[alsa-devel] [PATCH 3/4] ALSA: usb-audio: parse UAC2 sample rate ranges correctly

Clemens Ladisch clemens at ladisch.de
Fri Jun 11 17:14:57 CEST 2010

Daniel Mack wrote:
> On Fri, Jun 11, 2010 at 10:59:44PM +0800, Alex Lee wrote:
> > If the device has a variable clock, it may report a RES of only 1.  So you
> > may end up with thousands (and even millions) of sample rates.  It might be
> > better to have separate code to cater to discrete clocks vs variable clocks.
> AFAIK, ALSA can[...] cope with that [...]. Am I right?

Yes; set fp->rates to SNDRV_PCM_RATE_CONTINUOUS to allow all rates between
fp->rate_min and fp->rate_max.  See, for example, parse_audio_format_rates_v1.


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