| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 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 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | /* Get the name of the audio device we use for output */ |
| 25 | |
| 26 | #if SDL_AUDIO_DRIVER_BSD || SDL_AUDIO_DRIVER_OSS || SDL_AUDIO_DRIVER_SUNAUDIO |
| 27 | |
| 28 | #include <fcntl.h> |
| 29 | #include <sys/types.h> |
| 30 | #include <sys/stat.h> |
| 31 | |
| 32 | #include "SDL_stdinc.h" |
| 33 | #include "SDL_audiodev_c.h" |
| 34 | |
| 35 | #ifndef _PATH_DEV_DSP |
| 36 | #if defined(__NETBSD__) || defined(__OPENBSD__) |
| 37 | #define _PATH_DEV_DSP "/dev/audio" |
| 38 | #else |
| 39 | #define _PATH_DEV_DSP "/dev/dsp" |
| 40 | #endif |
| 41 | #endif |
| 42 | #ifndef _PATH_DEV_DSP24 |
| 43 | #define _PATH_DEV_DSP24 "/dev/sound/dsp" |
| 44 | #endif |
| 45 | #ifndef _PATH_DEV_AUDIO |
| 46 | #define _PATH_DEV_AUDIO "/dev/audio" |
| 47 | #endif |
| 48 | |
| 49 | |
| 50 | int SDL_OpenAudioPath(char *path, int maxlen, int flags, int classic) |
| 51 | { |
| 52 | const char *audiodev; |
| 53 | int audio_fd; |
| 54 | char audiopath[1024]; |
| 55 | |
| 56 | /* Figure out what our audio device is */ |
| 57 | if ( ((audiodev=SDL_getenv("SDL_PATH_DSP")) == NULL) && |
| 58 | ((audiodev=SDL_getenv("AUDIODEV")) == NULL) ) { |
| 59 | if ( classic ) { |
| 60 | audiodev = _PATH_DEV_AUDIO; |
| 61 | } else { |
| 62 | struct stat sb; |
| 63 | |
| 64 | /* Added support for /dev/sound/\* in Linux 2.4 */ |
| 65 | if ( ((stat("/dev/sound", &sb) == 0) && S_ISDIR(sb.st_mode)) && |
| 66 | ((stat(_PATH_DEV_DSP24, &sb) == 0) && S_ISCHR(sb.st_mode)) ) { |
| 67 | audiodev = _PATH_DEV_DSP24; |
| 68 | } else { |
| 69 | audiodev = _PATH_DEV_DSP; |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | audio_fd = open(audiodev, flags, 0); |
| 74 | |
| 75 | /* If the first open fails, look for other devices */ |
| 76 | if ( (audio_fd < 0) && (SDL_strlen(audiodev) < (sizeof(audiopath)-3)) ) { |
| 77 | int exists, instance; |
| 78 | struct stat sb; |
| 79 | |
| 80 | instance = 1; |
| 81 | do { /* Don't use errno ENOENT - it may not be thread-safe */ |
| 82 | SDL_snprintf(audiopath, SDL_arraysize(audiopath), |
| 83 | "%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 | SDL_strlcpy(path, audiodev, maxlen); |
| 94 | path[maxlen-1] = '\0'; |
| 95 | } |
| 96 | return(audio_fd); |
| 97 | } |
| 98 | |
| 99 | #elif SDL_AUDIO_DRIVER_PAUD |
| 100 | |
| 101 | /* Get the name of the audio device we use for output */ |
| 102 | |
| 103 | #include <sys/types.h> |
| 104 | #include <sys/stat.h> |
| 105 | |
| 106 | #include "SDL_stdinc.h" |
| 107 | #include "SDL_audiodev_c.h" |
| 108 | |
| 109 | #ifndef _PATH_DEV_DSP |
| 110 | #define _PATH_DEV_DSP "/dev/%caud%c/%c" |
| 111 | #endif |
| 112 | |
| 113 | char devsettings[][3] = |
| 114 | { |
| 115 | { 'p', '0', '1' }, { 'p', '0', '2' }, { 'p', '0', '3' }, { 'p', '0', '4' }, |
| 116 | { 'p', '1', '1' }, { 'p', '1', '2' }, { 'p', '1', '3' }, { 'p', '1', '4' }, |
| 117 | { 'p', '2', '1' }, { 'p', '2', '2' }, { 'p', '2', '3' }, { 'p', '2', '4' }, |
| 118 | { 'p', '3', '1' }, { 'p', '3', '2' }, { 'p', '3', '3' }, { 'p', '3', '4' }, |
| 119 | { 'b', '0', '1' }, { 'b', '0', '2' }, { 'b', '0', '3' }, { 'b', '0', '4' }, |
| 120 | { 'b', '1', '1' }, { 'b', '1', '2' }, { 'b', '1', '3' }, { 'b', '1', '4' }, |
| 121 | { 'b', '2', '1' }, { 'b', '2', '2' }, { 'b', '2', '3' }, { 'b', '2', '4' }, |
| 122 | { 'b', '3', '1' }, { 'b', '3', '2' }, { 'b', '3', '3' }, { 'b', '3', '4' }, |
| 123 | { '\0', '\0', '\0' } |
| 124 | }; |
| 125 | |
| 126 | static int OpenUserDefinedDevice(char *path, int maxlen, int flags) |
| 127 | { |
| 128 | const char *audiodev; |
| 129 | int audio_fd; |
| 130 | |
| 131 | /* Figure out what our audio device is */ |
| 132 | if ((audiodev=SDL_getenv("SDL_PATH_DSP")) == NULL) { |
| 133 | audiodev=SDL_getenv("AUDIODEV"); |
| 134 | } |
| 135 | if ( audiodev == NULL ) { |
| 136 | return -1; |
| 137 | } |
| 138 | audio_fd = open(audiodev, flags, 0); |
| 139 | if ( path != NULL ) { |
| 140 | SDL_strlcpy(path, audiodev, maxlen); |
| 141 | path[maxlen-1] = '\0'; |
| 142 | } |
| 143 | return audio_fd; |
| 144 | } |
| 145 | |
| 146 | int SDL_OpenAudioPath(char *path, int maxlen, int flags, int classic) |
| 147 | { |
| 148 | struct stat sb; |
| 149 | int audio_fd; |
| 150 | char audiopath[1024]; |
| 151 | int cycle; |
| 152 | |
| 153 | audio_fd = OpenUserDefinedDevice(path,maxlen,flags); |
| 154 | if ( audio_fd != -1 ) { |
| 155 | return audio_fd; |
| 156 | } |
| 157 | |
| 158 | cycle = 0; |
| 159 | while( devsettings[cycle][0] != '\0' ) { |
| 160 | SDL_snprintf( audiopath, SDL_arraysize(audiopath), |
| 161 | _PATH_DEV_DSP, |
| 162 | devsettings[cycle][0], |
| 163 | devsettings[cycle][1], |
| 164 | devsettings[cycle][2]); |
| 165 | |
| 166 | if ( stat(audiopath, &sb) == 0 ) { |
| 167 | audio_fd = open(audiopath, flags, 0); |
| 168 | if ( audio_fd > 0 ) { |
| 169 | if ( path != NULL ) { |
| 170 | SDL_strlcpy( path, audiopath, maxlen ); |
| 171 | } |
| 172 | return audio_fd; |
| 173 | } |
| 174 | } |
| 175 | } |
| 176 | return -1; |
| 177 | } |
| 178 | |
| 179 | #endif /* Audio driver selection */ |