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SDL_joystick.c
2253 lines (1932 loc) · 63.5 KB
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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_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
#if defined(__IPHONEOS__) || defined(__TVOS__)
&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;
}
/*
* 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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677
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679
/*
* 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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687
}
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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705
706
707
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715
}
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);
}
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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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735
}
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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739
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749
}
/*
* 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;
}
750
return joystick->attached;
751
752
753
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759
}
/*
* Get the instance id for this opened joystick
*/
SDL_JoystickID
SDL_JoystickInstanceID(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
760
return -1;
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762
}
763
return joystick->instance_id;
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765
}
766
/*
767
* Return the SDL_Joystick associated with an instance id.
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769
*/
SDL_Joystick *
770
SDL_JoystickFromInstanceID(SDL_JoystickID instance_id)
771
{
772
773
SDL_Joystick *joystick;
774
SDL_LockJoysticks();
775
for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
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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) {
797
break;
798
799
}
}
800
SDL_UnlockJoysticks();
801
return joystick;
802
803
}
804
805
806
807
808
809
810
/*
* Get the friendly name of this joystick
*/
const char *
SDL_JoystickName(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
811
return NULL;
812
813
}
814
return joystick->name;
815
816
}
817
818
819
/**
* Get the player index of an opened joystick, or -1 if it's not available
*/
820
821
822
int
SDL_JoystickGetPlayerIndex(SDL_Joystick * joystick)
{
823
824
int player_index;
825
826
827
if (!SDL_PrivateJoystickValid(joystick)) {
return -1;
}
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
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847
848
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();
849
850
}
851
852
853
int
SDL_JoystickRumble(SDL_Joystick * joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble, Uint32 duration_ms)
{
854
int result;
855
856
857
858
if (!SDL_PrivateJoystickValid(joystick)) {
return -1;
}
859
860
SDL_LockJoysticks();
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
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;
}
881
SDL_UnlockJoysticks();
882
883
return result;
884
885
}
886
887
888
889
890
891
892
893
894
/*
* Close a joystick previously opened with SDL_JoystickOpen()
*/
void
SDL_JoystickClose(SDL_Joystick * joystick)
{
SDL_Joystick *joysticklist;
SDL_Joystick *joysticklistprev;
895
if (!SDL_PrivateJoystickValid(joystick)) {
896
897
898
return;
}
899
SDL_LockJoysticks();
900
901
902
/* First decrement ref count */
if (--joystick->ref_count > 0) {
903
SDL_UnlockJoysticks();
904
905
906
return;
}
907
if (SDL_updating_joystick) {
908
SDL_UnlockJoysticks();
909
910
911
return;
}
912
913
914
915
if (joystick->rumble_expiration) {
SDL_JoystickRumble(joystick, 0, 0, 0);
}
916
joystick->driver->Close(joystick);
917
918
919
920
921
922
923
924
925
926
927
928
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930
931
932
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935
936
937
938
939
940
941
942
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);
943
944
SDL_UnlockJoysticks();
945
946
947
948
949
}
void
SDL_JoystickQuit(void)
{
950
951
int i;
952
/* Make sure we're not getting called in the middle of updating joysticks */
953
SDL_LockJoysticks();
954
955
956
957
958
while (SDL_updating_joystick) {
SDL_UnlockJoysticks();
SDL_Delay(1);
SDL_LockJoysticks();
}
959
960
961
962
963
964
965
966
/* Stop the event polling */
while (SDL_joysticks) {
SDL_joysticks->ref_count = 1;
SDL_JoystickClose(SDL_joysticks);
}
/* Quit the joystick setup */
967
968
969
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
SDL_joystick_drivers[i]->Quit();
}
970
971
972
973
974
975
if (SDL_joystick_players) {
SDL_free(SDL_joystick_players);
SDL_joystick_players = NULL;
SDL_joystick_player_count = 0;
}
976
SDL_UnlockJoysticks();
977
978
979
980
#if !SDL_EVENTS_DISABLED
SDL_QuitSubSystem(SDL_INIT_EVENTS);
#endif
981
982
983
984
SDL_DelHintCallback(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,
SDL_JoystickAllowBackgroundEventsChanged, NULL);
985
if (SDL_joystick_lock) {
986
SDL_mutex *mutex = SDL_joystick_lock;
987
SDL_joystick_lock = NULL;
988
SDL_DestroyMutex(mutex);
989
}
990
991
SDL_GameControllerQuitMappings();
992
993
994
995
996
997
998
999
1000
}
static SDL_bool
SDL_PrivateJoystickShouldIgnoreEvent()
{
if (SDL_joystick_allows_background_events) {
return SDL_FALSE;
}