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GPS accuracy indicator in map working
1 | /* |
2 | * Copyright (C) 2008 Till Harbaum <till@harbaum.org>. |
3 | * |
4 | * This file is part of GPXView. |
5 | * |
6 | * GPXView is free software: you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation, either version 3 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * GPXView is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with GPXView. If not, see <http://www.gnu.org/licenses/>. |
18 | */ |
19 | |
20 | #include <stdio.h> |
21 | #include <string.h> |
22 | #include <math.h> |
23 | |
24 | #include "gpxview.h" |
25 | |
26 | |
27 | #ifdef USE_MAEMO |
28 | #ifdef ENABLE_GPSBT |
29 | #include <gpsbt.h> |
30 | #include <gpsmgr.h> |
31 | #endif |
32 | #include <errno.h> |
33 | #endif |
34 | |
35 | #ifndef ENABLE_LIBLOCATION |
36 | |
37 | /* maybe user configurable later on ... */ |
38 | #define GPSD_HOST "127.0.0.1" |
39 | #define GPSD_PORT 2947 |
40 | |
41 | gps_sat_t *gps_get_sats(appdata_t *appdata) { |
42 | gps_sat_t *retval = NULL; |
43 | |
44 | g_mutex_lock(appdata->gps_state->mutex); |
45 | if(appdata->gps_state->gpsdata.set & SATELLITE_SET) { |
46 | int i; |
47 | retval = malloc(sizeof(gps_sat_t)); |
48 | retval->num = appdata->gps_state->gpsdata.satellites; |
49 | |
50 | retval->PRN = malloc(sizeof(int)*retval->num); |
51 | retval->used = malloc(sizeof(int)*retval->num); |
52 | retval->ss = malloc(sizeof(int)*retval->num); |
53 | |
54 | if(retval->num) { |
55 | for(i=0;i<retval->num;i++) { |
56 | retval->PRN[i] = appdata->gps_state->gpsdata.PRN[i]; |
57 | retval->ss[i] = appdata->gps_state->gpsdata.ss[i]; |
58 | retval->used[i] = appdata->gps_state->gpsdata.used[i]; |
59 | } |
60 | } |
61 | } |
62 | |
63 | g_mutex_unlock(appdata->gps_state->mutex); |
64 | |
65 | return retval; |
66 | } |
67 | |
68 | pos_t *gps_get_pos(appdata_t *appdata) { |
69 | static pos_t retval; |
70 | |
71 | retval.lat = NAN; |
72 | |
73 | g_mutex_lock(appdata->gps_state->mutex); |
74 | if(appdata->gps_state->gpsdata.set & STATUS_SET) |
75 | if(appdata->gps_state->gpsdata.status != STATUS_NO_FIX) |
76 | if(appdata->gps_state->gpsdata.set & LATLON_SET) |
77 | retval = appdata->gps_state->gpsdata.fix.pos; |
78 | |
79 | g_mutex_unlock(appdata->gps_state->mutex); |
80 | |
81 | if(isnan(retval.lat)) |
82 | return NULL; |
83 | |
84 | return &retval; |
85 | } |
86 | |
87 | float gps_get_heading(appdata_t *appdata) { |
88 | float retval = NAN; |
89 | |
90 | g_mutex_lock(appdata->gps_state->mutex); |
91 | if(appdata->gps_state->gpsdata.set & STATUS_SET) |
92 | if(appdata->gps_state->gpsdata.status != STATUS_NO_FIX) |
93 | if(appdata->gps_state->gpsdata.set & TRACK_SET) |
94 | retval = appdata->gps_state->gpsdata.fix.track; |
95 | |
96 | g_mutex_unlock(appdata->gps_state->mutex); |
97 | return retval; |
98 | } |
99 | |
100 | float gps_get_eph(appdata_t *appdata) { |
