[PD] PDP updates

[Tom Schouten]

> 
> I have a request from the documentation point of view.  It would be  
> very handy if the docs and the example patches used a cross-platform  
> method for getting video in.  Also, rather than using live video in the  
> docs and examples, it would be easier for most people if you could use  
> a video file.  Then people without a video camera could play with the  
> docs and help files.

good point.
there are the [pdp_help_input] and [pdp_help_output] paches that could
be changed on install. i never got to automagically fill them in the
install/compile process though..

> 
> And lastly, a cross-platform method of outputting.  [pdp_xv] is used in  
> the docs and examples.  It compiles and loads on Mac OS X, but no one  
> AFAIK has gotten it working yet.

another thing on the list. i'm thinking of [pdp_vdac] and [pdp_vadc]