25) /* very hard to find data, but it appears that the recommendations
for descent are usually about 2x ascent rate; still, we want
stable to mean stable */
v = STABLE;
else if (speed < 152) /* between 5 and 30ft/min is considered slow */
v = SLOW;
else if (speed < 304) /* up to 60ft/min is moderate */
v = MODERATE;
else if (speed < 507) /* up to 100ft/min is fast */
v = FAST;
else /* more than that is just crazy - you'll blow your ears out */
v = CRAZY;
return v;
}
static void analyze_plot_info(struct plot_info *pi)
{
int i;
int nr = pi->nr;
/* Smoothing function: 5-point triangular smooth */
for (i = 2; i < nr; i++) {
struct plot_data *entry = pi->entry + i;
int depth;
if (i < nr - 2) {
depth = entry[-2].depth + 2 * entry[-1].depth + 3 * entry[0].depth + 2 * entry[1].depth + entry[2].depth;
entry->smoothed = (depth + 4) / 9;
}
/* vertical velocity in mm/sec */
/* Linus wants to smooth this - let's at least look at the samples that aren't FAST or CRAZY */
if (entry[0].sec - entry[-1].sec) {
entry->speed = (entry[0].depth - entry[-1].depth) / (entry[0].sec - entry[-1].sec);
entry->velocity = velocity(entry->speed);
/* if our samples are short and we aren't too FAST*/
if (entry[0].sec - entry[-1].sec < 15 && entry->velocity < FAST) {
int past = -2;
while (i + past > 0 && entry[0].sec - entry[past].sec < 15)
past--;
entry->velocity = velocity((entry[0].depth - entry[past].depth) /
(entry[0].sec - entry[past].sec));
}
} else {
entry->velocity = STABLE;
entry->speed = 0;
}
}
/* get minmax data */
for (i = 0; i < nr; i++)
analyze_plot_info_minmax(pi, i);
}
/*
* If the event has an explicit cylinder index,
* we return that. If it doesn't, we return the best
* match based on the gasmix.
*
* Some dive computers give cylinder indices, some
* give just the gas mix.
*/
int get_cylinder_index(const struct dive *dive, const struct event *ev)
{
int best;
struct gasmix mix;
if (ev->gas.index >= 0)
return ev->gas.index;
/*
* This should no longer happen!
*
* We now match up gas change events with their cylinders at dive
* event fixup time.
*/
SSRF_INFO("Still looking up cylinder based on gas mix in get_cylinder_index()!\n");
mix = get_gasmix_from_event(dive, ev);
best = find_best_gasmix_match(mix, &dive->cylinders);
return best < 0 ? 0 : best;
}
struct event *get_next_event_mutable(struct event *event, const char *name)
{
if (!name || !*name)
return NULL;
while (event) {
if (same_string(event->name, name))
return event;
event = event->next;
}
return event;
}
const struct event *get_next_event(const struct event *event, const char *name)
{
return get_next_event_mutable((struct event *)event, name);
}
static int count_events(struct divecomputer *dc)
{
int result = 0;
struct event *ev = dc->events;
while (ev != NULL) {
result++;
ev = ev->next;
}
return result;
}
static int set_setpoint(struct plot_info *pi, int i, int setpoint, int end)
{
while (i < pi->nr) {
struct plot_data *entry = pi->entry + i;
if (entry->sec > end)
break;
entry->o2pressure.mbar = setpoint;
i++;
}
return i;
}
static void check_setpoint_events(const struct dive *dive, struct divecomputer *dc, struct plot_info *pi)
{
UNUSED(dive);
int i = 0;
pressure_t setpoint;
setpoint.mbar = 0;
const struct event *ev = get_next_event(dc->events, "SP change");
if (!ev)
return;
do {
i = set_setpoint(pi, i, setpoint.mbar, ev->time.seconds);
setpoint.mbar = ev->value;
if (setpoint.mbar)
dc->divemode = CCR;
ev = get_next_event(ev->next, "SP change");
} while (ev);
set_setpoint(pi, i, setpoint.mbar, INT_MAX);
}
static void calculate_max_limits_new(struct dive *dive, struct divecomputer *given_dc, struct plot_info *pi)
{
struct divecomputer *dc = &(dive->dc);
bool seen = false;
bool found_sample_beyond_last_event = false;
int maxdepth = dive->maxdepth.mm;
int maxtime = 0;
int maxpressure = 0, minpressure = INT_MAX;
int maxhr = 0, minhr = INT_MAX;
int mintemp = dive->mintemp.mkelvin;
int maxtemp = dive->maxtemp.mkelvin;
int cyl;
/* Get the per-cylinder maximum pressure if they are manual */
for (cyl = 0; cyl < dive->cylinders.nr; cyl++) {
int mbar_start = get_cylinder(dive, cyl)->start.mbar;
int mbar_end = get_cylinder(dive, cyl)->end.mbar;
if (mbar_start > maxpressure)
maxpressure = mbar_start;
if (mbar_end < minpressure)
minpressure = mbar_end;
}
/* Then do all the samples from all the dive computers */
do {
if (dc == given_dc)
seen = true;
int i = dc->samples;
int lastdepth = 0;
struct sample *s = dc->sample;
struct event *ev;
/* Make sure we can fit all events */
ev = dc->events;
while (ev) {
if (ev->time.seconds > maxtime)
maxtime = ev->time.seconds;
ev = ev->next;
}
while (--i >= 0) {
int depth = s->depth.mm;
int pressure = s->pressure[0].mbar;
int temperature = s->temperature.mkelvin;
int heartbeat = s->heartbeat;
if (!mintemp && temperature < mintemp)
mintemp = temperature;
if (temperature > maxtemp)
maxtemp = temperature;
if (pressure && pressure < minpressure)
minpressure = pressure;
if (pressure > maxpressure)
maxpressure = pressure;
if (heartbeat > maxhr)
maxhr = heartbeat;
if (heartbeat && heartbeat < minhr)
minhr = heartbeat;
if (depth > maxdepth)
maxdepth = s->depth.mm;
/* Make sure that we get the first sample beyond the last event.
