Hi all, I've created an audiodev in uclinux for nios2 platform. Everything seems to work okay, except playing (or capturing) the media bit. In the audiodev I've created, I have a thread that does a play_cb, grab a frame and then get played out on the SoC audio device on my platform. I managed to set up a call using a simple PJSUA app to a remote end, and according to PJ_LOG, the call is confirmed and the stream starts. On my packet analyser, I can see RTP packets arriving at my platform at 20ms intervals. However, it seems that when the play_cb is called, and tries to get_frame from the conference bridge, I keep seeing this error: Master/sound Underflow, buf_cnt=0, will generate 1 frame Does this error means that nothing has been written to the circular buffer, which is why I am unable to play out the frames properly? At the moment I'm focussing only on trying to play the audio on my platform, so I guess this problem has nothing to do with my clock source? FYI, I'm using L16 codec, 8000KHz, 1 channel, and 16 bits per sample. And my audio device is set up to use these configurations too. No decoding is necessary for my case is that right? And it's just a matter of playing out the frames sent from the remote end on my audio dev? Hope someone here can help me understanding PJMEDIA, and hopefully the problem I'm currently facing. Thank you in advance. Regards, Chiang
