Mercurial > sdl-ios-xcode
annotate src/video/ggi/SDL_ggievents.c @ 4216:5b99971a27b4 SDL-1.2
Fixed bug #698
Hans de Goede 2009-02-13 01:10:52 PST
Since the new "glitch free" version of pulseaudio (used in Fedora 10 amongst
others), the sound of SDL using apps (like a simple playmus call) has been
crackling.
While looking in to fixing this I noticed that the current pulseaudio code in
SDL uses pa_simple. However pa_simple uses a thread to pump pulseaudio events
and ipc, given that SDL already has its own thread for audio handling this is
clearly suboptimal, leading to unnecessary context switching IPC, etc. Also
pa_simple does not allow one to implement the WaitAudio() callback for SDL
audiodrivers properly.
Given that my work is mostly a rewrite (although some original pieces remain)
I'm attaching the new .c and .h file, as that is easier to review then the huge
diff.
Let me know if you also want the diff.
This new version has the following features:
-no longer use an additional thread next to the SDL sound thread
-do not crackle with glitch free audio
-when used with a newer pulse, which does glitch free audio, the total latency
is
the same as with the alsa driver
-proper WaitAudio() implementation, saving another mixlen worth of latency
-adds a WaitDone() implementation
This patch has been written in consultancy with Lennart Poetering (the
pulseaudio author) and has been reviewed by him for correct use of the pa API.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 21 Sep 2009 09:27:08 +0000 |
| parents | a1b03ba2fcd0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 SDL - Simple DirectMedia Layer |
| 4159 | 3 Copyright (C) 1997-2009 Sam Lantinga |
| 0 | 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. |
| 0 | 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. |
| 0 | 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 |
| 0 | 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" |
| 0 | 23 |
| 24 /* Handle the event stream, converting GGI events into SDL events */ | |
| 25 | |
| 26 #include <sys/types.h> | |
| 27 #include <sys/time.h> | |
| 28 #include <unistd.h> | |
| 29 #include <fcntl.h> | |
| 30 #include <termios.h> | |
| 31 | |
| 32 #include <ggi/keyboard.h> | |
| 33 | |
| 34 #include "SDL_ggikeys.h" | |
| 35 | |
| 36 #include "SDL.h" | |
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37 #include "../SDL_sysvideo.h" |
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38 #include "../../events/SDL_sysevents.h" |
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39 #include "../../events/SDL_events_c.h" |
| 0 | 40 #include "SDL_ggivideo.h" |
| 41 #include "SDL_ggievents_c.h" | |
| 42 | |
| 43 /* The translation tables from a GGI keycode to a SDL keysym */ | |
| 44 static SDLKey keymap[128]; | |
| 45 static SDL_keysym *GGI_TranslateKey(ggi_event *ev, SDL_keysym *keysym); | |
| 46 | |