* If maxtime is somewhere in the middle of the last segment,
* populate_plot_entries() gets confused leading to display artifacts. */
if ((depth > SURFACE_THRESHOLD || lastdepth > SURFACE_THRESHOLD || in_planner() || !found_sample_beyond_last_event) &&
s->time.seconds > maxtime) {
found_sample_beyond_last_event = true;
maxtime = s->time.seconds;
}
lastdepth = depth;
s++;
}
dc = dc->next;
if (dc == NULL && !seen) {
dc = given_dc;
seen = true;
}
} while (dc != NULL);
if (minpressure > maxpressure)
minpressure = 0;
if (minhr > maxhr)
minhr = maxhr;
memset(pi, 0, sizeof(*pi));
pi->maxdepth = maxdepth;
pi->maxtime = maxtime;
pi->maxpressure = maxpressure;
pi->minpressure = minpressure;
pi->minhr = minhr;
pi->maxhr = maxhr;
pi->mintemp = mintemp;
pi->maxtemp = maxtemp;
}
/* copy the previous entry (we know this exists), update time and depth
* and zero out the sensor pressure (since this is a synthetic entry)
* increment the entry pointer and the count of synthetic entries. */
static void insert_entry(struct plot_info *pi, int idx, int time, int depth, int sac)
{
struct plot_data *entry = pi->entry + idx;
struct plot_data *prev = pi->entry + idx - 1;
*entry = *prev;
entry->sec = time;
entry->depth = depth;
entry->running_sum = prev->running_sum + (time - prev->sec) * (depth + prev->depth) / 2;
entry->sac = sac;
entry->ndl = -1;
entry->bearing = -1;
}
void free_plot_info_data(struct plot_info *pi)
{
free(pi->entry);
free(pi->pressures);
pi->entry = NULL;
pi->pressures = NULL;
}
static void populate_plot_entries(struct dive *dive, struct divecomputer *dc, struct plot_info *pi)
{
UNUSED(dive);
int idx, maxtime, nr, i;
int lastdepth, lasttime, lasttemp = 0;
struct plot_data *plot_data;
struct event *ev = dc->events;
maxtime = pi->maxtime;
/*
* We want to have a plot_info event at least every 10s (so "maxtime/10+1"),
* but samples could be more dense than that (so add in dc->samples). We also
* need to have one for every event (so count events and add that) and
* additionally we want two surface events around the whole thing (thus the
* additional 4). There is also one extra space for a final entry
* that has time > maxtime (because there can be surface samples
* past "maxtime" in the original sample data)
*/
nr = dc->samples + 6 + maxtime / 10 + count_events(dc);
plot_data = calloc(nr, sizeof(struct plot_data));
pi->entry = plot_data;
pi->nr_cylinders = dive->cylinders.nr;
pi->pressures = calloc(nr * (size_t)pi->nr_cylinders, sizeof(struct plot_pressure_data));
if (!plot_data)
return;
pi->nr = nr;
idx = 2; /* the two extra events at the start */
lastdepth = 0;
lasttime = 0;
/* skip events at time = 0 */
while (ev && ev->time.seconds == 0)
ev = ev->next;
for (i = 0; i < dc->samples; i++) {
struct plot_data *entry = plot_data + idx;
struct sample *sample = dc->sample + i;
int time = sample->time.seconds;
int offset, delta;
int depth = sample->depth.mm;
int sac = sample->sac.mliter;
/* Add intermediate plot entries if required */
delta = time - lasttime;
if (delta <= 0) {
time = lasttime;
delta = 1; // avoid divide by 0
}
for (offset = 10; offset < delta; offset += 10) {
if (lasttime + offset > maxtime)
break;
/* Add events if they are between plot entries */
while (ev && (int)ev->time.seconds < lasttime + offset) {
insert_entry(pi, idx, ev->time.seconds, interpolate(lastdepth, depth, ev->time.seconds - lasttime, delta), sac);
entry++;
idx++;
ev = ev->next;
}
/* now insert the time interpolated entry */
insert_entry(pi, idx, lasttime + offset, interpolate(lastdepth, depth, offset, delta), sac);
entry++;
idx++;
/* skip events that happened at this time */
while (ev && (int)ev->time.seconds == lasttime + offset)
ev = ev->next;
}
/* Add events if they are between plot entries */
while (ev && (int)ev->time.seconds < time) {
insert_entry(pi, idx, ev->time.seconds, interpolate(lastdepth, depth, ev->time.seconds - lasttime, delta), sac);
entry++;
idx++;
ev = ev->next;
}
entry->sec = time;
entry->depth = depth;
entry->running_sum = (entry - 1)->running_sum + (time - (entry - 1)->sec) * (depth + (entry - 1)->depth) / 2;
entry->stopdepth = sample->stopdepth.mm;
entry->stoptime = sample->stoptime.seconds;
entry->ndl = sample->ndl.seconds;
entry->tts = sample->tts.seconds;
entry->in_deco = sample->in_deco;
entry->cns = sample->cns;
if (dc->divemode == CCR || (dc->divemode == PSCR && dc->no_o2sensors)) {
entry->o2pressure.mbar = entry->o2setpoint.mbar = sample->setpoint.mbar; // for rebreathers
entry->o2sensor[0].mbar = sample->o2sensor[0].mbar; // for up to three rebreather O2 sensors
entry->o2sensor[1].mbar = sample->o2sensor[1].mbar;
entry->o2sensor[2].mbar = sample->o2sensor[2].mbar;
} else {
entry->pressures.o2 = sample->setpoint.mbar / 1000.0;
}
if (sample->pressure[0].mbar)
set_plot_pressure_data(pi, idx, SENSOR_PR, sample->sensor[0], sample->pressure[0].mbar);
if (sample->pressure[1].mbar)
set_plot_pressure_data(pi, idx, SENSOR_PR, sample->sensor[1], sample->pressure[1].mbar);
if (sample->temperature.mkelvin)
entry->temperature = lasttemp = sample->temperature.mkelvin;
else
entry->temperature = lasttemp;
entry->heartbeat = sample->heartbeat;
entry->bearing = sample->bearing.degrees;
entry->sac = sample->sac.mliter;
if (sample->rbt.seconds)
entry->rbt = sample->rbt.seconds;
/* skip events that happened at this time */
while (ev && (int)ev->time.seconds == time)
ev = ev->next;
lasttime = time;
lastdepth = depth;
idx++;
if (time > maxtime)
break;
}
/* Add any remaining events */
while (ev) {
struct plot_data *entry = plot_data + idx;
int time = ev->time.seconds;
if (time > lasttime) {
insert_entry(pi, idx, ev->time.seconds, 0, 0);
lasttime = time;
idx++;
entry++;
}
ev = ev->next;
}
/* Add two final surface events */
plot_data[idx++].sec = lasttime + 1;
plot_data[idx++].sec = lasttime + 2;
pi->nr = idx;
}
/*
* Calculate the sac rate between the two plot entries 'first' and 'last'.
*
* Everything in between has a cylinder pressure for at least some of the cylinders.
*/
static int sac_between(struct dive *dive, struct plot_info *pi, int first, int last, const bool gases[])
{
int i, airuse;
double pressuretime;
if (first == last)
return 0;
/* Get airuse for the set of cylinders over the range */
airuse = 0;
for (i = 0; i < pi->nr_cylinders; i++) {
pressure_t a, b;
cylinder_t *cyl;
int cyluse;
if (!gases[i])
continue;
a.mbar = get_plot_pressure(pi, first, i);
b.mbar = get_plot_pressure(pi, last, i);
cyl = get_cylinder(dive, i);
cyluse = gas_volume(cyl, a) - gas_volume(cyl, b);
if (cyluse > 0)
airuse += cyluse;
}
if (!airuse)
return 0;
/* Calculate depthpressure integrated over time */
pressuretime = 0.0;
do {
struct plot_data *entry = pi->entry + first;
struct plot_data *next = entry + 1;
int depth = (entry->depth + next->depth) / 2;
int time = next->sec - entry->sec;
double atm = depth_to_atm(depth, dive);
pressuretime += atm * time;
} while (++first < last);
/* Turn "atmseconds" into "atmminutes" */
pressuretime /= 60;
/* SAC = mliter per minute */
return lrint(airuse / pressuretime);
}
/* Is there pressure data for all gases? */
static bool all_pressures(struct plot_info *pi, int idx, const bool gases[])
{
int i;
for (i = 0; i < pi->nr_cylinders; i++) {
if (gases[i] && !get_plot_pressure(pi, idx, i))
return false;
}
return true;
}
/* Which of the set of gases have pressure data? Returns false if none of them. */
static bool filter_pressures(struct plot_info *pi, int idx, const bool gases_in[], bool gases_out[])
{
int i;
bool has_pressure = false;
for (i = 0; i < pi->nr_cylinders; i++) {
gases_out[i] = gases_in[i] && get_plot_pressure(pi, idx, i);
has_pressure |= gases_out[i];
}
return has_pressure;
}
/*
* Try to do the momentary sac rate for this entry, averaging over one
* minute. This is premature optimization, but instead of allocating
* an array of gases, the caller passes in scratch memory in the last
* argument.
