Provide gamepad mask at startup

src/input/evdev.c

@@ -91,6 +91,8 @@ static bool* currentReverse;
 
 static bool grabbingDevices;
 
+int evdev_gamepads = 0;
+
 #define QUIT_MODIFIERS (MODIFIER_SHIFT|MODIFIER_ALT|MODIFIER_CTRL)
 #define QUIT_KEY KEY_Q
 #define QUIT_BUTTONS (PLAY_FLAG|BACK_FLAG|LB_FLAG|RB_FLAG)
@@ -495,6 +497,9 @@ void evdev_create(const char* device, struct mapping* mappings, bool verbose) {
     mappings = default_mapping;
   }
 
+  if (!is_keyboard && !is_mouse)
+    evdev_gamepads++;
+
   int dev = numDevices;
   numDevices++;
 

src/input/evdev.h

@@ -19,6 +19,8 @@
 
 #include "mapping.h"
 
+extern int evdev_gamepads;
+
 void evdev_create(const char* device, struct mapping* mappings, bool verbose);
 void evdev_loop();
 

src/input/sdl.c

@@ -42,6 +42,8 @@ static GAMEPAD_STATE gamepads[4];
 static int keyboard_modifiers;
 static int activeGamepadMask = 0;
 
+int sdl_gamepads = 0;
+
 void sdlinput_init(char* mappings) {
   memset(gamepads, 0, sizeof(gamepads));
 
@@ -50,6 +52,7 @@ void sdlinput_init(char* mappings) {
 
   for (int i = 0; i < SDL_NumJoysticks(); ++i) {
     if (SDL_IsGameController(i)) {
+      sdl_gamepads++;
       if (!SDL_GameControllerOpen(i)) {
         fprintf(stderr, "Could not open gamecontroller %i: %s\n", i, SDL_GetError());
       }

src/input/sdl.h

@@ -20,6 +20,8 @@
 #include <stdbool.h>
 #include <SDL.h>
 
+extern int sdl_gamepads;
+
 static const short keyCodes1[] = {
   0, //SDLK_EXCLAIM
   0, //SDLK_QUOTEDBL

src/main.c

@@ -90,7 +90,16 @@ static void stream(PSERVER_DATA server, PCONFIGURATION config, enum platform sys
     exit(-1);
   }
 
-  int ret = gs_start_app(server, &config->stream, appId, config->sops, config->localaudio);
+  int gamepads = 0;
+  gamepads += evdev_gamepads;
+  #ifdef HAVE_SDL
+  gamepads += sdl_gamepads;
+  #endif
+  int gamepad_mask;
+  for (int i = 0; i < gamepads && i < 4; i++)
+    gamepad_mask = (gamepad_mask << 1) + 1;
+
+  int ret = gs_start_app(server, &config->stream, appId, config->sops, config->localaudio, gamepad_mask);
   if (ret < 0) {
     if (ret == GS_NOT_SUPPORTED_4K)
       fprintf(stderr, "Server doesn't support 4K\n");