[alsa-devel] Discarding the first few frames inside the kernel

[Ankhit Vivekananda]

Hello Takashi,

Thank you very much for the explanation.

Regards,
Ankhit

On Wed, Jan 20, 2016 at 8:18 PM, Takashi Sakamoto <o-takashi at sakamocchi.jp>
wrote:

> Hi,
>
> On Jan 21 2016 02:24, Ankhit Vivekananda wrote:
>
>> I am not sure as to how the wait for 4.5ms can be applied there?
>>
>
> I think you asked about the way to achieve the idea.
>
> Call kernel's process scheduler in the .prepare() implementation of your
> driver. For example, msleep() in <linux/delay.h> (More geneous logic is
> preferrable, I think.)
>
> Don't do this in .trigger() implementation, because this can be called in
> interrupt context, or between spin_lock_irqsave()/spin_lock_irqstore() in
> process context.
>
> Alternatively, does calling snd_pcm_format_set_silence(), be a safe
>> method to silence the first few samples coming out of the buffer?
>>
>
> I don't know exactly because I have no supplemental information about your
> driver and hardware design.
>
>
> Regards
>
> Takashi Sakamoto
>