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SDL_joystick.c
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/*
Simple DirectMedia Layer
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
/* This is the joystick API for Simple DirectMedia Layer */
#include "SDL.h"
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#include "SDL_atomic.h"
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#include "SDL_events.h"
#include "SDL_sysjoystick.h"
#include "SDL_assert.h"
#include "SDL_hints.h"
#if !SDL_EVENTS_DISABLED
#include "../events/SDL_events_c.h"
#endif
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#include "../video/SDL_sysvideo.h"
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#include "hidapi/SDL_hidapijoystick_c.h"
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/* This is included in only one place because it has a large static list of controllers */
#include "controller_type.h"
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#ifdef __WIN32__
/* Needed for checking for input remapping programs */
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#include "../core/windows/SDL_windows.h"
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#undef UNICODE /* We want ASCII functions */
#include <tlhelp32.h>
#endif
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#if SDL_JOYSTICK_VIRTUAL
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#include "./virtual/SDL_virtualjoystick_c.h"
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#endif
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static SDL_JoystickDriver *SDL_joystick_drivers[] = {
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#ifdef SDL_JOYSTICK_RAWINPUT /* Before WINDOWS_ driver, as WINDOWS wants to check if this driver is handling things */
/* Also before HIDAPI, as HIDAPI wants to check if this driver is handling things */
&SDL_RAWINPUT_JoystickDriver,
#endif
#ifdef SDL_JOYSTICK_HIDAPI /* Before WINDOWS_ driver, as WINDOWS wants to check if this driver is handling things */
&SDL_HIDAPI_JoystickDriver,
#endif
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#if defined(SDL_JOYSTICK_WGI)
&SDL_WGI_JoystickDriver,
#endif
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#if defined(SDL_JOYSTICK_DINPUT) || defined(SDL_JOYSTICK_XINPUT)
&SDL_WINDOWS_JoystickDriver,
#endif
#ifdef SDL_JOYSTICK_LINUX
&SDL_LINUX_JoystickDriver,
#endif
#ifdef SDL_JOYSTICK_IOKIT
&SDL_DARWIN_JoystickDriver,
#endif
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#if (defined(__IPHONEOS__) || defined(__TVOS__)) && !defined(SDL_JOYSTICK_DISABLED)
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&SDL_IOS_JoystickDriver,
#endif
#ifdef SDL_JOYSTICK_ANDROID
&SDL_ANDROID_JoystickDriver,
#endif
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#ifdef SDL_JOYSTICK_EMSCRIPTEN
&SDL_EMSCRIPTEN_JoystickDriver,
#endif
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#ifdef SDL_JOYSTICK_HAIKU
&SDL_HAIKU_JoystickDriver,
#endif
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#ifdef SDL_JOYSTICK_USBHID /* !!! FIXME: "USBHID" is a generic name, and doubly-confusing with HIDAPI next to it. This is the *BSD interface, rename this. */
&SDL_BSD_JoystickDriver,
#endif
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#ifdef SDL_JOYSTICK_VIRTUAL
&SDL_VIRTUAL_JoystickDriver,
#endif
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#if defined(SDL_JOYSTICK_DUMMY) || defined(SDL_JOYSTICK_DISABLED)
&SDL_DUMMY_JoystickDriver
#endif
};
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static SDL_bool SDL_joystick_allows_background_events = SDL_FALSE;
static SDL_Joystick *SDL_joysticks = NULL;
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static SDL_bool SDL_updating_joystick = SDL_FALSE;
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static SDL_mutex *SDL_joystick_lock = NULL; /* This needs to support recursive locks */
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static SDL_atomic_t SDL_next_joystick_instance_id;
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static int SDL_joystick_player_count = 0;
static SDL_JoystickID *SDL_joystick_players = NULL;
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void
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SDL_LockJoysticks(void)
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{
if (SDL_joystick_lock) {
SDL_LockMutex(SDL_joystick_lock);
}
}
