156f54302d
Allthough most dive computers always use local time and don't support timezones at all, there are a few exceptions. There are two different sources of timezone information: - Some of the newer Uwatec/Scubapro devices use UTC internally and also support a timezone setting. This UTC offset is currently taken into account to obtain the dive date/time, but the UTC offset itself is lost. - Uwatec/Scubapro and Reefnet devices rely on the clock of the host system to synchronize the internal device clock and calculate the dive date/time. The consequence is that the resulting date/time is always in the timezone of the host system. In order to preserve this timezone information, the dc_datetime_t structure is extended with a new "timezone" field, containing the UTC offset in seconds. Devices without timezone support will set the field to the special value DC_TIMEZONE_NONE. The dc_datetime_localtime() and dc_datetime_gmtime() functions will automatically populate the new field with respectively the local timezone offset and zero. The dc_datetime_mktime() function will take into account the new timezone field for the conversion to UTC. The special value DC_TIMEZONE_NONE is interpreted as zero.
623 lines
18 KiB
C
623 lines
18 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2010 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/units.h>
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#include "mares_iconhd.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), &mares_iconhd_parser_vtable)
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#define SMART 0x000010
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#define SMARTAPNEA 0x010010
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#define ICONHD 0x14
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#define ICONHDNET 0x15
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#define NGASMIXES 3
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#define NTANKS NGASMIXES
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#define AIR 0
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#define GAUGE 1
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#define NITROX 2
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#define FREEDIVE 3
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typedef struct mares_iconhd_parser_t mares_iconhd_parser_t;
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struct mares_iconhd_parser_t {
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dc_parser_t base;
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unsigned int model;
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// Cached fields.
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unsigned int cached;
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unsigned int mode;
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unsigned int nsamples;
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unsigned int footer;
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unsigned int samplesize;
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unsigned int settings;
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unsigned int interval;
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unsigned int samplerate;
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unsigned int ntanks;
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unsigned int ngasmixes;
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unsigned int oxygen[NGASMIXES];
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};
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static dc_status_t mares_iconhd_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
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static dc_status_t mares_iconhd_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime);
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static dc_status_t mares_iconhd_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 mares_iconhd_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata);
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static const dc_parser_vtable_t mares_iconhd_parser_vtable = {
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sizeof(mares_iconhd_parser_t),
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DC_FAMILY_MARES_ICONHD,
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mares_iconhd_parser_set_data, /* set_data */
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mares_iconhd_parser_get_datetime, /* datetime */
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mares_iconhd_parser_get_field, /* fields */
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mares_iconhd_parser_samples_foreach, /* samples_foreach */
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NULL /* destroy */
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};
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static dc_status_t
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mares_iconhd_parser_cache (mares_iconhd_parser_t *parser)
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{
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dc_parser_t *abstract = (dc_parser_t *) parser;
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const unsigned char *data = parser->base.data;
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unsigned int size = parser->base.size;
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if (parser->cached) {
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return DC_STATUS_SUCCESS;
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}
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unsigned int header = 0x5C;
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if (parser->model == ICONHDNET)
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header = 0x80;
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else if (parser->model == SMART)
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header = 4; // Type and number of samples only!
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else if (parser->model == SMARTAPNEA)
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header = 6; // Type and number of samples only!
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if (size < header + 4) {
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ERROR (abstract->context, "Buffer overflow detected!");
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return DC_STATUS_DATAFORMAT;
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}
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unsigned int length = array_uint32_le (data);
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if (length > size) {
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ERROR (abstract->context, "Buffer overflow detected!");
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return DC_STATUS_DATAFORMAT;
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}
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// Get the number of samples in the profile data.
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unsigned int type = 0, nsamples = 0;
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if (parser->model == SMART || parser->model == SMARTAPNEA) {
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type = array_uint16_le (data + length - header + 2);
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nsamples = array_uint16_le (data + length - header + 0);
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} else {
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type = array_uint16_le (data + length - header + 0);
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nsamples = array_uint16_le (data + length - header + 2);
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}
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// Get the dive mode.
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unsigned int mode = type & 0x03;
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// Get the header and sample size.
