app_queue: periodic announcement configurable start time.

This newly introduced periodic-announce-startdelay makes it possible to
configure the initial start delay of the first periodic announcement
after which periodic-announce-frequency takes over.

UserNote: Introduce a new queue configuration option called
'periodic-announce-startdelay' which will vary the normal (historic)
behavior of starting the periodic announcement cycle at
periodic-announce-frequency seconds after entering the queue to start
the periodic announcement cycle at period-announce-startdelay seconds
after joining the queue.  The default behavior if this config option is
not set remains unchanged.

Signed-off-by: Jaco Kroon <jaco@uls.co.za>

apps/app_queue.c

@@ -1862,6 +1862,7 @@ struct call_queue {
 	int announcepositionlimit;          /*!< How many positions we announce? */
 	int announcefrequency;              /*!< How often to announce their position */
 	int minannouncefrequency;           /*!< The minimum number of seconds between position announcements (def. 15) */
+	int periodicannouncestartdelay;     /*!< How long into the queue should the periodic accouncement start */
 	int periodicannouncefrequency;      /*!< How often to play periodic announcement */
 	int numperiodicannounce;            /*!< The number of periodic announcements configured */
 	int randomperiodicannounce;         /*!< Are periodic announcments randomly chosen */
@@ -2995,6 +2996,7 @@ static void init_queue(struct call_queue *q)
 	q->weight = 0;
 	q->timeoutrestart = 0;
 	q->periodicannouncefrequency = 0;
+	q->periodicannouncestartdelay = -1;
 	q->randomperiodicannounce = 0;
 	q->numperiodicannounce = 0;
 	q->relativeperiodicannounce = 0;
@@ -3453,6 +3455,8 @@ static void queue_set_param(struct call_queue *q, const char *param, const char
 			ast_str_set(&q->sound_periodicannounce[0], 0, "%s", val);
 			q->numperiodicannounce = 1;
 		}
+	} else if (!strcasecmp(param, "periodic-announce-startdelay")) {
+		q->periodicannouncestartdelay = atoi(val);
 	} else if (!strcasecmp(param, "periodic-announce-frequency")) {
 		q->periodicannouncefrequency = atoi(val);
 	} else if (!strcasecmp(param, "relative-periodic-announce")) {
@@ -8743,6 +8747,11 @@ static int queue_exec(struct ast_channel *chan, const char *data)
 	}
 	ast_assert(qe.parent != NULL);
 
+	if (qe.parent->periodicannouncestartdelay >= 0) {
+		qe.last_periodic_announce_time += qe.parent->periodicannouncestartdelay;
+		qe.last_periodic_announce_time -= qe.parent->periodicannouncefrequency;
+	}
+
 	ast_queue_log(args.queuename, ast_channel_uniqueid(chan), "NONE", "ENTERQUEUE", "%s|%s|%d",
 		S_OR(args.url, ""),
 		S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, ""),

configs/samples/queues.conf.sample

@@ -299,6 +299,13 @@ monitor-type = MixMonitor
 ;
 ;periodic-announce-frequency=60
 ;
+; If given indicates the number of seconds after entering the queue the first
+; periodic announcement should be played.  The default (and historic) behavior
+; is to play the first periodic announcement at periodic-announce-frequency
+; seconds after entering the queue.
+;
+;periodic-announce-startdelay=10
+;
 ; Should the periodic announcements be played in a random order? Default is no.
 ;
 ;random-periodic-announce=no