lkml.org 
[lkml]   [2017]   [Mar]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v5 15/39] [media] v4l2: add a frame interval error event
From
Date
On 10/03/17 05:52, Steve Longerbeam wrote:
> Add a new FRAME_INTERVAL_ERROR event to signal that a video capture or
> output device has measured an interval between the reception or transmit
> completion of two consecutive frames of video that is outside the nominal
> frame interval by some tolerance value.

Reading back what was said on this I agree with Sakari that this doesn't
belong here.

Userspace can detect this just as easily (if not easier) with a timeout.

Regards,

Hans

>
> Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
> ---
> Documentation/media/uapi/v4l/vidioc-dqevent.rst | 6 ++++++
> Documentation/media/videodev2.h.rst.exceptions | 1 +
> include/uapi/linux/videodev2.h | 1 +
> 3 files changed, 8 insertions(+)
>
> diff --git a/Documentation/media/uapi/v4l/vidioc-dqevent.rst b/Documentation/media/uapi/v4l/vidioc-dqevent.rst
> index 8d663a7..dc77363 100644
> --- a/Documentation/media/uapi/v4l/vidioc-dqevent.rst
> +++ b/Documentation/media/uapi/v4l/vidioc-dqevent.rst
> @@ -197,6 +197,12 @@ call.
> the regions changes. This event has a struct
> :c:type:`v4l2_event_motion_det`
> associated with it.
> + * - ``V4L2_EVENT_FRAME_INTERVAL_ERROR``
> + - 7
> + - This event is triggered when the video capture or output device
> + has measured an interval between the reception or transmit
> + completion of two consecutive frames of video that is outside
> + the nominal frame interval by some tolerance value.
> * - ``V4L2_EVENT_PRIVATE_START``
> - 0x08000000
> - Base event number for driver-private events.
> diff --git a/Documentation/media/videodev2.h.rst.exceptions b/Documentation/media/videodev2.h.rst.exceptions
> index e11a0d0..c7d8fad 100644
> --- a/Documentation/media/videodev2.h.rst.exceptions
> +++ b/Documentation/media/videodev2.h.rst.exceptions
> @@ -459,6 +459,7 @@ replace define V4L2_EVENT_CTRL event-type
> replace define V4L2_EVENT_FRAME_SYNC event-type
> replace define V4L2_EVENT_SOURCE_CHANGE event-type
> replace define V4L2_EVENT_MOTION_DET event-type
> +replace define V4L2_EVENT_FRAME_INTERVAL_ERROR event-type
> replace define V4L2_EVENT_PRIVATE_START event-type
>
> replace define V4L2_EVENT_CTRL_CH_VALUE ctrl-changes-flags
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 45184a2..cf5a0d0 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -2131,6 +2131,7 @@ struct v4l2_streamparm {
> #define V4L2_EVENT_FRAME_SYNC 4
> #define V4L2_EVENT_SOURCE_CHANGE 5
> #define V4L2_EVENT_MOTION_DET 6
> +#define V4L2_EVENT_FRAME_INTERVAL_ERROR 7
> #define V4L2_EVENT_PRIVATE_START 0x08000000
>
> /* Payload for V4L2_EVENT_VSYNC */
>

\
 
 \ /
  Last update: 2017-03-10 13:05    [W:1.107 / U:1.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site