Mercurial > sdl-ios-xcode
annotate src/audio/SDL_audio.c @ 3273:e0dfba770eb7
Removed outdated OS/2 support
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 19 Sep 2009 07:22:07 +0000 |
parents | e8f63b28947d |
children | 1ed5d432e468 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
2859 | 3 Copyright (C) 1997-2009 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" | |
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27 #include "SDL_audio.h" |
0 | 28 #include "SDL_audio_c.h" |
29 #include "SDL_audiomem.h" | |
30 #include "SDL_sysaudio.h" | |
31 | |
2979 | 32 #define _THIS SDL_AudioDevice *this |
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33 |
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34 static SDL_AudioDriver current_audio; |
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35 static SDL_AudioDevice *open_devices[16]; |
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36 |
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37 /* !!! FIXME: These are wordy and unlocalized... */ |
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38 #define DEFAULT_OUTPUT_DEVNAME "System audio output device" |
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39 #define DEFAULT_INPUT_DEVNAME "System audio capture device" |
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40 |
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41 |
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42 /* |
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43 * Not all of these will be compiled and linked in, but it's convenient |
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44 * to have a complete list here and saves yet-another block of #ifdefs... |
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45 * Please see bootstrap[], below, for the actual #ifdef mess. |
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46 */ |
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47 extern AudioBootStrap BSD_AUDIO_bootstrap; |
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48 extern AudioBootStrap DSP_bootstrap; |
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49 extern AudioBootStrap DMA_bootstrap; |
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50 extern AudioBootStrap ALSA_bootstrap; |
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51 extern AudioBootStrap PULSEAUDIO_bootstrap; |
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52 extern AudioBootStrap QSAAUDIO_bootstrap; |
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53 extern AudioBootStrap SUNAUDIO_bootstrap; |
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54 extern AudioBootStrap DMEDIA_bootstrap; |
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55 extern AudioBootStrap ARTS_bootstrap; |
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56 extern AudioBootStrap ESD_bootstrap; |
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57 extern AudioBootStrap NAS_bootstrap; |
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58 extern AudioBootStrap DSOUND_bootstrap; |
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59 extern AudioBootStrap WINWAVEOUT_bootstrap; |
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60 extern AudioBootStrap PAUDIO_bootstrap; |
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61 extern AudioBootStrap BEOSAUDIO_bootstrap; |
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62 extern AudioBootStrap COREAUDIO_bootstrap; |
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63 extern AudioBootStrap COREAUDIOIPHONE_bootstrap; |
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64 extern AudioBootStrap SNDMGR_bootstrap; |
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65 extern AudioBootStrap MINTAUDIO_GSXB_bootstrap; |
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66 extern AudioBootStrap MINTAUDIO_MCSN_bootstrap; |
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67 extern AudioBootStrap MINTAUDIO_STFA_bootstrap; |
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68 extern AudioBootStrap MINTAUDIO_XBIOS_bootstrap; |
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69 extern AudioBootStrap MINTAUDIO_DMA8_bootstrap; |
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70 extern AudioBootStrap DISKAUD_bootstrap; |
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71 extern AudioBootStrap DUMMYAUD_bootstrap; |
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72 extern AudioBootStrap DCAUD_bootstrap; |
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73 extern AudioBootStrap MMEAUDIO_bootstrap; |
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74 extern AudioBootStrap DART_bootstrap; |
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75 extern AudioBootStrap NDSAUD_bootstrap; |
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76 extern AudioBootStrap FUSIONSOUND_bootstrap; |
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77 |
1190 | 78 |
0 | 79 /* Available audio drivers */ |
3162 | 80 static const AudioBootStrap *const bootstrap[] = { |
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81 #if SDL_AUDIO_DRIVER_BSD |
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82 &BSD_AUDIO_bootstrap, |
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83 #endif |
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84 #if SDL_AUDIO_DRIVER_PULSEAUDIO |
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85 &PULSEAUDIO_bootstrap, |
0 | 86 #endif |
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87 #if SDL_AUDIO_DRIVER_ALSA |
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88 &ALSA_bootstrap, |
0 | 89 #endif |
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90 #if SDL_AUDIO_DRIVER_OSS |
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91 &DSP_bootstrap, |
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92 &DMA_bootstrap, |
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93 #endif |
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94 #if SDL_AUDIO_DRIVER_QSA |
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95 &QSAAUDIO_bootstrap, |
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96 #endif |
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97 #if SDL_AUDIO_DRIVER_SUNAUDIO |
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98 &SUNAUDIO_bootstrap, |
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99 #endif |
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100 #if SDL_AUDIO_DRIVER_DMEDIA |
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101 &DMEDIA_bootstrap, |
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102 #endif |
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103 #if SDL_AUDIO_DRIVER_ARTS |
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104 &ARTS_bootstrap, |
0 | 105 #endif |
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106 #if SDL_AUDIO_DRIVER_ESD |
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107 &ESD_bootstrap, |
0 | 108 #endif |
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109 #if SDL_AUDIO_DRIVER_NAS |
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110 &NAS_bootstrap, |
0 | 111 #endif |
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112 #if SDL_AUDIO_DRIVER_DSOUND |
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113 &DSOUND_bootstrap, |
0 | 114 #endif |
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115 #if SDL_AUDIO_DRIVER_WINWAVEOUT |
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116 &WINWAVEOUT_bootstrap, |
0 | 117 #endif |
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118 #if SDL_AUDIO_DRIVER_PAUDIO |
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119 &PAUDIO_bootstrap, |
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120 #endif |
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121 #if SDL_AUDIO_DRIVER_BEOSAUDIO |
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122 &BEOSAUDIO_bootstrap, |
0 | 123 #endif |
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124 #if SDL_AUDIO_DRIVER_COREAUDIO |
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125 &COREAUDIO_bootstrap, |
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126 #endif |
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127 #if SDL_AUDIO_DRIVER_COREAUDIOIPHONE |
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128 &COREAUDIOIPHONE_bootstrap, |
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129 #endif |
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130 #if SDL_AUDIO_DRIVER_MINT |
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131 &MINTAUDIO_GSXB_bootstrap, |
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132 &MINTAUDIO_MCSN_bootstrap, |
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133 &MINTAUDIO_STFA_bootstrap, |
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134 &MINTAUDIO_XBIOS_bootstrap, |
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135 &MINTAUDIO_DMA8_bootstrap, |
398
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136 #endif |
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137 #if SDL_AUDIO_DRIVER_DISK |
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138 &DISKAUD_bootstrap, |
68
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139 #endif |
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140 #if SDL_AUDIO_DRIVER_DUMMY |
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141 &DUMMYAUD_bootstrap, |
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142 #endif |
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143 #if SDL_AUDIO_DRIVER_MMEAUDIO |
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144 &MMEAUDIO_bootstrap, |
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145 #endif |
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146 #if SDL_AUDIO_DRIVER_NDS |
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147 &NDSAUD_bootstrap, |
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148 #endif |
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149 #if SDL_AUDIO_DRIVER_FUSIONSOUND |
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150 &FUSIONSOUND_bootstrap, |
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151 #endif |
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152 NULL |
0 | 153 }; |
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154 |
2060 | 155 static SDL_AudioDevice * |
156 get_audio_device(SDL_AudioDeviceID id) | |
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157 { |
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158 id--; |
2060 | 159 if ((id >= SDL_arraysize(open_devices)) || (open_devices[id] == NULL)) { |
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160 SDL_SetError("Invalid audio device ID"); |
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161 return NULL; |
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162 } |
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163 |
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164 return open_devices[id]; |
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165 } |
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166 |
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167 |
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168 /* stubs for audio drivers that don't need a specific entry point... */ |
2060 | 169 static int |
170 SDL_AudioDetectDevices_Default(int iscapture) | |
171 { | |
172 return -1; | |
173 } | |
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174 |
2060 | 175 static void |
176 SDL_AudioThreadInit_Default(_THIS) | |
177 { /* no-op. */ | |
178 } | |
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179 |
2060 | 180 static void |
181 SDL_AudioWaitDevice_Default(_THIS) | |
182 { /* no-op. */ | |
183 } | |
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184 |
2060 | 185 static void |
186 SDL_AudioPlayDevice_Default(_THIS) | |
187 { /* no-op. */ | |
188 } | |
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189 |
2060 | 190 static Uint8 * |
191 SDL_AudioGetDeviceBuf_Default(_THIS) | |
192 { | |
