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

SequenceDiagramForPlaybackAnHLSStreamErrorFetchingData.wsd

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# Error fetching data
title Sequence Diagram For Playback an HLS stream (Error fetching 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_IDLE
readyState: HAVE_ENOUGH_DATA
end note
 
HigherLayer->MediaPlayer: play()
 
MediaPlayer->HigherLayer: play
MediaPlayer->HigherLayer: playing
 
MediaPlayer->VideoPipeline: Check if there are enough data for playback.
 
alt There are not enough data for playback
 
    note right of MediaPlayer
    networkState: NETWORK_LOADING
    end note
 
    MediaPlayer->HigherLayer: progress
 
    note right of MediaPlayer
    readyState: HAVE_CURRENT_DATA
    end note
 
    MediaPlayer->HigherLayer: waiting
 
    note right of VideoPipeline
    1. Connect successfully to remote server.
    2. Some media data has been received \nbut the connection interrupted or aborted by the user.
    end note
 
    VideoPipeline->MediaPlayer: Error fetching data.
 
    alt Connection interrupted
 
        note right of MediaPlayer
        networkState: NETWORK_IDLE
        error: MEDIA_ERR_NETWORK
        end note
 
        MediaPlayer->HigherLayer: error
 
    else Connection aborted
 
        note right of MediaPlayer
        error: MEDIA_ERR_ABORTED
        end note
 
        MediaPlayer->HigherLayer: error
 
        note right of MediaPlayer
        networkState: NETWORK_IDLE
        end note
 
    end 
 
 
else There are enough data to playback
 
    note right of MediaPlayer
    No need to perform any particular action.
    end note
 
    VideoPipeline->MediaPlayer: No need to return any data.
    
end

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