don't consider cng packets for rtp auto-adjust

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15240 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_rtp.c

@@ -1889,7 +1889,8 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 			rtp_flush_read_buffer(rtp_session, SWITCH_RTP_FLUSH_ONCE);
 		}
 
-		if (bytes && switch_test_flag(rtp_session, SWITCH_RTP_FLAG_AUTOADJ) && switch_sockaddr_get_port(rtp_session->from_addr)) {
+		if (bytes && !(rtp_session->recv_msg.header.pt == rtp_session->cng_pt || rtp_session->recv_msg.header.pt == 13) &&
+			switch_test_flag(rtp_session, SWITCH_RTP_FLAG_AUTOADJ) && switch_sockaddr_get_port(rtp_session->from_addr)) {
 			if (++rtp_session->autoadj_tally >= 10) {
 				const char *tx_host;
 				const char *old_host;