[pxc] how to maintain a capture queue

[Alessandro Rubini]

>     I've read the documentation, but I'm not sure how to maintain a capture
> queue of, say, 50 frames. The idea is to start capturing at any given
> moment, then capture for about 50 images (with no loss), then stop capture
> (no overwrite of previous buffers) and get a signal or something to let the
> process know the secuence is over.

This is what pxc_grab does. However, the backend is currently not
working.  Fortunately (for you), I must do it for a client in a
relatively short time.  Meanwhile, I've installed 0.26 on a 2.2
kernel. 0.26 uses the old way to grab sequences, that was a quick hack
not really worth showing around.

/alessandro