264 lines
7.5 KiB
C
264 lines
7.5 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2008 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 <string.h> // memcmp
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#include <libdivecomputer/reefnet_sensusultra.h>
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#include <libdivecomputer/units.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_parser_isinstance((parser), &reefnet_sensusultra_parser_vtable)
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typedef struct reefnet_sensusultra_parser_t reefnet_sensusultra_parser_t;
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struct reefnet_sensusultra_parser_t {
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dc_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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// Clock synchronization.
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unsigned int devtime;
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dc_ticks_t systime;
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// Cached fields.
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unsigned int cached;
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unsigned int divetime;
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unsigned int maxdepth;
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};
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static dc_status_t reefnet_sensusultra_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
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static dc_status_t reefnet_sensusultra_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime);
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static dc_status_t reefnet_sensusultra_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 reefnet_sensusultra_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata);
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static dc_status_t reefnet_sensusultra_parser_destroy (dc_parser_t *abstract);
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static const dc_parser_vtable_t reefnet_sensusultra_parser_vtable = {
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DC_FAMILY_REEFNET_SENSUSULTRA,
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reefnet_sensusultra_parser_set_data, /* set_data */
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reefnet_sensusultra_parser_get_datetime, /* datetime */
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reefnet_sensusultra_parser_get_field, /* fields */
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reefnet_sensusultra_parser_samples_foreach, /* samples_foreach */
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reefnet_sensusultra_parser_destroy /* destroy */
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};
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dc_status_t
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reefnet_sensusultra_parser_create (dc_parser_t **out, dc_context_t *context, unsigned int devtime, dc_ticks_t systime)
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{
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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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reefnet_sensusultra_parser_t *parser = (reefnet_sensusultra_parser_t *) malloc (sizeof (reefnet_sensusultra_parser_t));
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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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// Initialize the base class.
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parser_init (&parser->base, context, &reefnet_sensusultra_parser_vtable);
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// Set the default values.
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parser->atmospheric = ATM;
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parser->hydrostatic = 1025.0 * GRAVITY;
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parser->devtime = devtime;
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parser->systime = systime;
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parser->cached = 0;
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parser->divetime = 0;
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parser->maxdepth = 0;
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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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reefnet_sensusultra_parser_destroy (dc_parser_t *abstract)
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{
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// Free memory.
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free (abstract);
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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reefnet_sensusultra_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size)
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{
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reefnet_sensusultra_parser_t *parser = (reefnet_sensusultra_parser_t*) abstract;
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// Reset the cache.
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parser->cached = 0;
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parser->divetime = 0;
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parser->maxdepth = 0;
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return DC_STATUS_SUCCESS;
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}
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dc_status_t
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reefnet_sensusultra_parser_set_calibration (dc_parser_t *abstract, double atmospheric, double hydrostatic)
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{
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reefnet_sensusultra_parser_t *parser = (reefnet_sensusultra_parser_t*) abstract;
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if (!ISINSTANCE (abstract))
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return DC_STATUS_INVALIDARGS;
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parser->atmospheric = atmospheric;
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parser->hydrostatic = hydrostatic;
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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reefnet_sensusultra_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime)
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{
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reefnet_sensusultra_parser_t *parser = (reefnet_sensusultra_parser_t *) abstract;
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if (abstract->size < 4 + 4)
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return DC_STATUS_DATAFORMAT;
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unsigned int timestamp = array_uint32_le (abstract->data + 4);
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dc_ticks_t ticks = parser->systime - (parser->devtime - timestamp);
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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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reefnet_sensusultra_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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reefnet_sensusultra_parser_t *parser = (reefnet_sensusultra_parser_t *) abstract;
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if (abstract->size < 20)
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return DC_STATUS_DATAFORMAT;
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if (!parser->cached) {
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const unsigned char footer[4] = {0xFF, 0xFF, 0xFF, 0xFF};
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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 interval = array_uint16_le (data + 8);
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unsigned int threshold = array_uint16_le (data + 10);
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unsigned int maxdepth = 0;
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unsigned int nsamples = 0;
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unsigned int offset = 16;
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while (offset + sizeof (footer) <= size &&
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memcmp (data + offset, footer, sizeof (footer)) != 0)
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{
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unsigned int depth = array_uint16_le (data + offset + 2);
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if (depth >= threshold) {
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if (depth > maxdepth)
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maxdepth = depth;
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nsamples++;
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}
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offset += 4;
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}
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parser->cached = 1;
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parser->divetime = nsamples * interval;
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parser->maxdepth = maxdepth;
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}
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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 * BAR / 1000.0 - parser->atmospheric) / parser->hydrostatic;
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break;
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case DC_FIELD_GASMIX_COUNT:
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*((unsigned int *) value) = 0;
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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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reefnet_sensusultra_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata)
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{
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reefnet_sensusultra_parser_t *parser = (reefnet_sensusultra_parser_t*) abstract;
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const unsigned char header[4] = {0x00, 0x00, 0x00, 0x00};
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const unsigned char footer[4] = {0xFF, 0xFF, 0xFF, 0xFF};
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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 offset = 0;
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while (offset + sizeof (header) <= size) {
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if (memcmp (data + offset, header, sizeof (header)) == 0) {
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if (offset + 16 > size)
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return DC_STATUS_DATAFORMAT;
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unsigned int time = 0;
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unsigned int interval = array_uint16_le (data + offset + 8);
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offset += 16;
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while (offset + sizeof (footer) <= size &&
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memcmp (data + offset, footer, sizeof (footer)) != 0)
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{
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dc_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 (DC_SAMPLE_TIME, sample, userdata);
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// Temperature (0.01 °K)
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unsigned int temperature = array_uint16_le (data + offset);
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sample.temperature = temperature / 100.0 - 273.15;
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if (callback) callback (DC_SAMPLE_TEMPERATURE, sample, userdata);
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// Depth (absolute pressure in millibar)
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unsigned int depth = array_uint16_le (data + offset + 2);
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sample.depth = (depth * BAR / 1000.0 - parser->atmospheric) / parser->hydrostatic;
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if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
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offset += 4;
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}
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break;
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} else {
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offset++;
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}
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}
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return DC_STATUS_SUCCESS;
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}
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