101 | float retval = NAN; |
102 | |
103 | g_mutex_lock(appdata->gps_state->mutex); |
104 | if(appdata->gps_state->gpsdata.set & STATUS_SET) |
105 | if(appdata->gps_state->gpsdata.status != STATUS_NO_FIX) |
106 | retval = appdata->gps_state->gpsdata.fix.eph; |
107 | |
108 | g_mutex_unlock(appdata->gps_state->mutex); |
109 | return retval; |
110 | } |
111 | |
112 | static int gps_connect(gps_state_t *gps_state) { |
113 | GnomeVFSResult vfs_result; |
114 | #ifdef USE_MAEMO |
115 | char errstr[256] = ""; |
116 | |
117 | /* We need to start gpsd (via gpsbt) first. */ |
118 | memset(&gps_state->context, 0, sizeof(gpsbt_t)); |
119 | errno = 0; |
120 | |
121 | if(gpsbt_start(NULL, 0, 0, 0, errstr, sizeof(errstr), |
122 | 0, &gps_state->context) < 0) { |
123 | printf("Error connecting to GPS receiver: (%d) %s (%s)\n", |
124 | errno, strerror(errno), errstr); |
125 | } |
126 | #endif |
127 | |
128 | /************** from here down pure gnome/gtk/gpsd ********************/ |
129 | |
130 | /* try to connect to gpsd */ |
131 | /* Create a socket to interact with GPSD. */ |
132 | |
133 | int retries = 5; |
134 | while(retries && |
135 | (GNOME_VFS_OK != (vfs_result = gnome_vfs_inet_connection_create( |
136 | &gps_state->iconn, GPSD_HOST, GPSD_PORT, NULL)))) { |
137 | printf("Error creating connection to GPSD, retrying ...\n"); |
138 | |
139 | retries--; |
140 | sleep(1); |
141 | } |
142 | |
143 | if(!retries) { |
144 | printf("Finally failed ...\n"); |
145 | return -1; |
146 | } |
147 | |
148 | retries = 5; |
149 | while(retries && ((gps_state->socket = |
150 | gnome_vfs_inet_connection_to_socket(gps_state->iconn)) == NULL)) { |
151 | printf("Error creating connecting GPSD socket, retrying ...\n"); |
152 | |
153 | retries--; |
154 | sleep(1); |
155 | } |
156 | |
157 | if(!retries) { |
158 | printf("Finally failed ...\n"); |
159 | return -1; |
160 | } |
161 | |
162 | GTimeVal timeout = { 10, 0 }; |
163 | if(GNOME_VFS_OK != (vfs_result = gnome_vfs_socket_set_timeout( |
164 | gps_state->socket, &timeout, NULL))) { |
165 | printf("Error setting GPSD timeout\n"); |
166 | return -1; |
167 | } |
168 | |
169 | printf("GPSD connected ...\n"); |
170 | |
171 | return 0; |
172 | } |
173 | |
174 | void gps_clear_fix(struct gps_fix_t *fixp) { |
175 | fixp->mode = MODE_NOT_SEEN; |
176 | fixp->pos.lat = fixp->pos.lon = NAN; |
177 | fixp->track = NAN; |
178 | fixp->speed = NAN; |
179 | fixp->climb = NAN; |
180 | fixp->altitude = NAN; |
181 | fixp->ept = NAN; |
182 | fixp->eph = NAN; |
183 | fixp->epd = NAN; |
184 | fixp->eps = NAN; |
185 | fixp->epc = NAN; |
186 | } |
187 | |
188 | /* unpack a daemon response into a status structure */ |
189 | static void gps_unpack(char *buf, struct gps_data_t *gpsdata) { |
190 | char *ns, *sp, *tp; |
191 | |
192 | for(ns = buf; ns; ns = strstr(ns+1, "GPSD")) { |
193 | if(strncmp(ns, "GPSD", 4) == 0) { |
