+#define OFFSET(x) offsetof(OpusContext, x)
+#define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM
+static const AVOption opus_options[] = {
+ { "apply_phase_inv", "Apply intensity stereo phase inversion", OFFSET(apply_phase_inv), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, AD },
+ { NULL },
+};
+
+static const AVClass opus_class = {
+ .class_name = "Opus Decoder",
+ .item_name = av_default_item_name,
+ .option = opus_options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+