Add support for Sony RAW image format magic detection #142
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- Add detection for `image/x-raw-sony` format in `lib/marcel/tables.rb`. - Updated test fixture for Sony RAW image format (`arw.arw`). - Update `magic_test.rb` to improve error message clarity in assertions.
bogdan
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bogdan
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Dec 13, 2025
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image/x-raw-sonyis a proprietary extension ofimage/tiffproduced by Sony camera with.arwextension.This PR implements the detection of mime type based on file content (not just extension).
I had a lot of problems finding a sample .arw file of small size. The one inside the repo is not quite real .arw file produced by camera: it is lacking
SONYtag and can not be used for "magic" detection.Because this is proprietary format, it can only be produced by Sony camera and they provide some samples, but the smallest I found was 16MB.
So, I just truncated a file to be smaller and put it to the repo. It can not be opened by image view software, but its first 8KB are enough for mime type detection.