genesys: Simplify motor setup to make it easier to expand

backend/genesys.cc

@@ -255,7 +255,8 @@ std::vector<std::reference_wrapper<Genesys_Sensor>>
 void
 sanei_genesys_init_structs (Genesys_Device * dev)
 {
-  unsigned int i, gpo_ok = 0, motor_ok = 0;
+    unsigned int i, gpo_ok = 0;
+    bool motor_ok = false;
     bool fe_ok = false;
 
   /* initialize the GPO data stuff */
@@ -268,14 +269,13 @@ sanei_genesys_init_structs (Genesys_Device * dev)
 	}
     }
 
-  /* initialize the motor data stuff */
-  for (i = 0; i < sizeof (Motor) / sizeof (Genesys_Motor); i++)
-    {
-      if (dev->model->motor_type == Motor[i].motor_id)
-	{
-          dev->motor = Motor[i];
-	  motor_ok = 1;
-	}
+    // initialize the motor data stuff
+    for (const auto& motor : *s_motors) {
+        if (dev->model->motor_type == motor.motor_id) {
+            dev->motor = motor;
+            motor_ok = true;
+            break;
+        }
     }
 
     for (const auto& frontend : *s_frontends) {
@@ -286,8 +286,7 @@ sanei_genesys_init_structs (Genesys_Device * dev)
         }
     }
 
-  /* sanity check */
-  if (motor_ok == 0 || gpo_ok == 0 || !fe_ok)
+    if (!motor_ok || gpo_ok == 0 || !fe_ok)
     {
       DBG(DBG_error0, "%s: bad description(s) for fe/gpo/motor=%d/%d/%d\n", __func__,
           dev->model->ccd_type, dev->model->gpo_type, dev->model->motor_type);
@@ -5426,6 +5425,7 @@ sane_init_impl(SANE_Int * version_code, SANE_Auth_Callback authorize)
   s_sane_devices_ptrs.init();
   genesys_init_sensor_tables();
   genesys_init_frontend_tables();
+    genesys_init_motor_tables();
     genesys_init_usb_device_tables();
 
 

backend/genesys_low.h

@@ -684,6 +684,7 @@ private:
 extern StaticInit<std::vector<Genesys_Sensor>> s_sensors;
 void genesys_init_sensor_tables();
 void genesys_init_frontend_tables();
+void genesys_init_motor_tables();
 void genesys_init_usb_device_tables();
 
 void debug_dump(unsigned level, const Genesys_Settings& settings);

backend/genesys_motor.h

@@ -71,6 +71,14 @@ struct Genesys_Motor_Slope
         i = 0.0 for first entry and i = 1.0 for last entry in default table
     */
     float g = 0;
+
+    /* start speed, max end speed, step number */
+    /* maximum speed (second field) is used to compute exposure as seen by motor */
+    /* exposure=max speed/ slope dpi * base dpi */
+    /* 5144 = max pixels at 600 dpi */
+    /* 1288=(5144+8)*ydpi(=300)/base_dpi(=1200) , where 5152 is exposure */
+    /* 6440=9660/(1932/1288) */
+    // {  9560,  1912, 31, 0.8 },
 };
 
 
@@ -100,7 +108,6 @@ struct Genesys_Motor
     int power_mode_count = 0;
     // slopes to derive individual slopes from
     std::vector<std::vector<Genesys_Motor_Slope>> slopes;
-};
-
+};                                                 
 
 #endif // BACKEND_GENESYS_MOTOR_H