lavfi/hqdn3d: make use of AVFILTER_DEFINE_CLASS

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavfilter/vf_hqdn3d.c

@@ -320,7 +320,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 
 #define OFFSET(x) offsetof(HQDN3DContext, x)
 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
-static const AVOption options[] = {
+static const AVOption hqdn3d_options[] = {
     { "luma_spatial",   "spatial luma strength",    OFFSET(strength[LUMA_SPATIAL]),   AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, 0, DBL_MAX, FLAGS },
     { "chroma_spatial", "spatial chroma strength",  OFFSET(strength[CHROMA_SPATIAL]), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, 0, DBL_MAX, FLAGS },
     { "luma_tmp",       "temporal luma strength",   OFFSET(strength[LUMA_TMP]),       AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, 0, DBL_MAX, FLAGS },
@@ -328,12 +328,7 @@ static const AVOption options[] = {
     { NULL },
 };
 
-static const AVClass hqdn3d_class = {
-    .class_name = "hqdn3d",
-    .item_name  = av_default_item_name,
-    .option     = options,
-    .version    = LIBAVUTIL_VERSION_INT,
-};
+AVFILTER_DEFINE_CLASS(hqdn3d);
 
 static const AVFilterPad avfilter_vf_hqdn3d_inputs[] = {
     {