def _set_autogain(self, state, camera=0):
     ''' 0 is off; 1 is on '''
     if self._ag_control is not None and self._ag_control.value == state:
         return
     try:
         video_capture_device = open(self.devices[camera], 'rw')
     except BaseException:
         video_capture_device = None
         debug_output('video capture device not available',
                      self._parent.running_sugar)
         return
     self._ag_control = v4l2_control(V4L2_CID_AUTOGAIN)
     try:
         ioctl(video_capture_device, VIDIOC_G_CTRL, self._ag_control)
         self._ag_control.value = state
         ioctl(video_capture_device, VIDIOC_S_CTRL, self._ag_control)
     except BaseException:
         pass
     video_capture_device.close()
Exemplo n.º 2
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 def _set_autogain(self, state, camera=0):
     ''' 0 is off; 1 is on '''
     if self._ag_control is not None and self._ag_control.value == state:
         return
     try:
         video_capture_device = open(self.devices[camera], 'rw')
     except:
         video_capture_device = None
         debug_output('video capture device not available',
                      self._parent.running_sugar)
         return
     self._ag_control = v4l2_control(V4L2_CID_AUTOGAIN)
     try:
         ioctl(video_capture_device, VIDIOC_G_CTRL, self._ag_control)
         self._ag_control.value = state
         ioctl(video_capture_device, VIDIOC_S_CTRL, self._ag_control)
     except:
         pass
     video_capture_device.close()