- * optional audio file header
- *
- * This is read from a sender in case a new client connects in the
- * middle of the stream. The audio format handler does not need to set
- * this if the audio format does not need any special header treatment.
- * If non-NULL, it must point to a buffer holding the current audio
- * file header.
- */
- char *header;
- /** the length of the header, ignored if \a header is \p NULL */
+ * The header is needed by senders in case a new client connects in the
+ * middle of the stream. The length of the header defaults to zero
+ * which means that this audio format does not need any special header
+ * treatment. The audio format handler does not need to set this to
+ * zero in this case.
+ */