*/
static void fill_sac(struct dive *dive, struct plot_info *pi, int idx, const bool gases_in[], bool gases[])
{
struct plot_data *entry = pi->entry + idx;
int first, last;
int time;
if (entry->sac)
return;
/*
* We may not have pressure data for all the cylinders,
* but we'll calculate the SAC for the ones we do have.
*/
if (!filter_pressures(pi, idx, gases_in, gases))
return;
/*
* Try to go back 30 seconds to get 'first'.
* Stop if the cylinder pressure data set changes.
*/
first = idx;
time = entry->sec - 30;
while (idx > 0) {
struct plot_data *entry = pi->entry + idx;
struct plot_data *prev = pi->entry + idx - 1;
if (prev->depth < SURFACE_THRESHOLD && entry->depth < SURFACE_THRESHOLD)
break;
if (prev->sec < time)
break;
if (!all_pressures(pi, idx - 1, gases))
break;
idx--;
first = idx;
}
/* Now find an entry a minute after the first one */
last = first;
time = pi->entry[first].sec + 60;
while (++idx < pi->nr) {
struct plot_data *entry = pi->entry + last;
struct plot_data *next = pi->entry + last + 1;
if (next->depth < SURFACE_THRESHOLD && entry->depth < SURFACE_THRESHOLD)
break;
if (next->sec > time)
break;
if (!all_pressures(pi, idx + 1, gases))
break;
last = idx;
}
/* Ok, now calculate the SAC between 'first' and 'last' */
entry->sac = sac_between(dive, pi, first, last, gases);
}
/*
* Create a bitmap of cylinders that match our current gasmix
*/
static void matching_gases(struct dive *dive, struct gasmix gasmix, bool gases[])
{
int i;
for (i = 0; i < dive->cylinders.nr; i++)
gases[i] = same_gasmix(gasmix, get_cylinder(dive, i)->gasmix);
}
static void calculate_sac(struct dive *dive, struct divecomputer *dc, struct plot_info *pi)
{
struct gasmix gasmix = gasmix_invalid;
const struct event *ev = NULL;
bool *gases, *gases_scratch;
gases = calloc(pi->nr_cylinders, sizeof(*gases));
/* This might be premature optimization, but let's allocate the gas array for
* the fill_sac function only once an not once per sample */
gases_scratch = malloc(pi->nr_cylinders * sizeof(*gases));
for (int i = 0; i < pi->nr; i++) {
struct plot_data *entry = pi->entry + i;
struct gasmix newmix = get_gasmix(dive, dc, entry->sec, &ev, gasmix);
if (!same_gasmix(newmix, gasmix)) {
gasmix = newmix;
matching_gases(dive, newmix, gases);
}
fill_sac(dive, pi, i, gases, gases_scratch);
}
free(gases);
free(gases_scratch);
}
static void populate_secondary_sensor_data(const struct divecomputer *dc, struct plot_info *pi)
{
UNUSED(dc);
UNUSED(pi);
/* We should try to see if it has interesting pressure data here */
}
/*
* This adds a pressure entry to the plot_info based on the gas change
* information and the manually filled in pressures.
*/
static void add_plot_pressure(struct plot_info *pi, int time, int cyl, pressure_t p)
{
for (int i = 0; i < pi->nr; i++) {
if (i == pi->nr - 1 || pi->entry[i].sec >= time) {
set_plot_pressure_data(pi, i, SENSOR_PR, cyl, p.mbar);
return;
}
}
}
static void setup_gas_sensor_pressure(const struct dive *dive, const struct divecomputer *dc, struct plot_info *pi)
{
int prev, i;
const struct event *ev;
if (pi->nr_cylinders == 0)
return;
int *seen = malloc(pi->nr_cylinders * sizeof(*seen));
int *first = malloc(pi->nr_cylinders * sizeof(*first));
int *last = malloc(pi->nr_cylinders * sizeof(*last));
const struct divecomputer *secondary;
for (i = 0; i < pi->nr_cylinders; i++) {
seen[i] = 0;
first[i] = 0;
last[i] = INT_MAX;
}
prev = explicit_first_cylinder(dive, dc);
seen[prev] = 1;
for (ev = get_next_event(dc->events, "gaschange"); ev != NULL; ev = get_next_event(ev->next, "gaschange")) {
int cyl = ev->gas.index;
int sec = ev->time.seconds;
if (cyl < 0)
continue;
last[prev] = sec;
prev = cyl;
last[cyl] = sec;
if (!seen[cyl]) {
// The end time may be updated by a subsequent cylinder change
first[cyl] = sec;
seen[cyl] = 1;
}
}
last[prev] = INT_MAX;
// Fill in "seen[]" array - mark cylinders we're not interested
// in as negative.
for (i = 0; i < pi->nr_cylinders; i++) {
const cylinder_t *cyl = get_cylinder(dive, i);
int start = cyl->start.mbar;
int end = cyl->end.mbar;
/*
* Fundamentally uninteresting?
*
* A dive computer with no pressure data isn't interesting
* to plot pressures for even if we've seen it..
*/
if (!start || !end || start == end) {
seen[i] = -1;
continue;
}
/* If we've seen it, we're definitely interested */
if (seen[i])
continue;
/* If it's only mentioned by other dc's, ignore it */
for_each_dc(dive, secondary) {
if (has_gaschange_event(dive, secondary, i)) {
seen[i] = -1;
break;
}
}
}
for (i = 0; i < pi->nr_cylinders; i++) {
if (seen[i] >= 0) {
const cylinder_t *cyl = get_cylinder(dive, i);
add_plot_pressure(pi, first[i], i, cyl->start);
add_plot_pressure(pi, last[i], i, cyl->end);
}
}
/*
* Here, we should try to walk through all the dive computers,
* and try to see if they have sensor data different from the
* primary dive computer (dc).
