Mercurial > sdl-ios-xcode
annotate src/audio/SDL_audio.c @ 2765:f55c87ae336b
Final merge of Google Summer of Code 2008 work...
Bring SDL to iPhone and iPod Touch
by Holmes Futrell, mentored by Sam Lantinga
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 04 Oct 2008 06:46:59 +0000 |
parents | 204be4fc2726 |
children | 99210400e8b9 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
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 |
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 /* Allow access to a raw mixing buffer */ | |
25 | |
26 #include "SDL.h" | |
27 #include "SDL_audio_c.h" | |
28 #include "SDL_audiomem.h" | |
29 #include "SDL_sysaudio.h" | |
30 | |
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31 #define _THIS SDL_AudioDevice *this |
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32 |
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33 static SDL_AudioDriver current_audio; |
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34 static SDL_AudioDevice *open_devices[16]; |
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35 |
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36 /* !!! FIXME: These are wordy and unlocalized... */ |
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37 #define DEFAULT_OUTPUT_DEVNAME "System audio output device" |
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38 #define DEFAULT_INPUT_DEVNAME "System audio capture device" |
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39 |
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40 |
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41 /* |
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42 * Not all of these will be compiled and linked in, but it's convenient |
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43 * to have a complete list here and saves yet-another block of #ifdefs... |
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44 * Please see bootstrap[], below, for the actual #ifdef mess. |
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45 */ |
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46 extern AudioBootStrap BSD_AUDIO_bootstrap; |
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47 extern AudioBootStrap DSP_bootstrap; |
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48 extern AudioBootStrap DMA_bootstrap; |
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49 extern AudioBootStrap ALSA_bootstrap; |
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50 extern AudioBootStrap PULSEAUDIO_bootstrap; |
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51 extern AudioBootStrap QNXNTOAUDIO_bootstrap; |
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52 extern AudioBootStrap SUNAUDIO_bootstrap; |
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53 extern AudioBootStrap DMEDIA_bootstrap; |
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54 extern AudioBootStrap ARTS_bootstrap; |
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55 extern AudioBootStrap ESD_bootstrap; |
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56 extern AudioBootStrap NAS_bootstrap; |
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57 extern AudioBootStrap DSOUND_bootstrap; |
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58 extern AudioBootStrap WINWAVEOUT_bootstrap; |
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59 extern AudioBootStrap PAUDIO_bootstrap; |
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60 extern AudioBootStrap BEOSAUDIO_bootstrap; |
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61 extern AudioBootStrap COREAUDIO_bootstrap; |
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62 extern AudioBootStrap COREAUDIOIPHONE_bootstrap; |
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63 extern AudioBootStrap SNDMGR_bootstrap; |
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64 extern AudioBootStrap MINTAUDIO_GSXB_bootstrap; |
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65 extern AudioBootStrap MINTAUDIO_MCSN_bootstrap; |
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66 extern AudioBootStrap MINTAUDIO_STFA_bootstrap; |
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67 extern AudioBootStrap MINTAUDIO_XBIOS_bootstrap; |
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68 extern AudioBootStrap MINTAUDIO_DMA8_bootstrap; |
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69 extern AudioBootStrap DISKAUD_bootstrap; |
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70 extern AudioBootStrap DUMMYAUD_bootstrap; |
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71 extern AudioBootStrap DCAUD_bootstrap; |
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72 extern AudioBootStrap MMEAUDIO_bootstrap; |
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73 extern AudioBootStrap DART_bootstrap; |
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74 extern AudioBootStrap NDSAUD_bootstrap; |
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75 |
1190 | 76 |
0 | 77 /* Available audio drivers */ |
78 static AudioBootStrap *bootstrap[] = { | |
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79 #if SDL_AUDIO_DRIVER_BSD |
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80 &BSD_AUDIO_bootstrap, |
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81 #endif |
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82 #if SDL_AUDIO_DRIVER_OSS |
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83 &DSP_bootstrap, |
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84 &DMA_bootstrap, |
0 | 85 #endif |
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86 #if SDL_AUDIO_DRIVER_ALSA |
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87 &ALSA_bootstrap, |
0 | 88 #endif |
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89 #if SDL_AUDIO_DRIVER_PULSEAUDIO |
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91 #endif |
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92 #if SDL_AUDIO_DRIVER_QNXNTO |
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93 &QNXNTOAUDIO_bootstrap, |
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94 #endif |
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95 #if SDL_AUDIO_DRIVER_SUNAUDIO |
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96 &SUNAUDIO_bootstrap, |
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97 #endif |
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98 #if SDL_AUDIO_DRIVER_DMEDIA |
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99 &DMEDIA_bootstrap, |
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100 #endif |
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101 #if SDL_AUDIO_DRIVER_ARTS |
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102 &ARTS_bootstrap, |
0 | 103 #endif |
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104 #if SDL_AUDIO_DRIVER_ESD |
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105 &ESD_bootstrap, |
0 | 106 #endif |
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107 #if SDL_AUDIO_DRIVER_NAS |
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108 &NAS_bootstrap, |
0 | 109 #endif |
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110 #if SDL_AUDIO_DRIVER_DSOUND |
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111 &DSOUND_bootstrap, |
0 | 112 #endif |
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113 #if SDL_AUDIO_DRIVER_WINWAVEOUT |
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114 &WINWAVEOUT_bootstrap, |
0 | 115 #endif |
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116 #if SDL_AUDIO_DRIVER_PAUDIO |
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117 &PAUDIO_bootstrap, |
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118 #endif |
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119 #if SDL_AUDIO_DRIVER_BEOSAUDIO |
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120 &BEOSAUDIO_bootstrap, |
0 | 121 #endif |
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122 #if SDL_AUDIO_DRIVER_COREAUDIO |
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123 &COREAUDIO_bootstrap, |
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124 #endif |
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125 #if SDL_AUDIO_DRIVER_COREAUDIOIPHONE |
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126 &COREAUDIOIPHONE_bootstrap, |
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127 #endif |
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128 #if SDL_AUDIO_DRIVER_SNDMGR |
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129 &SNDMGR_bootstrap, |
0 | 130 #endif |
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131 #if SDL_AUDIO_DRIVER_MINT |
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132 &MINTAUDIO_GSXB_bootstrap, |
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133 &MINTAUDIO_MCSN_bootstrap, |
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134 &MINTAUDIO_STFA_bootstrap, |
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135 &MINTAUDIO_XBIOS_bootstrap, |
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136 &MINTAUDIO_DMA8_bootstrap, |
398
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137 #endif |
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138 #if SDL_AUDIO_DRIVER_DISK |
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139 &DISKAUD_bootstrap, |
68
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140 #endif |
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141 #if SDL_AUDIO_DRIVER_DUMMY |
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142 &DUMMYAUD_bootstrap, |
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143 #endif |
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144 #if SDL_AUDIO_DRIVER_DC |
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145 &DCAUD_bootstrap, |
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146 #endif |
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147 #if SDL_AUDIO_DRIVER_MMEAUDIO |
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148 &MMEAUDIO_bootstrap, |
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149 #endif |
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150 #if SDL_AUDIO_DRIVER_DART |
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151 &DART_bootstrap, |
1190 | 152 #endif |
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153 #if SDL_AUDIO_DRIVER_NDS |
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154 &NDSAUD_bootstrap, |
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155 #endif |
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156 NULL |
0 | 157 }; |
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158 |
2060 | 159 static SDL_AudioDevice * |
160 get_audio_device(SDL_AudioDeviceID id) | |
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161 { |
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162 id--; |
2060 | 163 if ((id >= SDL_arraysize(open_devices)) || (open_devices[id] == NULL)) { |
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164 SDL_SetError("Invalid audio device ID"); |
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165 return NULL; |
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166 } |
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167 |
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168 return open_devices[id]; |
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169 } |
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170 |
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171 |
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172 /* stubs for audio drivers that don't need a specific entry point... */ |
