V4L2: Add V4L2_PIX_FMT_Y10 (10 bit grey) support

modules/videoio/src/cap_v4l.cpp

@@ -496,7 +496,8 @@ bool CvCaptureCAM_V4L::autosetup_capture_mode_v4l2()
             V4L2_PIX_FMT_JPEG,
 #endif
             V4L2_PIX_FMT_Y16,
-            V4L2_PIX_FMT_GREY
+            V4L2_PIX_FMT_Y10,
+            V4L2_PIX_FMT_GREY,
     };
 
     for (size_t i = 0; i < sizeof(try_order) / sizeof(__u32); i++) {
@@ -543,6 +544,7 @@ bool CvCaptureCAM_V4L::convertableToRgb() const
     case V4L2_PIX_FMT_SGBRG8:
     case V4L2_PIX_FMT_RGB24:
     case V4L2_PIX_FMT_Y16:
+    case V4L2_PIX_FMT_Y10:
     case V4L2_PIX_FMT_GREY:
     case V4L2_PIX_FMT_BGR24:
         return true;
@@ -577,6 +579,7 @@ void CvCaptureCAM_V4L::v4l2_create_frame()
             size.height = size.height * 3 / 2; // "1.5" channels
             break;
         case V4L2_PIX_FMT_Y16:
+        case V4L2_PIX_FMT_Y10:
             depth = IPL_DEPTH_16U;
             /* fallthru */
         case V4L2_PIX_FMT_GREY:
@@ -1451,6 +1454,13 @@ void CvCaptureCAM_V4L::convertToRgb(const Buffer &currentBuffer)
         cv::cvtColor(temp, destination, COLOR_GRAY2BGR);
         return;
     }
+    case V4L2_PIX_FMT_Y10:
+    {
+        cv::Mat temp(imageSize, CV_8UC1, buffers[MAX_V4L_BUFFERS].start);
+        cv::Mat(imageSize, CV_16UC1, currentBuffer.start).convertTo(temp, CV_8U, 1.0 / 4);
+        cv::cvtColor(temp, destination, COLOR_GRAY2BGR);
+        return;
+    }
     case V4L2_PIX_FMT_GREY:
         cv::cvtColor(cv::Mat(imageSize, CV_8UC1, currentBuffer.start), destination, COLOR_GRAY2BGR);
         break;