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gerrit.osmocom.org / libosmo-abis / 28eeb6bc9365bbe47125775fcb1f696317c22466
commit28eeb6bc9365bbe47125775fcb1f696317c22466[log] [tgz]
authorPhilipp Maier <pmaier@sysmocom.de>Wed May 30 10:52:41 2018 +0200
committerPhilipp Maier <pmaier@sysmocom.de>Wed May 30 14:07:17 2018 +0200
tree7bc38c1dca9d0bb46a3815bd538661260990a019
parent7632278ea36c25eaa0d8e35fa0ee102ec05dc802 [diff]
ortp: reset rtp session on SSRC changes

When libortp detects a timestamp jump, we resynchronize the session
in order to restore proper rtp frame reception. However, we do not
resynchronize on an SSRC change. An SSRC change usually indicates
the change of an RTP stream source, which is a much more profound
event than a timestamp change, so we should even reset the session
on SSRC changes.

Also, not resynchronizing the session on an SSRC change causes
problems when the jitter buffer feature is used. In those cases
it takes libortp a long time until it finally detects the timestamp
jump and the session resyhcornization happens late.

- reset the ession on SSRC changes by calling rtp_session_reset()

Change-Id: I8688a55cd20d0e14493c357db80754851e12f2fb
Related OS#3299
1 file changed
tree: 7bc38c1dca9d0bb46a3815bd538661260990a019
  1. contrib/
  2. debian/
  3. include/
  4. m4/
  5. src/
  6. tests/
  7. .gitignore
  8. .gitreview
  9. AUTHORS
  10. configure.ac
  11. COPYING
  12. git-version-gen
  13. libosmoabis.pc.in
  14. libosmotrau.pc.in
  15. Makefile.am
  16. README.md
  17. TODO-RELEASE
README.md

libosmo-abis - Osmocom Abis interface library

This repository contains a set of C-language libraries that form the A-bis interface library of Osmocom Open Source Mobile Communications projects such as OpenBSC / OsmoBSC.

Historically, a lot of this code was developed as part of the OpenBSC project, but which are of a more generic nature and thus useful to (at least) other programs that we develop in the sphere of Free Software / Open Source mobile communications.

The libosmo-abis.git repository build multiple libraries:

  • libosmoabis contains some abstraction layer over E1/T1 and IP based ETSI/3GPP A-bis interface. It can use mISDN and DAHDI as underlying driver/hardware.
  • libosmotrau contains routines related to A-bis TRAU frame handling

Homepage

The official homepage of the project is https://osmocom.org/projects/libosmo-abis

GIT Repository

You can clone from the official libosmo-abis.git repository using

git clone git://git.osmocom.org/libosmo-abis.git

There is a cgit interface at http://git.osmocom.org/libosmo-abis/

Documentation

There is no Doxygen-generated API documentation yet for this library. It would be great to some day have it, comparable to libosmocore.

Mailing List

Discussions related to libosmo-abis are happening on the openbsc@lists.osmocom.org mailing list, please see https://lists.osmocom.org/mailman/listinfo/openbsc for subscription options and the list archive.

Please observe the Osmocom Mailing List Rules when posting.

Contributing

Our coding standards are described at https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards

We us a gerrit based patch submission/review process for managing contributions. Please see https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit for more details

The current patch queue for libosmo-abis can be seen at https://gerrit.osmocom.org/#/q/project:libosmo-abis+status:open