2060 | 173 static int |
174 SDL_AudioDetectDevices_Default(int iscapture) | |
175 { | |
176 return -1; | |
177 } | |
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178 |
2060 | 179 static void |
180 SDL_AudioThreadInit_Default(_THIS) | |
181 { /* no-op. */ | |
182 } | |
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183 |
2060 | 184 static void |
185 SDL_AudioWaitDevice_Default(_THIS) | |
186 { /* no-op. */ | |
187 } | |
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188 |
2060 | 189 static void |
190 SDL_AudioPlayDevice_Default(_THIS) | |
191 { /* no-op. */ | |
192 } | |
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193 |
2060 | 194 static Uint8 * |
195 SDL_AudioGetDeviceBuf_Default(_THIS) | |
196 { | |
197 return NULL; | |
198 } | |
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199 |
2060 | 200 static void |
201 SDL_AudioWaitDone_Default(_THIS) | |
202 { /* no-op. */ | |
203 } | |
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204 |
2060 | 205 static void |
206 SDL_AudioCloseDevice_Default(_THIS) | |
207 { /* no-op. */ | |
208 } | |
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209 |
2060 | 210 static void |
211 SDL_AudioDeinitialize_Default(void) | |
212 { /* no-op. */ | |
213 } | |
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214 |
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215 static int |
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216 SDL_AudioOpenDevice_Default(_THIS, const char *devname, int iscapture) |
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217 { |
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218 return 0; |
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219 } |
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220 |
2060 | 221 static const char * |
222 SDL_AudioGetDeviceName_Default(int index, int iscapture) | |
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223 { |
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224 SDL_SetError("No such device"); |
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225 return NULL; |
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226 } |
0 | 227 |
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228 static void |
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229 SDL_AudioLockDevice_Default(SDL_AudioDevice * device) |
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230 { |
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231 if (device->thread && (SDL_ThreadID() == device->threadid)) { |
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232 return; |
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233 } |
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234 SDL_mutexP(device->mixer_lock); |
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235 } |
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236 |
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237 static void |
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238 SDL_AudioUnlockDevice_Default(SDL_AudioDevice * device) |
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239 { |
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240 if (device->thread && (SDL_ThreadID() == device->threadid)) { |
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241 return; |
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242 } |
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243 SDL_mutexV(device->mixer_lock); |
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244 } |
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245 |
0 | 246 |
2060 | 247 static void |
248 finalize_audio_entry_points(void) | |
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249 { |
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250 /* |
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251 * Fill in stub functions for unused driver entry points. This lets us |
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252 * blindly call them without having to check for validity first. |
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253 */ |
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254 |
2060 | 255 #define FILL_STUB(x) \ |
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256 if (current_audio.impl.x == NULL) { \ |
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257 current_audio.impl.x = SDL_Audio##x##_Default; \ |
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258 } |
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259 FILL_STUB(DetectDevices); |
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260 FILL_STUB(GetDeviceName); |
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261 FILL_STUB(OpenDevice); |
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262 FILL_STUB(ThreadInit); |
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263 FILL_STUB(WaitDevice); |
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264 FILL_STUB(PlayDevice); |
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265 FILL_STUB(GetDeviceBuf); |
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266 FILL_STUB(WaitDone); |
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267 FILL_STUB(CloseDevice); |
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268 FILL_STUB(LockDevice); |
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269 FILL_STUB(UnlockDevice); |
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270 FILL_STUB(Deinitialize); |
2060 | 271 #undef FILL_STUB |
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272 } |
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273 |
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274 /* Streaming functions (for when the input and output buffer sizes are different) */ |
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275 /* Write [length] bytes from buf into the streamer */ |
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276 void |
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277 SDL_StreamWrite(SDL_AudioStreamer * stream, Uint8 * buf, int length) |
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278 { |
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279 int i; |
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280 |
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281 for (i = 0; i < length; ++i) { |
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282 stream->buffer[stream->write_pos] = buf[i]; |
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283 ++stream->write_pos; |
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284 } |
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285 } |
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286 |
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287 /* Read [length] bytes out of the streamer into buf */ |
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288 void |
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289 SDL_StreamRead(SDL_AudioStreamer * stream, Uint8 * buf, int length) |
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290 { |
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291 int i; |
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292 |
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293 for (i = 0; i < length; ++i) { |
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294 buf[i] = stream->buffer[stream->read_pos]; |
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295 ++stream->read_pos; |
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296 } |
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297 } |
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298 |
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299 int |
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300 SDL_StreamLength(SDL_AudioStreamer * stream) |
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301 { |
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302 return (stream->write_pos - stream->read_pos) % stream->max_len; |
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303 } |
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304 |
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305 /* Initialize the stream by allocating the buffer and setting the read/write heads to the beginning */ |
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306 int |
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307 SDL_StreamInit(SDL_AudioStreamer * stream, int max_len, Uint8 silence) |
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308 { |
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309 /* First try to allocate the buffer */ |
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310 stream->buffer = (Uint8 *) SDL_malloc(max_len); |
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311 if (stream->buffer == NULL) { |
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312 return -1; |
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313 } |
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314 |
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315 stream->max_len = max_len; |
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316 stream->read_pos = 0; |
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317 stream->write_pos = 0; |
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318 |
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319 /* Zero out the buffer */ |
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320 SDL_memset(stream->buffer, silence, max_len); |
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321 |
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322 return 0; |
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323 } |
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324 |
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325 /* Deinitialize the stream simply by freeing the buffer */ |
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326 void |
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327 SDL_StreamDeinit(SDL_AudioStreamer * stream) |
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328 { |
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329 if (stream->buffer != NULL) { |
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330 SDL_free(stream->buffer); |
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331 } |
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332 } |
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333 |
0 | 334 |
335 /* The general mixing thread function */ | |
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336 int SDLCALL |
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337 SDL_RunAudio(void *devicep) |
0 | 338 { |
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339 SDL_AudioDevice *device = (SDL_AudioDevice *) devicep; |
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340 Uint8 *stream; |
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341 int stream_len; |
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342 void *udata; |
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343 void (SDLCALL * fill) (void *userdata, Uint8 * stream, int len); |
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344 int silence; |
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345 int stream_max_len; |
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346 |
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347 /* For streaming when the buffer sizes don't match up */ |
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348 Uint8 *istream; |
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349 int istream_len; |
