#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 <g...@haasn.dev>
Sponsored-by: Sovereign Tech Fund
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4829#comment:11>
FFmpeg <https://ffmpeg.org>
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