*/
secondary = &dive->dc;
do {
if (secondary == dc)
continue;
populate_secondary_sensor_data(dc, pi);
} while ((secondary = secondary->next) != NULL);
free(seen);
free(first);
free(last);
}
#ifndef SUBSURFACE_MOBILE
/* calculate DECO STOP / TTS / NDL */
static void calculate_ndl_tts(struct deco_state *ds, const struct dive *dive, struct plot_data *entry, struct gasmix gasmix, double surface_pressure,enum divemode_t divemode)
{
/* should this be configurable? */
/* ascent speed up to first deco stop */
const int ascent_s_per_step = 1;
const int ascent_s_per_deco_step = 1;
/* how long time steps in deco calculations? */
const int time_stepsize = 60;
const int deco_stepsize = 3000;
/* at what depth is the current deco-step? */
int next_stop = ROUND_UP(deco_allowed_depth(
tissue_tolerance_calc(ds, dive, depth_to_bar(entry->depth, dive)),
surface_pressure, dive, 1), deco_stepsize);
int ascent_depth = entry->depth;
/* at what time should we give up and say that we got enuff NDL? */
/* If iterating through a dive, entry->tts_calc needs to be reset */
entry->tts_calc = 0;
/* If we don't have a ceiling yet, calculate ndl. Don't try to calculate
* a ndl for lower values than 3m it would take forever */
if (next_stop == 0) {
if (entry->depth < 3000) {
entry->ndl = MAX_PROFILE_DECO;
return;
}
/* stop if the ndl is above max_ndl seconds, and call it plenty of time */
while (entry->ndl_calc < MAX_PROFILE_DECO &&
deco_allowed_depth(tissue_tolerance_calc(ds, dive, depth_to_bar(entry->depth, dive)),
surface_pressure, dive, 1) <= 0
) {
entry->ndl_calc += time_stepsize;
add_segment(ds, depth_to_bar(entry->depth, dive),
gasmix, time_stepsize, entry->o2pressure.mbar, divemode, prefs.bottomsac);
}
/* we don't need to calculate anything else */
return;
}
/* We are in deco */
entry->in_deco_calc = true;
/* Add segments for movement to stopdepth */
for (; ascent_depth > next_stop; ascent_depth -= ascent_s_per_step * ascent_velocity(ascent_depth, entry->running_sum / entry->sec, 0), entry->tts_calc += ascent_s_per_step) {
add_segment(ds, depth_to_bar(ascent_depth, dive),
gasmix, ascent_s_per_step, entry->o2pressure.mbar, divemode, prefs.decosac);
next_stop = ROUND_UP(deco_allowed_depth(tissue_tolerance_calc(ds, dive, depth_to_bar(ascent_depth, dive)),
surface_pressure, dive, 1), deco_stepsize);
}
ascent_depth = next_stop;
/* And how long is the current deco-step? */
entry->stoptime_calc = 0;
entry->stopdepth_calc = next_stop;
next_stop -= deco_stepsize;
/* And how long is the total TTS */
while (next_stop >= 0) {
/* save the time for the first stop to show in the graph */
if (ascent_depth == entry->stopdepth_calc)
entry->stoptime_calc += time_stepsize;
entry->tts_calc += time_stepsize;
if (entry->tts_calc > MAX_PROFILE_DECO)
break;
add_segment(ds, depth_to_bar(ascent_depth, dive),
gasmix, time_stepsize, entry->o2pressure.mbar, divemode, prefs.decosac);
if (deco_allowed_depth(tissue_tolerance_calc(ds, dive, depth_to_bar(ascent_depth,dive)), surface_pressure, dive, 1) <= next_stop) {
/* move to the next stop and add the travel between stops */
for (; ascent_depth > next_stop; ascent_depth -= ascent_s_per_deco_step * ascent_velocity(ascent_depth, entry->running_sum / entry->sec, 0), entry->tts_calc += ascent_s_per_deco_step)
add_segment(ds, depth_to_bar(ascent_depth, dive),
gasmix, ascent_s_per_deco_step, entry->o2pressure.mbar, divemode, prefs.decosac);
ascent_depth = next_stop;
next_stop -= deco_stepsize;
}
}
}
/* Let's try to do some deco calculations.
*/
void calculate_deco_information(struct deco_state *ds, const struct deco_state *planner_ds, const struct dive *dive, const struct divecomputer *dc, struct plot_info *pi, bool print_mode)
{
int i, count_iteration = 0;
double surface_pressure = (dc->surface_pressure.mbar ? dc->surface_pressure.mbar : get_surface_pressure_in_mbar(dive, true)) / 1000.0;
bool first_iteration = true;
int prev_deco_time = 10000000, time_deep_ceiling = 0;
if (!in_planner() || !planner_ds) {
ds->deco_time = 0;
ds->first_ceiling_pressure.mbar = 0;
} else {
ds->deco_time = planner_ds->deco_time;
ds->first_ceiling_pressure = planner_ds->first_ceiling_pressure;
}
struct deco_state *cache_data_initial = NULL;
lock_planner();
/* For VPM-B outside the planner, cache the initial deco state for CVA iterations */
if (decoMode() == VPMB) {
cache_deco_state(ds, &cache_data_initial);
}
/* For VPM-B outside the planner, iterate until deco time converges (usually one or two iterations after the initial)
* Set maximum number of iterations to 10 just in case */
while ((abs(prev_deco_time - ds->deco_time) >= 30) && (count_iteration < 10)) {
int last_ndl_tts_calc_time = 0, first_ceiling = 0, current_ceiling, last_ceiling = 0, final_tts = 0 , time_clear_ceiling = 0;
if (decoMode() == VPMB)
ds->first_ceiling_pressure.mbar = depth_to_mbar(first_ceiling, dive);
struct gasmix gasmix = gasmix_invalid;
const struct event *ev = NULL, *evd = NULL;
enum divemode_t current_divemode = UNDEF_COMP_TYPE;
for (i = 1; i < pi->nr; i++) {
struct plot_data *entry = pi->entry + i;
int j, t0 = (entry - 1)->sec, t1 = entry->sec;
int time_stepsize = 20;
current_divemode = get_current_divemode(dc, entry->sec, &evd, ¤t_divemode);
gasmix = get_gasmix(dive, dc, t1, &ev, gasmix);
entry->ambpressure = depth_to_bar(entry->depth, dive);
entry->gfline = get_gf(ds, entry->ambpressure, dive) * (100.0 - AMB_PERCENTAGE) + AMB_PERCENTAGE;
if (t0 > t1) {
SSRF_INFO("non-monotonous dive stamps %d %d\n", t0, t1);
int xchg = t1;
t1 = t0;
t0 = xchg;
}
if (t0 != t1 && t1 - t0 < time_stepsize)
time_stepsize = t1 - t0;
for (j = t0 + time_stepsize; j <= t1; j += time_stepsize) {
int depth = interpolate(entry[-1].depth, entry[0].depth, j - t0, t1 - t0);
add_segment(ds, depth_to_bar(depth, dive),
gasmix, time_stepsize, entry->o2pressure.mbar, current_divemode, entry->sac);
entry->icd_warning = ds->icd_warning;
if ((t1 - j < time_stepsize) && (j < t1))
time_stepsize = t1 - j;
}
if (t0 == t1) {
entry->ceiling = (entry - 1)->ceiling;
} else {
/* Keep updating the VPM-B gradients until the start of the ascent phase of the dive. */
if (decoMode() == VPMB && last_ceiling >= first_ceiling && first_iteration == true) {
nuclear_regeneration(ds, t1);
vpmb_start_gradient(ds);
/* For CVA iterations, calculate next gradient */
if (!first_iteration || in_planner())
vpmb_next_gradient(ds, ds->deco_time, surface_pressure / 1000.0);
}
entry->ceiling = deco_allowed_depth(tissue_tolerance_calc(ds, dive, depth_to_bar(entry->depth, dive)), surface_pressure, dive, !prefs.calcceiling3m);
if (prefs.calcceiling3m)
current_ceiling = deco_allowed_depth(tissue_tolerance_calc(ds, dive, depth_to_bar(entry->depth, dive)), surface_pressure, dive, true);
else
current_ceiling = entry->ceiling;
last_ceiling = current_ceiling;
/* If using VPM-B, take first_ceiling_pressure as the deepest ceiling */
if (decoMode() == VPMB) {
if (current_ceiling >= first_ceiling ||
(time_deep_ceiling == t0 && entry->depth == (entry - 1)->depth)) {
time_deep_ceiling = t1;
first_ceiling = current_ceiling;
ds->first_ceiling_pressure.mbar = depth_to_mbar(first_ceiling, dive);
if (first_iteration) {
nuclear_regeneration(ds, t1);
vpmb_start_gradient(ds);
/* For CVA calculations, deco time = dive time remaining is a good guess,
but we want to over-estimate deco_time for the first iteration so it
converges correctly, so add 30min*/
if (!in_planner())
ds->deco_time = pi->maxtime - t1 + 1800;
vpmb_next_gradient(ds, ds->deco_time, surface_pressure / 1000.0);
}
}
// Use the point where the ceiling clears as the end of deco phase for CVA calculations
if (current_ceiling > 0)
time_clear_ceiling = 0;
else if (time_clear_ceiling == 0 && t1 > time_deep_ceiling)
time_clear_ceiling = t1;
}
}
entry->surface_gf = 0.0;
entry->current_gf = 0.0;
for (j = 0; j < 16; j++) {
double m_value = ds->buehlmann_inertgas_a[j] + entry->ambpressure / ds->buehlmann_inertgas_b[j];
double surface_m_value = ds->buehlmann_inertgas_a[j] + surface_pressure / ds->buehlmann_inertgas_b[j];
entry->ceilings[j] = deco_allowed_depth(ds->tolerated_by_tissue[j], surface_pressure, dive, 1);
double current_gf = (ds->tissue_inertgas_saturation[j] - entry->ambpressure) / (m_value - entry->ambpressure);
entry->percentages[j] = ds->tissue_inertgas_saturation[j] < entry->ambpressure ?