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351 /* Perform any thread setup */ |
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352 device->threadid = SDL_ThreadID(); |
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353 current_audio.impl.ThreadInit(device); |
0 | 354 |
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355 /* Set up the mixing function */ |
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356 fill = device->spec.callback; |
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357 udata = device->spec.userdata; |
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358 |
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359 /* By default do not stream */ |
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360 device->use_streamer = 0; |
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361 |
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362 if (device->convert.needed) { |
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363 if (device->convert.src_format == AUDIO_U8) { |
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364 silence = 0x80; |
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365 } else { |
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366 silence = 0; |
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367 } |
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368 |
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369 /* If the result of the conversion alters the length, i.e. resampling is being used, use the streamer */ |
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370 if (device->convert.len_mult != 1 || device->convert.len_div != 1) { |
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371 /* The streamer's maximum length should be twice whichever is larger: spec.size or len_cvt */ |
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372 stream_max_len = 2 * device->spec.size; |
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373 if (device->convert.len_mult > device->convert.len_div) { |
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374 stream_max_len *= device->convert.len_mult; |
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375 stream_max_len /= device->convert.len_div; |
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376 } |
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377 if (SDL_StreamInit(&device->streamer, stream_max_len, silence) < |
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378 0) |
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379 return -1; |
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380 device->use_streamer = 1; |
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381 |
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382 /* istream_len should be the length of what we grab from the callback and feed to conversion, |
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383 so that we get close to spec_size. I.e. we want device.spec_size = istream_len * u / d |
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384 */ |
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385 istream_len = |
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386 device->spec.size * device->convert.len_div / |
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387 device->convert.len_mult; |
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388 } |
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389 |
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390 /* stream_len = device->convert.len; */ |
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391 stream_len = device->spec.size; |
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392 } else { |
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393 silence = device->spec.silence; |
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394 stream_len = device->spec.size; |
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395 } |
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396 |
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397 /* Determine if the streamer is necessary here */ |
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398 if (device->use_streamer == 1) { |
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399 /* This code is almost the same as the old code. The difference is, instead of reding |
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400 directly from the callback into "stream", then converting and sending the audio off, |
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401 we go: callback -> "istream" -> (conversion) -> streamer -> stream -> device. |
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402 However, reading and writing with streamer are done separately: |
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403 - We only call the callback and write to the streamer when the streamer does not |
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404 contain enough samples to output to the device. |
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405 - We only read from the streamer and tell the device to play when the streamer |
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406 does have enough samples to output. |
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407 This allows us to perform resampling in the conversion step, where the output of the |
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408 resampling process can be any number. We will have to see what a good size for the |
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409 stream's maximum length is, but I suspect 2*max(len_cvt, stream_len) is a good figure. |
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410 */ |
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411 while (device->enabled) { |
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412 /* Only read in audio if the streamer doesn't have enough already (if it does not have enough samples to output) */ |
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413 if (SDL_StreamLength(&device->streamer) < stream_len) { |
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414 /* Set up istream */ |
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415 if (device->convert.needed) { |
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416 if (device->convert.buf) { |
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417 istream = device->convert.buf; |
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418 } else { |
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419 continue; |
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420 } |
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421 } else { |
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422 istream = current_audio.impl.GetDeviceBuf(device); |
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423 if (istream == NULL) { |
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424 istream = device->fake_stream; |
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425 } |
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426 } |
0 | 427 |
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428 /* Read from the callback into the _input_ stream */ |
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429 if (!device->paused) { |
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430 SDL_mutexP(device->mixer_lock); |
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431 (*fill) (udata, istream, istream_len); |
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432 SDL_mutexV(device->mixer_lock); |
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433 } |
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434 |
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435 /* Convert the audio if necessary and write to the streamer */ |
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436 if (device->convert.needed) { |
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437 SDL_ConvertAudio(&device->convert); |
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438 if (istream == NULL) { |
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439 istream = device->fake_stream; |
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440 } |
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441 /*SDL_memcpy(istream, device->convert.buf, device->convert.len_cvt); */ |
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442 SDL_StreamWrite(&device->streamer, device->convert.buf, |
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443 device->convert.len_cvt); |
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444 } else { |
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445 SDL_StreamWrite(&device->streamer, istream, istream_len); |
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446 } |
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447 } |
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448 |
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449 /* Only output audio if the streamer has enough to output */ |
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450 if (SDL_StreamLength(&device->streamer) >= stream_len) { |
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451 /* Set up the output stream */ |
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452 if (device->convert.needed) { |
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453 if (device->convert.buf) { |
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454 stream = device->convert.buf; |
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455 } else { |
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456 continue; |
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457 } |
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458 } else { |
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459 stream = current_audio.impl.GetDeviceBuf(device); |
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460 if (stream == NULL) { |
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461 stream = device->fake_stream; |
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462 } |
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463 } |
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464 |
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465 /* Now read from the streamer */ |
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466 SDL_StreamRead(&device->streamer, stream, stream_len); |
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467 |
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468 /* Ready current buffer for play and change current buffer */ |
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469 if (stream != device->fake_stream) { |
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470 current_audio.impl.PlayDevice(device); |
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471 } |
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472 |
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473 /* Wait for an audio buffer to become available */ |
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474 if (stream == device->fake_stream) { |
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475 SDL_Delay((device->spec.samples * 1000) / |
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476 device->spec.freq); |
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477 } else { |
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478 current_audio.impl.WaitDevice(device); |
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479 } |
