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annotate src/audio/SDL_audiodev.c @ 3294:470d0a416aa7

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Fixed bug #714 fuzzyTew@gmail.com 2009-03-14 15:18:45 PDT patch to change HAVE_ICONV to HAVE_ICONV_H There are two separate iconv checks in configure -- one for the header file and one for the library. include/SDL_stdinc.h uses the library define to see whether or not it should reference the types defined in the header, which naturally breaks if the library exists and the header does not.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 11:04:01 +0000
parents 99210400e8b9
children f7b03b6838cb
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 static inline void
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50 test_device(const char *fname, int flags, int (*test) (int fd),
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51 char ***devices, int *devCount)
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52 {
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53 struct stat sb;
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54 if ((stat(fname, &sb) == 0) && (S_ISCHR(sb.st_mode))) {
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55 int audio_fd = open(fname, flags, 0);
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56 if ((audio_fd >= 0) && (test(audio_fd))) {
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57 void *p =
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58 SDL_realloc(*devices, ((*devCount) + 1) * sizeof(char *));
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59 if (p != NULL) {
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60 size_t len = strlen(fname) + 1;
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61 char *str = (char *) SDL_malloc(len);
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62 *devices = (char **) p;
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63 if (str != NULL) {
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64 SDL_strlcpy(str, fname, len);
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65 (*devices)[(*devCount)++] = str;
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66 }
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67 }
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68 close(audio_fd);
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69 }
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70 }
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71 }
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72
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73 void
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74 SDL_FreeUnixAudioDevices(char ***devices, int *devCount)
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75 {
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76 int i = *devCount;
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77 if ((i > 0) && (*devices != NULL)) {
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78 while (i--) {
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79 SDL_free((*devices)[i]);
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80 }
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81 }
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82
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83 if (*devices != NULL) {
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84 SDL_free(*devices);
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85 }
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86
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87 *devices = NULL;
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88 *devCount = 0;
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89 }
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90
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91 static int
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92 test_stub(int fd)
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93 {
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94 return 1;
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95 }
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96
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97 void
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98 SDL_EnumUnixAudioDevices(int flags, int classic, int (*test) (int fd),
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99 char ***devices, int *devCount)
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100 {
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101 const char *audiodev;
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102 char audiopath[1024];
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103
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104 if (test == NULL)
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105 test = test_stub;
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106
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107 /* Figure out what our audio device is */
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108 if (((audiodev = SDL_getenv("SDL_PATH_DSP")) == NULL) &&
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109 ((audiodev = SDL_getenv("AUDIODEV")) == NULL)) {
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110 if (classic) {
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111 audiodev = _PATH_DEV_AUDIO;
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112 } else {
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113 struct stat sb;
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114
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115 /* Added support for /dev/sound/\* in Linux 2.4 */
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116 if (((stat("/dev/sound", &sb) == 0) && S_ISDIR(sb.st_mode))
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117 && ((stat(_PATH_DEV_DSP24, &sb) == 0)
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118 && S_ISCHR(sb.st_mode))) {
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119 audiodev = _PATH_DEV_DSP24;
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120 } else {
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121 audiodev = _PATH_DEV_DSP;
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122 }
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123 }
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124 }
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125 test_device(audiodev, flags, test, devices, devCount);
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126
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127 if (SDL_strlen(audiodev) < (sizeof(audiopath) - 3)) {
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128 int instance = 0;
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129 while (instance++ <= 64) {
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130 SDL_snprintf(audiopath, SDL_arraysize(audiopath),
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131 "%s%d", audiodev, instance);
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132 test_device(audiopath, flags, test, devices, devCount);
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133 }
0
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134 }
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135 }
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136
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137 #endif /* Audio driver selection */
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138 /* vi: set ts=4 sw=4 expandtab: */