193 return NULL; | |
194 } | |
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195 |
2060 | 196 static void |
197 SDL_AudioWaitDone_Default(_THIS) | |
198 { /* no-op. */ | |
199 } | |
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200 |
2060 | 201 static void |
202 SDL_AudioCloseDevice_Default(_THIS) | |
203 { /* no-op. */ | |
204 } | |
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205 |
2060 | 206 static void |
207 SDL_AudioDeinitialize_Default(void) | |
208 { /* no-op. */ | |
209 } | |
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210 |
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211 static int |
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212 SDL_AudioOpenDevice_Default(_THIS, const char *devname, int iscapture) |
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213 { |
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214 return 0; |
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215 } |
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216 |
2060 | 217 static const char * |
218 SDL_AudioGetDeviceName_Default(int index, int iscapture) | |
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219 { |
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220 SDL_SetError("No such device"); |
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221 return NULL; |
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222 } |
0 | 223 |
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224 static void |
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225 SDL_AudioLockDevice_Default(SDL_AudioDevice * device) |
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226 { |
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227 if (device->thread && (SDL_ThreadID() == device->threadid)) { |
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228 return; |
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229 } |
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230 SDL_mutexP(device->mixer_lock); |
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231 } |
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232 |
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233 static void |
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234 SDL_AudioUnlockDevice_Default(SDL_AudioDevice * device) |
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235 { |
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236 if (device->thread && (SDL_ThreadID() == device->threadid)) { |
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237 return; |
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238 } |
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239 SDL_mutexV(device->mixer_lock); |
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240 } |
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241 |
0 | 242 |
2060 | 243 static void |
244 finalize_audio_entry_points(void) | |
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245 { |
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246 /* |
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247 * Fill in stub functions for unused driver entry points. This lets us |
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248 * blindly call them without having to check for validity first. |
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249 */ |
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250 |
2060 | 251 #define FILL_STUB(x) \ |
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252 if (current_audio.impl.x == NULL) { \ |
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253 current_audio.impl.x = SDL_Audio##x##_Default; \ |
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254 } |
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255 FILL_STUB(DetectDevices); |
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256 FILL_STUB(GetDeviceName); |
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257 FILL_STUB(OpenDevice); |
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258 FILL_STUB(ThreadInit); |
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259 FILL_STUB(WaitDevice); |
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260 FILL_STUB(PlayDevice); |
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261 FILL_STUB(GetDeviceBuf); |
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262 FILL_STUB(WaitDone); |
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263 FILL_STUB(CloseDevice); |
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264 FILL_STUB(LockDevice); |
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265 FILL_STUB(UnlockDevice); |
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266 FILL_STUB(Deinitialize); |
2060 | 267 #undef FILL_STUB |
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268 } |
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269 |
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270 /* Streaming functions (for when the input and output buffer sizes are different) */ |
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271 /* Write [length] bytes from buf into the streamer */ |
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272 void |
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273 SDL_StreamWrite(SDL_AudioStreamer * stream, Uint8 * buf, int length) |
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274 { |
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275 int i; |
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276 |
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277 for (i = 0; i < length; ++i) { |
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278 stream->buffer[stream->write_pos] = buf[i]; |
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279 ++stream->write_pos; |
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280 } |
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281 } |
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282 |
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283 /* Read [length] bytes out of the streamer into buf */ |
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284 void |
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285 SDL_StreamRead(SDL_AudioStreamer * stream, Uint8 * buf, int length) |
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286 { |
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287 int i; |
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288 |
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289 for (i = 0; i < length; ++i) { |
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290 buf[i] = stream->buffer[stream->read_pos]; |
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291 ++stream->read_pos; |
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292 } |
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293 } |
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294 |
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295 int |
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296 SDL_StreamLength(SDL_AudioStreamer * stream) |
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297 { |
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298 return (stream->write_pos - stream->read_pos) % stream->max_len; |
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299 } |
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300 |
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301 /* Initialize the stream by allocating the buffer and setting the read/write heads to the beginning */ |
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302 int |
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303 SDL_StreamInit(SDL_AudioStreamer * stream, int max_len, Uint8 silence) |
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304 { |
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305 /* First try to allocate the buffer */ |
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306 stream->buffer = (Uint8 *) SDL_malloc(max_len); |
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307 if (stream->buffer == NULL) { |
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308 return -1; |
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309 } |
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310 |
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311 stream->max_len = max_len; |
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312 stream->read_pos = 0; |
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313 stream->write_pos = 0; |
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314 |
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315 /* Zero out the buffer */ |
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316 SDL_memset(stream->buffer, silence, max_len); |
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317 |
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318 return 0; |
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319 } |
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320 |
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321 /* Deinitialize the stream simply by freeing the buffer */ |
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322 void |
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323 SDL_StreamDeinit(SDL_AudioStreamer * stream) |
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324 { |
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325 if (stream->buffer != NULL) { |
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326 SDL_free(stream->buffer); |
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327 } |
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328 } |
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329 |
0 | 330 |
331 /* The general mixing thread function */ | |
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332 int SDLCALL |
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333 SDL_RunAudio(void *devicep) |
0 | 334 { |
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335 SDL_AudioDevice *device = (SDL_AudioDevice *) devicep; |
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336 Uint8 *stream; |
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337 int stream_len; |
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338 void *udata; |
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339 void (SDLCALL * fill) (void *userdata, Uint8 * stream, int len); |
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340 int silence; |
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341 |
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342 /* For streaming when the buffer sizes don't match up */ |
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343 Uint8 *istream; |
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344 int istream_len; |
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346 /* Perform any thread setup */ |
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347 device->threadid = SDL_ThreadID(); |
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348 current_audio.impl.ThreadInit(device); |
0 | 349 |
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350 /* Set up the mixing function */ |
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351 fill = device->spec.callback; |
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352 udata = device->spec.userdata; |
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353 |
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354 /* By default do not stream */ |
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355 device->use_streamer = 0; |
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356 |
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357 if (device->convert.needed) { |
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358 if (device->convert.src_format == AUDIO_U8) { |
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359 silence = 0x80; |
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360 } else { |
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361 silence = 0; |
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362 } |
