about V4L2's ioctl : VIDIOC_CROPCAP VIDIOC_S_CROP

Autonomous Machines Jetson & Embedded Systems Jetson TX2
#1

Hi:
at the struct tegra_channel_ioctl_ops which in the channel.c . I can’t found the value of .vidioc_s_crop , also the value of .vidioc_g_selection , .vidioc_g_crop .
Does it means : I can’t use V4L2’s ioctl VIDIOC_CROPCAP ,VIDIOC_S_CROP , VIDIOC_G_CROP?
version of my jetPack is 2.3.1 .

#2

hello XuXiang,

may I have confirmation that you would like to crop the sources to produce smaller result images.
could you please upgrade your work to our latest JetPack release, thanks

Jetson AGX restriction on video resolutions
#3

hello Jerry:

  I upgraded my jetPack to 3.3, and use sources_sync.sh to upgrade my kernel to tegra-l4t-r28.2.1 .

  but I can't found the .vidioc_s_crop ,  .vidioc_g_crop in the channel.c (kernel/kernel-4.4/drivers

/media/platform/tegra/camera/vi/) .

static const struct v4l2_ioctl_ops tegra_channel_ioctl_ops = {
	.vidioc_querycap		= tegra_channel_querycap,
	.vidioc_enum_framesizes		= tegra_channel_enum_framesizes,
	.vidioc_enum_frameintervals	= tegra_channel_enum_frameintervals,
	.vidioc_enum_fmt_vid_cap	= tegra_channel_enum_format,
	.vidioc_g_fmt_vid_cap		= tegra_channel_get_format,
	.vidioc_s_fmt_vid_cap		= tegra_channel_set_format,
	.vidioc_try_fmt_vid_cap		= tegra_channel_try_format,
	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
	.vidioc_querybuf		= vb2_ioctl_querybuf,
	.vidioc_qbuf			= vb2_ioctl_qbuf,
	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
	.vidioc_expbuf			= vb2_ioctl_expbuf,
	.vidioc_streamon		= vb2_ioctl_streamon,
	.vidioc_streamoff		= vb2_ioctl_streamoff,
	.vidioc_g_edid			= tegra_channel_g_edid,
	.vidioc_s_edid			= tegra_channel_s_edid,
	.vidioc_s_dv_timings		= tegra_channel_s_dv_timings,
	.vidioc_g_dv_timings		= tegra_channel_g_dv_timings,
	.vidioc_query_dv_timings	= tegra_channel_query_dv_timings,
	.vidioc_enum_dv_timings		= tegra_channel_enum_dv_timings,
	.vidioc_dv_timings_cap		= tegra_channel_dv_timings_cap,
	.vidioc_subscribe_event		= tegra_channel_subscribe_event,
	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
	.vidioc_enum_input		= tegra_channel_enum_input,
	.vidioc_g_input			= tegra_channel_g_input,
	.vidioc_s_input			= tegra_channel_s_input,
	.vidioc_log_status		= tegra_channel_log_status,
};

Waiting for your good news ,thanks.

#4

hello XuXiang,

it’s standard v4l2 control, you may have implementation by yourself.
may I have your description of the use-case that you would like to crop the sources from low-level side?
you could use the nvvidconv for an alternative way,
for example.

gst-launch-1.0 nvcamerasrc sensor-id=0 ! 'video/x-raw(memory:NVMM),width=2592, height=1944, framerate=30/1, format=NV12' ! nvvidconv ! 'video/x-raw(memory:NVMM), width=1920,height=1080,format=(string)NV12' ! nvoverlaysink -ev
#5

hello jerry:

  yes,we use VIDIOC_S_CROP to crop the image.

  I will send the messgae about nvcamerasrc to  our application software engineer ,thanks.
#6