194 | /* the following should execute each time we have a good next sp */ |
195 | for (sp = ns + 5; *sp != '\0'; sp = tp+1) { |
196 | tp = sp + strcspn(sp, ",\r\n"); |
197 | if (*tp == '\0') tp--; |
198 | else *tp = '\0'; |
199 | |
200 | switch (*sp) { |
201 | case 'A': |
202 | if (sp[2] == '?') { |
203 | gpsdata->fix.altitude = NAN; |
204 | } else { |
205 | (void)sscanf(sp, "A=%lf", &gpsdata->fix.altitude); |
206 | gpsdata->set |= ALTITUDE_SET; |
207 | } |
208 | break; |
209 | /* B - baudrate isn't supported by gpxview */ |
210 | /* C - cycle isn't supported by gpxview */ |
211 | /* D - utc time isn't supported by gpxview */ |
212 | case 'E': |
213 | gpsdata->fix.eph = NAN; |
214 | /* epe should always be present if eph or epv is */ |
215 | if (sp[2] != '?') { |
216 | char epe[20], eph[20], epv[20]; |
217 | (void)sscanf(sp, "E=%s %s %s", epe, eph, epv); |
218 | #define DEFAULT(val) (val[0] == '?') ? NAN : g_ascii_strtod(val, NULL) |
219 | gpsdata->fix.eph = DEFAULT(eph); |
220 | #undef DEFAULT |
221 | } |
222 | break; |
223 | /* F - device name isn't supported by gpxview */ |
224 | /* I - gps id isn't supported by gpxview */ |
225 | /* K - known devices list isn't supported by gpxview */ |
226 | case 'M': |
227 | if (sp[2] == '?') { |
228 | gpsdata->fix.mode = MODE_NOT_SEEN; |
229 | } else { |
230 | gpsdata->fix.mode = atoi(sp+2); |
231 | gpsdata->set |= MODE_SET; |
232 | } |
233 | break; |
234 | /* N - driver mode reporting isn't supported by gpxview */ |
235 | case 'O': |
236 | if (sp[2] == '?') { |
237 | gpsdata->set = |
238 | (gpsdata->set & SATELLITE_SET) | // fix for below |
239 | MODE_SET | STATUS_SET; // this clears sat info?? |
240 | gpsdata->status = STATUS_NO_FIX; |
241 | gps_clear_fix(&gpsdata->fix); |
242 | } else { |
243 | struct gps_fix_t nf; |
244 | char tag[MAXTAGLEN+1], alt[20]; |
245 | char eph[20], epv[20], track[20],speed[20], climb[20]; |
246 | char epd[20], eps[20], epc[20], mode[2]; |
247 | char timestr[20], ept[20], lat[20], lon[20]; |
248 | int st = sscanf(sp+2, |
249 | "%8s %19s %19s %19s %19s %19s %19s %19s %19s %19s %19s %19s %19s %19s %1s", |
250 | tag, timestr, ept, lat, lon, |
251 | alt, eph, epv, track, speed, climb, |
252 | epd, eps, epc, mode); |
253 | if (st >= 14) { |
254 | #define DEFAULT(val) (val[0] == '?') ? NAN : g_ascii_strtod(val, NULL) |
255 | nf.pos.lat = DEFAULT(lat); |
256 | nf.pos.lon = DEFAULT(lon); |
257 | nf.ept = DEFAULT(ept); |
258 | nf.altitude = DEFAULT(alt); |
259 | nf.eph = DEFAULT(eph); |
260 | nf.track = DEFAULT(track); |
261 | nf.speed = DEFAULT(speed); |
262 | nf.climb = DEFAULT(climb); |
263 | nf.epd = DEFAULT(epd); |
264 | nf.eps = DEFAULT(eps); |
265 | nf.epc = DEFAULT(epc); |
266 | #undef DEFAULT |
267 | if (st >= 15) |
268 | nf.mode = (mode[0] == '?') ? MODE_NOT_SEEN : atoi(mode); |
269 | else |
270 | nf.mode = (alt[0] == '?') ? MODE_2D : MODE_3D; |
