From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
If V4L2_CAP_DEVICE_CAPS is set, then the new device_caps field is filled with
the capabilities of the opened device node.
The capabilities field traditionally contains the capabilities of the whole
device. E.g., if you open video0, then if it contains VBI caps then that means
that there is a corresponding vbi node as well. And the capabilities field of
both the video and vbi node should contain identical caps.
However, it would be very useful to also have a capabilities field that contains
just the caps for the currently open device, hence the new CAP bit and field.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
include/linux/videodev2.h | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 4b752d5..2b6338b 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -243,8 +243,9 @@ struct v4l2_capability {
__u8 card[32]; /* i.e. "Hauppauge WinTV" */
__u8 bus_info[32]; /* "PCI:" + pci_name(pci_dev) */
__u32 version; /* should use KERNEL_VERSION() */
- __u32 capabilities; /* Device capabilities */
- __u32 reserved[4];
+ __u32 capabilities; /* Global device capabilities */
+ __u32 device_caps; /* Device node capabilities */
+ __u32 reserved[3];
};
/* Values for 'capabilities' field */
@@ -274,6 +275,8 @@ struct v4l2_capability {
#define V4L2_CAP_ASYNCIO 0x02000000 /* async I/O */
#define V4L2_CAP_STREAMING 0x04000000 /* streaming I/O ioctls */
+#define V4L2_CAP_DEVICE_CAPS 0x80000000 /* sets device capabilities field */
+
/*
* V I D E O I M A G E F O R M A T
*/
--
1.7.6.3
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
