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<TITLE>sane-devel: Re: Missing mustek backend maintainer, got patches?</TITLE>
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<META NAME="Author" CONTENT="Petter Reinholdtsen (pere@hungry.com)">
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<META NAME="Subject" CONTENT="Re: Missing mustek backend maintainer, got patches?">
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<H1>Re: Missing mustek backend maintainer, got patches?</H1>
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<!-- received="Sat Mar 4 05:33:48 2000" -->
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<!-- name="Petter Reinholdtsen" -->
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<!-- subject="Re: Missing mustek backend maintainer, got patches?" -->
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<!-- inreplyto="Missing mustek backend maintainer, got patches?" -->
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<STRONG>From:</STRONG> Petter Reinholdtsen (<A HREF="mailto:pere@hungry.com?Subject=Re:%20Missing%20mustek%20backend%20maintainer,%20got%20patches?&In-Reply-To=<200003041332.VAA11080@xena.ee.uwa.edu.au>"><EM>pere@hungry.com</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sat Mar 04 2000 - 05:32:10 PST
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<LI><STRONG>Next message:</STRONG> <A HREF="0025.html">Christian Völker: "Re: sane and devices"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0023.html">Oliver Rauch: "Re: sane and devices"</A>
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<P>
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[Alex Bond]
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<BR>
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<EM>> Hi
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> I managed to achieve better Mustek SE12000 performance without
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</EM><BR>
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<EM>> "forwards-backwards" by making the buffer size in mustek.c, i.e.
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</EM><BR>
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<EM>> lines_per_buffer = 15603 (or up to 16800) / bpl;
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</EM><BR>
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<EM>> for scanning at up to 300 and (sometimes?!) 600 dpi in Gayscale and
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</EM><BR>
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<EM>> 75 dpi in color. The carriage does stop while scanning still, but as
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</EM><BR>
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<EM>> there is no backward movement, the overall performance is much
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</EM><BR>
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<EM>> better now!
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Well, I tried with the new sg.h to increase the SG_BIG_BUFF to 2MB
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</EM><BR>
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<EM>> while setting in the backends
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</EM><BR>
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<EM>> lines_per_buffer = scsi_max_req_sise / bpl;
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</EM><BR>
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<EM>> The scanner (SE !!!) accepts it. And it scans with making 2M
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</EM><BR>
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<EM>> requests. The backwards-forwards problem however persists. So it
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</EM><BR>
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<EM>> looks like it is the sanei_scsi.c implementation that is being
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</EM><BR>
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<EM>> guilty for not freeing the scanner's internal buffer properly.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Another thing that I noticed is that in Win scanning at greater
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</EM><BR>
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<EM>> resolution is done with physically slower carriage movement, which
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</EM><BR>
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<EM>> is not the case with sane. The carriage tries to move fast, then the
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</EM><BR>
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<EM>> internal buffer is (probably) filled and backwards-forwards
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</EM><BR>
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<EM>> happens. It might be therefore possible that one somehow should try
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</EM><BR>
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<EM>> n set the scanning speed (which is disabled in Mustek).
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Hope the above (empirical) information may be useful.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Regards and Guessen,
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Alex Bond
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</EM><BR>
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<EM>> <A HREF="mailto:alex831973@geocities.com?Subject=Re:%20Missing%20mustek%20backend%20maintainer,%20got%20patches?&In-Reply-To=<200003041332.VAA11080@xena.ee.uwa.edu.au>">alex831973@geocities.com</A>
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</EM><BR>
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<P>I'm pretty sure the info is useful, and pass it on to the list.
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<BR>
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<P>Please send such information directly to the list
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<BR>
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<A HREF="mailto:sane-devel@mostang.com?Subject=Re:%20Missing%20mustek%20backend%20maintainer,%20got%20patches?&In-Reply-To=<200003041332.VAA11080@xena.ee.uwa.edu.au>">sane-devel@mostang.com</A> the next time. :-)
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<BR>
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<P>Happy hacking
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<BR>
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<PRE>
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--
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##> Petter Reinholdtsen <## | <A HREF="mailto:pere@td.org.uit.no?Subject=Re:%20Missing%20mustek%20backend%20maintainer,%20got%20patches?&In-Reply-To=<200003041332.VAA11080@xena.ee.uwa.edu.au>">pere@td.org.uit.no</A>
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O- <SCRIPT Language="Javascript">window.close()</SCRIPT>
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<A HREF="http://www.hungry.com/~pere/">http://www.hungry.com/~pere/</A> | Go Mozilla, go! Go!
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<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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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Missing%20mustek%20backend%20maintainer,%20got%20patches?&In-Reply-To=<200003041332.VAA11080@xena.ee.uwa.edu.au>">majordomo@mostang.com</A>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Sat Mar 04 2000 - 05:34:13 PST</EM>
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