lrint(ds->tissue_inertgas_saturation[j] / entry->ambpressure * AMB_PERCENTAGE) :
lrint(AMB_PERCENTAGE + current_gf * (100.0 - AMB_PERCENTAGE));
if (current_gf > entry->current_gf)
entry->current_gf = current_gf;
double surface_gf = 100.0 * (ds->tissue_inertgas_saturation[j] - surface_pressure) / (surface_m_value - surface_pressure);
if (surface_gf > entry->surface_gf)
entry->surface_gf = surface_gf;
}
/* should we do more calculations?
* We don't for print-mode because this info doesn't show up there
* If the ceiling hasn't cleared by the last data point, we need tts for VPM-B CVA calculation
* It is not necessary to do these calculation on the first VPMB iteration, except for the last data point */
if ((prefs.calcndltts && !print_mode && (decoMode() != VPMB || in_planner() || !first_iteration)) ||
(decoMode() == VPMB && !in_planner() && i == pi->nr - 1)) {
/* only calculate ndl/tts on every 30 seconds */
if ((entry->sec - last_ndl_tts_calc_time) < 30 && i != pi->nr - 1) {
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 */
struct deco_state *cache_data = NULL;
cache_deco_state(ds, &cache_data);
calculate_ndl_tts(ds, dive, entry, gasmix, surface_pressure, current_divemode);
if (decoMode() == VPMB && !in_planner() && i == pi->nr - 1)
final_tts = entry->tts_calc;
/* Restore "real" deco state for next real time step */
restore_deco_state(cache_data, ds, decoMode() == VPMB);
free(cache_data);
}
}
if (decoMode() == VPMB && !in_planner()) {
int this_deco_time;
prev_deco_time = ds->deco_time;
// Do we need to update deco_time?
if (final_tts > 0)
ds->deco_time = last_ndl_tts_calc_time + final_tts - time_deep_ceiling;
else if (time_clear_ceiling > 0)
/* Consistent with planner, deco_time ends after ascending (20s @9m/min from 3m)
* at end of whole minute after clearing ceiling. The deepest ceiling when planning a dive
* comes typically 10-60s after the end of the bottom time, so add 20s to the calculated
* deco time. */
ds->deco_time = ROUND_UP(time_clear_ceiling - time_deep_ceiling + 20, 60) + 20;
vpmb_next_gradient(ds, ds->deco_time, surface_pressure / 1000.0);
final_tts = 0;
last_ndl_tts_calc_time = 0;
first_ceiling = 0;
first_iteration = false;
count_iteration ++;
this_deco_time = ds->deco_time;
restore_deco_state(cache_data_initial, ds, true);
ds->deco_time = this_deco_time;
} else {
// With Buhlmann iterating isn't needed. This makes the while condition false.
prev_deco_time = ds->deco_time = 0;
}
}
free(cache_data_initial);
#if DECO_CALC_DEBUG & 1
dump_tissues(ds);
#endif
unlock_planner();
}
#endif
/* Function calculate_ccr_po2: This function takes information from one plot_data structure (i.e. one point on
* the dive profile), containing the oxygen sensor values of a CCR system and, for that plot_data structure,
* calculates the po2 value from the sensor data. Several rules are applied, depending on how many o2 sensors
* there are and the differences among the readings from these sensors.
*/
static int calculate_ccr_po2(struct plot_data *entry, struct divecomputer *dc)
{
int sump = 0, minp = 999999, maxp = -999999;
int diff_limit = 100; // The limit beyond which O2 sensor differences are considered significant (default = 100 mbar)
int i, np = 0;
for (i = 0; i < dc->no_o2sensors; i++)
if (entry->o2sensor[i].mbar) { // Valid reading
++np;
sump += entry->o2sensor[i].mbar;
minp = MIN(minp, entry->o2sensor[i].mbar);
maxp = MAX(maxp, entry->o2sensor[i].mbar);
}
switch (np) {
case 0: // Uhoh
return entry->o2pressure.mbar;
case 1: // Return what we have
return sump;
case 2: // Take the average
return sump / 2;
case 3: // Voting logic
if (2 * maxp - sump + minp < diff_limit) { // Upper difference acceptable...
if (2 * minp - sump + maxp) // ...and lower difference acceptable
return sump / 3;
else
return (sump - minp) / 2;
} else {
if (2 * minp - sump + maxp) // ...but lower difference acceptable
return (sump - maxp) / 2;
else
return sump / 3;
}
default: // This should not happen
assert(np <= 3);
return 0;
}
}
static void calculate_gas_information_new(struct dive *dive, struct divecomputer *dc, struct plot_info *pi)
{
int i;
double amb_pressure;
struct gasmix gasmix = gasmix_invalid;
const struct event *evg = NULL, *evd = NULL;
enum divemode_t current_divemode = UNDEF_COMP_TYPE;
for (i = 1; i < pi->nr; i++) {
int fn2, fhe;
struct plot_data *entry = pi->entry + i;
gasmix = get_gasmix(dive, dc, entry->sec, &evg, gasmix);
amb_pressure = depth_to_bar(entry->depth, dive);
current_divemode = get_current_divemode(dc, entry->sec, &evd, ¤t_divemode);
fill_pressures(&entry->pressures, amb_pressure, gasmix, (current_divemode == OC) ? 0.0 : entry->o2pressure.mbar / 1000.0, current_divemode);
fn2 = (int)(1000.0 * entry->pressures.n2 / amb_pressure);
fhe = (int)(1000.0 * entry->pressures.he / amb_pressure);
if (dc->divemode == PSCR) { // OC pO2 is calulated for PSCR with or without external PO2 monitoring.
