Lines Matching refs:controls

16 Devices typically have a number of user-settable controls such as
19 different controls available, and furthermore, the range of possible
22 user interface for these controls that will work correctly with any
25 All controls are accessed using an ID value. V4L2 defines several IDs
27 controls using ``V4L2_CID_PRIVATE_BASE``  [#f1]_ and higher values. The
32 Generally applications should present controls to the user without
37 to change a few controls programmatically, for example to mute a device
40 Drivers may enumerate different controls after switching the current
55 V4L2 specifies an event mechanism to notify applications when controls
61 All controls use machine endianness.
151     controls ``V4L2_CID_DIGITAL_GAIN`` and ``V4L2_CID_ANALOGUE_GAIN``.
313     depending on particular custom controls should check the driver name
316 Applications can enumerate the available controls with the
322 device has one or more controls, ``VIDIOC_QUERYMENU`` when it has one or
323 more menu type controls.
328 Example: Enumerating all controls
370 Example: Enumerating all controls including compound controls
395 Example: Enumerating all user controls (old style)
443 Example: Changing controls
502    controls. This makes it hard to programmatically set such controls