/
SDL_joystick.c
2120 lines (1818 loc) · 60.1 KB
1
2
/*
Simple DirectMedia Layer
3
Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
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"
26
#include "SDL_atomic.h"
27
28
29
30
31
32
33
34
#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
35
#include "../video/SDL_sysvideo.h"
36
#include "hidapi/SDL_hidapijoystick_c.h"
37
38
39
/* This is included in only one place because it has a large static list of controllers */
#include "controller_type.h"
40
41
42
#ifdef __WIN32__
/* Needed for checking for input remapping programs */
43
#include "../core/windows/SDL_windows.h"
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
#undef UNICODE /* We want ASCII functions */
#include <tlhelp32.h>
#endif
static SDL_JoystickDriver *SDL_joystick_drivers[] = {
#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
65
66
67
#ifdef SDL_JOYSTICK_EMSCRIPTEN
&SDL_EMSCRIPTEN_JoystickDriver,
#endif
68
69
70
#ifdef SDL_JOYSTICK_HAIKU
&SDL_HAIKU_JoystickDriver,
#endif
71
72
73
#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
74
75
76
77
78
79
80
#ifdef SDL_JOYSTICK_HIDAPI
&SDL_HIDAPI_JoystickDriver,
#endif
#if defined(SDL_JOYSTICK_DUMMY) || defined(SDL_JOYSTICK_DISABLED)
&SDL_DUMMY_JoystickDriver
#endif
};
81
82
static SDL_bool SDL_joystick_allows_background_events = SDL_FALSE;
static SDL_Joystick *SDL_joysticks = NULL;
83
static SDL_bool SDL_updating_joystick = SDL_FALSE;
84
static SDL_mutex *SDL_joystick_lock = NULL; /* This needs to support recursive locks */
85
static SDL_atomic_t SDL_next_joystick_instance_id;
86
87
static int SDL_joystick_player_count = 0;
static SDL_JoystickID *SDL_joystick_players = NULL;
88
89
void
90
SDL_LockJoysticks(void)
91
92
93
94
95
96
{
if (SDL_joystick_lock) {
SDL_LockMutex(SDL_joystick_lock);
}
}
97
void
98
SDL_UnlockJoysticks(void)
99
100
101
102
103
104
{
if (SDL_joystick_lock) {
SDL_UnlockMutex(SDL_joystick_lock);
}
}
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
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;
149
int existing_player_index;
150
151
152
153
154
155
156
157
158
159
160
161
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;
162
163
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;
164
165
166
} else if (SDL_joystick_players[player_index] == instance_id) {
/* Joystick is already assigned the requested player index */
return SDL_TRUE;
167
168
}
169
170
171
172
173
174
/* Clear the old player index */
existing_player_index = SDL_GetPlayerIndexForJoystickID(instance_id);
if (existing_player_index >= 0) {
SDL_joystick_players[existing_player_index] = -1;
}
175
176
177
178
179
180
181
182
183
184
185
186
187
188
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;
}
189
190
static void SDLCALL
191
192
193
194
195
196
197
198
199
200
201
202
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)
{
203
int i, status;
204
205
206
SDL_GameControllerInitMappings();
207
208
209
210
211
/* Create the joystick list lock */
if (!SDL_joystick_lock) {
SDL_joystick_lock = SDL_CreateMutex();
}
212
213
214
215
216
217
218
219
220
221
/* 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 */
222
223
224
225
226
status = -1;
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
if (SDL_joystick_drivers[i]->Init() >= 0) {
status = 0;
}
227
}
228
return status;
229
230
231
232
233
234
235
236
}
/*
* Count the number of joysticks attached to the system
*/
int
SDL_NumJoysticks(void)
{
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
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;
279
280
281
282
283
284
285
286
}
/*
* Get the implementation dependent name of a joystick
*/
const char *
SDL_JoystickNameForIndex(int device_index)
{
287
288
289
290
291
SDL_JoystickDriver *driver;
const char *name = NULL;
SDL_LockJoysticks();
if (SDL_GetDriverAndJoystickIndex(device_index, &driver, &device_index)) {
292
name = driver->GetDeviceName(device_index);
293
}
294
295
296
297
SDL_UnlockJoysticks();
/* FIXME: Really we should reference count this name so it doesn't go away after unlock */
