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Pau Espin Pedrol gerrit-no-reply at lists.osmocom.orgHello Max, Jenkins Builder, I'd like you to reexamine a change. Please visit https://gerrit.osmocom.org/3070 to look at the new patch set (#3). osmo_ortp: Add osmo_rtp_drop_frame API This API will be used by osmo-bts to maintain the sampling clock of the RTP socket whenever a frame should be sent but it is not available, for instance due to low quality of signal. Change-Id: Id6099372b6231c0a4b6ea0716f46f5daee7049e1 --- M include/osmocom/trau/osmo_ortp.h M src/trau/osmo_ortp.c 2 files changed, 23 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/libosmo-abis refs/changes/70/3070/3 diff --git a/include/osmocom/trau/osmo_ortp.h b/include/osmocom/trau/osmo_ortp.h index 9eb176f..578b1cb 100644 --- a/include/osmocom/trau/osmo_ortp.h +++ b/include/osmocom/trau/osmo_ortp.h @@ -76,6 +76,7 @@ int osmo_rtp_socket_connect(struct osmo_rtp_socket *rs, const char *ip, uint16_t port); int osmo_rtp_socket_set_pt(struct osmo_rtp_socket *rs, int payload_type); int osmo_rtp_socket_free(struct osmo_rtp_socket *rs); +int osmo_rtp_skipped_frame(struct osmo_rtp_socket *rs, unsigned int duration); int osmo_rtp_send_frame(struct osmo_rtp_socket *rs, const uint8_t *payload, unsigned int payload_len, unsigned int duration); int osmo_rtp_send_frame_ext(struct osmo_rtp_socket *rs, const uint8_t *payload, 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 @@ 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 -- To view, visit https://gerrit.osmocom.org/3070 To unsubscribe, visit https://gerrit.osmocom.org/settings Gerrit-MessageType: newpatchset Gerrit-Change-Id: Id6099372b6231c0a4b6ea0716f46f5daee7049e1 Gerrit-PatchSet: 3 Gerrit-Project: libosmo-abis Gerrit-Branch: master Gerrit-Owner: Pau Espin Pedrol <pespin at sysmocom.de> Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: Max <msuraev at sysmocom.de> Gerrit-Reviewer: Pau Espin Pedrol <pespin at sysmocom.de>