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* tests: codec: ecu_fr: Add buffer with unequal XMAXC valuesPau Espin Pedrol2018-07-212-17/+47
| | | | | | | This buffer verifies that all XMAXC fields must be zero before the entire buffer is considered as silent by osmo_ecu_fr_conceal(). Change-Id: I14a192d001b5e167437cedbe76a1a3dd84dde35c
* tests: codec: ecu_fr: Print XMAXC fieldsPau Espin Pedrol2018-07-212-25/+54
| | | | | | | This makes it easy to debug how XMAXC fields are decreased every iteration in osmo_ecu_fr_conceal(). Change-Id: I678d4be5e0b15b05873b0d3bf5ea5bbee7bef839
* libosmocodec: implement ECU (Error Concealment Unit) for FRPhilipp Maier2018-01-152-0/+338
| | | | | | | | | | | When a bad GSM voice frame is received, it's being replaced by a silence frame. This may cause unpleasant audio effects. This change implements a functionality to craft a replacement frame from the last known good frame. Currently, only FR is supported, support for other codecs may be added latter. Change-Id: I06a21f60db01bfe1c2b838f93866fad1d53fdcd1
* Fix/Update copyright notices; Add SPDX annotationHarald Welte2017-11-131-4/+6
| | | | | | | | Let's fix some erroneous/accidential references to wrong license, update copyright information where applicable and introduce a SPDX-License-Identifier to all files. Change-Id: I39af26c6aaaf5c926966391f6565fc5936be21af
* 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>
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