Sequence Diagram For Loading a DVB stream (Error on demux or dcr) for http://www.websequencediagrams.com

SequenceDiagramForLoadingADVBStreamErrorOnDemuxOrDcr.wsd

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# Error on demux or dcr
title Sequence Diagram For Loading a DVB stream (Error on demux or dcr)
 
participant "Higher Layer (HTML page, JS)" as HigherLayer
participant "HTMLMediaElement" as MediaPlayer
participant "Video pipeline(Tuner, Demod, 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
 
note right of MediaPlayer
networkState: NETWORK_LOADING
end note
 
MediaPlayer->HigherLayer: loadstart
 
MediaPlayer->VideoPipeline: Lock to the frequency specified in the DVB url.
 
MediaPlayer-->HigherLayer: progress
 
note right of VideoPipeline
Tuner tslock to the given frequency. Everything it's ok with no problem.
end note
 
VideoPipeline->MediaPlayer: Ok tslocked to the frequency with no problem.
 
MediaPlayer->VideoPipeline: Can you use the demux and decoder to get the DVB stream?
 
MediaPlayer-->HigherLayer: progress
 
note right of VideoPipeline
1. Media Player uses demux and dcr to create the stream. There was \nan error on demux or dcr. Could not generate the stream, or
2. Error retrieving PSI tables.
end note
 
VideoPipeline->MediaPlayer: Error generating the stream or retrieving PSI tables.
 
 
note right of MediaPlayer
error: MEDIA_ERR_DECODE
end note
 
note right of MediaPlayer
On Webkit the errors are included in the networkState.
networkState: DecodeError
end note
 
MediaPlayer->HigherLayer: error
 
note right of MediaPlayer
networkState: NETWORK_EMPTY
end note
 
MediaPlayer->HigherLayer: emptied
 
 
note right of MediaPlayer
Abort the load.
end note

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