| 47 static int posted = 0; | |
| 48 | |
| 49 void GGI_PumpEvents(_THIS) | |
| 50 { | |
| 51 struct timeval *tvp, tv = { 0, 0 }; | |
| 52 ggi_event ev; | |
| 53 | |
| 54 tvp = &tv; | |
| 55 | |
| 56 /* ggiFlush(VIS); */ | |
| 57 | |
| 58 while (ggiEventPoll(VIS, emAll, tvp)) | |
| 59 /* while (ggiEventPoll(VIS, (emKeyboard | emPointer | emCommand), tvp)) */ | |
| 60 { | |
| 61 int queueevent_mouse = 0, queueevent_kbd = 0; | |
| 62 static int buttons = 0; | |
| 63 static int mouse_x = 0, mouse_y = 0, mouse_z = 0; | |
| 64 int x = 0, y = 0, z = 0, rx = 0, ry = 0, rz = 0; | |
| 65 int pressed_mouse, pressed_kbd; | |
| 66 SDL_keysym keysym; | |
| 67 | |
| 68 posted = 0; | |
| 69 | |
| 70 /* FIXME: We do not actually want all events, only | |
| 71 * mouse and keyboard events. Having to handle all | |
| 72 * events will slow things down. */ | |
| 73 | |
| 74 ggiEventRead(VIS, &ev, emAll); | |
| 75 /* ggiEventRead(VIS, &ev, (emKeyboard | emPointer | emCommand)); */ | |
| 76 | |
| 77 switch (ev.any.type) | |
| 78 { | |
| 79 case evPtrRelative: | |
| 80 x = ev.pmove.x; | |
| 81 y = ev.pmove.y; | |
| 82 z = ev.pmove.wheel; | |
| 83 posted += SDL_PrivateMouseMotion(0, 1, x, y); | |
| 84 break; | |
| 85 case evPtrAbsolute: | |
| 86 if (mouse_x != ev.pmove.x || mouse_y != ev.pmove.y || mouse_z != ev.pmove.wheel) | |
| 87 { | |
| 88 x = ev.pmove.x - mouse_x; | |
| 89 y = ev.pmove.y - mouse_y; | |
| 90 z = ev.pmove.wheel - mouse_z; | |
| 91 mouse_x = ev.pmove.x; | |
| 92 mouse_y = ev.pmove.y; | |
| 93 mouse_z = ev.pmove.wheel; | |
| 94 posted += SDL_PrivateMouseMotion(0, 1, x, y); | |
| 95 } | |
| 96 break; | |
| 97 case evPtrButtonPress: | |
| 98 posted += SDL_PrivateMouseButton(SDL_PRESSED, ev.pbutton.button, 0, 0); | |
| 99 break; | |
| 100 case evPtrButtonRelease: | |
| 101 posted += SDL_PrivateMouseButton(SDL_RELEASED, ev.pbutton.button, 0, 0); | |
| 102 break; | |
| 103 case evKeyPress: | |
| 104 case evKeyRepeat: | |
| 105 posted += SDL_PrivateKeyboard(SDL_PRESSED, GGI_TranslateKey(&ev, &keysym)); | |
| 106 break; | |
| 107 case evKeyRelease: | |
| 108 posted += SDL_PrivateKeyboard(SDL_RELEASED, GGI_TranslateKey(&ev, &keysym)); | |
| 109 break; | |
| 110 case evCommand: | |
| 111 fprintf(stderr, "Command event %x recieved\n", ev.cmd.code); | |
| 112 break; | |
| 113 default: | |
| 114 fprintf(stderr, "Unhandled event type %d\n", ev.any.type); | |
| 115 break; | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 } | |
| 120 | |
| 121 void GGI_InitOSKeymap(_THIS) | |
| 122 { | |
| 123 int i; | |
| 124 | |
| 125 /* Initialize the GGI key translation table */ | |
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126 for ( i=0; i<SDL_arraysize(keymap); ++i ) |
| 0 | 127 keymap[i] = SDLK_UNKNOWN; |
| 128 | |
| 129 keymap[SCANCODE_ESCAPE] = SDLK_ESCAPE; | |
| 130 keymap[SCANCODE_1] = SDLK_1; | |
| 131 keymap[SCANCODE_2] = SDLK_2; | |
| 132 keymap[SCANCODE_3] = SDLK_3; | |