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void
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SDL_UnlockJoysticks(void)
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{
if (SDL_joystick_lock) {
SDL_UnlockMutex(SDL_joystick_lock);
}
}
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static int
SDL_FindFreePlayerIndex()
{
int player_index;
for (player_index = 0; player_index < SDL_joystick_player_count; ++player_index) {
if (SDL_joystick_players[player_index] == -1) {
return player_index;
}
}
return player_index;
}
static int
SDL_GetPlayerIndexForJoystickID(SDL_JoystickID instance_id)
{
int player_index;
for (player_index = 0; player_index < SDL_joystick_player_count; ++player_index) {
if (instance_id == SDL_joystick_players[player_index]) {
break;
}
}
if (player_index == SDL_joystick_player_count) {
player_index = -1;
}
return player_index;
}
static SDL_JoystickID
SDL_GetJoystickIDForPlayerIndex(int player_index)
{
if (player_index < 0 || player_index >= SDL_joystick_player_count) {
return -1;
}
return SDL_joystick_players[player_index];
}
static SDL_bool
SDL_SetJoystickIDForPlayerIndex(int player_index, SDL_JoystickID instance_id)
{
SDL_JoystickID existing_instance = SDL_GetJoystickIDForPlayerIndex(player_index);
SDL_JoystickDriver *driver;
int device_index;
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int existing_player_index;
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if (player_index < 0) {
return SDL_FALSE;
}
if (player_index >= SDL_joystick_player_count) {
SDL_JoystickID *new_players = (SDL_JoystickID *)SDL_realloc(SDL_joystick_players, (player_index + 1)*sizeof(*SDL_joystick_players));
if (!new_players) {
SDL_OutOfMemory();
return SDL_FALSE;
}
SDL_joystick_players = new_players;
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SDL_memset(&SDL_joystick_players[SDL_joystick_player_count], 0xFF, (player_index - SDL_joystick_player_count + 1) * sizeof(SDL_joystick_players[0]));
SDL_joystick_player_count = player_index + 1;
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} else if (SDL_joystick_players[player_index] == instance_id) {
/* Joystick is already assigned the requested player index */
return SDL_TRUE;
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}
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/* Clear the old player index */
existing_player_index = SDL_GetPlayerIndexForJoystickID(instance_id);
if (existing_player_index >= 0) {
SDL_joystick_players[existing_player_index] = -1;
}
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SDL_joystick_players[player_index] = instance_id;
/* Update the driver with the new index */
device_index = SDL_JoystickGetDeviceIndexFromInstanceID(instance_id);
if (SDL_GetDriverAndJoystickIndex(device_index, &driver, &device_index)) {
driver->SetDevicePlayerIndex(device_index, player_index);
}
/* Move any existing joystick to another slot */
if (existing_instance >= 0) {
SDL_SetJoystickIDForPlayerIndex(SDL_FindFreePlayerIndex(), existing_instance);
}
return SDL_TRUE;
}
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static void SDLCALL
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SDL_JoystickAllowBackgroundEventsChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
if (hint && *hint == '1') {
SDL_joystick_allows_background_events = SDL_TRUE;
} else {
SDL_joystick_allows_background_events = SDL_FALSE;
}
}
int
SDL_JoystickInit(void)
{
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int i, status;
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SDL_GameControllerInitMappings();
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/* Create the joystick list lock */
if (!SDL_joystick_lock) {
SDL_joystick_lock = SDL_CreateMutex();
}
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/* See if we should allow joystick events while in the background */
SDL_AddHintCallback(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,
SDL_JoystickAllowBackgroundEventsChanged, NULL);
#if !SDL_EVENTS_DISABLED
if (SDL_InitSubSystem(SDL_INIT_EVENTS) < 0) {
return -1;
}
#endif /* !SDL_EVENTS_DISABLED */
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status = -1;
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
if (SDL_joystick_drivers[i]->Init() >= 0) {
status = 0;
}
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}
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return status;
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}
/*
