[Pythonmac-SIG] [OT] Quicktime/Buffer API

[michael ferraro]

The data is a simple unsigned char *
so thanks for the leads.


M


On Oct 26, 2005, at 1:02 PM, Chris Barker wrote:

> michael ferraro wrote:
>
>> I need to eliminate any copies of a PixMaps used
>> by  a Quicktime Movie that I am texture mapping
>> with OpenGL.  I have built an extension in "C" but
>> I am a bit unclear as to how to "circumvent" the the
>> copy done by Py_BuildValue.
>>
>> I was wondering if any one has any experience
>> or advice on how to approach this. Is the Buffer
>> Object/API the right way to go? or is there
>> another approach
>>
>
> What form is the data in in your c code? A pointer to simple C array?
>
> If so, the buffer object could work, or you could build a NumPy  
> array. I
> think PyOpenGL can work with them natively. If you want to got hat
> route, the situation is pretty confusing as there are now three (count
> 'em three!) implementations, Numeric, numarray, and the new  
> SciPy.base.
> I'd go with whatever PyOpenGL supports, or, if you have the option,  
> and
> can tolerate beta code, Scipy.base. With any luck it will be the next
> generation NumPy.
>
> http://numeric.scipy.org/
>
> SciPy.base has also introduced  a new "array protocol/interface",  
> which
> I think has been back ported to both Numeric and numarray:
>
> http://numeric.scipy.org/array_interface.html
>
> This was designed with just this kind of use in mind.
>
> -Chris
>
>
>
> -- 
> Christopher Barker, Ph.D.
> Oceanographer
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