tree eeb564a25341111f1c7d6e92137e910c4e4d37f3
parent ab892bac8438c5c2ff09a60d765d9b0c14941ba9
author Hans Verkuil <hans.verkuil@cisco.com> 1307456024 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> 1311800000 -0300

[media] v4l2-ctrls: add control events

Whenever a control changes value or state an event is sent to anyone
that subscribed to it.

This functionality is useful for control panels but also for applications
that need to wait for (usually status) controls to change value.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>