ZeroLink: unknown symbol '_VDSetVideoParamValue'

[Steve Sisak]

At 6:52 PM -0500 12/16/04, Dr. William H.A. Beaudot wrote:
>I attempted to use ioxperts public API with the beta driver 1.1b30 
>to control my Orbit camera's pan/tilt position (in a Xcode project).
>At execution time, I systematically get:
>
>ZeroLink: unknown symbol '_VDSetVideoParamValue'
>
>What did I do wrong? or forget to do something obvious? Do I need to 
>link my code to a specific framework???

You need to add the glue file VDigProperty.cp to your project.

You can get it here:

   <ftp://ftp.ioxperts.com/IOXperts/Developers/VDigProperty.cp>

The way QuickTime components work on PowerPC is to use a glue 
function to copy the function parameters from registers into a 
structure on the stack (which happens to be the same as the 68k stack 
frame you'd get by calling the function) and then invoke the global 
routine CallComponentUPP.

VDigProperty.cp implements the glue for the routines in VDigProperty.h

HTH,

-Steve
-- 
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Steve Sisak, CTO                                 steve.sisak at ioxperts.com
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