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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 Sam Lantinga |
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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. |
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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. |
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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 |
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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" |
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23 |
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24 /* Get the name of the audio device we use for output */ |
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25 |
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26 #if SDL_AUDIO_DRIVER_BSD || SDL_AUDIO_DRIVER_OSS || SDL_AUDIO_DRIVER_SUNAUDIO |
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27 |
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28 #include <fcntl.h> |
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29 #include <sys/types.h> |
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30 #include <sys/stat.h> |
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31 |
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32 #include "SDL_stdinc.h" |
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33 #include "SDL_audiodev_c.h" |
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34 |
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35 #ifndef _PATH_DEV_DSP |
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36 #if defined(__NETBSD__) || defined(__OPENBSD__) |
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37 #define _PATH_DEV_DSP "/dev/audio" |
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38 #else |
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39 #define _PATH_DEV_DSP "/dev/dsp" |
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40 #endif |
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41 #endif |
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42 #ifndef _PATH_DEV_DSP24 |
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43 #define _PATH_DEV_DSP24 "/dev/sound/dsp" |
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44 #endif |
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45 #ifndef _PATH_DEV_AUDIO |
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46 #define _PATH_DEV_AUDIO "/dev/audio" |
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47 #endif |
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48 |
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49 |
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50 int SDL_OpenAudioPath(char *path, int maxlen, int flags, int classic) |
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51 { |
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52 const char *audiodev; |
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53 int audio_fd; |
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54 char audiopath[1024]; |
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55 |
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56 /* Figure out what our audio device is */ |
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57 if ( ((audiodev=SDL_getenv("SDL_PATH_DSP")) == NULL) && |
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58 ((audiodev=SDL_getenv("AUDIODEV")) == NULL) ) { |
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59 if ( classic ) { |
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60 audiodev = _PATH_DEV_AUDIO; |
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61 } else { |
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62 struct stat sb; |
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63 |
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64 /* Added support for /dev/sound/\* in Linux 2.4 */ |
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65 if ( ((stat("/dev/sound", &sb) == 0) && S_ISDIR(sb.st_mode)) && |
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66 ((stat(_PATH_DEV_DSP24, &sb) == 0) && S_ISCHR(sb.st_mode)) ) { |
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67 audiodev = _PATH_DEV_DSP24; |
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68 } else { |
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69 audiodev = _PATH_DEV_DSP; |
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70 } |
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71 } |
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72 } |
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73 audio_fd = open(audiodev, flags, 0); |
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74 |
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75 /* If the first open fails, look for other devices */ |
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76 if ( (audio_fd < 0) && (SDL_strlen(audiodev) < (sizeof(audiopath)-3)) ) { |
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77 int exists, instance; |
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78 struct stat sb; |
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79 |
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80 instance = 1; |
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81 do { /* Don't use errno ENOENT - it may not be thread-safe */ |
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82 SDL_snprintf(audiopath, SDL_arraysize(audiopath), |
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83 "%s%d", audiodev, instance++); |
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84 exists = 0; |
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85 if ( stat(audiopath, &sb) == 0 ) { |
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86 exists = 1; |
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87 audio_fd = open(audiopath, flags, 0); |
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88 } |
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89 } while ( exists && (audio_fd < 0) ); |
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90 audiodev = audiopath; |
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91 } |
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92 if ( path != NULL ) { |
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93 SDL_strlcpy(path, audiodev, maxlen); |
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94 path[maxlen-1] = '\0'; |
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95 } |
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96 return(audio_fd); |
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97 } |
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98 |
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99 #elif SDL_AUDIO_DRIVER_PAUD |
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100 |
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101 /* Get the name of the audio device we use for output */ |
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102 |
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103 #include <sys/types.h> |
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104 #include <sys/stat.h> |
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105 |
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106 #include "SDL_stdinc.h" |
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107 #include "SDL_audiodev_c.h" |
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108 |
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109 #ifndef _PATH_DEV_DSP |
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110 #define _PATH_DEV_DSP "/dev/%caud%c/%c" |
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111 #endif |
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112 |
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113 char devsettings[][3] = |
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114 { |
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115 { 'p', '0', '1' }, { 'p', '0', '2' }, { 'p', '0', '3' }, { 'p', '0', '4' }, |
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116 { 'p', '1', '1' }, { 'p', '1', '2' }, { 'p', '1', '3' }, { 'p', '1', '4' }, |
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117 { 'p', '2', '1' }, { 'p', '2', '2' }, { 'p', '2', '3' }, { 'p', '2', '4' }, |
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118 { 'p', '3', '1' }, { 'p', '3', '2' }, { 'p', '3', '3' }, { 'p', '3', '4' }, |
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119 { 'b', '0', '1' }, { 'b', '0', '2' }, { 'b', '0', '3' }, { 'b', '0', '4' }, |
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120 { 'b', '1', '1' }, { 'b', '1', '2' }, { 'b', '1', '3' }, { 'b', '1', '4' }, |
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121 { 'b', '2', '1' }, { 'b', '2', '2' }, { 'b', '2', '3' }, { 'b', '2', '4' }, |
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122 { 'b', '3', '1' }, { 'b', '3', '2' }, { 'b', '3', '3' }, { 'b', '3', '4' }, |
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123 { '\0', '\0', '\0' } |
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124 }; |
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125 |
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126 static int OpenUserDefinedDevice(char *path, int maxlen, int flags) |
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127 { |
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128 const char *audiodev; |
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129 int audio_fd; |
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130 |
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131 /* Figure out what our audio device is */ |
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132 if ((audiodev=SDL_getenv("SDL_PATH_DSP")) == NULL) { |
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133 audiodev=SDL_getenv("AUDIODEV"); |
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134 } |
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135 if ( audiodev == NULL ) { |
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136 return -1; |
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137 } |
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138 audio_fd = open(audiodev, flags, 0); |
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139 if ( path != NULL ) { |
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140 SDL_strlcpy(path, audiodev, maxlen); |
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141 path[maxlen-1] = '\0'; |
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142 } |
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143 return audio_fd; |
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144 } |
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145 |
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146 int SDL_OpenAudioPath(char *path, int maxlen, int flags, int classic) |
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147 { |
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148 struct stat sb; |
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149 int audio_fd; |
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150 char audiopath[1024]; |
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151 int cycle; |
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152 |
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153 audio_fd = OpenUserDefinedDevice(path,maxlen,flags); |
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154 if ( audio_fd != -1 ) { |
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155 return audio_fd; |
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156 } |
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157 |
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158 cycle = 0; |
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159 while( devsettings[cycle][0] != '\0' ) { |
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160 SDL_snprintf( audiopath, SDL_arraysize(audiopath), |
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161 _PATH_DEV_DSP, |
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162 devsettings[cycle][0], |
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163 devsettings[cycle][1], |
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164 devsettings[cycle][2]); |
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165 |
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166 if ( stat(audiopath, &sb) == 0 ) { |
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167 audio_fd = open(audiopath, flags, 0); |
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168 if ( audio_fd > 0 ) { |
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169 if ( path != NULL ) { |
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170 SDL_strlcpy( path, audiopath, maxlen ); |
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171 } |
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172 return audio_fd; |
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173 } |
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174 } |
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175 } |
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176 return -1; |
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177 } |
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178 |
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179 #endif /* Audio driver selection */ |