[alsa-devel] snd_pcm_hardware structure

James Courtier-Dutton james.dutton at gmail.com
Wed Jun 23 23:13:35 CEST 2010

On 23 June 2010 21:26, Adish Kuvelker <adkuvi at gmail.com> wrote:
> yes...I know that my hardware will generate the interrupt and it will
> be at FIFO being half empty.

In that case the full buffer is 64, but you have the following parameters:
.period_bytes_min = 4,
.period_bytes_max = 32,
.periods_min = 2,
.periods_max = 2

A period is how far through the buffer one goes until an interrupt happens.
So, if the interrupt happens one each half FIFO, one has two periods per buffer.

Kind Regards


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