jitter buffer sanity checks

src/mod/endpoints/mod_sofia/mod_sofia.c

@@ -1373,6 +1373,9 @@ static switch_status_t sofia_receive_message(switch_core_session_t *session, swi
 					
 					if ((len = atoi(msg->string_arg))) {
 						qlen = len / (tech_pvt->read_impl.microseconds_per_packet / 1000);
+						if (qlen < 1) {
+							qlen = 3;
+						}
 					}
 					
 					if (qlen) {
@@ -1393,6 +1396,9 @@ static switch_status_t sofia_receive_message(switch_core_session_t *session, swi
 				}
 
 				if (qlen) {
+					if (maxqlen < qlen) {
+						maxqlen = qlen * 5;
+					}
 					if (switch_rtp_activate_jitter_buffer(tech_pvt->rtp_session, qlen, maxqlen,
 														  tech_pvt->read_impl.samples_per_packet, 
 														  tech_pvt->read_impl.samples_per_second, max_drift) == SWITCH_STATUS_SUCCESS) {

src/mod/endpoints/mod_sofia/sofia_glue.c

@@ -3196,10 +3196,17 @@ switch_status_t sofia_glue_activate_rtp(private_object_t *tech_pvt, switch_rtp_f
 				
 				qlen = jb_msec / (tech_pvt->read_impl.microseconds_per_packet / 1000);
 
+				if (qlen < 1) {
+					qlen = 3;
+				}
+
 				if (maxlen) {
 					maxqlen = maxlen / (tech_pvt->read_impl.microseconds_per_packet / 1000);
 				}
 
+				if (maxqlen < qlen) {
+					maxqlen = qlen * 5;
+				}
 				if (switch_rtp_activate_jitter_buffer(tech_pvt->rtp_session, qlen, maxqlen,
 													  tech_pvt->read_impl.samples_per_packet, 
 													  tech_pvt->read_impl.samples_per_second, max_drift) == SWITCH_STATUS_SUCCESS) {

src/switch_rtp.c

@@ -1919,6 +1919,14 @@ SWITCH_DECLARE(switch_status_t) switch_rtp_activate_jitter_buffer(switch_rtp_t *
 		return SWITCH_STATUS_FALSE;
 	}
 
+	if (queue_frames < 1) {
+		queue_frames = 3;
+	}
+
+	if (max_queue_frames < queue_frames) {
+		max_queue_frames = queue_frames * 3;
+	}
+
 	READ_INC(rtp_session);
 	if (rtp_session->jb) {
 		stfu_n_resize(rtp_session->jb, queue_frames);