[pulseaudio-discuss] alsa-sink: snd_pcm_avail() returns a huge value...but not alsa's bug

Pierre-Louis Bossart pierre-louis.bossart at linux.intel.com
Mon Aug 22 08:20:32 PDT 2011

> 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.

This code is meant to handle wrap-around cases. This can take a lot of
time...If you are seeing this issue, it's more likely than the hw_ptr has
not been updated correctly by the low-level driver/firmware and you see an
underrun condition.

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