return name;
298
299
}
300
301
302
/*
* Get the player index of a joystick, or -1 if it's not available
*/
303
304
305
int
SDL_JoystickGetDevicePlayerIndex(int device_index)
{
306
int player_index;
307
308
SDL_LockJoysticks();
309
player_index = SDL_GetPlayerIndexForJoystickID(SDL_JoystickGetDeviceInstanceID(device_index));
310
311
312
313
314
SDL_UnlockJoysticks();
return player_index;
}
315
316
317
318
319
320
321
322
/*
* 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)
{
323
324
325
static Uint32 zero_centered_joysticks[] = {
MAKE_VIDPID(0x0e8f, 0x3013), /* HuiJia SNES USB adapter */
MAKE_VIDPID(0x05a0, 0x3232), /* 8Bitdo Zero Gamepad */
326
327
328
};
int i;
329
330
Uint32 id = MAKE_VIDPID(SDL_JoystickGetVendor(joystick),
SDL_JoystickGetProduct(joystick));
331
332
333
/*printf("JOYSTICK '%s' VID/PID 0x%.4x/0x%.4x AXES: %d\n", joystick->name, vendor, product, joystick->naxes);*/
334
335
336
337
338
if (joystick->naxes == 2) {
/* Assume D-pad or thumbstick style axes are centered at 0 */
return SDL_TRUE;
}
339
for (i = 0; i < SDL_arraysize(zero_centered_joysticks); ++i) {
340
if (id == zero_centered_joysticks[i]) {
341
342
343
344
345
346
return SDL_TRUE;
}
}
return SDL_FALSE;
}
347
348
349
350
351
352
353
354
355
356
/*
* 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)
{
357
358
SDL_JoystickDriver *driver;
SDL_JoystickID instance_id;
359
360
361
362
SDL_Joystick *joystick;
SDL_Joystick *joysticklist;
const char *joystickname = NULL;
363
SDL_LockJoysticks();
364
365
366
367
368
369
if (!SDL_GetDriverAndJoystickIndex(device_index, &driver, &device_index)) {
SDL_UnlockJoysticks();
return NULL;
}
370
371
joysticklist = SDL_joysticks;
/* If the joystick is already open, return it
372
373
* it is important that we have a single joystick * for each instance id
*/
374
instance_id = driver->GetDeviceInstanceID(device_index);
375
while (joysticklist) {
376
if (instance_id == joysticklist->instance_id) {
377
378
joystick = joysticklist;
++joystick->ref_count;
379
SDL_UnlockJoysticks();
380
return joystick;
381
382
383
384
385
}
joysticklist = joysticklist->next;
}
/* Create and initialize the joystick */
386
joystick = (SDL_Joystick *) SDL_calloc(sizeof(*joystick), 1);
387
388
if (joystick == NULL) {
SDL_OutOfMemory();
389
SDL_UnlockJoysticks();
390
391
return NULL;
}
392
393
joystick->driver = driver;
joystick->instance_id = instance_id;
394
joystick->attached = SDL_TRUE;
395
joystick->epowerlevel = SDL_JOYSTICK_POWER_UNKNOWN;
396
397
if (driver->Open(joystick, device_index) < 0) {
398
SDL_free(joystick);
399
SDL_UnlockJoysticks();
400
401
402
return NULL;
}
403
404
joystickname = driver->GetDeviceName(device_index);
if (joystickname) {
405
joystick->name = SDL_strdup(joystickname);
406
} else {
407
joystick->name = NULL;
408
409
410
}
joystick->guid = driver->GetDeviceGUID(device_index);
411
412
if (joystick->naxes > 0) {
413
joystick->axes = (SDL_JoystickAxisInfo *) SDL_calloc(joystick->naxes, sizeof(SDL_JoystickAxisInfo));
414
415
}
if (joystick->nhats > 0) {
416
joystick->hats = (Uint8 *) SDL_calloc(joystick->nhats, sizeof(Uint8));
417
418
}
if (joystick->nballs > 0) {
419
joystick->balls = (struct balldelta *) SDL_calloc(joystick->nballs, sizeof(*joystick->balls));
420
421
}
if (joystick->nbuttons > 0) {
422
joystick->buttons = (Uint8 *) SDL_calloc(joystick->nbuttons, sizeof(Uint8));
423
424
425
426
427
428
429
}
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);
430
SDL_UnlockJoysticks();
431
432
433
return NULL;
}
434
435
436
437
438
439
440
441
442
/* 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;
}
}
443
444
joystick->is_game_controller = SDL_IsGameController(device_index);
445
446
447
448
449
450
/* Add joystick to list */
++joystick->ref_count;
/* Link the joystick in the list */
joystick->next = SDL_joysticks;
SDL_joysticks = joystick;
451
SDL_UnlockJoysticks();
452
453
driver->Update(joystick);
454
455
return joystick;
456
457
458
459
460
461
}
/*
* Checks to make sure the joystick is valid.
