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<TITLE>sane-devel: Backend: When to use reader process?</TITLE>
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<META NAME="Author" CONTENT="Frederik Ramm (frederik@remote.org)">
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<META NAME="Subject" CONTENT="Backend: When to use reader process?">
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<H1>Backend: When to use reader process?</H1>
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<!-- received="Wed Feb 28 08:11:13 2001" -->
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<!-- sent="Wed, 28 Feb 2001 16:22:34 +0000" -->
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<!-- isosent="20010228162234" -->
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<!-- name="Frederik Ramm" -->
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<!-- subject="Backend: When to use reader process?" -->
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<!-- id="20010228162234.A30915@aruba.remote.org" -->
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<STRONG>From:</STRONG> Frederik Ramm (<A HREF="mailto:frederik@remote.org?Subject=Re:%20Backend:%20When%20to%20use%20reader%20process?&In-Reply-To=<20010228162234.A30915@aruba.remote.org>"><EM>frederik@remote.org</EM></A>)<BR>
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<STRONG>Date:</STRONG> Wed Feb 28 2001 - 08:22:34 PST
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0254.html">Davis, Tom: "RE: Backend: When to use reader process?"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0252.html">Davis, Tom: "RE: Fujitsu fi-4750C Backend Project"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0254.html">Davis, Tom: "RE: Backend: When to use reader process?"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0254.html">Davis, Tom: "RE: Backend: When to use reader process?"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0257.html">Oliver Rauch: "Re: Backend: When to use reader process?"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0260.html">Uwe Wagner: "xsane crashes"</A>
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<HR NOSHADE><P>
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<!-- body="start" -->
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<P>
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Hi,
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<BR>
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<P> I've noticed that the driver I am basing my M3091 work on, the
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<BR>
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M3096 driver which was in turn derived from the Coolscan driver, uses
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<BR>
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a separate process for reading data from the scanner, which is then
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<BR>
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fed via a pipe file descriptor to sane_read.
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<BR>
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<P>Other drivers (like the Bell+Howell backend I've been looking at for
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<BR>
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duplex inspiration) don't use a separate process.
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<BR>
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<P>Which would be the preferred way to implement it for a max. 15ppm ADF
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<BR>
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scanner?
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<BR>
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<P>Bye
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<BR>
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Frederik
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<BR>
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<P><PRE>
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--
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Frederik Ramm ## eMail <A HREF="mailto:frederik@remote.org?Subject=Re:%20Backend:%20When%20to%20use%20reader%20process?&In-Reply-To=<20010228162234.A30915@aruba.remote.org>">frederik@remote.org</A> ## N57<35>48.10' W005<30>40.32'
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<P><P>--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0254.html">Davis, Tom: "RE: Backend: When to use reader process?"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0252.html">Davis, Tom: "RE: Fujitsu fi-4750C Backend Project"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0257.html">Oliver Rauch: "Re: Backend: When to use reader process?"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0260.html">Uwe Wagner: "xsane crashes"</A>
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