3eedf4d24d
The maximum depth value is stored in the dive header. There is no need to parse the profile data to obtain it. This also avoids returning a zero depth when the profile data is no longer available. A few other fields (e.g. average depth, atmospheric pressure and temperature) are also present in the dive header.
363 lines
9.2 KiB
C
363 lines
9.2 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2018 Jef Driesen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include "cressi_goa.h"
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#include "context-private.h"
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#include "parser-private.h"
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#include "array.h"
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#define ISINSTANCE(parser) dc_device_isinstance((parser), &cressi_goa_parser_vtable)
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#define SZ_HEADER 23
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#define DEPTH 0
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#define DEPTH2 1
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#define TIME 2
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#define TEMPERATURE 3
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#define SCUBA 0
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#define NITROX 1
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#define FREEDIVE 2
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#define GAUGE 3
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#define NGASMIXES 2
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#define UNDEFINED 0xFFFFFFFF
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typedef struct cressi_goa_parser_t cressi_goa_parser_t;
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struct cressi_goa_parser_t {
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dc_parser_t base;
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unsigned int model;
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};
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typedef struct cressi_goa_layout_t {
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unsigned int headersize;
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unsigned int datetime;
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unsigned int divetime;
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unsigned int gasmix;
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unsigned int atmospheric;
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unsigned int maxdepth;
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unsigned int avgdepth;
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unsigned int temperature;
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} cressi_goa_layout_t;
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static dc_status_t cressi_goa_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
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static dc_status_t cressi_goa_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime);
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static dc_status_t cressi_goa_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsigned int flags, void *value);
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static dc_status_t cressi_goa_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata);
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static const dc_parser_vtable_t cressi_goa_parser_vtable = {
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sizeof(cressi_goa_parser_t),
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DC_FAMILY_CRESSI_GOA,
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cressi_goa_parser_set_data, /* set_data */
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NULL, /* set_clock */
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NULL, /* set_atmospheric */
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NULL, /* set_density */
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cressi_goa_parser_get_datetime, /* datetime */
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cressi_goa_parser_get_field, /* fields */
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cressi_goa_parser_samples_foreach, /* samples_foreach */
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NULL /* destroy */
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};
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static const cressi_goa_layout_t layouts[] = {
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/* SCUBA */
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{
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0x61, /* headersize */
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0x11, /* datetime */
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0x19, /* divetime */
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0x1F, /* gasmix */
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0x23, /* atmospheric */
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0x4E, /* maxdepth */
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0x50, /* avgdepth */
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0x52, /* temperature */
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},
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/* NITROX */
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{
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0x61, /* headersize */
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0x11, /* datetime */
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0x19, /* divetime */
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0x1F, /* gasmix */
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0x23, /* atmospheric */
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0x4E, /* maxdepth */
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0x50, /* avgdepth */
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0x52, /* temperature */
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},
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/* FREEDIVE */
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{
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0x2B, /* headersize */
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0x11, /* datetime */
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0x19, /* divetime */
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UNDEFINED, /* gasmix */
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UNDEFINED, /* atmospheric */
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0x1C, /* maxdepth */
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UNDEFINED, /* avgdepth */
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0x1E, /* temperature */
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},
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/* GAUGE */
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{
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0x2D, /* headersize */
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0x11, /* datetime */
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0x19, /* divetime */
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UNDEFINED, /* gasmix */
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0x1B, /* atmospheric */
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0x1D, /* maxdepth */
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0x1F, /* avgdepth */
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0x21, /* temperature */
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},
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};
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dc_status_t
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cressi_goa_parser_create (dc_parser_t **out, dc_context_t *context, unsigned int model)
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{
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cressi_goa_parser_t *parser = NULL;
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if (out == NULL)
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return DC_STATUS_INVALIDARGS;
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// Allocate memory.
