[FFmpeg-trac] #4829(swscale:closed): Overflows (?) in xyz -> rgb conversion

[FFmpeg]

#4829: Overflows (?) in xyz -> rgb conversion
-------------------------------------+-------------------------------------
             Reporter:  Carl Eugen   |                    Owner:  Niklas
  Hoyos                              |  Haas <git@…>
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:  swscale
              Version:  git-master   |               Resolution:  fixed
             Keywords:  xyz          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by Niklas Haas <git@…>):

 * owner:  (none) => Niklas Haas <git@…>
 * resolution:   => fixed
 * status:  open => closed

Comment:

 In [changeset:"af6d52eec66961f6a502b0f2f390c12226d087cd/ffmpeg"
 af6d52ee/ffmpeg]:
 {{{#!CommitTicketReference repository="ffmpeg"
 revision="af6d52eec66961f6a502b0f2f390c12226d087cd"
 swscale: use 16-bit intermediate precision for RGB/XYZ conversion

 The current logic uses 12-bit linear light math, which is woefully
 insufficient
 and leads to nasty postarization artifacts. This patch simply switches the
 internal logic to 16-bit precision.

 This raises the memory requirement of these tables from 32 kB to 272 kB.

 All relevant FATE tests updated for improved accuracy.

 Fixes: #4829
 Signed-off-by: Niklas Haas <git at haasn.dev>
 Sponsored-by: Sovereign Tech Fund
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/4829#comment:11>
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