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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #ifndef _SDL_sysaudio_h
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29 #define _SDL_sysaudio_h
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30
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31 #include "SDL_mutex.h"
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32 #include "SDL_thread.h"
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33
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34 #include <exec/exec.h>
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35 #include <dos/dos.h>
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36 #ifdef __SASC
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37 #include <proto/exec.h>
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38 #else
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39 #include <inline/exec.h>
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40 #endif
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41
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42 #include <devices/ahi.h>
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43 #include "mydebug.h"
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44
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45 /* The SDL audio driver */
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46 typedef struct SDL_AudioDevice SDL_AudioDevice;
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47
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48 /* Define the SDL audio driver structure */
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49 #define _THIS SDL_AudioDevice *_this
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50 #ifndef _STATUS
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51 #define _STATUS SDL_status *status
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52 #endif
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53 struct SDL_AudioDevice {
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54 /* * * */
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55 /* The name of this audio driver */
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56 const char *name;
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57
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58 /* * * */
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59 /* Public driver functions */
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60 int (*OpenAudio)(_THIS, SDL_AudioSpec *spec);
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61 void (*ThreadInit)(_THIS); /* Called by audio thread at start */
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62 void (*WaitAudio)(_THIS);
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63 void (*PlayAudio)(_THIS);
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64 Uint8 *(*GetAudioBuf)(_THIS);
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65 void (*WaitDone)(_THIS);
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66 void (*CloseAudio)(_THIS);
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67
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68 /* * * */
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69 /* Data common to all devices */
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70
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71 /* The current audio specification (shared with audio thread) */
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72 SDL_AudioSpec spec;
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73
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74 /* An audio conversion block for audio format emulation */
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75 SDL_AudioCVT convert;
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76
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77 /* Current state flags */
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78 int enabled;
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79 int paused;
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80
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81 /* Fake audio buffer for when the audio hardware is busy */
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82 Uint8 *fake_stream;
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83
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84 /* A semaphore for locking the mixing buffers */
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85 struct SignalSemaphore mixer_lock;
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86
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87 /* A thread to feed the audio device */
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88 SDL_Thread *thread;
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89 Uint32 threadid;
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90
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91 /* * * */
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92 /* Data private to this driver */
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93 struct SDL_PrivateAudioData *hidden;
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94
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95 /* * * */
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96 /* The function used to dispose of this structure */
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97 void (*free)(_THIS);
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98 };
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99 #undef _THIS
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100
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101 typedef struct AudioBootStrap {
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102 const char *name;
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103 int (*available)(void);
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104 SDL_AudioDevice *(*create)(int devindex);
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105 } AudioBootStrap;
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106
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107 #ifdef ESD_SUPPORT
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108 extern AudioBootStrap ESD_bootstrap;
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109 #endif
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110 #ifdef linux
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111 extern AudioBootStrap DMA_bootstrap;
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112 #endif
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113 #ifdef unix
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114 extern AudioBootStrap AUDIO_bootstrap;
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115 #endif
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116 #ifdef ENABLE_WINDIB
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117 extern AudioBootStrap WAVEOUT_bootstrap;
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118 #endif
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119 #ifdef ENABLE_DIRECTX
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120 extern AudioBootStrap DSOUND_bootstrap;
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121 #endif
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122 #ifdef __BEOS__
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123 extern AudioBootStrap BAUDIO_bootstrap;
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124 #endif
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125 #ifdef macintosh
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126 extern AudioBootStrap AUDIO_bootstrap;
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127 #endif
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128 #ifdef _AIX
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129 extern AudioBootStrap Paud_bootstrap;
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130 #endif
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131 #ifdef ENABLE_CYBERGRAPHICS
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132 extern AudioBootStrap AHI_bootstrap;
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133 #endif
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134
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135 /* This is the current audio device */
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136 extern SDL_AudioDevice *current_audio;
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137
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138 #ifndef __SASC
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139 extern struct ExecBase *SysBase;
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140 #endif
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141
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142 #endif /* _SDL_sysaudio_h */
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