* Count the number of joysticks attached to the system
*/
int
SDL_NumJoysticks(void)
{
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int i, total_joysticks = 0;
SDL_LockJoysticks();
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
total_joysticks += SDL_joystick_drivers[i]->GetCount();
}
SDL_UnlockJoysticks();
return total_joysticks;
}
/*
* Return the next available joystick instance ID
* This may be called by drivers from multiple threads, unprotected by any locks
*/
SDL_JoystickID SDL_GetNextJoystickInstanceID()
{
return SDL_AtomicIncRef(&SDL_next_joystick_instance_id);
}
/*
* Get the driver and device index for an API device index
* This should be called while the joystick lock is held, to prevent another thread from updating the list
*/
SDL_bool
SDL_GetDriverAndJoystickIndex(int device_index, SDL_JoystickDriver **driver, int *driver_index)
{
int i, num_joysticks, total_joysticks = 0;
if (device_index >= 0) {
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
num_joysticks = SDL_joystick_drivers[i]->GetCount();
if (device_index < num_joysticks) {
*driver = SDL_joystick_drivers[i];
*driver_index = device_index;
return SDL_TRUE;
}
device_index -= num_joysticks;
total_joysticks += num_joysticks;
}
}
SDL_SetError("There are %d joysticks available", total_joysticks);
return SDL_FALSE;
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}
/*
* Get the implementation dependent name of a joystick
*/
const char *
SDL_JoystickNameForIndex(int device_index)
{
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SDL_JoystickDriver *driver;
const char *name = NULL;
SDL_LockJoysticks();
if (SDL_GetDriverAndJoystickIndex(device_index, &driver, &device_index)) {
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name = driver->GetDeviceName(device_index);
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}
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SDL_UnlockJoysticks();
/* FIXME: Really we should reference count this name so it doesn't go away after unlock */
return name;
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}
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/*
* Get the player index of a joystick, or -1 if it's not available
*/
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int
SDL_JoystickGetDevicePlayerIndex(int device_index)
{
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int player_index;
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SDL_LockJoysticks();
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player_index = SDL_GetPlayerIndexForJoystickID(SDL_JoystickGetDeviceInstanceID(device_index));
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SDL_UnlockJoysticks();
return player_index;
}
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/*
* Return true if this joystick is known to have all axes centered at zero
* This isn't generally needed unless the joystick never generates an initial axis value near zero,
* e.g. it's emulating axes with digital buttons
*/
static SDL_bool
SDL_JoystickAxesCenteredAtZero(SDL_Joystick *joystick)
{
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static Uint32 zero_centered_joysticks[] = {
MAKE_VIDPID(0x0e8f, 0x3013), /* HuiJia SNES USB adapter */
MAKE_VIDPID(0x05a0, 0x3232), /* 8Bitdo Zero Gamepad */
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};
int i;
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Uint32 id = MAKE_VIDPID(SDL_JoystickGetVendor(joystick),
SDL_JoystickGetProduct(joystick));
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/*printf("JOYSTICK '%s' VID/PID 0x%.4x/0x%.4x AXES: %d\n", joystick->name, vendor, product, joystick->naxes);*/
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if (joystick->naxes == 2) {
/* Assume D-pad or thumbstick style axes are centered at 0 */
return SDL_TRUE;
}
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for (i = 0; i < SDL_arraysize(zero_centered_joysticks); ++i) {
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if (id == zero_centered_joysticks[i]) {
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return SDL_TRUE;
}
}
return SDL_FALSE;
}
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/*
* Open a joystick for use - the index passed as an argument refers to
* the N'th joystick on the system. This index is the value which will
* identify this joystick in future joystick events.
*
* This function returns a joystick identifier, or NULL if an error occurred.
