lavfi/histeq: switch to an AVOptions-based system.

doc/filters.texi

@@ -3445,12 +3445,7 @@ viewed as an "automatically adjusting contrast filter". This filter is
 useful only for correcting degraded or poorly captured source
 video.
 
-The filter accepts parameters as a list of @var{key}=@var{value}
-pairs, separated by ":". If the key of the first options is omitted,
-the arguments are interpreted according to syntax
-@var{strength}:@var{intensity}:@var{antibanding}.
-
-This filter accepts the following named options:
+The filter accepts the following options:
 
 @table @option
 @item strength

libavfilter/avfilter.c

@@ -679,6 +679,7 @@ int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque
         !strcmp(filter->filter->name,  "frei0r_src") ||
         !strcmp(filter->filter->name,  "geq"       ) ||
         !strcmp(filter->filter->name, "gradfun"    ) ||
+        !strcmp(filter->filter->name, "histeq"     ) ||
         !strcmp(filter->filter->name, "hqdn3d"     ) ||
         !strcmp(filter->filter->name, "ocv"        ) ||
         !strcmp(filter->filter->name, "life"       ) ||

libavfilter/vf_histeq.c

@@ -269,8 +269,6 @@ static const AVFilterPad histeq_outputs[] = {
     { NULL }
 };
 
-static const char *const shorthand[] = { "strength", "intensity", "antibanding", NULL };
-
 AVFilter avfilter_vf_histeq = {
     .name          = "histeq",
     .description   = NULL_IF_CONFIG_SMALL("Apply global color histogram equalization."),
@@ -281,5 +279,4 @@ AVFilter avfilter_vf_histeq = {
     .inputs        = histeq_inputs,
     .outputs       = histeq_outputs,
     .priv_class    = &histeq_class,
-    .shorthand     = shorthand,
 };