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
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