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480 } |
0 | 481 |
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482 } |
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483 } else { |
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484 /* Otherwise, do not use the streamer. This is the old code. */ |
0 | 485 |
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486 /* Loop, filling the audio buffers */ |
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487 while (device->enabled) { |
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488 |
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489 /* Fill the current buffer with sound */ |
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490 if (device->convert.needed) { |
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491 if (device->convert.buf) { |
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492 stream = device->convert.buf; |
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493 } else { |
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494 continue; |
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495 } |
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496 } else { |
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497 stream = current_audio.impl.GetDeviceBuf(device); |
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498 if (stream == NULL) { |
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499 stream = device->fake_stream; |
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500 } |
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501 } |
0 | 502 |
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503 if (!device->paused) { |
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504 SDL_mutexP(device->mixer_lock); |
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505 (*fill) (udata, stream, stream_len); |
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506 SDL_mutexV(device->mixer_lock); |
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507 } |
1562 | 508 |
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509 /* Convert the audio if necessary */ |
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510 if (device->convert.needed) { |
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511 SDL_ConvertAudio(&device->convert); |
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512 stream = current_audio.impl.GetDeviceBuf(device); |
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513 if (stream == NULL) { |
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514 stream = device->fake_stream; |
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515 } |
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516 SDL_memcpy(stream, device->convert.buf, |
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517 device->convert.len_cvt); |
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518 } |
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519 |
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520 /* Ready current buffer for play and change current buffer */ |
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521 if (stream != device->fake_stream) { |
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522 current_audio.impl.PlayDevice(device); |
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523 } |
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524 |
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525 /* Wait for an audio buffer to become available */ |
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526 if (stream == device->fake_stream) { |
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527 SDL_Delay((device->spec.samples * 1000) / device->spec.freq); |
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528 } else { |
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529 current_audio.impl.WaitDevice(device); |
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530 } |
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531 } |
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532 } |
1562 | 533 |
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534 /* Wait for the audio to drain.. */ |
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|
535 current_audio.impl.WaitDone(device); |
21
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536 |
2716
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537 /* If necessary, deinit the streamer */ |
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538 if (device->use_streamer == 1) |
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539 SDL_StreamDeinit(&device->streamer); |
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540 |
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541 return (0); |
0 | 542 } |
543 | |
322
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544 |
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545 static SDL_AudioFormat |
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546 SDL_ParseAudioFormat(const char *string) |
1794 | 547 { |
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548 #define CHECK_FMT_STRING(x) if (SDL_strcmp(string, #x) == 0) return AUDIO_##x |
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549 CHECK_FMT_STRING(U8); |
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550 CHECK_FMT_STRING(S8); |
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551 CHECK_FMT_STRING(U16LSB); |
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552 CHECK_FMT_STRING(S16LSB); |
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553 CHECK_FMT_STRING(U16MSB); |
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554 CHECK_FMT_STRING(S16MSB); |
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555 CHECK_FMT_STRING(U16SYS); |
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556 CHECK_FMT_STRING(S16SYS); |
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557 CHECK_FMT_STRING(U16); |
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558 CHECK_FMT_STRING(S16); |
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559 CHECK_FMT_STRING(S32LSB); |
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560 CHECK_FMT_STRING(S32MSB); |
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561 CHECK_FMT_STRING(S32SYS); |
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562 CHECK_FMT_STRING(S32); |
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563 CHECK_FMT_STRING(F32LSB); |
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564 CHECK_FMT_STRING(F32MSB); |
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565 CHECK_FMT_STRING(F32SYS); |
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|
566 CHECK_FMT_STRING(F32); |
2060 | 567 #undef CHECK_FMT_STRING |
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|
568 return 0; |
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569 } |
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570 |
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571 int |
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572 SDL_GetNumAudioDrivers(void) |
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573 { |
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574 return (SDL_arraysize(bootstrap) - 1); |
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575 } |
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576 |
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577 const char * |
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|
578 SDL_GetAudioDriver(int index) |
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579 { |
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580 if (index >= 0 && index < SDL_GetNumAudioDrivers()) { |
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581 return (bootstrap[index]->name); |
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582 } |
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583 return (NULL); |
1794 | 584 } |
585 | |
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586 int |
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587 SDL_AudioInit(const char *driver_name) |
0 | 588 { |
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589 int i = 0; |
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590 int initialized = 0; |
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591 int tried_to_init = 0; |
0 | 592 |
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593 if (SDL_WasInit(SDL_INIT_AUDIO)) { |
2060 | 594 SDL_AudioQuit(); /* shutdown driver if already running. */ |
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595 } |
0 | 596 |
2060 | 597 SDL_memset(¤t_audio, '\0', sizeof(current_audio)); |
598 SDL_memset(open_devices, '\0', sizeof(open_devices)); | |
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599 |
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600 /* Select the proper audio driver */ |
1909
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Look at environment variables in SDL_VideoInit() and SDL_AudioInit()
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601 if (driver_name == NULL) { |
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Look at environment variables in SDL_VideoInit() and SDL_AudioInit()
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602 driver_name = SDL_getenv("SDL_AUDIODRIVER"); |
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603 } |
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604 |
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605 for (i = 0; (!initialized) && (bootstrap[i]); ++i) { |
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606 /* make sure we should even try this driver before doing so... */ |
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607 const AudioBootStrap *backend = bootstrap[i]; |
2060 | 608 if (((driver_name) && (SDL_strcasecmp(backend->name, driver_name))) || |
609 ((!driver_name) && (backend->demand_only))) { | |
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610 continue; |
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611 } |
0 | 612 |
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613 tried_to_init = 1; |
2060 | 614 SDL_memset(¤t_audio, 0, sizeof(current_audio)); |
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615 current_audio.name = backend->name; |
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616 current_audio.desc = backend->desc; |
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617 initialized = backend->init(¤t_audio.impl); |
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618 } |
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619 |
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620 if (!initialized) { |
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621 /* specific drivers will set the error message if they fail... */ |
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622 if (!tried_to_init) { |
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623 if (driver_name) { |
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624 SDL_SetError("%s not available", driver_name); |
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625 } else { |
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626 SDL_SetError("No available audio device"); |
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627 } |
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|
628 } |
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629 |
2060 | 630 SDL_memset(¤t_audio, 0, sizeof(current_audio)); |
631 return (-1); /* No driver was available, so fail. */ | |
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632 } |