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parser = (cressi_goa_parser_t *) dc_parser_allocate (context, &cressi_goa_parser_vtable);
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if (parser == NULL) {
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ERROR (context, "Failed to allocate memory.");
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return DC_STATUS_NOMEMORY;
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}
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parser->model = model;
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*out = (dc_parser_t*) parser;
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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cressi_goa_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size)
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{
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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cressi_goa_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime)
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{
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const unsigned char *data = abstract->data;
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unsigned int size = abstract->size;
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if (size < SZ_HEADER)
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return DC_STATUS_DATAFORMAT;
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unsigned int divemode = data[2];
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if (divemode >= C_ARRAY_SIZE(layouts)) {
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return DC_STATUS_DATAFORMAT;
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}
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const cressi_goa_layout_t *layout = &layouts[divemode];
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if (size < layout->headersize)
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return DC_STATUS_DATAFORMAT;
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const unsigned char *p = abstract->data + layout->datetime;
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if (datetime) {
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datetime->year = array_uint16_le(p);
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datetime->month = p[2];
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datetime->day = p[3];
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datetime->hour = p[4];
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datetime->minute = p[5];
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datetime->second = 0;
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datetime->timezone = DC_TIMEZONE_NONE;
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}
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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cressi_goa_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsigned int flags, void *value)
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{
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const unsigned char *data = abstract->data;
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unsigned int size = abstract->size;
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if (size < SZ_HEADER)
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return DC_STATUS_DATAFORMAT;
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unsigned int divemode = data[2];
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if (divemode >= C_ARRAY_SIZE(layouts)) {
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return DC_STATUS_DATAFORMAT;
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}
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const cressi_goa_layout_t *layout = &layouts[divemode];
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if (size < layout->headersize)
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return DC_STATUS_DATAFORMAT;
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unsigned int ngasmixes = 0;
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if (layout->gasmix != UNDEFINED) {
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for (unsigned int i = 0; i < NGASMIXES; ++i) {
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if (data[layout->gasmix + 2 * i + 1] == 0)
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break;
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ngasmixes++;
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}
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}
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dc_gasmix_t *gasmix = (dc_gasmix_t *) value;
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if (value) {
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switch (type) {
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case DC_FIELD_DIVETIME:
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if (layout->divetime == UNDEFINED)
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return DC_STATUS_UNSUPPORTED;
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*((unsigned int *) value) = array_uint16_le (data + layout->divetime);
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break;
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case DC_FIELD_MAXDEPTH:
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if (layout->maxdepth == UNDEFINED)
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return DC_STATUS_UNSUPPORTED;
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*((double *) value) = array_uint16_le (data + layout->maxdepth) / 10.0;
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break;
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case DC_FIELD_AVGDEPTH:
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if (layout->avgdepth == UNDEFINED)
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return DC_STATUS_UNSUPPORTED;
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*((double *) value) = array_uint16_le (data + layout->avgdepth) / 10.0;
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break;
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case DC_FIELD_TEMPERATURE_MINIMUM:
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if (layout->temperature == UNDEFINED)
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return DC_STATUS_UNSUPPORTED;
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*((double *) value) = array_uint16_le (data + layout->temperature) / 10.0;
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break;
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case DC_FIELD_ATMOSPHERIC:
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if (layout->atmospheric == UNDEFINED)
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return DC_STATUS_UNSUPPORTED;
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*((double *) value) = array_uint16_le (data + layout->atmospheric) / 1000.0;
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break;
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case DC_FIELD_GASMIX_COUNT:
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*((unsigned int *) value) = ngasmixes;
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break;
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case DC_FIELD_GASMIX:
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gasmix->helium = 0.0;
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gasmix->oxygen = data[layout->gasmix + 2 * flags + 1] / 100.0;
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gasmix->nitrogen = 1.0 - gasmix->oxygen - gasmix->helium;
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break;
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case DC_FIELD_DIVEMODE:
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switch (divemode) {
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case SCUBA:
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case NITROX:
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*((dc_divemode_t *) value) = DC_DIVEMODE_OC;
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break;
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case GAUGE:
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*((dc_divemode_t *) value) = DC_DIVEMODE_GAUGE;
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break;
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case FREEDIVE:
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*((dc_divemode_t *) value) = DC_DIVEMODE_FREEDIVE;
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break;
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default:
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return DC_STATUS_DATAFORMAT;
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}
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break;
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default:
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return DC_STATUS_UNSUPPORTED;
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}
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}
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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cressi_goa_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata)
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{
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const unsigned char *data = abstract->data;
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unsigned int size = abstract->size;
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if (size < SZ_HEADER)
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return DC_STATUS_DATAFORMAT;
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unsigned int divemode = data[2];
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if (divemode >= C_ARRAY_SIZE(layouts)) {
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return DC_STATUS_DATAFORMAT;
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}
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const cressi_goa_layout_t *layout = &layouts[divemode];
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if (size < layout->headersize)
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return DC_STATUS_DATAFORMAT;
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unsigned int interval = divemode == FREEDIVE ? 2 : 5;
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unsigned int time = 0;
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unsigned int depth = 0;
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unsigned int gasmix = 0, gasmix_previous = 0xFFFFFFFF;
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unsigned int temperature = 0;
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unsigned int have_temperature = 0;
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unsigned int complete = 0;
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unsigned int offset = layout->headersize;
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while (offset + 2 <= size) {
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dc_sample_value_t sample = {0};
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// Get the sample type and value.
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unsigned int raw = array_uint16_le (data + offset);
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unsigned int type = (raw & 0x0003);
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unsigned int value = (raw & 0xFFFC) >> 2;
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if (type == DEPTH || type == DEPTH2) {
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depth = (value & 0x07FF);
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gasmix = (value & 0x0800) >> 11;
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time += interval;
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complete = 1;
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} else if (type == TEMPERATURE) {
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temperature = value;
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have_temperature = 1;
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} else if (type == TIME) {
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time += value;
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}
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if (complete) {
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// Time (seconds).
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sample.time = time;
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if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
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// Temperature (1/10 °C).
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if (have_temperature) {
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sample.temperature = temperature / 10.0;
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if (callback) callback (DC_SAMPLE_TEMPERATURE, sample, userdata);
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have_temperature = 0;
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}
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// Depth (1/10 m).
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sample.depth = depth / 10.0;
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if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
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// Gas change
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if (divemode == SCUBA || divemode == NITROX) {
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if (gasmix != gasmix_previous) {
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sample.gasmix = gasmix;
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if (callback) callback (DC_SAMPLE_GASMIX, sample, userdata);
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gasmix_previous = gasmix;
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}
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}
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complete = 0;
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}
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offset += 2;
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}
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return DC_STATUS_SUCCESS;
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}
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