+#define OFFSET(x) offsetof(EVRCContext, x)
+#define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM
+
+static const AVOption options[] = {
+ { "postfilter", "enable postfilter", OFFSET(postfilter), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, AD },
+ { NULL }
+};
+
+static const AVClass evrcdec_class = {
+ .class_name = "evrc",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+