Mercurial > sdl-ios-xcode
annotate src/audio/SDL_audiodev.c @ 896:b56dc586a5ef
Date: Tue, 16 Mar 2004 12:40:33 +0000
From: Alan Swanson
Subject: [SDL] [PATCH] Linux joystick evdev axis count fix
The event device configuration under Linux does not check the returned
ioctl value when reading the axis information. This means extra
undefined axes are returned.
Note, in EV_HandleEvents, the default for case EV_ABS is to return any
axis information which is fine as we have already checked for all valid
absolute axes. No new axes should be returned after opening the device.
(Unless, of course, the evdev allows closing and reassigning a new
device while in use and I can't believe that happens.)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 16 May 2004 22:48:06 +0000 |
| parents | b8d311d90021 |
| children | 0f3aa6ab3341 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 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 | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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Updated the source with the correct e-mail address
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Get the name of the audio device we use for output */ | |
| 29 | |
| 30 #if defined(unix) || defined(__unix__) | |
| 31 | |
| 32 #include <stdlib.h> | |
| 33 #include <stdio.h> | |
| 34 #include <fcntl.h> | |
| 35 #include <sys/types.h> | |
| 36 #include <sys/stat.h> | |
| 37 #include <string.h> | |
| 38 | |
| 39 #include "SDL_audiodev_c.h" | |
| 40 | |
| 41 #ifndef _PATH_DEV_DSP | |
|
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42 #ifdef __OpenBSD__ |
|
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43 #define _PATH_DEV_DSP "/dev/audio" |
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44 #else |
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45 #define _PATH_DEV_DSP "/dev/dsp" |
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46 #endif |
| 0 | 47 #endif |
| 48 #ifndef _PATH_DEV_DSP24 | |
| 49 #define _PATH_DEV_DSP24 "/dev/sound/dsp" | |
| 50 #endif | |
| 51 #ifndef _PATH_DEV_AUDIO | |
| 52 #define _PATH_DEV_AUDIO "/dev/audio" | |
| 53 #endif | |
| 54 | |
| 55 | |
| 56 int SDL_OpenAudioPath(char *path, int maxlen, int flags, int classic) | |
| 57 { | |
| 58 const char *audiodev; | |
| 59 int audio_fd; | |
| 60 char audiopath[1024]; | |
| 61 | |
| 62 /* Figure out what our audio device is */ | |
| 63 if ( ((audiodev=getenv("SDL_PATH_DSP")) == NULL) && | |
| 64 ((audiodev=getenv("AUDIODEV")) == NULL) ) { | |
| 65 if ( classic ) { | |
| 66 audiodev = _PATH_DEV_AUDIO; | |
| 67 } else { | |
| 68 struct stat sb; | |
| 69 | |
| 70 /* Added support for /dev/sound/\* in Linux 2.4 */ | |
| 71 if ( (stat("/dev/sound", &sb) == 0) && | |
| 72 S_ISDIR(sb.st_mode) ) { | |
| 73 audiodev = _PATH_DEV_DSP24; | |
| 74 } else { | |
| 75 audiodev = _PATH_DEV_DSP; | |
| 76 } | |
| 77 } | |
| 78 } | |
| 79 audio_fd = open(audiodev, flags, 0); | |
| 80 | |
| 81 /* If the first open fails, look for other devices */ | |
| 82 if ( (audio_fd < 0) && (strlen(audiodev) < (sizeof(audiopath)-3)) ) { | |
| 83 int exists, instance; | |
| 84 struct stat sb; | |
| 85 | |
| 86 instance = 1; | |
| 87 do { /* Don't use errno ENOENT - it may not be thread-safe */ | |
