[alsa-devel] a xrun() query

Hi,

I am getting glitches while playing audio with aplay. With little debugging I figured out that the state changes from RUNNING to XRUN at which time the trigger gets called. I also figured out that XRUN state is set in the function:

static int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream, struct snd_pcm_runtime *runtime) { <snip> } else { if (avail >= runtime->stop_threshold) { xrun(substream); return -EPIPE; } } </snip> }

I am not able to find out why the condition (avail > runtime->stop_threshold) becomes true. Can the experts here tell during what use cases/scenarios this happens?

Thanks, Santosh