| 133 keymap[SCANCODE_4] = SDLK_4; | |
| 134 keymap[SCANCODE_5] = SDLK_5; | |
| 135 keymap[SCANCODE_6] = SDLK_6; | |
| 136 keymap[SCANCODE_7] = SDLK_7; | |
| 137 keymap[SCANCODE_8] = SDLK_8; | |
| 138 keymap[SCANCODE_9] = SDLK_9; | |
| 139 keymap[SCANCODE_0] = SDLK_0; | |
| 140 keymap[SCANCODE_MINUS] = SDLK_MINUS; | |
| 141 keymap[SCANCODE_EQUAL] = SDLK_EQUALS; | |
| 142 keymap[SCANCODE_BACKSPACE] = SDLK_BACKSPACE; | |
| 143 keymap[SCANCODE_TAB] = SDLK_TAB; | |
| 144 keymap[SCANCODE_Q] = SDLK_q; | |
| 145 keymap[SCANCODE_W] = SDLK_w; | |
| 146 keymap[SCANCODE_E] = SDLK_e; | |
| 147 keymap[SCANCODE_R] = SDLK_r; | |
| 148 keymap[SCANCODE_T] = SDLK_t; | |
| 149 keymap[SCANCODE_Y] = SDLK_y; | |
| 150 keymap[SCANCODE_U] = SDLK_u; | |
| 151 keymap[SCANCODE_I] = SDLK_i; | |
| 152 keymap[SCANCODE_O] = SDLK_o; | |
| 153 keymap[SCANCODE_P] = SDLK_p; | |
| 154 keymap[SCANCODE_BRACKET_LEFT] = SDLK_LEFTBRACKET; | |
| 155 keymap[SCANCODE_BRACKET_RIGHT] = SDLK_RIGHTBRACKET; | |
| 156 keymap[SCANCODE_ENTER] = SDLK_RETURN; | |
| 157 keymap[SCANCODE_LEFTCONTROL] = SDLK_LCTRL; | |
| 158 keymap[SCANCODE_A] = SDLK_a; | |
| 159 keymap[SCANCODE_S] = SDLK_s; | |
| 160 keymap[SCANCODE_D] = SDLK_d; | |
| 161 keymap[SCANCODE_F] = SDLK_f; | |
| 162 keymap[SCANCODE_G] = SDLK_g; | |
| 163 keymap[SCANCODE_H] = SDLK_h; | |
| 164 keymap[SCANCODE_J] = SDLK_j; | |
| 165 keymap[SCANCODE_K] = SDLK_k; | |
| 166 keymap[SCANCODE_L] = SDLK_l; | |
| 167 keymap[SCANCODE_SEMICOLON] = SDLK_SEMICOLON; | |
| 168 keymap[SCANCODE_APOSTROPHE] = SDLK_QUOTE; | |
| 169 keymap[SCANCODE_GRAVE] = SDLK_BACKQUOTE; | |
| 170 keymap[SCANCODE_LEFTSHIFT] = SDLK_LSHIFT; | |
| 171 keymap[SCANCODE_BACKSLASH] = SDLK_BACKSLASH; | |
| 172 keymap[SCANCODE_Z] = SDLK_z; | |
| 173 keymap[SCANCODE_X] = SDLK_x; | |
| 174 keymap[SCANCODE_C] = SDLK_c; | |
| 175 keymap[SCANCODE_V] = SDLK_v; | |
| 176 keymap[SCANCODE_B] = SDLK_b; | |
| 177 keymap[SCANCODE_N] = SDLK_n; | |
| 178 keymap[SCANCODE_M] = SDLK_m; | |
| 179 keymap[SCANCODE_COMMA] = SDLK_COMMA; | |
| 180 keymap[SCANCODE_PERIOD] = SDLK_PERIOD; | |
| 181 keymap[SCANCODE_SLASH] = SDLK_SLASH; | |
| 182 keymap[SCANCODE_RIGHTSHIFT] = SDLK_RSHIFT; | |
| 183 keymap[SCANCODE_KEYPADMULTIPLY] = SDLK_KP_MULTIPLY; | |
| 184 keymap[SCANCODE_LEFTALT] = SDLK_LALT; | |
| 185 keymap[SCANCODE_SPACE] = SDLK_SPACE; | |
| 186 keymap[SCANCODE_CAPSLOCK] = SDLK_CAPSLOCK; | |
| 187 keymap[SCANCODE_F1] = SDLK_F1; | |
| 188 keymap[SCANCODE_F2] = SDLK_F2; | |
| 189 keymap[SCANCODE_F3] = SDLK_F3; | |
| 190 keymap[SCANCODE_F4] = SDLK_F4; | |
| 191 keymap[SCANCODE_F5] = SDLK_F5; | |
| 192 keymap[SCANCODE_F6] = SDLK_F6; | |
| 193 keymap[SCANCODE_F7] = SDLK_F7; | |
| 194 keymap[SCANCODE_F8] = SDLK_F8; | |
| 195 keymap[SCANCODE_F9] = SDLK_F9; | |
| 196 keymap[SCANCODE_F10] = SDLK_F10; | |
| 197 keymap[SCANCODE_NUMLOCK] = SDLK_NUMLOCK; | |
| 198 keymap[SCANCODE_SCROLLLOCK] = SDLK_SCROLLOCK; | |
