[PD-dev] how to check if buffer is valid...

[Thomas Grill]

Hi Ji-Sun,
as fas as i know "valid" in Max/MSP means that the buffer content is  
not changing at the moment. This has no parallel in PD.
Therefore, the flext method buffer->Valid() will always return true.
As discussed with Ico, buffer->Ok() is the method to check whether a  
buffer is present, although this is currently only meaningful when  
instantiating a buffer.
You'll have to re-update all your buffers used with buffer->Set() in  
CbDsp to keep track of deleted or resized buffer objects - but i'll  
try to make this transparent for the user in the future.

greetings,
Thomas

Am 27.03.2007 um 18:48 schrieb Ji-Sun:

> Hello,
>
> I am a rookie in PD, and currently developing some externals with  
> flext.
>
> In order to check if a buffer is valid in flext, I am using “Valid”  
> function.
>
> The “Valid” function uses a Max-dependent structure to check the  
> buffer’s validation for MAX, but there is nothing for PD.
>
>
>
> MAX/MSP SDK provides a buffer structure, named “t_buffer”, and its  
> member variable, “b_valid”, has a role to indicate if the buffer is  
> valid.
>
> However, I can’t find anything in PD, regarding that.
>
>
>
> I am wondering if PD library has a function or variable which is  
> similar in MAX/MSP SDK to check whether or not a buffer is valid.
>
> If so, I would appreciate if anyone of you let me know it.
>
>
>
> Best regards,
>
> Ji-Sun
>
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Thomas Grill
http://grrrr.org


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