Actually Gerd, I just though of something.  Could the v4l2 use shared memory 
instead of mapped memory (I know that shared memory is mapped, I need the 
shmid)?  

I mean, the X system call to map the memory to the server takes (basically) 
just a shared memory ID from shmget.  Could I get an ID from the driver to 
both get access to the memory and pass to X?  That would solve all problems; 
then you would have control over where that memory came from, and I would not 
have to do any memcpy's.  

Then we could use (after memory allocation) the same interfaces you have 
already set up for v4l2.  

This seems like a pretty durable solution to me.  

Come on Gerd, this would rock.

I think it would be really sweet. 

(Oh please, say it can be done...)  

Chris




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