8fa63eb4a2
When the atmospheric pressure is set to zero (the default value), the atmosperic pressure stored in the header is used.
257 lines
7.1 KiB
C
257 lines
7.1 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2011 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 "atomics_cobalt.h"
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#include "parser-private.h"
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#include "utils.h"
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#include "array.h"
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#include "units.h"
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#define SZ_HEADER 228
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#define SZ_GASMIX 18
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#define SZ_GASSWITCH 6
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#define SZ_SEGMENT 16
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typedef struct atomics_cobalt_parser_t atomics_cobalt_parser_t;
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struct atomics_cobalt_parser_t {
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parser_t base;
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// Depth calibration.
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double atmospheric;
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double hydrostatic;
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};
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static parser_status_t atomics_cobalt_parser_set_data (parser_t *abstract, const unsigned char *data, unsigned int size);
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static parser_status_t atomics_cobalt_parser_get_datetime (parser_t *abstract, dc_datetime_t *datetime);
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static parser_status_t atomics_cobalt_parser_get_field (parser_t *abstract, parser_field_type_t type, unsigned int flags, void *value);
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static parser_status_t atomics_cobalt_parser_samples_foreach (parser_t *abstract, sample_callback_t callback, void *userdata);
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static parser_status_t atomics_cobalt_parser_destroy (parser_t *abstract);
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static const parser_backend_t atomics_cobalt_parser_backend = {
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PARSER_TYPE_ATOMICS_COBALT,
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atomics_cobalt_parser_set_data, /* set_data */
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atomics_cobalt_parser_get_datetime, /* datetime */
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atomics_cobalt_parser_get_field, /* fields */
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atomics_cobalt_parser_samples_foreach, /* samples_foreach */
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atomics_cobalt_parser_destroy /* destroy */
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};
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static int
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parser_is_atomics_cobalt (parser_t *abstract)
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{
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if (abstract == NULL)
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return 0;
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return abstract->backend == &atomics_cobalt_parser_backend;
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}
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parser_status_t
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atomics_cobalt_parser_create (parser_t **out)
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{
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if (out == NULL)
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return PARSER_STATUS_ERROR;
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// Allocate memory.
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atomics_cobalt_parser_t *parser = (atomics_cobalt_parser_t *) malloc (sizeof (atomics_cobalt_parser_t));
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if (parser == NULL) {
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WARNING ("Failed to allocate memory.");
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return PARSER_STATUS_MEMORY;
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}
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// Initialize the base class.
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parser_init (&parser->base, &atomics_cobalt_parser_backend);
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// Set the default values.
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parser->atmospheric = 0.0;
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parser->hydrostatic = 1025.0 * GRAVITY;
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*out = (parser_t*) parser;
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return PARSER_STATUS_SUCCESS;
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}
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static parser_status_t
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atomics_cobalt_parser_destroy (parser_t *abstract)
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{
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if (! parser_is_atomics_cobalt (abstract))
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return PARSER_STATUS_TYPE_MISMATCH;
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// Free memory.
