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-rw-r--r--core/uemis.c392
1 files changed, 392 insertions, 0 deletions
diff --git a/core/uemis.c b/core/uemis.c
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+++ b/core/uemis.c
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+/*
+ * uemis.c
+ *
+ * UEMIS SDA file importer
+ * AUTHOR: Dirk Hohndel - Copyright 2011
+ *
+ * Licensed under the MIT license.
+ */
+#include <stdio.h>
+#include <string.h>
+
+#include "gettext.h"
+
+#include "dive.h"
+#include "uemis.h"
+#include <libdivecomputer/parser.h>
+#include <libdivecomputer/version.h>
+
+/*
+ * following code is based on code found in at base64.sourceforge.net/b64.c
+ * AUTHOR: Bob Trower 08/04/01
+ * COPYRIGHT: Copyright (c) Trantor Standard Systems Inc., 2001
+ * NOTE: This source code may be used as you wish, subject to
+ * the MIT license.
+ */
+/*
+ * Translation Table to decode (created by Bob Trower)
+ */
+static const char cd64[] = "|$$$}rstuvwxyz{$$$$$$$>?@ABCDEFGHIJKLMNOPQRSTUVW$$$$$$XYZ[\\]^_`abcdefghijklmnopq";
+
+/*
+ * decodeblock -- decode 4 '6-bit' characters into 3 8-bit binary bytes
+ */
+static void decodeblock(unsigned char in[4], unsigned char out[3])
+{
+ out[0] = (unsigned char)(in[0] << 2 | in[1] >> 4);
+ out[1] = (unsigned char)(in[1] << 4 | in[2] >> 2);
+ out[2] = (unsigned char)(((in[2] << 6) & 0xc0) | in[3]);
+}
+
+/*
+ * decode a base64 encoded stream discarding padding, line breaks and noise
+ */
+static void decode(uint8_t *inbuf, uint8_t *outbuf, int inbuf_len)
+{
+ uint8_t in[4], out[3], v;
+ int i, len, indx_in = 0, indx_out = 0;
+
+ while (indx_in < inbuf_len) {
+ for (len = 0, i = 0; i < 4 && (indx_in < inbuf_len); i++) {
+ v = 0;
+ while ((indx_in < inbuf_len) && v == 0) {
+ v = inbuf[indx_in++];
+ v = ((v < 43 || v > 122) ? 0 : cd64[v - 43]);
+ if (v)
+ v = ((v == '$') ? 0 : v - 61);
+ }
+ if (indx_in < inbuf_len) {
+ len++;
+ if (v)
+ in[i] = (v - 1);
+ } else
+ in[i] = 0;
+ }
+ if (len) {
+ decodeblock(in, out);
+ for (i = 0; i < len - 1; i++)
+ outbuf[indx_out++] = out[i];
+ }
+ }
+}
+/* end code from Bob Trower */
+
+/*
+ * convert the base64 data blog
+ */
+static int uemis_convert_base64(char *base64, uint8_t **data)
+{
+ int len, datalen;
+
+ len = strlen(base64);
+ datalen = (len / 4 + 1) * 3;
+ if (datalen < 0x123 + 0x25)
+ /* less than header + 1 sample??? */
+ fprintf(stderr, "suspiciously short data block %d\n", datalen);
+
+ *data = malloc(datalen);
+ if (!*data) {
+ fprintf(stderr, "Out of memory\n");
+ return 0;
+ }
+ decode((unsigned char *)base64, *data, len);
+
+ if (memcmp(*data, "Dive\01\00\00", 7))
+ fprintf(stderr, "Missing Dive100 header\n");
+
+ return datalen;
+}
+
+struct uemis_helper {
+ uint32_t diveid;
+ int lbs;
+ int divespot;
+ int dive_site_uuid;
+ struct uemis_helper *next;
+};
+static struct uemis_helper *uemis_helper = NULL;
+
+static struct uemis_helper *uemis_get_helper(uint32_t diveid)
+{
+ struct uemis_helper **php = &uemis_helper;
+ struct uemis_helper *hp = *php;
+
+ while (hp) {
+ if (hp->diveid == diveid)
+ return hp;
+ if (hp->next) {
+ hp = hp->next;
+ continue;
+ }
+ php = &hp->next;
+ break;
+ }
+ hp = *php = calloc(1, sizeof(struct uemis_helper));
+ hp->diveid = diveid;
+ hp->next = NULL;
+ return hp;
+}
+
+static void uemis_weight_unit(int diveid, int lbs)
+{
+ struct uemis_helper *hp = uemis_get_helper(diveid);
+ if (hp)
+ hp->lbs = lbs;
+}
+
+int uemis_get_weight_unit(uint32_t diveid)
+{
+ struct uemis_helper *hp = uemis_helper;
+ while (hp) {
+ if (hp->diveid == diveid)
+ return hp->lbs;
