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| -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. |