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free (abstract);
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return PARSER_STATUS_SUCCESS;
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}
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static parser_status_t
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atomics_cobalt_parser_set_data (parser_t *abstract, const unsigned char *data, unsigned int size)
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{
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if (! parser_is_atomics_cobalt (abstract))
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return PARSER_STATUS_TYPE_MISMATCH;
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return PARSER_STATUS_SUCCESS;
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}
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parser_status_t
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atomics_cobalt_parser_set_calibration (parser_t *abstract, double atmospheric, double hydrostatic)
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{
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atomics_cobalt_parser_t *parser = (atomics_cobalt_parser_t*) abstract;
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if (! parser_is_atomics_cobalt (abstract))
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return PARSER_STATUS_TYPE_MISMATCH;
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parser->atmospheric = atmospheric;
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parser->hydrostatic = hydrostatic;
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return PARSER_STATUS_SUCCESS;
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}
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static parser_status_t
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atomics_cobalt_parser_get_datetime (parser_t *abstract, dc_datetime_t *datetime)
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{
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if (abstract->size < SZ_HEADER)
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return PARSER_STATUS_ERROR;
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const unsigned char *p = abstract->data;
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if (datetime) {
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datetime->year = array_uint16_le (p + 0x14);
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datetime->month = p[0x16];
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datetime->day = p[0x17];
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datetime->hour = p[0x18];
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datetime->minute = p[0x19];
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datetime->second = 0;
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}
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return PARSER_STATUS_SUCCESS;
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}
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static parser_status_t
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atomics_cobalt_parser_get_field (parser_t *abstract, parser_field_type_t type, unsigned int flags, void *value)
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{
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atomics_cobalt_parser_t *parser = (atomics_cobalt_parser_t *) abstract;
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if (abstract->size < SZ_HEADER)
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return PARSER_STATUS_ERROR;
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const unsigned char *p = abstract->data;
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gasmix_t *gasmix = (gasmix_t *) value;
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double atmospheric = 0.0;
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if (parser->atmospheric)
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atmospheric = parser->atmospheric;
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else
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atmospheric = array_uint16_le (p + 0x26) * BAR / 1000.0;
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if (value) {
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switch (type) {
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case FIELD_TYPE_DIVETIME:
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*((unsigned int *) value) = array_uint16_le (p + 0x58) * 60;
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break;
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case FIELD_TYPE_MAXDEPTH:
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*((double *) value) = (array_uint16_le (p + 0x56) * BAR / 1000.0 - atmospheric) / parser->hydrostatic;
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break;
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case FIELD_TYPE_GASMIX_COUNT:
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*((unsigned int *) value) = p[0x2a];
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break;
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case FIELD_TYPE_GASMIX:
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gasmix->helium = p[SZ_HEADER + SZ_GASMIX * flags + 5] / 100.0;
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gasmix->oxygen = p[SZ_HEADER + SZ_GASMIX * flags + 4] / 100.0;
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gasmix->nitrogen = 1.0 - gasmix->oxygen - gasmix->helium;
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break;
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default:
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return PARSER_STATUS_UNSUPPORTED;
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}
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}
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return PARSER_STATUS_SUCCESS;
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}
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static parser_status_t
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atomics_cobalt_parser_samples_foreach (parser_t *abstract, sample_callback_t callback, void *userdata)
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{
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atomics_cobalt_parser_t *parser = (atomics_cobalt_parser_t *) abstract;
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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 PARSER_STATUS_ERROR;
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unsigned int interval = data[0x1a];
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unsigned int ngasmixes = data[0x2a];
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unsigned int nswitches = data[0x2b];
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unsigned int nsegments = array_uint16_le (data + 0x50);
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unsigned int header = SZ_HEADER + SZ_GASMIX * ngasmixes +
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SZ_GASSWITCH * nswitches;
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if (size < header + SZ_SEGMENT * nsegments)
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return PARSER_STATUS_ERROR;
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double atmospheric = 0.0;
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if (parser->atmospheric)
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atmospheric = parser->atmospheric;
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else
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atmospheric = array_uint16_le (data + 0x26) * BAR / 1000.0;
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unsigned int time = 0;
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unsigned int offset = header;
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while (offset + SZ_SEGMENT <= size) {
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parser_sample_value_t sample = {0};
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// Time (seconds).
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time += interval;
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sample.time = time;
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if (callback) callback (SAMPLE_TYPE_TIME, sample, userdata);
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// Depth (1/1000 bar).
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unsigned int depth = array_uint16_le (data + offset + 0);
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sample.depth = (depth * BAR / 1000.0 - atmospheric) / parser->hydrostatic;
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if (callback) callback (SAMPLE_TYPE_DEPTH, sample, userdata);
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// Pressure (1 psi).
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unsigned int pressure = array_uint16_le (data + offset + 2);
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sample.pressure.tank = 0;
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sample.pressure.value = pressure * PSI / BAR;
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if (callback) callback (SAMPLE_TYPE_PRESSURE, sample, userdata);
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// Temperature (1 °F).
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unsigned int temperature = data[offset + 8];
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sample.temperature = (temperature - 32.0) * (5.0 / 9.0);
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if (callback) callback (SAMPLE_TYPE_TEMPERATURE, sample, userdata);
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offset += SZ_SEGMENT;
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}
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return PARSER_STATUS_SUCCESS;
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}
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