Mercurial > sdl-ios-xcode
annotate src/audio/SDL_audiodev.c @ 1333:39b0d60d3f50
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 06 Feb 2006 08:58:44 +0000 |
| parents | c9b51268668f |
| children | 3692456e7b0f |
| 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 | |
| 23 /* Get the name of the audio device we use for output */ | |
| 24 | |
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25 #if defined(unix) || defined(__unix__) || defined(__riscos__) |
| 0 | 26 |
| 27 #include <stdlib.h> | |
| 28 #include <stdio.h> | |
| 29 #include <fcntl.h> | |
| 30 #include <sys/types.h> | |
| 31 #include <sys/stat.h> | |
| 32 #include <string.h> | |
| 33 | |
| 34 #include "SDL_audiodev_c.h" | |
| 35 | |
| 36 #ifndef _PATH_DEV_DSP | |
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Select patches included from The NetBSD Package Collection (www.pkgsrc.org)
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37 #if defined(__NetBSD__) || defined(__OpenBSD__) |
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38 #define _PATH_DEV_DSP "/dev/audio" |
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39 #else |
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40 #define _PATH_DEV_DSP "/dev/dsp" |
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41 #endif |
| 0 | 42 #endif |
| 43 #ifndef _PATH_DEV_DSP24 | |
| 44 #define _PATH_DEV_DSP24 "/dev/sound/dsp" | |
| 45 #endif | |
| 46 #ifndef _PATH_DEV_AUDIO | |
| 47 #define _PATH_DEV_AUDIO "/dev/audio" | |
| 48 #endif | |
| 49 | |
| 50 | |
| 51 int SDL_OpenAudioPath(char *path, int maxlen, int flags, int classic) | |
| 52 { | |
| 53 const char *audiodev; | |
| 54 int audio_fd; | |
| 55 char audiopath[1024]; | |
| 56 | |
| 57 /* Figure out what our audio device is */ | |
| 58 if ( ((audiodev=getenv("SDL_PATH_DSP")) == NULL) && | |
| 59 ((audiodev=getenv("AUDIODEV")) == NULL) ) { | |
| 60 if ( classic ) { | |
| 61 audiodev = _PATH_DEV_AUDIO; | |
| 62 } else { | |
| 63 struct stat sb; | |
| 64 | |
| 65 /* Added support for /dev/sound/\* in Linux 2.4 */ | |
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66 if ( ((stat("/dev/sound", &sb) == 0) && S_ISDIR(sb.st_mode)) && |
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67 ((stat(_PATH_DEV_DSP24, &sb) == 0) && S_ISCHR(sb.st_mode)) ) { |
| 0 | 68 audiodev = _PATH_DEV_DSP24; |
| 69 } else { | |
| 70 audiodev = _PATH_DEV_DSP; | |
| 71 } | |
| 72 } | |
| 73 } | |
| 74 audio_fd = open(audiodev, flags, 0); | |
| 75 | |
| 76 /* If the first open fails, look for other devices */ | |
| 77 if ( (audio_fd < 0) && (strlen(audiodev) < (sizeof(audiopath)-3)) ) { | |
| 78 int exists, instance; | |
| 79 struct stat sb; | |
| 80 | |
| 81 instance = 1; | |
| 82 do { /* Don't use errno ENOENT - it may not be thread-safe */ | |
| 83 sprintf(audiopath, "%s%d", audiodev, instance++); | |
| 84 exists = 0; | |
| 85 if ( stat(audiopath, &sb) == 0 ) { | |
| 86 exists = 1; | |
| 87 audio_fd = open(audiopath, flags, 0); | |
| 88 } | |
| 89 } while ( exists && (audio_fd < 0) ); | |