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363 |
3040 | 364 #if 0 /* !!! FIXME: I took len_div out of the structure. Use rate_incr instead? */ |
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365 /* If the result of the conversion alters the length, i.e. resampling is being used, use the streamer */ |
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366 if (device->convert.len_mult != 1 || device->convert.len_div != 1) { |
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367 /* The streamer's maximum length should be twice whichever is larger: spec.size or len_cvt */ |
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368 stream_max_len = 2 * device->spec.size; |
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369 if (device->convert.len_mult > device->convert.len_div) { |
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370 stream_max_len *= device->convert.len_mult; |
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371 stream_max_len /= device->convert.len_div; |
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372 } |
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373 if (SDL_StreamInit(&device->streamer, stream_max_len, silence) < |
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374 0) |
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375 return -1; |
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376 device->use_streamer = 1; |
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377 |
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378 /* istream_len should be the length of what we grab from the callback and feed to conversion, |
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379 so that we get close to spec_size. I.e. we want device.spec_size = istream_len * u / d |
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380 */ |
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381 istream_len = |
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382 device->spec.size * device->convert.len_div / |
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383 device->convert.len_mult; |
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384 } |
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385 #endif |
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386 |
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387 /* stream_len = device->convert.len; */ |
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388 stream_len = device->spec.size; |
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389 } else { |
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390 silence = device->spec.silence; |
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391 stream_len = device->spec.size; |
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392 } |
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393 |
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394 /* Determine if the streamer is necessary here */ |
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395 if (device->use_streamer == 1) { |
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396 /* This code is almost the same as the old code. The difference is, instead of reding |
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397 directly from the callback into "stream", then converting and sending the audio off, |
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398 we go: callback -> "istream" -> (conversion) -> streamer -> stream -> device. |
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399 However, reading and writing with streamer are done separately: |
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400 - We only call the callback and write to the streamer when the streamer does not |
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401 contain enough samples to output to the device. |
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402 - We only read from the streamer and tell the device to play when the streamer |
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403 does have enough samples to output. |
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404 This allows us to perform resampling in the conversion step, where the output of the |
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405 resampling process can be any number. We will have to see what a good size for the |
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406 stream's maximum length is, but I suspect 2*max(len_cvt, stream_len) is a good figure. |
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407 */ |
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408 while (device->enabled) { |
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409 /* 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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410 if (SDL_StreamLength(&device->streamer) < stream_len) { |
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411 /* Set up istream */ |
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412 if (device->convert.needed) { |
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413 if (device->convert.buf) { |
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414 istream = device->convert.buf; |
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415 } else { |
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416 continue; |
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417 } |
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418 } else { |
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419 istream = current_audio.impl.GetDeviceBuf(device); |
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420 if (istream == NULL) { |
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421 istream = device->fake_stream; |
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422 } |
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423 } |
0 | 424 |
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425 /* Read from the callback into the _input_ stream */ |
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426 if (!device->paused) { |
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427 SDL_mutexP(device->mixer_lock); |
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428 (*fill) (udata, istream, istream_len); |
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429 SDL_mutexV(device->mixer_lock); |
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430 } |
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431 |
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432 /* Convert the audio if necessary and write to the streamer */ |
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433 if (device->convert.needed) { |
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434 SDL_ConvertAudio(&device->convert); |
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435 if (istream == NULL) { |
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436 istream = device->fake_stream; |
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437 } |
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438 /*SDL_memcpy(istream, device->convert.buf, device->convert.len_cvt); */ |
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439 SDL_StreamWrite(&device->streamer, device->convert.buf, |
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440 device->convert.len_cvt); |
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441 } else { |
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442 SDL_StreamWrite(&device->streamer, istream, istream_len); |
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443 } |
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444 } |
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445 |
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446 /* Only output audio if the streamer has enough to output */ |
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447 if (SDL_StreamLength(&device->streamer) >= stream_len) { |
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448 /* Set up the output stream */ |
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449 if (device->convert.needed) { |
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450 if (device->convert.buf) { |
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451 stream = device->convert.buf; |
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452 } else { |
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453 continue; |
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454 } |
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455 } else { |
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456 stream = current_audio.impl.GetDeviceBuf(device); |
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457 if (stream == NULL) { |
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458 stream = device->fake_stream; |
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459 } |
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460 } |
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461 |
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462 /* Now read from the streamer */ |
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463 SDL_StreamRead(&device->streamer, stream, stream_len); |
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464 |
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465 /* Ready current buffer for play and change current buffer */ |
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466 if (stream != device->fake_stream && !device->paused) { |
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467 current_audio.impl.PlayDevice(device); |
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468 /* Wait for an audio buffer to become available */ |
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469 current_audio.impl.WaitDevice(device); |
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470 } else { |
3139 | 471 SDL_Delay((device->spec.samples * 1000) / |
472 device->spec.freq); | |
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473 } |
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474 } |
0 | 475 |
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476 } |
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477 } else { |
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478 /* Otherwise, do not use the streamer. This is the old code. */ |
0 | 479 |
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480 /* Loop, filling the audio buffers */ |
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481 while (device->enabled) { |
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482 |
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483 /* Fill the current buffer with sound */ |
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484 if (device->convert.needed) { |
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485 if (device->convert.buf) { |
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486 stream = device->convert.buf; |
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487 } else { |
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488 continue; |
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489 } |
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490 } else { |
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491 stream = current_audio.impl.GetDeviceBuf(device); |
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492 if (stream == NULL) { |
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493 stream = device->fake_stream; |
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494 } |
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495 } |
0 | 496 |
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497 if (!device->paused) { |
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498 SDL_mutexP(device->mixer_lock); |
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499 (*fill) (udata, stream, stream_len); |
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500 SDL_mutexV(device->mixer_lock); |
