1 files changed, 109 insertions, 0 deletions
diff --git a/package/libtapi/src/dialdetector.h b/package/libtapi/src/dialdetector.h
new file mode 100644
index 000000000..ff91b37aa
--- /dev/null
+++ b/package/libtapi/src/dialdetector.h
@@ -0,0 +1,109 @@
+#include <linux/input.h>
+#include <sys/epoll.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "events.h"
+#include "timerfd.h"
+
+#include "tapi-port.h"
+#include "dialdetector.h"
+
+static const struct itimerspec dialdetector_timeout = {
+	.it_value.tv_sec = 3,
+};
+
+static void dialdetector_note_digit(struct dialdetector *d, unsigned char digit)
+{
+	printf("note digit: %d\n", d->num_digits);
+	d->digits[d->num_digits] = digit;
+	++d->num_digits;
+}
+
+static void dialdetector_reset(struct dialdetector *d)
+{
+	event_unregister(d->timer_fd);
+	d->num_digits = 0;
+	d->state = DIALDETECTOR_IDLE;
+}
+
+static bool dialdetector_timeout_event(int events, void *data)
+{
+	char num[20];
+	struct dialdetector *dialdetector = data;
+	int i;
+
+	for (i = 0; i < dialdetector->num_digits; ++i) {
+		num[i] = '0' + dialdetector->digits[i];
+	}
+	num[i] = '\0';
+
+	printf("Dialing: %s\n", num);
+	dialdetector->dial_callback(dialdetector->port, dialdetector->num_digits,
+	dialdetector->digits);
+
+	dialdetector_reset(dialdetector);
+
+	return false;
+}
+
+static void dialdetector_port_event(struct tapi_port *port,
+	struct tapi_event *event, void *data)
+{
+	struct dialdetector *d = data;
+
+	printf("port event: %d %d\n", d->state, event->hook.on);
+
+	switch (d->state) {
+	case DIALDETECTOR_IDLE:
+		if (event->type == TAPI_EVENT_TYPE_HOOK && event->hook.on == false) {
+			d->state = DIALDETECTOR_WAIT_FOR_NUMBER;
+			event_register(d->timer_fd, EPOLLIN, &d->timeout_cb);
+			timerfd_settime(d->timer_fd, 0, &dialdetector_timeout, NULL);
+		}
+		break;
+	case DIALDETECTOR_WAIT_FOR_NUMBER:
+	case DIALDETECTOR_WAIT_FOR_NUMBER_TIMEOUT:
+		switch (event->type) {
+		case TAPI_EVENT_TYPE_HOOK:
+			if (event->hook.on == true)
+				dialdetector_reset(d);
+			break;
+		case TAPI_EVENT_TYPE_DTMF:
+			if (d->state == DIALDETECTOR_WAIT_FOR_NUMBER)
+				event_register(d->timer_fd, EPOLLIN, &d->timeout_cb);
+			timerfd_settime(d->timer_fd, 0, &dialdetector_timeout, NULL);
+			d->state = DIALDETECTOR_WAIT_FOR_NUMBER_TIMEOUT;
+			dialdetector_note_digit(d, event->dtmf.code);
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+struct dialdetector *dialdetector_alloc(struct tapi_port *port)
+{
+	struct dialdetector *dialdetector;
+	dialdetector = malloc(sizeof(*dialdetector));
+
+	dialdetector->timer_fd = timerfd_create(CLOCK_MONOTONIC, 0);
+	dialdetector->port = port;
+	dialdetector->num_digits = 0;
+	dialdetector->state = DIALDETECTOR_IDLE;
+
+	dialdetector->timeout_cb.callback = dialdetector_timeout_event;
+	dialdetector->timeout_cb.data = dialdetector;
+
+	dialdetector->port_listener.callback = dialdetector_port_event;
+	dialdetector->port_listener.data = dialdetector;
+
+	tapi_port_register_event(port, &dialdetector->port_listener);
+
+
+	return dialdetector;
+}