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633 |
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634 finalize_audio_entry_points(); |
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635 |
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636 return (0); |
0 | 637 } |
638 | |
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639 /* |
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|
640 * Get the current audio driver name |
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641 */ |
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642 const char * |
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643 SDL_GetCurrentAudioDriver() |
0 | 644 { |
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645 return current_audio.name; |
0 | 646 } |
647 | |
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648 |
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649 int |
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650 SDL_GetNumAudioDevices(int iscapture) |
0 | 651 { |
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652 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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653 return -1; |
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654 } |
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655 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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656 return 0; |
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657 } |
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658 |
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659 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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660 return 1; |
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661 } |
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662 |
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663 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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664 return 1; |
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665 } |
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666 |
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667 return current_audio.impl.DetectDevices(iscapture); |
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668 } |
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669 |
0 | 670 |
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671 const char * |
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672 SDL_GetAudioDeviceName(int index, int iscapture) |
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673 { |
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674 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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675 SDL_SetError("Audio subsystem is not initialized"); |
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676 return NULL; |
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677 } |
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678 |
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679 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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680 SDL_SetError("No capture support"); |
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681 return NULL; |
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682 } |
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683 |
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684 if (index < 0) { |
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685 SDL_SetError("No such device"); |
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686 return NULL; |
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687 } |
0 | 688 |
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689 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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690 return DEFAULT_INPUT_DEVNAME; |
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691 } |
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692 |
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693 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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694 return DEFAULT_OUTPUT_DEVNAME; |
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695 } |
262
ba5363e21df8
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696 |
2049
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697 return current_audio.impl.GetDeviceName(index, iscapture); |
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698 } |
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699 |
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700 |
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701 static void |
2060 | 702 close_audio_device(SDL_AudioDevice * device) |
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703 { |
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704 device->enabled = 0; |
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705 if (device->thread != NULL) { |
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706 SDL_WaitThread(device->thread, NULL); |
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707 } |
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708 if (device->mixer_lock != NULL) { |
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709 SDL_DestroyMutex(device->mixer_lock); |
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710 } |
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|
711 if (device->fake_stream != NULL) { |
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712 SDL_FreeAudioMem(device->fake_stream); |
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713 } |
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|
714 if (device->convert.needed) { |
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|
715 SDL_FreeAudioMem(device->convert.buf); |
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|
716 } |
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717 if (device->opened) { |
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718 current_audio.impl.CloseDevice(device); |
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|
719 device->opened = 0; |
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|
720 } |
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|
721 SDL_FreeAudioMem(device); |
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722 } |
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|
723 |
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|
724 |
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|
725 /* |
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|
726 * Sanity check desired AudioSpec for SDL_OpenAudio() in (orig). |
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|
727 * Fills in a sanitized copy in (prepared). |
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728 * Returns non-zero if okay, zero on fatal parameters in (orig). |
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|
729 */ |
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|
730 static int |
2060 | 731 prepare_audiospec(const SDL_AudioSpec * orig, SDL_AudioSpec * prepared) |
2049
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|
732 { |
2060 | 733 SDL_memcpy(prepared, orig, sizeof(SDL_AudioSpec)); |
2049
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734 |
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|
735 if (orig->callback == NULL) { |
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|
736 SDL_SetError("SDL_OpenAudio() passed a NULL callback"); |
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|
737 return 0; |
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738 } |
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739 |
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740 if (orig->freq == 0) { |
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|
741 const char *env = SDL_getenv("SDL_AUDIO_FREQUENCY"); |
2060 | 742 if ((!env) || ((prepared->freq = SDL_atoi(env)) == 0)) { |
743 prepared->freq = 22050; /* a reasonable default */ | |
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744 } |
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745 } |
2049
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746 |
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747 if (orig->format == 0) { |
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748 const char *env = SDL_getenv("SDL_AUDIO_FORMAT"); |
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749 if ((!env) || ((prepared->format = SDL_ParseAudioFormat(env)) == 0)) { |
2060 | 750 prepared->format = AUDIO_S16; /* a reasonable default */ |
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751 } |
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752 } |
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753 |
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754 switch (orig->channels) { |
2060 | 755 case 0:{ |
756 const char *env = SDL_getenv("SDL_AUDIO_CHANNELS"); | |
2141 | 757 if ((!env) || ((prepared->channels = (Uint8) SDL_atoi(env)) == 0)) { |
2060 | 758 prepared->channels = 2; /* a reasonable default */ |
759 } | |
760 break; | |
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761 } |
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762 case 1: /* Mono */ |
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|
763 case 2: /* Stereo */ |
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|
764 case 4: /* surround */ |
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765 case 6: /* surround with center and lfe */ |
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766 break; |
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|
767 default: |
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768 SDL_SetError("Unsupported number of audio channels."); |
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769 return 0; |
1895
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770 } |
2049
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|
771 |
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772 if (orig->samples == 0) { |
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773 const char *env = SDL_getenv("SDL_AUDIO_SAMPLES"); |
2060 | 774 if ((!env) || ((prepared->samples = (Uint16) SDL_atoi(env)) == 0)) { |
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775 /* Pick a default of ~46 ms at desired frequency */ |
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776 /* !!! FIXME: remove this when the non-Po2 resampling is in. */ |
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777 const int samples = (prepared->freq / 1000) * 46; |
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778 int power2 = 1; |
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|
779 while (power2 < samples) { |
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780 power2 *= 2; |
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|
781 } |
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782 prepared->samples = power2; |
1895
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783 } |
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784 } |
0 | 785 |
1895
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|
786 /* Calculate the silence and size of the audio specification */ |
2049
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787 SDL_CalculateAudioSpec(prepared); |
21
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|
788 |
2049
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789 return 1; |