*/
SDL_Joystick *
SDL_JoystickOpen(int device_index)
{
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SDL_JoystickDriver *driver;
SDL_JoystickID instance_id;
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SDL_Joystick *joystick;
SDL_Joystick *joysticklist;
const char *joystickname = NULL;
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SDL_LockJoysticks();
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if (!SDL_GetDriverAndJoystickIndex(device_index, &driver, &device_index)) {
SDL_UnlockJoysticks();
return NULL;
}
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joysticklist = SDL_joysticks;
/* If the joystick is already open, return it
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* it is important that we have a single joystick * for each instance id
*/
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instance_id = driver->GetDeviceInstanceID(device_index);
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while (joysticklist) {
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if (instance_id == joysticklist->instance_id) {
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joystick = joysticklist;
++joystick->ref_count;
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SDL_UnlockJoysticks();
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return joystick;
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}
joysticklist = joysticklist->next;
}
/* Create and initialize the joystick */
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joystick = (SDL_Joystick *) SDL_calloc(sizeof(*joystick), 1);
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if (joystick == NULL) {
SDL_OutOfMemory();
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SDL_UnlockJoysticks();
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return NULL;
}
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joystick->driver = driver;
joystick->instance_id = instance_id;
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joystick->attached = SDL_TRUE;
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joystick->epowerlevel = SDL_JOYSTICK_POWER_UNKNOWN;
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if (driver->Open(joystick, device_index) < 0) {
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SDL_free(joystick);
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SDL_UnlockJoysticks();
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return NULL;
}
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joystickname = driver->GetDeviceName(device_index);
if (joystickname) {
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joystick->name = SDL_strdup(joystickname);
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} else {
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joystick->name = NULL;
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}
joystick->guid = driver->GetDeviceGUID(device_index);
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if (joystick->naxes > 0) {
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joystick->axes = (SDL_JoystickAxisInfo *) SDL_calloc(joystick->naxes, sizeof(SDL_JoystickAxisInfo));
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}
if (joystick->nhats > 0) {
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joystick->hats = (Uint8 *) SDL_calloc(joystick->nhats, sizeof(Uint8));
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}
if (joystick->nballs > 0) {
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joystick->balls = (struct balldelta *) SDL_calloc(joystick->nballs, sizeof(*joystick->balls));
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}
if (joystick->nbuttons > 0) {
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joystick->buttons = (Uint8 *) SDL_calloc(joystick->nbuttons, sizeof(Uint8));
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}
if (((joystick->naxes > 0) && !joystick->axes)
|| ((joystick->nhats > 0) && !joystick->hats)
|| ((joystick->nballs > 0) && !joystick->balls)
|| ((joystick->nbuttons > 0) && !joystick->buttons)) {
SDL_OutOfMemory();
SDL_JoystickClose(joystick);
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SDL_UnlockJoysticks();
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return NULL;
}
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/* If this joystick is known to have all zero centered axes, skip the auto-centering code */
if (SDL_JoystickAxesCenteredAtZero(joystick)) {
int i;
for (i = 0; i < joystick->naxes; ++i) {
joystick->axes[i].has_initial_value = SDL_TRUE;
}
}
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joystick->is_game_controller = SDL_IsGameController(device_index);
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/* Add joystick to list */