271 | if (alt[0] != '?') |
272 | gpsdata->set |= ALTITUDE_SET | CLIMB_SET; |
273 | if (isnan(nf.eph)==0) |
274 | gpsdata->set |= HERR_SET; |
275 | if (isnan(nf.track)==0) |
276 | gpsdata->set |= TRACK_SET | SPEED_SET; |
277 | if (isnan(nf.eps)==0) |
278 | gpsdata->set |= SPEEDERR_SET; |
279 | if (isnan(nf.epc)==0) |
280 | gpsdata->set |= CLIMBERR_SET; |
281 | gpsdata->fix = nf; |
282 | gpsdata->set |= TIME_SET|TIMERR_SET|LATLON_SET|MODE_SET; |
283 | gpsdata->status = STATUS_FIX; |
284 | gpsdata->set |= STATUS_SET; |
285 | } |
286 | } |
287 | break; |
288 | case 'P': |
289 | if (sp[2] == '?') { |
290 | gpsdata->fix.pos.lat = NAN; |
291 | gpsdata->fix.pos.lon = NAN; |
292 | } else { |
293 | char lat[20], lon[20]; |
294 | (void)sscanf(sp, "P=%19s %19s", lat, lon); |
295 | gpsdata->fix.pos.lat = g_ascii_strtod(lat, NULL); |
296 | gpsdata->fix.pos.lon = g_ascii_strtod(lon, NULL); |
297 | gpsdata->set |= LATLON_SET; |
298 | } |
299 | break; |
300 | case 'Q': |
301 | if (sp[2] == '?') { |
302 | gpsdata->satellites_used = 0; |
303 | gpsdata->pdop = 0; |
304 | gpsdata->hdop = 0; |
305 | gpsdata->vdop = 0; |
306 | } else { |
307 | (void)sscanf(sp, "Q=%d %lf %lf %lf %lf %lf", |
308 | &gpsdata->satellites_used, |
309 | &gpsdata->pdop, |
310 | &gpsdata->hdop, |
311 | &gpsdata->vdop, |
312 | &gpsdata->tdop, |
313 | &gpsdata->gdop); |
314 | gpsdata->set |= HDOP_SET | VDOP_SET | PDOP_SET; |
315 | } |
316 | break; |
317 | case 'S': |
318 | if (sp[2] == '?') { |
319 | gpsdata->status = -1; |
320 | } else { |
321 | gpsdata->status = atoi(sp+2); |
322 | gpsdata->set |= STATUS_SET; |
323 | } |
324 | break; |
325 | case 'T': |
326 | if (sp[2] == '?') { |
327 | gpsdata->fix.track = NAN; |
328 | } else { |
329 | (void)sscanf(sp, "T=%lf", &gpsdata->fix.track); |
330 | gpsdata->set |= TRACK_SET; |
331 | } |
332 | break; |
333 | case 'U': |
334 | if (sp[2] == '?') { |
335 | gpsdata->fix.climb = NAN; |
336 | } else { |
337 | (void)sscanf(sp, "U=%lf", &gpsdata->fix.climb); |
338 | gpsdata->set |= CLIMB_SET; |
339 | } |
340 | break; |
341 | case 'V': |
342 | if (sp[2] == '?') { |
343 | gpsdata->fix.speed = NAN; |
344 | } else { |
345 | (void)sscanf(sp, "V=%lf", &gpsdata->fix.speed); |
346 | /* V reply is in kt, fix.speed is in metres/sec */ |
347 | gpsdata->fix.speed = gpsdata->fix.speed / MPS_TO_KNOTS; |
348 | gpsdata->set |= SPEED_SET; |
349 | } |
350 | break; |
351 | case 'X': |
352 | if (sp[2] == '?') |
353 | gpsdata->online = -1; |
354 | else { |
355 | (void)sscanf(sp, "X=%lf", &gpsdata->online); |
356 | gpsdata->set |= ONLINE_SET; |
357 | } |
358 | break; |
359 | case 'Y': |
360 | if (sp[2] == '?') { |
361 | gpsdata->satellites = 0; |
362 | } else { |
363 | int j, i1, i2, i3, i4, i5; |
364 | int PRN[MAXCHANNELS]; |
365 | int elevation[MAXCHANNELS], azimuth[MAXCHANNELS]; |
366 | int ss[MAXCHANNELS], used[MAXCHANNELS]; |
367 | char tag[MAXTAGLEN+1], timestamp[21]; |
