385c1850cb
The dive mode is stored in each sample, and can change during the dive. In order to report a single value for the entire dive, we assume the value of the first sample is representive for the entire dive. For example a dive started as a CC dive but with a bailout to OC during the dive, is still considered to be a CC dive. A warning is generated if the dive mode changes.
355 lines
9.7 KiB
C
355 lines
9.7 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2014 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 <libdivecomputer/divesystem_idive.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), &divesystem_idive_parser_vtable)
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#define IX3M_EASY 0x22
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#define IX3M_DEEP 0x23
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#define IX3M_TEC 0x24
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#define IX3M_REB 0x25
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#define SZ_HEADER_IDIVE 0x32
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#define SZ_SAMPLE_IDIVE 0x2A
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#define SZ_HEADER_IX3M 0x36
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#define SZ_SAMPLE_IX3M 0x36
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#define NGASMIXES 8
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#define EPOCH 1199145600 /* 2008-01-01 00:00:00 */
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#define OC 0
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#define SCR 1
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#define CCR 2
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#define GAUGE 3
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#define FREEDIVE 4
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#define INVALID 0xFFFFFFFF
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typedef struct divesystem_idive_parser_t divesystem_idive_parser_t;
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struct divesystem_idive_parser_t {
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dc_parser_t base;
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unsigned int headersize;
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unsigned int samplesize;
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// Cached fields.
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unsigned int cached;
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unsigned int divemode;
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unsigned int divetime;
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unsigned int maxdepth;
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unsigned int ngasmixes;
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unsigned int oxygen[NGASMIXES];
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unsigned int helium[NGASMIXES];
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};
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static dc_status_t divesystem_idive_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
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static dc_status_t divesystem_idive_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime);
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static dc_status_t divesystem_idive_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 divesystem_idive_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata);
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static const dc_parser_vtable_t divesystem_idive_parser_vtable = {
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sizeof(divesystem_idive_parser_t),
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DC_FAMILY_DIVESYSTEM_IDIVE,
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divesystem_idive_parser_set_data, /* set_data */
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divesystem_idive_parser_get_datetime, /* datetime */
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divesystem_idive_parser_get_field, /* fields */
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divesystem_idive_parser_samples_foreach, /* samples_foreach */
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NULL /* destroy */
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};
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dc_status_t
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divesystem_idive_parser_create (dc_parser_t **out, dc_context_t *context)
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{
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return divesystem_idive_parser_create2 (out, context, 0);
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}
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dc_status_t
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divesystem_idive_parser_create2 (dc_parser_t **out, dc_context_t *context, unsigned int model)
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{
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divesystem_idive_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 = (divesystem_idive_parser_t *) dc_parser_allocate (context, &divesystem_idive_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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// Set the default values.
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if (model >= IX3M_EASY && model <= IX3M_REB) {
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parser->headersize = SZ_HEADER_IX3M;
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parser->samplesize = SZ_SAMPLE_IX3M;
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} else {
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parser->headersize = SZ_HEADER_IDIVE;
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parser->samplesize = SZ_SAMPLE_IDIVE;
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}
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parser->cached = 0;
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parser->divemode = INVALID;
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parser->divetime = 0;
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parser->maxdepth = 0;
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parser->ngasmixes = 0;
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for (unsigned int i = 0; i < NGASMIXES; ++i) {
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parser->oxygen[i] = 0;
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parser->helium[i] = 0;
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}
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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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divesystem_idive_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size)
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{
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divesystem_idive_parser_t *parser = (divesystem_idive_parser_t *) abstract;
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// Reset the cache.