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790 } |
1408
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791 |
21
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792 |
2049
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|
793 static SDL_AudioDeviceID |
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794 open_audio_device(const char *devname, int iscapture, |
2060 | 795 const SDL_AudioSpec * _desired, SDL_AudioSpec * obtained, |
796 int min_id) | |
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797 { |
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798 SDL_AudioDeviceID id = 0; |
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|
799 SDL_AudioSpec desired; |
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800 SDL_AudioDevice *device; |
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801 int i = 0; |
21
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|
802 |
2049
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803 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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804 SDL_SetError("Audio subsystem is not initialized"); |
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|
805 return 0; |
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|
806 } |
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|
807 |
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|
808 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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|
809 SDL_SetError("No capture support"); |
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|
810 return 0; |
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|
811 } |
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|
812 |
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|
813 if (!prepare_audiospec(_desired, &desired)) { |
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|
814 return 0; |
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|
815 } |
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|
816 |
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|
817 /* If app doesn't care about a specific device, let the user override. */ |
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818 if (devname == NULL) { |
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|
819 devname = SDL_getenv("SDL_AUDIO_DEVICE_NAME"); |
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|
820 } |
21
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|
821 |
2049
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|
822 /* |
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823 * Catch device names at the high level for the simple case... |
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824 * This lets us have a basic "device enumeration" for systems that |
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|
825 * don't have multiple devices, but makes sure the device name is |
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|
826 * always NULL when it hits the low level. |
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|
827 * |
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|
828 * Also make sure that the simple case prevents multiple simultaneous |
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|
829 * opens of the default system device. |
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|
830 */ |
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|
831 |
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|
832 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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|
833 if ((devname) && (SDL_strcmp(devname, DEFAULT_INPUT_DEVNAME) != 0)) { |
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|
834 SDL_SetError("No such device"); |
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|
835 return 0; |
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|
836 } |
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|
837 devname = NULL; |
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|
838 |
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|
839 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
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840 if ((open_devices[i]) && (open_devices[i]->iscapture)) { |
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|
841 SDL_SetError("Audio device already open"); |
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|
842 return 0; |
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|
843 } |
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|
844 } |
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|
845 } |
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|
846 |
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847 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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848 if ((devname) && (SDL_strcmp(devname, DEFAULT_OUTPUT_DEVNAME) != 0)) { |
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|
849 SDL_SetError("No such device"); |
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|
850 return 0; |
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851 } |
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852 devname = NULL; |
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|
853 |
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|
854 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
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855 if ((open_devices[i]) && (!open_devices[i]->iscapture)) { |
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|
856 SDL_SetError("Audio device already open"); |
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857 return 0; |
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858 } |
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|
859 } |
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860 } |
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861 |
2060 | 862 device = (SDL_AudioDevice *) SDL_AllocAudioMem(sizeof(SDL_AudioDevice)); |
2049
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863 if (device == NULL) { |
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864 SDL_OutOfMemory(); |
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|
865 return 0; |
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866 } |
2060 | 867 SDL_memset(device, '\0', sizeof(SDL_AudioDevice)); |
868 SDL_memcpy(&device->spec, &desired, sizeof(SDL_AudioSpec)); | |
2049
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869 device->enabled = 1; |
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|
870 device->paused = 1; |
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|
871 device->iscapture = iscapture; |
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872 |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
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2045
diff
changeset
|
873 /* Create a semaphore for locking the sound buffers */ |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
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diff
changeset
|
874 if (!current_audio.impl.SkipMixerLock) { |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
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2045
diff
changeset
|
875 device->mixer_lock = SDL_CreateMutex(); |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
876 if (device->mixer_lock == NULL) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
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diff
changeset
|
877 close_audio_device(device); |
5f6550e5184f
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parents:
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diff
changeset
|
878 SDL_SetError("Couldn't create mixer lock"); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
879 return 0; |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
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|
880 } |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
881 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
882 |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
883 if (!current_audio.impl.OpenDevice(device, devname, iscapture)) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
2045
diff
changeset
|
884 close_audio_device(device); |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
885 return 0; |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
886 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff
changeset
|
887 device->opened = 1; |
0 | 888 |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
889 /* If the audio driver changes the buffer size, accept it */ |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
890 if (device->spec.samples != desired.samples) { |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
891 desired.samples = device->spec.samples; |
5f6550e5184f
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parents:
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|
892 SDL_CalculateAudioSpec(&device->spec); |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
893 } |
0 | 894 |
1895
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parents:
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diff
changeset
|
895 /* Allocate a fake audio memory buffer */ |
2049
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
896 device->fake_stream = SDL_AllocAudioMem(device->spec.size); |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
897 if (device->fake_stream == NULL) { |
5f6550e5184f
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|
898 close_audio_device(device); |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
1794
diff
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|
899 SDL_OutOfMemory(); |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
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|
900 return 0; |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
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|
901 } |
0 | 902 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
903 /* See if we need to do any conversion */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
904 if (obtained != NULL) { |
2049
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
905 SDL_memcpy(obtained, &device->spec, sizeof(SDL_AudioSpec)); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
906 } else if (desired.freq != device->spec.freq || |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
907 desired.format != device->spec.format || |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
908 desired.channels != device->spec.channels) { |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
909 /* Build an audio conversion block */ |
2049
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
910 if (SDL_BuildAudioCVT(&device->convert, |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
911 desired.format, desired.channels, |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
912 desired.freq, |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
913 device->spec.format, device->spec.channels, |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
914 device->spec.freq) < 0) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
915 close_audio_device(device); |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
916 return 0; |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
917 } |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
918 if (device->convert.needed) { |
2060 | 919 device->convert.len = (int) (((double) desired.size) / |
920 device->convert.len_ratio); | |
2053
716cf90f24a0
1.3 branch version of revision 2878.
