GPStracker/soft/autopause.c

/*
 * Auto-pause detection: shared between the firmware and gps-test-tool (see
 * autopause_wrapper.c), since it directly gates what ends up in
 * System.distance/elevation_gain/elevation_loss (excluded while paused) and
 * is a major part of what those tools' output actually looks like.
 */
#ifdef PC_BUILD
#include "../gps-test-tool/main.h"
#else
#include "main.h"
#endif

struct auto_pause_s auto_pause;

static void auto_unpause(void) {
	if (!System.tracking_auto_paused)
		return;
	System.tracking_auto_paused = 0;
	log_pause_event(0);
	beep(50, 4);
}

static void auto_pause_activate(void) {
	System.tracking_auto_paused = 1;
	log_pause_event(1);
	beep(50, 3);
}

void auto_pause_process(void) {
	if (System.tracking_paused || !get_flag(CONFFLAG_AUTO_PAUSE)) { /* remove auto-pause */
		System.tracking_auto_paused = 0;
		auto_pause.prev_distance = System.distance;
		auto_pause.point_counter = 0;
		auto_pause.speed_counter = 0;
		return;
	}
	if (System.speed >= System.conf.auto_pause_speed) { /* unpause when set speed is exceeded for 3 consecutive measurements */
		if (++auto_pause.speed_counter >= 3) {
			auto_pause.point_counter = 0;
			auto_pause.speed_counter = 0;
			auto_unpause();
			return;
		}
	} else {
		auto_pause.speed_counter = 0;
	}
	if (++auto_pause.point_counter < System.conf.auto_pause_time)
		return;
	auto_pause.point_counter = 0;
	if ((System.distance - auto_pause.prev_distance)/100 > System.conf.auto_pause_dist) {
		if (System.tracking_auto_paused)
			auto_unpause(); /* unpause when distance exceeded */
	} else {
		if (!System.tracking_auto_paused)
			auto_pause_activate(); /* pause otherwise */
	}
	auto_pause.prev_distance = System.distance;
}