++joystick->ref_count;
/* Link the joystick in the list */
joystick->next = SDL_joysticks;
SDL_joysticks = joystick;
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SDL_UnlockJoysticks();
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driver->Update(joystick);
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return joystick;
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}
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int
SDL_JoystickAttachVirtual(SDL_JoystickType type,
int naxes,
int nbuttons,
int nhats)
{
#if SDL_JOYSTICK_VIRTUAL
return SDL_JoystickAttachVirtualInner(type,
naxes,
nbuttons,
nhats);
#else
return SDL_SetError("SDL not built with virtual-joystick support");
#endif
}
int
SDL_JoystickDetachVirtual(int device_index)
{
#if SDL_JOYSTICK_VIRTUAL
SDL_JoystickDriver *driver;
SDL_LockJoysticks();
if (SDL_GetDriverAndJoystickIndex(device_index, &driver, &device_index)) {
if (driver == &SDL_VIRTUAL_JoystickDriver) {
const int result = SDL_JoystickDetachVirtualInner(device_index);
SDL_UnlockJoysticks();
return result;
}
}
SDL_UnlockJoysticks();
return SDL_SetError("Virtual joystick not found at provided index");
#else
return SDL_SetError("SDL not built with virtual-joystick support");
#endif
}
SDL_bool
SDL_JoystickIsVirtual(int device_index)
{
#if SDL_JOYSTICK_VIRTUAL
SDL_JoystickDriver *driver;
int driver_device_index;
SDL_bool is_virtual = SDL_FALSE;
SDL_LockJoysticks();
if (SDL_GetDriverAndJoystickIndex(device_index, &driver, &driver_device_index)) {
if (driver == &SDL_VIRTUAL_JoystickDriver) {
is_virtual = SDL_TRUE;
}
}
SDL_UnlockJoysticks();
return is_virtual;
#else
return SDL_FALSE;
#endif
}
int
SDL_JoystickSetVirtualAxis(SDL_Joystick * joystick, int axis, Sint16 value)
{
#if SDL_JOYSTICK_VIRTUAL
return SDL_JoystickSetVirtualAxisInner(joystick, axis, value);
#else
return SDL_SetError("SDL not built with virtual-joystick support");
#endif
}
int
SDL_JoystickSetVirtualButton(SDL_Joystick * joystick, int button, Uint8 value)
{
#if SDL_JOYSTICK_VIRTUAL
return SDL_JoystickSetVirtualButtonInner(joystick, button, value);
#else
return SDL_SetError("SDL not built with virtual-joystick support");
#endif
}
int
SDL_JoystickSetVirtualHat(SDL_Joystick * joystick, int hat, Uint8 value)
{
#if SDL_JOYSTICK_VIRTUAL
return SDL_JoystickSetVirtualHatInner(joystick, hat, value);
#else
return SDL_SetError("SDL not built with virtual-joystick support");
#endif
}
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/*
* Checks to make sure the joystick is valid.
*/
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SDL_bool
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SDL_PrivateJoystickValid(SDL_Joystick * joystick)
{
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SDL_bool valid;
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if (joystick == NULL) {
SDL_SetError("Joystick hasn't been opened yet");
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valid = SDL_FALSE;
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} else {
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valid = SDL_TRUE;
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}
return valid;
}
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SDL_bool
SDL_PrivateJoystickGetAutoGamepadMapping(int device_index, SDL_GamepadMapping * out)
{
SDL_JoystickDriver *driver;
SDL_bool is_ok = SDL_FALSE;
SDL_LockJoysticks();
if (SDL_GetDriverAndJoystickIndex(device_index, &driver, &device_index)) {
is_ok = driver->GetGamepadMapping(device_index, out);
}
SDL_UnlockJoysticks();
return is_ok;
}
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/*
* Get the number of multi-dimensional axis controls on a joystick
*/
int
SDL_JoystickNumAxes(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
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return -1;
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}
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return joystick->naxes;
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}
/*
* Get the number of hats on a joystick
*/
int
SDL_JoystickNumHats(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
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return -1;
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}
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return joystick->nhats;
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}
/*
* Get the number of trackballs on a joystick
*/
int
SDL_JoystickNumBalls(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
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return -1;
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}
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return joystick->nballs;