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501 } |
1562 | 502 |
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503 /* Convert the audio if necessary */ |
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504 if (device->convert.needed) { |
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505 SDL_ConvertAudio(&device->convert); |
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506 stream = current_audio.impl.GetDeviceBuf(device); |
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507 if (stream == NULL) { |
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508 stream = device->fake_stream; |
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509 } |
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510 SDL_memcpy(stream, device->convert.buf, |
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511 device->convert.len_cvt); |
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512 } |
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513 |
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514 /* Ready current buffer for play and change current buffer */ |
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515 if (stream != device->fake_stream && !device->paused) { |
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516 current_audio.impl.PlayDevice(device); |
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517 /* Wait for an audio buffer to become available */ |
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518 current_audio.impl.WaitDevice(device); |
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519 } else { |
3139 | 520 SDL_Delay((device->spec.samples * 1000) / device->spec.freq); |
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521 } |
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522 } |
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523 } |
1562 | 524 |
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525 /* Wait for the audio to drain.. */ |
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526 current_audio.impl.WaitDone(device); |
21
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527 |
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528 /* If necessary, deinit the streamer */ |
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529 if (device->use_streamer == 1) |
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530 SDL_StreamDeinit(&device->streamer); |
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531 |
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532 return (0); |
0 | 533 } |
534 | |
322
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535 |
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536 static SDL_AudioFormat |
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537 SDL_ParseAudioFormat(const char *string) |
1794 | 538 { |
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539 #define CHECK_FMT_STRING(x) if (SDL_strcmp(string, #x) == 0) return AUDIO_##x |
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540 CHECK_FMT_STRING(U8); |
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541 CHECK_FMT_STRING(S8); |
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542 CHECK_FMT_STRING(U16LSB); |
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543 CHECK_FMT_STRING(S16LSB); |
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544 CHECK_FMT_STRING(U16MSB); |
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545 CHECK_FMT_STRING(S16MSB); |
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546 CHECK_FMT_STRING(U16SYS); |
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547 CHECK_FMT_STRING(S16SYS); |
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548 CHECK_FMT_STRING(U16); |
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549 CHECK_FMT_STRING(S16); |
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550 CHECK_FMT_STRING(S32LSB); |
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551 CHECK_FMT_STRING(S32MSB); |
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552 CHECK_FMT_STRING(S32SYS); |
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553 CHECK_FMT_STRING(S32); |
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554 CHECK_FMT_STRING(F32LSB); |
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555 CHECK_FMT_STRING(F32MSB); |
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556 CHECK_FMT_STRING(F32SYS); |
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557 CHECK_FMT_STRING(F32); |
2060 | 558 #undef CHECK_FMT_STRING |
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559 return 0; |
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560 } |
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561 |
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562 int |
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563 SDL_GetNumAudioDrivers(void) |
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564 { |
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565 return (SDL_arraysize(bootstrap) - 1); |
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566 } |
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567 |
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568 const char * |
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569 SDL_GetAudioDriver(int index) |
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570 { |
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571 if (index >= 0 && index < SDL_GetNumAudioDrivers()) { |
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572 return (bootstrap[index]->name); |
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573 } |
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574 return (NULL); |
1794 | 575 } |
576 | |
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577 int |
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578 SDL_AudioInit(const char *driver_name) |
0 | 579 { |
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580 int i = 0; |
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581 int initialized = 0; |
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582 int tried_to_init = 0; |
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583 int rc = 0; |
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584 int best_choice = -1; |
0 | 585 |
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586 if (SDL_WasInit(SDL_INIT_AUDIO)) { |
2060 | 587 SDL_AudioQuit(); /* shutdown driver if already running. */ |
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588 } |
0 | 589 |
2060 | 590 SDL_memset(¤t_audio, '\0', sizeof(current_audio)); |
591 SDL_memset(open_devices, '\0', sizeof(open_devices)); | |
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592 |
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593 /* Select the proper audio driver */ |
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Look at environment variables in SDL_VideoInit() and SDL_AudioInit()
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594 if (driver_name == NULL) { |
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595 driver_name = SDL_getenv("SDL_AUDIODRIVER"); |
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596 } |
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597 |
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598 for (i = 0; (!initialized) && (bootstrap[i]); ++i) { |
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599 /* make sure we should even try this driver before doing so... */ |
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600 const AudioBootStrap *backend = bootstrap[i]; |
2060 | 601 if (((driver_name) && (SDL_strcasecmp(backend->name, driver_name))) || |
602 ((!driver_name) && (backend->demand_only))) { | |
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603 continue; |
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604 } |
0 | 605 |
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606 tried_to_init = 1; |
2060 | 607 SDL_memset(¤t_audio, 0, sizeof(current_audio)); |
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608 current_audio.name = backend->name; |
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609 current_audio.desc = backend->desc; |
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610 rc = backend->init(¤t_audio.impl); |
2942 | 611 if (rc == 2) { /* init'd, and devices available. Take it! */ |
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612 initialized = 1; |
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613 best_choice = i; |
2942 | 614 } else if (rc == 1) { /* init'd, but can't see any devices. */ |
2979 | 615 if (current_audio.impl.Deinitialize) { |
616 current_audio.impl.Deinitialize(); | |
617 } | |
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618 if (best_choice == -1) { |
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619 best_choice = i; |
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620 } |
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621 } |
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622 } |
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623 |
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624 /* No definite choice. Pick one that works but can't promise a device. */ |
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625 if ((!initialized) && (best_choice != -1)) { |
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626 const AudioBootStrap *backend = bootstrap[best_choice]; |
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627 SDL_memset(¤t_audio, 0, sizeof(current_audio)); |
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628 current_audio.name = backend->name; |
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629 current_audio.desc = backend->desc; |
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630 initialized = (backend->init(¤t_audio.impl) > 0); |
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631 } |
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632 |
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633 if (!initialized) { |
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634 /* specific drivers will set the error message if they fail... */ |
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635 if (!tried_to_init) { |
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636 if (driver_name) { |
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637 SDL_SetError("%s not available", driver_name); |
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638 } else { |
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639 SDL_SetError("No available audio device"); |
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640 } |
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641 } |
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642 |
2060 | 643 SDL_memset(¤t_audio, 0, sizeof(current_audio)); |
644 return (-1); /* No driver was available, so fail. */ | |
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645 } |
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646 |
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647 finalize_audio_entry_points(); |
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648 |
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649 return (0); |
0 | 650 } |
651 | |
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652 /* |
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653 * Get the current audio driver name |
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654 */ |
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655 const char * |
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656 SDL_GetCurrentAudioDriver() |
0 | 657 { |
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658 return current_audio.name; |
0 | 659 } |
660 | |
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661 |
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662 int |
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663 SDL_GetNumAudioDevices(int iscapture) |
0 | 664 { |