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unsigned int headersize = 0x5C;
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unsigned int samplesize = 8;
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if (parser->model == ICONHDNET) {
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headersize = 0x80;
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samplesize = 12;
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} else if (parser->model == SMART) {
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if (mode == FREEDIVE) {
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headersize = 0x2E;
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samplesize = 6;
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} else {
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headersize = 0x5C;
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samplesize = 8;
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}
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} else if (parser->model == SMARTAPNEA) {
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headersize = 0x50;
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samplesize = 14;
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}
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if (length < headersize) {
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ERROR (abstract->context, "Buffer overflow detected!");
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return DC_STATUS_DATAFORMAT;
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}
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const unsigned char *p = data + length - headersize;
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if (parser->model != SMART && parser->model != SMARTAPNEA) {
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p += 4;
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}
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// Get the dive settings.
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unsigned int settings = 0;
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if (parser->model == SMARTAPNEA) {
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settings = array_uint16_le (p + 0x1C);
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} else if (parser->mode == FREEDIVE) {
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settings = array_uint16_le (p + 0x08);
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} else {
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settings = array_uint16_le (p + 0x0C);
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}
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// Get the sample interval.
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unsigned int interval = 0;
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unsigned int samplerate = 0;
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if (parser->model == SMARTAPNEA) {
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unsigned int idx = (settings & 0x0600) >> 9;
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interval = 1;
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samplerate = 1 << idx;
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} else {
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const unsigned int intervals[] = {1, 5, 10, 20};
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unsigned int idx = (settings & 0x0C00) >> 10;
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interval = intervals[idx];
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samplerate = 1;
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}
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// Calculate the total number of bytes for this dive.
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unsigned int nbytes = 4 + headersize + nsamples * samplesize;
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if (parser->model == ICONHDNET) {
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nbytes += (nsamples / 4) * 8;
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} else if (parser->model == SMARTAPNEA) {
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unsigned int divetime = array_uint32_le (p + 0x24);
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nbytes += divetime * samplerate * 2;
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}
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if (length != nbytes) {
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ERROR (abstract->context, "Calculated and stored size are not equal.");
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return DC_STATUS_DATAFORMAT;
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}
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// Gas mixes
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unsigned int ngasmixes = 0;
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unsigned int oxygen[NGASMIXES] = {0};
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if (mode == GAUGE || mode == FREEDIVE) {
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ngasmixes = 0;
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} else if (mode == AIR) {
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oxygen[0] = 21;
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ngasmixes = 1;
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} else {
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// Count the number of active gas mixes. The active gas
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// mixes are always first, so we stop counting as soon
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// as the first gas marked as disabled is found.
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ngasmixes = 0;
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while (ngasmixes < NGASMIXES) {
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if (p[0x10 + ngasmixes * 4 + 1] & 0x80)
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break;
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oxygen[ngasmixes] = p[0x10 + ngasmixes * 4];
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ngasmixes++;
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}
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}
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// Tanks
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unsigned int ntanks = 0;
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if (parser->model == ICONHDNET) {
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while (ntanks < NTANKS) {
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unsigned int beginpressure = array_uint16_le (p + 0x58 + ntanks * 4 + 0);
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unsigned int endpressure = array_uint16_le (p + 0x58 + ntanks * 4 + 2);
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if (beginpressure == 0 && (endpressure == 0 || endpressure == 36000))
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break;
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ntanks++;
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}
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}
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// Cache the data for later use.
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parser->mode = mode;
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parser->nsamples = nsamples;
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parser->footer = length - headersize;
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parser->samplesize = samplesize;
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parser->settings = settings;
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parser->interval = interval;
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parser->samplerate = samplerate;
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parser->ntanks = ntanks;
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parser->ngasmixes = ngasmixes;
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for (unsigned int i = 0; i < ngasmixes; ++i) {
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parser->oxygen[i] = oxygen[i];
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}
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parser->cached = 1;
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return DC_STATUS_SUCCESS;
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}
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dc_status_t
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mares_iconhd_parser_create (dc_parser_t **out, dc_context_t *context, unsigned int model)
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{
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mares_iconhd_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 = (mares_iconhd_parser_t *) dc_parser_allocate (context, &mares_iconhd_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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parser->model = model;
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parser->cached = 0;
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parser->mode = AIR;
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parser->nsamples = 0;
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parser->footer = 0;
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parser->samplesize = 0;
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parser->settings = 0;
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parser->interval = 0;
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parser->samplerate = 0;
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parser->ntanks = 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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}
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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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mares_iconhd_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size)
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{
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mares_iconhd_parser_t *parser = (mares_iconhd_parser_t *) abstract;
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// Reset the cache.
