[pulseaudio-discuss] [PATCH] [alsa] add rewind-safeguard parameter

[pl bossart]

This is a patch to fix rewind issues. It has the potential to break
audio in Linux, so I would really appreciate it if others could give
it a try and test on their systems. The new rewind_safeguard should be
tuned to the DMA burst size plus some headroom; I chose a default
value of 256 bytes but some exotic embedded hardware might require a
different setting. On my HDAudio test system, 128 bytes was already
more than enough to prevent audible noises.
Thanks for your feedback.
-Pierre
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