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Author SHA1 Message Date
Pau Espin 421068e643 tests: codec: ecu_fr: Add buffer with unequal XMAXC values 
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
 2018-07-21 07:40:20 +00:00
Pau Espin bbccca60d6 tests: codec: ecu_fr: Print XMAXC fields 
This makes it easy to debug how XMAXC fields are decreased every
iteration in osmo_ecu_fr_conceal().

Change-Id: I678d4be5e0b15b05873b0d3bf5ea5bbee7bef839
 2018-07-21 07:40:20 +00:00
Philipp Maier 40def49ac4 libosmocodec: implement ECU (Error Concealment Unit) for FR 
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
 2018-01-15 20:12:03 +00:00
Harald Welte e08da97570 Fix/Update copyright notices; Add SPDX annotation 
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
 2017-11-13 01:35:12 +09:00
Jean-Francois Dionne 43058efa93 Fix wrongful GSM FR codec SID frame detection in DTX. 
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
 2017-06-09 08:14:18 +00:00
Harald Welte 3851e8ea7a introduce proper test case for GSM FR detection 
our code is actually wrong, so let's skip the test until the fix is
applied in a follow-up patch.

Change-Id: I710c7871f959671deb3d18ab9062588f3056fd7c
 2017-06-09 08:10:03 +00:00
Jean-Francois Dionne d02c8af6cc DTX: fix AMR SID-FIRST detection 
Max's note: adjusted test output.

Change-Id: I46477c631bf86345cb757f31d7f2e2935b12adcc
Related: OS#1801
 2017-01-10 23:28:12 +00:00
Max e9e5f8e4e9 Add null-pointer check to osmo_amr_rtp_dec() 
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
 2016-11-07 15:19:47 +01:00
Max ec8f192fec Add functions to detect HR/FR SID frames 
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>
 2016-06-01 10:44:06 +00:00
Max 92db150488 Add helper functions for AMR codec 
* 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>
 2016-05-31 10:11:51 +00:00