*/
462
SDL_bool
463
464
SDL_PrivateJoystickValid(SDL_Joystick * joystick)
{
465
SDL_bool valid;
466
467
468
if (joystick == NULL) {
SDL_SetError("Joystick hasn't been opened yet");
469
valid = SDL_FALSE;
470
} else {
471
valid = SDL_TRUE;
472
473
474
475
476
477
478
479
480
481
482
483
}
return valid;
}
/*
* Get the number of multi-dimensional axis controls on a joystick
*/
int
SDL_JoystickNumAxes(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
484
return -1;
485
}
486
return joystick->naxes;
487
488
489
490
491
492
493
494
495
}
/*
* Get the number of hats on a joystick
*/
int
SDL_JoystickNumHats(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
496
return -1;
497
}
498
return joystick->nhats;
499
500
501
502
503
504
505
506
507
}
/*
* Get the number of trackballs on a joystick
*/
int
SDL_JoystickNumBalls(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
508
return -1;
509
}
510
return joystick->nballs;
511
512
513
514
515
516
517
518
519
}
/*
* Get the number of buttons on a joystick
*/
int
SDL_JoystickNumButtons(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
520
return -1;
521
}
522
return joystick->nbuttons;
523
524
525
526
527
528
529
530
531
532
533
}
/*
* 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)) {
534
return 0;
535
536
}
if (axis < joystick->naxes) {
537
state = joystick->axes[axis].value;
538
539
540
541
} else {
SDL_SetError("Joystick only has %d axes", joystick->naxes);
state = 0;
}
542
return state;
543
544
}
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
/*
* 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;
}
564
565
566
567
568
569
570
571
572
/*
* Get the current state of a hat on a joystick
*/
Uint8
SDL_JoystickGetHat(SDL_Joystick * joystick, int hat)
{
Uint8 state;
if (!SDL_PrivateJoystickValid(joystick)) {
573
return 0;
574
575
576
577
578
579
580
}
if (hat < joystick->nhats) {
state = joystick->hats[hat];
} else {
SDL_SetError("Joystick only has %d hats", joystick->nhats);
state = 0;
}
581
return state;
582
583
584
585
586
587
588
589
590
591
592
}
/*
* 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)) {
593
return -1;
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
}
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);
}
609
return retval;
610
611
612
613
614
615
616
617
618
619
620
}
/*
* Get the current state of a button on a joystick
*/
Uint8
SDL_JoystickGetButton(SDL_Joystick * joystick, int button)
{
Uint8 state;
if (!SDL_PrivateJoystickValid(joystick)) {
621
return 0;
622
623
624
625
626
627
628
}
if (button < joystick->nbuttons) {
state = joystick->buttons[button];
} else {
SDL_SetError("Joystick only has %d buttons", joystick->nbuttons);
state = 0;
}
629
return state;
630
631
632
633
634
635
636
637
638
639
640
641
642
}
/*
* 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;
}
643
return joystick->attached;
644
645
646
647
648
649
650
651
652
}
/*
* Get the instance id for this opened joystick
*/
SDL_JoystickID
SDL_JoystickInstanceID(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
653
return -1;
654
655
}
656
return joystick->instance_id;
657
658
}
659
/*
660
* Return the SDL_Joystick associated with an instance id.
