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-rw-r--r--include/uapi/linux/uvcvideo.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/include/uapi/linux/uvcvideo.h b/include/uapi/linux/uvcvideo.h
index e80b4655d8cd..020714d2c5bd 100644
--- a/include/uapi/linux/uvcvideo.h
+++ b/include/uapi/linux/uvcvideo.h
@@ -68,4 +68,30 @@ struct uvc_xu_control_query {
#define UVCIOC_CTRL_MAP _IOWR('u', 0x20, struct uvc_xu_control_mapping)
#define UVCIOC_CTRL_QUERY _IOWR('u', 0x21, struct uvc_xu_control_query)
+/*
+ * Metadata node
+ */
+
+/**
+ * struct uvc_meta_buf - metadata buffer building block
+ * @ns - system timestamp of the payload in nanoseconds
+ * @sof - USB Frame Number
+ * @length - length of the payload header
+ * @flags - payload header flags
+ * @buf - optional device-specific header data
+ *
+ * UVC metadata nodes fill buffers with possibly multiple instances of this
+ * struct. The first two fields are added by the driver, they can be used for
+ * clock synchronisation. The rest is an exact copy of a UVC payload header.
+ * Only complete objects with complete buffers are included. Therefore it's
+ * always sizeof(meta->ts) + sizeof(meta->sof) + meta->length bytes large.
+ */
+struct uvc_meta_buf {
+ __u64 ns;
+ __u16 sof;
+ __u8 length;
+ __u8 flags;
+ __u8 buf[];
+} __packed;
+
#endif