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@startuml

autonumber

box "Container" #LightGreen
participant Application
participant rialtoGstreamer
participant rialtoClient
end box

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

== Decryption ==
GStreamer_server   ->  rialtoServer:      decrypt(buffer)

rialtoServer	   ->  GStreamer_server:  MediaKeyErrorStatus::Fail
GStreamer_server   ->  GStreamer_server:  GST_BASE_TRANSFORM_FLOW_DROPPED 

note over GStreamer_server
Frame is dropped but playback is unaffected.
end note 

GStreamer_server   ->  rialtoServer:      GST_MESSAGE_WARNING(src, GST_STREAM_ERROR_DECRYPT)

rialtoServer       -/  rialtoClient:      notifyPlaybackError(MediaSourceType, PlaybackError::DECRYPTION)
rialtoClient       -/  rialtoGstreamer:   notifyPlaybackError(MediaSourceType, PlaybackError::DECRYPTION)
 
note over GStreamer_serverrialtoGstreamer
Pipeline moves to error state an cannot recover.
end note   
rialtoGstreamer    -/  Application:       GST_MESSAGE_ERROR(sink, GST_STREAM_ERROR_DECRYPT)

@enduml