diff options
Diffstat (limited to 'src/trau/osmo_ortp.c')
| -rw-r--r-- | src/trau/osmo_ortp.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/trau/osmo_ortp.c b/src/trau/osmo_ortp.c index b2ee040..c9480ff 100644 --- a/src/trau/osmo_ortp.c +++ b/src/trau/osmo_ortp.c @@ -436,6 +436,28 @@ int osmo_rtp_socket_connect(struct osmo_rtp_socket *rs, const char *ip, uint16_t return osmo_rtp_socket_fdreg(rs); } +/*! \brief Increment timestamp on a RTP socket without sending any packet + * \param[in] rs OsmoRTP socket + * \param[in] duration duration in number of RTP clock ticks + * + * Useful to keep the RTP internal clock up to date if an RTP frame should be + * send at a given time but no audio content is available. When next packet is + * sent, the receiver will see a different increase on the sequence number and + * the timestamp, and it should then take it as a synchronization point. For + * that same reason, it is advisable to enable the marker bit on the next RTP + * packet to be sent after calling this function. + * + * \returns 0 on success, <0 in case of error. + */ +int osmo_rtp_skipped_frame(struct osmo_rtp_socket *rs, unsigned int duration) +{ + if (rs->flags & OSMO_RTP_F_DISABLED) + return 0; + + rs->tx_timestamp += duration; + return 0; +} + /*! \brief Send one RTP frame via a RTP socket * \param[in] rs OsmoRTP socket * \param[in] payload pointer to buffer with RTP payload data |