Lines Matching full:control
80 Audio devices may expose a number of controls, like the playback volume control.
81 Each control has an integer
86 Any control may be changed by submitting
90 Control descriptions are available, allowing them to be grouped and
92 .Ss Opening and closing the control device
114 constants indicating whether control values can be read and
128 function closes the control device and frees any allocated resources
130 .Ss Control descriptions
141 representation of the control set.
143 Then, whenever a control description changes, the callback is
158 unsigned int addr; /* control address */
167 char group[SIOCTL_NAMEMAX]; /* group this control belongs to */
177 attribute is the control address, usable with
187 A previously valid control was deleted.
189 An integer control in the range from 0 to
194 A boolean control.
198 For instance the knob to control the amount of signal flowing
240 attribute indicates the maximum value of this control.
241 For boolean control types it is set to 1.
246 hints about the control, like the hardware model, or the units.
247 .Ss Changing and reading control values
250 function, by giving the index of the control and the new value.
254 a control changes.