Mercurial > sdl-ios-xcode
annotate include/SDL_joystick.h @ 2661:d38309be5178 gsoc2008_audio_resampling
The windowed sinc filter generation code seems to be working fine. The FIR filtering code is also now working reasonably well. Occasionally the FIR filter will pop, but setting the normalization factor lower seems to help this. I suspect the problem is in the fixed point multiply/add. I also have a hunch the zero stuffing/sample discarding code is not correct, and I'll look at that soon to get it sorted out.
| author | Aaron Wishnick <schnarf@gmail.com> |
|---|---|
| date | Wed, 02 Jul 2008 08:04:50 +0000 |
| parents | c121d94672cb |
| children | 99210400e8b9 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 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 |
| 0 | 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 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 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 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
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23 /** |
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24 * \file SDL_joystick.h |
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25 * |
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26 * Include file for SDL joystick event handling |
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27 */ |
| 0 | 28 |
| 29 #ifndef _SDL_joystick_h | |
| 30 #define _SDL_joystick_h | |
| 31 | |
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32 #include "SDL_stdinc.h" |
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33 #include "SDL_error.h" |
| 0 | 34 |
| 35 #include "begin_code.h" | |
| 36 /* Set up for C function definitions, even when using C++ */ | |
| 37 #ifdef __cplusplus | |
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38 /* *INDENT-OFF* */ |
| 0 | 39 extern "C" { |
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40 /* *INDENT-ON* */ |
| 0 | 41 #endif |
| 42 | |
| 43 /* In order to use these functions, SDL_Init() must have been called | |
| 44 with the SDL_INIT_JOYSTICK flag. This causes SDL to scan the system | |
| 45 for joysticks, and load appropriate drivers. | |
| 46 */ | |
| 47 | |
| 48 /* The joystick structure used to identify an SDL joystick */ | |
| 49 struct _SDL_Joystick; | |
| 50 typedef struct _SDL_Joystick SDL_Joystick; | |
| 51 | |
| 52 | |
| 53 /* Function prototypes */ | |
| 54 /* | |
| 55 * Count the number of joysticks attached to the system | |
| 56 */ | |
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57 extern DECLSPEC int SDLCALL SDL_NumJoysticks(void); |
| 0 | 58 |
| 59 /* | |
| 60 * Get the implementation dependent name of a joystick. | |
| 61 * This can be called before any joysticks are opened. | |
| 62 * If no name can be found, this function returns NULL. | |
| 63 */ | |
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64 extern DECLSPEC const char *SDLCALL SDL_JoystickName(int device_index); |
| 0 | 65 |
| 66 /* | |
| 67 * Open a joystick for use - the index passed as an argument refers to | |
| 68 * the N'th joystick on the system. This index is the value which will | |
| 69 * identify this joystick in future joystick events. | |
| 70 * | |
| 71 * This function returns a joystick identifier, or NULL if an error occurred. | |
| 72 */ | |
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73 extern DECLSPEC SDL_Joystick *SDLCALL SDL_JoystickOpen(int device_index); |
| 0 | 74 |
| 75 /* | |
| 76 * Returns 1 if the joystick has been opened, or 0 if it has not. | |
| 77 */ | |
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78 extern DECLSPEC int SDLCALL SDL_JoystickOpened(int device_index); |
| 0 | 79 |
| 80 /* | |
| 81 * Get the device index of an opened joystick. | |
| 82 */ | |
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83 extern DECLSPEC int SDLCALL SDL_JoystickIndex(SDL_Joystick * joystick); |
| 0 | 84 |
| 85 /* | |
| 86 * Get the number of general axis controls on a joystick | |
| 87 */ | |
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88 extern DECLSPEC int SDLCALL SDL_JoystickNumAxes(SDL_Joystick * joystick); |
| 0 | 89 |
| 90 /* | |
| 91 * Get the number of trackballs on a joystick | |
| 92 * Joystick trackballs have only relative motion events associated | |
