Commit updated Javascript packages
This commit is contained in:
Owncast
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@startuml
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header DashPlaylistLoader sequences
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title DashPlaylistLoader sequences: Master Manifest with Alternate Audio
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Participant "MasterPlaylistController" as MPC #red
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Participant "MasterDashPlaylistLoader" as MPL #blue
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Participant "mainSegmentLoader" as SL #blue
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Participant "AudioDashPlaylistLoader" as APL #green
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Participant "audioSegmentLoader" as ASL #green
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Participant "external server" as ext #brown
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Participant "mpdParser" as parser #orange
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Participant "mediaGroups" as MG #purple
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Participant Tech #lightblue
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== Initialization ==
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MPC -> MPL : construct MasterPlaylistLoader
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MPC -> MPL: load()
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== Requesting Master Manifest ==
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MPL -> MPL : start()
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MPL -> ext: xhr request for master manifest
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ext -> MPL : response with master manifest
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MPL -> parser: parse manifest
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parser -> MPL: object representing manifest
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note over MPL #lightblue: trigger 'loadedplaylist'
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== Requesting Video Manifest ==
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note over MPL #lightblue: handling loadedplaylist
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MPL -> MPL: media(x)
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alt if no sidx
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note over MPL #lightgray: zero delay to fake network request
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else if sidx
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break
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MPL -> ext: request sidx
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end
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end
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note over MPL #lightblue: trigger 'loadedmetadata' on master loader [T1]
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note over MPL #lightblue: handling 'loadedmetadata'
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opt vod and preload !== 'none'
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MPL -> SL: playlist()
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MPL -> SL: load()
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end
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== Initializing Media Groups, Choosing Active Tracks ==
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MPL -> MG: setupMediaGroups()
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MG -> MG: initialize()
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== Initializing Alternate Audio Loader ==
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MG -> APL: create child playlist loader for alt audio
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MG -> MG: activeGroup and audio variant selected
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MG -> MG: enable activeTrack, onTrackChanged()
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MG -> ASL: reset audio segment loader
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== Requesting Alternate Audio Manifest ==
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MG -> MG: startLoaders()
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MG -> APL: load()
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APL -> APL: start()
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APL -> APL: zero delay to fake network request
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break finish pending tasks
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MG -> Tech: add audioTrack
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MPL -> MPC: setupSourceBuffers_()
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MPL -> MPC: setupFirstPlay()
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loop mainSegmentLoader.monitorBufferTick_()
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SL -> ext: requests media segments
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ext -> SL: response with media segment bytes
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end
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end
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APL -> APL: zero delay over
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APL -> APL: media(x)
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alt if no sidx
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note over APL #lightgray: zero delay to fake network request
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else if sidx
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break
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MPL -> ext: request sidx
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end
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end
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== Requesting Alternate Audio Segments ==
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note over APL #lightblue: trigger 'loadedplaylist'
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note over APL #lightblue: handling 'loadedplaylist'
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APL -> ASL: playlist()
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note over ASL #lightblue: trigger 'loadedmetadata' [T2]
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note over APL #lightblue: handling 'loadedmetadata'
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APL -> ASL: playlist()
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APL -> ASL: load()
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loop audioSegmentLoader.monitorBufferTick_()
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ASL -> ext: requests media segments
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ext -> ASL: response with media segment bytes
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end
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@enduml
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#title: DASH Playlist Loader States
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#arrowSize: 0.5
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#bendSize: 1
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#direction: down
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#gutter: 10
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#edgeMargin: 1
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#edges: rounded
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#fillArrows: false
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#font: Arial
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#fontSize: 10
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#leading: 1
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#lineWidth: 2
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#padding: 20
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#spacing: 50
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#stroke: #33322E
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#zoom: 1
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#.label: align=center visual=none italic
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[HAVE_NOTHING] load()-> [HAVE_MASTER]
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[HAVE_MASTER] media()-> [HAVE_METADATA]
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@startuml
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header PlaylistLoader sequences
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title PlaylistLoader sequences: Master Manifest and Alternate Audio
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Participant "MasterPlaylistController" as MPC #red
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Participant "MasterPlaylistLoader" as MPL #blue
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Participant "mainSegmentLoader" as SL #blue
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Participant "AudioPlaylistLoader" as APL #green
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Participant "audioSegmentLoader" as ASL #green