struct gasmix gasmix2 = get_gasmix(dive, dc, entry->sec, &evg, gasmix);
entry->scr_OC_pO2.mbar = (int) depth_to_mbar(entry->depth, dive) * get_o2(gasmix2) / 1000;
}
/* Calculate MOD, EAD, END and EADD based on partial pressures calculated before
* so there is no difference in calculating between OC and CC
* END takes O₂ + N₂ (air) into account ("Narcotic" for trimix dives)
* EAD just uses N₂ ("Air" for nitrox dives) */
pressure_t modpO2 = { .mbar = (int)(prefs.modpO2 * 1000) };
entry->mod = (double)gas_mod(gasmix, modpO2, dive, 1).mm;
entry->end = (entry->depth + 10000) * (1000 - fhe) / 1000.0 - 10000;
entry->ead = (entry->depth + 10000) * fn2 / (double)N2_IN_AIR - 10000;
entry->eadd = (entry->depth + 10000) *
(entry->pressures.o2 / amb_pressure * O2_DENSITY +
entry->pressures.n2 / amb_pressure * N2_DENSITY +
entry->pressures.he / amb_pressure * HE_DENSITY) /
(O2_IN_AIR * O2_DENSITY + N2_IN_AIR * N2_DENSITY) * 1000 - 10000;
entry->density = gas_density(gasmix, depth_to_mbar(entry->depth, dive));
if (entry->mod < 0)
entry->mod = 0;
if (entry->ead < 0)
entry->ead = 0;
if (entry->end < 0)
entry->end = 0;
if (entry->eadd < 0)
entry->eadd = 0;
}
}
void fill_o2_values(struct dive *dive, struct divecomputer *dc, struct plot_info *pi)
/* In the samples from each dive computer, there may be uninitialised oxygen
* sensor or setpoint values, e.g. when events were inserted into the dive log
* or if the dive computer does not report o2 values with every sample. But
* for drawing the profile a complete series of valid o2 pressure values is
* required. This function takes the oxygen sensor data and setpoint values
* from the structures of plotinfo and replaces the zero values with their
* last known values so that the oxygen sensor data are complete and ready
* for plotting. This function called by: create_plot_info_new() */
{
int i, j;
pressure_t last_sensor[3], o2pressure;
pressure_t amb_pressure;
for (i = 0; i < pi->nr; i++) {
struct plot_data *entry = pi->entry + i;
if (dc->divemode == CCR || (dc->divemode == PSCR && dc->no_o2sensors)) {
if (i == 0) { // For 1st iteration, initialise the last_sensor values
for (j = 0; j < dc->no_o2sensors; j++)
last_sensor[j].mbar = pi->entry->o2sensor[j].mbar;
} else { // Now re-insert the missing oxygen pressure values
for (j = 0; j < dc->no_o2sensors; j++)
if (entry->o2sensor[j].mbar)
last_sensor[j].mbar = entry->o2sensor[j].mbar;
else
entry->o2sensor[j].mbar = last_sensor[j].mbar;
} // having initialised the empty o2 sensor values for this point on the profile,
amb_pressure.mbar = depth_to_mbar(entry->depth, dive);
o2pressure.mbar = calculate_ccr_po2(entry, dc); // ...calculate the po2 based on the sensor data
entry->o2pressure.mbar = MIN(o2pressure.mbar, amb_pressure.mbar);
} else {
entry->o2pressure.mbar = 0; // initialise po2 to zero for dctype = OC
}
}
}
#ifdef DEBUG_GAS
/* A CCR debug function that writes the cylinder pressure and the oxygen values to the file debug_print_profiledata.dat:
* Called in create_plot_info_new()
*/
static void debug_print_profiledata(struct plot_info *pi)
{
FILE *f1;
struct plot_data *entry;
int i;
if (!(f1 = fopen("debug_print_profiledata.dat", "w"))) {
printf("File open error for: debug_print_profiledata.dat\n");
} else {
fprintf(f1, "id t1 gas gasint t2 t3 dil dilint t4 t5 setpoint sensor1 sensor2 sensor3 t6 po2 fo2\n");
for (i = 0; i < pi->nr; i++) {
entry = pi->entry + i;
fprintf(f1, "%d gas=%8d %8d ; dil=%8d %8d ; o2_sp= %d %d %d %d PO2= %f\n", i, get_plot_sensor_pressure(pi, i),
get_plot_interpolated_pressure(pi, i), O2CYLINDER_PRESSURE(entry), INTERPOLATED_O2CYLINDER_PRESSURE(entry),
entry->o2pressure.mbar, entry->o2sensor[0].mbar, entry->o2sensor[1].mbar, entry->o2sensor[2].mbar, entry->pressures.o2);
}
fclose(f1);
}
}
#endif
/*
* Initialize a plot_info structure to all-zeroes
*/
void init_plot_info(struct plot_info *pi)
{
memset(pi, 0, sizeof(*pi));
}
/*
* Create a plot-info with smoothing and ranged min/max
*
* This also makes sure that we have extra empty events on both
* sides, so that you can do end-points without having to worry
* about it.
*
* The old data will be freed. Before the first call, the plot
* info must be initialized with init_plot_info().
*/
void create_plot_info_new(struct dive *dive, struct divecomputer *dc, struct plot_info *pi, bool fast, const struct deco_state *planner_ds)
{
int o2, he, o2max;
#ifndef SUBSURFACE_MOBILE
struct deco_state plot_deco_state;
init_decompression(&plot_deco_state, dive);
#else
UNUSED(planner_ds);
#endif
free_plot_info_data(pi);
calculate_max_limits_new(dive, dc, pi);
get_dive_gas(dive, &o2, &he, &o2max);
if (dc->divemode == FREEDIVE){
pi->dive_type = FREEDIVE;
} else if (he > 0) {
pi->dive_type = TRIMIX;
} else {
if (o2)
pi->dive_type = NITROX;
else
pi->dive_type = AIR;
}
populate_plot_entries(dive, dc, pi);
check_setpoint_events(dive, dc, pi); /* Populate setpoints */
setup_gas_sensor_pressure(dive, dc, pi); /* Try to populate our gas pressure knowledge */
if (!fast) {
for (int cyl = 0; cyl < pi->nr_cylinders; cyl++)
populate_pressure_information(dive, dc, pi, cyl);
}
fill_o2_values(dive, dc, pi); /* .. and insert the O2 sensor data having 0 values. */
calculate_sac(dive, dc, pi); /* Calculate sac */
#ifndef SUBSURFACE_MOBILE
calculate_deco_information(&plot_deco_state, planner_ds, dive, dc, pi, false); /* and ceiling information, using gradient factor values in Preferences) */
#endif
calculate_gas_information_new(dive, dc, pi); /* Calculate gas partial pressures */
#ifdef DEBUG_GAS
debug_print_profiledata(pi);
#endif
pi->meandepth = dive->dc.meandepth.mm;
analyze_plot_info(pi);
}
struct divecomputer *select_dc(struct dive *dive)
{
unsigned int max = number_of_computers(dive);
unsigned int i = dc_number;
/* Reset 'dc_number' if we've switched dives and it is now out of range */
if (i >= max)
dc_number = i = 0;
