annotate test/testjoystick.c @ 3796:b19680c84cdf SDL-ryan-multiple-audio-device

Bunch of 1.3 audio cleanups to remove FIXMEs, get driver specific crap out of the core and into the drivers where it belongs, and push generic responsibilities out of the drivers and into the core where they belong.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 04 Oct 2006 19:54:23 +0000
parents c121d94672cb
children 893c862eed86
rev   line source
0
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1
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2 /* Simple program to test the SDL joystick routines */
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3
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4 #include <stdio.h>
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5 #include <stdlib.h>
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6 #include <string.h>
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7
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8 #include "SDL.h"
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9
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10 #define SCREEN_WIDTH 640
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11 #define SCREEN_HEIGHT 480
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12
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13 void
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14 WatchJoystick(SDL_Joystick * joystick)
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15 {
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16 SDL_Surface *screen;
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17 const char *name;
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18 int i, done;
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19 SDL_Event event;
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20 int x, y, draw;
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21 SDL_Rect axis_area[6][2];
0
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22
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23 /* Set a video mode to display joystick axis position */
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24 screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, 16, 0);
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25 if (screen == NULL) {
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26 fprintf(stderr, "Couldn't set video mode: %s\n", SDL_GetError());
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27 return;
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28 }
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29
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30 /* Print info about the joystick we are watching */
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31 name = SDL_JoystickName(SDL_JoystickIndex(joystick));
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32 printf("Watching joystick %d: (%s)\n", SDL_JoystickIndex(joystick),
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33 name ? name : "Unknown Joystick");
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34 printf("Joystick has %d axes, %d hats, %d balls, and %d buttons\n",
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35 SDL_JoystickNumAxes(joystick), SDL_JoystickNumHats(joystick),
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36 SDL_JoystickNumBalls(joystick), SDL_JoystickNumButtons(joystick));
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37
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38 /* Initialize drawing rectangles */
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39 memset(axis_area, 0, (sizeof axis_area));
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40 draw = 0;
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41
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42 /* Loop, getting joystick events! */
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43 done = 0;
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44 while (!done) {
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45 while (SDL_PollEvent(&event)) {
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46 switch (event.type) {
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47 case SDL_JOYAXISMOTION:
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48 printf("Joystick %d axis %d value: %d\n",
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49 event.jaxis.which,
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50 event.jaxis.axis, event.jaxis.value);
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51 break;
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52 case SDL_JOYHATMOTION:
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53 printf("Joystick %d hat %d value:",
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54 event.jhat.which, event.jhat.hat);
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55 if (event.jhat.value == SDL_HAT_CENTERED)
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56 printf(" centered");
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57 if (event.jhat.value & SDL_HAT_UP)
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58 printf(" up");
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59 if (event.jhat.value & SDL_HAT_RIGHT)
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60 printf(" right");
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61 if (event.jhat.value & SDL_HAT_DOWN)
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62 printf(" down");
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63 if (event.jhat.value & SDL_HAT_LEFT)
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64 printf(" left");
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65 printf("\n");
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66 break;
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67 case SDL_JOYBALLMOTION:
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68 printf("Joystick %d ball %d delta: (%d,%d)\n",
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69 event.jball.which,
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70 event.jball.ball, event.jball.xrel, event.jball.yrel);
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71 break;
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72 case SDL_JOYBUTTONDOWN:
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73 printf("Joystick %d button %d down\n",
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74 event.jbutton.which, event.jbutton.button);
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75 break;
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76 case SDL_JOYBUTTONUP:
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77 printf("Joystick %d button %d up\n",
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78 event.jbutton.which, event.jbutton.button);
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79 break;
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80 case SDL_KEYDOWN:
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81 if (event.key.keysym.sym != SDLK_ESCAPE) {
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82 break;
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83 }
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84 /* Fall through to signal quit */
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85 case SDL_QUIT:
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86 done = 1;
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87 break;
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88 default:
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89 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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90 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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91 }
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92 /* Update visual joystick state */
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93 for (i = 0; i < SDL_JoystickNumButtons(joystick); ++i) {
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94 SDL_Rect area;
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95
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96 area.x = i * 34;
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97 area.y = SCREEN_HEIGHT - 34;
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98 area.w = 32;
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99 area.h = 32;
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100 if (SDL_JoystickGetButton(joystick, i) == SDL_PRESSED) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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101 SDL_FillRect(screen, &area, 0xFFFF);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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102 } else {
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103 SDL_FillRect(screen, &area, 0x0000);
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104 }
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105 SDL_UpdateRects(screen, 1, &area);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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106 }
0
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107
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108 for (i = 0;
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109 i < SDL_JoystickNumAxes(joystick) / 2
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110 && i < SDL_arraysize(axis_area); ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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111 /* Erase previous axes */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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112 SDL_FillRect(screen, &axis_area[i][draw], 0x0000);
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113
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114 /* Draw the X/Y axis */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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115 draw = !draw;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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116 x = (((int) SDL_JoystickGetAxis(joystick, i * 2 + 0)) + 32768);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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117 x *= SCREEN_WIDTH;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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118 x /= 65535;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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119 if (x < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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120 x = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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121 } else if (x > (SCREEN_WIDTH - 16)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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122 x = SCREEN_WIDTH - 16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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123 }
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124 y = (((int) SDL_JoystickGetAxis(joystick, i * 2 + 1)) + 32768);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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125 y *= SCREEN_HEIGHT;
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126 y /= 65535;
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127 if (y < 0) {
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128 y = 0;
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129 } else if (y > (SCREEN_HEIGHT - 16)) {
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130 y = SCREEN_HEIGHT - 16;
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131 }
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132 axis_area[i][draw].x = (Sint16) x;
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133 axis_area[i][draw].y = (Sint16) y;
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134 axis_area[i][draw].w = 16;
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135 axis_area[i][draw].h = 16;
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136 SDL_FillRect(screen, &axis_area[i][draw], 0xFFFF);
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137
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138 SDL_UpdateRects(screen, 2, axis_area[i]);
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139 }
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140 }
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141 }
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142
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143 int
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144 main(int argc, char *argv[])
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145 {
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146 const char *name;
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147 int i;
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148 SDL_Joystick *joystick;
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149
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150 /* Initialize SDL (Note: video is required to start event loop) */
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151 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) {
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152 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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153 exit(1);
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154 }
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155
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156 /* Print information about the joysticks */
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157 printf("There are %d joysticks attached\n", SDL_NumJoysticks());
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158 for (i = 0; i < SDL_NumJoysticks(); ++i) {
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159 name = SDL_JoystickName(i);
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160 printf("Joystick %d: %s\n", i, name ? name : "Unknown Joystick");
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161 }
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162
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163 if (argv[1]) {
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164 joystick = SDL_JoystickOpen(atoi(argv[1]));
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165 if (joystick == NULL) {
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166 printf("Couldn't open joystick %d: %s\n", atoi(argv[1]),
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167 SDL_GetError());
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168 } else {
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169 WatchJoystick(joystick);
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170 SDL_JoystickClose(joystick);
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171 }
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172 }
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173 SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);
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174
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175 return (0);
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176 }