Hi Hans,
Thanks for the review.
>
> These functions are not usually present when capturing from video. You don't
> have a choice w.r.t. resolution and fps, since that's determined by the
> incoming video. I would drop support for this.
Just to confirm, do you mean `npcm_video_enum_framesizes` and
`npcm_video_enum_frameintervals` functions?
> > + switch (ctrl->id) {
> > + case V4L2_CID_DETECT_MD_MODE:
> > + if (ctrl->val == V4L2_DETECT_MD_MODE_GLOBAL)
> > + video->ctrl_cmd = VCD_CMD_OPERATION_CAPTURE;
> > + else
> > + video->ctrl_cmd = VCD_CMD_OPERATION_COMPARE;
> > + break;
>
> Incorrect indentation for the 'break'.
Will correct it.
> > + v4l2_ctrl_new_std_menu(&video->ctrl_handler, &npcm_video_ctrl_ops,
> > + V4L2_CID_DETECT_MD_MODE,
> > + V4L2_DETECT_MD_MODE_REGION_GRID, 0,
> > + V4L2_DETECT_MD_MODE_GLOBAL);
>
> Why is this driver using a control designed for motion detection devices?
> That seems odd, and it looks like you are abusing this control to do something
> else.
The Video Capture/Differentiation (VCD) engine supports two modes:
- COMPLETE (capture the next "complete frame" into memory)
- DIFF (compare the incoming frame with the frame stored in memory,
and updates the "diff frame" in memory)
The purpose here is to provide a way for application to switch the
COMPLETE/DIFF mode. Since I couldn't find an appropriate ioctl that is
designed for this purpose, so I used VIDIOC_S_CTRL with control values
of V4L2_DETECT_MD_MODE_GLOBAL (for COMPLETE) and
V4L2_DETECT_MD_MODE_REGION_GRID (for DIFF). It would be appreciated if
you could point me in the right direction.
> When you post v7, please also include the output of v4l2-compliance to the
> cover letter!
> Make sure you compile v4l2-compliance from the v4l-utils git repo, do not
> use a version from a distro, that will be too old.
OK, I'll try to compile v4l2-compliance and include the output.
Regards,
Marvin
