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OEP 1 : AD refactor/unification
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.. contents::
   :local:

Status
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**Discussion**

Branches and Pull requests
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 - https://gist.github.com/danielballan/61fd3448f50027423a54

Abstract
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Merge the two AreaDetector implementations.

Detailed description
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Requirements
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 - support full BlueSky API
 - interact with filestore (may be super-ceded by FS integration at c-level)
 - provide access to all PVs and plugins on the EPICS layer area
   detector
   - set up AD pipelines
   - frame squashing
 - be able to change at run-time what is inserted into the result of
   ``read`` (ex, just return ROI values without saving full data)
 - deal with dark-frames
 - 'frequency' attribute to set acquire time

Implementation
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Backward compatibility
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None, break all the things

Alternatives
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Status quo