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parser->cached = 0;
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parser->mode = AIR;
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parser->nsamples = 0;
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parser->footer = 0;
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parser->samplesize = 0;
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parser->settings = 0;
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parser->interval = 0;
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parser->samplerate = 0;
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parser->ntanks = 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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}
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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mares_iconhd_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime)
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{
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mares_iconhd_parser_t *parser = (mares_iconhd_parser_t *) abstract;
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// Cache the parser data.
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dc_status_t rc = mares_iconhd_parser_cache (parser);
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if (rc != DC_STATUS_SUCCESS)
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return rc;
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const unsigned char *p = abstract->data + parser->footer;
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if (parser->model == SMART) {
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if (parser->mode == FREEDIVE) {
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p += 0x20;
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} else {
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p += 2;
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}
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} else if (parser->model == SMARTAPNEA) {
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p += 0x40;
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} else {
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p += 6;
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}
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if (datetime) {
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datetime->hour = array_uint16_le (p + 0);
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datetime->minute = array_uint16_le (p + 2);
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datetime->second = 0;
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datetime->day = array_uint16_le (p + 4);
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datetime->month = array_uint16_le (p + 6) + 1;
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datetime->year = array_uint16_le (p + 8) + 1900;
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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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mares_iconhd_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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mares_iconhd_parser_t *parser = (mares_iconhd_parser_t *) abstract;
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// Cache the parser data.
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dc_status_t rc = mares_iconhd_parser_cache (parser);
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if (rc != DC_STATUS_SUCCESS)
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return rc;
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const unsigned char *p = abstract->data + parser->footer;
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if (parser->model != SMART && parser->model != SMARTAPNEA) {
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p += 4;
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}
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unsigned int volume = 0, workpressure = 0;
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dc_gasmix_t *gasmix = (dc_gasmix_t *) value;
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dc_tank_t *tank = (dc_tank_t *) value;
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dc_salinity_t *water = (dc_salinity_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 (parser->model == SMARTAPNEA) {
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*((unsigned int *) value) = array_uint16_le (p + 0x24);
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} else if (parser->mode == FREEDIVE) {
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unsigned int divetime = 0;
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unsigned int offset = 4;
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for (unsigned int i = 0; i < parser->nsamples; ++i) {
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divetime += array_uint16_le (abstract->data + offset + 2);
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offset += parser->samplesize;
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}
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*((unsigned int *) value) = divetime;
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} else {
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*((unsigned int *) value) = parser->nsamples * parser->interval;
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}
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break;
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case DC_FIELD_MAXDEPTH:
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if (parser->model == SMARTAPNEA)
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*((double *) value) = array_uint16_le (p + 0x3A) / 10.0;
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else if (parser->mode == FREEDIVE)
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*((double *) value) = array_uint16_le (p + 0x1A) / 10.0;
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else
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*((double *) value) = array_uint16_le (p + 0x00) / 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->oxygen = parser->oxygen[flags] / 100.0;
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gasmix->helium = 0.0;
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gasmix->nitrogen = 1.0 - gasmix->oxygen - gasmix->helium;
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break;
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case DC_FIELD_TANK_COUNT:
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*((unsigned int *) value) = parser->ntanks;
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break;
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case DC_FIELD_TANK:
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volume = array_uint16_le (p + 0x64 + flags * 8 + 0);
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workpressure = array_uint16_le (p + 0x64 + flags * 8 + 2);