+ hp = hp->next;
+ }
+ /* odd - we should have found this; default to kg */
+ return 0;
+}
+
+void uemis_mark_divelocation(int diveid, int divespot, uint32_t dive_site_uuid)
+{
+ struct uemis_helper *hp = uemis_get_helper(diveid);
+ hp->divespot = divespot;
+ hp->dive_site_uuid = dive_site_uuid;
+}
+
+/* support finding a dive spot based on the diveid */
+int uemis_get_divespot_id_by_diveid(uint32_t diveid)
+{
+ struct uemis_helper *hp = uemis_helper;
+ while (hp) {
+ if (hp->diveid == diveid)
+ return hp->divespot;
+ hp = hp->next;
+ }
+ return -1;
+}
+
+void uemis_set_divelocation(int divespot, char *text, double longitude, double latitude)
+{
+ struct uemis_helper *hp = uemis_helper;
+ while (hp) {
+ if (hp->divespot == divespot) {
+ struct dive_site *ds = get_dive_site_by_uuid(hp->dive_site_uuid);
+ if (ds) {
+ ds->name = strdup(text);
+ ds->longitude.udeg = round(longitude * 1000000);
+ ds->latitude.udeg = round(latitude * 1000000);
+ }
+ }
+ hp = hp->next;
+ }
+}
+
+/* Create events from the flag bits and other data in the sample;
+ * These bits basically represent what is displayed on screen at sample time.
+ * Many of these 'warnings' are way hyper-active and seriously clutter the
+ * profile plot - so these are disabled by default
+ *
+ * we mark all the strings for translation, but we store the untranslated
+ * strings and only convert them when displaying them on screen - this way
+ * when we write them to the XML file we'll always have the English strings,
+ * regardless of locale
+ */
+static void uemis_event(struct dive *dive, struct divecomputer *dc, struct sample *sample, uemis_sample_t *u_sample)
+{
+ uint8_t *flags = u_sample->flags;
+ int stopdepth;
+ static int lastndl;
+
+ if (flags[1] & 0x01)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Safety stop violation"));
+ if (flags[1] & 0x08)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Speed alarm"));
+#if WANT_CRAZY_WARNINGS
+ if (flags[1] & 0x06) /* both bits 1 and 2 are a warning */
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Speed warning"));
+ if (flags[1] & 0x10)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "pO₂ green warning"));
+#endif
+ if (flags[1] & 0x20)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "pO₂ ascend warning"));
+ if (flags[1] & 0x40)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "pO₂ ascend alarm"));
+ /* flags[2] reflects the deco / time bar
+ * flags[3] reflects more display details on deco and pO2 */
+ if (flags[4] & 0x01)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Tank pressure info"));
+ if (flags[4] & 0x04)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "RGT warning"));
+ if (flags[4] & 0x08)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "RGT alert"));
+ if (flags[4] & 0x40)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Tank change suggested"));
+ if (flags[4] & 0x80)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Depth limit exceeded"));
+ if (flags[5] & 0x01)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Max deco time warning"));
+ if (flags[5] & 0x04)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Dive time info"));
+ if (flags[5] & 0x08)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Dive time alert"));
+ if (flags[5] & 0x10)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Marker"));
+ if (flags[6] & 0x02)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "No tank data"));
+ if (flags[6] & 0x04)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Low battery warning"));
+ if (flags[6] & 0x08)
+ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Low battery alert"));
+/* flags[7] reflects the little on screen icons that remind of previous
+ * warnings / alerts - not useful for events */
+
+#if UEMIS_DEBUG & 32
+ int i, j;
+ for (i = 0; i < 8; i++) {
+ printf(" %d: ", 29 + i);
+ for (j = 7; j >= 0; j--)
+ printf("%c", flags[i] & 1 << j ? '1' : '0');
+ }
+ printf("\n");
+#endif
+ /* now add deco / NDL
+ * we don't use events but store this in the sample - that makes much more sense
+ * for the way we display this information
+ * What we know about the encoding so far:
+ * flags[3].bit0 | flags[5].bit1 != 0 ==> in deco
+ * flags[0].bit7 == 1 ==> Safety Stop
+ * otherwise NDL */
+ stopdepth = rel_mbar_to_depth(u_sample->hold_depth, dive);
+ if ((flags[3] & 1) | (flags[5] & 2)) {
+ /* deco */
+ sample->in_deco = true;
+ sample->stopdepth.mm = stopdepth;
+ sample->stoptime.seconds = u_sample->hold_time * 60;
+ sample->ndl.seconds = 0;
+ } else if (flags[0] & 128) {
+ /* safety stop - distinguished from deco stop by having
+ * both ndl and stop information */
+ sample->in_deco = false;
+ sample->stopdepth.mm = stopdepth;
+ sample->stoptime.seconds = u_sample->hold_time * 60;
+ sample->ndl.seconds = lastndl;
+ } else {
+ /* NDL */
+ sample->in_deco = false;
+ lastndl = sample->ndl.seconds = u_sample->hold_time * 60;
+ sample->stopdepth.mm = 0;
+ sample->stoptime.seconds = 0;
+ }
+#if UEMIS_DEBUG & 32
+ printf("%dm:%ds: p_amb_tol:%d surface:%d holdtime:%d holddepth:%d/%d ---> stopdepth:%d stoptime:%d ndl:%d\n",
+ sample->time.seconds / 60, sample->time.seconds % 60, u_sample->p_amb_tol, dive->dc.surface_pressure.mbar,
+ u_sample->hold_time, u_sample->hold_depth, stopdepth, sample->stopdepth.mm, sample->stoptime.seconds, sample->ndl.seconds);
+#endif
+}
+
+/*
+ * parse uemis base64 data blob into struct dive
+ */
+void uemis_parse_divelog_binary(char *base64, void *datap)
+{
+ int datalen;
+ int i;
+ uint8_t *data;
+ struct sample *sample = NULL;
+ uemis_sample_t *u_sample;
+ struct dive *dive = datap;
+ struct divecomputer *dc = &dive->dc;
+ int template, gasoffset;
+ uint8_t active = 0;
+ char version[5];
+
+ datalen = uemis_convert_base64(base64, &data);
+ dive->dc.airtemp.mkelvin = C_to_mkelvin((*(uint16_t *)(data + 45)) / 10.0);
+ dive->dc.surface_pressure.mbar = *(uint16_t *)(data + 43);
+ if (*(uint8_t *)(data + 19))
+ dive->dc.salinity = SEAWATER_SALINITY; /* avg grams per 10l sea water */
+ else
+ dive->dc.salinity = FRESHWATER_SALINITY; /* grams per 10l fresh water */
+
+ /* this will allow us to find the last dive read so far from this computer */
+ dc->model = strdup("Uemis Zurich");
+ dc->deviceid = *(uint32_t *)(data + 9);
+ dc->diveid = *(uint16_t *)(data + 7);
+ /* remember the weight units used in this dive - we may need this later when
+ * parsing the weight */
+ uemis_weight_unit(dc->diveid, *(uint8_t *)(data + 24));
+ /* dive template in use:
+ 0 = air
+ 1 = nitrox (B)
+ 2 = nitrox (B+D)
+ 3 = nitrox (B+T+D)
+ uemis cylinder data is insane - it stores seven tank settings in a block
+ and the template tells us which of the four groups of tanks we need to look at
+ */
+ gasoffset = template = *(uint8_t *)(data + 115);
+ if (template == 3)
+ gasoffset = 4;
+ if (template == 0)
+ template = 1;
+ for (i = 0; i < template; i++) {
+ float volume = *(float *)(data + 116 + 25 * (gasoffset + i)) * 1000.0;
+ /* uemis always assumes a working pressure of 202.6bar (!?!?) - I first thought
+ * it was 3000psi, but testing against all my dives gets me that strange number.