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Participant "external server" as ext #brown
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Participant "m3u8Parser" as parser #orange
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Participant "mediaGroups" as MG #purple
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Participant Tech #lightblue
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== Initialization ==
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group MasterPlaylistController.constructor()
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MPC -> MPL : setting up MasterPlaylistLoader
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note left #lightyellow
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sets up mediaupdatetimeout
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handler for live playlist staleness
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end note
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note over MPL #lightgray: state = 'HAVE_NOTHING'
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MPC -> MPL: load()
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end
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group MasterPlaylistLoader.load()
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MPL -> MPL : start()
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note left #lightyellow: not started yet
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== Requesting Master Manifest ==
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group start()
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note over MPL #lightgray: started = true
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MPL -> ext: xhr request for master manifest
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ext -> MPL : response with master manifest
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MPL -> parser: parse master manifest
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parser -> MPL: object representing manifest
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MPL -> MPL: set loader's master playlist
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note over MPL #lightgray: state = 'HAVE_MASTER'
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note over MPL #lightblue: trigger 'loadedplaylist' on master loader
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== Requesting Video Manifest ==
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group 'loadedplaylist' handler
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note over MPL #lightblue: handling loadedplaylist
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MPL -> MPL : media()
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note left #lightgray: select initial (video) playlist
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note over MPL #lightyellow: state = 'SWITCHING_MEDIA'
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group media()
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MPL -> ext : request child manifest
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ext -> MPL: child manifest returned
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MPL -> MPL: haveMetadata()
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note over MPL #lightyellow: state = 'HAVE_METADATA'
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group haveMetadata()
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MPL -> parser: parse child manifest
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parser -> MPL: object representing the child manifest
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note over MPL #lightyellow
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update master and media playlists
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end note
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opt live
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MPL -> MPL: setup mediaupdatetimeout
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end
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note over MPL #lightblue
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trigger 'loadedplaylist' on master loader.
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This does not end up requesting segments
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at this point.
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end note
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group MasterPlaylistLoader 'loadedplaylist' handler
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MPL -> MPL : setup durationchange handler
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end
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end
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== Requesting Video Segments ==
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note over MPL #lightblue: trigger 'loadedmetadata'
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group 'loadedmetadata' handler
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note over MPL #lightblue: handling 'loadedmetadata'
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opt vod and preload !== 'none'
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MPL -> SL: playlist()
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note over SL #lightyellow: updates playlist
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MPL -> SL: load()
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note right #lightgray
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This does nothing as mimeTypes
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have not been set yet.
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end note
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end
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MPL -> MG: setupMediaGroups()
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== Initializing Media Groups, Choosing Active Tracks ==
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group MediaGroups.setupMediaGroups()
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group initialize()
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MG -> APL: create child playlist loader for alt audio
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note over APL #lightyellow: state = 'HAVE_NOTHING'
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note left #lightgray
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setup 'loadedmetadata' and 'loadedplaylist' listeners
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on child alt audio playlist loader
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end note
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MG -> Tech: add audioTracks
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end
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MG -> MG: activeGroup and audio variant selected
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MG -> MG: enable activeTrack, onTrackChanged()
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note left #lightgray
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There is no activePlaylistLoader at this point,
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but there is an audio playlistLoader
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end note
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group onTrackChanged()
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MG -> SL: reset mainSegmentLoader
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note left #lightgray: Clears buffer, aborts all inflight requests
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== Requesting Alternate Audio Manifest ==
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MG -> MG: startLoaders()
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group startLoaders()
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note over MG #lightyellow
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activePlaylistLoader = AudioPlaylistLoader
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end note
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MG -> APL: load()
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end
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group AudioPlaylistLoader.load()
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APL -> APL: start()
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group alt start()
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note over APL #lightyellow: started = true
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APL -> ext: request alt audio media manifest
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break MasterPlaylistLoader 'loadedmetadata' handler
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MPL -> MPC: setupSourceBuffers()
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note left #lightgray
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This will set mimeType.
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Segments can be loaded from now on.