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if (parser->settings & 0x0100) {
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tank->type = DC_TANKVOLUME_METRIC;
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tank->volume = volume;
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tank->workpressure = workpressure;
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} else {
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if (workpressure == 0)
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return DC_STATUS_DATAFORMAT;
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tank->type = DC_TANKVOLUME_IMPERIAL;
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tank->volume = volume * CUFT * 1000.0;
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tank->volume /= workpressure * PSI / ATM;
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tank->workpressure = workpressure * PSI / BAR;
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}
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tank->beginpressure = array_uint16_le (p + 0x58 + flags * 4 + 0) / 100.0;
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tank->endpressure = array_uint16_le (p + 0x58 + flags * 4 + 2) / 100.0;
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if (flags < parser->ngasmixes) {
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tank->gasmix = flags;
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} else {
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tank->gasmix = DC_GASMIX_UNKNOWN;
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}
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break;
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case DC_FIELD_ATMOSPHERIC:
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// Pressure (1/8 millibar)
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if (parser->model == SMARTAPNEA)
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*((double *) value) = array_uint16_le (p + 0x38) / 1000.0;
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else if (parser->mode == FREEDIVE)
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*((double *) value) = array_uint16_le (p + 0x18) / 1000.0;
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else
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*((double *) value) = array_uint16_le (p + 0x22) / 8000.0;
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break;
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case DC_FIELD_SALINITY:
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if (parser->model == SMARTAPNEA) {
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unsigned int salinity = parser->settings & 0x003F;
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if (salinity == 0) {
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water->type = DC_WATER_FRESH;
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} else {
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water->type = DC_WATER_SALT;
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}
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water->density = 1000.0 + salinity;
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} else {
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if (parser->settings & 0x0010) {
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water->type = DC_WATER_FRESH;
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} else {
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water->type = DC_WATER_SALT;
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}
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water->density = 0.0;
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}
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break;
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case DC_FIELD_TEMPERATURE_MINIMUM:
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if (parser->model == SMARTAPNEA)
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*((double *) value) = (signed short) array_uint16_le (p + 0x3C) / 10.0;
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else if (parser->mode == FREEDIVE)
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*((double *) value) = (signed short) array_uint16_le (p + 0x1C) / 10.0;
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else
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*((double *) value) = (signed short) array_uint16_le (p + 0x42) / 10.0;
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break;
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case DC_FIELD_TEMPERATURE_MAXIMUM:
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if (parser->model == SMARTAPNEA)
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*((double *) value) = (signed short) array_uint16_le (p + 0x3E) / 10.0;
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else if (parser->mode == FREEDIVE)
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*((double *) value) = (signed short) array_uint16_le (p + 0x1E) / 10.0;
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else
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*((double *) value) = (signed short) array_uint16_le (p + 0x44) / 10.0;
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break;
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case DC_FIELD_DIVEMODE:
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switch (parser->mode) {
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case AIR:
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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:
|
|
return DC_STATUS_DATAFORMAT;
|
|
}
|
|
break;
|
|
default:
|
|
return DC_STATUS_UNSUPPORTED;
|
|
}
|
|
}
|
|
|
|
return DC_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
static dc_status_t
|
|
mares_iconhd_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata)
|
|
{
|
|
mares_iconhd_parser_t *parser = (mares_iconhd_parser_t *) abstract;
|
|
|
|
// Cache the parser data.
|
|
dc_status_t rc = mares_iconhd_parser_cache (parser);
|
|
if (rc != DC_STATUS_SUCCESS)
|
|
return rc;
|
|
|
|
const unsigned char *data = abstract->data;
|
|
|
|
if (parser->samplerate > 1) {
|
|
// The Smart Apnea supports multiple samples per second
|
|
// (e.g. 2, 4 or 8). Since our smallest unit of time is one
|
|
// second, we can't represent this, and the extra samples
|
|
// will get dropped.
|
|
WARNING(abstract->context, "Multiple samples per second are not supported!");
|
|
}
|
|
|
|
// Previous gas mix - initialize with impossible value
|
|
unsigned int gasmix_previous = 0xFFFFFFFF;
|
|
|
|
unsigned int time = 0;
|
|
unsigned int offset = 4;
|
|
unsigned int nsamples = 0;
|
|
while (nsamples < parser->nsamples) {
|
|
dc_sample_value_t sample = {0};
|
|
|
|
if (parser->model == SMARTAPNEA) {
|
|
unsigned int maxdepth = array_uint16_le (data + offset + 0);
|
|
unsigned int divetime = array_uint16_le (data + offset + 2);
|
|
unsigned int surftime = array_uint16_le (data + offset + 4);
|
|
|
|
// Surface Time (seconds).
