[linux-dvb] [BUG] changeset 9029 (http://linuxtv.org/hg/v4l-dvb/rev/aa3e5cc1d833)

Steven Toth stoth at linuxtv.org
Mon Feb 16 20:13:35 CET 2009


> Hartmut, Oliver and Trent: Thanks for helping with this issue. I've just
> reverted the changeset. We still need a fix at dm1105, au0828-dvb and maybe
> other drivers that call the filtering routines inside IRQ's.

Fix the demux, add a worker thread and allow drivers to call it directly.

I'm not a big fan of videobuf_dvb or having each driver do it's own thing as an 
alternative.

Fixing the demux... Would this require and extra buffer copy? probably, but it's 
a trade-off between  the amount of spent during code management on a driver by 
driver basis vs wrestling with videobuf_dvb and all of problems highlighted on 
the ML over the last 2 years.

demux->register_driver()
demux->deliver_payload()
demux->unregister_driver()

Then deprecate sw_filter....N() methods.

That would simplify drivers significantly, at the expense of another buffer copy 
while deliver-payload() clones the buffer into its internal state to be more timely.

- Steve




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