Mercurial > sdl-ios-xcode

annotate src/video/dc/SDL_dcevents.c @ 2042:3908e1f808e1

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Fixed bug #292 I might be on crack here. It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and right channels of a stereo stream together, and clamps the new mono channel if it would overflow. Shouldn't it be dividing by 2 to average the two sample points instead of clamping? Otherwise the mono sample point's volume doubles in the conversion. This would also make the conversion faster, as it replaces two branches per sample frame with a bitwise shift. --ryan.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 24 Sep 2006 15:56:36 +0000
parents c121d94672cb
children e1da92da346c
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include "SDL.h"
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25 #include "../../events/SDL_sysevents.h"
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26 #include "../../events/SDL_events_c.h"
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27 #include "SDL_dcvideo.h"
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28 #include "SDL_dcevents_c.h"
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29
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30 #include <dc/maple.h>
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31 #include <dc/maple/mouse.h>
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32 #include <dc/maple/keyboard.h>
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33
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34 const static unsigned short sdl_key[] = {
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35 /*0 */ 0, 0, 0, 0, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i',
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36 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
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37 'u', 'v', 'w', 'x', 'y', 'z',
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38 /*1e */ '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
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39 /*28 */ SDLK_RETURN, SDLK_ESCAPE, SDLK_BACKSPACE, SDLK_TAB, SDLK_SPACE,
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40 SDLK_MINUS, SDLK_PLUS, SDLK_LEFTBRACKET,
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41 SDLK_RIGHTBRACKET, SDLK_BACKSLASH, 0, SDLK_SEMICOLON, SDLK_QUOTE,
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42 /*35 */ '~', SDLK_COMMA, SDLK_PERIOD, SDLK_SLASH, SDLK_CAPSLOCK,
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43 SDLK_F1, SDLK_F2, SDLK_F3, SDLK_F4, SDLK_F5, SDLK_F6, SDLK_F7, SDLK_F8,
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44 SDLK_F9, SDLK_F10, SDLK_F11, SDLK_F12,
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45 /*46 */ SDLK_PRINT, SDLK_SCROLLOCK, SDLK_PAUSE, SDLK_INSERT, SDLK_HOME,
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46 SDLK_PAGEUP, SDLK_DELETE, SDLK_END, SDLK_PAGEDOWN, SDLK_RIGHT,
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47 SDLK_LEFT, SDLK_DOWN, SDLK_UP,
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48 /*53 */ SDLK_NUMLOCK, SDLK_KP_DIVIDE, SDLK_KP_MULTIPLY, SDLK_KP_MINUS,
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49 SDLK_KP_PLUS, SDLK_KP_ENTER,
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50 SDLK_KP1, SDLK_KP2, SDLK_KP3, SDLK_KP4, SDLK_KP5, SDLK_KP6,
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51 /*5f */ SDLK_KP7, SDLK_KP8, SDLK_KP9, SDLK_KP0, SDLK_KP_PERIOD, 0
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52 /* S3 */
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53 };
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54
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55 const static unsigned short sdl_shift[] = {
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56 SDLK_LCTRL, SDLK_LSHIFT, SDLK_LALT, 0 /* S1 */ ,
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57 SDLK_RCTRL, SDLK_RSHIFT, SDLK_RALT, 0 /* S2 */ ,
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58 };
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59
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60 #define MOUSE_WHEELUP (1<<4)
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61 #define MOUSE_WHEELDOWN (1<<5)
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62
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63 static void
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64 mouse_update(void)
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65 {
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66 const static char sdl_mousebtn[] = {
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67 MOUSE_LEFTBUTTON,
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68 MOUSE_RIGHTBUTTON,
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69 MOUSE_SIDEBUTTON,
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70 MOUSE_WHEELUP,
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71 MOUSE_WHEELDOWN
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72 };
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73
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74 uint8 addr;
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75 mouse_cond_t cond;
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76
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77 static int prev_buttons;
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78 int buttons, changed;
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79 int i;
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80
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81 if ((addr = maple_first_mouse()) == 0 || mouse_get_cond(addr, &cond) < 0)
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82 return;
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83
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84 buttons = cond.buttons ^ 0xff;
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85 if (cond.dz < 0)
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86 buttons |= MOUSE_WHEELUP;
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87 if (cond.dz > 0)
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88 buttons |= MOUSE_WHEELDOWN;
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89
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90 if (cond.dx || cond.dy)
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91 SDL_PrivateMouseMotion(0, 1, cond.dx, cond.dy);
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92
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93 changed = buttons ^ prev_buttons;
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94 for (i = 0; i < sizeof(sdl_mousebtn); i++) {
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95 if (changed & sdl_mousebtn[i]) {
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96 SDL_PrivateMouseButton((buttons & sdl_mousebtn[i]) ?
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97 SDL_PRESSED : SDL_RELEASED, i, 0, 0);
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98 }
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99 }
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100 prev_buttons = buttons;
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101 }
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102
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103 static void
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104 keyboard_update(void)
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105 {
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106 static kbd_state_t old_state;
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107 static uint8 old_addr;
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108
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109 kbd_state_t *state;
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110 uint8 addr;
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111 int port, unit;
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112
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113 int shiftkeys;
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114 SDL_keysym keysym;
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115
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116 int i;
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117
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118 addr = maple_first_kb();
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119
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120 if (addr == 0)
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121 return;
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122
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123 if (addr != old_addr) {
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124 old_addr = addr;
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125 SDL_memset(&old_state, 0, sizeof(old_state));
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126 }
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127
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128 maple_raddr(addr, &port, &unit);
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129
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130 state = maple_dev_state(port, unit);
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131 if (!state)
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132 return;
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133
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134 shiftkeys = state->shift_keys ^ old_state.shift_keys;
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135 for (i = 0; i < sizeof(sdl_shift); i++) {
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136 if ((shiftkeys >> i) & 1) {
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137 keysym.sym = sdl_shift[i];
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138 SDL_PrivateKeyboard(((state->
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139 shift_keys >> i) & 1) ? SDL_PRESSED :
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140 SDL_RELEASED, &keysym);
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141 }
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142 }
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143
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144 for (i = 0; i < sizeof(sdl_key); i++) {
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145 if (state->matrix[i] != old_state.matrix[i]) {
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146 int key = sdl_key[i];
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147 if (key) {
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148 keysym.sym = key;
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149 SDL_PrivateKeyboard(state->
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150 matrix[i] ? SDL_PRESSED :
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151 SDL_RELEASED, &keysym);
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152 }
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153 }
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154 }
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155
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156 old_state = *state;
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157 }
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158
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159 void
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160 DC_PumpEvents(_THIS)
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161 {
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162 keyboard_update();
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163 mouse_update();
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164 }
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165
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166 void
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167 DC_InitOSKeymap(_THIS)
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168 {
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169 /* do nothing. */
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170 }
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171
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172 /* end of SDL_dcevents.c ... */
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173 /* vi: set ts=4 sw=4 expandtab: */