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author | Hans Verkuil <hans.verkuil@cisco.com> | 2012-01-11 06:45:05 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-01-23 16:34:27 -0200 |
commit | 583aa3a9b5ca846a84f7dd87bdc4b75dca07b011 (patch) | |
tree | a86d9d5f2e9817e9faf9d2e06d212d4380924fe9 /Documentation/DocBook/media/v4l/v4l2.xml | |
parent | 93596ef7db3e9bcc9306c3e93cf28ce1048858b6 (diff) | |
download | linux-3.10-583aa3a9b5ca846a84f7dd87bdc4b75dca07b011.tar.gz linux-3.10-583aa3a9b5ca846a84f7dd87bdc4b75dca07b011.tar.bz2 linux-3.10-583aa3a9b5ca846a84f7dd87bdc4b75dca07b011.zip |
[media] V4L2: Add per-device-node capabilities
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 physical
device, being a superset of all capabilities available at the several device
nodes. E.g., if you open /dev/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 nodes 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@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/DocBook/media/v4l/v4l2.xml')
-rw-r--r-- | Documentation/DocBook/media/v4l/v4l2.xml | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml index e97c512861b..dce3fef15bc 100644 --- a/Documentation/DocBook/media/v4l/v4l2.xml +++ b/Documentation/DocBook/media/v4l/v4l2.xml @@ -128,6 +128,13 @@ structs, ioctls) must be noted in more detail in the history chapter applications. --> <revision> + <revnumber>3.3</revnumber> + <date>2012-01-11</date> + <authorinitials>hv</authorinitials> + <revremark>Added device_caps field to struct v4l2_capabilities.</revremark> + </revision> + + <revision> <revnumber>3.2</revnumber> <date>2011-08-26</date> <authorinitials>hv</authorinitials> @@ -417,7 +424,7 @@ and discussions on the V4L mailing list.</revremark> </partinfo> <title>Video for Linux Two API Specification</title> - <subtitle>Revision 3.2</subtitle> + <subtitle>Revision 3.3</subtitle> <chapter id="common"> &sub-common; |