| 90 audiodev = audiopath; | |
| 91 } | |
| 92 if ( path != NULL ) { | |
| 93 strncpy(path, audiodev, maxlen); | |
| 94 path[maxlen-1] = '\0'; | |
| 95 } | |
| 96 return(audio_fd); | |
| 97 } | |
| 98 | |
| 99 #elif defined(_AIX) | |
| 100 | |
| 101 /* Get the name of the audio device we use for output */ | |
| 102 | |
| 103 #include <stdlib.h> | |
| 104 #include <sys/types.h> | |
| 105 #include <sys/stat.h> | |
| 106 #include <string.h> | |
| 107 | |
| 108 #include "SDL_audiodev_c.h" | |
| 109 | |
| 110 #ifndef _PATH_DEV_DSP | |
| 111 #define _PATH_DEV_DSP "/dev/%caud%c/%c" | |
| 112 #endif | |
| 113 | |
| 114 char devsettings[][3] = | |
| 115 { | |
| 116 { 'p', '0', '1' }, { 'p', '0', '2' }, { 'p', '0', '3' }, { 'p', '0', '4' }, | |
| 117 { 'p', '1', '1' }, { 'p', '1', '2' }, { 'p', '1', '3' }, { 'p', '1', '4' }, | |
| 118 { 'p', '2', '1' }, { 'p', '2', '2' }, { 'p', '2', '3' }, { 'p', '2', '4' }, | |
| 119 { 'p', '3', '1' }, { 'p', '3', '2' }, { 'p', '3', '3' }, { 'p', '3', '4' }, | |
| 120 { 'b', '0', '1' }, { 'b', '0', '2' }, { 'b', '0', '3' }, { 'b', '0', '4' }, | |
| 121 { 'b', '1', '1' }, { 'b', '1', '2' }, { 'b', '1', '3' }, { 'b', '1', '4' }, | |
| 122 { 'b', '2', '1' }, { 'b', '2', '2' }, { 'b', '2', '3' }, { 'b', '2', '4' }, | |
| 123 { 'b', '3', '1' }, { 'b', '3', '2' }, { 'b', '3', '3' }, { 'b', '3', '4' }, | |
| 124 { '\0', '\0', '\0' } | |
| 125 }; | |
| 126 | |
| 127 static int OpenUserDefinedDevice(char *path, int maxlen, int flags) | |
| 128 { | |
| 129 const char *audiodev; | |
| 130 int audio_fd; | |
| 131 | |
| 132 /* Figure out what our audio device is */ | |
| 133 if ((audiodev=getenv("SDL_PATH_DSP")) == NULL) { | |
| 134 audiodev=getenv("AUDIODEV"); | |
| 135 } | |
| 136 if ( audiodev == NULL ) { | |
| 137 return -1; | |
| 138 } | |
| 139 audio_fd = open(audiodev, flags, 0); | |
| 140 if ( path != NULL ) { | |
| 141 strncpy(path, audiodev, maxlen); | |
| 142 path[maxlen-1] = '\0'; | |
| 143 } | |
| 144 return audio_fd; | |
| 145 } | |
| 146 | |
| 147 int SDL_OpenAudioPath(char *path, int maxlen, int flags, int classic) | |
| 148 { | |
| 149 struct stat sb; | |
| 150 int audio_fd; | |
| 151 char audiopath[1024]; | |
| 152 int cycle; | |
| 153 | |
| 154 audio_fd = OpenUserDefinedDevice(path,maxlen,flags); | |
| 155 if ( audio_fd != -1 ) { | |
| 156 return audio_fd; | |
| 157 } | |
| 158 | |
| 159 cycle = 0; | |
| 160 while( devsettings[cycle][0] != '\0' ) { | |
| 161 sprintf( audiopath, | |
| 162 _PATH_DEV_DSP, | |
| 163 devsettings[cycle][0], | |
| 164 devsettings[cycle][1], | |
| 165 devsettings[cycle][2]); | |
| 166 | |
| 167 if ( stat(audiopath, &sb) == 0 ) { | |
| 168 audio_fd = open(audiopath, flags, 0); | |
| 169 if ( audio_fd > 0 ) { | |
| 170 if ( path != NULL ) { | |
| 171 strncpy( path, audiopath, maxlen ); | |
| 172 path[maxlen-1] = '\0'; | |
| 173 } | |
| 174 return audio_fd; | |
| 175 } | |
| 176 } | |
| 177 } | |
| 178 return -1; | |
| 179 } | |
| 180 | |
| 181 #endif /* UNIX system */ |