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665 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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666 return -1; |
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667 } |
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668 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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669 return 0; |
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670 } |
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671 |
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672 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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673 return 1; |
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674 } |
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675 |
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676 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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677 return 1; |
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678 } |
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679 |
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680 return current_audio.impl.DetectDevices(iscapture); |
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681 } |
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682 |
0 | 683 |
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684 const char * |
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685 SDL_GetAudioDeviceName(int index, int iscapture) |
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686 { |
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687 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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688 SDL_SetError("Audio subsystem is not initialized"); |
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689 return NULL; |
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690 } |
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691 |
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692 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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693 SDL_SetError("No capture support"); |
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694 return NULL; |
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695 } |
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696 |
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697 if (index < 0) { |
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698 SDL_SetError("No such device"); |
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699 return NULL; |
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700 } |
0 | 701 |
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702 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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703 return DEFAULT_INPUT_DEVNAME; |
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|
704 } |
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705 |
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706 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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707 return DEFAULT_OUTPUT_DEVNAME; |
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708 } |
262
ba5363e21df8
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|
709 |
2049
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710 return current_audio.impl.GetDeviceName(index, iscapture); |
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|
711 } |
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|
712 |
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|
713 |
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|
714 static void |
2060 | 715 close_audio_device(SDL_AudioDevice * device) |
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716 { |
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|
717 device->enabled = 0; |
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718 if (device->thread != NULL) { |
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|
719 SDL_WaitThread(device->thread, NULL); |
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|
720 } |
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|
721 if (device->mixer_lock != NULL) { |
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|
722 SDL_DestroyMutex(device->mixer_lock); |
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|
723 } |
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changeset
|
724 if (device->fake_stream != NULL) { |
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|
725 SDL_FreeAudioMem(device->fake_stream); |
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|
726 } |
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|
727 if (device->convert.needed) { |
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|
728 SDL_FreeAudioMem(device->convert.buf); |
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|
729 } |
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|
730 if (device->opened) { |
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|
731 current_audio.impl.CloseDevice(device); |
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|
732 device->opened = 0; |
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|
733 } |
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|
734 SDL_FreeAudioMem(device); |
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|
735 } |
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|
736 |
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|
737 |
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|
738 /* |
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|
739 * Sanity check desired AudioSpec for SDL_OpenAudio() in (orig). |
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|
740 * Fills in a sanitized copy in (prepared). |
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|
741 * Returns non-zero if okay, zero on fatal parameters in (orig). |
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|
742 */ |
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|
743 static int |
2060 | 744 prepare_audiospec(const SDL_AudioSpec * orig, SDL_AudioSpec * prepared) |
2049
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|
745 { |
2060 | 746 SDL_memcpy(prepared, orig, sizeof(SDL_AudioSpec)); |
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|
747 |
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|
748 if (orig->callback == NULL) { |
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|
749 SDL_SetError("SDL_OpenAudio() passed a NULL callback"); |
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|
750 return 0; |
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|
751 } |
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752 |
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753 if (orig->freq == 0) { |
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diff
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|
754 const char *env = SDL_getenv("SDL_AUDIO_FREQUENCY"); |
2060 | 755 if ((!env) || ((prepared->freq = SDL_atoi(env)) == 0)) { |
756 prepared->freq = 22050; /* a reasonable default */ | |
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757 } |
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758 } |
2049
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|
759 |
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|
760 if (orig->format == 0) { |
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761 const char *env = SDL_getenv("SDL_AUDIO_FORMAT"); |
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762 if ((!env) || ((prepared->format = SDL_ParseAudioFormat(env)) == 0)) { |
2060 | 763 prepared->format = AUDIO_S16; /* a reasonable default */ |
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|
764 } |
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|
765 } |
2049
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|
766 |
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|
767 switch (orig->channels) { |
2060 | 768 case 0:{ |
769 const char *env = SDL_getenv("SDL_AUDIO_CHANNELS"); | |
2141 | 770 if ((!env) || ((prepared->channels = (Uint8) SDL_atoi(env)) == 0)) { |
2060 | 771 prepared->channels = 2; /* a reasonable default */ |
772 } | |
773 break; | |
2049
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774 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
775 case 1: /* Mono */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
776 case 2: /* Stereo */ |
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777 case 4: /* surround */ |
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diff
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|
778 case 6: /* surround with center and lfe */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
779 break; |
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diff
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|
780 default: |
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|
781 SDL_SetError("Unsupported number of audio channels."); |
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|
782 return 0; |
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|
783 } |
2049
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|
784 |
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|
785 if (orig->samples == 0) { |
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|
786 const char *env = SDL_getenv("SDL_AUDIO_SAMPLES"); |
2060 | 787 if ((!env) || ((prepared->samples = (Uint16) SDL_atoi(env)) == 0)) { |
2049
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|
788 /* Pick a default of ~46 ms at desired frequency */ |
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|
789 /* !!! FIXME: remove this when the non-Po2 resampling is in. */ |
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|
790 const int samples = (prepared->freq / 1000) * 46; |
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|
791 int power2 = 1; |
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|
792 while (power2 < samples) { |
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793 power2 *= 2; |
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|
794 } |
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|
795 prepared->samples = power2; |
1895
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|
796 } |
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|
797 } |
0 | 798 |
1895
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|
799 /* Calculate the silence and size of the audio specification */ |
2049
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800 SDL_CalculateAudioSpec(prepared); |
21
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|
801 |
2049
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|
802 return 1; |
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|
803 } |
1408
ceb5c2fec4f1
Fixed some preprocessor mangling
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1406
diff
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|
804 |
21
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diff
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|
805 |
2049
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|
806 static SDL_AudioDeviceID |
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|
807 open_audio_device(const char *devname, int iscapture, |
2866
e532417a6977
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|
808 const SDL_AudioSpec * desired, SDL_AudioSpec * obtained, |
e532417a6977
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|
809 int allowed_changes, int min_id) |
2049
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|
810 { |
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|
811 SDL_AudioDeviceID id = 0; |
2866
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diff
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|
812 SDL_AudioSpec _obtained; |
2049
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|
813 SDL_AudioDevice *device; |
2866
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Fixed SDL 1.2 compatibility problem.
