From 9fc83ac5442688cceb7d1b6ffe2be1bd2a077daf Mon Sep 17 00:00:00 2001
From: Maksim Shabunin <maksim.shabunin@gmail.com>
Date: Tue, 1 Aug 2023 14:11:14 +0300
Subject: [PATCH] videoio: fix V4L compilation for older kernels

---
 modules/videoio/src/cap_v4l.cpp    | 4 ++++
 modules/videoio/test/test_v4l2.cpp | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/modules/videoio/src/cap_v4l.cpp b/modules/videoio/src/cap_v4l.cpp
index e3c53d7cdd..905c79e42f 100644
--- a/modules/videoio/src/cap_v4l.cpp
+++ b/modules/videoio/src/cap_v4l.cpp
@@ -260,6 +260,10 @@ typedef uint32_t __u32;
 #define V4L2_CID_IRIS_ABSOLUTE (V4L2_CID_CAMERA_CLASS_BASE+17)
 #endif
 
+#ifndef v4l2_fourcc_be
+#define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1U << 31))
+#endif
+
 #ifndef V4L2_PIX_FMT_Y10
 #define V4L2_PIX_FMT_Y10 v4l2_fourcc('Y', '1', '0', ' ')
 #endif
diff --git a/modules/videoio/test/test_v4l2.cpp b/modules/videoio/test/test_v4l2.cpp
index 5d56ac097c..1c4917bfca 100644
--- a/modules/videoio/test/test_v4l2.cpp
+++ b/modules/videoio/test/test_v4l2.cpp
@@ -22,6 +22,9 @@
 #include <linux/videodev2.h>
 
 // workarounds for older versions
+#ifndef v4l2_fourcc_be
+#define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1U << 31))
+#endif
 #ifndef V4L2_PIX_FMT_Y10
 #define V4L2_PIX_FMT_Y10 v4l2_fourcc('Y', '1', '0', ' ')
 #endif