Fills the info structure for an enumerated control
int snd_ctl_enum_info(struct snd_ctl_elem_info * info, unsigned int channels, unsigned int items, const char *const names[]);
info
the structure to be filled
channels
the number of the control's channels; often one
items
the number of control values; also the size of names
names[]
an array containing the names of all control values
Sets all required fields in info to their appropriate values. If the control's accessibility is not the default (readable and writable), the caller has to fill info->access.
Zero.