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|
814 SDL_bool build_cvt; |
2049
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815 int i = 0; |
21
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|
816 |
2049
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|
817 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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|
818 SDL_SetError("Audio subsystem is not initialized"); |
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|
819 return 0; |
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|
820 } |
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|
821 |
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822 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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|
823 SDL_SetError("No capture support"); |
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824 return 0; |
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|
825 } |
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|
826 |
2866
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|
827 if (!obtained) { |
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Fixed SDL 1.2 compatibility problem.
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|
828 obtained = &_obtained; |
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|
829 } |
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|
830 if (!prepare_audiospec(desired, obtained)) { |
2049
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831 return 0; |
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|
832 } |
5f6550e5184f
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changeset
|
833 |
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834 /* If app doesn't care about a specific device, let the user override. */ |
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|
835 if (devname == NULL) { |
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|
836 devname = SDL_getenv("SDL_AUDIO_DEVICE_NAME"); |
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|
837 } |
21
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|
838 |
2049
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|
839 /* |
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|
840 * Catch device names at the high level for the simple case... |
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841 * This lets us have a basic "device enumeration" for systems that |
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|
842 * don't have multiple devices, but makes sure the device name is |
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|
843 * always NULL when it hits the low level. |
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|
844 * |
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845 * Also make sure that the simple case prevents multiple simultaneous |
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|
846 * opens of the default system device. |
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|
847 */ |
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|
848 |
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849 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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|
850 if ((devname) && (SDL_strcmp(devname, DEFAULT_INPUT_DEVNAME) != 0)) { |
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|
851 SDL_SetError("No such device"); |
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|
852 return 0; |
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changeset
|
853 } |
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|
854 devname = NULL; |
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changeset
|
855 |
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changeset
|
856 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
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|
857 if ((open_devices[i]) && (open_devices[i]->iscapture)) { |
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|
858 SDL_SetError("Audio device already open"); |
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|
859 return 0; |
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changeset
|
860 } |
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changeset
|
861 } |
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|
862 } |
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|
863 |
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|
864 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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|
865 if ((devname) && (SDL_strcmp(devname, DEFAULT_OUTPUT_DEVNAME) != 0)) { |
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|
866 SDL_SetError("No such device"); |
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|
867 return 0; |
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|
868 } |
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|
869 devname = NULL; |
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changeset
|
870 |
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|
871 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
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|
872 if ((open_devices[i]) && (!open_devices[i]->iscapture)) { |
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|
873 SDL_SetError("Audio device already open"); |
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|
874 return 0; |
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changeset
|
875 } |
5f6550e5184f
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|
876 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
877 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
878 |
2060 | 879 device = (SDL_AudioDevice *) SDL_AllocAudioMem(sizeof(SDL_AudioDevice)); |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
880 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
|
881 SDL_OutOfMemory(); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
882 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
|
883 } |
2060 | 884 SDL_memset(device, '\0', sizeof(SDL_AudioDevice)); |
2866
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
885 device->spec = *obtained; |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
886 device->enabled = 1; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
887 device->paused = 1; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
888 device->iscapture = iscapture; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
889 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
890 /* Create a semaphore for locking the sound buffers */ |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
891 if (!current_audio.impl.SkipMixerLock) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
892 device->mixer_lock = SDL_CreateMutex(); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
893 if (device->mixer_lock == NULL) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
894 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
|
895 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:
2045
diff
changeset
|
896 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
|
897 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
898 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
899 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
900 if (!current_audio.impl.OpenDevice(device, devname, iscapture)) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
901 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
|
902 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
|
903 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
904 device->opened = 1; |
0 | 905 |
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
|
906 /* Allocate a fake audio memory buffer */ |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
907 device->fake_stream = SDL_AllocAudioMem(device->spec.size); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
908 if (device->fake_stream == NULL) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
909 close_audio_device(device); |
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
|
910 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
|
911 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
|
912 } |
0 | 913 |
2866
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
914 /* If the audio driver changes the buffer size, accept it */ |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
915 if (device->spec.samples != obtained->samples) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
916 obtained->samples = device->spec.samples; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
917 SDL_CalculateAudioSpec(obtained); |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
918 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
919 |
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
|
920 /* See if we need to do any conversion */ |
2866
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
921 build_cvt = SDL_FALSE; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
922 if (obtained->freq != device->spec.freq) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
923 if (allowed_changes & SDL_AUDIO_ALLOW_FREQUENCY_CHANGE) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
924 obtained->freq = device->spec.freq; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
925 } else { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
926 build_cvt = SDL_TRUE; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
927 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
928 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
929 if (obtained->format != device->spec.format) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
930 if (allowed_changes & SDL_AUDIO_ALLOW_FORMAT_CHANGE) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
931 obtained->format = device->spec.format; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
932 } else { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
933 build_cvt = SDL_TRUE; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
934 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
935 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
936 if (obtained->channels != device->spec.channels) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
937 if (allowed_changes & SDL_AUDIO_ALLOW_CHANNELS_CHANGE) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
938 obtained->channels = device->spec.channels; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
939 } else { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
940 build_cvt = SDL_TRUE; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
941 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
942 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
943 if (build_cvt) { |
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
|
944 /* Build an audio conversion block */ |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
945 if (SDL_BuildAudioCVT(&device->convert, |
2866
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
946 obtained->format, obtained->channels, |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
947 obtained->freq, |
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 device->spec.format, device->spec.channels, |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
949 device->spec.freq) < 0) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
950 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
|
951 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
|
952 } |
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 if (device->convert.needed) { |
2866
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
954 device->convert.len = (int) (((double) obtained->size) / |
2060 | 955 device->convert.len_ratio); |
2053
716cf90f24a0
1.3 branch version of revision 2878.