Ryan C. Gordon <icculus@icculus.org>
parents:
2049
diff
changeset
|
921 |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
922 device->convert.buf = |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
923 (Uint8 *) SDL_AllocAudioMem(device->convert.len * |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
924 device->convert.len_mult); |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
925 if (device->convert.buf == NULL) { |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
926 close_audio_device(device); |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
927 SDL_OutOfMemory(); |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
928 return 0; |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
929 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
930 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
931 } |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
932 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
933 /* Find an available device ID and store the structure... */ |
2060 | 934 for (id = min_id - 1; id < SDL_arraysize(open_devices); id++) { |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
935 if (open_devices[id] == NULL) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
936 open_devices[id] = device; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
937 break; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
938 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
939 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
940 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
941 if (id == SDL_arraysize(open_devices)) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
942 SDL_SetError("Too many open audio devices"); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
943 close_audio_device(device); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
944 return 0; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
945 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
946 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
947 /* Start the audio thread if necessary */ |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
948 if (!current_audio.impl.ProvidesOwnCallbackThread) { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
949 /* Start the audio thread */ |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
950 /* !!! FIXME: this is nasty. */ |
1402
d910939febfa
Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents:
1379
diff
changeset
|
951 #if (defined(__WIN32__) && !defined(_WIN32_WCE)) && !defined(HAVE_LIBC) |
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
952 #undef SDL_CreateThread |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
953 device->thread = SDL_CreateThread(SDL_RunAudio, device, NULL, NULL); |
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
954 #else |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
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diff
changeset
|
955 device->thread = SDL_CreateThread(SDL_RunAudio, device); |
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
956 #endif |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
2045
diff
changeset
|
957 if (device->thread == NULL) { |
2060 | 958 SDL_CloseAudioDevice(id + 1); |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
959 SDL_SetError("Couldn't create audio thread"); |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
960 return 0; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
961 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
962 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
963 |
2060 | 964 return id + 1; |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
965 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
966 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
967 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
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diff
changeset
|
968 int |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
969 SDL_OpenAudio(const SDL_AudioSpec * desired, SDL_AudioSpec * obtained) |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
2045
diff
changeset
|
970 { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
971 SDL_AudioDeviceID id = 0; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
972 |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
973 /* Start up the audio driver, if necessary. This is legacy behaviour! */ |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
2045
diff
changeset
|
974 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
975 if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) { |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
976 return (-1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
977 } |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
978 } |
0 | 979 |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
980 /* SDL_OpenAudio() is legacy and can only act on Device ID #1. */ |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
981 if (open_devices[0] != NULL) { |
5f6550e5184f
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|
982 SDL_SetError("Audio device is already opened"); |
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983 return (-1); |
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984 } |
2049
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985 |
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|
986 id = open_audio_device(NULL, 0, desired, obtained, 1); |
2060 | 987 if (id > 1) { /* this should never happen in theory... */ |
2049
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|
988 SDL_CloseAudioDevice(id); |
2060 | 989 SDL_SetError("Internal error"); /* MUST be Device ID #1! */ |
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|
990 return (-1); |
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|
991 } |
21
75a95f82bc1f
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|
992 |
2049
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993 return ((id == 0) ? -1 : 0); |
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994 } |
21
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|
995 |
2049
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|
996 SDL_AudioDeviceID |
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997 SDL_OpenAudioDevice(const char *device, int iscapture, |
2060 | 998 const SDL_AudioSpec * desired, SDL_AudioSpec * obtained) |
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999 { |
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1000 return open_audio_device(device, iscapture, desired, obtained, 2); |
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1001 } |
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1002 |
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1003 SDL_audiostatus |
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1004 SDL_GetAudioDeviceStatus(SDL_AudioDeviceID devid) |
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1005 { |
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1006 SDL_AudioDevice *device = get_audio_device(devid); |
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1007 SDL_audiostatus status = SDL_AUDIO_STOPPED; |
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1008 if (device && device->enabled) { |
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1009 if (device->paused) { |
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1010 status = SDL_AUDIO_PAUSED; |
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1011 } else { |
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1012 status = SDL_AUDIO_PLAYING; |
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1013 } |
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1014 } |
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1015 return (status); |
0 | 1016 } |
1017 | |
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1018 |
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1019 SDL_audiostatus |
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1020 SDL_GetAudioStatus(void) |
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1021 { |
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1022 return SDL_GetAudioDeviceStatus(1); |
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1023 } |
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1024 |
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1025 void |
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|
1026 SDL_PauseAudioDevice(SDL_AudioDeviceID devid, int pause_on) |
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1027 { |
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1028 SDL_AudioDevice *device = get_audio_device(devid); |
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1029 if (device) { |
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1030 device->paused = pause_on; |
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1031 } |
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1032 } |
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1033 |
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1034 void |
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1035 SDL_PauseAudio(int pause_on) |
0 | 1036 { |
2049
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1037 SDL_PauseAudioDevice(1, pause_on); |
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1038 } |
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1039 |
0 | 1040 |
2049
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1041 void |
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1042 SDL_LockAudioDevice(SDL_AudioDeviceID devid) |
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1043 { |
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1044 /* Obtain a lock on the mixing buffers */ |
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1045 SDL_AudioDevice *device = get_audio_device(devid); |
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1046 if (device) { |
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1047 current_audio.impl.LockDevice(device); |
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1048 } |
0 | 1049 } |
