Mercurial > sdl-ios-xcode
annotate src/audio/SDL_sysaudio.h @ 4332:67e799ffcadf SDL-1.2
ALSA's idea of a "frame" is the same as SDL's idea of a "sample". The frame is a single sample on a single channel, and we've defined the frames for each channel as being interleaved.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 13 Oct 2009 09:35:37 +0000 |
| parents | 5007e6a66814 |
| children | fe15c4e8efe6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 Sam Lantinga |
| 0 | 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 |
| 0 | 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. |
| 0 | 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 | |
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13 Lesser General Public License for more details. |
| 0 | 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 |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #ifndef _SDL_sysaudio_h | |
| 25 #define _SDL_sysaudio_h | |
| 26 | |
| 27 #include "SDL_mutex.h" | |
| 28 #include "SDL_thread.h" | |
| 29 | |
| 30 /* The SDL audio driver */ | |
| 31 typedef struct SDL_AudioDevice SDL_AudioDevice; | |
| 32 | |
| 33 /* Define the SDL audio driver structure */ | |
| 34 #define _THIS SDL_AudioDevice *_this | |
| 35 #ifndef _STATUS | |
| 36 #define _STATUS SDL_status *status | |
| 37 #endif | |
| 38 struct SDL_AudioDevice { | |
| 39 /* * * */ | |
| 40 /* The name of this audio driver */ | |
| 41 const char *name; | |
| 42 | |
| 43 /* * * */ | |
| 44 /* The description of this audio driver */ | |
| 45 const char *desc; | |
| 46 | |
| 47 /* * * */ | |
| 48 /* Public driver functions */ | |
| 49 int (*OpenAudio)(_THIS, SDL_AudioSpec *spec); | |
| 50 void (*ThreadInit)(_THIS); /* Called by audio thread at start */ | |
| 51 void (*WaitAudio)(_THIS); | |
| 52 void (*PlayAudio)(_THIS); | |
| 53 Uint8 *(*GetAudioBuf)(_THIS); | |
| 54 void (*WaitDone)(_THIS); | |
| 55 void (*CloseAudio)(_THIS); | |
| 56 | |
| 57 /* * * */ | |
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58 /* Lock / Unlock functions added for the Mac port */ |
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59 void (*LockAudio)(_THIS); |
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60 void (*UnlockAudio)(_THIS); |
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61 |
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62 /* * * */ |
| 0 | 63 /* Data common to all devices */ |
| 64 | |
| 65 /* The current audio specification (shared with audio thread) */ | |
| 66 SDL_AudioSpec spec; | |
| 67 | |
| 68 /* An audio conversion block for audio format emulation */ | |
| 69 SDL_AudioCVT convert; | |
| 70 | |
| 71 /* Current state flags */ | |
| 72 int enabled; | |
| 73 int paused; | |
| 74 int opened; | |
| 75 | |
| 76 /* Fake audio buffer for when the audio hardware is busy */ | |
| 77 Uint8 *fake_stream; | |
| 78 | |
| 79 /* A semaphore for locking the mixing buffers */ | |
| 80 SDL_mutex *mixer_lock; | |
| 81 | |
| 82 /* A thread to feed the audio device */ | |
| 83 SDL_Thread *thread; | |
| 84 Uint32 threadid; | |
| 85 | |
| 86 /* * * */ | |
| 87 /* Data private to this driver */ | |
| 88 struct SDL_PrivateAudioData *hidden; | |
| 89 | |
| 90 /* * * */ | |
| 91 /* The function used to dispose of this structure */ | |
| 92 void (*free)(_THIS); | |
| 93 }; | |
| 94 #undef _THIS | |
| 95 | |
| 96 typedef struct AudioBootStrap { | |
| 97 const char *name; | |
| 98 const char *desc; | |
| 99 int (*available)(void); | |
| 100 SDL_AudioDevice *(*create)(int devindex); | |
| 101 } AudioBootStrap; | |
| 102 | |
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103 #if SDL_AUDIO_DRIVER_BSD |
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104 extern AudioBootStrap BSD_AUDIO_bootstrap; |
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105 #endif |
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106 #if SDL_AUDIO_DRIVER_PULSE |
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107 extern AudioBootStrap PULSE_bootstrap; |
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108 #endif |
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109 #if SDL_AUDIO_DRIVER_ALSA |
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110 extern AudioBootStrap ALSA_bootstrap; |
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111 #endif |
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112 #if SDL_AUDIO_DRIVER_OSS |
| 0 | 113 extern AudioBootStrap DSP_bootstrap; |
| 114 extern AudioBootStrap DMA_bootstrap; | |
| 115 #endif | |
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116 #if SDL_AUDIO_DRIVER_QNXNTO |