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}
/*
* Get the number of buttons on a joystick
*/
int
SDL_JoystickNumButtons(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
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return -1;
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}
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return joystick->nbuttons;
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}
/*
* Get the current state of an axis control on a joystick
*/
Sint16
SDL_JoystickGetAxis(SDL_Joystick * joystick, int axis)
{
Sint16 state;
if (!SDL_PrivateJoystickValid(joystick)) {
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return 0;
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}
if (axis < joystick->naxes) {
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state = joystick->axes[axis].value;
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} else {
SDL_SetError("Joystick only has %d axes", joystick->naxes);
state = 0;
}
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return state;
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}
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/*
* Get the initial state of an axis control on a joystick
*/
SDL_bool
SDL_JoystickGetAxisInitialState(SDL_Joystick * joystick, int axis, Sint16 *state)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return SDL_FALSE;
}
if (axis >= joystick->naxes) {
SDL_SetError("Joystick only has %d axes", joystick->naxes);
return SDL_FALSE;
}
if (state) {
*state = joystick->axes[axis].initial_value;
}
return joystick->axes[axis].has_initial_value;
}
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693
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695
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/*
* Get the current state of a hat on a joystick
*/
Uint8
SDL_JoystickGetHat(SDL_Joystick * joystick, int hat)
{
Uint8 state;
if (!SDL_PrivateJoystickValid(joystick)) {
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return 0;
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}
if (hat < joystick->nhats) {
state = joystick->hats[hat];
} else {
SDL_SetError("Joystick only has %d hats", joystick->nhats);
state = 0;
}
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return state;
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}
/*
* Get the ball axis change since the last poll
*/
int
SDL_JoystickGetBall(SDL_Joystick * joystick, int ball, int *dx, int *dy)
{
int retval;
if (!SDL_PrivateJoystickValid(joystick)) {
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return -1;
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}
retval = 0;
if (ball < joystick->nballs) {
if (dx) {
*dx = joystick->balls[ball].dx;
}
if (dy) {
*dy = joystick->balls[ball].dy;
}
joystick->balls[ball].dx = 0;
joystick->balls[ball].dy = 0;
} else {
return SDL_SetError("Joystick only has %d balls", joystick->nballs);
}
734
return retval;
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}
/*
* Get the current state of a button on a joystick
*/
Uint8
SDL_JoystickGetButton(SDL_Joystick * joystick, int button)
{
Uint8 state;
if (!SDL_PrivateJoystickValid(joystick)) {
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return 0;
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}
if (button < joystick->nbuttons) {
state = joystick->buttons[button];
} else {
SDL_SetError("Joystick only has %d buttons", joystick->nbuttons);
state = 0;
}
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return state;
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}
/*
* Return if the joystick in question is currently attached to the system,
* \return SDL_FALSE if not plugged in, SDL_TRUE if still present.
*/
SDL_bool
SDL_JoystickGetAttached(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return SDL_FALSE;
}
768
return joystick->attached;
769
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771
772
773
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777
}
/*
* Get the instance id for this opened joystick
*/
SDL_JoystickID
SDL_JoystickInstanceID(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
778
return -1;
779
780
}
781
return joystick->instance_id;
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783
}
784
/*
785
* Return the SDL_Joystick associated with an instance id.
786
787
*/
SDL_Joystick *
788
SDL_JoystickFromInstanceID(SDL_JoystickID instance_id)
789
{
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791
SDL_Joystick *joystick;
792
SDL_LockJoysticks();
793
for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
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814
if (joystick->instance_id == instance_id) {
break;
}
}
SDL_UnlockJoysticks();
return joystick;
}
/**
* Return the SDL_Joystick associated with a player index.