1050 | |
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1051 void |
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1052 SDL_LockAudio(void) |
0 | 1053 { |
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1054 SDL_LockAudioDevice(1); |
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1055 } |
0 | 1056 |
2049
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|
1057 void |
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1058 SDL_UnlockAudioDevice(SDL_AudioDeviceID devid) |
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1059 { |
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1060 /* Obtain a lock on the mixing buffers */ |
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1061 SDL_AudioDevice *device = get_audio_device(devid); |
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1062 if (device) { |
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1063 current_audio.impl.UnlockDevice(device); |
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1064 } |
0 | 1065 } |
1066 | |
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1067 void |
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1068 SDL_UnlockAudio(void) |
0 | 1069 { |
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1070 SDL_UnlockAudioDevice(1); |
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|
1071 } |
0 | 1072 |
2049
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1073 void |
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1074 SDL_CloseAudioDevice(SDL_AudioDeviceID devid) |
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1075 { |
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1076 SDL_AudioDevice *device = get_audio_device(devid); |
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1077 if (device) { |
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1078 close_audio_device(device); |
2060 | 1079 open_devices[devid - 1] = NULL; |
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1080 } |
0 | 1081 } |
1082 | |
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1083 void |
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|
1084 SDL_CloseAudio(void) |
0 | 1085 { |
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1086 SDL_CloseAudioDevice(1); |
0 | 1087 } |
1088 | |
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1089 void |
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1090 SDL_AudioQuit(void) |
0 | 1091 { |
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1092 SDL_AudioDeviceID i; |
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1093 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
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1094 SDL_CloseAudioDevice(i); |
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1095 } |
0 | 1096 |
2049
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1097 /* Free the driver data */ |
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1098 current_audio.impl.Deinitialize(); |
2060 | 1099 SDL_memset(¤t_audio, '\0', sizeof(current_audio)); |
1100 SDL_memset(open_devices, '\0', sizeof(open_devices)); | |
0 | 1101 } |
1102 | |
1982
3b4ce57c6215
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|
1103 #define NUM_FORMATS 10 |
0 | 1104 static int format_idx; |
1105 static int format_idx_sub; | |
1982
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First shot at new audio data types (int32 and float32).
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1106 static SDL_AudioFormat format_list[NUM_FORMATS][NUM_FORMATS] = { |
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1107 {AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, |
1982
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|
1108 AUDIO_U16MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB}, |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1109 {AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1110 AUDIO_U16MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB}, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1111 {AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S32LSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1112 AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_U8, AUDIO_S8}, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1113 {AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S32MSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1114 AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_U8, AUDIO_S8}, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1115 {AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_S32LSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1116 AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_U8, AUDIO_S8}, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1117 {AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_S32MSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1118 AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_U8, AUDIO_S8}, |
1993
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
1119 {AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_S16LSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
1120 AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8}, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
1121 {AUDIO_S32MSB, AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_S16MSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
1122 AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8}, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
1123 {AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_S16LSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
1124 AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8}, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
1125 {AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_S32MSB, AUDIO_S32LSB, AUDIO_S16MSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
1126 AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8}, |
0 | 1127 }; |
1128 | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1129 SDL_AudioFormat |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1130 SDL_FirstAudioFormat(SDL_AudioFormat format) |
0 | 1131 { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1132 for (format_idx = 0; format_idx < NUM_FORMATS; ++format_idx) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1133 if (format_list[format_idx][0] == format) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1134 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1135 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1136 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1137 format_idx_sub = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1138 return (SDL_NextAudioFormat()); |
0 | 1139 } |
1140 | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1141 SDL_AudioFormat |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1142 SDL_NextAudioFormat(void) |
0 | 1143 { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1144 if ((format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1145 return (0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1146 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1147 return (format_list[format_idx][format_idx_sub++]); |
0 | 1148 } |
1149 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1150 void |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1151 SDL_CalculateAudioSpec(SDL_AudioSpec * spec) |
0 | 1152 { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1153 switch (spec->format) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1154 case AUDIO_U8: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1155 spec->silence = 0x80; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1156 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1157 default: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1158 spec->silence = 0x00; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1159 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1160 } |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1161 spec->size = SDL_AUDIO_BITSIZE(spec->format) / 8; |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1162 spec->size *= spec->channels; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1163 spec->size *= spec->samples; |
0 | 1164 } |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1165 |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1166 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1167 /* |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1168 * Moved here from SDL_mixer.c, since it relies on internals of an opened |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1169 * audio device (and is deprecated, by the way!). |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1170 */ |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1171 void |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1172 SDL_MixAudio(Uint8 * dst, const Uint8 * src, Uint32 len, int volume) |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1173 { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1174 /* Mix the user-level audio format */ |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1175 SDL_AudioDevice *device = get_audio_device(1); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1176 if (device != NULL) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1177 SDL_AudioFormat format; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1178 if (device->convert.needed) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1179 format = device->convert.src_format; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1180 } else { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1181 format = device->spec.format; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1182 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1183 SDL_MixAudioFormat(dst, src, format, len, volume); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1184 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1185 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1186 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
1187 /* vi: set ts=4 sw=4 expandtab: */ |