13 Feb
2013
13 Feb
'13
6 p.m.
В Срд, 13/02/2013 в 07:02 +0000, Peter Olsson пишет:
I wouldn't worry too much about spikes of 200usec, do you have an actual problem with audio quality?
/Peter Yes, I experienced problems with audio quality. I use mod_gsmopen, it work with hardware GSM modems via USB bus, and using timers in channel_read_frame() function. If work on reading of PCM frame will be done too late, this frame may be dropped, if too early - CNG frame may be generated. Adding a buffer increases the already large audio delay. It seems I resolved this problem by switching to realtime kernel, adding Flush() function to libctb serial library, and patching mod_gsmopen AUDIO_SYNC accordingly.