diff options
| author | Jacopo Mondi <jacopo@jmondi.org> | 2020-05-09 11:04:46 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-05-18 15:33:26 +0200 |
| commit | 9397a83f40183eeafd5c787af2240ed0d6b26daa (patch) | |
| tree | 550e2b2a33a47386dfe1871c89a734e75290c49b /Documentation/userspace-api/media | |
| parent | 915bd31ce9ed328535e5ecf3ca730c5764ec1a38 (diff) | |
media: v4l2-ctrl: Document V4L2_CID_CAMERA_ORIENTATION
Add documentation for the V4L2_CID_CAMERA_ORIENTATION camera
control. The newly added read-only control reports the camera device
orientation relative to the usage orientation of the system the camera
is installed on.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'Documentation/userspace-api/media')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/ext-ctrls-camera.rst | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-camera.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-camera.rst index e39f84d2447f..5d7fca799f2a 100644 --- a/Documentation/userspace-api/media/v4l/ext-ctrls-camera.rst +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-camera.rst @@ -510,6 +510,36 @@ enum v4l2_scene_mode - value down. A value of zero stops the motion if one is in progress and has no effect otherwise. +``V4L2_CID_CAMERA_ORIENTATION (menu)`` + This read-only control describes the camera orientation by reporting its + mounting position on the device where the camera is installed. The control + value is constant and not modifiable by software. This control is + particularly meaningful for devices which have a well defined orientation, + such as phones, laptops and portable devices since the control is expressed + as a position relative to the device's intended usage orientation. For + example, a camera installed on the user-facing side of a phone, a tablet or + a laptop device is said to be have ``V4L2_CAMERA_ORIENTATION_FRONT`` + orientation, while a camera installed on the opposite side of the front one + is said to be have ``V4L2_CAMERA_ORIENTATION_BACK`` orientation. Camera + sensors not directly attached to the device, or attached in a way that + allows them to move freely, such as webcams and digital cameras, are said to + have the ``V4L2_CAMERA_ORIENTATION_EXTERNAL`` orientation. + + + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + * - ``V4L2_CAMERA_ORIENTATION_FRONT`` + - The camera is oriented towards the user facing side of the device. + * - ``V4L2_CAMERA_ORIENTATION_BACK`` + - The camera is oriented towards the back facing side of the device. + * - ``V4L2_CAMERA_ORIENTATION_EXTERNAL`` + - The camera is not directly attached to the device and is freely movable. + + + .. [#f1] This control may be changed to a menu control in the future, if more options are required. |