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-rw-r--r--liquivision.c352
1 files changed, 352 insertions, 0 deletions
diff --git a/liquivision.c b/liquivision.c
new file mode 100644
index 000000000..bb71bfdee
--- /dev/null
+++ b/liquivision.c
@@ -0,0 +1,352 @@
+#include <string.h>
+
+#include "dive.h"
+#include "divelist.h"
+#include "file.h"
+
+
+// Convert bytes into an INT
+#define array_uint16_le(p) ((unsigned int) (p)[0] \
+ + ((p)[1]<<8) )
+#define array_uint32_le(p) ((unsigned int) (p)[0] \
+ + ((p)[1]<<8) + ((p)[2]<<16) \
+ + ((p)[3]<<24))
+
+
+static void
+parse_dives (int log_version, const unsigned char *buf, unsigned int buf_size) {
+ unsigned int ptr = 0;
+ unsigned char model;
+
+ struct dive *dive;
+ struct divecomputer *dc;
+ struct sample *sample;
+
+ while (ptr < buf_size) {
+ dive = alloc_dive();
+ dc = &dive->dc;
+
+ // Model 0=Xen, 1,2=Xeo, 4=Lynx, other=Liquivision
+ model = *(buf + ptr);
+ switch (model) {
+ case 0:
+ dc->model = "Xen";
+ break;
+ case 1:
+ case 2:
+ dc->model = "Xeo";
+ break;
+ case 4:
+ dc->model = "Lynx";
+ break;
+ default:
+ dc->model = "LiquiVision";
+ break;
+ }
+ ptr++;
+
+ // Dive location, assemble Location and Place
+ unsigned int len, place_len;
+ len = array_uint32_le(buf + ptr);
+ ptr += 4;
+ place_len = array_uint32_le(buf + ptr + len);
+
+ if (len && place_len) {
+ dive->location = malloc(len + place_len + 4);
+ memset(dive->location, 0, len + place_len + 4);
+ memcpy(dive->location, buf + ptr, len);
+ memcpy(dive->location + len, ", ", 2);
+ memcpy(dive->location + len + 2, buf + ptr + len + 4, place_len);
+ } else if (len) {
+ dive->location = strndup(buf + ptr, len);
+ } else if (place_len) {
+ dive->location = strndup(buf + ptr + len + 4, place_len);
+ }
+
+ ptr += len + 4 + place_len;
+
+ // Dive comment
+ len = array_uint32_le(buf + ptr);
+ ptr += 4;
+
+ // Blank notes are better than the default text
+ if (len && strncmp(buf + ptr, "Comment ...", 11)) {
+ dive->notes = strndup(buf + ptr, len);
+ }
+ ptr += len;
+
+ dive->id = array_uint32_le(buf + ptr);
+ ptr += 4;
+
+ dive->number = array_uint16_le(buf + ptr) + 1;
+ ptr += 2;
+
+ dive->duration.seconds = array_uint32_le(buf + ptr); // seconds
+ ptr += 4;
+
+ dive->maxdepth.mm = array_uint16_le(buf + ptr) * 10; // cm->mm
+ ptr += 2;
+
+ dive->meandepth.mm = array_uint16_le(buf + ptr) * 10; // cm->mm
+ ptr += 2;
+
+ dive->when = array_uint32_le(buf + ptr);
+ ptr += 4;
+
+ //unsigned int end_time = array_uint32_le(buf + ptr);
+ ptr += 4;
+
+ //unsigned int sit = array_uint32_le(buf + ptr);
+ ptr += 4;
+ //if (sit == 0xffffffff) {
+ //}
+
+ dive->surface_pressure.mbar = array_uint16_le(buf + ptr); // ???
+ ptr += 2;
+
+ //unsigned int rep_dive = array_uint16_le(buf + ptr);
+ ptr += 2;
+
+ dive->mintemp.mkelvin = C_to_mkelvin((float)array_uint16_le(buf + ptr)/10);// C->mK
+ ptr += 2;
+
+ dive->maxtemp.mkelvin = C_to_mkelvin((float)array_uint16_le(buf + ptr)/10);// C->mK
+ ptr += 2;
+
+ dive->salinity = *(buf + ptr); // ???
