typedef struct sout_stream_sys_t sout_stream_sys_t;
typedef struct config_chain_t config_chain_t;
-typedef struct sap_session_t sap_session_t;
-typedef struct sap_address_t sap_address_t;
typedef struct session_descriptor_t session_descriptor_t;
typedef struct announce_method_t announce_method_t;
typedef struct announce_handler_t announce_handler_t;