Mercurial > sdl-ios-xcode
annotate src/audio/SDL_audiodev.c @ 297:f6ffac90895c
Updated copyright information for 2002
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 06 Mar 2002 11:23:08 +0000 |
parents | e8157fcb3114 |
children | b8d311d90021 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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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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 */ |