return get_dive_dc(dive, i);
}
static void plot_string(const struct plot_info *pi, int idx, struct membuffer *b)
{
int pressurevalue, mod, ead, end, eadd;
const char *depth_unit, *pressure_unit, *temp_unit, *vertical_speed_unit;
double depthvalue, tempvalue, speedvalue, sacvalue;
int decimals, cyl;
const char *unit;
const struct plot_data *entry = pi->entry + idx;
depthvalue = get_depth_units(entry->depth, NULL, &depth_unit);
put_format_loc(b, translate("gettextFromC", "@: %d:%02d\nD: %.1f%s\n"), FRACTION(entry->sec, 60), depthvalue, depth_unit);
for (cyl = 0; cyl < pi->nr_cylinders; cyl++) {
int mbar = get_plot_pressure(pi, idx, cyl);
if (!mbar)
continue;
struct gasmix mix = get_cylinder(&displayed_dive, cyl)->gasmix;
pressurevalue = get_pressure_units(mbar, &pressure_unit);
put_format_loc(b, translate("gettextFromC", "P: %d%s (%s)\n"), pressurevalue, pressure_unit, gasname(mix));
}
if (entry->temperature) {
tempvalue = get_temp_units(entry->temperature, &temp_unit);
put_format_loc(b, translate("gettextFromC", "T: %.1f%s\n"), tempvalue, temp_unit);
}
speedvalue = get_vertical_speed_units(abs(entry->speed), NULL, &vertical_speed_unit);
/* Ascending speeds are positive, descending are negative */
if (entry->speed > 0)
speedvalue *= -1;
put_format_loc(b, translate("gettextFromC", "V: %.1f%s\n"), speedvalue, vertical_speed_unit);
sacvalue = get_volume_units(entry->sac, &decimals, &unit);
if (entry->sac && prefs.show_sac)
put_format_loc(b, translate("gettextFromC", "SAC: %.*f%s/min\n"), decimals, sacvalue, unit);
if (entry->cns)
put_format_loc(b, translate("gettextFromC", "CNS: %u%%\n"), entry->cns);
if (prefs.pp_graphs.po2 && entry->pressures.o2 > 0) {
put_format_loc(b, translate("gettextFromC", "pO₂: %.2fbar\n"), entry->pressures.o2);
if (entry->scr_OC_pO2.mbar)
put_format_loc(b, translate("gettextFromC", "SCR ΔpO₂: %.2fbar\n"), entry->scr_OC_pO2.mbar/1000.0 - entry->pressures.o2);
}
if (prefs.pp_graphs.pn2 && entry->pressures.n2 > 0)
put_format_loc(b, translate("gettextFromC", "pN₂: %.2fbar\n"), entry->pressures.n2);
if (prefs.pp_graphs.phe && entry->pressures.he > 0)
put_format_loc(b, translate("gettextFromC", "pHe: %.2fbar\n"), entry->pressures.he);
if (prefs.mod && entry->mod > 0) {
mod = lrint(get_depth_units(lrint(entry->mod), NULL, &depth_unit));
put_format_loc(b, translate("gettextFromC", "MOD: %d%s\n"), mod, depth_unit);
}
eadd = lrint(get_depth_units(lrint(entry->eadd), NULL, &depth_unit));
if (prefs.ead) {
switch (pi->dive_type) {
case NITROX:
if (entry->ead > 0) {
ead = lrint(get_depth_units(lrint(entry->ead), NULL, &depth_unit));
put_format_loc(b, translate("gettextFromC", "EAD: %d%s\nEADD: %d%s / %.1fg/ℓ\n"), ead, depth_unit, eadd, depth_unit, entry->density);
break;
}
case TRIMIX:
if (entry->end > 0) {
end = lrint(get_depth_units(lrint(entry->end), NULL, &depth_unit));
put_format_loc(b, translate("gettextFromC", "END: %d%s\nEADD: %d%s / %.1fg/ℓ\n"), end, depth_unit, eadd, depth_unit, entry->density);
break;
}
case AIR:
if (entry->density > 0) {
put_format_loc(b, translate("gettextFromC", "Density: %.1fg/ℓ\n"), entry->density);
}
case FREEDIVING:
/* nothing */
break;
}
}
if (entry->stopdepth) {
depthvalue = get_depth_units(entry->stopdepth, NULL, &depth_unit);
if (entry->ndl > 0) {
/* this is a safety stop as we still have ndl */
if (entry->stoptime)
put_format_loc(b, translate("gettextFromC", "Safety stop: %umin @ %.0f%s\n"), DIV_UP(entry->stoptime, 60),
depthvalue, depth_unit);
else
put_format_loc(b, translate("gettextFromC", "Safety stop: unknown time @ %.0f%s\n"),
depthvalue, depth_unit);
} else {
/* actual deco stop */
if (entry->stoptime)
put_format_loc(b, translate("gettextFromC", "Deco: %umin @ %.0f%s\n"), DIV_UP(entry->stoptime, 60),
depthvalue, depth_unit);
else
put_format_loc(b, translate("gettextFromC", "Deco: unknown time @ %.0f%s\n"),
depthvalue, depth_unit);
}
} else if (entry->in_deco) {
put_string(b, translate("gettextFromC", "In deco\n"));
} else if (entry->ndl >= 0) {
put_format_loc(b, translate("gettextFromC", "NDL: %umin\n"), DIV_UP(entry->ndl, 60));
}
if (entry->tts)
put_format_loc(b, translate("gettextFromC", "TTS: %umin\n"), DIV_UP(entry->tts, 60));
if (entry->stopdepth_calc && entry->stoptime_calc) {
depthvalue = get_depth_units(entry->stopdepth_calc, NULL, &depth_unit);
put_format_loc(b, translate("gettextFromC", "Deco: %umin @ %.0f%s (calc)\n"), DIV_UP(entry->stoptime_calc, 60),
depthvalue, depth_unit);
} else if (entry->in_deco_calc) {
/* This means that we have no NDL left,
* and we have no deco stop,
* so if we just accend to the surface slowly
* (ascent_mm_per_step / ascent_s_per_step)
* everything will be ok. */
put_string(b, translate("gettextFromC", "In deco (calc)\n"));
} else if (prefs.calcndltts && entry->ndl_calc != 0) {
if(entry->ndl_calc < MAX_PROFILE_DECO)
put_format_loc(b, translate("gettextFromC", "NDL: %umin (calc)\n"), DIV_UP(entry->ndl_calc, 60));
else
put_string(b, translate("gettextFromC", "NDL: >2h (calc)\n"));
}
if (entry->tts_calc) {
if (entry->tts_calc < MAX_PROFILE_DECO)
put_format_loc(b, translate("gettextFromC", "TTS: %umin (calc)\n"), DIV_UP(entry->tts_calc, 60));
else
put_string(b, translate("gettextFromC", "TTS: >2h (calc)\n"));
}
if (entry->rbt)
put_format_loc(b, translate("gettextFromC", "RBT: %umin\n"), DIV_UP(entry->rbt, 60));
if (prefs.decoinfo) {
if (entry->current_gf > 0.0)
put_format(b, translate("gettextFromC", "GF %d%%\n"), (int)(100.0 * entry->current_gf));
if (entry->surface_gf > 0.0)
put_format(b, translate("gettextFromC", "Surface GF %.0f%%\n"), entry->surface_gf);
if (entry->ceiling) {
depthvalue = get_depth_units(entry->ceiling, NULL, &depth_unit);
put_format_loc(b, translate("gettextFromC", "Calculated ceiling %.0f%s\n"), depthvalue, depth_unit);
if (prefs.calcalltissues) {
int k;
for (k = 0; k < 16; k++) {
if (entry->ceilings[k]) {