| 199 keymap[SCANCODE_KEYPAD7] = SDLK_KP7; | |
| 200 keymap[SCANCODE_CURSORUPLEFT] = SDLK_KP7; | |
| 201 keymap[SCANCODE_KEYPAD8] = SDLK_KP8; | |
| 202 keymap[SCANCODE_CURSORUP] = SDLK_KP8; | |
| 203 keymap[SCANCODE_KEYPAD9] = SDLK_KP9; | |
| 204 keymap[SCANCODE_CURSORUPRIGHT] = SDLK_KP9; | |
| 205 keymap[SCANCODE_KEYPADMINUS] = SDLK_KP_MINUS; | |
| 206 keymap[SCANCODE_KEYPAD4] = SDLK_KP4; | |
| 207 keymap[SCANCODE_CURSORLEFT] = SDLK_KP4; | |
| 208 keymap[SCANCODE_KEYPAD5] = SDLK_KP5; | |
| 209 keymap[SCANCODE_KEYPAD6] = SDLK_KP6; | |
| 210 keymap[SCANCODE_CURSORRIGHT] = SDLK_KP6; | |
| 211 keymap[SCANCODE_KEYPADPLUS] = SDLK_KP_PLUS; | |
| 212 keymap[SCANCODE_KEYPAD1] = SDLK_KP1; | |
| 213 keymap[SCANCODE_CURSORDOWNLEFT] = SDLK_KP1; | |
| 214 keymap[SCANCODE_KEYPAD2] = SDLK_KP2; | |
| 215 keymap[SCANCODE_CURSORDOWN] = SDLK_KP2; | |
| 216 keymap[SCANCODE_KEYPAD3] = SDLK_KP3; | |
| 217 keymap[SCANCODE_CURSORDOWNRIGHT] = SDLK_KP3; | |
| 218 keymap[SCANCODE_KEYPAD0] = SDLK_KP0; | |
| 219 keymap[SCANCODE_KEYPADPERIOD] = SDLK_KP_PERIOD; | |
| 220 keymap[SCANCODE_LESS] = SDLK_LESS; | |
| 221 keymap[SCANCODE_F11] = SDLK_F11; | |
| 222 keymap[SCANCODE_F12] = SDLK_F12; | |
| 223 keymap[SCANCODE_KEYPADENTER] = SDLK_KP_ENTER; | |
| 224 keymap[SCANCODE_RIGHTCONTROL] = SDLK_RCTRL; | |
| 225 keymap[SCANCODE_CONTROL] = SDLK_RCTRL; | |
| 226 keymap[SCANCODE_KEYPADDIVIDE] = SDLK_KP_DIVIDE; | |
| 227 keymap[SCANCODE_PRINTSCREEN] = SDLK_PRINT; | |
| 228 keymap[SCANCODE_RIGHTALT] = SDLK_RALT; | |
| 229 keymap[SCANCODE_BREAK] = SDLK_BREAK; | |
| 230 keymap[SCANCODE_BREAK_ALTERNATIVE] = SDLK_UNKNOWN; | |
| 231 keymap[SCANCODE_HOME] = SDLK_HOME; | |
| 232 keymap[SCANCODE_CURSORBLOCKUP] = SDLK_UP; | |
| 233 keymap[SCANCODE_PAGEUP] = SDLK_PAGEUP; | |
| 234 keymap[SCANCODE_CURSORBLOCKLEFT] = SDLK_LEFT; | |
| 235 keymap[SCANCODE_CURSORBLOCKRIGHT] = SDLK_RIGHT; | |
| 236 keymap[SCANCODE_END] = SDLK_END; | |
| 237 keymap[SCANCODE_CURSORBLOCKDOWN] = SDLK_DOWN; | |
| 238 keymap[SCANCODE_PAGEDOWN] = SDLK_PAGEDOWN; | |
| 239 keymap[SCANCODE_INSERT] = SDLK_INSERT; | |
| 240 keymap[SCANCODE_REMOVE] = SDLK_DELETE; | |
| 241 keymap[119] = SDLK_PAUSE; | |
| 242 keymap[SCANCODE_RIGHTWIN] = SDLK_RSUPER; | |
| 243 keymap[SCANCODE_LEFTWIN] = SDLK_LSUPER; | |
| 244 keymap[127] = SDLK_MENU; | |
| 245 } | |
| 246 | |
| 247 | |
| 248 | |
| 249 static SDL_keysym *GGI_TranslateKey(gii_event *ev, SDL_keysym *keysym) | |
| 250 { | |
| 251 /* Set the keysym information */ | |
| 252 keysym->scancode = ev->key.button; | |
| 253 keysym->sym = keymap[ev->key.button]; | |
| 254 keysym->mod = KMOD_NONE; | |
| 255 | |
| 256 /* If UNICODE is on, get the UNICODE value for the key */ | |
| 257 keysym->unicode = 0; | |
| 258 if (SDL_TranslateUNICODE) | |
| 259 { | |
| 260 keysym->unicode = GII_UNICODE(ev->key.sym); | |
| 261 } | |
| 262 | |
| 263 return keysym; | |
| 264 } |