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pedrocr / rawloader

rust library to extract the raw data and some metadata from digital camera images
GNU Lesser General Public License v2.1
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random tile decoding problems #47

Open hanatos opened 10 months ago

hanatos commented 10 months ago

heya,

i'm using rawloader through a thin c-bindings layer (which you can find here).

when running this code on a sequence of dng files, i get random tile decoding issues which manifest themselves like so:

2023-09-27-152613_1131x709_scrot

or so:

2023-09-27-153744_955x694_scrot

jumping around the images. looks like a threading issue to me (?). is this a bug? am i calling it wrong? do i have to wait before reading out the buffer after calling rawloader::decode_file()?

pedrocr commented 10 months ago

If it happens randomly on the same input threading seems like the most likely culprit.

A quick check would be to set RAYON_NUM_THREADS to 1 in the shell and see if that makes a difference.

There's nothing in the API that needs waiting, the threading is all internal. It may be some kind of bug in the environment rayon needs that the C binding is not setting up.