Re: [Openfx-developer] analysis pass ?

[Pierre J. <ja...@re...>]

On 4/20/2011 11:08 PM, Mike Wong wrote:
> Pierre,
>
> Thanks for the info.
>
> As there's no specific callback for this so-called 'analysis' pass, Is it up to the developer when to set "kOfxImageEffectPropInAnalysis" flag as 1 and then carry out computation during for example e.g. kOfxActionInstanceChanged callback?

Actually I was working from memory instead of what the header files actually say and I see it says
that This feature is likely to be deprecated in future releases. So I am not clear.

Right now here we only set param values during interact callback ( like in overlay.cpp example -    
gPropHost->propSetPointer(effectProps, kOfxImageEffectPluginPropOverlayInteractV1, 0,  (void *) overlayMain); in describe action ).  
You can also maybe maintain instance data.



||
>>> Hi there,
>>>
>>> I come across this 'analysis pass' term in the 1.2 documentation but
>> I am not sure what it is referring to exactly as there is not much
>> mentioned in the whole doc.  Does it mean one may set this flag
>> "kOfxImageEffectPropInAnalysis" during rendering and what exactly does
>> it serve?
>>
>> The theory is if you need to write parameter values based on analyzing
>> the image content, some applications don't like you do that
>> at the actual render stage.
>
>
>
>
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