Bcg729 is an opensource implementation of both encoder and decoder of the ITU G729 Annex A/B speech codec. This library has been developed by Belledonne Communications, the company supporting the Linphone project. It was written from scratch and is NOT a derivative work of ITU reference source code in any kind.
The library written in C 99 is fully portable and can be executed on many platforms including both ARM and x86 processors. libbcg729 supports concurrent channels encoding/decoding for multi call application such as conferencing.
The source code also contains a mediastreamer2 compatible plugin, designed for use of this codec in Linphone or mediastreamer2-based software. However a direct API is available for those not using bcg729 with mediastreamer2.
bcg729 is dual licensed. It can be licensed and distributed:
ITU G729 Annex A/B were offically released October/November 1996 (https://www.itu.int/rec/T-REC-G.729), hence all patents covering these specifications shall have expired in November 2016.
Patent pool administrator confirmed most licensed patents under the G.729 Consortium have expired (http://www.sipro.com/G729.html).
Bcg729 source code can be downloaded from git as well:
git clone git://git.linphone.org/bcg729.git