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

doc/filters.texi

@@ -3008,7 +3008,7 @@ For more information about fontconfig, check:
 
 Detect and draw edges. The filter uses the Canny Edge Detection algorithm.
 
-This filter accepts the following optional named parameters:
+The filter accepts the following options:
 
 @table @option
 @item low, high

libavfilter/avfilter.c

@@ -667,6 +667,7 @@ int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque
         !strcmp(filter->filter->name,  "drawbox"   ) ||
         !strcmp(filter->filter->name,  "drawtext"  ) ||
         !strcmp(filter->filter->name,  "ebur128"   ) ||
+        !strcmp(filter->filter->name,  "edgedetect") ||
         !strcmp(filter->filter->name,  "fade"      ) ||
         !strcmp(filter->filter->name,  "fieldorder") ||
         !strcmp(filter->filter->name,  "fps"       ) ||

libavfilter/vf_edgedetect.c

@@ -52,15 +52,8 @@ AVFILTER_DEFINE_CLASS(edgedetect);
 
 static av_cold int init(AVFilterContext *ctx, const char *args)
 {
-    int ret;
     EdgeDetectContext *edgedetect = ctx->priv;
 
-    edgedetect->class = &edgedetect_class;
-    av_opt_set_defaults(edgedetect);
-
-    if ((ret = av_set_options_string(edgedetect, args, "=", ":")) < 0)
-        return ret;
-
     edgedetect->low_u8  = edgedetect->low  * 255. + .5;
     edgedetect->high_u8 = edgedetect->high * 255. + .5;
     return 0;