optimize RS-Viewer loading time

src/platform-camera.cpp

@@ -64,6 +64,30 @@ class platform_camera_sensor : public synthetic_sensor
 
 }  // namespace
 
+void platform_camera::initialize()
+{
+    auto const n_sensors = get_sensors_count();
+    for (auto i = 0; i < n_sensors; ++i)
+    {
+        if (auto sensor = dynamic_cast<platform_camera_sensor*>(&(get_sensor(i))))
+        {
+            if (sensor->get_device().get_info(RS2_CAMERA_INFO_NAME) == "Platform Camera")
+            {
+                sensor->try_register_pu(RS2_OPTION_BACKLIGHT_COMPENSATION);
+                sensor->try_register_pu(RS2_OPTION_BRIGHTNESS);
+                sensor->try_register_pu(RS2_OPTION_CONTRAST);
+                sensor->try_register_pu(RS2_OPTION_EXPOSURE);
+                sensor->try_register_pu(RS2_OPTION_GAMMA);
+                sensor->try_register_pu(RS2_OPTION_HUE);
+                sensor->try_register_pu(RS2_OPTION_SATURATION);
+                sensor->try_register_pu(RS2_OPTION_SHARPNESS);
+                sensor->try_register_pu(RS2_OPTION_WHITE_BALANCE);
+                sensor->try_register_pu(RS2_OPTION_ENABLE_AUTO_EXPOSURE);
+                sensor->try_register_pu(RS2_OPTION_ENABLE_AUTO_WHITE_BALANCE);
+            }
+        }
+    }
+}
 
 platform_camera::platform_camera( std::shared_ptr< const device_info > const & dev_info,
                                   const std::vector< platform::uvc_device_info > & uvc_infos,
@@ -118,20 +142,13 @@ platform_camera::platform_camera( std::shared_ptr< const device_info > const & d
     color_ep->register_metadata( RS2_FRAME_METADATA_FRAME_TIMESTAMP,
                                  make_uvc_header_parser( &platform::uvc_header::timestamp ) );
 
-    color_ep->try_register_pu( RS2_OPTION_BACKLIGHT_COMPENSATION );
-    color_ep->try_register_pu( RS2_OPTION_BRIGHTNESS );
-    color_ep->try_register_pu( RS2_OPTION_CONTRAST );
-    color_ep->try_register_pu( RS2_OPTION_EXPOSURE );
-    color_ep->try_register_pu( RS2_OPTION_GAMMA );
-    color_ep->try_register_pu( RS2_OPTION_HUE );
-    color_ep->try_register_pu( RS2_OPTION_SATURATION );
-    color_ep->try_register_pu( RS2_OPTION_SHARPNESS );
-    color_ep->try_register_pu( RS2_OPTION_WHITE_BALANCE );
-    color_ep->try_register_pu( RS2_OPTION_ENABLE_AUTO_EXPOSURE );
-    color_ep->try_register_pu( RS2_OPTION_ENABLE_AUTO_WHITE_BALANCE );
+    // Create a thread to call initialize after a delay
+    std::thread([this]() {
+    std::this_thread::sleep_for(std::chrono::seconds(2)); // Delay for 2 seconds
+    this->initialize();
+    }).detach(); // Detach the thread to let it run independently
 }
 
-
 std::vector< tagged_profile > platform_camera::get_profiles_tags() const
 {
     std::vector< tagged_profile > markers;

src/platform-camera.h

@@ -20,6 +20,9 @@ class platform_camera : public backend_device
     virtual rs2_intrinsics get_intrinsics( unsigned int, const stream_profile & ) const { return rs2_intrinsics{}; }
 
     std::vector< tagged_profile > get_profiles_tags() const override;
+
+private:
+    void initialize();
 };
 
 

tools/realsense-viewer/realsense-viewer.cpp

@@ -130,7 +130,7 @@ void add_playback_device( context & ctx,
 // This function is called every frame
 // If between the frames there was an asyncronous connect/disconnect event
 // the function will pick up on this and add the device to the viewer
-bool refresh_devices(std::mutex& m,
+void refresh_devices(std::mutex& m,
     context& ctx,
     device_changes& devices_connection_changes,
     std::vector<device>& current_connected_devices,
@@ -139,9 +139,10 @@ bool refresh_devices(std::mutex& m,
     viewer_model& viewer_model,
     std::string& error_message)
 {
+
     event_information info({}, {});
     if (!devices_connection_changes.try_get_next_changes(info))
-        return false;
+        return ;
     try
     {
         //Remove disconnected
@@ -283,7 +284,7 @@ bool refresh_devices(std::mutex& m,
     {
         error_message = "Unknown error";
     }
-    return true;
+    return;
 }
 
 
@@ -372,7 +373,7 @@ int main(int argc, const char** argv) try
     // Closing the window
     while (window)
     {
-        auto device_changed = refresh_devices(m, ctx, devices_connection_changes, connected_devs,
+        refresh_devices(m, ctx, devices_connection_changes, connected_devs,
             device_names, *device_models, viewer_model, error_message);
 
         auto output_height = viewer_model.get_output_height();
@@ -504,7 +505,7 @@ int main(int argc, const char** argv) try
 
             ImGui::PopStyleColor();
             ImGui::EndPopup();
-            }
+        }
         ImGui::PopFont();
         ImGui::PopStyleVar();
         ImGui::PopStyleColor();