Hi,
I tried to add simple AMR support in osmocombb
project. I tested it with C123 (DSP API v 36). I set AMR config from assigment command,
set AMR detection thresholds, make sync, etc.
It looks like downlink works fine, but I have problem with uplink: it send data directly
from microphone and ignore data in dsp_api.ndb->a_du_1 even if I set
dsp_api.ndb->d_tch_mode|=B_PLAY_UL. Also, I can see uplink data on
dsp_api.ndb->a_du_0 like B_PLAY_UL is fully ignored.
Did anyone have that issue before? I know that AMR codec is more complex that TCH, but
did someone know a way to send custom data from host using AMR codec?
TBH I'm not sure anyone tried AMR at all ...
Can you post the diff you're using atm ?
AFAIK The v36 DSP has buggy AMR support and the normal firmware loads
some DSP patches to make it work properly.
Cheers,
Sylvain