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

doc/filters.texi

@@ -5919,9 +5919,7 @@ cellauto=p='@@@@ @@ @@@@':s=100x400:full=0:rule=18
 Generate a Mandelbrot set fractal, and progressively zoom towards the
 point specified with @var{start_x} and @var{start_y}.
 
-This source accepts a list of options in the form of
-@var{key}=@var{value} pairs separated by ":". A description of the
-accepted options follows.
+This source accepts the following options:
 
 @table @option
 

libavfilter/avfilter.c

@@ -684,6 +684,7 @@ int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque
         !strcmp(filter->filter->name, "lut"        ) ||
         !strcmp(filter->filter->name, "lutyuv"     ) ||
         !strcmp(filter->filter->name, "lutrgb"     ) ||
+        !strcmp(filter->filter->name, "mandelbrot" ) ||
         !strcmp(filter->filter->name, "negate"     ) ||
         !strcmp(filter->filter->name, "overlay"    ) ||
         !strcmp(filter->filter->name, "pad"        ) ||

libavfilter/vsrc_mandelbrot.c

@@ -122,13 +122,7 @@ AVFILTER_DEFINE_CLASS(mandelbrot);
 static av_cold int init(AVFilterContext *ctx, const char *args)
 {
     MBContext *mb = ctx->priv;
-    int err;
 
-    mb->class = &mandelbrot_class;
-    av_opt_set_defaults(mb);
-
-    if ((err = (av_set_options_string(mb, args, "=", ":"))) < 0)
-        return err;
     mb->bailout *= mb->bailout;
 
     mb->start_scale /=mb->h;