75 lines
1.8 KiB
Text
75 lines
1.8 KiB
Text
Design Process : Data Backend
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=============================
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[grid="all"]
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`------------`-----------------------
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*State* _Final_
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*Date* _2007-06-04_
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*Proposed by* link:ct[]
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-------------------------------------
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DataBackend
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-----------
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Describe the DataBackend functionality.
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Description
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~~~~~~~~~~~
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This just starts as braindump, I will refine it soon:
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. handle all files lumiera uses at runtime (media, edl, temp data)
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. manage filehandles, lumiera might use more more files than available
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filehandles
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. manage temporary data
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. do caching
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. io will be blocked where the backend tells the core where it can expect the
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data (not read()/write() like)
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. kindof garbage collector
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. do prefetching
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. no/low latency for the core the prefetcher and other things ensure that data
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is available in time
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. translate any input into a format which the lumiera core understands (demux,
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decode)
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. same for encoding to output formats
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. offer a plugin API for encoders/decoders
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. maybe network backend for serving data to distributed rendernodes
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. can do some load control or management (trigger adaptive rendering if system
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is idle etc)
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. pull based arch
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.Notes:
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* ichthyo wrote also some ideas on
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http://www.pipapo.org/pipawiki/Cinelerra/Developers/ichthyo/Cinelerra3/Architecture[Architecture] and a sketch/draft about http://www.pipapo.org/pipawiki/Cinelerra/Developers/ichthyo/Possibilities_at_hand[things possible in the middle layer]
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Tasks
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^^^^^
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Pros
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^^^^
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Cons
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^^^^
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Alternatives
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^^^^^^^^^^^^
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Rationale
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~~~~~~~~~
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Comments
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--------
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Sounds fairly complete to me
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-- link:Ichthyostega[] [[DateTime(2007-06-16T23:19:44Z)]]
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Developement takes place in the repo now
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-- link:ct[] [[DateTime(2007-06-27T16:14:56Z)]]
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''''
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Back to link:/documentation/devel/rfc.html[Lumiera Design Process overview]
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