091785c2d4
This reverts commit 65bae31de4103abb7d7b6fd004a8315973d3144a. and reprocessed the wrapping. Note that the automatic wrapping is not perfect, some manual fixing by removing some hunks was required.
75 lines
1.7 KiB
Text
75 lines
1.7 KiB
Text
Design Process : Data Backend
|
|
=============================
|
|
|
|
[grid="all"]
|
|
`------------`-----------------------
|
|
*State* _Final_
|
|
*Date* _2007-06-04_
|
|
*Proposed by* link:ct[]
|
|
-------------------------------------
|
|
|
|
DataBackend
|
|
-----------
|
|
Describe the DataBackend functionality.
|
|
|
|
|
|
Description
|
|
~~~~~~~~~~~
|
|
This just starts as braindump, I will refine it soon:
|
|
|
|
. handle all files lumiera uses at runtime (media, edl, temp data)
|
|
. manage filehandles, lumiera might use more more files than available
|
|
filehandles
|
|
. manage temporary data
|
|
. do caching
|
|
. io will be blocked where the backend tells the core where it can expect the
|
|
data (not read()/write() like)
|
|
. kindof garbage collector
|
|
. do prefetching
|
|
. no/low latency for the core the prefetcher and other things ensure that data
|
|
is available in time
|
|
. translate any input into a format which the lumiera core understands (demux,
|
|
decode)
|
|
. same for encoding to output formats
|
|
. offer a plugin API for encoders/decoders
|
|
. maybe network backend for serving data to distributed rendernodes
|
|
. can do some load control or management (trigger adaptive rendering if system
|
|
is idle etc)
|
|
. pull based arch
|
|
|
|
.Notes:
|
|
* ichthyo wrote also some ideas on
|
|
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]
|
|
|
|
|
|
Tasks
|
|
^^^^^
|
|
|
|
|
|
Pros
|
|
^^^^
|
|
|
|
|
|
Cons
|
|
^^^^
|
|
|
|
|
|
Alternatives
|
|
^^^^^^^^^^^^
|
|
|
|
|
|
Rationale
|
|
~~~~~~~~~
|
|
|
|
|
|
Comments
|
|
--------
|
|
|
|
Sounds fairly complete to me
|
|
-- link:Ichthyostega[] [[DateTime(2007-06-16T23:19:44Z)]]
|
|
|
|
Developement takes place in the repo now
|
|
-- link:ct[] [[DateTime(2007-06-27T16:14:56Z)]]
|
|
|
|
''''
|
|
Back to link:Lumiera/DesignProcess[]
|