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<!-- received="Mon Aug 30 10:51:39 1999 PDT" -->
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<!-- sent="Mon, 30 Aug 1999 19:53:10 +0200" -->
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<!-- name="Oliver Rauch" -->
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<!-- email="oliver.rauch@Wolfsburg.DE" -->
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<!-- subject="Re: SANE V2 - again..." -->
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<title>sane-devel: Re: SANE V2 - again...</title>
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<h1>Re: SANE V2 - again...</h1>
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<b>Oliver Rauch</b> (<a href="mailto:oliver.rauch@Wolfsburg.DE"><i>oliver.rauch@Wolfsburg.DE</i></a>)<br>
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<i>Mon, 30 Aug 1999 19:53:10 +0200</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#345">[ date ]</a><a href="index.html#345">[ thread ]</a><a href="subject.html#345">[ subject ]</a><a href="author.html#345">[ author ]</a>
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<li> <b>Next message:</b> <a href="0346.html">abel deuring: "Re: SANE V2 - again..."</a>
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<li> <b>Previous message:</b> <a href="0344.html">Oliver Rauch: "Re: SANE V2 - again..."</a>
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<li> <b>Maybe in reply to:</b> <a href="0327.html">abel deuring: "SANE V2 - again..."</a>
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<li> <b>Next in thread:</b> <a href="0346.html">abel deuring: "Re: SANE V2 - again..."</a>
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</ul>
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abel deuring wrote:<br>
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<p>
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<i>> Oliver Rauch wrote:</i><br>
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<i>> ></i><br>
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<i>> > Nick Lamb wrote:</i><br>
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<i>> ></i><br>
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<i>> > > Should all these data be</i><br>
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<i>> > > > considered as one data stream by the backend / frontend API,</i><br>
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<i>> > > > or should there be provisions to allow multiple data</i><br>
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<i>> > > > streams? I am sure that Tom Martone and other people working</i><br>
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<i>> > > > with this class of scanners have already thought about it,</i><br>
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<i>> > > > so I would like hear comments from them.</i><br>
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<i>> > ></i><br>
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<i>> > > There is a provision for multiple data frames, so the question</i><br>
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<i>> > > is: Should we use it for this in SANE 2.0, and I think the</i><br>
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<i>> > > answer has to be "Yes", unless there's a better idea.</i><br>
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<i>> > ></i><br>
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<i>> > > (SANE 1.0 doesn't use multiple data frames for this purpose,</i><br>
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<i>> > > but it does provide them for several other reasons anyway)</i><br>
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<i>> > ></i><br>
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<i>> ></i><br>
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<i>> > Hm, can anyone tell me for what that shall be good?</i><br>
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<i>></i><br>
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<i>> Hi Oliver,</i><br>
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<i>></i><br>
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<i>> I simply wondered how Tom's backend/frontend combination handles the</i><br>
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<i>> different types and sets of data (ASCII/pixel data) for one scan, and if</i><br>
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<i>> there should be any kind of hints given by the backend to the frontend,</i><br>
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<i>> how to handle these sets of data: should they be stored just in one</i><br>
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<i>> file, or in several files, for example.</i><br>
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<p>
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Hi Abel,<br>
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<p>
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I think we will save one image to one file.<br>
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For sane-2.0 I suggest to add a "comment" string to the<br>
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parameter block, the backend can write any comment, into<br>
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it and if the filetype allows comments in the header, the frontend<br>
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saves the comment to the file.<br>
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<p>
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If we have different images, we will save them to different<br>
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files so we call a new sane_start.<br>
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<p>
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If there is an audio stream or something else that shall be saved with the<br>
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image into one file, that can be done with a raw format that is generated<br>
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by the backend and the frontend simply saves the file.<br>
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<p>
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Bye<br>
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Oliver<br>
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<p>
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<p>
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<pre>
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--
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EMAIL: <a href="mailto:Oliver.Rauch@Wolfsburg.DE">Oliver.Rauch@Wolfsburg.DE</a>
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WWW: <a href="http://www.wolfsburg.de/~rauch">http://www.wolfsburg.de/~rauch</a>
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<p>
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<p>
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<p>
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<p>
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<pre>
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--
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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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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0346.html">abel deuring: "Re: SANE V2 - again..."</a>
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<li> <b>Previous message:</b> <a href="0344.html">Oliver Rauch: "Re: SANE V2 - again..."</a>
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<li> <b>Maybe in reply to:</b> <a href="0327.html">abel deuring: "SANE V2 - again..."</a>
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<li> <b>Next in thread:</b> <a href="0346.html">abel deuring: "Re: SANE V2 - again..."</a>
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