368 | |
369 | (void)sscanf(sp, "Y=%8s %20s %d ", |
370 | tag, timestamp, &gpsdata->satellites); |
371 | for (j = 0; j < gpsdata->satellites; j++) { |
372 | PRN[j]=elevation[j]=azimuth[j]=ss[j]=used[j]=0; |
373 | } |
374 | // printf("sats = %d\n", gpsdata->satellites); |
375 | for (j = 0, gpsdata->satellites_used = 0; j < gpsdata->satellites; j++) { |
376 | if ((sp != NULL) && ((sp = strchr(sp, ':')) != NULL)) { |
377 | sp++; |
378 | (void)sscanf(sp, "%d %d %d %d %d", &i1, &i2, &i3, &i4, &i5); |
379 | PRN[j] = i1; |
380 | elevation[j] = i2; azimuth[j] = i3; |
381 | ss[j] = i4; used[j] = i5; |
382 | if (i5 == 1) |
383 | gpsdata->satellites_used++; |
384 | } |
385 | } |
386 | memcpy(gpsdata->PRN, PRN, sizeof(PRN)); |
387 | memcpy(gpsdata->elevation, elevation, sizeof(elevation)); |
388 | memcpy(gpsdata->azimuth, azimuth,sizeof(azimuth)); |
389 | memcpy(gpsdata->ss, ss, sizeof(ss)); |
390 | memcpy(gpsdata->used, used, sizeof(used)); |
391 | /*@ +compdef @*/ |
392 | } |
393 | gpsdata->set |= SATELLITE_SET; |
394 | break; |
395 | /* Z and $ - profiling isn't supported by gpxview */ |
396 | } |
397 | } |
398 | } |
399 | } |
400 | } |
401 | |
402 | gpointer gps_thread(gpointer data) { |
403 | GnomeVFSFileSize bytes_read; |
404 | GnomeVFSResult vfs_result; |
405 | char str[512]; |
406 | appdata_t *appdata = (appdata_t*)data; |
407 | int cnt=1000; |
408 | |
409 | const char *msg_pos = "o\r\n"; /* pos request */ |
410 | const char *msg_sat = "y\r\n"; /* sat request */ |
411 | |
412 | appdata->gps_state->gpsdata.set = 0; |
413 | |
414 | gboolean connected = FALSE; |
415 | |
416 | while(1) { |
417 | if(appdata->use_gps) { |
418 | if(!connected) { |
419 | printf("trying to connect\n"); |
420 | |
421 | if(gps_connect(appdata->gps_state) < 0) |
422 | sleep(10); |
423 | else |
424 | connected = TRUE; |
425 | } else { |
426 | const char *msg; |
427 | if(!cnt) msg = msg_sat; |
428 | else msg = msg_pos; |
429 | |
430 | if(GNOME_VFS_OK == |
431 | (vfs_result = gnome_vfs_socket_write(appdata->gps_state->socket, |
432 | msg, strlen(msg)+1, &bytes_read, NULL))) { |
433 | |
434 | /* update every second, wait here to make sure a complete */ |
435 | /* reply is received */ |
436 | if(cnt <= 1) usleep(500000); |
437 | else sleep(1); |
438 | |
439 | if(bytes_read == (strlen(msg)+1)) { |
440 | vfs_result = gnome_vfs_socket_read(appdata->gps_state->socket, |
441 | str, sizeof(str)-1, &bytes_read, NULL); |
442 | if(vfs_result == GNOME_VFS_OK) { |
443 | str[bytes_read] = 0; |
444 | |
445 | // printf("msg: %s (%d)\n", str, strlen(str)); |
446 | |
447 | g_mutex_lock(appdata->gps_state->mutex); |
448 | |
449 | if(!cnt) appdata->gps_state->gpsdata.set &= ~SATELLITE_SET; |
450 | else appdata->gps_state->gpsdata.set &= |
451 | ~(TIME_SET|TIMERR_SET|LATLON_SET|MODE_SET|STATUS_SET); |
452 | |
453 | gps_unpack(str, &appdata->gps_state->gpsdata); |
