On Tue, 24 Oct 2006, Henning Meier-Geinitz wrote:
> On 2006-10-24 15:47, astrand cendio.se wrote:
> > Hi. Can anyone explain the state of the SANE2
branch? I've noticed that
> > the SANE2 development seems inactive. Is this
branch discontinued?
>
> The development of SANE2 hasn't begun, there have been
only
> discussions and there is a draft of the SANE2 standard.
The standard
> is not finished yet as some of the problems are not
easy to solve.
Ok, I'll stick to SANE1 for now, then.
> > I will make a try to eliminate the separate data
port requirement for
> > "saned". I think it should be possible
to do this by extending the SANE1
> > protocol in a backwards compatible way, say, by
introducing a new RPC
> > call. Comments on this?
>
> Possible problems: You can't cancel a scan while data
acquisition is
> in progress. This is one of the adavantages of the 2
port solution.
I think cancel should be possible even without the separate
port. TCP is
bi-directional: You can send a cancel request to
"saned" even though data
flows in the other direction.
It's true that most RPC servers (including saned, I guess)
won't respond
to new requests until the last one is finished, but my plan
is not to
transfer all data in one single call, but let the client do
several calls,
just like sane_read(). So, the client should be able to
cancel the
acquisition instead of calling the server for more data.
Regards,
--
Peter Åstrand ThinLinc Chief Developer
Cendio AB http://www.cendio.se
Teknikringen 3
583 30 Linköping Phone: +46-13-21 46 00--
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