- * @returns Pointer to a newly allocated struct srd_decoder_instance, or
- * NULL in case of failure.
+ * @param id Decoder 'id' field.
+ * @param instance_id Optional unique identifier for this instance. If NULL,
+ * the 'id' parameter is used.
+ * @return Pointer to a newly allocated struct srd_decoder_instance, or
+ * NULL in case of failure.