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end note
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MPL -> MPC: setupFirstPlay()
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note left #lightgray
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Immediate exit since the player
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is paused
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end note
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end
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ext -> APL: responds with child manifest
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APL -> parser: parse child manifest
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parser -> APL: object representing child manifest returned
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note over APL #lightyellow: state = 'HAVE_MASTER'
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note left #lightgray: Infer a master playlist
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APL -> APL: haveMetadata()
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note over APL #lightyellow: state = 'HAVE_METADATA'
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group haveMetadata()
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APL -> parser: parsing the child manifest again
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parser -> APL: returning object representing child manifest
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note over APL #lightyellow
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update master and media references
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end note
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== Requesting Alternate Audio Segments ==
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note over APL #lightblue: trigger 'loadedplaylist'
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group 'loadedplaylist' handler
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note over APL #lightblue: handling 'loadedplaylist'
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APL -> ASL: playlist()
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note over ASL #lightyellow: set playlist
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end
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end
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note over APL #lightblue: trigger 'loadedmetadata'
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group 'loadedmetadata' handler
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note over APL #lightblue: handling 'loadedmetadata'
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APL -> ASL: playlist()
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APL -> ASL: load()
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loop audioSegmentLoader.load()
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ASL -> ext: requests media segments
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ext -> ASL: response with media segment bytes
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end
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end
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end
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end
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end
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end
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end
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end
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end
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end
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@enduml
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@startuml
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header PlaylistLoader sequences
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title PlaylistLoader sequences: Master Manifest and Alternate Audio
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Participant "MasterPlaylistController" as MPC #red
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Participant "MasterPlaylistLoader" as MPL #blue
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Participant "mainSegmentLoader" as SL #blue
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Participant "AudioPlaylistLoader" as APL #green
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Participant "audioSegmentLoader" as ASL #green
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Participant "external server" as ext #brown
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Participant "m3u8Parser" as parser #orange
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Participant "mediaGroups" as MG #purple
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Participant Tech #lightblue
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== Initialization ==
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MPC -> MPL : construct MasterPlaylistLoader
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MPC -> MPL: load()
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MPL -> MPL : start()
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== Requesting Master Manifest ==
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MPL -> ext: xhr request for master manifest
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ext -> MPL : response with master manifest
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MPL -> parser: parse master manifest
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parser -> MPL: object representing manifest
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note over MPL #lightblue: trigger 'loadedplaylist'
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== Requesting Video Manifest ==
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note over MPL #lightblue: handling loadedplaylist
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MPL -> MPL : media()
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MPL -> ext : request child manifest
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ext -> MPL: child manifest returned
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MPL -> parser: parse child manifest
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parser -> MPL: object representing the child manifest
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note over MPL #lightblue: trigger 'loadedplaylist'
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note over MPL #lightblue: handleing 'loadedplaylist'
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MPL -> SL: playlist()
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MPL -> SL: load()
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== Requesting Video Segments ==
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note over MPL #lightblue: trigger 'loadedmetadata'
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note over MPL #lightblue: handling 'loadedmetadata'
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opt vod and preload !== 'none'
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MPL -> SL: playlist()
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MPL -> SL: load()
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end
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MPL -> MG: setupMediaGroups()
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== Initializing Media Groups, Choosing Active Tracks ==
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MG -> APL: create child playlist loader for alt audio
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MG -> MG: activeGroup and audio variant selected
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MG -> MG: enable activeTrack, onTrackChanged()
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MG -> SL: reset mainSegmentLoader
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== Requesting Alternate Audio Manifest ==
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MG -> MG: startLoaders()
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MG -> APL: load()
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APL -> APL: start()
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APL -> ext: request alt audio media manifest
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break finish pending tasks
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MG -> Tech: add audioTracks
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MPL -> MPC: setupSourceBuffers()
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MPL -> MPC: setupFirstPlay()
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loop on monitorBufferTick
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SL -> ext: requests media segments
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ext -> SL: response with media segment bytes
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end
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end
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ext -> APL: responds with child manifest
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APL -> parser: parse child manifest
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parser -> APL: object representing child manifest returned
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== Requesting Alternate Audio Segments ==
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note over APL #lightblue: trigger 'loadedplaylist'
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note over APL #lightblue: handling 'loadedplaylist'
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APL -> ASL: playlist()
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note over APL #lightblue: trigger 'loadedmetadata'
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note over APL #lightblue: handling 'loadedmetadata'
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APL -> ASL: playlist()
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APL -> ASL: load()
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loop audioSegmentLoader.load()
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ASL -> ext: requests media segments
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ext -> ASL: response with media segment bytes
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end
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@enduml
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||||
Generated
Vendored
+25
@@ -0,0 +1,25 @@
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#title: Playlist Loader States
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#arrowSize: 0.5
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#bendSize: 1
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#direction: down
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#gutter: 10
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#edgeMargin: 1
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#edges: rounded
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#fillArrows: false
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#font: Arial
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#fontSize: 10
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#leading: 1
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#lineWidth: 2
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#padding: 20
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#spacing: 50
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#stroke: #33322E
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#zoom: 1
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#.label: align=center visual=none italic
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[HAVE_NOTHING] load()-> [HAVE_MASTER]
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[HAVE_MASTER] media()-> [SWITCHING_MEDIA]
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[SWITCHING_MEDIA] media()/ start()-> [HAVE_METADATA]
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[HAVE_METADATA] <--> [<label> mediaupdatetimeout]
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[<label> mediaupdatetimeout] <--> [HAVE_CURRENT_METADATA]
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