Here are the data structures with brief descriptions:

Cpa_buffer_attr	Playback and record buffer metrics
Cpa_card_info	Stores information about cards
Cpa_card_port_info	Stores information about a specific port of a card
Cpa_card_profile_info
Cpa_card_profile_info2	Stores information about a specific profile of a card
Cpa_channel_map	A channel map which can be used to attach labels to specific channels of a stream
Cpa_client_info	Stores information about clients
Cpa_cvolume	A structure encapsulating a per-channel volume
Cpa_ext_device_manager_info	Stores information about one device in the device database that is maintained by module-device-manager
Cpa_ext_device_manager_role_priority_info
Cpa_ext_device_restore_info	Stores information about one device in the device database that is maintained by module-device-manager
Cpa_ext_stream_restore_info	Stores information about one entry in the stream database that is maintained by module-stream-restore
Cpa_format_info	Represents the format of data provided in a stream or processed by a sink
Cpa_mainloop_api	An abstract mainloop API vtable
Cpa_module_info	Stores information about modules
Cpa_sample_info	Stores information about sample cache entries
Cpa_sample_spec	A sample format and attribute specification
Cpa_server_info	Server information
Cpa_simple
Cpa_sink_info	Stores information about sinks
Cpa_sink_input_info	Stores information about sink inputs
Cpa_sink_port_info	Stores information about a specific port of a sink
Cpa_source_info	Stores information about sources
Cpa_source_output_info	Stores information about source outputs
Cpa_source_port_info	Stores information about a specific port of a source
Cpa_spawn_api	A structure for the spawn api
Cpa_stat_info	Memory block statistics
Cpa_timing_info	A structure for all kinds of timing information of a stream