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* Fix wrongful GSM FR codec SID frame detection in DTX.Jean-Francois Dionne2017-06-091-0/+17
| | | | | | | | Based on ETSI TS 101 318 section 5.1.2 the 95 bits SID code word is not detected correctly due to a wrongful offset in the bits location indexes. Change-Id: I45d98c6edf267f313883503a65385190ffbc65ca
* introduce proper test case for GSM FR detectionHarald Welte2017-06-091-0/+97
| | | | | | | our code is actually wrong, so let's skip the test until the fix is applied in a follow-up patch. Change-Id: I710c7871f959671deb3d18ab9062588f3056fd7c
* DTX: fix AMR SID-FIRST detectionJean-Francois Dionne2017-01-101-2/+2
| | | | | | | Max's note: adjusted test output. Change-Id: I46477c631bf86345cb757f31d7f2e2935b12adcc Related: OS#1801
* Add null-pointer check to osmo_amr_rtp_dec()Max2016-11-071-3/+9
| | | | | | | Check that RTP payload we're about to decode is not NULL and return proper error code instead of segfaulting. Add corresponding test case. Change-Id: Ib6cda9900a41ed16bbfbde9df3de9d38e0a7469b
* Add functions to detect HR/FR SID framesMax2016-06-012-0/+34
| | | | | | | | | | | Add functions which check if given FR or HR frame (packed in RTP) contains SID (SIlence Descriptor) and corresponding tests. Related: OS#22 Change-Id: I4051e3c0d4fb9ee93d7e9e0ef4abaf9f18e227ca Reviewed-on: https://gerrit.osmocom.org/160 Tested-by: Jenkins Builder Reviewed-by: Harald Welte <laforge@gnumonks.org>
* Add helper functions for AMR codecMax2016-05-312-0/+95
* add functions to encode/decode various codec paramters from RTP payload with AMR frame according to RFC 4867 * those functions are extended version based on code from osmo-bts' amr.c by Andreas Eversberg * add corresponding enum types and strings for logging * add regression tests It's useful both to replace manual parsing in osmo-bts with fuctions covered by test suite and as a debugging helpers for issues related to AMR. Change-Id: Ia217679a07d3fbc970f435e20f6eac33d34bd597 Related: OS#1562 Reviewed-on: https://gerrit.osmocom.org/118 Tested-by: Jenkins Builder Reviewed-by: Holger Freyther <holger@freyther.de>