661
662
*/
SDL_Joystick *
663
SDL_JoystickFromInstanceID(SDL_JoystickID instance_id)
664
{
665
666
SDL_Joystick *joystick;
667
SDL_LockJoysticks();
668
for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
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) {
690
break;
691
692
}
}
693
SDL_UnlockJoysticks();
694
return joystick;
695
696
}
697
698
699
700
701
702
703
/*
* Get the friendly name of this joystick
*/
const char *
SDL_JoystickName(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
704
return NULL;
705
706
}
707
return joystick->name;
708
709
}
710
711
712
/**
* Get the player index of an opened joystick, or -1 if it's not available
*/
713
714
715
int
SDL_JoystickGetPlayerIndex(SDL_Joystick * joystick)
{
716
717
int player_index;
718
719
720
if (!SDL_PrivateJoystickValid(joystick)) {
return -1;
}
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
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();
742
743
}
744
745
746
int
SDL_JoystickRumble(SDL_Joystick * joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble, Uint32 duration_ms)
{
747
int result;
748
749
750
751
if (!SDL_PrivateJoystickValid(joystick)) {
return -1;
}
752
753
SDL_LockJoysticks();
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
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;
}
774
SDL_UnlockJoysticks();
775
776
return result;
777
778
}
779
780
781
782
783
784
785
786
787
/*
* Close a joystick previously opened with SDL_JoystickOpen()
*/
void
SDL_JoystickClose(SDL_Joystick * joystick)
{
SDL_Joystick *joysticklist;
SDL_Joystick *joysticklistprev;
788
if (!SDL_PrivateJoystickValid(joystick)) {
789
790
791
return;
}
792
SDL_LockJoysticks();
793
794
795
/* First decrement ref count */
if (--joystick->ref_count > 0) {
796
SDL_UnlockJoysticks();
797
798
799
return;
}
800
if (SDL_updating_joystick) {
801
SDL_UnlockJoysticks();
802
803
804
return;
}
805
806
807
808
if (joystick->rumble_expiration) {
SDL_JoystickRumble(joystick, 0, 0, 0);
}
809
joystick->driver->Close(joystick);
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
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);
836
837
SDL_UnlockJoysticks();
838
839
840
841
842
}
void
SDL_JoystickQuit(void)
{
843
844
int i;
845
/* Make sure we're not getting called in the middle of updating joysticks */
846
SDL_LockJoysticks();
847
848
849
850
851
while (SDL_updating_joystick) {
SDL_UnlockJoysticks();
SDL_Delay(1);
SDL_LockJoysticks();
}
852
853
854
855
856
857
858
859
/* Stop the event polling */
while (SDL_joysticks) {
SDL_joysticks->ref_count = 1;
SDL_JoystickClose(SDL_joysticks);
}
/* Quit the joystick setup */
860
861
862
for (i = 0; i < SDL_arraysize(SDL_joystick_drivers); ++i) {
SDL_joystick_drivers[i]->Quit();
}
863
864
865
866
867
868
if (SDL_joystick_players) {
SDL_free(SDL_joystick_players);
SDL_joystick_players = NULL;
SDL_joystick_player_count = 0;
}
869
SDL_UnlockJoysticks();
870
871
872
873
#if !SDL_EVENTS_DISABLED
SDL_QuitSubSystem(SDL_INIT_EVENTS);
#endif
874
875
876
877
SDL_DelHintCallback(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,
SDL_JoystickAllowBackgroundEventsChanged, NULL);
878
if (SDL_joystick_lock) {
879
SDL_mutex *mutex = SDL_joystick_lock;
880
SDL_joystick_lock = NULL;
881
SDL_DestroyMutex(mutex);