Ryan C. Gordon <icculus@icculus.org>
parents:
2049
diff
changeset
|
956 |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
957 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
|
958 (Uint8 *) SDL_AllocAudioMem(device->convert.len * |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
959 device->convert.len_mult); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
960 if (device->convert.buf == NULL) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
961 close_audio_device(device); |
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
|
962 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
|
963 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
|
964 } |
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
|
965 } |
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
|
966 } |
2049
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.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
968 /* Find an available device ID and store the structure... */ |
2060 | 969 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
|
970 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
|
971 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
|
972 break; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
973 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
974 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
975 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
976 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
|
977 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
|
978 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
|
979 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
|
980 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
981 |
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
|
982 /* 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
|
983 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
|
984 /* 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
|
985 /* !!! FIXME: this is nasty. */ |
1402
d910939febfa
Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents:
1379
diff
changeset
|
986 #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
|
987 #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
|
988 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,
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|
989 #else |
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|
990 device->thread = SDL_CreateThread(SDL_RunAudio, device); |
1330
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991 #endif |
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|
992 if (device->thread == NULL) { |
2060 | 993 SDL_CloseAudioDevice(id + 1); |
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994 SDL_SetError("Couldn't create audio thread"); |
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|
995 return 0; |
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|
996 } |
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|
997 } |
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|
998 |
2060 | 999 return id + 1; |
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|
1000 } |
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|
1001 |
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|
1002 |
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|
1003 int |
2866
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|
1004 SDL_OpenAudio(SDL_AudioSpec * desired, SDL_AudioSpec * obtained) |
2049
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|
1005 { |
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|
1006 SDL_AudioDeviceID id = 0; |
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|
1007 |
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|
1008 /* Start up the audio driver, if necessary. This is legacy behaviour! */ |
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|
1009 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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1010 if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) { |
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1011 return (-1); |
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1012 } |
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|
1013 } |
0 | 1014 |
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|
1015 /* SDL_OpenAudio() is legacy and can only act on Device ID #1. */ |
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|
1016 if (open_devices[0] != NULL) { |
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|
1017 SDL_SetError("Audio device is already opened"); |
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|
1018 return (-1); |
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|
1019 } |
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|
1020 |
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1021 if (obtained) { |
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|
1022 id = open_audio_device(NULL, 0, desired, obtained, |
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|
1023 SDL_AUDIO_ALLOW_ANY_CHANGE, 1); |
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|
1024 } else { |
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|
1025 id = open_audio_device(NULL, 0, desired, desired, 0, 1); |
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|
1026 } |
2060 | 1027 if (id > 1) { /* this should never happen in theory... */ |
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|
1028 SDL_CloseAudioDevice(id); |
2060 | 1029 SDL_SetError("Internal error"); /* MUST be Device ID #1! */ |
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|
1030 return (-1); |
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|
1031 } |
21
75a95f82bc1f
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diff
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|
1032 |
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|
1033 return ((id == 0) ? -1 : 0); |
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|
1034 } |
21
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|
1035 |
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|
1036 SDL_AudioDeviceID |
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|
1037 SDL_OpenAudioDevice(const char *device, int iscapture, |
2866
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|
1038 const SDL_AudioSpec * desired, SDL_AudioSpec * obtained, |
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|
1039 int allowed_changes) |
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|
1040 { |
2866
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|
1041 return open_audio_device(device, iscapture, desired, obtained, |
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|
1042 allowed_changes, 2); |
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1043 } |
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1044 |
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|
1045 SDL_audiostatus |
2049
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|
1046 SDL_GetAudioDeviceStatus(SDL_AudioDeviceID devid) |
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|
1047 { |
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|
1048 SDL_AudioDevice *device = get_audio_device(devid); |
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|
1049 SDL_audiostatus status = SDL_AUDIO_STOPPED; |
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|
1050 if (device && device->enabled) { |
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1051 if (device->paused) { |
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1052 status = SDL_AUDIO_PAUSED; |
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|
1053 } else { |
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|
1054 status = SDL_AUDIO_PLAYING; |
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1055 } |
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|
1056 } |
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|
1057 return (status); |
0 | 1058 } |
1059 | |
2049
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|
1060 |
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|
1061 SDL_audiostatus |
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|
1062 SDL_GetAudioStatus(void) |
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|
1063 { |
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|
1064 return SDL_GetAudioDeviceStatus(1); |
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|
1065 } |
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|
1066 |
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|
1067 void |
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|
1068 SDL_PauseAudioDevice(SDL_AudioDeviceID devid, int pause_on) |
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|
1069 { |
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|
1070 SDL_AudioDevice *device = get_audio_device(devid); |
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|
1071 if (device) { |
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|
1072 device->paused = pause_on; |
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|
1073 } |
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|
1074 } |
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|
1075 |
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|
1076 void |
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|
1077 SDL_PauseAudio(int pause_on) |
0 | 1078 { |
2049
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|
1079 SDL_PauseAudioDevice(1, pause_on); |
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|
1080 } |
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|
1081 |
0 | 1082 |
2049
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|
1083 void |
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|
1084 SDL_LockAudioDevice(SDL_AudioDeviceID devid) |
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|
1085 { |
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|
1086 /* Obtain a lock on the mixing buffers */ |
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|
1087 SDL_AudioDevice *device = get_audio_device(devid); |
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|
1088 if (device) { |
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|
1089 current_audio.impl.LockDevice(device); |
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1090 } |
0 | 1091 } |
1092 | |
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|
1093 void |
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|
1094 SDL_LockAudio(void) |
0 | 1095 { |
2049
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|
1096 SDL_LockAudioDevice(1); |
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|
1097 } |
0 | 1098 |
2049
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|
1099 void |
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|
1100 SDL_UnlockAudioDevice(SDL_AudioDeviceID devid) |
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1101 { |
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|
1102 /* Obtain a lock on the mixing buffers */ |
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|
1103 SDL_AudioDevice *device = get_audio_device(devid); |
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1104 if (device) { |
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Ryan C. Gordon <icculus@icculus.org>
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2045
diff
changeset
|
1105 current_audio.impl.UnlockDevice(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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|
1106 } |
0 | 1107 } |
1108 | |
1895
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|
1109 void |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1110 SDL_UnlockAudio(void) |
0 | 1111 { |
2049
5f6550e5184f
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diff
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|
1112 SDL_UnlockAudioDevice(1); |
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|
1113 } |
0 | 1114 |
2049
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
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diff
changeset
|
1115 void |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
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diff
changeset
|
1116 SDL_CloseAudioDevice(SDL_AudioDeviceID devid) |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
1117 { |
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
|
1118 SDL_AudioDevice *device = get_audio_device(devid); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
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diff
changeset
|
1119 if (device) { |
