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@startuml

autonumber

box "Platform" #LightGreen
participant rialtoClient
end box

box "Platform" #LightBlue
participant rialtoServer
participant GStreamer_server
participant Ocdm
end box

GstreamerGStreamer_server   ->  rialtoServer:      decrypt(buffer)

rialtoServer	   ->  GStreamer_server:  gst_buffer_get_protection_meta(buffer)
 
opt Protection Meta exists (Frame encrypted)
 
rialtoServer       ->  rialtoServer:      Extract frame's metadata

opt media_keys.key_system == "com.netflix.playready"
rialtoServer       ->  Ocdm:              opencdm_select_key_id(ocdm_session, kid)
end

rialtoServer       ->  Ocdm:              opencdm_gstreamer_session_decrypt(ocdm_session, gst_buffer, subsample_info, iv, key, init_with_last_15)
end 

@enduml