Hi ,

snd_usb_hardware is defined in sound/usb/pcm.c as : static struct snd_pcm_hardware snd_usb_hardware = { ..... .buffer_bytes_max = 1024 * 1024, .period_bytes_min = 64, .period_bytes_max = 512 * 1024, .periods_min = 2, .periods_max = 1024, };

here periods_max is intialized with value = 1024 .

but going by buffer_bytes_max and period_bytes_min value defined above , periods_max = ( buffer_bytes_max / period_bytes_min ) = 16384 .

why this upper cap of 1024 is maintained for periods_max even though from calculation it comes as 16384 ?

Thanx & Regards Amit Nagal