| 88 sprintf(audiopath, "%s%d", audiodev, instance++); | |
| 89 exists = 0; | |
| 90 if ( stat(audiopath, &sb) == 0 ) { | |
| 91 exists = 1; | |
| 92 audio_fd = open(audiopath, flags, 0); | |
| 93 } | |
| 94 } while ( exists && (audio_fd < 0) ); | |
| 95 audiodev = audiopath; | |
| 96 } | |
| 97 if ( path != NULL ) { | |
| 98 strncpy(path, audiodev, maxlen); | |
| 99 path[maxlen-1] = '\0'; | |
| 100 } | |
| 101 return(audio_fd); | |
| 102 } | |
| 103 | |
| 104 #elif defined(_AIX) | |
| 105 | |
| 106 /* Get the name of the audio device we use for output */ | |
| 107 | |
| 108 #include <stdlib.h> | |
| 109 #include <sys/types.h> | |
| 110 #include <sys/stat.h> | |
| 111 #include <string.h> | |
| 112 | |
| 113 #include "SDL_audiodev_c.h" | |
| 114 | |
| 115 #ifndef _PATH_DEV_DSP | |
| 116 #define _PATH_DEV_DSP "/dev/%caud%c/%c" | |
| 117 #endif | |
| 118 | |
| 119 char devsettings[][3] = | |
| 120 { | |
| 121 { 'p', '0', '1' }, { 'p', '0', '2' }, { 'p', '0', '3' }, { 'p', '0', '4' }, | |
| 122 { 'p', '1', '1' }, { 'p', '1', '2' }, { 'p', '1', '3' }, { 'p', '1', '4' }, | |
| 123 { 'p', '2', '1' }, { 'p', '2', '2' }, { 'p', '2', '3' }, { 'p', '2', '4' }, | |
| 124 { 'p', '3', '1' }, { 'p', '3', '2' }, { 'p', '3', '3' }, { 'p', '3', '4' }, | |
| 125 { 'b', '0', '1' }, { 'b', '0', '2' }, { 'b', '0', '3' }, { 'b', '0', '4' }, | |
| 126 { 'b', '1', '1' }, { 'b', '1', '2' }, { 'b', '1', '3' }, { 'b', '1', '4' }, | |
| 127 { 'b', '2', '1' }, { 'b', '2', '2' }, { 'b', '2', '3' }, { 'b', '2', '4' }, | |
| 128 { 'b', '3', '1' }, { 'b', '3', '2' }, { 'b', '3', '3' }, { 'b', '3', '4' }, | |
| 129 { '\0', '\0', '\0' } | |
| 130 }; | |
| 131 | |
| 132 static int OpenUserDefinedDevice(char *path, int maxlen, int flags) | |
| 133 { | |
| 134 const char *audiodev; | |
| 135 int audio_fd; | |
| 136 | |
| 137 /* Figure out what our audio device is */ | |
| 138 if ((audiodev=getenv("SDL_PATH_DSP")) == NULL) { | |
| 139 audiodev=getenv("AUDIODEV"); | |
| 140 } | |
| 141 if ( audiodev == NULL ) { | |
| 142 return -1; | |
| 143 } | |
| 144 audio_fd = open(audiodev, flags, 0); | |
| 145 if ( path != NULL ) { | |
| 146 strncpy(path, audiodev, maxlen); | |
| 147 path[maxlen-1] = '\0'; | |
| 148 } | |
| 149 return audio_fd; | |
| 150 } | |
| 151 | |
| 152 int SDL_OpenAudioPath(char *path, int maxlen, int flags, int classic) | |
| 153 { | |
| 154 struct stat sb; | |
| 155 int audio_fd; | |
| 156 char audiopath[1024]; | |
| 157 int cycle; | |
| 158 | |
| 159 audio_fd = OpenUserDefinedDevice(path,maxlen,flags); | |
| 160 if ( audio_fd != -1 ) { | |
| 161 return audio_fd; | |
| 162 } | |
| 163 | |
| 164 cycle = 0; | |
| 165 while( devsettings[cycle][0] != '\0' ) { | |
| 166 sprintf( audiopath, | |
| 167 _PATH_DEV_DSP, | |
| 168 devsettings[cycle][0], | |
| 169 devsettings[cycle][1], | |
| 170 devsettings[cycle][2]); | |
| 171 | |
| 172 if ( stat(audiopath, &sb) == 0 ) { | |
| 173 audio_fd = open(audiopath, flags, 0); | |
| 174 if ( audio_fd > 0 ) { | |
| 175 if ( path != NULL ) { | |
| 176 strncpy( path, audiopath, maxlen ); | |
| 177 path[maxlen-1] = '\0'; | |
| 178 } | |
| 179 return audio_fd; | |
| 180 } | |
| 181 } | |
| 182 } | |
| 183 return -1; | |
| 184 } | |
| 185 | |
| 186 #endif /* UNIX system */ |