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Hot plugging / hot swapping of game controller(s)

Browse source 
May be unreliable on some devices, e.g. Nintendo Switch Pro Controller.
Works great on others, e.g. DualShock 4.

Delay added to gamepad initialization on hotplug, gives time to the OS to
recognize the device.
This commit is contained in:
Jaime Moreira 2022-05-08 01:05:07 -04:00
parent 20542420ef
commit 422715cee2
1 changed files with 71 additions and 5 deletions
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76
src/client/input/sdl.c
View file

@ -130,6 +130,10 @@ static cvar_t *joy_axis_triggerright_threshold;
// Joystick haptic
static cvar_t *joy_haptic_magnitude;
// Support for hot plugging of game controller
static qboolean first_init = true;
static int init_delay = 30;
/* ------------------------------------------------------------------ */
/*
@ -458,6 +462,9 @@ IN_TranslateGamepadBtnToQ2Key(int btn)
return 0;
}
static void IN_Controller_Init(qboolean notify_user);
static void IN_Controller_Shutdown(qboolean notify_user);
/* ------------------------------------------------------------------ */
/*
@ -634,7 +641,6 @@ IN_Update(void)
if(key != 0)
{
Key_Event(key, down, true);
}
break;
@ -772,6 +778,25 @@ IN_Update(void)
break;
}
case SDL_CONTROLLERDEVICEREMOVED:
if (!controller)
{
break;
}
if (event.cdevice.which == SDL_JoystickInstanceID(SDL_GameControllerGetJoystick(controller))) {
IN_Controller_Shutdown(true);
IN_Controller_Init(false);
}
break;
case SDL_JOYDEVICEADDED:
if (!controller)
{
// This should be lower, but some controllers just don't want to get detected by the OS
init_delay = 100;
}
break;
case SDL_QUIT:
Com_Quit();
break;
@ -796,6 +821,26 @@ IN_Update(void)
// We need to save the frame time so other subsystems
// know the exact time of the last input events.
sys_frame_time = Sys_Milliseconds();
// Hot plugging delay handling, to not be "overwhelmed" because some controllers
// present themselves as two different devices, triggering SDL_JOYDEVICEADDED
// too many times. They could trigger it even at game initialization.
if (init_delay)
{
init_delay--;
if (!init_delay)
{
if (!first_init)
{
IN_Controller_Shutdown(false);
IN_Controller_Init(true);
}
else
{
first_init = false;
}
}
}
}
/*
@ -1192,7 +1237,7 @@ Haptic_Feedback(char *name, int effect_volume, int effect_duration,
* Game Controller
*/
static void
IN_Controller_Init(void)
IN_Controller_Init(qboolean notify_user)
{
cvar_t *in_sdlbackbutton;
int nummappings;
@ -1216,6 +1261,11 @@ IN_Controller_Init(void)
}
}
if (notify_user)
{
Com_Printf("- Game Controller init attempt -\n");
}
if (!SDL_WasInit(SDL_INIT_GAMECONTROLLER | SDL_INIT_HAPTIC))
{
if (SDL_Init(SDL_INIT_GAMECONTROLLER | SDL_INIT_HAPTIC) == -1)
@ -1255,8 +1305,19 @@ IN_Controller_Init(void)
{
joystick = SDL_JoystickOpen(i);
const char* joystick_name = SDL_JoystickName(joystick);
const int name_len = strlen(joystick_name);
Com_Printf ("The name of the joystick is '%s'\n", joystick_name);
// Ugly hack to detect IMU-only devices - works for Switch Pro Controller at least
if (name_len > 4 && !strncmp(joystick_name + name_len - 4, " IMU", 4))
{
Com_Printf ("Skipping IMU device.\n");
SDL_JoystickClose(joystick);
joystick = NULL;
continue;
}
Com_Printf ("Number of Axes: %d\n", SDL_JoystickNumAxes(joystick));
Com_Printf ("Number of Buttons: %d\n", SDL_JoystickNumButtons(joystick));
Com_Printf ("Number of Balls: %d\n", SDL_JoystickNumBalls(joystick));
@ -1373,7 +1434,7 @@ IN_Init(void)
SDL_StartTextInput();
IN_Controller_Init();
IN_Controller_Init(false);
Com_Printf("------------------------------------\n\n");
}
@ -1394,8 +1455,13 @@ IN_Haptic_Shutdown(void)
}
static void
IN_Controller_Shutdown(void)
IN_Controller_Shutdown(qboolean notify_user)
{
if (notify_user)
{
Com_Printf("- Game Controller disconnected -\n");
}
IN_Haptic_Shutdown();
if (controller)
@ -1414,7 +1480,7 @@ IN_Shutdown(void)
Com_Printf("Shutting down input.\n");
IN_Controller_Shutdown();
IN_Controller_Shutdown(false);
const Uint32 subsystems = SDL_INIT_GAMECONTROLLER | SDL_INIT_HAPTIC;
if (SDL_WasInit(subsystems) == subsystems)