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

doc/filters.texi

@@ -5992,8 +5992,7 @@ Generate various test patterns, as generated by the MPlayer test filter.
 The size of the generated video is fixed, and is 256x256.
 This source is useful in particular for testing encoding features.
 
-This source accepts an optional sequence of @var{key}=@var{value} pairs,
-separated by ":". The description of the accepted options follows.
+This source accepts the following options:
 
 @table @option
 

libavfilter/avfilter.c

@@ -685,6 +685,7 @@ int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque
         !strcmp(filter->filter->name, "lutyuv"     ) ||
         !strcmp(filter->filter->name, "lutrgb"     ) ||
         !strcmp(filter->filter->name, "mandelbrot" ) ||
+        !strcmp(filter->filter->name, "mptestsrc"  ) ||
         !strcmp(filter->filter->name, "negate"     ) ||
         !strcmp(filter->filter->name, "overlay"    ) ||
         !strcmp(filter->filter->name, "pad"        ) ||

libavfilter/vsrc_mptestsrc.c

@@ -262,12 +262,6 @@ static av_cold int init(AVFilterContext *ctx, const char *args)
     int64_t duration = -1;
     int ret;
 
-    test->class = &mptestsrc_class;
-    av_opt_set_defaults(test);
-
-    if ((ret = (av_set_options_string(test, args, "=", ":"))) < 0)
-        return ret;
-
     if ((test->duration) && (ret = av_parse_time(&duration, test->duration, 1)) < 0) {
         av_log(ctx, AV_LOG_ERROR, "Invalid duration: '%s'\n", test->duration);
         return ret;