egd_get_numch(3) debian man page | unix.com

EGD_GET_NUMCH(3)					       EEGDEV library manual						  EGD_GET_NUMCH(3)

NAME
       egd_get_numch - Get the number of channels sampled by type

SYNOPSIS
       #include <eegdev.h>

       int egd_get_numch(const struct eegdev* dev, int stype);

DESCRIPTION
       egd_get_numch()	returns  the  number of channels of type stype sampled by the recording device referenced by dev. stype must be one of the
       values returned by egd_sensor_type(3).

RETURN VALUE
       In case of success, the function returns a non negative value corresponding to the number of channels of type  stype  (possibly	0  if  the
       device does not sample this type of data). Otherwise, -1 is returned and errno is set accordingly.

ERRORS
       egd_get_numch() will fail if:

       EINVAL dev is NULL or stype is not valid value.

SEE ALSO
       egd_get_cap(3), egd_sensor_type(3)

EPFL
								       2011							  EGD_GET_NUMCH(3)