Re: [RFC PATCH 0/4] Add some new camera controls

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Hi,

On Thursday 29 December 2011 07:15:46 HeungJun, Kim wrote:
> On Wednesday, December 28, 2011 11:01 PM Laurent Pinchart wrote:
> > On Wednesday 28 December 2011 07:23:44 HeungJun, Kim wrote:
> > > Hi everyone,
> > > 
> > > This RFC patch series include new 4 controls ID for digital camera.
> > > I about to suggest these controls by the necessity enabling the M-5MOLS
> > > sensor's function, and I hope to discuss this in here.
> > 
> > Thanks for the patches.
> > 
> > The new controls introduced by these patches are very high level. Should
> > they be put in their own class ? I also think we should specify how
> > those high- level controls interact with low-level controls, otherwise
> > applications will likely get very confused.
> 
> I did not consider yet, but I think it's first to define about what
> low-/high- is. I think this is not high- level controls. And, honestly, I
> don't understand it's really important to categorize low-/high-, or not.
> 
> IMHO, The importance is the just complexity of interacting with each
> modules. If this means the level of low-/high-, I can understand this.
> But I'm wrong, please explain this. :)

Low level controls are usually handled in hardware and pretty much self-
contained. High level controls are usually software algorithms (possibly 
running on the sensor itself) that modify low level controls behind the scene.

If a sensor exposes both an exposure time control and a scene mode control 
that modifies exposure time handling, documentation of the scene mode control 
must explain how the two interacts and what applications can and can't do.

> There is some different story, I just got the N900 some days ago :).
> The purpose is just understanding Nokia and TI OMAP camera architecture
> well. Probably, it helps for me to talk more easily, and I'll be able to
> speak more well
> with omap workers - you and Sakari.

-- 
Regards,

Laurent Pinchart
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