-
-static int32_t prev_lat, prev_lon;
-static int16_t prev_alt;
-static uint8_t has_prev, unmoving;
-
-#define GPS_SPARSE_UNMOVING_REPORTS 10
-#define GPS_SPARSE_UNMOVING_GROUND 10
-#define GPS_SPARSE_UNMOVING_AIR 10
-
-uint8_t
-ao_log_gps_should_log(int32_t lat, int32_t lon, int16_t alt)
-{
- if (has_prev && ao_log_running) {
- uint32_t h = ao_distance(prev_lat, prev_lon, lat, lon);
- uint16_t v = alt > prev_alt ? (alt - prev_alt) : (prev_alt - alt);
-
- if (h < GPS_SPARSE_UNMOVING_GROUND && v < GPS_SPARSE_UNMOVING_AIR) {
- if (unmoving < GPS_SPARSE_UNMOVING_REPORTS)
- ++unmoving;
- } else
- unmoving = 0;
- } else
- unmoving = 0;
-
- prev_lat = lat;
- prev_lon = lon;
- prev_alt = alt;
- has_prev = 1;
- return unmoving >= GPS_SPARSE_UNMOVING_REPORTS;
-}
-