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117 extern AudioBootStrap QNXNTOAUDIO_bootstrap; |
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118 #endif |
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119 #if SDL_AUDIO_DRIVER_SUNAUDIO |
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120 extern AudioBootStrap SUNAUDIO_bootstrap; |
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121 #endif |
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122 #if SDL_AUDIO_DRIVER_DMEDIA |
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123 extern AudioBootStrap DMEDIA_bootstrap; |
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124 #endif |
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125 #if SDL_AUDIO_DRIVER_ARTS |
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126 extern AudioBootStrap ARTS_bootstrap; |
| 0 | 127 #endif |
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128 #if SDL_AUDIO_DRIVER_ESD |
| 0 | 129 extern AudioBootStrap ESD_bootstrap; |
| 130 #endif | |
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131 #if SDL_AUDIO_DRIVER_NAS |
| 0 | 132 extern AudioBootStrap NAS_bootstrap; |
| 133 #endif | |
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134 #if SDL_AUDIO_DRIVER_DSOUND |
| 0 | 135 extern AudioBootStrap DSOUND_bootstrap; |
| 136 #endif | |
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137 #if SDL_AUDIO_DRIVER_WAVEOUT |
| 0 | 138 extern AudioBootStrap WAVEOUT_bootstrap; |
| 139 #endif | |
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140 #if SDL_AUDIO_DRIVER_PAUD |
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141 extern AudioBootStrap Paud_bootstrap; |
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142 #endif |
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143 #if SDL_AUDIO_DRIVER_BAUDIO |
| 0 | 144 extern AudioBootStrap BAUDIO_bootstrap; |
| 145 #endif | |
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146 #if SDL_AUDIO_DRIVER_COREAUDIO |
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147 extern AudioBootStrap COREAUDIO_bootstrap; |
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148 #endif |
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149 #if SDL_AUDIO_DRIVER_SNDMGR |
| 0 | 150 extern AudioBootStrap SNDMGR_bootstrap; |
| 151 #endif | |
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152 #if SDL_AUDIO_DRIVER_MINT |
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153 extern AudioBootStrap MINTAUDIO_GSXB_bootstrap; |
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154 extern AudioBootStrap MINTAUDIO_MCSN_bootstrap; |
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155 extern AudioBootStrap MINTAUDIO_STFA_bootstrap; |
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156 extern AudioBootStrap MINTAUDIO_XBIOS_bootstrap; |
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157 extern AudioBootStrap MINTAUDIO_DMA8_bootstrap; |
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158 #endif |
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159 #if SDL_AUDIO_DRIVER_DISK |
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160 extern AudioBootStrap DISKAUD_bootstrap; |
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161 #endif |
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162 #if SDL_AUDIO_DRIVER_DUMMY |
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163 extern AudioBootStrap DUMMYAUD_bootstrap; |
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164 #endif |
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165 #if SDL_AUDIO_DRIVER_DC |
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166 extern AudioBootStrap DCAUD_bootstrap; |
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167 #endif |
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168 #if SDL_AUDIO_DRIVER_NDS |
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169 extern AudioBootStrap NDSAUD_bootstrap; |
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170 #endif |
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171 #if SDL_AUDIO_DRIVER_MMEAUDIO |
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172 extern AudioBootStrap MMEAUDIO_bootstrap; |
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173 #endif |
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174 #if SDL_AUDIO_DRIVER_DART |
| 1190 | 175 extern AudioBootStrap DART_bootstrap; |
| 176 #endif | |
| 3975 | 177 #if SDL_AUDIO_DRIVER_EPOCAUDIO |
| 178 extern AudioBootStrap EPOCAudio_bootstrap; | |
| 179 #endif | |
| 0 | 180 |
| 181 /* This is the current audio device */ | |
| 182 extern SDL_AudioDevice *current_audio; | |
| 183 | |
| 184 #endif /* _SDL_sysaudio_h */ |