+ ptr += 1;
+
+ unsigned int sample_count = array_uint32_le(buf + ptr);
+ ptr += 4;
+
+ // Sample interval
+ unsigned char sample_interval;
+ sample_interval = 1;
+
+ unsigned char intervals[6] = {1,2,5,10,30,60};
+ if (*(buf + ptr) < 6)
+ sample_interval = intervals[*(buf + ptr)];
+ ptr += 1;
+
+ float start_cns = 0;
+ unsigned char dive_mode = 0, algorithm = 0;
+ if (array_uint32_le(buf + ptr) != sample_count) {
+ // Xeo, with CNS and OTU
+ start_cns = *(float *) (buf + ptr);
+ ptr += 4;
+ dive->cns = *(float *) (buf + ptr); // end cns
+ ptr += 4;
+ dive->otu = *(float *) (buf + ptr);
+ ptr += 4;
+ dive_mode = *(buf + ptr++); // 0=Deco, 1=Gauge, 2=None
+ algorithm = *(buf + ptr++); // 0=ZH-L16C+GF
+ sample_count = array_uint32_le(buf + ptr);
+ }
+ ptr += 4;
+
+ // Parse dive samples
+ const unsigned char *ds = buf + ptr;
+ const unsigned char *ts = buf + ptr + sample_count * 2 + 4;
+ const unsigned char *ps = buf + ptr + sample_count * 4 + 4;
+ unsigned int ps_count = array_uint32_le(ps);
+ ps += 4;
+
+ // Bump ptr
+ ptr += sample_count * 4 + 4;
+
+ // Handle events
+ unsigned int event;
+ unsigned int ps_ptr;
+ ps_ptr = 0;
+
+ unsigned int d = 0, e;
+ int event_time, mbar, sensor;
+
+ // Loop through events
+ for (e = 0; e < ps_count; e++) {
+ // Get event
+ event = array_uint16_le(ps + ps_ptr);
+ ps_ptr += 2;
+
+ switch (event) {
+ case 0x0002: // Unknown
+ case 0x0004: // Unknown
+ ps_ptr += 4;
+ continue;
+ case 0x0005: // Unknown
+ ps_ptr += 6;
+ continue;
+ case 0x0007: // Gas
+ // 4 byte time
+ // 1 byte O2, 1 bye He
+ ps_ptr += 6;
+ continue;
+ case 0x0008:
+ // 4 byte time
+ // 2 byte gas set point 2
+ ps_ptr += 6;
+ continue;
+ case 0x000f:
+ // Tank pressure
+ event_time = array_uint32_le(ps + ps_ptr);
+ sensor = 0; //array_uint16_le(ps + ps_ptr + 4);
+ mbar = array_uint16_le(ps + ps_ptr + 6) * 10; // cb->mb
+ // 1 byte PSR
+ // 1 byte ST
+ ps_ptr += 10;
+ break;
+ case 0x0010:
+ ps_ptr += 26;
+ continue;
+ case 0x0015: // Unknown
+ ps_ptr += 2;
+ continue;
+ default:
+ ps_ptr += 4;
+ continue;
+ }
+
+ int sample_time, next_time, last_time;
+ int depth_mm, last_depth, temp_mk, last_temp;
+
+ while (true) {
+ sample = prepare_sample(dc);
+
+ // Get sample times
+ sample_time = d * sample_interval;
+ depth_mm = array_uint16_le(ds + d * 2) * 10; // cm->mm
+ temp_mk = C_to_mkelvin(array_uint16_le(ts + d * 2) / 10); // dC->mK
+ next_time = (d < sample_count - 1 ? (d + 1) * sample_interval : sample_time);
+ last_time = (d ? (d - 1) * sample_interval : 0);
+
+ if (d == sample_count) {
+ // We still have events to record
+ sample->time.seconds = event_time;
+ sample->depth.mm == array_uint16_le(ds + (d - 1) * 2) * 10; // cm->mm
+ sample->temperature.mkelvin = C_to_mkelvin(array_uint16_le(ts + (d - 1) * 2) / 10); // dC->mK
+ sample->sensor = sensor;
+ sample->cylinderpressure.mbar = mbar;