454 | g_mutex_unlock(appdata->gps_state->mutex); |
455 | } |
456 | } |
457 | } |
458 | if(cnt++ >= 5) cnt = 0; |
459 | } |
460 | } else { |
461 | if(connected) { |
462 | printf("stopping GPS connection due to user request\n"); |
463 | gnome_vfs_inet_connection_destroy(appdata->gps_state->iconn, NULL); |
464 | |
465 | #ifdef USE_MAEMO |
466 | gpsbt_stop(&appdata->gps_state->context); |
467 | #endif |
468 | connected = FALSE; |
469 | } else |
470 | sleep(1); |
471 | } |
472 | } |
473 | |
474 | printf("GPS thread ended???\n"); |
475 | return NULL; |
476 | } |
477 | |
478 | void gps_init(appdata_t *appdata) { |
479 | appdata->gps_state = g_new0(gps_state_t, 1); |
480 | |
481 | /* start a new thread to listen to gpsd */ |
482 | appdata->gps_state->mutex = g_mutex_new(); |
483 | appdata->gps_state->thread_p = |
484 | g_thread_create(gps_thread, appdata, FALSE, NULL); |
485 | } |
486 | |
487 | void gps_release(appdata_t *appdata) { |
488 | #ifdef USE_MAEMO |
489 | gpsbt_stop(&appdata->gps_state->context); |
490 | #endif |
491 | g_free(appdata->gps_state); |
492 | } |
493 | |
494 | #else |
495 | |
496 | static void |
497 | location_changed(LocationGPSDevice *device, gps_state_t *gps_state) { |
498 | |
499 | gps_state->fields = device->fix->fields; |
500 | |
501 | if(gps_state->fields & LOCATION_GPS_DEVICE_LATLONG_SET) { |
502 | gps_state->latitude = device->fix->latitude; |
503 | gps_state->longitude = device->fix->longitude; |
504 | gps_state->eph = device->fix->eph/100.0; // we want eph in meters |
505 | } |
506 | |
507 | if(gps_state->fields & LOCATION_GPS_DEVICE_TRACK_SET) |
508 | gps_state->heading = device->fix->track; |
509 | |
510 | /* update list of sattelites */ |
511 | |
512 | /* free old list */ |
513 | if(gps_state->sats.num) { |
514 | g_free(gps_state->sats.PRN); |
515 | g_free(gps_state->sats.used); |
516 | g_free(gps_state->sats.ss); |
517 | gps_state->sats.num = 0; |
518 | } |
519 | |
520 | /* build new one */ |
521 | if(device->satellites_in_view) { |
522 | gps_state->sats.PRN = g_new0(int, device->satellites_in_view); |
523 | gps_state->sats.used = g_new0(int, device->satellites_in_view); |
524 | gps_state->sats.ss = g_new0(int, device->satellites_in_view); |
525 | |
526 | int i; |
527 | for(i=0;i<device->satellites_in_view;i++) { |
528 | LocationGPSDeviceSatellite *sat = |
529 | g_ptr_array_index(device->satellites, i); |
530 | |
531 | gps_state->sats.PRN[i] = sat->prn; |
532 | gps_state->sats.used[i] = sat->in_use; |
533 | gps_state->sats.ss[i] = sat->signal_strength; |
534 | } |
535 | |
536 | gps_state->sats.num = device->satellites_in_view; |
537 | } |
538 | } |
539 | |
540 | void gps_init(appdata_t *appdata) { |
541 | gps_state_t *gps_state = appdata->gps_state = g_new0(gps_state_t, 1); |
542 | |
543 | printf("GPS init: Using liblocation\n"); |
544 | |
545 | gps_state->device = g_object_new(LOCATION_TYPE_GPS_DEVICE, NULL); |
