SYNOPSIS

bool vb2_fileio_is_active(struct vb2_queue * q);

ARGUMENTS

q

videobuf queue

DESCRIPTION

This returns true if read or write is used to stream the data as opposed to stream I/O. This is almost never an important distinction, except in rare cases. One such case is that using read or write to stream a format using V4L2_FIELD_ALTERNATE is not allowed since there is no way you can pass the field information of each buffer to/from userspace. A driver that supports this field format should check for this in the queue_setup op and reject it if this function returns true.

COPYRIGHT