Man page 9 : snd_interval_list

snd_interval_list - refine the interval value from the list

int snd_interval_list(struct snd_interval *  i , unsigned int  count , const unsigned int *  list , unsigned int  mask );

i
    the interval value to refine

count
    the number of elements in the list

list
    the value list

mask
    the bit-mask to evaluate

Refines the interval value from the list. When mask is non-zero, only the elements corresponding to bit 1 are evaluated.

Positive if the value is changed, zero if itAqs not changed, or a negative error code.