Here are the data structures with brief descriptions:

_jack_latency_range
_jack_midi_event
_jack_session_event
jack_description_t
jack_position_t
jack_property_t
jack_ringbuffer_data_t
jack_ringbuffer_t
jack_session_command_t
jack_transport_info_t
jackctl_parameter_value	Type for parameter value
port_pair_t