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* ecu_fr: increase test coverage for FR ECU implementationPhilipp Maier2019-09-202-0/+84
| | | | | | | | | | | | | The ECU implementation for FR is currently tested by calling the related functions directly and by using the generic ECU abstraction layer. However, the test "test_fr_concealment" only tests directly. Lets add a version that uses the generic ECU abstraction layer as well. The generic ECU abstraction layer obsolets the public API functions osmo_ecu_fr_reset() and osmo_ecu_fr_conceal(), lets tag those functions as dprecated. Change-Id: Ib0c8a9b164f14ea4fa00688f760a76cdb4890af4
* codec/ecu: Introduce new generic Error Concealment Unit abstractionHarald Welte2019-09-022-0/+223
| | | | | | | | | | | | | | | | | | | | We don't want to expose the details of a given ECU implementation to the user (e.g. osmo-bts), but have a generic abstraction layer where an ECU implementation can simply register a few call-back functions with the generic core. As the developer and copyright holder of the related code, I hereby state that any ECU implementation using 'struct osmo_ecu_ops' and registering with the 'osmo_ecu_register()' function shall not be considered as a derivative work under any applicable copyright law; the copyleft terms of GPLv2 shall hence not apply to any such ECU implementation. The intent of the above exception is to allow anyone to combine third party Error Concealment Unit implementations with libosmocore, including but not limited to such published by ETSI. Change-Id: I4d33c9c7c2d4c7462ff38a49c178b65accae1915
* 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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