Automatic generation of a header file using a C program built during
build of osmo-bts creates several problems when cross-compiling.
The generated header file is only 59 lines long, so let's have it
generated in order to avoid having to call the helper program every
time.
A Makefile target is added to easily regenerate the file manually in
case it's needed:
make -C contrib/ber/ update_codec_bit_class_h
Fixes: acf0f0f0bb
Change-Id: I97efdb4ee00537fcae191b4267d0211d582ef372
This implements RTP based GSM BER testing for osmo-bts, implementing
ideas described in https://osmocom.org/projects/osmobts/wiki/BER_Testing
In short: The command transmits a PRBS sequence encapsulated in RTP
frames, which are sent to the BTS, which transmits that data in the
(unimpaired) downlink. The mobile station receives the data and is
instructed to loop it back in the (possibly impaired) uplink. The BTS
receives that uplink, puts in in RTP frames which end up being received
back by this very tool. By correlating the received RTP with the PRBS
sequence, this tool can compute the BER (Bit Error Rate) of the
(possibly impaired) uplink. Doing this with different RF channel model
simulators in the uplink allows to establish BER at different levels and
channel conditions.
Original code by Sylvain Munaut extended with some comments and Automake
integration by Harald Welte.
Change-Id: I1cffa0ae959e29ec61775b13185fd1057ed7485a
Pau Espin
Sylvain Munaut