gsm-codec-lib-r5 release

[Mychaela Falconia]

Hello FreeCalypso and Themyscira community,

I am pleased to announce a new release of Themyscira Wireless GSM codec
libraries and utilities package:

https://www.freecalypso.org/pub/GSM/codecs/gsm-codec-lib-r5.tar.bz2
https://www.freecalypso.org/pub/GSM/codecs/gsm-codec-lib-latest.tar.bz2
(symlink)

The main change from the previous release (2024-10) is the addition of
libgsmhr1 for GSM-HR codec and the associated set of gsmhr-* command
line utilities.  Needless to say, GSM-HR (aka HRv1) is the least useful
of all GSM speech codecs in practice - however, this release was needed
for two reasons:

1) For a year and a half between 2024-10 and now, gsm-codec-lib Hg
repository contained incomplete libgsmhr1 and hrutil bits that weren't
release-ready.  This situation gummed up gsm-codec-lib release process
(you know how much I insist that downstream users use official point
releases rather than random Hg snapshots) and needed to be fixed.  The
present release finally gets us out of this mess - everything that is
in the Hg repository is now also included in an official release
tarball, with everything properly documented, brought up to release
quality, and SemVer strictly followed for libraries.

2) TFO transform is defined for FR, HR and EFR codecs.  An implementation
of this transform for plain FR codec appeared in the previous release
and is currently used by tw-e1abis-mgw, while the present release adds
TFO transform for HR to the supported set.  Once again HRv1 codec is
not really interesting in itself, but TFO transform implementation for
HR paves the way for the much more important one for EFR.

With this codec library release out of the way, I am now switching my
attention to Nokia Flexi Multiradio BTS.  It is a large BTS (macrocell)
with both E1 and IP interface options, and it physically consists of
separate system and radio modules interconnected with a patch of fiber,
using some proprietary 3 Gbit/s or 6 Gbit/s SFPs.  (I already have the
SFPs, but I haven't examined them in detail beyond noting that their
advertised speeds aren't anything from the more familiar Ethernet
world.)  The system module is already in my lab, already powered up
and responding to ping on the management interface (bring-up of the
required proprietary management sw is next); a compatible radio module
for PCS1900 band is expected to arrive next week.

Hasta la Victoria, Siempre,
Mychaela aka The Mother