Bug#1025165: No opus transcoding available after asterisk install

[Faidon Liambotis]

Control: found -1 1:20.2.1~dfsg+~cs6.13.40431413-1
Control: tags -1 patch

On Wed, Nov 30, 2022 at 04:18:24PM +0100, IB Development Team wrote:
> Package: asterisk
> Version: 1:16.28.0~dfsg-0+deb10u1
> 
> In clean Debian 10 after
> 
>     apt-get install asterisk
> 
> internal opus codec seems to be available in 'core show codecs' but not in
> 'core show translation' and transcoding with opus does not work; same in
> Debian 11 and asterisk 1:16.28.0~dfsg-0+deb11u1.

I believe the reason is that codec_opus_open_source.so is not shipped,
due to it not being built.

Adding "ADDONS_ENABLE += codec_opus_open_source" to debian/rules (e.g.
near the other ADDONS_ENABLE lines) addresses this issue. I've verified
that "core show translation" shows opus in the matrix after that. I'm
not sure why menuselect doesn't enable it by default.

Separately, it looks like there is a patch (2015_opus.patch) to add
libopusenc detection, used conditionally -if found- by the module
format_ogg_opus_open_source. However, libopusenc-dev is not in
Build-Depends. I've verified that the (already patched) build system
picks it up if I add it, and shlibs etc. are added.

Thanks,
Faidon