+ * Still, that's of course completely bogus and shows they don't get how
+ * cylinders are named in non-metric parts of the world...
+ * we store the incorrect working pressure to get the SAC calculations "close"
+ * but the user will have to correct this manually
+ */
+ dive->cylinder[i].type.size.mliter = rint(volume);
+ dive->cylinder[i].type.workingpressure.mbar = 202600;
+ dive->cylinder[i].gasmix.o2.permille = *(uint8_t *)(data + 120 + 25 * (gasoffset + i)) * 10;
+ dive->cylinder[i].gasmix.he.permille = 0;
+ }
+ /* first byte of divelog data is at offset 0x123 */
+ i = 0x123;
+ u_sample = (uemis_sample_t *)(data + i);
+ while ((i <= datalen) && (data[i] != 0 || data[i + 1] != 0)) {
+ if (u_sample->active_tank != active) {
+ if (u_sample->active_tank >= MAX_CYLINDERS) {
+ fprintf(stderr, "got invalid sensor #%d was #%d\n", u_sample->active_tank, active);
+ } else {
+ active = u_sample->active_tank;
+ add_gas_switch_event(dive, dc, u_sample->dive_time, active);
+ }
+ }
+ sample = prepare_sample(dc);
+ sample->time.seconds = u_sample->dive_time;
+ sample->depth.mm = rel_mbar_to_depth(u_sample->water_pressure, dive);
+ sample->temperature.mkelvin = C_to_mkelvin(u_sample->dive_temperature / 10.0);
+ sample->sensor = active;
+ sample->cylinderpressure.mbar =
+ (u_sample->tank_pressure_high * 256 + u_sample->tank_pressure_low) * 10;
+ sample->cns = u_sample->cns;
+ uemis_event(dive, dc, sample, u_sample);
+ finish_sample(dc);
+ i += 0x25;
+ u_sample++;
+ }
+ if (sample)
+ dive->dc.duration.seconds = sample->time.seconds - 1;
+
+ /* get data from the footer */
+ char buffer[24];
+
+ snprintf(version, sizeof(version), "%1u.%02u", data[18], data[17]);
+ add_extra_data(dc, "FW Version", version);
+ snprintf(buffer, sizeof(buffer), "%08x", *(uint32_t *)(data + 9));
+ add_extra_data(dc, "Serial", buffer);
+ snprintf(buffer, sizeof(buffer), "%d", *(uint16_t *)(data + i + 35));
+ add_extra_data(dc, "main battery after dive", buffer);
+ snprintf(buffer, sizeof(buffer), "%0u:%02u", FRACTION(*(uint16_t *)(data + i + 24), 60));
+ add_extra_data(dc, "no fly time", buffer);
+ snprintf(buffer, sizeof(buffer), "%0u:%02u", FRACTION(*(uint16_t *)(data + i + 26), 60));
+ add_extra_data(dc, "no dive time", buffer);
+ snprintf(buffer, sizeof(buffer), "%0u:%02u", FRACTION(*(uint16_t *)(data + i + 28), 60));
+ add_extra_data(dc, "desat time", buffer);
+ snprintf(buffer, sizeof(buffer), "%u", *(uint16_t *)(data + i + 30));
+ add_extra_data(dc, "allowed altitude", buffer);
+
+ return;
+}
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