interface acquired from component

title Interface acquired from Component
participant "C2Client" as Client
participant "C2ComponentStore" as Store
participant "C2ComponentInterface" as Intf
participant "C2Component" as Comp
participant "KernelDriver" as Driver

Client -> +Store : createComponent("qcom.avc.decoder")
Store -> Comp : create
Comp -> Driver : open
Comp -> Intf : create
Store --> -Client :

Client -> Comp : intf()
Comp --> Client : return interface-handle

note left of Client : enumerate supported params
Client -> Intf : getSuppotedParams
Intf --> Client : list of supported params
Client -> Intf : getSuppotedValues
Intf --> Client : list of supported values

note left of Client : query parameters
Client -> +Intf : query_nb()
note right of Intf : query is not\nrouted to component
Intf --> -Client : populate heap and stack params

note left of Client : configure component
Client -> +Intf : config_nb()
Intf -> Comp : config()
Comp -> Driver : set-controls
Driver --> Comp : return failures (unlikely)
Comp --> Intf :
Intf --> Intf : update C2SettingResult
Intf --> -Client :

note left of Client : commit_sm()
Client -> +Intf : commit_sm()
Intf -> Comp : commit
Comp -> Driver : reserve
Intf --> -Client :

Client -> Comp : start()