depot/third_party/nixpkgs/pkgs/os-specific/linux/v4l2-relayd/upstream-v4l2loopback-compatibility.patch

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diff --git a/src/v4l2-relayd.c b/src/v4l2-relayd.c
index 21bb0d5..cfc9e27 100644
--- a/src/v4l2-relayd.c
+++ b/src/v4l2-relayd.c
@@ -27,7 +27,10 @@
#include <gst/app/gstappsrc.h>
#include <gst/video/video-info.h>
-#define V4L2_EVENT_PRI_CLIENT_USAGE V4L2_EVENT_PRIVATE_START
+#define V4L2LOOPBACK_EVENT_BASE (V4L2_EVENT_PRIVATE_START)
+#define V4L2LOOPBACK_EVENT_OFFSET 0x08E00000
+#define V4L2_EVENT_PRI_CLIENT_USAGE \
+ (V4L2LOOPBACK_EVENT_BASE + V4L2LOOPBACK_EVENT_OFFSET + 1)
struct v4l2_event_client_usage {
__u32 count;