[FFmpeg-trac] #1897(undetermined:new): arbitrary maxval for netpbm image formats (pam, pnm, pgm)

[FFmpeg]

#1897: arbitrary maxval for netpbm image formats (pam,pnm,pgm)
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               Reporter:  richardpl  |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
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 Files that are created with pamdepth with maxval argument as 512 for
 example (from original 255) decodes as black.

 Is there some nice way to support this instead of doing insane
 calculations as it is currently done for grayscale in pnmdec.c (see
 upgrade arg) ?

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1897>
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