On Thu 18 July 2013 02:14:28 Laurent Pinchart wrote:
> Hi Hans,
>
> Thanks for the patch.
>
> On Friday 28 June 2013 14:27:33 Hans Verkuil wrote:
> > From: Hans Verkuil <hans.verk...@cisco.com>
> >
> > Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
> > ---
> > include/uapi/linux/videodev2.h | 17 +++++++++++++++++
> > 1 file changed, 17 insertions(+)
> >
> > diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> > index 5cbe815..f926209 100644
> > --- a/include/uapi/linux/videodev2.h
> > +++ b/include/uapi/linux/videodev2.h
> > @@ -1721,6 +1721,7 @@ struct v4l2_streamparm {
> > #define V4L2_EVENT_EOS 2
> > #define V4L2_EVENT_CTRL 3
> > #define V4L2_EVENT_FRAME_SYNC 4
> > +#define V4L2_EVENT_MOTION_DET 5
> > #define V4L2_EVENT_PRIVATE_START 0x08000000
> >
> > /* Payload for V4L2_EVENT_VSYNC */
> > @@ -1752,12 +1753,28 @@ struct v4l2_event_frame_sync {
> > __u32 frame_sequence;
> > };
> >
> > +#define V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ (1 << 0)
> > +
> > +/**
> > + * struct v4l2_event_motion_det - motion detection event
> > + * @flags: if V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ is set, then the
> > + * frame_sequence field is valid.
> > + * @frame_sequence: the frame sequence number associated with this
> > event.
> > + * @region_mask: which regions detected motion.
> > + */
> > +struct v4l2_event_motion_det {
> > + __u32 flags;
> > + __u32 frame_sequence;
> > + __u32 region_mask;
>
> Will a 32-bit region mask be extensible enough ? What about hardware that
> could report motion detection as a (possibly low resolution) binary image ?
I'm not sure whether we should be bothered about this. The struct can easily
be extended later.
Also, in your particular example I would actually expect that that would either
need support for 'large payload events', or you would call G_MATRIX to get that
image.
> > +};
> > +
> > struct v4l2_event {
> > __u32 type;
> > union {
> > struct v4l2_event_vsync vsync;
> > struct v4l2_event_ctrl ctrl;
> > struct v4l2_event_frame_sync frame_sync;
> > + struct v4l2_event_motion_det motion_det;
> > __u8 data[64];
> > } u;
> > __u32 pending;
>
Regards,
Hans
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