X-Git-Url: https://git.distorted.org.uk/~mdw/disorder/blobdiff_plain/59cf25c47fbda22f3f4e14399f0436cc6ed2c56f..132a5a4a47f9dbc7c52ee15234d70258c59ccf8e:/lib/rtp.h

diff --git a/lib/rtp.h b/lib/rtp.h
index 3ac14be..d0ab1ed 100644
--- a/lib/rtp.h
+++ b/lib/rtp.h
@@ -15,16 +15,49 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+/** @file lib/rtp.h
+ * @brief RTP packet header format
+ *
+ * See <a href="http://www.ietf.org/rfc/rfc1889.txt">RFC1889</a>.
+ */
 
 #ifndef RTP_H
 #define RTP_H
 
-/* RTP is defined in RFC1889 */
+/** @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>).
+ */
 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.
+   */
   uint8_t vpxcc;
+
+  /** @brief Marker and payload type
+   *
+   * Marker is bit 7.  Profile-defined.
+   *
+   * Payload Type is bits 0-6.  Profile defined.  
+   */
   uint8_t mpt;
+
+  /** @brief Sequence number */
   uint16_t seq;
+
+  /** @brief Timestamp */
   uint32_t timestamp;
+
+  /** @brief Synchronization source */
   uint32_t ssrc;
 };