Re: [PATCH v2 2/3] v4l2-ctl: Support V4L2_CTRL_TYPE_RECT

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Hi Laurent,

On 2024/10/31 17:34, Laurent Pinchart wrote:
On Thu, Oct 31, 2024 at 05:19:02PM +0800, Ming Qian(OSS) wrote:
On 2024/10/30 17:19, Hans Verkuil wrote:
On 30/10/2024 10:03, Laurent Pinchart wrote:
On Wed, Oct 30, 2024 at 11:43:06AM +0900, ming.qian@xxxxxxxxxxx wrote:
From: Yunke Cao <yunkec@xxxxxxxxxx>

Tested with VIVID

   ./v4l2-ctl -C rect -d 0
rect: 300x400@200x100

   ./v4l2-ctl -c rect=1000x2000@0x0
   ./v4l2-ctl -C rect -d 0
rect: 1000x2000@0x0

Signed-off-by: Yunke Cao <yunkec@xxxxxxxxxx>
Signed-off-by: Ming Qian <ming.qian@xxxxxxxxxxx>
---
   utils/v4l2-ctl/v4l2-ctl-common.cpp | 12 ++++++++++++
   1 file changed, 12 insertions(+)

diff --git a/utils/v4l2-ctl/v4l2-ctl-common.cpp b/utils/v4l2-ctl/v4l2-ctl-common.cpp
index 40667575fcc7..538e1951cf81 100644
--- a/utils/v4l2-ctl/v4l2-ctl-common.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl-common.cpp
@@ -614,6 +614,10 @@ static void print_value(int fd, const v4l2_query_ext_ctrl &qc, const v4l2_ext_co
   		case V4L2_CTRL_TYPE_AREA:
   			printf("%dx%d", ctrl.p_area->width, ctrl.p_area->height);
   			break;
+		case V4L2_CTRL_TYPE_RECT:
+			printf("%ux%u@%dx%d", ctrl.p_rect->width, ctrl.p_rect->height,

I find this notation ambiguous, it's not immediately clear when reading
10x10@20x20 if we're looking at a 10x10 rectangle positioned at (20,20)
or the other way around. media-ctl use (20,20)/10x10 which I think would
be a better notation.

Good point, I agree.

Ming Qian, can you also update patch 1/4 of the kernel patch series to
use the same formatting when logging the V4L2_CTRL_TYPE_RECT value?

Regards,

	Hans

There is a issue in v4l2-utils, that ',' is the ending flag in
v4l_getsubopt(), then I can't set the rect control,
for example:

$v4l2-ctl -d 0 -c rect="(0,0)/1000x2000"
control '0)/1000x2000' without '='

The should be fixable in v4l_getsubopt().


I can see the following comments of v4l_getsubopt(),

   Parse comma separated suboption from *OPTIONP and match against
   strings in TOKENS.

I am not sure if we can change it.

Thanks,
Ming

+			       ctrl.p_rect->left, ctrl.p_rect->top);
+			break;
   		default:
   			printf("unsupported payload type");
   			break;
@@ -702,6 +706,9 @@ static void print_qctrl(int fd, const v4l2_query_ext_ctrl &qc,
   	case V4L2_CTRL_TYPE_AREA:
   		printf("%31s %#8.8x (area)   :", s.c_str(), qc.id);
   		break;
+	case V4L2_CTRL_TYPE_RECT:
+		printf("%31s %#8.8x (rect)   :", s.c_str(), qc.id);
+		break;
   	case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
   		printf("%31s %#8.8x (hdr10-cll-info):", s.c_str(), qc.id);
   		break;
@@ -1279,6 +1286,11 @@ void common_set(cv4l_fd &_fd)
   					sscanf(set_ctrl.second.c_str(), "%ux%u",
   					       &ctrl.p_area->width, &ctrl.p_area->height);
   					break;
+				case V4L2_CTRL_TYPE_RECT:
+					sscanf(set_ctrl.second.c_str(), "%ux%u@%dx%d",
+					       &ctrl.p_rect->width, &ctrl.p_rect->height,
+					       &ctrl.p_rect->left, &ctrl.p_rect->top);
+					break;
   				default:
   					fprintf(stderr, "%s: unsupported payload type\n",
   							qc.name);





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