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
|
1120 close_audio_device(device); |
2060 | 1121 open_devices[devid - 1] = NULL; |
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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|
1122 } |
0 | 1123 } |
1124 | |
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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|
1125 void |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1126 SDL_CloseAudio(void) |
0 | 1127 { |
2049
5f6550e5184f
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parents:
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diff
changeset
|
1128 SDL_CloseAudioDevice(1); |
0 | 1129 } |
1130 | |
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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|
1131 void |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1132 SDL_AudioQuit(void) |
0 | 1133 { |
2049
5f6550e5184f
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diff
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|
1134 SDL_AudioDeviceID i; |
5f6550e5184f
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parents:
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diff
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|
1135 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
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diff
changeset
|
1136 SDL_CloseAudioDevice(i); |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
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diff
changeset
|
1137 } |
0 | 1138 |
2049
5f6550e5184f
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diff
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|
1139 /* Free the driver data */ |
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diff
changeset
|
1140 current_audio.impl.Deinitialize(); |
2060 | 1141 SDL_memset(¤t_audio, '\0', sizeof(current_audio)); |
1142 SDL_memset(open_devices, '\0', sizeof(open_devices)); | |
0 | 1143 } |
1144 | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
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diff
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|
1145 #define NUM_FORMATS 10 |
0 | 1146 static int format_idx; |
1147 static int format_idx_sub; | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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diff
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|
1148 static SDL_AudioFormat format_list[NUM_FORMATS][NUM_FORMATS] = { |
1895
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|
1149 {AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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diff
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|
1150 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.
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|
1151 {AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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diff
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|
1152 AUDIO_U16MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB}, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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diff
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|
1153 {AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S32LSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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diff
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|
1154 AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_U8, AUDIO_S8}, |
3b4ce57c6215
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diff
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|
1155 {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:
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diff
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|
1156 AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_U8, AUDIO_S8}, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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diff
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|
1157 {AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_S32LSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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diff
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|
1158 AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_U8, AUDIO_S8}, |
3b4ce57c6215
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parents:
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diff
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|
1159 {AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_S32MSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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diff
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|
1160 AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_U8, AUDIO_S8}, |
1993
7a3889fc9e5d
Reordered the favored audio format list a little.
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diff
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|
1161 {AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_S16LSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
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diff
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|
1162 AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8}, |
7a3889fc9e5d
Reordered the favored audio format list a little.
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diff
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|
1163 {AUDIO_S32MSB, AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_S16MSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
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diff
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|
1164 AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8}, |
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Reordered the favored audio format list a little.
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diff
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|
1165 {AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_S16LSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
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diff
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|
1166 AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8}, |
7a3889fc9e5d
Reordered the favored audio format list a little.
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diff
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|
1167 {AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_S32MSB, AUDIO_S32LSB, AUDIO_S16MSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
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diff
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|
1168 AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8}, |
0 | 1169 }; |
1170 | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
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|
1171 SDL_AudioFormat |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
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|
1172 SDL_FirstAudioFormat(SDL_AudioFormat format) |
0 | 1173 { |
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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|
1174 for (format_idx = 0; format_idx < NUM_FORMATS; ++format_idx) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1175 if (format_list[format_idx][0] == format) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1176 break; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1177 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1178 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
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|
1179 format_idx_sub = 0; |
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diff
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|
1180 return (SDL_NextAudioFormat()); |
0 | 1181 } |
1182 | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
1183 SDL_AudioFormat |
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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diff
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|
1184 SDL_NextAudioFormat(void) |
0 | 1185 { |
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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|
1186 if ((format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS)) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
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|
1187 return (0); |
c121d94672cb
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diff
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|
1188 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
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|
1189 return (format_list[format_idx][format_idx_sub++]); |
0 | 1190 } |
1191 | |
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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|
1192 void |
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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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1794
diff
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|
1193 SDL_CalculateAudioSpec(SDL_AudioSpec * spec) |
0 | 1194 { |
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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diff
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|
1195 switch (spec->format) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1196 case AUDIO_U8: |
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|
1197 spec->silence = 0x80; |
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|
1198 break; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1199 default: |
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|
1200 spec->silence = 0x00; |
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|
1201 break; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1202 } |
2049
5f6550e5184f
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diff
changeset
|
1203 spec->size = SDL_AUDIO_BITSIZE(spec->format) / 8; |
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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|
1204 spec->size *= spec->channels; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1205 spec->size *= spec->samples; |
0 | 1206 } |
1895
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|
1207 |
2049
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|
1208 |
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diff
changeset
|
1209 /* |
5f6550e5184f
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diff
changeset
|
1210 * Moved here from SDL_mixer.c, since it relies on internals of an opened |
5f6550e5184f
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diff
changeset
|
1211 * audio device (and is deprecated, by the way!). |
5f6550e5184f
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|
1212 */ |
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|
1213 void |
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|
1214 SDL_MixAudio(Uint8 * dst, const Uint8 * src, Uint32 len, int volume) |
5f6550e5184f
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|
1215 { |
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|
1216 /* Mix the user-level audio format */ |
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|
1217 SDL_AudioDevice *device = get_audio_device(1); |
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|
1218 if (device != NULL) { |
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|
1219 SDL_AudioFormat format; |
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diff
changeset
|
1220 if (device->convert.needed) { |
5f6550e5184f
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changeset
|
1221 format = device->convert.src_format; |
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changeset
|
1222 } else { |
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diff
changeset
|
1223 format = device->spec.format; |
5f6550e5184f
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changeset
|
1224 } |
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diff
changeset
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1225 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
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1226 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1227 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
1228 |
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
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1229 /* vi: set ts=4 sw=4 expandtab: */ |