static av_cold int name_##_init(AVFilterContext *ctx) \
{ \
BiquadsContext *s = ctx->priv; \
- s->class = &name_##_class; \
s->filter_type = name_; \
return 0; \
} \
\
-AVFilter ff_af_##name_ = { \
+const AVFilter ff_af_##name_ = { \
.name = #name_, \
.description = NULL_IF_CONFIG_SMALL(description_), \
.priv_size = sizeof(BiquadsContext), \