pointer to pointer to void (void**) - iTunes VisualSDK

[seboslaw]

Hey guys,

I'm sorry if this question is rather second grade of programming, but my C programming days are long ago :-(
I'm trying to write a visual plugin for iTunes using their VisualSDK, which contains a function to retrieve the AlbumArt (Cover) of the currently played song.
Now the returns the cover as a "Handle", which in the SDK's case is a "void **" pointer. I have no clue, whether this actually points to a byte array bitmap and the API information is more than shallow. Hence, my question:

How can I proceed with the "void **" pointer? Is there a way to gain the size of what it is pointing at so that I can write it as binary data to a file?

Regards,

Sebastian

[weaknessforcats]

You can tell from a pointer the size if the thing it points at becuse the pointer has a type, like an int* or a double*.

In your case you have a void**. That's just the address of a another void*. And that void* has the address of the thing.

Because of the "void-ness", you don't have the type so you are now blind.

I suspect you will need to have this information kept somewhere when you create the thing pointed at so you can get at that information here when you need it.

[Banfa]

Alternatively having got the handle look for further API functions to call that take a handle and return useful information.