546 | if(!gps_state->device) { |
547 | printf("Unable to connect to liblocation\n"); |
548 | return; |
549 | } |
550 | |
551 | gps_state->idd_changed = |
552 | g_signal_connect(gps_state->device, "changed", |
553 | G_CALLBACK(location_changed), gps_state); |
554 | |
555 | gps_state->control = location_gpsd_control_get_default(); |
556 | |
557 | if(gps_state->control |
558 | #if MAEMO_VERSION_MAJOR < 5 |
559 | && gps_state->control->can_control |
560 | #endif |
561 | ) { |
562 | |
563 | printf("Having control over GPSD and GPS is to be enabled, starting it\n"); |
564 | location_gpsd_control_start(gps_state->control); |
565 | } |
566 | } |
567 | |
568 | void gps_release(appdata_t *appdata) { |
569 | gps_state_t *gps_state = appdata->gps_state; |
570 | |
571 | if(!gps_state->device) return; |
572 | |
573 | if(gps_state->control |
574 | #if MAEMO_VERSION_MAJOR < 5 |
575 | && gps_state->control->can_control |
576 | #endif |
577 | ) { |
578 | printf("Having control over GPSD, stopping it\n"); |
579 | location_gpsd_control_stop(gps_state->control); |
580 | } |
581 | |
582 | /* Disconnect signal */ |
583 | g_signal_handler_disconnect(gps_state->device, gps_state->idd_changed); |
584 | |
585 | g_free(appdata->gps_state); |
586 | appdata->gps_state = NULL; |
587 | } |
588 | |
589 | pos_t *gps_get_pos(appdata_t *appdata) { |
590 | static pos_t pos; |
591 | |
592 | if(!appdata->use_gps) |
593 | return NULL; |
594 | |
595 | gps_state_t *gps_state = appdata->gps_state; |
596 | |
597 | if(!(gps_state->fields & LOCATION_GPS_DEVICE_LATLONG_SET)) |
598 | return NULL; |
599 | |
600 | pos.lat = gps_state->latitude; |
601 | pos.lon = gps_state->longitude; |
602 | |
603 | return &pos; |
604 | } |
605 | |
606 | float gps_get_heading(appdata_t *appdata) { |
607 | gps_state_t *gps_state = appdata->gps_state; |
608 | |
609 | if(!(gps_state->fields & LOCATION_GPS_DEVICE_TRACK_SET)) |
610 | return NAN; |
611 | |
612 | return gps_state->heading; |
613 | } |
614 | |
615 | float gps_get_eph(appdata_t *appdata) { |
616 | gps_state_t *gps_state = appdata->gps_state; |
617 | |
618 | if(!(gps_state->fields & LOCATION_GPS_DEVICE_LATLONG_SET)) |
619 | return NAN; |
620 | |
621 | return gps_state->eph; |
622 | } |
623 | |
624 | gps_sat_t *gps_get_sats(appdata_t *appdata) { |
625 | gps_sat_t *retval = NULL; |
626 | gps_state_t *gps_state = appdata->gps_state; |
627 | |
628 | if(gps_state->sats.num) { |
629 | retval = g_new0(gps_sat_t, 1); |
630 | retval->num = gps_state->sats.num; |
631 | |
632 | retval->PRN = g_memdup(gps_state->sats.PRN, |
633 | sizeof(int)*gps_state->sats.num); |
634 | retval->used = g_memdup(gps_state->sats.used, |
635 | sizeof(int)*gps_state->sats.num); |
636 | retval->ss = g_memdup(gps_state->sats.ss, |
637 | sizeof(int)*gps_state->sats.num); |
638 | } |
639 | |
640 | return retval; |
641 | } |
642 | |
643 | |
644 | #endif |