add read_frame_callback to gentones

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15459 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_ivr_play_say.c

@@ -808,6 +808,13 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_gentones(switch_core_session_t *sessi
 			break;
 		}
 
+
+		if (args && (args->read_frame_callback)) {
+			if (args->read_frame_callback(session, read_frame, args->user_data) != SWITCH_STATUS_SUCCESS) {
+				break;
+			}
+		}
+
 		switch_ivr_parse_all_events(session);
 
 		if (args && (args->input_callback || args->buf || args->buflen)) {