+ finish_sample(dc);
+
+ break;
+ } else if (event_time > sample_time) {
+ // Record sample and loop
+ sample->time.seconds = sample_time;
+ sample->depth.mm = depth_mm;
+ sample->temperature.mkelvin = temp_mk;
+ finish_sample(dc);
+ d++;
+
+ continue;
+ } else if (event_time == sample_time) {
+ sample->time.seconds = sample_time;
+ sample->depth.mm = depth_mm;
+ sample->temperature.mkelvin = temp_mk;
+ sample->sensor = sensor;
+ sample->cylinderpressure.mbar = mbar;
+ finish_sample(dc);
+
+ break;
+ } else { // Event is prior to sample
+ sample->time.seconds = event_time;
+ sample->sensor = sensor;
+ sample->cylinderpressure.mbar = mbar;
+ if (last_time == sample_time) {
+ sample->depth.mm = depth_mm;
+ sample->temperature.mkelvin = temp_mk;
+ } else {
+ // Extrapolate
+ last_depth = array_uint16_le(ds + (d - 1) * 2) * 10; // cm->mm
+ last_temp = C_to_mkelvin(array_uint16_le(ts + (d - 1) * 2) / 10); // dC->mK
+ sample->depth.mm = last_depth + (depth_mm - last_depth)
+ * (event_time - last_time) / sample_interval;
+ sample->temperature.mkelvin = last_temp + (temp_mk - last_temp)
+ * (event_time - last_time) / sample_interval;
+ }
+ finish_sample(dc);
+
+ break;
+ }
+ } // while (true);
+ } // for each event sample
+
+ // record trailing depth samples
+ for ( ;d < sample_count; d++) {
+ sample = prepare_sample(dc);
+ sample->time.seconds = d * sample_interval;
+
+ sample->depth.mm = array_uint16_le(ds + d * 2) * 10; // cm->mm
+ sample->temperature.mkelvin =
+ C_to_mkelvin((float)array_uint16_le(ts + d * 2) / 10);
+ finish_sample(dc);
+ }
+
+ if (log_version == 3 && model == 4) {
+ // Advance to begin of next dive
+ switch (array_uint16_le(ps + ps_ptr)) {
+ case 0x0000:
+ ps_ptr += 5;
+ break;
+ case 0x0100:
+ ps_ptr += 7;
+ break;
+ case 0x0200:
+ ps_ptr += 9;
+ break;
+ case 0x0300:
+ ps_ptr += 11;
+ break;
+ case 0x0b0b:
+ ps_ptr += 27;
+ break;
+ }
+
+ while (*(ps + ps_ptr) != 0x04)
+ ps_ptr++;
+ }
+
+ // End dive
+ dive->downloaded = true;
+ record_dive(dive);
+ mark_divelist_changed(true);
+
+ // Advance ptr for next dive
+ ptr += ps_ptr + 4;
+ } // while
+
+ save_dives("/tmp/test.xml");
+}
+
+
+int
+try_to_open_liquivision(const char *filename, struct memblock *mem)
+{
+ void *name;
+ const unsigned char *buf = mem->buffer;
+ unsigned int buf_size = mem->size;
+ unsigned int ptr;
+ int log_version;
+
+ // Get name
+ unsigned int len = array_uint32_le(buf);
+ if (len) {
+ name = malloc(len);
+ strncpy(name, buf + 4, len);
+ }
+ ptr = 4 + len;
+
+ unsigned int dive_count = array_uint32_le(buf + ptr);
+ if (dive_count == 0xffffffff) {
+ // File version 3.0
+ log_version = 3;
+ ptr += 6;
+ dive_count = array_uint32_le(buf + ptr);
+ } else {
+ log_version = 2;
+ }
+ ptr += 4;
+
+ parse_dives(log_version, buf + ptr, buf_size - ptr);
+
+ return 1;
+}
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