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parser->cached = 0;
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parser->divemode = INVALID;
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parser->divetime = 0;
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parser->maxdepth = 0;
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parser->ngasmixes = 0;
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for (unsigned int i = 0; i < NGASMIXES; ++i) {
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parser->oxygen[i] = 0;
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parser->helium[i] = 0;
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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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divesystem_idive_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime)
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{
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divesystem_idive_parser_t *parser = (divesystem_idive_parser_t *) abstract;
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if (abstract->size < parser->headersize)
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return DC_STATUS_DATAFORMAT;
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dc_ticks_t ticks = array_uint32_le(abstract->data + 7) + EPOCH;
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if (!dc_datetime_localtime (datetime, ticks))
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return DC_STATUS_DATAFORMAT;
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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divesystem_idive_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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divesystem_idive_parser_t *parser = (divesystem_idive_parser_t *) abstract;
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const unsigned char *data = abstract->data;
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if (abstract->size < parser->headersize)
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return DC_STATUS_DATAFORMAT;
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if (!parser->cached) {
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dc_status_t rc = divesystem_idive_parser_samples_foreach (abstract, NULL, NULL);
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if (rc != DC_STATUS_SUCCESS)
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return rc;
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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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*((unsigned int *) value) = parser->divetime;
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break;
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case DC_FIELD_MAXDEPTH:
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*((double *) value) = parser->maxdepth / 10.0;
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break;
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case DC_FIELD_GASMIX_COUNT:
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*((unsigned int *) value) = parser->ngasmixes;
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break;
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case DC_FIELD_GASMIX:
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gasmix->helium = parser->helium[flags] / 100.0;
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gasmix->oxygen = parser->oxygen[flags] / 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_ATMOSPHERIC:
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*((double *) value) = array_uint16_le (data + 11) / 1000.0;
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break;
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case DC_FIELD_DIVEMODE:
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if (parser->divemode == 0xFFFFFFFF)
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return DC_STATUS_UNSUPPORTED;
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switch (parser->divemode) {
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case OC:
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*((dc_divemode_t *) value) = DC_DIVEMODE_OC;
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break;
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case SCR:
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case CCR:
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*((dc_divemode_t *) value) = DC_DIVEMODE_CC;
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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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ERROR (abstract->context, "Unknown dive mode %02x.", parser->divemode);
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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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divesystem_idive_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata)
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{
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divesystem_idive_parser_t *parser = (divesystem_idive_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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unsigned int time = 0;
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unsigned int maxdepth = 0;
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unsigned int ngasmixes = 0;
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unsigned int oxygen[NGASMIXES];
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unsigned int helium[NGASMIXES];
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unsigned int o2_previous = 0xFFFFFFFF;
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unsigned int he_previous = 0xFFFFFFFF;
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unsigned int mode_previous = INVALID;
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unsigned int divemode = INVALID;
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unsigned int offset = parser->headersize;
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while (offset + parser->samplesize <= size) {
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dc_sample_value_t sample = {0};
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// Time (seconds).
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unsigned int timestamp = array_uint32_le (data + offset + 2);
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if (timestamp <= time) {
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ERROR (abstract->context, "Timestamp moved backwards.");
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return DC_STATUS_DATAFORMAT;
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}
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time = timestamp;
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sample.time = timestamp;
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if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
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// Depth (1/10 m).
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unsigned int depth = array_uint16_le (data + offset + 6);
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if (maxdepth < depth)
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maxdepth = depth;
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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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// Temperature (Celsius).
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signed int temperature = (signed short) array_uint16_le (data + offset + 8);
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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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// Dive mode
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unsigned int mode = data[offset + 18];
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if (mode != mode_previous) {
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if (mode_previous != INVALID) {
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WARNING (abstract->context, "Dive mode changed from %02x to %02x.", mode_previous, mode);
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}
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mode_previous = mode;
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}
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if (divemode == INVALID) {
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divemode = mode;
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}
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// Gaschange.
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unsigned int o2 = data[offset + 10];
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unsigned int he = data[offset + 11];
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if (o2 != o2_previous || he != he_previous) {
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// Find the gasmix in the list.
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unsigned int i = 0;
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while (i < ngasmixes) {
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if (o2 == oxygen[i] && he == helium[i])
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break;
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i++;
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}
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// Add it to list if not found.
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if (i >= ngasmixes) {
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if (i >= NGASMIXES) {
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ERROR (abstract->context, "Maximum number of gas mixes reached.");
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return DC_STATUS_DATAFORMAT;
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}
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oxygen[i] = o2;
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helium[i] = he;
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ngasmixes = i + 1;
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}
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sample.gasmix = i;
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if (callback) callback (DC_SAMPLE_GASMIX, sample, userdata);
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o2_previous = o2;
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he_previous = he;
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}
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// Deco stop / NDL.
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unsigned int deco = array_uint16_le (data + offset + 21);
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unsigned int tts = array_uint16_le (data + offset + 23);
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if (tts != 0xFFFF) {
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if (deco) {
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sample.deco.type = DC_DECO_DECOSTOP;
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sample.deco.depth = deco / 10.0;
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} else {
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sample.deco.type = DC_DECO_NDL;
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sample.deco.depth = 0.0;
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}
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sample.deco.time = tts;
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if (callback) callback (DC_SAMPLE_DECO, sample, userdata);
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}
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// CNS
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unsigned int cns = array_uint16_le (data + offset + 29);
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sample.cns = cns / 100.0;
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if (callback) callback (DC_SAMPLE_CNS, sample, userdata);
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offset += parser->samplesize;
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}
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// Cache the data for later use.
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for (unsigned int i = 0; i < ngasmixes; ++i) {
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parser->helium[i] = helium[i];
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parser->oxygen[i] = oxygen[i];
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}
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parser->ngasmixes = ngasmixes;
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parser->maxdepth = maxdepth;
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parser->divetime = time;
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parser->divemode = divemode;
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parser->cached = 1;
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return DC_STATUS_SUCCESS;
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}
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