avfilter: add asupercut filter

1 files changed, 18 insertions, 3 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index 109cacc23d..488d3c4654 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1838,7 +1838,7 @@ Set central frequency for band.
 If input doesn't have that frequency the entry is ignored.
 
 @item w
-Set band width in hertz.
+Set band width in Hertz.
 
 @item g
 Set band gain in dB.
@@ -1903,7 +1903,7 @@ Syntax for the commands is : "@var{fN}|f=@var{freq}|w=@var{width}|g=@var{gain}"
 @var{fN} is existing filter number, starting from 0, if no such filter is available
 error is returned.
 @var{freq} set new frequency parameter.
-@var{width} set new width parameter in herz.
+@var{width} set new width parameter in Hertz.
 @var{gain} set new gain parameter in dB.
 
 Full filter invocation with asendcmd may look like this:
@@ -2584,7 +2584,7 @@ Set delay line feedback gain value. Allowed range is from 0 to 1.
 Default value is 0.5.
 
 @item cutoff
-Set cutoff frequency in herz. Allowed range is 50 to 900.
+Set cutoff frequency in Hertz. Allowed range is 50 to 900.
 Default value is 100.
 
 @item slope
@@ -2600,6 +2600,21 @@ Default value is 20.
 
 This filter supports the all above options as @ref{commands}.
 
+@section asupercut
+Cut super frequencies.
+
+The filter accepts the following options:
+
+@table @option
+@item cutoff
+Set cutoff frequency in Hertz. Allowed range is 20000 to 192000.
+Default value is 20000.
+@end table
+
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
 @section atempo
 
 Adjust audio tempo.