Hi all,
i see there's message like "snd_pcm_avail() returned a value that's
is exceptionally large...", and pulseaudio regard that as ALsa's bug.
Take playback as example, i checked the code in alsa kernel, the code
looks like:
/*
* result is: 0 ... (boundary - 1)
*/
static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct
snd_pcm_runtime *runtime)
{
snd_pcm_sframes_t avail = runtime->status->hw_ptr +
runtime->buffer_size - runtime->control->appl_ptr;
if (avail < 0)
avail += runtime->boundary;
else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
avail -= runtime->boundary;
return avail;
}
the boundary variable is initialized as a huge value, hence the logic
becomes, when appl_ptr goes ahead hw_ptr more than buffer_size, there
will hit the issue, the return value becomes huge.
--xingchao