*/
SDL_Joystick *
SDL_JoystickFromPlayerIndex(int player_index)
{
SDL_JoystickID instance_id;
SDL_Joystick *joystick;
SDL_LockJoysticks();
instance_id = SDL_GetJoystickIDForPlayerIndex(player_index);
for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
if (joystick->instance_id == instance_id) {
815
break;
816
817
}
}
818
SDL_UnlockJoysticks();
819
return joystick;
820
821
}
822
823
824
825
826
827
828
/*
* Get the friendly name of this joystick
*/
const char *
SDL_JoystickName(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
829
return NULL;
830
831
}
832
return joystick->name;
833
834
}
835
836
837
/**
* Get the player index of an opened joystick, or -1 if it's not available
*/
838
839
840
int
SDL_JoystickGetPlayerIndex(SDL_Joystick * joystick)
{
841
842
int player_index;
843
844
845
if (!SDL_PrivateJoystickValid(joystick)) {
return -1;
}
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
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SDL_LockJoysticks();
player_index = SDL_GetPlayerIndexForJoystickID(joystick->instance_id);
SDL_UnlockJoysticks();
return player_index;
}
/**
* Set the player index of an opened joystick
*/
void
SDL_JoystickSetPlayerIndex(SDL_Joystick * joystick, int player_index)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return;
}
SDL_LockJoysticks();
SDL_SetJoystickIDForPlayerIndex(player_index, joystick->instance_id);
SDL_UnlockJoysticks();
867
868
}
869
870
871
int
SDL_JoystickRumble(SDL_Joystick * joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble, Uint32 duration_ms)
{
872
int result;
873
874
875
876
if (!SDL_PrivateJoystickValid(joystick)) {
return -1;
}
877
878
SDL_LockJoysticks();
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
if (low_frequency_rumble == joystick->low_frequency_rumble &&
high_frequency_rumble == joystick->high_frequency_rumble) {
/* Just update the expiration */
result = 0;
} else {
result = joystick->driver->Rumble(joystick, low_frequency_rumble, high_frequency_rumble);
}
/* Save the rumble value regardless of success, so we don't spam the driver */
joystick->low_frequency_rumble = low_frequency_rumble;
joystick->high_frequency_rumble = high_frequency_rumble;
if ((low_frequency_rumble || high_frequency_rumble) && duration_ms) {
joystick->rumble_expiration = SDL_GetTicks() + SDL_min(duration_ms, SDL_MAX_RUMBLE_DURATION_MS);
if (!joystick->rumble_expiration) {
joystick->rumble_expiration = 1;
}
} else {
joystick->rumble_expiration = 0;
}
899
SDL_UnlockJoysticks();
900
901
return result;
902
903
}
904
905
906
907
908
909
910
911
912
/*
* Close a joystick previously opened with SDL_JoystickOpen()
*/
void
SDL_JoystickClose(SDL_Joystick * joystick)
{
SDL_Joystick *joysticklist;
SDL_Joystick *joysticklistprev;
913
if (!SDL_PrivateJoystickValid(joystick)) {
914
915
916
return;
}
917
SDL_LockJoysticks();
918
919
920
/* First decrement ref count */
if (--joystick->ref_count > 0) {
921
SDL_UnlockJoysticks();
922
923
924
return;
}
925
if (SDL_updating_joystick) {
926
SDL_UnlockJoysticks();
927
928
929
return;
}
930
931
932
933
if (joystick->rumble_expiration) {
SDL_JoystickRumble(joystick, 0, 0, 0);
}
934
joystick->driver->Close(joystick);
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
joystick->hwdata = NULL;
joysticklist = SDL_joysticks;
joysticklistprev = NULL;
while (joysticklist) {
if (joystick == joysticklist) {
if (joysticklistprev) {
/* unlink this entry */
joysticklistprev->next = joysticklist->next;
} else {
SDL_joysticks = joystick->next;
}
break;
}
joysticklistprev = joysticklist;
joysticklist = joysticklist->next;
}
SDL_free(joystick->name);
/* Free the data associated with this joystick */
SDL_free(joystick->axes);
SDL_free(joystick->hats);
SDL_free(joystick->balls);
SDL_free(joystick->buttons);
SDL_free(joystick);
961
962
SDL_UnlockJoysticks();
963
964
965
966
967
}
void
SDL_JoystickQuit(void)
{
968
969
int i;
970
/* Make sure we're not getting called in the middle of updating joysticks */
971
SDL_LockJoysticks();
972
973
974
975
976
while (SDL_updating_joystick) {
SDL_UnlockJoysticks();
SDL_Delay(1);
SDL_LockJoysticks();
}
977
978
979
980
981
982
983
984
/* Stop the event polling */
while (SDL_joysticks) {
SDL_joysticks->ref_count = 1;
SDL_JoystickClose(SDL_joysticks);
}
/* Quit the joystick setup */
985
986
987
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
SDL_joystick_drivers[i]->Quit();
}
988
989
990
991
992
993
if (SDL_joystick_players) {
SDL_free(SDL_joystick_players);
SDL_joystick_players = NULL;
SDL_joystick_player_count = 0;
}
994
SDL_UnlockJoysticks();
995
996
997
998
#if !SDL_EVENTS_DISABLED
SDL_QuitSubSystem(SDL_INIT_EVENTS);
#endif
999
1000
SDL_DelHintCallback(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,