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Hi,<br>
<br>
<div class="moz-cite-prefix">On 2022-10-25 11:50, Ralph Little
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1f31169a-29ad-d370-89d6-d50e66808412@gmail.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
Hi,<br>
<br>
<div class="moz-cite-prefix">On 2022-10-23 23:43, Вассисуалий
Пупкин wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1666592623.0745960000.xhh1lk12@frv55.fwdcdn.com">
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charset=UTF-8">
<span style="display:block;" class="xfm_72669700">
<div><span style="display:block;">
<div><span
style="font-family:Arial;font-size:12pt;line-height:14pt;">Hello.</span></div>
<div><br>
</div>
<div><span
style="font-family:Arial;font-size:12pt;line-height:14pt;">Did
the scan report intercepted by wareshark help? How can
I additionally help to resolve the issue with the
drivers on the Canon MF112?</span></div>
<div><span
style="font-family:Arial;font-size:12pt;line-height:14pt;"><span
style="font-family:Arial;font-size:12pt;line-height:14pt;">Sending
another report from Wareshark.</span></span></div>
<div><span
style="font-family:Arial;font-size:12pt;line-height:14pt;"><br>
</span></div>
<div><span
style="font-size:12pt;line-height:14pt;font-family:Arial;">Many
thanks!</span></div>
</span></div>
</span> </blockquote>
<br>
I have decoded the data stream from the PCAP and converted it into
a PNM file to see what it looks like and I can see what you see.
For RAW data, there aren't enough bytes for the dimensions
requested (150dpi at 1280x2100 geometry) and I get a mostly empty
document with a strip of fuzz at the top.<br>
<br>
I did wonder if the data was JPEG because some pixma machines
output JPEG but I do not see a JFIF header in the data.<br>
If you wish, you could set the machine definition to expect JPEG
in the entry in pixma_imageclass.c for your machine, at the bottom
of the file:<br>
<br>
DEV ("Canon i-SENSYS MF110/910 Series", "MF110", MF110_PID, 600,
0, 640, 1050, PIXMA_CAP_JPEG),<br>
<br>
...and rebuild the backend. Then see if it works for you. I don't
know if the JFIF header requirement is strictly necessary. This is
something that I am learning about at the moment. If you need help
on building the backend then let us know and we can help.<br>
<br>
Some pixma machines (like in the mp150 family) support JPEG only
on the ADF. I don't see such a restriction in the code for
imageClass machines however.<br>
<br>
</blockquote>
<br>
Actually, I missed the first entries that the scanner sends and it
is indeed JPEG, but it has an EXIF format. That's actually new to
me. You never stop learning.<br>
<br>
The header information is sent much earlier, evidently before the
main scanning process gets going.<br>
<br>
0040 ff d8 ff e1 00 fd 45 78 69 66 00 00 4d 4d 00 2a
......Exif..MM.*<br>
0050 00 00 00 08 00 08 01 0f 00 02 00 00 00 06 00 00
................<br>
0060 00 6e 01 10 00 02 00 00 00 11 00 00 00 74 01 1a
.n...........t..<br>
0070 00 05 00 00 00 01 00 00 00 85 01 1b 00 05 00 00
................<br>
0080 00 01 00 00 00 8d 01 28 00 03 00 00 00 01 00 02
.......(........<br>
0090 00 00 01 31 00 02 00 00 00 06 00 00 00 95 02 13
...1............<br>
00a0 00 03 00 00 00 01 00 01 00 00 87 69 00 04 00 00
...........i....<br>
00b0 00 01 00 00 00 9b 00 00 00 00 43 61 6e 6f 6e 00
..........Canon.<br>
00c0 4d 46 31 31 30 2f 39 31 30 20 53 65 72 69 65 73 MF110/910
Series<br>
00d0 00 00 00 00 96 00 00 00 01 00 00 00 96 00 00 00
................<br>
00e0 01 30 31 2e 30 31 00 00 07 90 00 00 07 00 00 00
.01.01..........<br>
<br>
So what I would suggest is to perform the above modification to the
device entry and try a scan. It will probably work.<br>
<br>
Cheers,<br>
Ralph<br>
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