FreeCalypso > hg > gsm-codec-lib
view doc/EFR-testing @ 282:9ee8ad3d4d30
frtest: rm gsmfr-hand-test and gsmfr-max-out utils
These hack programs were never properly documented and were written
only as part of a debug chase, in pursuit of a bug that ultimately
turned out to be in our then-hacky patch to osmo-bts-sysmo,
before beginning of proper patches in Osmocom. These hack programs
need to be dropped from the present sw package because they depend
on old libgsm, and we are eliminating that dependency.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 14 Apr 2024 05:44:47 +0000 |
parents | 1e8569000049 |
children |
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When it comes to codec libraries, testing for correctness is essential, and EFR is no exception. There is a set of EFR encoder and decoder test sequences published by ETSI in ts_100725v050200p0.zip (GSM 06.54), and our suite of tools includes gsmefr-etsi-enc and gsmefr-etsi-dec test programs that operate on the representation formats used by these test sequences. Because these test programs are based on libgsmefr EFR_encode_frame() and EFR_decode_frame() functions, seeing gsmefr-etsi-enc produce output that matches official ETSI *.cod files proves that libgsmefr encoder is correct, and seeing gsmefr-etsi-dec produce output that matches official ETSI *.out files proves that libgsmefr decoder is correct. For debugging, we also have gsmefr-cod-parse and gsmefr-dec-parse utilities that parse ETSI *.cod and *.dec file formats and dump their content in human-readable form similar to gsmrec-dump. Please note that all ETSI test sequence file formats are endian-dependent: their original programs read and write 16-bit words in the local machine's native byte order, and whenever you are working with published test sequence files, you have to check to see if they are BE or LE. Our gsmefr-etsi-{enc,dec} and gsmefr-{cod,dec}-parse programs support both byte orders; the default is LE (matching the main parts of ts_100725v050200p0.zip), or you can select BE with -b option.