Lines Matching defs:gain
2 * Auto gain algorithm for camera's with a coarse exposure control
25 this algorithm normally tries to only adjust the gain (between 40 and
34 Returns 0 if no changes were made, 1 if the gain and or exposure settings
39 int i, steps, gain, orig_gain, exposure, orig_exposure;
56 "called on cam without gain or exposure");
60 if (gain_ctrl->get(gspca_dev, &gain) ||
64 orig_gain = gain;
80 if ((gain + steps) > gain_high &&
82 gain = gain_high;
84 } else if ((gain + steps) < gain_low &&
86 gain = gain_low;
89 gain += steps;
90 if (gain > gain_ctrl->qctrl.maximum)
91 gain = gain_ctrl->qctrl.maximum;
92 else if (gain < gain_ctrl->qctrl.minimum)
93 gain = gain_ctrl->qctrl.minimum;
106 if (gain != orig_gain) {
107 gain_ctrl->set(gspca_dev, gain);