Mercurial > sdl-ios-xcode

annotate src/audio/SDL_sysaudio.h @ 3784:37c9c4590689 SDL-ryan-multiple-audio-device

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First batch of heavy lifting on supporting multiple audio devices at once. This has a long way to go yet, most of the drivers aren't updated for the new interfaces, and it's still got some obvious bugs, FIXMEs, and wistlist items. Don't use yet.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 01 Oct 2006 05:24:03 +0000
parents c121d94672cb
children 8d74a4721ca9
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is SDL_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 #ifndef _SDL_sysaudio_h
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25 #define _SDL_sysaudio_h
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26
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27 #include "SDL_mutex.h"
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28 #include "SDL_thread.h"
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29
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30 /* The SDL audio driver */
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31 typedef struct SDL_AudioDevice SDL_AudioDevice;
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32 #define _THIS SDL_AudioDevice *_this
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33
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34 /* !!! FIXME: rename these from "Audio" to "Device" ... */
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35 typedef struct SDL_AudioDriverImpl
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36 {
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37 int (*OpenAudio) (_THIS, const char *devname, int iscapture);
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38 void (*ThreadInit) (_THIS); /* Called by audio thread at start */
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39 void (*WaitAudio) (_THIS);
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40 void (*PlayAudio) (_THIS);
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41 Uint8 *(*GetAudioBuf) (_THIS);
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42 void (*WaitDone) (_THIS);
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43 void (*CloseAudio) (_THIS);
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44 void (*LockAudio) (_THIS);
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45 void (*UnlockAudio) (_THIS);
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46 } SDL_AudioDriverImpl;
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47
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48 typedef struct SDL_AudioDriver
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49 {
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50 /* * * */
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51 /* The name of this audio driver */
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52 const char *name;
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53
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54 /* * * */
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55 /* The description of this audio driver */
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56 const char *desc;
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57
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58 SDL_AudioDriverImpl impl;
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59 } SDL_AudioDriver;
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60
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61
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62 /* Define the SDL audio driver structure */
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63 struct SDL_AudioDevice
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64 {
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65 /* * * */
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66 /* Lowlevel audio implementation */
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67 const SDL_AudioDriver *driver;
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68
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69 /* * * */
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70 /* Data common to all devices */
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71
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72 /* The current audio specification (shared with audio thread) */
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73 SDL_AudioSpec spec;
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74
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75 /* An audio conversion block for audio format emulation */
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76 SDL_AudioCVT convert;
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77
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78 /* Current state flags */
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79 int enabled;
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80 int paused;
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81 int opened;
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82
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83 /* Fake audio buffer for when the audio hardware is busy */
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84 Uint8 *fake_stream;
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85
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86 /* A semaphore for locking the mixing buffers */
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87 SDL_mutex *mixer_lock;
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88
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89 /* A thread to feed the audio device */
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90 SDL_Thread *thread;
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91 Uint32 threadid;
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92
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93 /* * * */
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94 /* Data private to this driver */
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95 struct SDL_PrivateAudioData *hidden;
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96
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97 /* * * */
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98 /* The function used to dispose of this structure */
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99 void (*free) (_THIS);
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100 };
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101 #undef _THIS
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102
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103 typedef struct AudioBootStrap
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104 {
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105 const char *name;
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106 const char *desc;
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107 int (*available) (void);
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108 int (*init) (SDL_AudioDriverImpl *impl);
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109 } AudioBootStrap;
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110
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111 #if SDL_AUDIO_DRIVER_BSD
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112 extern AudioBootStrap BSD_AUDIO_bootstrap;
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113 #endif
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114 #if SDL_AUDIO_DRIVER_OSS
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115 extern AudioBootStrap DSP_bootstrap;
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116 extern AudioBootStrap DMA_bootstrap;
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117 #endif
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118 #if SDL_AUDIO_DRIVER_ALSA
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119 extern AudioBootStrap ALSA_bootstrap;
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120 #endif
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121 #if SDL_AUDIO_DRIVER_QNXNTO
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122 extern AudioBootStrap QNXNTOAUDIO_bootstrap;
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123 #endif
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124 #if SDL_AUDIO_DRIVER_SUNAUDIO
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125 extern AudioBootStrap SUNAUDIO_bootstrap;
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126 #endif
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127 #if SDL_AUDIO_DRIVER_DMEDIA
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128 extern AudioBootStrap DMEDIA_bootstrap;
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129 #endif
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130 #if SDL_AUDIO_DRIVER_ARTS
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131 extern AudioBootStrap ARTS_bootstrap;
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132 #endif
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133 #if SDL_AUDIO_DRIVER_ESD
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134 extern AudioBootStrap ESD_bootstrap;
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135 #endif
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136 #if SDL_AUDIO_DRIVER_NAS
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137 extern AudioBootStrap NAS_bootstrap;
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138 #endif
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139 #if SDL_AUDIO_DRIVER_DSOUND
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140 extern AudioBootStrap DSOUND_bootstrap;
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141 #endif
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142 #if SDL_AUDIO_DRIVER_WAVEOUT
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143 extern AudioBootStrap WAVEOUT_bootstrap;
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144 #endif
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145 #if SDL_AUDIO_DRIVER_PAUD
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146 extern AudioBootStrap Paud_bootstrap;
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147 #endif
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148 #if SDL_AUDIO_DRIVER_BAUDIO
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149 extern AudioBootStrap BAUDIO_bootstrap;
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150 #endif
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151 #if SDL_AUDIO_DRIVER_COREAUDIO
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152 extern AudioBootStrap COREAUDIO_bootstrap;
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153 #endif
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154 #if SDL_AUDIO_DRIVER_SNDMGR
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155 extern AudioBootStrap SNDMGR_bootstrap;
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156 #endif
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157 #if SDL_AUDIO_DRIVER_AHI
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158 extern AudioBootStrap AHI_bootstrap;
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159 #endif
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160 #if SDL_AUDIO_DRIVER_MINT
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161 extern AudioBootStrap MINTAUDIO_GSXB_bootstrap;
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162 extern AudioBootStrap MINTAUDIO_MCSN_bootstrap;
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163 extern AudioBootStrap MINTAUDIO_STFA_bootstrap;
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164 extern AudioBootStrap MINTAUDIO_XBIOS_bootstrap;
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165 extern AudioBootStrap MINTAUDIO_DMA8_bootstrap;
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166 #endif
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167 #if SDL_AUDIO_DRIVER_DISK
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168 extern AudioBootStrap DISKAUD_bootstrap;
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169 #endif
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170 #if SDL_AUDIO_DRIVER_DUMMY
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171 extern AudioBootStrap DUMMYAUD_bootstrap;
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172 #endif
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173 #if SDL_AUDIO_DRIVER_DC
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174 extern AudioBootStrap DCAUD_bootstrap;
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175 #endif
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176 #if SDL_AUDIO_DRIVER_MMEAUDIO
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177 extern AudioBootStrap MMEAUDIO_bootstrap;
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178 #endif
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179 #if SDL_AUDIO_DRIVER_DART
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180 extern AudioBootStrap DART_bootstrap;
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181 #endif
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182
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183 #endif /* _SDL_sysaudio_h */
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184 /* vi: set ts=4 sw=4 expandtab: */