[asterisk-dev] EVS codec for Asterisk 16

[Michael Maier]

Hello!

Alexander Traud provided patches for Asterisk 13 for the EVS codec[1]. Those patches can be applied to Asterisk 16, too. I attached a tar file, which contains all patches from
Alexander in one file and a spec file for building the evs codec library from www.etsi.org (tested on CentOS 7).

At first, you have to build the lib3gpp-evs library with
rpmbuild -ba lib3gpp-evs.spec

This creates 4 packages: a src, a devel and the library package itself and the corresponding debuginfo package.
On the machine, you are building Asterisk at next, you have to install the library and the devel package. On the machine Asterisk runs, you only need the library package.

To build Asterisk, you have to apply the evs-asterisk.16.patch (which contains all changes necessary in one patch file as described at [1] - the patch here wants to have this
patch[2] already applied before). Any further information how to build Asterisk after the patch file has been applied can be found here[1].

If all went fine, there are at the end two more modules in /usr/lib64/asterisk/modules:
codec_evs.so
res_format_attr_evs.so

After restarting of Asterisk, you can check if everything went fine by:

asterisk -r
core show codecs
(-> evs must be part of the list)

core show translation
(evs must be part of the list)

After adding the codec to be allowed for a trunk, you may test it - I couldn't test it so far, because I didn't have any device using the evs codec.


Thanks
Michael


[1] https://github.com/traud/asterisk-evs
[2] https://www.mail-archive.com/asterisk-dev@lists.digium.com/msg45213.html
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