SDL  2.0
SDL_sysjoystick.c
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22 
23 #if SDL_JOYSTICK_PSP
24 
25 /* This is the PSP implementation of the SDL joystick API */
26 #include <pspctrl.h>
27 #include <pspkernel.h>
28 
29 #include <stdio.h> /* For the definition of NULL */
30 #include <stdlib.h>
31 
32 #include "../SDL_sysjoystick.h"
33 #include "../SDL_joystick_c.h"
34 
35 #include "SDL_events.h"
36 #include "SDL_error.h"
37 #include "SDL_mutex.h"
38 #include "SDL_timer.h"
39 #include "../../thread/SDL_systhread.h"
40 
41 /* Current pad state */
42 static SceCtrlData pad = { .Lx = 0, .Ly = 0, .Buttons = 0 };
43 static SDL_sem *pad_sem = NULL;
44 static SDL_Thread *thread = NULL;
45 static int running = 0;
46 static const enum PspCtrlButtons button_map[] = {
47  PSP_CTRL_TRIANGLE, PSP_CTRL_CIRCLE, PSP_CTRL_CROSS, PSP_CTRL_SQUARE,
48  PSP_CTRL_LTRIGGER, PSP_CTRL_RTRIGGER,
49  PSP_CTRL_DOWN, PSP_CTRL_LEFT, PSP_CTRL_UP, PSP_CTRL_RIGHT,
50  PSP_CTRL_SELECT, PSP_CTRL_START, PSP_CTRL_HOME, PSP_CTRL_HOLD };
51 static int analog_map[256]; /* Map analog inputs to -32768 -> 32767 */
52 
53 typedef struct
54 {
55  int x;
56  int y;
57 } point;
58 
59 /* 4 points define the bezier-curve. */
60 static point a = { 0, 0 };
61 static point b = { 50, 0 };
62 static point c = { 78, 32767 };
63 static point d = { 128, 32767 };
64 
65 /* simple linear interpolation between two points */
66 static SDL_INLINE void lerp (point *dest, point *a, point *b, float t)
67 {
68  dest->x = a->x + (b->x - a->x)*t;
69  dest->y = a->y + (b->y - a->y)*t;
70 }
71 
72 /* evaluate a point on a bezier-curve. t goes from 0 to 1.0 */
73 static int calc_bezier_y(float t)
74 {
75  point ab, bc, cd, abbc, bccd, dest;
76  lerp (&ab, &a, &b, t); /* point between a and b */
77  lerp (&bc, &b, &c, t); /* point between b and c */
78  lerp (&cd, &c, &d, t); /* point between c and d */
79  lerp (&abbc, &ab, &bc, t); /* point between ab and bc */
80  lerp (&bccd, &bc, &cd, t); /* point between bc and cd */
81  lerp (&dest, &abbc, &bccd, t); /* point on the bezier-curve */
82  return dest.y;
83 }
84 
85 /*
86  * Collect pad data about once per frame
87  */
88 int JoystickUpdate(void *data)
89 {
90  while (running) {
91  SDL_SemWait(pad_sem);
92  sceCtrlPeekBufferPositive(&pad, 1);
93  SDL_SemPost(pad_sem);
94  /* Delay 1/60th of a second */
95  sceKernelDelayThread(1000000 / 60);
96  }
97  return 0;
98 }
99 
100 
101 
102 /* Function to scan the system for joysticks.
103  * Joystick 0 should be the system default joystick.
104  * It should return number of joysticks, or -1 on an unrecoverable fatal error.
105  */
106 int SDL_SYS_JoystickInit(void)
107 {
108  int i;
109 
110  /* Setup input */
111  sceCtrlSetSamplingCycle(0);
112  sceCtrlSetSamplingMode(PSP_CTRL_MODE_ANALOG);
113 
114  /* Start thread to read data */
115  if((pad_sem = SDL_CreateSemaphore(1)) == NULL) {
116  return SDL_SetError("Can't create input semaphore");
117  }
118  running = 1;
119  if((thread = SDL_CreateThreadInternal(JoystickUpdate, "JoystickThread", 4096, NULL)) == NULL) {
120  return SDL_SetError("Can't create input thread");
121  }
122 
123  /* Create an accurate map from analog inputs (0 to 255)
124  to SDL joystick positions (-32768 to 32767) */
125  for (i = 0; i < 128; i++)
126  {
127  float t = (float)i/127.0f;
128  analog_map[i+128] = calc_bezier_y(t);
129  analog_map[127-i] = -1 * analog_map[i+128];
130  }
131 
132  return 1;
133 }
134 
135 int SDL_SYS_NumJoysticks(void)
136 {
137  return 1;
138 }
139 
140 void SDL_SYS_JoystickDetect(void)
141 {
142 }
143 
144 /* Function to get the device-dependent name of a joystick */
145 const char * SDL_SYS_JoystickNameForDeviceIndex(int device_index)
146 {
147  return "PSP builtin joypad";
148 }
149 
150 /* Function to perform the mapping from device index to the instance id for this index */
152 {
153  return device_index;
154 }
155 
156 /* Function to get the device-dependent name of a joystick */
157 const char *SDL_SYS_JoystickName(int index)
158 {
159  if (index == 0)
160  return "PSP controller";
161 
162  SDL_SetError("No joystick available with that index");
163  return(NULL);
164 }
165 
166 /* Function to open a joystick for use.
