SDL 2.0
SDL_sysjoystick.c
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1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2019 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 */
42static SceCtrlData pad = { .Lx = 0, .Ly = 0, .Buttons = 0 };
43static SDL_sem *pad_sem = NULL;
44static SDL_Thread *thread = NULL;
45static int running = 0;
46static 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 };
51static int analog_map[256]; /* Map analog inputs to -32768 -> 32767 */
52
53typedef struct
54{
55 int x;
56 int y;
57} point;
58
59/* 4 points define the bezier-curve. */
60static point a = { 0, 0 };
61static point b = { 50, 0 };
62static point c = { 78, 32767 };
63static point d = { 128, 32767 };
64
65/* simple linear interpolation between two points */
66static 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 */
73static 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 */
88int 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 */
106int 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
135int SDL_SYS_NumJoysticks(void)
136{
137 return 1;
138}
139
140void SDL_SYS_JoystickDetect(void)
141{
142}
143
144/* Function to get the device-dependent name of a joystick */
145const 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 */
151SDL_JoystickID SDL_SYS_GetInstanceIdOfDeviceIndex(int device_index)
152{
153 return device_index;
154}
155
156/* Function to get the device-dependent name of a joystick */
157const 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 */
171int 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 update the state of a joystick - called as a device poll.
181 * This function shouldn't update the joystick structure directly,
182 * but instead should call SDL_PrivateJoystick*() to deliver events
183 * and update joystick device state.
184 */
185void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
186{
187 int i;
188 enum PspCtrlButtons buttons;
189 enum PspCtrlButtons changed;
190 unsigned char x, y;
191 static enum PspCtrlButtons old_buttons = 0;
192 static unsigned char old_x = 0, old_y = 0;
193
194 SDL_SemWait(pad_sem);
195 buttons = pad.Buttons;
196 x = pad.Lx;
197 y = pad.Ly;
198 SDL_SemPost(pad_sem);
199
200 /* Axes */
201 if(old_x != x) {
202 SDL_PrivateJoystickAxis(joystick, 0, analog_map[x]);
203 old_x = x;
204 }
205 if(old_y != y) {
206 SDL_PrivateJoystickAxis(joystick, 1, analog_map[y]);
207 old_y = y;
208 }
209
210 /* Buttons */
211 changed = old_buttons ^ buttons;
212 old_buttons = buttons;
213 if(changed) {
214 for(i=0; i<sizeof(button_map)/sizeof(button_map[0]); i++) {
215 if(changed & button_map[i]) {
217 joystick, i,
218 (buttons & button_map[i]) ?
220 }
221 }
222 }
223
224 sceKernelDelayThread(0);
225}
226
227/* Function to close a joystick after use */
228void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
229{
230}
231
232/* Function to perform any system-specific joystick related cleanup */
233void SDL_SYS_JoystickQuit(void)
234{
235 /* Cleanup Threads and Semaphore. */
236 running = 0;
237 SDL_WaitThread(thread, NULL);
238 SDL_DestroySemaphore(pad_sem);
239}
240
241SDL_JoystickGUID SDL_SYS_JoystickGetDeviceGUID( int device_index )
242{
243 SDL_JoystickGUID guid;
244 /* the GUID is just the first 16 chars of the name for now */
245 const char *name = SDL_SYS_JoystickNameForDeviceIndex( device_index );
246 SDL_zero( guid );
247 SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) );
248 return guid;
249}
250
251SDL_JoystickGUID SDL_SYS_JoystickGetGUID(SDL_Joystick * joystick)
252{
253 SDL_JoystickGUID guid;
254 /* the GUID is just the first 16 chars of the name for now */
255 const char *name = joystick->name;
256 SDL_zero( guid );
257 SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) );
258 return guid;
259}
260
261#endif /* SDL_JOYSTICK_PSP */
262
263/* vim: ts=4 sw=4
264 */
#define SDL_SetError
#define SDL_SemPost
#define SDL_SemWait
#define SDL_strlen
#define SDL_DestroySemaphore
#define SDL_CreateSemaphore
#define SDL_WaitThread
#define SDL_memcpy
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
#define SDL_RELEASED
Definition: SDL_events.h:49
#define SDL_PRESSED
Definition: SDL_events.h:50
int SDL_PrivateJoystickAxis(SDL_Joystick *joystick, Uint8 axis, Sint16 value)
Definition: SDL_joystick.c:833
int SDL_PrivateJoystickButton(SDL_Joystick *joystick, Uint8 button, Uint8 state)
Definition: SDL_joystick.c:966
Sint32 SDL_JoystickID
Definition: SDL_joystick.h:81
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
GLdouble GLdouble t
Definition: SDL_opengl.h:2071
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
GLboolean GLboolean GLboolean b
GLuint index
GLboolean GLboolean GLboolean GLboolean a
const GLubyte * c
GLuint const GLchar * name
#define SDL_zero(x)
Definition: SDL_stdinc.h:416
#define SDL_min(x, y)
Definition: SDL_stdinc.h:406
SDL_Thread * SDL_CreateThreadInternal(int(*fn)(void *), const char *name, const size_t stacksize, void *data)
Definition: SDL_thread.c:429
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
#define NULL
Definition: begin_code.h:167
#define SDL_INLINE
Definition: begin_code.h:134