[linux-dvb] Re: TS feed circular buffer

[Johannes Stezenbach <js@convergence.de>]

Hi again,

Rob.McConnell@Zarlink.Com wrote:
> 
> What is the purpose of the circular buffer "buffer" in the "dvb_demux_feed"
> struct?  Looking through the code I see that we have #define NOBUFS  which
> seems to mean that this circular buffer isn't used at the moment.  The only
> buffers I can see that would be used are the physical hardware buffer which
> the filtered packets are dumped into from a feed (dependent on the h/w),  a
> temporary section buffer used when the h/w can't perform section filtering
> and a circular buffer attached to each filter that a user process waits on.
> 
> Could the "set" method in the TS Feed API be used to set a h/w
> buffer/circular buffer instead of a vmalloc if NOBUFS is not defined?  When
> would you use this circular buffer when NOBUFS is NOT defined?

The kernel demux API needs some cleanup, too. I don't know about
the NOBUFS stuff, but a way to set the hw fifos is on my TODO.

Johannes


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