167  The joystick to open is specified by the device index.
168  This should fill the nbuttons and naxes fields of the joystick structure.
169  It returns 0, or -1 if there is an error.
170  */
171 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick, int device_index)
172 {
173  joystick->nbuttons = 14;
174  joystick->naxes = 2;
175  joystick->nhats = 0;
176 
177  return 0;
178 }
179 
180 /* Function to determine if this joystick is attached to the system right now */
181 SDL_bool SDL_SYS_JoystickAttached(SDL_Joystick *joystick)
182 {
183  return SDL_TRUE;
184 }
185 
186 /* Function to update the state of a joystick - called as a device poll.
187  * This function shouldn't update the joystick structure directly,
188  * but instead should call SDL_PrivateJoystick*() to deliver events
189  * and update joystick device state.
190  */
191 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
192 {
193  int i;
194  enum PspCtrlButtons buttons;
195  enum PspCtrlButtons changed;
196  unsigned char x, y;
197  static enum PspCtrlButtons old_buttons = 0;
198  static unsigned char old_x = 0, old_y = 0;
199 
200  SDL_SemWait(pad_sem);
201  buttons = pad.Buttons;
202  x = pad.Lx;
203  y = pad.Ly;
204  SDL_SemPost(pad_sem);
205 
206  /* Axes */
207  if(old_x != x) {
208  SDL_PrivateJoystickAxis(joystick, 0, analog_map[x]);
209  old_x = x;
210  }
211  if(old_y != y) {
212  SDL_PrivateJoystickAxis(joystick, 1, analog_map[y]);
213  old_y = y;
214  }
215 
216  /* Buttons */
217  changed = old_buttons ^ buttons;
218  old_buttons = buttons;
219  if(changed) {
220  for(i=0; i<sizeof(button_map)/sizeof(button_map[0]); i++) {
221  if(changed & button_map[i]) {
223  joystick, i,
224  (buttons & button_map[i]) ?
226  }
227  }
228  }
229 
230  sceKernelDelayThread(0);
231 }
232 
233 /* Function to close a joystick after use */
234 void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
235 {
236 }
237 
238 /* Function to perform any system-specific joystick related cleanup */
239 void SDL_SYS_JoystickQuit(void)
240 {
241  /* Cleanup Threads and Semaphore. */
242  running = 0;
243  SDL_WaitThread(thread, NULL);
244  SDL_DestroySemaphore(pad_sem);
245 }
246 
248 {
249  SDL_JoystickGUID guid;
250  /* the GUID is just the first 16 chars of the name for now */
251  const char *name = SDL_SYS_JoystickNameForDeviceIndex( device_index );
252  SDL_zero( guid );
253  SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) );
254  return guid;
255 }
256 
257 SDL_JoystickGUID SDL_SYS_JoystickGetGUID(SDL_Joystick * joystick)
258 {
259  SDL_JoystickGUID guid;
260  /* the GUID is just the first 16 chars of the name for now */
261  const char *name = joystick->name;
262  SDL_zero( guid );
263  SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) );
264  return guid;
265 }
266 
267 #endif /* SDL_JOYSTICK_PSP */
268 
269 /* vim: ts=4 sw=4
270  */
#define SDL_min(x, y)
Definition: SDL_stdinc.h:406
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
#define SDL_CreateSemaphore
int SDL_PrivateJoystickButton(SDL_Joystick *joystick, Uint8 button, Uint8 state)
Definition: SDL_joystick.c:788
GLfloat f
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
void SDL_SYS_JoystickQuit(void)
int SDL_PrivateJoystickAxis(SDL_Joystick *joystick, Uint8 axis, Sint16 value)
Definition: SDL_joystick.c:655
GLuint const GLchar * name
#define SDL_SemPost
#define SDL_memcpy
SDL_Thread * SDL_CreateThreadInternal(int(*fn)(void *), const char *name, const size_t stacksize, void *data)
Definition: SDL_thread.c:427
Sint32 SDL_JoystickID
Definition: SDL_joystick.h:81
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 SDL_AssertionHandler void SDL_SpinLock SDL_atomic_t int int return SDL_atomic_t return void void void return void return int return SDL_AudioSpec SDL_AudioSpec return int int return return int SDL_RWops int SDL_AudioSpec Uint8 ** d
SDL_bool SDL_SYS_JoystickAttached(SDL_Joystick *joystick)
const GLubyte * c
#define SDL_zero(x)
Definition: SDL_stdinc.h:416
const char * SDL_SYS_JoystickNameForDeviceIndex(int device_index)
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
GLuint index
SDL_JoystickGUID SDL_SYS_JoystickGetGUID(SDL_Joystick *joystick)
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
int SDL_SYS_JoystickInit(void)
#define NULL
Definition: begin_code.h:164
SDL_bool
Definition: SDL_stdinc.h:139
int SDL_SYS_NumJoysticks(void)
#define SDL_SetError
#define SDL_strlen
#define SDL_SemWait
#define SDL_DestroySemaphore
SDL_JoystickID SDL_SYS_GetInstanceIdOfDeviceIndex(int device_index)
int SDL_SYS_JoystickOpen(SDL_Joystick *joystick, int device_index)
#define SDL_INLINE
Definition: begin_code.h:131
#define SDL_PRESSED
Definition: SDL_events.h:50
void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
GLboolean GLboolean GLboolean GLboolean a
#define SDL_RELEASED
Definition: SDL_events.h:49
GLboolean GLboolean GLboolean b
SDL_JoystickGUID SDL_SYS_JoystickGetDeviceGUID(int device_index)
GLdouble GLdouble t
Definition: SDL_opengl.h:2071
#define SDL_WaitThread
void SDL_SYS_JoystickDetect(void)