From 34102f8c07dee33e3dcd954f43dd15fc9925aee4 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sun, 26 Sep 2021 15:39:43 +0200
Subject: avfilter/vf_colorlevels: add preserve color option

---
 doc/filters.texi | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'doc')

diff --git a/doc/filters.texi b/doc/filters.texi
index a10f5e71d1..b309e8c737 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -8540,6 +8540,25 @@ Adjust red, green, blue and alpha output white point.
 Allowed ranges for options are @code{[0, 1.0]}. Defaults are @code{1}.
 
 Output levels allows manual selection of a constrained output level range.
+
+@item preserve
+Set preserve color mode. The accepted values are:
+@table @samp
+@item none
+Disable color preserving, this is default.
+@item lum
+Preserve luminance.
+@item max
+Preserve max value of RGB triplet.
+@item avg
+Preserve average value of RGB triplet.
+@item sum
+Preserve sum value of RGB triplet.
+@item nrm
+Preserve normalized value of RGB triplet.
+@item pwr
+Preserve power value of RGB triplet.
+@end table
 @end table
 
 @subsection Examples
-- 
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