+#endif
+
+/**
+ * Parse MPEG-4 systems extradata from a raw buffer to retrieve audio configuration.
+ * @param[in] c MPEG4AudioConfig structure to fill.
+ * @param[in] buf Extradata from container.
+ * @param[in] size Extradata size in bytes.
+ * @param[in] sync_extension look for a sync extension after config if true.
+ * @param[in] logctx opaque struct starting with an AVClass element, used for logging.
+ * @return negative AVERROR code on error, AudioSpecificConfig bit index in extradata on success.
+ */
+int avpriv_mpeg4audio_get_config2(MPEG4AudioConfig *c, const uint8_t *buf,
+ int size, int sync_extension, void *logctx);