depthvalue = get_depth_units(entry->ceilings[k], NULL, &depth_unit);
put_format_loc(b, translate("gettextFromC", "Tissue %.0fmin: %.1f%s\n"), buehlmann_N2_t_halflife[k], depthvalue, depth_unit);
}
}
}
}
}
if (entry->icd_warning)
put_format(b, "%s", translate("gettextFromC", "ICD in leading tissue\n"));
if (entry->heartbeat && prefs.hrgraph)
put_format_loc(b, translate("gettextFromC", "heart rate: %d\n"), entry->heartbeat);
if (entry->bearing >= 0)
put_format_loc(b, translate("gettextFromC", "bearing: %d\n"), entry->bearing);
if (entry->running_sum) {
depthvalue = get_depth_units(entry->running_sum / entry->sec, NULL, &depth_unit);
put_format_loc(b, translate("gettextFromC", "mean depth to here %.1f%s\n"), depthvalue, depth_unit);
}
strip_mb(b);
}
int get_plot_details_new(const struct plot_info *pi, int time, struct membuffer *mb)
{
int i;
/* The two first and the two last plot entries do not have useful data */
if (pi->nr <= 4)
return 0;
for (i = 2; i < pi->nr - 2; i++) {
if (pi->entry[i].sec >= time)
break;
}
plot_string(pi, i, mb);
return i;
}
/* Compare two plot_data entries and writes the results into a string */
void compare_samples(struct plot_info *pi, int idx1, int idx2, char *buf, int bufsize, bool sum)
{
struct plot_data *start, *stop, *data;
const char *depth_unit, *pressure_unit, *vertical_speed_unit;
char *buf2 = malloc(bufsize);
int avg_speed, max_asc_speed, max_desc_speed;
int delta_depth, avg_depth, max_depth, min_depth;
int bar_used, last_pressure, next_pressure, pressurevalue;
int last_sec, delta_time;
bool crossed_tankchange = false;
double depthvalue, speedvalue;
if (bufsize > 0)
buf[0] = '\0';
if (idx1 < 0 || idx2 < 0) {
free(buf2);
return;
}
if (pi->entry[idx1].sec > pi->entry[idx2].sec) {
int tmp = idx2;
idx2 = idx1;
idx1 = tmp;
} else if (pi->entry[idx1].sec == pi->entry[idx2].sec) {
free(buf2);
return;
}
start = pi->entry + idx1;
stop = pi->entry + idx2;
avg_speed = 0;
max_asc_speed = 0;
max_desc_speed = 0;
delta_depth = abs(start->depth - stop->depth);
delta_time = abs(start->sec - stop->sec);
avg_depth = 0;
max_depth = 0;
min_depth = INT_MAX;
bar_used = 0;
last_sec = start->sec;
last_pressure = get_plot_pressure(pi, idx1, 0);
data = start;
for (int i = idx1; i < idx2; ++i) {
data = pi->entry + i;
if (sum)
avg_speed += abs(data->speed) * (data->sec - last_sec);
else
avg_speed += data->speed * (data->sec - last_sec);
avg_depth += data->depth * (data->sec - last_sec);
if (data->speed > max_desc_speed)
max_desc_speed = data->speed;
if (data->speed < max_asc_speed)
max_asc_speed = data->speed;
if (data->depth < min_depth)
min_depth = data->depth;
if (data->depth > max_depth)
max_depth = data->depth;
/* Try to detect gas changes - this hack might work for some side mount scenarios? */
next_pressure = get_plot_pressure(pi, i, 0);
if (next_pressure < last_pressure + 2000)
bar_used += last_pressure - next_pressure;
last_sec = data->sec;
last_pressure = next_pressure;
}
avg_depth /= stop->sec - start->sec;
avg_speed /= stop->sec - start->sec;
snprintf_loc(buf, bufsize, translate("gettextFromC", "ΔT:%d:%02dmin"), delta_time / 60, delta_time % 60);
memcpy(buf2, buf, bufsize);
depthvalue = get_depth_units(delta_depth, NULL, &depth_unit);
snprintf_loc(buf, bufsize, translate("gettextFromC", "%s ΔD:%.1f%s"), buf2, depthvalue, depth_unit);
memcpy(buf2, buf, bufsize);
depthvalue = get_depth_units(min_depth, NULL, &depth_unit);
snprintf_loc(buf, bufsize, translate("gettextFromC", "%s ↓D:%.1f%s"), buf2, depthvalue, depth_unit);
memcpy(buf2, buf, bufsize);
depthvalue = get_depth_units(max_depth, NULL, &depth_unit);
snprintf_loc(buf, bufsize, translate("gettextFromC", "%s ↑D:%.1f%s"), buf2, depthvalue, depth_unit);
memcpy(buf2, buf, bufsize);
depthvalue = get_depth_units(avg_depth, NULL, &depth_unit);
snprintf_loc(buf, bufsize, translate("gettextFromC", "%s øD:%.1f%s\n"), buf2, depthvalue, depth_unit);
memcpy(buf2, buf, bufsize);
speedvalue = get_vertical_speed_units(abs(max_desc_speed), NULL, &vertical_speed_unit);
snprintf_loc(buf, bufsize, translate("gettextFromC", "%s ↓V:%.2f%s"), buf2, speedvalue, vertical_speed_unit);
memcpy(buf2, buf, bufsize);
speedvalue = get_vertical_speed_units(abs(max_asc_speed), NULL, &vertical_speed_unit);
snprintf_loc(buf, bufsize, translate("gettextFromC", "%s ↑V:%.2f%s"), buf2, speedvalue, vertical_speed_unit);
memcpy(buf2, buf, bufsize);
speedvalue = get_vertical_speed_units(abs(avg_speed), NULL, &vertical_speed_unit);
snprintf_loc(buf, bufsize, translate("gettextFromC", "%s øV:%.2f%s"), buf2, speedvalue, vertical_speed_unit);
memcpy(buf2, buf, bufsize);
/* Only print if gas has been used */
if (bar_used) {
pressurevalue = get_pressure_units(bar_used, &pressure_unit);
memcpy(buf2, buf, bufsize);
snprintf_loc(buf, bufsize, translate("gettextFromC", "%s ΔP:%d%s"), buf2, pressurevalue, pressure_unit);
cylinder_t *cyl = get_cylinder(&displayed_dive, 0);
/* if we didn't cross a tank change and know the cylidner size as well, show SAC rate */
if (!crossed_tankchange && cyl->type.size.mliter) {
double volume_value;
int volume_precision;
const char *volume_unit;
int first = idx1;
int last = idx2;
while (first < last && get_plot_pressure(pi, first, 0) == 0)
first++;
while (last > first && get_plot_pressure(pi, last, 0) == 0)
last--;
pressure_t first_pressure = { get_plot_pressure(pi, first, 0) };
pressure_t stop_pressure = { get_plot_pressure(pi, last, 0) };
int volume_used = gas_volume(cyl, first_pressure) - gas_volume(cyl, stop_pressure);
/* Mean pressure in ATM */
double atm = depth_to_atm(avg_depth, &displayed_dive);
/* milliliters per minute */
int sac = lrint(volume_used / atm * 60 / delta_time);
memcpy(buf2, buf, bufsize);
volume_value = get_volume_units(sac, &volume_precision, &volume_unit);
snprintf_loc(buf, bufsize, translate("gettextFromC", "%s SAC:%.*f%s/min"), buf2, volume_precision, volume_value, volume_unit);
}
}
free(buf2);
}