[alsa-devel] snd-usb-audio: minimum period time as module option?
kls.schlz at googlemail.com
Mon Nov 17 20:23:06 CET 2008
On Mon, Nov 17, 2008 at 8:21 PM, Klaus Schulz <kls.schlz at googlemail.com>wrote:
> Hi folks (probably Clemens).
> Would it be possible to to introduce a module-option variable to
> snd-usb-audio, so that it is possible to switch
> minimum period from outside
> /* set the period time minimum 1ms */
> /* FIXME: high-speed mode allows 125us minimum period, but many parts
> * in the current code assume the 1ms period.
> snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
> 1000 * MIN_PACKS_URB,
> /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
> With 125us my EMU USB 0404 and also my PCM2707 devices do sound better.
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