|
|
time += surftime;
|
|
sample.time = time;
|
|
if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
|
|
|
|
// Surface Depth (0 m).
|
|
sample.depth = 0.0;
|
|
if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
|
|
|
|
offset += parser->samplesize;
|
|
nsamples++;
|
|
|
|
for (unsigned int i = 0; i < divetime; ++i) {
|
|
// Time (seconds).
|
|
time += parser->interval;
|
|
sample.time = time;
|
|
if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
|
|
|
|
// Depth (1/10 m).
|
|
unsigned int depth = array_uint16_le (data + offset);
|
|
sample.depth = depth / 10.0;
|
|
if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
|
|
|
|
offset += 2 * parser->samplerate;
|
|
}
|
|
} else if (parser->mode == FREEDIVE) {
|
|
unsigned int maxdepth = array_uint16_le (data + offset + 0);
|
|
unsigned int divetime = array_uint16_le (data + offset + 2);
|
|
unsigned int surftime = array_uint16_le (data + offset + 4);
|
|
|
|
// Surface Time (seconds).
|
|
time += surftime;
|
|
sample.time = time;
|
|
if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
|
|
|
|
// Surface Depth (0 m).
|
|
sample.depth = 0.0;
|
|
if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
|
|
|
|
// Dive Time (seconds).
|
|
time += divetime;
|
|
sample.time = time;
|
|
if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
|
|
|
|
// Maximum Depth (1/10 m).
|
|
sample.depth = maxdepth / 10.0;
|
|
if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
|
|
|
|
offset += parser->samplesize;
|
|
nsamples++;
|
|
} else {
|
|
// Time (seconds).
|
|
time += parser->interval;
|
|
sample.time = time;
|
|
if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
|
|
|
|
// Depth (1/10 m).
|
|
unsigned int depth = array_uint16_le (data + offset + 0);
|
|
sample.depth = depth / 10.0;
|
|
if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
|
|
|
|
// Temperature (1/10 °C).
|
|
unsigned int temperature = array_uint16_le (data + offset + 2) & 0x0FFF;
|
|
sample.temperature = temperature / 10.0;
|
|
if (callback) callback (DC_SAMPLE_TEMPERATURE, sample, userdata);
|
|
|
|
// Current gas mix
|
|
unsigned int gasmix = (data[offset + 3] & 0xF0) >> 4;
|
|
if (parser->ngasmixes > 0) {
|
|
if (gasmix >= parser->ngasmixes) {
|
|
ERROR (abstract->context, "Invalid gas mix index.");
|
|
return DC_STATUS_DATAFORMAT;
|
|
}
|
|
if (gasmix != gasmix_previous) {
|
|
sample.gasmix = gasmix;
|
|
if (callback) callback (DC_SAMPLE_GASMIX, sample, userdata);
|
|
gasmix_previous = gasmix;
|
|
}
|
|
}
|
|
|
|
offset += parser->samplesize;
|
|
nsamples++;
|
|
|
|
// Some extra data.
|
|
if (parser->model == ICONHDNET && (nsamples % 4) == 0) {
|
|
// Pressure (1/100 bar).
|
|
unsigned int pressure = array_uint16_le(data + offset);
|
|
if (gasmix < parser->ntanks) {
|
|
sample.pressure.tank = gasmix;
|
|
sample.pressure.value = pressure / 100.0;
|
|
if (callback) callback (DC_SAMPLE_PRESSURE, sample, userdata);
|
|
} else if (pressure != 0) {
|
|
WARNING (abstract->context, "Invalid tank with non-zero pressure.");
|
|
}
|
|
|
|
offset += 8;
|
|
}
|
|
}
|
|
}
|
|
|
|
return DC_STATUS_SUCCESS;
|
|
}
|