The original issue that I had with this patch was in the cancel function
where the patch author had commented out the "stop scan" call for cancel.
This made no sense to me. I have put it back in for testing.
It might have been accidentally left out.
Ulf and I will review and test this patch on this branch.
It does seem to fix the issue, but I want to check it out a little more
before we commit it to master.
i1120 has another offset. When scanning in ADF multi-page mode (the
default), the very first sheet is moved 1.5mm down. That leads to 1.5mm
being cut off at the bottom.
This implements the (hopefully last) offset setting for multi-sheet ADF
scans.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
This adds offset compensation for ADF front-only scans, which may
have different offsets than ADF duplex scans.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
This is a complete rewrite of the offset compensation using a
combination of overscan and line skipping. It replaces the option
AV_REAR_OFFSET by specifying exact offset values for each scanner.
This was needed for Kodak i1120 which needs bottom line skipping.
The old implementation could not skip bottom lines since we could
not know how many lines we will get in the end from ADF.
The new implementation redirects the output file descriptor to a
temporary file. After the current page is completely scanned,
offsets are applied and the output is passed to the original
output file descriptor.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Kodak i1120 has single-sheet and multi-sheet scan modes. This option sets
bitset3[7] which enables multi-sheet scan by default so there is no pause
of 1s between two sheets in ADF scan mode. This also fixes some offsets
when scanning multiple sheets.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Kodak i1120 has a different gamma table format that looks like a
uint16/double array. Implement it and add an option for it.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Some scanners like i1120 support fast feed-out of the sheet when
cancelling a running scan. Add a new option for this release type.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Kodak broke rear-only scan (bitset3[3]) when they modified the Avision
firmware. It would be possible to add a work-around that drops front data and
writes rear data only. Because of deinterlacing, offsets etc. this is way too
complicated. The simpliest solution to scan rear-only is to turn around the
paper stack and use front scan instead.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Rolf Bensch