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* libosmocodec: implement ECU (Error Concealment Unit) for FRPhilipp Maier2018-01-151-0/+15
| | | | | | | | | | | 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
* libosmocodec: add FR bit offset definitionsPhilipp Maier2017-12-201-0/+272
| | | | | | | | This change defines the GSM FR bit positions as described in RFC 3551, which will be used by further ECU (Error Correction Unit) implementation. Change-Id: I1d0a198af0f8dd1f690b5a81f5c9eb92c43aefed
* libosmocodec: add FR/HR/EFR frame length definitionsVadim Yanitskiy2017-12-201-0/+7
| | | | | | | | | There are some projects, such as OsmoBTS and OsmocomBB, which are dealing with raw TCH payloads, so they need to have the FR/HR/EFR frame length defined. At the moment, each project defines them itself. Let's share these definitions. Change-Id: Ib19dd1bf81712d034157f9ce061008be0000ef38
* doxygen: unify use of \file across the boardNeels Hofmeyr2017-06-231-0/+2
| | | | | | | | | | | | | | | | | Considering the various styles and implications found in the sources, edit scores of files to follow the same API doc guidelines around the doxygen grouping and the \file tag. Many files now show a short description in the generated API doc that was so far only available as C comment. The guidelines and reasoning behind it is documented at https://osmocom.org/projects/cellular-infrastructure/wiki/Guidelines_for_API_documentation In some instances, remove file comments and add to the corresponding group instead, to be shared among several files (e.g. bitvec). Change-Id: Ifa70e77e90462b5eb2b0457c70fd25275910c72b
* doxygen: enable AUTOBRIEF, drop \briefNeels Hofmeyr2017-06-231-1/+1
| | | | | | | | | | Especially for short descriptions, it is annoying to have to type \brief for every single API doc. Drop all \brief and enable the AUTOBRIEF feature of doxygen, which always takes the first sentence of an API doc as the brief description. Change-Id: I11a8a821b065a128108641a2a63fb5a2b1916e87
* osmo_{fr,hr}_check_sid(): Use const input argumentHarald Welte2017-06-091-2/+2
| | | | Change-Id: If779cce63f06a18d4f3b0cb3d6dd7a99aa52a646
* Mark inline header function as staticMax2016-09-301-1/+1
| | | | Change-Id: Ib751f7467d54cbcae76f72448a38e30f2ecc63d4
* AMR: add function to check speech framesMax2016-09-281-0/+21
| | | | | | | | Add convenience function osmo_amr_is_speech() to check if given AMR frame is speech frame: non-speech frames often require special processing. Change-Id: Ifaab02a2f581acc302b367d34fd2fc28a4d1e2e3
* Add functions to detect HR/FR SID framesMax2016-06-011-0/+3
| | | | | | | | | | | 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 codecMax2016-05-311-0/+31
| | | | | | | | | | | | | | | | | | | * 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>
* include: Switch to #pragma once patternSylvain Munaut2014-06-161-4/+1
| | | | Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
* codec: make data tables constant.Diego Elio Pettenò2012-06-301-12/+12
| | | | | | | | When declaring them constant, they are written on the .rodata section instead of .data, which means that they can be mapped directly from disk to memory. Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.eu>
* build: simplify headers management and remove recursionDiego Elio Pettenò2012-06-301-3/+0
| | | | | | | | | | | | There is no real reason to keep the include directory a multi-level recursion, so instead declare everything within include (so that we can use proper nobase_ declarations) and be it. Please note that since we removed the sub-Makefile.am, ./configure will not create the directory structure for us on out-of-tree builds, so we have to make sure the directory we're generating to exists first. Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.eu>
* codec: Fix bit order table definition for GSM HRSylvain Munaut2010-10-241-1/+2
| | | | | | There is two tables: one for unvoiced frames and one for voiced frames. Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
* codec: Add the missing bits for include to install and pkgconfig to workSylvain Munaut2010-10-241-0/+3
| | | | Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
* codec: Add bit ordering tables from specs for HR,FR,EFR & AMRSylvain Munaut2010-10-151-0/+19
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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