[alsa-devel] [PATCH] ALSA: hda - Apply codec delay to wallclock.

Pierre-Louis Bossart pierre-louis.bossart at linux.intel.com
Tue Apr 9 01:37:03 CEST 2013

> Of course you're right.  That's annoying, it will have to convert from
> ms to frames (in get_delay) then to ns here.  Converting from frames
> to ns here is a better idea, but for this particular codec, all I have
> is ms resolution.

This is odd, looks completely arbitrary...

> Pierre,
> What should the capture timestamp represent?  When the sample hits the
> A-to-D or when it is read out of the buffer?

When the samples hit A-to-D, as close as possible to the input (or the 
serial link if the codec doesn't report delay)

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