  } CameraState;
  
  
  typedef struct MultiCameraState {
    int ispif_fd;
  
    CameraState rear;
    CameraState front;
  
    SubMaster *sm;
    PubMaster *pm;
 
</s> remove   int camera_id;
 </s> add  </s> remove 
  float cur_gain_frac;

 </s> add 
  } CameraState;
  
  
  typedef struct MultiCameraState {


    CameraState rear;
    CameraState front;
  
    SubMaster *sm;
    PubMaster *pm;
keep keep keep keep replace replace keep keep keep keep keep
 webcam cleanup: remove unused variables (#2450) 
selfdrive/camerad/cameras/camera_webcam.h