int tts_dbus_request_add_text(unsigned int uid, const char* text, const char* lang, int vctype, int speed, int uttid, const char* credential);
int tts_dbus_request_play(unsigned int uid, const char* credential);
int tts_dbus_request_add_text(unsigned int uid, const char* text, const char* lang, int vctype, int speed, int uttid, const char* credential);
int tts_dbus_request_play(unsigned int uid, const char* credential);