Feature: Win Only - Ability to enable controller preallocation and alternate controller numbering

src/config.cpp

@@ -436,6 +436,13 @@ namespace config {
     }
   }  // namespace dd
 
+  alt_gamepad_numbering_t alt_gamepad_numbering {
+    {}, // alt_gamepad_numbering_mutex
+    {}, // sDeviceNames
+    true, // bFirstTimeControllerAllocation
+    true, // bFirstTimeParsing 
+  };
+
   video_t video {
     false, // headless_mode
     true, // limit_framerate
@@ -572,6 +579,9 @@ namespace config {
     true,  // high resolution scrolling
     true,  // native pen/touch support
     false, // enable input only mode
+    false, // alt_controller enable
+    "", // alt_controller_order_string
+    4, // alt_controller_count
   };
 
   sunshine_t sunshine {
@@ -1281,6 +1291,9 @@ namespace config {
     bool_f(vars, "high_resolution_scrolling", input.high_resolution_scrolling);
     bool_f(vars, "native_pen_touch", input.native_pen_touch);
     bool_f(vars, "enable_input_only_mode", input.enable_input_only_mode);
+    bool_f(vars, "enable_alt_controller_numbering_mode", input.enable_alt_controller_numbering_mode);
+    string_f(vars, "alt_controller_order_string", input.alt_controller_order_string);
+    int_between_f(vars, "alt_controller_count", input.alt_controller_count, {1, 16});  // CORRESPONDS TO MAX_GAMEPADS = 16 in common.h on /src/platform/common.h
 
     bool_f(vars, "hide_tray_controls", sunshine.hide_tray_controls);
     bool_f(vars, "enable_pairing", sunshine.enable_pairing);

src/config.h

@@ -11,6 +11,7 @@
 #include <string>
 #include <unordered_map>
 #include <vector>
+#include <mutex>
 
 // local includes
 #include "nvenc/nvenc_config.h"
@@ -212,6 +213,10 @@ namespace config {
     bool native_pen_touch;
 
     bool enable_input_only_mode;
+    // Alternate Controller Numbering Mode
+    bool enable_alt_controller_numbering_mode;
+    std::string alt_controller_order_string;
+    int alt_controller_count;
   };
 
   namespace flag {
@@ -285,7 +290,16 @@ namespace config {
     std::vector<prep_cmd_t> state_cmds;
     std::vector<server_cmd_t> server_cmds;
   };
-
+
+  // Alternate Controller Numbering Mode
+  struct alt_gamepad_numbering_t {
+    std::mutex alt_gamepad_numbering_mutex;
+    std::vector< std::string > sDeviceNames;
+    volatile bool bFirstTimeControllerAllocation { true };
+    volatile bool bFirstTimeParsing { true };
+  }; 
+
+  extern alt_gamepad_numbering_t alt_gamepad_numbering;
   extern video_t video;
   extern audio_t audio;
   extern stream_t stream;