| 93 * with them and their state cannot be polled. | |
| 94 */ | |
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95 extern DECLSPEC int SDLCALL SDL_JoystickNumBalls(SDL_Joystick * joystick); |
| 0 | 96 |
| 97 /* | |
| 98 * Get the number of POV hats on a joystick | |
| 99 */ | |
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100 extern DECLSPEC int SDLCALL SDL_JoystickNumHats(SDL_Joystick * joystick); |
| 0 | 101 |
| 102 /* | |
| 103 * Get the number of buttons on a joystick | |
| 104 */ | |
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105 extern DECLSPEC int SDLCALL SDL_JoystickNumButtons(SDL_Joystick * joystick); |
| 0 | 106 |
| 107 /* | |
| 108 * Update the current state of the open joysticks. | |
| 109 * This is called automatically by the event loop if any joystick | |
| 110 * events are enabled. | |
| 111 */ | |
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112 extern DECLSPEC void SDLCALL SDL_JoystickUpdate(void); |
| 0 | 113 |
| 114 /* | |
| 115 * Enable/disable joystick event polling. | |
| 116 * If joystick events are disabled, you must call SDL_JoystickUpdate() | |
| 117 * yourself and check the state of the joystick when you want joystick | |
| 118 * information. | |
| 119 * The state can be one of SDL_QUERY, SDL_ENABLE or SDL_IGNORE. | |
| 120 */ | |
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121 extern DECLSPEC int SDLCALL SDL_JoystickEventState(int state); |
| 0 | 122 |
| 123 /* | |
| 124 * Get the current state of an axis control on a joystick | |
| 125 * The state is a value ranging from -32768 to 32767. | |
| 126 * The axis indices start at index 0. | |
| 127 */ | |
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128 extern DECLSPEC Sint16 SDLCALL SDL_JoystickGetAxis(SDL_Joystick * joystick, |
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129 int axis); |
| 0 | 130 |
| 131 /* | |
| 132 * Get the current state of a POV hat on a joystick | |
| 133 * The return value is one of the following positions: | |
| 134 */ | |
| 135 #define SDL_HAT_CENTERED 0x00 | |
| 136 #define SDL_HAT_UP 0x01 | |
| 137 #define SDL_HAT_RIGHT 0x02 | |
| 138 #define SDL_HAT_DOWN 0x04 | |
| 139 #define SDL_HAT_LEFT 0x08 | |
| 140 #define SDL_HAT_RIGHTUP (SDL_HAT_RIGHT|SDL_HAT_UP) | |
| 141 #define SDL_HAT_RIGHTDOWN (SDL_HAT_RIGHT|SDL_HAT_DOWN) | |
| 142 #define SDL_HAT_LEFTUP (SDL_HAT_LEFT|SDL_HAT_UP) | |
| 143 #define SDL_HAT_LEFTDOWN (SDL_HAT_LEFT|SDL_HAT_DOWN) | |
| 144 /* | |
| 145 * The hat indices start at index 0. | |
| 146 */ | |
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147 extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetHat(SDL_Joystick * joystick, |
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148 int hat); |
| 0 | 149 |
| 150 /* | |
| 151 * Get the ball axis change since the last poll | |
| 152 * This returns 0, or -1 if you passed it invalid parameters. | |
| 153 * The ball indices start at index 0. | |
| 154 */ | |
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155 extern DECLSPEC int SDLCALL SDL_JoystickGetBall(SDL_Joystick * joystick, |
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156 int ball, int *dx, int *dy); |
| 0 | 157 |
| 158 /* | |
| 159 * Get the current state of a button on a joystick | |
| 160 * The button indices start at index 0. | |
| 161 */ | |
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162 extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetButton(SDL_Joystick * joystick, |
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163 int button); |
| 0 | 164 |
| 165 /* | |
| 166 * Close a joystick previously opened with SDL_JoystickOpen() | |
| 167 */ | |
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168 extern DECLSPEC void SDLCALL SDL_JoystickClose(SDL_Joystick * joystick); |
| 0 | 169 |
| 170 | |
| 171 /* Ends C function definitions when using C++ */ | |
| 172 #ifdef __cplusplus | |
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173 /* *INDENT-OFF* */ |
| 0 | 174 } |
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175 /* *INDENT-ON* */ |
| 0 | 176 #endif |
| 177 #include "close_code.h" | |
| 178 | |
| 179 #endif /* _SDL_joystick_h */ | |
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180 |
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181 /* vi: set ts=4 sw=4 expandtab: */ |