Sequence Diagram For Loading an HLS stream (Error fetching data from remote server) for http://www.websequencediagrams.com/

SequenceDiagramForLoadingAnHLSStreamErrorFetchingDataFromRemoteServer.wsd

<div class="wsd" wsd_style="vs2010"><pre>

# Errors fetching data from remote server
title Sequence Diagram For Loading an HLS stream (Error fetching data from remote server)
 
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 but the connection interrupted or aborted by the user.
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 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
 
 
    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
 
end

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