Lines Matching refs:controls

19 …OC_S_EXT_CTRLS - VIDIOC_TRY_EXT_CTRLS - Get or set the value of several controls, try control valu…
50 These ioctls allow the caller to get or set multiple controls
52 :ref:`ctrl-class`) and all controls in the control array must belong
55 Applications must always fill in the ``count``, ``which``, ``controls``
59 by the ``controls`` fields.
61 To get the current value of a set of controls applications initialize
64 :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. String controls controls must also set the
69 relevant for pointer-type controls like strings), then the driver will
83 To change the value of a set of controls applications initialize the
86 the :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. The controls will only be set if *all*
89 To check if a set of controls have correct values applications
107 then the controls are not applied immediately when calling
120 values of the controls at the time of request completion.
124 The driver will only set/get these controls if all control values are
125 correct. This prevents the situation where only some of the controls
149 	normally 0, but for pointer controls this should be set to the
158 	   For string controls, this ``size`` field should
226       - The control class to which all controls belong, see
228 	handling controls will also accept a value of 0 here, meaning that
229 	the controls can belong to any control class. Whether drivers
240 	these controls have to be retrieved from a request or tried/set for
251 	(see :ref:`ctrl-class`). In that case all controls have to
261       - The number of controls in the controls array. May also be zero.
271 	Before controls are read from/written to hardware a validation
272 	step takes place: this checks if all controls in the list are
273 	valid controls, if no attempt is made to write to a read-only
293 	``error_idx`` is less than ``count`` and only the controls up to
295 	the remaining controls is undefined.
318       - ``controls``
335       - The class containing user controls. These controls are described
336 	in :ref:`control`. All controls that can be set using the
342       - The class containing MPEG compression controls. These controls are
343 	described in :ref:`mpeg-controls`.
346       - The class containing camera controls. These controls are described
347 	in :ref:`camera-controls`.
350       - The class containing FM Transmitter (FM TX) controls. These
351 	controls are described in :ref:`fm-tx-controls`.
354       - The class containing flash device controls. These controls are
355 	described in :ref:`flash-controls`.
358       - The class containing JPEG compression controls. These controls are
359 	described in :ref:`jpeg-controls`.
362       - The class containing image source controls. These controls are
363 	described in :ref:`image-source-controls`.
366       - The class containing image processing controls. These controls are
367 	described in :ref:`image-process-controls`.
370       - The class containing FM Receiver (FM RX) controls. These controls
371 	are described in :ref:`fm-rx-controls`.
374       - The class containing RF tuner controls. These controls are
375 	described in :ref:`rf-tuner-controls`.