+/** @brief RTP packet header format
+ *
+ * See <a href="http://www.ietf.org/rfc/rfc1889.txt">RFC1889</a> (now obsoleted
+ * by <a href="http://www.ietf.org/rfc/rfc3550.txt">RFC3550</a>).
+ *
+ * All values in this structure are big-endian.
+ */
+struct attribute((packed)) rtp_header {
+ /** @brief Version, padding, extension and CSRC
+ *
+ * Version is bits 6 and 7; currently always 2.
+ *
+ * Padding is bit 5; if set frame includes padding octets.
+ *
+ * eXtension is bit 4; if set there is a header extension.
+ *
+ * CSRC Count is bits 0-3 and is the number of CSRC identifiers following the
+ * header.
+ */