    // video1 is cam_sync, the target of some ioctls
    s->video1_fd = open("/dev/v4l/by-path/platform-cam_sync-video-index0", O_RDWR | O_NONBLOCK);
    assert(s->video1_fd >= 0);
    LOGD("opened video1");
    s->rear.video1_fd = s->front.video1_fd = s->wide.video1_fd = s->video1_fd;
  
    // looks like there's only one of these
    s->isp_fd = open("/dev/v4l-subdev1", O_RDWR | O_NONBLOCK);
    assert(s->isp_fd >= 0);
    LOGD("opened isp");
 
</s> remove   s->rear.video0_fd = s->front.video0_fd = s->wide.video0_fd = s->video0_fd;
 </s> add   s->road_cam.video0_fd = s->driver_cam.video0_fd = s->wide_road_cam.video0_fd = s->video0_fd; </s> remove   s->rear.isp_fd = s->front.isp_fd = s->wide.isp_fd = s->isp_fd;
 </s> add   s->road_cam.isp_fd = s->driver_cam.isp_fd = s->wide_road_cam.isp_fd = s->isp_fd; </s> remove   if (rear) {
 </s> add   if (is_road_cam) { </s> remove   // init rear sensor
 </s> add   // init road camera sensor </s> remove       // rear camera (stats, for AE)
 </s> add       // road camera (stats, for AE)
  s->road_cam.video1_fd = s->driver_cam.video1_fd = s->wide_road_cam.video1_fd = s->video1_fd;
    // video1 is cam_sync, the target of some ioctls
    s->video1_fd = open("/dev/v4l/by-path/platform-cam_sync-video-index0", O_RDWR | O_NONBLOCK);
    assert(s->video1_fd >= 0);
    LOGD("opened video1");
  s->road_cam.video1_fd = s->driver_cam.video1_fd = s->wide_road_cam.video1_fd = s->video1_fd;
  
    // looks like there's only one of these
    s->isp_fd = open("/dev/v4l-subdev1", O_RDWR | O_NONBLOCK);
    assert(s->isp_fd >= 0);
    LOGD("opened isp");
keep keep keep keep replace keep keep keep keep keep
 camerad: rename variables&functions to follow new convention (#20096)

* rename CameraState variables to follow new convention

* continue

* rename camera_process functions

* qcom:rename exposure related variables

* continue

* update commments

* bool real -> bool is_road_cam

* rename sm_front -> sm

* remove paramater tname from start_process_thread

* rename rhd_front to is_rhd

* remove unused varialble name from struct CameraInfo

* rename env_send_xxx

* rename cap_front to cap_driver,cap_rear to cap_road

* rename xxx_camera_process to process_xxx_camera

* update snapshot.py 
selfdrive/camerad/cameras/camera_qcom2.cc