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3.6 KiB
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<!-- received="Tue Jan 28 15:04:28 1997 MST" -->
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<!-- sent="Tue, 28 Jan 1997 16:39:30 +0100 (MET)" -->
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<!-- name="becka@sunserver1.rz.uni-duesseldorf.de" -->
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<!-- email="becka@sunserver1.rz.uni-duesseldorf.de" -->
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<!-- subject="Re: repeat post: xcam frontend for SANE" -->
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<!-- id="m0vpFdC-000BXuC@charon.beck-sw.de" -->
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<!-- inreplyto="199701271716.KAA25649@panda.mosberger" -->
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<title>sane-devel: Re: repeat post: xcam frontend for SANE</title>
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<h1>Re: repeat post: xcam frontend for SANE</h1>
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<a href="mailto:becka@sunserver1.rz.uni-duesseldorf.de"><i>becka@sunserver1.rz.uni-duesseldorf.de</i></a><br>
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<i>Tue, 28 Jan 1997 16:39:30 +0100 (MET)</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#53">[ date ]</a><a href="index.html#53">[ thread ]</a><a href="subject.html#53">[ subject ]</a><a href="author.html#53">[ author ]</a>
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<li> <b>Next message:</b> <a href="0054.html">David Mosberger-Tang: "Re: repeat post: xcam frontend for SANE"</a>
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<li> <b>Previous message:</b> <a href="0052.html">David Mosberger-Tang: "sane-0.42.tar.gz"</a>
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<li> <b>In reply to:</b> <a href="0050.html">David Mosberger-Tang: "repeat post: xcam frontend for SANE"</a>
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<li> <b>Next in thread:</b> <a href="0054.html">David Mosberger-Tang: "Re: repeat post: xcam frontend for SANE"</a>
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</ul>
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<i>> Finally, I found that the "first_frame" field in the parameter</i><br>
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<i>> structure to be rather useless. I'd much prefer to have a</i><br>
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<i>> "last_frame" field that tells you when the last frame in an image</i><br>
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<i>> arrived. Anybody have any objections to this? I can think of a</i><br>
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<i>> reason to want "first_frame" (since it will always be true for the</i><br>
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<i>> first frame after sane_start), but "last_frame" would be extremely</i><br>
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<i>> handy (e.g., xcam would decode/buffer frames until it hits the</i><br>
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<i>> last_frame, and then actually render the collected image).</i><br>
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<p>
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Maybe the "first_frame" bit gets read a bit more "in the right place", i.e.<br>
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_before_ starting to read the _first_ channel of the next image instead of<br>
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_before_ starting to read the _last_ channel of the next image.<br>
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<p>
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What I mean is if F mean the time, when the *_frame var is read :<br>
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<p>
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first_frame: F RR GG BB F RR GG BB F ...<br>
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<i> |-+------+ |-+------+ |-+--</i><br>
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<p>
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last _frame: RR GG L BB RR GG L BB RR<br>
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+-----|--+ +-----|--+<br>
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<p>
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Actually "first frame" should be interpreted as "finish processing the last<br>
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frame and prepare for a new one".<br>
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<p>
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CU,Andy<br>
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<p>
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<pre>
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--
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==============================================================================
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Andreas Beck | Email : <<a href="mailto:becka@sunserver1.rz.uni-duesseldorf.de">becka@sunserver1.rz.uni-duesseldorf.de</a>>
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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.azstarnet.com/~axplinux/sane/">http://www.azstarnet.com/~axplinux/sane/</a>
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To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@azstarnet.com">majordomo@azstarnet.com</a>
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</pre>
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<!-- body="end" -->
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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="0054.html">David Mosberger-Tang: "Re: repeat post: xcam frontend for SANE"</a>
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<li> <b>Previous message:</b> <a href="0052.html">David Mosberger-Tang: "sane-0.42.tar.gz"</a>
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<li> <b>In reply to:</b> <a href="0050.html">David Mosberger-Tang: "repeat post: xcam frontend for SANE"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0054.html">David Mosberger-Tang: "Re: repeat post: xcam frontend for SANE"</a>
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<!-- reply="end" -->
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</ul>
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