882
}
883
884
SDL_GameControllerQuitMappings();
885
886
887
888
889
890
891
892
893
894
}
static SDL_bool
SDL_PrivateJoystickShouldIgnoreEvent()
{
if (SDL_joystick_allows_background_events) {
return SDL_FALSE;
}
895
896
897
if (SDL_HasWindows() && SDL_GetKeyboardFocus() == NULL) {
/* We have windows but we don't have focus, ignore the event. */
return SDL_TRUE;
898
899
900
901
902
903
}
return SDL_FALSE;
}
/* These are global for SDL_sysjoystick.c and SDL_events.c */
904
void SDL_PrivateJoystickAdded(SDL_JoystickID device_instance)
905
{
906
907
908
909
SDL_JoystickDriver *driver;
int driver_device_index;
int player_index = -1;
int device_index = SDL_JoystickGetDeviceIndexFromInstanceID(device_instance);
910
911
912
if (device_index < 0) {
return;
}
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
SDL_LockJoysticks();
if (SDL_GetDriverAndJoystickIndex(device_index, &driver, &driver_device_index)) {
player_index = driver->GetDevicePlayerIndex(driver_device_index);
}
if (player_index < 0 && SDL_IsGameController(device_index)) {
player_index = SDL_FindFreePlayerIndex();
}
if (player_index >= 0) {
SDL_SetJoystickIDForPlayerIndex(player_index, device_instance);
}
SDL_UnlockJoysticks();
#if !SDL_EVENTS_DISABLED
{
SDL_Event event;
929
930
931
932
933
934
935
event.type = SDL_JOYDEVICEADDED;
if (SDL_GetEventState(event.type) == SDL_ENABLE) {
event.jdevice.which = device_index;
SDL_PushEvent(&event);
}
936
937
938
939
940
941
942
943
944
945
946
947
948
}
#endif /* !SDL_EVENTS_DISABLED */
}
/*
* If there is an existing add event in the queue, it needs to be modified
* to have the right value for which, because the number of controllers in
* the system is now one less.
*/
static void UpdateEventsForDeviceRemoval()
{
int i, num_events;
SDL_Event *events;
949
SDL_bool isstack;
950
951
952
953
954
955
num_events = SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_JOYDEVICEADDED, SDL_JOYDEVICEADDED);
if (num_events <= 0) {
return;
}
956
events = SDL_small_alloc(SDL_Event, num_events, &isstack);
957
958
959
960
961
962
963
964
965
966
if (!events) {
return;
}
num_events = SDL_PeepEvents(events, num_events, SDL_GETEVENT, SDL_JOYDEVICEADDED, SDL_JOYDEVICEADDED);
for (i = 0; i < num_events; ++i) {
--events[i].jdevice.which;
}
SDL_PeepEvents(events, num_events, SDL_ADDEVENT, 0, 0);
967
SDL_small_free(events, isstack);
968
969
970
971
}
void SDL_PrivateJoystickRemoved(SDL_JoystickID device_instance)
{
972
SDL_Joystick *joystick;
973
int player_index;
974
975
976
977
978
979
980
981
#if !SDL_EVENTS_DISABLED
SDL_Event event;
event.type = SDL_JOYDEVICEREMOVED;
if (SDL_GetEventState(event.type) == SDL_ENABLE) {
event.jdevice.which = device_instance;
982
SDL_PushEvent(&event);
983
984
985
986
}
UpdateEventsForDeviceRemoval();
#endif /* !SDL_EVENTS_DISABLED */
987
988
989
990
991
992
993
994
995
/* Mark this joystick as no longer attached */
for (joystick = SDL_joysticks; joystick; joystick = joystick->next) {
if (joystick->instance_id == device_instance) {
joystick->attached = SDL_FALSE;
joystick->force_recentering = SDL_TRUE;
break;
}
}
996
997
998
999
1000
SDL_LockJoysticks();
player_index = SDL_GetPlayerIndexForJoystickID(device_instance);
if (player_index >= 0) {
SDL_joystick_players[player_index] = -1;