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[media] v4l2-ctrls: always send an event if a control changed implicitly

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By default no control events are sent to the application that caused the
control value or flags change (i.e. the control(s) passed to VIDIOC_S_CTRL
or VIDIOC_S_EXT_CTRLS). But if a change in one control causes a change in
another control that was not part of the control(s) in VIDIOC_S_CTRL or
S_EXT_CTRLS, then the application should be notified.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2011-07-05 07:09:26 -03:00 • committed by Mauro Carvalho Chehab
parent adf41b9bc3
commit 639884a6d9
1 changed files with 6 additions and 1 deletions
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7
drivers/media/video/v4l2-ctrls.c
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@ -712,11 +712,16 @@ static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
if (!is_cur_manual(ctrl->cluster[0])) if (!is_cur_manual(ctrl->cluster[0]))
ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
} }
if (changed || update_inactive) if (changed || update_inactive) {
/* If a control was changed that was not one of the controls
modified by the application, then send the event to all. */
if (!ctrl->is_new)
fh = NULL;
send_event(fh, ctrl, send_event(fh, ctrl,
(changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) |
(update_inactive ? V4L2_EVENT_CTRL_CH_FLAGS : 0)); (update_inactive ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
} }
}
/* Copy the current value to the new value */ /* Copy the current value to the new value */
static void cur_to_new(struct v4l2_ctrl *ctrl) static void cur_to_new(struct v4l2_ctrl *ctrl)