Sequence Diagram For Loading an HLS stream (Error decoding data) for http://www.websequencediagrams.com/

SequenceDiagramForLoadingAnHLSStreamErrorDecodingData.wsd

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# Error decoding data
title Sequence Diagram For Loading an HLS stream (Error decoding data)
 
participant "Higher Layer (HTML page, JS)" as HigherLayer
participant "HTMLMediaElement" as MediaPlayer
participant "Video pipeline(Remote server, Demux, Decoder)" as VideoPipeline
 
note right of MediaPlayer
networkState: NETWORK_EMPTY
readyState: HAVE_NOTHING
end note
 
HigherLayer->MediaPlayer: load()
 
note right of MediaPlayer
networkState: NETWORK_NO_SOURCE
end note
 
MediaPlayer->VideoPipeline: Can you fetch the media data from the remote server?
 
note right of MediaPlayer
networkState: NETWORK_LOADING
end note
 
MediaPlayer->HigherLayer: loadstart
 
MediaPlayer->HigherLayer: progress
 
note right of VideoPipeline
# For HLS specification see http://tools.ietf.org/html/draft-pantos-http-live-streaming-11
1. Connect successfully to remote server.
2. Some media data has been received.
3. Error decoding data.
end note
 
note right of MediaPlayer
readyState >= HAVE_NOTHING
The readyState can be larger than HAVE_NOTHING \nbecause some data might have been downloaded.
end note
 
VideoPipeline->MediaPlayer: Error decoding data.
 
note right of MediaPlayer
error: MEDIA_ERR_DECODE
end note
 
MediaPlayer->HigherLayer: error
 
 
alt readyState: HAVE_NOTHING
 
    note right of MediaPlayer
    networkState: NETWORK_EMPTY
    end note
 
    MediaPlayer->HigherLayer: emptied
 
else readyState > HAVE_NOTHING
 
    note right of MediaPlayer
    networkState: NETWORK_IDLE
    end note
    
end

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